JPS5765404A - Hydraulic circuit device and control method thereof - Google Patents

Hydraulic circuit device and control method thereof

Info

Publication number
JPS5765404A
JPS5765404A JP14015780A JP14015780A JPS5765404A JP S5765404 A JPS5765404 A JP S5765404A JP 14015780 A JP14015780 A JP 14015780A JP 14015780 A JP14015780 A JP 14015780A JP S5765404 A JPS5765404 A JP S5765404A
Authority
JP
Japan
Prior art keywords
valve
shifted
hand position
flow
control servo
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
JP14015780A
Other languages
Japanese (ja)
Inventor
Toshimasa Sakamoto
Yutaka Shibata
Hisashi Takada
Katsuyuki Yoshikawa
Yuichi Ando
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel 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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP14015780A priority Critical patent/JPS5765404A/en
Publication of JPS5765404A publication Critical patent/JPS5765404A/en
Pending legal-status Critical Current

Links

Landscapes

  • Fluid-Pressure Circuits (AREA)
  • Continuous Casting (AREA)

Abstract

PURPOSE: To prevent initial rapid downward movement in particular, through a device for controling the operating speed of a hydraulic actuator, by causing oil to flow into a flow meter and a flow control servo valve to obtain a required flow rate signal to start operating the hydraulic actuator.
CONSTITUTION: When a hydraulic cylinder 1 which is adequate to pull a solidifying ingot down from a mold by the head of a dummy bar in the semicontinuous casting of aluminum or the like is to be driven downward, a first changeover valve 9 is shifted to a left-hand position, a flow control servo valve 16 is shifted to a right- hand position and a third changeover valve 15 is shifted to a right-hand position to conduct pressurized oil from the valve 9 to a passage 30 through the valve 15. At that time, a pilot check valve 21 remains closed by a back pressure because pilot pressure is released by the valve 15. For that reason, the pressurized oil returns through a counterbalance valve 22, a flow meter 23 and the flow control servo valve 16. After that, the valve 15 is shifted to a left-hand position to open the check valve 21 to move the hydraulic cylinder 1 downward.
COPYRIGHT: (C)1982,JPO&Japio
JP14015780A 1980-10-06 1980-10-06 Hydraulic circuit device and control method thereof Pending JPS5765404A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14015780A JPS5765404A (en) 1980-10-06 1980-10-06 Hydraulic circuit device and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14015780A JPS5765404A (en) 1980-10-06 1980-10-06 Hydraulic circuit device and control method thereof

Publications (1)

Publication Number Publication Date
JPS5765404A true JPS5765404A (en) 1982-04-21

Family

ID=15262187

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14015780A Pending JPS5765404A (en) 1980-10-06 1980-10-06 Hydraulic circuit device and control method thereof

Country Status (1)

Country Link
JP (1) JPS5765404A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5263400A (en) * 1991-03-11 1993-11-23 Heilmeier & Weinlein Fabrik Fuer Oel-Hydraulik Gmbh & Co. Kg Hydraulic control device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5263400A (en) * 1991-03-11 1993-11-23 Heilmeier & Weinlein Fabrik Fuer Oel-Hydraulik Gmbh & Co. Kg Hydraulic control device

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