Factors that may cause defects in the coating of aluminium sheets and coils

Factors that may cause defects in the coating of aluminium sheets and coils

Last time we introduced three possible causes of defects in the production of aluminium sheets and coils for painting, today we continue with two other factors that may cause defects in painting.

The coating process is closely related to the quality of the coating and requires that the relative line speed ratios of the coating rollers, paint lifting rollers, metering rollers and the substrate are controlled within a certain range. A certain range of viscosity should be set for the paint according to the different systems and film thickness of the painted product to ensure smooth painting and promote product quality. The curing process of the coating, oven control must be controlled as required and must not be changed arbitrarily, otherwise it will seriously affect the colour difference and performance of the painted product.

Next we come together to discuss the human factors that may lead to defects in the painting process of aluminium sheets and aluminum coils. The responsibility of the operator, his technical proficiency and the standardisation of his operations are the keys to obtaining high quality painting results. Therefore, it is important to strengthen the training of the operator and to allow the operator to master the principles and key points of the painting technique, to strengthen the responsibility and to strictly follow the operating procedures in order to ensure a high quality painted product.

The above factors are interlinked and affect each other. Sometimes the defects of one kind of aluminium sheet and coil are linked with many factors, so we must analyse the specific problems and exclude them one by one.