Coating is an important process in the manufacturing process of aluminium painted sheet. The quality of the coating will affect the decorative effect of the painted aluminium sheet product. The factors that cause the advantages and disadvantages of the painted aluminum sheet coating include the environment, raw materials, coating equipment and coating technology.
Factors that cause the advantages and disadvantages of aluminium painted sheet coating:
1, Environment
The interior in the coating room of painted aluminum sheet manufacturer is required to be clean, dust-proof, insect-proof and ventilated to ensure that the coating surface quality of the prepainted aluminum sheet is not polluted. At the same time, the process conditions are changed in time due to temperature changes.
2. Raw materials
Coatings and aluminum sheet quality are the factors that most affect the coating quality in the coating process. Due to the color difference between batches of coatings, the fineness of the coatings is not enough and the coating rate is not high, and the coatings and solvents are poorly matched, delamination, etc. It directly affects the coating effect and produces defects. The unevenness of the aluminum coil substrate, the uneven film thickness, and the poor edge deflection also directly affect the painted aluminum sheet product quality and overall use. Therefore, when selecting raw materials, it should be strictly controlled. The raw materials of painted aluminum sheets are mainly 3003, 3004, 3104 and 3105 aluminum sheet or coil.
3, Equipment
The coating line of aluminium painted sheet factory requires the coating equipment to be in good condition, the coating equipment needs to run smoothly, there can be no horizontal and vertical jitter, and the coating roller needs to be finely ground. The lateral runout of all rollers of the coating machine must be controlled within the allowable range, otherwise the surface quality of the coating will be seriously affected.