Patent ID: 7273085

Claim:
A deoxidation casting machine, structured and arranged for gravity casting, and in which a deoxidizing compound reacts with a molten metal so as to deoxidize an oxide film formed on a surface of the molten metal, comprising a casting die having a molten metal inlet, a cavity into which a molten metal is poured from the molten metal inlet and a feeder head provided between the molten metal inlet and the cavity, wherein rate of cooling the molten metal in the feeder head is lower than that in the cavity, and a cavity constituting member of the casting die being separable from a feeder head constituting member thereof, and the cavity constituting member, in which the molten metal is solidified, is separated from the feeder head constituting member while the molten metal in the feeder head is not solidified, wherein the cavity constituting member has a thermal conductivity which produces a cooling rate of the molten metal in the cavity to be at least 500° C./min. and the feeder head constituting member has a thermal conductivity which provides a cooling rate of the molten metal in the feeder head to be less than 500° C./min.