Coating is an important process in the production of aluminium sheet. The quality of coating directly affects the decoration effect of aluminium sheet. There are four main factors contributing to the quality of aluminium sheet coating. Let's let aluminium sheet manufacturers take you to know about this aspect. Friends interested in this aspect must not miss it.
It is required that the interior of the painting room be clean, dust-proof, insect-proof and ventilation-proof, so as to ensure that the surface quality of the aluminium sheet coating is not polluted. Together, due to the change of temperature, the process conditions should be changed in time.
2. Raw materials
Coatings and aluminium sheets are the most important factors affecting the quality of coatings in the process of painting, because there are color differences between batches of coatings, poor fineness of coatings and low coating rate, poor coordination between coatings and solvents, stratification and so on, which will directly affect the coating effect and produce shortcomings.'The irregularity of the base material of aluminium coil, uneven film thickness, poor edge flexibility also directly affect the quality of products and the overall use of the coatings. Therefore, the selection of raw materials should be strictly controlled.
Coating line requires painting equipment to be complete, painting equipment to work smoothly, not to have horizontal and vertical jitter, coating rollers to be polished delicately. All rollers of the coating machine run horizontally, it is necessary to operate within the allowable range, otherwise it will seriously affect the surface quality of the coating.
Painting process is closely related to the quality of painting, requiring that the relative linear velocity ratio of painting roll, painting roll, measuring roll and base material should be controlled within a certain range. According to different systems and film thickness of coating products, a certain range of viscosity should be set for coating to ensure smooth painting and promote the progress of product quality. Coating curing process and oven operation should be operated according to requirements. Control, not arbitrary change, otherwise it will seriously affect the color difference and function of painting products.
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