| 摘要 |
PROBLEM TO BE SOLVED: To facilitate easy demolding of a scroll base body and to extend the life of a die by increasing the profits of capability of near net shape molding and an H/T ratio, in manufacturing a scroll part by a semi-melting/semi-solidification die casting molding method. SOLUTION: In this method of manufacturing the scroll part, the scroll base body 126 is manufactured by the semi-melting/semi-solidification die casting molding method using the die 80 with draft in a scroll base body manufacturing process. In a cutting process, the tip end of a part 126b (hereafter referred to as a "spiral wall part") corresponding to the spiral groove part 821 of the scroll base body and part 126a corresponding to the plate-like space part 801 of the scroll base body are cut by 1.0 mm or narrower in a height direction and the scroll base body is cut so that the width of the spiral wall part becomes even in the height direction. COPYRIGHT: (C)2011,JPO&INPIT
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