A chameleon coating structure suitable for electrostatic spraying on automated lines

Abstract

The utility model discloses a chameleon coating structure suitable for electrostatic spraying of an automated line, using two methods, the first is a black conductive primer layer + chameleon base paint layer + varnish layer, the second is a primer layer + black conductive paint layer + chameleon base paint layer + varnish layer; the black conductive primer layer or the black conductive paint layer can be used for an automated coating line to electrostatically spray the workpiece. Compared with the air spraying method, the electrostatic spraying has a higher coating efficiency in one spraying, and a coating with good coverage and uniform film thickness can be obtained. The coating utilization rate of air spraying is 20%, and the coating utilization rate of electrostatic spraying is 40-50%. In addition, if powder coating is used for electrostatic spraying, not only is the spraying efficiency high, but also the powder utilization rate is as high as 99% because the powder can be recycled.

Description

Technical Field

[0001] The utility model relates to a chameleon coating structure, in particular to a chameleon coating structure suitable for electrostatic spraying of an automated line. Background Art

[0002] Chameleon paint is a paint containing effect pigment angular-chromatic powder (also known as chameleon powder, chameleon pearl pigment, etc.); the coating obtained by spraying chameleon paint changes color with the change of observation angle, and has a beautiful color-changing effect.

[0003] Regarding the chameleon coating structure, Chinese patent document CN 117304761 A (application number 202311470936.6) discloses a water-based chameleon baking paint coating, which includes a primer layer and a topcoat layer covering the primer layer, and the topcoat layer includes chameleon powder; the primer layer includes the following components in parts by weight: 65-85 parts of water-based acrylic resin, 0.15-0.25 parts of dimethylethanolamine DMEA, 9-11 parts of deionized water, 1.5-2.5 parts of diethylene glycol butyl ether, 1.5-2.5 parts of ethylene glycol butyl ether, 0.5-1.5 parts of special defoaming agent, 10-12 parts of amino resin, 0.15-0.25 parts of wetting agent, 1.5-2.5 parts of adhesion promoter, and 9-11 parts of carbon black slurry.

[0004] Chinese patent document CN 109382289A (application number 201811209500.0) discloses a highly weather-resistant chameleon color-coated plate and its preparation method. The color-coated plate includes a topcoat layer, a bottomcoat layer, a first passivation layer, a substrate, a second passivation layer and a backcoat layer stacked in sequence; a pigment is arranged in the bottomcoat layer, and an angle-dependent color powder is arranged in the topcoat layer, so that the color-coated plate presents a variety of colors, and the colors displayed are different at different viewing angles; the bottomcoat layer includes the following raw materials in parts by weight: 85-90 parts of propyne-polyvinylidene fluoride copolymer, 2-8 parts of pigment, 16-20 parts of butadiene-methyl acrylate copolymer, 6-10 parts of fumaric acid, and 4-6 parts of polyvinyl alcohol.

[0005] It can be seen that the composition of the above primer or base coating does not contain conductive powder. If the primer layer is not a conductive primer layer, the chameleon paint can only be sprayed by air spraying, and the chameleon paint cannot be electrostatically sprayed on an automated line. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a chameleon coating structure suitable for electrostatic spraying of an automated line.

[0007] The technical solution to achieve the purpose of the utility model is a chameleon coating structure suitable for electrostatic spraying on an automated line, characterized in that it includes a conductive structure layer, a chameleon base paint layer and a clear varnish layer arranged from the inside to the outside on the surface of the workpiece substrate to be sprayed.

[0008] In the first technical solution, the conductive structure layer is a black conductive primer layer, and the chameleon coating structure includes a black conductive primer layer, a chameleon base paint layer and a clear varnish layer which are sequentially coated from the inside to the outside on the surface of the workpiece substrate to be sprayed.

[0009] The black conductive primer layer has the effects of covering substrate defects and providing good substrate adhesion and conductivity.

[0010] Optionally, the thickness of the black conductive primer layer is 20 μm to 40 μm; the thickness of the chameleon base paint layer is 10 μm to 20 μm; and the thickness of the overprint varnish layer is 30 μm to 50 μm.

[0011] Further optionally, the thickness of the black conductive primer layer is 20 μm to 30 μm; the thickness of the chameleon base paint layer is 15 μm to 20 μm; and the thickness of the overprint varnish layer is 35 μm to 45 μm.

[0012] The black conductive primer layer is a coating layer including black color paste and conductive powder.

[0013] The second technical solution is that the conductive structure layer is a black conductive paint layer, and the chameleon coating structure includes a primer layer, a black conductive paint layer, a chameleon base paint layer and a clear varnish layer which are sequentially coated from the inside to the outside on the surface of the workpiece substrate to be sprayed.

[0014] The primer layer covers substrate defects and provides good substrate adhesion; the black conductive paint layer provides conductivity.

[0015] Optionally, the thickness of the primer layer is 20 μm to 40 μm; the thickness of the black conductive paint layer is 10 μm to 20 μm; the thickness of the chameleon base paint layer is 10 μm to 20 μm; and the thickness of the clear varnish layer is 30 μm to 50 μm.

[0016] Further optionally, the thickness of the primer layer is 20 μm to 30 μm; the thickness of the black conductive paint layer is 15 μm to 20 μm; the thickness of the chameleon base paint layer is 15 μm to 20 μm; and the thickness of the clear varnish layer is 35 μm to 45 μm.

[0017] The black conductive paint layer is a coating layer including black color paste and conductive powder.

[0018] The utility model has positive effects:

[0019] (1) The chameleon coating structure of the present invention is suitable for electrostatic spraying on an automated line in two ways: the first is a black conductive primer layer + a chameleon base paint layer + a clear varnish layer; the second is a primer layer + a black conductive paint layer + a chameleon base paint layer + a clear varnish layer; that is, a conductive structural layer is provided below the chameleon base paint layer, and after the black conductive primer layer or the conductive layer is conductive, the workpiece can be electrostatically sprayed on the automated line.

[0020] (2) Compared with air spraying, electrostatic spraying has a higher coating efficiency in one spraying, and can obtain a coating with good coverage and uniform film thickness. For example, the paint utilization rate of air spraying is 20%, while the paint utilization rate of electrostatic spraying is 40-50%.

[0021] In addition, if electrostatic spraying of powder coating is used, not only is the spraying efficiency high, the powder can be recycled, and the powder utilization rate is as high as 99%. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the first structure of the utility model.

[0023] Figure 2 This is a second structural schematic diagram of the utility model.

[0024] The markings in the above drawings are as follows: black conductive primer layer 1, primer layer 2, black conductive paint layer 3, chameleon base color paint layer 4, overprint varnish layer 5, substrate 6. DETAILED DESCRIPTION

[0025] The following describes some of the multiple possible embodiments of the utility model, which are intended to provide a basic understanding of the utility model, and are not intended to confirm the key or decisive elements of the utility model or to limit the scope of protection. It is easy to understand that according to the technical solution of the utility model, without changing the essential spirit of the utility model, a person skilled in the art can propose other interchangeable implementations. Therefore, the following specific implementation methods and drawings are only exemplary descriptions of the technical solution of the utility model, and should not be regarded as the entirety of the utility model or as a limitation or restriction of the technical solution of the utility model.

[0026] (Example 1)

[0027] See Figure 1 The chameleon coating structure suitable for automated line electrostatic spraying in this embodiment includes a black conductive primer layer 1, a chameleon base color paint layer 4 and a clear varnish layer 5 which are sequentially coated from the inside to the outside on the surface of a workpiece substrate 6 to be sprayed.

[0028] The coating material used for the black conductive primer layer 1 includes conductive powder and black color paste, and can be prepared by using conductive primer and black color paste.

[0029] The chameleon base paint layer 4 contains effect pigments such as angle-dependent color powder or chameleon powder, chameleon pearl pigment, etc.

[0030] The thickness of the black conductive primer layer 1 is 20 μm to 40 μm, preferably 20 μm to 30 μm.

[0031] The thickness of the chameleon base paint layer 4 is 10 μm to 20 μm, preferably 15 μm to 20 μm.

[0032] The thickness of the overprint varnish layer 5 is 30 μm to 50 μm, preferably 35 μm to 45 μm.

[0033] In the chameleon coating structure of this embodiment, the coating used for the black conductive primer layer 1 is prepared by using the S87-3C brand conductive primer and black color paste produced by Changzhou Wujin Chenguang Metal Coating Co., Ltd.; the chameleon paint used for the chameleon base paint layer 4 is the GREEN / PURPLE190 brand coating produced by CHROMAFLAIR Company of the United States.

[0034] Using the structure of this embodiment, the steps for applying chameleon effect to the non-metallic covering parts of a car are as follows: place the workpiece on an automated spraying line, first spray black conductive primer on the non-metallic covering parts to obtain a black conductive primer layer 1 with a thickness of 28 μm, which not only covers the defects of the substrate, provides good adhesion to the substrate, but also has conductivity; then electrostatic spraying is used to electrostatically spray chameleon base paint to obtain a chameleon base paint layer 4 with a thickness of 20 μm; finally, a finishing varnish is sprayed on the chameleon base paint layer 4, and after drying, a finishing varnish layer 5 with a thickness of 45 μm is obtained.

[0035] (Example 2)

[0036] See Figure 2 The chameleon coating structure suitable for automated line electrostatic spraying in this embodiment includes a primer layer 2, a black conductive paint layer 3, a chameleon base color paint layer 4 and a clear varnish layer 5 from the inside to the outside starting from the surface of the workpiece substrate 6 to be sprayed.

[0037] The paint used for the primer layer 2 is a commercially available primer, and the color of the primer layer 2 is not limited.

[0038] The coating used for the conductive layer 3 is prepared by mixing conductive coating and black paste.

[0039] The chameleon base paint layer 4 contains effect pigments such as angle-dependent color powder or chameleon powder, chameleon pearl pigment, etc.

[0040] The thickness of the primer layer 2 is 20 μm to 40 μm, preferably 20 μm to 30 μm.

[0041] The thickness of the black conductive paint layer 3 is 10 μm to 20 μm, preferably 15 μm to 20 μm.

[0042] The thickness of the chameleon base paint layer 4 is 10 μm to 20 μm, preferably 15 μm to 20 μm.

[0043] The thickness of the overprint varnish layer 5 is 30 μm to 50 μm, preferably 35 μm to 45 μm.

[0044] In the chameleon coating structure of this embodiment, the coating used for the primer layer 2 is the S87-3 primer produced by Changzhou Wujin Chenguang Metal Coating Co., Ltd.; the coating used for the black conductive paint layer 3 is a mixture of conductive coating and black color paste; the chameleon coating used for the chameleon base color paint layer 4 is the same as that in Example 1.

[0045] Using the structure of this embodiment, the steps for applying chameleon effect to the non-metallic covering parts of a car are as follows: first, spray primer on the non-metallic covering parts, and obtain a primer layer 2 with a thickness of 30 μm after drying, in order to cover the defects of the substrate and provide good substrate adhesion; place the workpiece on an automated spraying line, spray black conductive paint on the primer layer 2, and obtain a black conductive paint layer 3 with a thickness of 18 μm, which provides conductivity; electrostatically spray chameleon base paint on the black conductive paint layer 3 to obtain a chameleon base paint layer 4 with a thickness of 20 μm; finally, spray a finishing varnish on the chameleon base paint layer 4, and obtain a finishing varnish layer 5 with a thickness of 40 μm after drying.

[0046] In order to be suitable for electrostatic spraying on an automated line, the chameleon coating structure of the utility model first forms a conductive structure layer on the substrate before the chameleon coating is sprayed, and two methods are adopted: the first is the black conductive primer layer + chameleon base color paint layer + clear varnish layer structure shown in Example 1, and the second is the primer layer + black conductive layer + chameleon base color paint layer + clear varnish layer structure shown in Example 2; the black conductive primer layer or the black conductive layer can be used for electrostatic spraying of workpieces on an automated line.

Claims

1. A chameleon coating structure suitable for electrostatic spraying in an automated line, characterized in that: It comprises a conductive structure layer, a chameleon base paint layer (4) and a finishing varnish layer (5) which are arranged from the inside to the outside on the surface of a workpiece substrate (6) to be sprayed.

2. The chameleon coating structure suitable for electrostatic spraying in an automated line according to claim 1, characterized in that: The conductive structure layer is a black conductive primer layer (1), and the chameleon coating structure comprises a black conductive primer layer (1), a chameleon base color paint layer (4), and a clear varnish layer (5) which are sequentially coated from the inside to the outside on the surface of a workpiece substrate (6) to be sprayed.

3. The chameleon coating structure suitable for electrostatic spraying in an automated line according to claim 2, characterized in that: The thickness of the black conductive primer layer (1) is 20 μm to 40 μm; the thickness of the chameleon base paint layer (4) is 10 μm to 20 μm; and the thickness of the overcoat varnish layer (5) is 30 μm to 50 μm.

4. The chameleon coating structure suitable for electrostatic spraying in an automated line according to claim 3 is characterized in that: The thickness of the black conductive primer layer (1) is 20 μm to 30 μm; the thickness of the chameleon base paint layer (4) is 15 μm to 20 μm; and the thickness of the overcoat varnish layer (5) is 35 μm to 45 μm.

5. The chameleon coating structure suitable for electrostatic spraying in an automated line according to claim 1, characterized in that: The conductive structural layer is a black conductive paint layer (3), and the chameleon coating structure comprises a primer layer (2), a black conductive paint layer (3), a chameleon base color paint layer (4), and a clear varnish layer (5) which are sequentially coated from the inside to the outside on the surface of a workpiece substrate (6) to be sprayed.

6. The chameleon coating structure suitable for electrostatic spraying in an automated line according to claim 5, characterized in that: The thickness of the primer layer (2) is 20 μm to 40 μm; the thickness of the black conductive paint layer (3) is 10 μm to 20 μm; the thickness of the chameleon base paint layer (4) is 10 μm to 20 μm; and the thickness of the overcoat varnish layer (5) is 30 μm to 50 μm.

7. The chameleon coating structure suitable for electrostatic spraying in an automated line according to claim 6, characterized in that: The thickness of the primer layer (2) is 20 μm to 30 μm; the thickness of the black conductive paint layer (3) is 15 μm to 20 μm; the thickness of the chameleon base paint layer (4) is 15 μm to 20 μm; and the thickness of the overcoat varnish layer (5) is 35 μm to 45 μm.

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