JPS6235820A - Optical disc mold - Google Patents
Optical disc moldInfo
- Publication number
- JPS6235820A JPS6235820A JP17538585A JP17538585A JPS6235820A JP S6235820 A JPS6235820 A JP S6235820A JP 17538585 A JP17538585 A JP 17538585A JP 17538585 A JP17538585 A JP 17538585A JP S6235820 A JPS6235820 A JP S6235820A
- Authority
- JP
- Japan
- Prior art keywords
- stamper
- mold
- mirror plate
- movable side
- mirror
- 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
- 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
- B29C45/1742—Mounting of moulds; Mould supports
- B29C2045/1746—Mounting of moulds; Mould supports using magnetic means
-
- 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
- B29C2045/2638—Magnetic means for mounting stampers
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は射出成形機に係り、特に光ディスクを成形する
のに使用される光ディスク金型に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an injection molding machine, and particularly to an optical disc mold used for molding an optical disc.
（従来の技術）
光ディスクの成形に際しては、一般に、可動側金型にス
タンパが添設されるのであるが、このスタンパの固定は
、従来は、単に機械的に行なうだけであった。(Prior Art) When molding an optical disk, a stamper is generally attached to a movable mold, but in the past, this stamper was only fixed mechanically.
（発明が解決しようとする問題点）
上記のような従来例では、スタンパが可動側金型に密着
しないことがあり、スタンパに浮い。(Problems to be Solved by the Invention) In the conventional example as described above, the stamper may not come into close contact with the movable mold, and may float on the stamper.
た個所が生ずる。この状態で、溶融樹脂がキャビティに
充填されると、スタンパと可動側金型との間の空気が断
熱圧縮されるため、成形品にもや状の模様が表われる、
という問題があった。This will result in some areas. When the cavity is filled with molten resin in this state, the air between the stamper and the movable mold is adiabatically compressed, causing a mist-like pattern to appear on the molded product.
There was a problem.
本発明は、かかる問題点を解決するためになされたもの
で、スタンパと可動側金型との密着性が良好な光ディス
ク金型を得ることを目的とする。The present invention was made to solve this problem, and an object of the present invention is to obtain an optical disc mold with good adhesion between a stamper and a movable mold.
（問題点を解決するための手段）
本発明は、スタンパが添設される固定側または可動側金
型の何れか一方の鏡面部を帯磁させる、というものであ
る。(Means for Solving the Problems) The present invention is to magnetize the mirror surface portion of either the fixed mold or the movable mold to which the stamper is attached.
（作用）
固定側または可動側金型の何れか一方の鏡面部が帯磁さ
れているので、スタンパは鏡面部に吸着され、密着性が
向上する。(Function) Since the mirror surface of either the stationary mold or the movable mold is magnetized, the stamper is attracted to the mirror surface, improving adhesion.
（実施例） 以下本発明の実施例を、図面を参照しながら説明する。(Example) Embodiments of the present invention will be described below with reference to the drawings.
第１図に示すように、固定板１には、固定側金型２が取
り付けられており、また可動板３には可動側金型４が取
り付けられている。可動側金型４の底部には、鏡面仕上
げされた鏡面板５が取り付けられており、該鏡面板５沿
いには、第２図にも示すように、スタンバ６が添設され
ている。また該鏡面板５の周囲には、これを取り囲むよ
うに環状溝７が形成されており、該溝７には、可動側固
定リング８が嵌合されている。該固定リング８には、環
状の爪８ａが形成されており、スタンバ６の周縁部は、
該爪８ａによって鏡面板５に押圧固定されるようになっ
ている。鏡面板５の中央部には、該鏡面板５を貫通する
取付孔９が形成されており、該取付孔９には、先端部に
保持爪１１ａを有するホルダ１１が嵌合されている。該
ホルダ１１の先端部は、スタンバ６の中央部に形成され
た貫通孔１２から僅か突出し、保持爪１１ａは、スタン
バ６の中央部を鏡面板５に抑圧固定している。As shown in FIG. 1, a fixed mold 2 is attached to the fixed plate 1, and a movable mold 4 is attached to the movable plate 3. A mirror-finished mirror plate 5 is attached to the bottom of the movable mold 4, and a stand bar 6 is attached along the mirror plate 5, as shown in FIG. Further, an annular groove 7 is formed around the mirror plate 5 so as to surround it, and a movable side fixing ring 8 is fitted into the groove 7. The fixing ring 8 is formed with an annular claw 8a, and the peripheral edge of the stand bar 6 is
It is pressed and fixed to the mirror plate 5 by the claws 8a. A mounting hole 9 passing through the mirror plate 5 is formed in the center of the mirror plate 5, and a holder 11 having a holding claw 11a at the tip thereof is fitted into the mounting hole 9. The tip of the holder 11 slightly protrudes from a through hole 12 formed in the center of the stand bar 6, and the holding claw 11a presses and fixes the center of the stand bar 6 to the mirror plate 5.
なお、第１図およびＥｍ２図において、１２はスプルを
切断するポンチ、１３はスプルを突き出すポンチ１２の
端面から突出自在なスプルエジェクタ、１４はスプルエ
ジェクタ１３の中心を貫通し後端がポンチ１２に固定さ
れたスプル把持棒である。In Fig. 1 and Fig. Em2, 12 is a punch for cutting the sprue, 13 is a sprue ejector that can freely protrude from the end face of the punch 12 for ejecting the sprue, and 14 is a sprue ejector that penetrates through the center of the sprue ejector 13 and has a rear end attached to the punch 12. Fixed sprue gripping rod.
上記では、スタンバ６の外周を押える固定リング８が設
けられている場合について述べたが、これに限らず、第
３図に示すように固定リング８はなくともよい。In the above, a case has been described in which the fixing ring 8 that presses the outer periphery of the stand bar 6 is provided, but the present invention is not limited to this, and the fixing ring 8 may not be provided as shown in FIG. 3.
さらに本願発明において重要なことは、鏡面板５に磁性
を帯びさせたことである。磁束密度としては、スタンバ
６の取り付け、取外しまたは吸着性を考慮しての実験の
結果から、６０ガウス程度が好ましい、ということがデ
ータとして得られた。鏡面板５及びスタンバ６の材質と
しては、磁性体であれば、適宜選択し得るが、スタンバ
６の材質としては、通常Ｎｉが使用される。Furthermore, what is important in the present invention is that the mirror plate 5 is made magnetic. As for the magnetic flux density, data was obtained from the results of experiments taking into consideration the attachment, detachment, and adsorption properties of the stand bar 6, that it is preferable to set the magnetic flux density to about 60 Gauss. The materials for the mirror plate 5 and the stand bar 6 may be appropriately selected as long as they are magnetic, but the material for the stand bar 6 is usually Ni.
つぎに、スタンバ６を鏡面板５に取り付ける場合につい
て述べると、可動側固定リング８とホルダ１１とを可動
側金型４から取り外し、スタンバ６を鏡面板５に吸着さ
せ、ついでホルダ１と可動側固定リング８とをそれぞれ
取付孔９と環状溝７とに嵌合する。従来例では、ホルダ
１と可動側固定リング８とを利用してスタンバ６を取り
付ける際、あるいは成形品を突き出すことによって取り
出す際、スタンバ６と鏡面板５との間に空気が侵入し、
次サイクルでこの侵入した空気が断熱圧縮されていた。Next, to describe the case where the stand bar 6 is attached to the mirror plate 5, the movable side fixing ring 8 and the holder 11 are removed from the movable side mold 4, the stand bar 6 is adsorbed to the mirror plate 5, and then the holder 1 and the movable side The fixing ring 8 is fitted into the mounting hole 9 and the annular groove 7, respectively. In the conventional example, when attaching the stand bar 6 using the holder 1 and the movable fixing ring 8, or when taking out the molded product by protruding it, air enters between the stand bar 6 and the mirror plate 5.
In the next cycle, this intruding air was adiabatically compressed.
なお、射出後、樹脂が固化した後は、図示しない油圧シ
リンダを作動させて固定板ｌと固定側金型２とを離間さ
せることによりスプルを摩り出し、ついで図示しない油
圧シリンダによってポンチ１２を前進させスプルを切断
する。切回されたスプルは１把持棒１４に確実に把持さ
れる。After injection, after the resin has solidified, the sprue is ground out by activating a hydraulic cylinder (not shown) to separate the fixed plate l and the stationary mold 2, and then the punch 12 is moved forward by the hydraulic cylinder (not shown). Cut the sprue. The cut sprue is securely held by one gripping rod 14.
（発明の効果）
本発明は、以上から明らかなように、スタンバが添設さ
れる鏡面部に磁性を帯びさせたＣで、スタンバは鏡面部
に良好に密着することになり、このためスタンバと鏡面
部との間には空気が殆ど侵入せず、したがって従来例の
ように空気の断熱圧縮に基因する成形品への悪影響が一
切排除されることになる。(Effects of the Invention) As is clear from the above, the present invention is a C in which the mirror surface portion to which the stand bar is attached is made magnetic, so that the stand bar is in close contact with the mirror surface portion, and therefore the stand bar and the mirror surface portion are magnetized. Almost no air enters between the molded product and the mirror surface portion, so that any adverse effects on the molded product caused by adiabatic compression of air, as in the conventional example, are completely eliminated.
また、従来は、良品を得るのに何百回もの射出を行なわ
なければならなかったが、本発明によれば数回の射出で
良品が得られるため、製品の歩留りが向上するとともに
生産性も向上する。In addition, conventionally, it was necessary to perform hundreds of injections to obtain a good product, but with the present invention, a good product can be obtained with just a few injections, which improves product yield and productivity. improves.
さらに空気の断熱圧縮が生じないため、スタンバの寿命
も長くなり、したがってスタンバのコスト低減が可能と
なる。Furthermore, since adiabatic compression of air does not occur, the life of the standber is extended, and the cost of the standber can therefore be reduced.
２ ・・・ 固定側金型 ４ ・・・ 可動側金型 ５ ・・・ 鏡面板 ６ ・・・ スタンバ 第１図 第２図 第３図 2...Fixed side mold 4...Movable side mold 5... Mirror plate 6... Standby Figure 1 Figure 2 Figure 3
Claims (1)
れか一方の鏡面部を帯磁させることを特徴とする光ディ
スク金型。An optical disk mold characterized in that a mirror surface portion of either a fixed mold or a movable mold to which a stamper is attached is magnetized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17538585A JPS6235820A (en) | 1985-08-09 | 1985-08-09 | Optical disc mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17538585A JPS6235820A (en) | 1985-08-09 | 1985-08-09 | Optical disc mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6235820A true JPS6235820A (en) | 1987-02-16 |
Family
ID=15995183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17538585A Pending JPS6235820A (en) | 1985-08-09 | 1985-08-09 | Optical disc mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6235820A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01264822A (en) * | 1988-04-16 | 1989-10-23 | Daicel Chem Ind Ltd | Molding method for optical disc board containing preformat and die to be used for that |
| JPH01264818A (en) * | 1987-12-19 | 1989-10-23 | Pioneer Electron Corp | Information recording disc board and its injection molding device |
| EP0775565A1 (en) * | 1995-11-21 | 1997-05-28 | MAGNETI MARELLI S.p.A. | Mould for the injection moulding of optical parts of illumination devices for automobiles |
| CN1038914C (en) * | 1991-10-12 | 1998-07-01 | 索尼公司 | Metal mold device for molding a disc substrate and method for fabrication of disc substrate |
| AT410192B (en) * | 2000-05-17 | 2003-02-25 | Dovids Gerhard Ing | Mold for CD and DVD production by an injection molding process, comprises two halves, fitted with springs which push the halves apart when the closing force of the molding machine is released |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60245529A (en) * | 1984-05-22 | 1985-12-05 | Sumitomo Heavy Ind Ltd | Forming die for disk recording medium such as compact disk or video disk |
-
1985
- 1985-08-09 JP JP17538585A patent/JPS6235820A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60245529A (en) * | 1984-05-22 | 1985-12-05 | Sumitomo Heavy Ind Ltd | Forming die for disk recording medium such as compact disk or video disk |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01264818A (en) * | 1987-12-19 | 1989-10-23 | Pioneer Electron Corp | Information recording disc board and its injection molding device |
| JPH0671739B2 (en) * | 1987-12-19 | 1994-09-14 | パイオニア株式会社 | Information recording disk substrate injection molding machine |
| JPH01264822A (en) * | 1988-04-16 | 1989-10-23 | Daicel Chem Ind Ltd | Molding method for optical disc board containing preformat and die to be used for that |
| CN1038914C (en) * | 1991-10-12 | 1998-07-01 | 索尼公司 | Metal mold device for molding a disc substrate and method for fabrication of disc substrate |
| EP0775565A1 (en) * | 1995-11-21 | 1997-05-28 | MAGNETI MARELLI S.p.A. | Mould for the injection moulding of optical parts of illumination devices for automobiles |
| AT410192B (en) * | 2000-05-17 | 2003-02-25 | Dovids Gerhard Ing | Mold for CD and DVD production by an injection molding process, comprises two halves, fitted with springs which push the halves apart when the closing force of the molding machine is released |
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