JPS5942935A - 光デイスク用プラスチツク基板の成形金型 - Google Patents

光デイスク用プラスチツク基板の成形金型

Info

Publication number
JPS5942935A
JPS5942935A JP15398582A JP15398582A JPS5942935A JP S5942935 A JPS5942935 A JP S5942935A JP 15398582 A JP15398582 A JP 15398582A JP 15398582 A JP15398582 A JP 15398582A JP S5942935 A JPS5942935 A JP S5942935A
Authority
JP
Japan
Prior art keywords
plate
mold
forming
substrate
steel
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
JP15398582A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6241852B2 (enrdf_load_stackoverflow
Inventor
Mikio Takeshima
竹島　幹夫
Takeshi Okada
岡田　武司
Norihiro Funakoshi
船越　宣博
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 Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP15398582A priority Critical patent/JPS5942935A/ja
Publication of JPS5942935A publication Critical patent/JPS5942935A/ja
Publication of JPS6241852B2 publication Critical patent/JPS6241852B2/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
    • B29C45/26—Moulds
    • B29C45/263—Moulds with mould wall parts provided with fine grooves or impressions, e.g. for record discs

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
JP15398582A 1982-09-06 1982-09-06 光デイスク用プラスチツク基板の成形金型 Granted JPS5942935A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15398582A JPS5942935A (ja) 1982-09-06 1982-09-06 光デイスク用プラスチツク基板の成形金型

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15398582A JPS5942935A (ja) 1982-09-06 1982-09-06 光デイスク用プラスチツク基板の成形金型

Publications (2)

Publication Number Publication Date
JPS5942935A true JPS5942935A (ja) 1984-03-09
JPS6241852B2 JPS6241852B2 (enrdf_load_stackoverflow) 1987-09-04

Family

ID=15574384

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15398582A Granted JPS5942935A (ja) 1982-09-06 1982-09-06 光デイスク用プラスチツク基板の成形金型

Country Status (1)

Country Link
JP (1) JPS5942935A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0873237A4 (en) * 1995-01-31 1999-07-14 Digital Optics Corp MOLDING OF DIFFRACTANT OPTICAL ELEMENTS
JP2008157816A (ja) * 2006-12-25 2008-07-10 Tdk Corp 回転角検出装置及びトルク検出装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51103062U (enrdf_load_stackoverflow) * 1975-02-17 1976-08-18
JPS5378086A (en) * 1976-12-20 1978-07-11 Brother Ind Ltd Molding die for cord reel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51103062U (enrdf_load_stackoverflow) * 1975-02-17 1976-08-18
JPS5378086A (en) * 1976-12-20 1978-07-11 Brother Ind Ltd Molding die for cord reel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0873237A4 (en) * 1995-01-31 1999-07-14 Digital Optics Corp MOLDING OF DIFFRACTANT OPTICAL ELEMENTS
US6021106A (en) * 1995-01-31 2000-02-01 Digital Optics Corporation Molding diffractive optical elements
JP2008157816A (ja) * 2006-12-25 2008-07-10 Tdk Corp 回転角検出装置及びトルク検出装置

Also Published As

Publication number Publication date
JPS6241852B2 (enrdf_load_stackoverflow) 1987-09-04

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