KR20050039892A - A painting method for removing scars on automobiles using low-pressured spray gun - Google Patents

Abstract

The present invention relates to a method for painting a car scratch using a low pressure spray gun, and more particularly, to remove scratches on the surface of a car and to coat paint and a transparent coating agent using a low pressure spray gun. The present invention relates to a method for painting a scratch on a car using a low pressure spray gun which compensates the coating thickness and improves workability so as to prevent uniformity and color variation and to prevent damage to the painted portion.

Accordingly, the present invention provides a first foreign matter removing step (10) of removing foreign matter by using a compound to be painted on the vehicle; A scratch removal step (11) of polishing the scratches which have passed through the first foreign matter removing step (10) with sand paper and applying a solidifying material, and then again polishing with sand paper; A primary coating process (12) for spray-coating a portion where the scratches are removed through the scratch removing step (11) with paint at a predetermined distance; A first heat treatment step 13 of cooling the paint portion that has undergone the first coating step 12 after drying for a predetermined time with a heat dryer; A secondary foreign material removal step (14) of removing the foreign matter by polishing the dried and cooled paint portion by sand paper through the primary heat treatment step (13); A secondary coating step (15) of spraying and coating a portion from which the foreign matter is removed by the secondary foreign material removing step (14) with paint at a farther coating distance than the first coating step (12); A first transparent coating step 16 of coating the paint part that has passed through the second coating step 15 with a transparent coating agent at a predetermined distance; A second transparent coating process 17 for coating with a transparent coating agent at a shorter distance than the first transparent coating process 16; A third transparent coating process 18 of coating a transparent coating agent at a shorter distance than the second transparent coating process 17; A second heat treatment step 19 of cooling the coated portion through the third transparent coating process 18 after drying for a predetermined time with a heat dryer; It characterized in that it comprises a gloss process (20) for polishing the dried and cooled coating portion with a compound through the secondary heat treatment process 19.

Description

A painting method for removing scars on automobiles using low-pressured spray gun}

The present invention relates to a method for painting a car scratch using a low pressure spray gun, and more particularly, to remove scratches on the surface of a car and to coat paint and a transparent coating agent using a low pressure spray gun. The present invention relates to a method for painting a scratch on a car using a low pressure spray gun which compensates the coating thickness and improves workability so as to prevent uniformity and color variation and to prevent damage to the painted portion.

In general, a vehicle released from a car manufacturing factory is frequently caused by contact or collision while driving, scratches and scratches due to nails, knives, or other sharp objects. The paint may be peeled off, and the appearance of such a car, especially the surface of the car, has a great effect on the quality and life of the car, and in order to prevent corrosion of metals, when the outside of the car is damaged, it visits a repair shop and repaints it at a high cost. It is true.

Conventionally, a conventional vehicle paint apparatus which has been used for this purpose is to supply high pressure compressed air generated by a compressor to a spray gun to spray paint by spraying paint, wherein the compressor is a power, that is, a motor or a motor. It rotates an impeller-type rotor or reciprocates a piston, and conveys gas, and it means a pressure ratio of 2 or more and a delivery pressure of 1 kgf / cm <^2> or more.

On the other hand, the spraying of paint on the surrounding environment due to dust, etc. during spray coating causes environmental pollution problems. Recently, in order to cope with environmental regulations, interest in the use of a low pressure spray gun that sprays the paint with a solid flow of low pressure air is increasing. It is becoming.

This low pressure spray gun uses less than 0.7kgf / cm ² low pressure air, so there is less overspray than general spray guns using high speed and high pressure air in spraying operations.

However, the gas for spraying the paint of the low pressure spray gun is low pressure, and when spraying the paint with such low pressure air, the painting work is slow, the paint strength of the paint is short, and the life is short. It is not possible to follow the coating thickness when using a general spray gun, there is a problem that the coating is damaged even when grazing, such as twigs.

In addition, there was a problem in that the coating quality is degraded due to the inflow of foreign matters such as dust and dirt with the air coming from the outside during the painting work.

An object of the present invention for solving the above-mentioned problems is to compensate for the coating thickness in coating the paint and the transparent coating agent using a low pressure spray gun to remove scratches on the surface of the vehicle and to prevent the coating site from being damaged. The present invention provides a method of painting a scratch on a car using a low pressure spray gun that improves workability and prevents uniformity of color between existing paint and newly applied paint.

The present invention for achieving the above object is the first foreign matter removal step of removing the foreign matter by using a compound to the painted portion of the vehicle; A scratch removal step of polishing the scratched portion that has been subjected to the first foreign matter removing process by sand paper and applying a solidifying material, and then again by sand paper; A primary coating process of spray-coating a portion where the scratch is removed through the scratch removing process with paint at a predetermined distance; A primary heat treatment step of cooling the paint portion which has undergone the primary coating process by drying with a heat dryer for a predetermined time; A secondary foreign material removal step of removing foreign matters by polishing the dried and cooled paint part by sand paper through the primary heat treatment process; A secondary coating step of spray coating the portion from which the foreign matter is removed by the second foreign matter removing step with paint at a farther coating distance than the first coating step; A first transparent coating process of coating the paint part that has undergone the second coating process with a transparent coating agent at a predetermined distance; A second transparent coating process of coating with a transparent coating agent at a shorter distance than the first transparent coating process; A third transparent coating process of coating with a transparent coating agent at a shorter distance during the second transparent coating process; A secondary heat treatment step of cooling the coated portion after drying for a predetermined time with a heat dryer through the third transparent coating process; It characterized by consisting of a gloss process to polish the coating portion dried and cooled through the secondary heat treatment process with a compound.

In addition, the first foreign matter removing step of removing the foreign matter by using the compound to the painted portion of the vehicle; A scratch removal step of polishing the scratched portion that has been subjected to the first foreign matter removing process by sand paper and applying a solidifying material, and then again by sand paper; A first coating process of spray-coating a portion of which the scratch is removed through the scratch removing process with paint at a predetermined distance, but coating 4-6 cm beyond the boundary of the solidifying material; A primary heat treatment step of cooling the paint portion which has undergone the primary coating process by drying with a heat dryer for a predetermined time; A secondary foreign material removal step of removing foreign matters by polishing the dried and cooled paint part by sand paper through the primary heat treatment process; The second foreign material is coated by spraying the part where foreign material is removed by the second foreign material removal process with paint at a farther coating distance than in the first painting process, but it is coated 2-4 cm beyond the border of the painted ingot in the first painting process. Painting process; A first transparent coating fixing the paint part which has undergone the second coating process with a transparent coating agent at a predetermined distance, but coating 4 to 6 cm beyond the boundary line of the waste insert part; A second transparent coating process of coating with a transparent coating agent at a shorter distance than the first transparent coating process but coating 1 to 2 cm smaller than the coating boundary line coated in the first transparent coating process; A third transparent coating process of coating with a transparent coating agent at a shorter distance than the second transparent coating process but coating 1 to 2 cm smaller than a coating boundary coated in the second transparent coating process; A secondary heat treatment step of cooling the coated portion after drying for a predetermined time with a heat dryer through the third transparent coating process; It characterized by consisting of a gloss process to polish the coating portion dried and cooled through the secondary heat treatment process with a compound.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a process chart showing a scratch coating method for a vehicle using a low pressure spray gun according to the present invention.

Example 1

Automobile scratch coating method using a low-pressure spray gun according to the first embodiment of the present invention, the first foreign matter removal step 10, the scratch removal step (11), the primary coating step (12), the first heat treatment step (13) ), Secondary foreign material removal process (14), secondary coating process (15), primary transparent coating process (16), secondary transparent coating process (17), tertiary transparent coating process (18), secondary heat treatment process 19, the gloss process 20 is carried out.

First, the first foreign matter removing step 10 is a process of removing foreign matters, etc. using a 1000 mesh compound on the scratches, that is, the portions to be painted, on the automobile.

The scratch removal step 11 is to remove the scratches by polishing the scratched portion from which the foreign matter and the like has been removed by sand paper, and then applying a solidified material such as gypsum or mud to the scratched portion. Done. Then, the solidified material applied to the scratch is polished again with sandpaper so as to be the peripheral surface and the flat surface.

The primary painting step 12 is applied to the vehicle body while maintaining the distance of 9 to 11 cm, preferably 10 cm, from the surface to be scratched using the low pressure spray gun through the scratch removing step 11. Spray coating of the same color

At this time, the low-pressure spray gun is coated in the horizontal direction, the upper and lower spaced apart 3cm intervals are preferably applied twice as a whole.

That is, to maintain a 9 to 11cm distance from the surface to be painted, and to paint at an interval of 3cm up and down, to paint the thick and thick paint so that the solidified material applied to the scratch in the scratch removal step (11) is not visible. At this time, the color of the painted surface is still different from the surrounding color.

The primary heat treatment process 13 is a process of heating the paint portion applied through the primary coating process 12 with a heat dryer for about 10 minutes and then cooling for approximately 5 minutes.

That is, when foreign matter such as a pin roll or dust is attached together when the paint is applied in the primary painting process 12, after the paint is applied in the primary painting process 12 to remove the foreign matter, Is heated quickly with a heat dryer to dry quickly and the heated portion is to cool the sandpaper work in the secondary foreign material removal process 14 below.

As described above, the secondary foreign material removal process 14 is a process of removing such foreign matter when foreign matters are attached together when the paint is applied in the primary coating process 12. At this time, the foreign material is removed by grinding with 1000 mesh sandpaper.

The secondary coating process 15 preferably uses a low pressure spray gun to remove the foreign matter removed through the secondary foreign material removal process 14, using a low pressure spray gun, which is 14 to 16 cm, which is farther away from the primary coating process 12. Is a process of spray coating the paint of the same color painted on the body while maintaining a distance of 15 cm.

At this time, the low-pressure spray gun is applied in the horizontal direction, spaced apart at intervals of 5cm up and down, it is preferable to apply three times as a whole.

That is, by maintaining a distance of 14 to 16cm, which is farther than the first coating process 12, the upper and lower intervals are also maintained at 5cm, and because of the farther distance than the first coating process 12, the fine particles are coated. This is possible, and the particles are applied three times because they are dispersed.

In addition, after the secondary coating process 15, the color and the surrounding color of the applied paint surface are uniform and there is no deviation.

Then, after the secondary coating process (15) using a low pressure spray gun to perform a transparent coating process (16) (17) (18), which proceeds to a total of three times, the strength of the painted part It is possible to prevent the coating part from being broken by a constant external force and to obtain a gloss effect.

First, the primary transparent coating process 16 is a process of spraying and coating a transparent coating agent while maintaining a distance of 19 to 21 cm, preferably 20 cm, from the surface to be coated on the part of the paint that has undergone the second coating process 15. .

At this time, it is preferable to spray the low pressure spray gun in the horizontal direction, spaced apart at intervals of 5cm up and down, and to apply twice as a whole.

That is, to maintain a distance of 19 ~ 21cm from the surface to be painted, and to paint at 5cm intervals up and down, when spraying at a long distance of 19 ~ 21cm using a low pressure spray gun is dried while being sprayed immediately to the paint portion It is attached.

The second transparent coating process 17 is a process of spraying and coating a transparent coating agent while maintaining a distance of 14 to 16 cm, preferably 15 cm, which is shorter than that of the first transparent coating process 16.

At this time, it is preferable to spray the low pressure spray gun in the horizontal direction, spaced apart at intervals of 3cm up and down, and to apply twice as a whole.

That is, maintaining a distance of 14 to 16 cm, which is a shorter distance than the first transparent coating process 16, and painting at intervals of 3 cm above and below is already transparent coating agent on the paint portion during the first transparent coating process 16. Is attached to the primary to be sprayed here again to the transparent coating agent serves to hold each other to improve the adhesive force, and to prevent the flow that can occur when spraying at close range.

The third transparent coating process 18 is carried out after 2 to 4 minutes, preferably 3 minutes after the second transparent coating process 17, 9 is a shorter distance than the second transparent coating process 17 Preferably it is a process of spraying and coating a transparent coating agent in the state which kept the distance of -11cm.

At this time, the low pressure spray gun is sprayed in the horizontal direction, and sprayed at intervals of 3cm apart up and down, it is preferable to apply once.

Here, proceeding after 2 to 4 minutes after the second transparent coating process 17 maintains a shorter distance of 9 to 11 cm in a state that the coated surface is not dried during the second transparent coating process 17. And, to prevent this because it flows down when the paint is spaced up and down 3cm.

On the other hand, by proceeding the transparent coating process (16) (17) (18) three times and gradually shorten the coating distance, the adhesion between the transparent coating agent is improved and does not flow down in the working process to obtain an even coating surface There is an improvement in strength.

In addition, the transparent coating process (16) (17) (18) is not necessarily limited to the third, it is important to gradually shorten the coating distance even if many times.

The secondary heat treatment process 19 is a process of drying the coated portion through the third transparent coating process 18 with a heat dryer for about 20 minutes and then cooling it for about 20 minutes. By quickly drying and cooling the coated portion, the below gloss process 20 can be performed smoothly.

At this time, it is preferable that the heat dryer maintains a distance of about 50 cm from the surface to be heated.

Finally, the gloss process 20 is a process of polishing the dried and cooled coating part with a compound through the secondary heat treatment process 19.

In addition, the gloss process 20 is preferably polished sequentially with 1000 mesh, 2000 mesh, 3000 mesh compound, which is the orange peel (convex phenomenon) remaining on the coated surface after the secondary heat treatment process (19) It is removed and polished to a flat surface.

Example 2

The first embodiment is a process of painting the whole when the surface to be painted, such as a door of a car, is relatively wide, and in the second embodiment, a coating method which is used for a relatively small portion of the scratch, that is, partial coating.

In the second embodiment, as in the first embodiment, the first foreign matter removing step 10, the scratch removing step 11, the first painting step 12, the first heat treatment step 13, and the second foreign matter removing step 14 are performed. , Secondary coating process (15), primary transparent coating process (16), secondary transparent coating process (17), tertiary transparent coating process (18), secondary heat treatment process (19), polishing process (20) Is done.

That is, the second embodiment proceeds to the same process as the first embodiment described above, and the description of the entire process will be omitted here, but only the wrong process will be described.

First, the first painting process 12 is the same color painted on the vehicle body while maintaining a distance of 9 to 11 cm, preferably 10 cm, from which the solidified material is applied while the scratch removing process 11 is applied. Spray coating of the coating, but the coating of 4-6cm, preferably 5cm more than the boundary of the solidified material.

That is, since the surface can be polished to the peripheral part when the solidifying material is sandpaper polished in the scratch removal process 11, the peripheral part of the first coating process 12 is 4 to 6 cm beyond the boundary line of the solidified material. Will paint until.

At this time, the low-pressure spray gun is coated in the horizontal direction, the upper and lower spaced apart 3cm intervals are preferably applied twice as a whole.

The secondary coating process 15 preferably uses a low pressure spray gun to remove the foreign matter removed through the secondary foreign material removal process 14, using a low pressure spray gun, which is 14 to 16 cm, which is farther away from the primary coating process 12. While spraying the paint of the same color painted on the vehicle body while maintaining a distance of 15cm, the paint is applied over 2 ~ 4cm, preferably 3cm more than the paint boundary painted in the primary painting process (12).

That is, when the paint portion is polished by sand paper in the second foreign matter removing step 14, the peripheral part may be polished, so the second coating step 15 passes 2 to 4 cm more than the paint boundary line, To paint the site.

At this time, the low-pressure spray gun is applied in the horizontal direction, spaced apart at intervals of 5cm up and down, it is preferable to apply three times as a whole.

The first transparent coating process 16 is sprayed with a transparent coating agent while maintaining a distance of 19 to 21 cm, preferably 20 cm, from the surface to be painted the second part of the coating process 15, the second coating The coating is carried out 4-6 cm, preferably 5 cm, beyond the boundary of the painted portion painted in the step (15).

That is, when the coating is applied only to the painted portion painted in the secondary coating process 15, a layer is formed at the portion, so that the first transparent coating process 16 passes over 4 to 6 cm above the paint boundary and coats the peripheral portion thereof. To do.

At this time, it is preferable to spray the low pressure spray gun in the horizontal direction, spaced apart at intervals of 5cm up and down, and to apply twice as a whole.

Subsequently, the second transparent coating process 17 coats 1 to 2 cm smaller than the coating boundary line coated in the first transparent coating process 16, and in the third transparent coating process 18, the second transparent coating process. The coating is carried out 1 ~ 2 cm smaller than the coating boundary coated in (17) so that no layer is formed after the coating is completed.

According to the present invention described above, by coating a paint and a transparent coating agent using a low pressure spray gun to remove scratches on the surface of the car, the coating area is not damaged even when a certain external force is applied, and the newly applied paint And the color of the existing paint is uniform, there is no deviation, there is no layer and workability is improved.

1 is a process chart showing a scratch coating method for a vehicle using a low pressure spray gun according to the present invention.

<Code Description of Main Parts of Drawing>

10: first foreign matter removal process 11: scratch removal process

12: 1st coating process 13: 1st heat treatment process

14: 2nd foreign matter removal process 15: 2nd painting process

16: 1st transparent coating process 17: 2nd transparent coating process

18: 3rd transparent coating process 19: 2nd heat treatment process

20: polishing process

Claims (8)

Primary debris removal step (10) of removing debris by using a compound to the painted portion of the vehicle; A scratch removal step (11) of polishing the scratches which have passed through the first foreign matter removing step (10) with sand paper and applying a solidifying material, and then again polishing with sand paper; A primary coating process (12) for spray-coating a portion where the scratches are removed through the scratch removing step (11) with paint at a predetermined distance; A first heat treatment step 13 of cooling the paint portion that has undergone the first coating step 12 after drying for a predetermined time with a heat dryer; A secondary foreign material removal step (14) of removing the foreign matter by polishing the dried and cooled paint portion by sand paper through the primary heat treatment step (13); A secondary coating step (15) of spraying and coating a portion from which the foreign matter is removed by the secondary foreign material removing step (14) with paint at a farther coating distance than the first coating step (12); A first transparent coating step 16 of coating the paint part that has passed through the second coating step 15 with a transparent coating agent at a predetermined distance; A second transparent coating process 17 for coating with a transparent coating agent at a shorter distance than the first transparent coating process 16; A third transparent coating process 18 of coating a transparent coating agent at a shorter distance than the second transparent coating process 17; A second heat treatment step 19 of cooling the coated portion through the third transparent coating process 18 after drying for a predetermined time with a heat dryer; Car scratch coating method using a low-pressure spray gun, characterized in that it consists of a gloss process (20) for polishing the dried and cooled coating portion with a compound through the secondary heat treatment process (19). Primary debris removal step (10) of removing debris by using a compound to the painted portion of the vehicle; A scratch removal step (11) of polishing the scratches which have passed through the first foreign matter removing step (10) with sand paper and applying a solidifying material, and then again polishing with sand paper; A first coating process 12 for spray-coating a portion where the scratches are removed through the scratch removing process 11 with a paint at a predetermined distance, the coating being passed 4 to 6 cm beyond the boundary of the solidifying material; A first heat treatment step 13 of cooling the paint portion that has undergone the first coating step 12 after drying for a predetermined time with a heat dryer; A secondary foreign material removal step (14) of removing the foreign matter by polishing the dried and cooled paint portion by sand paper through the primary heat treatment step (13); After the second foreign substance removal process 14, the portion where the foreign substances have been removed is spray-coated with paint at a farther coating distance than in the first painting process 12, but the waste insert boundary line painted in the primary painting process 12 A secondary coating step (15) for coating by turning over 2 to 4 cm; A first transparent coating fixing (16) for coating the paint part subjected to the second coating process (15) with a transparent coating agent at a predetermined distance, but coating 4-6 cm beyond the boundary line of the closed insert part; A second transparent coating process 17 coated with a transparent coating agent at a shorter distance than the first transparent coating process 16, but coating 1 to 2 cm smaller than a coating boundary coated in the first transparent coating process 16; A third transparent coating process 18 coated with a transparent coating agent at a shorter distance than the second transparent coating process 17 but coating 1 to 2 cm smaller than a coating boundary coated in the second transparent coating process 17; A second heat treatment step 19 of cooling the coated portion through the third transparent coating process 18 after drying for a predetermined time with a heat dryer; Car scratch coating method using a low-pressure spray gun, characterized in that it consists of a gloss process (20) for polishing the dried and cooled coating portion with a compound through the secondary heat treatment process (19). The method according to claim 1 or 2, The primary coating step 12 is to maintain a distance of 9 to 11cm from the surface to be painted, and to paint in the transverse direction, the entire surface of the car with a low pressure spray gun, characterized in that the coating multiple times at intervals of 3cm. How to paint. The method according to claim 1 or 2, The secondary coating process 15 maintains a distance of 14 to 16 cm from the surface to be painted, and paints the entire surface several times at intervals of 5 cm up and down, while painting in the horizontal direction. How to paint. The method according to claim 1 or 2, The primary transparent coating process 16 is to maintain a distance of 19 ~ 21cm from the surface to be coated, and to paint in the transverse direction, but the entire upper and lower intervals 5cm intervals, the automobile using a low pressure spray gun, characterized in that How to paint scratches. The method according to claim 1 or 2, The secondary transparent coating process 17 is to maintain a distance of 14 to 16cm from the surface to be coated, and to paint in the transverse direction, but the whole, a plurality of times with a 3cm interval up and down, the vehicle using a low pressure spray gun How to paint scratches. The method according to claim 1 or 2, The third transparent coating process 18 proceeds 2 to 4 minutes after the second transparent coating process 17 and maintains a distance of 9 to 11 cm from the surface to be coated, and paints in the horizontal direction, but 3 cm up and down Automobile scratch coating method using a low pressure spray gun, characterized in that the coating at intervals. The method according to claim 1 or 2, The polishing process is a car scratch coating method using a low pressure spray gun, characterized in that the sequential polish to 1000 mesh, 2000 mesh, 3000 mesh compound.