Air atomization air cover for spray gun

Abstract

The invention provides an atomization apparatus capable of lessening the unevenness of the entire patterned region at the time of spraying and accordingly making the coating thickness distribution uniform in the coated face and easily forming a smooth coating free from disorder of the coating face in an air atomizing spray gun. The air cap is to be used in an air spray gun for atomization with compressed air and has a center air port composing a circular air port in the outer peripheral part of a center coating material jetting port, a pair of corner parts formed symmetrically in the outside of the center air port, and side air ports for forming spraying patterns by jetting air through the corner parts. In the air cap, the surface area of inlet parts of vertical holes formed in the respective corner parts and communicating with the side air ports is made smaller than the surface area of the side air ports. To make the inlet surface area narrower than the vertical hole surface area by narrowing the flow channel surface area, a bush is fitted or caulking is carried out in the circumference of the vertical hole inlets.

Description

technical field [0001] The present invention relates to an air spray gun which uses compressed air to atomize paint, etc., and then sprays it toward the object to be coated, and particularly relates to the mist of an external mixing air spray gun capable of forming a coating film in which atomized particles are uniformly dispersed during spraying air cover. Background technique [0002] Air spray guns for atomizing paint with compressed air to form a coating surface are widely used in various fields. Among them, industrial spray guns used in the final coating of metal, woodworking, plastic products, etc., need to improve the spray performance of spray guns due to the diversification of coatings in recent years and the improvement of quality requirements for objects to be coated. [0003] Since these industrial spray guns atomize the paint and spray it on the object to be coated, no matter it is a complex coating surface or a flat surface, a uniform and smooth surface can be...

AI Technical Summary

Problems solved by technology

[0012] As mentioned above, many improvements have been made to the air cap that can ensure the film thickness distribution of the appropriate spray pattern and form the spray pattern whose pattern shape matches the specification purpose of the coating, but the technology to reduce the unevenness of the mist during spraying is not yet available. immature

That is, as a result of conventional improvement of the spray pattern, the distribution of the spray stream does not tend to improve on the surface

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