Method for casting material under pressure

Details Method for casting material under pressure Method for casting material under pressure

1974-03-25

1976-08-24

Shore, Ronald J.

Metal founding

Process

Shaping liquid metal against a forming surface

164136, B22D 1706

Patent

active

039761185

ABSTRACT:
In a melting furnace the melting zone is sealed off from the air and a pipe is connected to the bottom of the melt, which pipe reaches outside the furnace with its upper end to the height of the molten material inside the furnace. The casting mold is arranged on the top of the pipe. An atmosphere of protective gas is established above the surface of the molten material in the furnace; the pressure of the protective gas being controlled by a special equipment. Casting is accomplished by introducing the material to be molten through a gas lock and through the protective gas atmosphere into the melt, causing the pressure inside the furnace to increase and forcing the molten material through the rising pipe into the mold. After the mold is filled the pressure of the gas is increased in order to feed the shrinkage and to achieve a fine grained and dense casting.

REFERENCES:
patent: 1403955 (1922-01-01), Hill
patent: 2105586 (1938-01-01), Daesen et al.
patent: 2195360 (1940-03-01), Daesen
patent: 2660769 (1953-12-01), Bennett
patent: 2683294 (1954-07-01), Ennor et al.
patent: 3430685 (1969-03-01), Drugowitsch
patent: 3523570 (1970-08-01), Groteke et al.

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