JPS5678959A - Hydraulic circuit of injection molding machine - Google Patents

Hydraulic circuit of injection molding machine

Info

Publication number
JPS5678959A
JPS5678959A JP15558479A JP15558479A JPS5678959A JP S5678959 A JPS5678959 A JP S5678959A JP 15558479 A JP15558479 A JP 15558479A JP 15558479 A JP15558479 A JP 15558479A JP S5678959 A JPS5678959 A JP S5678959A
Authority
JP
Japan
Prior art keywords
piston
pump
mold opening
operated
pressure
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
JP15558479A
Other languages
Japanese (ja)
Inventor
Akitaka Nagawa
Mitsuhiro Nagai
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 JP15558479A priority Critical patent/JPS5678959A/en
Publication of JPS5678959A publication Critical patent/JPS5678959A/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
    • B29C45/82—Hydraulic or pneumatic circuits
    • 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
    • B29C2045/826—Plurality of hydraulic actuators driven by one hydraulic pump

Landscapes

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

Abstract

PURPOSE:To shorten a molding cycle time by connecting a circuit of a pump emitting side and a circuit for a mold opening and closing cylinder through a sequence valve to carry out the mold opening and closing operation and the projection of a molded product in parallel by one hydraulic source. CONSTITUTION:If a predetermined cooling time is elasped after injecting and holding a pressure, a solenoid 4a of an electromagnetic switch valve 4 is operated to communicated P and A and to drain B. At the same time, a solenoid 7b is operated to communicate P and B and to drain A. A pressurized oil is entered into a left side of a piston 8a from a pump 1 to move the piston 8a to a right direction. Because the emitting capacity of the pump is higher compared to the pressurized oil necessary for operating an ejector cylinder 8, the sequence valve 5 set to a pressure lower than that of a relief valve 2 is operated immediately and oil pressure is entered into the mold opening and closing cylinder 9 through a float control value 6, P and B to move a piston 9a to a left direction.
JP15558479A 1979-12-03 1979-12-03 Hydraulic circuit of injection molding machine Pending JPS5678959A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15558479A JPS5678959A (en) 1979-12-03 1979-12-03 Hydraulic circuit of injection molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15558479A JPS5678959A (en) 1979-12-03 1979-12-03 Hydraulic circuit of injection molding machine

Publications (1)

Publication Number Publication Date
JPS5678959A true JPS5678959A (en) 1981-06-29

Family

ID=15609232

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15558479A Pending JPS5678959A (en) 1979-12-03 1979-12-03 Hydraulic circuit of injection molding machine

Country Status (1)

Country Link
JP (1) JPS5678959A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200009878A (en) * 2018-07-20 2020-01-30 주식회사 유도 Valve pin adjuster cylinder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200009878A (en) * 2018-07-20 2020-01-30 주식회사 유도 Valve pin adjuster cylinder

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