JPS57100663A - Manufacture of guide roller for magnetic tape cartridge - Google Patents

Manufacture of guide roller for magnetic tape cartridge

Info

Publication number
JPS57100663A
JPS57100663A JP17755680A JP17755680A JPS57100663A JP S57100663 A JPS57100663 A JP S57100663A JP 17755680 A JP17755680 A JP 17755680A JP 17755680 A JP17755680 A JP 17755680A JP S57100663 A JPS57100663 A JP S57100663A
Authority
JP
Japan
Prior art keywords
force
guide roller
loose piece
forces
setting
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
Application number
JP17755680A
Other languages
Japanese (ja)
Other versions
JPS6213890B2 (en
Inventor
Osamu Yamamoto
Toshimichi Uenishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maxell Holdings Ltd
Original Assignee
Hitachi Maxell Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Priority to JP17755680A priority Critical patent/JPS57100663A/en
Publication of JPS57100663A publication Critical patent/JPS57100663A/en
Publication of JPS6213890B2 publication Critical patent/JPS6213890B2/ja
Granted legal-status Critical Current

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
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/44—Removing or ejecting moulded articles for undercut articles
    • B29C45/4407—Removing or ejecting moulded articles for undercut articles by flexible movement of undercut portions of the articles
    • 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
    • G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
    • G11B23/04—Magazines; Cassettes for webs or filaments
    • G11B23/041—Details
    • G11B23/047—Guiding means

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

PURPOSE:To obtain high-precision products by setting the size of the internal circumferential surface of a loose piece so that the external diameter of a guide roller at a top circumference position on the external cylindrical surface of a cylinder part in the force is a little bit greater than that of the lower part. CONSTITUTION:Forces of basically the same structure with conventional one are used. The forces are combined and when a plastic material is injected and set, the bottom force is separated downward on the whole from the loose piece 11 and top force 12. In this case, the lower part of a cylinder part 7 has an undercut surface 15, so a formed guide roller 4 while supported by the bottom force 13 is released forcibly from the loose piece 11 and top force 12. In this process of forcible releasing, an upper collar part 5 deforms inward elastically and a part of the deformation resides unavoidably, but setting the formation internal surface of the uppe part of the release force 11 to a large diameter D'' a little bit greater than a regular size D suppresses the external diameter difference between the upper and lower parts of the running surface of the guide roller 4 low.
JP17755680A 1980-12-15 1980-12-15 Manufacture of guide roller for magnetic tape cartridge Granted JPS57100663A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17755680A JPS57100663A (en) 1980-12-15 1980-12-15 Manufacture of guide roller for magnetic tape cartridge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17755680A JPS57100663A (en) 1980-12-15 1980-12-15 Manufacture of guide roller for magnetic tape cartridge

Publications (2)

Publication Number Publication Date
JPS57100663A true JPS57100663A (en) 1982-06-22
JPS6213890B2 JPS6213890B2 (en) 1987-03-30

Family

ID=16033017

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17755680A Granted JPS57100663A (en) 1980-12-15 1980-12-15 Manufacture of guide roller for magnetic tape cartridge

Country Status (1)

Country Link
JP (1) JPS57100663A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59157804U (en) * 1983-04-08 1984-10-23 第一化成株式会社 Guide roller mold
JPH01184690A (en) * 1988-01-11 1989-07-24 Shichizun Denshi:Kk Manufacture of guide roller for magnetic tape cartridge
EP1063649A1 (en) * 1999-04-28 2000-12-27 Sony Corporation Roll for tape guide and manufacturing method therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59157804U (en) * 1983-04-08 1984-10-23 第一化成株式会社 Guide roller mold
JPH01184690A (en) * 1988-01-11 1989-07-24 Shichizun Denshi:Kk Manufacture of guide roller for magnetic tape cartridge
EP1063649A1 (en) * 1999-04-28 2000-12-27 Sony Corporation Roll for tape guide and manufacturing method therefor

Also Published As

Publication number Publication date
JPS6213890B2 (en) 1987-03-30

Similar Documents

Publication Publication Date Title
JPS56151517A (en) Embossing tool for embossing liner onto inside of crown cap shell
JPS57100663A (en) Manufacture of guide roller for magnetic tape cartridge
JPS5577941A (en) Projection extruding process on wide face of metal plate
JPS57149042A (en) Production for drum for magnetic picture recording and reproducing device
JPS56121750A (en) Manufacture of bearing and metal mold employed therefor
JPS5689536A (en) Mold for compression molding of undercut form
JPS5589940A (en) Drum for video tape recorder
JPS56165528A (en) Coining method
JPS56126114A (en) Forming method of socket for thermoplastic synthetic resin pipe
JPS546169A (en) Production of insulative pannel
JPS51119057A (en) Manufacturing method of polyvinyl alcohol molded products
JPS5675814A (en) Metal mold for shaping form in plastic
JPS5560661A (en) Vacuum type ignition timing adjusting device
JPS56137923A (en) Manufacture of inserting molding
JPS5786612A (en) Manufacture of unlubricated rod end
JPS56167917A (en) Manufacturing method for cylindrical sliding bearing
JPS5787919A (en) Hole machining method of frp leaf spring
JPS5378673A (en) Method of producing dehydration tank for dehydrator
JPS5518978A (en) Meter sealing device for electric or gas service
JPS55102703A (en) Construction of wheel and its assembly method
JPS5550932A (en) Parts staking method in production process of optical apparatus or the like
JPS53123913A (en) Magnetic head and production of the same
JPS53102865A (en) Forming method for cylindrical blank
JPS546054A (en) Method of molding synthetic resin article
JPS54143465A (en) Manufacture of molded synthetic resin article