| 摘要 |
PROBLEM TO BE SOLVED: To unnecessitate the working allowance and the post-processing in the mating face of a casting. SOLUTION: A movable cavity mold 2 is constituted with an almost flat palate-like cavity base 20 and plural inserts 30, 31, 32, etc., and the mold surface 21 of the cavity base 20 is flatly formed in the same height on the divided surface 10 of the metallic mold, and in a part, recessed parts 22, 23, 24 for fitting the inserts are formed and also, the surrounding portion of the recessed part 23 for insert at the center part, is made to the mating face forming part 25. These inserts 30, 31, 32 are inserted into the recessed parts 22, 23, 24 for fitting the insert and fitted to a cavity base 20 so as to be freely attached/ detached and then, an annular space 4a is formed between the insert 31 and the other inserts 30, 32 and the annular fitting wall part can be formed. Ejector pins 12 are arranged so as to penetrate the inserts 30 and 32 and the cavity base 20, and a sprue and an overflow part are arranged at the mating part between the other insert and a fixed cavity mold 3, and the ejector pins 42 are arranged in the fixed cavity mold 3, too.
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