KR100971290B1 - Sputtering wheel manufacturing method with thermosetting paint - Google Patents

Abstract

The present invention relates to an aluminum wheel dry plating method by specifying a general process applied in the existing method and adding the process to excellent surface gloss of aluminum wheels and to excellent corrosion resistance and acid resistance to salt or saline to cope with chrome wheels. It relates to a manufacturing method of sputtering wheels by heat-drying paint that can increase not only manufacturing cost but also environmentally-friendly added value.

The specific solving means regarding the sputtering wheel manufacturing method by the hot-dry paint of this inventor,

"The material preparation step is to shoot the shot ball on the surface of aluminum wheel to remove foreign substances on the surface of aluminum wheel and improve the adhesion of paint, and to remove dirt, oil, etc. from the surface of aluminum wheel. , Pre-treatment step of sequentially processing such as 1st, 2nd washing, neutralization, 3rd, 4th washing, coating, 5th, 6th washing, pure water, water drying, and polyester resin or polyester resin And Epoxy Resin are mixed. The color is gray or black mixed powder paint with 3-6Nm2 / hr of total air volume, 15 ~ 90% of discharge power and 10 ~ 50㎂ of generated current. The powder coating step is applied by corona electrostatic coating and dried at 230 ± 10 ℃ in the drying furnace for 10 minutes, and 80 ~ 170kgf / ㎠, spray width of polyester liquid paint is applied to secure the leveling of aluminum wheel surface. 2.5 ~ 5.0kgf / ㎠, fine The middle coating step is applied by air spray method at 2.0 ~ 3.5kgf / ㎠, and it is applied in the setting room, and the argon (Ar) which is inert gas is put in the vacuum chamber and made of any one of aluminum, titanium, chromium and stainless steel. A sputtering step of applying a negative voltage to the target and electrons emitted from the cathode collide with argon gas to form a thin film on the surface of the aluminum wheel by exchanging momentum with an atom protruding from the surface of the aluminum wheel; After the sputtering step, a top coat step of transparently coating the surface of the aluminum wheel using an acrylic powder or an acrylic liquid paint is used.

The sputtering wheel manufacturing method according to the present invention heat-drying paint configured as described above is excellent in surface glossiness of aluminum wheels and excellent in corrosion resistance, acid resistance, and abrasion resistance to salt or salt water to increase the production cost as well as eco-friendly added value in response to chrome wheels. Can be.

Pretreatment step, undercoat powder coating step, middle coating step, sputtering step, top coat step.

Description

Sputtering wheel manufacturing method with thermosetting paint

The present invention relates to an aluminum wheel dry plating method by specifying a general process applied in the existing method and adding the process to excellent surface gloss of aluminum wheels and to excellent corrosion resistance and acid resistance to salt or saline to cope with chrome wheels. The present invention relates to a method for manufacturing a sputtering wheel by heat-drying paint that can increase manufacturing costs as well as environment-friendly added value.

In general, the wheels that support automobile tires are divided into steel wheels made of iron plate, that is, cast iron wheels and aluminum wheels made of aluminum. Today, most of small and medium-sized and large vehicles use aluminum wheels. The aluminum wheel is not only beautiful in appearance but also light in weight, so it is easy to operate the handle.The high thermal conductivity allows the tire to quickly absorb and release heat generated by friction with the ground while driving, thus protecting the tire from overheating. If it is a punctured blade, it is not easily crushed or broken like cast iron wheels, which greatly contributes to safety.

As described above, aluminum wheels having excellent functional effects are beautifully coated and subjected to surface treatment in order to increase the wear resistance of the surface. As a conventional aluminum wheel surface treatment method,

Firstly, there is a surface treatment method for painting the aluminum wheel surface.

Secondly, a surface treatment method by plating an aluminum wheel surface is performed.

As described above, the aluminum wheel surface treatment method using the coating method using the paint is simple and inexpensive, but the surface is not high-quality, and the adhesion between the painted paint and the aluminum wheel is not good, so It is not easy to peel off and wear resistance, high-grade aluminum wheel surface treatment by painting is not widely adopted.

On the other hand, in the method of surface treatment of aluminum wheels by plating, gloss colors such as gold, silver, and cobalt colors can be obtained on the surface, resulting in a brilliant, high-quality surface gloss. There is an advantage in that an aluminum wheel with abrasion resistance is enhanced such that no scratch is generated.

However, in order to plate the surface of the aluminum wheel, the surface of the aluminum wheel may be polished finely to remove the roughness of the surface of the aluminum wheel before plating.

Aluminum is a material with low hardness and elasticity due to its material, so it takes a lot of time to smoothly polish the surface, and only a skilled worker can make it possible. Therefore, most of the cost of the aluminum wheel plating treatment is mainly due to the cost of pretreatment for polishing the surface for plating rather than the cost of the plating itself.

Therefore, it is possible to plate the aluminum wheel at low cost by reducing the cost of surface polishing performed for the plating treatment.

On the other hand, the chromium-plated aluminum wheel chromium-plated aluminum wheel is used in high-end cars using the excellent decoration characteristics of the chromium, such as the chrome-plated aluminum wheel has a wear-resistant and colorful appearance In addition, due to the international environmental regulations, heavy metals in EU automobiles, increased production prices of chromium-plated aluminum wheels, the discharge of malignant heavy metal wastewater, and the increased weight of the wheels themselves put a strain on the suspension, which leads to weaker grip. There is a problem in that the roadholding (road followability) is falling and therefore the quickness and fuel economy of the car are increased.

The present invention is to solve the above problems,

First, the present invention was developed with the focus on reducing the cost of surface polishing performed prior to plating aluminum wheels. Instead of grinding the surface of aluminum wheels through a conventional grinding or cutting process, the surface of aluminum wheels is polished. By coating, the surface of the painted aluminum wheel can be applied as if it is polished and then dry-plated afterwards, thereby reducing the surface treatment cost, which is the previous step for plating, and thus reducing the cost of the aluminum wheel. To ensure that

Next, despite achieving a high gloss technology that shows the wear resistance and the splendor of appearance similar to the existing chromium-plated aluminum wheels, it aims to simultaneously achieve economic and quality excellence by preventing a rise in manufacturing costs.

Next, despite achieving the above object, it is possible to manufacture environmentally friendly aluminum wheel to minimize the environmental harm,

Next, by incorporating and adding existing general processes to manufacture aluminum wheels having excellent surface glossiness of aluminum wheels and excellent corrosion resistance and acid resistance to salt or brine, the present invention seeks to improve the quality of products despite preventing increase in manufacturing cost. There is an object of the invention.

Specific solving means for achieving the object of the present invention as described above,

"The material preparation step is to shoot the shot ball on the surface of aluminum wheel to remove foreign substances on the surface of aluminum wheel and improve the adhesion of paint, and to remove dirt, oil, etc. from the surface of aluminum wheel. , Pre-treatment step of sequentially processing such as 1st, 2nd washing, neutralization, 3rd, 4th washing, coating, 5th, 6th washing, pure water, water drying, and polyester resin or polyester resin And Epoxy Resin are mixed. The color is gray or black mixed powder paint with 3-6Nm2 / hr of total air volume, 15 ~ 90% of discharge power and 10 ~ 50㎂ of generated current. The powder coating step is applied by corona electrostatic coating and dried at 230 ± 10 ℃ in the drying furnace for 10 minutes, and 80 ~ 170kgf / ㎠, spray width of polyester liquid paint is applied to secure the leveling of aluminum wheel surface. 2.5 ~ 5.0kgf / ㎠, fine The middle coating step is applied by air spray method at 2.0 ~ 3.5kgf / ㎠, and it is applied in the setting room, and the argon (Ar) which is inert gas is put in the vacuum chamber and made of any one of aluminum, titanium, chromium and stainless steel. A sputtering step of applying a negative voltage to the target and electrons emitted from the cathode collide with argon gas to form a thin film on the surface of the aluminum wheel by exchanging momentum with an atom protruding from the surface of the aluminum wheel; As a post-sputtering step, a top coating step of transparent coating on the surface of the aluminum wheel using acrylic powder or acrylic liquid paint,

In the material preparation step to shoot a shot ball on the surface of the aluminum wheel to add a finishing process for finishing the surface of the aluminum wheel to improve the powder coating after the shot,

The pretreatment step,

In order to remove contaminants such as foreign substances and oil on the surface of aluminum wheels, the hot water process with a spray pressure of 0.5kgf / cm2 with 55 ± 10 ℃ hot water, activation of the aluminum wheel surface and a small concentration of surfactant Preliminary degreasing process to remove contaminants by spraying 55 ± 10 ℃ hot water at the spray pressure 1.0 ~ 2.0kgf / ㎠ on the surface of aluminum wheel to facilitate the main degreasing process, and 5 ~ 10% of surfactant on hot water Diluted and mixed 55 ± 10 ℃ liquid detergent is sprayed on aluminum wheel surface with spray pressure 1.0 ~ 2.0kgf / ㎠ to completely remove contaminants on aluminum wheel surface and surfactant component on aluminum wheel surface In order to remove the first washing process to clean the spray pressure 1.0 ~ 2.0kgf / ㎠, the conductivity below 500㎲ / ㎝, and to completely remove the surfactant component on the surface of the aluminum wheel spray pressure 1 The surface of the aluminum wheel was cleaned using a second water washing process for washing at .0 to 2.0 kgf / cm 2 and conductivity of 200 kW / cm or less, and an etching solution containing sulfuric acid with a spray pressure of 1.0 to 2.0 kgf / cm 2 and an acidity of 18 to 36%. The etching solution is neutralized to remove the oxide film on the surface of the aluminum wheel by etching and to ensure the stability of the film coating process, and ion exchange water having a spray pressure of 1.0 to 2.0 kgf / cm 2 and a conductivity of 300 kW / cm or less. The third washing step to wash, the fourth washing step to completely remove and wash the etching liquid by using ion exchanged water having a spray pressure of 1.0 to 2.0 kgf / cm 2 and a conductivity of 50 kW / cm or less, and a spray pressure of 1.0 to 2.0 kgf / Coating process to improve corrosion resistance and adhesion by spraying non-chromium solution with 2cm2, acidity 14.5 ~ 10.5, pH 3.5 ~ 4.5 and forming film on the surface of aluminum wheel, spray pressure 1.0 ~ 2.0kgf / ㎠, conductivity 100㎲ / Non-chromium liquid, the remaining coating liquid, is washed with ion-exchanged water of less than Is a fifth washing process, a sixth washing process for completely removing and washing the non-chromium liquid, which is a remaining coating liquid, by using ion exchange water having a spray pressure of 1.0 to 2.0 kgf / cm 2 and a conductivity of 40 kV / cm or less, and spraying Pure washing process to clean the surface of aluminum wheels with ion exchanged water with pressure 1.0 ~ 2.0kgf / ㎠ and purity (resistance) 0.5 비 / ㎝ or more and completely remove moisture remaining on aluminum wheels under the temperature of 140 ± 10 ℃. Consisting of a hand drying process to remove,

When using acrylic powder in the top coat step,

The acrylic powder is coated with a corona electrostatic coating at an air pressure of 4.0 to 5.0 kgf / ㎠, discharge output (Power output) 35 to 70%, constant power 35 to 60 kv, output current (Output current) 30 to 60 Hz, and the drying temperature in the drying furnace. Drying at 230 ± 10 ° C.,

When using acrylic liquid paint in the top coat phase,

Discharge amount 150 ~ 300kgf / ㎠, injection width 3.0 ~ 6.0kgf / ㎠, atomization 2.0 ~ 3.5kgf / ㎠, electrostatic painting method using air electrostatic coating method mixed with 70 ± 10kv and 190 ± 10 ℃ in drying furnace The above object can be attained by making it dry for 10 minutes. "

Sputtering wheel manufacturing method according to the present invention hot-drying paint configured as described above is excellent in the surface glossiness of aluminum wheels and excellent corrosion resistance, salt and salt resistance to salt or salt water, even if the surface of the aluminum wheels to respond to the chrome wheels In addition to manufacturing costs, eco-friendly added value can be increased.

In the above, the present invention has been described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments, and the present invention is not limited to the above-described embodiments. Various changes and modifications may be made by the user.

Hereinafter, the specific configuration and operation of the sputtering wheel manufacturing method according to the present invention hot-dry paint.
1 is a step diagram showing a manufacturing step of the sputtering wheel manufacturing method by a hot-dry paint of the present invention, Figure 2 is a specific process diagram of the pre-treatment step in the method of manufacturing a sputtering wheel by a hot-drying paint of the present invention.

After casting the aluminum ingot which is a general process by pressing, it is processed into wheel shape,

Referring to the specific method of the present invention,

[Material preparation stage]

As a step to shoot a short ball on the surface of the aluminum wheel in the state of processing the aluminum wheel as described above to remove foreign substances on the surface of the aluminum wheel and to improve the adhesion of the coating,

This step is to remove the various foreign matters on the surface of the machined aluminum wheel by hitting the shot ball to increase the adhesion of the coating made in the following.

Preferably, the shot ball is shot on the surface of the aluminum wheel to improve the powder coating after the shot, and then to the disk type aluminum wheel having a wide surface, a finishing process of finishing the surface of the aluminum wheel is added to further improve the adhesion of the coating. Can be.

[Preprocessing Step]

This step is composed of a plurality of processes, even if the foreign matter adhering to the surface of the aluminum wheel as described above, even if the removal rate is insufficient and thus a step for removing the foreign matter more completely, the reason for going through this step is described below. It is to improve the adhesion of the coating and the smooth, smooth and glossiness of the aluminum wheel surface at the stage of powder coating or top coat.

If you divide the process of this step largely,

Hot water washing process, preliminary degreasing process, main degreasing process, 1st, 2nd washing process, neutralization process, 3rd, 4th washing process, coating process, 5th, 6th washing process, pure washing process, water drying process Proceeds to

Specifically,

The first process is the hot water washing process, which removes contaminants such as foreign substances and oils from the aluminum wheel surface by spraying 55 ± 10 ℃ hot water onto the aluminum wheel surface with a spray pressure of 0.5kgf / ㎠. It is a process to remove foreign substances.

Next, the aluminum wheel that has undergone the hot water washing step is subjected to a preliminary degreasing step,

The preliminary degreasing step is intended to facilitate the main degreasing process described below, since the surface of the aluminum wheel that has undergone the hot water washing step is activated, and a surfactant component having a small concentration is attached thereto.

It refers to a process of removing contaminants by spraying hot water at 55 ± 10 ° C. on an aluminum wheel surface with a spray pressure of 1.0˜2.0 kgf / cm 2.

Next, the aluminum wheel that has undergone the preliminary degreasing step is subjected to the main degreasing step, wherein the degreasing step is carried out with a liquid cleaning agent of 55 ± 10 ° C. in which 5 to 10% of a surfactant is diluted and mixed with hot water, and a spray pressure of 1.0 to 2.0 kgf / cm 2. This refers to a process of completely removing contaminants on the surface of the aluminum wheel by spraying on the surface of the aluminum wheel.

After the degreasing process as described above, oil or other foreign matter on the surface of the aluminum wheel is completely removed.

Next, to completely remove the surfactant component attached to the surface of the aluminum wheel during the main degreasing process,

The condition is to undergo a first washing step of washing at a spray pressure of 1.0 ~ 2.0kgf / ㎠, 500 ㎲ / ㎝ or less.

Next, since the surfactant attached to the surface of the aluminum wheel is not completely removed even after the first washing process, the second washing process is performed to completely remove the surfactant component from the surface of the aluminum wheel.

The condition of the second washing step is to wash at a spray pressure of 1.0 ~ 2.0kgf / ㎠, the conductivity of 200 ㎲ / ㎝ or less.

Next, an oxide film on the surface of the aluminum wheel is etched by etching the surface of the aluminum wheel using an etching solution of a sulfuric acid component having a spray pressure of 1.0 to 2.0 kgf / cm2 and an acidity of 18 to 36% on the surface of the aluminum wheel which has undergone the second washing process as described above. The neutralization process is performed to remove the and to ensure the stability of the coating process.

Next, a third washing process is performed to wash the etching liquid remaining on the surface of the aluminum wheel in the neutralization process.

The third washing step is a step of washing the etching liquid using ion exchange water having a spray pressure of 1.0 to 2.0 kgf / cm 2 and a conductivity of 300 kW / cm or less.

Next, after the third washing step to go through the fourth washing step to more completely remove the etching solution, the conditions of the fourth washing step is ion pressure of 1.0 ~ 2.0kgf / ㎠, 50 ㎲ / ㎝ or less of the injection pressure The fourth washing step is a step of completely removing and washing the etchant using the exchange water.

Next, as described above, the surface of the aluminum wheel is etched and the etching solution is completely removed.

Non-chromium solution is a coating process to improve the corrosion resistance and adhesion by spraying a non-chromium solution with a spray pressure of 1.0 to 2.0 kgf / cm 2, an acidity of 14.5 to 10.5, and a pH of 3.5 to 4.5 to form a film on the surface of an aluminum wheel. The reason for using is to improve the adhesion of the coating.

Next, in order to remove the coating liquid remaining on the surface of the aluminum wheel, that is, non-chromium liquid after completing the coating process as described above,

The fifth washing process is a process of washing the non-chromium liquid, which is the remaining coating liquid, using ion exchange water having a spray pressure of 1.0 to 2.0 kgf / cm 2 and a conductivity of 100 kV / cm or less.

Next, in order to completely remove the non-chromium liquid,

The sixth washing process is performed to completely remove and wash the non-chromium liquid, which is the remaining coating liquid, using ion exchange water having a spray pressure of 1.0 to 2.0 kgf / cm 2 and a conductivity of 40 kW / cm or less.

Next, as a process for finally cleaning the surface of the aluminum wheel after the sixth washing process as described above, the pure washing process,

The condition for this is a pure washing process in which the surface of the aluminum wheel is finally cleaned using ion exchange water having a spray pressure of 1.0 to 2.0 kgf / cm 2 and a purity (specific resistance) of 0.5 kPa / cm or more.

Next, after completing the cleaning of the aluminum wheel as described above to remove the moisture remaining on the surface of the aluminum wheel, in order to perform this role,

The pretreatment step, which is this step, is completed by undergoing a water drying process to completely remove water remaining on the aluminum wheel at a temperature of 140 ± 10 ° C.

[Coated powder coating step]

This step is performed after the pre-treatment step consisting of a plurality of processes, the polyester resin or the polyester resin and the epoxy resin is mixed on the surface of the aluminum wheel, the color is gray or black mixed powder coating air spray pressure (Total Air Volume) 3-6N㎡ / hr, Power Output 15 ~ 90%, Generating Current 10 ~ 50㎂ and applied with corona electrostatic coating, and then drying at 230 ± 10 ℃ in drying furnace for 10 minutes. I speak.

[Middle painting stage]

In this step, the mixed powder paint is coated on the surface of the aluminum wheel through a powder coating step and then dried.

To improve the leveling of the aluminum wheel surface, that is, to achieve smooth, smooth and glossy,

The liquid paint used in this step is a soft polyester-based liquid paint with a spraying amount of 80 ~ 170kgf / ㎠, spraying width 2.5 ~ 5.0kgf / ㎠, atomization 2.0 ~ 3.5kgf / ㎠, by air spray method in the setting room It refers to painting.

[Sputtering Step]

This step is to form a thin film on the surface of the aluminum wheel. Specifically, as the pretreatment step of the sputtering step of this step, an argon (Ar), which is an inert gas, is placed in a vacuum chamber, and any one of aluminum, titanium, chromium and stainless steel is used. A series of electrons emitted from the cathode by applying a negative voltage to a material target ionizes argon gas and collides argon to form a thin film on the aluminum wheel surface by exchanging momentum with atoms protruding from the aluminum wheel surface. The process is called the sputtering step.

[Top Level]

After the sputtering step as described above, the aluminum wheel is finally subjected to the top coat step, so that all the steps are completed.

Transparent coating on the surface of aluminum wheels using acrylic powder or acrylic liquid paint,

Specifically,

In the case of using the acrylic powder in this top coat step,

The acrylic powder is coated with a corona electrostatic coating at an air pressure of 4.0 to 5.0 kgf / ㎠, discharge output (Power output) 35 to 70%, constant power 35 to 60 kv, output current (Output current) 30 to 60 Hz, and the drying temperature in the drying furnace. Ends with drying at 230 ± 10 ° C.,

delete

In the case of using the acrylic liquid paint in this top coat step,

Discharge amount 150 ~ 300kgf / ㎠, injection width 3.0 ~ 6.0kgf / ㎠, atomization 2.0 ~ 3.5kgf / ㎠, electrostatic painting method using air electrostatic coating method mixed with 70 ± 10kv and 190 ± 10 ℃ in drying furnace Drying for 10 minutes to complete all steps and processes to produce a finished aluminum wheel.

The aluminum wheel that has undergone the above-described multi-stage steps and processes has excellent surface gloss, and has excellent corrosion resistance, salt resistance, and acid resistance and abrasion resistance to chrome wheels, thereby increasing manufacturing costs and eco-friendly added value.

1 is a step diagram showing the manufacturing steps of the method for producing a sputtering wheel by the inventors hot-rolled paint,

Figure 2 is a specific process diagram of the pretreatment step in the method for producing a sputtering wheel by the hot-dry paint of the present invention.

Claims (5)

A material preparation step of shooting a short ball on the surface of the aluminum wheel to remove foreign substances on the surface of the aluminum wheel and improving the adhesion of the coating; Hot water, pre-degreasing, main stripping, first and second washing, neutralization, third and fourth washing, coating, fifth and sixth washing, pure water, A pretreatment step of sequentially carrying out a process such as water drying, It is a mixture of polyester resin or polyester resin with epoxy resin. The color of gray or black mixed powder paint is 3-6Nm2 / hr of total air volume, 15 ~ 90% of power output. Undercoat powder coating step of applying 10 ~ 50 mA of generated current with corona electrostatic coating and drying it at 230 ± 10 ℃ for 10 minutes in a drying furnace; In order to secure the leveling of the aluminum wheel surface, the polyester liquid paint is applied by air spraying with a discharge amount of 80 to 170 kgf / ㎠, a spraying width of 2.5 to 5.0 kgf / ㎠, and an atomization of 2.0 to 3.5 kgf / ㎠. The middle painting stage to paint in the room, After argon (Ar), which is an inert gas, is put in a vacuum chamber, a negative voltage is applied to a target made of any one of aluminum, titanium, chromium and stainless steel, and electrons emitted from the cathode are ionized with argon gas and colliding argon. A sputtering step of forming a thin film on the surface of the aluminum wheel by exchanging momentum with the atoms protruding from the surface of the aluminum wheel, The sputtering wheel manufacturing method according to the heat-drying paint, characterized in that consisting of a top coat step of transparent coating on the surface of the aluminum wheel using an acrylic powder or an acrylic liquid paint as a post-sputtering step. The method of claim 1, The method of manufacturing a sputtering wheel by heat-drying paint, characterized in that the addition of a finishing process for finishing the aluminum wheel surface in order to improve the powder coating after the shot by shooting the shot ball on the surface of the aluminum wheel in the material preparation step. The method of claim 1, The pretreatment step, In order to remove contaminants such as foreign substances and oil on the surface of aluminum wheels, a hot water washing process using a hot water of 55 ± 10 ° C. with a spray pressure of 0.5kgf / ㎠, Because of the activation of the aluminum wheel surface and the small amount of surfactant, the degreasing process can be easily carried out by spraying 55 ± 10 ℃ hot water at the spray pressure 1.0 ~ 2.0kgf / ㎠ on the aluminum wheel surface. Preliminary degreasing process to remove, Main degreasing process to completely remove contaminants on aluminum wheel surface by spraying 55 ± 10 ° C liquid detergent at 55 ± 10 ° C with hot water diluted to 10 ~ 10kgf / ㎠ In order to completely remove the surfactant component on the surface of the aluminum wheel, the first washing process for washing at a spray pressure of 1.0 ~ 2.0kgf / ㎠, below 500 ㎲ / ㎝, In order to completely remove the surfactant component on the surface of the aluminum wheel again, the second washing process to wash at a spray pressure of 1.0 ~ 2.0kgf / ㎠, conductivity below 200㎲ / ㎝, Etching the aluminum wheel surface using sulfuric acid etching solution with spray pressure 1.0 ~ 2.0kgf / ㎠ and acidity 18 ~ 36%, neutralization to remove oxide film on aluminum wheel surface and to secure stability Fair, A third washing step of washing the etching liquid using ion exchange water having a spray pressure of 1.0 to 2.0 kgf / cm 2 and a conductivity of 300 kW / cm or less, A fourth washing step of completely removing and washing the etching liquid using ion exchange water having a spray pressure of 1.0 to 2.0 kgf / cm 2 and a conductivity of 50 kV / cm or less; Coating process to improve the corrosion resistance and adhesion by spraying non-chromium liquid with spray pressure 1.0 ~ 2.0kgf / ㎠, acidity 14.5 ~ 10.5, pH 3.5 ~ 4.5 to form a film on the surface of aluminum wheel, A fifth washing step of washing the non-chromium liquid, the remaining coating liquid, using ion-exchanged water having an injection pressure of 1.0 to 2.0 kgf / cm 2 and a conductivity of 100 kV / cm or less; A sixth washing step of completely removing and washing the non-chromium liquid, which is a remaining coating liquid, by using ion exchange water having a spray pressure of 1.0 to 2.0 kgf / cm 2 and a conductivity of 40 kW / cm or less; Pure washing process to finally clean the surface of aluminum wheels using ion exchanged water with injection pressure 1.0 ~ 2.0kgf / ㎠, purity (resistance) 0.5 저항 / ㎝ or more, A method for producing a sputtering wheel by hot-drying paint, characterized by consisting of a water-drying drying process for completely removing water remaining on the aluminum wheel at a temperature of 140 ± 10 ° C. The method of claim 1, When using acrylic powder in the top coat step, The acrylic powder is coated with a corona electrostatic coating at an air pressure of 4.0 to 5.0 kgf / ㎠, discharge output (Power output) 35 to 70%, constant power 35 to 60 kv, output current (Output current) 30 to 60 Hz, and the drying temperature in the drying furnace. A method for producing a sputtering wheel by hot-drying paint, characterized in that drying at 230 ± 10 ℃. The method of claim 1, When using acrylic liquid paint in the top coat phase, Discharge amount 150 ~ 300kgf / ㎠, injection width 3.0 ~ 6.0kgf / ㎠, atomization 2.0 ~ 3.5kgf / ㎠, electrostatic painting method using air electrostatic coating method mixed with 70 ± 10kv and 190 ± 10 ℃ in drying furnace Method for producing a sputtering wheel by heat-drying paint, characterized in that the drying for 10 minutes.

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