JPH0379322A - Disk molding die - Google Patents

Disk molding die

Info

Publication number
JPH0379322A
JPH0379322A JP21653589A JP21653589A JPH0379322A JP H0379322 A JPH0379322 A JP H0379322A JP 21653589 A JP21653589 A JP 21653589A JP 21653589 A JP21653589 A JP 21653589A JP H0379322 A JPH0379322 A JP H0379322A
Authority
JP
Japan
Prior art keywords
resin
disk
male
cutter
sprue bush
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
JP21653589A
Other languages
Japanese (ja)
Other versions
JPH0628882B2 (en
Inventor
Ikuo Asai
Original Assignee
Meiki 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 Meiki Co Ltd filed Critical Meiki Co Ltd
Priority to JP1216535A priority Critical patent/JPH0628882B2/en
Publication of JPH0379322A publication Critical patent/JPH0379322A/en
Publication of JPH0628882B2 publication Critical patent/JPH0628882B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/38Cutting-off equipment for sprues or ingates
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/26Moulds
    • B29C45/263Moulds with mould wall parts provided with fine grooves or impressions, e.g. for record discs

Abstract

PURPOSE: To punch a disk center hole without scoring of a male cutter and a female cutter by moving the male cutter forward until the same is brought into contact with a sprue bush and solidifying a resin material, and then opening a mold, projecting an ejected sleeve and working the same.
CONSTITUTION: In the state that a resin material 38 is still flowable, a male cutter 24 is projected to a position of being in contact with a sprue bush 16, and the male cutter 24 and the sprue bush 16 are brought together as close as possible, and the resin material 38 is cooled and solidified in the state that a very thin resin layer 40 is formed between the surfaces facing each other. After that, when a disk 18 is released from a moveable mold 12 by the ejecting motion of the ejector sleeve 22, a resin connection section 46 of a solidified section of the resin layer 40 is cut on its outer peripheral edge to punch a central hole 20 of the disk 18. Thus, the disk 18 with the central hole 20 is formed in a space between the male and female cutters without scoring.
COPYRIGHT: (C)1991,JPO&Japio
JP1216535A 1989-08-23 1989-08-23 Disc molding method Expired - Fee Related JPH0628882B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1216535A JPH0628882B2 (en) 1989-08-23 1989-08-23 Disc molding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1216535A JPH0628882B2 (en) 1989-08-23 1989-08-23 Disc molding method

Publications (2)

Publication Number Publication Date
JPH0379322A true JPH0379322A (en) 1991-04-04
JPH0628882B2 JPH0628882B2 (en) 1994-04-20

Family

ID=16689962

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1216535A Expired - Fee Related JPH0628882B2 (en) 1989-08-23 1989-08-23 Disc molding method

Country Status (1)

Country Link
JP (1) JPH0628882B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002049027A1 (en) * 2000-12-15 2002-06-20 Sony Corporation Disk substrate, molding apparatus for injection-molding it, and disk substrate pick-up robot
JP2005306011A (en) * 2004-03-25 2005-11-04 Ricoh Co Ltd Molding method of recording disc, molding apparatus for recording disc and mold for recording disc
JP2007261072A (en) * 2006-03-28 2007-10-11 Nissei Plastics Ind Co Ejection releasing method for information recording disk substrate
US7559761B2 (en) 2004-11-18 2009-07-14 Panasonic Corporation Injection molding machine, injection molding method and injection mold

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4085178A (en) * 1975-12-18 1978-04-18 Rca Corporation Method for producing injection molded and centrally apertured disc records
JPS6351714U (en) * 1986-09-20 1988-04-07
JPS63147619A (en) * 1986-12-10 1988-06-20 Nec Corp Punching of bore in resin disk

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4085178A (en) * 1975-12-18 1978-04-18 Rca Corporation Method for producing injection molded and centrally apertured disc records
JPS6351714U (en) * 1986-09-20 1988-04-07
JPS63147619A (en) * 1986-12-10 1988-06-20 Nec Corp Punching of bore in resin disk

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002049027A1 (en) * 2000-12-15 2002-06-20 Sony Corporation Disk substrate, molding apparatus for injection-molding it, and disk substrate pick-up robot
JP2002240101A (en) * 2000-12-15 2002-08-28 Sony Corp Disk board and mold apparatus for injection molding the same, robot for fetching disk board
US7229275B2 (en) 2000-12-15 2007-06-12 Sony Corporation Disk substrate, mold apparatus for injection molding the same, and disk substrate taking-out robot
JP2005306011A (en) * 2004-03-25 2005-11-04 Ricoh Co Ltd Molding method of recording disc, molding apparatus for recording disc and mold for recording disc
US7559761B2 (en) 2004-11-18 2009-07-14 Panasonic Corporation Injection molding machine, injection molding method and injection mold
JP2007261072A (en) * 2006-03-28 2007-10-11 Nissei Plastics Ind Co Ejection releasing method for information recording disk substrate
JP4526502B2 (en) * 2006-03-28 2010-08-18 日精樹脂工業株式会社 Method of protruding and releasing information recording disk substrate

Also Published As

Publication number Publication date
JPH0628882B2 (en) 1994-04-20

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