Liquid paint can be applied in many different ways. The three major components of a paint line are pretreatment, application, and cure. The type of industrial application process will be determined by the product, the volume, the quality requirements, and other factors. It may be as simple as a dip tank and a method of hanging parts, or it may be a fully enclosed automated system that allows continuous pretreatment, application, and curing.
The actual layout and specific equipment vary widely, but all paint lines have the same general stages: a loading area, pretreatment or cleaning stage, application stage, curing stage, and unloading area.
The loading/unloading stages are where parts are put on and taken off the paint line. The pretreatment stage is where the parts are prepared for the coating application stage. Cleaning can be done mechanically, such as blasting, or chemically by solvent washing, solvent wiping, power washing, or dipping. After cleaning, the parts are dried by heat or forced air or a combination of the two so that they are ready to be painted.