Coating is the most critical process in the entire 5A02 aluminum plate china coil coating production line. The quality of the coating product, especially the appearance quality, directly affects the decorative effect of the product. Therefore, we must first master the common defects in the coating process and their causes.

1. Raw materials

Coating and aluminum coil are the most influential factors in the coating process. Due to the color difference between batches of paints, insufficient fineness of 5A02 aluminum plate china paint, poor coordination between paint and solvent, delamination and other reasons, the coating rate is not high. , will directly affect the coating effect and cause defects. The unevenness of the aluminum coil substrate, the uneven film thickness, and the poor edge deflection also directly affect the product quality and overall use. Therefore, the selection of raw materials should be strictly controlled.

2. Equipment

The coating line requires that the coating line equipment is in good condition, the coating line equipment runs smoothly, there is no horizontal and vertical shaking, and the coating line drum is polished smoothly. The lateral runout of all rollers of the coating machine must be controlled within the allowable range, otherwise it will seriously affect the surface quality of the coating.