| 摘要 |
PROBLEM TO BE SOLVED: To provide a casting technique which can prevent the deviation of a second preform. SOLUTION: As shown in Fig.(a), a first preform 12 is placed on a lower die 35. Further, a second preform 13 is adsorbed and held to the body part 42 of an upper die. At this time, a partial die part 43 is retreated to the upper part not so as to clog a suction hole 47B. Then, a prescribed amount of aluminum molten metal 59 is poured into the lower die 35. Next, as shown in (b), the upper die 40 is collectively lowered. Further, as shown in (c), the upper die 40 is progressed to the lower part, but, on the way, the partial die part 43 is lowered, and the suction hole 47B is closed. When the partial die part 43 is matched to the upper body part 42, the same is collectively progressed to the lower part, and the molten metal 59 is pressurized. Since the second preform 13 is adsorbed and held to the upper body part 42, there is no anxiety about deviation. COPYRIGHT: (C)2009,JPO&INPIT
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