| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize a rotary tapping type casting apparatus in which a crucible is inversely rotated to tap molten metal subjected to vacuum melting into a mold. SOLUTION: The casting apparatus comprises: a levitation melting furnace 4 in which the outside of a water-cooled metal crucible 1 is provided with a coil 2, and tapping is performed from an opening 3 at the upper face by inversion rotation; a mold 6 connected to the upper face of the crucible 1 so that a sprue 5 faces the opening 3; and a vacuum exhaust system vacuum-exhausting the crucible 1 and the mold 6, wherein a sealing vessel 13 is arranged between the crucible 1 and the coil 2 so as to seal the crucible 1, and the crucible 1 is airtightly connected to the mold 6 sealed by a sealing vessel 16. Not the whole bodies of the levitation melting furnace 4 and the mold 6 are stored into the sealing vessels, but, only the crucible 1 is sealed by the sealing vessel 13 in the levitation melting furnace 4, and the crucible 1 is airtightly connected to the mold to attain the sealing of the crucible 1 and the mold 6, thus the volumes of the sealing vessels 13 and 16 are minimized, and the apparatus can be miniaturized. COPYRIGHT: (C)2005,JPO&NCIPI
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