Patent ID: 7104309
Filing Date: 2006-09-12
Classification: B22D

Abstract:
1. A deoxidation casting machine, 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, the casting machine 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; an arrangement supplying at least a metallic gas into the cavity of the casting die before the molten metal is poured into the cavity; and pressing means for pressing the molten metal in the feeder head, which is not solidified, toward the cavity when the molten metal in the cavity is solidified so as to make an outline of a cast product correspond to that of a desired product, wherein the cavity has a thermal conductivity which produces a cooling rate of the molten metal in the cavity to be 500° C./min. or more and the feeder head has a thermal conductivity which provides a cooling rate of the molten metal in the feeder head to be less than 500° C./min.