Automobile interior panel and preparation method thereof

Abstract

The invention relates to the field of automotive trim, in particular to an automotive trim panel and a preparation method. The automobile interior trim panel comprises an interior trim panel material and white paint sprayed on the interior trim panel material. A laser etching pattern is arranged on the automobile interior panel; raw materials of the interior panel material comprise plastic particles and toner, the toner is white plastic toner, and the weight ratio of the plastic particles to the toner is 20: 1. The proportion of the plastic particles to the toner is adjusted, and the problem that the clear degree and the bright degree of the laser etching pattern of the white automobile interior trim panel are poorer than those of automobile interior trim panels with other colors is solved.

Description

Technical Field

[0001] The present invention relates to the field of automotive interiors, and particularly to an automotive interior panel and a preparation method thereof. Background Art

[0002] Currently, laser-engraved patterns are usually provided on automotive interior panels. For example, as Figure 1 shown, a laser-engraved pattern is provided on the switch panel of the car door.

[0003] The preparation method of the current automotive interior panel with a laser-engraved pattern includes the following steps: S1. Melt transparent plastic particles to form a molten material, inject the molten material into a mold for injection molding, and then demold to form an interior panel blank. S2. Spray color paint on the interior panel blank to obtain an interior panel. The purpose of spraying color paint is to make the interior panel blank have different colors, so that interior panels of different colors can be processed and produced according to the needs of automobile manufacturers. S3. Laser-engrave on the interior panel. S4. After laser-engraving is completed, spray clear varnish on the interior panel. S5. Package.

[0004] In the automotive industry, laser-engraved patterns have requirements for light transmission so that the laser-engraved patterns can be clearly visible. However, for the automotive interior panels processed by the existing preparation method, as Figure 1 shown, the laser-engraved patterns on the orange and black interior panels are clearly visible, but the clarity of the laser-engraved patterns on the white interior panel is significantly lower than that of the laser-engraved patterns on the orange and black interior panels. The brightness of the laser-engraved patterns on the white interior panel is worse than that of the laser-engraved patterns on the orange and black interior panels, and the visibility of the laser-engraved patterns on the white interior panel is not high.

[0005] In order to improve the brightness and clarity of the laser-engraved patterns on the white interior panel, the inventor has made some improvements, such as adjusting the process parameters of laser-engraving, but the improvement effects are not ideal. Summary of the Invention

[0006] The present invention aims to provide an automotive interior panel and a preparation method thereof to solve the problem that the clarity and brightness of the laser-engraved patterns on the white automotive interior panel are relatively poor compared with those of other colors of automotive interior panels.

[0007] To achieve the above object, the present invention adopts the following technical solution: An automotive interior panel includes an interior panel blank and white paint sprayed on the interior panel blank; a laser-engraved pattern is provided on the automotive interior panel; the raw materials of the interior panel blank include plastic particles and color powder, the color powder is white plastic color powder, and the weight ratio of the plastic particles to the color powder is 20:1.

[0008] Preferably, as an improvement, the plastic particles include polycarbonate.

[0009] Preferably, as an improvement, the plastic particles further include acrylonitrile-butadiene-styrene copolymer.

[0010] Preferably, as an improvement, the wall thickness of the laser-engraved pattern is 1.3 - 1.8 mm.

[0011] Preferably, as an improvement, the wall thickness of the laser-engraved pattern is 1.5 mm.

[0012] Preferably, as an improvement, the automotive interior panel is a switch panel for the automotive door.

[0013] To achieve the above object, the present invention also adopts the following technical solution: A preparation method for an automotive interior panel, comprising the following steps: S1. Prepare the raw materials for the interior panel material: The raw materials for the interior panel material include plastic particles and color powder. The color powder is white plastic color powder, and the weight ratio of the plastic particles to the color powder is 20:1; S2. Inject the raw materials for the interior panel material into an interior panel material; S3. Spray painting treatment: Spray a primer and a white paint on the interior panel material respectively to obtain the automotive interior panel; the thickness of the primer is 15 - 20 μm, and the thickness of the paint is 18 ± 3 μm; S4. Laser engraving production: Perform laser engraving on the automotive interior panel; S5. Spray clear varnish and bake.

[0014] Preferably, as an improvement, in S4, the laser engraving power is 90 - 100 W, the laser engraving speed is 800 - 900 mm / s, and the laser engraving frequency is 88 - 95 kHz.

[0015] Preferably, as an improvement, in S3, the diameter of the spray gun used for spray painting is 0.8 - 1.3 mm.

[0016] Preferably, as an improvement, after spraying the primer, the baking temperature is 70 - 80 °C and the baking time is 30 min; after spraying the paint, the baking temperature is 70 - 80 °C and the baking time is 30 min; after spraying the clear varnish, the baking temperature is 70 - 80 °C and the baking time is 120 min.

[0017] By adjusting the ratio of the plastic particles and the color powder, and setting the weight ratio of the plastic particles to the color powder to 20:1, the present invention makes the laser-engraved pattern on the automotive interior panel more clearly visible, with higher visibility and increased brightness.

[0018] The solution of this patent overcomes the technical prejudice in the industry when solving the problem that the clarity and brightness of the laser-engraved pattern on the white automotive interior panel are relatively poor compared to those on automotive interior panels of other colors. In this industry, automotive interior panels include interior panel materials and paint sprayed on the interior panel materials. When the problem of unclear laser-engraved patterns occurs, those skilled in the art first think of adjusting the laser-engraving parameters. However, after adjusting the laser-engraving parameters, the clarity of the laser-engraved pattern has not been improved; secondly, they think of adjusting the paint. Because only white automotive interior panels have the problem of unclear laser-engraved patterns, while automotive interior panels of other colors (such as black or orange) do not have the problem of unclear laser-engraved patterns. The main difference between automotive interior panels of different colors is the color of the sprayed paint, which makes the automotive interior panels show different colors, while the interior panel materials are the same. Therefore, when those skilled in the art face the technical problem of this patent, they usually think that it has a great relationship with the sprayed paint, especially with the color of the paint. For this reason, when the inventor was solving the technical problem of this patent, he also adjusted the paint spraying, such as adjusting the paint spraying amount, paint component ratio, etc., but the problem was not solved in the end. Those skilled in the art, when facing the problem of this patent, do not think that it is caused by the interior panel material (the existing technical prejudice), after all, automotive interior panels of other colors (such as black or orange) do not have this problem when using the same interior panel material. In this patent, the inventor adjusted the proportion of the raw materials of the interior panel material, and finally improved the brightness and clarity of the laser-engraved pattern, solving the difficult problem in this industry, so this patent is applied for.

[0019] In addition, the wall thickness of the laser-engraved pattern is 1.3 - 1.8 mm. Compared with the existing about 3 mm, the wall thickness of the laser-engraved pattern is greatly reduced, which is more conducive to the penetration of light, and thus is also conducive to improving the brightness and clarity of the laser-engraved pattern. Description of the Drawings

[0020] Figure 1 It is a comparison diagram of the clarity and brightness of the laser-engraved patterns on the orange, black, and white automotive interior door panel switch panels in the prior art.

[0021] Figure 2 It is a comparison diagram of the clarity and brightness of the laser-engraved patterns on the white automotive interior door panel switch panel before and after improvement. Among them, A is the white automotive interior door panel switch panel after improvement, and B is the existing white automotive interior door panel switch panel. Detailed Description of the Invention

[0022] The following is a further detailed description through specific embodiments: Embodiment

[0023] An automotive interior panel (in this embodiment, specifically illustrated by taking the switch panel of the automotive interior door panel as an example), includes the interior panel material and white paint sprayed on the interior panel material; there is a laser engraving pattern on the automotive interior panel, and the wall thickness of the laser engraving pattern (the thickness of the automotive interior panel at the laser engraving pattern) is 1.3 - 1.8 mm, specifically 1.5 mm; the raw materials of the interior panel material include plastic particles and color powder, the color powder is white plastic color powder, and the weight ratio of plastic particles to color powder is 20:1. The plastic particles include polycarbonate (PC) and acrylonitrile-butadiene-styrene copolymer (ABS), and the weight ratio of polycarbonate to acrylonitrile-butadiene-styrene copolymer is 7:3.

[0024] This embodiment also discloses a preparation method of an automotive interior panel, including the following steps: S1. Prepare the raw materials of the interior panel material: The raw materials of the interior panel material include plastic particles and color powder, the color powder is white plastic color powder, and the weight ratio of plastic particles to color powder is 20:1; the plastic particles include polycarbonate (PC) and acrylonitrile-butadiene-styrene copolymer (ABS), and the weight ratio of polycarbonate to acrylonitrile-butadiene-styrene copolymer is 7:3; S2. Inject the raw materials of the interior panel material into the interior panel material (the interior panel material is the product after injection molding and demolding, and it has not been painted yet); in this step, the drying temperature of the material: 100 ± 5 °C, the injection pressure: 65 ± 3 bar, the melting temperature of the material: 300 ± 10 °C; S3. Painting treatment: Spray the primer and white paint on the interior panel material respectively to obtain the automotive interior panel; among them, the thickness of the primer is 15 - 20 μm, the color of the primer is black (matte) (such as the paint of model YSD-CN101-281977C), when in use, the volume ratio of the primer to the thinner (thinner model: YSD-CN000-20000X) is 10:(8 - 10), the spraying viscosity: the hand spraying second number is 10 ± 0.5 s, the surface drying temperature is 50 - 65 °C, the time is 8 - 10 min, the baking temperature is 70 - 80 °C, and the baking time is 30 min; Among them, the thickness of the paint is 18 ± 3 μm, the color of the paint is centimeter white (such as the paint of model YSD-CN201-285107A), when in use, the volume ratio of the paint to the thinner (thinner model: YSD-CN000-20000X) is 10:(8 - 10), the spraying viscosity: the hand spraying second number is 10 ± 0.5 s, the surface drying temperature is 50 - 65 °C, the time is 8 - 10 min, the baking temperature is 70 - 80 °C, and the baking time is 30 min; S4. Laser Engraving: Perform laser engraving on the automotive interior panel. The laser engraving power is 90 - 100W, specifically 95W; the laser engraving speed is 800 - 900mm / s, specifically 850mm / s; the laser engraving frequency is 88 - 95kHz, specifically 90kHz; the pulse width is 9us, the first pulse is 180us, and the dotting time is 1ms. S5. Clear Coat Spraying: The clear coat is a soft-touch paint (such as paint model YSD-CN003-29004C). The thickness of the clear coat is 30 - 35um. When in use, the ratio of the clear coat, curing agent (model YSD-CN008-2909), and thinner (model YSD-CN000-2900A) is 10:1:(5 - 6). The spraying viscosity: the hand-spraying second number is 11 ± 0.5s, the surface drying temperature is 50 - 65 degrees Celsius for 8 - 10min, the baking temperature is 70 - 80 degrees Celsius, and the baking time is 120min.

[0025] During the spraying processes of the above S3 and S5, the painting requirements are as follows: the diameter of the spray gun is 0.8 - 1.3mm, the air pressure is 3 - 4kg / cm 2 , the temperature is 20 ± 5°C, and the humidity is 40 - 80%.

[0026] In this embodiment, by improving the ratio of the raw materials of the interior panel material, the weight ratio of plastic particles to color powder is set to 20:1, and the color of the interior panel material injection-molded is defined as porcelain white. The laser engraving pattern on the automotive interior panel in this embodiment is as shown in Figure 2 A.

[0027] Comparative Example 1 The difference between Comparative Example 1 and the embodiment is that: the weight ratio of plastic particles to color powder adopts the prior art ratio, and the weight ratio of plastic particles to color powder is 50:1. The rest is the same as in Example 1. The color of the interior panel material injection-molded in this comparative example is defined as milky white. The laser engraving pattern in this comparative example is as shown in Figure 2 B or Figure 1 the rightmost picture in.

[0028] Comparative Example 2 The difference between Comparative Example 2 and the embodiment is that: the weight ratio of plastic particles to color powder is 50:1. The color of the interior panel material injection-molded in this comparative example is defined as milky white. The color of the color paint is orange. The laser engraving pattern in this comparative example is as shown in Figure 1 the leftmost picture in.

[0029] Comparative Example 3 The difference between Comparative Example 3 and the embodiment is that: the weight ratio of plastic particles to color powder is 50:1. The color of the interior panel material injection-molded in this comparative example is defined as milky white. The color of the color paint is black. The laser engraving pattern in this comparative example is as shown in Figure 1as shown in the middle picture therein.

[0030] Comparative Example 4 The difference between Comparative Example 3 and the Example is that: the weight ratio of plastic particles to toner is 50:1. The color of the interior panel material injection molded in this comparative example is defined as milky white. Different adjustment attempts are made on the laser engraving parameters. Specifically, attempts are made on multiple groups of different laser engraving parameters in the following table.

[0031] After the laser engraving parameters are adjusted in this comparative example, the brightness and clarity of the laser engraved pattern are Figure 2 basically the same as the pattern in B, and no obvious change occurs. Therefore, adjusting the laser engraving parameters cannot solve the technical problem of this application.

[0032] Comparative Example 5 The difference between this comparative example and the Example is that the thickness of the primer is 10um and the thickness of the topcoat is 15um. The rest is the same as the Example. The brightness and clarity of the laser engraved pattern in this comparative example are Figure 2 basically the same as the pattern in B, and no obvious change occurs. Therefore, adjusting the paint thickness cannot solve the technical problem of this application.

[0033] Comparative Example 6 The difference between this comparative example and the Example is that when in use, the volume ratio of the primer to the thinner (thinner model: YSD-CN000-20000X) is 10:5, and the volume ratio of the topcoat to the thinner (thinner model: YSD-CN000-20000X) is 10:5. The rest is the same as the Example.

[0034] Comparative Example 7 The difference between this comparative example and the Example is that when in use, the volume ratio of the primer to the thinner (thinner model: YSD-CN000-20000X) is 10:15, and the volume ratio of the topcoat to the thinner (thinner model: YSD-CN000-20000X) is 10:15. The rest is the same as the Example.

[0035] The brightness and clarity of the laser engraved pattern in Comparative Examples 6 - 7 are Figure 2 basically the same as the pattern in B, and no obvious change occurs. Therefore, adjusting the ratio of the paint to the thinner cannot solve the technical problem of this application.

[0036] In summary, through comparison of Comparative Examples 1 - 7 and the Example, it can be seen that by adjusting the weight ratio of plastic particles to toner from the previous 50:1 to 20:1, the clarity and brightness of the laser engraved pattern are greatly improved, while adjusting the laser engraving parameters and the paint ratio cannot solve the technical problem.

[0037] The above are only embodiments of the present invention, and common general technical solutions and / or characteristics in the solutions are not described in detail herein. It should be noted that for those skilled in the art, without departing from the technical solutions of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope claimed in this application shall be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. An automotive interior panel, comprising an interior panel material and white paint sprayed on the interior panel material; a laser engraving pattern is provided on the automotive interior panel; characterized in that: The raw materials of the interior panel material include plastic particles and color powder. The color powder is white plastic color powder, and the weight ratio of the plastic particles to the color powder is 20:

1.

2. The automotive interior panel according to claim 1, characterized in that: The plastic particles include polycarbonate.

3. The automotive interior panel according to claim 2, characterized in that: The plastic particles also include acrylonitrile-butadiene-styrene copolymer.

4. The automotive interior panel according to claim 1, wherein: The wall thickness of the laser-engraved pattern is 1.3 - 1.8 mm.

5. The automotive interior panel according to claim 4, wherein: The wall thickness of the laser-engraved pattern is 1.5 mm.

6. The automotive interior panel according to claim 1, characterized in that: The automotive interior panel is the switch panel of the car door.

7. A method for preparing an automotive interior panel according to any one of claims 1-6, characterized in that: It includes the following steps: S1. Prepare the raw materials of the interior panel material: The raw materials of the interior panel material include plastic particles and color powder. The color powder is white plastic color powder, and the weight ratio of the plastic particles to the color powder is 20:

1. S2. Inject the raw materials of the interior panel material into the interior panel material. S3. Painting treatment: After spraying the primer and white paint on the interior panel material respectively, the automotive interior panel is obtained. The thickness of the primer is 15 - 20 μm, and the thickness of the paint is 18 ± 3 μm. S4. Laser engraving production: Conduct laser engraving on the automotive interior panel. S5. Spray clear paint and bake.

8. The preparation method of an automotive interior panel according to claim 7, characterized in that: In S4, the laser engraving power is 90 - 100 W, the laser engraving speed is 800 - 900 mm / s, and the laser engraving frequency is 88 - 95 kHz.

9. The preparation method of an automotive interior panel according to claim 7, characterized in that: In S3, the diameter of the spray gun used for painting is 0.8 - 1.3 mm.

10. The preparation method of an automotive interior panel according to claim 7, characterized in that: After spraying the primer, the baking temperature is 70 - 80 °C and the baking time is 30 min; after spraying the paint, the baking temperature is 70 - 80 °C and the baking time is 30 min; after spraying the clear paint, the baking temperature is 70 - 80 °C and the baking time is 120 min.

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