Spray gun for powder electrostatic coating

Abstract

A spray gun for powder electrostatic coating in which the pattern width can be regulated easily, a spray pattern having an appropriate spray speed and an appropriate spread is formed, a high charging effect is imparted to the particles by a charging electrode, and the coating efficiency is enhanced. Regulation air openings (31) for jetting compressed air toward a central spray flow are provided on both sides of a jet opening (22), and the pattern width can be regulated by regulating the flow rate of the compressed air. The jet opening (22) is provided with auxiliary air openings (23) for jetting compressed air along a powder spray flow arranged around a central opening (21) for jetting powder. The spray gun can be adapted to the shape and portion of the object to be coated under an optimal condition by imparting a straight drive force to the spray flow by the compressed air from the auxiliary air openings (23). Furthermore, a charging electrode (9) is arranged at the center of the jet opening (22), and the distal end of the electrode is located at or just before the colliding / scattering position of the jet air.

Description

technical field [0001] The invention relates to a spray gun for powder electrostatic spraying which sprays powder paint and applies electrostatic action to the object to be sprayed. The spray pattern can be adjusted according to the spraying conditions and the spraying efficiency can be improved at the same time. Background technique [0002] Among many spraying methods, powder spraying is environmentally friendly because it does not use solvents, saves resources, and prevents the emission of volatile organic compounds, compared with spraying of liquid paints that use solvents and apply dry coatings. , In addition, it also has the advantages of good film strength. In addition, since the paint that has not been applied to the object to be sprayed can be recycled and reused, it is a good spraying method in terms of efficient use of resources. [0003] On the other hand, among various powder spraying methods, powder spraying using a spray gun is widely used as a spraying metho...

AI Technical Summary

Problems solved by technology

[0012] The object of the present invention is to solve the problem that conventional pattern width adjustment is difficult in spray guns for powder spraying using electrostatics, and the problem that it cannot widely correspond to the shape of the object to be sprayed is provided. , and can make the spraying into the optimal spraying state, improve the spraying quality and increase the productivity of the spray gun for powder electrostatic spraying

Images