JPS57103904A - Pressure increasing device - Google Patents

Pressure increasing device

Info

Publication number
JPS57103904A
JPS57103904A JP55178016A JP17801680A JPS57103904A JP S57103904 A JPS57103904 A JP S57103904A JP 55178016 A JP55178016 A JP 55178016A JP 17801680 A JP17801680 A JP 17801680A JP S57103904 A JPS57103904 A JP S57103904A
Authority
JP
Japan
Prior art keywords
change
cylinder
pressure increasing
mold
over 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
JP55178016A
Other languages
Japanese (ja)
Inventor
Yoshinobu Nakamura
Toshiaki Tsuruma
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.)
Sumitomo Heavy Industries Ltd
Original Assignee
Sumitomo 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 Sumitomo Heavy Industries Ltd filed Critical Sumitomo Heavy Industries Ltd
Priority to JP55178016A priority Critical patent/JPS57103904A/en
Publication of JPS57103904A publication Critical patent/JPS57103904A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To get a necessary mold opening force properly without changing an existing mold fastening cylinder by a method wherein pressure increasing device is partially added to the already existing hydraulic circuit in the pressure increasing device of toggle type mold fastening machine, etc.
CONSTITUTION: The retractable side of the rod of a double acting cylinder 6 is provided with the pressure oil through the intermediare of change over valve 7 from hydraulic source 12, and when the oil at extruding side of the rod is put back in a tank 10 through change-over valves 8, 9, a cylinder 6 acts contractively and a movable platen 3 is opened toward the left through toggle mechanism 4. On the other hand, the mold closing is performed by a reverse operation to the above, and when the change-over valve 9 is switched to release a block toward the tank 10 as well as connecting between P-B by switching the change-over valve 8 from the state of the mold closing, the mold fastening is performed. In this case, the necessary purpose can be attained by arranging a check valve 16 in the midway of hydraulic supply pipe, and arranging a change- over valve 14 and a pressure increasing cylinder 15.
COPYRIGHT: (C)1982,JPO&Japio
JP55178016A 1980-12-18 1980-12-18 Pressure increasing device Pending JPS57103904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55178016A JPS57103904A (en) 1980-12-18 1980-12-18 Pressure increasing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55178016A JPS57103904A (en) 1980-12-18 1980-12-18 Pressure increasing device

Publications (1)

Publication Number Publication Date
JPS57103904A true JPS57103904A (en) 1982-06-28

Family

ID=16041087

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55178016A Pending JPS57103904A (en) 1980-12-18 1980-12-18 Pressure increasing device

Country Status (1)

Country Link
JP (1) JPS57103904A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60211103A (en) * 1984-03-23 1985-10-23 ハスコ　インタ−ナシヨナル　インコ−ポレイテツド Combination valve having double pressure vent structure
JP2009006390A (en) * 2007-06-29 2009-01-15 Toshiba Mach Co Ltd Cylinder device and molding machine
CN110573750A (en) * 2017-04-28 2019-12-13 Smc 株式会社 Supercharging device and cylinder device provided with same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60211103A (en) * 1984-03-23 1985-10-23 ハスコ　インタ−ナシヨナル　インコ−ポレイテツド Combination valve having double pressure vent structure
JP2694637B2 (en) * 1984-03-23 1997-12-24 ハスコ インターナショナル インコーポレイテッド Combination valve with double pressure relief structure
JP2009006390A (en) * 2007-06-29 2009-01-15 Toshiba Mach Co Ltd Cylinder device and molding machine
CN110573750A (en) * 2017-04-28 2019-12-13 Smc 株式会社 Supercharging device and cylinder device provided with same

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