JPS5772822A - Production of plastic lens - Google Patents

Production of plastic lens

Info

Publication number
JPS5772822A
JPS5772822A JP14941180A JP14941180A JPS5772822A JP S5772822 A JPS5772822 A JP S5772822A JP 14941180 A JP14941180 A JP 14941180A JP 14941180 A JP14941180 A JP 14941180A JP S5772822 A JPS5772822 A JP S5772822A
Authority
JP
Japan
Prior art keywords
resin
cavities
charge amount
controlled independently
charged
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.)
Pending
Application number
JP14941180A
Other languages
Japanese (ja)
Inventor
Hisao Inage
Masamichi Takeshita
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP14941180A priority Critical patent/JPS5772822A/en
Publication of JPS5772822A publication Critical patent/JPS5772822A/en
Pending 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
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1671—Making multilayered or multicoloured articles with an insert
    • 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
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C2045/1486—Details, accessories and auxiliary operations
    • B29C2045/14942—Floating inserts, e.g. injecting simultaneously onto both sides of an insert through a pair of opposed gates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2011/00—Optical elements, e.g. lenses, prisms
    • B29L2011/0016—Lenses

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (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)

Abstract

PURPOSE:To enhance the accuracy of a lens shape and the yield by a method wherein a resin passage is separated into plural resin passages so that the flow velocity, pressure and charge amount of a molten resin charged into two cavities formed between a lens blank and lining pieces can be controlled independently. CONSTITUTION:The cavities 3a, 4a and the resin passages connected respectively to the cavities are provided independently so that the flw velocity, pressure and charge amount of the resin charged into the cavities can be controlled independently. Then, the molten resin is injected into the cavitites 3a, 4a through the respective passages. In this case, since the amount of the resin charged into each of the cavities is set, the charge amount is always balanced. The new resin layers produced after charging the resin into the cavities are pressurized by using seperate hydraulic mechanisms provided for the lining pieces 3 and 4, respectively. Accordingly, since the resin passage is split and the flow velocity, charge amount and the like of the resin can be controlled independently for each cavity, a plastic lens excellent in accuracy of shape can be obtained.
JP14941180A 1980-10-27 1980-10-27 Production of plastic lens Pending JPS5772822A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14941180A JPS5772822A (en) 1980-10-27 1980-10-27 Production of plastic lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14941180A JPS5772822A (en) 1980-10-27 1980-10-27 Production of plastic lens

Publications (1)

Publication Number Publication Date
JPS5772822A true JPS5772822A (en) 1982-05-07

Family

ID=15474528

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14941180A Pending JPS5772822A (en) 1980-10-27 1980-10-27 Production of plastic lens

Country Status (1)

Country Link
JP (1) JPS5772822A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001525269A (en) * 1997-12-11 2001-12-11 エシロール アテルナジオナール カンパニー ジェネラーレ デ オプティック Eyeglass lens including useful surface microstructure and method for producing the same
EP2666619A1 (en) * 2012-05-23 2013-11-27 Canon Kabushiki Kaisha Plastic optical element and method of manufacturing the same
US8964313B2 (en) 2010-11-24 2015-02-24 Canon Kabushiki Kaisha Plastic optical element and method of making the same
US9360666B2 (en) 2012-05-23 2016-06-07 Canon Kabushiki Kaisha Plastics optical component and method for manufacturing the same
JP2019130832A (en) * 2018-01-31 2019-08-08 住友重機械工業株式会社 Injection molding method and molding device
JP2020055196A (en) * 2018-10-01 2020-04-09 株式会社日本製鋼所 Molding method and molding die for resin lens having flange around

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001525269A (en) * 1997-12-11 2001-12-11 エシロール アテルナジオナール カンパニー ジェネラーレ デ オプティック Eyeglass lens including useful surface microstructure and method for producing the same
US8964313B2 (en) 2010-11-24 2015-02-24 Canon Kabushiki Kaisha Plastic optical element and method of making the same
EP2666619A1 (en) * 2012-05-23 2013-11-27 Canon Kabushiki Kaisha Plastic optical element and method of manufacturing the same
JP2013246207A (en) * 2012-05-23 2013-12-09 Canon Inc Plastic optical member and method for manufacturing the same
US8947795B2 (en) 2012-05-23 2015-02-03 Canon Kabushiki Kaisha Plastic optical element and method of manufacturing the same
US9360666B2 (en) 2012-05-23 2016-06-07 Canon Kabushiki Kaisha Plastics optical component and method for manufacturing the same
JP2019130832A (en) * 2018-01-31 2019-08-08 住友重機械工業株式会社 Injection molding method and molding device
JP2020055196A (en) * 2018-10-01 2020-04-09 株式会社日本製鋼所 Molding method and molding die for resin lens having flange around

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