JPS5656821A - Molded article with tape sliding surface and manufacture thereof - Google Patents

Molded article with tape sliding surface and manufacture thereof

Info

Publication number
JPS5656821A
JPS5656821A JP13399679A JP13399679A JPS5656821A JP S5656821 A JPS5656821 A JP S5656821A JP 13399679 A JP13399679 A JP 13399679A JP 13399679 A JP13399679 A JP 13399679A JP S5656821 A JPS5656821 A JP S5656821A
Authority
JP
Japan
Prior art keywords
die
dents
resin
molded article
cured
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
JP13399679A
Other languages
Japanese (ja)
Inventor
Hitoshi Hirano
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP13399679A priority Critical patent/JPS5656821A/en
Publication of JPS5656821A publication Critical patent/JPS5656821A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D15/00—Producing gear wheels or similar articles with grooves or projections, e.g. control knobs

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

PURPOSE:To readily mold desired dents using the difference between shrinking percentages of a surface resin layer by a method wherein the resin is filled and cured in an inside layer which forms dents on its outside surface and is used as an inner die in order to form a molded body where both the inner die and the resin molded article are combined into a unitary body. CONSTITUTION:An insert material 28 having dents 15 and projections 16 which both have been formed previously is inserted into an inner die 8, a resin composition solution 17 is injected into a molding space 7 made up of an upper and a lower die 9, 3 and an outer die 4 and the complete die 13 is rotated with a push plate 10. When fillers such as graphite and the like diffused in the composition solution 17 move in a circumferential direction and are accumulated near the surface, the die is given a higher temperature and is cured. A desired dent 22 is formed by the difference between shrinking percentage of a surface resin layer 20 and this dent 22 acts as air film and the tape is prevented from being damaged when it runs.
JP13399679A 1979-10-17 1979-10-17 Molded article with tape sliding surface and manufacture thereof Pending JPS5656821A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13399679A JPS5656821A (en) 1979-10-17 1979-10-17 Molded article with tape sliding surface and manufacture thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13399679A JPS5656821A (en) 1979-10-17 1979-10-17 Molded article with tape sliding surface and manufacture thereof

Publications (1)

Publication Number Publication Date
JPS5656821A true JPS5656821A (en) 1981-05-19

Family

ID=15117941

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13399679A Pending JPS5656821A (en) 1979-10-17 1979-10-17 Molded article with tape sliding surface and manufacture thereof

Country Status (1)

Country Link
JP (1) JPS5656821A (en)

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