JPS5669126A - Method of manufacturing record disc - Google Patents

Method of manufacturing record disc

Info

Publication number
JPS5669126A
JPS5669126A JP14560279A JP14560279A JPS5669126A JP S5669126 A JPS5669126 A JP S5669126A JP 14560279 A JP14560279 A JP 14560279A JP 14560279 A JP14560279 A JP 14560279A JP S5669126 A JPS5669126 A JP S5669126A
Authority
JP
Japan
Prior art keywords
metallic
surface member
mold
center shaft
record disc
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
JP14560279A
Other languages
Japanese (ja)
Inventor
Masao Saito
Masaru Kobayashi
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.)
Nippon Columbia Co Ltd
Original Assignee
Nippon Columbia Co 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 Nippon Columbia Co Ltd filed Critical Nippon Columbia Co Ltd
Priority to JP14560279A priority Critical patent/JPS5669126A/en
Publication of JPS5669126A publication Critical patent/JPS5669126A/en
Pending legal-status Critical Current

Links

Landscapes

  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE: To manufacture an illustrated record disc with sound grooves having precise shape and the superior tone quality by a method wherein the press molding is performed by inserting a surface member, a metallic plate and another surface member to the center shaft of the lower metallic mold.
CONSTITUTION: To a center shaft 5 of a lower metallic mold 2 for record disc pressing metallic molds including a stamper 4, a surface member 6 made of thermoplastic resin and previously gelled by heatig, a metallic plate 7 having at the surface thereof letters, figures or he like formed by printing, sculpturing or etching, and another surface member 8 made of the same material as that of the surface member 6 are inserted in turn. An upper metallic mold 1 including a stamper 3 and the lower metallic mold 2 are heated. Then, both metallic molds 1, 2 are closed and further heated while being pressed. After allowing the surface members 6, 8 to radially flow around the center shaft 5 of the lower mold 2 to form sound grooves, the metallic molds are cooled so as to unify the surface members 6, 8 and the matallic plate 7 to each other.
COPYRIGHT: (C)1981,JPO&Japio
JP14560279A 1979-11-09 1979-11-09 Method of manufacturing record disc Pending JPS5669126A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14560279A JPS5669126A (en) 1979-11-09 1979-11-09 Method of manufacturing record disc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14560279A JPS5669126A (en) 1979-11-09 1979-11-09 Method of manufacturing record disc

Publications (1)

Publication Number Publication Date
JPS5669126A true JPS5669126A (en) 1981-06-10

Family

ID=15388843

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14560279A Pending JPS5669126A (en) 1979-11-09 1979-11-09 Method of manufacturing record disc

Country Status (1)

Country Link
JP (1) JPS5669126A (en)

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