JPH035111A - Forming method of optical memory disk hub - Google Patents
Forming method of optical memory disk hubInfo
- Publication number
- JPH035111A JPH035111A JP1141617A JP14161789A JPH035111A JP H035111 A JPH035111 A JP H035111A JP 1141617 A JP1141617 A JP 1141617A JP 14161789 A JP14161789 A JP 14161789A JP H035111 A JPH035111 A JP H035111A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic material
- hub
- optical memory
- memory disk
- injection molding
- 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 27
- 230000015654 memory Effects 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 11
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 20
- 239000000835 fiber Substances 0.000 claims abstract description 16
- 238000001746 injection moulding Methods 0.000 claims abstract description 13
- 238000000465 moulding Methods 0.000 claims description 9
- 239000006247 magnetic powder Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000000696 magnetic material Substances 0.000 abstract description 16
- 239000000843 powder Substances 0.000 abstract description 8
- 239000000203 mixture Substances 0.000 abstract description 5
- 239000002245 particle Substances 0.000 abstract description 5
- 230000004907 flux Effects 0.000 abstract description 4
- 239000002657 fibrous material Substances 0.000 abstract 2
- 229920006395 saturated elastomer Polymers 0.000 abstract 1
- 229920001169 thermoplastic Polymers 0.000 abstract 1
- 239000004416 thermosoftening plastic Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 12
- 229920005989 resin Polymers 0.000 description 10
- 239000011347 resin Substances 0.000 description 10
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- QPFMBZIOSGYJDE-UHFFFAOYSA-N 1,1,2,2-tetrachloroethane Chemical compound ClC(Cl)C(Cl)Cl QPFMBZIOSGYJDE-UHFFFAOYSA-N 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229920006122 polyamide resin Polymers 0.000 description 2
- LEOJISUPFSWNMA-UHFFFAOYSA-N ABEI Chemical compound O=C1NNC(=O)C=2C1=CC(N(CCCCN)CC)=CC=2 LEOJISUPFSWNMA-UHFFFAOYSA-N 0.000 description 1
- 229910017061 Fe Co Inorganic materials 0.000 description 1
- OWYWGLHRNBIFJP-UHFFFAOYSA-N Ipazine Chemical compound CCN(CC)C1=NC(Cl)=NC(NC(C)C)=N1 OWYWGLHRNBIFJP-UHFFFAOYSA-N 0.000 description 1
- 229910003271 Ni-Fe Inorganic materials 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 229910000796 S alloy Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004520 agglutination Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- RXKJFZQQPQGTFL-UHFFFAOYSA-N dihydroxyacetone Chemical compound OCC(=O)CO RXKJFZQQPQGTFL-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920006380 polyphenylene oxide Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005382 thermal cycling Methods 0.000 description 1
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
- Manufacturing Optical Record Carriers (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、光メモリディスクに取り付けるハブの成形方
法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of forming a hub attached to an optical memory disk.
近年、光メモリディスクハブは大容量メモリとして文書
ファイル、教育用教材、画像処理ファイル等として実用
化されている。この光メモリディスクは通常ドライブへ
のクランプを容易にするためマグネットクランプ用ハブ
が取り付けられている。ハブは直径４０＋ａ＋以下、厚
さ５肺以下の中心部に孔のある金属板、あるいは金属薄
板を接着剤や一体成形により熱可塑性樹脂に取り付けた
ものが一般的であるが、磁性体粉末を充填した樹脂材料
からなるハブも開発されている。これらのハブに要求さ
れる特性としては寸法精度の高いこと、経時変化の少な
いこと、熱膨張率が光デイスク基板に近く、環境変化に
より光デイスク基板にストレスを与えないこと、接着性
に優れること、耐摩耗性に優れることである。In recent years, optical memory disk hubs have been put into practical use as large-capacity memories for document files, educational materials, image processing files, and the like. This optical memory disk usually has a magnetic clamping hub attached to it to facilitate clamping to the drive. The hub is generally a metal plate with a hole in the center with a diameter of 40+A+ or less and a thickness of 5cm or less, or a thin metal plate attached to thermoplastic resin by adhesive or integral molding, but it is filled with magnetic powder. Hubs made of resin materials have also been developed. The characteristics required for these hubs are high dimensional accuracy, little change over time, a coefficient of thermal expansion close to that of the optical disk substrate, no stress on the optical disk substrate due to environmental changes, and excellent adhesiveness. , excellent abrasion resistance.
上記の金属製ハブあるいは金属薄板を熱可塑樹脂に取り
付けた構造のハブは、サーマルサイクルやローディング
テスト等により、熱可塑性樹脂と金属との線膨張率の違
いに起因するストレスが光デイスク基板や金属板にかか
り、熱可塑性樹脂部材や光デイスク基板にクラックやり
レーダが入りやすいことや、金属板が変形し７クランプ
用磁石との位置がずれるため吸着力が変わるなど好まし
くない面が多かった。The above-mentioned metal hub or hub with a structure in which a thin metal plate is attached to a thermoplastic resin is subjected to thermal cycling, loading tests, etc., and stress due to the difference in linear expansion coefficient between the thermoplastic resin and the metal is applied to the optical disk substrate or the metal. There were many undesirable aspects, such as the metal plate being susceptible to cracks and radar entering the thermoplastic resin member and optical disk substrate, and the metal plate being deformed and misaligned with the clamping magnet, which changed the adsorption force.
他方、熱可塑性樹脂に金属粉又は金属繊維を充填したハ
ブは、このようなことがなく経時安定性に優れているが
、磁石に対する吸着力を高めるために金属含有量を非常
に高くする必要があり、そのため成形性が悪かったり、
線膨張係数の違いが大きくなるという欠点があった。金
属含有量の低い場合にはこれらの欠点は少なくなるが、
磁石に対する吸着力が小さくなるなどの問題があった。On the other hand, a hub made of thermoplastic resin filled with metal powder or metal fibers does not have this problem and has excellent stability over time, but it requires a very high metal content to increase the attraction force to the magnet. There is, therefore, poor moldability,
There was a drawback that the difference in linear expansion coefficient became large. These drawbacks are reduced when the metal content is low, but
There were problems such as a decrease in the attraction force to the magnet.
そこで、本発明者らは、低−磁性体含有量で、より高い
磁石に対する吸着力を有する光メモリディスクハブを得
る方法について鋭意検討した結果、本発明を完成するに
到った。Therefore, the inventors of the present invention have conducted intensive studies on a method of obtaining an optical memory disk hub having a low magnetic substance content and a higher magnet attraction force, and as a result, have completed the present invention.
即ち、本発明は熱可塑性樹脂と磁性体繊維及び／又は磁
性体粉末とからなる光メモリディスクハブを射出成形し
て製造するに際し、光メモリディスクをドライブにセッ
トした際にドライブのチャッキング用磁石側に位置する
ハブ面の反対側のハブ面に射出成形用のゲートを設けた
金型を用いることを特徴とする光メモリディスクハブの
成形方法である。That is, when manufacturing an optical memory disk hub made of thermoplastic resin and magnetic fibers and/or magnetic powder by injection molding, the present invention provides a method for manufacturing an optical memory disk hub made of thermoplastic resin and magnetic fibers and/or magnetic powder. This method of molding an optical memory disk hub is characterized by using a mold having a gate for injection molding on the hub surface opposite to the hub surface on which the hub surface is located.
本発明を図面に基づいて説明する。第１図はハブ付き光
メモリディスク及びドライブのターンテーブルを示した
本発明の一実施例を、第２図は他の実施例を示すもので
ある。ドライブのターンテーブル１にはチャッキング用
磁石２と位置決め中心軸３が装着さｎている。一方、光
メモリディスク基板４には、７の位置に射出成形用のゲ
ートを設けられた金型により成形された光メモリディス
クハブ５が、チャッキング用磁石釦対するハブ面６の反
対側の面から貼付けである。The present invention will be explained based on the drawings. FIG. 1 shows one embodiment of the present invention showing an optical memory disk with a hub and a drive turntable, and FIG. 2 shows another embodiment. A chucking magnet 2 and a positioning center shaft 3 are attached to a turntable 1 of the drive. On the other hand, an optical memory disk hub 5 molded by a mold provided with an injection molding gate at position 7 is attached to the optical memory disk substrate 4 from the surface opposite to the hub surface 6 facing the chucking magnet button. It is.
本発明によれば、光メモリディスクハブ中の磁性体がチ
ャッキング用磁石に対面するハブ面側にやや多く集まり
、このため磁石に対する吸着力が増すため磁性体はより
低含有率でも効果を示すのである。即ち、ハブの射出成
形において熱可塑性樹脂の比重に比べて５倍以上もの比
重差のある磁性体がゲートから遠い面に易く集まること
を利用することにある。さらにチャッキング用磁石側に
位置するハブ面にひけなどの欠陥が出にくくなり、装飾
的にすぐれたハブが得られる利点も見出された。According to the present invention, the magnetic material in the optical memory disk hub gathers a little more on the side of the hub facing the chucking magnet, which increases the attraction force to the magnet, so that the magnetic material exhibits an effect even at a lower content. be. That is, in injection molding of the hub, the purpose is to take advantage of the fact that magnetic material, which has a specific gravity that is five times or more higher than that of the thermoplastic resin, easily gathers on the surface far from the gate. Furthermore, it has been found that defects such as sink marks are less likely to appear on the hub surface located on the chucking magnet side, and a hub with excellent decoration can be obtained.
本発明に用いる熱可塑性樹脂としては、ポリエステル樹
脂、ポリアミド樹脂、ＡＢＥＩ樹脂、ポリカーボネート
樹脂、ポリフェニレンオキサイド樹脂、ポリアセタール
樹脂、ポリフェニレンスルフィド樹脂、ポリスルホン樹
脂、ポリエーテルスルホン樹脂、ポリアミド樹脂等が挙
げられる。Examples of thermoplastic resins used in the present invention include polyester resins, polyamide resins, ABEI resins, polycarbonate resins, polyphenylene oxide resins, polyacetal resins, polyphenylene sulfide resins, polysulfone resins, polyethersulfone resins, and polyamide resins.
本発明に用いる磁性体粉末又は磁性体繊維は残留磁束密
度が低く、飽和磁束密度の高いものが好ましい。これら
の例として純度９８重量係以上のｐｅ、Ｓｉを１〜４重
量係含む５ｉ−Ｆｅ合金、Ａ４−Ｆｅ合金、Ｎｉ−Ｆｅ
合金、Ｎｉ−Ｆｅ−Ｃｏ合金、又はＮｉ、 Ｆｅ、 Ｃ
ｏの一種又は二種以上を８０重量壬含み且つＯｒ＋ Ｍ
ｎ、 Ｗ等を含む合金例えばＪ工Ｓに定められているＳ
Ｕ８４００番代の合金を使用することができる。The magnetic powder or magnetic fiber used in the present invention preferably has a low residual magnetic flux density and a high saturation magnetic flux density. Examples of these include pe with a purity of 98% by weight or higher, 5i-Fe alloy containing 1 to 4% Si by weight, A4-Fe alloy, Ni-Fe
alloy, Ni-Fe-Co alloy, or Ni, Fe, C
Contains 80 gm of one or more of o and Or + M
Alloys containing n, W, etc. For example, S specified in J Engineering S
Alloys in the U8400 series can be used.
磁性体粉末の重量平均粒径は［１００１〜０．３陶であ
ることが好ましく、０．３ ｍｓｍを越えると熱可塑性
樹脂と混合したり、射出成形の際スクリューとバレルと
の間で摩擦が大きくなり、スクリューやバレルが損傷し
やすいため好ましくな−。他方、０．００１ ｍ未満で
あると熱可塑性樹脂との混合操作が難しくなるとともに
混合物の飽和磁束密度が低くなるため同様に好ましくな
い。The weight average particle size of the magnetic powder is preferably 1001 to 0.3 ms. If it exceeds 0.3 msm, it may mix with the thermoplastic resin or cause friction between the screw and barrel during injection molding. This is not desirable because it becomes large and the screw and barrel are easily damaged. On the other hand, if it is less than 0.001 m, the mixing operation with the thermoplastic resin becomes difficult and the saturation magnetic flux density of the mixture becomes low, which is also not preferable.
磁性体繊維の平均繊維長は１０咽以下であることが望ま
しく、ＩＤｗを越えると熱可塑性樹脂と混合したり、射
出成形の際スクリューやバレルを痛めやすいため好まし
くない。また繊維径は０．００２〜０．２ ｍが好まし
い。［１００２ｍ未満であると繊維の塊ができやすくな
り熱可塑性樹脂との混合操作が難しくなるとともに、ハ
ブ成形品の磁石に対する吸着力が弱くなる。他方１２ｍ
ｍを越えると混合樹脂の成形性が悪く々ることか起こり
易い。It is desirable that the average fiber length of the magnetic fibers is 10 mm or less; if it exceeds IDw, it is not preferable because it tends to mix with the thermoplastic resin or damage the screw or barrel during injection molding. Moreover, the fiber diameter is preferably 0.002 to 0.2 m. [If the length is less than 1002 m, fiber clumps are likely to form, making it difficult to mix with the thermoplastic resin, and the adsorption force of the hub molded product to the magnet becomes weak. The other 12m
If it exceeds m, the moldability of the mixed resin tends to deteriorate.
熱可塑性樹脂と磁性体との混合比率は得られる光メモリ
ディスクハブの磁性的性質と信頼性及び成形性とから決
められ、磁性体繊維及び磁性体粉末の混合比率は、ハブ
の全重量中３５〜９３５〜９３重量部好ましくけ６０〜
８７０〜８７重量部３５重量係以下であると光メモリデ
ィスクをマグネットクランプするに要する吸着力が得ら
れないため、好寸しくない。他方、９３３重量部越える
と押出し作業性や射出成形性が著しく損なわれることと
、熱可塑性樹脂と磁性体との混合が不十分になり強度が
小さく、僅かな衝撃にも割れるようになり、信頼性が」
口なわれるため好ましくない。The mixing ratio of the thermoplastic resin and the magnetic material is determined based on the magnetic properties, reliability, and moldability of the resulting optical memory disk hub, and the mixing ratio of the magnetic fiber and the magnetic powder is 35 to 35% of the total weight of the hub. 935-93 parts by weight preferably 60-93 parts by weight
If it is less than 870 to 87 parts by weight or 35 parts by weight, it is not suitable because the suction force required to magnetically clamp the optical memory disk cannot be obtained. On the other hand, if it exceeds 933 parts by weight, extrusion workability and injection moldability will be significantly impaired, and the mixing of the thermoplastic resin and the magnetic material will be insufficient, resulting in low strength and cracking at the slightest impact, resulting in poor reliability. Gender”
I don't like it because I get criticized.
熱可塑性樹脂と磁性体繊維又は磁性体粉末を混合する装
置としては、通常用いられている装置、例えばヘンシェ
ルミキサー ミキシングロル、−軸押出機、二軸押出機
等を用いることができる。混合に際して、熱可塑性樹脂
は平均粒径１．５問以下、好渣しくけ１． Ｏｔａｎ以
下の粉末状として供給することで、良好な混合操作を行
なうことができる。As a device for mixing the thermoplastic resin and the magnetic fiber or magnetic powder, a commonly used device such as a Henschel mixer mixing roll, a -screw extruder, a twin-screw extruder, etc. can be used. When mixing, the thermoplastic resin should have an average particle size of 1.5 or less and a good agglutination ratio of 1. A good mixing operation can be performed by supplying the powder in the form of powder of less than Otan.
本発明の光メモリディスクハブは、通常の射出成形機に
より成形できるが、成形機内の溶融樹脂の長時間滞留を
避けるため、射出量は成形機の射出容量の１５〜６０係
程度が好ましい。The optical memory disk hub of the present invention can be molded using an ordinary injection molding machine, but in order to avoid long-term retention of molten resin in the molding machine, the injection amount is preferably about 15 to 60 times the injection capacity of the molding machine.
射出成形条件としては、原料として用いた熱可塑性樹脂
の通常の成形条件より１０〜２０℃高い設定温度、５０
〜１００に９／ｃｒｎ２高（へ射出圧力、高めの射出速
度に設定した方が、磁性体がクランプされる側により集
まり易く、吸着力の良好なハブが得られる。また、表面
のつややヒケの点からも好ましい結果が得られる。The injection molding conditions include a set temperature of 10 to 20°C higher than the normal molding conditions of the thermoplastic resin used as a raw material, and a temperature of 50°C.
~100 to 9/crn2 high (injection pressure and injection speed set to high) will make it easier for the magnetic material to gather on the side to be clamped, resulting in a hub with good adsorption force. Favorable results can also be obtained from this point of view.
本発明に用いる金型はピンゲートあるいはリング状ゲー
トが好適であり、コールドランナ方式だけでなくホット
ランナ−による方法も側御ることができる。ピンゲート
の場合、３点以上のゲート数が寸法精度の点から好まし
く、さらにゲート径は通常ａ３〜２０問が用いられ、ラ
ンド長さは２間以下が好ましい。The mold used in the present invention is preferably a pin gate or a ring gate, and can be applied not only to a cold runner method but also to a hot runner method. In the case of pin gates, the number of gates is preferably three or more from the viewpoint of dimensional accuracy, and the gate diameter is usually from A3 to A20, and the land length is preferably 2 or less.
さらに本発明の方法はハブ外周に透明樹脂等を一体とし
て成形することのできる２色成形にも応用することがで
きる。Furthermore, the method of the present invention can be applied to two-color molding in which a transparent resin or the like can be integrally molded on the outer periphery of the hub.
以下、実施例により本発明の詳細な説明する。 Hereinafter, the present invention will be explained in detail with reference to Examples.
実施例１
平均粒径１００ ｐｍのＳＵＳ ４３０粉末７５重量部
、平均繊維径２０μｍ、平均繊維長 １５咽ノｓ ｕ
Ｓ ４ ｓ ｏｌｆｉ維ｓ重葉部、フェノールとテトラ
クロルエタンの５０７５０溶液で測定した極限粘度が０
．８５であり、平均粒径が０４駒のポリブチレンテレフ
タレート粉末２０ ’ｆｉｒ 置部、カーボンブラック
０．３重量部、酸化防止剤とし７てＢ−２２０（チバガ
イギー社製） ０．２ Ｎ置部を混合し、二軸押出機で
押出して得たベレットを成形した。金型はドライブのチ
ャッキング用磁石側となるハブ面の対面にゲート径ｔ
Ｏｒａｎφ、ランド長さ１．２ ｒｍの３点ゲートを設
けた３枚割り型であり、得られたハブ成形品は磁石に対
し十分な吸着力である０８ゆを示し、且つチャッキング
用磁石側となるハブ面にひけのない外観に優れたもので
あった。Example 1 75 parts by weight of SUS 430 powder with an average particle diameter of 100 pm, an average fiber diameter of 20 μm, and an average fiber length of 15 mm.
The intrinsic viscosity measured with a 50750 solution of phenol and tetrachloroethane is 0.
．． 85 and an average particle size of 04 pieces, 0.3 parts by weight of carbon black, and 0.2 N of B-220 (manufactured by Ciba Geigy) as an antioxidant were mixed. Then, a pellet obtained by extrusion using a twin-screw extruder was molded. The mold has a gate diameter t on the opposite side of the hub surface that is the chucking magnet side of the drive.
It is a three-piece type with a three-point gate with a land length of 1.2 rm, and the obtained hub molded product exhibits 08 mm, which is a sufficient adsorption force for the magnet, and the chucking magnet side The hub surface had an excellent appearance with no blemishes.
比較例１
比較としてチャッキング用磁石側となるハブ面に実施例
と同形状の３点ゲートを設けた金型を用いて同条件で成
形すると磁石に対する吸着力は０．７ ｋｇと小さくな
り、さらにチャッキング用磁石側となるハブ面にひけが
目立ち外観の悪いハブが得られた。Comparative Example 1 For comparison, when molding under the same conditions using a mold with a three-point gate of the same shape as in the example on the hub surface facing the chucking magnet, the attraction force against the magnet was as small as 0.7 kg. Furthermore, the hub surface facing the chucking magnet had noticeable sink marks, resulting in a hub with poor appearance.
本発明によれば、特定組成の材料を用い、特殊な成形方
法を採用することにより、効果的に磁石に対する吸着性
に優れ、かつ外観の良好な光メモリディスクハブを製造
することができるため、工業上優れた効果を奏する。According to the present invention, by using a material with a specific composition and a special molding method, it is possible to effectively manufacture an optical memory disk hub that has excellent adhesion to magnets and has a good appearance. It has excellent effects.
第１図はハブ付き光メモリディスク及びドライブのター
ンテ
プルを示した本発明の一実施
例を、
＃、２図は他の実施例を示すものである。FIG. 1 shows one embodiment of the present invention showing an optical memory disk with a hub and a turntable of a drive, and FIG. 2 shows another embodiment.
Claims (1)
なる光メモリディスクハブを射出成形して製造するに際
し、光メモリディスクをドライブにセットした際にドラ
イブのチャッキング用磁石側に位置するハブ面の反対側
のハブ面に射出成形用のゲートを設けた金型を用いるこ
とを特徴とする光メモリディスクハブの成形方法。When manufacturing an optical memory disk hub made of thermoplastic resin and magnetic fibers and/or magnetic powder by injection molding, when the optical memory disk is set in the drive, the surface of the hub located on the chucking magnet side of the drive. A method for molding an optical memory disk hub, characterized by using a mold having an injection molding gate on the opposite hub surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1141617A JP2747925B2 (en) | 1989-06-02 | 1989-06-02 | Method of forming optical memory disk hub |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1141617A JP2747925B2 (en) | 1989-06-02 | 1989-06-02 | Method of forming optical memory disk hub |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH035111A true JPH035111A (en) | 1991-01-10 |
| JP2747925B2 JP2747925B2 (en) | 1998-05-06 |
Family
ID=15296205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1141617A Expired - Fee Related JP2747925B2 (en) | 1989-06-02 | 1989-06-02 | Method of forming optical memory disk hub |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2747925B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2264193A (en) * | 1992-02-07 | 1993-08-18 | Basf Magnetics Gmbh | Recording disk having a moulded hub. |
| EP0566032A2 (en) * | 1992-04-13 | 1993-10-20 | Matsushita Electric Industrial Co., Ltd. | Hub type optical disk and injection molding die for molding its disk substrate |
| US5536456A (en) * | 1990-12-28 | 1996-07-16 | Tdk Corporation | Optical disc and method for making |
| WO2002089137A1 (en) * | 2001-04-23 | 2002-11-07 | Matsushita Electric Industrial Co., Ltd. | Optical information recording medium and optical information recording/reproduction apparatus |
| JP2010114731A (en) * | 2008-11-07 | 2010-05-20 | Toshiba Corp | Method for manufacturing camera module |
-
1989
- 1989-06-02 JP JP1141617A patent/JP2747925B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5536456A (en) * | 1990-12-28 | 1996-07-16 | Tdk Corporation | Optical disc and method for making |
| GB2264193A (en) * | 1992-02-07 | 1993-08-18 | Basf Magnetics Gmbh | Recording disk having a moulded hub. |
| EP0566032A2 (en) * | 1992-04-13 | 1993-10-20 | Matsushita Electric Industrial Co., Ltd. | Hub type optical disk and injection molding die for molding its disk substrate |
| EP0566032A3 (en) * | 1992-04-13 | 1994-08-24 | Matsushita Electric Ind Co Ltd | Hub type optical disk and injection molding die for molding its disk substrate |
| WO2002089137A1 (en) * | 2001-04-23 | 2002-11-07 | Matsushita Electric Industrial Co., Ltd. | Optical information recording medium and optical information recording/reproduction apparatus |
| US6941572B2 (en) | 2001-04-23 | 2005-09-06 | Matsushita Electric Industrial Co., Ltd. | Optical information recording medium and optical information recording/reproduction apparatus |
| JP2010114731A (en) * | 2008-11-07 | 2010-05-20 | Toshiba Corp | Method for manufacturing camera module |
| US8098284B2 (en) | 2008-11-07 | 2012-01-17 | Kabushiki Kaisha Toshiba | Method of manufacturing camera module |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2747925B2 (en) | 1998-05-06 |
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