Aluminum foil post-processing is a vital link for an enterprise, related to the yield of an aluminum enterprise and the profit point of the enterprise. The higher the yield, the greater the company's profit point. Of course, the yield rate must be controlled in every link, and standardized operations also require sophisticated equipment and responsible leaders and employees. I don't understand the equipment and operating specifications, so I don't dare to give any advice. I can only analyze it based on practice on the slitting knife. Next, I will talk about why slitting causes warping, polygons, and powder loss.
Apart from problems with the material itself and equipment, most of the problems of edge warping, polygons, and powder loss are related to the blade. Usually there are two main types of blades for aluminum foil slitting. One is a round blade, and the other is a blade, also called a razor. The razor blade is fixed at a fixed point and passively cuts and cuts by rewinding the material. Aluminum foil is automatically cut. The faster the speed, the smaller the resistance of the blade. Slower is the opposite. The thickness of the blade corresponds to the resistance. The thicker the blade, the greater the resistance. Thinner is the opposite. Since the razor blade is fixed for cutting, when the blade comes into contact with foil or thin materials, the cutting point is prone to fatigue and heat. Therefore, after a period of time, the blade will become less sharp. If the blade is dull, tearing will occur and powder will fall off. Rough edges are inevitable. Of course, these are also related to the cutting angle. Choosing a good razor blade is the first choice to solve these problems, and ceramic blades should be the first choice.
At present, all aluminum foil companies want to process high value-added battery foil, but the battery foil acceptance standards are very demanding. Representative lithium battery companies such as BYD, ATL, and A123 battery cell companies have strict acceptance standards for aluminum foil. The requirements for foil are extremely high, and the width, dust, and edge warping are also the most demanding. Therefore, for battery foil companies whose output is not high, the yield rate of post-processing and slitting is very important.
