Coated aluminum foil is formed after surface treatment on the basis of uncoated aluminum foil. In addition to the chemical composition, mechanical properties and geometric dimensions required by the above-mentioned uncoated aluminum foil, it should also have good plate shape and Coating performance.
First of all, the production process of coated aluminum foil requires the aluminum foil to have a good plate shape, which is a prerequisite for the production of coated aluminum foil. The unit for measuring plate shape indicators is I. Generally, the plate shape requirements of coating production equipment are within 20-40I. If it is greater than this value, a tension straightening system needs to be added in front of the coating equipment. Generally, the aluminum strip running routes of coating equipment are long, and there are many processing procedures and guide rollers.
Therefore, if the tension straightening system is not equipped, once the plate shape is not good, it will easily break during operation, resulting in the failure of production. The air-conditioning production process also has high requirements on the shape of aluminum foil. General heat exchanger fin punching production lines use vacuum suction cups to transport aluminum foil. If the shape of the aluminum foil is not good and the surface is uneven, the vacuum suction transport of the aluminum foil will not work properly. Therefore, the plate shape is not only an important technical indicator of coated aluminum foil, but also uncoated aluminum foil.
