JPS5591640A - Injection molding of plastic transparent product - Google Patents

Injection molding of plastic transparent product

Info

Publication number
JPS5591640A
JPS5591640A JP16183378A JP16183378A JPS5591640A JP S5591640 A JPS5591640 A JP S5591640A JP 16183378 A JP16183378 A JP 16183378A JP 16183378 A JP16183378 A JP 16183378A JP S5591640 A JPS5591640 A JP S5591640A
Authority
JP
Japan
Prior art keywords
gate
lambda
product
injection molding
cavity
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
JP16183378A
Other languages
Japanese (ja)
Other versions
JPS6157167B2 (en
Inventor
Shunji Uchio
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.)
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry 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 Asahi Chemical Industry Co Ltd filed Critical Asahi Chemical Industry Co Ltd
Priority to JP16183378A priority Critical patent/JPS5591640A/en
Publication of JPS5591640A publication Critical patent/JPS5591640A/en
Publication of JPS6157167B2 publication Critical patent/JPS6157167B2/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
    • B29C45/37—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings
    • 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
    • B29C45/2708—Gates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00596—Mirrors

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To provide a product having homogeneous isotropic feature by making an ultra mirror polishing in the inner surface of the mold, in particular a forming cavity surface by setting a surface roughness and accuracy to a specified value. CONSTITUTION:In an injection molding dies, the first gate 3 forms a connection part between a runner 2 and the second gate 4, the second gate 4 has a shape having a coat-hunger type shoulder from the first gate 3, has a throat 5 and is connected to the cavity 1. The inner surface of the cavity 1 is ultra mirror polished in advance such that a surface roughness of the product is less than 0.2mu, has a surface of lambda/2 under a Newton fringe test (lambda=583mmu or lambda=546.1mmu) and not more than 30 fringe at the measured all surfaces. The product formed by this mold has a superior surface accuracy, a homogeneous isomeric feature and can be used for an optical lens etc.
JP16183378A 1978-12-29 1978-12-29 Injection molding of plastic transparent product Granted JPS5591640A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16183378A JPS5591640A (en) 1978-12-29 1978-12-29 Injection molding of plastic transparent product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16183378A JPS5591640A (en) 1978-12-29 1978-12-29 Injection molding of plastic transparent product

Publications (2)

Publication Number Publication Date
JPS5591640A true JPS5591640A (en) 1980-07-11
JPS6157167B2 JPS6157167B2 (en) 1986-12-05

Family

ID=15742783

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16183378A Granted JPS5591640A (en) 1978-12-29 1978-12-29 Injection molding of plastic transparent product

Country Status (1)

Country Link
JP (1) JPS5591640A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59188601A (en) * 1983-04-11 1984-10-26 Hitachi Ltd Plastic lens
WO2005095083A1 (en) * 2004-03-31 2005-10-13 Zeon Corporation Mold for light guide plate injection molding and light guide plate manufacturing method using same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5393850A (en) * 1977-01-25 1978-08-17 Pii Ueebaa Haaman Method and system of ejecting lens and lens blank

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5393850A (en) * 1977-01-25 1978-08-17 Pii Ueebaa Haaman Method and system of ejecting lens and lens blank

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59188601A (en) * 1983-04-11 1984-10-26 Hitachi Ltd Plastic lens
WO2005095083A1 (en) * 2004-03-31 2005-10-13 Zeon Corporation Mold for light guide plate injection molding and light guide plate manufacturing method using same

Also Published As

Publication number Publication date
JPS6157167B2 (en) 1986-12-05

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