JPS5567435A - Injection of synthetic resin - Google Patents

Injection of synthetic resin

Info

Publication number
JPS5567435A
JPS5567435A JP14149778A JP14149778A JPS5567435A JP S5567435 A JPS5567435 A JP S5567435A JP 14149778 A JP14149778 A JP 14149778A JP 14149778 A JP14149778 A JP 14149778A JP S5567435 A JPS5567435 A JP S5567435A
Authority
JP
Japan
Prior art keywords
pressure
injection
hydraulic
metal mold
signal
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
JP14149778A
Other languages
Japanese (ja)
Other versions
JPS6238128B2 (en
Inventor
Kesaji Nishizawa
Original Assignee
Nissei Plastics Ind Co
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 Nissei Plastics Ind Co filed Critical Nissei Plastics Ind Co
Priority to JP53141497A priority Critical patent/JPS6238128B2/ja
Publication of JPS5567435A publication Critical patent/JPS5567435A/en
Publication of JPS6238128B2 publication Critical patent/JPS6238128B2/ja
Expired 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 prevent a metal mold from bad effects by extraordinary pressure and make reliable injection by switching injection pressure of molten resin to the metal mold to a constant pressure by the use of assigned time from the injection starting and assignment of injection cylinder hydraulic pressure or resin pressure. CONSTITUTION:When an injection signal is given in an injection cylinder 1, hydraulic pressure from a hydraulic source is supplied to the rear part of an injection cylinder through a hydraulic control valve 5 and fills melted resin in a metal mold. The pressure at the rear part of the injection cylinder is changed into electric signals by a pressure detector 6 and lead into a comparator 8 for comparison with reference signals from a pressure assigning device 7. A logical product 11 is obtained from a signal 10 from a time assigning device 9 which operates together with the injection signal and a signal from the comparator 8, this output is given to the hydraulic control valve 5 and the injection cylinder is switched over from speed control to constant pressure control. Though the hydraulic pressure in the hydraulic cylinder rises and a pressure peak occurs when resin is being filled into the metal mold, injection continues if time assignment is not yet carried out.
JP53141497A 1978-11-16 1978-11-16 Expired JPS6238128B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53141497A JPS6238128B2 (en) 1978-11-16 1978-11-16

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53141497A JPS6238128B2 (en) 1978-11-16 1978-11-16

Publications (2)

Publication Number Publication Date
JPS5567435A true JPS5567435A (en) 1980-05-21
JPS6238128B2 JPS6238128B2 (en) 1987-08-17

Family

ID=15293304

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53141497A Expired JPS6238128B2 (en) 1978-11-16 1978-11-16

Country Status (1)

Country Link
JP (1) JPS6238128B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9044891B2 (en) 2011-12-02 2015-06-02 Nissei Plastic Industrial Co., Ltd. Control device of an injection molding machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5195459A (en) * 1975-02-18 1976-08-21 Netsukasoseijushiseikeisochi
JPS534867A (en) * 1976-07-03 1978-01-17 Matsushita Electric Works Ltd Circuit breaker
JPS5346360A (en) * 1976-10-08 1978-04-25 Mitsubishi Heavy Ind Ltd Method of controlling injection pressure of injection molding machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5195459A (en) * 1975-02-18 1976-08-21 Netsukasoseijushiseikeisochi
JPS534867A (en) * 1976-07-03 1978-01-17 Matsushita Electric Works Ltd Circuit breaker
JPS5346360A (en) * 1976-10-08 1978-04-25 Mitsubishi Heavy Ind Ltd Method of controlling injection pressure of injection molding machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9044891B2 (en) 2011-12-02 2015-06-02 Nissei Plastic Industrial Co., Ltd. Control device of an injection molding machine

Also Published As

Publication number Publication date
JPS6238128B2 (en) 1987-08-17

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