JPH01258924A - Method of manufacturing optical disc - Google Patents
Method of manufacturing optical discInfo
- Publication number
- JPH01258924A JPH01258924A JP8631388A JP8631388A JPH01258924A JP H01258924 A JPH01258924 A JP H01258924A JP 8631388 A JP8631388 A JP 8631388A JP 8631388 A JP8631388 A JP 8631388A JP H01258924 A JPH01258924 A JP H01258924A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- runner
- gate
- cut
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 239000000758 substrate Substances 0.000 claims abstract description 57
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000005520 cutting process Methods 0.000 claims abstract description 14
- 238000001746 injection moulding Methods 0.000 claims abstract description 9
- 230000001681 protective effect Effects 0.000 claims description 20
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 238000000465 moulding Methods 0.000 abstract description 10
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007738 vacuum evaporation Methods 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
- B29C45/38—Cutting-off equipment for sprues or ingates
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2017/00—Carriers for sound or information
- B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
- B29L2017/003—Records or discs
- B29L2017/005—CD''s, DVD''s
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
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、光ディスクの製造方法に関するものである
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing an optical disc.
従来、光ディスクのディスク基板の射出成形には基板成
形中どこかの工程で中央穴の加工が必要であり、その穴
加工は第7図〜第9図に示す如くディスク基板の射出完
了後金型内にある内に行うか、或いはディスク基板の射
出完了後金型外に取り出して基板保護膜形成工程までに
行っていた。これは、ディスク基板射出成形工程の次工
程が基板保護膜の形成であるため、第10図〜第12図
に示す如く中央穴を加工せずにおくと、スプルー等が大
きなスペースを占め、基板保護膜の成形特邪魔となり、
著しく生産性を落とすからである。Conventionally, injection molding of disk substrates for optical disks requires machining of a center hole at some stage during the substrate molding process, and the hole machining is performed after injection of the disk substrate is completed, as shown in FIGS. 7 to 9. Either the process is carried out while the disk substrate is still in the mold, or it is taken out of the mold after the injection of the disk substrate is completed and the process is carried out before the process of forming the substrate protective film. This is because the next step after the disk substrate injection molding process is the formation of a substrate protective film, so if the center hole is left unprocessed as shown in Figures 10 to 12, the sprue etc. will occupy a large space and the substrate will It becomes a special hindrance to the formation of the protective film.
This is because productivity will drop significantly.
しかしながら、穴加工を射出完了後金型内で。 However, the hole machining is done in the mold after the injection is completed.
行うと、第9図に示す如く穴加工時パリや切屑が基板保
護膜形成前のディスク基板に付着し易く、付着物により
金属保護膜の性能が著しく低下する。また、金型内で穴
加工を行った場合、第13図に示す如く金型の成形面に
切屑が付着し、次サイクルのショットで成形されるディ
スク基板に成形不良が発生するという不都合を免れない
。If this is done, as shown in FIG. 9, during hole drilling, particles and chips tend to adhere to the disk substrate before the substrate protective film is formed, and the performance of the metal protective film is significantly degraded by the deposits. In addition, when drilling a hole in a mold, as shown in Figure 13, it is possible to avoid the inconvenience of chips adhering to the molding surface of the mold and causing molding defects in the disk substrate molded in the next shot cycle. do not have.
本発明は、前記課題を解決するためになされたもので、
基板保護膜形成工程前にディスク基板に切屑が付着する
のを防止し、品質の良いディスク基板を得ることを目的
とする。The present invention has been made to solve the above problems,
The purpose is to prevent chips from adhering to a disk substrate before a step of forming a substrate protective film, and to obtain a disk substrate of good quality.
本発明の光デイスク製造方法は、ディスク状キャビティ
に樹脂を射出成形した後、スプルー・ランナーを切り離
してディスク基板の中央穴を形成する光ディスクの製造
方法において、前記ランナーとキャビティを連通ずるゲ
ートの切断前に、スプルー・ランナーの一部を切断除去
し、次いで基板保護膜の形成を行った後、ゲートを切断
しランナーの切り離しを行うことを特徴とする。The optical disc manufacturing method of the present invention includes injection molding a resin into a disc-shaped cavity, and then cutting off a sprue runner to form a central hole in a disc substrate. The method is characterized in that a part of the sprue runner is first cut and removed, then a substrate protective film is formed, and then the gate is cut and the runner is separated.
〔実 施 例〕
先ず、本発明方法実施用装置の一例を第1図及び第2図
に沿い説明する。[Example] First, an example of an apparatus for implementing the method of the present invention will be described with reference to FIGS. 1 and 2.
第1図中1は基板保護膜形成装置、2はゲート切断装置
、3はトレイ洗浄装置、4は前記基板保護膜形成装置1
とゲート切断装置2とトレイ洗浄装置3に順次トレイ5
を搬送する閉ループのトレイ搬送装置である。6は射出
成形機で、ディスク基板7を射出成形し、射出完了後酸
ディスク基板7と共に成形されたスプルー・ランナー2
8の一部28aを除去する。8はロボット等の成形品移
載装置で、射出成形機6がらスプルー・ランナー28の
一部28aを除去した後のディスク基板7を取り出して
トレイ搬送装置4における基板保護膜形成装置1の入口
側に供給する。9はロボット等の製品取出し装置で、基
板保護膜30を形成し、かつ、ゲート50を切断し残留
ランナー28bを除去したディスク基板7を取り出すた
めに設けられている。In FIG. 1, 1 is a substrate protective film forming device, 2 is a gate cutting device, 3 is a tray cleaning device, and 4 is the substrate protective film forming device 1.
Then, the tray 5 is sequentially transferred to the gate cutting device 2 and the tray cleaning device 3.
This is a closed-loop tray conveying device that conveys. 6 is an injection molding machine which injection molds the disk substrate 7, and after the injection is completed, the sprue runner 2 is molded together with the acid disk substrate 7.
Part 28a of 8 is removed. Reference numeral 8 denotes a molded product transfer device such as a robot, which takes out the disk substrate 7 after removing a portion 28a of the sprue runner 28 from the injection molding machine 6 and transfers it to the tray conveyance device 4 on the inlet side of the substrate protective film forming device 1. supply to. Reference numeral 9 denotes a product take-out device such as a robot, which is provided to take out the disk substrate 7 on which the substrate protection film 30 has been formed, the gate 50 has been cut, and the remaining runners 28b have been removed.
基板保護膜形成装置1は真空蒸着装置であるA1.スパ
ッター装置等であり、トレイ搬送方向に視て真空予備室
10をスパッター室11の前後に連設し、該スパッター
室11内において基板保護膜のAi、膜をディスク基板
7上に形成する。The substrate protective film forming apparatus 1 is a vacuum evaporation apparatus A1. This is a sputtering device or the like, and a vacuum preparatory chamber 10 is installed in front and behind a sputtering chamber 11 when viewed in the tray transport direction, and a substrate protective film Ai is formed on the disk substrate 7 in the sputtering chamber 11.
前記射出成形機6の金型装置を第2図に沿い説明すると
、図中12は固定側金型で、固定プラテン13に取付板
14を介して装着されている。15はスプルーブツシュ
で、取付板14内に摺動可能に嵌入され、かつ、固定プ
ラテン13側にスプリング16を介して弾発支持されて
いる。このスプルーブツシュ15は、前記固定側金型1
2の中央に穿設した貫通穴17に摺動可能に嵌合してい
る。1日は可動側金型で、可動プラテン19に取付板2
0を介して装着されている。21はパンチで、ピストン
22に装着され、かつ前記可動側金型18の中央に穿設
した貫通穴23に摺動可能に嵌合している。The mold device of the injection molding machine 6 will be described with reference to FIG. 2. In the figure, reference numeral 12 denotes a stationary side mold, which is attached to a stationary platen 13 via a mounting plate 14. A sprue bush 15 is slidably fitted into the mounting plate 14 and resiliently supported on the fixed platen 13 side via a spring 16. This sprue bush 15 is attached to the fixed side mold 1.
It is slidably fitted into a through hole 17 bored in the center of 2. On the 1st, on the movable side mold, attach the mounting plate 2 to the movable platen 19.
It is attached via 0. A punch 21 is attached to the piston 22 and is slidably fitted into a through hole 23 formed in the center of the movable mold 18.
24は環状のキャビティで、図示しない型締装置によっ
て型締した固定側金型12と可動側金型18から形成さ
れる。このキャビティ24で囲まれる基板中心穴成形部
の中央部に前記スプルーブツシュ15及びパンチ21が
配置されて互いに対向している。25はエジェクタビン
で、前記スプルーブツシュ15とパンチ21に摺動可能
に嵌入されており、スプリング26によって戻り力を付
勢されている。27は可塑化装置のノズルである。Reference numeral 24 denotes an annular cavity, which is formed from the fixed side mold 12 and the movable side mold 18, which are clamped by a mold clamping device (not shown). The sprue bush 15 and the punch 21 are arranged in the center of the substrate center hole molding portion surrounded by the cavity 24, and are opposed to each other. Reference numeral 25 denotes an ejector bin, which is slidably fitted into the sprue bush 15 and punch 21, and is biased with a return force by a spring 26. 27 is a nozzle of a plasticizing device.
以上のような装置を使用して本発明を実施する場合、次
の工程による。When carrying out the present invention using the above-mentioned apparatus, the following steps are performed.
(1) 固定側金型12と可動側金型16を型締して
形成したキャビティ24にノズル27がらスプルー・ラ
ンナー28及びゲー1−50を経て溶融樹脂を射出し保
圧・冷却を行って光ディスクのディスク基板7を成形す
る(第3図参照)。(1) Molten resin is injected through a nozzle 27 through a sprue runner 28 and a gage 1-50 into a cavity 24 formed by clamping the fixed mold 12 and the movable mold 16, and is kept under pressure and cooled. The disk substrate 7 of the optical disk is molded (see FIG. 3).
(2)型締力を保持した状態でノズル27を後退させる
と、スプルーブツシュ15はスプリング16の力のみに
よって第2図左半分に示す位置で静止している。次いで
、取付板2oに内蔵したシリンダ29によりピストン2
2を介してパンチ21を上昇させると、第2図右手分に
示す如くパンチ21とスプルーブツシュ15及びこれら
に挟持された樹脂部分は一体的にスプルーブツシュ15
を押すスプリング力に打ち勝って移動し、パンチ21の
上端が固定側金型12の貫通穴17の内周エツジ部に達
した時、ゲート50から離れた位置にあるスプルー・ラ
ンナーの一部28aが切断除去される(第4図参照)。(2) When the nozzle 27 is moved backward while the mold clamping force is maintained, the sprue bush 15 remains stationary at the position shown in the left half of FIG. 2 only by the force of the spring 16. Next, the piston 2 is moved by the cylinder 29 built into the mounting plate 2o.
2, the punch 21, the sprue bush 15, and the resin portion sandwiched therebetween are integrated into the sprue bush 15, as shown in the right hand side of FIG.
When the upper end of the punch 21 reaches the inner peripheral edge of the through hole 17 of the stationary mold 12, the part 28a of the sprue runner located away from the gate 50 moves. It is cut and removed (see Figure 4).
尚、後工程のゲートカットで切屑の発生を防止するため
に、ゲート50がキャビティの内周面軸方向端部に臨む
よう予備ゲートカットを同時に行っておくことが好まし
い。In order to prevent the generation of chips during gate cutting in the subsequent process, it is preferable to perform preliminary gate cutting at the same time so that the gate 50 faces the axial end of the inner circumferential surface of the cavity.
(3) スプルー・ランナー28の一部28aの切断
除去後、型締力を解除して型開を行い、ディスク基板7
を取り出す。このディスク基板7を成形品取出し装置8
によりトレイに移載しトレイ搬送装置4によって基板保
護膜形成装置1に送り込んでディスク基板7上に基板保
護膜CAR膜)30を形成する(第5図参照)。(3) After cutting and removing the part 28a of the sprue runner 28, the mold clamping force is released and the mold is opened, and the disk substrate 7 is removed.
Take out. This disk substrate 7 is removed by a molded product take-out device 8.
The disk substrate 7 is transferred to a tray and fed into the substrate protective film forming apparatus 1 by the tray transport device 4 to form a substrate protective film CAR film 30 on the disk substrate 7 (see FIG. 5).
(4)ゲート切断袋W2によるゲートカットによってデ
ィスク基板7から残留ランナー28bを切り離し除去す
る(第6図参照)。このディスク基板7はトレイ5上か
ら製品取出し装置9によって取り出される。また、トレ
イ5はディスク基板7の取り出し後トレイ洗浄装置3に
よってその表面から付着した/l膜を除去され、循環再
使用される。(4) Cut and remove the remaining runner 28b from the disk substrate 7 by gate cutting using the gate cutting bag W2 (see FIG. 6). This disk substrate 7 is taken out from the tray 5 by a product take-out device 9. Further, after the disk substrate 7 is removed from the tray 5, the /l film adhering to its surface is removed by the tray cleaning device 3, and the tray 5 is recycled and reused.
以上の通り本発明は、ディスク基板の保護膜形成前にス
プルー・ランナーの一部を切断除去するため、基板保護
膜の形成をスプルーに邪魔されずに容易に行うことがで
きる。また、スプルー・ランナーの一部をゲートから離
れた位置で切断除去するため、切屑がディスク基板の表
面及び金型の成形面に付着することがない。As described above, the present invention cuts and removes a portion of the sprue runner before forming the protective film on the disk substrate, so that the substrate protective film can be easily formed without being hindered by the sprue. Furthermore, since a portion of the sprue runner is cut and removed at a position away from the gate, chips will not adhere to the surface of the disk substrate or the molding surface of the mold.
従って、品質の良い光ディスクを生産性よく製造するこ
とができる。Therefore, high-quality optical discs can be manufactured with high productivity.
第1図は本発明実施用装置の概要を示す平面図、第2図
は同装置における射出成形機の要部を示す断面図、第3
図、第4図、第5図、第6図は本発明方法の工程図、第
7図、第8図、第9図は従来例の工程図で、第9図は切
屑が金属保護膜に与える悪影響を示す。第10図、第1
1図、第12図は他の従来例の工程図、第13図は第9
図に対応して切屑がディスク基板の成形に与える悪影響
を示す概要図である。
7・・・ディスク基板、28・・・スプルー・ランナー
、30・・・基板保護膜、50・・・ゲート。
第1図
第3図 第4図
予備ゲートナンド
(成形) (ユブヤーカ
、ト)第7図
第10図
(成形)
第5図 第6図
(保護膜形成) (ゲートカット)第
8図 第9図
第11図 第12図FIG. 1 is a plan view showing an overview of the apparatus for implementing the present invention, FIG. 2 is a sectional view showing the main parts of the injection molding machine in the same apparatus, and FIG.
4, 5, and 6 are process diagrams of the method of the present invention, and Figures 7, 8, and 9 are process diagrams of the conventional method. Indicates the negative impact it has. Figure 10, 1st
Figures 1 and 12 are process diagrams of other conventional examples, and Figure 13 is the process diagram of the 9th example.
FIG. 2 is a schematic diagram showing the adverse effect that chips have on the molding of a disk substrate, corresponding to the figure; 7... Disk substrate, 28... Sprue runner, 30... Substrate protective film, 50... Gate. Figure 1 Figure 3 Figure 4 Preliminary gate (molding) Figure 7 Figure 10 (molding) Figure 5 Figure 6 (protective film formation) (Gate cutting) Figure 8 Figure 9 Figure 11 Figure 12
Claims (2)
スプルー・ランナーを切り離してディスク基板の中央穴
を形成する光ディスクの製造方法において、前記ランナ
ーとキャビティを連通するゲートの切断前に、スプルー
・ランナーの一部を切断除去し、次いで基板保護膜の形
成を行った後、ゲートを切断しランナーの切り離しを行
うことを特徴とする光ディスクの製造方法。(1) After injection molding the resin into the disc-shaped cavity,
In an optical disk manufacturing method in which a sprue runner is cut off to form a center hole in a disk substrate, a part of the sprue runner is cut and removed before cutting a gate communicating between the runner and the cavity, and then a substrate protective film is formed. A method for manufacturing an optical disc, which comprises: cutting the gate and separating the runner after performing the above steps.
周面の軸方向端部に臨むよう予備切断しておくことを特
徴とする特許請求の範囲第1項記載の光ディスクの製造
方法。(2) The method for manufacturing an optical disk according to claim 1, wherein the substrate is pre-cut so that the gate faces the axial end of the inner circumferential surface of the cavity before forming the substrate protective film.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8631388A JP2592092B2 (en) | 1988-04-08 | 1988-04-08 | Optical disc manufacturing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8631388A JP2592092B2 (en) | 1988-04-08 | 1988-04-08 | Optical disc manufacturing method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH01258924A true JPH01258924A (en) | 1989-10-16 |
JP2592092B2 JP2592092B2 (en) | 1997-03-19 |
Family
ID=13883346
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8631388A Expired - Lifetime JP2592092B2 (en) | 1988-04-08 | 1988-04-08 | Optical disc manufacturing method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2592092B2 (en) |
-
1988
- 1988-04-08 JP JP8631388A patent/JP2592092B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP2592092B2 (en) | 1997-03-19 |
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