Composite coating method for the surface of heat-dissipating tooth parts

Abstract

The invention discloses a compound painting method for surfaces of heat radiating teeth class parts. By utilizing the method, the root regions of heat radiating teeth can be reached, and the coating quality of deep regions is enhanced. The compound painting method is realized through the technical scheme: dividing the surfaces of the heat radiating teeth class parts into A, B, C and D painting regions according to the teeth width and teeth depth parameters of the heat radiating teeth, and carrying out three-stage stepped spraying treatment on the roots, side surfaces and tops of the heat radiating teeth class parts; first, using a thin-pipe long-neck spraying gun to carry out stepped spraying treatment on the bottom and side wall deep-cavity coating regions of the heat radiating teeth; avoiding other regions, carrying out skip spaced spraying on the bottom regions of the heat radiating teeth at a perpendicular angle, and then, spraying the side wall regions of the heat radiating teeth from bottom to top at an angle of 70-80 degrees; and after standing for 5-10 minutes, changing a common spraying gun after coated films are leveled, and carrying out large-area spraying on the top and other outer coating regions of the heat radiating teeth by using the common spraying gun.

Description

technical field [0001] The invention relates to a method for painting heat-dissipating tooth parts, which is used to improve the appearance and protection ability of the paint film of the heat-dissipating tooth parts. Background technique [0002] The paint quality of cooling gear parts has been unsatisfactory due to the many dense and deep tooth-like areas. Using the current traditional painting method, it is impossible to coat every part, which often results in missing spray on the root and side of the heat dissipation tooth, but the phenomenon of paint film accumulation on the top area. The uneven thickness of the coating film on the surface area of ​​the entire part and the problem of easy peeling often lead to poor adhesion of the paint film, low production efficiency, and high rework rate, which affects the appearance quality and service life of the surface of the heat-dissipating tooth parts. A major technical bottleneck in the painting of heat-dissipating tooth part...

AI Technical Summary

Problems solved by technology

[0002] The paint quality of cooling gear parts has been unsatisfactory due to many dense and deep tooth-like areas

Using the current traditional painting method, it is impossible to apply to every part, which often results in missing spray on the root and side of the heat dissipation tooth, but the phenomenon of paint film accumulation on the top area

The uneven thickness of the coating film on the surface area of ​​the entire part and the problem of easy peeling often lead to poor adhesion of the paint film, low production efficiency, and high rework rate, which affects the appearance quality and service life of the surface of the heat-dissipating tooth parts. A major technical bottleneck in the painting of heat-dissipating tooth parts

The traditional method uses a conventional spray gun for spraying. Due to its large spray width (about 400mm) and short nozzle (<1cm), it cannot coat the deep heat dissipation tooth parts, so that the root and side areas of the heat dissipation tooth lose the protection of the paint film. Effect, weakens the corrosion resistance of heat dissipation tooth parts

Excessively thick paint films on the end surfaces of cooling gears and thin coating films on the roots and sides caused by the existing technology will lead to poor uniformity of the coating film and inability to form a continuous film, making the coating film easy to fall off and affecting the appearance quality of the product

The traditional spraying method adopts the large-area spraying method, which cannot realize the regional spraying provided by the present invention

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