Flexible overdye coating process for automobile body

Abstract

The invention discloses a flexible overdye coating process for an automobile body, and belongs to the technical field of coating. According to the coating process, aiming at the products with exposedcolor lines, fifteen procedures of 1, primer coating, 2, floating coating and colored paint coating, 3, varnish coating, 4, drying, 5, primary modification, 6, overdyeing shielding, 7, wiping, 8, colored paint overdyeing, 9, varnish coating, 10, drying, 11, shielding removal, 12, color separation line grinding and polishing and wiping, 13, varnish coating (colored paint gun closing), 14, drying and 15, inspection and modification are adopted to achieve color separation of a visible position and the automobile body high-quality requirements that boundaries of double-color products are clear andwithout paint piling and stair feeling. In order to accurately separate colors and ensure the consistency of color separation lines of each automobile, a 3D printing tool is adopted. The process is suitable for various traditional coating processes and floating-coat-free processes at present, can meet the spraying requirements of workshops for producing different types of overdye automobile models at the same time, reduces the quality defects and reinvestment transformation of a coating production line while effectively improving the overall coating quality effect of the overdye automobile body, and is worthy of popularization and reference.

Description

technical field [0001] The invention belongs to the technical field of coating, and in particular relates to a flexible color-registering coating process for an automobile body. Background technique [0002] Consumers have higher and higher requirements for car appearance. In recent years, there are more and more two-color car bodies on the market. Two-color (over-color) car bodies have become a popular trend in car appearance, and they are new selling points and charms. However, the production process of the two-color body is complicated, which not only increases the process cost, but also seriously affects the production rhythm, and it is difficult to control the appearance quality of the color separation line. Common color separation line defects include: bleed paint, sawtooth, gap, step feeling, offset printing, etc. When the color separation line is in the visible area outside the body (such as color separation at the waistline of the body), these defects have brought ...

AI Technical Summary

Problems solved by technology

[0006] Disadvantages and deficiencies in the prior art: This method mainly has three deficiencies for the two-color car body with the exposed color separation line.

Second, the workload of covering the part above the waistline of the car body is relatively large, and it is difficult for the painting workshop with high production cycle requirements to realize the covering of this part. In some color separation schemes, the door needs to be removed for covering to ensure the covering effect

Third, the doors, B-pillars, front cover, rear door, and side panels above the waistline of the body need to be covered separately. If the shielding is not strict, the robot will easily generate paint mist during the process of opening the door and spraying the body.

[0009] Disadvantages and deficiencies in the existing technology: the main disadvantage of this method for the two-color car body with the exposed color separation line is that there is a sense of step at the lap joint, and customers complain more about this part of the defect

[0011] Disadvantages and deficiencies in the existing technology: This method mainly has three disadvantages. First, the workload of covering the part above the color separation line of the car body is relatively large, and it is difficult for the painting workshop with high production cycle requirements to realize the covering of this part.

The second is that the quality defects that occur after the paint is dried cannot be polished, and the quality defects such as dirty particles are easily polished and cannot be repaired.

Third, it is easy to scratch the paint surface during the protection process

[0014] Disadvantages and deficiencies in the prior art: This method mainly has two deficiencies. One is that the quality defects that occur after the paint is dried cannot be modified and polished, and the quality defects such as dirty particles are easily polished and cannot be repaired.

Second, it is easy to scratch the paint surface during the protection process

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