JPS5757638A - Injection pressure control method - Google Patents

Injection pressure control method

Info

Publication number
JPS5757638A
JPS5757638A JP13347380A JP13347380A JPS5757638A JP S5757638 A JPS5757638 A JP S5757638A JP 13347380 A JP13347380 A JP 13347380A JP 13347380 A JP13347380 A JP 13347380A JP S5757638 A JPS5757638 A JP S5757638A
Authority
JP
Japan
Prior art keywords
pressure
relief valve
electromagnetic
valve
resin
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.)
Granted
Application number
JP13347380A
Other languages
Japanese (ja)
Other versions
JPS6134371B2 (en
Inventor
Shingo Yugawa
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.)
Shibaura Machine Co Ltd
Original Assignee
Toshiba Machine 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 Toshiba Machine Co Ltd filed Critical Toshiba Machine Co Ltd
Priority to JP13347380A priority Critical patent/JPS5757638A/en
Publication of JPS5757638A publication Critical patent/JPS5757638A/en
Publication of JPS6134371B2 publication Critical patent/JPS6134371B2/ja
Granted 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

Landscapes

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

Abstract

PURPOSE:To improve dimensional accuracy, by providing a relief valve and an electromagnetic changeover valve on a drain circuit of an injection cylinder, blocking a tank circuit of the electromagnetic valve when the operation was switched from charging process to pressure-holding process, operating the relief valve and preventing a screw from retracting. CONSTITUTION:An electromagnetic changeover valve 6 is provided on the drain side 2b of an ejecting circuit, and when it was switched from charging process to pressure-holding process a drain circuit is blocked at a position b, and hydraulic oil is made to work upon an electromagnetic relief valve 7. Resin pressure at the time of charging of a resin material storage section 10 located on the tip of a heating cylinder 5 is detected by a pressure detecting device 9, and on the basis of thus detected value a pressure which is not smaller than the detected resin pressure is calculated for setting an injection pressure controlling electromagnetic proportional relief valve 1 by a signal emitter 11, and it is made to work upon the relief valve 1 as an electrical signal. A pressure-maintaining force F to be varied by forming resin and other operating conditions is set by a pressure setting unit 8.
JP13347380A 1980-09-25 1980-09-25 Injection pressure control method Granted JPS5757638A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13347380A JPS5757638A (en) 1980-09-25 1980-09-25 Injection pressure control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13347380A JPS5757638A (en) 1980-09-25 1980-09-25 Injection pressure control method

Publications (2)

Publication Number Publication Date
JPS5757638A true JPS5757638A (en) 1982-04-06
JPS6134371B2 JPS6134371B2 (en) 1986-08-07

Family

ID=15105592

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13347380A Granted JPS5757638A (en) 1980-09-25 1980-09-25 Injection pressure control method

Country Status (1)

Country Link
JP (1) JPS5757638A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3501846A1 (en) * 1984-01-23 1985-08-01 Toshiba Kikai K.K., Tokio/Tokyo Process for controlling the injection moulding process of an injection moulding machine and device for carrying out the process
JPS63163920U (en) * 1987-04-15 1988-10-26
JPS6414016A (en) * 1987-07-08 1989-01-18 Toshiba Machine Co Ltd Method for changeover control of dwelling pressure and device therefor
CN104797397A (en) * 2012-08-24 2015-07-22 圣万提注塑工业（苏州）有限公司 Injection molding flow control apparatus and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3501846A1 (en) * 1984-01-23 1985-08-01 Toshiba Kikai K.K., Tokio/Tokyo Process for controlling the injection moulding process of an injection moulding machine and device for carrying out the process
JPS63163920U (en) * 1987-04-15 1988-10-26
JPS6414016A (en) * 1987-07-08 1989-01-18 Toshiba Machine Co Ltd Method for changeover control of dwelling pressure and device therefor
CN104797397A (en) * 2012-08-24 2015-07-22 圣万提注塑工业（苏州）有限公司 Injection molding flow control apparatus and method

Also Published As

Publication number Publication date
JPS6134371B2 (en) 1986-08-07

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