Vacuum melting - pressure pouring induction furnace

摘要

A furnace in the invention comprises an induction melting furnace (4) housed in an air-tight container (5) which can be pressurized to the desired level of maximum allowable pressure and can be vacuum evacuated to a desired level of pressure; a vacuum melting furnace cover (9) having a vacuum evacuating pipe (12); and a pressure pouring furnace cover (25), which has a pressure piping to impress the pouring pressure controlled by a pouring pressure control device (100) onto the inside of the furnace and has a pouring siphon (32), which has its lower end opened to the bottom part within said induction melting furnace and has its upper end connected to a pouring chamber (31) having a pouring nozzle (33), penetrated therethrough. In the furnace with said construction, the molten metal having been vacuum molten in the induction melting furnace (4) within the air-tight container (5), which has been tightly closed with said vacuum melting furnace cover (9) and has been vacuum evacuated with the vacuum evacuating pipe (12), can be poured from the pouring nozzle (33) using said pouring siphon (32) by replacing said vacuum melting furnace cover (9) with said pressure pouring furnace cover (25) and impressing the pressure from the pressure piping to the inside of the air-tight container, which has been tightly closed by said pressure pouring furnace cover, to the maximum allowable pressure.