Spraying process for wheel with luminous paint on surface

Abstract

The invention belongs to the technical field of wheel coating, and relates to a spraying process of a wheel with luminous paint on the surface, which comprises the following steps of: spraying ash bottom powder and primer after the wheel is pretreated, adjusting the luminous paint to the construction viscosity of 14-18 seconds, coating 4 cups, spraying the paint at the distance of 150-250mm from a spray gun to the surface of the wheel to be sprayed, spraying one layer of luminous paint at first with the film thickness of 10-15 microns, spraying the second layer of luminous paint after 5-10 seconds with the film thickness of 10-15 microns, the luminous paint is double-component polyurethane luminous paint; and then spraying transparent paint, leveling, heating and curing. According to the spraying process disclosed by the invention, an existing spraying line is not adjusted, and the thicknesses of the primer, the luminous paint and the transparent paint are adjusted, so that the thickness of the luminous paint layer in the middle adapts to energy storage and luminescence, and a good luminous appearance is obtained.

Description

Technical Field

[0001] The invention belongs to the technical field of wheel painting, relates to painted wheels, and in particular to a spraying process for wheels with luminous paint on the surface. Background Art

[0002] At present, due to the popularization of the concept of pursuing personalized consumption, many customers are pursuing car wheels with cool visual effects. In the existing coating process, the spraying materials of the paint on the surface of car wheels show various colors under sunlight or light, but at night when there is no light, the appearance outline of many wheels is almost invisible.

[0003] Luminous paint is a paint that can glow in a dark environment. The principle of luminescence is to store the energy absorbed during the day and release it at night, thereby achieving the phenomenon of luminescence. It emits dazzling colors in the dark night, giving people a refreshing sense of luminescence visually. It has a colorful effect and a strong sense of perspective and three-dimensionality. Because it has no special appearance under light, but can emit light in the dark, it is called luminous paint. After being irradiated with visible light, the luminous paint continues to glow in the dark, expanding the limited monotonous plane into a fantastic multi-dimensional space with strange glow. The decorative effect is colorful and well-arranged. The pattern is realistic, well-layered, delicate, seamless, and does not peel or crack. The base color and the surface color can be freely matched. The patterns of characters, landscapes, flowers, cartoons, etc. can be selected at will. It can also be customized and can be recycled indefinitely. It has a long service life, is non-toxic and harmless, and does not contain radioactive elements. It is a new generation of environmentally friendly decorative paint. Summary of the invention

[0004] In order to obtain a luminous coating effect on the surface of a wheel, the purpose of the present invention is to disclose a spraying process for a wheel with luminous paint on the surface.

[0005] Technical Solution

[0006] A spraying process for a wheel with luminous paint on the surface comprises the following steps:

[0007] (1) After the wheels are pre-treated by degreasing, pickling and passivation, they are sprayed with base powder with a film thickness of 60 to 120 μm;

[0008] (2) Spray primer, the viscosity of the primer is 14 to 18 seconds, apply 4 cups, the film thickness is 15 to 20 μm, and then level it, the leveling temperature is 20 to 60 ° C, and the leveling time is 5 to 8 minutes;

[0009] (3) Adjust the luminous paint to a construction viscosity of 14 to 18 seconds, apply 4 cups, and when spraying the paint, the spray gun is 150 to 250 mm away from the surface of the wheel to be sprayed. First spray a layer of luminous paint with a film thickness of 10 to 15 μm, and then spray the second layer after 5 to 10 seconds with a film thickness of 10 to 15 μm. The luminous paint is a two-component polyurethane luminous paint;

[0010] (4) Leveling, leveling temperature 20 ~ 60 ° C, leveling time 5 ~ 8 minutes;

[0011] (5) Spray transparent paint with a viscosity of 16 to 20 seconds, apply 4 cups, and a film thickness of 15 to 20 μm. Heat and cure.

[0012] In a preferred disclosed embodiment of the present invention, the primer in step (2) is a white matte primer.

[0013] In a preferred disclosed example of the present invention, the two-component polyurethane luminous paint in step (3) consists of two parts: an isocyanate prepolymer and a hydroxyl-containing resin, wherein the isocyanate prepolymer contains 0.1 to 5 wt.% of luminous powder, and the hydroxyl-containing resin contains 0.1 to 5 wt.% of fluorescent powder.

[0014] Furthermore, the luminous powder is rare earth blue-green luminous powder.

[0015] Furthermore, the phosphor is an alkaline earth metal aluminate phosphor.

[0016] Furthermore, the alkaline earth aluminate phosphor is SrAl2O4:Eu, Dy or SrAl2O4:Eu or Sr4Al 14 O 25 :Eu, Dy or CaAl2O4:Eu, Nd.

[0017] In the preferred disclosed example of the present invention, when using step (3), the luminous powder and the fluorescent powder are first dispersed in the corresponding components by high-speed stirring, and then the two components are mixed evenly, and the mixture is used up within 3 to 5 hours.

[0018] In the preferred disclosed example of the present invention, the heating curing in step (5) has a curing temperature of 140-150° C. and a curing time of 35-45 min.

[0019] Painting key points:

[0020] The wheels are first cleaned by normal degreasing, pickling, passivation and other pre-treatments. Whether the pre-treatment is clean or not has a great impact on the performance and life of the paint film; spraying gray primer to cover surface defects can enhance adhesion, weather resistance and paint life; white (matte) primer is preferred when spraying primer, and leveling must be performed after spraying to allow the primer to have sufficient leveling time, otherwise it is easy to wrinkle or even infiltrate the primer and cause peeling. Luminous paint can only be sprayed after this process is completed. Luminous paint should be fully stirred before use. For the sake of caution, a small area should be tried before use; when spraying luminous paint, the light storage capacity is stronger as the film thickness increases, that is, the brightness at night is better); spraying transparent paint to increase the gloss of the wheel surface, make the luminous paint surface more beautiful, and last longer; baking and curing, so that all paints are completely glued and the color is fixed.

[0021] The technical properties of luminous paint mainly include: ① flexibility 1mm; ② adhesion level 0; ③ impact strength 50kg / cm; ④ drying time, surface drying 2h, actual drying 24h; ⑤ luminous brightness (10 minutes afterglow) 300mcd / ㎡; ⑥ afterglow time 200min.

[0022] Beneficial Effects

[0023] The present invention is directed to a two-component polyurethane luminous paint, and discloses a spraying process for a wheel with luminous paint on the surface. Before use, luminous powder and fluorescent powder need to be added to the corresponding components and dispersed evenly, and the wheel is pre-treated and sprayed with a primer so that the surface has no defects and is better bonded with the luminous paint. The spraying process does not adjust the existing spraying line, but adjusts the thickness of the primer, luminous paint and transparent paint so that the thickness of the luminous paint layer in the middle is adapted to energy storage and luminescence, thereby obtaining a good luminous appearance. DETAILED DESCRIPTION

[0024] The present invention is described in detail below in conjunction with the embodiments so that those skilled in the art can better understand the present invention, but the present invention is not limited to the following embodiments.

[0025] Example 1

[0026] A spraying process for a wheel with luminous paint on the surface comprises the following steps:

[0027] (1) After the wheels are pre-treated by degreasing, pickling and passivation, they are sprayed with base powder with a film thickness of 60 to 120 μm;

[0028] (2) Spray white matte primer with a viscosity of 14 to 18 seconds, apply 4 cups, film thickness of 15 to 20 μm, and then level it. The leveling temperature is 20 to 60 ° C and the leveling time is 5 to 8 minutes;

[0029] (3) The luminous paint is adjusted to a construction viscosity of 14 to 18 seconds, and 4 cups are applied. When spraying the paint, the spray gun is 150 to 250 mm away from the surface of the wheel to be sprayed. First, a layer of luminous paint is sprayed, and the film thickness is 10 to 15 μm. After 5 to 10 seconds, a second layer is sprayed, and the film thickness is 10 to 15 μm. The luminous paint is a two-component polyurethane luminous paint, which contains 0.1 to 5 wt.% of luminous powder in the isocyanate prepolymer and 0.1 to 5 wt.% of fluorescent powder in the hydroxyl-containing resin;

[0030] (4) Leveling, leveling temperature 20 ~ 60 ° C, leveling time 5 ~ 8 minutes;

[0031] (5) Spray transparent paint with a viscosity of 16 to 20 seconds, apply 4 cups, and a film thickness of 15 to 20 μm. Heat and cure, and the result is obtained. The curing temperature is 140 to 150°C and the time is 35 to 45 minutes.

[0032] Example 2

[0033] A spraying process for a wheel with luminous paint on the surface comprises the following steps:

[0034] (1) After the wheels are pre-treated by degreasing, pickling and passivation, they are sprayed with base powder with a film thickness of 60 to 120 μm;

[0035] (2) Spray white matte primer with a viscosity of 14 to 18 seconds, apply 4 cups, film thickness of 15 to 20 μm, and then level it. The leveling temperature is 20 to 60 ° C and the leveling time is 5 to 8 minutes;

[0036] (3) Adjust the luminous paint to a construction viscosity of 14 to 18 seconds, apply 4 cups, and when spraying the paint, the spray gun is 150 to 250 mm away from the surface of the wheel to be sprayed. First spray a layer of luminous paint with a film thickness of 10 to 15 μm, and then spray the second layer after 5 to 10 seconds with a film thickness of 10 to 15 μm. The luminous paint is a two-component polyurethane luminous paint, which contains 0.1 to 5 wt.% of rare earth blue-green luminous powder in the isocyanate prepolymer and 0.1 to 5 wt.% of aluminate alkaline earth metal fluorescent powder in the hydroxyl-containing resin;

[0037] (4) Leveling, leveling temperature 20 ~ 60 ° C, leveling time 5 ~ 8 minutes;

[0038] (5) Spray transparent paint with a viscosity of 16 to 20 seconds, apply 4 cups, and a film thickness of 15 to 20 μm. Heat and cure, and the result is obtained. The curing temperature is 140 to 150°C and the time is 35 to 45 minutes.

[0039] Example 3

[0040] A spraying process for a wheel with luminous paint on the surface comprises the following steps:

[0041] (1) After the wheels are pre-treated by degreasing, pickling and passivation, they are sprayed with base powder with a film thickness of 60 to 120 μm;

[0042] (2) Spray white matte primer with a viscosity of 14 to 18 seconds, apply 4 cups, film thickness of 15 to 20 μm, and then level it. The leveling temperature is 20 to 60 ° C and the leveling time is 5 to 8 minutes;

[0043] (3) The luminous paint is adjusted to a construction viscosity of 14 to 18 seconds, and 4 cups are applied. When spraying the paint, the spray gun is 150 to 250 mm away from the surface of the wheel to be sprayed. First, a layer of luminous paint is sprayed, and the film thickness is 10 to 15 μm. After 5 to 10 seconds, a second layer is sprayed, and the film thickness is 10 to 15 μm. The luminous paint is a two-component polyurethane luminous paint, which contains 0.1 to 5 wt.% of rare earth blue-green luminous powder in the isocyanate prepolymer and 0.1 to 5 wt.% of aluminate alkaline earth metal fluorescent powder in the hydroxyl-containing resin. The aluminate alkaline earth metal fluorescent powder is SrAl2O4:Eu, Dy or SrAl2O4:Eu or Sr4Al 14 O 25 :Eu, Dy or CaAl2O4:Eu, Nd;

[0044] (4) Leveling, leveling temperature 20 ~ 60 ° C, leveling time 5 ~ 8 minutes;

[0045] (5) Spray transparent paint with a viscosity of 16 to 20 seconds, apply 4 cups, and a film thickness of 15 to 20 μm. Heat and cure, and the result is obtained. The curing temperature is 140 to 150°C and the time is 35 to 45 minutes.

[0046] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the specification of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A spraying process for wheels with luminous paint on the surface, characterized in that: The steps include: (1) After the wheels are pre-treated by degreasing, pickling and passivation, they are sprayed with base powder with a film thickness of 60 to 120 μm; (2) Spray primer, the viscosity of the primer is 14 to 18 seconds, apply 4 cups, the film thickness is 15 to 20 μm, and then level it. The leveling temperature is 20 to 60 ° C and the leveling time is 5 to 8 minutes; (3) Adjust the luminous paint to a construction viscosity of 14 to 18 seconds, apply 4 cups, and when spraying the paint, the spray gun is 150 to 250 mm away from the surface of the wheel to be sprayed. First spray a layer of luminous paint with a film thickness of 10 to 15 μm, and then spray the second layer after 5 to 10 seconds with a film thickness of 10 to 15 μm. The luminous paint is a two-component polyurethane luminous paint; (4) Leveling: leveling temperature 20-60°C, leveling time 5-8min; (5) Spray transparent paint with a viscosity of 16 to 20 seconds, apply 4 cups, and a film thickness of 15 to 20 μm. Heat and cure.

2. The spraying process of the wheel with luminous paint on the surface according to claim 1 is characterized in that: The primer in step (2) is a white matte primer.

3. The spraying process of the wheel with luminous paint on the surface according to claim 1 is characterized in that: The two-component polyurethane luminous paint in step (3) consists of two parts: an isocyanate prepolymer and a hydroxyl-containing resin, wherein the isocyanate prepolymer contains 0.1 to 5 wt.% of luminous powder, and the hydroxyl-containing resin contains 0.1 to 5 wt.% of fluorescent powder.

4. The spraying process of the wheel with luminous paint on the surface according to claim 3 is characterized in that: The luminous powder is rare earth blue-green luminous powder.

5. The spraying process of the wheel with luminous paint on the surface according to claim 3 is characterized in that: The phosphor is an alkaline earth metal aluminate phosphor.

6. The spraying process for wheels with luminous paint on the surface according to claim 5 is characterized in that: The aluminate alkaline earth metal phosphor is SrAl2O4:Eu, Dy or SrAl2O4:Eu or Sr4Al 14 O 25 :Eu, Dy or CaAl2O4:Eu, Nd.

7. The spraying process for wheels with luminous paint on the surface according to claim 1 is characterized in that: When using step (3), first disperse the luminous powder and the fluorescent powder in the corresponding components by high-speed stirring, then mix the two components evenly, and use them within 3 to 5 hours.

8. The spraying process for wheels with luminous paint on the surface according to claim 1 is characterized in that: The heating curing in step (5) has a curing temperature of 140 to 150° C. and a curing time of 35 to 45 minutes.