JP6349210B2 - Thermoplastic material press molding equipment - Google Patents

Thermoplastic material press molding equipment Download PDF

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JP6349210B2
JP6349210B2 JP2014186609A JP2014186609A JP6349210B2 JP 6349210 B2 JP6349210 B2 JP 6349210B2 JP 2014186609 A JP2014186609 A JP 2014186609A JP 2014186609 A JP2014186609 A JP 2014186609A JP 6349210 B2 JP6349210 B2 JP 6349210B2
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heating body
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松月　功
功 松月
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Shibaura Machine Co Ltd
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この発明は、熱可塑性材料のプレス成形装置に関係している。   The present invention relates to a press molding apparatus for thermoplastic materials.

熱可塑性材料をプレス成形により所望の形状にする熱可塑性材料のプレス成形装置は種々の分野で使用されている。   2. Description of the Related Art A thermoplastic material press-molding apparatus for forming a thermoplastic material into a desired shape by press molding is used in various fields.

近年では、ガラスレンズやプリズム等の所望の寸法形状を有した高精度な光学素子を光学ガラス素材からプレス成形することもできる。   In recent years, high-precision optical elements having desired dimensions such as glass lenses and prisms can be press-molded from optical glass materials.

ガラスレンズの為の従来の熱可塑性材料のプレス成形装置は：上下一対の金型部材により構成される金型と；上下一対の金型部材を支持し上下一対の金型部材の少なくとも一方を他方に対し接近及び離間させる金型支持部と；上下一対の金型部材を金型支持部に固定する上下一対の金型固定部材により構成される金型固定部と；金型支持部により支持されている上下一対の金型部材の移動範囲を少なくとも覆う加熱位置と、上下一対の金型部材への熱可塑性材料の設置及び成形品の取り出しが可能な退避位置と、の間を移動する中空部材と；前記加熱位置の中空部材の内部空間を酸化防止環境にする不活性ガス供給部と；前記加熱位置の中空部材の内部空間及び上下一対の金型部材を光学ガラス素材プレス成形可能温度にする温度設定部と、を備える。前記金型支持部はピストン−シリンダ組み立て体を使用し、前記中空部材は石英ガラスを使用し、前記不活性ガス供給部は中空部材に接続された真空源及び不活性ガス供給源を有し、そして温度設定部は中空部材の外側に中空部材に接近して配置された赤外線ランプヒーター又は中空部材の内側に配置された高周波誘導加熱体を有する。   A conventional thermoplastic material press molding apparatus for a glass lens includes: a mold composed of a pair of upper and lower mold members; and a pair of upper and lower mold members that support at least one of the pair of upper and lower mold members. A mold support part that is moved toward and away from the mold; a mold fixing part that is composed of a pair of upper and lower mold fixing members that fix the pair of upper and lower mold members to the mold support part; and is supported by the mold support part A hollow member that moves between a heating position that covers at least the moving range of the pair of upper and lower mold members that is positioned and a retreat position where the thermoplastic material can be placed on the pair of upper and lower mold members and the molded product can be taken out An inert gas supply part that makes the internal space of the hollow member at the heating position an oxidation-preventing environment; and the internal space of the hollow member at the heating position and the pair of upper and lower mold members are set to a temperature capable of press molding the optical glass material. A temperature setting unit; Provided. The mold support uses a piston-cylinder assembly, the hollow member uses quartz glass, and the inert gas supply has a vacuum source and an inert gas supply connected to the hollow member, And the temperature setting part has the high frequency induction heating body arrange | positioned inside the infrared lamp heater arrange | positioned close to a hollow member on the outer side of a hollow member, or a hollow member.

このような従来の熱可塑性材料のプレス成形装置において所定の寸法形状を有したガラスレンズを光学ガラス素材からプレス成形するには、最初の準備段階で、金型支持部により上下一対の金型部材を離間位置に配置させ、中空部材が退避位置に配置され、そして温度設定部により上下一対の金型部材が酸化温度以下（約２００℃以下）にされている間に、予め酸化温度以下の所定温度にされている所定量の光学ガラス素材を前記離間位置の下側の金型部材の金型面に載置し、さらに中空部材を加熱位置に戻す。次に、不活性ガス供給部が加熱位置の中空部材の内部空間を真空源により負圧にしつつ不活性ガス供給源からの不活性ガスで満たし酸化防止環境にしている間に、温度設定部により上下一対の金型部材を、光学ガラス素材とともに、光学ガラス素材プレス成形可能温度にする。次に、金型支持部により上下一対の金型部材を所定の距離まで接近させて光学ガラス素材をガラスレンズへとプレス成形する。その後、上下一対の金型部材を離間位置に配置させるとともに温度設定部により上下一対の金型部材が酸化温度以下（約２００℃以下）にされた後に、中空部材が退避位置に配置されて前記離間位置の下側の金型部材の金型面からガラスレンズが取り除かれる。   In such a conventional thermoplastic material press molding apparatus, in order to press-mold a glass lens having a predetermined size and shape from an optical glass material, a pair of upper and lower mold members are formed by a mold support portion at the initial preparation stage. Is placed in the separated position, the hollow member is placed in the retracted position, and the pair of upper and lower mold members are brought to the oxidation temperature or lower (about 200 ° C. or lower) by the temperature setting unit, A predetermined amount of the optical glass material that is at a temperature is placed on the mold surface of the lower mold member, and the hollow member is returned to the heating position. Next, while the inert gas supply unit fills with an inert gas from the inert gas supply source while making the internal space of the hollow member at the heating position negative pressure with a vacuum source, the temperature setting unit The pair of upper and lower mold members are brought to an optical glass material press-moldable temperature together with the optical glass material. Next, the pair of upper and lower mold members are brought close to a predetermined distance by the mold support part, and the optical glass material is press-molded into a glass lens. After that, the pair of upper and lower mold members are arranged at the separated positions, and after the pair of upper and lower mold members are brought to the oxidation temperature or lower (about 200 ° C. or lower) by the temperature setting unit, the hollow member is arranged at the retracted position and The glass lens is removed from the mold surface of the lower mold member at the separated position.

中空部材が退避位置に移動される前には、中空部材の内部空間中の上下一対の金型部材の温度は光学ガラス素材プレス成形可能温度よりも低い酸化温度以下（約２００℃以下）にされる。   Before the hollow member is moved to the retracted position, the temperature of the pair of upper and lower mold members in the inner space of the hollow member is set to an oxidation temperature lower than the temperature capable of press molding the optical glass material (about 200 ° C. or lower). The

従って、次に新たな光学ガラス素材を離間位置の下側の金型部材の金型面に載置した後に、金型支持部により上下一対の金型部材の少なくとも一方を他方に対し接近させて光学ガラスにプレス成形する前に、中空部材を退避位置から加熱位置に戻し、前記内部空間を前記酸化防止環境に戻し、さらに上下一対の金型部材を温度設定部により光学ガラス素材プレス成形可能温度に戻さなければならない。   Accordingly, after a new optical glass material is placed on the mold surface of the lower mold member at the separation position, at least one of the upper and lower mold members is moved closer to the other by the mold support portion. Prior to press molding to optical glass, the hollow member is returned from the retracted position to the heating position, the internal space is returned to the oxidation-preventing environment, and the pair of upper and lower mold members are temperature-adjustable by the temperature setting unit. I have to go back to

しかも、上下一対の金型部材により光学ガラス素材をガラスレンズに高精度にプレス成形するには、金型部材の金型面の温度が全体として出来る限り均一であることが好ましい。   In addition, in order to press-mold an optical glass material into a glass lens with high accuracy using a pair of upper and lower mold members, it is preferable that the temperature of the mold surface of the mold member is as uniform as possible as a whole.

中空部材が加熱位置に戻された後で前記プレス成形を行う前に必要なこれらの復帰作業は、従来の熱可塑性材料のプレス成形装置において１回のプレス成形に必要なサイクルタイムを短くする障害になっている。   These return operations required after the hollow member has been returned to the heating position and before the press molding is an obstacle to shorten the cycle time required for one press molding in a conventional thermoplastic material press molding apparatus. It has become.

また金型面の寸法が大きくなるのに伴い、中空部材が加熱位置に戻された後で前記プレス成形前に金型部材の金型面の温度を全体として出来る限り均一に戻すのにより時間がかかるようになる。さらに、金型面の寸法がある程度以上大きくなると、最初の準備段階から金型部材の金型面の温度を全体として均一にすることが出来なくなり、金型面の中心部位の温度と金型面の外周部位の温度との差異が大きなままになる。このことは、これらの金型部材の金型面を使用して光学ガラス素材からプレス成形された後のガラスレンズの寸法精度を所望の値に出来ないことを意味している。   Further, as the dimension of the mold surface increases, it takes time to return the temperature of the mold surface of the mold member as uniformly as possible as a whole before the press molding after the hollow member is returned to the heating position. It becomes like this. Furthermore, if the dimension of the mold surface is increased to some extent, the temperature of the mold surface of the mold member cannot be made uniform as a whole from the initial preparation stage, and the temperature of the central part of the mold surface and the mold surface The difference with the temperature of the outer peripheral part of the remains large. This means that the dimensional accuracy of the glass lens after being press-molded from the optical glass material using the mold surfaces of these mold members cannot be set to a desired value.

特開２０１０−１５００５９号公報（特許文献１）には、上型及び下型の夫々の成形面に一体に配置され熱可塑性素材の温度を制御する導電膜ヒータを備えている光学素子の成形用型が開示されている。   Japanese Patent Laid-Open No. 2010-150059 (Patent Document 1) discloses a method for molding an optical element including a conductive film heater that is integrally disposed on the molding surfaces of an upper die and a lower die and controls the temperature of a thermoplastic material. A mold is disclosed.

しかしながら、この文献に記載の導電膜ヒータは上型及び下型の夫々の成形面に成形面と一体に配置されているので、上型及び下型の成形面により熱可塑性素材を所望の寸法形状にプレス成形する間に熱可塑性材料により上型及び下型の夫々の成形面に対し大きな力で押され破損を生じ易い。   However, since the conductive film heater described in this document is arranged integrally with the molding surfaces on the molding surfaces of the upper die and the lower die, the thermoplastic material is formed in a desired size and shape by the molding surfaces of the upper die and the lower die. During press molding, the thermoplastic material is likely to be damaged by being pressed with a large force against the molding surfaces of the upper mold and the lower mold.

特開２０１１−１３６８８３号公報（特許文献２）には、上型及び下型の型面間に挿脱可能な成形素材用ヒータと、上型及び下型の為の型支持部である上軸及び下軸から上型及び下型の中まで延出している棒状の上ヒータ及び下ヒータと、を備えた光学素子の成形装置が開示されている。   Japanese Patent Application Laid-Open No. 2011-136883 (Patent Document 2) discloses a heater for molding material that can be inserted and removed between mold surfaces of an upper mold and a lower mold, and an upper shaft that is a mold support for the upper mold and the lower mold. A rod-shaped upper and lower heaters extending from the lower shaft to the upper mold and the lower mold are disclosed.

しかしながら、この文献に記載の成形装置では、挿脱可能な成形素材用ヒータを上型及び下型の型面間に挿脱可能に設置する為の構造が複雑であり、また棒状の上ヒータ及び下ヒータを型支持部である上軸及び下軸から上型及び下型の中まで延出させる構造が複雑である。従って、これらの複雑な構造が特開２０１１−１３６８８３号公報（特許文献２）に記載の成形装置の製造コストを高くしている。さらに棒状の上ヒータ及び下ヒータは大きく、上型及び下型の型面の全体における精密な温度制御を難しくしている。   However, in the molding apparatus described in this document, the structure for installing the insertable / detachable molding material heater so as to be insertable / removable between the mold surfaces of the upper mold and the lower mold is complicated. The structure in which the lower heater extends from the upper shaft and the lower shaft, which are the mold support portions, into the upper mold and the lower mold is complicated. Therefore, these complicated structures increase the manufacturing cost of the molding apparatus described in Japanese Patent Application Laid-Open No. 2011-136883 (Patent Document 2). Furthermore, the bar-shaped upper heater and lower heater are large, and it is difficult to precisely control the temperature of the entire upper and lower mold surfaces.

特開２００９−２６９７７５号公報（特許文献３）には、上型保持部材及び下型保持部材の夫々の内部に発熱体を埋め込むか又はその全体を発熱体で構成し、上型保持部材及び下型保持部材自体を発熱する電気ヒータとして機能させる成形型ユニットが記載されている。   Japanese Patent Application Laid-Open No. 2009-269775 (Patent Document 3) discloses that a heating element is embedded in each of an upper mold holding member and a lower mold holding member, or the entirety thereof is formed of a heating element. A mold unit is described that allows the mold holding member itself to function as an electric heater that generates heat.

しかしながら、上型保持部材及び下型保持部材の内部にどのような発熱体をどのように埋め込むのか、及び、上型保持部材及び下型保持部材の全体をどのような発熱体でどのように構成するかについては記載されていない。   However, what kind of heating element is embedded in the upper mold holding member and the lower mold holding member, and how the entire upper mold holding member and lower mold holding member are configured with what heating element. There is no mention of what to do.

特開２０１０−１５００５９号公報JP 2010-150059 A 特開２０１１−１３６８８３号公報Japanese Patent Application Laid-Open No. 2011-136883 特開２００９−２６９７７５号公報JP 2009-269775 A

この発明は上記事情の下でなされ、本願の発明の目的は、１回のプレス成形に必要なサイクルタイムを従来よりも短く出来、しかも金型部材の金型面の寸法が大きくなっても金型面の全体に渡る温度分布を容易に所望に制御することが出来、さらには破損しにくく、簡易な構成の熱可塑性材料のプレス成形装置を提供することである。   The present invention has been made under the circumstances described above, and the object of the present invention is to reduce the cycle time required for one press molding as compared with the prior art, and even if the dimension of the mold surface of the mold member is increased, An object of the present invention is to provide a press molding apparatus for a thermoplastic material that can easily and desirably control the temperature distribution over the entire mold surface and is not easily damaged and has a simple configuration.

上述した目的を達成する為に、本願の発明に従った熱可塑性材料のプレス成形装置は、
熱可塑性材料を所望の形状に押圧成形する金型面をそれぞれ有する複数の金型部材で構成される金型と、
複数の金型部材をそれぞれ固定する複数の金型固定部材で構成される金型固定部と、
前記複数の金型固定部材を介して前記複数の金型部材をそれぞれ支持すると共に、相互に接近及び離反させる金型支持部と、
前記熱可塑性材料を成形可能温度に加熱する面状加熱体と、を備え、
前記面状加熱体が前記金型固定部の内部に設けられていて、
前記金型固定部材は、前記金型部材に接触固定される固定面に平行な分割面で分離可能な複数の固定部材により構成されており、
前記面状加熱体は、電気抵抗発熱部と複数の電極とで構成され、
前記複数の電極と前記複数の固定部材を分離可能に相互に固定する複数の締結部材が、電気的に接続されることにより外部接続端子を構成している、
ことを特徴としている。 In order to achieve the above-mentioned object, a press molding apparatus for a thermoplastic material according to the invention of the present application,
A mold composed of a plurality of mold members each having a mold surface for press-molding a thermoplastic material into a desired shape;
A mold fixing part composed of a plurality of mold fixing members that respectively fix a plurality of mold members;
A mold support part for supporting the plurality of mold members via the plurality of mold fixing members, and for approaching and separating from each other, and
A sheet heating body for heating the thermoplastic material to a moldable temperature,
The planar heating body is provided inside the mold fixing part ,
The mold fixing member is composed of a plurality of fixing members that can be separated by a dividing surface parallel to a fixing surface that is fixed in contact with the mold member,
The planar heater is composed of an electric resistance heating part and a plurality of electrodes,
A plurality of fastening members that fix the plurality of electrodes and the plurality of fixing members to each other in a separable manner constitute an external connection terminal by being electrically connected.
It is characterized by that.

上述した如く構成されている本願の発明に従った熱可塑性材料のプレス成形装置においては、面状加熱体が金型固定部の内部に設けられている。そして、この面状加熱体が金型固定部により固定されている金型の金型部材の金型面を熱可塑性材料プレス成形可能温度に加熱する。   In the thermoplastic material press molding apparatus according to the invention of the present application configured as described above, the planar heating element is provided inside the mold fixing portion. Then, the mold surface of the mold member of the mold in which the planar heating body is fixed by the mold fixing portion is heated to a temperature capable of press molding the thermoplastic material.

面状加熱体自体がコンパクトで簡素な外形状をしているので、金型固定部に面状加熱体を設ける為に必要な構成を簡素にすることが出来る。   Since the planar heating element itself has a compact and simple outer shape, the configuration necessary for providing the planar heating element in the mold fixing portion can be simplified.

金型固定部に設けられた面状加熱体は、対応する金型部材の金型面の寸法が大きくなっても対応する金型部材の金型面の全体に渡る温度分布を容易に制御することを可能にし、ひいては１回のプレス成形に必要なサイクルタイムを従来よりも短く出来、さらには複数の金型部材の金型面が予めプレス成形可能な温度に設定されている熱可塑性材料をプレス成形する間に熱可塑性材料から直接大きな力を受けることが無いので、破損しにくい。   The planar heating element provided in the mold fixing part easily controls the temperature distribution over the entire mold surface of the corresponding mold member even when the dimension of the mold surface of the corresponding mold member increases. As a result, the cycle time required for one press molding can be made shorter than before, and a mold material surface of a plurality of mold members is preliminarily set to a temperature at which press molding is possible. Since it does not receive a large force directly from the thermoplastic material during press molding, it is difficult to break.

本願の発明の第１実施形態に従った熱可塑性材料のプレス成形装置の全体を縦断面にして概略的に示す図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows schematically the whole press molding apparatus of the thermoplastic material according to 1st Embodiment of invention of this application in the longitudinal section. 図１の熱可塑性材料のプレス成形装置における下側の第２の金型部材と、下側の第２の金型部材を支持している下側の第２の金型固定部材と、を縦断面にして概略的に示す図である。A lower second mold member and a lower second mold fixing member supporting the lower second mold member in the thermoplastic material press molding apparatus of FIG. 1 are vertically cut. FIG. 図１のプレス成形装置で使用されている面状加熱体の概略的な平面図である。It is a schematic top view of the planar heating body used with the press molding apparatus of FIG. 図３の面状加熱体の概略的な水平断面図である。FIG. 4 is a schematic horizontal sectional view of the planar heating element of FIG. 3. 図１の熱可塑性材料のプレス成形装置において外側加熱器のみにより金型部材を加熱した場合の金型部材の中心部と外周部の温度変化を概略的に示す図である。It is a figure which shows roughly the temperature change of the center part and outer peripheral part of a mold member at the time of heating a mold member only with an outer side heater in the press molding apparatus of the thermoplastic material of FIG. 図１の熱可塑性材料のプレス成形装置において面状加熱体と外側加熱器とを使用して金型部材を加熱した場合の金型部材の中心部と外周部の温度変化を概略的に示す図である。The figure which shows schematically the temperature change of the center part and outer peripheral part of a mold member at the time of heating a mold member using a planar heating body and an outer side heater in the press molding apparatus of the thermoplastic material of FIG. It is. 図１の熱可塑性材料のプレス成形装置において面状加熱体のみにより金型部材を加熱した場合の金型部材の中心部と外周部の温度変化を概略的に示す図である。It is a figure which shows roughly the temperature change of the center part and outer peripheral part of a mold member at the time of heating a mold member only with a planar heating body in the press molding apparatus of the thermoplastic material of FIG. 本願の発明の第２実施形態に従った熱可塑性材料のプレス成形装置の全体を縦断面にして概略的に示す図である。It is a figure which shows roughly the whole press molding apparatus of the thermoplastic material according to 2nd Embodiment of invention of this application in the longitudinal section. 図８の第２実施形態に従った熱可塑性材料のプレス成形装置の全体の概略的な水平断面図である。FIG. 9 is a schematic horizontal cross-sectional view of the entire thermoplastic material press-molding apparatus according to the second embodiment of FIG. 8. 本願の発明に従った熱可塑性材料のプレス成形装置の面状加熱体の中心部及び周辺部電気抵抗発熱部を有した変形例の概略的な水平断面図である。It is a schematic horizontal sectional view of a modified example having a center part and a peripheral part electric resistance heating part of a sheet heating body of a press molding apparatus of a thermoplastic material according to the invention of the present application. 図１０の面状加熱体の変形例の概略的な下面図である。It is a schematic bottom view of the modification of the planar heating body of FIG. 前記変形例の面状加熱体を使用した図１のプレス成形装置において、中心部発熱部のみで加熱した金型部材の中心部、中間部、外周部の温度変化の概略図である。In the press molding apparatus of FIG. 1 using the planar heating element of the said modification, it is the schematic of the temperature change of the center part of the metal mold | die member heated only by the center part heat generating part, the intermediate part, and the outer peripheral part. 図１２と同じ構成のプレス成形装置において、周辺部発熱部のみで加熱した金型部材の中心部、中間部、外周部の温度変化の概略図である。It is the schematic of the temperature change of the center part of the metal mold | die member heated only by the peripheral part heat generating part, the intermediate part, and the outer peripheral part in the press molding apparatus of the same structure as FIG. 図１２と同じ構成のプレス成形装置において、周辺部及び中心部発熱部の両方で加熱した金型部材の中心部、中間部、外周部の温度変化の概略図である。FIG. 13 is a schematic view of temperature changes in the central part, the intermediate part, and the outer peripheral part of the mold member heated by both the peripheral part and the central part heating part in the press molding apparatus having the same configuration as FIG. 12. 図１２と同じ構成のプレス成形装置において、外側加熱器のみで加熱した金型部材の中心部、中間部、外周部の温度変化の概略図である。It is the schematic of the temperature change of the center part of the metal mold | die member heated only with the outer side heater, the intermediate part, and the outer peripheral part in the press molding apparatus of the same structure as FIG. 図１２と同じ構成のプレス成形装置において、中心部発熱部と外側加熱器とで加熱した金型部材の中心部、中間部、外周部の温度変化の概略図である。FIG. 13 is a schematic view of temperature changes in the central part, the intermediate part, and the outer peripheral part of the mold member heated by the central heat generating part and the outer heater in the press molding apparatus having the same configuration as FIG. 12. 図１２と同じ構成のプレス成形装置において、周辺部発熱部と外側加熱器とで加熱した金型部材の中心部、中間部、外周部の温度変化の概略図である。It is the schematic of the temperature change of the center part of the metal mold | die member heated with the peripheral part heat generating part and the outer side heater, and the outer peripheral part in the press molding apparatus of the same structure as FIG. 図１２と同じ構成のプレス成形装置において、中心部及び周辺部発熱部と外側加熱器とで加熱した金型部材の中心部、中間部、外周部の温度変化の概略図である。FIG. 13 is a schematic view of temperature changes in the center, middle, and outer periphery of the mold member heated by the center and periphery heating portions and the outer heater in the press molding apparatus having the same configuration as FIG. 12.

［第１実施形態］
以下、添付図面中の図１乃至図４を参照しながら本願の発明の第１実施形態に従った熱可塑性材料のプレス成形装置１の構成及び動作について説明する。 [First Embodiment]
Hereinafter, the configuration and operation of a press molding apparatus 1 for a thermoplastic material according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 4 in the accompanying drawings.

図１に概略的に示されている、本願の発明の第１実施形態に従った熱可塑性材料のプレス成形装置１は：
熱可塑性材料１０から所望の形状の製品をプレス成形する為の金型面を夫々有する上側の第１の金型部材１２Ａと、下側の第２の金型部材１２Ｂと、で構成される金型１２と；
前記上側の第１の金型部材１２Ａを保持する上側の第１の金型保持部材１３Ａと、前記下側の第２の金型部材１２Ｂを保持する下側の第２の金型保持部材１３Ｂと、で構成され前記金型１２を保持する金型保持部１３と；
前記上側の第１の金型部材１２Ａと前記上側の第１の金型保持部材１３Ａを固定する上側の第１の金型固定部材３２Ａと、前記下側の第２の金型部材１２Ｂと前記下側の第２の金型保持部材１３Ｂを固定する下側の第２の金型固定部材３２Ｂと、で構成され、前記金型１２及び前記金型保持部１３を固定する金型固定部３２と；
前記上側の第１の金型固定部材３２Ａから伝わる熱を遮断する上側の第１の中空断熱部材１５Ａと、前記下側の第２の金型固定部材３２Ｂから伝わる熱を遮断する下側の第２の中空断熱部材１５Ｂと、で構成され、前記金型固定部３２から伝わる熱を遮断する中空断熱部１５と；
前記上側の第１の中空断熱部材１５Ａに接続固定される上側の第１の金型支持軸１４ａと、前記下側の第２の中空断熱部材１５Ｂに接続固定される下側の第２の金型支持軸１４ｂと、で構成され、前記上側の第１の金型部材１２Ａ及び前記下側の第２の金型部材１２Ｂを支持し、前記上側の第１の金型部材１２Ａ及び前記下側の第２の金型部材１２Ｂを相互に接近及び離間させるように前記中空断熱部１５に接続固定される金型支持部１４と；
前記上側の第１の金型固定部材３２Ａの内部に設けられ、前記上側の第１の金型部材１２Ａを熱可塑性材料プレス成形可能温度に加熱する上側の第１の面状加熱体１６Ａと、前記下側の第２の金型固定部材３２Ｂの内部に設けられ、前記下側の第２の金型部材１２Ｂを熱可塑性材料プレス成形可能温度に加熱する下側の第２の面状加熱体１６Ｂと、で構成される面状加熱部１６と；
を備えている。 A press molding apparatus 1 of thermoplastic material according to a first embodiment of the present invention, schematically shown in FIG.
A mold composed of an upper first mold member 12A and a lower second mold member 12B each having a mold surface for press-molding a product having a desired shape from the thermoplastic material 10. With mold 12;
An upper first mold holding member 13A for holding the upper first mold member 12A and a lower second mold holding member 13B for holding the lower second mold member 12B. And a mold holding part 13 configured to hold the mold 12;
The upper first mold fixing member 32A for fixing the upper first mold member 12A and the upper first mold holding member 13A, the lower second mold member 12B, and the A lower mold fixing member 32B for fixing the lower second mold holding member 13B, and a mold fixing portion 32 for fixing the mold 12 and the mold holding portion 13. When;
The upper first hollow heat insulating member 15A that blocks heat transmitted from the upper first mold fixing member 32A and the lower first heat insulating member 15B that blocks heat transmitted from the lower second mold fixing member 32B. Two hollow heat insulating members 15B, and the hollow heat insulating portion 15 that blocks heat transmitted from the mold fixing portion 32;
The upper first mold support shaft 14a connected and fixed to the upper first hollow heat insulating member 15A, and the lower second gold connected and fixed to the lower second hollow heat insulating member 15B. A mold support shaft 14b, and supports the upper first mold member 12A and the lower second mold member 12B, and the upper first mold member 12A and the lower side. A mold support part 14 connected and fixed to the hollow heat insulating part 15 so that the second mold members 12B of the second mold member 12B approach and separate from each other;
An upper first planar heating body 16A provided in the upper first mold fixing member 32A and for heating the upper first mold member 12A to a temperature capable of press molding a thermoplastic material; A lower second planar heating body which is provided inside the lower second mold fixing member 32B and heats the lower second mold member 12B to a temperature capable of press molding a thermoplastic material. 16B and the planar heating part 16 comprised by;
It has.

第１実施形態の熱可塑性材料のプレス成形装置１はさらに：金型支持部１４により支持されている第１の金型部材１２Ａ及び第２の金型部材１２Ｂの移動範囲を少なくとも覆う加熱位置と前記金型１２への熱可塑性材料１０の設置及び成形品の取り出しが可能な退避位置との間を移動する中空部材１８と；前記加熱位置の中空部材１８の内部空間を酸化防止環境にする酸化防止部と、をさらに備えている。この実施形態において、前記中空部材１８の内部空間はプレス成形の為の成形室となり、酸化防止部は前記内部空間に不活性ガスを供給する不活性ガス供給部２０により構成されている。   The thermoplastic material press molding apparatus 1 according to the first embodiment further includes: a heating position that at least covers a moving range of the first mold member 12A and the second mold member 12B supported by the mold support portion 14; A hollow member 18 that moves between a retreat position where the thermoplastic material 10 can be placed on the mold 12 and a molded product can be taken out; and an oxidation that makes the internal space of the hollow member 18 at the heating position an antioxidant environment And a prevention unit. In this embodiment, the internal space of the hollow member 18 becomes a molding chamber for press molding, and the antioxidant part is constituted by an inert gas supply part 20 for supplying an inert gas to the internal space.

第１実施形態の熱可塑性材料のプレス成形装置１はまたさらに：第１の金型部材１２Ａ及び第２の金型部材１２Ｂの外側に配置され第１の金型部材１２Ａ及び第２の金型部材１２Ｂの金型面を熱可塑性材料プレス成形可能温度に加熱する外側加熱器２２をさらに備えているとともに、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの金型面の温度分布を直接的又は間接的に測定する為の図示されていない金型面温度分布測定要素を備えている。金型面温度分布測定要素は、第１の金型部材１２Ａ及び第２の金型部材１２Ｂ内に配置された熱電対である。この実施形態において金型面温度分布測定要素は、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々の外周部及び中心部に配置されている。   The thermoplastic material press-molding apparatus 1 of the first embodiment is still further: the first mold member 12A and the second mold disposed outside the first mold member 12A and the second mold member 12B. The heater 12 further includes an outer heater 22 that heats the mold surface of the member 12B to a temperature at which the thermoplastic material can be pressed, and the temperature distribution of the mold surfaces of the first mold member 12A and the second mold member 12B. A die surface temperature distribution measuring element (not shown) for directly or indirectly measuring the temperature is provided. The mold surface temperature distribution measuring element is a thermocouple arranged in the first mold member 12A and the second mold member 12B. In this embodiment, the mold surface temperature distribution measuring element is arranged at the outer peripheral portion and the center portion of the first mold member 12A and the second mold member 12B.

この実施形態における熱可塑性材料のプレス成形装置１は、熱可塑性材料１０として光学ガラス素材を使用し、光学ガラス素材からプレス成形される所望の形状の製品はガラスレンズやプリズム等の所望の寸法形状を有した高精度な光学素子である。この実施形態の熱可塑性材料のプレス成形装置１は、第１の金型部材１２Ａ及び第２の金型部材１２Ｂを使用して光学ガラス素材からガラスレンズをプレス成形する。   The thermoplastic material press-molding apparatus 1 in this embodiment uses an optical glass material as the thermoplastic material 10, and a product having a desired shape that is press-molded from the optical glass material has a desired dimensional shape such as a glass lens or a prism. It is a high-precision optical element having The thermoplastic material press-molding apparatus 1 of this embodiment press-molds a glass lens from an optical glass material using the first mold member 12A and the second mold member 12B.

この実施形態において金型支持部１４は、同軸に一直線状に上下に分かれて配置された第１の金型支持軸１４ａ及び第２の金型支持軸１４ｂを含む。第１の金型支持軸１４ａの上端部及び第２の金型支持軸１４ｂの下端部は同一の固定フレーム２４に固定されている。第２の金型支持軸１４ｂの上端部には第２の中空断熱部材１５Ｂが固定されていて、第２の中空断熱部材１５Ｂの上端部には、第２の金型部材１２Ｂが固定された第２の金型固定部材３２Ｂが固定されている。第１の金型支持軸１４ａの下端部には第１の中空断熱部材１５Ａが固定されていて、第１の中空断熱部材１５Ａの下端部には、第１の金型部材１２Ａが固定された第１の金型固定部材３２Ａが固定されている。第１の金型支持軸１４ａ及び第２の金型支持軸１４ｂに第１の中空断熱部材１５Ａ及び第２の中空断熱部材１５Ｂを介して第１の金型固定部材３２Ａ及び第２の金型固定部材３２Ｂにより固定されている第１の金型部材１２Ａ及び第２の金型部材１２Ｂは、夫々の金型面を対向させている。   In this embodiment, the mold support portion 14 includes a first mold support shaft 14a and a second mold support shaft 14b that are coaxially arranged in a straight line and are vertically divided. The upper end portion of the first mold support shaft 14 a and the lower end portion of the second mold support shaft 14 b are fixed to the same fixed frame 24. The second hollow heat insulating member 15B is fixed to the upper end portion of the second mold support shaft 14b, and the second mold member 12B is fixed to the upper end portion of the second hollow heat insulating member 15B. The second mold fixing member 32B is fixed. The first hollow heat insulating member 15A is fixed to the lower end portion of the first mold support shaft 14a, and the first mold member 12A is fixed to the lower end portion of the first hollow heat insulating member 15A. The first mold fixing member 32A is fixed. The first mold support shaft 14a and the second mold support shaft 14b are connected to the first mold fixing member 32A and the second mold via the first hollow heat insulating member 15A and the second hollow heat insulating member 15B. The first mold member 12A and the second mold member 12B fixed by the fixing member 32B are opposed to each other.

詳細には、第２の金型支持軸１４ｂの下端部は、固定フレーム２４に対し上下方向に移動可能に支持された移動案内部２６を介して金型支持軸駆動機構２８に連結されている。この実施形態において金型支持軸駆動機構２８は、移動案内部２６と、移動案内部２６に固定されロードセルなどの押圧力検出器ＬＤが設置された上下方向移動軸２８ａと、固定フレーム２４に固定されサーボモータなどの回転力供給源２８ｂからの回転力により上下方向移動軸２８ａを上下方向に移動させる駆動力伝達部２８ｃと、を含む。駆動力伝達部２８ｃはサーボモータなどの回転力供給源２８ｂの出力軸の回転方向，回転数及び回転角度により上下方向移動軸２８ａの上下方向の移動距離を精密に制御することが出来る減速機である。   Specifically, the lower end portion of the second mold support shaft 14b is connected to the mold support shaft drive mechanism 28 via a movement guide portion 26 supported so as to be movable in the vertical direction with respect to the fixed frame 24. . In this embodiment, the mold support shaft drive mechanism 28 is fixed to the movement guide unit 26, the vertical movement shaft 28 a fixed to the movement guide unit 26 and provided with a pressing force detector LD such as a load cell, and the fixed frame 24. And a driving force transmission unit 28c that moves the vertical movement shaft 28a in the vertical direction by a rotational force from a rotational power supply source 28b such as a servo motor. The driving force transmission unit 28c is a speed reducer that can precisely control the vertical movement distance of the vertical movement shaft 28a according to the rotation direction, rotation speed, and rotation angle of the output shaft of the rotational force supply source 28b such as a servo motor. is there.

金型支持軸駆動機構２８は、第２の金型支持軸１４ｂの上下方向の移動距離を精密に制御することが出来るとともに第１の金型部材１２Ａ及び第２の金型部材１２Ｂを使用した光学ガラス素材からのガラスレンズのプレス成形を可能にする機構により構成されている。   The mold support shaft drive mechanism 28 can precisely control the vertical movement distance of the second mold support shaft 14b and uses the first mold member 12A and the second mold member 12B. It is configured by a mechanism that enables press molding of a glass lens from an optical glass material.

この実施形態において中空部材１８は、図１中に示されている如く、金型支持部１４の第１の金型支持軸１４ａの下端部の第１の金型部材１２Ａ及び第２の金型支持軸１４ｂの上端部の第２の金型部材１２Ｂを取り囲むよう第１の金型支持軸１４ａの下端部及び第２の金型支持軸１４ｂの上端部に対し同心的に配置された筒状の石英ガラスなどの耐熱部材である。   In this embodiment, as shown in FIG. 1, the hollow member 18 includes a first mold member 12 </ b> A and a second mold at the lower end of the first mold support shaft 14 a of the mold support 14. A cylindrical shape disposed concentrically with respect to the lower end portion of the first mold support shaft 14a and the upper end portion of the second mold support shaft 14b so as to surround the second mold member 12B at the upper end portion of the support shaft 14b. It is a heat-resistant member such as quartz glass.

中空部材１８は、図１中に示されている如く金型支持部１４の第１の金型支持軸１４ａの下端部の第１の金型部材１２Ａ及び第２の金型支持軸１４ｂの上端部の第２の金型部材１２Ｂを覆い取り囲んだ加熱位置と、加熱位置から第１の金型支持軸１４ａ及び第２の金型支持軸１４ｂの長手方向中心線に沿い移動し第１の金型部材１２Ａ及び第２の金型部材１２Ｂを覆わない退避位置と、の間で移動可能である。退避位置の中空部材１８は、第１の金型部材１２Ａ及び第２の金型部材１２Ｂに対する接近を可能にする。この実施形態において中空部材１８の退避位置は、図１に示されている加熱位置よりも上方である。   As shown in FIG. 1, the hollow member 18 has upper ends of the first mold member 12A and the second mold support shaft 14b at the lower end portion of the first mold support shaft 14a of the mold support portion 14. The heating position that covers and surrounds the second mold member 12B, and the first mold moves from the heating position along the longitudinal center line of the first mold support shaft 14a and the second mold support shaft 14b. The mold member 12A and the second mold member 12B are movable between a retracted position that does not cover the mold member 12A and the second mold member 12B. The hollow member 18 in the retracted position enables access to the first mold member 12A and the second mold member 12B. In this embodiment, the retracted position of the hollow member 18 is above the heating position shown in FIG.

この実施形態において中空部材１８の上端部は、図１中に示されている如く、金型支持部１４の第１の金型支持軸１４ａの外周面に対し気密状態で前記長手方向中心線に沿い移動可能に支持されている。このような支持は、中空部材１８の上端部の内周面と第１の金型支持軸１４ａの外周面との間にＯ−リング等の密封摺接部材を介在させることにより可能である。   In this embodiment, as shown in FIG. 1, the upper end of the hollow member 18 is centered on the longitudinal center line in an airtight state with respect to the outer peripheral surface of the first mold support shaft 14 a of the mold support 14. It is supported so that it can move along. Such support is possible by interposing a sealing sliding contact member such as an O-ring between the inner peripheral surface of the upper end portion of the hollow member 18 and the outer peripheral surface of the first mold support shaft 14a.

この実施形態において中空部材１８の下端部は、図１中に示されている如く、中空部材１８が加熱位置に配置されている間に、金型支持部１４の第２の金型支持軸１４ｂの外周面に対し気密状態で支持されている。このような支持は、中空部材１８の下端部の内周面と第２の金型支持軸１４ｂの外周面との間にＯ−リング等の密封摺接部材を介在させることにより可能である。中空部材１８が図１の加熱位置から上方の退避位置に向かい移動された時、中空部材１８の下端部は第２の金型支持軸１４ｂの外周面から上方に離れる。   In this embodiment, the lower end portion of the hollow member 18 is, as shown in FIG. 1, the second mold support shaft 14b of the mold support portion 14 while the hollow member 18 is disposed at the heating position. It is supported in an airtight state with respect to the outer peripheral surface. Such support is possible by interposing a sealing sliding contact member such as an O-ring between the inner peripheral surface of the lower end portion of the hollow member 18 and the outer peripheral surface of the second mold support shaft 14b. When the hollow member 18 is moved from the heating position of FIG. 1 toward the upper retreat position, the lower end portion of the hollow member 18 is separated upward from the outer peripheral surface of the second mold support shaft 14b.

中空部材１８をこのような加熱位置と退避位置との間で選択的に移動させる為の中空部材駆動部３０が、固定フレーム２４に設けられている。中空部材駆動部３０は、圧縮空気により動作するピストン―シリンダ組み立て体等により構成されている。この実施形態では、ピストン―シリンダ組み立て体のシリンダ３０ａが固定フレーム２４に固定されていて、ピストン３０ｂの延出端部が中空部材１８の上端部に固定されている。   A hollow member driving unit 30 for selectively moving the hollow member 18 between the heating position and the retracted position is provided on the fixed frame 24. The hollow member drive unit 30 is constituted by a piston-cylinder assembly or the like that is operated by compressed air. In this embodiment, the cylinder 30 a of the piston-cylinder assembly is fixed to the fixed frame 24, and the extending end of the piston 30 b is fixed to the upper end of the hollow member 18.

この実施形態において不活性ガス供給部２０は、加熱位置に配置された中空部材１８の内部空間に接続された真空ポンプ２０ａと不活性ガス供給源２０ｂとを含む。不活性ガスは例えば窒素ガス等である。   In this embodiment, the inert gas supply unit 20 includes a vacuum pump 20a and an inert gas supply source 20b connected to the internal space of the hollow member 18 disposed at the heating position. The inert gas is, for example, nitrogen gas.

この実施形態において外側加熱器２２は、中空部材１８の外周面に接近して前記外周面を取り囲むよう配置され、複数の赤外線ランプなどの反射板付き放熱電気ランプである。外側加熱器２２は中空部材１８に取り付けられていて、中空部材１８とともに中空部材１８の加熱位置と退避位置との間で移動可能である。   In this embodiment, the outer heater 22 is a heat-dissipating electric lamp with a reflector such as a plurality of infrared lamps, which is disposed so as to approach the outer peripheral surface of the hollow member 18 and surround the outer peripheral surface. The outer heater 22 is attached to the hollow member 18 and is movable between the heating position and the retracted position of the hollow member 18 together with the hollow member 18.

第１の金型部材１２Ａ及び第２の金型部材１２Ｂは第１の金型保持部材１３Ａ及び第２の金型保持部材１３Ｂに保持されていて、第１の金型保持部材１３Ａ及び第２の金型保持部材１３Ｂが固定ボルト等の固定部品（締結部品）により第１の金型固定部材３２Ａ及び第２の金型固定部材３２Ｂに対し着脱可能に固定されている。この実施形態において、第２の金型部材１２Ｂが固定された第２の金型固定部材３２Ｂは、金型支持部１４の第２の金型支持軸１４ｂの上端部の端に固定されている第２の中空断熱部材１５Ｂの上端に固定ボルト等の固定部品（締結部品）により固定されている。また、第１の金型部材１２Ａが固定された第１の金型固定部材３２Ａは、金型支持部１４の第１の金型支持軸１４ａの下端部の端に固定されている第１の中空断熱部材１５Ａの下端に固定ボルト等の固定部品（締結部品）により固定されている。   The first mold member 12A and the second mold member 12B are held by the first mold holding member 13A and the second mold holding member 13B, and the first mold holding member 13A and the second mold member 12B. The mold holding member 13B is detachably fixed to the first mold fixing member 32A and the second mold fixing member 32B by fixing parts (fastening parts) such as fixing bolts. In this embodiment, the second mold fixing member 32B to which the second mold member 12B is fixed is fixed to the end of the upper end portion of the second mold support shaft 14b of the mold support portion 14. It is fixed to the upper end of the second hollow heat insulating member 15B by a fixing component (fastening component) such as a fixing bolt. Further, the first mold fixing member 32A to which the first mold member 12A is fixed is fixed to the end of the lower end portion of the first mold support shaft 14a of the mold support portion 14. It is fixed to the lower end of the hollow heat insulating member 15A by a fixing part (fastening part) such as a fixing bolt.

中空断熱部材１５Ａ，１５Ｂは前述したプレス成形時に中空断熱部材１５Ａ，１５Ｂに負荷される力に耐えることはもちろんのこと、第１の金型固定部材３２Ａ及び第２の金型固定部材３２Ｂからの熱伝達を阻止する窒化珪素等の材料により形成されている。   The hollow heat insulating members 15A and 15B withstand the force applied to the hollow heat insulating members 15A and 15B during the press molding described above, as well as from the first mold fixing member 32A and the second mold fixing member 32B. It is made of a material such as silicon nitride that prevents heat transfer.

また、第１の金型部材１２Ａ及び第２の金型部材１２Ｂ、第１の金型保持部材１３Ａ及び第２の金型保持部材１３Ｂ、第１の金型固定部材３２Ａ及び第２の金型固定部材３２Ｂ、そしてこれらの為の前述した固定ボルト等の固定部品（締結部品）は、前述したプレス成形の為にこれらに負荷される力及び熱により変質しない超硬合金又はタングステン合金等の材料により形成されている。   Also, the first mold member 12A and the second mold member 12B, the first mold holding member 13A and the second mold holding member 13B, the first mold fixing member 32A and the second mold. The fixing member 32B and the above-described fixing parts (fastening parts) such as the fixing bolts are made of a material such as cemented carbide or tungsten alloy that does not change due to the force and heat applied to the above-described press forming. It is formed by.

さらに、第２の金型保持部材１３Ｂにおいて第２の金型部材１２Ｂの金型面の周囲の複数の所定位置に図示されていない位置決めピンが固定されていて、第１の金型保持部材１３Ａにおいて第１の金型部材１２Ａの金型面の周囲の複数の所定位置に図示されていない位置決め凹部が形成されている。前述したプレス成形の為に第１の金型部材１２Ａ及び第２の金型部材１２Ｂとともに第１の金型保持部材１３Ａ及び第２の金型保持部材１３Ｂが相互に接近されると、第２の金型保持部材１３Ｂの前述した図示されていない複数の位置決めピンが第１の金型保持部材１３Ａの前述した図示されていない複数の位置決め凹部に嵌合し、金型支持部１４の第１の金型支持軸１４ａ及び第２の金型支持軸１４ｂの同心の長手方向中心線に対し第１の金型部材１２Ａ及び第２の金型部材１２Ｂを確実に同軸に維持する。   Further, in the second mold holding member 13B, positioning pins (not shown) are fixed at a plurality of predetermined positions around the mold surface of the second mold member 12B, and the first mold holding member 13A. In FIG. 5, positioning recesses (not shown) are formed at a plurality of predetermined positions around the mold surface of the first mold member 12A. When the first mold holding member 13A and the second mold holding member 13B are brought close to each other together with the first mold member 12A and the second mold member 12B for the press molding described above, The plurality of positioning pins (not shown) of the mold holding member 13B are fitted into the plurality of positioning recesses (not shown) of the first mold holding member 13A. The first mold member 12A and the second mold member 12B are reliably maintained coaxially with respect to the concentric longitudinal center line of the mold support shaft 14a and the second mold support shaft 14b.

第１の金型固定部材３２Ａ及び第２の金型固定部材３２Ｂの夫々は、上下対称に互いに同じ構造をしている。従って、図２を参照して第２の金型固定部材３２Ｂの構造を説明し、第１の金型固定部材３２Ａの説明は省略する。第２の金型固定部材３２Ｂは第２の金型部材１２Ｂ及び第２の金型保持部材１３Ｂに接触固定される固定面に平行な分割面で分離可能な第１及び第２固定部材３２ｄ，３２ｅにより構成されている。第２の金型固定部材３２Ｂの第１及び第２固定部材３２ｄ，３２ｅの固定は、固定ボルト等の固定部品（締結要素）により行われている。   Each of the first mold fixing member 32A and the second mold fixing member 32B has the same structure in a vertically symmetrical manner. Therefore, the structure of the second mold fixing member 32B will be described with reference to FIG. 2, and the description of the first mold fixing member 32A will be omitted. The second mold fixing member 32B includes first and second fixing members 32d, which are separable by a split surface parallel to a fixing surface that is fixed in contact with the second mold member 12B and the second mold holding member 13B. 32e. The first and second fixing members 32d and 32e of the second mold fixing member 32B are fixed by fixing parts (fastening elements) such as fixing bolts.

この実施形態においては、第１及び第２固定部材３２ｄ，３２ｅの分割面は、第２の金型支持軸１４ｂの長手方向中心線と直交している。第２の金型部材１２Ｂが固定された第１固定部材３２ｄの分割面と第１固定部材３２ｄに隣接した第２固定部材３２ｅの分割面との少なくとも一方に面状加熱体格納凹部３２ｆが形成されている（図２に、第２の金型支持軸１４ｂの上端部の第２の金型固定部材３２Ｂの第１固定部材３２ｄに形成されている面状加熱体格納凹部３２ｆが示されている）。なお、面状加熱体格納凹部３２ｆは、第２の金型部材１２Ｂが固定された第１固定部材３２ｄの分割面とこの第１固定部材３２ｄに隣接した第２固定部材３２ｅの分割面との両方に渡り形成されていても良い。   In this embodiment, the dividing surfaces of the first and second fixing members 32d and 32e are orthogonal to the longitudinal center line of the second mold support shaft 14b. A planar heating element storage recess 32f is formed on at least one of the divided surface of the first fixing member 32d to which the second mold member 12B is fixed and the divided surface of the second fixing member 32e adjacent to the first fixing member 32d. (FIG. 2 shows the planar heating element storage recess 32f formed in the first fixing member 32d of the second mold fixing member 32B at the upper end of the second mold support shaft 14b. ) The planar heating element storage recess 32f includes a split surface of the first fixing member 32d to which the second mold member 12B is fixed and a split surface of the second fixing member 32e adjacent to the first fixing member 32d. It may be formed over both.

面状加熱体格納凹部３２ｆは、そこに格納される第２の面状加熱体１６Ｂの平面形状及び平面寸法そして厚さと略同じ平面形状及び平面寸法そして深さを有している。   The planar heating element storage recess 32f has a planar shape, a planar dimension and a depth substantially the same as the planar shape, planar dimension and thickness of the second planar heating element 16B stored therein.

第２の金型固定部材３２Ｂは、そこに形成されている面状加熱体格納凹部３２ｆ中に配置されている第２の面状加熱体１６Ｂの平面を、第２の金型部材１２Ｂが固定された第１固定部材３２ｄに熱伝達効率向上の為に密着させる熱伝導部材ＨＣを含んでいる。   In the second mold fixing member 32B, the second mold member 12B fixes the plane of the second planar heating body 16B disposed in the planar heating body storage recess 32f formed therein. A heat conducting member HC is provided to be in close contact with the first fixing member 32d thus formed in order to improve heat transfer efficiency.

熱伝導部材ＨＣは、面状加熱体格納凹部３２ｆの底面とこの底面に対面している第２の面状加熱体１６Ｂの平面との間に介在された耐熱性及び良熱伝導性を有した高熱伝導材料で構成されている。或いは熱伝導部材ＨＣは、第２の面状加熱体１６Ｂにおいて第１固定部材３２ｄとは反対側の平面と第２固定部材３２ｅにおいて第２の面状加熱体１６Ｂの前記反対側の平面と対面する部位との間に介在された弾性体により構成されている。弾性体は、面状加熱体格納凹部３２ｆの底面に対しこの底面に対面している第２の面状加熱体１６Ｂの平面を密着させるよう押し付ける。弾性体は、耐熱性を有した弾性材料又は螺旋ばね又は板ばねその他の種々の形状のばねである。   The heat conduction member HC had heat resistance and good heat conductivity interposed between the bottom surface of the planar heating element storage recess 32f and the plane of the second planar heating element 16B facing the bottom surface. Consists of high thermal conductivity materials. Alternatively, the heat conducting member HC faces the plane opposite to the first fixing member 32d in the second planar heating body 16B and the plane opposite to the second planar heating body 16B in the second fixing member 32e. It is comprised by the elastic body interposed between the site | parts to perform. The elastic body is pressed so that the flat surface of the second planar heating body 16B facing the bottom surface is in close contact with the bottom surface of the planar heating body storage recess 32f. The elastic body is an elastic material having heat resistance or a spring having various shapes such as a spiral spring or a leaf spring.

第１の金型固定部材３２Ａ及び第２の金型固定部材３２Ｂの夫々は、第１固定部材３２ｄ及び第２固定部材３２ｅの少なくとも一方を選択的に冷却させる冷却部ＣＳを含む。この実施形態において冷却部ＣＳは、第１固定部材３２ｄ及び第２固定部材３２ｅの少なくともいずれか一方に形成された複数の冷却媒体通路である。   Each of the first mold fixing member 32A and the second mold fixing member 32B includes a cooling unit CS that selectively cools at least one of the first fixing member 32d and the second fixing member 32e. In this embodiment, the cooling part CS is a plurality of cooling medium passages formed in at least one of the first fixing member 32d and the second fixing member 32e.

この実施形態では、第２の中空断熱部材１５Ｂに隣接する第２固定部材３２ｅの表面に複数の冷却媒体通路が形成されている。複数の冷却媒体通路は冷却媒体供給源に接続され、冷却媒体供給源は選択的に冷却媒体を複数の冷却媒体通路に供給する。冷却媒体は、本願の発明に従った第１実施形態の熱可塑性材料のプレス成形装置１の種々の構成部材及び熱可塑性材料１０を変質させないものでなくてはならない。   In this embodiment, a plurality of cooling medium passages are formed on the surface of the second fixing member 32e adjacent to the second hollow heat insulating member 15B. The plurality of cooling medium passages are connected to a cooling medium supply source, and the cooling medium supply source selectively supplies the cooling medium to the plurality of cooling medium passages. The cooling medium must not change the various constituent members of the thermoplastic material press-forming apparatus 1 and the thermoplastic material 10 according to the first embodiment of the present invention.

この実施形態において冷却媒体は、不活性ガス供給源２０ｂから選択的に供給される窒素ガス等の不活性ガスである。   In this embodiment, the cooling medium is an inert gas such as nitrogen gas that is selectively supplied from the inert gas supply source 20b.

この実施形態において第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの夫々は、図３中に示されている如く、円板状の本体ＭＢと、本体ＭＢの円周面において本体ＭＢの直径方向に突出した一対の電極部ＥＴ１，ＥＴ２と、を含む。   In this embodiment, each of the first planar heating body 16A and the second planar heating body 16B has a disc-shaped main body MB and a circumferential surface of the main body MB as shown in FIG. It includes a pair of electrode portions ET1, ET2 protruding in the diameter direction of the main body MB.

第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの夫々は、電気抵抗発熱部ＨＰと電気抵抗発熱部ＨＰの為の複数の電極を含む。詳細には、この実施形態において第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの夫々は、黒鉛やＳｉＣ等の導電体で形成された図示されていない円板状のコアの周囲をＰＢＮ（パイロリティックボロンナイトライド：熱分解窒化硼素）等の絶縁体でＣＶＤ等によりコーティングし、さらにその上に一対の電極部ＥＴ１，ＥＴ２間で黒鉛やＳｉＣ等の導電体で電気抵抗発熱部ＨＰとなる所望のパターン形状を形成し、さらにその上をＰＢＮ（パイロリティックボロンナイトライド：熱分解窒化硼素）等の絶縁体でＣＶＤ等によりコーティングすることにより作成されている。第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの夫々の絶縁体は、面の厚さ方向には熱伝導が悪く、面が広がる方向には熱伝導が良い。   Each of the first planar heating body 16A and the second planar heating body 16B includes a plurality of electrodes for the electrical resistance heating part HP and the electrical resistance heating part HP. Specifically, in this embodiment, each of the first planar heating body 16A and the second planar heating body 16B is a disk-shaped core (not shown) formed of a conductor such as graphite or SiC. The surroundings are coated with an insulator such as PBN (pyrolytic boron nitride) by CVD or the like, and further, electrical resistance heat is generated between the pair of electrode portions ET1 and ET2 by a conductor such as graphite or SiC. A desired pattern shape to be a part HP is formed, and further coated thereon by CVD or the like with an insulator such as PBN (pyrolytic boron nitride). Each of the insulators of the first planar heating body 16A and the second planar heating body 16B has poor heat conduction in the thickness direction of the face and good heat conduction in the direction in which the face spreads.

導電体の電気抵抗発熱部ＨＰは、第１の面状加熱体１６Ａ又は第２の面状加熱体１６Ｂにより加熱される第１の金型部材１２Ａ又は第２の金型部材１２Ｂの金型面における所望の温度分布に対応したパターン形状を有している。   The electric resistance heating part HP of the conductor is the mold surface of the first mold member 12A or the second mold member 12B heated by the first planar heater 16A or the second planar heater 16B. Has a pattern shape corresponding to a desired temperature distribution.

さらに詳細には、この実施形態において、導電体の電気抵抗発熱部ＨＰの所望のパターン形状は、図４中に示されている如く、一方の電極部ＥＴ１から本体ＭＢの一方の半円に沿い他方の電極部ＥＴ２に向かい延出した後に本体ＭＢの中心に向かい螺旋状に延出し、さらに本体ＭＢの中心から一方の電極部ＥＴ１に向かい螺旋状に延出した後に本体ＭＢの他方の半円に沿い他方の電極部ＥＴ２に向かい延出している。一対の電極部ＥＴ１，ＥＴ２に配置されている電気抵抗発熱部ＨＰの両端部位は、電気抵抗発熱部ＨＰの為の電極Ｔ１，Ｔ２となっている。導電体の電気抵抗発熱部ＨＰのこのようなパターン形状では、第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの夫々は、夫々の平面が広がる方向において略均一な発熱特性を有する。   More specifically, in this embodiment, the desired pattern shape of the electric resistance heating part HP of the conductor is from one electrode part ET1 to one semicircle of the main body MB as shown in FIG. After extending toward the other electrode portion ET2, it extends spirally toward the center of the main body MB, and further extends spirally from the center of the main body MB toward one electrode portion ET1, and then the other semicircle of the main body MB. And extending toward the other electrode portion ET2. Both end portions of the electric resistance heating part HP arranged in the pair of electrode parts ET1, ET2 are electrodes T1, T2 for the electric resistance heating part HP. In such a pattern shape of the electric resistance heating portion HP of the conductor, each of the first planar heating body 16A and the second planar heating body 16B has a substantially uniform heat generation characteristic in the direction in which the respective planes expand. Have.

一対の電極部ＥＴ１，ＥＴ２には、所望のパターン形状の電気抵抗発熱部ＨＰの両端部位の電極Ｔ１，Ｔ２が露出された一対の電極露出開口ＴＯ１，ＴＯ２が形成されている。   The pair of electrode portions ET1 and ET2 are formed with a pair of electrode exposure openings TO1 and TO2 in which the electrodes T1 and T2 at both ends of the electric resistance heating portion HP having a desired pattern shape are exposed.

第１の金型固定部材３２Ａ及び第２の金型固定部材３２Ｂの夫々の第１固定部材３２ｄ及び第２固定部材３２ｅの為の前述した固定ボルト等の固定部材（締結部材）の中の２つが、図２中に示されている如く、第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの夫々の一対の電極部ＥＴ１，ＥＴ２の一対の電極露出開口ＴＯ１，ＴＯ２に挿入され電気抵抗発熱部ＨＰの所望のパターン形状の両端部位の電極Ｔ１，Ｔ２に電気的に接続されて外部接続端子ＯＴ１，ＯＴ２を構成している。外部接続端子ＯＴ１，ＯＴ２は、第１の金型固定部材３２Ａ及び第２の金型固定部材３２Ｂの夫々の第１固定部材３２ｄ及び第２固定部材３２ｅに対しては碍子等の電気絶縁部材を介して接触している。   Two of the fixing members (fastening members) such as the fixing bolt described above for the first fixing member 32d and the second fixing member 32e of the first mold fixing member 32A and the second mold fixing member 32B, respectively. As shown in FIG. 2, the first planar heating body 16A and the second planar heating body 16B are inserted into the pair of electrode exposure openings TO1 and TO2 of the pair of electrode portions ET1 and ET2, respectively. Then, the external connection terminals OT1 and OT2 are configured by being electrically connected to the electrodes T1 and T2 at both ends of the desired pattern shape of the electric resistance heating part HP. The external connection terminals OT1 and OT2 are made of an electrical insulating member such as an insulator for the first fixing member 32d and the second fixing member 32e of the first mold fixing member 32A and the second mold fixing member 32B, respectively. Is touching through.

図１乃至図４を参照しながら前述されたこの発明の第１実施形態の熱可塑性材料のプレス成形装置１においては、第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂ，金型支持部１４の第２の金型支持軸１４ｂの為の金型支持軸駆動機構２８の上下方向移動軸２８ａのロードセル等の押圧力検出器ＬＤ及びサーボモータ等の回転力供給源２８ｂ，中空部材駆動部３０，不活性ガス供給部２０の真空ポンプ２０ａ及び不活性ガス供給源２０ｂ，外側加熱器２２，そして前述した図示されていない金型面温度分布測定要素が制御装置３４に接続されている。   In the thermoplastic material press molding apparatus 1 according to the first embodiment of the present invention described above with reference to FIGS. 1 to 4, the first planar heating body 16A, the second planar heating body 16B, and the gold The mold support shaft drive mechanism 28 for the second mold support shaft 14b of the mold support 14 has a pressing force detector LD such as a load cell for the vertical movement shaft 28a of the mold support shaft drive mechanism 28 and a rotational force supply source 28b such as a servo motor, hollow The member driving unit 30, the vacuum pump 20 a and the inert gas supply source 20 b of the inert gas supply unit 20, the outer heater 22, and the above-described mold surface temperature distribution measurement element (not shown) are connected to the controller 34. Yes.

次に、前述した如く構成されているこの発明の第１実施形態の熱可塑性材料のプレス成形装置１の動作を説明する。   Next, the operation of the thermoplastic material press molding apparatus 1 according to the first embodiment of the present invention configured as described above will be described.

この熱可塑性材料のプレス成形装置１において所定の寸法形状を有したガラスレンズを光学ガラス素材からプレス成形するには、最初の準備段階で、金型支持部１４により第１の金型部材１２Ａ及び第２の金型部材１２Ｂを所定の離間位置に配置させ、中空部材１８が退避位置に配置され、そして第１の金型部材１２Ａ及び第２の金型部材１２Ｂが酸化温度以下（約２００℃以下）にされている。   In order to press-mold a glass lens having a predetermined size and shape from an optical glass material in the thermoplastic material press-molding apparatus 1, the first mold member 12A and the first mold member 12A and The second mold member 12B is disposed at a predetermined separation position, the hollow member 18 is disposed at the retracted position, and the first mold member 12A and the second mold member 12B are below the oxidation temperature (about 200 ° C.). The following).

具体的には、制御装置３４が金型支持軸駆動機構２８のサーボモータ等の回転力供給源２８ｂの動作を制御し、駆動力伝達部２８ｃ，上下方向移動軸２８ａ，移動案内部２６を介して、第２の金型支持軸１４ｂの上端部に支持されている第２の金型部材１２Ｂを、固定フレーム２４に固定されている第１の金型支持軸１４ａの下端部に支持されている第１の金型部材１２Ａから下方に所定距離離間させる。制御装置３４はまた、中空部材駆動部３０のシリンダ３０ａとピストン３０ｂとの組み合わせの動作を制御して中空部材１８を図１中に示されている加熱位置から上方の退避位置に移動させる。制御装置３４は、外側加熱器２２の動作は停止させ第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの動作のみを制御して第１の金型部材１２Ａ及び第２の金型部材１２Ｂを酸化温度以下（約２００℃以下）の近傍に保つ。制御装置３４は、前述した図示されていない金型面温度分布測定要素を使用して第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度をフィードバック制御することが出来る。   Specifically, the control device 34 controls the operation of the rotational force supply source 28b such as a servo motor of the mold support shaft drive mechanism 28, and the drive force transmission unit 28c, the vertical movement shaft 28a, and the movement guide unit 26 are used. The second mold member 12B supported by the upper end portion of the second mold support shaft 14b is supported by the lower end portion of the first mold support shaft 14a fixed to the fixed frame 24. The first mold member 12A is spaced downward by a predetermined distance. The control device 34 also controls the operation of the combination of the cylinder 30a and the piston 30b of the hollow member drive unit 30 to move the hollow member 18 from the heating position shown in FIG. The control device 34 stops the operation of the outer heater 22 and controls only the operations of the first planar heater 16A and the second planar heater 16B to control the first mold member 12A and the second mold. The mold member 12B is kept near the oxidation temperature or lower (about 200 ° C. or lower). The control device 34 can feedback-control the temperatures of the first mold member 12A and the second mold member 12B using the above-described mold surface temperature distribution measurement element (not shown).

次に、予め前記酸化温度以下にされている所定量の熱可塑性材料１０である光学ガラス素材を図示されていないプレス成形素材搬入機構により前記離間位置の第２の金型部材１２Ｂの金型面に載置し、さらに中空部材１８を加熱位置に戻す。具体的には、制御装置３４が、中空部材駆動部３０のシリンダ３０ａとピストン３０ｂとの組み合わせの動作を制御して中空部材１８を図１中に示されている加熱位置よりも上方の退避位置から図１中に示されている加熱位置に移動させる。   Next, a mold surface of the second mold member 12B at the separated position is pressed by a press molding material carry-in mechanism (not shown) of an optical glass material that is a predetermined amount of the thermoplastic material 10 that is previously set to the oxidation temperature or lower. The hollow member 18 is returned to the heating position. Specifically, the control device 34 controls the operation of the combination of the cylinder 30a and the piston 30b of the hollow member driving unit 30 to move the hollow member 18 above the heating position shown in FIG. To the heating position shown in FIG.

次に、不活性ガス供給部２０が加熱位置の中空部材１８の内部空間を酸化防止環境にしている間に、第１の金型部材１２Ａ及び第２の金型部材１２Ｂを、所定量の熱可塑性材料１０である光学ガラス素材とともに、光学ガラス素材プレス成形可能温度にする。具体的には、制御装置３４が、不活性ガス供給部２０の真空ポンプ２０ａの動作を制御して中空部材１８の内部空間を減圧するとともに不活性ガス供給源２０ｂの動作を制御して前記内部空間を不活性ガスで満たすことにより加熱位置の中空部材１８の内部空間を酸化防止環境にする。その後、制御装置３４は、第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂ及び外側加熱器２２の動作を制御し第１の金型部材１２Ａ及び第２の金型部材１２Ｂの金型面を光学ガラス素材プレス成形可能温度にする。制御装置３４は、前述した図示されていない金型面温度分布測定要素を使用して第１の金型部材１２Ａ及び第２の金型部材１２Ｂの金型面の温度をフィードバック制御することが出来る。   Next, while the inert gas supply unit 20 makes the internal space of the hollow member 18 at the heating position an oxidation-preventing environment, the first mold member 12A and the second mold member 12B are heated to a predetermined amount. Together with the optical glass material that is the plastic material 10, the temperature is set to a temperature at which the optical glass material can be press-molded. Specifically, the control device 34 controls the operation of the vacuum pump 20a of the inert gas supply unit 20 to depressurize the internal space of the hollow member 18 and controls the operation of the inert gas supply source 20b to control the inside. By filling the space with an inert gas, the internal space of the hollow member 18 at the heating position is made an oxidation-preventing environment. Thereafter, the control device 34 controls the operations of the first planar heater 16A, the second planar heater 16B, and the outer heater 22 to control the first mold member 12A and the second mold member 12B. The mold surface is brought to a temperature where the optical glass material can be pressed. The control device 34 can feedback control the temperature of the mold surfaces of the first mold member 12A and the second mold member 12B using the above-described mold surface temperature distribution measurement element (not shown). .

次に、金型支持部１４により第１の金型部材１２Ａ及び第２の金型部材１２Ｂを所定の距離まで接近させて所定量の熱可塑性材料１０である光学ガラス素材をガラスレンズへとプレス成形する。   Next, the first glass member 12A and the second metal mold member 12B are brought close to a predetermined distance by the mold support portion 14, and a predetermined amount of the optical glass material which is the thermoplastic material 10 is pressed into the glass lens. Mold.

この間には、第２の金型固定部材３２Ｂの前述した図示されていない複数の位置決めピンが第１の金型固定部材３２Ａの前述した図示されていない複数の位置決め凹部に嵌合し、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの一対の金型面の所定の相互間位置が確実に維持される。   During this time, the plurality of positioning pins (not shown) of the second mold fixing member 32B are fitted into the plurality of positioning recesses (not shown) of the first mold fixing member 32A. The predetermined mutual position of the pair of mold surfaces of the mold member 12A and the second mold member 12B is reliably maintained.

さらにこの間には、第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂは第２の金型支持軸１４ｂの上端部の第２の金型固定部材３２Ｂの面状加熱体格納凹部３２ｆ及び第１の金型支持軸１４ａの下端部の第１の金型固定部材３２Ａの面状加熱体格納凹部３２ｆ中に配置されているので、第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂには金型支持部１４からのプレス力は負荷されず、第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂが前記プレス力により破損することはない。   Further, during this period, the first planar heating body 16A and the second planar heating body 16B are the planar heating body storage recesses of the second mold fixing member 32B at the upper end of the second mold support shaft 14b. 32f and the first mold support shaft 14a are disposed in the planar heating body storage recess 32f of the first mold fixing member 32A at the lower end of the first mold support shaft 14a, so the first planar heating body 16A and the second planar heating body 16A The planar heating body 16B is not loaded with the pressing force from the mold support portion 14, and the first planar heating body 16A and the second planar heating body 16B are not damaged by the pressing force.

光学ガラス素材をガラスレンズへと精度良くプレス成形するには、光学ガラス素材の粘度の高いガラス屈服点付近で光学ガラス素材にプレス力を加えて大まかな変形加工を行い、その後にガラス屈服点よりもわずかに温度が低く熱膨張係数も小さなガラス転移点付近まで徐々に温度を低下させながら光学ガラス素材にプレス力を加え続けることにより光学ガラス素材にアニーリング効果と金型面の形状の正確な転写とを行う必要がある。   In order to press-mold an optical glass material into a glass lens with high accuracy, a rough deformation process is performed by applying a pressing force to the optical glass material near the glass bending point where the viscosity of the optical glass material is high. Even if the temperature is slightly lower and the coefficient of thermal expansion is small, the annealing effect and the shape of the mold surface are accurately transferred to the optical glass material by continuously applying a pressing force to the optical glass material while gradually lowering the temperature to near the glass transition point. And need to do.

プレス成形中における熱可塑性材料１０である光学ガラス素材、ひいては第１の金型部材１２Ａ及び第２の金型部材１２Ｂの金型面、のこのような精密な温度制御は、外側加熱器２２のみを使用した場合に比べ、第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂを使用したことにより、より容易になっている。   Such precise temperature control of the optical glass material, which is the thermoplastic material 10 during press molding, and thus the mold surfaces of the first mold member 12A and the second mold member 12B, is performed only by the outer heater 22. Compared to the case of using the first planar heating body 16A and the second planar heating body 16B, it is easier.

その後、金型支持部１４により第１の金型部材１２Ａ及び第２の金型部材１２Ｂを前述した所定の離間位置に配置させるとともに第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度が酸化温度以下（約２００℃以下）にされる。   Thereafter, the first mold member 12A and the second mold member 12B are disposed at the predetermined separation positions described above by the mold support portion 14, and the first mold member 12A and the second mold member 12B are disposed. The temperature is set to an oxidation temperature or lower (about 200 ° C. or lower).

具体的には、プレス成形の為の金型支持部１４による第１の金型部材１２Ａ及び第２の金型部材１２Ｂの接近及びプレス成形後の金型支持部１４による第１の金型部材１２Ａ及び第２の金型部材１２Ｂの離間は、制御装置３４が金型支持軸駆動機構２８の回転力供給源２８ｂの動作を制御し、駆動力伝達部２８ｃ，上下方向移動軸２８ａ，移動案内部２６を介して、第２の金型支持軸１４ｂの上端部に支持されている第２の金型部材１２Ｂを、固定フレーム２４に固定されている第１の金型支持軸１４ａの下端部に支持されている第１の金型部材１２Ａに所定距離まで接近させ、その後に第１の金型部材１２Ａから下方に所定距離離間させることにより行われる。   Specifically, the first mold member by the mold support portion 14 after press molding and the approach of the first mold member 12A and the second mold member 12B by the mold support portion 14 for press molding. The controller 34 controls the operation of the rotational force supply source 28b of the mold support shaft drive mechanism 28 to separate the 12A and the second mold member 12B, and the drive force transmission unit 28c, the vertical movement shaft 28a, the movement guide. The second mold member 12B supported on the upper end of the second mold support shaft 14b via the portion 26 is connected to the lower end of the first mold support shaft 14a fixed to the fixed frame 24. The first mold member 12A supported by the first mold member 12A is brought close to a predetermined distance, and thereafter, the first mold member 12A is moved downward by a predetermined distance from the first mold member 12A.

第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度の酸化温度以下への低下は、制御装置３４が不活性ガス供給源２０ｂの動作を制御して、第１の金型固定部材３２Ａ及び第２の金型固定部材３２Ｂの夫々において、第１の金型部材１２Ａ又は第２の金型部材１２Ｂが固定された第１固定部材３２ｄ及び第２固定部材３２ｅの少なくとも一方を選択的に冷却させる冷却部ＣＳの前述した複数の冷却媒体通路に冷却媒体としての不活性ガスを流すことにより促進させることが出来る。   When the temperature of the first mold member 12A and the second mold member 12B is lowered to the oxidation temperature or lower, the control device 34 controls the operation of the inert gas supply source 20b, and the first mold fixing member In each of the 32A and the second mold fixing member 32B, at least one of the first fixing member 32d and the second fixing member 32e to which the first mold member 12A or the second mold member 12B is fixed is selectively used. This can be promoted by flowing an inert gas as a cooling medium through the plurality of cooling medium passages of the cooling part CS to be cooled.

第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度の酸化温度以下への低下の後に、中空部材１８が図１中に示されている加熱位置から上方の退避位置へと移動される。そしてその後に、第２の金型部材１２Ｂの金型面上のプレス成形物、この実施形態ではガラスレンズ、が、図示されていないプレス成形物搬出機構により前記離間位置の第２の金型部材１２Ｂの金型面から搬出される。   After the temperature of the first mold member 12A and the second mold member 12B is lowered to the oxidation temperature or less, the hollow member 18 is moved from the heating position shown in FIG. 1 to the upper retracted position. The Then, after that, the press-molded product on the mold surface of the second mold member 12B, in this embodiment, the glass lens, is moved to the second mold member in the separated position by a press-molded product unloading mechanism (not shown). It is carried out from the mold surface of 12B.

その後、次のプレス成形加工が繰り返される。
この実施形態においては、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度の酸化温度以下（約２００℃）から熱可塑性材料プレス成形可能温度、即ち光学ガラス素材プレス成形可能温度、への上昇が、夫々が所望の発熱パターンを有する第１の面状加熱体１６Ａ，第２の面状加熱体１６Ｂ及び外側加熱器２２の組み合わせにより行われるので、外側加熱器のみにより行われる従来に比べると、より早くより正確な所望の温度分布にすることが出来る。このことは、１回のプレス成形加工サイクルに要する時間を、前記従来に比べ短くすることが出来ることを意味し、しかもプレス成形精度も向上させることが出来ることを意味している。 Thereafter, the next press molding process is repeated.
In this embodiment, the temperature at which the thermoplastic material can be pressed from the oxidation temperature of the first mold member 12A and the second mold member 12B (about 200 ° C.) or lower, that is, the optical glass material press-moldable temperature, Is increased by the combination of the first planar heater 16A, the second planar heater 16B, and the outer heater 22 each having a desired heat generation pattern, and thus is performed only by the outer heater. Compared to, it is possible to obtain a desired temperature distribution more quickly and accurately. This means that the time required for one press molding process cycle can be shortened as compared with the conventional one, and the press molding accuracy can be improved.

しかも、第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂを使用することで、外側加熱器のみを使用した従来では正確な所望の温度分布にすることが困難であった複雑な形状の金型面を有する金型部材や比較的大きな寸法の金型面を有する金型部材であっても、早く正確な所望の温度分布にすることが出来る。   In addition, by using the first planar heating body 16A and the second planar heating body 16B, it is difficult to achieve an accurate desired temperature distribution in the prior art using only the outer heater. Even a mold member having a shaped mold surface or a mold member having a relatively large size mold surface can quickly and accurately have a desired temperature distribution.

なお第１の金型部材１２Ａ及び第２の金型部材１２Ｂの寸法が小さくなれば、外側加熱器２２を省略し、第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの組み合わせ又は第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの少なくとも一方のみでも、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度、特にこれらの金型面の温度、を、外側加熱器のみを使用した従来に比べると、より早くより正確な所望の温度分布にすることが出来る。   If the dimensions of the first mold member 12A and the second mold member 12B are reduced, the outer heater 22 is omitted, and the combination of the first planar heater 16A and the second planar heater 16B. Alternatively, the temperature of the first mold member 12A and the second mold member 12B, particularly the temperature of these mold surfaces, can be obtained only by at least one of the first planar heater 16A and the second planar heater 16B. Compared to the conventional method using only the outer heater, the desired temperature distribution can be obtained more quickly and accurately.

さらにこの実施形態においては、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度の熱可塑性材料プレス成形可能温度、即ち光学ガラス素材プレス成形可能温度、から酸化温度以下への低下を、第１の金型固定部材３２Ａ及び第２の金型固定部材３２Ｂにおいて、第１の金型部材１２Ａ又は第２の金型部材１２Ｂが固定された第１固定部材３２ｄ及び第１固定部材３２ｄに隣接した第２固定部材３２ｅの少なくとも一方を選択的に冷却させる冷却部ＣＳを使用して行うことが出来るので、冷却部ＣＳを使用しない従来に比べ、より確実に早く行なわせることが出来る。このことは、１回のプレス成形加工サイクルに要する時間を、前記従来に比べ短くすることが出来ることを意味している。   Further, in this embodiment, the temperature of the first mold member 12A and the second mold member 12B is reduced from the thermoplastic material press-moldable temperature, that is, the optical glass material press-moldable temperature, to the oxidation temperature or lower. In the first mold fixing member 32A and the second mold fixing member 32B, the first fixing member 32d and the first fixing member 32d to which the first mold member 12A or the second mold member 12B are fixed. Since it can be performed using the cooling part CS that selectively cools at least one of the second fixing members 32e adjacent to the second fixing member 32e, it can be performed more reliably and quickly than in the conventional case where the cooling part CS is not used. This means that the time required for one press molding process cycle can be shortened compared to the conventional case.

図５には、本願の発明の第１実施形態に従った熱可塑性材料のプレス成形装置１において、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を外側加熱器２２のみを使用して加熱した場合における加熱時間に対する第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々の外周部温度ＰＴの上昇及び中心部温度ＣＴの上昇の様子が示されている。   FIG. 5 shows only the outer heater 22 for each of the first mold member 12A and the second mold member 12B in the thermoplastic material press molding apparatus 1 according to the first embodiment of the present invention. The state of the rise in the outer peripheral temperature PT and the rise in the center temperature CT of the first mold member 12A and the second mold member 12B with respect to the heating time when used and heated is shown.

図６には、本願の発明の第１実施形態に従った熱可塑性材料のプレス成形装置１において、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を外側加熱器２２，第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの夫々の組み合わせを使用して加熱した場合における加熱時間に対する第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々の外周部温度ＰＴの上昇及び中心部温度ＣＴの上昇の様子が示されている。   FIG. 6 shows an outer heater 22 and a second mold member 12B for the first mold member 12A and the second mold member 12B, respectively, in the thermoplastic material press molding apparatus 1 according to the first embodiment of the present invention. The outer peripheries of the first mold member 12A and the second mold member 12B with respect to the heating time when heating is performed using the combination of the first planar heating body 16A and the second planar heating body 16B. The state of the rise of the part temperature PT and the rise of the center part temperature CT is shown.

図７には、本願の発明の第１実施形態に従った熱可塑性材料のプレス成形装置１において、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの夫々のみを使用して加熱した場合における加熱時間に対する第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々の外周部温度ＰＴの上昇及び中心部温度ＣＴの上昇の様子が示されている。   FIG. 7 shows the first planar heating of the first mold member 12A and the second mold member 12B in the thermoplastic material press molding apparatus 1 according to the first embodiment of the present invention. The rise in the outer peripheral temperature PT of each of the first mold member 12A and the second mold member 12B with respect to the heating time when only the body 16A and the second planar heating body 16B are used for heating, and The state of the rise of the center temperature CT is shown.

例えば第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々は超硬合金又はタングステン合金により１１０ｍｍの直径を有し、８０ｍｍの外径及び最大２０ｍｍの厚さのメニスカスレンズをプレス成形可能に形成されていて、成形条件の一例として、以下の光学ガラス素材を使用して、以下のプレス成形条件で前記メニスカスレンズをプレス成形した。   For example, each of the first mold member 12A and the second mold member 12B has a diameter of 110 mm made of cemented carbide or tungsten alloy, and can press-mold a meniscus lens having an outer diameter of 80 mm and a maximum thickness of 20 mm. As an example of molding conditions, the meniscus lens was press molded under the following press molding conditions using the following optical glass material.

光学ガラス素材は、次の特性を持ったものを使用した。
・屈折率：１．５８３１３
・転移点：５０６℃
・屈服点：５３８℃
・軟化点：６０７℃ An optical glass material having the following characteristics was used.
-Refractive index: 1.58313
・ Transition point: 506 ℃
・ Crown point: 538 ℃
Softening point: 607 ° C

プレス成形条件は、以下の条件で行った。
・成形温度：５８０℃
・プレス力：２５ｋＮ
・プレス時間：約６０秒 The press molding conditions were as follows.
-Molding temperature: 580 ° C
・ Pressing force: 25kN
・ Press time: Approximately 60 seconds

そして、図５の場合は、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を外側加熱器２２のみを使用して加熱したので、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々は外周部が中心部よりも先に加熱されて先に昇温し、外周部温度ＰＴが成形温度の５８０℃に到達した後にこの温度に安定するよう外側加熱器２２の出力を調節した。しかしながら、中心部温度ＣＴは成形温度の５８０℃には到達せず、成形温度よりも若干低い５７２℃で安定した。このように加熱された第１の金型部材１２Ａ及び第２の金型部材１２Ｂにより前記プレス条件で前記光学ガラス素材をプレス成形した結果得られたガラスレンズは、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々における外周部温度ＰＴと中心部温度ＣＴとの差の結果として、所望の寸法精度を得ることが出来なかった。   In the case of FIG. 5, since each of the first mold member 12A and the second mold member 12B is heated using only the outer heater 22, the first mold member 12A and the second mold member 12B are heated. Each of the mold members 12B has its outer peripheral portion heated before the central portion and heated first, and after the outer peripheral portion temperature PT has reached the molding temperature of 580 ° C., the outer heater 22 is stabilized. The output was adjusted. However, the center temperature CT did not reach the molding temperature of 580 ° C. and stabilized at 572 ° C., which is slightly lower than the molding temperature. The glass lens obtained as a result of press-molding the optical glass material under the pressing conditions by the first mold member 12A and the second mold member 12B heated in this way is the first mold member 12A and the second mold member 12B. As a result of the difference between the outer peripheral temperature PT and the central temperature CT in each of the second mold members 12B, the desired dimensional accuracy could not be obtained.

図６の場合は、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を外側加熱器２２，第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの夫々の組み合わせを使用して加熱したので、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々の外周部と中心部とが、図５の場合に比べ、速やかに昇温し、外周部温度ＰＴが成形温度の５８０℃に到達した直後に中心部温度ＣＴも成形温度の５８０℃に到達し、外周部温度ＰＴ及び中心部温度ＣＴが成形温度に安定するよう外側加熱器２２，第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの夫々の出力を調節した。このように加熱された第１の金型部材１２Ａ及び第２の金型部材１２Ｂにより前記プレス条件で前記光学ガラス素材をプレス成形した結果得られたガラスレンズは、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々における外周部温度ＰＴと中心部温度ＣＴとの差が無かった結果として、所望の寸法精度を得ることが出来た。   In the case of FIG. 6, the first mold member 12A and the second mold member 12B are each combined with the outer heater 22, the first planar heater 16A, and the second planar heater 16B. The first and second mold members 12 </ b> A and 12 </ b> B have their outer peripheral portions and the central portion heated up more quickly than in the case of FIG. Immediately after PT reaches the molding temperature of 580 ° C., the center temperature CT also reaches the molding temperature of 580 ° C., and the outer heater 22, the first heater is set so that the outer peripheral temperature PT and the center temperature CT are stabilized at the molding temperature. The outputs of the planar heating body 16A and the second planar heating body 16B were adjusted. The glass lens obtained as a result of press-molding the optical glass material under the pressing conditions by the first mold member 12A and the second mold member 12B heated in this way is the first mold member 12A and the second mold member 12B. As a result of no difference between the outer peripheral temperature PT and the central temperature CT in each of the second mold members 12B, desired dimensional accuracy could be obtained.

図７の場合は、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの夫々のみを使用して加熱したので、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々の外周部と中心部とが、図６の場合に比べ、緩やかに昇温し、中心部温度ＣＴが成形温度の５８０℃に先に到達した直後に外周部温度ＰＴも成形温度の５８０℃に到達し、外周部温度ＰＴ及び中心部温度ＣＴが成形温度に安定するよう第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの夫々の出力を調節した。このように加熱された第１の金型部材１２Ａ及び第２の金型部材１２Ｂにより前記プレス条件で前記光学ガラス素材をプレス成形した結果得られたガラスレンズは、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々における外周部温度ＰＴと中心部温度ＣＴとの差が無かった結果として、所望の寸法精度を得ることが出来た。即ち、図７の場合は、図６の場合に比べて時間はかかるものの、所望の寸法精度のガラスレンズを得ることが出来た。   In the case of FIG. 7, each of the first mold member 12A and the second mold member 12B is heated using only the first planar heating body 16A and the second planar heating body 16B. Therefore, the outer peripheral portion and the central portion of each of the first mold member 12A and the second mold member 12B gradually rise in temperature compared to the case of FIG. 6, and the central temperature CT is 580, which is the molding temperature. Immediately after reaching first, the outer peripheral temperature PT also reaches the molding temperature of 580 ° C., so that the outer peripheral temperature PT and the central temperature CT are stabilized at the molding temperature. Each output of the planar heating element 16B was adjusted. The glass lens obtained as a result of press-molding the optical glass material under the pressing conditions by the first mold member 12A and the second mold member 12B heated in this way is the first mold member 12A and the second mold member 12B. As a result of no difference between the outer peripheral temperature PT and the central temperature CT in each of the second mold members 12B, desired dimensional accuracy could be obtained. That is, in the case of FIG. 7, although it takes more time than the case of FIG. 6, a glass lens with a desired dimensional accuracy could be obtained.

さらに、前述した第１実施形態に従った熱可塑性材料のプレス成形装置１では、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々の金型面の全面に渡る温度分布を第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの夫々の発熱特性を調節することにより任意に変更することが可能である。また前述した図示されていない金型面温度分布測定要素を第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々の外周部、中心部、及び、外周部と中心部の中間に配置することにより、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々の金型面の温度をより精密に制御できるようになる。従って、外側加熱器２２のみを使用した従来の熱可塑性材料のプレス成形装置では所望の寸法精度にプレス成形することが出来なかった直径８０ｍｍを超えるような大きなガラスレンズや１つの金型部材に複数の金型面が形成されている場合でも、これら従来よりも大きなガラスレンズのプレス成形や複数の金型面による複数のガラスレンズ等の複数の光学素子のプレス成形を所望の寸法精度で行うことが出来る。   Furthermore, in the thermoplastic material press molding apparatus 1 according to the first embodiment described above, the temperature distribution over the entire mold surface of each of the first mold member 12A and the second mold member 12B is changed to the first. It can be arbitrarily changed by adjusting the heat generation characteristics of the first planar heater 16A and the second planar heater 16B. In addition, the above-described mold surface temperature distribution measuring element (not shown) is arranged at the outer periphery, the center, and between the outer periphery and the center of each of the first mold member 12A and the second mold member 12B. By doing so, it becomes possible to more precisely control the temperature of the respective mold surfaces of the first mold member 12A and the second mold member 12B. Therefore, the conventional thermoplastic material press-molding apparatus using only the outer heater 22 cannot be press-molded with a desired dimensional accuracy. Even when the mold surface is formed, press molding of a glass lens larger than the conventional one or press molding of a plurality of optical elements such as a plurality of glass lenses by a plurality of mold surfaces is performed with a desired dimensional accuracy. I can do it.

［第２実施形態］
次に、図８及び図９を参照しながら、この発明の第２実施形態に従った熱可塑性材料のプレス成形装置１０１を説明する。 [Second Embodiment]
Next, a press molding apparatus 101 for a thermoplastic material according to a second embodiment of the present invention will be described with reference to FIGS.

第２実施形態に従った熱可塑性材料のプレス成形装置１０１の構成の大部分は、図１乃至図４中に示されていた第１実施形態に従った熱可塑性材料のプレス成形装置１の構成と同じである。従って、第２実施形態に従った熱可塑性材料のプレス成形装置１０１において第１実施形態に従った熱可塑性材料のプレス成形装置１の構成部材と同じ構成部材には、第１実施形態に従った熱可塑性材料のプレス成形装置１の構成部材に添付されている参照符号と同じ参照符号を付してそれ等の構成部材についての詳細な説明は省略する。   Most of the configuration of the thermoplastic material press molding apparatus 101 according to the second embodiment is the configuration of the thermoplastic material press molding apparatus 1 according to the first embodiment shown in FIGS. Is the same. Accordingly, in the thermoplastic material press molding apparatus 101 according to the second embodiment, the same constituent members as those of the thermoplastic material press molding apparatus 1 according to the first embodiment conform to the first embodiment. The same reference numerals as those attached to the constituent members of the thermoplastic material press-molding apparatus 1 are given the same reference numerals, and detailed descriptions thereof are omitted.

第２実施形態に従った熱可塑性材料のプレス成形装置１０１は、気密に構成されたハウジング５０の内部空間に、第１実施形態に従った熱可塑性材料のプレス成形装置１とは上下逆さまに格納され固定されている。   The thermoplastic material press-molding apparatus 101 according to the second embodiment is stored upside down with the thermoplastic material press-molding apparatus 1 according to the first embodiment in the interior space of the airtightly configured housing 50. It is fixed.

気密なハウジング５０の前記内部空間において、この実施形態における金型支持部１４の下側の第１の金型支持軸１４ａの上端部及び上側の第２の金型支持軸１４ｂの下端部に支持されている下側の第１の金型部材１２Ａ及び上側の第２の金型部材１２Ｂの水平方向における両側には、中空部材１８よりも外側に、プレス成形素材搬入機構５２及びプレス成形物搬出機構５４が配置されている。   In the internal space of the airtight housing 50, the upper end of the first mold support shaft 14a on the lower side of the mold support portion 14 and the lower end of the second mold support shaft 14b on the upper side are supported in this embodiment. On both sides in the horizontal direction of the lower first mold member 12A and the upper second mold member 12B, the press-molding material carry-in mechanism 52 and the press-molded product are carried out outside the hollow member 18. A mechanism 54 is arranged.

ハウジング５０において、中空部材１８から遠いプレス成形素材搬入機構５２の外端部に対応した位置にはプレス成形素材搬入開口ＩＯが形成されていて、ハウジング５０の内部空間にはプレス成形素材搬入開口ＩＯとプレス成形素材搬入機構５２の外端部との間で移動可能なプレス成形素材搬入部材５６Ａが設けられている。ハウジング５０の外部空間においてプレス成形素材搬入開口ＩＯに対応した位置には、プレス成形素材搬入部材５６Ａの移動に連携してプレス成形素材搬入開口ＩＯを開閉させるプレス成形素材搬入開口開閉部材５８Ａが設けられている。   In the housing 50, a press molding material loading opening IO is formed at a position corresponding to the outer end portion of the press molding material loading mechanism 52 far from the hollow member 18, and the press molding material loading opening IO is formed in the internal space of the housing 50. And a press-molding material carry-in member 56 </ b> A that is movable between the outer end portion of the press-molding material carry-in mechanism 52. A press molding material carry-in opening / closing member 58A that opens and closes the press molding material carry-in opening IO in cooperation with the movement of the press molding material carry-in member 56A is provided in a position corresponding to the press molding material carry-in opening IO in the outer space of the housing 50. It has been.

プレス成形素材搬入開口ＩＯに配置されているプレス成形素材搬入部材５６Ａはプレス成形素材搬入開口ＩＯを気密に閉じ、この間にプレス成形素材搬入開口開閉部材５８Ａは開位置に配置されていて、この間にプレス成形素材搬入部材５６Ａは熱可塑性材料１０のプレス成形素材、この実施形態では光学ガラス素材、を受け入れる。この後、プレス成形素材搬入開口開閉部材５８Ａが閉位置に配置されプレス成形素材搬入開口ＩＯを気密に閉じると、プレス成形素材搬入部材５６Ａはプレス成形素材搬入開口ＩＯから離れ、プレス成形素材搬入機構５２の外端部に接近し、前記受け入れた熱可塑性材料１０のプレス成形素材、この実施形態では光学ガラス素材、を前記内部空間においてプレス成形素材搬入機構５２の外端部により取り出される。プレス成形素材搬入部材５６Ａ，プレス成形素材搬入開口開閉部材５８Ａ，そしてプレス成形素材搬入機構５２の動作は制御装置３４により制御される。   The press-molding material carry-in member 56A arranged in the press-molding material carry-in opening IO closes the press-molding material carry-in opening IO in an airtight manner, and the press-molding material carry-in opening opening / closing member 58A is arranged in the open position during this time. The press-molding material carrying member 56A receives a press-molding material of the thermoplastic material 10, which is an optical glass material in this embodiment. Thereafter, when the press-molding material carry-in opening / closing member 58A is disposed at the closed position and the press-molding material carry-in opening IO is airtightly closed, the press-molding material carry-in member 56A moves away from the press-molding material carry-in opening IO, and the press-molding material carry-in mechanism The outer end portion of 52 is approached, and the received press-molding material of the thermoplastic material 10, in this embodiment, the optical glass material, is taken out by the outer end portion of the press-molding material carry-in mechanism 52 in the inner space. Operations of the press-molding material carry-in member 56A, the press-molding material carry-in opening / closing member 58A, and the press-molding material carry-in mechanism 52 are controlled by the control device 34.

ハウジング５０において、中空部材１８から遠いプレス成形物搬出機構５４の外端部に対応した位置には、プレス成形物搬出開口ＤＯが形成されていて、ハウジング５０の内部空間にはプレス成形物搬出開口ＤＯとプレス成形物搬出機構５４の外端部との間で移動可能なプレス成形物搬出部材５６Ｂが設けられている。ハウジング５０の外部空間においてプレス成形物搬出開口ＤＯに対応した位置には、プレス成形物搬出部材５６Ｂの移動に連携してプレス成形物搬出開口ＤＯを開閉させるプレス成形物搬出開口開閉部材５８Ｂが設けられている。   In the housing 50, a press molded product unloading opening DO is formed at a position corresponding to the outer end portion of the press molded product unloading mechanism 54 far from the hollow member 18, and the press molded product unloading opening is formed in the internal space of the housing 50. A press-molded product carry-out member 56B that is movable between the DO and the outer end portion of the press-molded product carry-out mechanism 54 is provided. A press molded product unloading opening / closing member 58B for opening and closing the press molded product unloading opening DO in cooperation with the movement of the press molded product unloading member 56B is provided at a position corresponding to the press molded product unloading opening DO in the outer space of the housing 50. It has been.

プレス成形物搬出機構５４の外端部にプレス成形物搬出部材５６Ｂが接近している間にプレス成形物搬出開口開閉部材５８Ｂは閉位置に配置されていてプレス成形物搬出開口ＤＯを気密に閉じている。この間にプレス成形物搬出部材５６Ｂはプレス成形物搬出機構５４の外端部からプレス成形物Ｇ、この実施形態では光学素子の一種であるガラスレンズ、を受け入れる。この後、プレス成形物搬出開口開閉部材５８Ｂが閉位置に配置されている間に、プレス成形物搬出部材５６Ｂはプレス成形物搬出機構５４の外端部から離れプレス成形物搬出開口ＤＯに接近しプレス成形物搬出開口ＤＯを気密に閉じる。プレス成形物搬出部材５６Ｂがプレス成形物搬出開口ＤＯを気密に閉じている間に、プレス成形物搬出開口開閉部材５８Ｂが開位置に配置される。この間に、プレス成形物搬出部材５６Ｂから、前記内部空間において受け入れたプレス成形物Ｇ、この実施形態では光学素子の一種であるガラスレンズ、が取り出される。プレス成形物搬出部材５６Ｂ，プレス成形物搬出開口開閉部材５８Ｂ，そしてプレス成形物搬出機構５４の動作も制御装置３４により制御される。   While the press-molded product unloading member 56B approaches the outer end of the press-molded product unloading mechanism 54, the press-molded product unloading opening / closing member 58B is disposed at the closed position, and the press-molded product unloading opening DO is closed in an airtight manner. ing. During this time, the press-molded product unloading member 56B receives the press-molded product G from the outer end portion of the press-molded product unloading mechanism 54, in this embodiment, a glass lens which is a kind of optical element. Thereafter, while the press-molded product unloading opening / closing member 58B is disposed at the closed position, the press-molded product unloading member 56B moves away from the outer end of the press-molded product unloading mechanism 54 and approaches the press-molded product unloading opening DO. The press-molded product discharge opening DO is closed in an airtight manner. While the press-molded product carry-out member 56B closes the press-molded product carry-out opening DO in an airtight manner, the press-molded product carry-out opening / closing member 58B is arranged at the open position. In the meantime, the press-molded product G received in the internal space, that is, a glass lens which is a kind of optical element in this embodiment, is taken out from the press-molded product carry-out member 56B. The operations of the press molded product carry-out member 56B, the press molded product carry-out opening / closing member 58B, and the press molded product carry-out mechanism 54 are also controlled by the control device 34.

ハウジング５０の前記内部空間は、不活性ガス供給部２０の真空ポンプ２０ａ及び不活性ガス供給源２０ｂに接続されていて、真空ポンプ２０ａにより前記内部空間中の空気が吸い出される間に不活性ガス供給源２０ｂからの不活性ガスにより満たされる。従って、この実施形態では、不活性ガス供給源２０ｂは中空部材１８が加熱位置に配置されている間に中空部材１８の内部空間に不活性ガスを供給して不活性ガスで満たす必要がない。   The inner space of the housing 50 is connected to a vacuum pump 20a and an inert gas supply source 20b of the inert gas supply unit 20, and the inert gas is sucked out while air in the inner space is sucked out by the vacuum pump 20a. Filled with inert gas from source 20b. Therefore, in this embodiment, it is not necessary for the inert gas supply source 20b to supply the inert gas to the internal space of the hollow member 18 and fill it with the inert gas while the hollow member 18 is disposed at the heating position.

気密のハウジング５０の内部空間に前述した如く格納されている第２実施形態に従った熱可塑性材料のプレス成形装置１０１においては、プレス成形素材搬入開口ＩＯを介して所定の量の熱可塑性材料１０のプレス成形素材、この実施形態では光学ガラス素材、が気密のハウジング５０の内部空間に搬入される間に、プレス成形素材搬入開口ＩＯはプレス成形素材搬入部材５６Ａ又はプレス成形素材搬入開口開閉部材５８Ａにより気密に閉じられている。また、プレス成形物搬出開口ＤＯを介してプレス成形物Ｇ、この実施形態ではガラスレンズ、が気密のハウジング５０の内部空間から搬出される間にプレス成形物搬出開口ＤＯは、プレス成形物搬出部材５６Ｂ又はプレス成形物搬出開口開閉部材５８Ｂにより気密に閉じられている。   In the thermoplastic material press molding apparatus 101 according to the second embodiment stored in the internal space of the airtight housing 50 as described above, a predetermined amount of the thermoplastic material 10 is passed through the press molding material carry-in opening IO. While the press molding material, in this embodiment, the optical glass material, is carried into the internal space of the airtight housing 50, the press molding material carry-in opening IO is a press-molding material carry-in member 56A or a press-molding material carry-in opening / closing member 58A. Is more airtight. Further, the press molded product unloading opening DO is a press molded product unloading member while the press molded product G, in this embodiment, the glass lens, is unloaded from the internal space of the airtight housing 50 through the press molded product unloaded opening DO. 56B or a press-molded product unloading opening / closing member 58B is hermetically closed.

プレス成形素材搬入機構５２には図示されていない加熱器が設けられていて、プレス成形素材搬入機構５２が前記外端部から熱可塑性材料１０のプレス成形素材、この実施形態では光学ガラス素材、を中空部材１８の近傍まで搬送する間に前記加熱器により所望の温度、例えばプレス成形可能温度、まで加熱することが出来る。気密のハウジング５０の内部空間には前述した如く不活性ガスで満たされているので、このように加熱された熱可塑性材料１０のプレス成形素材、この実施形態では光学ガラス素材は、酸化しない。   The press-molding material carry-in mechanism 52 is provided with a heater (not shown), and the press-molding material carry-in mechanism 52 receives a press-molded material of the thermoplastic material 10 from the outer end, in this embodiment, an optical glass material. While being conveyed to the vicinity of the hollow member 18, the heater can heat to a desired temperature, for example, a press moldable temperature. Since the internal space of the airtight housing 50 is filled with the inert gas as described above, the press-molded material of the thermoplastic material 10 thus heated, in this embodiment, the optical glass material is not oxidized.

第２実施形態に従った熱可塑性材料のプレス成形装置１０１の第１の金型部材１２Ａ及び第２の金型部材１２Ｂは離間位置に配置されている間に、対応する第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂ及び加熱位置の中空部材１０の外側加熱器２２によりプレス成形可能温度に既に加熱されている。そして、プレス成形素材搬入機構５２が前記外端部から熱可塑性材料１０のプレス成形素材、この実施形態では光学ガラス素材、を加熱しながら中空部材１８の近傍まで搬送する間に、第２実施形態に従った熱可塑性材料のプレス成形装置１０１の中空部材１８が加熱位置から退避位置に移動されている。   While the first mold member 12A and the second mold member 12B of the thermoplastic material press molding apparatus 101 according to the second embodiment are disposed at the separated positions, the corresponding first planar heating is performed. The body 16A, the second planar heating body 16B, and the outer heater 22 of the hollow member 10 at the heating position have already been heated to a press-moldable temperature. While the press-molding material carrying mechanism 52 conveys the press-molded material of the thermoplastic material 10 from the outer end portion, in this embodiment, the optical glass material, to the vicinity of the hollow member 18 while heating, the second embodiment. The hollow member 18 of the thermoplastic material press molding apparatus 101 is moved from the heating position to the retracted position.

中空部材１８が退避位置に移動しても気密のハウジング５０の内部空間は前述した如く不活性ガスで満たされているので、前述した如くプレス成形可能温度に既に加熱されていた退避位置の第１の金型部材１２Ａ及び第２の金型部材１２Ｂは酸化しない。   Even if the hollow member 18 is moved to the retracted position, the inner space of the airtight housing 50 is filled with the inert gas as described above. Therefore, as described above, the first position at the retracted position that has already been heated to the press-moldable temperature. The mold member 12A and the second mold member 12B are not oxidized.

中空部材１８が外側加熱器２２を伴い加熱位置から退避位置に移動されることにより、外側加熱器２２が第１の金型部材１２Ａ及び第２の金型部材１２Ｂから遠ざかり、その結果として前記離間位置の第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度は僅かに低下する。しかしながら、離間位置の第１の金型部材１２Ａの金型面にプレス成形素材搬入機構５２から前述した如く所望の温度、例えばプレス成形可能温度、まで予め加熱されている熱可塑性材料１０のプレス成形素材、この実施形態では光学ガラス素材、が載置された後に、中空部材１８が外側加熱器２２を伴い退避位置から加熱位置に戻ると、速やかに、離間位置の第１の金型部材１２Ａ及び第２の金型部材１２Ｂを熱可塑性材料１０のプレス成形素材、この実施形態では光学ガラス素材、とともにプレス成形可能温度に戻すことが出来る。   When the hollow member 18 is moved from the heating position to the retracted position with the outer heater 22, the outer heater 22 moves away from the first mold member 12A and the second mold member 12B, and as a result, the separation is performed. The temperature of the first mold member 12A and the second mold member 12B at the position slightly decreases. However, the press molding of the thermoplastic material 10 that has been preheated from the press molding material carry-in mechanism 52 to a desired temperature, for example, a press moldable temperature, on the mold surface of the first mold member 12A in the separated position as described above. After the material, in this embodiment the optical glass material, is placed, when the hollow member 18 returns from the retracted position to the heating position with the outer heater 22, the first mold member 12A and The second mold member 12B can be returned to the press-moldable temperature together with the press-molding material of the thermoplastic material 10, which is the optical glass material in this embodiment.

中空部材１８が加熱位置に戻り、離間位置の第１の金型部材１２Ａ及び第２の金型部材１２Ｂが熱可塑性材料１０のプレス成形素材、この実施形態では光学ガラス素材、とともにプレス成形可能温度に戻された後、第１の金型部材１２Ａ及び第２の金型部材１２Ｂは金型支持部１４により相互に接近され熱可塑性材料１０のプレス成形素材、この実施形態では光学ガラス素材、からプレス成形物Ｇ、この実施形態ではガラスレンズ、をプレス成形する。   The hollow member 18 returns to the heating position, and the first mold member 12A and the second mold member 12B at the separated positions are the press-molding material of the thermoplastic material 10, in this embodiment, the optical glass material, and the press-moldable temperature. After being returned to the first mold member 12A and the second mold member 12B are brought close to each other by the mold support portion 14 and the press molding material of the thermoplastic material 10, in this embodiment, the optical glass material. A press-molded product G, in this embodiment, a glass lens, is press-molded.

この後、第１の金型部材１２Ａ及び第２の金型部材１２Ｂが前述した離間位置に戻されるとともに中空部材１８が前述した退避位置に戻され、離間位置の第１の金型部材１２Ａの金型面からプレス成形物Ｇ、この実施形態ではガラスレンズ、がプレス成形物搬出機構５４により搬出される。   Thereafter, the first mold member 12A and the second mold member 12B are returned to the above-described separated position, and the hollow member 18 is returned to the above-described retracted position, and the first mold member 12A at the separated position is returned. The press-molded product G, in this embodiment, the glass lens, is unloaded from the mold surface by the press-molded product unloading mechanism 54.

プレス成形物Ｇ、この実施形態ではガラスレンズ、は、プレス成形物搬出機構５４によりプレス成形物搬出機構５４の外端部まで搬送される間に前述したプレス成形可能温度から温度が低下し、プレス成形物搬出機構５４の外端部においてプレス成形物搬出部材５６Ｂに受け入れられる。   The press-molded product G, in this embodiment the glass lens, decreases in temperature from the aforementioned press-moldable temperature while being conveyed by the press-molded product unloading mechanism 54 to the outer end of the press-molded product unloading mechanism 54. The molded product carry-out mechanism 54 receives the press-molded product carry-out member 56B at the outer end portion thereof.

この後、プレス成形物搬出部材５６Ｂはプレス成形物搬出機構５４の外端部からプレス成形物搬出開口ＤＯに移動し、さらにプレス成形物搬出開口開閉部材５８Ｂが開かれることによりプレス成形物搬出部材５６Ｂからのプレス成形物Ｇ、この実施形態ではガラスレンズ、の取り出しが行われる。   Thereafter, the press-molded product unloading member 56B is moved from the outer end portion of the press-molded product unloading mechanism 54 to the press-molded product unloading opening DO, and the press-molded product unloading opening / closing member 58B is opened, whereby the press-molded product unloading member 56B is opened. The press-molded product G from 56B, in this embodiment, the glass lens is removed.

第２実施形態に従った熱可塑性材料のプレス成形装置１０１は、不活性ガスにより常に満たされている気密のハウジング５０の内部空間中に固定されているので、プレス成形素材、この実施形態では光学ガラス素材、からプレス成形物Ｇ、この実施形態ではガラスレンズ、を第１の金型部材１２Ａ及び第２の金型部材１２Ｂによりプレス成形する為に中空部材１８を加熱位置と退避位置との間で移動させる度に第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度を酸化温度以下とプレス成形可能温度との間で変動させる必要がない。この為に、第２実施形態に従った熱可塑性材料のプレス成形装置１０１において１回のプレス成形に要するサイクルタイムは、前述した第１実施形態に従った熱可塑性材料のプレス成形装置１において１回のプレス成形に要するサイクルタイムよりもかなり短縮される。   The thermoplastic material press molding apparatus 101 according to the second embodiment is fixed in the inner space of the hermetic housing 50 that is always filled with an inert gas. In order to press-mold the glass material from the press-molded product G, in this embodiment the glass lens, with the first mold member 12A and the second mold member 12B, the hollow member 18 is placed between the heating position and the retracted position. It is not necessary to change the temperature of the first mold member 12A and the second mold member 12B between the oxidation temperature or lower and the press-moldable temperature each time they are moved. For this reason, the cycle time required for one press molding in the thermoplastic material press molding apparatus 101 according to the second embodiment is 1 in the thermoplastic material press molding apparatus 1 according to the first embodiment described above. This is considerably shorter than the cycle time required for one press forming.

なぜならば、前述した第１実施形態に従った熱可塑性材料のプレス成形装置１においては、プレス成形素材、この実施形態では光学ガラス素材、からプレス成形物、この実施形態ではガラスレンズ、を第１の金型部材１２Ａ及び第２の金型部材１２Ｂによりプレス成形する為に中空部材１８を加熱位置と退避位置との間で移動させる度に第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度を酸化温度以下とプレス成形可能温度との間で変動させる必要があるからである。   This is because, in the thermoplastic material press-molding apparatus 1 according to the first embodiment described above, a press-molded material, in this embodiment, an optical glass material, and a press-molded product, in this embodiment, a glass lens, are first used. Each time the hollow member 18 is moved between the heating position and the retracted position in order to press-mold with the mold member 12A and the second mold member 12B, the first mold member 12A and the second mold member This is because the temperature of 12B needs to be varied between the oxidation temperature or lower and the press-moldable temperature.

第２実施形態に従った熱可塑性材料のプレス成形装置１０１においてはさらに、プレス成形の為に、熱可塑性材料１０のプレス成形素材、この実施形態では光学ガラス素材、を第１の金型部材１２Ａ及び第２の金型部材１２Ｂへと送るプレス成形素材搬入機構５２に図示されていない加熱器が設けられている。そして、プレス成形素材搬入機構５２が前記外端部から熱可塑性材料１０のプレス成形素材、この実施形態では光学ガラス素材、を中空部材１８の近傍まで搬送する間に熱可塑性材料１０のプレス成形素材、この実施形態では光学ガラス素材、を前記加熱器により所望の温度、例えばプレス成形可能温度、まで加熱することが出来る。さらに、このように加熱されている熱可塑性材料１０のプレス成形素材、この実施形態では光学ガラス素材、を、そのままの温度を保ったまま前述した如く中空部材１８を加熱位置と退避位置との間で移動させる度に温度を酸化温度以下とプレス成形可能温度との間で変動させる必要がない第１の金型部材１２Ａ及び第２の金型部材１２Ｂの中の第１の金型部材１２Ａの金型面上に置くことが出来る。従って、この後に中空部材１８が退避位置から加熱位置に移動されると、直ちに第１の金型部材１２Ａ及び第２の金型部材１２Ｂにより熱可塑性材料１０のプレス成形素材、この実施形態では光学ガラス素材、からガラスレンズをプレス成形することが出来る。   In the thermoplastic material press-molding apparatus 101 according to the second embodiment, the press-molding material of the thermoplastic material 10, that is, the optical glass material in this embodiment, is further used for the press molding. And the heater which is not illustrated is provided in the press molding raw material carrying-in mechanism 52 sent to the 2nd metal mold | die member 12B. Then, the press molding material carrying mechanism 52 transports the press molding material of the thermoplastic material 10 from the outer end portion to the vicinity of the hollow member 18 in this embodiment, that is, the optical glass material in this embodiment. In this embodiment, the optical glass material can be heated to a desired temperature, for example, a press moldable temperature, by the heater. Further, the press molding material of the thermoplastic material 10 heated in this way, in this embodiment, the optical glass material, the hollow member 18 between the heating position and the retracted position as described above while maintaining the temperature as it is. Of the first mold member 12A in the first mold member 12A and the second mold member 12B, which does not need to be changed between the oxidation temperature or lower and the press-moldable temperature each time the first mold member 12A is moved. Can be placed on the mold surface. Therefore, when the hollow member 18 is moved from the retracted position to the heating position thereafter, the first mold member 12A and the second mold member 12B immediately press-mold the thermoplastic material 10, which in this embodiment is optical. A glass lens can be press-molded from a glass material.

このことも、第２実施形態に従った熱可塑性材料のプレス成形装置１０１において１回のプレス成形に要するサイクルタイムを、第１実施形態に従った熱可塑性材料のプレス成形装置１において１回のプレス成形に要するサイクルタイムよりもかなり短縮させる。   This also means that the cycle time required for one press molding in the thermoplastic material press molding apparatus 101 according to the second embodiment is the same as that of the thermoplastic material press molding apparatus 1 according to the first embodiment. This is considerably shorter than the cycle time required for press forming.

さらに、第２実施形態に従った熱可塑性材料のプレス成形装置１０１においては、前記プレス成形が繰り返し行われている間に第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度は前記プレス成形加工可能温度に維持されるので、外側加熱器２２を省略することが出来る。さらに、中空部材１８無しで第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂのみにより第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度を前記プレス成形加工可能温度に維持することが出来るのであれば、中空部材１８も省略することが出来る。   Further, in the thermoplastic material press-molding apparatus 101 according to the second embodiment, the temperature of the first mold member 12A and the second mold member 12B is changed while the press molding is repeatedly performed. Since it is maintained at the temperature at which press forming is possible, the outer heater 22 can be omitted. Further, the temperature of the first mold member 12A and the second mold member 12B can be set to the press molding processable temperature only by the first planar heater 16A and the second planar heater 16B without the hollow member 18. The hollow member 18 can also be omitted if it can be maintained.

図１乃至図４を参照しながら第１実施形態の項目において前述したように、光学ガラス素材をガラスレンズへと精度良くプレス成形するには、光学ガラス素材の粘度の高いガラス屈服点付近で光学ガラス素材にプレス力を加えて大まかな変形加工を行い、その後にガラス屈服点よりもわずかに温度が低く熱膨張係数も小さなガラス転移点付近まで徐々に温度を低下させながら光学ガラス素材にプレス力を加え続けることにより光学ガラス素材にアニーリング効果と金型面の形状の正確な転写とを行う必要がある。   As described above in the first embodiment with reference to FIGS. 1 to 4, in order to accurately press-mold an optical glass material into a glass lens, an optical glass is used near the glass bending point where the viscosity of the optical glass material is high. Applying a pressing force to the glass material, roughly deforming it, and then pressing the optical glass material while gradually lowering the temperature to near the glass transition point where the temperature is slightly lower than the glass bending point and the coefficient of thermal expansion is small. Therefore, it is necessary to perform an annealing effect and an accurate transfer of the shape of the mold surface on the optical glass material by continuing to add.

そこで、前記プレス成形が繰り返し行われている間に第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度を所望の温度に維持することが容易な第２実施形態に従った熱可塑性材料のプレス成形装置１０１において、熱可塑性材料１０のプレス成形素材、この実施形態では光学ガラス素材、がプレス成形素材搬入機構５２により第１の金型部材１２Ａ及び第２の金型部材１２Ｂに向かい搬送される間に前記図示されていない加熱器によりガラス屈服点まで加熱され、プレス成形前の第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度をガラス屈服点温度に維持した場合とガラス屈服点温度よりもわずかに低いガラス転移点に維持した場合の、利害得失を確認してみた。   Therefore, the thermoplasticity according to the second embodiment that makes it easy to maintain the temperature of the first mold member 12A and the second mold member 12B at a desired temperature while the press molding is repeatedly performed. In the material press molding apparatus 101, the press molding material of the thermoplastic material 10, in this embodiment, the optical glass material, is directed to the first mold member 12A and the second mold member 12B by the press molding material carry-in mechanism 52. When heated to the glass bending point by the heater (not shown) while being transported, and the temperature of the first mold member 12A and the second mold member 12B before press molding is maintained at the glass bending point temperature We confirmed the advantages and disadvantages of maintaining the glass transition point slightly lower than the glass bending point temperature.

プレス成形前に第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度をガラス屈服点温度に維持した場合、相互に離間されている第１の金型部材１２Ａ及び第２の金型部材１２Ｂに搬入される熱可塑性材料１０のプレス成形素材、この実施形態では光学ガラス素材、の温度もガラス屈服点温度に加熱されているので、第１の金型部材１２Ａ及び第２の金型部材１２Ｂによる熱可塑性材料１０のプレス成形素材、この実施形態では光学ガラス素材、のプレス成形開始後は、プレス成形終了まで第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度がガラス屈服点温度よりもわずかに低いガラス転移点になるよう外側加熱器２２及び／又は第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの発熱温度を調整する必要がある。そして、プレス成形終了後に第１の金型部材１２Ａ及び第２の金型部材１２Ｂが再び相互に離間されプレス成形されたプレス成形物Ｇ、この実施形態ではガラスレンズ、が第１の金型部材１２Ａ及び第２の金型部材１２Ｂから取り出された後に、次のプレス成形の為に第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度をガラス転移点温度からガラス屈服点温度へと上昇させるよう外側加熱器２２及び／又は第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの発熱温度を調整する必要がある。   When the temperature of the first mold member 12A and the second mold member 12B is maintained at the glass bending point temperature before the press molding, the first mold member 12A and the second mold which are separated from each other. Since the temperature of the press-molding material of the thermoplastic material 10 carried into the member 12B, in this embodiment, the optical glass material, is also heated to the glass bending point temperature, the first mold member 12A and the second mold After the press molding of the thermoplastic material 10 by the member 12B, in this embodiment, the optical glass material, the temperature of the first mold member 12A and the second mold member 12B is glass until the press molding is completed. It is necessary to adjust the heat generation temperature of the outer heater 22 and / or the first planar heater 16A and the second planar heater 16B so that the glass transition point is slightly lower than the bending point temperature. Then, after the press molding is finished, the first mold member 12A and the second mold member 12B are again separated from each other and press-molded product G, which is a glass lens in this embodiment, is the first mold member. After being taken out of 12A and the second mold member 12B, the temperature of the first mold member 12A and the second mold member 12B is changed from the glass transition temperature to the glass bending point temperature for the next press molding. It is necessary to adjust the heat generation temperature of the outer heater 22 and / or the first planar heater 16A and the second planar heater 16B so as to increase.

即ち、プレス成形前の第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度をガラス屈服点温度に維持した場合、１回のプレス成形の為に第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度がガラス屈服点温度よりもわずかに低いガラス転移点になるよう外側加熱器２２及び／又は第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの発熱温度を調整する必要があり、さらには次のプレス成形の為に第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度をガラス転移点温度からガラス屈服点温度へと上昇させるよう外側加熱器２２及び／又は第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの発熱温度を調整する必要がある。このため、１回のプレス成形と次のプレス成形の準備の為に要する時間が長くなっている。このことは、プレス成形サイクルタイムが比較的長くなることを意味している。   That is, when the temperature of the first mold member 12A and the second mold member 12B before press molding is maintained at the glass bending point temperature, the first mold member 12A and the second mold member 12A are used for one press molding. Heat generation of the outer heater 22 and / or the first planar heater 16A and the second planar heater 16B so that the temperature of the second mold member 12B becomes a glass transition point slightly lower than the glass bending point temperature. It is necessary to adjust the temperature, and further, the outside of the first mold member 12A and the second mold member 12B is increased from the glass transition temperature to the glass bending point temperature for the next press molding. It is necessary to adjust the heat generation temperature of the heater 22 and / or the first planar heater 16A and the second planar heater 16B. For this reason, the time required for one press molding and the preparation of the next press molding is long. This means that the press molding cycle time is relatively long.

しかしながら、プレス成形前に第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度をガラス屈服点温度に維持した場合、プレス成形開始後からプレス成形終了までの第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度がプレス成形素材、この実施形態では光学ガラス素材、の高精度なプレス成形の為に最適に制御されるので、比較的大型のプレス成形物Ｇ、この実施形態では比較的大型のガラスレンズ、を高精度にプレス成形するのに適している。   However, when the temperature of the first mold member 12A and the second mold member 12B is maintained at the glass bending point temperature before press molding, the first mold member 12A from the start of press molding to the end of press molding. And the temperature of the second mold member 12B is optimally controlled for high-precision press-molding of the press-molding material, in this embodiment, the optical glass material. The form is suitable for press molding a relatively large glass lens with high accuracy.

プレス成形前の第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度をガラス屈服点温度よりもわずかに低いガラス転移点温度に維持した場合、相互に離間されている第１の金型部材１２Ａ及び第２の金型部材１２Ｂに搬入される熱可塑性材料１０のプレス成形素材、この実施形態では光学ガラス素材、の温度はガラス屈服点温度に加熱されているが、第１の金型部材１２Ａ及び第２の金型部材１２Ｂによる熱可塑性材料１０のプレス成形素材、この実施形態では光学ガラス素材、のプレス成形開始後でも、プレス成形終了まで外側加熱器２２及び／又は第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの発熱温度はプレス成形前に第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度をガラス屈服点温度よりもわずかに低いガラス転移点の温度に維持していた時のままである。そして、プレス成形終了後に第１の金型部材１２Ａ及び第２の金型部材１２Ｂが再び相互に離間されプレス成形されたプレス成形物Ｇ、この実施形態ではガラスレンズ、が第１の金型部材１２Ａ及び第２の金型部材１２Ｂから取りだされた後にも、次のプレス成形の為に第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度はガラス転移点温度に維持されたままである。   When the temperature of the first mold member 12A and the second mold member 12B before press molding is maintained at a glass transition point temperature slightly lower than the glass bending point temperature, the first molds separated from each other The temperature of the press-molding material of the thermoplastic material 10 carried into the mold member 12A and the second mold member 12B, in this embodiment the optical glass material, is heated to the glass bending point temperature. Even after the start of press molding of the press molding material of the thermoplastic material 10 by the mold member 12A and the second mold member 12B, in this embodiment, the optical glass material, the outer heater 22 and / or the first heater until the end of press molding. The heating temperature of the planar heating body 16A and the second planar heating body 16B is such that the temperature of the first mold member 12A and the second mold member 12B is slightly lower than the glass bending point temperature before press molding. It remains of when I was maintained at a temperature of Utsuriten. Then, after the press molding is finished, the first mold member 12A and the second mold member 12B are again separated from each other and press-molded product G, which is a glass lens in this embodiment, is the first mold member. Even after being taken out from 12A and the second mold member 12B, the temperature of the first mold member 12A and the second mold member 12B is maintained at the glass transition temperature for the next press molding. There is.

即ち、プレス成形前の第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度をガラス転移点温度に維持した場合、１回のプレス成形の為に第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度はガラス転移点から変更するよう外側加熱器２２及び／又は第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの発熱温度を調整する必要がなく、さらには次のプレス成形の為に第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度をガラス転移点温度から変更するよう外側加熱器２２及び／又は第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの発熱温度を調整する必要がない。このため、プレス成形前の第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度をガラス転移点温度に維持した場合、１回のプレス成形と次のプレス成形の準備の為に要する時間が、プレス成形前の第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度をガラス屈服点温度に維持した場合に比べ、短くなっている。このことは、プレス成形前の第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度をガラス転移点温度に維持した場合、プレス成形サイクルタイムが、プレス成形前の第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度をガラス屈服点温度に維持した場合に比べ、短くなることを意味している。   That is, when the temperature of the first mold member 12A and the second mold member 12B before press molding is maintained at the glass transition point temperature, the first mold member 12A and the second mold member 12A are used for one press molding. It is not necessary to adjust the heat generation temperature of the outer heater 22 and / or the first planar heater 16A and the second planar heater 16B so that the temperature of the second mold member 12B is changed from the glass transition point. Further, the outer heater 22 and / or the first planar heating body 16A is used to change the temperature of the first mold member 12A and the second mold member 12B from the glass transition temperature for the next press molding. And there is no need to adjust the heat generation temperature of the second planar heating element 16B. For this reason, when the temperature of the first mold member 12A and the second mold member 12B before press molding is maintained at the glass transition temperature, it is necessary for preparation for one press molding and the next press molding. The time is shorter than when the temperatures of the first mold member 12A and the second mold member 12B before press molding are maintained at the glass bending point temperature. This means that when the temperature of the first mold member 12A and the second mold member 12B before press molding is maintained at the glass transition temperature, the press mold cycle time is the first mold before press molding. This means that the temperature of the member 12A and the second mold member 12B is shorter than when the temperature is maintained at the glass bending point temperature.

しかしながら、プレス成形前に第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度をガラス転移点温度に維持した場合、プレス成形開始後からプレス成形終了までの第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度がプレス成形素材、この実施形態では光学ガラス素材、の高精度なプレス成形の為に最適に制御されないので、比較的大型のプレス成形物Ｇ、この実施形態では比較的大型のガラスレンズ、を高精度でプレス成形するのに適していない。   However, when the temperature of the first mold member 12A and the second mold member 12B is maintained at the glass transition temperature before press molding, the first mold member 12A from the start of press molding to the end of press molding is used. And the temperature of the second mold member 12B is not optimally controlled for high-precision press-molding of the press-molding material, in this embodiment, the optical glass material, so that the relatively large press-molded product G, this embodiment However, it is not suitable for press molding a relatively large glass lens with high accuracy.

従って、ガラス屈服点温度に加熱されているプレス成形素材、この実施形態では光学ガラス素材、から直径１０ｍｍ以下のガラスレンズをプレス成形する場合は、よほど高い精度を求められないのであればプレス成形前に第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度をガラス転移点温度に維持しておくことで良い。また、ガラス屈服点温度に加熱されているプレス成形素材、この実施形態では光学ガラス素材、から直径４０ｍｍ以上のガラスレンズをプレス成形する場合は、プレス成形前に第１の金型部材１２Ａ及び第２の金型部材１２Ｂの温度をガラス屈服点温度に維持しておく方が良い。   Therefore, when press-molding a glass lens having a diameter of 10 mm or less from a press-molding material heated to the glass bending point temperature, in this embodiment, an optical glass material, if a very high accuracy is not required, before press molding In addition, the temperature of the first mold member 12A and the second mold member 12B may be maintained at the glass transition temperature. Further, in the case of press-molding a glass lens having a diameter of 40 mm or more from a press-molding material heated to a glass bending point temperature, in this embodiment, an optical glass material, the first mold member 12A and the first mold member 12A are formed before press molding. It is better to maintain the temperature of the second mold member 12B at the glass bending point temperature.

なお、第２実施形態に従った熱可塑性材料のプレス成形装置１０１は、気密に構成されたハウジング５０の内部空間に、第１実施形態に従った熱可塑性材料のプレス成形装置１とは上下逆さまに格納され固定されていたが、第１実施形態に従った熱可塑性材料のプレス成形装置１と同じ上下方向を向いて格納され固定されていても良い。   The thermoplastic material press molding apparatus 101 according to the second embodiment is turned upside down from the thermoplastic material press molding apparatus 1 according to the first embodiment in an internal space of the airtightly configured housing 50. However, it may be stored and fixed in the same vertical direction as the thermoplastic material press molding apparatus 1 according to the first embodiment.

［面状加熱体の変形例］
次に、図１０及び図１１を参照しながら、図３及び図４中に示されていた第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの変形例を説明する。図１０は、第１の面状加熱体１６Ａの変形例の概略的な水平断面図であり、図１１は、図１０の変形例の概略的な下面図である。図３及び図４中に示されていた第２の面状加熱体１６Ｂの変形例の構成は第１の面状加熱体１６Ａの変形例の構成と同じである。 [Modified example of planar heating element]
Next, a modification of the first planar heating body 16A and the second planar heating body 16B shown in FIGS. 3 and 4 will be described with reference to FIGS. FIG. 10 is a schematic horizontal sectional view of a modification of the first planar heating element 16A, and FIG. 11 is a schematic bottom view of the modification of FIG. The configuration of the modification of the second planar heating body 16B shown in FIGS. 3 and 4 is the same as the configuration of the modification of the first planar heating body 16A.

変形例の第１の面状加熱体１６０Ａは、図１０中に示されている如く、円板状の本体ＭＢ１０と、本体ＭＢ１０の円周面において本体ＭＢ１０の２つの直径方向に突出した２対の電極部ＥＴ１０，ＥＴ１２；ＥＴ１３，ＥＴ１４と、を含む。   As shown in FIG. 10, the modified first planar heating body 160 </ b> A includes a disk-shaped main body MB <b> 10 and two pairs protruding in the two diametrical directions of the main body MB <b> 10 on the circumferential surface of the main body MB <b> 10. Electrode portions ET10, ET12; ET13, ET14.

変形例の第１の面状加熱体１６０Ａは、中心部電気抵抗発熱部ＨＰ１及び周辺部電気抵抗発熱部ＨＰ２と中心部電気抵抗発熱部ＨＰ１及び周辺部電気抵抗発熱部ＨＰ２の夫々の為の二対の電極を含む。詳細には、この変形例の第１の面状加熱体１６０Ａは、夫々が黒鉛やＳｉＣなどの導電体で形成された図示されていない円板状のコアの周囲をＰＢＮ（パイロリティックボロンナイトライド：熱分解窒化硼素）などの絶縁体でＣＶＤ等によりコーティングし、さらにその上に一対の電極部ＥＴ１０，ＥＴ１２間で黒鉛やＳｉＣなどの導電体で周辺部電気抵抗発熱部ＨＰ２となる所望のパターン形状を形成するとともにもう一対の電極部ＥＴ１３，ＥＴ１４間で黒鉛やＳｉＣなどの導電体で中心部電気抵抗発熱部ＨＰ１となる所望のパターン形状を形成し、さらにこれらの上をＰＢＮ（パイロリティックボロンナイトライド：熱分解窒化硼素）などの絶縁体でＣＶＤ等によりコーティングすることにより作成されている。第１の面状加熱体１６０Ａの絶縁体は、面の厚さ方向には熱伝導が悪く、面が広がる方向には熱伝導が良い。   The first planar heating body 160A of the modified example includes two parts for the central electric resistance heating part HP1, the peripheral electric resistance heating part HP2, the central electric resistance heating part HP1, and the peripheral electric resistance heating part HP2. Includes a pair of electrodes. Specifically, the first planar heating body 160A of this modification is formed by surrounding PBN (pyrolytic boron nitride) around a disk-shaped core (not shown) formed of a conductor such as graphite or SiC. : A desired pattern that is coated with an insulator such as pyrolytic boron nitride) by CVD or the like, and further becomes a peripheral electrical resistance heating part HP2 with a conductor such as graphite or SiC between the pair of electrode parts ET10 and ET12 thereon In addition to forming the shape, a desired pattern shape is formed between the other electrode portions ET13 and ET14 to become the central electric resistance heating portion HP1 with a conductor such as graphite or SiC, and PBN (pyrolytic boron) is further formed thereon. (Nitride: pyrolytic boron nitride) and the like. The insulator of the first planar heating body 160A has poor heat conduction in the thickness direction of the face and good heat conduction in the direction in which the face expands.

導電体の中心部電気抵抗発熱部ＨＰ１及び周辺部電気抵抗発熱部ＨＰ２の夫々は、第１の面状加熱体１６０Ａにより加熱される第１の金型部材１２Ａの金型面における所望の温度分布に対応したパターン形状を有している。   Each of the central electric resistance heat generating portion HP1 and the peripheral electric resistance heat generating portion HP2 of the conductor has a desired temperature distribution on the mold surface of the first mold member 12A heated by the first planar heating body 160A. Has a pattern shape corresponding to.

さらに詳細には、この変形例において、導電体の周辺部電気抵抗発熱部ＨＰ２の所望のパターン形状は、図１０中に示されている如く、一方の電極部ＥＴ１０から本体ＭＢ１０の一方の半円に沿い他方の電極部ＥＴ１２に向かい延出した後に本体ＭＢ１０の中心に向かう途中まで螺旋状に延出し、さらに本体ＭＢ１０の中心に対して反対側に位置する本体ＭＢ１０の中心に向かう途中から一方の電極部ＥＴ１０に向かい螺旋状に延出した後に本体ＭＢ１０の他方の半円に沿い他方の電極部ＥＴ１２に向かい延出している。そして、周辺部電気抵抗発熱部ＨＰ２のこのパターン形状において本体ＭＢ１０の中心に対して対称に位置している２つの螺旋状延出部分の内端は、図１１中に示されている如く前記コアを挟んだ反対側の下層の絶縁体上に形成されている電気接続パターンＥＣ１により相互に電気的に接続されている。一対の電極部ＥＴ１０，ＥＴ１２に配置されている周辺部電気抵抗発熱部ＨＰ２の両端部位は、周辺部電気抵抗発熱部ＨＰ２の為の一対の電極Ｔ１０，Ｔ１２となっている。導電体の周辺部電気抵抗発熱部ＨＰ２のこのようなパターン形状では、第１の面状加熱体１６０Ａの平面の周辺部が、平面が広がる方向において略均一な発熱特性を有する。   More specifically, in this modified example, the desired pattern shape of the peripheral electric resistance heating part HP2 of the conductor is from one electrode part ET10 to one semicircle of the main body MB10 as shown in FIG. Is extended to the other electrode portion ET12 and then spirally extended to the middle of the main body MB10, and further to the center of the main body MB10 located on the opposite side to the center of the main body MB10. After extending toward the electrode portion ET10 in a spiral shape, it extends along the other semicircle of the main body MB10 toward the other electrode portion ET12. And in this pattern shape of the peripheral electrical resistance heating part HP2, the inner ends of the two spirally extending portions positioned symmetrically with respect to the center of the main body MB10 are the cores as shown in FIG. Are electrically connected to each other by an electrical connection pattern EC1 formed on a lower-layer insulator on the opposite side across the electrode. Both end portions of the peripheral electric resistance heat generating part HP2 arranged in the pair of electrode parts ET10, ET12 are a pair of electrodes T10, T12 for the peripheral electric resistance heat generating part HP2. In such a pattern shape of the peripheral electric resistance heating portion HP2 of the conductor, the peripheral portion of the plane of the first planar heating body 160A has substantially uniform heat generation characteristics in the direction in which the plane expands.

一対の電極部ＥＴ１０，ＥＴ１２には、所望のパターン形状の周辺部電気抵抗発熱部ＨＰ２の両端部位の電極Ｔ１０，Ｔ１２が露出された一対の電極露出開口ＴＯ１０，ＴＯ１２が形成されている。   The pair of electrode portions ET10 and ET12 are formed with a pair of electrode exposure openings TO10 and TO12 in which the electrodes T10 and T12 at both ends of the peripheral electrical resistance heating portion HP2 having a desired pattern shape are exposed.

第１の金型固定部材３２Ａの第１固定部材３２ｄ及び第２固定部材３２ｅの為の前述した固定ボルト等の固定部品（締結部品）の中の２つが、図２中に示されている如く、変形例の第１の面状加熱体１６０Ａの一対の電極部ＥＴ１０，ＥＴ１２の一対の電極露出開口ＴＯ１０，ＴＯ１２に挿入され周辺部電気抵抗発熱部ＨＰ２の両端部位の電極Ｔ１０，Ｔ１２に電気的に接続されて外部接続端子を構成している。周辺部電気抵抗発熱部ＨＰ２の為のこれら外部接続端子は、第１の金型固定部材３２Ａの第１固定部材３２ｄ及び第２固定部材３２ｅに対し碍子等の電気絶縁部材を介して接触している。   Two of the fixing parts (fastening parts) such as the fixing bolts for the first fixing member 32d and the second fixing member 32e of the first mold fixing member 32A are as shown in FIG. Further, the electrodes T10 and T12 at both ends of the peripheral electric resistance heating portion HP2 are inserted into the pair of electrode exposure openings TO10 and TO12 of the pair of electrode portions ET10 and ET12 of the first planar heating body 160A of the modified example. The external connection terminal is configured by being connected to. These external connection terminals for the peripheral electric resistance heating part HP2 are in contact with the first fixing member 32d and the second fixing member 32e of the first mold fixing member 32A through an electric insulating member such as an insulator. Yes.

この変形例において、導電体の中心部電気抵抗発熱部ＨＰ１の所望のパターン形状は、図１０中に示されている如く、周辺部電気抵抗発熱部ＨＰ２の内周において一方の電極部ＥＴ１３に対応した位置から前記内周の一方の半円に沿い他方の電極部ＥＴ１４に対応した位置に向かい延出した後に本体ＭＢ１０の中心に向かい螺旋状に延出し、さらに本体ＭＢ１０の中心から前記内周の一方の電極部ＥＴ１３に対応した位置に向かい螺旋状に延出した後に前記内周の他方の半円に沿い他方の電極部ＥＴ１４に対応した位置に向かい延出している。そして、中心部電気抵抗発熱部ＨＰ１のこのパターン形状において本体ＭＢ１０の中心に対して対称に位置している２つの螺旋状延出部分の外端は、図１１中に示されている如く前記コアを挟んだ反対側の下層の絶縁体上に形成されている電気接続パターンＥＣ２によりもう一対の電極部ＥＴ１３，ＥＴ１４に配置されている中心部電気抵抗発熱部ＨＰ１の為の一対の電極Ｔ１３，Ｔ１４に電気接続されている。導電体の中心部電気抵抗発熱部ＨＰ１のこのようなパターン形状では、第１の面状加熱体１６０Ａの平面の中心部が、平面が広がる方向において略均一な発熱特性を有する。   In this modification, the desired pattern shape of the central electric resistance heat generating portion HP1 of the conductor corresponds to one electrode portion ET13 on the inner periphery of the peripheral electric resistance heat generating portion HP2, as shown in FIG. From the position where it extends along one semicircle of the inner circumference toward the position corresponding to the other electrode portion ET14, it extends spirally toward the center of the main body MB10, and further from the center of the main body MB10 to the inner circumference After extending spirally toward a position corresponding to one electrode portion ET13, it extends toward a position corresponding to the other electrode portion ET14 along the other semicircle on the inner periphery. The outer ends of the two spirally extending portions located symmetrically with respect to the center of the main body MB10 in this pattern shape of the central electric resistance heating part HP1 are the cores as shown in FIG. A pair of electrodes T13 and T14 for the central electrical resistance heating part HP1 disposed in the other pair of electrode parts ET13 and ET14 by the electrical connection pattern EC2 formed on the lower insulator on the opposite side across Is electrically connected. In such a pattern shape of the central electric resistance heating part HP1 of the conductor, the central part of the plane of the first planar heating body 160A has substantially uniform heat generation characteristics in the direction in which the plane expands.

もう一対の電極部ＥＴ１３，ＥＴ１４には、所望のパターン形状の中心部電気抵抗発熱部ＨＰ１の両端部位の電極Ｔ１３，Ｔ１４が露出された一対の電極露出開口ＴＯ１３，ＴＯ１４が形成されている。   The other pair of electrode portions ET13 and ET14 are formed with a pair of electrode exposure openings TO13 and TO14 in which the electrodes T13 and T14 at both ends of the central electric resistance heating portion HP1 having a desired pattern shape are exposed.

第１の金型固定部材３２Ａの第１固定部材３２ｄ及び第２固定部材３２ｅの為の前述した固定ボルト等の固定部材（締結部材）の中のさらに２つが、図２中に示されている如く、変形例の第１の面状加熱体１６０Ａのもう一対の電極部ＥＴ１３，ＥＴ１４の一対の電極露出開口ＴＯ１３，ＴＯ１４に挿入され中心部電気抵抗発熱部ＨＰ１の両端部位の電極Ｔ１３，Ｔ１４に電気的に接続されて外部接続端子を構成している。中心部電気抵抗発熱部ＨＰ１の為のこれら外部接続端子は、第１の金型固定部材３２Ａの第１固定部材３２ｄ及び第２固定部材３２ｅに対しては碍子等の電気絶縁部材を介して接触している。   Two more fixing members (fastening members) such as the fixing bolts described above for the first fixing member 32d and the second fixing member 32e of the first mold fixing member 32A are shown in FIG. Thus, the electrode T13 and T14 at both ends of the central electric resistance heating portion HP1 are inserted into the pair of electrode exposure openings TO13 and TO14 of the other pair of electrode portions ET13 and ET14 of the first planar heating body 160A of the modified example. It is electrically connected to form an external connection terminal. These external connection terminals for the central electric resistance heating part HP1 are in contact with the first fixing member 32d and the second fixing member 32e of the first mold fixing member 32A through an electric insulating member such as an insulator. doing.

即ちこの変形例において、中心部電気抵抗発熱部ＨＰ１は対応している金型部材の金型面の中心から相互に正反対の周方向に螺旋状に延出し両方の延出端に１対の電極Ｔ１３，Ｔ１４を有している。また、この変形例において、周辺部電気抵抗発熱部ＨＰ２は、中心部電気抵抗発熱部ＨＰ１の周囲において中心部電気抵抗発熱部ＨＰ１の直径方向に相互に離間した２つの位置から中心部電気抵抗発熱部ＨＰ１の周囲を相互に同じ周方向に巻かれた２つの部分を備えていて、２つの部分の夫々の内端は電気接続パターンＥＣ１により相互に電気的に接続されていて、２つの部分の夫々の外端は周辺部電気抵抗発熱部ＨＰ２の為の１対の電極Ｔ１０，Ｔ１２を有している。   In other words, in this modification, the center electric resistance heating part HP1 extends in a spiral shape from the center of the mold surface of the corresponding mold member in the opposite circumferential direction, and a pair of electrodes at both extension ends. T13, T14. Further, in this modified example, the peripheral electric resistance heat generating portion HP2 is heated at the central electric resistance heat generating portion HP2 from two positions separated from each other in the diameter direction of the central electric resistance heat generating portion HP1 around the central electric resistance heat generating portion HP1. The two parts wound around the part HP1 in the same circumferential direction are provided, and the inner ends of the two parts are electrically connected to each other by the electric connection pattern EC1, and the two parts Each outer end has a pair of electrodes T10 and T12 for the peripheral electric resistance heating part HP2.

さらに図３及び図４中に示されている第１実施形態の第１及び第２の面状加熱体１６Ａ，１６Ｂに代わり、図１０及び図１１中に示されている変形例の第１の面状加熱体１６０Ａ及び第２の面状加熱体（図示されていない）を使用する図１及び図２中に示されている第１実施形態の熱可塑性材料のプレス成形装置１においては、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの金型面の温度分布を直接的又は間接的に測定する為の図示されていない金型表面温度分布測定要素（例えば熱電対）が、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々の外周部，中心部，そして外周部と中心部との中間部に配置されている。第１の面状加熱体１６０Ａに対応した第１の金型部材１２Ａにおいては、前記外周部は第１の面状加熱体１６０Ａの周辺部電気抵抗発熱部ＨＰ２により加熱される領域に対応しており、前記中心部は第１の面状加熱体１６０Ａの中心部電気抵抗発熱部ＨＰ１により加熱される領域の中心に対応しており、そして前記中間部は第１の面状加熱体１６０Ａの周辺部電気抵抗発熱部ＨＰ２と中心部電気抵抗発熱部ＨＰ１との境界に対応している。   Further, instead of the first and second planar heating elements 16A and 16B of the first embodiment shown in FIGS. 3 and 4, a first modified example shown in FIGS. In the press molding apparatus 1 for the thermoplastic material of the first embodiment shown in FIGS. 1 and 2 using the planar heating body 160A and the second planar heating body (not shown), A mold surface temperature distribution measurement element (for example, a thermocouple) (not shown) for directly or indirectly measuring the temperature distribution of the mold surfaces of the first mold member 12A and the second mold member 12B, The first mold member 12 </ b> A and the second mold member 12 </ b> B are disposed at the outer peripheral part, the central part, and the intermediate part between the outer peripheral part and the central part. In the first mold member 12A corresponding to the first planar heating body 160A, the outer peripheral portion corresponds to a region heated by the peripheral electrical resistance heating portion HP2 of the first planar heating body 160A. The central portion corresponds to the center of the region heated by the central electric resistance heating portion HP1 of the first planar heating body 160A, and the intermediate portion is the periphery of the first planar heating body 160A. This corresponds to the boundary between the central electrical resistance heating part HP2 and the central electrical resistance heating part HP1.

図３及び図４中に示されている第１実施形態の第１の及び第２の面状加熱体１６Ａ，１６Ｂに代わり、図１０及び図１１中に示されている変形例の第１の面状加熱体１６０Ａ及び第２の面状加熱体（図示されていない）を使用する図１及び図２中に示されている第１実施形態の熱可塑性材料のプレス成形装置１においては、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々の金型面の温度分布を、第１実施形態の第１の及び第２の面状加熱体１６Ａ，１６Ｂと外側加熱器２２との組み合わせを使用した場合に比べると、第１の面状加熱体１６０Ａの周辺部電気抵抗発熱部ＨＰ２及び中心部電気抵抗発熱部ＨＰ１と図示されていない下側の面状加熱体の周辺部電気抵抗発熱部及び中心部電気抵抗発熱部と外側加熱器２２との組み合わせを使用した方がより細かく制御することが出来る。   Instead of the first and second planar heaters 16A and 16B of the first embodiment shown in FIGS. 3 and 4, the first modified example shown in FIGS. In the press molding apparatus 1 for the thermoplastic material of the first embodiment shown in FIGS. 1 and 2 using the planar heating body 160A and the second planar heating body (not shown), The temperature distribution of the respective mold surfaces of the first mold member 12A and the second mold member 12B is represented by the first and second planar heating bodies 16A and 16B and the outer heater 22 of the first embodiment. Compared to the case of using the combination of the peripheral electric resistance heat generating portion HP2 and the central electric resistance heat generating portion HP1 of the first planar heating body 160A and the peripheral electric power of the lower planar heating body (not shown). A combination of the resistance heating unit and the central electrical resistance heating unit and the outer heater 22 Can be better to use it to control more finely.

図１２には、図１０及び図１１に示した変形例の第１の面状加熱体１６０Ａ及びこれと同じ構成の図示されていない第２の面状加熱体を使用した図１の熱可塑性材料のプレス成形装置１において、第１の面状加熱体１６０Ａ及び第２の図示されていない面状加熱体の夫々の中心部電気抵抗発熱部ＨＰ１のみにより、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を加熱した場合における加熱時間に対する第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々の外周部温度ＰＴ，中間部温度ＩＴ，そして中心部温度ＣＴの上昇の様子が示されている。   FIG. 12 shows the thermoplastic material of FIG. 1 using the first planar heating body 160A of the modification shown in FIGS. 10 and 11 and a second planar heating body (not shown) having the same configuration as the first planar heating body 160A. In the press molding apparatus 1, the first mold member 12 </ b> A and the second mold member 12 </ b> A and the second mold member 12 </ b> A and the second mold member 12 </ b> A are formed only by the central electric resistance heating part HP <b> 1 of the first planar heating body 160 </ b> A and the second planar heating body (not shown). Of the outer peripheral temperature PT, the intermediate temperature IT, and the central temperature CT of each of the first mold member 12A and the second mold member 12B with respect to the heating time when each of the mold members 12B is heated. Is shown.

図１３には、図１０及び図１１に示した変形例の第１の面状加熱体１６０Ａ及びこれと同じ構成の図示されていない第２の面状加熱体を使用した図１の熱可塑性材料のプレス成形装置１において、第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の周辺部電気抵抗発熱部ＨＰ２のみにより、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を加熱した場合における加熱時間に対する第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々の外周部温度ＰＴ，中間部温度ＩＴ，そして中心部温度ＣＴの上昇の様子が示されている。   FIG. 13 shows the thermoplastic material of FIG. 1 using the first planar heating body 160A of the modification shown in FIGS. 10 and 11 and the second planar heating body (not shown) having the same configuration as that of FIG. In the press molding apparatus 1, the first mold member 12 </ b> A and the second mold member 12 </ b> A and the second mold member 12 </ b> A and the second mold member 12 </ b> A are only formed by the peripheral electric resistance heating part HP <b> 2 of the first planar heater 160 </ b> A and the second planar heater not shown. Of the outer peripheral temperature PT, the intermediate temperature IT, and the central temperature CT of each of the first mold member 12A and the second mold member 12B with respect to the heating time when each of the mold members 12B is heated. Is shown.

図１４には、図１０及び図１１に示した変形例の第１の面状加熱体１６０Ａ及びこれと同じ構成の図示されていない第２の面状加熱体を使用した図１の熱可塑性材料のプレス成形装置１において、第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の中心部電気抵抗発熱部ＨＰ１及び周辺部電気抵抗発熱部ＨＰ２により、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を加熱した場合における加熱時間に対する第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々の外周部温度ＰＴ，中間部温度ＩＴ，そして中心部温度ＣＴの上昇の様子が示されている。   FIG. 14 shows the thermoplastic material of FIG. 1 using the first planar heating body 160A of the modification shown in FIGS. 10 and 11 and the second planar heating body (not shown) having the same configuration as the first planar heating body 160A. In the press molding apparatus 1, the first electrical heating element HP1 and the peripheral electrical resistance heating part HP2 of the first planar heating body 160A and the second planar heating body (not shown) are used as the first planar heating body 160A. The outer peripheral temperature PT, the intermediate temperature IT of the first mold member 12A and the second mold member 12B with respect to the heating time when the mold member 12A and the second mold member 12B are heated, And the state of the rise of the center temperature CT is shown.

図１５には、図１０及び図１１に示した変形例の第１の面状加熱体１６０Ａ及びこれと同じ構成の図示されていない第２の面状加熱体を使用した図１の熱可塑性材料のプレス成形装置１において、外側加熱器２２のみを使用して、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を加熱した場合における加熱時間に対する第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々の外周部温度ＰＴ，中間部温度ＩＴ，そして中心部温度ＣＴの上昇の様子が示されている。   FIG. 15 shows the thermoplastic material of FIG. 1 using the first planar heating body 160A of the modification shown in FIGS. 10 and 11 and the second planar heating body (not shown) having the same configuration as the first planar heating body 160A. In the press molding apparatus 1, the first mold member 12A and the first mold member 12A with respect to the heating time when the first mold member 12A and the second mold member 12B are heated using only the outer heater 22 and The manner in which the outer peripheral temperature PT, the intermediate temperature IT, and the center temperature CT of the second mold member 12B are increased is shown.

図１６には、図１０及び図１１に示した変形例の第１の面状加熱体１６０Ａ及びこれと同じ構成の図示されていない第２の面状加熱体を使用した図１の熱可塑性材料のプレス成形装置１において、外側加熱器２２及び第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の中心部電気抵抗発熱部ＨＰ１の組み合わせを使用して、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を加熱した場合における加熱時間に対する第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々の外周部温度ＰＴ，中間部温度ＩＴ，そして中心部温度ＣＴの上昇の様子が示されている。   FIG. 16 shows the thermoplastic material of FIG. 1 using the first planar heating body 160A of the modification shown in FIGS. 10 and 11 and the second planar heating body (not shown) having the same configuration as the first planar heating body 160A. In the press molding apparatus 1, a combination of the outer heater 22, the first planar heating body 160 </ b> A, and the central electrical resistance heating section HP <b> 1 of the second planar heating body (not shown) is used, The outer peripheral temperature PT and the intermediate temperature of each of the first mold member 12A and the second mold member 12B with respect to the heating time when each of the first mold member 12A and the second mold member 12B is heated. The state of IT and the rise in the center temperature CT is shown.

図１７には、図１０及び図１１に示した変形例の第１の面状加熱体１６０Ａ及びこれと同じ構成の図示されていない第２の面状加熱体を使用した図１の熱可塑性材料のプレス成形装置１において、外側加熱器２２及び第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の周辺部電気抵抗発熱部ＨＰ２の組み合わせを使用して、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を加熱した場合における加熱時間に対する第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々の外周部温度ＰＴ，中間部温度ＩＴ，そして中心部温度ＣＴの上昇の様子が示されている。   FIG. 17 shows the thermoplastic material of FIG. 1 using the first planar heating body 160A of the modification shown in FIGS. 10 and 11 and a second planar heating body (not shown) having the same configuration as that of FIG. In the press molding apparatus 1, the outer heater 22, the first planar heating body 160 </ b> A, and the combination of the peripheral electrical resistance heating portions HP <b> 2 of the second planar heating body (not shown) are used. The outer peripheral temperature PT and the intermediate temperature of each of the first mold member 12A and the second mold member 12B with respect to the heating time when each of the first mold member 12A and the second mold member 12B is heated. The state of IT and the rise in the center temperature CT is shown.

図１８には、図１０及び図１１に示した変形例の第１の面状加熱体１６０Ａ及びこれと同じ構成の図示されていない第２の面状加熱体を使用した図１の熱可塑性材料のプレス成形装置１において、第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の中心部電気抵抗発熱部ＨＰ１及び周辺部電気抵抗発熱部ＨＰ２と外側加熱器２２との組み合わせを使用して、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を加熱した場合における加熱時間に対する第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々の外周部温度ＰＴ，中間部温度ＩＴ，そして中心部温度ＣＴの上昇の様子が示されている。   18 shows the thermoplastic material of FIG. 1 using the first planar heating body 160A of the modification shown in FIGS. 10 and 11 and the second planar heating body (not shown) having the same configuration as the first planar heating body 160A. In the press molding apparatus 1, the central electric resistance heating portion HP1 and the peripheral electric resistance heating portion HP2 of the first planar heating body 160A and the second planar heating body (not shown) and the outer heater 22 are respectively shown. Each of the first mold member 12A and the second mold member 12B with respect to the heating time when each of the first mold member 12A and the second mold member 12B is heated using the combination of The rise of the outer peripheral temperature PT, the intermediate temperature IT, and the central temperature CT is shown.

なお、図１２乃至図１８の夫々に示された場合における成形条件は、図５乃至図７の夫々に示された場合における成形条件と同じである。   The molding conditions in the cases shown in FIGS. 12 to 18 are the same as the molding conditions in the cases shown in FIGS.

そして、図１２の場合は、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を、第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の中心部電気抵抗発熱部ＨＰ１のみにより加熱している。従って、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々は中心部が外周部よりも先に加熱されて先に昇温し、中心部温度ＣＴが成形温度の５８０℃に到達した後にこの温度に安定するよう第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の中心部電気抵抗発熱部ＨＰ１の出力を調節した。この後、中間部温度ＩＴは成形温度の５８０℃に到達したが、周辺部温度ＰＴは成形温度の５８０℃に到達せず、成形温度よりも若干低い５７２℃で安定した。このように加熱された第１の金型部材１２Ａ及び第２の金型部材１２Ｂでは、夫々の金型面において第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の中心部電気抵抗発熱部ＨＰ１に対応する中央部で、前記プレス条件で前記光学ガラス素材を所望の寸法精度を有したガラスレンズにプレス成形することが出来る。なお、図１２の場合において、第１の金型部材１２Ｂの金型面において前記光学ガラス素材の周囲に前記周辺部温度ＰＴにより成形可能な別の素材を配置することにより、前記光学ガラス素材とともに前記別の素材も同時に第１の金型部材１２Ａ及び第２の金型部材１２Ｂにより所望の形状寸法に成形することが出来る。   In the case of FIG. 12, each of the first mold member 12A and the second mold member 12B is replaced with each of the first planar heating body 160A and the second planar heating body not shown. Heating is performed only by the central electric resistance heating part HP1. Therefore, each of the first mold member 12A and the second mold member 12B is heated at the center portion earlier than the outer peripheral portion so that the temperature rises first, and the center temperature CT reaches the molding temperature of 580 ° C. After that, the outputs of the central electric resistance heating part HP1 of each of the first planar heating element 160A and the second planar heating element (not shown) were adjusted so as to stabilize at this temperature. Thereafter, the intermediate temperature IT reached the molding temperature of 580 ° C., but the peripheral temperature PT did not reach the molding temperature of 580 ° C., and stabilized at 572 ° C., which is slightly lower than the molding temperature. In the first mold member 12A and the second mold member 12B heated in this manner, the first planar heating body 160A and the second planar heating body (not shown) on the respective mold surfaces. The optical glass material can be press-molded into a glass lens having a desired dimensional accuracy under the pressing conditions at the central portion corresponding to each central electric resistance heating portion HP1. In the case of FIG. 12, by placing another material that can be molded at the peripheral temperature PT around the optical glass material on the mold surface of the first mold member 12B, together with the optical glass material. The other material can also be formed into a desired shape and size by the first mold member 12A and the second mold member 12B at the same time.

図１３の場合は、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を、第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の周辺部電気抵抗発熱部ＨＰ２のみにより加熱している。従って、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々は周辺部が中心部よりも先に加熱されて先に昇温し、周辺部温度ＰＴが成形温度の５８０℃に到達した後にこの温度に安定するよう第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の周辺部電気抵抗発熱部ＨＰ２の出力を調節した。この後、中間部温度ＩＴは成形温度の５８０℃に到達したが、中央部温度ＰＴは成形温度の５８０℃に到達せず、成形温度よりも若干低い５７２℃で安定した。このように加熱された第１の金型部材１２Ａ及び第２の金型部材１２Ｂでは、夫々の金型面において第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の中央部電気抵抗発熱部ＨＰ１に対応する中央部では前記プレス条件で前記光学ガラス素材を所望の寸法精度を有したガラスレンズにプレス成形することが出来ない。しかしながら、前記夫々の金型面において第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の周辺部電気抵抗発熱部ＨＰ２に対応する周辺部では前記プレス条件で前記光学ガラス素材を周辺部のみ所望の寸法精度を有したガラス製品にプレス成形することが出来る。なお、図１３の場合において、第２の金型部材１２Ｂの金型面において前記光学ガラス素材の中央部に前記中央部温度ＣＴにより成形可能な別の素材を配置することにより、前記光学ガラス素材とともに前記別の素材も同時に第１の金型部材１２Ａ及び第２の金型部材１２Ｂにより所望の形状寸法に成形することが出来る。   In the case of FIG. 13, the first mold member 12A and the second mold member 12B are respectively connected to the peripheral portions of the first planar heating body 160A and the second planar heating body (not shown). Heating is performed only by the electric resistance heating part HP2. Accordingly, each of the first mold member 12A and the second mold member 12B has its peripheral part heated before the central part and heated first, and the peripheral part temperature PT reaches the molding temperature of 580 ° C. After that, the outputs of the peripheral electric resistance heating part HP2 of each of the first planar heating body 160A and the second planar heating body (not shown) were adjusted so as to be stabilized at this temperature. Thereafter, the intermediate temperature IT reached the molding temperature of 580 ° C., but the central temperature PT did not reach the molding temperature of 580 ° C. and stabilized at 572 ° C., which was slightly lower than the molding temperature. In the first mold member 12A and the second mold member 12B heated in this manner, the first planar heating body 160A and the second planar heating body (not shown) on the respective mold surfaces. In the central portion corresponding to each central electrical resistance heating portion HP1, the optical glass material cannot be press-molded into a glass lens having a desired dimensional accuracy under the pressing conditions. However, in the peripheral portions corresponding to the peripheral electric resistance heating portions HP2 of the first planar heating body 160A and the second planar heating body (not shown) on the respective mold surfaces, the pressing conditions are used. An optical glass material can be press-molded into a glass product having a desired dimensional accuracy only at the periphery. In the case of FIG. 13, the optical glass material is arranged by disposing another material that can be molded by the central temperature CT at the central portion of the optical glass material on the mold surface of the second mold member 12B. At the same time, the other material can be simultaneously formed into a desired shape by the first mold member 12A and the second mold member 12B.

図１４の場合は、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を、第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の中心部電気抵抗発熱部ＨＰ１及び周辺部電気抵抗発熱部ＨＰ２の両方により加熱している。従って、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々は中心部が外周部よりも先に加熱されて先に昇温し、中心部温度ＣＴが成形温度の５８０℃に到達した後にこの温度に安定するよう第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の中心部電気抵抗発熱部ＨＰ１の出力を調節した。この後、中間部温度ＩＴも成形温度の５８０℃に到達し、さらに周辺部温度ＰＴも成形温度の５８０℃に到達し、その後にこの温度に安定するよう第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の周辺部電気抵抗発熱部ＨＰ２の出力を調節した。このように加熱された第１の金型部材１２Ａ及び第２の金型部材１２Ｂでは、夫々の金型面において第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の中心部電気抵抗発熱部ＨＰ１に対応する中央部及び周辺部電気抵抗発熱部ＨＰ２に対応する周辺部の両方にわたり、前記プレス条件で前記光学ガラス素材を所望の寸法精度を有したガラスレンズにプレス成形することが出来る。   In the case of FIG. 14, the first mold member 12A and the second mold member 12B are respectively connected to the central portions of the first planar heating body 160A and the second planar heating body (not shown). Heating is performed by both the electric resistance heating part HP1 and the peripheral electric resistance heating part HP2. Therefore, each of the first mold member 12A and the second mold member 12B is heated at the center portion earlier than the outer peripheral portion so that the temperature rises first, and the center temperature CT reaches the molding temperature of 580 ° C. After that, the outputs of the central electric resistance heating part HP1 of each of the first planar heating element 160A and the second planar heating element (not shown) were adjusted so as to stabilize at this temperature. Thereafter, the intermediate part temperature IT also reaches the molding temperature of 580 ° C., and the peripheral part temperature PT also reaches the molding temperature of 580 ° C., and then the first planar heating body 160A and the illustration are shown to stabilize at this temperature. The output of the peripheral electric resistance heating part HP2 of each of the second planar heating elements that were not performed was adjusted. In the first mold member 12A and the second mold member 12B heated in this manner, the first planar heating body 160A and the second planar heating body (not shown) on the respective mold surfaces. The optical glass material is formed into a glass lens having a desired dimensional accuracy under the pressing conditions over both the central portion corresponding to each central electric resistance heating portion HP1 and the peripheral portion corresponding to the peripheral electric resistance heating portion HP2. It can be press-molded.

図１５の場合は、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を、外側加熱器２２のみを使用して加熱している。従って、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々は外周部が中心部よりも先に加熱されて先に昇温し、外周部温度ＰＴが成形温度の５８０℃に到達した後にこの温度に安定するよう外側加熱器２２の出力を調節した。しかしながら、中心部温度ＣＴは成形温度の５８０℃には到達せず、成形温度よりも若干低い５７２℃で安定した。このように加熱された第１の金型部材１２Ａ及び第２の金型部材１２Ｂでは、夫々の金型面において第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の中央部では前記プレス条件で前記光学ガラス素材を所望の寸法精度を有したガラスレンズにプレス成形することが出来ない。しかしながら、前記夫々の金型面において第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の周辺部では前記プレス条件で前記光学ガラス素材を周辺部のみ所望の寸法精度を有したガラス製品にプレス成形することが出来る。なお、図１５の場合において、第２の金型部材１２Ｂの金型面において前記光学ガラス素材の中央部に前記中央部温度ＣＴにより成形可能な別の素材を配置することにより、前記光学ガラス素材とともに前記別の素材も同時に第１の金型部材１２Ａ及び第２の金型部材１２Ｂにより所望の形状寸法に成形することが出来る。   In the case of FIG. 15, each of the first mold member 12 </ b> A and the second mold member 12 </ b> B is heated using only the outer heater 22. Accordingly, each of the first mold member 12A and the second mold member 12B has its outer peripheral portion heated before the central portion and heated first, and the outer peripheral temperature PT reaches the molding temperature of 580 ° C. After that, the output of the outer heater 22 was adjusted to stabilize at this temperature. However, the center temperature CT did not reach the molding temperature of 580 ° C. and stabilized at 572 ° C., which is slightly lower than the molding temperature. In the first mold member 12A and the second mold member 12B heated in this manner, the first planar heating body 160A and the second planar heating body (not shown) on the respective mold surfaces. In each central portion, the optical glass material cannot be press-molded into a glass lens having a desired dimensional accuracy under the press conditions. However, in the respective peripheral surfaces of the first planar heating element 160A and the second planar heating element (not shown) on the respective mold surfaces, the optical glass material has a desired dimension only in the peripheral area under the pressing conditions. It can be press-molded into a glass product with accuracy. In the case of FIG. 15, the optical glass material is arranged by disposing another material that can be molded at the center temperature CT at the center of the optical glass material on the mold surface of the second mold member 12 </ b> B. At the same time, the other material can be simultaneously formed into a desired shape by the first mold member 12A and the second mold member 12B.

図１６の場合は、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を、外側加熱器２２と第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の中心部電気抵抗発熱部ＨＰ１との組み合わせを使用して加熱している。従って、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々は外周部が中心部よりも先に加熱されて先に昇温し、外周部温度ＰＴが成形温度の５８０℃に到達した後にこの温度に安定するよう外側加熱器２２の出力を調節した。その後、中間部温度ＩＴに続き中心部温度ＣＴも成形温度の５８０℃に到達し、この温度に安定するよう中心部電気抵抗発熱部ＨＰ１の出力を調節した。このように加熱された第１の金型部材１２Ａ及び第２の金型部材１２Ｂでは、夫々の金型面において第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の中心部電気抵抗発熱部ＨＰ１に対応する中央部及び外側加熱器２２により加熱される周辺部の両方にわたり、前記プレス条件で前記光学ガラス素材を所望の寸法精度を有したガラスレンズにプレス成形することが出来る。   In the case of FIG. 16, each of the first mold member 12A and the second mold member 12B is replaced with the outer heater 22, the first planar heater 160A, and a second planar heater not shown. Heating is performed using a combination with each of the central electric resistance heating portions HP1. Accordingly, each of the first mold member 12A and the second mold member 12B has its outer peripheral portion heated before the central portion and heated first, and the outer peripheral temperature PT reaches the molding temperature of 580 ° C. After that, the output of the outer heater 22 was adjusted to stabilize at this temperature. Thereafter, the central temperature CT also reached the molding temperature 580 ° C. following the intermediate temperature IT, and the output of the central electric resistance heating part HP1 was adjusted so as to be stable at this temperature. In the first mold member 12A and the second mold member 12B heated in this manner, the first planar heating body 160A and the second planar heating body (not shown) on the respective mold surfaces. The optical glass material is press-molded into a glass lens having a desired dimensional accuracy under the pressing conditions over both the central portion corresponding to each central electric resistance heating portion HP1 and the peripheral portion heated by the outer heater 22. I can do it.

図１７の場合は、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を、外側加熱器２２と第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の周辺部電気抵抗発熱部ＨＰ２との組み合わせを使用して加熱している。従って、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々は外周部が中心部よりも先に加熱されて先に昇温し、外周部温度ＰＴが成形温度の５８０℃に到達した後にこの温度に安定するよう外側加熱器２２の出力と第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の周辺部電気抵抗発熱部ＨＰ２の出力を調節した。この後、中間部温度ＩＴは成形温度の５８０℃に到達したが、中央部温度ＰＴは成形温度の５８０℃に到達せず、成形温度よりも若干低い温度で安定した。このように加熱された第１の金型部材１２Ａ及び第２の金型部材１２Ｂでは、夫々の金型面において第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の中央部電気抵抗発熱部ＨＰ１に対応する中央部では前記プレス条件で前記光学ガラス素材を所望の寸法精度を有したガラスレンズにプレス成形することが出来ない。しかしながら、前記夫々の金型面において第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の周辺部電気抵抗発熱部ＨＰ２に対応する周辺部では前記プレス条件で前記光学ガラス素材を周辺部のみ所望の寸法精度を有したガラス製品にプレス成形することが出来る。なお、図１７の場合において、第２の金型部材１２Ｂの金型面において前記光学ガラス素材の中央部に前記中央部温度ＣＴにより成形可能な別の素材を配置することにより、前記光学ガラス素材とともに前記別の素材も同時に第１の金型部材１２Ａ及び第２の金型部材１２Ｂにより所望の形状寸法に成形することが出来る。   In the case of FIG. 17, each of the first mold member 12A and the second mold member 12B is replaced with the outer heater 22, the first planar heater 160A, and a second planar heater not shown. Each of the peripheral electric resistance heating portions HP2 is used in combination for heating. Accordingly, each of the first mold member 12A and the second mold member 12B has its outer peripheral portion heated before the central portion and heated first, and the outer peripheral temperature PT reaches the molding temperature of 580 ° C. After that, the output of the outer heater 22 and the outputs of the first sheet heater 160A and the peripheral electric resistance heating section HP2 of the second sheet heater (not shown) are adjusted so that the temperature is stabilized. . Thereafter, the intermediate part temperature IT reached the molding temperature of 580 ° C., but the central part temperature PT did not reach the molding temperature of 580 ° C. and was stabilized at a temperature slightly lower than the molding temperature. In the first mold member 12A and the second mold member 12B heated in this manner, the first planar heating body 160A and the second planar heating body (not shown) on the respective mold surfaces. In the central portion corresponding to each central electrical resistance heating portion HP1, the optical glass material cannot be press-molded into a glass lens having a desired dimensional accuracy under the pressing conditions. However, in the peripheral portions corresponding to the peripheral electric resistance heating portions HP2 of the first planar heating body 160A and the second planar heating body (not shown) on the respective mold surfaces, the pressing conditions are used. An optical glass material can be press-molded into a glass product having a desired dimensional accuracy only at the periphery. In the case of FIG. 17, the optical glass material is arranged by disposing another material that can be molded by the central temperature CT at the central portion of the optical glass material on the mold surface of the second mold member 12B. At the same time, the other material can be simultaneously formed into a desired shape by the first mold member 12A and the second mold member 12B.

図１８の場合は、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を、外側加熱器２２と第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の中央部電気抵抗発熱部ＨＰ１及び周辺部電気抵抗発熱部ＨＰ２との組み合わせを使用して加熱している。従って、第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々は外周部が中心部よりも先に加熱されて先に昇温し、外周部温度ＰＴが成形温度の５８０℃に到達した後にこの温度に安定するよう外側加熱器２２の出力及び周辺部電気抵抗発熱部ＨＰ２の出力を調節した。その後、中間部温度ＩＴに続き中心部温度ＣＴも成形温度の５８０℃に到達し、この温度に安定するよう中心部電気抵抗発熱部ＨＰ１の出力を調節した。このように加熱された第１の金型部材１２Ａ及び第２の金型部材１２Ｂでは、夫々の金型面において第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の中心部電気抵抗発熱部ＨＰ１に対応する中央部及び周辺部電気抵抗発熱部ＨＰ２に対応するとともに外側加熱器２２により加熱される周辺部の両方にわたり、前記プレス条件で前記光学ガラス素材を所望の寸法精度を有したガラスレンズにプレス成形することが出来る。しかも、図１８の場合は、図１４中に示されている第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の中心部電気抵抗発熱部ＨＰ１及び周辺部電気抵抗発熱部ＨＰ２の両方により加熱する場合や、図１６中に示されている第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々を外側加熱器２２と第１の面状加熱体１６０Ａ及び図示されていない第２の面状加熱体の夫々の中心部電気抵抗発熱部ＨＰ１との組み合わせを使用して加熱する場合に比べ、遥かに早く第１の金型部材１２Ａ及び第２の金型部材１２Ｂの夫々の外周部及び中心部を所望の成形温度まで上昇させることが出来る。   In the case of FIG. 18, each of the first mold member 12A and the second mold member 12B is replaced with the outer heater 22, the first planar heater 160A, and a second planar heater not shown. Heating is performed using a combination of the central electric resistance heating part HP1 and the peripheral electric resistance heating part HP2. Accordingly, each of the first mold member 12A and the second mold member 12B has its outer peripheral portion heated before the central portion and heated first, and the outer peripheral temperature PT reaches the molding temperature of 580 ° C. After that, the output of the outer heater 22 and the output of the peripheral electric resistance heating part HP2 were adjusted so as to stabilize at this temperature. Thereafter, the central temperature CT also reached the molding temperature 580 ° C. following the intermediate temperature IT, and the output of the central electric resistance heating part HP1 was adjusted so as to be stable at this temperature. In the first mold member 12A and the second mold member 12B heated in this manner, the first planar heating body 160A and the second planar heating body (not shown) on the respective mold surfaces. Desirable the optical glass material under the pressing conditions over both the central portion corresponding to each central electric resistance heating portion HP1 and the peripheral portion corresponding to the peripheral electric resistance heating portion HP2 and heated by the outer heater 22 It can be press-molded into a glass lens having a dimensional accuracy of In addition, in the case of FIG. 18, the first mold member 12A and the second mold member 12B shown in FIG. 14 are replaced with the first planar heating body 160A and the second not shown. When heating is performed by both the central electric resistance heat generating portion HP1 and the peripheral electric resistance heat generating portion HP2 of the planar heating body, or the first mold member 12A and the second metal mold shown in FIG. Each of the mold members 12B is heated by using a combination of the outer heater 22, the first sheet heating body 160A, and the central electric resistance heating section HP1 of the second sheet heating body (not shown). Compared to the case, the outer peripheral portion and the central portion of the first mold member 12A and the second mold member 12B can be raised to a desired molding temperature much earlier.

なお本願の発明の概念に従えば、第１の面状加熱体１６Ａ及び第２の面状加熱体１６Ｂの夫々の電気抵抗発熱部ＨＰの個数及び配列パターンは、それが加熱する第１の金型部材１２Ａ又は第２の金型部材１２Ｂの金型面が要求している所望の温度配列パターンに対応するよう種々に選択することが出来る。   According to the concept of the invention of the present application, the number and arrangement pattern of the electric resistance heating portions HP of the first planar heating body 16A and the second planar heating body 16B are the same as those of the first gold heating element. Various selections can be made to correspond to the desired temperature arrangement pattern required by the mold surface of the mold member 12A or the second mold member 12B.

１，１０１…熱可塑性材料のプレス成形装置、１０…熱可塑性材料、１２…金型、１２Ａ…第１の金型部材、１２Ｂ…第２の金型部材、１３…金型保持部、１３Ａ…第１の金型保持部材、１３Ｂ…第２の金型保持部材、１４…金型支持部、１４ａ…第１の金型支持軸、１４ｂ…第２の金型支持軸、１５…中空断熱部、１５Ａ…第１の中空断面部材、１５Ｂ…第２の中空断面部材、ＬＤ…押圧力検出器、１６…面状加熱部、１６Ａ…第１の面状加熱体、１６Ｂ…第２の面状加熱体、ＨＣ…熱伝導部材，ＣＳ…冷却部，ＭＢ…本体、ＥＴ１，ＥＴ２…電極部、ＨＰ…電気抵抗発熱部、Ｔ１，Ｔ２…電極、ＴＯ１，ＴＯ２…電極露出開口、ＯＴ１，ＯＴ２…外部接続端子、１８…中空部材、２０…不活性ガス供給部、２０ａ…真空ポンプ、２０ｂ…不活性ガス供給源、２２…外側加熱器、２４…固定フレーム、２６…移動案内部、２８…金型支持軸駆動機構、２８ａ…上下方向移動軸，２８ｂ…回転力供給源，２８ｃ…駆動力伝達部，３０…中空部材駆動部，３０ａ…シリンダ，３０ｂ…ピストン、３２…金型固定部、３２Ａ…第１の金型固定部材、３２Ｂ…第２の金型固定部材、３２ｄ…第１固定部材、３２ｅ…第２固定部材、３２ｆ…面状加熱体格納凹部、３４…制御装置、ＣＴ…中心部温度、ＰＴ…外周部温度、
５０…ハウジング、ＩＯ…プレス成形素材搬入開口、５６Ａ…プレス成形素材搬入部材、ＤＯ…プレス成形物搬出開口、５６Ｂ…プレス成形物搬出部材、５８Ａ…プレス成形素材搬入開口開閉部材、５８Ｂ…プレス成形物搬出開口開閉部材、Ｇ…プレス成形物、
１６０Ａ…面状加熱体、ＭＢ１０…本体、ＥＴ１０，ＥＴ１２，ＥＴ１３，ＥＴ１４…電極部、ＨＰ１…中心部電気抵抗発熱部、ＨＰ２…周辺部電気抵抗発熱部、Ｔ１０，Ｔ１２，Ｔ１３，Ｔ１４…電極、ＴＯ１０，ＴＯ１２，ＴＯ１３，ＴＯ１４…電極露出開口、ＥＣ１，ＥＣ２…電気接続パターン。 DESCRIPTION OF SYMBOLS 1,101 ... Thermoplastic material press molding apparatus, 10 ... Thermoplastic material, 12 ... Mold, 12A ... First mold member, 12B ... Second mold member, 13 ... Mold holding part, 13A ... 1st mold holding member, 13B ... 2nd mold holding member, 14 ... Mold support part, 14a ... 1st mold support shaft, 14b ... 2nd mold support shaft, 15 ... Hollow heat insulation part , 15A ... first hollow cross-section member, 15B ... second hollow cross-section member, LD ... pressing force detector, 16 ... planar heating section, 16A ... first planar heating body, 16B ... second planar shape Heating element, HC ... heat conduction member, CS ... cooling part, MB ... main body, ET1, ET2 ... electrode part, HP ... electric resistance heating part, T1, T2 ... electrode, TO1, TO2 ... electrode exposure opening, OT1, OT2 ... External connection terminal, 18 ... hollow member, 20 ... inert gas supply unit, 20a ... vacuum pump, 20b ... Active gas supply source, 22 ... outside heater, 24 ... fixed frame, 26 ... moving guide, 28 ... mold support shaft drive mechanism, 28a ... vertical moving shaft, 28b ... rotation force supply source, 28c ... drive force transmission 30, hollow member drive unit, 30 a, cylinder, 30 b, piston, 32, mold fixing part, 32 A, first mold fixing member, 32 B, second mold fixing member, 32 d, first fixing member 32e ... second fixing member, 32f ... planar heating element storage recess, 34 ... control device, CT ... center temperature, PT ... outer periphery temperature,
DESCRIPTION OF SYMBOLS 50 ... Housing, IO ... Press molding material carrying-in opening, 56A ... Press molding material carrying-in member, DO ... Press molding material carrying-out opening, 56B ... Press molding material carrying-out member, 58A ... Press molding material carrying-in opening opening / closing member, 58B ... Press molding Material opening opening opening and closing member, G ... Press molded product,
160A ... planar heating element, MB10 ... main body, ET10, ET12, ET13, ET14 ... electrode part, HP1 ... central part electric resistance heating part, HP2 ... peripheral part electric resistance heating part, T10, T12, T13, T14 ... electrode, TO10, TO12, TO13, TO14 ... Electrode exposure openings, EC1, EC2 ... Electrical connection patterns.

Claims (10)

熱可塑性材料を所望の形状に押圧成形する金型面をそれぞれ有する複数の金型部材で構成される金型と、
複数の金型部材をそれぞれ固定する複数の金型固定部材で構成される金型固定部と、
前記複数の金型固定部材を介して前記複数の金型部材をそれぞれ支持すると共に、相互に接近及び離反させる金型支持部と、
前記熱可塑性材料を成形可能温度に加熱する面状加熱体と、を備え、
前記面状加熱体が前記金型固定部の内部に設けられていて、
前記金型固定部材は、前記金型部材に接触固定される固定面に平行な分割面で分離可能な複数の固定部材により構成されており、
前記面状加熱体は、電気抵抗発熱部と複数の電極とで構成され、
前記複数の電極と前記複数の固定部材を分離可能に相互に固定する複数の締結部材が、電気的に接続されることにより外部接続端子を構成している、
ことを特徴とする熱可塑性材料のプレス成形装置。 A mold composed of a plurality of mold members each having a mold surface for press-molding a thermoplastic material into a desired shape;
And the mold fixing unit is composed plurality of die member to a plurality of die fastening members for fixing respectively,
A mold support part for supporting the plurality of mold members via the plurality of mold fixing members, and for approaching and separating from each other, and
A sheet heating body for heating the thermoplastic material to a moldable temperature,
The planar heating body is provided inside the mold fixing part ,
The mold fixing member is composed of a plurality of fixing members that can be separated by a dividing surface parallel to a fixing surface that is fixed in contact with the mold member,
The planar heater is composed of an electric resistance heating part and a plurality of electrodes,
A plurality of fastening members that fix the plurality of electrodes and the plurality of fixing members to each other in a separable manner constitute an external connection terminal by being electrically connected.
A thermoplastic material press-molding apparatus. 前記複数の固定部材のうち少なくとも一つの固定部材の分割面に前記面状加熱体を格納する面状加熱体格納凹部を設けたことを特徴とする請求項１に記載の熱可塑性材料のプレス成形装置。 The press molding of the thermoplastic material according to claim 1 , wherein a planar heating body storage recess for storing the planar heating body is provided on a split surface of at least one of the plurality of fixing members. apparatus. 前記面状加熱体の熱を前記固定部材に伝達させる熱伝導部材を前記面状加熱体格納凹部に配置したことを特徴とする請求項２に記載の熱可塑性材料のプレス成形装置。 The press molding apparatus for a thermoplastic material according to claim 2, wherein a heat conductive member for transmitting heat of the planar heating body to the fixing member is disposed in the planar heating body storage recess . 前記面状加熱体の前記電気抵抗発熱部は、前記面状加熱体により加熱される前記金型部材の金型面における所望の温度分布に対応したパターン形状を有している、ことを特徴とする請求項１乃至３のいずれか１項に記載の熱可塑性材料のプレス成形装置。 The electric resistance heat generating portion of the planar heating body has a pattern shape corresponding to a desired temperature distribution on a mold surface of the mold member heated by the planar heating body. The thermoplastic material press molding apparatus according to any one of claims 1 to 3 . 前記面状加熱体は、複数の電気抵抗発熱部と複数の電極とで構成され、
前記複数の電極と前記複数の固定部材を分離可能に相互に固定する複数の締結部材が、電気的に接続されることにより外部接続端子を構成している、ことを特徴とする請求項１乃至３のいずれか１項に記載の熱可塑性材料のプレス成形装置。 The planar heating body is composed of a plurality of electric resistance heating portions and a plurality of electrodes,
A plurality of fastening members for fixing to each other in a separable said plurality of fixed member and the plurality of electrodes constitute the external connection terminals by being electrically connected, 1 to claim, characterized in that press forming apparatus of the thermoplastic material according to any one of 3. 前記面状加熱体の前記複数の電気抵抗発熱部は、前記面状加熱体により加熱される前記金型部材の金型面における所望の温度分布に対応した複数のパターン形状を有している、ことを特徴とする請求項５に記載の熱可塑性材料のプレス成形装置。 The plurality of electric resistance heat generating portions of the planar heating body have a plurality of pattern shapes corresponding to desired temperature distributions on the mold surface of the mold member heated by the planar heating body. The press molding apparatus for a thermoplastic material according to claim 5. 前記面状加熱体の前記複数の電気抵抗発熱部は、前記金型部材の金型面の中心部に対応した中心部電気抵抗発熱部と、前記金型部材の金型面の周辺部に対応した周辺部電気抵抗発熱部と、を備えている、ことを特徴とする請求項６に記載の熱可塑性材料のプレス成形装置。 The plurality of electric resistance heat generating portions of the planar heating body correspond to a central electric resistance heat generating portion corresponding to a central portion of the mold surface of the mold member and a peripheral portion of the mold surface of the mold member. The thermoplastic material press-molding apparatus according to claim 6 , further comprising: a peripheral electric resistance heat generating portion . 前記中心部電気抵抗発熱部は前記金型部材の金型面の中心から相互に正反対の周方向に螺旋状に延出し両方の延出端に１対の電極を有しており、
前記周辺部電気抵抗発熱部は、前記中心部電気抵抗発熱部の周囲において前記中心部電気抵抗発熱部の直径方向に相互に離間した２つの位置から前記中心部電気抵抗発熱部の周囲を相互に同じ周方向に螺旋状に延出された２つの部分を備え、２つの部分の夫々の内端は相互に電気的に接続されていて、２つの部分の夫々の外端は周辺部電気抵抗発熱部の為の１対の電極を有している、
ことを特徴とする請求項７に記載の熱可塑性材料のプレス成形装置。 The central electric resistance heating part extends in a spiral shape from the center of the mold surface of the mold member in the circumferential direction opposite to each other and has a pair of electrodes at both extending ends;
The peripheral electric resistance heat generating portion is arranged around the central electric resistance heat generating portion from two positions spaced from each other in the diameter direction of the central electric resistance heat generating portion around the central electric resistance heat generating portion. It has two parts spirally extending in the same circumferential direction, and the inner ends of the two parts are electrically connected to each other, and the outer ends of the two parts are heated at the peripheral portion of the electrical resistance. Having a pair of electrodes for the part,
The press molding apparatus for a thermoplastic material according to claim 7. 前記複数の固定部材の少なくとも一つに前記複数の固定部材を選択的に冷却させる冷却部を設けたことを特徴とする請求項１乃至７のいずれか１項に記載の熱可塑性材料のプレス成形装置。 The thermoplastic material press molding according to any one of claims 1 to 7 , wherein at least one of the plurality of fixing members is provided with a cooling portion that selectively cools the plurality of fixing members. apparatus. 前記冷却部は、前記固定部材に形成された複数の冷却媒体通路であることを特徴とする請求項９に記載の熱可塑性材料のプレス成形装置。 The thermoplastic material press molding apparatus according to claim 9, wherein the cooling unit is a plurality of cooling medium passages formed in the fixing member .
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