JP2007176686A - Painting device of construction board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a painting device of a construction board capable of paining without causing painting failure, by preventing damaging of a painting nozzle head by a warped-deformed construction board. <P>SOLUTION: This invention relates to the painting device of the construction board for painting a surface of the construction board 1 by paint injected from the painting nozzle head 3 by passing through under the painting nozzle head 3 of an ink jet type painting machine by carrying the construction board 1 by a carrier conveyor 5, and has a pressing device 7 correcting a warp by pressing both side end parts parallel to the carrying direction of the construction board 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a building board coating apparatus for coating the surface of a building board using an ink jet type coating machine.

  Conventionally, when painting building boards such as cement-based exterior boards, it is common to apply paint to the surface of building boards using a spray coater, roll coater coater, flow coater coater, etc. Is. However, with such sprays, roll coats, flow coats, etc., it is difficult to paint complex patterns, and it is particularly difficult to paint on building boards with irregularities such as bricks on the surface like exterior boards. Have difficulty. On the other hand, painting is also performed using printing rolls such as letterpress and intaglio, but in this case, the same pattern is repeatedly applied and tends to be a monotonous pattern. When changing, it is necessary to replace the printing roll, and it is not possible to paint a different pattern for each building board.

  Therefore, recently, an ink jet printer is used as a coating machine, and a building board is conveyed by a conveyor, and the building board is sprayed from the coating nozzle head while passing under the coating nozzle head of the ink jet type coating machine. It has been proposed to coat the surface of (see, for example, Patent Document 1).

Inkjet coating machines can be applied to the surface of the building board in a non-contact manner using paint sprayed from the paint nozzle head, and by controlling the spray of paint from the paint nozzle head The paint can be sprayed to an arbitrary position on the building board so as to have an arbitrary pattern, and the building board having irregularities on the surface can be coated with a complicated pattern. In particular, the control of spraying paint from the painting nozzle head can be set for each building board supplied to the ink jet coating machine, so that it is possible to paint a different pattern for each building board. is there.
JP 2005-74666 A

  As described above, when coating is performed on the surface of a building board by spraying paint from the coating nozzle head of an ink jet type coating machine, the lower surface of the coating nozzle head faces the surface of the building board close to the surface of the building board at an interval of several millimeters. is doing.

  On the other hand, as a building board, a ceramic board made by making a slurry in which a hydraulic material such as cement or a reinforcing fiber is dispersed in water and making it into a plate shape and curing and curing the board is generally used. However, in the building board produced through the curing and curing process as described above, warp deformation may occur during curing and curing.

  Then, when the building board with warpage deformation is supplied to the coating nozzle head by the conveyor, the warped and deformed building board is sent in a state of being lifted from the upper surface of the conveyor, and this lifting of the building board There was a problem that the damaged portion collided with the coating nozzle head and could damage the coating nozzle head. In addition, if the building board is warped, the clearance between the coating nozzle head and the upper surface of the building board is not constant due to the warping deformation, and the adhesion state of the paint sprayed from the coating nozzle head changes. There is also a problem that coating failure may occur such as unclear painting.

  The present invention has been made in view of the above points, and can prevent the coating nozzle head from being damaged by the warped and deformed building board and can perform the coating without causing a coating failure. An object of the present invention is to provide a plate coating apparatus.

  The building board coating apparatus according to claim 1 of the present invention is jetted from the coating nozzle head 3 by transporting the building board 1 by the conveyor 5 and passing below the coating nozzle head 3 of the ink jet type coating machine 2. In the building board coating apparatus in which the surface of the building board 1 is coated with the paint to be applied, the pressing apparatus 7 is provided for pressing the both side ends parallel to the conveying direction of the building board 1 to correct the warp. It is characterized by.

  The invention of claim 2 is characterized in that, in claim 1, the pressing device 7 is formed by including a presser roll 8 that presses the building board 1 while rolling as the building board 1 is conveyed. Is.

  The invention of claim 3 is characterized in that, in claim 1, the pressing device 7 is formed by including a presser plate 9 that presses the building board 1 while being in sliding contact with the conveyance of the building board 1. It is.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the pressing device 7 is provided at a front position where the building board 1 is fed into the coating nozzle head 3.

  The invention of claim 5 is characterized in that, in any one of claims 1 to 4, both end portions of the building board 1 pressed by the pressing device 7 are parts that are cut and removed in a post-coating process. Is.

  According to the present invention, the building board 1 can be sent to the coating nozzle head 3 in a state in which the building board 1 is pressed by the pressing device 7 to correct the warp, and the warped and deformed building board 1 collides with the coating nozzle head 3. The coating nozzle head 3 can be prevented from being damaged, and the clearance between the coating nozzle head 3 and the building board 1 is kept constant, and the adhesion state of the paint sprayed from the coating nozzle head 3 is maintained. It can be stabilized and can prevent the occurrence of poor coating. Moreover, since both sides of the building board 1 are pressed by the pressing device 7 so as to correct the warping of the building board 1, the warping can be effectively prevented when the building board 1 is warped in the width direction. It can be pressed and corrected.

  Hereinafter, the best mode for carrying out the present invention will be described.

  As shown in FIG. 2A, the coating apparatus includes a coating nozzle head 3 provided with an injection nozzle 4, a paint supply tank 11 that supplies paint to the injection nozzle 4 of the coating nozzle head 3, and a coating nozzle head 3. The inkjet coating machine 2 provided with the coating control system 12 for controlling the spraying of the paint from the spray nozzle 4 and the transport conveyor 5 for transporting the building board 1 are formed. The conveyor 5 is arranged below the ink jet type coater 2, from the front position where the building board 1 is introduced into the ink jet type coater 2, the position directly below the ink jet type coater 2, and the ink jet type coater 2. To the rear position where the building board 1 is led out.

  The coating nozzle head 3 is provided at the lower end of the ink jet coating machine 2. The coating nozzle head 3 is formed as a long line head in a direction perpendicular to the feeding direction of the building board 1 and is arranged so as to cross the conveyor 5 as shown in FIG. A plurality (for example, 30) of single nozzle heads 16 are arranged on the lower surface of the coating nozzle head 3 in a line in the longitudinal direction of the coating nozzle head 3 as shown in FIG. The single nozzle head 16 is formed in a rectangular shape on the bottom surface, and a large number of injection nozzles 4 are formed on the bottom surface of the single nozzle head 16. The spray nozzles 4 are arranged in the longitudinal direction of the single nozzle head 16 at a predetermined constant interval. In the embodiment of FIG. 4, the spray nozzles 4 are provided in four rows on the single nozzle head 16. By attaching a plurality of single nozzle heads 16 provided with the spray nozzles 4 to the coating nozzle head 3 in the longitudinal direction, a large number of spray nozzles 4 are arranged in the longitudinal direction of the coating nozzle head 3. 3 can be provided. Here, the single nozzle head 16 is attached to the coating nozzle head 3 with its longitudinal direction inclined at a predetermined angle with respect to the feeding direction of the building board 1. By tilting the single nozzle head 16 in this manner, the single nozzle head 16 is inclined. The pitch of the adjacent injection nozzles 4 in the direction perpendicular to the feeding direction of the building board 1 (the width direction of the building board 1) is reduced so that coating can be performed with high density dpi.

  In this embodiment, the coating nozzle head 3 is formed of four types of coating nozzle heads 3y, 3c, 3m, and 3k that eject paints of yellow, cyan, magenta, and black, and performs painting by full-color printing. I can do it. Similarly, the paint supply tank 11 is also composed of four types. The paint supply tank 11y for supplying yellow paint is applied to the coating nozzle head 3y, and the paint supply tank 11c for supplying cyan paint is applied to the coating nozzle head 3c. The paint supply tank 11m for supplying magenta paint is connected to the paint nozzle head 3m, and the paint supply tank 11k for supplying black paint is connected to the paint nozzle head 3k. The coating nozzle heads 3y, 3c, 3m, and 3k are arranged along the conveying direction of the building board 1.

  The painting control system 12 includes various CPUs, ROMs, RAMs, and the like, and includes a painting data creation unit, a painting control unit, an injection nozzle control unit, and the like. The painting data creation unit inputs and stores the color pattern data obtained by scanning the original image with a scanner or the like, and the painting control unit paints the color pattern data corresponding to the building board 1 to be painted. A control signal is output from the data creation unit to the ejection nozzle control unit based on the color pattern data. The spray nozzle control unit is connected to each spray nozzle 4 of the coating nozzle heads 3y, 3c, 3m, and 3k, and controls each spray nozzle 4 based on a control signal input from the spray nozzle control unit. . Each injection nozzle 4 is controlled to be controlled by, for example, a piezo control method or a method of controlling the photothermal conversion element by irradiating a laser, and the injection nozzle control unit controls each injection nozzle 4. Thus, the spraying and stopping of the respective paints of yellow, cyan, magenta, and black can be individually controlled to perform painting by full color printing corresponding to the color pattern.

  The conveyor 5 is formed by suspending a conveyor belt 19 such as a timing belt between a pair of drive rolls 18, and a pressing device 7 is provided on the conveyor 5. As shown in FIG. 1, the pressing device 7 is arranged at a position immediately before the building board 1 is fed into the coating nozzle head 3 by the conveyor 5. When a plurality of types of coating nozzle heads 3y, 3c, 3m, and 3k are arranged as the coating nozzle head 3 along the transport conveyor 5, the coating nozzle head 3 is positioned immediately before the coating nozzle head 3y located at the end on the side where the building board 1 is fed. A pressing device 7 is arranged.

  In the embodiment of FIG. 1, the pressing device 7 is formed of a rotating shaft 21 that is arranged in a direction perpendicularly crossing the conveyor 5 and a pair of presser rolls 8 provided at a plurality of locations of the rotating shaft 21. The lower end of the presser roll 8 is opposed to the upper surface of the transport conveyor 5 through an interval smaller than the thickness of the building board 1. The presser roll 8 can be freely rotated around the rotating shaft 21, and the presser roll 8 is formed of a highly durable resin such as polyamide such as MC nylon (trademark of Nippon Polybenco) or a fluorine resin. Is preferred. The rotating shaft 21 is movable up and down, and an elastic member (not shown) such as a spring is applied with a force to elastically press downward as shown by an arrow in FIG. The pair of presser rolls 8 of the pressing device 7 are provided on the rotary shaft 21 in accordance with the positions of both side ends of the building board 1 that is transported on the transport belt 5.

  Therefore, when coating the surface of the ceramic building board 1 such as a cement-based board with the coating apparatus formed as described above, the building board 1 is introduced into the conveyor 5 with its coating surface up, The building board 1 is fed below the coating nozzle head 3 of the ink jet coating machine 2 by the conveyor 5. The building board 1 passes under the pressing device 7 immediately before being fed into the coating nozzle head 3, and both end portions of the building board 1 pass under the presser rolls 8 as shown in FIG. Then, both end portions of the building board 1 are pressed downward by the presser roll 8. At this time, as shown in FIG. 5 (a), even if the building board 1 has a concave warping deformation in which the upper surface is concave in the width direction, the pair of presser rolls 8 press both end portions of the building board 1 to build the building board. By pressing 1 against the upper surface of the conveyor 5, the warping of the building board 1 can be corrected and leveled as shown in FIG.

  Thus, the building board 1 can be sent by the conveyor 5 in a state in which the warp deformation is corrected by the pressing device 7, and can be passed under the coating nozzle heads 3y, 3c, 3m, 3k of the ink jet coating machine 2 in order. The building board 1 is applied to the surface of the building board 1 by spraying paint from the coating nozzle heads 3y, 3c, 3m, 3k while feeding the building board 1 by the conveyor 5 in this way. Can be painted. The building board 1 painted in this way is sent to the terminal portion of the conveyor 5 and is carried out to the next process.

  Here, as described above, the building board 1 is allowed to pass under the coating nozzle head 3 in a state in which the warping deformation is corrected by the pressing device 7, so that the warped and deformed building board 1 collides with the coating nozzle head 3. This can prevent the coating nozzle head 3 from being damaged. Further, by correcting the warp deformation of the building board 1, the clearance between the coating nozzle head 3 and the building board 1 can be kept constant, and the state of adhesion of the paint ejected from the coating nozzle head 3 Can be stabilized, and the stability of the appearance of the coating can be improved.

  FIG. 6 shows another embodiment of the present invention, in which the pressing device 7 includes a plurality of parallel support shafts 23 and a plurality of support shafts 23 arranged in a direction perpendicularly crossing the conveyor 5. It is formed from a pair of presser plates 9 that are attached in the middle and are long in the direction parallel to the transport direction of the transport conveyor 5. The presser plate 9 has a lower end opposed to the upper surface of the conveyer 5 with a gap smaller than the thickness of the building board 1. The presser plate 9 is made of polyamide such as MC nylon (trademark of Nippon Polybenco Co., Ltd.) or fluorine resin. It is preferable to form the presser plate 9 with a durable resin. Further, the support shaft 23 is movable up and down, and an elastic member (not shown) such as a spring applies a force to elastically press downward as shown by an arrow in FIG. 6B. The pair of presser plates 9 are provided on the support shaft 23 in accordance with the positions of both end portions of the building board 1 conveyed on the conveyor belt 5.

  Using the pressing device 7 thus formed, the warp deformation of the building board 1 can be corrected in the same manner as described above. That is, when the building board 1 passes under the pressing device 7 immediately before the building board 1 is sent to the coating nozzle head 3 of the ink jet type coating machine 2 by the transport conveyor 5, as shown in FIG. Both end portions of the building board 1 pass below the presser plates 9, and both end portions of the building board 1 are pressed downward by the presser plates 9. At this time, the front end portion (the end portion opposite to the coating nozzle head 3) of the presser plate 9 is formed on the inclined surface 24 inclined obliquely upward so that the presser plate 9 can easily ride on the upper surface of the building board 1. It is. And even if the building board 1 is warped and deformed as shown in FIG. 5 described above, by pressing the both ends of the building board 1 with the holding plate 9 and pressing the building board 1 against the upper surface of the conveyor 5 The warping of the building board 1 can be corrected and leveled. Accordingly, in the same manner as described above, it is possible to prevent the coating nozzle head 3 from being damaged by preventing the warped and deformed building board 1 from colliding with the coating nozzle head 3. The clearance with the building board 1 can be maintained constant, the adhesion state of the paint ejected from the painting nozzle head 3 can be stabilized, and the stability of the paint appearance can be enhanced. Here, since the presser plate 9 comes into sliding contact with and rubs against the surface of the building board 1, by forming the presser board 9 with a highly durable resin, the building board 1 can be made difficult to be damaged, The wear resistance of the presser plate 9 can be improved and the life can be extended.

  As described above, in the present invention, both side ends of the building board 1 are pressed by the pressing device 7 so as to correct the warping of the building board 1, and thus the building board 1 is particularly warped in the width direction. In this case, both end portions of the building board 1 can be pressed and leveled, and the warp can be effectively corrected. Further, since the pressing device 7 is provided at a front position where the building board 1 is fed into the coating nozzle head 3, the pressing roll 8 and the pressing plate 9 of the pressing device 7 are positioned before the coating material is jetted from the coating nozzle head 3. It presses the building board 1, and the roll 8 and the presser plate 9 do not come into contact with the paint applied to the building board 1, and the coating of the building board 1 is damaged or the presser roll 8 and the presser board 9 are not touched. The paint does not adhere to the surface.

  Here, the building board 1 is often subjected to actual processing by cutting both side ends after the coating process as described above (the cut portion is shown by a chain line in FIGS. 1B and 6B). ). And if the both ends of the building board 1, which is the part to be cut and removed, are pressed by the pressing roll 8 and the pressing plate 9 of the pressing device 7 as described above, when the pressing by the pressing roll 8 and the pressing plate 9 is performed. Even if the surface of the building board 1 is scratched, the scratched portion is excised, so that the quality of the product can be prevented from being affected. Further, it is not necessary to perform coating on both end portions of the building board 1 to be cut and removed, and no paint is sprayed from the coating nozzle head 3 to both end portions of the building board 1. Therefore, in this case, the pressing device 7 can be provided not only at the front position where the building board 1 is fed into the coating nozzle head 3 but also at the rear position, so that the building board 1 can be pressed before and after the coating nozzle head 3. It is possible to pass under the coating nozzle head 3 in a state where the warped state is reliably held.

BRIEF DESCRIPTION OF THE DRAWINGS An example of embodiment of this invention is shown, (a) is a partial front view, (b) is a partial perspective view. BRIEF DESCRIPTION OF THE DRAWINGS The schematic structure of the coating apparatus of this invention is shown, (a) is a front view, (b) is a top view. It is the bottom view to which the coating nozzle head same as the above was expanded. It is the bottom view to which the single nozzle head same as the above was expanded. The correction of the warping of the building board by the pressing device is shown, and (a) and (b) are schematic views, respectively. An example of other embodiment of this invention is shown, (a) is a partial front view, (b) is a partial perspective view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building board 2 Inkjet coating machine 3 Coating nozzle head 4 Injection nozzle 5 Conveyor 7 Pressing device 8 Pressing roll 9 Pressing plate

Claims (5)

  In a building board coating device that coats the surface of a building board with the paint sprayed from the coating nozzle head by transporting the building board with a conveyor and passing under the coating nozzle head of the ink jet coating machine. A building board coating apparatus comprising a pressing device that presses both side ends parallel to the conveying direction of the building board to correct warpage.   The building board coating apparatus according to claim 1, wherein the pressing apparatus is formed with a presser roll that presses the building board while rolling as the building board is conveyed.   2. The building board coating apparatus according to claim 1, wherein the pressing device is formed by including a pressing plate that presses the building board while being in sliding contact with conveyance of the building board.   The building board coating apparatus according to any one of claims 1 to 3, wherein the pressing apparatus is provided at a front position where the building board is fed into the coating nozzle head. 5. The building board coating apparatus according to claim 1, wherein both end portions of the building board pressed by the pressing device are cut and removed in a post-coating process.

Images