JPH01166926A - Molding equipment for optical disc and the like - Google Patents

Molding equipment for optical disc and the like

Info

Publication number
JPH01166926A
JPH01166926A JP32543087A JP32543087A JPH01166926A JP H01166926 A JPH01166926 A JP H01166926A JP 32543087 A JP32543087 A JP 32543087A JP 32543087 A JP32543087 A JP 32543087A JP H01166926 A JPH01166926 A JP H01166926A
Authority
JP
Japan
Prior art keywords
ring member
stamper holder
sleeve
mold
inner ring
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
Application number
JP32543087A
Other languages
Japanese (ja)
Inventor
Toshifumi Tanaka
敏文 田中
Yasuo Ohira
大平　康夫
Toshihiko Ishida
俊彦 石田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDK Corp
Original Assignee
TDK Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TDK Corp filed Critical TDK Corp
Priority to JP32543087A priority Critical patent/JPH01166926A/en
Publication of JPH01166926A publication Critical patent/JPH01166926A/en
Pending legal-status Critical Current

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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/263—Moulds with mould wall parts provided with fine grooves or impressions, e.g. for record discs
    • B29C45/2632—Stampers; Mountings thereof
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/263—Moulds with mould wall parts provided with fine grooves or impressions, e.g. for record discs
    • B29C45/2632—Stampers; Mountings thereof
    • B29C2045/264—Holders retaining the inner periphery of the stamper
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/43—Removing or ejecting moulded articles using fluid under pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Manufacturing Optical Record Carriers (AREA)

Abstract

PURPOSE:To prevent a disc-shaped medium from deforming at releasing by a structure wherein an inner ring member including an inner stamper holder is slidably provided and a screw shaft, which abuts against the tapered part formed on the outer periphery of the inner ring member, is retractably provided on a movable mold. CONSTITUTION:After material is injected, dwelled, compression-molded and cooled down, molds are opened and a runner ejector sleeve 6 is ejected. At that time, by screwing in a screw shaft 15 so as to push a tapered part 51, an inner stamper holder 5 is ejected through an inner ring member 52, a molded item is released from the molds by being pushed by the ejection surfaces of both the sleeve and the inner stamper holder and, at the same time, air or gas is forced in from an air blasting slit S, resulting in allowing to easily and infallibly release the item from the molds. Further, since the ejecting area of the ejector sleeve 6 is made larger by providing a tapered part, the deformation, angle of warpage, deflection and the like of the molded item due to the unbalance at ejection is suppressed as small as possible, resulting in allowing to mass-produce highly accurate and favorable quality product.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、光ディスク、光磁気ディスクなどのディスク
状媒体を射出成型するための光ディスク等用成型装置に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a molding apparatus for optical discs, etc., for injection molding disc-shaped media such as optical discs and magneto-optical discs.

〔従来の技術〕[Conventional technology]

一般に、情報記録担体としての光ディスク又は光磁気デ
ィスクなどの情報デイヌクはディスク用金型で射出成型
される成形品となっていて、従来この種の成型装置では
製品取出しの際に、離型するための成形品突出しにおい
ては第３図に示すように可動側金型ａにある、スタンパ
−押えｂとスリーブＣとの間に形成されるエア及びガス
吹出しスリットＳよりエア及びガスを吹出しつつスリー
ブにより、製品Ｍをスタンパ−から離型することが行わ
れている。In general, information recording carriers such as optical discs or magneto-optical discs are molded products that are injection-molded in a disc mold. Conventionally, in this type of molding equipment, when taking out the product, the mold was released. In ejecting the molded product, air and gas are blown out from the air and gas blowing slit S formed between the stamper holder b and the sleeve C in the movable mold a as shown in FIG. , the product M is released from the stamper.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

ところが、この゛従来の成型装置におけるエア及びガス
吹出しスリットＳは製品面に位置しているので、パリ防
止のため、エア吹出しスリットＳの巾を小さくしなけれ
ばならない。この結果、離型エア及びガスを均一に強く
吹出すことができず、また突出しスリーブでの突出し範
囲、即ち大きさは突出しスリーブの直径に限・られてし
まっていて突出しスリーブの小さな突出面積で離型する
ため・　　成形ディスクの突出部分（基板部分）がフレ
やソリなど変形原因となりやすく離型不良が発生し、複
屈折ムラ、形状の変形等の重大な欠陥ガ（発生し、しか
も成形基板はポリカーボネート樹脂で作られると約１２
０℃に近い高温度で成形品を取り出すこととなり、この
成形品突出し面が小さいため突出し時のアンバランスに
よる変形、即ち基板部分に凹凸のゆがみやそりができた
りして一層品質が低下する傾向があって、この振れやそ
りが大きいとレーザーがトラックを追従できなくなって
製品不良となり、加工精度も信転性の上でも問題が生じ
やすかった。However, since the air and gas blowing slit S in this conventional molding apparatus is located on the product surface, the width of the air blowing slit S must be made small to prevent flaking. As a result, it is not possible to blow out mold release air and gas uniformly and strongly, and the protruding range of the ejecting sleeve, that is, the size, is limited to the diameter of the ejecting sleeve, and the small protruding area of the ejecting sleeve Due to mold release, the protruding part of the molded disk (substrate part) tends to cause deformation such as warping and warping, resulting in mold release failure, and serious defects such as birefringence unevenness and shape deformation (occurrence). is made of polycarbonate resin and is approximately 12
The molded product must be taken out at a high temperature close to 0°C, and since the projecting surface of the molded product is small, the quality tends to deteriorate further due to deformation due to unbalance during ejection, that is, uneven distortion or warping on the substrate part. If the runout or warpage was large, the laser could no longer follow the track, resulting in product defects, and problems were likely to occur in terms of processing accuracy and reliability.

本発明は、これら従来の欠点を適確に除去しようとする
もので、ディスク状媒体の離型を大きな面積で精度よく
行い生産性も向上でき、離型時での変形も防ぎ信韻性も
品質も大幅に高めることが可能である光ディスク等用成
型装置を構成簡単で安価に提供することを目的としたも
のである。The present invention aims to accurately eliminate these conventional drawbacks, and it is possible to accurately release a disk-shaped medium over a large area, improve productivity, prevent deformation during release, and improve reliability. The object of the present invention is to provide a molding device for optical discs, etc., which has a simple configuration and is inexpensive, which can significantly improve quality.

〔問題点を解決するための手段〕[Means for solving problems]

本発明は、ディスク状情報媒体を成形するための固定側
金型と可動側金型とを対向配備し、両金型間に介在され
るスタンパ−１０を定着するためのアウタスタンパ−押
え４を含むアウタリング部材３と、インナスタンパ−押
え５を含むインナリング部材５．とを備え、該インナス
タンパー押え５の内側に成形品離型突出′しスリーブ６
を配設し、該スリーブ６中にゲートカットバンチ９及び
ランナ突出しピン７を摺動自在に備えると共に、前記イ
ンナスタンパ−押え５と突出しスリーブ６との間に離型
用のエア吹出しスリットＳを形成した成型装置において
、前記インナリング部材５寞を摺動可能に設け、その外
周に勾配部５．を形成し、該勾配部５．に当接するスク
リューシャフト１５を進退自在に可動側金型２に配備し
たことを特徴とする光ディスク等用成型装置である。In the present invention, a fixed mold and a movable mold for molding a disk-shaped information medium are disposed facing each other, and an outer stamper presser 4 for fixing a stamper 10 is interposed between the two molds. an outer ring member 3 including an inner ring member 5 including an inner stamper presser 5; A molded product release protruding sleeve 6 is provided inside the inner stamper holder 5.
A gate cut bunch 9 and a runner ejection pin 7 are slidably provided in the sleeve 6, and an air blowing slit S for mold release is provided between the inner stamper holder 5 and the ejection sleeve 6. In the formed molding device, the inner ring member 5 is slidably provided, and a slope portion 5 is formed on the outer periphery of the inner ring member 5. forming the slope portion 5. This is a molding device for optical discs, etc., characterized in that a screw shaft 15 that comes into contact with the movable mold 2 is provided in a movable mold 2 so as to be able to move forward and backward.

〔実施例〕〔Example〕

本発明の実施例を第１〜２図で説明すると、ディスク状
情報媒体を成形するための固定側金型１と可動側金型２
とを対“向配備し、両“金型１．２間に介在されるスタ
ンパ−１０を定着するためのアウタスタンパ−押え４を
含むアウタリング部材３と、インナスタンパ−押え５を
含むインナリ”ング部材５□とを備えたものからなるも
のであって、前記可動側金型２にスリーブ６中、ゲート
カットバンチ９とランナ突出しピン−７、また固定側金
型１にはスプルーブツシュ８とリング部材３とを夫々備
えると共に、前記インナスタンパ−押え５の内側に成形
品離型突出しスリーブ６を配設し、該スリーブ６中にゲ
ートカットパンチ９及びランナ突出しピン７を摺動自在
に備えていて、前記インナスタンパ−押え５と突出しス
リーブ６との間に離型用のエア吹出しスリットＳを形成
した成型装置において、前記インナスタンパ−押え５を
摺動可能に設け、その外周に勾配部５１を形成し、該勾
配部５．に当接するスクリューシャフト１５を進退自在
に可動側金型２に配備した光ディスク等用成型装置とし
である。Embodiments of the present invention will be described with reference to FIGS. 1 and 2. A fixed mold 1 and a movable mold 2 for molding a disk-shaped information medium
an outer ring member 3 including an outer stamper holder 4 for fixing the stamper 10 interposed between both molds 1 and 2, and an inner ring member 3 including an inner stamper holder 5. The movable mold 2 has a sleeve 6, a gate cut bunch 9 and a runner ejecting pin 7, and the fixed mold 1 has a sprue bush 8. and a ring member 3, and a molded product release ejection sleeve 6 is disposed inside the inner stamper holder 5, and a gate cut punch 9 and a runner ejection pin 7 are slidably inserted into the sleeve 6. In the molding apparatus, the inner stamper holder 5 is slidably provided, and an air blowing slit S for mold release is formed between the inner tamper holder 5 and the protruding sleeve 6. This is a molding device for optical discs, etc., in which a screw shaft 15 is provided in a movable mold 2 so as to be able to move forward and backward, and a screw shaft 15 that contacts the sloped portion 51 is formed.

この場合、前記勾配部５．としては、大径より小径に漸
次変化する錐状筒部であってキャビティ側を大径とした
リング状の凹溝で構成して、スクリューシャフト１５の
押し込みでキャビティ側にインナリング部材５８を介し
てインナスタンパ−押え５が移動できるようにしｋもの
で、クローズ形態になっていて金属粉カー基板に付着し
たり、スタンパ−に損傷を与えないようにしである。ま
た該スクリューシャフト１５は可動側金型２に設けた軸
孔１６に嵌挿され、一部に形成されたネジ部１５＋で螺
合され進退移動できるようにしである。In this case, the slope portion 5. This is a conical cylinder whose diameter gradually changes from a large diameter to a small diameter, and is composed of a ring-shaped concave groove with a large diameter on the cavity side. This allows the inner stamper holder 5 to move, and is in a closed form to prevent metal powder from adhering to the car substrate or damaging the stamper. Further, the screw shaft 15 is fitted into a shaft hole 16 provided in the movable mold 2, and is screwed together with a threaded portion 15+ formed in a part thereof, so that it can move forward and backward.

なお、前記スクリューシャフト１５としては必要に応じ
中空軸を用い、この中空部をエア通路として給気できる
構成としたものでもよい。The screw shaft 15 may be a hollow shaft if necessary, and the hollow portion may be used as an air passage for supplying air.

しかして、成形に際して可動側金型２を固定側金型１に
対して移動嵌合させたのち、加圧して型締したのち、両
金型１，２内のキャビデイ中に材料供給前に真空吸引し
てから原料供給ノズルで材料を射出し保圧しつつ圧縮成
形して（第２図（Ａ））冷却後、ゲートカットパンチ９
を移動してスプルーランナを切除し、開型して製品を取
出すことができる（第２図（Ｂ））が、ランナ突出しス
リーブ６を突き出しの際にスクリューシャフト１５を螺
じ込んで勾配部５Ｉを押せばインナリング部材５ｚを介
してインナスタンパー押え５が突出され、両者の突出し
面で成形品を押圧離型すると共に、エア吹出しスリット
Ｓからエア乃至ガスが圧入され、離型を容易適確に行う
ことができる（第２図（Ｃ）　）。Therefore, during molding, after the movable mold 2 is moved and fitted to the fixed mold 1, the mold is clamped by applying pressure, and then vacuum is applied to the cavities in both molds 1 and 2 before material is supplied. After suction, the material is injected with a raw material supply nozzle and compression molded while maintaining pressure (Fig. 2 (A)). After cooling, a gate cut punch 9 is applied.
The sprue runner can be removed by moving the sprue runner, the mold can be opened, and the product can be taken out (Fig. 2 (B)). When pressed, the inner stamper presser 5 is protruded through the inner ring member 5z, and the protruding surfaces of both press and release the molded product, and air or gas is pressurized through the air blowing slit S, making it easier and more accurate to release the mold. (Figure 2 (C)).

即ち、成形品の離型時の突出し面積が広くなる様にでき
る。That is, the protruding area of the molded product when it is released from the mold can be made larger.

なお、前記突出しスリーブ６はテーパ一部（図示せず）
を設けて突出し面積を大きいためにし成形品の突出し時
のアンバランスによる変形、そり角度、振れなどが極力
抑えられ精度高く、品質良好な製品を量産することが可
能となるように考慮してもよい。Note that the protruding sleeve 6 has a tapered portion (not shown).
In order to increase the ejection area by providing a good.

〔発明の効果〕〔Effect of the invention〕

本発明は、ディスク状情報媒体の離型時に、前記インナ
スタンパー押えを含むインナリング部材を摺動可能に設
け、その外周に勾配部を形成し、該勾配部に当接するス
クリューシャフトを進退自在に可動側金型に配備したこ
とで成形品の突出面積が大きくなっていることとなり、
成形製品の離型を良好に行え形状の変形がないし、成形
品突き出しのアンバランスによる変形、その角度、振れ
などの悪現象も発生せず加工精度良好に生産でき、品質
を著しく高められ偉績性を大幅に向上できると共に、デ
ィスクに対して悪影響を及ぼす不具合や劣化のおそれも
なく、成形作業取扱いも簡便で生産性も著しく良好であ
るなどの効果がある。In the present invention, when a disc-shaped information medium is released from the mold, an inner ring member including the inner stamper presser is slidably provided, a sloped part is formed on the outer periphery of the inner ring member, and a screw shaft that comes into contact with the sloped part can be moved back and forth. By deploying it in the movable mold, the protruding area of the molded product becomes larger.
The molded product can be released from the mold well, there is no deformation of the shape, and there is no deformation due to unbalanced protrusion of the molded product, its angle, runout, or other bad phenomena, allowing production with good processing accuracy, significantly improving quality, and excellent performance. In addition to being able to significantly improve the performance, there is no fear of defects or deterioration that would adversely affect the disk, and the molding process is easy to handle and the productivity is extremely high.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の実施例の縦断面図、第２図Ａ。 Ｂ、Ｃは使用状態のスタンパー押え部の作用説明図、第
３図は従来例のスタンパ−押え部の作用説明図である。 １・・・固定側金型、２・・・可動側金型、３・・・ア
ウタリング部材、４・・・アウタスタンパー押え、５・
・・インナスタンパー押え、５．・・・勾配部、５．・
・・インナリング部材、６・・・突出しスリーブ、７・
・・突出しピン、８・・・スプルーブツシュ、９・・・
ゲートカットパンチ、１０・・・スタンパ−１）５・・
・スクリューシャフト、１６・・・軸孔、Ｓ・・・エア
吹出しスリット。 特許　出　願　人　　ティーデイ−ケイ株式会社代理人
弁理士　　薬　師　　　稔FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, and FIG. 2A is a longitudinal sectional view of an embodiment of the present invention. B and C are diagrams illustrating the operation of the stamper holder in a used state, and FIG. 3 is a diagram illustrating the operation of a conventional stamper holder. DESCRIPTION OF SYMBOLS 1... Fixed side mold, 2... Movable side die, 3... Outer ring member, 4... Outer stamper holder, 5...
...Inner stamper holder, 5. ...gradient section, 5.・
...Inner ring member, 6...Protrusion sleeve, 7.
...Eject pin, 8...Sprue bush, 9...
Gate cut punch, 10... Stamper - 1) 5...
・Screw shaft, 16... shaft hole, S... air blowing slit. Patent applicant: Minoru Yakushi, patent attorney at TDC Co., Ltd.

Claims (3)

【特許請求の範囲】[Claims] （１）ディスク状情報媒体を成形するための固定側金型
（１）と可動側金型（２）とを対向配備し、両金型（１
）（２）間に介在されるスタンパー（１０）を定着する
ためのアウタスタンパー押え（４）を含むアウタリング
部材（３）と、インナスタンパー押え（５）を含むイン
ナリング部材（５＿２）とを備え、該インナスタンパー
押え（５）の内側に成形品離型突出しスリーブ（６）を
配設し、該スリーブ（６）中にゲートカットパンチ（９
）及びランナ突出しピン（７）を摺動自在に備えると共
に、前記インナスタンパー押え（５）と突出しスリーブ
（６）との間に離型用のエア吹出しスリット（Ｓ）を形
成した成型装置において、前記インナリング部材（５＿
２）を摺動可能に設け、その外周に勾配部（５＿１）を
形成し、該勾配部（５＿１）に当接するスクリューシャ
フト（１５）を進退自在に可動側金型（２）に配備した
ことを特徴とする光ディスク等用成型装置。(1) A fixed side mold (1) and a movable side mold (2) for molding a disk-shaped information medium are arranged facing each other, and both molds (1) are arranged facing each other.
)(2) An outer ring member (3) including an outer stamper holder (4) for fixing the stamper (10) interposed therebetween, and an inner ring member (5_2) including an inner stamper holder (5). A molded product release protrusion sleeve (6) is provided inside the inner stamper holder (5), and a gate cut punch (9) is provided in the sleeve (6).
) and a runner ejecting pin (7) in a slidable manner, and a mold release air blowing slit (S) is formed between the inner stamper holder (5) and the ejecting sleeve (6), The inner ring member (5_
2) is slidably provided, a sloped part (5_1) is formed on its outer periphery, and a screw shaft (15) that comes into contact with the sloped part (5_1) is arranged in the movable mold (2) so as to be able to move forward and backward. A molding device for optical discs, etc., characterized by: （２）前記勾配部（５＿１）が、大径から小径に漸次変
化する錐状筒部であってキャビティ側を大径としたもの
である特許請求の範囲第１項記載の成型装置。(2) The molding device according to claim 1, wherein the slope portion (5_1) is a conical tube portion that gradually changes from a large diameter to a small diameter, with the cavity side having a larger diameter. （３）前記スクリューシャフト（１５）が、中空軸であ
って、中空部をエア通路として給気できる構成としたも
のである特許請求の範囲第１項又は第２項記載の成型装
置。(3) The molding apparatus according to claim 1 or 2, wherein the screw shaft (15) is a hollow shaft, and the hollow portion is configured to be able to supply air as an air passage.
JP32543087A 1987-12-24 1987-12-24 Molding equipment for optical disc and the like Pending JPH01166926A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32543087A JPH01166926A (en) 1987-12-24 1987-12-24 Molding equipment for optical disc and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP32543087A JPH01166926A (en) 1987-12-24 1987-12-24 Molding equipment for optical disc and the like

Publications (1)

Publication Number Publication Date
JPH01166926A true JPH01166926A (en) 1989-06-30

Family

ID=18176769

Family Applications (1)

Application Number Title Priority Date Filing Date
JP32543087A Pending JPH01166926A (en) 1987-12-24 1987-12-24 Molding equipment for optical disc and the like

Country Status (1)

Country Link
JP (1) JPH01166926A (en)

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