In recent years, with the rapid development of the automobile industry, users' requirements for automobile quality have gradually increased. The gloss of the body color is a major factor in evaluating the quality of a car. Now that the color of the car body is becoming more and more diverse and complex, the issue of how car manufacturers can better control the color difference of car paint is a hot topic of discussion.
Due to the diversification of the color of the coating film of the automobile body, it is becoming more and more important to solve the problem of color difference of the coating film of the vehicle body. As we all know, there are color differences in different parts of the same car, and there will also be color differences when the same color is sprayed at different times. So, how to better control the color difference of car body coating?
If we want to control the chromatic aberration of the car body coating, then we must analyze and summarize the relevant influencing factors of the chromatic aberration of the automotive coating.
Formation of color difference in coating film
At present, in the automobile manufacturing process, metallic glitter paint and pearlescent glitter paint with "metal texture" effect are generally used, or mixed pigment paint. Due to the different composition and film-forming characteristics of metallic glitter pigments and pearlescent glitter paints, the particle size of the glitter pigments in the paint, the strength of the glitter, etc., and the angle of the emitted light of the coating are also different, so the color appears to be different to the naked eye. , resulting in chromatic aberration.
Effect of Medium Coat Paint Color
In the process of painting, if you want to avoid color difference, you should use light-colored or close-colored medium-coated paint to match the paint and reduce the influence of color difference.
Influence of Metallic Paint Stability
Due to the complex composition of metal coatings, its stability also directly affects the color of the coating film during the coating process, resulting in the appearance of color difference in the coating film of the car body.
Influence of Process Parameters
In the process of automobile spraying, the chromaticity difference of different parts is different, which is mainly caused by the equidistant spraying of the automatic gun as a hard imitation reciprocating machine and the unstable operation of the air regulating valve that controls the flow of paint.
Influence of spray paint room temperature and humidity
The paint needs to be diluted to adapt to the process. However, in the process of painting and drying, it will volatilize to a certain extent with the difference of temperature and humidity, which will affect the smooth line of the glitter pigment film and the color difference of the film.
Influence of Operating Parameters of Paint Transfer and Mixing System
Under different operating parameters of the paint mixing system, the speed of the paint flow rate will produce different shearing forces. Excessive flow rate will make the glitter particles shear finer and cause the color difference of the coating film. Therefore, it is necessary to maintain a constant flow rate for operation.
To sum up, we can understand the factors affecting the color difference in the car painting process, so the control of the color difference of the car body coating film should not be a problem now. I hope the above related introduction will be helpful to you.
