JPS56133147A - Injection device of injection molding machine - Google Patents

Injection device of injection molding machine

Info

Publication number
JPS56133147A
JPS56133147A JP3107680A JP3107680A JPS56133147A JP S56133147 A JPS56133147 A JP S56133147A JP 3107680 A JP3107680 A JP 3107680A JP 3107680 A JP3107680 A JP 3107680A JP S56133147 A JPS56133147 A JP S56133147A
Authority
JP
Japan
Prior art keywords
oil
valve
shock
injection
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
JP3107680A
Other languages
Japanese (ja)
Inventor
Toshio Ban
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.)
Meiki Seisakusho KK
Original Assignee
Meiki Seisakusho KK
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 Meiki Seisakusho KK filed Critical Meiki Seisakusho KK
Priority to JP3107680A priority Critical patent/JPS56133147A/en
Publication of JPS56133147A publication Critical patent/JPS56133147A/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

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 prevent oil pressure shock when switched to secondary injection pressure in an oil feed circuit of an injection device with various sizes of discharging pumps by setting an anti-shock valve in the vent circuit of the relief valve. CONSTITUTION:Relief valve 18 which unloads the oil in the large type discharging pump 7 is set in an oil feed circuit with various size of discharging pumps 7, 6 which feed oil to the injection cylinder 3 of an injection device which consists of heating tube 1, screw 2 and injection cylinder 3, etc. Anti-shock valve 19 which connects and disconnects the pilot-pressure flow is set in the circuit which leads to the vent hole of the valve 18. In a room (a) of the anti-shock valve 19, a throttle is provided. Thus, when switched to the secondary injection pressure, oil which is discharged through relief valve 18 to the tank does not flow out rapidly because of the contraction of room (a) of the anti-shock valve 19, preventing outbreak of oil shock.
JP3107680A 1980-03-11 1980-03-11 Injection device of injection molding machine Pending JPS56133147A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3107680A JPS56133147A (en) 1980-03-11 1980-03-11 Injection device of injection molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3107680A JPS56133147A (en) 1980-03-11 1980-03-11 Injection device of injection molding machine

Publications (1)

Publication Number Publication Date
JPS56133147A true JPS56133147A (en) 1981-10-19

Family

ID=12321337

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3107680A Pending JPS56133147A (en) 1980-03-11 1980-03-11 Injection device of injection molding machine

Country Status (1)

Country Link
JP (1) JPS56133147A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5443782A (en) * 1992-09-29 1995-08-22 Nissei Plastic Industrial Co., Ltd. Method of shortening a rising time of each injection-molding operation in association with controlling of injection-molding speed

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5078778A (en) * 1973-11-16 1975-06-26
JPS50138270A (en) * 1974-04-20 1975-11-04

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5078778A (en) * 1973-11-16 1975-06-26
JPS50138270A (en) * 1974-04-20 1975-11-04

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5443782A (en) * 1992-09-29 1995-08-22 Nissei Plastic Industrial Co., Ltd. Method of shortening a rising time of each injection-molding operation in association with controlling of injection-molding speed

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