Galvanized corrugated steel plate thick edge defect solution

Adjust the shape of the lip seam of the air knife and increase the injection pressure at the edge of the plate belt. In addition, it is more important that the height of the air knife be adjusted accordingly with the speed of the production line. When the speed of the production line is low, the time for the plate strip to reach the air knife after the zinc pan is longer, the edge of the plate strip is cooled faster in the zinc liquid cooling process, and the zinc liquid begins to solidify, so when it passes through the air knife, the zinc layer on the edge will be thicker. At this time, if the height of the air knife is reduced in time to shorten the zinc liquid cooling time, this problem can be solved. When the production line speed is high, due to the increase of the air knife injection pressure, the zinc liquid splash is also large, and it is easy to block the air knife, so the height of the air knife should be raised in time.