KR20210012136A - Vehicle wheels painted with Pearl Clear and their painting methods - Google Patents

Abstract

The present invention relates to a method of painting a pearl clear of vehicle wheels. More particularly, the present invention relates to a method of painting a pearl clear of vehicle wheels capable of forming a beautiful outer appearance by expressing a pearl particle to an outside while ensuring adhesion of a pearl when painting the vehicle wheels with the pearl, and vehicle wheels painted with a pearl clear. The method of painting a pearl clear of vehicle wheels forming a beautiful outer appearance by expressing a pearl particle to an outside while ensuring adhesion of a pearl in the vehicle wheels, comprises: a pretreatment step (first step) of removing pollutant adhering to vehicle wheels; a drying step (second step) of completely drying the vehicle wheels by hot air in a drying furnace; a primer powder painting step (third step) of coating acrylic type primer; an oven step (fourth step) for drying and melting the primer for 30 minutes at 220±20°C in the drying furnace to coat the vehicle wheels therewith; an intermediate color painting step (fifth step) of coloring the vehicle wheels; a natural drying step (sixth step) of naturally drying the vehicle wheels for 10 minutes; and a pearl painting step (seventh step) of painting the pearl.

Description

Vehicle wheels painted with Pearl Clear and their painting methods {Vehicle wheels painted with Pearl Clear and their painting methods}

The present invention relates to a pearl clear painting method, and in particular, pearl clear painting of a car wheel to enhance the appearance by expressing pearl particles to the outside while securing the adhesion of pearl when painting pearl on a car wheel. It relates to a method and a car wheel coated with pearl clear by such a coating method.

Pearl pigments are special pigments, such as interference pearls composed of a structure in which the pearl pigment is coated with translucent particles called cores, with transparent titanium dioxide, etc., colored pearls obtained by coloring the coating layer of pearl pigments in various ways, and modified from interference pearls. It can be divided into complex pearls for coloring organic pigments on the outside of.

Coating of the above various pearls on a vehicle wheel is intended not only to protect the surface of the vehicle wheel, but also to make it beautiful.

Looking at the prior art for pearl coating, the white pearl coating method for automobile bumpers and the bumpers described in Unexamined Patent Publication No. 2002-84434 (published on November 09, 2002) is a primer layer by adding an acrylic color material to a primer component. There is disclosed a white pearl coating method comprising a primer coating process of coating, an intermediate process of applying a clear and white pearl layer, a top coating process of applying a clear layer, and a baking fixation baking at 85°C for 30 minutes.

In addition, the electrodeposition coating method for expressing pearl sensation described in Registration Patent Publication No. 10-1374799 (2014. 03. 17. Announcement) includes a texture forming process of physically forming a texture on the surface of a metallic object, a cleaning process of the surface of the object A coating method for expressing a feeling of pearl through an electrodeposition coating process and a coating film drying process is disclosed.

In addition, the coating material for automobile white pearl color coating described in Registered Patent Publication No. 10-0347723 (2002. 08. 09. Announcement) limited the components of the intermediate coating material, and registered Patent Publication No. 10-0830867 (2008. 05. 21. Announcement) of the method of forming a luminous film and a luminous coating is made of a luminous base coating using a noble metal or copper colloidal particle solution containing noble metal or copper colloid particles in the substrate to be coated. After forming, a method of heating or heat setting the bright base coating film, and then forming a clear coating film and heating to form a bright coating film is disclosed. Japanese Republished Patent Publication No. 2005-092519 (2005. 10. 06. Publication) of the method of forming a luminous coating film and a luminous coating that is durable, has a high gloss, and a method of providing a luminous coating film that exhibits a metallic feel or a colored metallic feel that does not feel a feeling of metallic particles than that of a plating bath coating. Then, after forming a luminous base coating film with a luminous base coating containing a noble metal or copper colloidal particle solution containing noble metal or copper colloid particles on the substrate, the luminous base coating film is inspected or set, followed by a predetermined process. A method for forming a bright coating film for forming a clear coating film is disclosed. The coating film forming method and high-design articles of JP 2006-175385 A (published on Jul. 06, 2006) are used in various industries such as automobile parts. For products, it is intended to provide a coating film with high saturation, metallic feel, and depth.After coating a bright paint comprising a bright pigment on one side of a transparent substrate and curing, a colored pigment on the other side And/or a method for forming a multilayer coating film in which a color clear paint containing a dye is coated and cured.

Patent Document 1: Unexamined Patent Publication No. 2002-84434 Patent Document 2: Registered Patent Publication No. 10-1374799 Patent Document 3: Registered Patent Publication No. 10-0347723 Patent Document 4: Registered Patent Publication No. 10-0830867 Patent Document 5: Japanese Republished Patent Publication No. 2005-092519 Patent Document 6: Japanese Laid-Open Patent Publication No. 2006-175385

Prior art such as the above are the intermediate process of applying white pearl (Patent Document 1), the electrodeposition coating process of expressing the feeling of pearl (Patent Document 2), the intermediate pearl color coating process (Patent Document 3), and the process of forming a bright base coating film ( Patent Document 4), a process of forming a bright base coating film (Patent Document 5), a process of applying a bright pigment to one side of the substrate (Patent Document 6), and using pearl during base coating or intermediate coating , It was possible to secure the adhesion of pearl, but there was a problem that it was not possible to make the appearance beautiful due to the lack of expressing the pearl particles to the outside.

In addition, the applicant of the present invention also coated pearl together in the case of intermediate painting, but as in the prior art, although the adhesion of pearl can be sufficiently secured, expressing the pearl particles to the outside is insufficient. Despite the use of a lot of pearls or pearls, the appearance of pearls was not enough to make the appearance beautiful.

In other words, the phenomenon that the pearl particles are buried by the opaque color paint by the medium pearl color coating occurs, and only a part of the pearl contained in the medium pearl color paint is exposed to the outside. It has problems such as decreasing.

In addition, when the top coat is cleared after the middle pearl color coating is applied as described above, the middle color pearl paint itself is discolored by mixing the pearl with the middle pearl color paint.

The present invention is to solve the above problems, and an object of the present invention is to sufficiently express the sparkling effect of pearl particles to the outside.

In addition, it is an object of the present invention to enhance adhesion of pearl particles and to reduce the risk of corrosion or peeling.

In addition, it is an object of the present invention to provide a sufficient sparkling effect despite the use of a small amount of pearl particles.

In addition, it is an object of the present invention to maximize the sparkle effect by controlling the size, mixing ratio, and oven temperature of pearl particles.

The present invention is intended to achieve the above object, and consists of the following configuration.

The present invention, [1] in the pearl clear coating method of a vehicle wheel for enhancing the appearance by expressing the pearl particles to the outside while securing the pearl adhesion to the vehicle wheel, removing contaminants attached to the vehicle wheel A pretreatment step (step 1) of producing an insoluble film; Drying process of completely drying the automobile wheel with hot air in the drying furnace (Step 2);

The primer powder coating process of applying an acrylic type primer (Step 3); Oven drying in a drying furnace at 220±20° C. for 30 minutes to melt the primer and base coating on the automobile wheel (Step 4); Intermediate color painting process for coloring automobile wheels (Step 5); Natural drying step of natural drying for 10 minutes (step 6); It relates to a pearl clear coating method for automobile wheels, characterized in that it comprises a pearl coating plant (step 7) that coats pearl.

In addition, the present invention [2] in the above [1], wherein the step 1 comprises a bath washing step, a degreasing step, a first washing step, a pickling step, a second washing step, a film forming step, and a pure water washing step. It relates to a pearl clear coating method of a car wheel.

Further, the present invention relates to a pearl clear coating method of a vehicle wheel according to [3] [1], wherein the hot air temperature in the drying furnace in the step 2 is 120 to 180°C.

In addition, the present invention is a pearl clear coating method of a vehicle wheel according to [4] above [1], wherein the thickness of the coating film after drying of the undercoat coating that has undergone the oven drying step of the step 4 is 60 to 100 μm. It is about.

In addition, the present invention relates to a pearl clear coating method for a vehicle wheel according to [5] [1], wherein the step 5 represents the color of the vehicle wheel using a liquid coating color. .

Further, the present invention relates to a pearl clear coating method for a vehicle wheel according to [6] [1], wherein the intermediate color film thickness after the drying step according to the step 6 is 10 to 20 µm.

In addition, the present invention relates to a pearl clear coating method for a vehicle wheel according to [7] [1], wherein the step 7 comprises applying the pearl particles and then performing a top coat liquid transparent clear coating. .

In addition, the present invention relates to a pearl clear coating method of a vehicle wheel according to [8] above [1], wherein the step 7 comprises painting by mixing pearl particles and liquid transparent transparent clear. will be.

In addition, in the present invention, [9] in [7], the pearl particle application in the step 7 is performed by applying only the pearl particles using a pearl particle application gun (step 7-1). Transparent clear coating is to apply a top coat liquid transparent clear after pearl particle coating (Step 7-2), and after the pearl coating (Step 7-1) and top coat liquid clear clear coat (Step 7-2), an oven process (Step 7-4), and the oven process (Step 7-4) is carried out in a drying furnace, a drying temperature of 160 to 170°C, a drying time of 30 minutes, and the coating thickness after drying is 20 to 30 including the pearl particle layer thickness. It relates to a pearl clear coating method of a vehicle wheel, characterized in that the ㎛.

In addition, in the present invention, [10] in [8], the pearl particles and liquid transparent clear mixed coating in the step 7 are coated at once by mixing the pearl particles and liquid clear (Step 7-3). , After the pearl particles and liquid transparent clear mixed coating (step 7-3), an oven step (step 7-5) is performed, and the oven step (step 7-5) is in a drying furnace, a drying temperature of 160 to 170°C, It relates to a pearl clear coating method of a vehicle wheel, characterized in that the drying time passes through 30 minutes and the thickness of the coating film after drying is 15 to 25 μm.

In addition, the present invention relates to an automobile wheel coated with pearl clear obtained by the pearl clear coating method of the automobile wheel according to any one of [11] to [10], wherein the surface of the automobile wheel is primarily Firstly, it has a primer powder coating layer having a thickness of 60 to 100㎛, secondly has a medium color coating layer coated in various colors with a thickness of 10 to 20㎛, and has a pearl particle coating layer thirdly, 4 It relates to a car wheel coated with pearl clear, characterized in that it has a top coat liquid transparent clear coating layer, wherein the pearl particle coat layer and the top coat liquid transparent clear layer have a total thickness of 20 to 30 μm.

[12] In addition, in the automobile wheel coated with pearl clear obtained by the pearl clear coating method of the automobile wheel according to any one of [12] above [1] to [10], the surface of the automobile wheel is primarily Firstly, it has a base powder coating layer having a thickness of 60 to 100㎛, secondly has a medium color coating layer coated in various colors with a thickness of 10 to 20㎛, and thirdly, pearl having a thickness of 15 to 25㎛ And it relates to a pearl clear-coated automobile wheel, characterized in that consisting of a top coat liquid transparent clear coating layer.

In addition, the present invention, [13] in [9] or [10], the size of the pearl particles is 50 ~ 100㎛, the topcoat liquid transparent clear and the pearl particles are mixed in a ratio of 9:1 It relates to a pearl clear coating method of a vehicle wheel, characterized in that.

1 is a cross-sectional state diagram of a conventional pearl clear coating.
Figure 2 is a conventional pearl clear coating process diagram.
Figure 3 is a cross-sectional state diagram of the pearl clear coating of the present invention.
Figure 4 is a pearl clear coating process chart of the present invention.
5 is a detailed process chart of the pretreatment process during the pearl clear coating of the present invention.
6 is a detailed process diagram of the pearl coating process during the pearl clear coating of the present invention.
Figure 7 is a cross-sectional state diagram of a pearl clear coating of another embodiment of the present invention.
8 is a detailed process diagram of a pearl coating process during pearl clear coating according to another embodiment of the present invention.
9 is a photograph of a surface according to an embodiment of the present invention and a comparative example

Hereinafter, a preferred embodiment of the present invention will be described based on FIGS. 3 to 9.

The present invention provides a pearl clear coating method of a vehicle wheel for enhancing the appearance by expressing pearl particles to the outside while securing pearl adhesion to a vehicle wheel, removing contaminants adhering to the vehicle wheel and forming an insoluble film. A pretreatment step to generate (step 1); Drying process of completely drying the automobile wheel with hot air in the drying furnace (Step 2); The primer powder coating process of applying an acrylic type primer (Step 3); Oven drying in a drying furnace at 220±20° C. for 30 minutes to melt the primer and base coating on the automobile wheel (Step 4); Intermediate color painting process for coloring automobile wheels (Step 5); Natural drying step of natural drying for 10 minutes (step 6); It relates to a pearl clear coating method of a car wheel and a car wheel coated with pearl clear produced by this coating method, characterized in that it consists of a pearl coating plant (process 7) that paints pearl, while looking at the drawings below, Each of the above processes and the automobile wheel coated with pearl clear will be described in detail.

[Step 1: Pre-treatment process]

The pretreatment step (step 1) of the present invention is a step performed in order to improve corrosion resistance and adhesion by removing oil and other contaminants adhered to the wheel for automobiles as a coating object, and forming an insoluble film.

Step 1 is specifically made as follows. However, some processes may be repeated or omitted as necessary, that is, depending on the condition of the wheel for a vehicle to be coated.

Process 1-1: bath washing process

This is to remove contaminants (chips, dust, cutting oil, etc.) adhering to the finished vehicle wheel and to facilitate the degreasing process in the next process. This is a process of washing the vehicle wheel with water at 55 ±5℃.

The hot water washing process is a process in which primary contaminants such as cutting oil, processing chips, and dust remaining on the wheel are washed off with warm water after processing, and it is preferable to wash with warm water in the temperature range as described above. If the temperature of the water is too low, cleaning may not be performed smoothly, and if the temperature is too high, the air inside the sealed painting process is polluted due to the generation of water vapor and oil vapor.

Process 1-2: degreasing process

By the hot water washing process of step 1-1, most of the deposits such as chips are removed, but oil components such as processing oil and rust prevention oil remain in the wheel for automobiles, which is the object to be coated, so that these substances are to be removed, and saponification (saponification) reaction And an emulsification reaction.

At this time, the alkaline degreasing agent to which the surfactant to be used is added is preferable to maintain the alkalinity pt 4 to 5.

Maintaining the alkalinity as described above is because when the alkalinity is too low, the oil component is not easily removed, and when the alkalinity is too high, the degreasing component must be washed off in the next step, the water washing process, but all may not be removed.

Process 1-3: 1st water washing process

In step 1-2, the oil component and contaminants reacted with the degreasing agent are washed away.

Step 1-4: pickling step

On the surface of the wheel for automobiles that have finished the degreasing process of 1-2 above, additive metals, oxide films, iron powder, etc., used to improve strength and other performance during the casting process are exposed on the surface of the wheel. This is a process that activates the surface of the dragon wheel to better produce a film. At this time, the acidity is preferably maintained at pt 18 ~ 36.

The pickling process is to completely remove the oxide film and iron on the wheel surface by using dilute sulfuric acid, and maintaining the acidity as described above does not completely remove the oxide film and iron on the wheel surface when the acidity is too low. If it is too high, the sulfuric acid component may not be completely removed in the next step, the water washing step.

Process 1-5: 2nd washing process

In the same process as the first water washing process of the above process 1-3, it is a process of performing an etching reaction on the surface of a wheel for a vehicle to be coated, and washing the remaining pickling liquid and impurities reacted with the pickling liquid.

Process 1-6: coating process

This is a process for improving adhesion and required physical properties by reacting a Zr film component, etc., on the surface of a vehicle wheel made in a state of good reaction through the above steps 1-5.

Process 1-7: pure water washing process

This is a process of removing by-products and unreacted coating liquid generated by the coating solution reaction from the wheel that has passed through the above steps 1-6 with pure water.

In the present invention, a wheel for a vehicle in a state in which oil and contaminants have been removed by the pretreatment process (Step 1) of Steps 1-1 to 1-7 is painted.

[Step 2: Drying step]

This is to completely dry the surface of the vehicle wheel, which is the object to be coated, which has passed through the step 1, and is completely dried with hot air at 120 to 180°C in a drying furnace. At this time, the drying time is determined by the surface condition of the wheel.

[Step 3: Primer powder coating]

After the step 2, an acrylic type primer (powder powder) is applied to the wheel.

In this process, an acrylic-type primer (powder powder) is applied to the automobile wheel as a base using an electrostatic painting gun. After the primer is applied, the primer is melted through an oven process in a drying furnace in step 4 below. Base coating on.

Such primer powder coating is a process performed in order to protect the vehicle wheel and improve adhesion to the intermediate color during the intermediate color coating performed in step 5, and to improve the overall coating properties.

[Step 4: oven process]

This is a step performed in a drying furnace after the primer powder coating according to step 3 above.

In this case, the drying temperature and time are typically made at 220° C. for about 30 minutes, and the thickness of the coating film after drying is preferably 60 to 100 μm. By doing as described above, the adhesion to the intermediate color is improved during the intermediate color coating in step 5 below.

[Step 5: intermediate color painting process]

After Step 4, as a process of substantially applying a color to the surface of a vehicle wheel, it is applied using a liquid coating color of various colors.

[Step 6: Drying step]

This is a process for naturally expressing the color after the color is applied to the surface of the vehicle wheel according to the step 5 above.

This drying process may vary depending on the intermediate color coating solution, but is generally naturally dried for about 10 minutes, and the thickness of the intermediate color coating film after drying is preferably 10 to 20 μm.

[Step 7: Pearl coating process]

As one of the characteristic configurations of the present invention, a color is applied to the surface of the wheel by step 5, and pearl is coated after the color coating film is dried by step 6.

Such a pearl coating process can be divided into a method of sequentially coating pearl particles and top coat liquid transparent clear (Example 1), and a method of mixing and painting pearl particles and top coat liquid clear clear (Example 2).

In addition, the size of the pearl particles in the present invention is, since the pearl particles usually have a flat shape, those not exceeding 100 μm based on the longest length of the plane occupy at least 1/2 or more of the total. Preferably, those within the range of 50 to 100 μm should occupy at least 1/2.

(Example 1)

Hereinafter, a pearl coating process (process 7) of sequentially coating pearl particles and top coat liquid transparent clear will be described with reference to FIGS. 3 and 6.

(Step 7-1: Pearl particle coating process)

The said pearl particle coating process (process 7-1) applies only pearl. At this time, the pearl particles are applied using a special gun for applying pearl particles.

Conventionally, a method of putting pearls together during medium color coating has been used, but when such a coating is performed, pearl particles are buried in the medium color paint so that all the functions of pearl cannot be exhibited. The present invention is intended to solve the problems of the prior art, by applying pearl after intermediate color painting, it is possible to implement the effect of maximizing the particle feeling of the pearl particles.

At this time, the size of the pearl particles, those that do not exceed 100 μm based on the longest length of the plane, occupy at least half of the total, and preferably, those that are in the range of 50 to 100 μm are at least 1/ It should occupy 2 or more.

(Step 7-2: Top coat liquid transparent clear coating process)

Next, the top coat liquid transparent clear coating process (process 7-2) is performed. It is made after the pearl particles are applied in step 7-1, to prevent the separation of the pearl particles, and to increase the sparkle effect according to the pearl particles.

Conventionally, the top coat liquid transparent clear was applied immediately after the medium color coating containing the pearl particles, but in the present invention, the three-dimensional effect of the pearl particles is intact by coating the top coat liquid transparent clear in a state where only pearl particles are applied after the medium color coating. It can be expressed by maximizing transparency while showing.

(Step 7-4: oven process)

In addition, after the steps of Steps 7-1 and 7-2, the present invention is completed through a separate oven step (Step 7-4).

In the oven process of step 7-4, in a drying furnace, a drying temperature of 160 to 170° C. and a drying time of 30 minutes are performed, and the thickness of the coating film after drying is preferably 20 to 30 μm including the pearl particle layer thickness. By doing this, the brightness and three-dimensional effect of the pearl particles are maximized.

That is, in the conventional case, the pearl particles are mixed with the intermediate color and transparent clear coating is applied to the upper layer, so that the pearl particles are concealed in the intermediate color, thereby reducing the brightness and three-dimensional effect of the pearl particles. By 7, brightness and three-dimensional effect by pearl particles are maximized.

(Example 2)

Below, the pearl coating process (process 7) of mixing and coating pearl particles and the top coat liquid transparent clear will be described with reference to FIGS. 7 and 8.

(Step 7-3: Pearl particle and liquid transparent clear mixed top coat clear painting process)

Step 7-3 is a coating process in which pearl particles and top coat liquid transparent clear are mixed and coated, and the pearl particles and top coat liquid transparent clear are applied together. In this way, by substituting a single step 7-3 for the steps 7-1 and 7-2, the number of steps can be reduced, and the brilliance and graininess of the pearl particles can be sufficiently exhibited.

Yet, compared with the conventional method of putting pearl particles together during medium color painting, the present invention has all the functions of maximizing the particle feeling of pearl particles in that the pearl particles are put together during top coat color painting. Can be implemented.

At this time, the size of the pearl particles, those that do not exceed 100 μm based on the longest length of the plane, occupy at least half of the total, and preferably, those that are in the range of 50 to 100 μm are at least 1/ It should occupy 2 or more.

(Step 7-5: oven process)

In addition, after the step of step 7-3, the present invention is completed through a separate oven step (step 7-5).

In the oven process of Step 7-5, a drying temperature of 160 to 170° C. and a drying time of 30 minutes are performed in a drying furnace, and after drying, the thickness of the coating layer including pearl particles is preferably 15 to 25 μm. By doing in this way, the brightness and three-dimensional effect of the pearl are maximized.

That is, in the conventional case, the pearl particles are mixed with the intermediate color and transparent clear coating is applied to the upper layer, so that the pearl particles are concealed in the intermediate color, thereby reducing the brightness and three-dimensional effect of the pearl particles. 7 maximizes the brightness and three-dimensional effect of pearls.

The configuration of a vehicle wheel made by the above painting method is made as follows.

First, the present invention has a primary powder coating layer having a thickness of 60 ~ 100㎛ on the surface of a vehicle wheel, secondly has an intermediate color coating layer painted in various colors having a thickness of 10 ~ 20㎛, 3 A car wheel having a pearl coating layer in a lane, a top coat liquid transparent clear coating layer, and the total thickness of the pearl coating layer and the top coat liquid transparent clear layer is 20 to 30 μm (the present invention according to Example 1 ) Is made.

Second, the present invention has a primary powder coating layer having a thickness of 60 ~ 100㎛ on the surface of a vehicle wheel, secondly has an intermediate color coating layer coated in various colors having a thickness of 10 ~ 20㎛, 3 An automobile wheel (the present invention according to Example 2) having a pearl having a thickness of 15 to 25 μm by car and a transparent clear coating layer of the top coat liquid is made.

In the following, the excellence of the present invention will be described by comparing the present invention according to Examples 1 and 2 with the comparative invention.

The present invention according to Example 1 and Example 2 each satisfies the above conditions, and the comparative example invention has a primer powder coating layer having a thickness of 60 to 100 μm on the surface of a vehicle wheel, and secondly It had a pearl particle having a thickness of 20 to 30 µm and an intermediate color coating layer, and three times, a vehicle wheel having a top coat liquid transparent clear coating layer of 15 to 25 µm was obtained.

The experimental conditions were divided into two conditions, and the first experimental condition was: ① The size of the pearl particles was 10~20㎛ (the size of more than half of the total), ② The clear and the pearl were 8:2 (Comparative Example Invention Since there is no clear, it is used as a medium color solution instead of clearing), ③ oven temperature (150°C), and ④ oven time (30 minutes) (above ③ and ④ are Step 7 in the present invention according to Examples 1 and 2) It is the temperature at -4 and 7-5, and in the comparative example invention, it means the temperature in the oven process after intermediate color coating).

In addition, the second experimental conditions are: ① The size of the pearl particles is 50-100㎛ (the size of more than half of the total), ② The clear and the pearl are 9:1 (there is no clear in the comparative example invention, so it is moderate instead of clearing). Color liquid), ③ oven temperature (170° C.), and ④ oven time (40 minutes) (above ③ and ④ are temperatures in steps 7-4 and 7-5 in the present invention according to Examples 1 and 2) And in the comparative example invention, it means the temperature in the oven process after intermediate color coating).

As shown in Fig. 9, it can be seen that in both the first and second experimental conditions, the invention of Example 1 has a more beautiful sparkle appearance than the invention of the comparative example, and the invention of Example 2 is more than the invention of Example 1. It can be seen that it has a more beautiful sparkle appearance.

In addition, it can be seen that the inventions in the second experimental condition rather than the first experimental condition have a beautiful sparkle appearance.

According to the above results, as in the second experimental condition, by increasing the pearl particles to 50 to 100 μm (more than 1/2 of the total) and setting the ratio of clear and pearl particles to 9:1, the brightness of the finished product It can be seen that the degree is improved.

In addition, despite the use of fewer pearl particles, by increasing the size of the pearl, it has a beautiful sparkle appearance and prevents color discoloration in the middle, and by increasing the oven temperature and increasing the oven time, paint adhesion It could be seen that this is improving.

The above description has been described by way of example of the present invention, and the embodiments described in the specification and drawings are not intended to limit the technical spirit of the present invention, but to explain it, so those of ordinary skill in the technical field to which the present invention pertains Various modifications and variations may be made without departing from the above technical idea of the present invention. Therefore, the scope of protection of the present invention should be interpreted as being interpreted by the matters described in the claims, and that technical matters within the scope equivalent thereto are also included.

1000: Wheel (material state)
2000: primer powder coating layer
3000: intermediate color coating layer
1003: Pearl and medium color coating layer
4000: pearl coating layer
5000: Top coat clear paint layer
6000: Pearl and top coat liquid transparent clear coating layer

Claims (13)

In the pearl clear coating method of a car wheel to make the appearance beautiful by expressing the pearl particles to the outside while securing the pearl adhesion to the car wheel,
A pretreatment step (step 1) of removing contaminants adhering to automobile wheels and producing an insoluble film;
Drying process of completely drying the automobile wheel with hot air in the drying furnace (Step 2);
The primer powder coating process of applying an acrylic type primer (Step 3);
Oven drying in a drying furnace at 220±20° C. for 30 minutes to melt the primer and base-coat the car wheel (Step 4);
Intermediate color painting process for coloring automobile wheels (Step 5);
Natural drying step of naturally drying for 10 minutes (step 6);
A pearl clear coating method for automobile wheels, characterized by comprising a pearl coating plant (Step 7) that coats pearl. The method of claim 1,
The process 1 comprises a bath washing step, a degreasing step, a first washing step, a pickling step, a second washing step, a film forming step, and a pure water washing step. The method of claim 1,
The hot air temperature in the drying furnace in the step 2 is characterized in that 120 ~ 180 ℃, pearl clear coating method of a vehicle wheel. The method of claim 1,
Pearl clear coating method for a vehicle wheel, characterized in that the thickness of the coating film after drying of the base powder coating that has gone through the oven drying process of step 4 is 60 to 100 μm. The method of claim 1,
The step 5 is a pearl clear coating method for a vehicle wheel, characterized in that the liquid coating color is used to represent the color of the vehicle wheel. The method of claim 1,
Pearl clear coating method of a vehicle wheel, characterized in that the coating film thickness of the intermediate color after the drying process according to the step 6 is 10 ~ 20㎛. The method of claim 1,
The step 7 is, after the pearl particles are applied, the top coat liquid transparent clear coating, characterized in that the pearl clear coating method of a vehicle wheel The method of claim 1,
The step 7 is a pearl clear coating method of a vehicle wheel, characterized in that the coating is performed by mixing pearl particles and liquid transparent transparent clear. The method of claim 7,
The pearl particle application of the step 7 is to apply only the pearl particles using a pearl particle application gun (step 7-1),
The top coat liquid transparent clear coating of the above 7 is to apply the top coat liquid clear clear after the pearl particles are applied (step 7-2),
After the pearl coating (process 7-1) and the top coat liquid transparent clear coating (process 7-2), an oven process (process 7-4) is performed, and the oven process (process 7-4) is performed in a drying furnace, at a drying temperature. 160 ~ 170 ℃, passing through a drying time of 30 minutes, characterized in that the thickness of the coating film after drying to 20 ~ 30㎛ including the thickness of the pearl particle layer, pearl clear painting method of a vehicle wheel. The method of claim 8,
The pearl particles and liquid transparent clear mixed coating in the above step 7 is to coat the pearl particles and liquid clear mixed at a time (step 7-3),
After the pearl particles and liquid transparent clear mixed coating (process 7-3), an oven process (process 7-5) is performed, and the oven process (process 7-5) is performed in a drying furnace, a drying temperature of 160 to 170°C, drying It passes through a time of 30 minutes, characterized in that the thickness of the coating film after drying to be 15 ~ 25㎛, pearl clear coating method of a car wheel. In the automobile wheel coated with pearl clear made by the pearl clear coating method of the automobile wheel according to any one of claims 1 to 10,
Firstly, it has a primer powder coating layer having a thickness of 60-100㎛ on the surface of the vehicle wheel,
Secondly, it has an intermediate color coating layer that is painted in various colors with a thickness of 10-20㎛,
Thirdly, it has a pearl particle coating layer,
Fourth, a top coat liquid transparent clear coating layer, wherein the pearl particle coating layer and the top coat liquid transparent clear layer have a total thickness of 20 to 30 μm. In the automobile wheel coated with pearl clear made by the pearl clear coating method of the automobile wheel according to any one of claims 1 to 10,
Firstly, it has a primer powder coating layer having a thickness of 60-100㎛ on the surface of an automobile wheel,
Secondly, it has an intermediate color coating layer that is painted in various colors with a thickness of 10-20㎛,
A car wheel coated with pearl clear, characterized in that consisting of a pearl having a thickness of 15 to 25 μm and a top coat liquid transparent clear coating layer. The method of claim 9 or 10,
The size of the pearl particles is 50 ~ 100㎛,
The top coat liquid transparent clear and pearl particles are mixed in a ratio of 9:1, wherein the pearl clear coating method of a vehicle wheel.

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