JPS63159229A - Forming metallic mold - Google Patents
Forming metallic moldInfo
- Publication number
- JPS63159229A JPS63159229A JP30239387A JP30239387A JPS63159229A JP S63159229 A JPS63159229 A JP S63159229A JP 30239387 A JP30239387 A JP 30239387A JP 30239387 A JP30239387 A JP 30239387A JP S63159229 A JPS63159229 A JP S63159229A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molding
- metallic mold
- metallic
- gas
- 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.)
- Granted
Links
- 238000000465 moulding Methods 0.000 claims description 30
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 239000012778 molding material Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 235000014443 Pyrus communis Nutrition 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/06—Construction of plunger or mould
- C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/65—Means for releasing gas trapped between glass and press die
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Eyeglasses (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、光学機器に使用されるレンズの成形金型に関
するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a mold for forming lenses used in optical equipment.
従来の技術
近年光学レンズを研磨工程なしの一発成形により形成す
る試みが多くなされている。その成形法の一つとして素
材を軟化点近傍の温度に加熱し、押圧成形する方法があ
る（たとえば特開昭５８−８４１３４号公報）。2. Description of the Related Art In recent years, many attempts have been made to form optical lenses by one-shot molding without a polishing process. One of the molding methods is to heat the material to a temperature near its softening point and press mold it (for example, Japanese Patent Laid-Open No. 84134/1983).
以下図面を参照しながら、上述した従来の成形方法を説
明する。The conventional molding method mentioned above will be explained below with reference to the drawings.
第５図は成形直前の断面図である。１００は上型、２０
０は下型、１）０は胴型、＋３０は成形素材である。FIG. 5 is a sectional view immediately before molding. 100 is the upper mold, 20
0 is the lower mold, 1) 0 is the body mold, and +30 is the molding material.
まず、還元性雰囲気の成形室内において適当な方法で成
形素材１３０を金型とともに素材の軟化点近傍まで加熱
し、上下型１００，２００を用い押圧成形することによ
りレンズを成形する。First, in a molding chamber with a reducing atmosphere, the molding material 130 is heated together with a mold to near the softening point of the material, and the lens is molded by pressure molding using the upper and lower molds 100 and 200.
発明が解決しようとする問題点
上記のような成形金型の構造では上下金型１００゜２０
０と胴型１）０により成形素材１３０が閉じ込められた
形となり、成形時に金型内のガスが完全に排出されず金
型面とレンズ面との間にガスが残り、高精度な成形がで
きない。また金型内のガスが成形室内の還元性雰囲気と
直換されないため金型の内面が酸化されるといった問題
を有していた。Problems to be Solved by the Invention In the structure of the molding die as described above, the upper and lower molds are 100°20
0 and body mold 1) 0, the molding material 130 becomes trapped, and the gas in the mold is not completely exhausted during molding, leaving gas between the mold surface and the lens surface, resulting in high precision molding. Can not. Furthermore, there was a problem in that the inner surface of the mold was oxidized because the gas in the mold was not directly exchanged with the reducing atmosphere in the molding chamber.
問題点を解決するための手段
本発明は胴型の肉厚方向に貫通するガス抜き穴を設けた
構成により解決するものである。Means for Solving the Problems The present invention solves the problems by providing a vent hole penetrating through the barrel mold in the thickness direction.
作用
本発明は、上記した手段により金型内のガスを成形室内
の還元性雰囲気と容易に置換することができると同時に
、成形完了時には金型内のガスを完全に排出することが
でき高精度なレンズ成形を可能とするものである。Function The present invention allows the gas in the mold to be easily replaced with the reducing atmosphere in the molding chamber by the above-described means, and at the same time, the gas in the mold can be completely exhausted when molding is completed, resulting in high precision. This enables lens molding.
実施例
以下本発明によるレンズの成形方法の一実施例について
図面を参照しながら説明する。EXAMPLE Hereinafter, an example of the lens molding method according to the present invention will be described with reference to the drawings.
第１図ｆａｌ、 （ｂｌは本発明による成形用型の構造
を示し、１０は潤製、２０は潤製１０の肉厚方向に貫通
するように設けたガス抜き穴で、本実施例では４箇所に
設けた。その穴の位置は第４図に示すように成形完了時
において切り欠き部３．４の範囲内にあり、金型の転写
面の外周部よりレンズ４０側にはみださないことが重要
である。第２図（ａ）、 （ｂ）は本発明による金型の
構造を示し、２は金型、４は金型の転写面の外周部に設
けた切り欠き部である。第３図は前記潤製および金型を
用いた成形直前の断面図である。第４図は成形直後の断
面図である。１．２は上下金型、１０は円型、３０は成
形素材、５０．６０は上下プレスヘッドである０本成形
は還元性雰囲気内で行い、成形素材にはＳＦ系ガラス素
材を用いた。以下、順次成形の過程を述べる。Fig. 1 fal, (bl shows the structure of the molding mold according to the present invention, 10 is a lubrication mold, 20 is a gas vent hole provided so as to penetrate in the thickness direction of the lubrication mold 10, and in this embodiment, 4 As shown in Fig. 4, the position of the hole is within the range of the notch 3.4 when molding is completed, and does not protrude from the outer periphery of the transfer surface of the mold toward the lens 40 side. 2(a) and 2(b) show the structure of the mold according to the present invention, 2 is the mold, and 4 is a notch provided on the outer periphery of the transfer surface of the mold. Fig. 3 is a sectional view immediately before molding using the above-mentioned mold and mold. Fig. 4 is a sectional view immediately after molding. 1.2 is an upper and lower mold, 10 is a circular mold, and 30 is a sectional view immediately after molding. The molding material, 50.60, is the upper and lower press head.The molding was performed in a reducing atmosphere, and an SF glass material was used as the molding material.The molding process will be described below.
第３図のように、ヒーターを内蔵した上下プレスヘッド
５０．６０間に金型をセントし、成形素材３０を成形可
能な軟化点付近まで加熱する。その後、プレスヘッド５
０．６０により上下金型１゜２を加圧し成形素材３０を
徐々に変形させることによって第４図に示すようなレン
ズ４０が形成される。その成形素材３０の変形過程にお
いて、金型内のガスは切り欠き部３，４そしてガス抜き
穴２０を通じ金型の昇温時に対流により成形室内の還元
性雰囲気と置換されるとともに、成形完了時には金型内
のガスは完全に排出される。したがって、成形レンズ４
０には金型の面形状が正確に転写され、波面収差０．０
２〜０．０３ λという高精度な成形が可能となるとと
もに金型の酸化も十分実用可能なレベルまで押えること
ができた。As shown in FIG. 3, a mold is placed between upper and lower press heads 50 and 60 each having a built-in heater, and the molding material 30 is heated to around the softening point at which it can be molded. Then press head 5
A lens 40 as shown in FIG. 4 is formed by pressurizing the upper and lower molds 1.degree. 2 with a pressure of 0.60 mm and gradually deforming the molding material 30. During the deformation process of the molding material 30, the gas in the mold passes through the notches 3, 4 and the gas vent hole 20 and is replaced by the reducing atmosphere in the molding chamber by convection as the temperature of the mold rises, and upon completion of molding. The gas in the mold is completely exhausted. Therefore, the molded lens 4
0, the surface shape of the mold is accurately transferred, and the wavefront aberration is 0.0.
High-precision molding of 2 to 0.03 λ became possible, and oxidation of the mold could be suppressed to a sufficiently practical level.
発明の効果
以上のように、本発明は潤製にガス抜き穴を設けるとい
う構成により金型内のガスの流れを容易にし、金型の面
形状を正確にレンズ面に転写できるという効果を有する
ものである。Effects of the Invention As described above, the present invention has the effect of facilitating the flow of gas in the mold by providing well-defined gas vent holes, and allowing the surface shape of the mold to be accurately transferred to the lens surface. It is something.
第１図ｆａｔ、 （ｂｌは本発明による潤製の構造図、
第２図（ａ）、φ）は本発明による金型の構造図、第３
図は本発明による成形直前の断面図、第４図はその成形
直後の断面図、第５図は従来の成形法による成形直前の
断面図である。
１・・・・・・上型、２・・・・・・下型、３．４・・
・・・・切り欠き部、１０・・・・・・潤製、２０・・
・・・・ガス抜き穴、３０・・・・・・成形素材、４０
・・・・・・レンズ、５０．６０・・・・・・上下プレ
スヘッド。
代理人の氏名 弁理士 中尾敏男 ほか１名第１図
第２図
／−よ型
２− 下型
３．４−一一口り欠き潟
ｌθ−一用梨
、！；０．６θ−−−よ下アレスヘーノ）″ｌ−上型
？−下型
５０．６θ−一上下アνスヘヅド”
第５図FIG.
Fig. 2(a), φ) is a structural diagram of the mold according to the present invention;
The figure is a cross-sectional view immediately before molding according to the present invention, FIG. 4 is a cross-sectional view immediately after molding, and FIG. 5 is a cross-sectional view immediately before molding according to the conventional molding method. 1...Top mold, 2...Bottom mold, 3.4...
...Notch, 10...Junsei, 20...
...Gas vent hole, 30...Molding material, 40
...Lens, 50.60 ...Upper and lower press head. Name of agent: Patent attorney Toshio Nakao and 1 other person Figure 1 Figure 2 /-Yo-type 2-Lower type 3.4-Ichichichichikichigata lθ-Ichiyo pear,! 0.6θ--Lower Arescheno)"l-Upper mold?-Lower mold 50.6θ-One upper and lower axed" Figure 5
Claims (2)
において、胴型の肉厚方向に貫通するガス抜き穴を設け
たことを特徴とする成形金型。(1) A molding die comprising a pair of molds and a body mold, characterized in that a gas vent hole is provided that penetrates the body mold in the thickness direction.
き部を設けたことを特徴とする特許請求の範囲第（１）
項記載の成形金型。(2) Claim (1) characterized in that a notch is provided on the outer periphery of the transfer surface of at least one of the molds.
Molding mold described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30239387A JPS63159229A (en) | 1987-11-30 | 1987-11-30 | Forming metallic mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30239387A JPS63159229A (en) | 1987-11-30 | 1987-11-30 | Forming metallic mold |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14197586A Division JPS62297224A (en) | 1986-06-18 | 1986-06-18 | Forming of glass lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63159229A true JPS63159229A (en) | 1988-07-02 |
| JPH0360780B2 JPH0360780B2 (en) | 1991-09-17 |
Family
ID=17908371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30239387A Granted JPS63159229A (en) | 1987-11-30 | 1987-11-30 | Forming metallic mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63159229A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01226744A (en) * | 1988-03-04 | 1989-09-11 | Konica Corp | Formation mold for glass optical element |
-
1987
- 1987-11-30 JP JP30239387A patent/JPS63159229A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01226744A (en) * | 1988-03-04 | 1989-09-11 | Konica Corp | Formation mold for glass optical element |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0360780B2 (en) | 1991-09-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |