JPS6048313A - Molding die for video disc - Google Patents
Molding die for video discInfo
- Publication number
- JPS6048313A JPS6048313A JP58154860A JP15486083A JPS6048313A JP S6048313 A JPS6048313 A JP S6048313A JP 58154860 A JP58154860 A JP 58154860A JP 15486083 A JP15486083 A JP 15486083A JP S6048313 A JPS6048313 A JP S6048313A
- Authority
- JP
- Japan
- Prior art keywords
- stamper
- ring
- mirror block
- standby
- video disc
- 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.)
- Pending
Links
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
- 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
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
- B29C43/3607—Moulds for making articles of definite length, i.e. discrete articles with sealing means or the like
-
- 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
- B29C2043/023—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 having a plurality of grooves
- B29C2043/025—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 having a plurality of grooves forming a microstructure, i.e. fine patterning
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Manufacturing Optical Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明はビデオディスク成形に係り、成形さレタティス
クの表面の平面度を向上するためにスタンパ外周保持リ
ングに０１Ｊングを付加したビデオディスク成形金型に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to video disc molding, and relates to a video disc molding die in which an 01J ring is added to a stamper outer circumferential holding ring in order to improve the flatness of the surface of a molded retattice. It is related to.
従来のビデオディスク成形金型において、可動側金型に
スタンバを取シ付ける機構を第１図に示す。FIG. 1 shows a mechanism for attaching a stand bar to a movable mold in a conventional video disc mold.
高圧樹脂がディスクキャビティ１１に充填すれるとキャ
ビティに溜っていた空気、ゴミ、樹脂から発生するガス
等がスタンパ外周保持リング１のつめ部とスタンバ表面
７によって作られるわずかなスキマ９からスタンバ裏面
８（！−ミラーブロック２の表面のスキマ１０に浸入す
る。このスタンバ裏面側に浸入した空り、ゴミ、ガスは
逃げ場を無くシ、スタンバを裏面よシディスクキャビテ
ィ側に押し上げるためスタンバ表面側に形成されるディ
スクの表面精度すなわち平面度を著しく悪化させていた
。また、スタンバ裏面８に付着したゴミ、ガス成分が固
体化したものがスタンバおよびミラーブロックを傷つけ
、金型、スタンバの寿命を著しく短かいものとしてｂた
。When the high-pressure resin is filled into the disc cavity 11, the air, dust, gas generated from the resin, etc. that have accumulated in the cavity are removed from the slight gap 9 created by the claws of the stamper outer periphery retaining ring 1 and the stamper surface 7 to the stamper back surface 8. (!- It penetrates into the gap 10 on the surface of the mirror block 2. The air, dirt, and gas that have penetrated into the back side of the standby have no place to escape, and are formed on the front side of the standby in order to push the standby up from the back side toward the disc cavity. The surface precision, that is, the flatness, of the disk that is being used is significantly deteriorated.Furthermore, solidified dust and gas components attached to the back surface 8 of the standber damage the standby and mirror block, significantly shortening the life of the mold and the standby. It was used as a shell.
本発明の目的は、成形後のディスクの表面精度の初期精
゛度を長期間保持し、さらにスタンバ。The object of the present invention is to maintain the initial surface precision of the disk after molding for a long period of time, and to further improve the standby quality.
金型の寿命を長くすることにある。The purpose is to extend the life of the mold.
成形時のキャビティから排出される空気、ゴミ、ガス成
分のミラーブロック表面への回シ込み浸入を防止するに
はスタツフくを保持するスタンバおさえ外周リングの厚
さを増し、スタツフ（表Ｔｋ＋を強くおさえ込みスキマ
を無くせば良い７５；金型材質とスタンバ材質は異質材
であり、熱膨張率が相違するためスタツフ（が成形時の
冷熱サイクルで自由に伸縮できるように必ずスタツフ（
が動けるスキマを設けなくてはならない。そこで、スタ
ンバは自由に動くことができるが、空気、ゴミ、ガス成
分は浸入しないフレキシフ゛ル気密機構としてスタツフ
く外周保持リングとスタンバ表面の間に０リングを組込
むことを考案した。０リング材質をゴム等の弾性体にし
、その弾性力を最適にすれはスタツフ（の熱伸縮（ま自
由にでキ、シかもミラーブロック、スタツフ（裏面間の
気密性を保つことが可能である。To prevent air, dust, and gas components discharged from the cavity during molding from entering the surface of the mirror block, increase the thickness of the outer circumferential ring that holds the stand bar and tighten the stud (table Tk+). All you have to do is eliminate the hold-down gap 75; The mold material and standby material are different materials and have different coefficients of thermal expansion.
It is necessary to create a gap in which people can move. Therefore, we devised the idea of incorporating an O-ring between the outer peripheral retaining ring and the surface of the stanbar as a flexible airtight mechanism that allows the stanbar to move freely but prevents air, dust, and gas components from entering. By using an elastic material such as rubber as the O-ring material, and optimizing its elasticity, it is possible to maintain airtightness between the mirror block and the stud (the back side of the stud). .
本発明の実施例を第２図により説明する。 An embodiment of the present invention will be explained with reference to FIG.
第２ 図は、光デイスク成形金型におけるスタンバ取付
側金型すなわち、可動側金型のスタンバ外周リング機構
部の断面図を示すものである。FIG. 2 is a cross-sectional view of the standby outer circumferential ring mechanism of the standbar attachment side mold, that is, the movable side mold, in the optical disk mold.
モールドベース４に可動側ミラーブロック２が組込まれ
ておシ、その表面６は鏡面仕上げになっている。このミ
ラーブロック２の表面とスタンバ３の裏面側が正対する
ようにスタンバ３を組込みスタンバ外周保持リングでス
タンバ６の外周端部を保持し、ボルト５で固定するのが
通常のスタンバ保持法である。このような通常の方法で
はスキマ９から突入する空気、ゴミ、ガス成分のスキマ
１０（第１図）への浸入は防止できない。A movable mirror block 2 is assembled into a mold base 4, and its surface 6 has a mirror finish. A normal method for holding a stand bar is to assemble the stand bar 3 so that the front surface of the mirror block 2 and the back side of the stand bar 3 directly face each other, hold the outer peripheral end of the stand bar 6 with a stand bar outer circumferential retaining ring, and fix it with bolts 5. Such a conventional method cannot prevent air, dirt, and gas components entering the gap 9 from entering the gap 10 (FIG. 1).
本発明ではスキマ９を完全に気密化するためスタンバ外
周保持リング１のスタンパ保持つめ部に溝切シを行ない
、その溝に０リンク１７を組込み、０リングの弾性力で
スタンバ５を押え込１んだ。これによりスタンバはミラ
ーブロック表面６とも密着し、空気、ゴミ、ガス成分等
のスキマ１０への浸入を完全に防止することができたス
タンバの熱膨張による寸法変化はｏ ＩＩソングおしつ
叶力よシ充分に大きいため、自由に伸縮できた。In the present invention, in order to make the gap 9 completely airtight, a groove is cut in the stamper holding pawl of the standby outer periphery holding ring 1, and an O link 17 is installed in the groove, and the standby 5 is held down by the elastic force of the O ring. I did. As a result, the stub bar comes into close contact with the mirror block surface 6, completely preventing air, dust, gas components, etc. from entering the gap 10. Dimensional changes due to thermal expansion of the stan bar can be prevented. It was large enough that it could be expanded and contracted freely.
本発明によれば、ミラーブロック表面とスタンバ裏面が
正対するスキマに異物が浸入しないので、従来では１０
０枚のディスクを成形するとディスク表面の平面度劣化
、すなわち面振れが１Ｇから５Ｇ、１０００枚で８Ｇま
で劣化したものが３０００枚成形後も１Ｇ以下の性能を
保持できることになった。According to the present invention, foreign matter does not enter into the gap between the mirror block surface and the back surface of the standby.
When 0 discs were molded, the flatness of the disc surface, that is, the surface runout, deteriorated from 1G to 5G, and after 1000 discs it deteriorated to 8G, but even after 3000 discs were molded, the performance was maintained at 1G or less.
また、ミラーブロックの鏡面のキズも大巾に減少し、ミ
ラーブロックの再研摩までの時間を大ｌ〕に延ばすこと
ができる。Furthermore, the number of scratches on the mirror surface of the mirror block is greatly reduced, and the time required for re-polishing the mirror block can be greatly extended.
第１図は従来例を示す断面図、第２図は本発明の一実施
例の光デイスク成形金型のスタンバ外周保持機構部の側
断面図である。
１・・・スタンバ外周保持リング、
２・・・可動側ミラーブロック、
６・・・スタンバ、
４・・・可動側金型モールドベース、
５・・・スタンバ外周保持１１ング固定ボルト、６・・
・ミラーブロック表面、
７・・・スタンバ表面、
８・・・スタンバ裏面、
９・・・スタンバ保持スキマ、
１０・・・ミラーブロック表面とスタンバ裏面のスキマ
、１１・・・ディスクキャビティ、
１２・・・モールドベースパーティング面、１３・・・
固定側リング、
１４・・・固定側ミラーブロック、
１５・・・固定側金型モールドベース、１６・・・固定
１１ング組込みボルト、１７・・・０リング。
代理人弁理士 高 橋 明 夫
オ１図
寸 ？ 図FIG. 1 is a sectional view showing a conventional example, and FIG. 2 is a side sectional view of a stanbar outer periphery holding mechanism portion of an optical disk molding die according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Stand bar outer periphery holding ring, 2... Movable side mirror block, 6... Stand bar, 4... Movable side mold mold base, 5... Stand bar outer periphery holding 11 ring fixing bolt, 6...
・Mirror block surface, 7...standbar surface, 8...standbar back surface, 9...standbar holding gap, 10...keep between mirror block surface and standbar back surface, 11...disk cavity, 12...・Mold base parting surface, 13...
Fixed side ring, 14... Fixed side mirror block, 15... Fixed side mold mold base, 16... Fixing 11 ring assembly bolt, 17... 0 ring. Representative Patent Attorney Akio Takahashi 1 size? figure
Claims (1)
スク成形金型を用いて、スタンパ外周保持リングのスタ
ンバおさえ部から異物が進入しない手段を設けたことを
特徴とするビデオディスク成形金型。[Claims] 1. Mirror block, stand bar outer periphery holding ring. A video disc molding die comprising a standby and a mold paste, and characterized in that a means is provided to prevent foreign matter from entering from a standby holding portion of a stamper outer periphery holding ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58154860A JPS6048313A (en) | 1983-08-26 | 1983-08-26 | Molding die for video disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58154860A JPS6048313A (en) | 1983-08-26 | 1983-08-26 | Molding die for video disc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6048313A true JPS6048313A (en) | 1985-03-16 |
Family
ID=15593490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58154860A Pending JPS6048313A (en) | 1983-08-26 | 1983-08-26 | Molding die for video disc |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6048313A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4790738A (en) * | 1986-11-20 | 1988-12-13 | Meiki Co., Ltd. | Injection mold having rotatable stamper holding ring |
-
1983
- 1983-08-26 JP JP58154860A patent/JPS6048313A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4790738A (en) * | 1986-11-20 | 1988-12-13 | Meiki Co., Ltd. | Injection mold having rotatable stamper holding ring |
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