CN110976255A - Automobile body coating method - Google Patents
Automobile body coating method Download PDFInfo
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- CN110976255A CN110976255A CN201911360036.XA CN201911360036A CN110976255A CN 110976255 A CN110976255 A CN 110976255A CN 201911360036 A CN201911360036 A CN 201911360036A CN 110976255 A CN110976255 A CN 110976255A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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Abstract
The invention provides a coating method of an automobile body, which comprises the following steps: performing electrophoretic coating on the vehicle body to be coated to ensure that the electrophoretic roughness of the vehicle body is less than or equal to 0.26 Ra; after electrophoretic coating, performing middle coating spraying on the vehicle body, wherein the rotating speed of a middle coating rotary cup is 35000-55000 r/min; after the intermediate coating is coated, carrying out BC1 spraying on the vehicle body by using red metallic paint, wherein the dehydration rate of the colored paint is controlled to be 85-90%; after BC1 spraying, carrying out BC2 spraying on the vehicle body by using red pigment paint, wherein the dehydration rate of the paint is controlled to be 85-90%; after BC2 spraying, the vehicle body was subjected to varnish spraying so that the varnish film thickness satisfied the condition: the horizontal plane is more than or equal to 50 mu m, and the vertical plane is more than or equal to 45 mu m. According to the automobile body coating method provided by the invention, red metallic paint is adopted in BC1 spraying, red pigment paint is adopted in BC2 spraying, the colors sprayed by the red metallic paint and the BC2 spraying are matched, and the automobile body coating method has good visual deep feeling.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to an automobile body coating method.
Background
With the rapid development of the automobile industry, automobiles have become one of indispensable vehicles for people to go out. The automobile keeping quantity is increased year by year, more and more people own private automobiles, and the automobile color is one of important influencing factors when a consumer purchases the automobile.
Red is the traditional color of china, so that the automobile with red body is very popular with consumers. At present, to realize red automobile body, traditional automobile body coating mode uses the pearly paint spraying process, spouts CB + outward and spouts MB outward promptly, but the red that this kind of process spraying was out, its profound sense and chroma are relatively poor, have influenced consumer's purchase desire.
Disclosure of Invention
In view of the above, the present invention provides a method for coating an automobile body to improve the profound feeling and the chroma of red color spray.
The technical scheme of the invention is as follows:
an automobile body coating method comprises the following steps:
performing electrophoretic coating on the vehicle body to be coated to ensure that the electrophoretic roughness of the vehicle body is less than or equal to 0.26 Ra;
after electrophoretic coating, performing middle coating spraying on the vehicle body, wherein the rotating speed of a middle coating rotary cup is 35000-55000 r/min;
after the intermediate coating is coated, carrying out BC1 spraying on the vehicle body by using red metallic paint, wherein the dehydration rate of the colored paint is controlled to be 85-90%;
after BC1 spraying, carrying out BC2 spraying on the vehicle body by using red pigment paint, wherein the dehydration rate of the paint is controlled to be 85-90%;
after BC2 spraying, the vehicle body was subjected to varnish spraying so that the varnish film thickness satisfied the condition: the horizontal plane is more than or equal to 50 mu m, and the vertical plane is more than or equal to 45 mu m.
According to the automobile body coating method provided by the invention, red metallic paint is adopted in BC1 spraying, red pigment paint is adopted in BC2 spraying, the red metallic paint and the red pigment paint are matched with the sprayed colors and have good visual deep feeling, in addition, the electrophoretic roughness of the automobile body is less than or equal to 0.26Ra in the electrophoretic coating, the rotating speed of a middle coating rotating cup in the middle coating spraying is 35000-55000 r/min, and the dehydration rate of the middle paint in BC1 spraying and BC2 spraying is 85-90%, so that the horizontal plane and the vertical plane of the automobile body have high chroma, and the red chroma is effectively improved.
In addition, the automobile body coating method provided by the invention also has the following technical characteristics:
further, after the intermediate coating and spraying, the step of performing BC1 spraying on the vehicle body by using red metallic paint specifically comprises the following steps:
and after the intermediate coating, performing BC1 spraying on the vehicle body by using red metal paint to ensure that the film thickness of the red metal paint is 6-8 mu m.
Furthermore, in the step of performing BC1 spraying on the vehicle body by using red metallic paint after the intermediate coating spraying, when measuring the film thickness, the simple vehicle cover is manufactured by using the film, and the number of film thickness measuring points of the whole vehicle is not less than 299.
Further, after the BC1 spraying, the step of performing BC2 spraying on the vehicle body by using the red pigment paint specifically comprises the following steps:
and after BC1 spraying, carrying out BC2 spraying on the vehicle body by using the red pigment paint, wherein the film thickness of the red pigment paint is 7-9 mu m.
Furthermore, in the step of BC2 spraying of the vehicle body with red pigment paint after BC1 spraying, when measuring the film thickness, a simple vehicle cover is made of a film, and the number of film thickness measuring points of the whole vehicle is not less than 299.
Further, after the intermediate coating, the BC1 spraying step is performed on the vehicle body by using red metallic paint, wherein the spraying sequence is as follows:
the inner surfaces of the engine hood and the tail door are firstly sprayed for the first time, then the inner surfaces of the right two-door and the left two-door are sprayed for the first time, then the inner surfaces of the right two-door and the tail door are sprayed for the second time, and finally the inner surfaces of the engine hood and the left two-door are sprayed for the second time. The spraying mode can save the operation time and ensure the spraying quality.
Further, in the step of BC2 painting of the vehicle body with the red pigmented paint after BC1 painting, the painting sequence coincides with the painting sequence in BC1 painting.
Further, in the step of performing intermediate coating spraying on the vehicle body after electrophoretic coating, the rotating speed of the intermediate coating rotary cup is 45000 r/min.
Further, the step of performing electrophoretic painting on the vehicle body to be painted specifically comprises:
and putting the vehicle body to be coated and the corresponding electrode into the water-soluble paint, connecting a power supply, and then coating for 2-4 hours to form a water-insoluble paint film of 8-16 mu m on the surface of the vehicle body by using resin and pigment filler in the paint.
Further, after the intermediate coating, in the step of performing BC1 spraying on the vehicle body with the red metallic paint, the silver-element aluminum powder is contained in the red metallic paint.
Detailed Description
The present invention will now be described more fully hereinafter with reference to various embodiments for the purpose of facilitating an understanding of the invention, but the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, 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 belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The embodiment of the invention provides an automobile body coating method, which comprises the following steps:
performing electrophoretic coating on the vehicle body to be coated to ensure that the electrophoretic roughness of the vehicle body is less than or equal to 0.26 Ra;
after electrophoretic coating, performing middle coating spraying on the vehicle body, wherein the rotating speed of a middle coating rotary cup is 35000-55000 r/min;
after the intermediate coating is coated, carrying out BC1 spraying on the vehicle body by using red metallic paint, wherein the dehydration rate of the colored paint is controlled to be 85-90%;
after BC1 spraying, carrying out BC2 spraying on the vehicle body by using red pigment paint, wherein the dehydration rate of the paint is controlled to be 85-90%;
after BC2 spraying, the vehicle body was subjected to varnish spraying so that the varnish film thickness satisfied the condition: the horizontal plane is more than or equal to 50 mu m, and the vertical plane is more than or equal to 45 mu m.
The BC1 spraying method for the vehicle body by using the red metallic paint specifically comprises the following steps:
and after the intermediate coating, performing BC1 spraying on the vehicle body by using red metal paint to ensure that the film thickness of the red metal paint is 6-8 mu m.
Specifically, when the film thickness is measured, the film is used for manufacturing the simple car cover, and the number of the film thickness measuring points of the whole car is not less than 299.
After BC1 spraying, the BC2 spraying of the vehicle body with the red pigment paint specifically comprises the following steps:
and after BC1 spraying, carrying out BC2 spraying on the vehicle body by using the red pigment paint, wherein the film thickness of the red pigment paint is 7-9 mu m.
Specifically, when the film thickness is measured, the film is used for manufacturing the simple car cover, and the number of the film thickness measuring points of the whole car is not less than 299.
After the intermediate coating is carried out, performing BC1 spraying on the vehicle body by using red metallic paint, wherein the spraying sequence is as follows:
the inner surfaces of the engine hood and the tail door are firstly sprayed for the first time, then the inner surfaces of the right two-door and the left two-door are sprayed for the first time, then the inner surfaces of the right two-door and the tail door are sprayed for the second time, and finally the inner surfaces of the engine hood and the left two-door are sprayed for the second time.
In the BC2 spraying step of the vehicle body with the red pigmented paint after the BC1 spraying, the spraying order is the same as the spraying order in the BC1 spraying.
The electrophoretic painting method for the vehicle body to be painted specifically comprises the following steps:
and putting the vehicle body to be coated and the corresponding electrode into the water-soluble paint, connecting a power supply, and then coating for 2-4 hours to form a water-insoluble paint film of 8-16 mu m on the surface of the vehicle body by using resin and pigment filler in the paint.
Wherein, the red metallic paint contains silver aluminum powder.
The following examples are intended to illustrate the invention in more detail. The embodiments of the present invention are not limited to the following specific examples. The present invention can be modified and implemented as appropriate within the scope of the main claim.
Example 1:
an automobile body coating method comprises the following steps:
performing electrophoretic coating on a vehicle body to be coated, specifically putting the vehicle body to be coated and a corresponding electrode into a water-soluble coating, connecting a power supply, and then coating for 3 hours to form a 10-micron water-insoluble paint film on the surface of the vehicle body by using resin and pigment fillers in the coating, so that the electrophoretic roughness of the vehicle body is less than or equal to 0.26 Ra;
after electrophoretic coating, performing middle coating spraying on the vehicle body, wherein the rotating speed of a middle coating rotary cup is 40000 r/min;
after the intermediate coating and painting, performing BC1 painting on the vehicle body by using red metal paint to ensure that the film thickness of the red metal paint is 6 mu m, wherein the red metal paint is provided with silver element type aluminum powder for uniformly reflecting light and simultaneously has strong metal feeling and high covering property, and the painting sequence is as follows: firstly, spraying the inner surfaces of the engine hood and the tail door for the first time, then spraying the inner surfaces of the right two doors and the left two doors for the first time, then spraying the inner surfaces of the right two doors and the tail door for the second time, and finally spraying the inner surfaces of the engine hood and the left two doors for the second time, wherein the spraying mode can save the operation time and simultaneously ensure the spraying quality; in BC1 spraying, the dehydration rate of the colored paint is controlled at 88%, when measuring the film thickness, the simple car cover is made by using the film, and the number of the film thickness measuring points of the whole car is not less than 299.
After the BC1 spraying, the vehicle body was BC2 sprayed with the red pigmented paint so that the film thickness of the red pigmented paint was 9 μm in the following order: firstly, spraying the inner surfaces of the engine hood and the tail door for the first time, then spraying the inner surfaces of the two doors on the right side and the two doors on the left side for the first time, then spraying the inner surfaces of the two doors on the right side and the tail door for the second time, and finally spraying the inner surfaces of the engine hood and the two doors on the left side for the second time; in BC2 spraying, the dehydration rate of the colored paint is controlled at 90%, when the film thickness is measured, the film is used for manufacturing the simple car cover, and the number of the film thickness measuring points of the whole car is not less than 299.
After BC2 spraying, the vehicle body was subjected to varnish spraying so that the varnish film thickness satisfied the condition: the horizontal plane is more than or equal to 50 mu m, and the vertical plane is more than or equal to 45 mu m.
By testing, the finally sprayed red color by adopting the automobile body coating method of the embodiment has a profound feeling index of 4.7 and a chroma of 98 at 15 degrees of red color.
Example 2:
an automobile body coating method comprises the following steps:
performing electrophoretic coating on the vehicle body to be coated, specifically putting the vehicle body to be coated and a corresponding electrode into a water-soluble coating, connecting a power supply, and then coating for 2 hours to form a 14um water-insoluble paint film on the surface of the vehicle body by using resin and pigment fillers in the coating, so that the electrophoretic roughness of the vehicle body is less than or equal to 0.26 Ra;
after electrophoretic coating, performing middle coating spraying on the vehicle body, wherein the rotating speed of a middle coating rotary cup is 45000 r/min;
after the intermediate coating and painting, performing BC1 painting on the vehicle body by using red metal paint to ensure that the film thickness of the red metal paint is 6 mu m, wherein the red metal paint is provided with silver element type aluminum powder for uniformly reflecting light and simultaneously has strong metal feeling and high covering property, and the painting sequence is as follows: firstly, spraying the inner surfaces of the engine hood and the tail door for the first time, then spraying the inner surfaces of the two doors on the right side and the two doors on the left side for the first time, then spraying the inner surfaces of the two doors on the right side and the tail door for the second time, and finally spraying the inner surfaces of the engine hood and the two doors on the left side for the second time; in BC1 spraying, the dehydration rate of the colored paint is controlled at 90%, when the film thickness is measured, the film is used for manufacturing the simple car cover, and the number of the film thickness measuring points of the whole car is not less than 299.
After the BC1 spraying, the vehicle body was BC2 sprayed with the red pigmented paint so that the film thickness of the red pigmented paint was 9 μm in the following order: firstly, spraying the inner surfaces of the engine hood and the tail door for the first time, then spraying the inner surfaces of the two doors on the right side and the two doors on the left side for the first time, then spraying the inner surfaces of the two doors on the right side and the tail door for the second time, and finally spraying the inner surfaces of the engine hood and the two doors on the left side for the second time; in BC2 spraying, the dehydration rate of the colored paint is controlled at 86%, when the film thickness is measured, the simple car cover is made by using the film, and the number of the film thickness measuring points of the whole car is not less than 299.
After BC2 spraying, the vehicle body was subjected to varnish spraying so that the varnish film thickness satisfied the condition: the horizontal plane is more than or equal to 50 mu m, and the vertical plane is more than or equal to 45 mu m.
By testing, the finally sprayed red color by adopting the automobile body coating method of the embodiment has a profound feeling index of 4.9 and a chroma of 97 at 15 degrees of red color.
Example 3:
an automobile body coating method comprises the following steps:
performing electrophoretic coating on a vehicle body to be coated, specifically putting the vehicle body to be coated and a corresponding electrode into a water-soluble coating, connecting a power supply, and then coating for 2 hours to form a 16-micron water-insoluble paint film on the surface of the vehicle body by using resin and pigment fillers in the coating, so that the electrophoretic roughness of the vehicle body is less than or equal to 0.26 Ra;
after electrophoretic coating, performing middle coating spraying on the car body, wherein the rotating speed of a middle coating rotary cup is 38000 r/min;
after the intermediate coating and painting, performing BC1 painting on the vehicle body by using red metal paint to ensure that the film thickness of the red metal paint is 7 mu m, wherein the red metal paint is provided with silver element type aluminum powder for uniformly reflecting light and simultaneously has strong metal feeling and high covering property, and the painting sequence is as follows: firstly, spraying the inner surfaces of the engine hood and the tail door for the first time, then spraying the inner surfaces of the two doors on the right side and the two doors on the left side for the first time, then spraying the inner surfaces of the two doors on the right side and the tail door for the second time, and finally spraying the inner surfaces of the engine hood and the two doors on the left side for the second time; in BC1 spraying, the dehydration rate of the colored paint is controlled at 85%, when the film thickness is measured, the film is used for manufacturing the simple car cover, and the number of the film thickness measuring points of the whole car is not less than 299.
After the BC1 spraying, the vehicle body was BC2 sprayed with the red pigmented paint so that the film thickness of the red pigmented paint was 8 μm, in the following order: firstly, spraying the inner surfaces of the engine hood and the tail door for the first time, then spraying the inner surfaces of the two doors on the right side and the two doors on the left side for the first time, then spraying the inner surfaces of the two doors on the right side and the tail door for the second time, and finally spraying the inner surfaces of the engine hood and the two doors on the left side for the second time; in BC2 spraying, the dehydration rate of the colored paint is controlled at 86%, when the film thickness is measured, the simple car cover is made by using the film, and the number of the film thickness measuring points of the whole car is not less than 299.
After BC2 spraying, the vehicle body was subjected to varnish spraying so that the varnish film thickness satisfied the condition: the horizontal plane is more than or equal to 50 mu m, and the vertical plane is more than or equal to 45 mu m.
By testing, the finally sprayed red color by adopting the automobile body coating method of the embodiment has a profound feeling index of 4.6 and a chroma of 95 at 15 degrees of red color.
Example 4:
an automobile body coating method comprises the following steps:
performing electrophoretic coating on the vehicle body to be coated, specifically putting the vehicle body to be coated and a corresponding electrode into a water-soluble coating, connecting a power supply, and then coating for 4 hours to form a 9-micron water-insoluble paint film on the surface of the vehicle body by using resin and pigment fillers in the coating, so that the electrophoretic roughness of the vehicle body is less than or equal to 0.26 Ra;
after electrophoretic coating, performing middle coating spraying on the vehicle body, wherein the rotating speed of a middle coating rotary cup is 35000 r/min;
after the intermediate coating and painting, performing BC1 painting on the vehicle body by using red metal paint to ensure that the film thickness of the red metal paint is 7 mu m, wherein the red metal paint is provided with silver element type aluminum powder for uniformly reflecting light and simultaneously has strong metal feeling and high covering property, and the painting sequence is as follows: firstly, spraying the inner surfaces of the engine hood and the tail door for the first time, then spraying the inner surfaces of the two doors on the right side and the two doors on the left side for the first time, then spraying the inner surfaces of the two doors on the right side and the tail door for the second time, and finally spraying the inner surfaces of the engine hood and the two doors on the left side for the second time; in BC1 spraying, the dehydration rate of the colored paint is controlled at 86%, when the film thickness is measured, the simple car cover is made by using the film, and the number of the film thickness measuring points of the whole car is not less than 299.
After the BC1 spraying, the vehicle body was BC2 sprayed with the red pigmented paint so that the film thickness of the red pigmented paint was 8 μm, in the following order: firstly, spraying the inner surfaces of the engine hood and the tail door for the first time, then spraying the inner surfaces of the two doors on the right side and the two doors on the left side for the first time, then spraying the inner surfaces of the two doors on the right side and the tail door for the second time, and finally spraying the inner surfaces of the engine hood and the two doors on the left side for the second time; in BC2 spraying, the dehydration rate of the colored paint is controlled at 85%, when the film thickness is measured, the film is used for manufacturing the simple car cover, and the number of the film thickness measuring points of the whole car is not less than 299.
After BC2 spraying, the vehicle body was subjected to varnish spraying so that the varnish film thickness satisfied the condition: the horizontal plane is more than or equal to 50 mu m, and the vertical plane is more than or equal to 45 mu m.
By testing, the finally sprayed red color by adopting the automobile body coating method of the embodiment has a profound feeling index of 4.7 and a chroma of 96 at 15 degrees of red color.
Example 5:
an automobile body coating method comprises the following steps:
performing electrophoretic coating on the vehicle body to be coated, specifically putting the vehicle body to be coated and a corresponding electrode into a water-soluble coating, connecting a power supply, and then coating for 3 hours to form a water-insoluble paint film of 8um on the surface of the vehicle body by resin and pigment in the coating, so that the electrophoretic roughness of the vehicle body is less than or equal to 0.26 Ra;
after electrophoretic coating, performing middle coating spraying on the vehicle body, wherein the rotating speed of a middle coating rotary cup is 55000 r/min;
after the intermediate coating and painting, performing BC1 painting on the vehicle body by using red metal paint to ensure that the film thickness of the red metal paint is 8 mu m, wherein the red metal paint is provided with silver element type aluminum powder for uniformly reflecting light and simultaneously has strong metal feeling and high covering property, and the painting sequence is as follows: firstly, spraying the inner surfaces of the engine hood and the tail door for the first time, then spraying the inner surfaces of the two doors on the right side and the two doors on the left side for the first time, then spraying the inner surfaces of the two doors on the right side and the tail door for the second time, and finally spraying the inner surfaces of the engine hood and the two doors on the left side for the second time; in BC1 spraying, the dehydration rate of the colored paint is controlled at 86%, when the film thickness is measured, the simple car cover is made by using the film, and the number of the film thickness measuring points of the whole car is not less than 299.
After the BC1 spraying, the vehicle body was BC2 sprayed with the red pigmented paint so that the film thickness of the red pigmented paint was 7 μm in the following order: firstly, spraying the inner surfaces of the engine hood and the tail door for the first time, then spraying the inner surfaces of the two doors on the right side and the two doors on the left side for the first time, then spraying the inner surfaces of the two doors on the right side and the tail door for the second time, and finally spraying the inner surfaces of the engine hood and the two doors on the left side for the second time; in BC2 spraying, the dehydration rate of the colored paint is controlled at 88%, when measuring the film thickness, the simple car cover is made by using the film, and the number of the film thickness measuring points of the whole car is not less than 299.
After BC2 spraying, the vehicle body was subjected to varnish spraying so that the varnish film thickness satisfied the condition: the horizontal plane is more than or equal to 50 mu m, and the vertical plane is more than or equal to 45 mu m.
By testing, the finally sprayed red color by adopting the automobile body coating method of the embodiment has a profound feeling index of 4.8 and a chroma of 98 at 15 degrees of red color.
Table 1 compares the test results of the above examples, wherein the comparative example is a conventional pearlescent paint spray coating process:
TABLE 1 comparison of results table
| Profound feeling index | Chroma of 15 degree red | |
| Example 1 | 4.7 | 98 |
| Example 2 | 4.9 | 97 |
| Example 3 | 4.6 | 95 |
| Example 4 | 4.7 | 96 |
| Example 5 | 4.8 | 98 |
| Comparative example | 3.0 | 70 |
In conclusion, according to the automobile body coating method provided by the invention, the red metal paint is adopted in the BC1 spraying process, the red pigment paint is adopted in the BC2 spraying process, the colors sprayed by the red metal paint and the BC2 spraying process are matched, the red metal paint and the BC2 spraying process have good visual deep feeling, in addition, the electrophoresis roughness of the automobile body is less than or equal to 0.26Ra by limiting the electrophoretic coating process, the rotating speed of a middle coating rotating cup during the middle coating spraying process is 35000-55000 r/min, and the dehydration rate of the BC1 spraying process and the BC2 spraying process is 85-90%, so that the horizontal plane and the vertical plane of the automobile body have high chroma, and the red chroma is effectively improved.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for coating an automobile body is characterized by comprising the following steps:
performing electrophoretic coating on the vehicle body to be coated to ensure that the electrophoretic roughness of the vehicle body is less than or equal to 0.26 Ra;
after electrophoretic coating, performing middle coating spraying on the vehicle body, wherein the rotating speed of a middle coating rotary cup is 35000-55000 r/min;
after the intermediate coating is coated, carrying out BC1 spraying on the vehicle body by using red metallic paint, wherein the dehydration rate of the colored paint is controlled to be 85-90%;
after BC1 spraying, carrying out BC2 spraying on the vehicle body by using red pigment paint, wherein the dehydration rate of the paint is controlled to be 85-90%;
after BC2 spraying, the vehicle body was subjected to varnish spraying so that the varnish film thickness satisfied the condition: the horizontal plane is more than or equal to 50 mu m, and the vertical plane is more than or equal to 45 mu m.
2. The automotive body coating method according to claim 1, wherein the step of BC1 spraying the automotive body with red metallic paint after the intermediate coating spray coating specifically comprises:
and after the intermediate coating, performing BC1 spraying on the vehicle body by using red metal paint to ensure that the film thickness of the red metal paint is 6-8 mu m.
3. The automobile body coating method according to claim 2, wherein in the step of BC1 painting the automobile body with red metallic paint after the intermediate coating painting, the simple car cover is made of a thin film at the time of measuring the film thickness, and the number of the whole car film thickness measuring points is not less than 299.
4. The method for coating an automobile body according to claim 1, wherein the step of performing BC2 spraying on the automobile body with red pigmented paint after BC1 spraying specifically comprises:
and after BC1 spraying, carrying out BC2 spraying on the vehicle body by using the red pigment paint, wherein the film thickness of the red pigment paint is 7-9 mu m.
5. The method for coating an automobile body according to claim 4, wherein in the step of BC2 spraying the automobile body with a red pigmented paint after BC1 spraying, when measuring the film thickness, a simple car cover is made of a thin film, and the number of the whole car film thickness measurement points is not less than 299.
6. The automobile body coating method according to claim 1, wherein in the step of BC1 spraying the automobile body with red metallic paint after the intermediate coating spray coating, the spraying sequence is:
the inner surfaces of the engine hood and the tail door are firstly sprayed for the first time, then the inner surfaces of the right two-door and the left two-door are sprayed for the first time, then the inner surfaces of the right two-door and the tail door are sprayed for the second time, and finally the inner surfaces of the engine hood and the left two-door are sprayed for the second time.
7. The method for coating an automobile body according to claim 6, wherein in the step of BC2 spraying the automobile body with the red pigmented paint after BC1 spraying, the spraying sequence is identical to that in BC1 spraying.
8. The method for coating an automobile body according to claim 1, wherein in the step of applying the intercoat coating to the automobile body after the electrodeposition coating, the rotation speed of the intercoat cup is 45000 r/min.
9. The automotive body coating method according to claim 1, wherein the step of electrophoretic coating the body to be coated specifically comprises:
and putting the vehicle body to be coated and the corresponding electrode into the water-soluble paint, connecting a power supply, and then coating for 2-4 hours to form a water-insoluble paint film of 8-16 mu m on the surface of the vehicle body by using resin and pigment filler in the paint.
10. The method for coating an automobile body according to claim 1, wherein the red metallic paint contains silver-type aluminum powder in the step of BC1 spraying the automobile body with the red metallic paint after the intermediate spray coating.
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| CN112517353A (en) * | 2020-11-06 | 2021-03-19 | 中国第一汽车股份有限公司 | Method for solving color difference existing in painted automobile body repair |
| CN112620048A (en) * | 2020-10-21 | 2021-04-09 | 中国第一汽车股份有限公司 | 3D color coating method for automobile body |
| CN113481566A (en) * | 2021-06-25 | 2021-10-08 | 东风汽车集团股份有限公司 | Automobile body coating structure containing water-based paint and powder paint and preparation method thereof |
| CN116618269A (en) * | 2023-05-26 | 2023-08-22 | 中国第一汽车股份有限公司 | Automobile liquid metal color coating process |
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