Method and apparatus for delivering paint to an applicator and flushing same

摘要

The disclosed apparatus includes a supply line (22) between a source of liquid paint and an applicator (62) having at least two pigs (20A, 20B) and a source (46A) of liquid solvent which delivers solvent between the pigs and the pigs are driven by paint from adjacent the paint source to the applicator, thereby delivering solvent followed by paint to the applicator. The apparatus further includes a second source (46B) of liquid solvent which delivers solvent between the pigs (20A, 20B) adjacent the applicator (62) and the pigs are returned through the supply line, thereby flushing the supply line. In the disclosed embodiment, the source of liquid paint is a piston dosing device (64) which receives paint from a color changer or the like and delivers a predetermined volume of paint to the applicator (62). The delivery line (22) preferably includes a friction resistant inner layer, an intermediate dielectric layer and a protective outer layer.