Patent ID: 8061409
Filing Date: 2011-11-22
Classification: B22C,B22D

Abstract:
1. A mold for press molding a casting comprising: a lower horizontal mold made of sand having a concave portion that has a shape of a casting, into which portion an amount of molten metal required to produce the casting is first poured; and an upper horizontal mold made of sand having a convex portion that has a shape of the casting, the convex portion forming a cavity with the concave portion to form the casting when the upper mold is press fitted down onto and overlaps the lower mold; wherein a structure is formed between the upper and lower molds so as to have certain clearances between a press-fit portion of the lower mold and a press-fit portion of the upper mold that communicate with the concave and convex portions of the molds so that molten metal can pass into the clearances when the upper mold is press fitted down onto the lower mold to produce the casting to prevent the molten metal from leaking onto a parting plane formed where the upper mold and the lower mold overlap, the press-fit portion of the lower mold of the structure having a protruding press-fit portion protruding from the parting plane and formed along an outer circumference of the concave portion of the lower mold, and the press-fit portion of the upper mold having a groove portion, formed on the upper mold that mates with the protruding press-fit portion when the molds overlap.