JPS5491688A - Hydraulic circuit of mold pressing device - Google Patents

Hydraulic circuit of mold pressing device

Info

Publication number
JPS5491688A
JPS5491688A JP15898577A JP15898577A JPS5491688A JP S5491688 A JPS5491688 A JP S5491688A JP 15898577 A JP15898577 A JP 15898577A JP 15898577 A JP15898577 A JP 15898577A JP S5491688 A JPS5491688 A JP S5491688A
Authority
JP
Japan
Prior art keywords
port
oil
brake
high speed
brake valve
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
JP15898577A
Other languages
Japanese (ja)
Inventor
Hideo Kuroda
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP15898577A priority Critical patent/JPS5491688A/en
Publication of JPS5491688A publication Critical patent/JPS5491688A/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
    • B29C45/64—Mould opening, closing or clamping devices
    • B29C45/67—Mould opening, closing or clamping devices hydraulic

Landscapes

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

Abstract

PURPOSE:To improve a response property of brake circuit without change-over shock by performing brake operation at low speed flowing reversely the return oil for mold closing and mold opening with position change of one brake valve. CONSTITUTION:Main port 1 of brake valve 27 is joined with cross section S2, joining the main port f with the confluence of discharge oil from cross section S1 and discharge oil from pump 19. During mold closing high speed operation, the returned oil from the surface S2 flows into a tank from port e through f, g. For changing from high speed to low speed operation, when the position of brake valve 27 is changed from brake start to operation side back pressure may be applied to the returned oil from the surface S2. During mold opening high speed operation, the returned oil from the surface S1 may flow into port e, cross section surface S2 together with discharge oil from port d, e. port g. When the brake valve 27 is changed from operation to opening, the back pressure is applied to the return oil flowing to the surface S2. This enables to change from high speed to low speed.
JP15898577A 1977-12-28 1977-12-28 Hydraulic circuit of mold pressing device Pending JPS5491688A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15898577A JPS5491688A (en) 1977-12-28 1977-12-28 Hydraulic circuit of mold pressing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15898577A JPS5491688A (en) 1977-12-28 1977-12-28 Hydraulic circuit of mold pressing device

Publications (1)

Publication Number Publication Date
JPS5491688A true JPS5491688A (en) 1979-07-20

Family

ID=15683686

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15898577A Pending JPS5491688A (en) 1977-12-28 1977-12-28 Hydraulic circuit of mold pressing device

Country Status (1)

Country Link
JP (1) JPS5491688A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56110917U (en) * 1980-01-30 1981-08-27
JPS6136703U (en) * 1984-08-08 1986-03-07 内田油圧機器工業株式会社 prefill circuit device
US4811667A (en) * 1986-05-14 1989-03-14 Kabushiki Kaisha Toshiba Transportation system of a floated-carrier type
JPH02211965A (en) * 1988-10-31 1990-08-23 Toshiba Mach Co Ltd Die clamping cylinder device
JP2008051194A (en) * 2006-08-24 2008-03-06 Hokuto Kenki Service Kk Hydraulic cylinder and hydraulic drive unit
JP2011002048A (en) * 2009-06-19 2011-01-06 Kana Yasuda Hydraulic cylinder device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56110917U (en) * 1980-01-30 1981-08-27
JPS617054Y2 (en) * 1980-01-30 1986-03-04
JPS6136703U (en) * 1984-08-08 1986-03-07 内田油圧機器工業株式会社 prefill circuit device
US4811667A (en) * 1986-05-14 1989-03-14 Kabushiki Kaisha Toshiba Transportation system of a floated-carrier type
JPH02211965A (en) * 1988-10-31 1990-08-23 Toshiba Mach Co Ltd Die clamping cylinder device
US5061175A (en) * 1988-10-31 1991-10-29 Toshiba Kikai Kabushiki Kaisha Clamping cylinder system
JPH0575504B2 (en) * 1988-10-31 1993-10-20 Toshiba Machine Co Ltd
JP2008051194A (en) * 2006-08-24 2008-03-06 Hokuto Kenki Service Kk Hydraulic cylinder and hydraulic drive unit
JP2011002048A (en) * 2009-06-19 2011-01-06 Kana Yasuda Hydraulic cylinder device

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