Patent ID: 8286690

Claim:
A high-vacuum-suction casting apparatus for producing cast products by raising up molten metal and introducing the molten metal into a die above, comprising: (1) a holding furnace for retaining the molten metal; (2) the die arranged above the holding furnace; (3) a feeding tube for supplying the molten metal from the holding furnace to a die cavity; and (4) a horizontally movable sealing member capable of opening and closing a space between a gate provided in a bottom of the die and the outlet of the feeding tube, wherein the sealing member comprises: a) a pressure reduction vent for removing a surface portion of the molten metal, including a surface of the molten metal and some molten metal directly below the surface, sucked into the feeding tube by reducing pressure in the feeding tube; b) a depressurizing pipe for discharging aspirated gas from the pressure reduction vent to the outside; and c) an opening directly communicating the outlet of the feeding tube and the die cavity.