KR100749352B1 - Device of partially coating crack of an automobile - Google Patents

Abstract

A method for partially coating cracks of a vehicle is provided to minimize a partially coated part by performing partial coating after polishing the correspondent part. A method for partially coating cracks(12) of a vehicle comprises the steps of: polishing the entire panel including a damaged part in a coating film state of the new vehicle and then washing off dregs of a brightener by using a neutral detergent; polishing a part to be coated with a primer(13) and a part to be coated with new color paint(14) by using a sand paper of #1000, after removing the cracks; polishing a part to be coated with transparent paint(15), by a sand paper of #1500; applying the primer on the crack removed part; shielding the crack part by firstly applying the mixture produced by mixing the color paint and a diluent at the rate of 1:1, on the crack, secondly coating the edge of the firstly coated part with the mixture produced by mixing the paint and the diluent used for first application at the rate of 1:1, and coating the edge of the secondly coated part with the mixture produced by mixing the paint and the diluent used for second application at the rate of 1:1; and forming a transparent coating film by applying the transparent paint on the part coated with the color paint, 2~3 times, applying the mixture produced by adding the diluent of 100% to the paint used for first application, on the firstly coated edge 1~2 times, and applying the mixture produced by adding the diluent of 100% to the paint used for second application, on the secondly coated edge and a part polished by the sand paper of #1500 1~2 times.

Description

Device of Partially Coating Crack of an Automobile}

1 is a process chart for explaining a conventional partial coating method

2 is a process chart for explaining a conventional partial coating method

3 is a state in which the interface is formed on the existing coating surface and the repainting surface by repainting the coating portion of the primer paint

Figure 4 is a state diagram showing the process of gradually applying a thin coating from the repainting surface to the existing coating surface

5 is a process chart for explaining a partial coating method of the present invention.

6 is a plan view for explaining a partial coating method of the present invention;

Figure 7 is a longitudinal cross-sectional view for explaining the process of applying the color paint and transparent paint

Explanation of symbols on the main parts of the drawings

11: panel 12: scratches

13: primer 14: color paint

15: clear paint

The present invention relates to a partial coating method for restoring a vehicle body, a door, a bonnet, a trunk lid, or the like when the paint surface is slightly peeled off or when the metal plate is slightly crushed. The present invention relates to a method of partially scratching a part of a vehicle in which the scratched part is almost completely restored in a short time without painting the entire scratched panel when it is crushed so that it is not completely peeled off.

In general, if any part of the paint surface is damaged by inadvertent dents, scratches, or parking while driving, it will damage the appearance of the car. Therefore, the paint surface damaged by repainting, etc. must be restored to its original state. do.

1 is a process chart for explaining a conventional partial coating method, when the painted surface of the car is damaged and want to repaint, first using a degreasing agent to remove oil stains and wax residues on the damaged portion of the coating film, at this time The area to be degreased is the entire panel with damaged coating (S1).

That is, even if some of the doors, bonnets, etc. are damaged, it means the entire surface thereof.

If only the paint coating area (painting surface) is damaged after the degreasing of the panel surface is completed, sand paper is used to polish the interface to prevent the step from occurring on the damaged area and the existing painting surface. If irregularities occur due to damage, putty is applied to recover the irregularities, and then the ground work is performed by using sandpaper to flatten the surface (S2).

After completing the work on the damaged part of the coating film, primer paint is evenly applied to the work work area (polishing part or putty part) in order to improve the adhesion of the top coat and the corrosion of the panel. )

After the applied primer paint is dried, the particles are smoothly polished to remove irregularities using fine sandpaper to the application site of the primer paint and the adjacent top coat site. (S4)

After that, put the paint formulated to match the color of the existing paint surface into the spray gun, apply it to the entire panel (bonnet, door, etc.) including the damaged part of the coating film (S5), and then perform heat treatment to finish the process. (S6)

However, this conventional partial coating method has the following problems.

First, even if the paint surface is partially damaged, the entire panel to which the damaged part belongs should be painted, so the amount of paint is increased, which has a significant effect on environmental pollution.

Second, because the work takes a long time according to the many parts of the painting did not meet the needs of customers for quick repair.

Third, when the whole of the panel is painted, the color difference with adjacent panels occurs due to the fading of the existing painted surface, which damages the overall appearance of the vehicle.

In consideration of the above-mentioned problems, a partial coating method (also called a 'color match') has been developed and used to restore the damaged part to its original state without painting the entire panel including the damaged part. It will be described in more detail with reference to.

Figure 2 is a process diagram for explaining a conventional partial coating method, Figure 3 is a state diagram formed on the existing coating surface and the repainting surface by repainting the coating site of the primer paint and Figure 4 is gradually from the repainting surface to the existing coating surface This is a state diagram showing the process of applying thinly.If the paint surface is damaged after removing the grease and wax residue on the site to be repainted (T1), use sand paper to remove the step between the damaged area and the existing paint surface. If the surface is polished so as not to be generated, and if irregularities are generated due to damage to the panel, putty is applied to recover the irregularities, and then the ground work is performed by using sandpaper.

After that, to improve the adhesion of the top coat and the corrosiveness of the panel to the lower work area (polishing site or putty site), the primer paint is evenly applied (T3) and then dried, and then the application site of the primer paint and The abrasive grains are smoothly polished to remove the irregularities by using fine sand paper to the adjacent top coat. (T4)

After smoothly polishing the interface between the repainted surface and the existing paint surface, the paint blended according to the color of the existing paint surface is put into the spray gun and applied until the applied primer paint is completely concealed. T5)

When the painting operation is performed in the above-described manner, an interface 3 is generated between the repainting surface 2 and the existing painting surface 1 as shown in FIG. 3.

Accordingly, in order to remove the boundary surface 3 between the repainting surface 2 and the existing coating surface 1, the top coating coating is applied so that the color is gradually applied from the repainting surface toward the existing coating surface.

In this way, when the top coat coating is applied so that the color is gradually applied from the repainting surface (2) toward the existing painting surface (1), the repainting surface and the boundary surface (3) of the existing painting surface are mixed. There will be no color difference.

As described above, an overspray phenomenon occurs between the repainted surface 2 and the existing painted surface 1 by performing a partial coating operation by the spray gun.

In other words, when the color is gradually applied from the repainting surface (2) toward the existing coating surface (1) side, the sprayed paint is blown to the existing painting surface (1) side, leaving marks and at the same time reducing the gloss. Overspray blending should be performed to remove the paint.

To this end, the diffusion paint removal solvent is put in a separate spray gun and then sprayed directly onto the overspray marks before the paint is dried to remove the oversprayed paint (T7).

After locally painting only the damaged parts in this way, the coating work is completed by heat-treating and polishing the painted parts. (T8)

However, this partial coating method does not paint the entire surface of the damaged panel, thereby minimizing the amount of paint used to reduce environmental pollution, and has the advantage of enabling rapid repair by painting only the damaged parts, but the following problems occur It became.

First, after the partial painting was completed, the work was delayed because it was necessary to wait until the repainted part was dried because the painting work was carried out after drying.

Second, due to the indefinite relationship between repainting parts, the use of paint increased due to the widening of the coating parts.

Third, the top blending coating and overspray blending work to prevent the level difference between the existing paint surface and the repainting surface requires a high level of proficiency.

Fourth, there is a limit to the rapid repair due to the complicated process of the partial coating method, there was also a problem of polluting the environment according to the repeated painting work.

The present invention has been made in order to solve such a conventional problem, the area of the repainting site by performing a gloss work on the entire panel including the coating site before the painting work to make a coating film of the new car state and then performing a partial coating work The goal is to minimize

Another object of the present invention is to divide the coating work of the color paint and the transparent paint several times, to gradually reduce the concentration of the paint to solve the problems caused by the paint flying off the edge during the painting work.

According to an aspect of the present invention for achieving the above object, all of the panels including the damaged portion is polished to maintain a new coating film, and then using a neutral detergent to wipe off the polish residues, and known coating process After removing scratches, polish the part to be coated with primer and the new color to be painted with # 1000, and the part to be coated with transparent paint with # 1500, respectively. And coating the color paint and the diluent in a 1: 1 ratio, and then applying the first removal of the scratch removal site to conceal the scratch, and then mixing the paint and the diluent used in the first application in a 1: 1 ratio. First, apply the edge part applied secondly, mix the paint and diluent used in the second application in 1: 1 ratio again and apply to the second applied edge. Then, apply a transparent paint 2-3 times to the color-coated area to form a transparent coating film, and then add 1-2% of the diluent to the paint used for the first application, apply 1-2 times to the first applied edge, 3 Car coating is characterized in that the car is sequentially carried out by adding 100% of the diluent to the paint used in the second coating, and applying it to the edges of the second coating and the part polished with # 1500 polishing, and drying them one to two times. A slight scratched part coating method is provided.

Hereinafter, the present invention will be described in more detail with reference to FIGS. 5 to 7 as an embodiment.

5 is a process chart for explaining a partial coating method of the present invention, Figure 6 is a plan view for explaining a partial coating method of the present invention, Figure 7 is a longitudinal cross-sectional view for explaining the process of applying a color paint and a transparent paint, The present invention removes the foreign matter on all of the panel 11 including the damaged portion and then performs a polishing operation so that the damaged portion maintains a new coating state.

At this time, the polishing operation is carried out by applying a compound # 2500 to the polisher, the polishing residues generated after the polishing operation is wiped clean using a neutral detergent. (S101)

As described above, if the polishing work is performed on the entire panel 11 including the scratched portion before painting the scratched portion, the repainted portion can be minimized, thereby reducing the time and cost according to the partial coating, and painting Since it is not necessary to perform a separate gloss work after completing the work, there is no need to perform heat treatment work according to the implementation of the gloss work has the advantage that can reduce the work time and cost.

As described above, after finishing the glossing of the entire panel including the coating site, the scratches 12 formed on the panel 11 are removed as in the known coating process.

That is, the part to be coated with the primer 13 and the part to be coated with the new color paint 14 is polished with # 1000 polishing paper, and the part to be coated with the transparent paint 15 is polished with # 1500 polishing paper, respectively. (S102)

As described above, after the scratches 12 formed on the panel 11 are removed and polished with abrasive paper, the primer 13 is coated on the scratch removal portions. (S103)

The primer 13 may be any one of a transparent primer or a gray primer, but it is more preferable to use a transparent primer rather than a gray primer.

In the case of using a gray primer, a masking work process for primer coating, primer coating process, primer drying process, primer polishing process, etc. should be performed. By the painting process, it is possible to finish by applying color and transparent coating on it.

The transparent primer to be applied to the present invention is a base fix (product name) made by Shiken's Co., Ltd. (manufacturer), but other transparent primers having the same physical properties can also be used.

After the primer 13 is coated on the scratch removal site, the color paint 14, which is the color of the vehicle body, is applied. The operation is performed by mixing the color paint and the diluent in a 1: 1 ratio and then removing the scratches as shown in FIG. Apply primarily to cover up the edges of the area.

Thereafter, the coating material used for the first coating is mixed with the diluent in a 1: 1 ratio, and the second portion is polished with # 1000 abrasive, which is the edge of the first coating.

After the second coating of the color paint is completed, the paint used in the second coating is mixed with the diluent in a 1: 1 ratio, and then applied to the part polished with # 1500 abrasive, which is the edge of the second coating. The work is completed (S104).

After the coating operation of the color paint 14 is completed by the above process, the transparent paint 15 is applied to a portion where the color paint is coated to form a transparent coating film. The coating work of the transparent paint is performed as follows. .

The transparent paint 15 is applied 2-3 times to the part where the color paint 14 is coated to form a transparent paint film, and then, 100% of the diluent is added to the paint used for the first application to be applied 1-2 times to the first applied edge. In the third coating, a transparent coating film is formed by adding 100% of a diluent to the paint used in the second coating and applying it once or twice to the edge of the second coating and the part polished with # 1500 polishing. S105)

In the present invention, the spray gun used for the coating of the primer 13, the color paint 14, and the transparent paint 15 is not high pressure (1.5-2.0kg / cm ² ) used in general painting, but 0.015-0.025kg / Spray gun using a low pressure of cm ² .

As a result, the overspray phenomenon that occurs during the coating of the paint is minimized, thereby minimizing the repainting part performed in the post process.

In other words, 70% of the sprayed material is oversprayed by using a high pressure spray gun, but by using a low pressure spray gun, the amount of overspray can be greatly reduced to 30%.

When the paint is applied using the low pressure spray gun, if the spray pressure is 0.015kg / cm ^{2, the} spray pressure is too low and the time required for the paint is delayed. On the contrary, if the spray pressure is 0.025kg / cm ² or more, the spray pressure is It is excessively high, which increases the amount of overspray.

As described above, after the transparent coating film is formed, the partial coating work may be completed since the gloss work has been performed. However, since the foreign matter may be removed from the scratch removal area during the partial coating work, it is transparent. It is more preferable to carry out the foreign matter removing step after the paint is completely dried. (S106)

As described above, the present invention is different from the conventional method in which after performing a partial coating process and then performing a gloss work after drying, it is not necessary to perform a separate gloss work after performing a partial coating after performing a gloss work on a partial coating part. In addition, the partial coating area is minimized due to the gloss work of the partial coating part, so that the partial coating can be performed quickly and at low cost.

Claims (4)

Polish all the panels including the damaged area to maintain the new coating film, and then wipe off the polish residue with a neutral detergent, and remove the scratches, as in the known coating process, and then the primer coating Grind the new color paint area with # 1000 abrasive, and the transparent paint area with # 1500 abrasive, apply the primer to the scratch removal area, and color paint and diluent 1: After mixing at the 1st ratio, apply the first removal of scratches to cover up the scratches, mix the paint and diluent used at the 1st ratio in 1: 1 ratio, and apply the secondary applied edges 2 times. Mix the paint and diluent used in the first application in a 1: 1 ratio and apply it to the edge of the second coating, and apply the transparent paint 2-3 times to the color-coated area. After forming the transparent coating film, add 100% of the diluent to the paint used in the first application, apply 1-2 times to the edge of the first application, and in the third application, add 100% of the diluent to the paint used in the second application. A method of coating a minor scratch on a vehicle, characterized in that the step of applying to the edge applied to the secondary applied and # 1500 polished ground 1-2 times sequentially to dry. The method of claim 1, The primer, color and transparent paint is a minor scratches coating method of the vehicle, characterized in that the coating using a low pressure spray gun of 0.015-0.025kg / cm ² . The method of claim 1, Slightly scratched part coating method of the vehicle, characterized in that the primer applied to the scratched portion is a transparent primer or a gray primer. The method of claim 1, Minor scratches coating method of the vehicle, characterized in that for performing a further foreign matter removing step after the drying step is completed.

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