CN-121972385-A - Curved surface paint spraying demarcation process

CN121972385ACN 121972385 ACN121972385 ACN 121972385ACN-121972385-A

Abstract

The application relates to the field of paint spraying, in particular to a curved surface paint spraying demarcation process which comprises the following steps of S1, spraying a first color layer at a curved surface structure, S2, removing the first color layer at the second side of a color block demarcation, S3, spraying a release interlayer at the curved surface structure, wherein the release interlayer is sprayed on the second side of the color block demarcation and the surface of the first color layer, S4, removing the release interlayer at the second side of the color block demarcation, S5, spraying the second color layer at the curved surface structure, and spraying the second color layer on the second side of the color block demarcation and the surface of the release interlayer, and S6, removing the release interlayer so that the second color layer sprayed on the release surface is removed, and forming a first color block and a second color block on the first side and the second side of the color block demarcation respectively. The application has the effect of multicolor paint spraying which is convenient for demarcating the curved surface structure.

Inventors

SONG GUOXIN
PU DONGYUN
ZOU WEIYAN

Assignees

金源康(惠州)实业有限公司

Dates

Publication Date: 20260505
Application Date: 20260210

Claims (10)

1. A curved surface paint spraying demarcation process is characterized by comprising the following steps: step S1, spraying a first color layer (1) on a curved surface structure; S2, removing the first color layer (1) positioned on the second side of the color block dividing line (L1); step S3, spraying a release interlayer (3) at the curved surface structure, wherein the release interlayer (3) is sprayed on the second side of the color block dividing line (L1) and the surface of the first color layer (1); S4, removing the release interlayer (3) positioned on the second side of the color block dividing line (L1); step S5, spraying the second color layer (2) on the curved surface structure, wherein the second color layer (2) is sprayed on the second side of the color block dividing line (L1) and the surface of the release interlayer (3); And S6, removing the release interlayer (3) so that the second color layer (2) sprayed on the surface of the release interlayer (3) is removed, and forming a first color block (P1) and a second color block (P2) on the first side and the second side of the color block dividing line (L1) respectively.
2. The curved surface paint spraying demarcation process according to claim 1, wherein in the step S6, the removal of the release interlayer (3) is based on a chemical dissolution method or a temperature difference peeling method; The chemical dissolution method is to dissolve and destroy the release interlayer (3) between the first color layer (1) and the second color layer (2) through an interlayer solvent suitable for the release interlayer (3); The temperature difference stripping method is characterized in that a curved surface structure is kept in environments with different temperatures, so that the release interlayer (3) is deformed and cracked under the temperature stress, and then the release interlayer (3) to be stripped and the second color layer (2) on the surface of the release interlayer are removed through physical acting force.
3. The curved surface painting demarcation process according to claim 2, wherein in said step S6, the removal of the release liner (3) is based on a chemical dissolution method; the chemical dissolution method comprises the following steps: Step S01, spraying the interlayer solvent on a curved surface structure, or immersing the curved surface structure in the interlayer solvent; s02, immersing the curved surface structure in an ultrasonic cleaning tank; And S03, rinsing and drying the curved surface structure.
4. A curved surface paint spraying demarcation process according to claim 2 or 3, wherein in the step S3, the release interlayer (3) sprayed on the second side of the color lump demarcation line (L1) and the surface of the first color layer (1) is provided with concave-convex.
5. The curved surface painting demarcation process according to claim 4, wherein in the step S3: When the release interlayer (3) is sprayed, a flexible net material is covered at the curved surface structure, and after the spraying is finished, the flexible net material is removed and a solvent drainage groove (301) is formed; Or after the release interlayer (3) is solidified and molded, a solvent drainage groove (301) is formed in the release interlayer (3) through etching by a laser etching process.
6. The process according to claim 5, wherein in the step S3, the solvent guiding grooves (301) are provided with a plurality of solvent guiding grooves (301) extending toward the color lump boundary (L1).
7. The curved surface paint spraying demarcation process according to claim 5, wherein when a solvent drainage groove (301) is formed in the release interlayer (3) through a laser etching process, the solvent drainage groove (301) is positioned in a concave-convex area (31), and a leveling area (32) is arranged between the concave-convex area (31) and the color lump demarcation line (L1); In the step S6, after the release interlayer (3) located in the concave-convex area (31) is removed, the release interlayer (3) located in the leveling area (32) and the residual second color layer (2) are removed through carving by a laser carving process.
8. The curved surface paint spraying demarcation process according to claim 1, wherein in the step S4, the release interlayer (3) is removed by a laser etching process.
9. The process according to claim 8, wherein in the step S2, after removing the first color layer (1) located on the second side of the color lump boundary (L1), the first color layer (1) located on the first side of the color lump boundary (L1) is extended to the second side.
10. The curved surface painting demarcation process according to claim 1, further comprising the step of spraying a protective layer (4) on the surfaces of the first color patch (P1) and the second color patch (P2).

Description

Curved surface paint spraying demarcation process Technical Field The application relates to the field of paint spraying, in particular to a curved surface paint spraying demarcation process. Background In the fields of consumer electronics, automotive interiors and the like, the requirements on appearance decoration of product shells, functional parts and the like with curved surface structures are increasingly severe, and not only are accurate spraying of various colors realized on the curved surface, but also obvious color block boundaries between different color blocks are required to be realized, so that the visual texture and market competitiveness of products are improved. In the prior art, multicolor paint spraying demarcation is realized by adopting a template mask paint spraying process, wherein the process is used for customizing a mask template matched with the surface shape of a workpiece, performing paint spraying operation after shielding a non-spraying area, and removing the template after the paint layer is solidified to form color blocks with different colors. However, for curved surface workpieces, because of continuous curvature change on the surface, the mask template is difficult to be completely attached to the curved surface, so that paint mist can infiltrate into a shielding area through a gap in the paint spraying process, and the problem of halation and blurring of color lump edges is caused, and the product requirement of high-precision demarcation is difficult to be met. Meanwhile, aiming at curved surface workpieces with different curvature parameters, corresponding mask templates are required to be designed and manufactured independently, the development period of the die is long, the cost is high, and the inconvenience exists in multicolor paint spraying for demarcating a curved surface structure. Therefore, there is a need for a painting process that can adapt to curved surface structures, achieve high precision demarcations of multi-color painting, and does not require the reliance on a large number of specialized molds. Disclosure of Invention In order to facilitate multicolor paint spraying for demarcating a curved surface structure, the application provides a curved surface paint spraying demarcation process. The curved surface paint spraying demarcation process provided by the application adopts the following technical scheme: A curved surface paint spraying demarcation process comprises the following steps: step S1, spraying a first color layer on a curved surface structure; S2, removing the first color layer positioned on the second side of the color block dividing line; Step S3, spraying a release interlayer at the curved surface structure, wherein the release interlayer is sprayed on the second side of the color block dividing line and the surface of the first color layer; S4, removing the release interlayer positioned on the second side of the color block dividing line; step S5, spraying the second color layer on the curved surface structure, wherein the second color layer is sprayed on the second side of the color block boundary and the surface of the release interlayer; And S6, removing the release interlayer to remove the second color layer sprayed on the surface of the release interlayer, and forming a first color block and a second color block on the first side and the second side of the color block dividing line respectively. Through adopting above-mentioned technical scheme, greatly reduced the use to customization shade template, be convenient for avoid shade template and curved surface laminating not closely the paint mist infiltration that leads to and the fuzzy problem of color lump boundary halation, curved surface structure that can adapt to different curvature parameters to reduce the cost of demarcation paint spraying. And by spraying the first color layer, the release interlayer and the second color layer step by step and precisely removing the release interlayer and the second color layer on the surface of the release interlayer, the P1 color block and the P2 color block with clear boundaries and uniform colors can be conveniently formed on two sides of the color block boundary of the curved surface structure. Optionally, in the step S6, the removal of the release interlayer is based on a chemical dissolution method or a temperature difference peeling method; the chemical dissolution method is to dissolve and destroy the release interlayer between the first color layer and the second color layer by an interlayer solvent suitable for the release interlayer; The temperature difference stripping method is to keep the curved surface structure in a plurality of environments with different temperatures, so that the release interlayer is deformed and cracked under the temperature stress, and then the release interlayer to be stripped and the second color layer on the surface of the release interlayer are removed through physical acting force. Through adop