Spray gun for powder electrostatic coating

Abstract

The utility model relates to a spray gun for powder electrostatic spraying, the pattern width of which can be easily adjusted to form a spray pattern with a corresponding spray speed and a corresponding width. A higher charging effect can be applied to the spray particles through the charged electrode, and the spraying efficiency can be improved. On both sides of the ejection port (22), there are adjusting air ports (31) for jetting compressed air towards the center, and the pattern width can be adjusted by adjusting the flow rate of the compressed air. An auxiliary air port (23) is provided at the ejection port (22) for ejecting compressed air along the powder jet flow around the central opening (21) where the powder is ejected. Through the compressed air from the auxiliary air port (23), the straight-forward force is exerted on the spray flow, which corresponds to the shape of the sprayed object and the sprayed part under the optimal condition. In addition, a charging electrode (9) is arranged at the center of the ejection port (22), and the tip of the electrode is placed at or in front of the collision / scattering position of the above-mentioned 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

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