JPS56117871A - Low-pressure casting method - Google Patents

Low-pressure casting method

Info

Publication number
JPS56117871A
JPS56117871A JP1989580A JP1989580A JPS56117871A JP S56117871 A JPS56117871 A JP S56117871A JP 1989580 A JP1989580 A JP 1989580A JP 1989580 A JP1989580 A JP 1989580A JP S56117871 A JPS56117871 A JP S56117871A
Authority
JP
Japan
Prior art keywords
molten metal
pressure
cavity
casting
sprue
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
JP1989580A
Other languages
Japanese (ja)
Inventor
Michio Kugue
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.)
Tokico Ltd
Original Assignee
Tokico 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 Tokico Ltd filed Critical Tokico Ltd
Priority to JP1989580A priority Critical patent/JPS56117871A/en
Publication of JPS56117871A publication Critical patent/JPS56117871A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent short run and improve productivity by detecting the pressure of the casting molten metal in the cavity in the mold and stopping the press-feeding of the molten metal by the detected value thereof in low-pressure casting with pressurizing the molten metal in the upper mold and casting the same.
CONSTITUTION: A crucible 2 containing molten metal 10 in a pressure tank 1 is set and the sprue 9 of the cavity 8 for casting of an upper mold 7 is connected to a sprue sleeve 6 by means of a conduit 5 for pouring. The conduit 5 is dipped into the molten metal 10. Compressed air is forcedly fed from a compressed air feed and exhaust pipe 11 to pressurize the surface of the molten metal 10, whereby the molten metal 10 is cast into the cavity 8 through the conduits 5, 6, and the sprue 9. At this time, the pressure of the molten metal in the cavity 8 is detected with the pressure detector 15 mounted to the inside surface of the cavity 8. When the molten metal begins to solidify, the pressure detected by the pressure detector 15 drops down to extremely low pressure and finally to zero pressures and therefore, the pressurizing of the molten metal 10 surface is stopped, whereby the short run is eliminated, and the wasteful metal in the sprue part is minimized, thus productivity is improved.
COPYRIGHT: (C)1981,JPO&Japio
JP1989580A 1980-02-20 1980-02-20 Low-pressure casting method Pending JPS56117871A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1989580A JPS56117871A (en) 1980-02-20 1980-02-20 Low-pressure casting method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989580A JPS56117871A (en) 1980-02-20 1980-02-20 Low-pressure casting method

Publications (1)

Publication Number Publication Date
JPS56117871A true JPS56117871A (en) 1981-09-16

Family

ID=12011926

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989580A Pending JPS56117871A (en) 1980-02-20 1980-02-20 Low-pressure casting method

Country Status (1)

Country Link
JP (1) JPS56117871A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8020229B2 (en) 2006-03-29 2011-09-20 Kenjiro Sato Pillow

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5378931A (en) * 1976-12-23 1978-07-12 Toyota Motor Co Ltd Method of judging coagulation of molten metal in low pressure casting and its device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5378931A (en) * 1976-12-23 1978-07-12 Toyota Motor Co Ltd Method of judging coagulation of molten metal in low pressure casting and its device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8020229B2 (en) 2006-03-29 2011-09-20 Kenjiro Sato Pillow

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