JP2651273B2 - Press molding die structure - Google Patents
Press molding die structureInfo
- Publication number
- JP2651273B2 JP2651273B2 JP29523390A JP29523390A JP2651273B2 JP 2651273 B2 JP2651273 B2 JP 2651273B2 JP 29523390 A JP29523390 A JP 29523390A JP 29523390 A JP29523390 A JP 29523390A JP 2651273 B2 JP2651273 B2 JP 2651273B2
- Authority
- JP
- Japan
- Prior art keywords
- sleeve
- mold member
- die
- molding
- press
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Forging (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明はプレス成形用型の構造に関し、特に成形品の
厚み精度及び表面状態を良好に維持し型寿命を長く維持
するためのプレス成形用型の構造に関する。本発明は、
例えば光学機能面を有する光学素子を成形用素材からプ
レスにより迅速に製造するための型に好適に適用するこ
とができる。Description: FIELD OF THE INVENTION The present invention relates to the structure of a press-molding die, and particularly to a press-molding die for maintaining a good thickness accuracy and surface condition of a molded product and a long mold life. Regarding the structure of the mold. The present invention
For example, it can be suitably applied to a mold for quickly manufacturing an optical element having an optical function surface from a molding material by pressing.
［従来の技術及び発明が解決しようとする課題］ 近年、所定の表面精度を有する成形用型内に光学素子
成形用の素材たとえばある程度の形状及び表面精度に予
備成形されたガラスブランクを収容して加熱下でプレス
成形することにより、研削及び研摩等の後加工を不要と
した。高精度光学機能面を有する光学素子を製造する方
法が開発されている。[Problems to be Solved by Related Art and Invention] In recent years, a material for optical element molding, for example, a glass blank preformed to a certain shape and surface accuracy has been housed in a molding die having a predetermined surface accuracy. By press-forming under heating, post-processing such as grinding and polishing is not required. A method for manufacturing an optical element having a high-precision optical function surface has been developed.
このプレス成形法では、少なくとも１対の成形用型部
材を対向方向に相対的に往復移動可能な様に配置し、少
なくとも上記１対の型部材を含む部材により形成される
キャビティ内に成形用素材を導入し、型部材の酸化防止
のため雰囲気を非酸化性雰囲気たとえば窒素雰囲気とし
て、成形可能温度たとえば成形用素材が108〜1012ポア
ズとなる温度まで型部材を加熱し、型を閉じ適宜の時間
プレスして型部材表面形状を成形用素材表面に転写し、
そして型部材温度を成形用素材のガラス転移温度より十
分低い温度まで冷却し、プレス圧力を除去し、型を開い
て成形済光学素子を取出す。In this press molding method, at least a pair of molding die members are arranged so as to be relatively reciprocable in a facing direction, and a molding material is placed in a cavity formed by a member including at least the pair of molding members. introducing, as a non-oxidizing atmosphere of nitrogen atmosphere for example atmosphere for preventing oxidation of the mold members, moldable temperature e.g. molding material by heating the mold member to a temperature at which a 10 8 to 10 12 poises, suitably close the mold Press for a time to transfer the surface shape of the mold member to the surface of the molding material,
Then, the temperature of the mold member is cooled to a temperature sufficiently lower than the glass transition temperature of the molding material, the pressing pressure is removed, and the mold is opened to take out the molded optical element.
以上の様なプレス成形法によれば、従来極めて高コス
トであった非球面レンズ等を比較的低コストで製造する
ことができる。According to the press molding method as described above, it is possible to manufacture an aspherical lens or the like, which was conventionally extremely expensive, at a relatively low cost.
ところで、上記プレスのための型においては、成形品
の肉厚（即ち、上記１対の成形用型部材たる上型部材と
下型部材との対向方向に相当する方向の厚さ）は上型部
材と下型部材とを相対的に移動させてプレスする際の移
動停止位置により設定される。従来は、該停止位置の設
定のために、上型部材の転写成形面の外周の輪帯状縁部
（上型部材の転写成形面と共通の球面状または平面状の
縁部）をスリーブ状胴型部材の輪帯状上端部（上型部材
の転写成形面に対応する球面状または平面状の上端部）
に突き当てることがなされている（例えば特開昭60−51
623号公報参照）。By the way, in the mold for pressing, the thickness of the molded product (that is, the thickness in the direction corresponding to the direction in which the upper mold member and the lower mold member, which are the pair of molding mold members, oppose each other) is the upper mold. It is set by the movement stop position when the member and the lower mold member are relatively moved and pressed. Conventionally, in order to set the stop position, an annular orbicular edge on the outer periphery of the transfer molding surface of the upper mold member (a spherical or planar edge common to the transfer molding surface of the upper mold member) is used as a sleeve-shaped cylinder. Ring-shaped upper end of mold member (spherical or flat upper end corresponding to the transfer molding surface of upper mold member)
(See, for example, JP-A-60-51).
No. 623).
しかし、上記従来例では、胴型部材の輪帯状上端部と
上型部材の輪帯状縁部とが突き当てられ型キャビティが
密閉された状態でプレスが終了するために、成形用素材
の加熱により発生する蒸発成分（鉛、アルカリ等）がキ
ャビティ内に閉じ込められ成形品や型部材の表面に付着
する。これにより、成形品の表面状態が劣化したり（例
えば透明度の低下）、型部材の表面状態が劣化し繰り返
し成形の後には成形品の表面状態も劣化することがあ
る。However, in the above-mentioned conventional example, the pressing is completed in a state where the annular upper end of the body mold member and the annular edge of the upper mold member are abutted and the mold cavity is sealed, so that the molding material is heated by heating. The generated evaporation components (such as lead and alkali) are confined in the cavity and adhere to the surface of the molded product or the mold member. As a result, the surface condition of the molded product may be deteriorated (for example, the transparency is reduced), the surface condition of the mold member may be deteriorated, and the surface condition of the molded product may be deteriorated after repeated molding.
そこで、本発明は、以上の様な従来技術の問題点に鑑
み、プレス時における上型部材と下型部材との間の相対
的移動の停止位置の設定を常に正確に行い成形品の厚み
精度を良好に維持しつつ、成形用素材からの蒸発成分を
型キャビティ外へと逃がして良好な表面状態の成形品を
得、更に型寿命を長く維持することのできる、プレス成
形用型の構造を提供することを目的とするものである。In view of the above problems of the prior art, the present invention always accurately sets the stop position of the relative movement between the upper die member and the lower die member at the time of pressing and performs the thickness accuracy of the molded product. The structure of the press molding die, which allows the evaporation component from the molding material to escape to the outside of the mold cavity to obtain a molded product with a good surface condition while maintaining the mold life, and to maintain the mold life longer. It is intended to provide.
［課題を解決するための手段］ 本発明によれば、上記目的を達成するものとして、 上型部材と下型部材とスリーブとを有し、上記下型部
材が上記スリーブ内にて長手方向に摺動可能に配置され
ているプレス成形用型の構造において、 上記スリーブの輪帯状上端部の一部が上記上型部材の
転写成形面と共通の球面状または平面状の輪帯状縁部に
突き当てられるようになっており、上記スリーブの上端
部の他部は上記突き当て状態にて上記上型部材輪帯状縁
部との間に間隙を形成する切欠部とされていることを特
徴とする、プレス成形用型の構造、 が提供される。[Means for Solving the Problems] According to the present invention, there is provided, as a means for achieving the above object, an upper mold member, a lower mold member, and a sleeve, wherein the lower mold member extends in the sleeve in a longitudinal direction. In the press-molding die structure slidably disposed, a part of the annular upper end of the sleeve projects into a spherical or planar annular edge common to the transfer molding surface of the upper die member. The other end of the upper end of the sleeve is a notch that forms a gap between the upper end member and the zonal edge in the abutting state. , And a structure of a press mold.
本発明においては、上記下型部材の上記スリーブに対
するスリーブ長手方向の周りの周方向回動が係止されて
おり、上記スリーブの切欠部が周方向に均等に複数設け
られており、且つ上型部材輪帯状縁部にはスリーブの複
数の切欠部のうちの１つと係合せしめられる突部が設け
られている、態様がある。In the present invention, the rotation of the lower mold member in the circumferential direction around the longitudinal direction of the sleeve with respect to the sleeve is locked, a plurality of notches in the sleeve are provided evenly in the circumferential direction, and the upper mold There is an embodiment in which the member orbicular rim is provided with a protrusion which is engaged with one of the plurality of notches of the sleeve.
また、本発明によれば、上記目的を達成するものとし
て、 上型部材と下型部材とスリーブとを有し、上記下型部
材が上記スリーブ内にて長手方向に摺動可能に配置され
ているプレス成形用型の構造において、 上記上型部材の転写成形面と共通の球面状または平面
状の輪帯状縁部の一部が上記スリーブの輪帯状上端部に
突き当てられるようになっており、上記上型部材の輪帯
状縁部の他部は上記突き当て状態にて上記スリーブ上端
部との間に間隙を形成する切欠部とされていることを特
徴とする、プレス成形用型の構造、 が提供される。According to the present invention, to achieve the above object, there is provided an upper mold member, a lower mold member, and a sleeve, wherein the lower mold member is disposed slidably in the sleeve in the longitudinal direction. In the structure of the press molding die, a part of a spherical or planar annular zone common to the transfer molding surface of the upper mold member is abutted against the annular upper end of the sleeve. The other part of the annular edge of the upper die member is a cutout portion that forms a gap between the upper die member and the upper end of the sleeve in the abutting state. , Are provided.
本発明においては、上記下型部材の上記スリーブに帯
するスリーブ長手方向の周りの周方向回動が係止されて
おり、上記上型部材の切欠部が周方向に均等に複数設け
られており、且つスリーブ上端部には上型部材の複数の
切欠部のうちの１つと係合せしめられる突部が設けられ
ている、態様がある。In the present invention, circumferential rotation of the lower mold member around the sleeve in the longitudinal direction of the sleeve is locked, and a plurality of notches in the upper mold member are provided evenly in the circumferential direction. In addition, there is a mode in which a protrusion is provided at the upper end of the sleeve so as to be engaged with one of the plurality of cutouts of the upper die member.
［実施例］ 以下、本発明の実施例について図面を参照しながら説
明する。尚、以下の実施例は光学レンズのプレス成形に
適用された場合のものである。Example An example of the present invention will be described below with reference to the drawings. The following examples are applied to press molding of an optical lens.
第１図は本発明によるプレス成形用型の構造の第１の
実施例を示す縦断面図であり、第２図はその正面図であ
る。尚、第１図は第２図のＩ−Ｉ断面に相当する。FIG. 1 is a longitudinal sectional view showing a first embodiment of the structure of a press mold according to the present invention, and FIG. 2 is a front view thereof. FIG. 1 corresponds to the II section of FIG.
これらの図において、２は下型部材であり、その上面
はレンズの第１の光学機能面を転写形成するために所要
の表面精度に仕上げられた成形面である。この成形面は
非球面形状であってもよい。４は上型部材であり、その
下面はレンズの第２の光学機能面を転写形成するために
所要の表面精度に仕上げられた成形面である。この成形
面は球面形状または平面形状である。これら２つの型部
材2,4が１対の型部材を構成している。In these figures, reference numeral 2 denotes a lower mold member, the upper surface of which is a molding surface finished to a required surface accuracy for transferring and forming the first optical function surface of the lens. This molding surface may have an aspherical shape. Reference numeral 4 denotes an upper mold member, the lower surface of which is a molding surface finished to a required surface accuracy for transferring and forming the second optical function surface of the lens. This molding surface is spherical or planar. These two mold members 2 and 4 constitute a pair of mold members.
６はスリーブであり、該スリーブにより上記下型部材
２が上下方向に移動可能に支持されている。Reference numeral 6 denotes a sleeve, and the lower mold member 2 is supported by the sleeve so as to be vertically movable.
スリーブ６の下部には支持プレート８が固定されてい
る。そして、上記下型部材２は該支持プレート８により
下方への移動を制限されている。スリーブ６に付設され
ているピン７の下部が、下型部材２の側面に形成されて
いる上下方向溝と係合しており、かくして下型部材２が
スリーブ６に対しスリーブ長手方向の周りに回動しない
様になっている。A support plate 8 is fixed to a lower portion of the sleeve 6. The lower die member 2 is restricted from moving downward by the support plate 8. The lower part of the pin 7 attached to the sleeve 6 is engaged with the vertical groove formed on the side surface of the lower mold member 2, so that the lower mold member 2 is moved relative to the sleeve 6 around the longitudinal direction of the sleeve. It does not rotate.
Ｇは成形用素材である。 G is a molding material.
第３図は上記上型部材４及び成形用素材Ｇの図示を省
略した本実施例の斜視図である。FIG. 3 is a perspective view of the present embodiment in which the upper mold member 4 and the molding material G are not shown.
スリーブ６の輪帯状上端部には３つの切欠部10a,10b,
10cが形成されている。そして、12a,12b,12cは輪帯状上
端部の非切欠部であり、その上端面は上記上型部材４の
成形面に対応する形状をもち、プレス時に上記上型部材
４の成形面の外周の輪帯状縁部に突き当てられる様にな
っている。上記切欠部10a,10b,10c及び非切欠部12a,12
b,12cは均等な周方向長さを有する。At the annular upper end of the sleeve 6, three notches 10a, 10b,
10c is formed. Reference numerals 12a, 12b, and 12c denote non-notched portions at the upper end of the annular shape, and the upper end surface has a shape corresponding to the molding surface of the upper die member 4, and the outer periphery of the molding surface of the upper die member 4 during pressing. To be abutted against the ring-shaped edge portion. The notches 10a, 10b, 10c and the non-notches 12a, 12
b and 12c have a uniform circumferential length.
第４図は本実施例の上型部材４を示す斜視図である。 FIG. 4 is a perspective view showing the upper mold member 4 of this embodiment.
上型部材４の成形面の外周の輪帯状縁部に、スリーブ
６の上端部の切欠部に対応する周方向長さの突起５が設
けられている。A protrusion 5 having a circumferential length corresponding to the cutout at the upper end of the sleeve 6 is provided on an annular edge on the outer periphery of the molding surface of the upper die member 4.
本実施例は以上の如くであるので、プレス時には、第
１図に示されている様に、上型部材４の成形面外周の輪
帯状縁部がスリーブ６の上端部の非切欠部12a,12b,12c
に突き当てられて成形品の厚みが設定される。そして、
プレス時の高温により成形用素材Ｇから発生した蒸発成
分は、スリーブ６の上端部の切欠部10a,10b,10cと上型
部材４の成形面外周の輪帯状縁部との間隙から型外へと
逃げるので、繰り返し成形の後においても成形品及び型
部材の表面状態が良好に維持され、型部材の寿命も長く
なる。Since the present embodiment is as described above, at the time of pressing, as shown in FIG. 1, the orbicular edge of the outer peripheral surface of the molding surface of the upper die member 4 has the non-notched portion 12a, 12b, 12c
And the thickness of the molded product is set. And
Evaporation components generated from the molding material G due to the high temperature during the pressing go out of the mold from the gap between the cutouts 10a, 10b, 10c at the upper end of the sleeve 6 and the annular edge around the molding surface of the upper mold member 4. Therefore, even after repeated molding, the surface condition of the molded article and the mold member is favorably maintained, and the life of the mold member is prolonged.
尚、上記上型部材４に設けられる突起５は、スリーブ
６の上端部の３つの切欠部10a,10b,10cのうちの１つ
（第１図及び第２図では10a）と係合せしめられ、かく
して上型部材４がスリーブ６に対しスリーブ長手方向の
周りに回動しない様になっている。但し、この係合によ
っても、劇間が塞がれることはない。この係合の選択
は、予め３つの切欠部10a,10b,10cのそれぞれとの組み
合わせについて試験的にプレスを行い、成形品の光学的
性能（特にレンズのコバ肉厚の不均一に基づく片ボケ）
を調べ、最も光学的性能の良好となる組み合わせのもの
選ぶことにより行う。The protrusion 5 provided on the upper die member 4 is engaged with one of the three notches 10a, 10b, and 10c (10a in FIGS. 1 and 2) at the upper end of the sleeve 6. Thus, the upper mold member 4 does not rotate with respect to the sleeve 6 around the longitudinal direction of the sleeve. However, this play does not block the play. The selection of the engagement is made by preliminarily pressing the combination with each of the three notches 10a, 10b, and 10c in a trial manner, and the optical performance of the molded product (particularly, one-sided blurring based on unevenness of the edge thickness of the lens). )
And selecting a combination that gives the best optical performance.
また、本実施例では、下型部材２がスリーブ６に対し
上下方向に移動可能とされているので、プレス後の冷却
過程で成形品の収縮があっても、該下型部材２が追従移
動でき、従って成形品の面精度を良好なものとすること
ができる。Further, in this embodiment, since the lower mold member 2 can be moved in the vertical direction with respect to the sleeve 6, even if the molded product contracts in the cooling process after pressing, the lower mold member 2 can follow. Therefore, the surface accuracy of the molded product can be improved.
第５図は本発明によるプレス成形用型の構造の第２の
実施例を示す縦断面図であり、第６図はその正面図であ
る。尚、第５図は第６図のＶ−Ｖ断面に相当する。これ
らの図において、上記第１図〜第４図におけると同様の
部材には同一の符号が付されている。第７図は本実施例
の上型部材４を示す斜視図であり、第８図は上型部材４
及び成形用素材Ｇの図示を省略した本実施例の斜視図で
ある。FIG. 5 is a longitudinal sectional view showing a second embodiment of the structure of the press mold according to the present invention, and FIG. 6 is a front view thereof. FIG. 5 corresponds to a section taken along line VV of FIG. In these drawings, the same members as those in FIGS. 1 to 4 are denoted by the same reference numerals. FIG. 7 is a perspective view showing the upper mold member 4 of the present embodiment, and FIG.
FIG. 2 is a perspective view of the present embodiment in which the illustration of a molding material G is omitted.
本実施例では、上型部材４の成形面外周の輪帯状縁部
には３つの切欠部14a,14b,14cが形成されている。そし
て、16a,16b,16cは輪帯状縁部の非切欠部であり、プレ
ス時にはスリーブ６の輪帯状上端部に突き当てられる様
になっている。上記切欠部14a,14b,14c及び非切欠部16
a,16b,16cは均等な周方向長さを有する。In this embodiment, three notches 14a, 14b, and 14c are formed in the annular edge on the outer periphery of the molding surface of the upper die member 4. Reference numerals 16a, 16b, and 16c denote non-cut portions of the ring-shaped edge portion, which are pressed against the ring-shaped upper end of the sleeve 6 during pressing. The notches 14a, 14b, 14c and the non-notches 16
a, 16b, 16c have a uniform circumferential length.
スリーブ６の輪帯状上端部に上型部材４の成形面外周
の輪帯状縁部の切欠部に対応する周方向長さの突起９が
設けられている。A protrusion 9 having a circumferential length corresponding to a cutout of an annular edge on the outer periphery of the molding surface of the upper die member 4 is provided at an annular upper end of the sleeve 6.
本実施例は、上記第１の実施例において上型部材４の
成形面外周の輪帯状縁部とスリーブ６の上端部との機能
が逆になったものに相当し、その作用効果は第１の実施
例と同等である。This embodiment corresponds to the first embodiment in which the function of the annular edge on the outer periphery of the molding surface of the upper die member 4 and the function of the upper end of the sleeve 6 are reversed. This is equivalent to the embodiment.
［発明の効果］ 以上説明した様に、本発明のプレス成形用型の構造に
よれば、胴型部材の輪帯状上端部及び上型部材の成形面
外周の輪帯状縁部のうちの一方の切欠部を設けており、
上型部材をスリーブに突き当てた状態にて間隙が形成さ
れるので、成形品の厚みが正確に設定されるとともに、
プレス時の高温により成形用素材から発生した蒸発成分
が該間隙から型外へと逃げ、繰り返し成形の後において
も成形品及び型部材の表面状態が良好に維持され、型部
材の寿命も長くなる。[Effects of the Invention] As described above, according to the structure of the press-molding die of the present invention, one of the annular upper end of the body member and the annular edge of the outer periphery of the molding surface of the upper mold member. Notch is provided,
Since the gap is formed in a state where the upper mold member is in contact with the sleeve, the thickness of the molded product is accurately set,
Evaporation components generated from the molding material by the high temperature during pressing escape from the gap to the outside of the mold, and the surface condition of the molded article and the mold member is maintained well even after repeated molding, and the life of the mold member is prolonged. .
第１図は本発明によるプレス成形用型の構造の第１の実
施例を示す縦断面図であり、第２図はその正面図であ
る。第３図は上型部材及び成形用素材の図示を省略した
本実施例の斜視図であり、第４図は本実施例の上型部材
を示す斜視図である。 第５図は本発明によるプレス成形用型の構造の第２の実
施例を示す縦断面図であり、第６図はその正面図であ
る。第７図は本実施例の上型部材を示す斜視図であり、
第８図は上型部材及び成形用素材の図示を省略した本実
施例の斜視図である。 2:下型部材、4:上型部材、 5,9:突起、6:スリーブ、 7:ピン、8:支持プレート、 10a〜10c:スリーブ上端部の切欠部、 12a〜12c:スリーブ上端部の非切欠部、 14a〜14c:上型部材成形面外周の輪帯状縁部の切欠部、 16a〜16c:上型部材成形面外周の輪帯状縁部の非切欠
部、 G:成形用素材。FIG. 1 is a longitudinal sectional view showing a first embodiment of the structure of a press mold according to the present invention, and FIG. 2 is a front view thereof. FIG. 3 is a perspective view of the present embodiment in which the illustration of the upper mold member and the molding material is omitted, and FIG. 4 is a perspective view showing the upper mold member of the present embodiment. FIG. 5 is a longitudinal sectional view showing a second embodiment of the structure of the press mold according to the present invention, and FIG. 6 is a front view thereof. FIG. 7 is a perspective view showing the upper mold member of the present embodiment,
FIG. 8 is a perspective view of the present embodiment in which the illustration of the upper mold member and the molding material is omitted. 2: Lower mold member, 4: Upper mold member, 5, 9: Projection, 6: Sleeve, 7: Pin, 8: Support plate, 10a to 10c: Notch at upper end of sleeve, 12a to 12c: At upper end of sleeve Non-notched portions, 14a to 14c: notched portions of the ring-shaped edge on the outer periphery of the upper die member forming surface, 16a to 16c: non-notched portions of the annular edge on the outer periphery of the upper die member forming surface, G: molding material.
Claims (4)
上記下型部材が上記スリーブ内にて長手方向に摺動可能
に配置されているプレス成形用型の構造において、 上記スリーブの輪帯状上端部の一部が上記上型部材の転
写成形面と共通の球面状または平面状の輪帯状縁部に突
き当てられるようになっており、上記スリーブの上端部
の他部は上記突き当て状態にて上記上型部材輪帯状縁部
との間に間隙を形成する切欠部とされていることを特徴
とする、プレス成形用型の構造。An upper mold member, a lower mold member, and a sleeve,
In the structure of the press molding die in which the lower die member is slidably disposed in the sleeve in the longitudinal direction, a part of the annular upper end of the sleeve is common to the transfer molding surface of the upper die member. Of the sleeve, and the other end of the upper end of the sleeve has a gap between the upper end member and the annular zone in the abutting state. A structure of a die for press molding, characterized in that the notch is formed.
ーブ長手方向の周りの周方向回動が係止されており、上
記スリーブの切欠部が周方向に均等に複数設けられてお
り、且つ上型部材輪帯状縁部にはスリーブの複数の切欠
部のうちの１つと係合せしめられる突部が設けられてい
る、請求項１に記載のプレス成形用型の構造。2. The lower mold member is locked against the sleeve in a circumferential direction around the longitudinal direction of the sleeve, and a plurality of notches of the sleeve are provided evenly in the circumferential direction. The structure of the press-molding die according to claim 1, wherein the member ring-shaped edge portion is provided with a protrusion that is engaged with one of the plurality of cutout portions of the sleeve.
上記下型部材が上記スリーブ内にて長手方向に摺動可能
に配置されているプレス成形用型の構造において、 上記上型部材の転写成形面と共通の球面状または平面状
の輪帯状縁部の一部が上記スリーブの輪帯状上端部に突
き当てられるようになっており、上記上型部材の輪帯状
縁部の他部は上記突き当て状態にて上記スリーブ上端部
との間に間隙を形成する切欠部とされていることを特徴
とする、プレス成形用型の構造。3. An apparatus according to claim 2, further comprising an upper mold member, a lower mold member, and a sleeve.
In a press-molding die structure in which the lower die member is disposed so as to be slidable in the longitudinal direction within the sleeve, a spherical or planar ring-shaped edge common to the transfer molding surface of the upper die member. A part of the upper end of the upper die member, the other end of the annular edge of the upper mold member in the abutting state between the upper end of the sleeve in the gap. A structure of a die for press molding, characterized in that the notch is formed.
ーブ長手方向の周りの周方向回動が係止されており、上
記上型部材の切欠部が周方向に均等に複数設けられてお
り、且つスリーブ上端部には上型部材の複数の切欠部の
うちの１つと係合せしめられる突部が設けられている、
請求項３に記載のプレス成形用型の構造。4. A rotation of the lower mold member in a circumferential direction around the longitudinal direction of the sleeve with respect to the sleeve is locked, a plurality of notches of the upper mold member are provided evenly in a circumferential direction, and A protrusion is provided at the upper end of the sleeve to be engaged with one of the notches of the upper die member.
The structure of the press mold according to claim 3.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29523390A JP2651273B2 (en) | 1990-11-02 | 1990-11-02 | Press molding die structure |
| US07/785,766 US5211969A (en) | 1990-11-02 | 1991-10-31 | Mold for press molding of optical element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29523390A JP2651273B2 (en) | 1990-11-02 | 1990-11-02 | Press molding die structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04170333A JPH04170333A (en) | 1992-06-18 |
| JP2651273B2 true JP2651273B2 (en) | 1997-09-10 |
Family
ID=17817939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29523390A Expired - Fee Related JP2651273B2 (en) | 1990-11-02 | 1990-11-02 | Press molding die structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2651273B2 (en) |
-
1990
- 1990-11-02 JP JP29523390A patent/JP2651273B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04170333A (en) | 1992-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5211969A (en) | Mold for press molding of optical element | |
| JP2651273B2 (en) | Press molding die structure | |
| JP2000095532A (en) | Press-formed optical element, its production, die for press-forming optical element and device for press- forming optical element | |
| JP3134581B2 (en) | Mold for optical element molding | |
| JP3875306B2 (en) | Method for manufacturing mold for molding optical element and method for molding optical element | |
| JP2001270724A (en) | Optical lens and metal mold for forming the same | |
| JPH07215721A (en) | Lens forming device | |
| JP3209722B2 (en) | Method for molding optical element and optical element | |
| JPH0645466B2 (en) | Method for molding optical glass parts | |
| JPH11157853A (en) | Method for forming optical element and forming mold therefor | |
| JP3130621B2 (en) | Optical element molding method | |
| JP2651274B2 (en) | Press molding die structure | |
| JPH0476932B2 (en) | ||
| JP3883634B2 (en) | Mold for press molding optical elements | |
| JP2501588B2 (en) | Mold for press molding optical glass element and molding method thereof | |
| JPH0692654A (en) | Method for molding glass lens | |
| JPH0474726A (en) | Structure press-forming mold | |
| JPH0585747A (en) | Mold for molding glass lens and production of glass lens | |
| JP2785683B2 (en) | Optical lens molding machine | |
| JP4436561B2 (en) | Optical element manufacturing method | |
| KR0125997Y1 (en) | A mould for lens | |
| JPH11130450A (en) | Production of optical element and mold for forming optical element | |
| JPH02137740A (en) | Molding of optical element | |
| JPH0712940B2 (en) | Glass lens molding method | |
| JPH0570155A (en) | Mold for glass lens molding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |