JPS56166034A - Method of production of housing case - Google Patents

Method of production of housing case

Info

Publication number
JPS56166034A
JPS56166034A JP6954080A JP6954080A JPS56166034A JP S56166034 A JPS56166034 A JP S56166034A JP 6954080 A JP6954080 A JP 6954080A JP 6954080 A JP6954080 A JP 6954080A JP S56166034 A JPS56166034 A JP S56166034A
Authority
JP
Japan
Prior art keywords
mold
bearing
molds
slidable
vertical groove
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.)
Pending
Application number
JP6954080A
Other languages
Japanese (ja)
Inventor
Shinichi Kagano
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 JP6954080A priority Critical patent/JPS56166034A/en
Publication of JPS56166034A publication Critical patent/JPS56166034A/en
Pending legal-status Critical Current

Links

Landscapes

  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE: To relieve stress concentration at the joint section for a pin so as to reduce defects in a molded article, by arranging an engaging recess at a bearing member that will abut to a mold member for forming the bearing pin, the engaging recess being capable of restraining the bearing section from shrinking when the molding is carried out and the bearing member and the mold member engage.
CONSTITUTION: A case body 1 is molded by injecting a synthetic resin into a cavity defined by a side outer mold 17, a bottom outer mold, an inner mold body 18 and slidable molds 19, 19. In this case, a vertical groove 23 is formed to extend from the upper edge to the bottom edge of each bearing section 7 which vertical groove is opposed to an elongated projection 22 on each slidable mold 19. During the period in which the case body 1 is cooled and solidified within the molds, the elongated projection 22 on the slidable mold 19 engages with the vertical groove 23, and this engagement restrains the bearing section 7 from shrinking in its extending direction. The case body 1 will be removed from the molds, and will be combined with a swingable lid 2 to be used as a housing case for a magnetic tape cartridge.
COPYRIGHT: (C)1981,JPO&Japio
JP6954080A 1980-05-27 1980-05-27 Method of production of housing case Pending JPS56166034A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6954080A JPS56166034A (en) 1980-05-27 1980-05-27 Method of production of housing case

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6954080A JPS56166034A (en) 1980-05-27 1980-05-27 Method of production of housing case

Publications (1)

Publication Number Publication Date
JPS56166034A true JPS56166034A (en) 1981-12-19

Family

ID=13405646

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6954080A Pending JPS56166034A (en) 1980-05-27 1980-05-27 Method of production of housing case

Country Status (1)

Country Link
JP (1) JPS56166034A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5244261U (en) * 1975-09-26 1977-03-29

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5244261U (en) * 1975-09-26 1977-03-29

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