To display the effect excellent in the productivity and the maintenance without fully oxidizing molten metal by adjacently arranging a pressing chamber proved with a pressing gas supplying hole and a molten metal level measuring instrument in a state where communicating to a molten metal holding chamber is possible and a molten metal shut-off valve at the communicating part between both chambers and arranging a communicating tube inclining a tube heater at the downstream side of the pressing chamber.
Dehydrated air or inert gas at about 0.2 atm. is fed into the pressing chamber 3 by closing the molten metal shut-off valve 4 from the initial state of the same molten metal surface level of the molten metal holding chamber 2, a pressing chamber 3 and a molten metal tapping hole 11, and the molten metal is filled up into the cavity in the metallic mold 13 from the molten metal tapping hole 11 through a communicating tube 5. After filling up, the pressing state is held for the fixed time, and the shrinking quantity according to the cooling of the molten metal is supplemented. After completing the casting, the molten metal by filled quantity into the metallic mold is fed into the pressing chamber 3 from a metal melting furnace by opening the molten metal shut-off valve 4, to return back the molten metal level to the initial state. The casting is continuously executed under a closing state by repeating the above operation.
OTA HARUMICHI
HIKASA YASUNAO
MOCHIZUKI SHUNJI
TONETSU KK
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