KR20140126567A - Method for plating metallic material - Google Patents

Method for plating metallic material Download PDF

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Publication number
KR20140126567A
KR20140126567A KR20130044901A KR20130044901A KR20140126567A KR 20140126567 A KR20140126567 A KR 20140126567A KR 20130044901 A KR20130044901 A KR 20130044901A KR 20130044901 A KR20130044901 A KR 20130044901A KR 20140126567 A KR20140126567 A KR 20140126567A
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South Korea
Prior art keywords
coating
workpiece
vacuum
coating step
present
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KR20130044901A
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Korean (ko)
Inventor
이준규
박경환
Original Assignee
주식회사 코람에스티
이준규
박경환
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Priority to KR20130044901A priority Critical patent/KR20140126567A/en
Publication of KR20140126567A publication Critical patent/KR20140126567A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
    • B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B05D7/57—Three layers or more the last layer being a clear coat
    • B05D7/576—Three layers or more the last layer being a clear coat each layer being cured, at least partially, separately
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/34—Sputtering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2504/00—Epoxy polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2508/00—Polyesters

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Inorganic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The present invention relates to a method of manufacturing a metal film, which comprises a preparation step of continuously supplying a metallic material to a coating line by a belt conveyor, a pretreatment step of removing impurities on the surface of the workpiece and disposed after the preparation step, A vapor deposition step of applying a material by an electrostatic method using a butadiene-based transparent fluid resin coating and disposed after the undercoating step and a lower coating step of applying a surface of the material by a charging method using a powdery resin paint, A vacuum deposition step of forming a thin film on a surface of a workpiece by a sputtering process in a vacuum chamber and a vacuum deposition step arranged after the undercoating step, A top coating step of applying a top coating and a top coating step after the top coating step, The present invention relates to a method of coating a metallic material including a hard coating step of coating a material with a coating agent or a crystal-based coating agent. According to the present invention, a pretreatment process is applied instead of polishing or cutting a metal material such as an aluminum wheel, Minimizes surface defects such as scratches, and achieves abrasion resistance and high gloss aesthetics that correspond to the conventional chrome coating process, as well as achieving economical efficiency and quality excellence by reducing manufacturing costs through eco-friendly processes. An effect that can be expected can be expected.

Description

TECHNICAL FIELD The present invention relates to a method for coating a metallic material,

TECHNICAL FIELD The present invention relates to a coating method for a metal-based material, and more particularly to a coating method for improving abrasion resistance and high-gloss aesthetics of a metal material such as an aluminum wheel.

A surface treatment process is mainly used in order to make the appearance of a metallic material such as an aluminum wheel for a vehicle more beautiful and to improve the abrasion resistance of the surface. Conventional surface treatment processes include a simple coating method using a metal material and a coating method using a plating method.

The simple painting method using the paint is to paint the surface of the metal material with the paint simply by using a brush or the like, and it is possible to perform the surface treatment at a relatively low cost, but the surface is not smooth and the adhesion with the metal surface is excellent It can not easily be peeled off due to impact or scratches, and there is a disadvantage that the appearance is not beautiful and wear resistance is poor. Therefore, it is difficult to adapt to the high-end vehicles exported to the world as it is now.

In contrast, since the plating process is performed through the plating process through the plating process, it is possible to produce a product having excellent gloss and various colors such as white, silver, and wine colors, which are common in the market. In addition, the surface of products such as vehicles subjected to such a plating process is also excellent in abrasion resistance.

However, in order to plate the surface of such a gold-based material, it is subjected to a process for removing foreign matters or for surface planarization. In the past, the surface of the gold-based material has sometimes been poorly processed by polishing or cutting.

In addition, chromium, which is mainly ornamental and has excellent abrasion resistance, is widely used in the plating process. Recently, the interest in the environment has been increased, and in particular, the import restrictions on chromium plating products have been strengthened in certain countries as international environment regulations are strengthened.

Accordingly, there is a need for another plating process which can ensure the aesthetics of appearance of a metal-based material such as an aluminum wheel corresponding to chromium plating, maintain wear resistance, and meet international environmental regulations.

The present invention has been proposed in order to overcome the above-mentioned problems of the prior art. The present invention reduces surface treatment cost by applying a pretreatment process instead of grinding or cutting a metal material such as an aluminum wheel and minimizes surface defects such as scratches during coating In addition, the present invention provides a painting method that can attain abrasion resistance, high-gloss aesthetics and the like corresponding to the conventional chrome coating process, as well as to reduce manufacturing cost through an environmentally friendly process to improve economy and at the same time to ensure quality excellence I have to.

In order to achieve the above object, an embodiment of the present invention provides a method of coating a metal material as described below.

In an embodiment of the present invention, there is provided a method of manufacturing a semiconductor device, comprising: a preparation step of continuously supplying a metal material to a coating line by a belt conveyor; a pretreatment step of removing impurities on a surface of the workpiece, A step of coating a surface of a material by a triabo method using an epoxy polyester powder resin coating, and a step of applying a material by a corona method using a butadiene-based transparent fluid resin coating, A vacuum deposition step of forming a thin film on the surface of the workpiece by a sputtering process in a vacuum chamber and a vacuum deposition step after the vacuum deposition step, A top coating step of applying a surface of a material in a manner of a top coating step And may include a hard coating step in which the material is coated with a ceramic-based coating agent or a crystal-based coating agent.

In one embodiment, the undercoating step may be configured such that an epoxy polyester powder resin coating is applied to the surface of the material at a thickness of 40 to 60 mu m.

In one embodiment, the undercoating step may be configured to be applied with an epoxy polyester powder resin paint by a corona type spray gun when the material is rotated in the forward-reverse-forward direction by the rotating device .

In one embodiment, the undercoating step may be configured to cure the surface smoothness of the material uniformly for 20 to 40 minutes in a drying furnace at 220 ± 5 ° C.

In one embodiment, the vapor deposition coating step may be configured such that a butadiene-based transparent fluid resin coating is applied to the surface of the material at 20 to 30 μm.

In one embodiment, the vapor deposition coating step is configured to be coated with a butadiene-based transparent fluid resin coating by a corona spray gun-type coating robot when the material is rotated in the order of forward-reverse-forward direction by the rotating device .

In one embodiment, the vapor deposition coating step is performed in a clean air space having a clean class of class 10 to class 5000 for uniformity of surface smoothness of the material for 10 to 20 minutes, To < RTI ID = 0.0 > 60 minutes. ≪ / RTI >

In one embodiment, the vacuum deposition step may be configured to subject the workpiece to a sputtering process at a vacuum of 10 -8 to 10 -6 torr.

In one embodiment, the vacuum deposition step may be configured to form irregularities on the surface of the workpiece by plasma treatment at a degree of vacuum of 10 -5 to 10 -2 torr so as to improve the surface deposition power of the workpiece before the sputtering process.

In one embodiment, the vacuum deposition step may be configured to rotate the workpiece inside the vacuum chamber so that a thin film is formed on the entire portion of the workpiece.

In one embodiment, the top coating step may be configured so that an acrylic-based transparent powder resin coating is applied to the surface of the material at 40 to 60 μm.

In one embodiment, the top coating step may be configured to be coated with an acrylic transparent powder resin coating material by a corona type spray gun when the material is rotated in the forward-reverse-forward direction by the rotating device.

In one embodiment, the top coating step may be configured to cure the surface smoothness of the material uniformly for 20 to 40 minutes in a drying furnace at 220 +/- 5 DEG C, for uniformity.

In one embodiment, the hard coating step may be configured such that a ceramic coating agent or a crystal coating agent is coated to a thickness of 5 to 15 占 퐉.

In one embodiment, the hard coating step may be configured to cure the material in a drying oven at 40 +/- 5 DEG C for 10 to 20 minutes.

In one embodiment, the pretreatment step may be performed at a temperature of about < RTI ID = 0.0 > 0 C < / RTI > The second pure mist, and the drying process.

In one embodiment, the pretreatment step may be configured to treat the degreasing process or the coating process with a spray process.

In one embodiment, in the pretreatment step, the swelling process, the water washing process, or the neutralization process is performed by a dipping process, and the vortex is induced in the bath liquid, the wash liquid or the neutralizing liquid so as to improve the swelling, .

In one embodiment of the present invention, a surface treatment cost can be reduced by applying a pretreatment process instead of polishing or cutting a metal material such as an aluminum wheel, and surface defects such as scratches, Can be minimized.

As the surface of the metal material is processed through the steps of pretreatment, undercoating, vapor deposition, vacuum deposition, and top coating, it is possible to obtain abrasion resistance and high gloss aesthetics corresponding to the conventional chromium coating process. After the top coating step, a hardness coating step is added to improve the hardness of the coating, which can also help increase the overall surface hardness of the finished product such as an actual automobile.

Further, by improving the deposition power of the coating material through the sputtering treatment, a coated product having excellent corrosion resistance, abrasion resistance and the like can be produced. This can provide additional help in ensuring a uniform overall coating on the surface of the coated article.

By forming the unevenness by the plasma treatment in advance, the deposition rate of the material surface can be improved. Of course, the material can be rotated during the vacuum deposition process to induce uniform deposition of the material surface.

In addition, it is possible to produce environmentally friendly products by applying plating method in place of chromium plating in response to international recognition and environmental regulation of environmental protection, and at the same time, quality of painting can be expected to be maintained.

1 is an overall process diagram of an embodiment of a method of coating a metallic material according to the present invention.
FIG. 2 is a detailed process diagram of the preprocessing step in the invention shown in FIG. 1; FIG.
FIG. 3 is a detailed process diagram for the lower coating step in the invention shown in FIG. 1. FIG.
FIG. 4 is a detailed process diagram of the vapor deposition coating step in the invention shown in FIG. 1. FIG.
5 is a detailed process diagram for the vacuum deposition step in the invention shown in FIG.
6 is a detailed process diagram of the top coating step in the invention shown in FIG.

In order to facilitate understanding of the features of the present invention as described above, a method of coating a metallic material according to an embodiment of the present invention will be described in detail.

In order to facilitate understanding of the embodiments described below, in the reference numerals shown in the accompanying drawings, the related components among the components that perform the same function in the respective embodiments are denoted by the same or an extension line number.

Embodiments related to the present invention basically apply a pretreatment process instead of grinding or cutting to a metal material such as an aluminum wheel to reduce surface treatment costs and minimize surface defects such as scratches and the like, Abrasion resistance, high gloss and aesthetics, as well as being able to reduce manufacturing costs through eco-friendly processes to improve economy and at the same time ensure quality excellence.

Hereinafter, a specific embodiment of the present invention will be described with reference to the accompanying drawings.

1 is an overall process diagram of an embodiment of a method of coating a metallic material according to the present invention. FIG. 2 is a detailed process diagram for the pretreatment step in the invention shown in FIG. 1, FIG. 3 is a detailed process diagram for the undercoating step in the invention shown in FIG. 1, FIG. 5A and FIG. 5B are detailed process diagrams for the vacuum deposition process in the invention shown in FIG. 1, and FIG. 6 is a detailed process diagram for the top coating process in the invention shown in FIG.

1 to 6, an embodiment of a coating method of a metal material according to the present invention includes a preparing step S1 for continuously supplying a metal material to a coating line by a belt conveyor, (S2) for removing foreign matter on the surface of the workpiece, and a priming step S3 (S3) for applying a surface of the workpiece by electrification using an epoxy polyester powdery resin paint, which is disposed after the pre- (S4) for applying a material by an electrostatic method using a butadiene-based transparent fluid resin paint and after the vapor deposition coating step (S4), which are disposed after the undercoating step (S3) A vacuum deposition step S5 of forming a thin film on the surface of the workpiece by a sputtering process in the vacuum chamber 51 and a vacuum deposition step S5 after the vacuum deposition step S5, And a hard coating step (S7) for coating the material with a ceramic-based coating agent or a crystal-based coating agent, which is disposed after the upper coating step (S6) and after the upper coating step (S6) Lt; / RTI >

The roller conveyor system disclosed in Patent Registration No. 10-1214927 can be applied to the lower coating step, the vapor deposition coating step, and the upper coating step, which are implemented by one embodiment of the present invention, Can be linked. Reference numeral A in Figs. 3 to 6 denotes a metal-based material, and reference numeral B denotes a roller conveyor system disclosed in the above-mentioned Patent Registration No. 10-1214927. Omit it.

In the following, we will look at the details of each step.

[Preparation phase]

The preparation step S1 of an embodiment according to the present invention may be a waiting step for entering a pretreatment step S2 in which a metallic material such as an aluminum wheel for a vehicle is cleaned of surface foreign substances to perform a vacuum deposition process.

In this preparation step (S1), in order to more effectively perform foreign object washing in the pretreatment process as well as to simply wait for entry, and to improve the adhesion of the paint, shot balls, short grit shot grit, and the like.

[Pretreatment Step]

The pretreatment step S2 of the embodiment of the present invention is a step of removing surface foreign matter of the material introduced in the preparation step S1, and specifically includes balsa, preliminary degreasing, main degreasing, , The third and fourth washings, the pure water, the first pure mist, the coat, the fifth wash, the pure wash, the second pure mist, and the drying process.

In one embodiment of the present invention, the degreasing process or the coating process may be performed by a spray process, and the boiling process, the water washing process, or the neutralization process may be performed by a deposition process. This deposition process can be configured to induce eddies in the bath liquid, wash liquor or neutralized liquid to improve the boiling, washing or neutralization efficiency during deposition.

Hereinafter, each detailed process of the pre-processing step S2 will be described with reference to FIG. 2,

1) Bathing process (S201)

The hot water process is a process in which a material is immersed in hot water having a constant temperature for a predetermined time in order to remove contaminants such as foreign matter and oil on the surface of the material. In an embodiment of the present invention, the hot water washing step may be a step of immersing the material introduced in the preparation step (S1) for 24 to 28 seconds in hot water at 60 ± 5 ° C.

2) Preliminary degreasing process (S202)

The preliminary degreasing process is a process of spraying the hot water added with the surfactant at a predetermined concentration or depositing the material in the hot water in order to improve the efficiency of the present degreasing process in preparation for the present degreasing process.

That is, the preliminary degreasing process can be performed by a spray process, a dipping process, or the like, and a spray process may be applied in an embodiment of the present invention. However, the present invention is not limited thereto.

Specifically, in the preliminary degreasing process according to an embodiment of the present invention, hot water at 55 ± 5 ° C containing surfactant at a concentration of 4 to 6% is sprayed onto a material at an injection pressure of 0.8 to 1.2 kg / cm 2 for 50 to 54 seconds And removing the contaminants on the surface of the workpiece.

3) In the main degreasing process (S203)

The degreasing process is a process of spraying the hot water added with a certain concentration of the surfactant to the material or depositing the material in hot water as in the preliminary degreasing process to completely remove contaminants on the surface of the material.

That is, the degreasing process can be performed by a spray process, a dipping process, or the like, and a spray process may be applied in an embodiment of the present invention. However, the present invention is not limited thereto.

In detail, in the present degreasing process according to an embodiment of the present invention, hot water at 55 ± 5 ° C containing surfactant at a concentration of 4 to 6% is injected again to the material for 50 to 54 seconds at an injection pressure of 0.8 to 1.2 kg / cm 2 Lt; / RTI > This is to perform the same process as the preliminary degreasing process again to remove the contaminants on the surface of the material again.

4) First water washing step (S204)

In the temporary example according to the present invention, the first water washing step may be a step of immersing and washing the material for 24 to 28 seconds at a conductivity of 600 mu s / cm or less .

5) Second Washing Step (S205)

The second water washing step is for completely removing the surface active agent on the surface of the workpiece after the first water washing step. In the temporary example according to the present invention, the first water washing step is a step of applying a material for 24 to 28 seconds at a conductivity of 300 s / Followed by immersion washing.

6) neutralization step (S206)

In the embodiment of the present invention, the neutralization process is a process in which an etching solution of sulfuric acid in warm water at 35 5 C is treated with an acidity of 1.5 to 2% And immersing it in the material for 50 to 54 seconds to neutralize it.

However, the present invention is not necessarily limited to this, and may be realized by a spray method under the same conditions.

4) Third washing process (S207)

The third washing step is for removing the etching solution on the surface of the workpiece. In one embodiment of the present invention, the third washing step may be a step of washing the workpiece by immersing the workpiece for 24 to 28 seconds at a conductivity of 400 s / cm or less.

5) Fourth washing process (S208)

The fourth water washing step is for removing the etching solution on the surface of the workpiece. In one embodiment of the present invention, the fourth water washing step may be a step of immersing the workpiece for 24 to 28 seconds at a conductivity of 100 s / cm or less.

9) The pure water washing process (S209)

The pure water process is a process for finally removing the etchant on the surface of the material. In one embodiment of the present invention, the pure water process may be a step of washing the material by immersing the material for 24 to 28 seconds at a conductivity of 15 μs / cm or less.

10) First pure water mist process (S210)

In one embodiment of the present invention, the first pure mist process is performed to remove foreign substances remaining on the surface of the material, which occurs during the process in preparation of the coating process. In the first pure mist process, And exposing the material to mist flowing at a flow rate of 4 to 6 L / min for 12 seconds.

11) Coating process (S211)

In one embodiment of the present invention, the non-chrome liquid is heated to 35 ± 5 ° C in a pH range of 3.5 to 4.5 under conditions of a concentration of 3 to 5% And spraying the material at a spray pressure of 0.8 to 1.2 kg / cm for 50 to 54 seconds.

However, it is not necessarily limited to the spraying method, and it may be replaced by the deposition method under the same conditions.

12) The fifth water washing step (S212)

The fifth water washing step is for removing the non-chromium solution on the surface of the material. In one embodiment of the present invention, the step may be a step of dipping the material for 24 to 28 seconds at a conductivity of 100 μs / cm or less.

13) Pure water washing process (S213)

The pure water step of this step is for finally removing the non-chrome liquid on the surface of the material. In one embodiment of the present invention, it may be a step of immersing the material for 24 to 28 seconds at a conductivity of 15 μs / cm or less.

14) The second pure mist process (S214)

The second pure mist process is a step for finally cleaning the surface of the workpiece. In one embodiment of the present invention, the step of exposing the workpiece to mist flowing at a flow rate of 4 to 6 L / min for 8 to 12 seconds at a conductivity of 5 μs / .

15) Drying step (S215)

The drying process is to remove moisture on the surface of the material. In one embodiment of the present invention, the material may be exposed and dried in a closed space of 140 ± 10 ° C for 30 to 40 minutes.

[Lower coating step]

Referring to FIG. 3, in the lower coating step S3 of the embodiment of the present invention, after the preprocessing step S2 is completed, the inflow material is applied to the surface of the material at 40 to 60 占 퐉 by using an epoxy polyester powder coating material Step.

In order to increase the coating efficiency in the undercoating step S3, the material is moved in a forward-reverse-forward direction by the rotation device C in the process of being moved by the roller conveyor system disclosed in the above-mentioned Patent Registration No. 10-1214927 , It can be applied by spray gun R3 of tribo type at an injection pressure of 3 to 5 kg / cm < 2 > as an epoxy polyester powder resin coating.

Here, unlike a corona type spray gun, a tri-ball type spray gun does not use a high voltage generator, but a powdered resin paint rubs against a friction material such as Teflon, which is installed inside the spray gun, Or by using the properties of the material to be painted.

In this case, the three spray guns (R3) of the tribo type are arranged in the process so that the material is continuously sprayed while the material rotates in the forward-reverse-forward direction, thereby enhancing the completeness of the painting. The first spray gun can be placed at the bottom of the material to apply the bottom surface of the material, and the second and third spray guns can be disposed at the top of the material to coat the top and sides of the material.

After the application of the epoxy polyester powder coating material on the surface of the material is completed, the surface of the material is uniformly smoothened in preparation for the next coating step (S4), and the material is dried for 20 to 40 minutes in a drying furnace at 220 ± 5 ° C. It can be cured.

[Painting step of vapor deposition]

As shown in FIG. 4, in the vapor deposition coating step S4 of the embodiment of the present invention, after the bottom coating step S3 is completed, the introduced material is coated on the surface of the material using a butadiene- 30 < RTI ID = 0.0 > um. ≪ / RTI >

The composition of the butadiene-based transparent fluid resin coating used in the vapor deposition coating step S4 is 20 to 30% of butadiene resin, 25 to 35% of xylene (CAS No. 1330-20-7), toluene (CAS No. 108- 5 to 10% of butyl cellosolve, 5 to 10% of butyl cellosolve, 25 to 35% of methyl isobutyl ketone (CAS No. 108-10-1), and the like.

In order to increase the painting efficiency in the vapor deposition coating step S4, the material is transferred by the rotation device C in the forward-reverse-forward-forward direction by the rotation conveying system shown in the above-mentioned Patent Registration No. 10-1214927 , It can be applied with a butadiene-based transparent fluid resin coating at a spray pressure of 3 to 5 kg / cm 2 by a corona type spray gun R4.

Here, the spray gun of the corona type is coated by making the charge of the hand paint - charge and the charge of the material + through the intermediate process of forming the electromagnetic field using the high voltage generator (voltage range of 80 ~ 100kV mainly) It can be one of the things to make.

At this time, the corona spray gun (R4) is mounted on each of the three robots and is disposed in the process so that the material is continuously sprayed while rotating in the forward-reverse-forward direction, thereby enhancing the completeness of the steam coating. The first spray gun mounting robot can be placed at the bottom of the material to apply the bottom surface of the material, and the second and third spray gun mounting robots can be disposed at the top of the material to apply the top and sides of the material, respectively.

When the coating of the butadiene based transparent fluid resin coating material on the surface of the material is completed, the surface smoothness of the material is uniformly prepared in preparation for the next vacuum deposition step (S5), for 10 to 20 minutes in an airspace having cleanliness of class 10 to class 5000 It can be stuck and cured in a drying oven at 230 ± 5 ° C for 40 to 60 minutes.

The criterion of the clean class used in one embodiment of the present invention is a rating based on the number of dust particles in the air existing in the clean room, and means the number of dust particles larger than 0.5 μm in size within 1 ft 3 . For example class1000 is the number of dust particles in a size more than 0.5μm 1ft 3 is a means to present at up to 1000.

[Vacuum deposition step]

Referring to FIG. 5, the vacuum deposition step S5 of the embodiment of the present invention includes a step of forming a thin film on the surface of the workpiece by sputtering in the vacuum chamber 51 after the vapor deposition coating step S4 is completed Lt; / RTI >

The vacuum chamber 51 used in the vacuum deposition step S5 may be divided into three X, Y, Z spaces in an embodiment of the present invention, and may be a process of plasma-processing the material in the X space , The process of sputtering the material in the Y space, and the Z space may be a process of releasing the vacuum state in order to discharge the material from the inside of the vacuum chamber 51 into the atmosphere.

After the vapor deposition coating step S4 is completed, the introduced material is introduced into the X space of the vacuum chamber 51 by the moving device 57. [ Thereafter, in the vacuum processing unit 58, the X space is formed in a low vacuum state, wherein the low vacuum state can be a vacuum degree in the range of 10 -5 torr to 10 -2 torr.

In the X space, a plasma treatment is performed by the plasma processing device 52 to form concavities and convexities on the surface of the workpiece so as to improve the surface deposition force of the workpiece before the sputtering process. In order to form concavities and convexities on both surfaces of the workpiece, Can be rotated by 180 degrees by the device 56. [

The material subjected to the plasma treatment is introduced into the Y space by the moving device 57, and the Y space is formed by the vacuum processing unit 58 in a high vacuum state. Here, the high vacuum state may be a degree of vacuum ranging from -10 -8 torr to 10 -6 torr.

The material is sputtered in the Y space. In this process, first, an impinging gas such as argon is supplied into the Y space from the collision gas supply unit 59.

When a voltage is supplied to the cathode 53a as a cathode and the anode 53b as a cathode by operating the voltage control unit 53, a glow discharge occurs at the cathode 53a The impinging gas is ionized, and an electromagnetic field is formed between the cathode 53a and the anode 53b inside the Y space.

At this time, the ionized collision gas accelerates toward the cathode 53a and collides with the target material 54. At this time, the kinetic energy of the collision gas is relatively larger than the interatomic bonding energy of the target material 54, Atoms of the target material 54 are protruded, which is blown off and deposited on the workpiece surface, and a thin film is formed on the surface of the workpiece.

The material can be rotated between the vacuum deposition processes inside the Y space by the rotating device 56 so that vacuum deposition can be performed on both sides of the material.

Further, in the case of metallic materials, the higher the temperature, the higher the deposition rate. Thus, in an embodiment of the present invention, a heating device 55 may be further provided, and the material is heated and sputtered The deposition can be better done.

The material that has undergone the vacuum deposition process is now put into the Z space by the moving device 57 and the vacuum state is released by the vacuum processing unit 58 so that the material can be discharged again into the atmosphere in the Z space. This means that the air is supplied to the Z space at the same level as the atmospheric pressure, and then the material is moved by the roller conveyor system disclosed in the above-mentioned Patent Registration No. 10-1214927 in the next step S6.

[Phase painting]

6, the upper surface painting step S6 of the embodiment of the present invention includes applying a material having a thickness of 40 to 60 占 퐉 to the surface of a workpiece using an acrylic transparent resin resin paint after completing the vacuum deposition step S5 Lt; / RTI >

In order to increase the coating efficiency in the top coating step S6, the material is moved in the forward, reverse, and forward directions by the rotating device C in the process of being moved by the roller conveyor system disclosed in the above-mentioned Patent Registration No. 10-1214927 , It can be coated with an acrylic transparent resin resin paint at a spray pressure of 3 to 5 kg / cm 2 by a corona type spray gun R6.

At this time, three corona type spray guns (R6) are arranged in the process so that the material is continuously sprayed while rotating in the forward-reverse-forward direction, and the completion of the painting can be enhanced. The first spray gun can be placed at the bottom of the material to apply the bottom surface of the material, and the second and third spray guns can be disposed at the top of the material to coat the top and sides of the material.

Once the application of the acrylic transparent powder resin coating material on the surface of the material is completed, the material can be cured for 20 to 40 minutes in the drying furnace at 220 ± 5 ° C to uniform the surface smoothness of the material in preparation for the hard coating step (S7) have.

[Hardness Coating Step]

The hard coating step S7 is a step for enhancing the surface hardness of the workpiece after the top coating step S6. The surface hardness of the workpiece after the top coating step S6 of the embodiment of the present invention is about 1H , Which is strengthened to about 2 to 3H through the hard coating step S7.

In the hard coating step S7, after the upper coating step S6 is completed, the introduced material may be applied to the surface of the material at 5 to 15 占 퐉 by using a ceramic coating agent or a crystal coating agent.

Once the coating of the ceramic coating agent or the crystal coating agent on the surface of the material is completed, the material can be cured for 20 to 40 minutes in a drying furnace at 220 ± 5 ° C to uniform the surface smoothness of the material for final product production.

The present invention reduces the surface treatment cost by applying a pretreatment process instead of grinding or cutting a metal material such as an aluminum wheel through the above-described structure and process sequence, minimizes surface defects such as scratches during coating process, The abrasion resistance, the high gloss and the like, which correspond to the chrome coating process, can be achieved, and the manufacturing cost can be reduced through the eco-friendly process, thereby improving the economical efficiency and ensuring the quality excellence.

The above items are only specific examples of the coating method of metallic materials.

Therefore, it should be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. do.

S1 ... preparation step S2 ... preprocessing step
S3 ... Undercoat step S4 ... Stencil step
S5 ... Vacuum deposition step S6 ... Top coating step
S7 ... Hardness coating step 51 ... Vacuum chamber
51a, 51b, 51c, 51d ... opening / closing door 52 ... plasma processing device
53 ... Voltage control part 53a ... Cathode
53b ... anode 54 ... target material
55 ... Heating device 56 ... Rotating device
57 ... movement device 57a ... support frame
58 ... vacuum processing unit 59 ... collision gas supply unit

Claims (18)

A preparation step of continuously supplying a metallic material to the coating line by a belt conveyor;
A pretreatment step, which is disposed after the preparation step, for removing foreign matter from the work surface;
A priming step of applying a surface of the material by a tribo method using an epoxy polyester powder resin paint, which is disposed after the pre-processing step;
A vapor deposition coating step of coating the material by a corona method using a butadiene transparent fluid resin coating material after the undercoating step;
A vacuum deposition step of forming a thin film on the surface of the workpiece by sputtering in a vacuum chamber after the vapor deposition coating step;
An upper coating step disposed after the vacuum deposition step and applying a surface of a material by a corona method using an acrylic transparent resin powder coating; And
A hard coating step disposed after the top coating step and coating the material with a ceramic coating agent or a crystal coating agent;
Based coating material.
The method according to claim 1,
Wherein the undercoating step is performed by applying an epoxy polyester powder resin coating on the surface of the material at a thickness of 40 to 60 占 퐉.
3. The method of claim 2,
Wherein the lower coating step is applied with an epoxy polyester powder resin coating material by a tribo spray gun when the material is rotated in the forward-reverse-forward direction by the rotating device. Painting method.
The method of claim 3,
Wherein the undercoating step is performed in a drying furnace at a temperature of 220 占 폚 for 20 to 40 minutes in order to uniformly smooth the surface of the workpiece.
The method according to claim 1,
Wherein the vapor deposition coating step is performed by coating a butadiene transparent fluid resin coating material on the surface of the material at 20 to 30 占 퐉.
6. The method of claim 5,
Wherein the vapor deposition coating step is applied with a butadiene-based transparent fluid resin coating material by a corona spray gun-type coating robot when the material is rotated in a forward-reverse-forward direction by a rotating device. How to paint the material.
The method according to claim 6,
The vapor deposition coating step is to stagnate in a clean air space having a clean class of class 10 to class 5000 for 10 to 20 minutes and to cure for 40 to 60 minutes in a drying furnace at 230 占 5 占Wherein the coating material is applied to the surface of the metal material.
8. The method of claim 1 or 7,
Wherein the vacuum deposition is performed by sputtering the material at a vacuum of 10 -8 to 10 -6 torr.
9. The method of claim 8,
Wherein the vacuum deposition step forms a concavity and convexity on the surface of the workpiece by plasma treatment at a degree of vacuum of 10 < -5 & gt ; to 10 < -2 & gt ; torr so as to improve the surface deposition power of the workpiece before the sputtering process.
10. The method of claim 9,
Wherein the material is rotated inside the vacuum chamber so that a thin film is formed on the entire area of the material.
The method according to claim 1,
Wherein the upper phase coating step is performed by applying an acrylic-based transparent powder resin coating material to the surface of the material at a thickness of 40 to 60 占 퐉.
12. The method of claim 11,
Wherein the top coating step is applied by a corona type spray gun when the material is rotated in the order of forward-reverse-forward direction by the rotating device.
13. The method of claim 12,
Wherein the top coating step comprises curing the surface of the material for 20 to 40 minutes in a drying furnace at 220 占 폚 to uniformize the surface smoothness of the material.
The method according to claim 1 or 13,
Wherein the hard coating step is a coating of a ceramic coating agent or a crystal coating agent in a thickness of 5 to 15 占 퐉.
15. The method of claim 14,
Wherein the hard coating step comprises curing the material in a drying furnace at 40 占 占 폚 for 10 to 20 minutes.
The method according to claim 1,
The pretreatment step may include a step of washing the raw material with water, preliminary degreasing, main degreasing, first and second water washing, neutralization, third and fourth washing, pure water, first pure mist, , And a drying process.
17. The method of claim 16,
Wherein the pre-treating step is a degreasing step or the coating step is a spraying method.
18. The method of claim 17,
Wherein the pretreatment step is carried out by a dipping process, a swelling process, a water washing process, or a neutralization process, wherein a vortex is induced in the bath liquid, the wash liquid or the neutralizing liquid so as to improve the swelling, How to paint the material.


KR20130044901A 2013-04-23 2013-04-23 Method for plating metallic material KR20140126567A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110216051A (en) * 2019-06-20 2019-09-10 深圳市松柏实业发展有限公司 Coating process
KR20210052638A (en) 2019-10-29 2021-05-11 대원강업주식회사 Reinforced Single-Coated Powder Coating Method for Spring
KR102287966B1 (en) * 2021-04-09 2021-08-09 이주열 Painting system for metal products
KR102293917B1 (en) 2021-03-16 2021-08-24 유인호 Object fixing jig for continuous painting line
US11179015B2 (en) 2016-03-31 2021-11-23 Lg Electronics Inc. Cleaner

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11179015B2 (en) 2016-03-31 2021-11-23 Lg Electronics Inc. Cleaner
CN110216051A (en) * 2019-06-20 2019-09-10 深圳市松柏实业发展有限公司 Coating process
KR20210052638A (en) 2019-10-29 2021-05-11 대원강업주식회사 Reinforced Single-Coated Powder Coating Method for Spring
KR102293917B1 (en) 2021-03-16 2021-08-24 유인호 Object fixing jig for continuous painting line
KR102287966B1 (en) * 2021-04-09 2021-08-09 이주열 Painting system for metal products

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