SLIDING NOZZLE DEVICE

摘要

The present invention provides a sliding nozzle device that can reduce any damage such as surface roughness and chipping in a nozzle hole surroundings of a used plate. A sliding nozzle device of the present invention includes a fixed metal frame 20, a sliding metal frame 30, and an opening and closing metal frame 40 that holds the sliding metal frame in a slidable manner, and in the sliding nozzle device in which sliding contact surfaces 33a and 46b of the sliding members 33 and 46 provided on the sliding metal frame 30 and the opening and closing metal frame 40 come in slidable contact with each other, the sliding contact surfaces 33a of the sliding member of the sliding metal frame are provided away from each other by a predetermined length front and rear in the sliding direction and a part between the front and rear sliding contact surfaces 33a serves as a depressed part 34, and the sliding contact surfaces 46a of the sliding member of the opening and closing metal frame are provided away from each other by a predetermined length front and rear in the sliding direction and a part between the front and rear sliding contact surfaces 46a serves as a depressed part 47.