JPS56159136A - Method and apparatus for controlling injection of injection molder - Google Patents

Method and apparatus for controlling injection of injection molder

Info

Publication number
JPS56159136A
JPS56159136A JP6451780A JP6451780A JPS56159136A JP S56159136 A JPS56159136 A JP S56159136A JP 6451780 A JP6451780 A JP 6451780A JP 6451780 A JP6451780 A JP 6451780A JP S56159136 A JPS56159136 A JP S56159136A
Authority
JP
Japan
Prior art keywords
port
hydraulic
injection
pressure
injection cylinder
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
JP6451780A
Other languages
Japanese (ja)
Inventor
Toshio Inami
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.)
Japan Steel Works Ltd
Original Assignee
Japan Steel Works 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 Japan Steel Works Ltd filed Critical Japan Steel Works Ltd
Priority to JP6451780A priority Critical patent/JPS56159136A/en
Publication of JPS56159136A publication Critical patent/JPS56159136A/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
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material

Abstract

PURPOSE:To smoothly perform the change-over from rate control in the injection step to pressure control in the follow-up pressure, by inputting an output signal from a previous amplifier selectively into a torque motor to control the rate of a screw and the pressure of the injection cylinder. CONSTITUTION:In a hydraulic controlling valve a, by driving a power amplifier b, the opening between a port P and a port B, and the port B and a port T, that is, the opening of throttles C3, C4 can be varied, and thus the controlled hydraulic pressure is led from the port B to an injection cylinder g to drive the screw j. When the rate control is required, the control mode change-over switch h has been switched to be connected to the previous amplifier c in advance. The hydraulic oil entered into the port P of a hydraulic controlling valve a from a main hydraulic source i is divided into a hydraulic stream that flows from the port T to a tank m and a hydraulic stream that flows from the port B to the injection cylinder g. Accordingly when the torque motor M of the hydraulic controlling valve a is driven by the power amplifier b, the displacement rate of the screw j connected to the injection cylinder g can be varied.
JP6451780A 1980-05-14 1980-05-14 Method and apparatus for controlling injection of injection molder Pending JPS56159136A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6451780A JPS56159136A (en) 1980-05-14 1980-05-14 Method and apparatus for controlling injection of injection molder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6451780A JPS56159136A (en) 1980-05-14 1980-05-14 Method and apparatus for controlling injection of injection molder

Publications (1)

Publication Number Publication Date
JPS56159136A true JPS56159136A (en) 1981-12-08

Family

ID=13260475

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6451780A Pending JPS56159136A (en) 1980-05-14 1980-05-14 Method and apparatus for controlling injection of injection molder

Country Status (1)

Country Link
JP (1) JPS56159136A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59103003A (en) * 1982-11-22 1984-06-14 ロ−ド・コ−ポレ−シヨン Hydraulic-pneumatic type drive
JPS59175604A (en) * 1983-03-19 1984-10-04 クラウス−マツフアイ・アクチエンゲゼルシヤフト Hydraulic type controller for two or more of working piston
US4599063A (en) * 1982-02-04 1986-07-08 Klockner-Werke Aktiengesellschaft Injection molding apparatus having die closing and locking means
JPS61255286A (en) * 1985-05-07 1986-11-12 Daikin Ind Ltd Control device for variable capacity type pump
US7004224B2 (en) 2002-11-22 2006-02-28 Toyo Machinery And Metal Co., Ltd. Diecasting machine
US7159639B2 (en) 2002-11-22 2007-01-09 Toyo Machinery & Metal Co., Ltd. Diecasting machine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4599063A (en) * 1982-02-04 1986-07-08 Klockner-Werke Aktiengesellschaft Injection molding apparatus having die closing and locking means
JPS59103003A (en) * 1982-11-22 1984-06-14 ロ−ド・コ−ポレ−シヨン Hydraulic-pneumatic type drive
JPS59175604A (en) * 1983-03-19 1984-10-04 クラウス−マツフアイ・アクチエンゲゼルシヤフト Hydraulic type controller for two or more of working piston
JPS61255286A (en) * 1985-05-07 1986-11-12 Daikin Ind Ltd Control device for variable capacity type pump
US7004224B2 (en) 2002-11-22 2006-02-28 Toyo Machinery And Metal Co., Ltd. Diecasting machine
US7159639B2 (en) 2002-11-22 2007-01-09 Toyo Machinery & Metal Co., Ltd. Diecasting machine

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