METHOD AND APPARATUS FOR CASTING METAL

PURPOSE:To obtain a uniform casting product in the high yield by melting a metal in a crucible having a mold cavity shape, filling up the cavity and executing the solidifying operation in this place from the bottom part of the crucible upward in order. CONSTITUTION:In the cold crucible, after evacuating and replacing with gaseous Ar in the crucible, energizing a coil 3, high frequency induction current is induced to each element constituting the crucible wall. Heat is generated in the melting material of the metal charged into the crucible 2 and the metal is melted. The molten metal is collected in the bottom of the crucible used to the mold, and the quantity is gradually increased. Then the energizing of the coil and heating are once stopped, the molten metal collected in the bottom of the water-cooled crucible used to the mold starts the solidification. By replenishing the melting material and again energizing the coil a solidliquid interface is risen according to the rise of the molten metal surface. In such a way, by using the mold having the long cavity, the long casting product is obtd.