JPS56111562A - High-pressure solidifying casting apparatus having double plungers - Google Patents

High-pressure solidifying casting apparatus having double plungers

Info

Publication number
JPS56111562A
JPS56111562A JP1371580A JP1371580A JPS56111562A JP S56111562 A JPS56111562 A JP S56111562A JP 1371580 A JP1371580 A JP 1371580A JP 1371580 A JP1371580 A JP 1371580A JP S56111562 A JPS56111562 A JP S56111562A
Authority
JP
Japan
Prior art keywords
pressure
side plunger
outer side
molten metal
die
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
JP1371580A
Other languages
Japanese (ja)
Inventor
Norihisa Fujii
Shogo Morimoto
Katsutoshi Nozawa
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1371580A priority Critical patent/JPS56111562A/en
Publication of JPS56111562A publication Critical patent/JPS56111562A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To enable to hold the inside of a casting under high pressure by providing an outer side plunger which forces molten metal into a die, and an inner side plunger which prevents the pressure drop in the casting caused by cooling.
CONSTITUTION: The molten metal for one shot is supplied to a sprue 5, and the pressure oil passed through a change-over valve 10 is supplied to the pressure oil port (a) of an outer side cylinder 3 via a pressure control valve 12 and a pilot check valve 14, whereby an outer side plunger 4 is pushed and the molten metal is sent into a die 6. Since an inner side plunger 8 is mounted to an outer side plunger 4, the molten metal is pushed simultaneously. In this state, the pressure in the die 6 rises. When this pressure reaches a specified value, it is detected with a pressure switch 15 which in turn operates a change-over valve 11. The pressure oil passed through the change-over valve 11 is supplied from the pressure oil port (c) of the inner side cylinder 7 via a pressure control vavle 13, so that the inner side plunger 8 is operated. Here, even if the pressure of the inner side plunger 8 is higher than the pressure of the outer side plunger 4, the outer side plunger 4 is prevented from retreating by a pilot check valve 13.
COPYRIGHT: (C)1981,JPO&Japio
JP1371580A 1980-02-08 1980-02-08 High-pressure solidifying casting apparatus having double plungers Pending JPS56111562A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1371580A JPS56111562A (en) 1980-02-08 1980-02-08 High-pressure solidifying casting apparatus having double plungers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1371580A JPS56111562A (en) 1980-02-08 1980-02-08 High-pressure solidifying casting apparatus having double plungers

Publications (1)

Publication Number Publication Date
JPS56111562A true JPS56111562A (en) 1981-09-03

Family

ID=11840932

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1371580A Pending JPS56111562A (en) 1980-02-08 1980-02-08 High-pressure solidifying casting apparatus having double plungers

Country Status (1)

Country Link
JP (1) JPS56111562A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5985357A (en) * 1982-07-09 1984-05-17 Akebono Brake Ind Co Ltd Device and method for low pressure casting
CN110953220A (en) * 2019-12-24 2020-04-03 一汽解放汽车有限公司 Control valve oil hole testing device and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5985357A (en) * 1982-07-09 1984-05-17 Akebono Brake Ind Co Ltd Device and method for low pressure casting
CN110953220A (en) * 2019-12-24 2020-04-03 一汽解放汽车有限公司 Control valve oil hole testing device and method

Similar Documents

Publication Publication Date Title
JPS56111562A (en) High-pressure solidifying casting apparatus having double plungers
JPS5680504A (en) Brake device for single-acting cylinder
JPS56144855A (en) Method and device for two-stage die casting under reduced pressure
JPS53134175A (en) Fluid pressure control valve for two brake systems
JPS55115603A (en) Pressure-compensation controlling system for electro- hydraulic servo pressurizing apparatus
JPS56119659A (en) High-pressure solidifying casting device
JPS562268A (en) Hydraulic brake gear of agricultural vehicle
JPS57179404A (en) Cylinder device
JPS56119658A (en) High-pressure solidifying casting device
JPS62259653A (en) Venting device for die
DE3161158D1 (en) Arrangement for die casting metals and alloys
JPS56168952A (en) Casting equipment
JPS57202956A (en) Intensifier in injection device for die casting machine
JPS5646103A (en) Cushion for oil hydraulic cylinder
JPS5759733A (en) Injection molding machine
JPS57171559A (en) Pressure casting method
JPS5743002A (en) Automatic speed changeover valve for two-speed motor
JPS63154253A (en) Injection molding device
JPS5739072A (en) Method and device for die casting
JPS58128256A (en) Method and device for discriminating defectiveness and non-defectiveness of injection molded product in injection molding machine
JPS5527510A (en) Apparatus for accumulating pressure in accumulator
JPS6124362Y2 (en)
JPS5725272A (en) Method and apparatus for controlling injection pressure of injection forming machine
JPS57101102A (en) Mechanical brake operation controller for oil hydraulic motor
JPS5794463A (en) Casting device