To obtain the miniaturization of an apparatus and the improvement of a cast quality, in a bottom part molten metal discharging type casting apparatus for discharging the molten metal vacuum-melted from the bottom part of a crucible into a mold.
In the bottom part molten metal discharging type casting apparatus, composed of a float-up melting furnace 4 provided with a coil 2 at the outside of the water-cooled metallic crucible 1, and discharging the molten metal from a molten metal tapping hole 3 at the bottom part, the mold 6 disposed at the lower part of the water-cooled metallic crucible 1, and a vacuum-evacuating system for vacuum-evacuating the inner part of the crucible 1 and the mold 6 and melting under float-up the metal 10 in the crucible 1 by supplying the electric power into the coil 2 and casting the molten metal from the tapping hole 3 into the mold 6, the mold 6 closed with a closing vessel 15, is airtightly connected to the bottom surface of the crucible 1. A vacuum/pressurized space in the mold 6 is made to be small by performing the closing of the mold 6 with the closing vessel 15, and the responsiveness of an atmosphere control (vacuum-evacuation and pressurize-control) in the mold 6 is improved.
UEMURA HIROSHI
MATSUNAGA YASUZUMI
MORITA ARIMICHI
FUJI ELECTRIC SYSTEMS CO LTD
Yoshihide Komada
Kiyoshi Matsuzaki
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