VACUUM CASTING METHOD, CASTING SYSTEM, AND SUCTION AND/OR SUPPLY DEVICE OF THE CASTING SYSTEM

摘要

[PROBLEMS] To provide a vacuum casting method for a permeable mold wherein a molten metal is filled in only a specified cavity portion by producing a highly accurate reduced pressure distribution and solidification and cooling of the molten metal is controlled in the mold. [MEANS FOR SOLVING PROBLEMS] A plurality of vent holes extending from the outer surface to the inside of the mold are formed, a plurality of pressure reduced boxes are brought into contact with the vent holes, air is sucked and/or supplied to form a plurality of partially pressure reduced zones in the mold around the vent holes to produce the specified reduced pressure distribution in the mold cavity, and the molten metal approximately equal in volume to the specified cavity portion is filled in the cavity of the mold.