PURPOSE: To sharply improve heating efficiency by oppositely arranging a high- frequency induction heating coil on a thin casting ingot having an upper face with a wide area, and melting the ingot via the high-frequency induction heating action.

CONSTITUTION: A casting ingot 3 made of Ti or Ti alloy and having a disk- shaped upper face 3a with a wide area is stored in the recess 12 of a crucible 1 and mounted on the bottom face of the recess 12. A lifting means 16 is operated to lower a high-frequency induction heating coil 13, and a heating section 13a is oppositely arranged at the position slightly apart from the upper face 3a of the ingot 3. A high-frequency current is fed to the high frequency induction heating coil 13 from a high-frequency power source 15, thereby the ingot 3 is heated and melted. The heating coil 13 is lifted after melting, a motor 11 is driven, thereby a rotary arm 5 is rotated at a high speed centering a rotary shaft 9 together with the crucible 1 and a die 2. The molten metal in the recess 12 in the crucible 1 is filled into the die by the centrifugal force, and it is naturally cooled to obtain a cast component with the preset shape.