| 摘要 |
PROBLEM TO BE SOLVED: To shorten a series of manufacturing time of a turbine impeller 1 by greatly reducing time necessary for finishing process of a mold body 1S. SOLUTION: A mold body 1F similar to a shape before finishing is molded by injecting mixture of metal powder and binder into a cavity 37 of an injection molding die 19, binder contained in the mold body 1F is removed, and a mold body 1S of the shape before finishing is prepared by sintering the mold body 1F. The mold body 1S is finished in a finish shape of an impeller 1 by forging a section 11S corresponding to an outer edge of a blade and a section 7S corresponding to a fitting hole of a wheel of the mold body 1S. COPYRIGHT: (C)2011,JPO&INPIT
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