JPS57105331A - Metal mold device for injection compression molding - Google Patents

Metal mold device for injection compression molding

Info

Publication number
JPS57105331A
JPS57105331A JP18427880A JP18427880A JPS57105331A JP S57105331 A JPS57105331 A JP S57105331A JP 18427880 A JP18427880 A JP 18427880A JP 18427880 A JP18427880 A JP 18427880A JP S57105331 A JPS57105331 A JP S57105331A
Authority
JP
Japan
Prior art keywords
mold
alpha
cavity
block
injection
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
JP18427880A
Other languages
Japanese (ja)
Inventor
Shunsuke Matsuda
Akitake Ito
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP18427880A priority Critical patent/JPS57105331A/en
Publication of JPS57105331A publication Critical patent/JPS57105331A/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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • B29C45/561—Injection-compression moulding

Landscapes

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

Abstract

PURPOSE:To produce an injection compression molded article free of flashes by a method wherein a block-type mold including a sprue part, a runner part and a gate part provided on the fixed mold side is so fitted that it can be moved relatively to the fixed mold. CONSTITUTION:The block-type mold 17 including the sprue part 3, the runner part 9 and the gate part 8 is so fitted that it can be moved relatively to the fixed mold 1. A compression allowance of alpha is provided at a position spaced away from the side wall of a cavity 4, the tip of an injection nozzle 20 is brought into contact with the block-type mold 17 and the mold 17 is pushed to the side of a movable mold 2. Thereafter, a molten resin is injected into the cavity 4, the movable mold 2 is moved rightwards by a distance of alpha to further compress the resin in the cavity 4, and the mold 17 is retracted by a distance of alpha. Since the parting surfaces are kept in close contact with each other both at the time of injection and at the time of compression, no flash is formed. This device is suitable for producing a plastic lens.
JP18427880A 1980-12-24 1980-12-24 Metal mold device for injection compression molding Pending JPS57105331A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18427880A JPS57105331A (en) 1980-12-24 1980-12-24 Metal mold device for injection compression molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18427880A JPS57105331A (en) 1980-12-24 1980-12-24 Metal mold device for injection compression molding

Publications (1)

Publication Number Publication Date
JPS57105331A true JPS57105331A (en) 1982-06-30

Family

ID=16150510

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18427880A Pending JPS57105331A (en) 1980-12-24 1980-12-24 Metal mold device for injection compression molding

Country Status (1)

Country Link
JP (1) JPS57105331A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60159021A (en) * 1984-01-31 1985-08-20 Alps Electric Co Ltd Mold for producing plastic lens

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60159021A (en) * 1984-01-31 1985-08-20 Alps Electric Co Ltd Mold for producing plastic lens

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