Within a spray painting production line, the pre-treatment system is typically positioned upstream of the spraying equipment; its primary objective is to optimize the condition of the workpiece surface, thereby establishing a robust foundation for the subsequent paint application to adhere to.

In traditional drying methods, such as natural drying or hot air drying, coatings may take a long time to fully cure. However, in paint spraying production lines using UV dryer machines, the coating can cure in a much shorter time under UV light.