JPS56123829A - Molding method for plastic lens or plate - Google Patents

Molding method for plastic lens or plate

Info

Publication number
JPS56123829A
JPS56123829A JP2650780A JP2650780A JPS56123829A JP S56123829 A JPS56123829 A JP S56123829A JP 2650780 A JP2650780 A JP 2650780A JP 2650780 A JP2650780 A JP 2650780A JP S56123829 A JPS56123829 A JP S56123829A
Authority
JP
Japan
Prior art keywords
ethyl acrylate
plastic lens
plate
molding method
copolymer
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
JP2650780A
Other languages
Japanese (ja)
Other versions
JPH0117848B2 (en
Inventor
Katsuhiko Hayashi
Kazuyuki Isobe
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.)
NUC Corp
Original Assignee
Nippon Unicar 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 Nippon Unicar Co Ltd filed Critical Nippon Unicar Co Ltd
Priority to JP2650780A priority Critical patent/JPS56123829A/en
Publication of JPS56123829A publication Critical patent/JPS56123829A/en
Publication of JPH0117848B2 publication Critical patent/JPH0117848B2/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
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/0048—Moulds for lenses
    • B29D11/00528—Consisting of two mould halves joined by an annular gasket
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/0038—Moulds or cores; Details thereof or accessories therefor with sealing means or the like
    • 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
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/00413—Production of simple or compound lenses made by moulding between two mould parts which are not in direct contact with one another, e.g. comprising a seal between or on the edges
    • 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
    • B29L2031/00—Other particular articles
    • B29L2031/76—Office equipment or accessories
    • B29L2031/7602—Maps

Landscapes

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

Abstract

PURPOSE:To prevent defects and improve precision, by using the gasket made of copolymer of ethylene and ethyl acrylate containing a specific amount of ethyl acrylate and having a specific melt index. CONSTITUTION:Liquid monomer 4 is poured between the molds 2, 3 with the intervention of a gasket 1 made of copolymer of ethylene and ethyl acrylate containing 5-35wt% of ethyl acrylate and having a melt index of 1-30g/10mm., which is hardened with the molds supported by a clamp 5, to shape a plastic lens or plate body. Glass is most suitable as the materials for mold. Diethyleneglycol bisallyl-carbonate or the mixture of this and acrylic monomer such as methyl methacrylate are most suitable for the liquid monomer.
JP2650780A 1980-03-05 1980-03-05 Molding method for plastic lens or plate Granted JPS56123829A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2650780A JPS56123829A (en) 1980-03-05 1980-03-05 Molding method for plastic lens or plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2650780A JPS56123829A (en) 1980-03-05 1980-03-05 Molding method for plastic lens or plate

Publications (2)

Publication Number Publication Date
JPS56123829A true JPS56123829A (en) 1981-09-29
JPH0117848B2 JPH0117848B2 (en) 1989-04-03

Family

ID=12195389

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2650780A Granted JPS56123829A (en) 1980-03-05 1980-03-05 Molding method for plastic lens or plate

Country Status (1)

Country Link
JP (1) JPS56123829A (en)

Also Published As

Publication number Publication date
JPH0117848B2 (en) 1989-04-03

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