Gradient vehicle body pattern, spraying method and vehicle

Abstract

The application provides a gradual change vehicle body pattern, a spraying method and a vehicle, and relates to the field of spraying technology. The method comprises the following steps: marking the outline of the solid color part of the gradual change pattern on the surface of the finish layer; spraying transition color paint along the outline to form a transition color paint outline, and performing flash drying, wherein the thickness of the transition color paint layer is 10-15 mu m; wet-on-wet spraying multi-layer color paint to the solid color part along the transition color paint outline, and performing flash drying after each layer of spraying, wherein the total thickness of the color paint layer is 20-30 mu m; and performing baking and curing on the gradual change pattern. The vehicle body pattern obtained by the above method is consistent in glossiness and can eliminate the boss defect.

Description

Technical Field

[0001] This invention belongs to the field of spraying technology, and particularly relates to a gradient body pattern, spraying method and vehicle. Background Technology

[0002] The information disclosed in this background section is intended only to enhance understanding of the overall background of the invention and is not necessarily to be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

[0003] As consumers' aesthetic demands for car bodies continue to rise, the complexity of car body patterns is also increasing. Patterns with gradient edges offer a unique visual effect and are gradually gaining popularity among consumers.

[0004] Gradient patterns consist of a solid color portion and a gradient color portion. Within the gradient color area, the closer to the solid color portion, the closer its color is to the solid color, until it blends seamlessly with it; the farther away from the solid color portion, the closer its color is to the background color, until it completely transforms into the background color. Current gradient pattern painting methods involve first spraying the solid color portion onto the baked topcoat layer, and then spraying the transition color paint onto the outer edge of the solid color portion. Because the boundary between the solid color and gradient color portions undergoes two spraying and baking processes, and these two parts are sprayed in an overlapping manner, the solid color paint surface has a certain thickness, resulting in raised areas in this region, affecting the smoothness and gloss of the vehicle's paint surface. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a gradient body pattern, a spraying method, and a vehicle, eliminating defects such as protrusions generated during the current gradient color pattern preparation process.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: Firstly, a method for spraying gradient body patterns includes the following steps: S1. Mark the outline of the solid color portion of the gradient pattern on the surface of the topcoat layer; S2. Spray transition paint along the contour to form the transition paint contour, and flash dry. The thickness of the transition paint layer is 10~15μm. S3. Apply multiple layers of paint along the outline of the transition paint to the solid color area by wet-on-wet spraying. After each layer is sprayed, allow it to stand and flash dry. The total thickness of the paint layer is 20~30μm. S4. Bake and cure the gradient pattern.

[0007] Secondly, a gradient body pattern is prepared by the aforementioned gradient pattern spraying method.

[0008] Thirdly, a vehicle comprising the aforementioned gradient body pattern.

[0009] The beneficial effects of this invention are as follows: In preparing the gradient pattern for the vehicle body, this invention first accurately marks the outline of the solid color portion of the pattern, then sprays a transition color paint along the outline to obtain the transition color paint outline. Next, using a wet-on-wet spraying method, the solid color portion of the gradient pattern is sprayed inside the transition color paint outline, and finally, it is baked and cured. Because both the solid color paint and the transition color paint are applied in a single coat, the difference in paint film thickness at the boundary between the two, which is caused by overlapping spraying, is avoided. This results in a consistent gloss level for the obtained vehicle body pattern and eliminates bump defects. Attached Figure Description

[0010] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0011] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0012] Figure 1 This is a schematic flowchart of the gradient body pattern spraying method in Example 1.

[0013] Figure 2 This is a physical image of the gradient car body pattern in Example 1.

[0014] Figure 3 This is a schematic diagram of the engraved pattern in Example 1.

[0015] Figure 4 This is a real-life image of the gradient car body pattern, scale 1.

[0016] Figure 5 These are schematic diagrams of the paint surface cross-sections of Example 1 and Comparative Example 1. (A) is a construction schematic diagram of Example 1, (B) is a construction schematic diagram of Comparative Example 1, and (C) is a construction schematic diagram of Comparative Example 2. In these diagrams, 1 represents the background color, 2 represents the gradient paint film, and 3 represents the solid color paint film. Detailed Implementation

[0017] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0018] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0019] A bump is a coating surface defect that is formed when a layered spraying method is used at a certain location. Since both coats of paint formed by the layered spraying have thickness, the paint film thickness in the layered spraying area is significantly greater than that in other locations.

[0020] One or more embodiments of the present invention provide a method for spraying gradient vehicle body patterns, comprising the following steps: S1. Mark the outline of the solid color portion of the gradient pattern on the surface of the topcoat layer; S2. Spray transition paint along the contour to form the transition paint contour, and flash dry. The thickness of the transition paint layer is 10~15μm. S3. Apply multiple layers of paint along the outline of the transition paint to the solid color area by wet-on-wet spraying. After each layer is sprayed, allow it to stand and flash dry. The total thickness of the paint layer is 20~30μm. S4. Bake and cure the gradient pattern.

[0021] In the above process, since the solid color paint and the transition color paint are applied in one coat, the difference in paint film thickness between the two is avoided, resulting in a consistent gloss of the body pattern and eliminating protrusion defects.

[0022] Optionally, in S1, the method for preparing the topcoat layer includes: spraying a topcoat onto the pretreated surface and baking it to obtain the topcoat layer, which is in preparation for subsequent color paint to be sprayed on the topcoat layer, and is a conventional method in the art.

[0023] Optionally, in S1, the method for preparing the contour includes: after pasting the solid-color engraving pattern on the surface of the topcoat layer, tracing the outline with a pencil to obtain the contour, and then removing the engraving pattern to obtain a contour with accurate positioning.

[0024] Optionally, in S2, a paint-colored spraying material is used, and the spray gun fan width and pressure are reduced to spray the paint along the outline to form a transitional paint outline.

[0025] Optionally, in S2, the spraying environment is: temperature 20-25℃, humidity 50-65%; and the application viscosity of the transition paint is 18-20s.

[0026] Optionally, in S2, the flash drying method includes: standing for 5~10 minutes; in S3, the flash drying method includes: standing for 5~10 minutes.

[0027] Optionally, in S3, the spraying environment is: temperature 20-25℃, humidity 50-65%, and the application viscosity of the color paint is 18-20s. Since the solid color paint and the transition color paint are sprayed in one coat, the difference in paint film thickness between the two is avoided, and the gloss of the obtained body pattern is consistent, which can eliminate the defects of raised bumps.

[0028] Optionally, in S4, the baking temperature is 80~85℃ and the baking time is 30~40min; to complete the curing of the gradient pattern.

[0029] One or more embodiments of the present invention provide a gradient vehicle body pattern, which is prepared by the gradient pattern spraying method described above.

[0030] One or more embodiments of the present invention provide a vehicle including the aforementioned gradient body pattern.

[0031] The present invention will be further described below with reference to specific embodiments.

[0032] Example 1 A gradient car body pattern, such as Figure 2 As shown, the design includes a solid color section and a gradient color section. Both the solid color and gradient color sections use the same color spray paint. Due to the influence of spray gun pressure, spray width, and paint film thickness, the paint spray in the gradient color section does not completely cover the background color, thus achieving the purpose of color gradient. The colors of the solid color section and the background color section gradually transition through the gradient color; within the gradient color section, the closer to the solid color section, the closer the color is to the solid color section, and the farther away from the solid color section, the closer the color is to the background color.

[0033] Spraying methods such as Figure 1 As shown, it includes the following steps: S1. Pre-treatment of the vehicle body surface, including sanding, dust removal, and degreasing, followed by spraying topcoat onto the pre-treated surface, baking to obtain the topcoat layer, and then sanding and cleaning the topcoat layer. Finally, adhesives such as... are applied to the surface of the topcoat layer. Figure 3 The solid color part of the pattern is engraved, and then the outline of the engraved pattern is traced with a pencil to obtain the outline of the solid color part of the gradient pattern that remains on the surface of the topcoat. Then the engraved pattern is removed.

[0034] S2. In a spraying environment with an average temperature of 23℃ and an average humidity of 57%, a transition paint with a construction viscosity of 19±1s is sprayed along the contour to form a transition paint contour, and then flash-dryed for 8 minutes. The thickness of the transition paint layer is 12.5±1.5μm. S3. Under the spraying environment with an average temperature of 23℃ and an average humidity of 57%, apply two coats of paint with a construction viscosity of 19±1s along the outline of the transition paint to the solid color part. The spraying direction is from the outline of the transition paint to the inside of the solid color part. After each layer is sprayed, let it stand for 8 minutes to flash dry. The total thickness of the paint layer is 25±3μm. S4. Bake the gradient pattern to cure it at 85℃ for 40 minutes.

[0035] The spraying process is as follows Figure 5 As shown in (A), first, spray along the boundary between the gradient color part and the solid color part, that is, the outline position, to obtain a gradient color paint film 2 that covers the background color 1. The gradient color paint film 2 is thickest in the center and completely covers the background color 1, but gradually thins at the edges and cannot completely cover the background color 1, thus achieving a transition between the two. Then, spray along the gradient color paint film 2 towards the solid color part to obtain a solid color paint film 3. The covering effect of the solid color paint film 3 can be adjusted to compensate for the part of the gradient color paint film 2 that does not completely cover the background color 1 in the solid color part. Due to the use of a wet-on-wet spraying method, the gradient color paint film 2 and the solid color paint film 3 are integrated.

[0036] The obtained gradient body pattern is as follows Figure 2 As shown, the pattern is flat, has a uniform gloss, and has no protrusions.

[0037] Comparative Example 1 The spraying process is as follows Figure 5 As shown in (B), first, a solid-color paint film 3 is sprayed onto the solid-color area, and then a gradient paint film 2 is sprayed along the edge of the solid-color area. Since the gradient paint film 2 needs to be sprayed along the outline of the solid-color area, a raised area will appear at the edge of the solid-color area, as shown in Figure 1. Figure 4 As shown, there is a prominent protrusion.

[0038] Comparative Example 2 The spraying process is as follows Figure 5 As shown in (C), a solid-color paint film 3 is first sprayed onto the solid-color portion, followed by a gradient-color paint film 2 sprayed along the edge of the solid-color portion. To prevent protrusions from appearing at the contour position, the edge of the solid-color paint film 3 is recessed inward by a set distance from the solid-color portion. Then, the gradient-color paint film 2 is sprayed along the contour. However, since the recessed distance needs to be a set distance, it is necessary to outline along the recessed distance in step S1, which increases the workload. Furthermore, since the process actually involves spraying two contours—the contour of the gradient-color portion and the solid-color portion, and the contour formed by the recessed area—the spraying quality between the two contours is difficult to guarantee.

[0039] Example 2 A vehicle comprising the gradient body pattern shown in Example 1.

[0040] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for spraying gradient car body patterns, characterized in that, Includes the following steps: S1. Mark the outline of the solid color portion of the gradient pattern on the surface of the topcoat layer; S2. Spray transition paint along the contour to form the transition paint contour, and flash dry. The thickness of the transition paint layer is 10~15μm. S3. Apply multiple layers of paint along the outline of the transition paint to the solid color area by wet-on-wet spraying. After each layer is sprayed, allow it to stand and flash dry. The total thickness of the paint layer is 20~30μm. S4. Bake and cure the gradient pattern.

2. The gradient body pattern spraying method according to claim 1, characterized in that, In S1, the method for preparing the topcoat layer includes: spraying a topcoat onto a pretreated surface and baking it to obtain the topcoat layer.

3. The gradient body pattern spraying method according to claim 1, characterized in that, In S1, the method for preparing the outline includes: after pasting the solid color part of the engraved pattern on the surface of the topcoat layer, tracing the outline with a pencil, and then removing the engraved pattern.

4. The gradient body pattern spraying method according to claim 1, characterized in that, In S2, use the normal paint color, reduce the spray gun fan width and pressure, and spray the paint along the outline to form a transitional paint outline.

5. The gradient body pattern spraying method according to claim 1, characterized in that, In S2, the spraying environment is: temperature 20-25℃, humidity 50-65%; the application viscosity of the transition paint is 18-20s.

6. The gradient body pattern spraying method according to claim 1, characterized in that, The flash drying method includes: standing for 5-10 minutes; In S3, the flash drying method includes: standing for 5-10 minutes.

7. The gradient body pattern spraying method according to claim 1, characterized in that, In S3, the spraying environment is: temperature 20-25℃, humidity 50-65%, and the application viscosity of the paint is 18-20s.

8. The gradient body pattern spraying method according to claim 1, characterized in that, In S4, the baking temperature is 80~85℃ and the baking time is 30~40min.

9. A gradient car body pattern, characterized in that, It is prepared by the gradient pattern spraying method as described in any one of claims 1-8.

10. A vehicle, characterized in that, Including the gradient body pattern as described in claim 9.

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