JPS6477511A - Injection molding equipment for optical disk - Google Patents

Injection molding equipment for optical disk

Info

Publication number
JPS6477511A
JPS6477511A JP63122258A JP12225888A JPS6477511A JP S6477511 A JPS6477511 A JP S6477511A JP 63122258 A JP63122258 A JP 63122258A JP 12225888 A JP12225888 A JP 12225888A JP S6477511 A JPS6477511 A JP S6477511A
Authority
JP
Japan
Prior art keywords
annular
molding cavity
passage
cavity
sprue passage
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
JP63122258A
Other languages
Japanese (ja)
Other versions
JPH0262373B2 (en
Inventor
Aaru Horumesu Jiyon
Jii Jiyoodan Roi
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
Discovision Associates
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=JPS6477511(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Discovision Associates filed Critical Discovision Associates
Publication of JPS6477511A publication Critical patent/JPS6477511A/en
Publication of JPH0262373B2 publication Critical patent/JPH0262373B2/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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Casting Devices For Molds (AREA)

Abstract

PURPOSE: To obtain the double refraction of almost uniform value throughout the total information holding face of a video disc member by using an annular sprue passage on an intermediate position between a main sprue passage and a video disc cavity, and flowing the molten material into a disc cavity in a state that the injection material is free from the stress gradient. CONSTITUTION: A sprue passage 114 for injecting the optically transparent molten molding material and an annular gate passage 298 connecting the sprue passage and an annular molding cavity 306, having a thickness thicker than an inlet of the annular molding cavity, and comprising an annular flow reducing part positioned on the area of an inlet 110a and outlet 110b from the sprue passage and an annular outlet having a thickness smaller than the annular molding cavity, are mounted inside in the radius direction of the annular molding cavity 306. The shape of the annular gate passage 298 is formed so that the optically transparent molten molding material from the sprue passage 114 can be injected from the annular outlet into the annular molding cavity 306 without stress at the equal radial velocity to every direction, whereby the fluctuation of the double refraction value throughout the total information holding face of the optical disc formed in the annular molding cavity can be minized.
JP63122258A 1977-10-31 1988-05-20 Injection molding equipment for optical disk Granted JPS6477511A (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
JPS6477511A true JPS6477511A (en) 1989-03-23
JPH0262373B2 JPH0262373B2 (en) 1990-12-25

Family

ID=25300444

Family Applications (5)

Application Number Title Priority Date Filing Date
JP53108674A Expired JPS5858214B2 (en) 1977-10-31 1978-09-06 How to make optical disc replicas
JP56008071A Expired JPS6018527B2 (en) 1977-10-31 1981-01-23 Optical record injection molding machine
JP62092954A Granted JPS62275729A (en) 1977-10-31 1987-04-15 Cooling device for injection molding machine
JP62092953A Granted JPS62275728A (en) 1977-10-31 1987-04-15 Cooling device for injection molding machine
JP63122258A Granted JPS6477511A (en) 1977-10-31 1988-05-20 Injection molding equipment for optical disk

Family Applications Before (4)

Application Number Title Priority Date Filing Date
JP53108674A Expired JPS5858214B2 (en) 1977-10-31 1978-09-06 How to make optical disc replicas
JP56008071A Expired JPS6018527B2 (en) 1977-10-31 1981-01-23 Optical record injection molding machine
JP62092954A Granted JPS62275729A (en) 1977-10-31 1987-04-15 Cooling device for injection molding machine
JP62092953A Granted JPS62275728A (en) 1977-10-31 1987-04-15 Cooling device for injection molding machine

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) IT1157388B (en)
MX (1) MX147565A (en)
NL (1) NL187734C (en)
NO (1) NO158724C (en)
SE (2) SE429520B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003039496A (en) * 2001-07-27 2003-02-13 Sony Corp Injection molding apparatus and injection molding method
CN101549563A (en) * 2008-04-04 2009-10-07 帝人化成株式会社 Aromatic panlite formed piece
CN101633242A (en) * 2008-07-25 2010-01-27 帝人化成株式会社 Processing method for aromatic polycarbonate resin moldings

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
US5273598A (en) * 1985-02-18 1993-12-28 Hitachi Maxell, Ltd. Optical disc manufacturing method
US4911968A (en) * 1985-02-18 1990-03-27 Hitachi Maxell, Ltd. Optical disc
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
DE10152932A1 (en) 2001-10-26 2003-05-08 Krauss Maffei Kunststofftech Device for removing an injection molded ....
DE502004009850D1 (en) * 2003-09-08 2009-09-17 Awm Mold Tech Ag Injection molding tool for the production of disc-shaped information carriers
CN110385749A (en) * 2019-08-01 2019-10-29 杭州凯之奕科技有限公司 An automatic assembly equipment for injection molding heddle production
DE102019218518A1 (en) 2019-11-29 2021-06-02 Robert Bosch Gmbh Irrigation system

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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003039496A (en) * 2001-07-27 2003-02-13 Sony Corp Injection molding apparatus and injection molding method
CN101549563A (en) * 2008-04-04 2009-10-07 帝人化成株式会社 Aromatic panlite formed piece
CN101633242A (en) * 2008-07-25 2010-01-27 帝人化成株式会社 Processing method for aromatic polycarbonate resin moldings

Also Published As

Publication number Publication date
DK158288B (en) 1990-04-30
BR7807136A (en) 1979-05-08
HK42386A (en) 1986-06-13
IT7851675A0 (en) 1978-10-27
IT7851677A0 (en) 1978-10-27
HK42286A (en) 1986-06-13
FR2407067A1 (en) 1979-05-25
GB2006666B (en) 1982-09-02
JPS62275728A (en) 1987-11-30
JPS5858214B2 (en) 1983-12-23
NL7808979A (en) 1979-05-02
NL187734C (en) 1992-01-02
SE7808930L (en) 1979-05-01
MX147565A (en) 1982-12-14
SE429520B (en) 1983-09-12
AU512873B2 (en) 1980-10-30
DK158288C (en) 1990-10-01
DE2838634C2 (en) 1986-01-09
JPS62275729A (en) 1987-11-30
SE438624B (en) 1985-04-29
IT1120250B (en) 1986-03-19
CA1102973A (en) 1981-06-16
JPS5469169A (en) 1979-06-02
GB2060471B (en) 1982-09-08
CH635027A5 (en) 1983-03-15
JPH0262373B2 (en) 1990-12-25
NO158724B (en) 1988-07-18
DE2838634A1 (en) 1979-05-03
GB2006666A (en) 1979-05-10
GB2060471A (en) 1981-05-07
JPH0319049B2 (en) 1991-03-14
IT1117449B (en) 1986-02-17
IT7851676A0 (en) 1978-10-27
JPS641290B2 (en) 1989-01-11
DK396378A (en) 1979-05-01
FR2407067B1 (en) 1984-04-27
AU4011478A (en) 1980-03-27
NO783040L (en) 1979-05-02
NL187734B (en) 1991-08-01
JPS6018527B2 (en) 1985-05-10
JPS56139940A (en) 1981-10-31
BE871710A (en) 1979-04-30
NO158724C (en) 1988-10-26
IT1157388B (en) 1987-02-11
SE8200349L (en) 1982-01-22

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