Method for casting metal and apparatus therefor

Details Method for casting metal and apparatus therefor Method for casting metal and apparatus therefor

1996-04-25

1998-03-03

Lin, Kuang Y.

Metal founding

Process

Shaping liquid metal against a forming surface

164513, B22D 2702

Patent

active

057224811

ABSTRACT:
Molten metal melted in a levitation melting furnace is cast through a suction pipe immersed therein from above into a mold having a gas permeability in a double-structure mold chamber arranged directly above the melting furnace. The metal is levitation-melted in an inert atmosphere under atmospheric pressure. An outer mold chamber of the double-structure mold chamber is joined to the levitation melting furnace. Pressure in the outer mold chamber and in an inner mold chamber of the double-structure mold chamber and in an upper space in the levitation melting furnace is reduced to below atmospheric pressure. The suction pipe arranged in the inner mold chamber and communicating with the mold therein is immersed into the molten metal. The molten metal is cast into the mold under an increased pressure by blowing an inert gas into the upper space in the melting furnace. The inner mold chamber is raised, thereby pulling out the suction pipe from the molten metal. The outer mold chamber is raised after being returned to atmospheric pressure to separate from the melting furnace.

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