Patent ID: 8607846
Filing Date: 2013-12-17
Classification: B22C,B22D

Abstract:
1. A molding manufacturing method comprising: providing a mold having manufacturing a preform by semimolten die casting or semisolid die casting using the mold such that the preform has a first molded portion corresponding to the first groove part and a second molded portion corresponding to the second groove part, the first molded portion having a terminal end that is connected to an adjacent, spaced part of the first molded portion by the second molded portion before removing the second molded portion; and removing the second molded portion of the preform corresponding to the second groove part such that the terminal end of the first molded portion becomes a free end that is free from connection with the adjacent, spaced part as viewed along a circumferential center of the first molded portion with the terminal end and the adjacent, spaced part of the first molded portion being separated by a gap, the gap being disposed where the second molded portion of the preform was disposed prior to removal.