JPS62297224A - Forming of glass lens - Google Patents
Forming of glass lensInfo
- Publication number
- JPS62297224A JPS62297224A JP14197586A JP14197586A JPS62297224A JP S62297224 A JPS62297224 A JP S62297224A JP 14197586 A JP14197586 A JP 14197586A JP 14197586 A JP14197586 A JP 14197586A JP S62297224 A JPS62297224 A JP S62297224A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- glass
- lens
- molding
- glass 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.)
- Granted
Links
- 239000011521 glass Substances 0.000 title claims abstract description 30
- 238000000465 moulding Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 abstract description 22
- 239000002184 metal Substances 0.000 abstract description 8
- 238000002844 melting Methods 0.000 abstract description 7
- 230000004075 alteration Effects 0.000 abstract description 4
- 230000008020 evaporation Effects 0.000 abstract description 3
- 238000001704 evaporation Methods 0.000 abstract description 3
- 238000011109 contamination Methods 0.000 abstract 2
- 239000002994 raw material Substances 0.000 abstract 2
- 238000000748 compression moulding Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000203 mixture Substances 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
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/005—Pressing under special atmospheres, e.g. inert, reactive, vacuum, clean
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/66—Means for providing special atmospheres, e.g. reduced pressure, inert gas, reducing gas, clean room
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Glass Compositions (AREA)
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
産業上の利用分野
本発明ば、光学機械に使用されるガラスレンズの成形方
法に関するものである。Detailed Description of the Invention 3. Detailed Description of the Invention Field of Industrial Application The present invention relates to a method of molding a glass lens used in an optical machine.
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。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 then press-form it.
（例えば、特開昭５８−８４１３４号公報）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。(For example, Japanese Unexamined Patent Publication No. 58-84134) The above-mentioned conventional molding method will be explained below with reference to the drawings.
第４図は成形直前の状態図である。１は上型、２は下型
、１０は胴型、２０は空気抜き、４０はガラス素材であ
る。FIG. 4 is a state diagram immediately before molding. 1 is an upper mold, 2 is a lower mold, 10 is a body mold, 20 is an air vent, and 40 is a glass material.
まず、ガラス素材４０を適当な方法でガラスの軟化点近
傍まで加熱し、上下型１，２を用い押圧成形する事によ
りガラスレンズを形成する。First, a glass lens is formed by heating the glass material 40 by an appropriate method to near the softening point of glass and press-molding it using the upper and lower molds 1 and 2.
発明が解決しようとする問題点
上記の様な成形方法では金型１．２と胴型１０により素
材４０が閉じ込められた形となり、鉛やアンチモン等の
低融点金属を含有する素材を成形すると、前記低融点金
属が選択的に蒸発し、第３図に示す様に金型面に付着物
３が発生する。この付着物３はしだいに堆積し、金型表
面の面粗度を悪くすると共に、その面粗度が成形された
レンズ面にも転写されるためレンズ表面が凹凸になり、
その部分で光の乱反射が起り成形レンズの透過率を低下
させる原因になっていた。Problems to be Solved by the Invention In the above-described molding method, the material 40 is confined between the mold 1.2 and the body mold 10, and when molding a material containing a low melting point metal such as lead or antimony, The low melting point metal is selectively evaporated and deposits 3 are generated on the mold surface as shown in FIG. This deposit 3 gradually accumulates and worsens the surface roughness of the mold surface, and the surface roughness is also transferred to the molded lens surface, making the lens surface uneven.
Diffuse reflection of light occurs in this area, causing a decrease in the transmittance of the molded lens.
問題点を解決するための手段
前記付着物３はガラス素材から選択的に蒸発した低融点
金属が金型内に閉じ込められるために発生しており、胴
型１０を用いなければ周囲に飛散するため金型面に前記
付着物は発生しない。従って、金型内に発生した蒸発物
をなんらかの方法で金型外へ排出すれば金型面の付着物
は防止できると考えられる。本発明は胴壁１０に設けた
空気抜き２０を利用しガラス素材４０から発生した蒸発
物を金型外へ強制的に排出しつつ成形するという手段を
用いたものである。Means for Solving the Problem The deposit 3 is generated because low melting point metal selectively evaporated from the glass material is trapped in the mold, and if the body mold 10 is not used, it will be scattered around. The above-mentioned deposits do not occur on the mold surface. Therefore, it is considered that deposits on the mold surface can be prevented by discharging the evaporated matter generated within the mold to the outside of the mold by some method. The present invention uses an air vent 20 provided in the body wall 10 to forcibly discharge vapors generated from the glass material 40 to the outside of the mold during molding.
作用
本発明は、上記した手段により素材４０から発生した蒸
発物を金型外へ排出し、金型面への付着防止を可能とし
た。Function The present invention makes it possible to discharge the evaporated matter generated from the material 40 out of the mold by the above-described means, thereby preventing it from adhering to the mold surface.
実施例
以下本発明の一実施例のガラスレンズの成形方法につい
て図面を参照しながら説明する。EXAMPLE Hereinafter, a method for molding a glass lens according to an example of the present invention will be described with reference to the drawings.
第１図は本発明による成形直前の断面図である。FIG. 1 is a sectional view immediately before molding according to the present invention.
第２図は本発明による成形直後の断面図である。FIG. 2 is a sectional view immediately after molding according to the present invention.
１．２は上下金型、３．４は空気を逃すための切り欠き
部、１０は胴壁、２０は空気抜き、３０は空気抜き２０
に挿入されたノズル、４０はガラス素材である。1.2 is an upper and lower mold, 3.4 is a notch for air release, 10 is a body wall, 20 is an air vent, 30 is an air vent 20
The nozzle 40 inserted into is made of glass material.
さて、第１図において、ノズル３０をポンプ（図示せず
）で吸引すると金型外の雰囲気ガスが空気抜き２０を通
じ（ａ）から流入し、金型内部のガスは（ｂ）から排出
され雰囲気ガスが循環される。この時の吸引量は、金型
の内容積及び金型を加熱するヒータパワーとの関係で適
当な流量に設定する必要がある。即ち、吸引量が不十分
であるとガラス素材から選択的に蒸発した低融点金属が
金型内に残り、金型面に僅かながら前記低融点金属の付
着物が発生する。吸引量が多過ぎると金型内の雰囲気ガ
スの循環によってガラス素材の熱が多量に奪われるため
、素材温度が成形温度に達するまでに時間を要すること
になる。本実施例では吸引量を１リットル／分とし、連
続的に吸引しつつ金型を周囲から加熱することにより、
ガラス素材４０を徐々に加熱する。ガラス素材４０がそ
の組成中に含有する低融点金属の蒸発温度に達すると素
材表面より蒸発を始めるが、ノズル３０から吸引されて
いるため内部ガスと共に金型外へ排出される。そしてガ
ラス素材４０がさらに加熱され軟化点近傍の温度に達す
ると上下方向から金型を押圧し、第２図に示す様なガラ
スレンズ４０を形成する。この間もノズル３０から金型
内の雰囲気ガスは常時排出されている。Now, in FIG. 1, when the nozzle 30 is sucked by a pump (not shown), the atmospheric gas outside the mold flows through the air vent 20 from (a), and the gas inside the mold is exhausted from (b), and the atmospheric gas is circulated. The amount of suction at this time needs to be set to an appropriate flow rate in relation to the internal volume of the mold and the heater power for heating the mold. That is, if the amount of suction is insufficient, the low melting point metal selectively evaporated from the glass material remains in the mold, and a small amount of the low melting point metal adheres to the mold surface. If the amount of suction is too large, a large amount of heat will be removed from the glass material due to the circulation of atmospheric gas within the mold, and it will take time for the material temperature to reach the molding temperature. In this example, the suction amount was set to 1 liter/min, and by heating the mold from the surroundings while continuously suctioning,
The glass material 40 is gradually heated. When the glass material 40 reaches the evaporation temperature of the low melting point metal contained in its composition, evaporation begins from the surface of the material, but since it is sucked through the nozzle 30, it is discharged out of the mold together with the internal gas. When the glass material 40 is further heated and reaches a temperature close to its softening point, a mold is pressed from above and below to form a glass lens 40 as shown in FIG. During this time, the atmospheric gas within the mold is constantly exhausted from the nozzle 30.
その結果、金型表面に全く付着物が発生せず、成形レン
ズ４０には金型の面形状が正確に転写され、波面収差０
．０２〜０．０３λ、透過率９５％以上という高精度な
成形を可能とした。尚、本実施例ではノズル３０から吸
引する事例を述べたが逆に吹き出す方法でも同様の効果
が得られる事は言うまでもない。As a result, no deposits are generated on the mold surface, the surface shape of the mold is accurately transferred to the molded lens 40, and wavefront aberration is zero.
．． 02 to 0.03λ and a transmittance of 95% or more, making it possible to perform highly accurate molding. In this embodiment, a case has been described in which suction is performed from the nozzle 30, but it goes without saying that the same effect can be obtained by blowing out the ink.
発明の効果
以上のように、本発明を用いる事により金型表面の付着
物を防止すると共に、金型の面形状が正確にガラス素材
に転写され、透過率・波面収差共に良好なガラスレンズ
を成形することが可能となる。Effects of the Invention As described above, by using the present invention, deposits on the mold surface can be prevented, the surface shape of the mold can be accurately transferred to the glass material, and a glass lens with good transmittance and wavefront aberration can be produced. It becomes possible to mold.
第１図は本発明による成形直前の状態図、第２図はその
成形直後の状態図、第３図は金型表面の付着状況を示す
説明図、第４図は従来の成形法の成形直前の状態図であ
る。
１・・・・・・上型、２・・・・・・下型、３．４・・
・・・・切り吹き部、１０・・・・・・胴壁、２０・・
・・・・空気抜き、３０・・・・・・ノズル、４０・・
・・・・ガラス素材。
代理人の氏名 弁理士 中尾敏男 ばかＩ名／−ｍ−上
型
？−−−丁型
ｌθ−−一胴型
ｚＯ−ｍ−エアーペン）
第 ｌ 図 Ｊ
θ−−−ノズＩし４θ−−−η゛ラス素
ヰ
！−・上型
２−−一丁型。
ｌθ−・−Ｆｆ４型
？θ・−エアーベア）
Ｊθ・−ノズーｌし
第 ２ 図
４Ｏ−−−ｓ・ラス轄第３図
、デ
！−・上型
？−下・１
／θ−−−月８１
第４図 ？θ゛°工Ｔ−１ンｔ４θ−−
−γラズ素材Fig. 1 is a state diagram immediately before molding according to the present invention, Fig. 2 is a state diagram immediately after molding, Fig. 3 is an explanatory diagram showing the state of adhesion on the mold surface, and Fig. 4 is a diagram immediately before molding according to the conventional molding method. FIG. 1...Top mold, 2...Bottom mold, 3.4...
...Blowout section, 10...Body wall, 20...
...Air vent, 30...Nozzle, 40...
...Glass material. Agent's name Patent attorney Toshio Nakao Idiot I name/-m-upper type? ---Double type lθ--One-barrel type zO-m-Air pen) Figure l J
θ−−−Noz I and 4θ−−−η゛Las element ヰ! -・Upper mold 2--One piece type. lθ-・-Ff4 type? θ・-air bear) Jθ・-nozzle Fig. 2
4O---s・Las Figure 3, De! -・Upper mold? -Bottom・1 /θ---Moon 81 Figure 4? θ゛°engine T-1 t4θ--
-γRaz material
Claims (1)
を、強制的に循環しつつ押圧成形することを特徴とする
ガラスレンズの成形方法。A method for molding a glass lens, characterized by press molding while forcibly circulating an atmosphere inside a mold constituted by a pair of molds and a body mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14197586A JPS62297224A (en) | 1986-06-18 | 1986-06-18 | Forming of glass lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14197586A JPS62297224A (en) | 1986-06-18 | 1986-06-18 | Forming of glass lens |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30239387A Division JPS63159229A (en) | 1987-11-30 | 1987-11-30 | Forming metallic mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62297224A true JPS62297224A (en) | 1987-12-24 |
| JPH0361613B2 JPH0361613B2 (en) | 1991-09-20 |
Family
ID=15304473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14197586A Granted JPS62297224A (en) | 1986-06-18 | 1986-06-18 | Forming of glass lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62297224A (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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59195541A (en) * | 1983-04-16 | 1984-11-06 | Hitachi Ltd | Manufacture of glass lens and its apparatus |
| JPS60118643A (en) * | 1983-11-25 | 1985-06-26 | Fuji Photo Optical Co Ltd | Method for forming high precision glass lens |
-
1986
- 1986-06-18 JP JP14197586A patent/JPS62297224A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59195541A (en) * | 1983-04-16 | 1984-11-06 | Hitachi Ltd | Manufacture of glass lens and its apparatus |
| JPS60118643A (en) * | 1983-11-25 | 1985-06-26 | Fuji Photo Optical Co Ltd | Method for forming high precision glass lens |
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 |
|---|---|
| JPH0361613B2 (en) | 1991-09-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5716762B2 (en) | Vials and manufacturing method thereof | |
| CN100475507C (en) | Injection-moulded thermoplastic plastic spectacle lens suitable for full-automatic impregnation to make hard coating | |
| GB1493196A (en) | Methods of producing glass articles with ophthalmically finished surfaces | |
| JP2015206880A (en) | Optical element, and manufacturing method of optical element | |
| JPS62297224A (en) | Forming of glass lens | |
| JPH0483724A (en) | Glass blank for production of optical unit and production thereof | |
| JP3743749B2 (en) | Method for producing glass molded body, method for producing press-molding preform, method for producing press-molded product, and method for producing optical element | |
| CN104080745B (en) | The manufacture method of the manufacture method of glass preform and glass preform, optical element and optical element | |
| JPS6033221A (en) | Manufacture of precision glass article | |
| JPS6172633A (en) | Apparatus for cleaning molding surface of mold | |
| JP2621956B2 (en) | Optical element molding method | |
| JPS6138130B2 (en) | ||
| JPS63307129A (en) | Production of optical element | |
| JPS5818330B2 (en) | Manufacturing method for meniscus lenses for eyeglasses | |
| JPH07118025A (en) | Formation of optical glass element | |
| JPS62162629A (en) | Forming of glass lens | |
| JPH05286728A (en) | Production of glass lens | |
| JPH0339464Y2 (en) | ||
| JP2636010B2 (en) | Glass material for molding and method for producing the same | |
| JP2006008470A (en) | Glass material for mold pressing, manufacturing method therefor and method for manufacturing optical element | |
| JPH04362028A (en) | Lens stock, production thereof and production of molded lens | |
| JPH04357123A (en) | Molding optical element | |
| JPH10182171A (en) | Formation of optical glass element | |
| JPS63222023A (en) | Production of optical element | |
| JP2020158338A (en) | Metal mold device and method of manufacturing glass article |