CN1030994A - 磁毂的制造工艺 - Google Patents

磁毂的制造工艺 Download PDF

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Publication number
CN1030994A
CN1030994A CN88104725A CN88104725A CN1030994A CN 1030994 A CN1030994 A CN 1030994A CN 88104725 A CN88104725 A CN 88104725A CN 88104725 A CN88104725 A CN 88104725A CN 1030994 A CN1030994 A CN 1030994A
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Prior art keywords
sheet metal
magnetic hub
mould
magnetic
hub
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CN1014566B (zh
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美濃田武
藤堂昭
木村敏男
栗栖正吉
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Mitsui Petrochemical Industries Ltd
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Mitsui Petrochemical Industries Ltd
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Publication of CN1030994A publication Critical patent/CN1030994A/zh
Publication of CN1014566B publication Critical patent/CN1014566B/zh
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/0014—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form
    • G11B23/0021—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form discs
    • G11B23/0028—Details
    • G11B23/0035—Details means incorporated in the disc, e.g. hub, to enable its guiding, loading or driving
    • 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
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14065—Positioning or centering articles in the mould
    • 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
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S29/00—Metal working
    • Y10S29/029—Molding with other step
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49481—Wheel making
    • Y10T29/4949—Material winding, e.g., reel, spool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49906—Metal deforming with nonmetallic bonding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49982—Coating
    • Y10T29/49986—Subsequent to metal working

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)

Abstract

一种利用一磁性夹紧***将光学圆盘固定于圆 盘驱动器的轴上的、所述光学圆盘所用的磁毂的制造 工艺，包括先进行一用铁磁性物质制作的环状金属板 在模具中的定位和调整，然后往模具中注入树脂。

Description

本发明涉及一种用于光学圆盘的磁毂的制造工艺，利用一磁性夹紧***可将圆盘安装于磁毂中。
一种磁性夹紧***可用作夹紧光学圆盘的手段。图6表示一利用该种***可固定的光学圆盘的实施例。在图6中，利用一对隔圈3将一对塑料透明基片1连结在一起，并使两片记录胶片2彼此相对，磁毂从上、下表面装入轴孔。当使用光学圆盘时，将其插到圆盘驱动器的轴上，并用一磁铁将其固定于轴上。
用于安装磁毂的常用的方法中包括一种方法，其中采用的用铁磁性物质制成的、带有多根连杆5的一块环状金属板6是紧靠于塑料基片的一面上，每根连杆5***基片上的每个孔中，金属板7是压配到每根连杆的端部中，连杆从基片的另一面凸出，如图7所示（请阅日本专利特开昭No.119747/1987）。
然而，上述磁毂有这样一些缺点，即其结构复杂，制造精度高，因而比较昂贵;圆盘必须打孔以固定磁毂。所以，将磁毂安装到光学圆盘上较困难。
本发明的一个目的是提供一种用于制造结构简单且成本低廉的磁毂的工艺，其中制造金属板时不必要求过高的精度，并且使能减少制造工序，金属板能牢固装到磁毂的树脂本体中。
本发明提供一种制造磁毂的工艺，其中磁毂包括一用铁磁性物质制作的环状金属板和一树脂本体。该工艺包括先进行所述金属板在一模具中的定位与调整，然后往模具中注入树脂。
更特别是，本发明提供一种利用一磁性夹紧***将光学圆盘固定 于圆盘驱动器的轴上的、所述光学圆盘所用的磁毂的制造工艺，其特征在于所述磁毂的制作是先进行一用铁磁性物质制作的环状金属板在一模具中的定位和调整，然后再往模具中注入树脂。
图1是喷射注塑树脂前的模具的局部横剖面图;
图2是一金属板的平面图;
图3是一金属板的平面图;
图4表示了沿图3中的“A-A”剖开的经放大的横剖面图;
图5是磁毂的横剖面图;
图6是光学圆盘的横剖面图;
图7是常用磁毂的横剖面图;
下面将详细地阐述按照本发明的磁毂的制造工艺。
按照本发明的磁毂20包括一用铁磁性物质制作的环状金属板（一环状金属薄片）12和一树脂本体19，如图5所示。
可在本发明中使用的环状金属板12利用任一常用的方法均可预先制得。但是，最好是用下面方法预制金属板12，即用压力机从一大尺寸金属板上冲出来。这是因为这种在外圆及内圆上具有毛刺边13的金属板可经一道工序就制得。当具有如图4所示的、成型时产生的毛刺边13的金属板利用一***模制法承受整体模制加工时，依靠毛刺边13的紧固作用使金属板12能牢固固定于磁毂20的树脂本体19上。
金属板12的形状并不限于环形的，但是常用的是环形的。金属板12的尺寸应使它的内径或外径与磁毂20的尺寸相同，或者它的内、外径和磁毂20的内、外径相同。但是，希望使金属板12的内径略大于磁毂20的内径，而它的外径略小于磁毂20的外径，因为毛刺边13可从金属板12的内圆和外圆周朝其侧边方向凸出，所以加工内圆周和外圆周的精度为中等的，最终模制成的制品可容易地从中心销17上拉出来（见图1），所以极易脱模。金属板的厚度通常为0.1-1毫米。
例如按下述方法可进行金属板12的定位;
（1）当磁毂20的内径等于金属板12的内径时，将金属板12固定到模具中的中心销17中;
（2）当磁毂20的外径等于金属板12的外径时，将金属板12固定到模具15和16的凹槽中，所说的凹槽形成一空腔18，也就是说，利用模具15和16中的凹槽的外周边和内周边进行定位;
（3）当磁毂20的内、外径等于金属板12的内、外径时，可利用中心销17和凹槽的内周边进行定位;
（4）当金属板12的内径大于磁毂20的内径而金属板12的外径小于磁毂20的外径时，则在模具15中有多个定位销14，每根销14***到金属板12上形成的多个小孔中的每一个（用于定位）中;和
（5）将上述方法（4）和上述方法（1）-（3）中的任一个方法结合使用。
在这些方法中，方法（4）是最可取的，因为定位时不要求多么苛刻的精度，在给金属板12打孔时会形成毛刺边，以形成定位用的多个小孔。
要求在金属板12的外圆周上做出几个缺口9，如图2所示，因为金属板12能牢固固定到树脂本体19上。图3表示了一实施例，其中的金属板12上有几个小孔10是用于定位的，该板上就有数个缺口9。
可采用任一种直立模和水平模。但是，最好用直立模，因为金属板12能方便地固定而难以滑动或移动。
在用铁磁性物质制作的、厚度为0.3毫米的金属板经冲制后获得的一环形金属板12的中心部位有一轴孔11，在其圆周上有数个缺口9，在数个缺口9之间有数个用于定位的小孔10，在每个孔10和11和缺口9的圆周上形成了所述的毛刺边13，如图3所示。再按下面方式进行调整，即让诸小孔10对准模具15上的诸定位销14后，将诸销14***到 诸孔10中，并要使毛刺边13向上，如图1所示。然后，将相对的模具16合上去，用常用的方法使它们夹紧。在用附图表示的该实施例中，模具16上有一中心销17，但是，模具15也可具备中心销17。如希望的话，可使中心销17伸出模具15和16。然后，利用一注塑方法将树脂注入到空腔18中。只要可被用于注塑模制的，任一种热塑性和热固性树脂均可采用。图5表示出一利用上述的注塑模制方法获得的磁毂20。
利用诸如粘结、焊接、超声波焊接等常用方法中的任一种可将磁毂20固定到圆盘基片上。可采用一具有一固定于圆盘基片的轴上的长凸出部的磁毂。当这样的长凸出部相互紧靠并连接起来时，磁毂就能十分可靠地被固定好，这就是一个优点。
与将具有若干连杆的金属板固定到打有若干孔的圆盘基片上的方法相比，本发明具有这样的优点，即磁毂20的结构简单，金属板12的制造无需多苛刻的精度要求，磁毂20固定时不必给圆盘基片打孔，磁毂20的制造成本低。

Claims (4)

1、一种利用一磁性夹紧***将光学圆盘固定于圆盘驱动器的轴上的、所述光学圆盘所用的磁毂的制造工艺，其特征在于包括先进行用铁磁性物质制作的环状金属板在模具中的定位和调整，然后往模具中注入树脂。
2、如权利要求1所述的一种制造磁毂的工艺，其特征在于利用冲制可制得所述环状金属板，被采用的最终制得的金属板上具有成型时形成的毛刺边。
3、如权利要求1所述的一种制造磁毂的工艺，其特征在于金属板的外径小于磁毂的外径，金属板的内径大于磁毂的内径，当将模具上的诸定位销配合于在金属板上形成的、用于定位的诸小孔中时，金属板就完成了在模具中的定位。
4、如权利要求1所述的一种制造磁毂的工艺，其特征在于在金属板的圆周上要形成有若干缺口。
CN88104725A 1987-07-31 1988-07-26 磁毂的制造工艺 Expired CN1014566B (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP62193087A JPS6437740A (en) 1987-07-31 1987-07-31 Manufacture of magnetic hub
JP193087/1987 1987-07-31
JP193087/87 1987-07-31

Publications (2)

Publication Number Publication Date
CN1030994A true CN1030994A (zh) 1989-02-08
CN1014566B CN1014566B (zh) 1991-10-30

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US (1) US5020207A (zh)
EP (1) EP0301866A3 (zh)
JP (1) JPS6437740A (zh)
KR (1) KR910005105B1 (zh)
CN (1) CN1014566B (zh)

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Publication number Publication date
JPS6437740A (en) 1989-02-08
US5020207A (en) 1991-06-04
EP0301866A3 (en) 1990-02-28
CN1014566B (zh) 1991-10-30
KR910005105B1 (ko) 1991-07-22
EP0301866A2 (en) 1989-02-01
KR890002876A (ko) 1989-04-11

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