| 摘要 |
PROBLEM TO BE SOLVED: To provide a vacuum die casting method in a different pressure molten metal feeding type where the feeding amount of molten metal into an injection sleeve is made certain, and stable casting is made possible. SOLUTION: In accordance with the reduction amount of a molten metal surface level detected by a molten metal surface level detection means 21, a compensation of elongating a suction time length for vacuum suction is performed, and the feeding amount of the molten metal in which the molten metal 8 is sucked from a molten metal holding furnace 9 into an injection sleeve 4 is held constant. COPYRIGHT: (C)2008,JPO&INPIT
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