Metal material printing equipment, printing method, and printed metal material obtained thereby

Abstract

The present invention relates to a printing apparatus for printing images such as characters and pictures on the surface of a metal material such as a steel plate, a printing method using the same, and a printed metal material obtained thereby.

Description

Technical Field

[0001] The present invention relates to printing equipment for printing images such as characters and pictures on the surface of metal materials such as steel plates, a printing method using the same, and a printed metal material obtained thereby.

Background Art

[0002] As methods for printing images such as characters and pictures on the surface of metal materials, there are a polymer transfer method, a roll transfer method, and an inkjet printing method.

[0003] The polymer transfer method outputs a sheet-shaped image film and transfers the image to the surface of the metal by methods such as thermal transfer and chemical transfer. Although it is easy to output the image on the film for the image transfer method on the metal surface using the film, there is a drawback that the manufacturing speed is slow because the film is transferred to the steel plate, and the image attached to the metal surface in the film form may be deformed by temperature and weather.

[0004] The roll transfer method is a method of forming a pattern of a certain pattern on the surface of a roll and transferring the image to the surface of the metal material using a roll-to-roll method. However, the transferred image is limited to a repeating image, and in order to use the roll transfer method, rolls with each image patterned must be prepared, so there is a difficulty that patterned rolls must be prepared every time for various images.

[0005] The inkjet printing method is a method of printing images and characters on the surface of a metal material using a liquid ink containing pigments and a polymer resin. When using the above inkjet printing method, there is a problem that the surface of the metal material must be plasma-treated or the surface roughness must be controlled so that the liquid can be well adsorbed on the surface of the steel plate. In addition, since the inkjet printing method uses a liquid ink, a clogging phenomenon occurs in the nozzles where the ink is ejected, and not only nozzle management but also periodic nozzle cleaning and replacement are required. Further, since a liquid ink is used, a stabilization operation after ink ejection is essential, and it is difficult to manufacture in a roll-to-roll method, and its use is limited to a batch type. In particular, the printed material for inkjet printing is in a form in which liquid polymers are linked, and since pigments form images therein, there is a problem that the printed image may peel off during bending or cutting.

[0006] Recently, metal materials are used in various fields, and images such as characters and pictures are often applied to the metal surface. However, the conventional image printing method is a method of printing on the surface of paper or polymer materials, and there are technical and production limitations in applying it to the surface of metal materials. Therefore, there is a need for a solution that can solve the limitations of the conventional printing method.

Summary of the Invention

Problems to be Solved by the Invention

[0007] One aspect of the present invention is a technology for printing images such as characters and pictures on the surface of a metal material, and a printing facility capable of printing an image on the surface of a metal material quickly and stably, a printing method using the same, and a printed metal material obtained thereby.

[0008] The problems of the present invention are not limited to the above-described matters. Further problems of the present invention are described in the overall content of the specification, and for those having ordinary knowledge in the technical field to which the present invention pertains, there is no difficulty in understanding further problems of the present invention from the content described in the specification of the present invention.

Means for Solving the Problems

[0009] One aspect of the present invention is a photosensitive drum 300 that adheres to a continuously moving metal material 100 and rotates in a certain direction to transfer and fix the toner T adhering to the surface to the surface of the metal material 100, a developing means 500 provided on one side of the photosensitive drum 300 to provide the toner T on the surface of the photosensitive drum 300, a photosensitive drum charging means 410 for charging the surface of the photosensitive drum 300 before the toner T is provided, an exposure means 200 for applying light energy to the surface of the photosensitive drum 300 according to a required image between the developing means 500 and the photosensitive drum charging means 410, a metal material charging means 101 for charging the surface of the metal material 100 so that the toner T adhering to the surface of the photosensitive drum 300 is transferred to the surface of the metal material 100, a removing means 600 for removing the toner T remaining on the surface of the photosensitive drum 300 after the toner T is fixed on the surface of the metal material 100, a photosensitive drum discharging means 420 for removing the charge of the photosensitive drum 300 after removing the toner T, a fixing means 700 located at the rear end of the photosensitive drum 300 for fixing the toner T fixed on the surface of the metal material 100, and provides a metal material printing facility including the above.

[0010] Still another aspect of the present invention is a charging step of charging the surface of a photosensitive drum 300 that rotates in a certain direction, an exposure step of applying light energy to the charged surface of the photosensitive drum 300 according to a required image, After the above exposure, a developing step of providing toner T on the surface of the photosensitive drum 300, and a transfer step of continuously moving the toner adhering to the surface of the photosensitive drum 300 and moving it to the surface of the continuously moving and charged metal material 100 for fixing, and a fixing step of fixing the toner fixed on the surface of the metal material 100, and a removing step of removing the toner remaining on the surface of the photosensitive drum 300 after the transfer, and a discharging step of discharging the surface of the photosensitive drum 300, and A metal material printing method is provided, including the above steps.

[0011] Still another aspect of the present invention is a printed metal material including a metal material and a printed layer formed on the metal material. A printed metal material is provided, including the above components.

Advantages of the Invention

[0012] The present invention provides a technology capable of stably printing images such as characters and pictures on materials such as metals, and by continuously manufacturing this, the production efficiency of products can be improved. In addition, by easily forming various and colorful images, there is an advantage that products with high added value can be manufactured.

[0013] The various and beneficial advantages and effects of the present invention are not limited to the above-described content, and can be more easily understood in the process of explaining the specific embodiments of the present invention.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0015] The terms used in this specification are for explaining the present invention and are not intended to limit the present invention. Also, the singular forms used in this specification include plural forms as well, unless the relevant definitions clearly indicate the contrary meaning.

[0016] The meaning of "including" used in this specification does not specify a configuration and does not exclude the existence or addition of other configurations.

[0017] Unless otherwise defined, all terms including technical terms and scientific terms used in this specification have the same meaning as commonly understood by those with ordinary knowledge in the technical field to which the present invention pertains. Terms defined in a dictionary are interpreted as having a meaning consistent with the relevant technical literature and the currently disclosed content.

[0018] Generally known laser or LED printing is for printing on flexible objects such as paper, but the present invention relates to a technology for printing an image on a metal material. The present invention relates to a printing equipment in which each configuration such as a charging means, a photosensitive drum, and a fuse roll is realized in one direction along the traveling direction of a metal material in order to print on the surface of a metal material that continuously moves in a manner such as roll-to-roll, and a printing method using the same.

[0019] In particular, according to the present invention, compared with the method of printing on an existing metal material, not only diverse and complex images but also images with various hues can be easily and economically realized.

[0020] Hereinafter, with reference to the drawings, preferred embodiments of the present invention will be described. The embodiments of the present invention can be modified in various forms and should not be construed as being limited to the drawings and the embodiments described below. They are provided to explain in detail to those with ordinary knowledge in the technical field to which the present invention pertains.

[0021] FIG. 1 schematically shows an embodiment of the printer equipment of the present invention. The printing equipment of the present invention is printing equipment for printing an image on the surface of a continuously moving metal material 100. As an example, as shown in FIG. 1 and the like, by printing an image on the surface of the continuously moving metal material 100 in a method such as roll-to-roll, there is an advantage that continuous mass production can be performed. On the other hand, the above image means characters, patterns, pictures, etc., and may be in various forms such as single color, achromatic color, chromatic color, three-dimensional pattern, etc.

[0022] The printing equipment of the present invention includes a photosensitive drum 300, a photosensitive drum charging means 410 and a photosensitive drum discharging means 420, an exposure means 200, a developing means 500, a metal material charging means 101, a removing means 600, a fixing means 700, etc. Hereinafter, each component will be described in detail.

[0023] The photosensitive drum 300 is in close contact with the surface of the metal material 100 and rotates in a certain direction while transferring the toner T adhering to the surface to the surface of the metal material 100 for fixing and transferring the image. In FIG. 1 and the like of the present invention, the photosensitive drum 300 is shown as rotating in one direction, but it does not necessarily rotate only in one direction and can also rotate in both directions. The photosensitive drum 300 may be one commonly used in the technical field to which the present invention pertains, and its type is not particularly limited. As a preferred example, an OPC (Organic Photo Conductor) drum can be used.

[0024] The developing means 500 is provided on one side of the photosensitive drum 300 and provides toner T for forming an image on the surface. The developing means 500 only needs to be able to provide toner to the photosensitive drum 300, and its form and pattern are not particularly limited. In FIG. 1, as a preferred example, the developing means 500 includes a toner container 520 that houses toner T and a developing roller 510 that transfers toner from the toner container 520 to the photosensitive drum 300. The developing roller 520 is not essential, and in some cases, it may be directly provided from the toner container 520 to the photosensitive drum 300. On the other hand, the toner T forms an image on the surface of a metal material, and all those known to an ordinary technician in the technical field to which the present invention belongs can be used, and its type is not particularly limited. As an example, a substance having a polymer structure may be used. Further, in the present invention, substances that can impart various functions to the toner (for example, fluorescent substances, magnetic substances, electrically conductive substances, etc.) can be added, not only can an image having functions be realized, but also the particles of the toner can be used in various ways to impart roughness or realize a three-dimensional shape.

[0025] Before the toner T is provided, it includes a photosensitive drum charging means 410 for charging the surface of the photosensitive drum 300. The photosensitive drum charging means 410 applies electrostatic charges to the surface of the photosensitive drum. As the charging means, a corona wire is usually used.

[0026] Between the above-described developing means 500 and the photosensitive drum charging means 410, an exposure means 200 is provided which applies light energy to the surface of the charged photosensitive drum 300 according to the required image. The position of the above-described exposure means 200 is not important, but the above-described light energy is applied to the surface of the photosensitive drum 300 between the above-described developing means 500 and the photosensitive drum charging means 410. By the above-described light energy, some charges are removed from the surface of the photosensitive drum 300, and toner adheres to the surface of the photosensitive drum 300 by the above-described developing means 500. The above-described light energy is preferably a laser or an LED (Light Emitting Diode). FIG. 2 schematically shows the exposure means 200 when using the above-described laser, and includes a laser generator 210 and a scanning mirror 220 that adjusts the laser emitted from the laser generator 210 and performs scanning according to the required image on the surface of the photosensitive drum 300 to remove charges.

[0027] In order for the toner T attached to the photosensitive drum 300 to move to the continuously moving metal material 100 and be fixed, a metal material charging means 101 for charging the surface of the metal material 100 is included. The metal material charging means 101 not only serves to charge the metal material to a certain charge, but can also serve as a guide roll to help the metal material move at a certain speed. One or more of the above-described metal material charging means 101 can be provided, and the metal material charging means 101 can be formed at the front end, rear end, or both front and rear ends of the photosensitive drum 300 with reference to the advancing direction of the metal material 100, and can be located at the upper part, lower part, or both upper and lower parts of the metal material 100. Even if there are two or more of the above-described metal material charging means 101, they do not play different roles, but there is an advantage in that a stronger electrostatic attraction can be ensured through charging two or more times.

[0028] On the other hand, FIG. 3 shows another implementation example of the present invention. As shown in FIG. 3, a separate coating layer A, for example, a resin layer or the like, is formed on the surface of the metal material 100. When printing on the coating layer, a metal charging means 101' for charging the coating layer A can be located above the coating layer A.

[0029] After the toner T is fixed on the surface of the metal material 100, a removing means 600 for removing the toner T remaining on the surface of the photosensitive drum 300 is included. The removing means 600 can include a blade 610 for separating the residual toner on the surface of the photosensitive drum 300 and a recovery cylinder 620 for recovering the separated toner at the lower end of the blade 610 to prevent the separated toner from falling onto the metal material 100 and degrading the printing quality.

[0030] After the toner T is fixed on the metal material, a fixing means 700 for fixing the toner T on the metal material 100 and stably forming an image can be provided at the rear end of the photosensitive drum 300 with reference to the advancing direction of the metal material 100. The fixing means 700 can include a fusing roll 710 for applying heat to the toner T and fixing the toner T fixed on the metal material 100, and a pressure roll 720 for applying pressure to assist in fixing. At this time, the heating temperature of the fusing roll 710 is preferably 25 to 400 °C.

[0031] In the present invention, it is more preferable that the metal material charging means 101 and the pressure roll 720 have a structure that can move up and down. The metal material 100 may not always have a constant thickness, and may be a very thin thin film or a thick plate in some cases. Therefore, if the metal material charging means 101 and the pressure roll 720 can move up and down with a variable structure according to the thickness of the metal material 100, an image can be printed regardless of the thickness of the metal material 100.

[0032] FIG. 4 schematically shows yet another example of the printer equipment of the present invention. The printing equipment shown in FIG. 4 is a more specific embodiment of the removing means 600 for removing the toner remaining on the surface of the photosensitive drum 300 after the toner T on the photosensitive drum 300 moves and is fixed on the surface of the metal material 100. In addition to the blade 610 and the recovery cylinder 620 described above, an alcohol brush 630 can be further included. Since the photosensitive drum 300 transfers an image while rotating at a high speed, it may not be easy to remove the toner. In such a case, there is a problem that an afterimage of the image may remain. For this reason, after the primary removal is performed with the blade 610, the secondary removal can be performed by a chemical method using an alcohol brush 630 or the like.

[0033] On the other hand, one or more toners can be used to print various images. In this case, two or more photosensitive drums, photosensitive drum charging means, photosensitive drum discharging means, exposure means, developing means, and removing means can be provided in pairs along the traveling direction of the metal material. FIG. 5 schematically shows yet another example of the printer equipment of the present invention. FIG. 5 realizes printing equipment for providing four types of toners to transfer an image in order to print a color image. The four types of toners may be C (Cyan), Y (Yellow), M (Magenta), and K (Black), respectively. The types of the toners do not necessarily have to be four, and W (White) can also be included. Among them, some or more of them can be used repeatedly, and the order is not determined. Those skilled in the art can arbitrarily select them in consideration of the required image, working efficiency, etc. However, the white (W) toner can be positioned at the most forward position in the traveling direction of the metal material.

[0034] Figure 5 shows the printing equipment when using four types of toner. In Figure 5, in order to fix four types of toner on the metal material 100, four pairs of photosensitive drums 301, 302, 303, 304, photosensitive drum charging and discharging means 401, 402, 403, 404, exposure means 201, 202, 203, 204, developing means 501, 502, 503, 504 and removing means 601, 602, 603, 604 are provided. However, the fixing means 700 for fixing the toner fixed on the metal material 100 is for finally fixing the image, and does not necessarily need to be plural.

[0035] On the other hand, as shown in Figure 5, when using a large number of photosensitive drums, due to the characteristics of the roll-to-roll method, there is a possibility that the metal material 100 may slack. Therefore, support rolls 111, 112, 113, 114 for supporting the above metal material and achieving continuous movement can be further provided. It is preferable that the support rolls 111, 112, 113, 114 also have a variable structure that can move up and down according to the thickness of the metal material 100.

[0036] Figure 6 shows still another embodiment of the present invention. Figure 6 relates to an equipment capable of sequentially or simultaneously printing both sides of a metal material 100 on which the above-described printing equipment continuously moves, and schematically shows that the printing equipment in the above-described form is located above and below the metal material. That is, each component having the above-described functions and roles is provided above and below the metal material, showing a technique capable of printing both the front and back surfaces of the metal material.

[0037] Hereinafter, the printing method of the metal material of the present invention will be described in detail. Hereinafter, the printing method will be described with reference to the above drawings.

[0038] The present invention is a method for printing an image on the surface of a continuously moving metal material 100. First, the surface of a photosensitive drum 300 rotating in a certain direction is charged. A charged layer of any one charge is formed on the surface of the photosensitive drum 300, and then preparations are made to apply an image using toner T. The surface of the photosensitive drum 300 may be either positively (+) charged or negatively (-) charged.

[0039] Exposure is performed to apply light energy to the surface of the photosensitive drum 300 with the charged layer formed and charged. By removing the charges on the surface of the photosensitive drum 300 using light energy, the toner can be moved on the surface of the photosensitive drum 300 according to the required image. The light energy may be in various forms, and it is preferable to use a laser or an LED light source.

[0040] Toner is attached to the surface of the exposed photosensitive drum 300, and this is called the developing stage. The toner is charged with a charge opposite to the charged charge of the photosensitive drum 300 and adheres to the surface of the photosensitive drum 300. In the developing stage, referring to an example in FIG. 1, the developing roller 510 moves a certain amount of toner T from the toner container 520 to the photosensitive drum 300. However, the developing roller 510 is not necessarily required, and it may move directly from the toner container 520 to the photosensitive drum 300. That is, the developing stage is a process in which toner adheres according to the required image on the surface of the photosensitive drum 300.

[0041] Subsequently, the toner adhering to the surface of the photosensitive drum 300 moves to the charged metal material 100 that continuously moves, and a transfer stage for fixing the toner on the surface of the metal material 100 is performed. The metal material 100 is charged with the same charge as the photosensitive drum 300 and charged with a charge opposite to that of the toner, so that the toner on the photosensitive drum moves to the metal material 100. The transfer stage is a process in which an image is printed on the surface of the metal material 100. The metal material 100 is charged with a charge opposite to that of the toner, and thus attracts the toner and fixes it on the surface of the metal material 100. The charging of the metal material 100 can be performed before, after, or both before and after the transfer stage. On the other hand, as shown in FIG. 3, when printing is performed on the coating layer A with a separate coating layer A formed on the surface of the metal material 100, a metal material charging means 101' that can charge the coating layer A can be further provided.

[0042] The toner fixed on the surface of the metal material 100 undergoes a fixing stage. The fixing stage can be performed by a thermocompression bonding method. Specifically, heat is applied and pressure is applied simultaneously by a fuse roll 710 and a pressure roll 720. At this time, the heating temperature is preferably 25 to 400°C. In the case of the toner used in the present invention, as described above, it is used for printing on a metal material, and the main component has a polymer structure. In particular, since the metal material has a high heat transfer rate, it is difficult to melt and adsorb the toner, so it is necessary to heat to an appropriate temperature to adsorb the toner. For this purpose, since the reaction occurs at a temperature above room temperature and can be fixed on the surface of the metal material, the heating temperature is preferably 25°C or higher. On the other hand, if it exceeds 400°C, there is a possibility that the polymer structure of the toner may be decomposed, so it is preferable that the heating does not exceed 400°C. More preferably, it is heated at 50 to 300°C.

[0043] Separately from the above metal material 100, a removal step is performed to remove the toner remaining on the surface of the photosensitive drum 300 after transfer. This is because the remaining toner may cause an afterimage in the subsequent printing process, which may reduce the print quality. At this time, as shown in FIGS. 1 and 4, the removal method is to perform physical removal through the blade 610, and in order to prevent the toner removed in this way from falling onto the metal material, it can be collected in the collection cylinder 620. On the other hand, for more complete removal, chemical removal can be further performed using the alcohol brush 630 after the above physical removal.

[0044] After that, in order to eliminate the charges remaining on the photosensitive drum 300, a step of discharging the surface of the photosensitive drum 300 is performed. By the above discharge, the photosensitive drum 300 is prepared to be able to perform new printing.

[0045] The printing method of the present invention can print a color hue image using toners T of two or more hues, that is, various hues such as W (White), C (Cyan), Y (Yellow), M (Magenta), K (Black). At this time, printing can be performed using two or more toners. At this time, as described above, there are two or more pairs of a photosensitive drum, a photosensitive drum charging means, a photosensitive drum discharging means, an exposure means, a developing means, and a removing means. By performing the charging step, the exposure step, the developing step, the transfer step, and the removing step two or more times along the advancing direction of the metal material, various hues can be realized. The order of the above hues is not particularly limited in the present invention and can be determined in consideration of the required image, work efficiency, etc.

[0046] An example in this regard is shown in FIG. 5. In FIG. 5, four pairs of a photosensitive drum, a photosensitive drum charging means, a photosensitive drum discharging means, an exposure means, a developing means, and a removing means are provided to perform printing by advancing each step. On the other hand, when using a white (White) toner at the forefront with respect to the advancing direction of the metal material, since the white background image can be transferred first, there is an advantage that the sharpness of the overall image can be enhanced.

[0047] On the one hand, as shown in FIG. 6, in order to perform printing on both the upper and lower surfaces of the metal material, the printing method of the present invention described above can be sequentially or simultaneously applied to the upper and lower surfaces to print an image on both surfaces of the metal material.

[0048] Next, the printed metal material obtained by using the above printing equipment or printing method will be described in detail. FIG. 7 schematically shows the printed metal material of the present invention, and the present invention will be described in detail with reference to FIG. 7.

[0049] The printed metal material of the present invention includes a printed layer formed on the metal material as shown in FIG. 7(a). The metal material is not limited in its type, such as a steel plate, a non-ferrous metal, a metal alloy, etc., as described above.

[0050] The above printed layer is preferably formed by using the above-described metal material printing equipment or the above-described metal material printing method. That is, the above printed layer is preferably formed by a printing equipment and a printing method using a laser, an LED, etc. as an exposure means.

[0051] The above printed layer can form more diverse images compared to the images formed on existing metal materials. The above printed layer has the advantages that not only are the form and hue clear compared to the images formed by existing printing methods, but also the resistance to peeling is high and the processing characteristics are excellent. Existing printing methods were carried out by roll coating and inkjet coating methods using liquid pigments and dyes. Such liquid-type methods use a mixture of color particles (about 20 - 30 wt.%) in a transparent polymer resin (about 70 - 80 wt.%). That is, since most of what constitutes the pigment or dye is a transparent polymer resin, the form and hue do not appear clearly, and when the liquid particles are large, there is a high possibility of peeling due to the stress applied to the entire polymer, resulting in low processing characteristics. In contrast, the printed layer of the present invention uses solid powder toner, and since one powder particle corresponds to a unit particle containing a hue, an excellent hue can be formed. Also, since existing printing methods use liquid pigments and dyes, they are greatly affected by the surface state of the material to be printed. For example, since the print quality is affected according to the roughness and surface shape of the material surface, prior efforts for surface pretreatment such as roughness management are required. However, the printing method using a laser, LED, etc. according to the present invention is a method in which toner powder is printed by an electrostatic adsorption and pressure bonding process, and thus can be formed more easily compared to existing methods.

[0052] On the other hand, as shown in Fig. 7(b), the printed metal material of the present invention can further include a coating layer between the above metal material and the printed layer. The above coating layer can include wet or dry plating layers such as an electrogalvanized (EG) layer and a hot-dip galvanized (GI) layer.

[0053] Furthermore, the above coating layer can include a pretreatment layer formed on the above plating layer, an intermediate coating layer formed on the above pretreatment layer, and a top coating layer formed on the above intermediate coating layer.

[0054] The above pretreatment layer, intermediate coating layer, and top coating layer are not particularly limited in the present invention and can include all those known in the technical field to which the present invention pertains. Hereinafter, a preferred example will be described.

[0055] The above pretreatment layer is for improving the bonding strength between the base metal and the intermediate coating layer (primer layer), and is usually formed to be within 1 μm, and a chromium-free polymer coating, hexavalent chromium (Cr 6+ ), trivalent chromium (Cr 3+ ) coating can be performed.

[0056] The above intermediate coating layer (primer layer) is for ensuring corrosion resistance and concealing the base layer, and is performed to be about 5 μm, and can be coated using polyester, urethane, epoxy, etc. However, the above intermediate coating layer can be omitted depending on the purpose.

[0057] The above top coating layer (top coating layer) exhibits surface physical properties and is directly related to the physical properties of the product, and is formed on the top coating layer of the above printed layer. Therefore, the above top coating layer is for the purpose of protection, hue, concealment, etc. when physically hitting the surface, and for this purpose, it can be set to a thickness level of 15 to 20 μm, and polyester, urethane, epoxy, etc. can be used.

[0058] On the other hand, the printed metal material of the present invention can further include a transparent coating layer on the printed layer as shown in FIGS. 7(c) and (d). The above transparent coating layer serves to impart gloss or protect the above printed layer. The above transparent coating layer is also not particularly limited in the present invention and can include all those known in the technical field to which the present invention pertains.

[0059] As an example, a polymer series is generally used for the above-mentioned transparent coating layer, and high molecular resins such as polyester and urethane may be used in the same way as the above topcoat layer, or a fluororesin may be used in the case of outdoor use. The above-mentioned transparent coating layer can be formed to a thickness of about 1 to 5 μm according to the application.

Explanation of symbols

[0060] 100: Metal material 101, 101’: Metal material charging means 111, 112, 113, 114: Support roll 200, 200’, 201, 202, 203, 204: Exposure means 210: Laser generator 220: Scanning mirror 300, 300’, 301, 302, 303, 304: Photosensitive drum 400, 400’, 401, 402, 403, 404: Photosensitive drum charging and discharging means 410, 410’, 411, 412, 413, 414: Photosensitive drum charging means 420, 420’, 421, 422, 423, 424: Photosensitive drum discharging means 500, 500’, 501, 502, 503, 504: Developing means 510, 510’, 511, 512, 513, 514: Phenomenon roller 520, 520’, 521, 522, 523, 524: Toner container 600, 600’, 601, 602, 603, 604: Removal means 610, 610’, 611, 612, 613, 614: Blade 620, 620’, 621, 622, 623, 624: Recovery cylinder 630: Alcohol brush 700, 700’: Fixing means 710, 710’: Fuse roll 720: Pressing roll

Claims

1. A photosensitive drum 300 that adheres to a continuously moving metal material 100 and rotates in a certain direction to transfer and fix the toner T adhering to the surface to the surface of the metal material 100; Developing means 500 provided on one side of the photosensitive drum 300 to provide the toner T on the surface of the photosensitive drum 300; Photosensitive drum charging means 410 for charging the surface of the photosensitive drum 300 before the toner T is provided; Exposure means 200 for applying light energy to the surface of the photosensitive drum 300 according to a required image between the developing means 500 and the photosensitive drum charging means 410; Metal material charging means 101 for charging the surface of the metal material 100 so that the toner T adhering to the surface of the photosensitive drum 300 is transferred to the surface of the metal material 100; Removing means 600 for removing the toner T remaining on the surface of the photosensitive drum 300 after the toner T is fixed on the surface of the metal material 100; Photosensitive drum discharging means 420 for removing the charge of the photosensitive drum 300 after removing the toner T; Fixing means 700 located at the rear end of the photosensitive drum 300 to fix the toner T fixed on the surface of the metal material 100; comprising, The fixing means 700 includes a pressure roll 720, The pressure roll 720 has a structure that can move up and down according to the thickness of the metal material 100, a metal material printing facility.

2. The metal material printing facility according to claim 1, wherein the removing means 600 includes a blade 610 and a collection cylinder 620 located at the lower end of the blade 610.

3. The metal material printing facility according to claim 2, wherein the removing means 600 further includes an alcohol brush 630 between the blade 610 and the collection cylinder 620.

4. The metal material printing facility according to claim 1, wherein the light energy is a laser or an LED.

5. When the light energy is a laser, the exposure means 200 includes a laser generator 210 and a scanning mirror 220, the metal material printing facility according to claim 4.

6. The metal material charging means 101 includes one or more and is provided at any one position of the front end, rear end, and front and rear ends of the photosensitive drum 300 based on the traveling direction of the metal material 100, the metal material printing facility according to claim 1.

7. The developing means 500 includes a toner container 520 and a developing roller 510 that supplies toner T in the toner container 520 to the photosensitive drum 300. The metal material printing facility according to claim 1.

8. The fixing means 700 includes a fused roll 710. The metal material printing facility according to claim 1.

9. Two or more of the photosensitive drum, the photosensitive drum charging means, the photosensitive drum discharging means, the exposure means, the developing means, and the removing means are provided in pairs along the traveling direction of the metal material 100. Each developing means provides toners of different hues. The metal material printing facility according to claim 1.

10. The metal material printing facility is located above and below the metal material. The metal material printing facility according to any one of claims 1 to 9.

11. A charging step of charging the surface of the photosensitive drum 300 that rotates in a certain direction. An exposure step of applying light energy to the surface of the charged photosensitive drum 300 according to the required image. A developing step of providing toner T on the surface of the photosensitive drum 300 after the exposure. A transfer step of continuously moving the toner attached to the surface of the photosensitive drum 300 and moving it to the surface of the continuously moving and charged metal material 100 for fixing. A fixing step of fixing the toner fixed on the surface of the metal material 100. A removing step of removing the toner remaining on the surface of the photosensitive drum 300 after the transfer. A discharging step of discharging the surface of the photosensitive drum 300. Including In the fixing step, a pressure roll 720 moves up and down according to the thickness of the metal material 100. A metal material printing method.

12. The fixing step is heated at 25 to 400 °C. The metal material printing method according to claim 11.

13. The fixing step further includes applying pressure. The metal material printing method according to claim 11 or 12.

14. When printing using two or more toners, two or more photosensitive drums are required in the printing method. Two or more of the charging steps, exposure steps, developing steps, transfer steps, and removing steps are performed using each photosensitive drum. The metal material printing method according to claim 11.

Images