Sealed chamber die castings of metal matrix components

Details Sealed chamber die castings of metal matrix components Sealed chamber die castings of metal matrix components

1991-10-08

1994-07-19

Bradley, P. Austin

Metal founding

Process

Shaping liquid metal against a forming surface

164 61, 164137, 164337, B22D 1914

Patent

active

053299833

ABSTRACT:
The present invention pertains to an apparatus for casting which includes a melt chamber within which a metal is disposed. The melt chamber includes means for melting the material. A mold chamber is disposed beneath the melt chamber comprised of a mold defining a mold cavity within which the metal is formed and a preform is disposed. There is also a riser cavity fluidically connected to the mold cavity for holding a charge of melted metal. There is also provided means for fluidically connecting the melt chamber to the mold chamber and a valve element for controlling the flow of metal through the connecting means such that when the connecting means is opened, the chambers are fluidically connected and when the connecting means is closed, the chambers are fluidically isolated. The mold chamber has means for evacuating the mold chamber and means for pressurizing the mold chamber such that the melted metal disposed within the riser cavity is forced into the preform. In a preferred embodiment, the mold is comprised of separable mold halves and there are included, within the mold chamber, means to mechanically separate the mold halves such that the metal is ejected therefrom. In a preferred embodiment, the bottom of the mold halves are thermally connected to a water cooled chill member for directionally solidifying the melted metal.

REFERENCES:
patent: 3547180 (1970-12-01), Cochran
patent: 3677332 (1972-07-01), Smiernow
patent: 4205717 (1980-06-01), Smith
patent: 4340109 (1982-07-01), Roddy
patent: 4995444 (1991-02-01), Jolly
patent: 5113925 (1992-05-01), Cook
patent: 5183096 (1993-02-01), Cook

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