Nkk Corporation

Tokyo Yogyo Kabushiki Kaisha

Nippon Rotary Nozzle Co., Ltd.

Kokan Kikai Kogyo Kabushiki Kaisha

Mioshi Sakamoto

Tetsuya Yoshihara

Hisao Inubushi

A door opening/closing device of door-type rotary nozzle which cannot fit collector nozzle (16) unless clampers are removed. There is no possibility of pouring molten metal while forgetting to remove the clampers (25). When the fixed frame (7) is opened or closed, a ladle is fitted by a 90 degree angle with its bottom almost vertical. So, the fitting and removing operations of the clampers (25) can be performed in front of an operator, which makes the operation very easy.

Door-type rotary nozzle

A rotary nozzle in which at least one coil spring is removed, acting to increase the clearance between a surface of the bottom plate brick and a surface of the slide plate brick. This mechanism is capable of improving the pushing force in the vicinity of the nozzle hole, and prevents molten steel leakage, thus prolonging the life of expensive bricks.

Growing community of inventors

Kanagawa, Japan

Mioshi Sakamoto