JPH0524864A - Mold for forming optical element - Google Patents
Mold for forming optical elementInfo
- Publication number
- JPH0524864A JPH0524864A JP20760991A JP20760991A JPH0524864A JP H0524864 A JPH0524864 A JP H0524864A JP 20760991 A JP20760991 A JP 20760991A JP 20760991 A JP20760991 A JP 20760991A JP H0524864 A JPH0524864 A JP H0524864A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- optical element
- sialon
- ceramics
- molding
- 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.)
- Withdrawn
Links
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
- C03B11/084—Construction of plunger or mould for making solid articles, e.g. lenses material composition or material properties of press dies therefor
-
- 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
- C03B2215/02—Press-mould materials
- C03B2215/05—Press-mould die materials
- C03B2215/07—Ceramic or cermets
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Products (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は光学素子成形用型に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for molding an optical element.
【０００２】[0002]
【従来の技術】従来の光学素子成形用型としては、特開
昭６３−１８５８３４号公報に記載された型がある。こ
の成形用型はモリブデン，タングステンまたはタンタル
から基材を構成し、この基材の成形面をホウ化処理して
ホウ化物層を形成した構造となっている。この成形用型
は基材をホウ化処理することにより、劣化を抑制して長
寿命とすることを目的としている。2. Description of the Related Art As a conventional optical element molding die, there is a die described in JP-A-63-185834. This molding die has a structure in which a base material is made of molybdenum, tungsten or tantalum, and a boride layer is formed by boring the molding surface of the base material. This molding die is intended to suppress deterioration and extend the life by boring the base material.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら上述した
従来の光学素子成形用型は、モリブデン，タングステ
ン，タンタルが高温状態で酸素と結合し易い性質を有し
ていると共に、酸化物になると粉末状態となるため成形
面の粗さが悪化する問題があった。また、タングステン
が主成分となっている合金では、そのホウ化処理の際
に、ホウ素とタングステンとが反応しにくく、安定した
ホウ化物層とするのが難しい。このため長時間の高温使
用で、タングステンが酸素と結合して、鏡面となってい
る成形面が劣化する不具合があった。However, the above-mentioned conventional optical element molding die has a property that molybdenum, tungsten, and tantalum easily bond with oxygen at a high temperature, and when it becomes an oxide, it becomes a powder state. Therefore, there is a problem that the roughness of the molding surface deteriorates. Further, in an alloy containing tungsten as a main component, it is difficult for boron and tungsten to react with each other during the boration treatment, and it is difficult to form a stable boride layer. For this reason, there is a problem in that tungsten is combined with oxygen and the molding surface, which is a mirror surface, deteriorates when used at high temperature for a long time.
【０００４】本発明は、かかる問題点に鑑みてなされた
もので、高温における耐酸化性に優れると共に、粘度の
変化もなく、しかもガラス素材との融着のない光学素子
成形用型を提供することを目的とする。The present invention has been made in view of the above problems, and provides an optical element molding die which is excellent in oxidation resistance at high temperature, has no change in viscosity, and is not fused with a glass material. The purpose is to
【０００５】[0005]
【課題を解決するための手段および作用】本発明の光学
素子成形用型は、ＢＮ１０〜５０ｗｔ％、サイアロン９
０〜５０ｗｔ％のセラミックスにより成形されているこ
とを特徴とする。Means and Actions for Solving the Problems The optical element molding die of the present invention comprises: BN 10 to 50 wt%, Sialon 9
It is characterized by being molded from ceramics of 0 to 50 wt%.
【０００６】上記構成におけるサンアロンはＳｉ3 Ｎ4
−ＡｌＮ−Ａｌ2 Ｏ3 −ＳｉＯ2 系の構造材料セラミッ
クスであるため、このサイアロンを有する型基材は熱衝
撃性に優れており、高温下での成形時の破損がない。ま
た、型基材にＢＮが添加されており、ガラス素材との濡
れ性が悪い特性を有しているため、ガラス素材の融着を
防止することができる。なお、上記組成において、ＢＮ
が５０ｗｔ％以上であると、曲げ強度が大きく低下し、
成形型としての強度が小さくなり、一方、ＢＮが１０ｗ
ｔ％以下の場合には、ガラス素材との濡れ性が大きくな
るため、ガラス素材が融着する。このためＢＮとして
は、上記範囲が好適である。In the above structure, San Alon is made of Si 3 N 4
Since it is a --AlN--Al 2 O 3 --SiO 2 -based structural material ceramic, the mold base material having this sialon has excellent thermal shock resistance and does not break during molding at high temperatures. Moreover, since BN is added to the mold base material and the wettability with the glass material is poor, fusion of the glass material can be prevented. In the above composition, BN
Is 50 wt% or more, the bending strength is significantly reduced,
The strength as a mold becomes small, while BN is 10w
When it is t% or less, the wettability with the glass material becomes large, and the glass material is fused. Therefore, the above range is suitable as the BN.
【０００７】[0007]
【実施例１】いずれも粒径０．５μｍ程度のサイアロン
８０ｗｔ％，ＢＮ２０ｗｔ％を混合し、１．５ｔｏｎの
予備プレス後、８時間で仮焼成し、研削して図１に示す
寸法形状に仕上げた。図１において、成形面１は外形が
φ１８ｍｍで、曲率半径が４０ｍｍとなっている。この
後、１８００℃で９６時間、本焼成することにより、機
械的特性および物理的特性を有した複合セラミックスの
型基材とした。そして、この型基材を研削加工して、そ
の成形面を外形φ１８ｍｍ，曲率半径３９ｍｍとした。
この型基材の成形面をダイヤモンドパウダー＃３０００
を研磨剤として研磨し、表面粗度Ｒｍａｘ＝０．０５〜
０．０８μｍに仕上げた。なお、この表面粗度Ｒｍａｘ
としては上述した数値より小さくしても良い。[Embodiment 1] In each case, 80 wt% of sialon having a particle diameter of about 0.5 μm and 20 wt% of BN were mixed, pre-pressed for 1.5 ton, pre-baked for 8 hours, ground, and finished to the shape shown in FIG. It was In FIG. 1, the molding surface 1 has an outer diameter of 18 mm and a radius of curvature of 40 mm. After that, main firing was performed at 1800 ° C. for 96 hours to obtain a composite ceramic mold base material having mechanical and physical properties. Then, this mold base material was ground to form a molding surface having an outer diameter of 18 mm and a radius of curvature of 39 mm.
The molding surface of this mold base is diamond powder # 3000.
As an abrasive, and the surface roughness Rmax = 0.05-
Finished to 0.08 μm. The surface roughness Rmax
May be smaller than the above-mentioned numerical value.
【０００８】この光学素子成形用型を用いて、ＳＦ系ガ
ラス素材を８００℃で軟化させ、型温４８０℃で成形し
たところ、１０，０００ショット以上の連続成形を行っ
ても、成形品の品質は良好で型基材の劣化及び焼付きは
見られなかった。Using this optical element molding die, an SF type glass material was softened at 800 ° C. and molded at a mold temperature of 480 ° C. When the continuous molding of 10,000 shots or more was performed, the quality of the molded product was obtained. Was good and no deterioration or seizure of the mold substrate was observed.
【０００９】[0009]
【実施例２】サイアロン６０ｗｔ％，ＢＮ４０ｗｔ％の
粉末を混合し、１．５ｔｏｎの予備プレス後、１０００
℃、８時間で仮焼成し、研削して図１と同様な形状に加
工した。その後１８００℃，９６時間で本焼成し、機械
的特性および物理的特性を有した複合セラミックスの型
基材とした。この型基材を研削加工し、その成形面をダ
イヤモンドパウダー研磨剤を用いて、Ｒｍａｘ≒０．０
８μｍ以下まで仕上げた。この光学素子成形用型を用
い、ＬａＫ系のガラス素材を９００℃で軟化させ、型温
６００℃で、８０００ショットの連続成形を行ったとこ
ろ、いずれの成形品も光学特性を満足した品質となって
おり、また、型基材の劣化は見られなかった。これによ
り更にその以上の成形が可能であることが確認できた。[Embodiment 2] Powders of 60 wt% sialon and 40 wt% BN were mixed, pre-pressed with 1.5 ton and then 1000
It was calcined at 8 ° C. for 8 hours, ground, and processed into a shape similar to that shown in FIG. After that, main firing was performed at 1800 ° C. for 96 hours to obtain a composite ceramic mold base material having mechanical and physical properties. This mold base material was ground, and its molding surface was polished with a diamond powder abrasive to give Rmax≈0.0.
Finished to 8 μm or less. Using this optical element molding die, a LaK glass material was softened at 900 ° C., and continuous molding was performed for 8000 shots at a mold temperature of 600 ° C., and all molded products had a quality that satisfied the optical characteristics. In addition, the mold base material was not deteriorated. From this, it was confirmed that further molding was possible.
【００１０】[0010]
【発明の効果】以上説明したように本発明の光学素子成
形用型では、ＢＮおよびサイアロンのセラミックスによ
り成形されるため、高温における耐酸化性、熱衝撃性に
優れると共に、カラス素材の融着がなく、しかも離型性
が良好で長寿命とすることができる。As described above, in the optical element molding die of the present invention, since it is molded from BN and sialon ceramics, it is excellent in oxidation resistance and thermal shock resistance at a high temperature, and the glass material is fused. In addition, the mold releasability is good and the life can be extended.
【図１】本発明の実施例１により成形された型基材の断
面図である。FIG. 1 is a cross-sectional view of a mold base formed according to Example 1 of the present invention.
１ 成形面 1 molding surface
Claims (1)
〜５０ｗｔ％のセラミックスにより成形されていること
を特徴とする光学素子成形用型。Claims: 1. BN 10 to 50 wt%, Sialon 90
A mold for molding an optical element, characterized in that the mold is made of ˜50 wt% ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20760991A JPH0524864A (en) | 1991-07-24 | 1991-07-24 | Mold for forming optical element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20760991A JPH0524864A (en) | 1991-07-24 | 1991-07-24 | Mold for forming optical element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0524864A true JPH0524864A (en) | 1993-02-02 |
Family
ID=16542619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20760991A Withdrawn JPH0524864A (en) | 1991-07-24 | 1991-07-24 | Mold for forming optical element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0524864A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1528048A1 (en) * | 2003-10-29 | 2005-05-04 | Sumitomo Electric Industries, Ltd. | Ceramic composite material and method of its manufacture |
| CN102941603A (en) * | 2012-11-18 | 2013-02-27 | 安庆市江城冶金机械有限公司 | Automatic stapling machine for mounting nuts on board |
-
1991
- 1991-07-24 JP JP20760991A patent/JPH0524864A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1528048A1 (en) * | 2003-10-29 | 2005-05-04 | Sumitomo Electric Industries, Ltd. | Ceramic composite material and method of its manufacture |
| US7348286B2 (en) | 2003-10-29 | 2008-03-25 | Sumitomo Electric Industries, Ltd. | Ceramic composite material and method of its manufacture |
| CN102941603A (en) * | 2012-11-18 | 2013-02-27 | 安庆市江城冶金机械有限公司 | Automatic stapling machine for mounting nuts on board |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19981008 |