The blade angle adjustment of the doctor blade coating machine is one of the factors affecting the amount of coating. At present, the blade for the glue on the anilox roller is basically a stainless steel blade. At the time of coating, the pressure exerted by the blade on the anilox roller is too small, and when there is an impurity, the blade is caused to be cracked to cause a gap, so that the coating is uneven and the coating amount is increased.
The factors affecting the blade pressure are: the hardness of the blade and the angle of the blade and the anilox roller. In actual operation, it is better to adjust the scraper with a pressure hammer, and the scraper pressure is generally about 200 to 400 kPa. The angle between the blade angle scraper and the tangential line of the anilox roller contact is generally between 15° and 30°.
If the blade angle of the doctor blade coating machine is too large, the blade is almost against the anilox roller, and the surface of the anilox roller is not smooth. When it is running at high speed, it will cause the elastic blade to vibrate or jump, so that the solution is Bounce, so be sure to control the blade angle of the doctor blade coating machine.www.xindoumachine.com