JP2006306643A - Method and device for cleaning mold for optical glass element - Google Patents

Method and device for cleaning mold for optical glass element Download PDF

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JP2006306643A
JP2006306643A JP2005128836A JP2005128836A JP2006306643A JP 2006306643 A JP2006306643 A JP 2006306643A JP 2005128836 A JP2005128836 A JP 2005128836A JP 2005128836 A JP2005128836 A JP 2005128836A JP 2006306643 A JP2006306643 A JP 2006306643A
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mold
cleaning
optical glass
sealed space
molding surface
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Yuzo Watanabe
雄三 渡辺
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AGC Inc
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Asahi Glass Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for cleaning a mold for an optical glass element which are suitable for cleaning a relatively small mold, wherein foreign matters removed can be surely collected or discharged to the outside without resticking the foreign matters on the circumference by forming a surely closed space without possibility of generating flaws on the molding surface of a mold, and further, the cleaning can be performed rapidly with simple structure without necessitating a large-size device. <P>SOLUTION: A closed space S is formed by covering the molding surface 12 of the mold (lower mold 7), and the molding surface 12 is cleaned by blowing a cleaning gas into the closed space S and at the same time, the cleaning gas in the closed space S is discharged without allowing the cleaning gas to diffuse to the circumference. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、プレス成形装置の金型の清掃方法及び装置に関する。より詳しくは、光学ガラス素子をプレスしてレンズやプリズム等を成形する際に用いる金型の清掃方法及び装置に関するものである。   The present invention relates to a mold cleaning method and apparatus for a press molding apparatus. More particularly, the present invention relates to a mold cleaning method and apparatus used when a lens, a prism, or the like is formed by pressing an optical glass element.

レンズ等の光学ガラス素子は、金型を用いてプレス成形される。
図６は光学ガラス素子をプレス成形するための金型の断面図である。
金型１０は、下型７、上型８、胴型９で構成される。この金型１０を用いて光学ガラス素子をプレス成形する場合、まず円筒状の胴型９内にセットされた下型７の成形面１２上に予め所定の球状に形成されたレンズ素材（不図示）を載置する。この状態でレンズ素材が塑性変形できる程度まで加熱する。この後、上型８を胴型９内に挿入し、レンズ素材を下型７と上型８の成形面１２で挟んでプレスする。これにより、レンズ素材は成形面１２に沿った所定の形状に成形され、レンズやプリズム等の光学ガラス素子が得られる。成形後、上型８（又は下型７）を外して光学ガラス素子を取出し、下型７及び上型８の成形面１２を清掃する。 Optical glass elements such as lenses are press-molded using a mold.
FIG. 6 is a sectional view of a mold for press-molding an optical glass element.
The mold 10 includes a lower mold 7, an upper mold 8, and a body mold 9. When the optical glass element is press-molded using the mold 10, first, a lens material (not shown) formed in advance in a predetermined spherical shape on the molding surface 12 of the lower mold 7 set in the cylindrical body mold 9 is used. ) Is placed. In this state, the lens material is heated to such an extent that it can be plastically deformed. Thereafter, the upper mold 8 is inserted into the body mold 9, and the lens material is sandwiched between the lower mold 7 and the molding surface 12 of the upper mold 8 and pressed. Thereby, the lens material is molded into a predetermined shape along the molding surface 12, and an optical glass element such as a lens or a prism is obtained. After molding, the upper mold 8 (or lower mold 7) is removed, the optical glass element is taken out, and the molding surface 12 of the lower mold 7 and the upper mold 8 is cleaned.

光学ガラス素子をプレス成形する場合、成形サイクルごとにプレス成形用金型に付着するバリ等の微小なガラス片を完全に除去しないと、次の成形サイクルで前記ガラス片が不純物として光学ガラス素子に混入し不良品となる。したがって、前記ガラス片を成形サイクルごとに完全に除去する必要がある。   When press molding an optical glass element, if the glass pieces such as burrs adhering to the press molding die are not completely removed in each molding cycle, the glass pieces will become impurities in the optical glass element in the next molding cycle. It becomes a defective product when mixed. Therefore, it is necessary to completely remove the glass piece every molding cycle.

金型清掃方法として綿棒やブラシ等の掃除体を用いる方法があるが、これによると、成形面に損傷を与えるおそれがある。また、エッチング処理により成形面への損傷を抑えつつ清掃を行う方法があるが、これによると清掃時間が長くなり、成形サイクル時間が長くなって生産性が著しく低下する。また、成形面に対し圧縮空気を吹付けて異物を吹飛ばす方法がある。しかしこの方法では、吹飛ばされた異物が作業スペース内を舞い上がり、次の成形で用いる光学ガラス素子の素材に付着するおそれがある。   Although there exists a method of using cleaning bodies, such as a cotton swab and a brush, as a mold cleaning method, there exists a possibility of damaging a molding surface according to this. Further, there is a method of performing cleaning while suppressing damage to the molding surface by etching treatment. However, according to this method, the cleaning time becomes longer, the molding cycle time becomes longer, and the productivity is remarkably lowered. Further, there is a method in which compressed air is blown against the molding surface to blow off foreign matters. However, in this method, the blown-out foreign matter may rise in the work space and adhere to the material of the optical glass element used in the next molding.

特に、レンズ等をプレス成形する場合はその精度が高く、成形装置自体が小さいため、微小のガラス片等の異物が品質に与える影響は大きい。したがって、確実に金型の成形面から異物を除去する必要がある。また、除去した異物が次の成形で用いる光学ガラス素子の素材に付着しないようにするため、異物を周囲に拡散させずに確実に収集又は外部に排出する必要がある。   In particular, when a lens or the like is press-molded, the accuracy is high and the molding apparatus itself is small, so that foreign matter such as a minute glass piece has a great influence on the quality. Therefore, it is necessary to reliably remove foreign matters from the molding surface of the mold. Further, in order to prevent the removed foreign matter from adhering to the material of the optical glass element used in the next molding, it is necessary to reliably collect or discharge the foreign matter without diffusing it around.

金型のクリーニング装置が特許文献１に記載されている。このクリーニング装置は、クリーニングテープを金型の球面部に当接させて清掃するものである。しかし、特許文献１のクリーニング装置は、金型の成形面である球面部に直接クリーニングテープを当接させるので、成形面に損傷を与える可能性がある。また、新しいテープ繰り出しのための装置が必要であり、費用、スペース確保等の問題点がある。   A mold cleaning device is described in Patent Document 1. In this cleaning device, cleaning is performed by bringing a cleaning tape into contact with a spherical surface of a mold. However, since the cleaning device of Patent Document 1 directly contacts the cleaning tape with the spherical surface, which is the molding surface of the mold, there is a possibility of damaging the molding surface. In addition, a new tape feeding device is required, and there are problems such as cost and space securing.

光学素子成形用金型をフッ酸、硝酸に浸漬後、純水でリンスし、次に綿布に酸化セリウム、純水を含浸させたもので研磨し、さらに純水中で超音波洗浄し、最後に熱処理する方法が特許文献２に記載されている。しかし、特許文献２の清掃方法は、洗浄時間が非常に長く、成形サイクルの間に実施すると生産性が低くなる問題があり、オンラインでの実施には不向きである。   The optical element molding die is immersed in hydrofluoric acid and nitric acid, rinsed with pure water, then polished with a cotton cloth impregnated with cerium oxide and pure water, and further ultrasonically cleaned in pure water. Japanese Patent Application Laid-Open No. H10-228707 describes a method for heat treatment. However, the cleaning method of Patent Document 2 has a problem that the cleaning time is very long and the productivity is lowered when it is performed during a molding cycle, and is not suitable for on-line implementation.

金型の成形面表面に紫外線を照射してカーボンを除去する方法が特許文献３に記載されている。しかし、特許文献３の清掃方法は、紫外線の照射装置やこれを旋回／伸長させる手段が必要であり装置が複雑で高価になる。また、カーボン以外の微少なガラス片等を紫外線照射で短時間のうちに除去することは困難である。   Patent Document 3 discloses a method of removing carbon by irradiating the molding surface of a mold with ultraviolet rays. However, the cleaning method of Patent Document 3 requires an ultraviolet irradiation device and means for rotating / extending the device, which makes the device complicated and expensive. Moreover, it is difficult to remove fine glass pieces other than carbon within a short time by ultraviolet irradiation.

金型に付着したバリをエアブロー装置により清掃する金型清掃装置が特許文献４に記載されている。この金型清掃装置は、金型に圧縮空気を噴出してバリを吹き飛ばすものである。しかし、特許文献４の金型清掃装置は、上型と下型でプレス成形する金型成形装置の上型の清掃に使用するものである。下型を清掃する場合には金型の清掃面を下向きとする機構が必要となり、装置が複雑となる。また、バリ受けカバーを、バリの飛散を想定してある程度大きめに形成する必要があり、装置が大型化し、スペース確保の問題がある。   Patent Document 4 describes a mold cleaning device that cleans burrs adhering to a mold with an air blowing device. This mold cleaning apparatus blows out burrs by jetting compressed air to a mold. However, the mold cleaning apparatus of Patent Document 4 is used for cleaning the upper mold of a mold forming apparatus that performs press molding with an upper mold and a lower mold. In order to clean the lower mold, a mechanism is required in which the cleaning surface of the mold faces downward, which complicates the apparatus. In addition, the burr receiving cover needs to be formed to be somewhat large in consideration of the scattering of the burr, and the apparatus becomes large and there is a problem of securing space.

金型のキャビティ面（成形面）を洗浄する金型洗浄装置及び金型洗浄方法が特許文献５に記載されている。この装置及び方法は、金型のキャビティ面を密閉状とする空間に洗浄液を噴射させ、この後エアを噴出させて洗浄液を汚れとともに排出するものである。しかし、特許文献５の金型洗浄装置及び金型洗浄方法は、洗浄液を用いて清掃するため、洗浄時間が長くかかるほか、洗浄液の漏れ対策が必要となる。また、洗浄液を排出する際、エアの噴出が不十分で洗浄液がキャビティ面に残留した場合、成形品に悪影響を及ぼすおそれがあるため、乾燥させる時間も長時間を要し、手間がかかり面倒である。また、上下の金型の表面でフレームを挟持して密閉空間を形成するため、金型の表面に凹凸がある場合に金型とフレーム間に隙間が生じ、洗浄液や汚れがここから漏れるおそれがある。また、密閉空間を形成するために上型と下型が必要であるため、上型のみ又は下型のみを清掃したい場合に適用することができない。   Patent Document 5 describes a mold cleaning apparatus and a mold cleaning method for cleaning a cavity surface (molding surface) of a mold. In this apparatus and method, the cleaning liquid is jetted into a space in which the cavity surface of the mold is hermetically sealed, and then the air is ejected to discharge the cleaning liquid together with dirt. However, since the mold cleaning apparatus and the mold cleaning method of Patent Document 5 are cleaned using a cleaning liquid, it takes a long cleaning time and measures against leakage of the cleaning liquid are required. Also, when the cleaning liquid is discharged, if the air jet is insufficient and the cleaning liquid remains on the cavity surface, the molded product may be adversely affected. is there. In addition, since the frame is sandwiched between the upper and lower mold surfaces to form a sealed space, if the mold surface is uneven, a gap is created between the mold and the frame, and cleaning liquid and dirt may leak from here. is there. In addition, since an upper mold and a lower mold are necessary to form a sealed space, it cannot be applied when only the upper mold or only the lower mold is to be cleaned.

特開昭６３−４２７８２号公報JP-A-63-42382 特開平６−４０７２９号公報JP-A-6-40729 特開平１１−３５３３１号公報JP-A-11-35331 特開平１２−１４１３８３号公報JP-A-12-141383 特開平１１−１５６８６５号公報Japanese Patent Laid-Open No. 11-156865

本発明は、金型の成形面に傷を発生させるおそれがなく、確実な密閉空間を形成して除去した異物を周囲に再付着させることなく確実に収集又は外部に排出することができ、大掛かりな装置を必要とせず簡単な構造で迅速に清掃でき、比較的小型の金型清掃に適した光学ガラス素子の金型清掃方法及び金型清掃装置の提供を目的とする。   The present invention has no risk of causing scratches on the molding surface of the mold, and can reliably collect or discharge the foreign matter removed by forming a reliable sealed space without reattaching the surroundings. It is an object of the present invention to provide a mold cleaning method and a mold cleaning apparatus for an optical glass element which can be quickly cleaned with a simple structure without requiring a simple apparatus and are suitable for relatively small mold cleaning.

前記目的を達成するため、請求項１記載の発明では、金型の成形面を覆って密閉空間を形成し、該密閉空間に清掃ガスを吹込んで前記成形面を清掃するとともに、該密閉空間内の清掃ガスを周囲に拡散させることなく排出することを特徴とする光学ガラス素子の金型清掃方法を提供する。   In order to achieve the above object, according to the first aspect of the present invention, a sealed space is formed by covering the molding surface of the mold, and a cleaning gas is blown into the sealed space to clean the molded surface, and the inside of the sealed space. A method for cleaning a mold of an optical glass element is provided, wherein the cleaning gas is discharged without being diffused around.

請求項２の発明では、金型の成形面を覆って密閉空間を形成する遮蔽部材を備え、前記密閉空間に清掃ガスを吹込む導入路及び該密閉空間から清掃ガスを排出する排出路を有することを特徴とする請求項１に記載の光学ガラス素子の金型清掃方法を実施するための金型清掃装置を提供する。   In a second aspect of the present invention, a shielding member that covers the molding surface of the mold to form a sealed space is provided, and an introduction path for blowing cleaning gas into the sealed space and a discharge path for discharging the cleaning gas from the sealed space are provided. A mold cleaning apparatus for carrying out the mold cleaning method for an optical glass element according to claim 1 is provided.

請求項３の発明では、請求項２の発明において、前記導入路及び排出路は、前記遮蔽部材に設けられたことを特徴としている。   According to a third aspect of the present invention, in the second aspect of the present invention, the introduction path and the discharge path are provided in the shielding member.

請求項４の発明では、請求項２の発明において、前記導入路及び／又は排出路は、前記金型に設けられた通気口を介して前記密閉空間と連通することを特徴としている。   According to a fourth aspect of the present invention, in the second aspect of the present invention, the introduction path and / or the discharge path communicate with the sealed space through a vent provided in the mold.

請求項１記載の発明によれば、清掃すべき金型の成形面を覆って密閉空間を形成し、この密閉空間に清掃ガスを吹込むというガスを使用した非接触な方法によりガラス屑や埃を清掃するため、プレス成形用金型の成形面（キャビティ面）を掃除体が触れることなくプレス成形用金型の清掃を行える。したがって、プレス成形用金型の成形面を傷つけることなく清掃が可能となる。また、密閉空間内に吹込まれた清掃ガスは周囲に拡散することなく密閉空間から排出されるため、ガスを吹付けた際のガラス屑や埃の飛散を防止することができ、周囲の雰囲気を汚すことなく清掃が可能となって、周囲に置かれた次のプレス成形用のガラス素材等への再付着が防止される。   According to the first aspect of the present invention, glass dust and dust are formed by a non-contact method using a gas that covers a molding surface of a mold to be cleaned to form a sealed space and blows a cleaning gas into the sealed space. Therefore, the press molding die can be cleaned without the cleaning body touching the molding surface (cavity surface) of the press molding die. Therefore, cleaning can be performed without damaging the molding surface of the press molding die. In addition, since the cleaning gas blown into the sealed space is discharged from the sealed space without diffusing to the surroundings, it is possible to prevent scattering of glass dust and dust when the gas is blown, and the surrounding atmosphere is reduced. Cleaning is possible without soiling, and reattachment to the glass material for the next press molding placed around is prevented.

請求項2の発明によれば、金型の成形面を密閉する遮蔽部材を用いて密閉空間を形成し、成形面に綿棒等の掃除体を直接当接させずにガス導入路から清掃ガスを吹出して成形面に付着したバリ等の異物を除去するため、成形面の損傷を防止できる。除去した異物は清掃ガスとともに排出路を通して密閉空間から外部に排出され確実に収集され、又は成形に影響のない場所に放出される。これにより、異物の飛散を防止できる。また、清掃ガスにより成形面を清掃するため、洗浄液を用いて清掃するよりも乾燥時間を省略できる等、短時間で効率よく清掃できる。また、そのための設備も不要となるため、装置が小型化し、小型の金型を使用する光学ガラス素子の金型清掃に適している。   According to the invention of claim 2, a sealed space is formed using a shielding member that seals the molding surface of the mold, and the cleaning gas is supplied from the gas introduction path without directly contacting a cleaning body such as a cotton swab to the molding surface. Since foreign matters such as burrs that are blown out and adhere to the molding surface are removed, damage to the molding surface can be prevented. The removed foreign matter is discharged together with the cleaning gas from the sealed space to the outside through the discharge path, and is reliably collected, or released to a place where the molding is not affected. Thereby, scattering of a foreign material can be prevented. In addition, since the molding surface is cleaned with the cleaning gas, the drying time can be omitted as compared with cleaning with a cleaning liquid, and the cleaning can be efficiently performed in a short time. Moreover, since the equipment for that is also unnecessary, the apparatus is downsized and is suitable for cleaning the mold of an optical glass element using a small mold.

請求項３記載の発明によれば、密閉空間を形成するための遮蔽部材に清掃ガスの導入路及び排出路を設けるため、清掃ガスにより確実に金型の清掃を行うことができる。この場合、金型の構成については、上型及び下型のみからなるもの又は胴型を有するもの等種類を問わず清掃すべき成形面に遮蔽部材をセットできれば清掃が可能となる。   According to the third aspect of the present invention, since the cleaning gas introduction path and the discharge path are provided in the shielding member for forming the sealed space, the mold can be reliably cleaned with the cleaning gas. In this case, the mold configuration can be cleaned if the shielding member can be set on the molding surface to be cleaned regardless of the type, such as the one composed only of the upper mold and the lower mold or the one having the body mold.

請求項4の発明によれば、上型、下型及び胴型からなる金型を清掃する場合に胴型に設けられたプレス時の空気抜き用通気口を利用して清掃ガスを密閉空間に導入又は密閉空間から排出できるため、密閉空間を形成するための遮蔽部材の構造を簡単にできる。   According to the invention of claim 4, when cleaning a mold composed of an upper mold, a lower mold, and a trunk mold, a cleaning gas is introduced into the sealed space by using a vent hole for air release provided in the trunk mold. Or since it can discharge | emit from sealed space, the structure of the shielding member for forming sealed space can be simplified.

図１は本発明に係る光学ガラス素子の金型清掃装置で金型を清掃する際の状態を示す断面図である。
光学ガラス素子のプレス成形後、上型とプレス成形された光学ガラス素子を胴型９内から取出し、胴型９内に下型７を残す。この状態で本発明に係る光学ガラス素子の金型清掃装置を構成する遮蔽部材１が、胴型９に被せられる。これにより、下型７の成形面（キャビティ面）１２は胴型９の内壁及び遮蔽部材１で覆われ、密閉空間Ｓが形成される。なお、図では省略するが、胴型９は作業台に載置される。なお、成形機上に載置したままでもよい。遮蔽部材１は、蓋部材２と円筒状のリング部材３で構成される。蓋部材２には、清掃ガスの排出路５が備わり、リング部材３には清掃ガスの導入路４が備わる。清掃ガスは導入路４から密閉空間に流入し、下型７の成形面１２のガラス屑や埃等の異物を舞い上げ、異物とともに排出路５から排出される（図中矢印参照）。導入路４は、ホース等を介して不図示のブロア又はコンプレッサに接続されている。排出路５は、不図示のホース等を介してプレス成形や清掃場所その他成形素材や成形品の周囲から離れた場所に連通している。 FIG. 1 is a cross-sectional view showing a state when a mold is cleaned by a mold cleaning device for an optical glass element according to the present invention.
After press molding of the optical glass element, the upper mold and the press-molded optical glass element are taken out from the body mold 9 and the lower mold 7 is left in the body mold 9. In this state, the shielding member 1 constituting the optical glass element mold cleaning apparatus according to the present invention is placed on the body mold 9. Thereby, the molding surface (cavity surface) 12 of the lower mold 7 is covered with the inner wall of the body mold 9 and the shielding member 1, and the sealed space S is formed. Although not shown in the figure, the body mold 9 is placed on a work table. It may be left on the molding machine. The shielding member 1 includes a lid member 2 and a cylindrical ring member 3. The lid member 2 is provided with a cleaning gas discharge path 5, and the ring member 3 is provided with a cleaning gas introduction path 4. The cleaning gas flows into the sealed space from the introduction path 4, soars foreign matter such as glass dust and dust on the molding surface 12 of the lower mold 7, and is discharged from the discharge path 5 together with the foreign matter (see the arrow in the figure). The introduction path 4 is connected to a blower or a compressor (not shown) via a hose or the like. The discharge path 5 communicates with a place away from the periphery of the molding material and the molded product, such as a press molding and cleaning place, via a hose (not shown).

密閉空間Ｓに吹込む清掃ガスは空気でもよく、窒素ガス等の非酸化性ガスであるとさらに好ましい。還元性ガスであると特に好ましい。   The cleaning gas blown into the sealed space S may be air, and more preferably a non-oxidizing gas such as nitrogen gas. A reducing gas is particularly preferred.

密閉空間Ｓへのガスの流入手段としては、送風機により圧送する方法又はコンプレッサにより圧縮ガスを吹付ける方法でもよい。また、ガスの排出路５からの排出は、ガスを効率的に密閉空間Ｓの外へ排出できる手段であればどのような方法（吸引ブロア又は自然排出）を用いてもよい。   As a means for inflow of gas into the sealed space S, a method of pumping with a blower or a method of blowing compressed gas with a compressor may be used. Any method (suction blower or natural discharge) may be used for discharging the gas from the discharge path 5 as long as the gas can be efficiently discharged out of the sealed space S.

なお、本発明に係る光学ガラス素子の金型清掃装置で清掃される金型は下型に限らず、上型を清掃することもできる。この場合、上型を逆向きにすれば下型と同様に清掃できる。また、ガスの導入路４や排出路５は、リング部材３だけでなく、蓋部材２に設けてもよいし、蓋部材２又はリング部材３のいずれかに少なくとも１つ以上あればよい。蓋部材２とリング部材３は一体でもよいし、別部材でもよい。   The mold cleaned by the optical glass element mold cleaning apparatus according to the present invention is not limited to the lower mold, and the upper mold can also be cleaned. In this case, if the upper mold is reversed, it can be cleaned in the same manner as the lower mold. Further, the gas introduction path 4 and the discharge path 5 may be provided not only in the ring member 3 but also in the lid member 2, or at least one of the lid member 2 and the ring member 3 may be provided. The lid member 2 and the ring member 3 may be integrated or separate members.

本発明に係る光学ガラス素子の金型清掃装置で金型を清掃する場合、光学ガラス素子をプレス成形するための金型成形装置に備わる円筒状の胴型９から上型と成形後の光学ガラス素子を取出す。この後、胴型９に遮蔽部材１を被せて遮蔽部材１のリング部材３と蓋部材２で下型７の成形面１２を覆って成形面１２上に密閉空間Ｓを形成する。この状態でリング部材３に備わる導入路４から窒素ガス等の清掃ガスを例えば吹出圧力１８０ｋＰａで流入させ、成形面１２に残留するガラス屑や埃等の異物を排出路５から清掃ガスとともに例えば排出圧力９０ｋＰａで排出する。   When the mold is cleaned by the optical glass element mold cleaning apparatus according to the present invention, the upper mold and the optical glass after molding are formed from the cylindrical body mold 9 provided in the mold forming apparatus for press-molding the optical glass element. Take out the element. Thereafter, the body 9 is covered with the shielding member 1, and the ring member 3 and the lid member 2 of the shielding member 1 cover the molding surface 12 of the lower mold 7 to form a sealed space S on the molding surface 12. In this state, a cleaning gas such as nitrogen gas is introduced from the introduction path 4 provided in the ring member 3 at a blowing pressure of 180 kPa, for example, and foreign matters such as glass dust and dust remaining on the molding surface 12 are discharged from the discharge path 5 together with the cleaning gas, for example. Discharge at a pressure of 90 kPa.

このように、本発明に係る光学ガラス素子の金型清掃装置を用いた成形面の清掃は、清掃ガスを用いて成形面に対して非接触清掃方式であるため、成形面に掃除体が触れることがない。したがって、成形面１２を傷つけることがない。また、異物は排出路５から確実に排出されるため、周囲への異物の飛散を防止できる。また、清掃ガスを吹付けると同時に異物を排出路５から排出するため、短時間で効率よく清掃できる。   Thus, since cleaning of the molding surface using the optical glass element mold cleaning apparatus according to the present invention is a non-contact cleaning method with respect to the molding surface using the cleaning gas, the cleaning body touches the molding surface. There is nothing. Therefore, the molding surface 12 is not damaged. In addition, since foreign matters are reliably discharged from the discharge path 5, scattering of foreign matters to the surroundings can be prevented. Further, since the foreign gas is discharged from the discharge path 5 at the same time as the cleaning gas is blown, the cleaning can be efficiently performed in a short time.

金型清掃装置を構成する遮蔽部材１の実際の寸法としては、例えば、蓋部材２の直径Ａが２４ｍｍで、排出路５の内径Ｂが１５ｍｍ、リング部材３の長さＣが１０ｍｍである。金型の直径Ｄは１８ｍｍであり、高さＥは１５ｍｍである。このように、本発明に係る光学ガラス素子の金型清掃装置は、小型で精度の高い光学ガラス素子のプレス成形用の金型に適用できる大きさであり、このような金型の清掃に適している。   As actual dimensions of the shielding member 1 constituting the mold cleaning device, for example, the diameter A of the lid member 2 is 24 mm, the inner diameter B of the discharge path 5 is 15 mm, and the length C of the ring member 3 is 10 mm. The mold has a diameter D of 18 mm and a height E of 15 mm. As described above, the mold cleaning device for optical glass elements according to the present invention is small and can be applied to a mold for press molding optical glass elements with high accuracy, and is suitable for cleaning such molds. ing.

図２は本発明に係る別の光学ガラス素子の金型清掃装置で金型を清掃する際の状態を示す断面図である。
図示したように、図２の例は、胴型９に通気口１３が形成され（図では２箇所）、この通気口１３に導入路４を接続して清掃ガスを密閉空間Ｓに吹込むものである。通気口１３は、光学ガラス素子のプレス成形の際に胴型９内の空気抜きとして用いられる。その他の構成、作用、効果は図１の例と同様である。 FIG. 2 is a cross-sectional view showing a state in which the mold is cleaned by the mold cleaning device for another optical glass element according to the present invention.
As shown in the figure, in the example of FIG. 2, a vent hole 13 is formed in the body mold 9 (two places in the figure), and the introduction path 4 is connected to the vent hole 13 to blow the cleaning gas into the sealed space S. The vent hole 13 is used as an air vent in the body mold 9 when the optical glass element is press-molded. Other configurations, operations, and effects are the same as in the example of FIG.

図３は本発明に係るさらに別の光学ガラス素子の金型清掃装置で金型を清掃する際の状態を示す断面図である。
図示したように、図３の例は、胴型９に形成された２箇所の通気口１３をそれぞれ一方に導入路４を接続し、他方に排出路５を接続したものである。このように、胴型９に導入路４と排出路５を接続したため、遮蔽部材１は胴型９の開口を塞ぐ蓋部材２のみで足りる。その他の構成、作用、効果は図１の例と同様である。 FIG. 3 is a cross-sectional view showing a state when the mold is cleaned by the mold cleaning device for still another optical glass element according to the present invention.
As shown in the figure, the example of FIG. 3 is such that two inlets 13 formed in the body mold 9 are connected to the introduction path 4 on one side and the discharge path 5 is connected to the other side. As described above, since the introduction path 4 and the discharge path 5 are connected to the trunk mold 9, the shielding member 1 need only be the lid member 2 that closes the opening of the trunk mold 9. Other configurations, operations, and effects are the same as in the example of FIG.

図４は本発明に係るさらに別の光学ガラス素子の金型清掃装置で金型を清掃する際の状態を示す断面図である。
図示したように、図４の例は、リング部材３を図１に比して長くして、胴型を用いずに密閉空間を形成するものである。光学ガラス素子のプレス成形において、胴型を用いずに上型と下型のみで行う場合がある。このような場合、上型又は下型をリング部材３に挿入することにより、成形面１２を密閉することができる。その他の構成、作用、効果は図１の例と同様である。 FIG. 4 is a cross-sectional view showing a state when the mold is cleaned by the mold cleaning device for still another optical glass element according to the present invention.
4, the ring member 3 is made longer than that in FIG. 1 to form a sealed space without using a body mold. In press molding of an optical glass element, there are cases where only an upper mold and a lower mold are used without using a body mold. In such a case, the molding surface 12 can be sealed by inserting the upper die or the lower die into the ring member 3. Other configurations, operations, and effects are the same as in the example of FIG.

図５は本発明に係る別の光学ガラス素子の金型清掃装置で金型を清掃する際の状態を示す断面図である。
図示したように、図５の例は、上型８と下型７を同時に清掃するものである。遮蔽部材１をリング部材３のみで構成し、このリング部材３の両端から上型８及び下型７を挿入することにより、成形面１２を密閉する。清掃ガスはリング部材３に備わる導入路４（図では２箇所）から密閉空間Ｓ内に流入し、異物とともに排出路５から排出される。このような構成とすれば、上型８と下型７の両方を同時に清掃できるので、清掃工程が簡略化され、効率よく迅速に清掃できる。その他の構成、作用、効果は図１の例と同様である。 FIG. 5 is a cross-sectional view showing a state in which a mold is cleaned by a mold cleaning device for another optical glass element according to the present invention.
As shown in the figure, the example of FIG. 5 cleans the upper mold 8 and the lower mold 7 simultaneously. The shielding member 1 is composed only of the ring member 3, and the molding die 12 is sealed by inserting the upper die 8 and the lower die 7 from both ends of the ring member 3. The cleaning gas flows into the sealed space S from the introduction path 4 (two places in the figure) provided in the ring member 3 and is discharged from the discharge path 5 together with the foreign matter. With such a configuration, since both the upper mold 8 and the lower mold 7 can be cleaned at the same time, the cleaning process is simplified and the cleaning can be efficiently and quickly performed. Other configurations, operations, and effects are the same as in the example of FIG.

本発明は、樹脂や金属等を成形する金型の清掃にも適用できる。   The present invention can also be applied to cleaning of a mold for molding a resin or metal.

本発明に係る光学ガラス素子の金型清掃装置で金型を清掃する際の状態を示す断面図。Sectional drawing which shows the state at the time of cleaning a metal mold | die with the metal mold | die cleaning apparatus of the optical glass element which concerns on this invention. 本発明に係る別の光学ガラス素子の金型清掃装置で金型を清掃する際の状態を示す断面図。Sectional drawing which shows the state at the time of cleaning a metal mold | die with the metal mold | die cleaning apparatus of another optical glass element which concerns on this invention. 本発明に係るさらに別の光学ガラス素子の金型清掃装置で金型を清掃する際の状態を示す断面図。Sectional drawing which shows the state at the time of cleaning a metal mold | die with the metal mold | die cleaning apparatus of another optical glass element which concerns on this invention. 本発明に係るさらに別の光学ガラス素子の金型清掃装置で金型を清掃する際の状態を示す断面図。Sectional drawing which shows the state at the time of cleaning a metal mold | die with the metal mold | die cleaning apparatus of another optical glass element which concerns on this invention. 本発明に係るさらに別の光学ガラス素子の金型清掃装置で金型を清掃する際の状態を示す断面図。Sectional drawing which shows the state at the time of cleaning a metal mold | die with the metal mold | die cleaning apparatus of another optical glass element which concerns on this invention. 光学ガラス素子をプレス成形するための金型の断面図。Sectional drawing of the metal mold | die for press-molding an optical glass element.

符号の説明Explanation of symbols

１：遮蔽部材、２：蓋部材、３：リング部材、４：導入路、５：排出路、７：下型、８：上型、９：胴型、１０：金型、１２：成形面、１３：通気口、Ｓ：密閉空間。
1: shielding member, 2: lid member, 3: ring member, 4: introduction path, 5: discharge path, 7: lower mold, 8: upper mold, 9: barrel mold, 10: mold, 12: molding surface, 13: Vent, S: sealed space.

Claims (4)

金型の成形面を覆って密閉空間を形成し、
該密閉空間に清掃ガスを吹込んで前記成形面を清掃するとともに、
該密閉空間内の清掃ガスを周囲に拡散させることなく排出することを特徴とする光学ガラス素子の金型清掃方法。 Cover the molding surface of the mold to form a sealed space,
While cleaning the molding surface by blowing a cleaning gas into the sealed space,
A method for cleaning a mold of an optical glass element, wherein the cleaning gas in the sealed space is discharged without diffusing around. 金型の成形面を覆って密閉空間を形成する遮蔽部材を備え、
前記密閉空間に清掃ガスを吹込む導入路及び該密閉空間から清掃ガスを排出する排出路を有することを特徴とする請求項１に記載の光学ガラス素子の金型清掃方法を実施するための金型清掃装置。 Provided with a shielding member that covers the molding surface of the mold and forms a sealed space,
The mold for carrying out the mold cleaning method for an optical glass element according to claim 1, further comprising an introduction path for blowing cleaning gas into the sealed space and a discharge path for discharging the cleaning gas from the sealed space. Mold cleaning device. 前記導入路及び排出路は、前記遮蔽部材に設けられた請求項２記載の金型清掃装置。   The mold cleaning apparatus according to claim 2, wherein the introduction path and the discharge path are provided in the shielding member. 前記導入路及び／又は排出路は、前記金型に設けられた通気口を介して前記密閉空間と連通する請求項２記載の金型清掃装置。
The mold cleaning apparatus according to claim 2, wherein the introduction path and / or the discharge path communicates with the sealed space via a vent provided in the mold.
JP2005128836A 2005-04-27 2005-04-27 Method and device for cleaning mold for optical glass element Pending JP2006306643A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008297157A (en) * 2007-05-31 2008-12-11 Olympus Corp Method for manufacturing optical element and apparatus used therein
CN109530336A (en) * 2018-12-28 2019-03-29 宁波神洲机模铸造有限公司 It can avoid the collection type mold drifting dust equipment of spluttering

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008297157A (en) * 2007-05-31 2008-12-11 Olympus Corp Method for manufacturing optical element and apparatus used therein
CN109530336A (en) * 2018-12-28 2019-03-29 宁波神洲机模铸造有限公司 It can avoid the collection type mold drifting dust equipment of spluttering

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