The primer and top coat of spray paint are different from metal, and low-temperature curing uv paint (usually 60~80℃) should be used. Common paint surface materials are polyurethane (PU) and acrylic resin coatings. If the required coating surface has a metallic luster, spray a layer of silver primer under the transparent color topcoat.
In order to improve the abradability of the coating, a layer of UV-cured uv paint is usually applied to the surface to improve the abradability of the coating. The brightness of uv coatings needs to be achieved through different ratios of brightness.
There are two kinds of spray molding process, manual spraying and automatic spraying. Painting: The thickness and quality of the coating are not easy to control. It is suitable for initial spraying materials and conductive coatings on the inner surface. Self-spraying: multiple guns (6, 8) spray guns. Different spray angles can be adjusted to make the thickness of the sprayed surface uniform, and it can also be sprayed by a manipulator. Note: The code, color and surface roughness of the substrate should be determined before spraying.
The thickness of the coating is to stabilize the quality of the coating, such as gloss and abrasiveness, and the thickness of the coating should be controlled. Directly measure the thickness of the coating with a coating thickness gauge. Silver (used to show metallic luster) is thinner.
Color difference meter and brightness meter can be used to detect the color and luminosity of spray paint. This method can be used for data quantification, but the accuracy is poor. The commonly used detection method is the color palette comparison method.
After the swatch design department specifies the color and brightness requirements of the paint through the color code, swatch, etc., the paint manufacturer (or cooperates with the spray manufacturer) prepares the paint and automatically sprays it on the spray line. The test samples will be fully inspected by the design department and signed by the design department after passing the test, and the paint code will be determined at the same time. If the design requirements are not met, the process can be determined repeatedly.
Carry out the abrasion and anti-stripping test on the "RCA Abrasion Tester". When the anti-stripping rate is measured, the anti-stripping rate is tested with a 100-grid knife and 3M tape.
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