KR100821352B1 - A coating method for uneven surface using thermal transcription film and the road lamp pole coated using the same - Google Patents

Abstract

The present invention relates to a coating method of a concave-convex surface using a thermal transfer film, and to a street lamp post coated using the same, and more particularly, a thermal transfer film is completely formed on a surface of a transfer object in which fine concavo-convex is formed using a vacuum nozzle. The present invention relates to a method of coating an uneven surface using a thermal transfer film which can coat a desired pattern on the surface of a transfer object without deformation by being in close contact with each other and can extend its life.

The coating method of the concave-convex surface using the thermal transfer film according to the present invention, in the method of performing a surface coating using a thermal transfer film on the tubular shaped transfer member having fine irregularities formed on the surface, the surface of the transfer object Forming a powder coating layer; After vacuum-coating a space between the thermal transfer film and the surface of the transfer object, the surface of the transfer object on which the powder coating layer is formed is wrapped with a thermal transfer film. Steps; A heat treatment step of transferring the paint in the thermal transfer film to the powder coating layer; Removing the thermal transfer film.

Thermal transfer film, vacuum adhesion, powder coating layer, fine unevenness, street lamp post

Description

A coating method for uneven surface using thermal transcription film and the road lamp pole coated using the same}

1 is a perspective view showing a street lamp post is formed with a fine concavo-convex surface is coated by a coating method using a thermal transfer film according to the present invention.

FIG. 2 is a cross-sectional view of the street lamp post of FIG.

3 is an enlarged view of a portion X in the cross-sectional view shown in FIG.

4A and 4B are views illustrating a process of vacuum bonding a thermal transfer film to a surface of a transfer object using a vacuum nozzle in the coating method using the thermal transfer film according to the present invention.

5A and 5B are enlarged cross-sectional views respectively showing a part of a cross section taken along line A-A 'shown in FIGS. 4A and 4B.

6A and 6B are cross-sectional views illustrating a state of a thermal transfer film attached to a surface of a transfer object in accordance with a vacuum pressure in a coating method using a thermal transfer film according to the present invention.

 Figure 7a to 7c is a tomography photograph showing the degree of penetration of the sublimation ink penetrated into the powder coating layer according to the temperature of the heat treatment step in the coating method using the thermal transfer film according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: street lamp holding 20: metal tube

22: Uneven 24: Bubble

30: powder coating layer 40: thermal transfer film

50: vacuum nozzle

The present invention relates to a coating method of a concave-convex surface using a thermal transfer film, and to a street lamp post coated using the same, and more particularly, a thermal transfer film is completely adhered to the surface of a transfer object in which fine concavo-convex is formed using a vacuum. By coating a desired pattern on the surface of the transfer object without deformation, it relates to a method of coating the uneven surface using a thermal transfer film that can extend the life.

In general, struts used as streetlights installed around roads or as pillars for traffic lights, road guides, road billboards for pedestrians and pedestrian crossings are formed at the installation location, and then form foundation molds and cast and cure concrete. After the foundation is formed, it is covered and the support is installed in the anchor formed on the foundation. Since these pillars have to be maintained for a long time even in harsh environments, metal tubes are mainly used as main materials, and cast iron or stainless steel are mainly used.

Since the pillars made of these metal tubes have the disadvantage of giving a cold feeling unique to the metals, they are produced by applying liquid coatings using organic solvents, reactive monomers, or water solvents, which are used in general paints, on the surface of the pillars. Pollution problems such as air pollution and water pollution, and problems such as efficiency of thick film formation (film defects), as well as solvent vapors that are harmful to the human body, may damage workers' health. In addition, since the coating is easily peeled off by the harsh environment after the installation of the prop, it is not very good to look at it aesthetically, and there is a possibility that the part peeled off due to rain or snow may corrode more quickly. Alternatively, since the coating work needs to be performed again using a ladder, the waste of the cost and the work risk of the coating work are also pointed out as a high problem.

In addition, since the pillars made of these metal pipes are installed only depending on the purpose of use regardless of the surrounding environment, they are not suitable for the surrounding environment, and thus, the production of the pillars that suits the surrounding environment is required.

As one of the methods for solving the above problems, a method of compressing and heating a thermal transfer film having a pattern of wood, marble, fancy pattern, etc. printed on the surface of a metal panel such as aluminum or steel is coated. It is disclosed in Korean Unexamined Patent Publication No. 2003-33795. Here, the surface of the metal panel is coated by powder-coating the surface of the metal panel, and then transferring the pattern by pressing and heating a thermal transfer film printed with various patterns such as wood, marble, granite, and fancy patterns on the surface of the powder. In this case, since the thermal transfer film is simply pressed and heated by a stamping machine while being transferred onto the powder surface of the metal panel, bubbles may be generated between the powder surface and the thermal transfer film. In order to prevent bubbles from occurring between the surface of the powder and the thermal transfer film, the two surfaces must be completely in contact with each other. However, there is still a fear of bubble generation by a simple method of pressing heating.

In particular, when this method is applied to the method of coating the surface of the street lamp post, fine recesses and protrusions are formed on the surface of the street lamp post to prevent the attachment of illegal leaflets. Different compressive strength at) causes the problem that the thermal transfer film is not squeezed in the recess and more bubbles are generated so that the sublimation ink in the thermal transfer film is not transferred to the recess during thermal transfer so that the pattern of the desired shape is not coated by the operator. Done.

In addition, since the shape of the street lamp post is mostly made of a tubular body, there is also a problem that it is difficult to apply a pressing and heating process using a stamping machine applied to a conventional rectangular plate body.

Therefore, in order to solve the above problems, the present invention forms a powder coating layer on the surface of the transfer member having fine irregularities, and wraps the surface of the transfer member with a thermal transfer film, and then between the thermal transfer film and the transfer target body. After making the vacuum state, the thermal transfer film is closely adhered to the surface of the transfer object, and then a heat treatment process is carried out to absorb the sublimation ink in the thermal transfer film into the powder coating layer, whereby the desired surface of the transfer object is formed. To provide a coating method of the uneven surface using a thermal transfer film and a coated street lamp post using the thermal transfer film to be able to coat the pattern of the shape without deformation, and to apply the thermal transfer film to the transfer body made of various shapes. There is this.

In order to achieve the above object, the coating method of the concave-convex surface using the thermal transfer film according to the present invention, a method of performing a surface coating using a thermal transfer film on the tubular shaped transfer body in which the fine concavo-convex is formed on the surface Forming a powder coating layer on a surface of a transfer object; After vacuum-coating a space between the thermal transfer film and the surface of the transfer object, the surface of the transfer object on which the powder coating layer is formed is wrapped with a thermal transfer film. Steps; A heat treatment step of transferring the paint in the thermal transfer film to the powder coating layer; Removing the thermal transfer film.

According to the present invention, it is used as a pillar such as a street lamp, a traffic light, a road guide plate, a road advertisement board, and the heat transfer film coated with various types of patterns on the surface of the support where fine unevenness is formed on the surface by vacuuming the support and the support. By preventing bubbles from forming between the thermal transfer films, various patterns can be transferred to the support surface without deformation. In addition, since the thermal transfer film can be adhered to the surface of the transfer object using a vacuum, various types of transfer objects can be coated using the thermal transfer film.

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

1 is a perspective view showing a street lamp post having a fine uneven surface coated with a coating method using a thermal transfer film according to the present invention, and FIG. 2 is a cross-sectional view of the street lamp post of FIG. 3 is a view showing an enlarged state X in the cross-sectional view shown in FIG.

Street lamp post 10 according to the present invention is composed of a metal tube 20 made of various shapes, such as cylindrical, rectangular columnar, and the powder coating layer 30 formed on the surface of the metal tube 20, powder coating layer 30 is coated by sublimation ink penetrated from the thermal transfer film.

Referring to FIG. 3, it can be seen that the fine concavo-convex 22 is formed on the surface of the metal tube body 20, which does not facilitate the attachment of illegal leaflets such as stickers or advertisements, and the like. It is formed to facilitate removal.

Next, a coating method using a thermal transfer film according to an embodiment of the present invention will be described with reference to the accompanying drawings.

4A and 4B are views illustrating a process of vacuum bonding a thermal transfer film to a surface of a transfer object using a vacuum nozzle in the coating method using the thermal transfer film according to the present invention, and FIGS. 5A and 5B are diagrams. Sectional drawing which expands and shows a part of cross section along line A-A 'shown to 4A and 4B, respectively.

First, prepare a street lamp post 10 which is a transfer body. Street lamp post 10 is made of a metal tube 20 of various forms, such as cylindrical, square, hexagonal or octagonal, it is cut to meet the specifications. Here, the fine concavo-convex 22 is formed on the surface of the metal tube 20.

Next, a pretreatment process for removing impurities from the prepared metal tube 20 is performed. This is to uniformly deposit the powder coating layer 30 formed thereafter.

When the pretreatment process is completed, the powder coating layer 30 is formed on the surface of the metal tube 20. The powder coating layer 30 is formed by using a powder coating containing a synthetic resin, a pigment, and a curing agent pillar, and the synthetic resin includes polyethylene (PE), polyester (PET: polyester), or polyurethane (polyurethane). Can be. Here, polyurethane is superior in elasticity compared to polyethylene or polyester and is not easily damaged by external impact. Therefore, when polyurethane is used for the powder coating layer 30, there is less possibility that the strut surface exposed to the poor external environment is damaged by the impact or the coating is peeled off.

Next, the metal tube 20 in which the powder coating layer 30 is formed is wrapped with the thermal transfer film 40 coated with various patterns. At this time, the thermal transfer film 40 is used in consideration of the unevenness formed on the surface of the metal tube 20.

Thereafter, the vacuum nozzle 50 is attached to both ends of the thermal transfer film 40, that is, both ends of the metal tube 20.

Then, the vacuum nozzle 50 mounted at both ends of the metal tube 20 is connected to a vacuum device such as a vacuum pump, and the air inside the thermal transfer film 40 is exhausted through the vacuum device to heat transfer film 40. The vacuum transfer between the metal tube 20 and the heat transfer film 40 to be in close contact with the surface of the metal tube 20. At this time, the vacuum pressure inside the thermal transfer film 40 is -100mhg to -200mhg, and under this condition, the thermal transfer film 40 is formed along the surface of the unevenness 22 formed on the surface of the metal tube 20. Fully adhered When the thermal transfer film is adhered to the surface of the transfer object using a vacuum as described above, the surface of the transfer body having various shapes as well as the unevenness may be formed using the thermal transfer film.

6A and 6B are cross-sectional views showing a state of a thermal transfer film attached to a surface of a transfer object in accordance with a vacuum pressure.

When the vacuum pressure inside the thermal transfer film 40 is small, as shown in FIG. 6A, bubbles 24 are generated at the recesses of the unevenness 22, so that the thermal transfer film 40 and the powder coating layer 30 are separated from each other. When the vacuum pressure inside the thermal transfer film 40 is excessively large, as shown in FIG. 6B, the thermal transfer film 40 is torn at the iron part and air is introduced from the outside to release the vacuum, thereby causing the thermal transfer film. 40 and the powder coating layer 30 are lifted from each other. When the size of the vacuum pressure is not appropriate, bubbles 24 may be generated between the thermal transfer film 40 and the powder coating layer 30, or the thermal transfer film 40 may be torn, thereby causing an operator to desire the powder coating layer 30. The pattern is not coated, which acts as a cause of failure.

Therefore, an appropriate size vacuum pressure should be used, and as a result of repeated experiments, bubbles are formed between the thermal transfer film 40 and the powder coating layer 30 in order to effectively adhere the thermal transfer film 40 to the surface of the transfer object. Does not occur, and the appropriate vacuum pressure range in which the thermal transfer film 40 does not tear is found to be between about -100 and -200 mhg. The range of the vacuum pressure may vary depending on the shape of the uneven surface formed on the surface of the transfer object or the material of the thermal transfer film 40.

Then, the vacuum nozzle 50 is separated from the vacuum apparatus while maintaining the vacuum state inside the thermal transfer film 40, and then the metal tube 20 having the vacuum nozzle 50 coupled to both ends is removed. Transfer to the inside of heat treatment equipment and perform heat treatment process. The sublimation ink coated on the thermal transfer film 40 is penetrated into the powder coating layer 30 by the heat treatment process and coated. At this time, the heat treatment step is a heat treatment step to the temperature of the transfer object to 180 ℃ to 200 ℃ so that the sublimation ink of the thermal transfer film 40 can fully penetrate into the powder coating layer (30).

7A to 7C show the penetration degree of the sublimation ink penetrated into the powder coating layer according to the temperature of the heat treatment process, and [Table 1] shows the penetration depth of the sublimation ink according to the heat treatment temperature numerically. Here, the powder coating layer was formed to a thickness of 104.88㎛, and the thermal transfer film was attached to the surface of the street lamp post under vacuum pressure of -100mhg to -200mhg, and the thermoelectric process was performed at 160 ° C, 180 ° C and 200 ° C, respectively. The yarn film was removed.

Heat treatment temperature 160 ℃ 180 ℃ 200 ℃ Sublimation Ink Penetration Depth 19.32 μm 53.82㎛ 104.88㎛

According to Table 1, the degree of penetration of the sublimation ink is insignificant at 160 ° C, and it is understood that the sublimation ink sufficiently infiltrates the thickness of the powder coating layer at 200 ° C. In addition, if the heat treatment temperature is too high, care should be taken because the powder coating layer or the thermal transfer film may be damaged.

As a result of the repeated experiments, it was found that the heat treatment process temperature was about 180 ° C to 200 ° C in which the sublimation ink of the thermal transfer film sufficiently penetrated into the powder coating layer to effectively express various patterns and special textures. Here too, the temperature of the heat treatment process may vary depending on the material of the thermal transfer film or the thickness of the powder coating layer.

Thereafter, the metal tube 20 is separated from the heat treatment apparatus, and the thermal transfer film 40 attached to the metal tube body 20 is removed.

As described above, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

As described above, the coating method using the thermal transfer film and the street lamp post using the same according to the present invention, because the thermal transfer film can be completely adhered to the transfer member having a fine irregularities formed on the surface by using a vacuum transfer member The desired shape of the pattern can be coated without deformation, there is an effect that can be coated by applying a thermal transfer film to the transfer target of various forms.

In addition, by forming a powder coating layer using polyurethane having excellent elasticity on the surface of the transfer object, there is no fear that the coating on the surface of the transfer subject may be peeled off due to an external impact or the transfer object may be corroded, thereby extending the life. have.

Claims (7)

 (correction) In the method of performing a surface coating using a thermal transfer film on a tubular transfer member having fine irregularities formed on the surface, Forming a powder coating layer on the surface of the transfer object; After vacuum-coating a space between the thermal transfer film and the surface of the transfer object, the surface of the transfer object on which the powder coating layer is formed is wrapped with a thermal transfer film. Steps; A heat treatment step of transferring the paint in the thermal transfer film to the powder coating layer; Removing the thermal transfer film; The vacuum adhesion step, Attaching a vacuum nozzle to both ends of the transfer object and connecting the vacuum device; Operating the vacuum apparatus to make a vacuum between the thermal transfer film and the transfer object under a vacuum pressure of -100mhg to -200mhg. The heat treatment step, The vacuum nozzle is separated from the vacuum apparatus while maintaining the vacuum state inside the thermal transfer film, and then the transfer member having the vacuum nozzles coupled to both ends is moved into the heat treatment apparatus. ; Coating method of uneven surface using a thermal transfer film, characterized in that. The method of claim 1, Before forming the powder coating layer, a method of coating the concave-convex surface using a thermal transfer film, characterized in that to perform a pretreatment step of removing impurities on the surface of the transfer target. The method of claim 1, The powder coating layer, Coating method of the uneven surface using a thermal transfer film, characterized in that formed of one material selected from the group consisting of polyethylene, polyester and polyurethane. (delete) (delete) The method of claim 1, The heat treatment step, The coating method of the uneven surface using a thermal transfer film, characterized in that carried out at a temperature of 180 ℃ to 200 ℃.  (correction) A street lamp post having a surface coated with the coating method according to any one of claims 1, 2, 3 and 6.

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