JP2021006411A - Vehicle and vehicle coating method - Google Patents

Abstract

To provide a vehicle and a vehicle coating method by which a coating quality of an inner plate part of the vehicle is improved with a simple method.SOLUTION: A coating method includes a first base coat step 3 and a second base coat step 4 of applying a colored coating material to an outer plate part of a vehicle to form a base coat, a clear inner plate correction step 5 of applying a clear coating material to an inner plate part, which is a portion visibly confirmed from a vehicle outer part when an opening/closing part of the vehicle is opened after the second base coat step 4 to form a clear coat for the inner plate, and a clear coating step 6 of applying a clear coating material to the outer plate part after the clear inner plate correction step 5. A vehicle is coated by the coating method. The clear coating material applied in the clear coating step 6 is colorless and transparent. The clear coating material applied in the clear inner plate correction step 5 has a color similar to that of a coating film of the outer plate part.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vehicle and a method of painting a vehicle, and more particularly to a coating film obtained by superimposing a clear coat on a color coat and a method of coating the same.

As a basic painting process for the outer panel of a vehicle, there are processes such as pretreatment, undercoating, intermediate coating, and topcoating for the outer panel to be painted. In particular, in the top coating process, it is common to form a base coat to which a color paint is applied and a clear coat to which a clear paint is applied in order, and then perform baking.
Further, in recent years, a method of repeatedly applying a first base coat containing a bright material and a coloring pigment and a second base coat containing only a coloring pigment without a bright material and having a high light transmittance is applied to a base coat which is a color paint. It is done. As a result, it is possible to obtain a deep coating film by seeing the brilliance of the first base coat, which is the lower layer, through the second base coat.

For example, in Patent Document 1, the first color clear paint and the second color clear paint, which are color paints, are sequentially applied on a base material to which the base paint is applied, and the brightness difference is high depending on the viewing angle. There is also a method of obtaining a coating film with a certain color.

Japanese Unexamined Patent Publication No. 2012-232236

By the way, when actually painting a vehicle, not only the outer plate but also the so-called inner plate such as the inside of the engine room and the opening edge of the door have the same or similar hue as the paint color of the outer plate. It is common that the inner panel paint is painted with a paint having. In the case of a coating method in which the first base coat and the second base coat described above can be obtained by coating a base coat having a different color and then applying a clear paint on the base coat, the hue of the comprehensive film obtained by this method is used. Since the inner plate paint is produced in the same color or a similar color, the colors of the first and second base coats are different from those of the individual paints.

By the way, since the inner plate portion has a complicated shape, for example, an operator uses a spray gun to paint a color paint and a clear paint instead of a painting robot. In the manual coating of the inner plate paint and the clear paint on the inner plate, it is common to perform so-called pre-correction before painting the outer plate, respectively, in order to improve the appearance of the finished product.
However, when the outer plate is painted after the inner plate in this way, the paint for the outer plate may wrap around on the coating film of the inner plate and adhere thinly. Further, when painting the inner plate, particles of the paint may remain on the surface of the coating film and unevenness may occur.

If the paint color of the outer plate that wraps around and adheres thinly is the same color as the inner plate paint color or a similar color, even if the inner plate paint film has irregularities, the paint for the outer plate will be on top of it. Even if it gets in and adheres, there is no problem in terms of coating quality because it is painted so as to hide the unevenness.
However, for example, when the base coat is divided into a plurality of times with paints of different colors such as the first base coat and the second base coat as described above, the color of the first base coat is different from that of the paint for the inner plate coating. Because it is different, the uneven portion where the first base coat wraps around and adheres to a part of the already painted opening edge part causes color unevenness (note that the second base coat also enters the opening edge portion, but the light transmittance The effect of causing color spots is lower than that of the first base coat.) Therefore, there is a possibility that the coating quality will be low.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a vehicle and a vehicle coating method in which the coating quality of the inner panel coating is improved by a simple method. is there.

In order to achieve the above object, the vehicle of the present invention has an inner plate coating film formed on an inner plate portion which is a portion that can be visually recognized from the outside of the vehicle when the opening / closing portion of the vehicle is opened, and an outer plate of the vehicle. A vehicle having an outer panel coating film to be formed, wherein the outer panel coating film is a base coat which is a colored film having a colored paint and a clear coat for an outer panel which is a transparent film formed on the base coat. The inner plate coating film is an inner plate colored film which is a colored film and an inner plate which is a colored film having a clear paint of the same color or a similar color as the outer plate coating film on the inner plate colored film. It is characterized by having a clear coat for use.

In the vehicle configured in this way, a transparent film is formed by the clear paint on the base coat which is a colored film on the outer panel portion to form the outer panel coating film. On the other hand, in the inner plate portion, a clear coat for the inner plate, which is a colored film, is formed on the colored film for the inner plate. Even if the base coat enters the lower layer of the clear coat for the inner plate, it is on the base coat that has entered. In addition, a relatively thick colored film can be secured by a clear coat for the inner plate having the same color or a similar color as the outer plate coating film obtained by the outer plate coating. Thereby, the color unevenness in the inner plate coating film can be suppressed by a simple method.

As another aspect, the outer panel coating film may have a first base coat and a second base coat having a colored paint having a color different from that of the first base coat on the first base coat.
As a result, even if the second base coat is thinly penetrated into the lower layer of the inner plate clear coat, the inner plate clear coat of the same color or the same color as the outer plate coating film is colored on the invaded second base coat. A relatively thick film can be secured. Thereby, the color unevenness of the inner plate coating film can be suppressed.

As another aspect, the outer plate portion may be the door of the vehicle, and the inner plate portion may be the door opening edge portion of the vehicle facing the door when the door is closed.
As a result, on the vehicle door, a transparent film is formed by the clear paint on the base coat, which is a colored film, and an outer panel coating film is formed. On the other hand, at the edge of the door opening of the vehicle, a clear coat for the inner plate, which is a colored film, is formed, but even if the base coat gets into the lower layer of the clear coat for the inner plate, it can be obtained by painting the outer plate on it. A relatively thick colored film can be secured by a clear coat for the inner plate having the same color or a similar color as the outer plate coating film. Thereby, the color unevenness of the inner plate coating film at the edge of the door opening of the vehicle can be suppressed by a simple method.

Further, the vehicle painting method of the present invention can be visually recognized from the outside of the vehicle when the outer panel coating step of painting the outer panel portion of the vehicle with a colored paint and the opening / closing portion of the vehicle are opened after the outer panel painting step. An inner plate clear coating step of applying a clear paint to the inner plate portion, which is a portion, to form a clear coat for the inner plate, and an inner plate clear coating step of applying the clear paint to the outer plate portion. A method of painting a vehicle having an outer plate clear coating step, the clear paint applied in the outer plate clear coating step is transparent, and the clear paint applied in the inner plate clear coating step is the outer plate coating. It is characterized in that it is a colored paint having the same color as or a similar color to the colored paint applied in the process.

As a result, even if the colored paint to be painted in the outer plate painting process gets into the lower layer of the clear coat for the inner plate, it is the same color as or similar to the outer plate coating film obtained by the outer plate painting on the colored paint that has entered. A relatively thick colored film can be secured by the clear coat for the colored inner plate. Thereby, the color unevenness of the coating film on the inner plate can be suppressed by a simple method.
As another aspect, it is preferable to have an inner plate coating step of applying the inner plate portion with a colored paint before the outer plate coating step.

As a result, unevenness is formed on the surface of the colored paint applied to the inner plate portion by the inner plate coating process, and even if the colored paint to be painted in the outer plate coating process enters the upper layer, the same color as the base coat or A relatively thick colored film can be secured by the clear coat for the inner plate of the same color. Thereby, the color unevenness of the coating film on the inner plate can be suppressed by a simple method.

According to the vehicle and the vehicle coating method of the present invention, the coating quality of the inner plate portion can be improved by a simple method.

It is explanatory drawing explaining the painted part of a vehicle. It is a figure which shows the painted part of the door opening edge part in the body body part of a vehicle. It is a figure which shows the painted part of the inner edge part of a door. It is explanatory drawing which shows the process of the coating method of this embodiment. It is a vertical cross-sectional view of the coating film of the outer panel part obtained by the coating method of this embodiment. This is an example of a vertical cross-sectional view of the coating film of the inner plate portion obtained by the coating method of the present embodiment. This is an example of a vertical cross-sectional view of a coating film of an inner plate portion obtained by the coating method of the comparative example.

Hereinafter, an embodiment of a coating method embodying the present invention will be described.
In the present embodiment, the present invention is applied to a painting method for metallically painting the body of a vehicle such as an automobile.
FIG. 1 is an explanatory diagram illustrating a painted portion of the vehicle. FIG. 2 is a diagram showing a painted portion of the door opening edge portion of the vehicle body 31. FIG. 3 is a diagram showing a painted portion of the inner edge portion of the door 32. In addition, in FIGS. 2 to 3, the gray-colored portion is the inner plate portion 33.

As shown in FIGS. 1 to 3, for example, in the painting process of painting the body 31 of the vehicle in a factory, the outer plate portion 34 and the inner plate portion 33 of the vehicle are painted.
As shown in FIG. 1, the outer plate portion 34 is a member constituting the outer surface of the vehicle such as the main body portion 35, the door 32, the engine hood 36, the rear gate 37, etc. of the body 31 of the vehicle, and the outer surface of these members. To paint.

The inner plate portion 33 cannot be visually recognized from the outside of the vehicle when the opening / closing portion, which is a member that opens / closes with respect to the main body portion 35 such as the door 32, the engine hood 36, and the rear gate 37, is closed. It is a part that can be seen from the outside of the vehicle when opened. Therefore, the inner plate portion 33 is the edge portion of the opening 38 of the main body portion 35 opened by the door 32 as shown in FIG. 2, the inner edge portion of the door 32 as shown in FIG. 3, and the main body opened by the rear gate 37. The edge of the opening 39 of the portion 35, the inner edge of the rear gate 37, the back surface of the engine hood 36, and the like.

FIG. 4 is an explanatory diagram showing a process of the coating method of the present embodiment. FIG. 4 shows the steps after the intermediate coating step 1.
In the vehicle coating process of the present embodiment, first, a pretreatment for degreasing and chemical conversion of the outer panel, an undercoating step for forming an electrodeposition coating film for rust prevention is performed, and then an intermediate coating film 11 is formed. Painting step 1 is carried out.

As shown in FIG. 1, after the intermediate coating coating process 1, the base inner plate correction step 2 (inner plate coating process), the first base coating process 3 (outer plate coating process), and the second base coating process 4 (outer) are sequentially performed. The plate coating process), the clear inner plate correction process 5 (inner plate clear coating process), the clear coating process 6 (outer plate clear coating process), and the baking process 7 are performed in this order. Of these steps, the intermediate coating step 1, the first base coating step 3, the second base coating step 4, and the clear coating step 6 are steps of painting the outer plate portion 34, and automatic painting by a painting robot is common. .. Further, the base inner plate correction step 2 and the clear inner plate correction step 5 are steps of painting the inner plate portion 33.

In the intermediate coating coating step 1, a water-based coating material containing a coloring pigment and having no light transmittance, that is, having a light transmittance of 0% is applied. The coloring pigments also include bright materials such as aluminum and mica.
Baking or preheating (PH) is performed between the intermediate coating coating step 1 and the base inner plate correction step 2. Preheating is performed to evaporate the water contained in the paint applied in the intermediate coating coating step 1, and the coating is heated to a temperature lower than the curing temperature of the coating material.

In the base inner plate correction step 2, the metallic base color paint is manually applied to the inner plate portion 33, which is difficult to be uniformly painted by the painting robot, using a spray gun or the like. In this step, the same or the same color as the paint used in the first base coating step 3 may be used.
Wet-on-wet is used between the base inner plate correction step 2 and the first base coating step 3. That is, after the base inner plate correction step 2, painting is performed by the first base coating step 3 without drying and baking.

In the first base coating step 3, a water-based metallic base color paint (colored paint) containing a coloring pigment and a brightening material 10 is applied. The paint used in this process is translucent.
The space between the first base coating step 3 and the second base coating step 4 is wet-on-wet. That is, after the first base coating step 3, painting is performed by the second base coating step 4 without drying and baking.

In the second base coating step 4, a water-based base color paint (colored paint) containing a coloring pigment and not containing the glittering material 10 is applied. The paint used in the second base coat step 4 has a similar color to the paint used in the first base coat step 3, and is darker in color (low lightness and high saturation), and further in the first base coat step 3. A paint having higher translucency than the paint used is preferable. The similar colors referred to here are colors located in the vicinity in the color wheel. For example, red is a region from pink to orange, blue is a region from purple to light blue, and green. If there is, the area from light blue to yellow is regarded as a similar color.

A flash-off (FO) or preheat is performed between the second base coating step 4 and the clear inner plate correction step 5. The flash-off is performed to evaporate the water content from the coating film after the second base coating step 4, and is heated for, for example, about several minutes.
In the clear inner plate correction step 5, similarly to the base inner plate correction step 2, the clear paint is manually applied to the inner plate portion 33 using, for example, a spray gun or the like. In particular, the clear paint used in this step is a clear paint having a color similar to that of the coating film obtained by painting the outer panel. For example, the color difference between the color of the coating film 40 obtained by coating the outer panel and the clear coating material used in this step is ΔE = 0.5 to 7.0, preferably 0.5 to 3.0. .. Further, the coloring component of the clear paint used in this step may be 0.5 to 20.0% by weight based on the resin solid content.

The space between the clear inner plate correction step 5 and the clear coating step 6 is wet-on-wet. That is, after the clear inner plate correction step 5, painting is performed by the clear painting step 6 without drying and baking.
In the clear coating step 6, a transparent clear paint for protection and polishing is applied.
In the baking step 7, heating is performed at a temperature and time sufficient to fix all the coating films of the outer plate portion 34 and the inner plate portion 33 formed by painting in the steps up to this point.

The intermediate coating paint, which is the coating material used in the intermediate coating coating step 1 of the present embodiment, may be a mixture of a color similar to the color of the coating film obtained by coating the outer panel. Further, as these intermediate coatings, the first and second base coats, solvent-based or water-based paints generally called can be used.
FIG. 5 is a vertical cross-sectional view of the coating film 40 of the outer plate portion 34 obtained by the coating method of the present embodiment. FIG. 6 is an example of a vertical cross-sectional view of the coating film 50 of the inner plate portion 33 obtained by the coating method of the present embodiment. FIG. 7 is an example of a vertical cross-sectional view of the coating film 60 of the inner plate portion 33 obtained by the coating method of the comparative example. The comparative example shown in FIG. 7 is different from the above embodiment in that the paint used in the clear inner plate correction step 5 is the same transparent clear paint as in the clear coating step 6.

In the outer panel portion 34 of the vehicle that has undergone the above coating process, as shown in FIG. 5, the first base coating process 3 is formed on the intermediate coating film 11 formed in the intermediate coating process 1. The coating film 40 is formed in the order of the base coat 13 of No. 1, the second base coat 14 formed in the second base coating step 4, and the clear coat 16 (clear coat for the outer panel) formed in the clear coating step 6. The coating film 40 is an outer panel coating comprehensive film, and corresponds to the outer panel coating film of the present invention.

Then, in the outer plate portion 34 of the present embodiment in which the coating film 40 is formed as described above, the bright material 10 is contained in the first base coat 13 formed under the second base coat 14 which is a colored film. Therefore, a deep brilliant feeling, that is, a mode in which light is reflected by the shining material 10 at a position at the back of the coating film 40 can be obtained.
On the other hand, in the inner plate portion 33 of the vehicle, the inner plate coloring film 12 formed in the base inner plate correction step 2 is formed on the intermediate coating film 11 formed in the intermediate coating coating step 1, and the clear inner plate is further corrected on the inner plate coloring film 12 formed in the base inner plate correction step 2. The coating film 50 is formed in the order of the clear coat 46 (clear coat for inner plate) formed in step 5. The coating film 50 is an inner plate coating comprehensive film, and corresponds to the inner plate coating film of the present invention. However, as shown in FIG. 6, between the inner plate coloring film 12 and the clear coat 46, the paint applied in the first base coating step 3 having a color different from that of the inner plate paint is formed. There is a possibility that the second base coat 14 formed by the paint applied in the base coat 13 and the second base coat step 4 of the above is relatively thinly formed.

As shown in FIG. 7, in the comparative example, as described above, the paint applied to the surface of the coating film after the base inner plate correction step 2, that is, the surface of the inner plate coloring film 12 in the first base coating step 3 is in the form of particles. When a relatively thin second base coat 14 is formed on the surface, the inner plate colored film 12 and the second base coat 14 have different colors, so that the inner plate portion 33 is formed. The color of the coating film 60 may become mottled. Further, the color of the coating film 60 may become mottled depending on the thickness of the second base coat 14 formed on the inner plate portion 33. In order to prevent the color of the coating film 60 from becoming mottled, it is necessary to apply the inner plate after coating in the first base coating step 3 and the second base coating step 4, but with this method, the inner plate correction coating material is used. However, it becomes particles on the outer panel and scatters, which significantly impairs the finished appearance and causes a problem in coating quality.

On the other hand, as shown in FIG. 6, the clear paint used in the clear inner plate correction step 5 in the present embodiment includes the first base coating step 3, the second base coating step 4, and the clear coating step 6 shown in FIG. Since it is a clear paint having a color similar to that of the coating film obtained in the above, even if the first base coat 13 and the second base coat 14 having different colors are thinly formed on the inner plate portion 33, the first base coat 13 A relatively thick colored film can be secured by the clear coat 46 formed in the clear inner plate correction step 5 together with the second base coat 14, and it is possible to suppress the color of the coating film 60 from becoming mottled.

As described above, in the present embodiment, as compared with the comparative example, the clear paint used in the clear inner plate correction step 5 is subjected to the first base coating step 3, the second base coating step 4 and the clear coating step 6 shown in FIG. The coating quality of the inner plate portion 33 can be easily improved only by using a clear coating having a color similar to that of the obtained coating film.
Further, in the present embodiment, since the clear inner plate correction step 5 is performed before the clear coating step 6, even if the surface of the clear coat 46 formed in the clear inner plate correction step 5 is uneven, the clear inner plate is corrected thereafter. By coating the inner plate portion 33 together with the outer plate portion 34 in the coating step 6, unevenness on the surface of the coating film 50 of the inner plate portion 33 can be suppressed.

Although the description of the embodiment is completed above, the aspect of the present invention is not limited to this embodiment. For example, in the above embodiment, the metallic coating is performed using a metallic paint containing the glittering material 10, but the present invention can be applied as long as the coating does not contain the glittering material 10 but is colored.
Further, the painting process of the present invention can be widely applied to a vehicle for painting the outer plate portion and the inner plate portion.

2 Base inner plate correction process (inner plate painting process)
3 1st base coating process (outer panel coating process)
4 Second base coating process (outer panel coating process)
5 Clear inner plate correction process (inner plate clear painting process)
6 Clear painting process (outer panel clear painting process)
12 Inner plate coloring film 13 First base coat (base coat)
14 Second base coat (base coat)
16 Clear coat (clear coat for outer panel)
33 Inner plate part 34 Outer plate part 40 Coating film (Outer plate coating comprehensive film, outer plate coating film)
46 Inner plate correction clear coat (clear coat for inner plate)
50 Coating film (Inner plate coating comprehensive film, Inner plate coating film)

Claims (5)

A vehicle having an inner plate coating film formed on an inner plate portion that is visible from the outside of the vehicle when the opening / closing portion of the vehicle is opened, and an outer plate coating film formed on the outer plate portion of the vehicle. ,
The outer panel coating film has a base coat which is a colored film having a colored paint and a clear coat for an outer panel which is a transparent film formed on the base coat.
The inner plate coating film is formed by forming an inner plate coloring film which is a coloring film and a clear coating for an inner plate which is a coloring film having a clear paint of the same color or a similar color as the outer plate coating film on the inner plate coloring film. A vehicle characterized by having. A claim, wherein the outer panel coating film has a first base coat and a second base coat having a colored paint having a color different from that of the first base coat on the first base coat. The vehicle according to 1. According to claim 1 or 2, the outer plate portion is a door of the vehicle, and the inner plate portion is an edge portion of a door opening of the vehicle facing the door when the door is closed. The listed vehicle. Clear paint for the outer panel painting process, which paints the outer panel of the vehicle with colored paint, and the inner panel, which is a part that can be seen from the outside of the vehicle when the opening and closing part of the vehicle is opened after the outer panel painting process. A method of painting a vehicle having an inner plate clear coating step of applying a clear coat for an inner plate and an outer plate clear coating step of applying a clear paint to the outer plate portion after the inner plate clear coating step. And
The clear paint applied in the outer panel clear coating step is transparent and is transparent.
A method for painting a vehicle, wherein the clear paint applied in the inner plate clear coating step is a colored paint having the same color as or a similar color to the colored paint applied in the outer plate painting step. The vehicle coating method according to claim 4, further comprising an inner plate coating step of applying the inner plate portion with a colored paint before the outer plate coating step.

Images