Fuji Electric Co., Ltd.

Nippon Mining & Metals Co., Ltd.

Kenji Kitanaka

Takashi Shimada

Michio Kawasaki

Akio Kaneshiro

A furnace in the invention includes an induction melting furnace housed in an air-tight container 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 having a vacuum evacuating pipe; and a pressure pouring furnace cover, which has a pressure piping to impress the pouring pressure controlled by a pouring pressure control device onto the inside of the furnace and has a pouring siphon, which has its lower end opened to the bottom part within the induction melting furnace and has its upper end connected to a pouring chamber having a pouring nozzle, penetrated therethrough. In the furnace with the construction, the molten metal having been vacuum melted in the induction melting furnace within the air-tight container, which has been tightly closed with the vacuum melting furnace cover and has been vacuum evacuated with the vacuum evacuating pipe, can be poured from the pouring nozzle using the pouring siphon by replacing the vacuum melting furnace cover with the pressure pouring furnace cover and impressing the pressure from the pressure piping to the inside of the air-tight container, which has been tightly closed by the pressure pouring furnace cover, to the maximum allowable pressure.

Growing community of inventors

Kanagawa-ken, Japan

Kenji Kitanaka