The production process of spray plate originally evolved from the process of spraying powder after metal forming. This technology has been a big step ahead of forming spray, also known as powder spray production line. Although the powder spraying production line also adopts continuous production mode, there are still problems such as low efficiency, high labor intensity, large waste of coating, uneven thickness of coating film and so on, because the coating process is still in the form of spray gun arrangement, and there is no qualitative change compared with the forming spraying process. Therefore, the spraying production line has been basically replaced by the color coated plate production line.
The color coated steel plate is a kind of composite material, which is made by degreasing and chemical treatment on the surface of steel plate and drying and curing after roller coating special coating or film on the surface of steel plate. It turns the traditional spray coating into the continuous coating of steel plate, which is convenient for surface treatment and coating quality control, and there is no edge and dead angle and other defects that are easy to occur in coating.
Compared with the traditional powder spraying production, the color steel plate has the advantages of high efficiency, energy saving and environmental protection. At the same time, its comprehensive cost is also cheaper than that of the spraying plate. Adopting the color coated steel plate process can reduce the cost of the thin plate coating products by 5% ~ 10%, and save energy by 1 / 6 ~ 1 / 5. However, the spraying process has the advantages of low efficiency, high labor intensity, large paint waste and uneven film thickness. Therefore, the spraying production line is basically replaced by the color coated plate production line.