JPS6362373B2 - - Google Patents
Info
- Publication number
- JPS6362373B2 JPS6362373B2 JP54040603A JP4060379A JPS6362373B2 JP S6362373 B2 JPS6362373 B2 JP S6362373B2 JP 54040603 A JP54040603 A JP 54040603A JP 4060379 A JP4060379 A JP 4060379A JP S6362373 B2 JPS6362373 B2 JP S6362373B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molding
- ultraviolet rays
- lens
- plastic lens
- 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
Links
- 238000000034 method Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 8
- 239000004033 plastic Substances 0.000 claims description 8
- 239000011521 glass Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 230000001678 irradiating effect Effects 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims 1
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 239000011159 matrix material Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
- B29D11/00432—Auxiliary operations, e.g. machines for filling the moulds
- B29D11/00442—Curing the lens material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2011/00—Optical elements, e.g. lenses, prisms
- B29L2011/0016—Lenses
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Ophthalmology & Optometry (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は、種々の表面構造を有する母型中に、
紫外線の作用下で硬化する液状樹脂を充填して、
できるだけ低温で、紫外線を照射しながら硬化さ
せて、光学的精度のプラスチツクレンズを得る方
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides the following features:
Filled with liquid resin that hardens under the action of ultraviolet light,
This invention relates to a method of obtaining optically accurate plastic lenses by curing them at as low a temperature as possible while irradiating them with ultraviolet rays.
従来、プラスチツクレンズを製造する代表的な
方法としては、射出成型、圧縮成型などがある
が、いずれも熱可塑性樹脂を樹脂の可塑化温度以
上の温度に高めて熱溶融させ、高圧力下に金型に
充填して成型する方法がある。このとき使用する
成型用金型は、成型後、常圧に戻したときの樹脂
の体積収縮を見越して設計されたものでなければ
ならない。そして、この方法で光学的精密級レン
ズを作ることは大変困難で、歩留りの悪いもので
あつた。また、上述の方法で成型されたレンズ
は、金型接触面とレンズ内部でその冷却速度が著
しく異なるため、肉厚の大きなレンズになればな
る程、機械的な歪が残留しやすく、これがレンズ
内での光学的な歪を発生させ、また最悪の場合に
は、長期間の使用中に内部ストレスによりレンズ
にクラツクが入る原因ともなつていた。 Traditionally, typical methods for manufacturing plastic lenses include injection molding and compression molding, but in both cases thermoplastic resin is heated to a temperature higher than the plasticizing temperature of the resin, melted, and molded under high pressure. There is a method of filling it into a mold and molding it. The molding die used at this time must be designed in anticipation of volumetric contraction of the resin when the pressure is returned to normal after molding. It was very difficult to produce optical precision lenses using this method, and the yield was low. In addition, in lenses molded using the above method, the cooling rate is significantly different between the contact surface of the mold and the inside of the lens, so the thicker the lens, the more likely it is that mechanical distortion will remain. In the worst case, internal stress can cause cracks in the lens during long-term use.
本発明は、上述の問題点をすべて解決すること
ができるもので、具体的には、紫外線の作用下で
硬化する液状プラスチツク原材料を、希望するレ
ンズ形状の成形用型中に注入し、加圧しながら紫
外線を照射して硬化させるという方法である。こ
の方法によれば、母型に忠実な成型物を得ること
ができる。特に、紫外線硬化型の樹脂材料を用い
た場合には、−10℃〜50℃程度の低い温度域でも
紫外線を照射しながら硬化させることが可能で、
母型の熱膨張による変形などもあまり考慮する必
要もなく、通常のレンズ作製技術で作つたガラス
製の母型などもそのまま使用することができる。 The present invention can solve all of the above-mentioned problems. Specifically, a liquid plastic raw material that hardens under the action of ultraviolet rays is injected into a mold of a desired lens shape, and then pressurized. This method involves curing the material by irradiating it with ultraviolet light. According to this method, a molded product that is faithful to the mother mold can be obtained. In particular, when using an ultraviolet curable resin material, it is possible to cure it while irradiating ultraviolet rays even in a low temperature range of -10℃ to 50℃.
There is no need to take into account deformation of the matrix due to thermal expansion, and glass matrices made using normal lens manufacturing techniques can be used as they are.
次に、本発明の方法における一実施例につい
て、図面を用いて説明する。図はレンズを成型す
るための装置の断面概略図であるが、この場合に
は凸レンズの製造装置が示されている。 Next, one embodiment of the method of the present invention will be described with reference to the drawings. The figure is a schematic cross-sectional view of an apparatus for molding lenses; in this case, a convex lens manufacturing apparatus is shown.
ガラス母型４は補給器２と連結され、液状樹脂
１が常に若干の加圧状態を保持しつつ成型型４中
に供給される構造になつている。そのため、たと
え紫外線の照射の進行により樹脂が硬化収縮して
も、収縮分が常に補填される。紫外線は照射源５
よりガラス母型４の両面から照射され、できるだ
けレンズ内での歪が少ないよう工夫されている。
成型完了後、補給器２のコツク３を閉じ、ガラス
型の閉じ面６より両側に開いて成型したレンズを
取り出す。 The glass mother mold 4 is connected to a supply device 2, and the structure is such that the liquid resin 1 is always supplied into the mold 4 while maintaining a slightly pressurized state. Therefore, even if the resin hardens and shrinks as the UV irradiation progresses, the shrinkage is always compensated for. Ultraviolet rays are irradiation source 5
The light is irradiated from both sides of the glass matrix 4 to minimize distortion within the lens as much as possible.
After the molding is completed, the pot 3 of the supply device 2 is closed, and the molded lens is taken out from the closed surface 6 of the glass mold by opening it on both sides.
この方法はレンズの製造に限られるものではな
く、凸レンズの場合には、さらにそのレンズ面に
アルミニウム、もしくはクロムなどを蒸着して、
精度のよい凸面鏡を作製することができるし、そ
の他にも母型のさまざまの設計により各種形状の
レンズ、鏡面を作ることができる。 This method is not limited to manufacturing lenses; in the case of convex lenses, aluminum or chromium is further vapor-deposited on the lens surface.
High-precision convex mirrors can be made, and lenses and mirror surfaces of various shapes can also be made by designing the matrix in various ways.
図面は本発明にかかるプラスチツクレンズの製
造方法の一実施例を説明するためのものである。
１……紫外線で硬化する液状樹脂、２……補給
器、３……補給器コツク、４……ガラス製成形用
母型、５……紫外線照射源、６……成形用母型閉
じ面。
The drawings are for explaining one embodiment of the method for manufacturing a plastic lens according to the present invention. DESCRIPTION OF SYMBOLS 1... Liquid resin that hardens with ultraviolet light, 2... Replenisher, 3... Replenisher pot, 4... Glass molding mold, 5... Ultraviolet irradiation source, 6... Molding matrix closing surface.
Claims (1)
原材料を、希望するレンズ形状の成形用型中に注
入しかつ加圧しながら紫外線を照射して硬化させ
ることを特徴とするプラスチツクレンズの製造方
法。 ２ 成形用型として、精密光学的に研磨されたガ
ラス型を使用することを特徴とする特許請求の範
囲第１項記載のプラスチツクレンズの製造方法。 ３ 硬化時の成形型温度が−10℃〜50℃であるこ
とを特徴とする特許請求の範囲第１項記載のプラ
スチツクレンズの製造方法。[Claims] 1. A plastic lens characterized in that a liquid plastic raw material that hardens under the action of ultraviolet rays is poured into a mold having a desired lens shape and cured by irradiating it with ultraviolet rays while applying pressure. Production method. 2. The method for manufacturing a plastic lens according to claim 1, characterized in that a precision optically polished glass mold is used as the molding mold. 3. The method for producing a plastic lens according to claim 1, wherein the mold temperature during curing is -10°C to 50°C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4060379A JPS55132221A (en) | 1979-04-03 | 1979-04-03 | Manufacture of plastic lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4060379A JPS55132221A (en) | 1979-04-03 | 1979-04-03 | Manufacture of plastic lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55132221A JPS55132221A (en) | 1980-10-14 |
| JPS6362373B2 true JPS6362373B2 (en) | 1988-12-02 |
Family
ID=12585083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4060379A Granted JPS55132221A (en) | 1979-04-03 | 1979-04-03 | Manufacture of plastic lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55132221A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2477058A1 (en) * | 1980-02-28 | 1981-09-04 | Medicornea Sa | METHOD OF MANUFACTURING BY MOLDING CONTACT LENSES, AND LENSES OBTAINED |
| JPS59141A (en) * | 1982-06-24 | 1984-01-05 | Mitsubishi Electric Corp | Transmission screen |
| JPS625819A (en) * | 1985-07-02 | 1987-01-12 | Showa Denko Kk | Reactive injection molding |
| EP0226123A3 (en) * | 1985-12-03 | 1988-08-10 | Matsushita Electric Industrial Co., Ltd. | Method for producing transparent plastic article |
| US4879318A (en) * | 1986-01-28 | 1989-11-07 | Ophthalmic Research Group International, Inc. | Plastic lens composition and method for the production thereof |
| JPH01163027A (en) * | 1987-12-21 | 1989-06-27 | Matsushita Electric Ind Co Ltd | Method and device for molding optical element |
| JPH01286808A (en) * | 1988-05-13 | 1989-11-17 | Matsushita Electric Ind Co Ltd | Molding method of plastic lens and its device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5357847A (en) * | 1976-11-05 | 1978-05-25 | Seiko Epson Corp | Lens |
| JPS53121642A (en) * | 1977-03-31 | 1978-10-24 | Ito Kougaku Kougiyou Kk | Production method of |
-
1979
- 1979-04-03 JP JP4060379A patent/JPS55132221A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5357847A (en) * | 1976-11-05 | 1978-05-25 | Seiko Epson Corp | Lens |
| JPS53121642A (en) * | 1977-03-31 | 1978-10-24 | Ito Kougaku Kougiyou Kk | Production method of |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55132221A (en) | 1980-10-14 |
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