KR20180106167A - Method for nano-coating door scuff or door step in vehilce - Google Patents

Abstract

A nano coating method of a door scuff or door step for a vehicle comprises: a step of cleaning a surface of a metal plate which includes a plurality of door scuffs or door steps containing a plurality of patterns with different depths from each other which are formed in an etching process; a step of sorting a clean metal plate; a step of removing a foreign substance which is absorbed at a surface of a metal plate; a step of performing a primer process for applying a primer coating agent; a step of temporarily dehydrating a primer coating agent by using an infrared dehydrator; a step of performing a second dust removing process; a step of performing a coating process for forming a coating layer; a step of temporarily dehydrating a coating layer by using an infrared dehydrator; a step of performing a dehydrating step for entirely dehydrating a coating layer in a hot wind dehydrator; a testing step of identifying a coating layer and judging fair or faulty product; a step of performing a laminating process for attaching a protective film on a coating layer; a step of performing a first punching process for separating a plurality of door scuffs or door steps from a metal plate; and a step of performing a second punching process for forming a guide groove or guide pin.

Description

[0001] METHOD FOR NANO-COATING DOOR SCUFF OR DOOR STEP IN VEHILCE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a door scuff or a door step for a vehicle, and more particularly, to a method for nano-coating a door scuff or door step including a complex and various patterns.

Door Scuff is installed to prevent peeling of paint on the part where friction between driver and passengers can get on and off. It is usually made by attaching plastic or stainless steel material to the door of the vehicle. Door scuffs can be designed to be easily replaced if they are damaged by the soil on the shoes. If there is no door scuff, it is to overcome the drawbacks that a large expense may be required if the vehicle paint is peeled or damaged and the vehicle body needs to be repainted. On the other hand, in the case of sports utility vehicles (SUVs) such as Veracruz or Tucson, where the car body is higher than the passenger car and the feet frequently touch the door scuff portion, the side step portion can be added in addition to the door scuff. The sports utility vehicle (SUV) may have a separate portion for walking because the vehicle body is high. Door steps or site steps can also be designed to be easily replaced if they are damaged.

KR 10-1336417 B1

The present invention relates to a manufacturing method for enhancing the merit of a door scuff or a door step by enhancing the product value by allowing a coating material of a uniform thickness to be formed on various types of patterns included in a door scuff for a vehicle or a door step .

In addition, the present invention can be applied to a door scuff or a door step by applying a nano coating technique to the surface of a door scuff or a door step to prevent the occurrence of scratches or deposition of dirt and to maintain the original state, Method can be provided.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

A method of coating a door scuff or door step according to an embodiment of the present invention includes a step of cleaning a surface of a metal plate including a plurality of door scuffs or door steps including a plurality of patterns having different depths formed through an etching process A step of performing a first inspection of the surface of the metal plate to remove foreign matter adsorbed on the surface of the metal plate, a step of performing a first dust removing process to remove foreign substances adsorbed on the surface of the metal plate, A primer coating process for applying a primer coating solution so that the primer coating solution can be smoothly dried, a primer coating solution applied on the surface is dried by using an IR (infrared) drier to prevent a foreign matter from adhering to the surface, The first step is to remove the foreign matter adsorbed on the surface after the drying process Performing a second dust removing process, performing a coating process to uniformly coat a surface of the primary coating liquid coated with a nano-coating liquid of a ceramic silicon series having hydrophobicity using a roll coater to form a coating layer, Drying the coated layer using an IR drier to prevent foreign matter from being adsorbed on the surface of the coating layer, performing a drying process, applying a door scuff or a door step to the hot air drier, A step of performing drying and curing processes in which the coating layer is completely dried by performing time-hardening to completely dry the coating layer, an inspection step of determining the coating layer on the surface after the drying is completed, A step of performing a laminating process for attaching a metal plate, Performing a pressing process to separate the door scuffs or the door steps, respectively, and performing a punching process to form guide holes or guide pins capable of mounting door scuffs or door steps, The cleaning step includes a plurality of sub-steps, wherein each sub-step may optionally use a water or alkaline cleaning liquid.

Various embodiments in which the technical features of the present invention are reflected may be derived and understood based on the detailed description of the present invention described below by those skilled in the art.

Effects of the method and apparatus according to the present invention will be described as follows.

The present invention relates to a method of coating a nano-coating material of a ceramic silicon series on a surface of a scuffed body to maintain a flat state while maintaining a uniform thickness and to provide a coating material on the surface of a pattern formed by etching, It is possible to maintain the original state for a long period of time by improving the abrasion resistance while preventing corrosion and forming a coating layer so as to maintain the original state for a long period of time, to be.

The effects obtainable by the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. It is to be understood, however, that the technical features of the present invention are not limited to the specific drawings, and the features disclosed in the drawings may be combined with each other to constitute a new embodiment.
1 illustrates a method of nano coating of a door scuff or door step for a vehicle.
2 illustrates a door scuff or door step for a vehicle.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus and various methods to which embodiments of the present invention are applied will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

In the description of the embodiments, when it is described as being formed on the "upper" or "lower" of each element, the upper or lower (lower) And that at least one further component is formed and arranged between the two components. Also, the expression "upward" or "downward" may include not only an upward direction but also a downward direction on the basis of one component.

A door scuff for a vehicle is formed by etching a surface of a scuff body composed of a plate member made of aluminum or stainless steel to express various patterns and applying a coating material to the surface of the scuff body to prevent corrosion while preventing corrosion For the purpose of forming a coating layer. Such a coating layer is formed for the purpose of corrosion prevention, improvement of smoothness, wear protection, etc., and can be widely applied to automobile parts. The coating layer may be formed thin on the surface to prevent changes in the characteristics of the metal constituting the automotive door scuff while taking advantage of the surface characteristics of the automotive door scuff.

When coating the surface of the door scuff of a vehicle, it is visually confirmed that the surface of the door scuff does not become flat after the coating is completed, and that the coating material forms a wavy pattern when the coating material is sprayed by spraying So that the quality of the product can not be maintained at a high level. In addition, since the operator takes a form in which the coating material is applied to the surface of the door scuff with the spray, the thickness of the coating layer may vary depending on the condition, experience, or skill of the operator, . Particularly, in the process of applying the coating material to the surface of the door scuff using the sprayer, the coating material is frequently not applied to a portion where the embossed pattern and the embossed or penetrating pattern formed by the etching are located, The material is concentrated on the edge of the door scuff or pattern and becomes excessively protruding.

If the coating material is not evenly applied to the surface of the door scuff or the door scuff including the uncoated portion is mounted on the vehicle, corrosion is easily caused by the calcium chloride sprayed on the road during the winter season, It is not possible to attain corrosion prevention and damage prevention as the original purpose, since the coating material is not present at the time of connection or easily causes scratch-like damage to the thinly coated portion. To overcome this, the nano-coating technique can be applied to the surface of door scuffs or door steps in the process of manufacturing door scuffs or door steps.

Nanocomposite technology is a technology that improves the product function by uniformly applying nanoparticles to the surface of the product. Its function varies depending on the types of nanoparticles applied. Typical nanoparticles include silica, metal nanoparticles, ceramic nano- Particles, carbon nanotubes, and the like. The effect obtained by coating these nanoparticles on the surface of door scuffs or door steps can be enhanced by enhancing the resistance to mechanical properties (scratches, damage, abrasion, impact, etc.) or by improving the functionality of the coating material (adhesion, permeability, gas permeability , Corrosiveness, conductivity, staininess, etc.).

Process equipment for nanocomposites includes equipment that forms a coating of nanoparticles very thinly on the surface of a scuff or door step and may vary depending on the coating method (wet coating or dry coating). For example, the apparatus for wet coating may include a coating apparatus for spraying or applying a coating liquid, a drying apparatus using hot air or infrared rays, a curing apparatus capable of performing thermal curing, infrared curing, ultraviolet curing, or the like.

For example, when water-repellent coating is performed through a nano-coating, when water (liquid) touches the surface of a door scuff or a door step, the surface tension is reduced to prevent water from penetrating the surface, have. In addition, when water droplets are formed on the coated door scuffs or door steps, movement is easy and corrosion does not occur on door scuffs or door steps.

Figure 1 illustrates a method of nano coating of a door scuff or door step for a vehicle, and Figure 2 illustrates a door scuff or door step for a vehicle. Hereinafter, a preferable coating process for achieving the above object will be described with reference to the accompanying drawings.

According to an embodiment of the present invention, there is provided a method of coating a door scuff or door step for a vehicle, comprising: preparing a metal plate including a plurality of door scuffs or door steps including a plurality of patterns having different depths formed through an etching process A step 14 of cleaning the surface of the metal plate 12, a step 16 of selecting a clean metal plate by performing a visual inspection to see if there is a defect on the surface, a step 16 of removing the foreign matter adsorbed on the surface of the metal plate, (18) a step (18) of performing a primer coating process for applying a primer coating solution so that the nano coating can smoothly take place on the surface from which the foreign substance is removed, (20) a step (20) A step (22) of performing a drying step (22) of a first step of drying and drying using a drier to prevent a foreign matter from being seated on the surface, Performing a second dust removing process (step 24) for removing foreign matter adsorbed on the surface of the primary coating liquid; and applying a hydrophobic nano-coating liquid of a ceramic silicon series uniformly on the surface coated with the primary coating liquid by using a roll coater A step 28 of performing a coating process for forming a coating layer, a step 28 for carrying out a drying process by a second step for preventing foreign matter from being adsorbed on the surface of the coating layer by electrochemically coating the coating layer using an infrared (IR) (30) a step of performing a drying and curing process (30) in which a door scuff or a door step is put into a hot air dryer and the coating layer is completely dried by curing at a temperature of 150 ° C for 1 hour, A laminating step of attaching a protective film on the coating layer to prevent contamination and damage of the coating layer; (36) of performing a pressing process for separating the metal plate into a plurality of door scuffs or door steps after performing the laminating process, and a step (36) for mounting the door scuff or door step Or performing a punching process (38) to form a guide pin.

In the metal plate preparation step 12, a plurality of patterns 62 may be formed on the surface of the metal plate 64 on which a plurality of door scuffs or door steps 60 may be formed through an etching process. The plurality of patterns 62 formed on the metal plate 64 may include a plurality of patterns 62a and 62b having different depths depending on the design.

In the cleaning process step 14, the surface of the metal plate 64 having various patterns can be cleaned by using a pattern 62 of a narrow and deep shape, embossed or engraved or penetrating. In the cleaning process step 14, foreign substances adhering to the surface of the metal plate 64 can be removed by spraying the cleaning liquid of 45 ° C to 47 ° C onto the metal plate 64. For example, the cleaning liquid may be a mixture of 5% caustic soda (sodium hydroxide) and 95% water. The cleaning liquid may be sprayed onto the surface of the metal plate 64, wiped with a sponge, and blown with air by a blower to dry. Typically, the cleaning process can be divided into a pre-treatment and a post-treatment, wherein the cleaning process step 14 can be seen as a pretreatment process. On the other hand, an alkaline wet (Akali Wet) cleaning method can be used for the cleaning step. As the cleaning liquid, potassium hydroxide (KOH), sodium hydroxide (NaOH), ammonia water (NH4OH) and the like can be used. In particular, sodium hydroxide (NaOH) may be more environmentally friendly.

According to an embodiment, for cleaning of the metal plate 64, the cleaning process step 14 can be implemented in a plurality of sub-processes. For example, the cleaning process can be performed in five steps. In the first and second steps, cleaning is performed using water, then in step 3, alkaline cleaning is performed, and in steps 4 and 5, water is used again. At this time, a cleaning liquid mixed with 5% sulfuric acid and 95% water can be used for alkali cleaning.

After the cleaning process step 14, it is possible to carry out a metal plate sorting step 16 for selecting a metal plate 64 in a clean state by performing a visual inspection for the presence of defects such as scratches or scratches on the surface of the metal plate 64. One metal plate 64 may include a plurality of door scuffs or door steps 60 so that the appearance inspection may be centered around the area where a plurality of door scuffs or door steps 60 are located. If a plurality of door scuffs or door steps 60 are not located on the surface of the metal plate 64 and there is a defect such as scratches or scratches that do not interfere with the subsequent process, Can be used. However, when a defect such as a shot or a scratch is located in a region where a plurality of door scuffs or door steps 60 are located (for example, a peripheral region of the pattern 62) .

In the primary dust removal process step 18, foreign matter such as fine dust adsorbed by static electricity or the like on the surface of the metal plate 64 after cleaning through the cleaning process step 14 can be removed. For example, a non-contact type dust removing apparatus through a device for spraying air to remove fine dust adsorbed by static electricity or the like on the surface of the metal plate 64 may be used. According to the embodiment, it is also possible to use a device in which a roller is disposed between the static electricity prevention means on the metal plate 64 to remove the static electricity of the dust adsorbed on the surface and wipe it off with the roller.

In the primer processing step 20, a primer coating is performed using a coater or coating apparatus so that the nano coating can smoothly be performed on the surface of the metal plate 64 that has undergone the primary dust removing process step 18. As the apparatus for coating the primer, a device such as a wet coating method such as a slot die, a gravure, an ink jet method, a nozzle jetting method, or a spin method may be used. For example, the primer solution may be applied to the surface of the metal plate 64 at about 10 g / m ² . The primer treatment may be suitably applied to a method of modifying a surface which is not suitable for bonding physically or chemically to a surface suitable for adhesion instead of an etching method or the like. In particular, the surface of the door scuff or door step can include patterns of various shapes and depths, so that physical or chemical etching of the surface facilitates adhesion, which can distort a plurality of patterns contained in the surface of a door scuff or door step And may not be suitable. Further, the primer may not only increase the adhesiveness but also prevent the surface of the metal plate 64 from being oxidized.

In the primary drying step 22, the primer coating solution applied to the surface of the metal plate 64 is dried by using an infrared (IR) drier to prevent fine dust or the like from being seated on or adsorbed on the surface of the primer coating solution It is possible to prevent the bad phenomenon that may occur during the nano coating process. For example, an infrared dryer can use infrared rays irradiated from a heater. Infrared rays can be absorbed by reaching the door scuff or door step through the space in the infrared drier. If the space in the dryer is not in a vacuum, infrared radiation can heat the air and reduce the amount of heat from the infrared rays reaching the door scuff or door step. Infrared rays can be absorbed while heating the water vapor in the dryer, which includes door scuffs or door steps. Infra-red ovens can radiate electromagnetic waves to heat the door scuffs or door steps and cure the paints simultaneously. Infrared heating is very fast and can be performed in three wavelengths: short wavelength, medium wavelength, long wavelength There may be types of.

Here, the drying may include a step of drying the product by evaporating the liquid by applying heat or wind to a door scuff or a door step including a liquid such as a small amount of water or a solvent such as a primer. Depending on the surface condition of the door scuff or the door step, it is necessary to selectively use or combine the infrared drier and the hot air drier.

In the secondary dust removal process step 24, even when the primer coating solution is dried, foreign matter such as fine dust adsorbed on the surface of the metal plate 64 is cleanly removed using a clean machine, and the foreign matter such as fine dust Thereby making it possible to eliminate the phenomenon that the surface becomes uneven.

In the coating process step 26, the nano-coating liquid of the ceramic silicon series is uniformly coated on the surface of the metal plate 64 by using a roll coater to form the coating layer 66. In this process, And can be conducted to the surface of the metal plate 64 through the roll of the roll coater. Here, the roll coater using rollers is suitable for depositing a uniform coating layer on a door scuff or door step 60 in which a pattern having different depths is formed. On the other hand, the nano-coating liquid of the ceramic silicon series may have a hydrophobic property and a structure suitable for scratch or corrosion prevention.

When the nano coating liquid is coated using a roll coater, the roll coater is controlled to adjust the pressure or the interval of the rolls so that the thickness of the metal plate 64 including a plurality of patterns 62a and 62b of different depths The nano-coating solution is transferred to the metal plate 64 while being pressed together so as to maintain a uniform flatness (high flatness) so as to prevent the generation of a wavy pattern after coating.

A plurality of patterns 62a and 62b are formed on a plurality of patterns 62a and 62b of different depths included in the door scuff or door step 60 when the nano coating liquid is applied to the surface of the metal plate 64 through the rolls of the roll coater. Since the nano-coating liquid is applied to the surface of the nano-coating liquid in a larger amount than the surface of the nano-coating liquid 62a and 62b, the coating of the nano-coating liquid does not allow room for penetration of corrosive substances such as calcium chloride. .

According to the embodiment, when the nano-coating liquid is conducted (coated) on the surface of the metal plate 64 by using a roll coater, it may be performed at one time, but it is first applied to the surface of the metal plate 64, Or by leveling (dip roll coating) the surface of the metal plate 64.

In the secondary drying step 28, a coating layer 66 formed of a nano coating liquid coated on the surface of the metal plate 64 is electrostatically charged using an infrared (IR) drier to remove impurities such as fine dust from the coating layer 66, Can be prevented from being adsorbed on the surface of the substrate.

In the drying and curing process step 30, the metal plate 64 may be charged into a hot-air dryer such as a box-type oven to completely dry the nano-coating liquid. In the drying and curing process step (30), the normal drying condition may be performed at a temperature of 150 ° C for about 1 hour. Drying with constant temperature and humidity of hot air is called normal drying condition. If the temperature of hot air is changed, the relative humidity, specific heat, density, viscosity and thermal conductivity of hot air may change. For example, if the temperature of the hot air is doubled, the heat transfer coefficient can be reduced to 83%, and even if the temperature is increased by 200%, the efficiency can be 166%. Drying at a high temperature for a short time may have the advantage of reducing the processing time, but excessive thermal energy may be applied to the coating layer, which may cause cracks in the coating layer.

On the other hand, in the hot air drying, the wind speed of the hot air can change the drying speed. For example, since the heat transfer coefficient of a drying condition is proportional to √2 of the wind speed, the rate of constant drying can also be proportional to √2.

In addition, the direction of hot air in the dryer can also affect the drying time. For example, when hot air flows in parallel to a metal plate including a plurality of door scuffs or door steps (circular wind), the drying speed is large and can be rapidly reduced in order to make contact with the hot hot air near the metal plate inlet. In the preheating period and the surface evaporation period of the material in the hot air dryer, hot plate hot air can be used to contact the hot plate with the hot plate, and it may be suitable for drying the material sensitive to overheating. On the other hand, in case of hot air blowing perpendicular to the material, the heat transfer rate and mass transfer coefficient can be increased, so that the drying speed can be increased. In addition, when the hot air is backed up against the data (backward wind), the temperature of the hot air in the vicinity of the metal plate outlet and the hot air at the inlet of the contact material are lowered, and may be suitable for the case where the heat resistant material is highly dried.

In the inspection process step 32, the operator confirms the surface of the metal plate 64 in a dried state with the naked eye to determine whether the metal plate 64 is clean or not by observing the smear, the etching state, the coating state, and the scratch state.

In the laminating process step 34, a protective tape or a protective film 68 coated with a pressure-sensitive adhesive is attached to the surface of the metal plate 64 in the steady state which has passed the inspection process, and the coating layer 66 To prevent contamination or damage. The laminating process may involve laminating the same or different types of paper, film, fabric, etc. using adhesive resins and heat. For example, as the protective film 68, a transparent surface protective film (PPF) for preventing abrasion can be used.

In the press process step 36, a plurality of door scuffs or door steps 60 arranged on one metal plate 64 by performing a pressing process corresponding to the size of the predetermined door scuff or door step 60 Can be separated. Through the pressing process, the door scuff or door step 60 can be formed to correspond to a precise design dimension.

In the punching process step 38, a guide hole or guide pin for mounting the door scuff or the door step 60 to the vehicle can be completed.

As described above, the door scuff or door step 60 to which the technique of the present invention is applied is a method in which a nano coating liquid made of a ceramic silicon based nanomaterial is smoothly formed on the surface of a door scuff or a door step 60 using a roll coater It is possible to eliminate the concern of corrosion by preventing the penetration of causes that may cause corrosion from the outside by allowing the nano coating liquid to be filled even in the areas where the patterns 62a and 62b having different depths can be coated and can be coated .

Further, since the coating layer 66 is formed on the surface of the door scuff or the door step 60 without any variation, there is no phenomenon such as occurrence of unevenness on the surface after coating is completed, And so on.

It is also contemplated that the coating layer 66 that is coated flat on the surface of the door scuff or door step 60 may proceed for a long period of time (e.g., 1 hour) at a low temperature .

The method according to the above-described embodiments may be implemented as a program to be executed by a computer and stored in a computer-readable recording medium. Examples of the computer-readable recording medium include a ROM, a RAM, a CD- , A floppy disk, an optical data storage device, and the like, and may also be implemented in the form of a carrier wave (for example, transmission over the Internet).

The computer readable recording medium may be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner. And, functional program, code, and code segments for implementing the above-described method can be easily inferred by programmers in the technical field to which the embodiment belongs.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

Claims (1)

Cleaning a surface of a metal plate including a plurality of door scuffs or door steps including a plurality of patterns having different depths formed through an etching process;
Performing a visual inspection to determine whether there is a defect on the surface to select the metal plate in a clean state;
Performing a first dust removing process for removing foreign substances adsorbed on the surface of the metal plate;
Performing a primer process for applying a primer coating solution so that a nano-coating can be smoothly performed on the surface from which the foreign substance is removed;
Drying the primer coating solution applied on the surface by using an infrared (IR) drier to prevent foreign matter from being seated on the surface;
Performing a second dust removing process in which the first cleaner removes impurities adsorbed on the surface after the drying process;
Performing a coating process for forming a coating layer by uniformly applying a hydrophobic nano-coating liquid of a ceramic silicon type on the surface to which the primary coating liquid is applied using a roll coater;
Performing a second step of drying the coating layer by using an infrared (IR) drier to prevent foreign matter from being adsorbed on the surface of the coating layer;
Performing a drying and curing process in which the door scuff or the door step is put into a hot air dryer and curing is performed at a temperature of 150 ° C for one hour to completely dry the coating layer to cure the cured product;
Checking the coating layer on the surface on which drying has been completed and determining whether the coating layer is amorphous;
Performing a laminating process of attaching a protective film on the coating layer to prevent contamination and damage of the coating layer;
Performing a pressing process for separating the metal plate into each of the plurality of door scuffs or door steps after performing the laminating process; And
And performing a punching step of forming a guide hole or a guide pin capable of mounting the door scuff or door step,
Wherein the step of cleaning the surface comprises a plurality of sub-steps, each sub-step selectively using water or an alkaline cleaning liquid.

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