GB2006666A - Producing holes in injection moulded discs - Google Patents

Producing holes in injection moulded discs

Info

Publication number
GB2006666A
GB2006666A GB7834080A GB7834080A GB2006666A GB 2006666 A GB2006666 A GB 2006666A GB 7834080 A GB7834080 A GB 7834080A GB 7834080 A GB7834080 A GB 7834080A GB 2006666 A GB2006666 A GB 2006666A
Authority
GB
United Kingdom
Prior art keywords
sprue
punch
mould
end portion
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.)
Granted
Application number
GB7834080A
Other versions
GB2006666B (en
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.)
Discovision Associates
Original Assignee
MCA Discovision Inc
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25300444&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=GB2006666(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by MCA Discovision Inc filed Critical MCA Discovision Inc
Publication of GB2006666A publication Critical patent/GB2006666A/en
Application granted granted Critical
Publication of GB2006666B publication Critical patent/GB2006666B/en
Expired 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
    • 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
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2701—Details not specific to hot or cold runner channels
    • 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
    • B29C45/38—Cutting-off equipment for sprues or ingates
    • 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
    • B29C2045/2653—Moulds with mould wall parts provided with fine grooves or impressions, e.g. for record discs using two stampers

Abstract

Heated material is injected into an annular cavity 175a (figure 4), defined by a pair of mould halves 18, 30, through a sprue passage 175, defined by a sprue bushing 110 and an end portion of a punch 162. After partial cooling of the material, the punch 162 is locked in place while the annular cavity is displaced relative to the sprue passage so that the sprue and a central disc 274 of the moulded disc are severed along the peripheral surface of the punch end portion to leave a moulded annular part (as shown in figure 4). The mould halves are separated while the severed sprue is held to the punch by locking surfaces 173. A sprue ejector member 156 is projected from the punch to eject the sprue from the punch end portion. The finished annular part e.g. a video disc is then removed, carried by the moving platen of the moving mould assembly. A flow regulating injection gate 298 is also provided (see figure 9), and cooling of the mould assembly is effected using spiral cooling channels in a mould portion. <IMAGE>
GB7834080A 1977-10-31 1978-08-21 Method and means for replicating centrally apertured videodisc records Expired GB2006666B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84736777A 1977-10-31 1977-10-31

Publications (2)

Publication Number Publication Date
GB2006666A true GB2006666A (en) 1979-05-10
GB2006666B GB2006666B (en) 1982-09-02

Family

ID=25300444

Family Applications (2)

Application Number Title Priority Date Filing Date
GB8029412A Expired GB2060471B (en) 1977-10-31 1978-08-21 Cooling injection moulding apparatus
GB7834080A Expired GB2006666B (en) 1977-10-31 1978-08-21 Method and means for replicating centrally apertured videodisc records

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB8029412A Expired GB2060471B (en) 1977-10-31 1978-08-21 Cooling injection moulding apparatus

Country Status (16)

Country Link
JP (5) JPS5858214B2 (en)
AU (1) AU512873B2 (en)
BE (1) BE871710A (en)
BR (1) BR7807136A (en)
CA (1) CA1102973A (en)
CH (1) CH635027A5 (en)
DE (1) DE2838634C2 (en)
DK (1) DK158288C (en)
FR (1) FR2407067A1 (en)
GB (2) GB2060471B (en)
HK (2) HK42386A (en)
IT (3) IT1120250B (en)
MX (1) MX147565A (en)
NL (1) NL187734C (en)
NO (1) NO158724C (en)
SE (2) SE429520B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1514666A1 (en) * 2003-09-08 2005-03-16 AWM Mold Tech AG Mould for manufacturing disc-shaped information carriers

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL193078C (en) * 1977-10-31 1998-09-08 Mca Disco Vision Injection molding device.
JPS57109620A (en) * 1980-12-26 1982-07-08 Matsushita Electric Ind Co Ltd Molding apparatus of disk like recording medium
JPS58151223A (en) * 1982-03-05 1983-09-08 Nippon Telegr & Teleph Corp <Ntt> Manufacturing method and mold of optical disk substrate
JPS58188636A (en) * 1982-04-30 1983-11-04 Sumitomo Heavy Ind Ltd Injection molding machine with punching mechanism
DE3442023A1 (en) * 1984-11-16 1986-05-28 Krauss-Maffei AG, 8000 München METHOD AND DEVICE FOR PUNCHING AND REMOVING THE CASTING PART IN AN INJECTION MOLDING TOOL
US4911968A (en) * 1985-02-18 1990-03-27 Hitachi Maxell, Ltd. Optical disc
US5273598A (en) * 1985-02-18 1993-12-28 Hitachi Maxell, Ltd. Optical disc manufacturing method
DE3526632A1 (en) * 1985-07-25 1987-02-05 Krauss Maffei Ag METHOD AND DEVICE FOR PRODUCING AN INJECTION MOLDING PART
DE3542878A1 (en) * 1985-12-02 1987-06-11 Stuebbe Gmbh Maschf Ejector device for injection moulding machines
JPH0320100Y2 (en) * 1986-02-21 1991-04-30
DE3613334A1 (en) * 1986-04-19 1987-10-22 Kloeckner Ferromatik Desma INJECTION MOLD FOR INJECTION MOLDING INFORMATION CARRIER PLATES
US4795127A (en) * 1986-09-27 1989-01-03 Kabushikik Kaisha Meiki Seisakusho Mold assembly of injection-molding machine
JPH0671739B2 (en) * 1987-12-19 1994-09-14 パイオニア株式会社 Information recording disk substrate injection molding machine
JPH0763991B2 (en) * 1988-04-16 1995-07-12 ダイセル化学工業株式会社 Mold for molding optical disc substrate with format
DE3908188C2 (en) * 1989-03-14 1998-10-29 Tetra Pak Gmbh Plastic injection molding tool
GB2235895A (en) * 1989-08-23 1991-03-20 Gerald Dennis Day Moulding tool cooling apparatus
JP2944359B2 (en) * 1993-03-23 1999-09-06 株式会社精工技研 Base injection mold
DE10032337A1 (en) * 2000-07-04 2002-01-17 Bosch Gmbh Robert Connection carrier and method for connecting the connection carrier to an injection molded part
JP4670196B2 (en) * 2001-07-27 2011-04-13 ソニー株式会社 Injection molding apparatus and injection molding method
DE10152932A1 (en) 2001-10-26 2003-05-08 Krauss Maffei Kunststofftech Device for removing an injection molded ....
JP5273774B2 (en) * 2008-04-04 2013-08-28 帝人株式会社 Aromatic polycarbonate resin injection molded products
JP2010031078A (en) * 2008-07-25 2010-02-12 Teijin Chem Ltd Treatment method of aromatic polycarbonate resin molding

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE957693C (en) * 1957-01-17 Jantzen &. Saebeler, Hamburg-Schneisen Press mold for the production of plastic records
GB147865A (en) * 1916-08-14 1922-01-09 Columbia Graphophone Mfg Co Improvements in dies or moulds used for duplicating gramophone records and for like purposes
US1582704A (en) * 1923-09-08 1926-04-27 Scranton Button Company Die for phonograph records
US2491068A (en) * 1947-01-28 1949-12-13 William M Adams Record stamper
US2613395A (en) * 1949-02-24 1952-10-14 M & W Company Inc Apparatus and method for producing disk phonograph records
GB881736A (en) * 1957-03-14 1961-11-08 Philips Electrical Ind Ltd Improvements in or relating to dies for moulding of flat objects which are thin as compared with their surface dimensions
GB1071340A (en) * 1965-01-27 1967-06-07 Decca Ltd Improvements in or relating to apparatus for making gramophone records
FR1487308A (en) * 1965-07-29 1967-07-07 Carl Lindstrom Ges M B H Improvements to phonograph record presses
FR1509997A (en) * 1966-11-29 1968-01-19 Pathe Marconi Ind Music Improvements in the production of phonographic records by injection
CA1041256A (en) * 1974-05-13 1978-10-31 Csaba K. Hunyar Phonograph record pressing die assembly
JPS511312U (en) * 1974-06-17 1976-01-07
US3989436A (en) * 1975-12-18 1976-11-02 Rca Corporation Apparatus for producing injection molded and centrally apertured disc records
GB1509362A (en) * 1977-01-17 1978-05-04 Emi Electrola Gmbh Disc record press

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1514666A1 (en) * 2003-09-08 2005-03-16 AWM Mold Tech AG Mould for manufacturing disc-shaped information carriers
US7300609B2 (en) 2003-09-08 2007-11-27 Awm Mold Tech Ag Injection-moulding tool for the production of information carriers in disc form

Also Published As

Publication number Publication date
CA1102973A (en) 1981-06-16
SE429520B (en) 1983-09-12
SE8200349L (en) 1982-01-22
IT7851675A0 (en) 1978-10-27
HK42386A (en) 1986-06-13
IT7851677A0 (en) 1978-10-27
GB2060471B (en) 1982-09-08
JPS5469169A (en) 1979-06-02
NO158724B (en) 1988-07-18
SE7808930L (en) 1979-05-01
JPS56139940A (en) 1981-10-31
HK42286A (en) 1986-06-13
NL187734C (en) 1992-01-02
JPS6018527B2 (en) 1985-05-10
FR2407067B1 (en) 1984-04-27
FR2407067A1 (en) 1979-05-25
NL7808979A (en) 1979-05-02
NO783040L (en) 1979-05-02
JPH0319049B2 (en) 1991-03-14
IT1117449B (en) 1986-02-17
DK158288C (en) 1990-10-01
GB2060471A (en) 1981-05-07
AU512873B2 (en) 1980-10-30
BE871710A (en) 1979-04-30
DE2838634A1 (en) 1979-05-03
DE2838634C2 (en) 1986-01-09
JPS62275728A (en) 1987-11-30
SE438624B (en) 1985-04-29
JPS5858214B2 (en) 1983-12-23
NO158724C (en) 1988-10-26
JPS641290B2 (en) 1989-01-11
JPS6477511A (en) 1989-03-23
DK158288B (en) 1990-04-30
IT7851676A0 (en) 1978-10-27
IT1120250B (en) 1986-03-19
IT1157388B (en) 1987-02-11
JPS62275729A (en) 1987-11-30
CH635027A5 (en) 1983-03-15
GB2006666B (en) 1982-09-02
AU4011478A (en) 1980-03-27
MX147565A (en) 1982-12-14
NL187734B (en) 1991-08-01
BR7807136A (en) 1979-05-08
DK396378A (en) 1979-05-01
JPH0262373B2 (en) 1990-12-25

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19980820

727G Proceeding under section 27(5) patents act 1977

Free format text: ORDERS STAYED PENDING APPEAL

772R Patent revoked (sect. 72/1977)