| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method for a compressor impeller, preventing cast defect in die-cast formation, implementing high aerodynamic performance, and efficiently and stably forming an inexpensive compressor impeller. SOLUTION: In the manufacturing method, a compressor impeller is made by die-cast formation, in which a hub shaft part, a hub surface, a disc surface, a hub disc part having an outer peripheral surface, cavities corresponding to a shaped of the impeller with a plurality of blade parts are partitioned and formed by a hub surface formation mold forming the hub surface and the outer peripheral surface and a disc surface formation mold forming the disc surface, and a parting line constituted of the hub surface formation mold and the disc surface formation mold has a clearance. For example, an impeller made from aluminum alloy or magnesium alloy is provided. COPYRIGHT: (C)2009,JPO&INPIT
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