Precise cover for paint spraying on vehicle signs

Abstract

The invention discloses a precise cover for paint spraying on vehicle signs. The precise cover for paint spraying on vehicle signs comprises an upper cover and a base, wherein a cavity which is used for accommodating a vehicle sign and is matched with the boundary dimension of the vehicle sign to be sprayed with paint is formed in the front surface of the base; the bottom surface of the cavity isa curved surface which is matched with the front surface of the vehicle sign; the roughness Ra of the curved surface is less than or equals to 0.32; a through hole which is matched with the boundary dimension of the vehicle sign is formed in the upper cover; a pressure ring which is used for pressing the edge of the vehicle sign is integrally arranged on the upper cover; the pressure ring is arranged at the edge of the through hole; the upper cover and the base are separately obtained by a numerically controlled machine tool through one-time processing according to a three-dimensional CAD digital model; and a strong magnet mechanism is arranged between the base and the upper cover. By the cover, the yield of paint spraying can be increased effectively, so that a boundary between a paint spraying surface of the back surface of the vehicle sign and a covered surface is attractive, smooth and clear; the boundary of the shape of paint spraying is superposed to the edge of a boss or a groove in the specific shape of the vehicle sign; and the problems that a paint spraying boundary deflects and paint enters the cover surface are avoided completely.

Description

technical field [0001] The invention relates to a cover, in particular to a precision cover for painting automobile signs. Background technique [0002] The logo located directly in front of the exterior of the car is the most eye-catching decorative part. As a trademark brand of the car, it symbolizes the company's history, status, purpose and goals, etc. It has rich cultural connotations and requires exquisite appearance and fineness. higher. The ACC adaptive active cruise logo is a special logo used for high-end and high-end models, and its appearance fineness requirements are much higher than other car exterior decorations. The painting process in the manufacturing process of ACC adaptive active cruise sign needs to spray paint on specific parts of the sign, or as a mask to improve its anti-aging performance, surface hardness, scratch resistance, or as a primer to improve vacuum coating The adhesion of the coating in the subsequent process is either used as a protectiv...

AI Technical Summary

Problems solved by technology

The cover made by manual polishing requires many processes and the cumulative errors of various processes are large, resulting in jagged defects in the boundary line and large deviations in the overall shape. In addition, this kind of spray cover is heavy. After the parts are closed, when the cover is closed, use the weight of the heavy upper cover to flip and close. When closing, the parts to be painted will be squeezed and displaced to a certain extent, resulting in part painting errors.

Existing paint spray covers are made by hand, and the accuracy is difficult to guarantee, especially for parts with complex curved surfaces formed by molds, it is difficult for handmade spray paint covers to completely fit the surface of the parts, that is to say, the surface of the cover The deviation of the geometric tolerance accuracy between the profile and the line profile is large, resulting in high-pressure paint blowing into the surface of the part where painting is prohibited through the large local gap between the mask and the surface of the part during painting, resulting in the final paint surface and the mask surface. The boundary between them is blurred, and it is often necessary to manually wipe off the excess paint with a cloth dipped in paint solvent, which is time-consuming and laborious, and it is easy to cause pollution and scratches on the surface of the parts, and the parts are scrapped due to improper operation

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