JPH04259518A - Mold for molding disc - Google Patents
Mold for molding discInfo
- Publication number
- JPH04259518A JPH04259518A JP4265991A JP4265991A JPH04259518A JP H04259518 A JPH04259518 A JP H04259518A JP 4265991 A JP4265991 A JP 4265991A JP 4265991 A JP4265991 A JP 4265991A JP H04259518 A JPH04259518 A JP H04259518A
- Authority
- JP
- Japan
- Prior art keywords
- stamper
- mold
- holder
- mirror surface
- movable mold
- 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.)
- Granted
Links
- 238000000465 moulding Methods 0.000 title claims abstract description 22
- 230000002093 peripheral effect Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 abstract description 3
- 238000004080 punching Methods 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Manufacturing Optical Record Carriers (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、レコード盤、磁気ディ
スク、光学ディスクなどの情報記録ディスクを成形する
ためのディスク成形用金型に関し、特に多少の変形を有
するスタンパを用いてもなんら支障のないディスク成形
用金型に関する。[Industrial Application Field] The present invention relates to a disc molding mold for molding information recording discs such as vinyl records, magnetic discs, optical discs, etc., and particularly relates to a disc molding mold for molding information recording discs such as record discs, magnetic discs, optical discs, etc. In particular, the present invention relates to a mold for molding information recording discs such as record discs, magnetic discs, optical discs, etc. Regarding a mold for molding a disc.
【０００２】0002
【従来の技術】従来のディスク成形用金型は、その主要
部を図示した図３のように構成されている。図３におい
て、１は固定金型であり、その中心部にスプルブッシュ
２が設けられている。固定金型１に対向して可動金型３
が設けられ、固定金型１と可動金型３とによりキャビテ
ィ４が画成されている。可動金型３の鏡面部５上にはス
タンパ６が取り付けられており、その内周部は内周スタ
ンパホルダ７の鍔部８により、外周部は外周スタンパホ
ルダ９により微小の間隙を持って保持されている。スタ
ンパ６の外周端部を包むように環状溝が可動金型３の鏡
面部５と外周スタンパホルダ９の底面とにそれぞれ穿設
された空間１０が形成されている。更に、内周スタンパ
ホルダ７と可動金型３との嵌合部に沿ってガス逃がし溝
１１が配設され外部に連通している。同様に、空間１０
はガス逃がし溝１２によって外部に連通されている。2. Description of the Related Art A conventional disc molding die is constructed as shown in FIG. 3, which shows its main parts. In FIG. 3, 1 is a fixed mold, and a sprue bush 2 is provided in the center thereof. Movable mold 3 faces fixed mold 1
A cavity 4 is defined by a fixed mold 1 and a movable mold 3. A stamper 6 is attached to the mirror surface 5 of the movable mold 3, and its inner circumference is held by the collar part 8 of the inner stamper holder 7, and the outer circumference is held by the outer stamper holder 9 with a minute gap. has been done. A space 10 is formed in which an annular groove is formed in the mirror surface portion 5 of the movable mold 3 and the bottom surface of the outer peripheral stamper holder 9, respectively, so as to surround the outer peripheral end of the stamper 6. Further, a gas escape groove 11 is provided along the fitting portion between the inner peripheral stamper holder 7 and the movable mold 3 and communicates with the outside. Similarly, space 10
is communicated with the outside through a gas escape groove 12.
【０００３】このように構成されたディスク成形金型に
よるディスクの成形は、固定金型１と可動金型３とによ
り画成されたキャビティ４にスプルブッシュ２を通して
合成樹脂を射出充填し、キャビティ形状のディスクを成
形すると共にスタンパ６の表面に形成されたの情報信号
をディスクに転写することにより行われる。この時、キ
ャビティ４内のガスは射出された合成樹脂によってスタ
ンパ６と、内周スタンパホルダ７及び外周スタンパホル
ダ９との間隙を通りスタンパ内周縁に設けられたガス逃
がし溝１１とスタンパ外周縁の空間１０に連通されたガ
ス逃がし溝１２を介して外部に排出される。[0003] Molding of a disk using the disk molding die configured as described above involves injecting synthetic resin into a cavity 4 defined by a fixed die 1 and a movable die 3 through a sprue bushing 2, and forming the cavity shape. This is done by molding a disk and transferring the information signal formed on the surface of the stamper 6 onto the disk. At this time, the gas in the cavity 4 is caused by the injected synthetic resin to pass through the gaps between the stamper 6, the inner stamper holder 7, and the outer stamper holder 9, and between the gas relief groove 11 provided on the inner circumference of the stamper and the outer circumference of the stamper. The gas is discharged to the outside through a gas relief groove 12 that communicates with the space 10.
【０００４】上記のディスク成形用金型に使用されるス
タンパは、当然厳格な管理の元に精密に製作されるが、
例えば、図４に示すように内周上下端部ａ，ｂの面取り
仕上加工がなされていないスタンパ６や、図６に示すよ
うな打ち抜き加工時にその内外周端面ｃ，ｄにスタンパ
６の下面方向に撓むような変形を生じたスタンパ６を使
用するケースがままあった。[0004] The stamper used in the above-mentioned disk molding die is naturally manufactured precisely under strict control, but
For example, as shown in FIG. 4, the stamper 6 does not have the upper and lower inner periphery ends a, b chamfered, or the inner and outer periphery end surfaces c, d are not chamfered in the direction of the lower surface of the stamper 6 during punching as shown in FIG. There have been cases where a stamper 6 is used which has been deformed such that it is bent.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、図４に
示した面取り仕上加工がなされていないスタンパ６を図
５に示すように可動金型３の鏡面部５上にセットしよう
とすると、スタンパ６の内周上端部ａが内周スタンパホ
ルダ７のコーナ部８ａに干渉し、その結果、内周スタン
パホルダ７の鍔部８とスタンパ６との狭間１３が広くな
り、その部分に樹脂が入り込んでディスクにバリが生じ
たり、更に、入り込んだ樹脂のために、内周スタンパホ
ルダ７の下面が金型本体１４に接触できず、内周スタン
パホルダ７の全面にかかる樹脂圧力によってスタンパホ
ルダ７の鍔部８が破損するといったトラブルが発生して
いた。[Problems to be Solved by the Invention] However, when attempting to set the stamper 6 shown in FIG. 4 which has not been chamfered on the mirror surface portion 5 of the movable mold 3 as shown in FIG. The inner upper end a interferes with the corner part 8a of the inner stamper holder 7, and as a result, the gap 13 between the flange 8 of the inner stamper holder 7 and the stamper 6 becomes wider, and the resin enters into that part, causing the disc In addition, due to the resin that has entered, the lower surface of the inner stamper holder 7 cannot contact the mold body 14, and the resin pressure applied to the entire surface of the inner stamper holder 7 causes the flange of the stamper holder 7 to break. 8 was damaged.
【０００６】また、図６に示す打ち抜き加工時にその内
外周端部ｃ，ｄに変形を生じたスタンパ６を図７に示す
ように可動金型３の鏡面部５上にセットしようとすると
、内周スタンパホルダ７の鍔部８によってスタンパ６が
押え込まれて、鍔部８外側に位置するスタンパ上側表面
部分を盛り上げるとともに、スタンパ６の底面に凹部を
形成してスタンパ６と鏡面部５との間に微小の間隙６ｂ
を形成するような変形が生じる。その結果、可動金型３
の鏡面部５からスタンパ６に対する冷却に部分的にばら
つきが現れて、複屈折不良のディスクが成形される。更
に、内周スタンパホルダ７によってスタンパ６が完全に
押え込まれてしまうため、内周スタンパホルダ７の鍔部
８とスタンパ１との狭間１３が殆どなくなり、従って逃
がさなければならないガスが逃げることができず、ディ
スクに銀条やシミがついてしまうという問題が発生して
いた。Furthermore, when attempting to set the stamper 6 whose inner and outer peripheral edges c and d have been deformed during the punching process shown in FIG. 6 on the mirror surface portion 5 of the movable mold 3 as shown in FIG. The stamper 6 is pressed down by the flange 8 of the circumferential stamper holder 7, and the upper surface portion of the stamper located outside the flange 8 is raised, and a concave portion is formed on the bottom of the stamper 6 to form a recess between the stamper 6 and the mirror surface 5. A small gap 6b between
A deformation occurs that forms a . As a result, the movable mold 3
A disc with poor birefringence is formed due to local variations in cooling from the mirror surface portion 5 to the stamper 6. Furthermore, since the stamper 6 is completely pressed down by the inner stamper holder 7, the gap 13 between the flange 8 of the inner stamper holder 7 and the stamper 1 is almost eliminated, so that the gas that needs to be released is prevented from escaping. This resulted in problems such as silver streaks and stains on the disc.
【０００７】本発明の目的は、以上のような面取り仕上
加工のない内周上下端部又は変形した内外周端面を有す
るスタンパを用いてディスクを成形したとしても、なん
ら支障のないディスク成形用金型を提供することである
。An object of the present invention is to provide a disc molding tool that does not cause any problems even when a disc is molded using a stamper having upper and lower inner periphery ends without chamfering or deformed inner and outer peripheral end surfaces as described above. It is to provide a model.
【０００８】[0008]
【課題を解決するための手段】この目的を達成するため
、本発明の構成を次の通りとした。即ち、金型の鏡面部
上に中心部に内孔を有するスタンパを当接し、該スタン
パの内孔に軸部を貫通し鍔部にてスタンパを保持する内
周スタンパホルダを設け、かつ該スタンパの外周部を外
周スタンパホルダにて保持するディスク成形用金型にお
いて、前記金型の鏡面部の内周上縁部と、前記スタンパ
ホルダの鍔部底面にそれぞれ環状溝を形成したことを特
徴とする構成とした。[Means for Solving the Problems] In order to achieve this object, the present invention has the following configuration. That is, a stamper having an inner hole in the center is brought into contact with the mirror surface of the mold, an inner circumferential stamper holder is provided in the inner hole of the stamper, passing through the shaft part and holding the stamper at the flange, and A disk molding die whose outer circumferential portion is held by an outer circumferential stamper holder, characterized in that annular grooves are formed on the inner circumferential upper edge of the mirror surface portion of the die and on the bottom surface of the flange portion of the stamper holder. It was configured to do this.
【０００９】[0009]
【作用】本発明をこのような構成としたことにより、内
周上下端部の面取り仕上加工のないスタンパを可動金型
の鏡面部上にセットしたとしても内周上端部が鍔部底面
に設けられた環状溝内に逃げるので、スタンパとスタン
パホルダが干渉しあうことはない。また、打ち抜き加工
時に内外周端部に変形を生じたスタンパを可動金型の鏡
面部上にセットしたとしても、スタンパの変形分を鏡面
部上の内周上縁部とスタンパホルダの鍔部底面にそれぞ
れ設けられた環状溝に逃すことができるので、鍔部がス
タンパを完全に押え込むこともなく、よってディスクの
銀条やシミの原因となるスタンパの鍔部の外側にあたる
部分の変形を防止することができる。[Operation] By configuring the present invention as described above, even if a stamper without chamfering on the upper and lower ends of the inner periphery is set on the mirror surface of the movable mold, the upper end of the inner periphery will be placed on the bottom surface of the flange. Since the stamper and stamper holder do not interfere with each other, the stamper and stamper holder do not interfere with each other. In addition, even if a stamper whose inner and outer peripheral edges are deformed during punching is set on the mirror surface of a movable mold, the deformation of the stamper will be applied to the inner upper edge of the mirror surface and the bottom of the flange of the stamper holder. Since the stamper can escape through the annular grooves provided on each side, the flange does not completely press down on the stamper, thereby preventing deformation of the outside part of the stamper's flange, which can cause silver streaks or stains on the disc. can do.
【００１０】0010
【実施例】以下、本発明の一実施例を図１及び図２にも
とづいて説明する。なお、この実施例においては、図６
において示した打ち抜き加工時にその内外周端部に変形
を生じたスタンパを使用した場合を例にとり説明する。
また、本発明は、可動金型３及び内周スタンパホルダ７
に対する改良であるので、従来例と同一部材については
同一番号を付してその説明を省略する。Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In addition, in this example, FIG.
An example will be explained in which a stamper whose inner and outer circumferential edges are deformed during the punching process shown in 2 is used. Further, the present invention provides a movable mold 3 and an inner peripheral stamper holder 7.
Since this is an improvement over the conventional example, the same members as those in the conventional example are given the same numbers and their explanations will be omitted.
【００１１】図１において、可動金型３の鏡面部５上に
はスタンパ６が当接され、その内周部はスタンパホルダ
７の鍔部８により、外周部は外周スタンパホルダ９によ
り微小の間隙をおいて保持されている。図２においてよ
り明らかなように可動金型３の鏡面部５の底面に環状溝
１３が穿設されている。また、この下環状溝１３に面し
て、内周スタンパホルダ７の鍔部８の内周上縁部にも上
環状溝１４が穿設されている。これらの上下環状溝１３
，１４ により形成された空間にはガス逃がし溝１１が
開口し外部に連通している。In FIG. 1, a stamper 6 is brought into contact with the mirror surface portion 5 of the movable mold 3, and its inner circumferential portion is formed by a flange portion 8 of a stamper holder 7, and its outer circumferential portion is formed by an outer circumferential stamper holder 9, forming a minute gap. It is maintained at As is more clearly seen in FIG. 2, an annular groove 13 is bored in the bottom surface of the mirror surface portion 5 of the movable mold 3. Further, facing the lower annular groove 13, an upper annular groove 14 is also bored at the inner circumferential upper edge of the collar portion 8 of the inner circumferential stamper holder 7. These upper and lower annular grooves 13
, 14, a gas escape groove 11 opens and communicates with the outside.
【００１２】このような構成においてその内外周端部に
変形を生じたスタンパ６を可動金型３の鏡面部５上にセ
ットすると、スタンパ６の内周端面の変形分は、可動金
型３の鏡面部５の内周端面に設けられた下環状溝１４に
吸収され、また、外周端面の変形分は従来から形成され
ているガス逃がし用の空間１０に吸収されるので、ディ
スクの成形に何ら支障は起こらない。In such a configuration, when the stamper 6 whose inner and outer peripheral edges are deformed is set on the mirror surface portion 5 of the movable mold 3, the deformation of the inner peripheral end surface of the stamper 6 is caused by the deformation of the inner peripheral end of the movable mold 3. The deformation of the outer peripheral end surface is absorbed by the lower annular groove 14 provided on the inner peripheral end surface of the mirror surface part 5, and the deformation of the outer peripheral end surface is absorbed into the conventionally formed gas release space 10, so that no damage is caused to the molding of the disk. No problems will occur.
【００１３】また、図４において示された内周上縁部の
面取り仕上加工がなされていないスタンパ６を本発明の
金型にセットしたとしても、その内周端面部が内周スタ
ンパホルダ７の鍔部８の底面に設けられた上環状溝１３
に逃げるので内周端面部が鍔部と干渉し合うこともなく
、従ってディスクの成形に何ら支障は起こらない。Furthermore, even if the stamper 6 shown in FIG. 4 whose inner circumferential upper edge is not chamfered is set in the mold of the present invention, the inner circumferential end surface of the inner circumferential upper edge of the inner circumferential stamper holder 7 is set. Upper annular groove 13 provided on the bottom surface of the collar portion 8
Since the inner circumferential end surface part does not interfere with the flange part, there is no problem in molding the disc.
【００１４】[0014]
【発明の効果】以上の説明から明らかなように、可動金
型の鏡面部の内周上縁部とスタンパ内周端縁と当接する
スタンパホルダの鍔部底面にそれぞれ環状溝を設けたの
で、端面部の面取り仕上加工のないスタンパまたは打ち
抜き加工時に内外周部に変形の生じたスタンパを用いて
ディスク成形を行っても何ら問題は生じることはない。[Effects of the Invention] As is clear from the above description, annular grooves are provided on the upper inner edge of the mirror surface portion of the movable mold and on the bottom surface of the flange of the stamper holder that comes into contact with the inner circumferential edge of the stamper. No problem will occur even if the disc is formed using a stamper without a chamfered finish on the end face or a stamper whose inner and outer circumferential parts are deformed during punching.
【図１】本発明の一実施例のディスク成形用金型を示す
部分断面図である。FIG. 1 is a partial sectional view showing a disk molding die according to an embodiment of the present invention.
【図２】図１の要部拡大図である。FIG. 2 is an enlarged view of the main part of FIG. 1;
【図３】従来例のディスク成形用金型を示した部分断面
図である。FIG. 3 is a partial cross-sectional view showing a conventional disk molding die.
【図４】端面の面取り仕上げのないスタンパを示す断面
図である。FIG. 4 is a sectional view showing a stamper without a chamfered end face.
【図５】図４のスタンパを可動金型の鏡面部上にセット
した状態を示す従来例の断面図である。FIG. 5 is a sectional view of a conventional example showing a state in which the stamper of FIG. 4 is set on a mirror surface portion of a movable mold.
【図６】内外周部に打ち抜き変形のあるスタンパを示す
断面図である。FIG. 6 is a cross-sectional view showing a stamper with punching deformation on the inner and outer peripheral portions.
【図７】図６のスタンパを可動金型の鏡面部上にセット
した状態を示す第２の従来例を示す断面図である。FIG. 7 is a sectional view showing a second conventional example in which the stamper shown in FIG. 6 is set on a mirror surface portion of a movable mold.
３ 可動金型 ５ 鏡面部 ６ スタンパ ７ 内周スタンパホルダ ８ 鍔部 １３ 上環状溝 ２０ 下環状溝 3 Movable mold 5 Mirror surface part 6 Stamper 7 Inner stamper holder 8 Trim section 13 Upper annular groove 20 Lower annular groove
Claims (1)
るスタンパを当接し、該スタンパの内孔に軸部を貫通し
鍔部にてスタンパを保持する内周スタンパホルダを設け
、かつ該スタンパの外周部を外周スタンパホルダにて保
持するディスク成形用金型において、前記金型の鏡面部
の内周上縁部と、前記スタンパホルダの鍔部底面にそれ
ぞれ環状溝を形成したことを特徴とするディスク成形用
金型。1. A stamper having an inner hole in the center is brought into contact with the mirror surface of the mold, and an inner peripheral stamper holder is provided in the inner hole of the stamper, passing through the shaft and holding the stamper at the collar, and in a disk molding die in which the outer periphery of the stamper is held by an outer periphery stamper holder, annular grooves are formed in the inner periphery upper edge of the mirror surface part of the mold and the bottom surface of the flange part of the stamper holder. A disc molding mold featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4265991A JP2791511B2 (en) | 1991-02-14 | 1991-02-14 | Disk molding die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4265991A JP2791511B2 (en) | 1991-02-14 | 1991-02-14 | Disk molding die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04259518A true JPH04259518A (en) | 1992-09-16 |
| JP2791511B2 JP2791511B2 (en) | 1998-08-27 |
Family
ID=12642143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4265991A Expired - Fee Related JP2791511B2 (en) | 1991-02-14 | 1991-02-14 | Disk molding die |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2791511B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2000088C2 (en) * | 2006-06-07 | 2007-12-11 | Axxicon Moulds Eindhoven Bv | Stamper holder. |
| CN104465490A (en) * | 2013-09-12 | 2015-03-25 | 建宇(上海)石油科技有限公司 | Annular wire threading hole processing method of resistivity while drilling collar |
-
1991
- 1991-02-14 JP JP4265991A patent/JP2791511B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2000088C2 (en) * | 2006-06-07 | 2007-12-11 | Axxicon Moulds Eindhoven Bv | Stamper holder. |
| WO2007142526A1 (en) * | 2006-06-07 | 2007-12-13 | Axxicon Moulds Eindhoven B.V. | Stamper holder |
| CN104465490A (en) * | 2013-09-12 | 2015-03-25 | 建宇(上海)石油科技有限公司 | Annular wire threading hole processing method of resistivity while drilling collar |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2791511B2 (en) | 1998-08-27 |
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