| 摘要 |
PURPOSE:To blow the plating thickness in the width direction of a continuously metal hot dipped steel strip uniformly by directing one end part of gas injection slit nozzles for the purpose of blowing the excess plating metal on the surfaces of said steel strip to the edge parts of the surfaces of the steel strip. CONSTITUTION:Both surfaces of a steel strip 2 coming out from a zinc hot dipping layer 6 are blown with gas injection nozzles 8, 8, whereby th excess hot dipping metal stuck on both surfaces is removed. In this case, one nozzle 8 is made freely movable in the width direction of the strip 2 so that its one end part 15 directs the edge part of the surface of the strip 2. At the same time, the one end side of the nozzle 8 on the opposite side is made freely movable in the width direction of the strip 2 so as to direct the other edge part on the rear of the strip 2. Since the gaseous flow ejecting from the injection nozzles on the sides outer than the edge parts of the strip 2 forms one way flow without collision and is simplified, the injection pressure higher than that in the prior art is usable and the excess hot dipping metal stuck on both surfaces of the strip 2 is removed uniformly at a high speed. |
