Patent ID: 7278461
Filing Date: 2007-10-09
Classification: B22C,B22D

Abstract:
1. A manufacturing method for a titanium compressor wheel provided with blades, comprising: a positive pattern step of creating a positive pattern including pads with wax to be melted by heat formed in the shape of said compressor wheel such that the pads having a predetermined thickness are cast on an entire outer surface, including the blades, as a removing allowance with respect to the final complete dimensions, by means of a mold in which a plurality of movable insert dies are disposed radially so as to be concentrated on a center thereof; a casting step of creating a cast titanium product to which said positive pattern is transferred with said pads given as the removing allowance, with the positive pattern as a master form; and a removing step of removing portions corresponding to said pads of the cast titanium product obtained by the casting step entirely by cutting and/or grinding.