STRUCTURE OF POURING NOZZLE Russian patent published in 2017 - IPC B22D41/24 B22D41/34 

FIELD: metallurgy.

SUBSTANCE: slide gate for the pouring nozzle contains a fixed metal frame 20, a sliding metal frame 30 and an opening and closing metal frame 40. The contact surfaces 33a and 46b of the sliding elements 33 and 46, installed on the metal frame 30 and the metal frame 40, are arranged at a predetermined distance from each other in front and rear in a sliding direction equal to or larger than the diameter of the nozzle opening. The contact surfaces 33a are made with a recessed part 34 and projecting parts located in front and rear of the recessed part. The contact surfaces 46a are made with a recessed part 47.

EFFECT: decreasing surface roughness and chipping in the vicinity of the pouring nozzle opening of the used plate.

6 cl, 8 dwg, 4 tbl, 1 ex