It is classified into two types: two self-suction of double-pipe spray gun, and two self-suction of composite-pipe spray gun. The atomization quantity and area of the double-pipe spray gun are adjustable, while both the gas discharge and atomization quantities of composite- pipe spray gun are adjustable. The gas discharge position is used for t he uniform drying of the coating by blowing and for the removal of the mold residues, while the liquid discharge position is used for the spraying of the liquid coating.
