JPS56155732A - Hydraulic control circuit for injection molding machine - Google Patents

Hydraulic control circuit for injection molding machine

Info

Publication number
JPS56155732A
JPS56155732A JP5966480A JP5966480A JPS56155732A JP S56155732 A JPS56155732 A JP S56155732A JP 5966480 A JP5966480 A JP 5966480A JP 5966480 A JP5966480 A JP 5966480A JP S56155732 A JPS56155732 A JP S56155732A
Authority
JP
Japan
Prior art keywords
injection
capacity pump
hydraulic control
pressure
mold
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
JP5966480A
Other languages
Japanese (ja)
Other versions
JPH0225042B2 (en
Inventor
Masami Hara
Hiroshi Sugano
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 JP5966480A priority Critical patent/JPS56155732A/en
Publication of JPS56155732A publication Critical patent/JPS56155732A/en
Publication of JPH0225042B2 publication Critical patent/JPH0225042B2/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
    • B29C45/82—Hydraulic or pneumatic circuits

Landscapes

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

Abstract

PURPOSE:To save consumed electric power by leading the flow of a hydraulic control valve for clamping a mold to the side of injection to employ the same for maintaining pressure for inejction and by unloading a large-capacity pump while the pressure for injection is maintained. CONSTITUTION:The secondary side of the hydraulic control valve 4 controlling a small-capacity pump 1 for maintaning the mold-clamping force of a mold-clamping cylinder 8 is led to a hydraulic circuit 33 on the side of injection through the intermediary of a pipe line 26. While filling-up for injection is conducted, oil is joined to the oil quantity of the large-capacity pump 2 for injection and mold-clamping and made to flow through a hydraulic piping 19 and an injection cylinder 16 is made to advance. During the process of maintenance of pressure, a solenoid valve 32 is nonexcited and the large-capacity pump 2 is made unloaded by a relief valve 30 to return oil to a hydraulic tank 31 under low pressure. At this time, the pressure for injection can be maintained sufficiently high since the discharge quantity of the small-capacity pump 1 is led from the pipe line 26 to the side of injection through the intermediary of the hydraulic control valve 4.
JP5966480A 1980-05-06 1980-05-06 Hydraulic control circuit for injection molding machine Granted JPS56155732A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5966480A JPS56155732A (en) 1980-05-06 1980-05-06 Hydraulic control circuit for injection molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5966480A JPS56155732A (en) 1980-05-06 1980-05-06 Hydraulic control circuit for injection molding machine

Publications (2)

Publication Number Publication Date
JPS56155732A true JPS56155732A (en) 1981-12-02
JPH0225042B2 JPH0225042B2 (en) 1990-05-31

Family

ID=13119683

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5966480A Granted JPS56155732A (en) 1980-05-06 1980-05-06 Hydraulic control circuit for injection molding machine

Country Status (1)

Country Link
JP (1) JPS56155732A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011080587A (en) * 2009-09-08 2011-04-21 Cosmo Oil Lubricants Co Ltd Hydraulic fluid power-saving effect evaluating device and power-saving effect evaluating method using the same
CN103267038A (en) * 2013-05-09 2013-08-28 洛阳理工学院 Hydraulic control loop capable of controlling multiple lifting platforms
CN104358682A (en) * 2014-10-22 2015-02-18 中国石油集团渤海钻探工程有限公司 Oil flush test device for oil pump performance test table of intelligent drilling tool
CN104775473A (en) * 2014-01-15 2015-07-15 纳博特斯克有限公司 Hydraulic circuit for construction machinery
CN107269606A (en) * 2017-07-24 2017-10-20 宜兴市宜轻机械有限公司 A kind of new minute-pressure system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011080587A (en) * 2009-09-08 2011-04-21 Cosmo Oil Lubricants Co Ltd Hydraulic fluid power-saving effect evaluating device and power-saving effect evaluating method using the same
CN103267038A (en) * 2013-05-09 2013-08-28 洛阳理工学院 Hydraulic control loop capable of controlling multiple lifting platforms
CN103267038B (en) * 2013-05-09 2017-02-08 洛阳理工学院 Hydraulic control loop capable of controlling multiple lifting platforms
CN104775473A (en) * 2014-01-15 2015-07-15 纳博特斯克有限公司 Hydraulic circuit for construction machinery
CN104358682A (en) * 2014-10-22 2015-02-18 中国石油集团渤海钻探工程有限公司 Oil flush test device for oil pump performance test table of intelligent drilling tool
CN104358682B (en) * 2014-10-22 2016-07-13 中国石油集团渤海钻探工程有限公司 Oil test set is rushed for intelligent drilling instrument oil pump performance testboard
CN107269606A (en) * 2017-07-24 2017-10-20 宜兴市宜轻机械有限公司 A kind of new minute-pressure system
CN107269606B (en) * 2017-07-24 2019-03-12 宜兴市宜轻机械有限公司 A kind of novel minute-pressure system

Also Published As

Publication number Publication date
JPH0225042B2 (en) 1990-05-31

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