Mazda Motor Corporation

Keiichiro Noguchi

Yukihiro Sugimoto

Masahiko Shibahara

Shunzo Takasuga

Motohmi Urabe

Kouichi Hori

A pressure molding method and apparatus uses a mold with a casting cavity and a pouring gate through which a molten metal is fed into the casting cavity. After feeding a molten metal into the mold through the pouring gate to fill the casting cavity and pouring gate, a cap member is placed on the mold to bring its open end into contact with a dead head of the molten metal in the pouring gate of the mold so as to form an air-tightly sealed chamber between the cap member and dead head of the molten metal. Pressure is supplied into the sealed chamber to force the molten metal in the mold through the dead head.

Pressure casting method and apparatus

A casting is formed, by compression casting, in a mold having a casting cavity which is formed by at least an outer mold die and a sand core. After feeding a molten metal into the casting cavity through a pouring gate, a compressive pressure, maintained at a lower extreme of approximately 2.5 atmospheres, is applied to the molten metal through the pouring gate in an early stage of solidification of the molten metal. The compressive pressure is varied, either gradually or quickly, to an upper extreme of approximately 10 atmospheres as the solidifcation of the molten metal progresses past an early stage of solidification, and is at this time applied to the solidifying molten metal through the sand core.

Compression casting method and apparatus therefor

Porous material of metal is held in a die and molten aluminum alloy is introduced into the die to surround the porous material. Thus, high-pressure squeeze casting is accomplished under an applied pressure of not lower than 400 Kg/cm.sup.2 to form an aluminum alloy casting stock with the porous material cast therein. The casting stock is heated to and maintained at 450.degree. to 550.degree. C. for 1 to 10 hours, and an intermetallic compound layer of aluminum and the metal of the porous material is thereby formed on the boundary between the porous material and the aluminum alloy.

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Hiroshima, Japan

Keiichiro Noguchi