Coating is an important process in the production of the entire aluminum coil painting. The appearance quality of coating products not only reflects the protection and decorative performance of the product, but also an important factor that constitutes the value of the product. However, in this critical process, various problems will always occur. So, what causes the quality problem of aluminum coil painting?
1. Process
The coating process is closely related to the quality of the coating. It is required to control the relative line speed of the coating roller, paint roller, metering roller and substrate to a certain range. According to the different systems and membranes of the coated products, the coating should set a certain viscosity range to ensure smooth coating and improve product quality. The curing process and oven control of coatings must be controlled as required, and it must not be changed at will, otherwise it will seriously affect the color difference and performance of the coating product.
2. Raw materials
Coating and aluminum rolls are the influential factor in the coating process. Due to the color difference between the coating batch, the coating rate is not high due to the lack of fineness, the coordination of coordination and the solvent of the aluminum powder, the coating rate is not high. It will directly affect the coating effect and cause defects. The unevenness of the aluminum coil substrate, the thickness of the membrane, and the poor marginal deflection also directly affect the quality and overall use of the product. Therefore, the selection of raw materials should be strictly controlled.
3. Equipment
The coating line requires that the coating line equipment is in good condition. The horizontal beating 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.
4. Human factors
The sense of responsibility, technical proficiency, and operating standardization of operators are the key to obtaining high -quality coating effects. Therefore, it is necessary to strengthen the training of operators, let them master the principles and points of the coating process, strengthen the sense of responsibility, and operate in strict accordance with the operating procedures to ensure high -quality coating products.
5. Environment
The spraying room is required to clean, prevent dust, insects, and ventilation to ensure that the surface quality of the paint is not contaminated. At the same time, process conditions change in time due to changes in air temperature.
The above is the reason for the quality of aluminum coil painting. These factors are interconnected and influenced. Sometimes the occurrence of a defect is related to many factors. It is necessary to analyze specific problems and exclude them one by one. The quality of coating products, especially the appearance quality, directly affects the decorative effect of the product.
