Apparatus for producing a die cast of a complicated shape

Details Apparatus for producing a die cast of a complicated shape Apparatus for producing a die cast of a complicated shape

1974-12-16

1976-08-31

Husar, Francis S.

Metal founding

Means to apply vacuum directly to work or to hold or...

Means applying vacuum or suction directly to molten casting...

B22D 2716

Patent

active

039774627

ABSTRACT:
A molding arrangement to produce a die cast of a complicated shape by using an air-evacuated, air-tight work chamber. The chamber has a crucible and a mold, and an inert gas is used. An arc is generated and the electric resistance of the inert gas is broken between a pair of electrodes provided in the chamber by oscillating a high frequency current from a high frequency oscillator circuit connected outside the chamber. The metal material is melted in the crucible by the arc, while supplying the inert gas and using discharging gas generated from the metal. When the metal is melted the injection of inert gas into the chamber is stopped, so as to make the chamber a vacuum. The furnace, which includes the chamber, is rotated and the melt in the crucible is transferred into the mold. The melt is then forced to reach every corner in the mold by the pressure of the inert gas which is injected again into the chamber.

REFERENCES:
patent: 2125080 (1938-07-01), Merrick
patent: 2171778 (1939-09-01), Yantis
patent: 2829408 (1958-04-01), Shuck
patent: 2966709 (1961-01-01), Ruppel
patent: 3005232 (1961-10-01), Steinbock
patent: 3199158 (1965-08-01), Rigatti-Luchini
patent: 3280434 (1966-10-01), Cecere
patent: 3519061 (1970-07-01), Dunlop
patent: 3666919 (1972-05-01), Thiel

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