Teflon spraying process

Abstract

A Teflon spraying technology comprises the following steps that the viscosity of a coating is adjusted, and the viscosity of the coating used for first-time spraying needs to be high; the surfaces of parts are clean and free of stains; the coating is sprayed for the first time, spraying with the coating for the first time mainly guarantees the thickness of a paint film, and the thickness accounts for 90% or above; after coating, primary curing is carried out for 30 minutes in a drying oven at 220+/-5 DEG C; the viscosity of the coating is adjusted, and the viscosity of the coating used for second-time spraying needs to be low; the coating is sprayed for the second time, spraying with the coating for the second time mainly guarantees the surface quality of the paint film, and the surface of a film layer is easily smooth by spraying with the coating with the lower viscosity; and after coating, secondary curing is carried out for 30 minutes in the drying oven at 220+/-5 DEG C. According to the Teflon spraying process, two times of spraying are carried out; and during spraying, the first time of spraying adopts the coating with high viscosity, and the second time of spraying adopts the coating with low viscosity, so that the surface of the film layer is more uniform and smoother, meanwhile, the surface is completely covered, and flow marks are avoided.

Description

technical field [0001] The invention relates to the technical field of a paint spraying process, in particular to a spraying process that requires a smooth, flat and full coverage of the surface film layer. Background technique [0002] In the field of aviation manufacturing, some parts are required to be sprayed with Teflon for the purpose of dry lubrication to reduce friction and improve wear resistance, and to ensure that the required surface is fully covered as much as possible, and the required surface film layer is uniform and smooth . However, in actual production, the inevitable contact between the parts and the tooling during spraying will lead to incomplete surface coverage, thus reducing the dry lubrication and wear resistance. When the parts are used, the friction and collision may cause the film to break from the defect. Dropping will affect the service life of parts. And when the sprayed film is required to be thicker, if a high-viscosity paint is used, the s...

AI Technical Summary

Problems solved by technology

However, in actual production, the inevitable contact between the parts and the tooling during spraying will lead to incomplete surface coverage, thus reducing the dry lubrication and wear resistance. When the parts are used, the friction and collision may cause the film to break from the defect. Dropping will affect the service life of parts

And when it is required to spray a thicker film layer, if a high-viscosity paint is used, the surface will be rough due to the large mist particles, and if a low-viscosity paint is used, flow marks will easily occur