JPS63293026A - Method and device for injection molding - Google Patents

Method and device for injection molding

Info

Publication number
JPS63293026A
JPS63293026A JP12868587A JP12868587A JPS63293026A JP S63293026 A JPS63293026 A JP S63293026A JP 12868587 A JP12868587 A JP 12868587A JP 12868587 A JP12868587 A JP 12868587A JP S63293026 A JPS63293026 A JP S63293026A
Authority
JP
Japan
Prior art keywords
strain
retainer plate
movable retainer
control
restored
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
JP12868587A
Other languages
Japanese (ja)
Inventor
Masahiko Okumura
Hiroshi Kiyono
Original Assignee
Sekisui Chem 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 Sekisui Chem Co Ltd filed Critical Sekisui Chem Co Ltd
Priority to JP12868587A priority Critical patent/JPS63293026A/en
Publication of JPS63293026A publication Critical patent/JPS63293026A/en
Pending legal-status Critical Current

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
    • B29C45/76Measuring, controlling or regulating

Abstract

PURPOSE:To improve yield of a molded product by minimizing a volumetric change of a cavity, by a method wherein an injection device is controlled based on a detected value of a quantity of a transformation of a mold so as to hold a strain of the mold at a preset value, and after gate seal a back pressure device is controlled so that the strain is restored to the original state. CONSTITUTION:A cavity 16 is formed on a mating surface between a retainer plate 12 and movable retainer plate 13 and a strain of the movable retainer plate 13 is detected by a strain gauge 5 provided on the rear side of the opposite side of the cavity 16. Then the movable retainer plate 13 is pressed from the rear side by hydraulic cylinders 61, 61 of a back pressure device 6 provided between the movable retainer plate 13 and a die plate 15, and a strain generated on the movable retainer plate 13 is restored to the original state. The strain detected by the strain gauge 5 is applied to a control part 18, the control part 18 performs feedback control of an injection device 2 until gate seal of the control part 18 is performed so that a preset strain pattern is held. Then after the gate seal has been performed, a back pressure device 6 is controlled so that the strain is restored to the original state.
JP12868587A 1987-05-26 1987-05-26 Method and device for injection molding Pending JPS63293026A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12868587A JPS63293026A (en) 1987-05-26 1987-05-26 Method and device for injection molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12868587A JPS63293026A (en) 1987-05-26 1987-05-26 Method and device for injection molding

Publications (1)

Publication Number Publication Date
JPS63293026A true JPS63293026A (en) 1988-11-30

Family

ID=14990894

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12868587A Pending JPS63293026A (en) 1987-05-26 1987-05-26 Method and device for injection molding

Country Status (1)

Country Link
JP (1) JPS63293026A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014041145A (en) * 2013-10-22 2014-03-06 Sumitomo Heavy Ind Ltd Injection molding machine
JP2017177737A (en) * 2016-03-31 2017-10-05 日精樹脂工業株式会社 Injection molding machine and method for molding the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014041145A (en) * 2013-10-22 2014-03-06 Sumitomo Heavy Ind Ltd Injection molding machine
JP2017177737A (en) * 2016-03-31 2017-10-05 日精樹脂工業株式会社 Injection molding machine and method for molding the same
CN107263833A (en) * 2016-03-31 2017-10-20 日精树脂工业株式会社 Injection moulding machine and its forming method

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