Automobile hub coating film

Abstract

The invention discloses an automobile hub coating film, which comprises a hub body, wherein the surface of the hub body is provided with a primer layer, a middle coating and a finish paint layer frominside to outside in sequence; the primer layer, the middle coating and the finish paint layer are all in spraying and forming arrangement by powder paint; the grain diameter of the powder is 30-45 micrometers, a leveling rate and a powdering rate can be balanced, and surface properties, including coating film gloss, plumpness and the like, are excellent; the powder grain diameter of the finish paint layer is greater than the powder grain diameter of the middle coating and the powder grain diameter of the primer layer in sequence; and the thickness of the middle coating is greater than the thickness of the primer layer and the thickness of the finish paint layer in sequence. By use of a powder paint way, the omission of a base colored paint for automobile hub painting becomes a new development direction, so that the emission of VOCs (Volatile Organic Compounds) in a whole painting process is lowered by about 20% according to the characteristic of zero VOC of the powder paint, paintingworking procedures are reduced, efficiency is improved, a yield is improved, and cost is lowered.

Description

technical field [0001] The invention relates to the technical field of automobile wheel hub protection, in particular to an automobile wheel hub coating film. Background technique [0002] The hub (Car Rim) is the part where the axle is installed in the center of the wheel, which is what people often call "rim" or "steel ring". Therefore, the choice of coating film on the surface of the wheel hub is particularly important. In addition to good surface quality and workability, the coating film on the surface of the wheel hub also needs excellent mechanical properties, good horizontal fluidity, salt spray resistance and weather resistance. [0003] However, the surface of the automobile wheel hub is mostly a rough casting surface, which leads to poor contact of the coating film and affects the life of the coating film. Moreover, the automobile wheel hub is the main load-bearing part of the automobile, which requires not only sufficient mechanical strength, but also sufficient t...

AI Technical Summary

Problems solved by technology

[0003] However, the surface of the automobile wheel hub is mostly a rough casting surface, which leads to poor contact of the coating film and affects the life of the coating film. Moreover, the automobile wheel hub is the main load-bearing part of the automobile, which requires not only sufficient mechanical strength, but also sufficient toughness to The impact resistance is guaranteed, and the hub is easy to be stained with dirt. If it is not cleaned for a long time, it may be corroded and deformed, resulting in a safety hazard