Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1998-03-24
1999-11-09
Ryan, Patrick
Metal founding
Process
Shaping liquid metal against a forming surface
164312, B22D 1700, B22D 1704
Patent
active
059795352
ABSTRACT:
The invention provides a method for injection molding a semi-molten melt of metal to a product, wherein a semi-molten melt of metal is injected into a cavity of the mold through a nozzle of injector to mold the product which is divided in a lower solid fraction portion to require strength and a higher solid fraction portion to require molding accuracy along flow of the melt inside the cavity. In the method of the invention, a part of the melt to be earlier injected is determined to be at a lower temperature in the injector than a part to be later injected among the melt parts composing said lower and higher solid portions in the cavity by injecting a batch of the melt, and that the melt is injected into the cavity on the side on which said lower solid fraction portion for the strength of the product is formed.
REFERENCES:
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patent: 5287719 (1994-02-01), Moritaka et al.
patent: 5501266 (1996-03-01), Wang et al.
patent: 5680894 (1997-10-01), Kilbert
"Thixmolding of Magnesium alloys with high solid fraction", Ken Saito et al., The proceedings of the spring conference, Society of Light Metal of Japan, pp. 3-4, 1996.
"Thixomolding process of Magnesium Alloy", Kazuo Kitamura, The Japan Steel Works, Ltd., Sokeizai, pp. 1-7, May 1995.
Patent Abstracts of Japan, Sakamoto Kazuo, Publication No, 09038758, Feb. 10, 1997 "Half-Molten Metal Injection Forming Device and Method Thereof".
K. Saito, "Thixocasting von Magnesiumlegierungen", pp. 86-91.
Ishida Kyoso
Sakamoto Kazuo
Yamamoto Yukio
Mazda Motor Corporation
Ryan Patrick
Studebaker Donald R.
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