B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
22/172, 22/67
B22D 17/00 (2006.01) B22D 27/11 (2006.01)
Patent
CA 1169227
ABSTRACT OF THE DISCLOSURE A die-casting method in which a molten metal is injected into a die cavity 30 through a runner 31 and the molten metal in the die cavity is pressurized and squeezed also through a squeeze passage 17 which is communicated with the die cavity 30 at a point other than the point of connection of the runner with the die cavity. The timing of commencement of the squeeze effected through the squeeze passage 17, squeezing pressure and the amount of molten metal squeezed out of the squeeze passage 17 into the die cavity 30 are suitably determined so that the formation of cavities or voids which adversely affect the strength and gas-tightness of die-cast product is remarkably decreased to assure a reliable manufacture of voidless die-cast products without substantial fluctuation of quality. The method of the invention can effectively be applied to the manufacture of die-cast products which are required to have high gas-tightness or intended for use under high pressure, and thus can be used to die-cast housings of compressors, pumps, etc.
345214
Hashimoto Shigeyoshi
Suzuki Haruo
Fetherstonhaugh & Co.
Nippondenso Co. Ltd.
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