JPS5795430A - Injection and compression molding machine - Google Patents

Injection and compression molding machine

Info

Publication number
JPS5795430A
JPS5795430A JP17238580A JP17238580A JPS5795430A JP S5795430 A JPS5795430 A JP S5795430A JP 17238580 A JP17238580 A JP 17238580A JP 17238580 A JP17238580 A JP 17238580A JP S5795430 A JPS5795430 A JP S5795430A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
compression
metallic mold
piston
allowance
fixed
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
JP17238580A
Inventor
Akitake Ito
Shunsuke Matsuda
Original Assignee
Matsushita Electric Ind 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

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/46Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/56Means 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
    • B29C45/561Injection-compression moulding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/46Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/56Means 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
    • B29C45/561Injection-compression moulding
    • B29C2045/5615Compression stroke, e.g. length thereof

Abstract

PURPOSE:To form products by injection and compression with large thickness such as lens by providing a piston for setting up compression allowance on the side of a fixed metallic mold. CONSTITUTION:A piston 16 for setting up a compression allowance that is provided on the side of a fixed metallic mold 10 is advanced by a desired compression allowance alpha and fixed. Then a mold tightening cylinder is actuated to make the tip of said piston 16 contact a movable metallic mold 20. Next, after molten resin is injected into a cavity that is formed by cores 12 and 21 and the gate section is sealed naturally or forcibly, the piston 16 is made to retreat to the right and the fixed metallic mold 10 and movable metallic mold 20 are closed tight to compress the resin in the cavity by the amount corresponding to the compression allowance alpha. Because the resin is compressed by the force to tighten the molds, the pressure is high and because the compression allowance can be set up accurately, there is no possibility to give products over-compression or under-compression.
JP17238580A 1980-12-05 1980-12-05 Injection and compression molding machine Pending JPS5795430A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17238580A JPS5795430A (en) 1980-12-05 1980-12-05 Injection and compression molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17238580A JPS5795430A (en) 1980-12-05 1980-12-05 Injection and compression molding machine

Publications (1)

Publication Number Publication Date
JPS5795430A true true JPS5795430A (en) 1982-06-14

Family

ID=15940930

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17238580A Pending JPS5795430A (en) 1980-12-05 1980-12-05 Injection and compression molding machine

Country Status (1)

Country Link
JP (1) JPS5795430A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4519763A (en) * 1982-03-29 1985-05-28 Matsushita Electric Industrial Co., Ltd. Apparatus for injection compression molding
JPS60159021A (en) * 1984-01-31 1985-08-20 Alps Electric Co Ltd Mold for producing plastic lens
NL1012165C2 (en) * 1999-05-27 2000-11-28 Axxicon Moulds Eindhoven Bv Injection mold assembly with adjustable distance between the mold parts.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4519763A (en) * 1982-03-29 1985-05-28 Matsushita Electric Industrial Co., Ltd. Apparatus for injection compression molding
JPS60159021A (en) * 1984-01-31 1985-08-20 Alps Electric Co Ltd Mold for producing plastic lens
NL1012165C2 (en) * 1999-05-27 2000-11-28 Axxicon Moulds Eindhoven Bv Injection mold assembly with adjustable distance between the mold parts.

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