JP2749431B2 - Glass optical element molding equipment - Google Patents
Glass optical element molding equipmentInfo
- Publication number
- JP2749431B2 JP2749431B2 JP2150885A JP15088590A JP2749431B2 JP 2749431 B2 JP2749431 B2 JP 2749431B2 JP 2150885 A JP2150885 A JP 2150885A JP 15088590 A JP15088590 A JP 15088590A JP 2749431 B2 JP2749431 B2 JP 2749431B2
- Authority
- JP
- Japan
- Prior art keywords
- molding
- mold
- heating furnace
- molding chamber
- chamber
- 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 - Fee Related
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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はガラス光学素子の成形装置に関し、詳細には
特に多種少量の生産に適した成形装置に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding apparatus for glass optical elements, and more particularly, to a molding apparatus suitable for production of various small quantities.
近年、光学ガラスレンズの成形技術はカメラ，ピック
アップ等に搭載される特に非球面レンズにおける有効な
加工方法として重要されつつある。しかしながら、従来
の成形装置においては一般に多量生産を前提にしたもの
であり、異種レンズの成形に移行する際、特に型の交換
に長時間要するものであった。従って、多種少量用とし
て成形装置を用いた場合、その稼働率が著しく低下して
しまう欠点があった。2. Description of the Related Art In recent years, molding techniques for optical glass lenses have become important as an effective processing method particularly for aspherical lenses mounted on cameras, pickups, and the like. However, in the conventional molding apparatus, mass production is generally premised, and it takes a long time to change the mold, especially when transitioning to molding of different types of lenses. Therefore, when a molding apparatus is used for various kinds and small quantities, there is a disadvantage that the operation rate is significantly reduced.
因って、上記欠点を解決すべく以下の様な発明が開示
されている。Therefore, the following inventions have been disclosed in order to solve the above drawbacks.
例えば、特開昭63−260830号公報記載の発明において
は、同時複数の型を着脱可能に取着したマウントを各々
上下型用としてプレス方向に接近離反可能に対向配置す
るとともに、上記各マウントを回転可能に保持し、所望
のレンズに応じて予め加熱された型をマウントの回転に
より割り出して異種レンズの成形に移行するものであ
る。For example, in the invention described in Japanese Patent Application Laid-Open No. 63-260830, mounts in which a plurality of dies are detachably attached at the same time are opposed to each other so as to approach and separate in the press direction for upper and lower dies, and The mold is held rotatably, and a preheated mold is indexed by rotating the mount according to a desired lens, and the process proceeds to molding of a different kind of lens.
上記装置によれば、型交換とそれに伴う型のヒートダ
ウンおよびヒートアップが不要であり、異種レンズの成
形に移行する際の段取りの時間を著しく短縮できる。According to the above-described apparatus, it is not necessary to exchange the mold and to perform heat-down and heat-up of the mold, and it is possible to remarkably reduce a setup time when the process shifts to molding of a different kind of lens.
しかるに、前記特開昭63−260830号公報記載の発明に
おいては、以下の様な問題がある。However, the invention described in JP-A-63-260830 has the following problems.
すなわち、この種の成形装置では上下型の偏心精度が
極めて重要であり、相互のシフト量で数ミクロン，チル
ト量で数分が要求されているが、前記成形装置では上下
マウントの回転により型を割り出す構造なのでマウント
の部品精度が極めて厳しくなるのは勿論、部品の組立精
度、マウントの回転精度も厳しくおさえる必要があり、
コスト的に効果なものになる。That is, in this type of molding apparatus, the eccentricity of the upper and lower dies is extremely important, and a mutual shift amount of several microns and a tilt amount of several minutes are required. Because of the indexing structure, not only the precision of the mount components becomes extremely strict, but also the assembly accuracy of the components and the rotation accuracy of the mount must be strictly controlled.
It is cost effective.
また、昨今のように営業と製造が益々直結し、営業か
らのオーダーに対して製造の迅速な対応が求められるよ
うになってくると、もはや生産編成は一日単位から半日
単位、時間単位へと短縮され、めまぐるしい生産編成変
更指示がだされるようになっている。前記成形装置では
一度に複数の型をマウントにセットし成形を開始するた
め、成形開始後の型交換は不可能であり、対応可能な生
産編成スパンは一日単位が限度である。In addition, as sales and production are more directly connected as in recent years, and prompt responses to production are required for sales orders, production organization is no longer from one day unit to half day unit and hour unit. It has been shortened, and a prompt production change instruction has been issued. In the molding apparatus, since a plurality of dies are set on the mount at one time and the molding is started, the dies cannot be exchanged after the start of the molding, and the production knitting span which can be supported is limited to a day unit.
因って、本発明は上記問題点に着目して開発されたも
ので、他品種少量から多品種極少量のガラスレンズを、
極短スパンの生産編成指示に対応しながら成形できると
ともに、高精度のレンズを低コストで成形できるガラス
光学素子の成形装置の提供を目的とするものである。Therefore, the present invention has been developed with a focus on the above problems, from a small amount of other types to a very small amount of various types of glass lenses,
It is an object of the present invention to provide a glass optical element forming apparatus capable of forming a high-precision lens at low cost while being able to form while responding to a production knitting instruction of an extremely short span.
本発明は、成形室内に設けられた着脱可能な一対の型
間に光学素子素材を介在させて押圧し、光学素子を成形
するガラス光学素子の成形装置において、前記成形室を
複数配設し、この配設された成形室の間に加熱炉を設け
るとともに、各成形室と加熱炉とを貫通する搬送部材を
設けたものである。The present invention provides a glass optical element molding apparatus for molding an optical element by interposing an optical element material between a pair of detachable molds provided in a molding chamber, and pressing the plurality of molding chambers. A heating furnace is provided between the provided molding chambers, and a conveying member that penetrates each molding chamber and the heating furnace is provided.
第１図は、本発明に係るガラス光学素子の成形装置の
概念図である。FIG. 1 is a conceptual diagram of a glass optical element forming apparatus according to the present invention.
１は成形装置で、この成形装置１には内部に設けられ
たマウントに着脱可能に取り付けた型を有する同一構成
の成形室２と成形室３とが配設されている。成形室２と
成形室３との間には加熱炉４が設けられ、成形室2,成形
室３および加熱炉４の内部を貫通するコンベア５が設け
られている。コンベア５上にはプリフォーム６を載置し
たキャリア７が一定間隔で載置されている。Reference numeral 1 denotes a molding apparatus, in which a molding chamber 2 and a molding chamber 3 having the same configuration and having a mold detachably mounted on a mount provided therein are provided. A heating furnace 4 is provided between the molding chamber 2 and the molding chamber 3, and a conveyor 5 penetrating the inside of the molding chamber 2, the molding chamber 3 and the heating furnace 4 is provided. Carriers 7 on which preforms 6 are placed are placed on the conveyor 5 at regular intervals.
以上の構成から成る成形装置１は、まず加熱炉４でプ
リフォーム６を載置したキャリア７を加熱する。加熱
後、キャリア７をコンベア５により成形室２に搬送し、
成形室２内でプリフォーム６はプレス成形される。プレ
ス終了後コンベア５が１ピッチ分進み（図中左方向）、
成形室２内のキャリア７は成形室２外に搬送され、次の
キャリア７が成形室２内に搬送される。The molding apparatus 1 having the above configuration first heats the carrier 7 on which the preform 6 is placed in the heating furnace 4. After heating, the carrier 7 is transported to the molding chamber 2 by the conveyor 5,
The preform 6 is press-molded in the molding chamber 2. After the press, the conveyor 5 advances by one pitch (left direction in the figure),
The carrier 7 in the molding chamber 2 is transported out of the molding chamber 2, and the next carrier 7 is transported in the molding chamber 2.
この間、前工程の成形を終了した成形室３では型の取
り外しと、次工程の成形に備えて型の取り付けが行われ
た後、所定温度まで型がヒートアップされる。成形室２
での成形工程が終了すると、成形室２内の型はヒートダ
ウンを開始し、非酸化温度まで型温が下がった時点で型
の取り外しを行う。In the meantime, after the mold is removed from the molding chamber 3 where the molding in the previous step has been completed, and the mold is attached in preparation for molding in the next step, the mold is heated up to a predetermined temperature. Molding room 2
When the molding process in step (1) is completed, the mold in the molding chamber 2 starts to heat down, and the mold is removed when the mold temperature falls to the non-oxidizing temperature.
この間、次工程の成形室３で成形されるプリフォーム
６を載置したキャリア７がコンベア５に載置されるとと
もに、加熱炉４の温度が所定温度に変更される。そし
て、コンベア５は逆ピッチ送り動作（図中右方向）を開
始し、成形室３での成形工程が始まる。During this time, the carrier 7 on which the preform 6 to be molded in the molding chamber 3 in the next step is placed on the conveyor 5, and the temperature of the heating furnace 4 is changed to a predetermined temperature. Then, the conveyor 5 starts the reverse pitch feeding operation (rightward in the figure), and the forming process in the forming chamber 3 starts.
以下、本発明に係るガラス光学素子の成形装置の実施
例について図面を参照しながら詳細に説明する。Hereinafter, embodiments of the apparatus for forming a glass optical element according to the present invention will be described in detail with reference to the drawings.
第２図および第３図は実施例を示し、第２図は、一部
を断面した成形装置の正面図、第３図は部分拡大断面図
である。2 and 3 show an embodiment, FIG. 2 is a front view of the molding apparatus with a partial cross section, and FIG. 3 is a partially enlarged cross sectional view.
１は成形装置で、この成形装置１は同一構成の成形室
２と成形室３とが配設されている。成形室２と成形室３
との間には加熱室４が設けられ、成形室2,成形室３およ
び加熱炉４の内部を貫通するコンベア５が設けしられて
いる。Reference numeral 1 denotes a molding apparatus, which includes a molding chamber 2 and a molding chamber 3 having the same configuration. Molding room 2 and molding room 3
A heating chamber 4 is provided therebetween, and a conveyor 5 penetrating the inside of the molding chamber 2, the molding chamber 3 and the heating furnace 4 is provided.
各成形室2,3には加熱炉４と反対側面に同一構成のア
ニール炉８およびアニール炉９が隣接設置されている。In each of the molding chambers 2 and 3, an annealing furnace 8 and an annealing furnace 9 having the same configuration are installed adjacent to the side opposite to the heating furnace 4.
成形室２における加熱炉４およびアニール炉８と接す
る両側面開口部には開閉用シャッタ10,11が設けられ、
同様に成形室３の両側面開口部には開閉用シャッタ12,1
3が設けられている。各開閉用シャッタ10,11,12,13は成
形室2,3の上部側面に固設されたシリンダ14にシリンダ
軸15を介して接続され、上下方向に開閉自在に構成され
ている。Opening and closing shutters 10 and 11 are provided at openings on both sides of the molding chamber 2 which are in contact with the heating furnace 4 and the annealing furnace 8, respectively.
Similarly, opening and closing shutters 12 and 1 are provided at both side openings of the molding chamber 3.
Three are provided. Each of the opening / closing shutters 10, 11, 12, 13 is connected via a cylinder shaft 15 to a cylinder 14 fixedly provided on the upper side surface of the molding chambers 2, 3, and is configured to be capable of opening and closing vertically.
成形室２内の上ベース16下面には上型マウント17が固
設され、上型マウント17上部側面には上型ヒータ18が設
置されている。上型19はリング20により上型マウント17
に着脱可能に取着されるとともに、上型ヒータ18の熱が
上型マウント17を介して伝達するように構成されてい
る。成形室２の下ベース21中央部には駆動源（図示省
略）に連結され上下動自在なプレス軸22が嵌合し、プレ
ス軸22の上端には下型マウント23が固設されている。下
型24は、前記上型19と同様にリング25により下型マウン
ト23に着脱可能に取着されるとともに、下型ヒータ26に
より加熱され、成形室２内を上下動可能に構成されてい
る。An upper mount 17 is fixed to the lower surface of the upper base 16 in the molding chamber 2, and an upper heater 18 is installed on the upper side surface of the upper mount 17. Upper die 19 is mounted on upper die 17 by ring 20
The upper heater 18 is configured to be detachably attached to the heater and to transmit heat of the upper heater 18 via the upper mount 17. A press shaft 22 that is connected to a drive source (not shown) and that can move up and down is fitted to the center of the lower base 21 of the molding chamber 2, and a lower mold mount 23 is fixed to the upper end of the press shaft 22. The lower mold 24 is detachably attached to the lower mold mount 23 by a ring 25 similarly to the upper mold 19, is heated by a lower mold heater 26, and is configured to be able to move up and down in the molding chamber 2. .
成形室３の前カバー27は上下２ヶ所の開口部を有し、
各開口部にはそれぞれ上ガラス扉28,下ガラス扉29が開
閉可能に設けられている。この上下ガラス扉28,29は、
閉じた状態では成形室３内の状況が視認できるように、
また開けた状態では成形室３内の型交換等ができるよう
に構成されている。The front cover 27 of the molding chamber 3 has two upper and lower openings,
An upper glass door 28 and a lower glass door 29 are provided at each opening so as to be openable and closable. These upper and lower glass doors 28 and 29
In the closed state, the condition inside the molding chamber 3 can be visually recognized.
In the opened state, the mold in the molding chamber 3 can be replaced.
加熱炉４内は開閉可能なシャッタ30と仕切り31とによ
り左加熱炉32と右加熱炉33とに分離されている。加熱炉
４の外壁34,シャッタ30および仕切り31は全て断熱機能
を有し、左右加熱炉32,33は互いの炉温に殆ど影響され
ることなく独立して機能し得るように構成されている。The inside of the heating furnace 4 is separated into a left heating furnace 32 and a right heating furnace 33 by a shutter 30 and a partition 31 that can be opened and closed. The outer wall 34, the shutter 30, and the partition 31 of the heating furnace 4 all have a heat insulating function, and the left and right heating furnaces 32, 33 are configured to be able to function independently without being largely influenced by the furnace temperature of each other. .
各成形室2,3、加熱炉４および各アニール炉8,9を貫通
するコンベア５は、駆動装置（図示省略）により左右両
方向へ所定ピッチで送り可能に構成されるとともに、キ
ャリアを載置する載置孔5aが一定間隔で穿設されてい
る。The conveyor 5 penetrating the molding chambers 2 and 3, the heating furnace 4, and the annealing furnaces 8 and 9 is configured to be able to be fed at a predetermined pitch in both the left and right directions by a driving device (not shown), and mounts a carrier. The mounting holes 5a are formed at regular intervals.
以上の構成から成る成形装置１は、成形工程に入る前
に成形室２内の上型19および下型24を上下型ヒータ18,2
6により所定温度に加熱する。右加熱炉33は予備加熱炉
として成形するガラスの転移点よりやや低めの温度に設
定する。左加熱炉32は本加熱炉として成形するガラスの
軟化点より高い温度に設定する。アニール炉８は成形レ
ンズの歪除去のために設定するガラスの除歪点よりやや
高い温度に設定する。下型24の先端が貫通可能な孔7aを
形成したキャリア７の内部にプリフォーム６を載置す
る。このキャリア７をコンベア５の載置孔5aに載置す
る。In the molding apparatus 1 having the above-described configuration, the upper mold 19 and the lower mold 24 in the molding chamber 2 are heated by the upper and lower mold heaters 18,
Heat at 6 to a predetermined temperature. The right heating furnace 33 is set at a temperature slightly lower than the transition point of the glass to be formed as a preheating furnace. The left heating furnace 32 is set to a temperature higher than the softening point of the glass to be formed as the main heating furnace. The annealing furnace 8 is set to a temperature slightly higher than the strain removal point of the glass set for removing the distortion of the molded lens. The preform 6 is placed inside the carrier 7 having the hole 7a through which the tip of the lower mold 24 can penetrate. The carrier 7 is placed in the placement hole 5a of the conveyor 5.
一方、成形室３内の上下型ヒータおよびアニール炉９
はOFF状態であり、成形室３両側のシャッタ12,13も上昇
して開いた状態である。On the other hand, the upper and lower heaters and the annealing furnace 9 in the molding chamber 3
Is OFF, and the shutters 12, 13 on both sides of the molding chamber 3 are also raised and opened.
成形工程は、まずシャッタ10,シャッタ11およびシャ
ッタ30を同時に開き、コンベア５を１ピッチ分左方向に
送り、コンベア５上に載置され右加熱炉33内にあったキ
ャリア７を左加熱炉32内へ、左加熱炉32内にあったキャ
リア７を成形室２内に搬送する。そして、各シャッタ1
0,11,30が同時に閉じる。この時、成形室２内および左
加熱炉32内に搬送されたキャリア７に載置されるプリフ
ォーム６はそれぞれ所定温度に昇温されている。In the forming step, first, the shutter 10, the shutter 11, and the shutter 30 are simultaneously opened, the conveyor 5 is sent leftward by one pitch, and the carrier 7 placed on the conveyor 5 and in the right heating furnace 33 is moved to the left heating furnace 32. The carrier 7 in the left heating furnace 32 is transferred into the molding chamber 2. And each shutter 1
0,11,30 are closed at the same time. At this time, the preform 6 placed on the carrier 7 transported into the molding chamber 2 and the left heating furnace 32 has been heated to a predetermined temperature.
成形室２に搬送されたキャリア７に対して下型24がプ
レス軸22に上昇に伴い上昇し、プリフォーム６を持ち上
げ上型19との間でこれを成形する。成形後、下型24は下
降して成形されたレンズをキャリア７に再び載置する。
各シャッタ10,11,30を開き、コンベア５を１ピッチ分左
方向に送り成形室２内のキャリア７はアニール炉８内に
搬送され、成形室２内には左加熱炉32から次のキャリア
７が搬送されてくる。以上の繰り返しにより成形室２内
で所要数のレンズが成形される。With respect to the carrier 7 conveyed to the molding chamber 2, the lower mold 24 rises with the elevation of the press shaft 22, lifts the preform 6 and forms it with the upper mold 19. After molding, the lower mold 24 descends and mounts the molded lens on the carrier 7 again.
Each of the shutters 10, 11, and 30 is opened, the conveyor 5 is moved leftward by one pitch, and the carrier 7 in the molding chamber 2 is transported into the annealing furnace 8, and the next carrier from the left heating furnace 32 into the molding chamber 2. 7 is conveyed. By repeating the above, a required number of lenses are formed in the forming chamber 2.
成形室２内で成形がおこなわれている間に、成形室３
では既に成形を完了した型の交換作業が行われ、次に成
形する型のヒートアップが開始される。While molding is being performed in the molding chamber 2, the molding chamber 3
Then, a mold exchange operation for a mold that has already been completed is performed, and heat-up of the mold to be molded next is started.
成形室２での成形が完了すると、成形室２内の上下型
ヒータ18,26およびアニール炉８がOFFされ、アニール炉
９がONされる。また、左加熱炉32は、予備加熱炉とし
て、右加熱炉33は本加熱炉として機能するようにそれぞ
れの所定温度に変更される。そして、コンベア５上に供
給されるキャリア７には、次の成形工程において成形室
３で成形されるプリフォーム６が載置されている。この
後、コンベア５を成形室２で成形していた時とは逆の右
方向に送り始め、次の成形工程が開始される。When the molding in the molding chamber 2 is completed, the upper and lower heaters 18 and 26 and the annealing furnace 8 in the molding chamber 2 are turned off and the annealing furnace 9 is turned on. Further, the left heating furnace 32 is changed to a predetermined temperature so as to function as a preliminary heating furnace, and the right heating furnace 33 is changed to a predetermined temperature so as to function as a main heating furnace. Then, on the carrier 7 supplied on the conveyor 5, a preform 6 to be molded in the molding chamber 3 in the next molding step is placed. Thereafter, the conveyer 5 starts to be fed rightward, which is opposite to the direction in which the conveyor 5 was being formed in the forming chamber 2, and the next forming step is started.
本実施例によれば、型交換という段取り作業を外段取
りできることにより生産性が著しく向上する。According to the present embodiment, productivity can be remarkably improved because the setup work of changing the mold can be set up outside.
以上説明したように、本発明に係るガラス光学素子の
成形装置によれば、各々にマウントと加圧系を有した複
数の成形室を有しているので、型交換に要する時間を全
て外段取化でき、大幅な稼働率の向上に寄与できる。ま
た、緊急の生産指示に対しても交換すべき型の選択と成
形条件の入力のみで即対応できる。さらに、上下型精度
を出すために複雑な駆動機構を用いる事も不要であり、
搬送系、加熱炉は共有であるので成形機コストの低減に
もつながるものである。As described above, according to the glass optical element molding apparatus according to the present invention, since each of the molding chambers has a plurality of molding chambers each having a mount and a pressure system, the time required for mold replacement can be completely reduced by the outer stage. And can contribute to a significant improvement in operation rate. In addition, an urgent production instruction can be immediately responded only by selecting a mold to be exchanged and inputting molding conditions. Furthermore, it is not necessary to use a complicated drive mechanism to obtain the upper and lower mold accuracy,
Since the transfer system and the heating furnace are shared, the cost of the molding machine can be reduced.
第１図は本発明に係るガラス光学素子の成形装置の概念
図、第２図および第３図は同実施例を示し、第２図は一
部を断面した成形装置の正面図、第３図は部分拡大断面
図である。 １…成形装置 2,3…成形室 ４…加熱室 ５…コンベア ６…プリフォーム ７…キャリア 8,9…アニール炉 10,11,12,13,30…シャッタ 14…シリンダ 15…シリンダ軸 16…上ベース 17…上型マウント 18…上型ヒータ 19…上型 20,25…リング 21…下ベース 22…プレス軸 23…下型マウント 24…下型 26…下型ヒータ 27…前カバー 28…上ガラス扉 29…下ガラス扉 31…仕切り 32…左加熱炉 33…右加熱炉1 is a conceptual view of a glass optical element forming apparatus according to the present invention, FIGS. 2 and 3 show the same embodiment, FIG. 2 is a front view of a partially sectioned forming apparatus, and FIG. Is a partially enlarged sectional view. DESCRIPTION OF SYMBOLS 1 ... Molding apparatus 2,3 ... Molding chamber 4 ... Heating chamber 5 ... Conveyor 6 ... Preform 7 ... Carrier 8,9 ... Annealing furnace 10,11,12,13,30 ... Shutter 14 ... Cylinder 15 ... Cylinder shaft 16 ... Upper base 17 ... Upper mount 18 ... Upper heater 19 ... Upper die 20, 25 ... Ring 21 ... Lower base 22 ... Press shaft 23 ... Lower mount 24 ... Lower die 26 ... Lower heater 27 ... Front cover 28 ... Upper Glass door 29 ... Lower glass door 31 ... Partition 32 ... Left heating furnace 33 ... Right heating furnace
Claims (1)
間に光学素子素材を介在させて押圧し、光学素子を成形
するガラス光学素子の成形装置において、前記成形室を
複数配設し、この配設された成形室の間に加熱炉を設け
るとともに、各成形室と加熱炉とを貫通する搬送部材を
設けたことを特徴とするガラス光学素子の成形装置。1. A glass optical element molding apparatus for molding an optical element by interposing and pressing an optical element material between a pair of detachable molds provided in a molding chamber, wherein a plurality of the molding chambers are provided. A molding furnace provided between the provided molding chambers, and a conveying member penetrating each molding chamber and the heating furnace is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2150885A JP2749431B2 (en) | 1990-06-08 | 1990-06-08 | Glass optical element molding equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2150885A JP2749431B2 (en) | 1990-06-08 | 1990-06-08 | Glass optical element molding equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0442821A JPH0442821A (en) | 1992-02-13 |
| JP2749431B2 true JP2749431B2 (en) | 1998-05-13 |
Family
ID=15506512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2150885A Expired - Fee Related JP2749431B2 (en) | 1990-06-08 | 1990-06-08 | Glass optical element molding equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2749431B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08144072A (en) * | 1994-11-18 | 1996-06-04 | Nec Corp | Dry etching device |
-
1990
- 1990-06-08 JP JP2150885A patent/JP2749431B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0442821A (en) | 1992-02-13 |
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