JP4866047B2 - Building board painting equipment - Google Patents

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 a complex pattern, especially to a building board with irregular irregularities such as an exterior board. . 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, which tends to be a monotonous pattern and the pattern to be painted. 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, it has been proposed to paint the surface of a building board by using an ink jet printer as a coating machine and spraying the paint from the nozzle of the ink jet type coating machine while feeding the building board (for example, Patent Documents). 1 etc.).

Ink-jet coating machines can be used to paint on the surface of the building board in a non-contact manner with the paint ejected from the nozzle, and by controlling the jet of paint from the nozzle, The paint can be ejected so as to have an arbitrary pattern at an arbitrary position, and a building board having irregularities on the surface can be coated with a complicated pattern. In particular, since the control for ejecting the paint from the nozzle can be set for each building board supplied to the ink jet type coating machine, a different pattern can be painted for each building board.
JP 2005-74666 A

  As described above, when a building board is painted using an ink jet coating machine, this painting process is generally incorporated as a part of a factory line. For example, if the building board is a cement-based exterior board, a cement slurry is made to produce a green sheet, the green sheet is pressed to form a concavo-convex pattern on the surface, and then cured by autoclaving and then cured. The cut plate is cut to a predetermined size, and further cut to perform actual processing for connection, followed by coating. Accordingly, dust and the like are likely to be generated in the factory through cutting and cutting processes, and the factory is likely to be hot and humid in the paper making process and the curing process.

  For this reason, dust adheres to the painted surface of the building board, resulting in poor coating, failure of the ink jet coating machine due to the effects of high temperature and high humidity, and the paint in the nozzle due to the effects of high temperature. There was a problem that various troubles such as curing and nozzle clogging may occur.

  This invention is made in view of said point, and it aims at providing the coating apparatus of the building board which can perform coating stably, without being influenced by dust, high temperature, and high humidity. Is.

The building board coating apparatus according to claim 1 of the present invention is configured to coat the surface of the building board 1 by spraying the paint from the spray nozzle 3 of the ink jet type coating machine 2 while feeding the building board 1. It is a building board coating apparatus, in which an inkjet coating machine 2 is installed in a clean room 4, an introduction port 5 for introducing the building board 1 into the clean room 4, and the painted building board 1 in the clean room 4. The lead-out port 6 led out from each is provided, and the air curtain nozzle 7 for discharging air in a direction crossing the opening is provided in at least the lead-in port 5 out of the lead-in port 5 and the lead-out port 6 . The air curtain nozzle 7 is attached to the outer surface of the side wall of the clean room 4 and is formed as an elongated nozzle along the width direction of the inlet port 5 or outlet port 6. The air supplied from the blower 22 connected to the blower 22 is discharged from the air outlet 21 so as to cross the opening of the inlet 5 or outlet 6. is there. Further, a roller conveyor 18 formed by arranging a number of rollers 27 in a line at the front position where the building board 1 is introduced is arranged in the clean room 4, and the front position where the building board 1 is introduced following the roller conveyor 18. The belt conveyor 19 is arranged in two rows in the clean room 4 from the position immediately below the jet nozzle 3 to the rear position where the building board 1 is led out, and one end of each roller 27 is on the front side in the conveying direction of the building board 1 The other end portion is inclined so that it is located on the rear side, and protrudes upward from the roller 27 to the position of the end portion on the side where the roller 27 is inclined rearwardly and the position of the central portion in the longitudinal direction of the roller 27. erected positioning pins 28 of the roller conveyor 18 for positioning in the width direction of the positioning pin 28 disposed in a central portion of the roller 27 up and down so retracted downward And capable, in a between the sides and the adjacent belt conveyor 19 of the belt conveyor 19 which is an extension of the arrangement of the positioning pin 28 of the roller conveyor 18, the positioning pins of the belt conveyor 19 projecting from the belt conveyor 19 upwardly 29, the positioning pin 29 disposed between the adjacent belt conveyors 19 can be moved up and down so as to be retracted downward, and is positioned at a side position opposite to the positioning pins 29 of the belt conveyor 19. A pusher 30 for positioning the building board 1 in the width direction is provided by pressing one side edge of the building board 1 and pressing the other side edge of the building board 1 against the positioning pin 29 of the belt conveyor 19. 4 is provided with a temperature adjusting device 8 that adjusts the temperature inside.

  According to this invention, the inkjet coating machine 2 can be shut off from the atmosphere in the factory in the clean room 4, and can be stably coated without being affected by dust, high temperature and high humidity. .

Further , according to the present invention, the air curtain can prevent dust and the like from entering the clean room 4 from the inlet 5 through which the dust and the like easily enter together with the building board 1 and keep the clean room 4 in a clean state. be able to.

Furthermore , according to the present invention, it is possible to perform coating while maintaining a constant temperature without being affected by ambient temperature or seasonal temperature change.

  According to the present invention, the inkjet coating machine 2 can be cut off from the atmosphere in the factory in the clean room 4 and can be stably coated without being affected by dust, high temperature and high humidity. It is something that can be done.

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

  As shown schematically in FIG. 3, the inkjet type coating machine 2 includes a coating head 10 provided with an injection nozzle 3, a paint supply tank 11 for supplying paint to the injection nozzle 3 of the coating head 10, and a paint from the injection nozzle 3. The coating machine main body 13 provided with the coating control system 12 for controlling the jetting of the gas and the feeder 14 for conveying the building board 1 are formed.

  The coating head 10 is formed of four types of coating heads 10c, 10m, 10y, and 10k that eject paints of cyan, magenta, yellow, and black, so that full-color printing can be performed. Similarly, the paint supply tank 11 is composed of four types. The paint supply tank 11c that supplies cyan paint is applied to the coating head 10c, the paint supply tank 11m that supplies magenta paint is applied to the coating head 10m, and yellow. The paint supply tank 11y for supplying the paint is connected to the paint head 10y, and the paint supply tank 11k for supplying the black paint is connected to the paint head 10k. The spray nozzle 3 is provided to be opened on the lower surface of each coating head 10c, 10m, 10y, 10k, and each coating head 10c, 10m, 10y, 10k is fixed to the lower surface of the coating machine body 13.

  And as shown in FIG. 2, each coating head 10c, 10m, 10y, 10k is arranged along the conveyance direction of the building board 1, and each coating head 10c, 10m, 10y, 10k is the feeding direction of the building board 1, and It is formed as a line head that is long in the vertical direction. Each of these coating heads 10 is provided with a plurality (for example, 30) of single heads 16 arranged in a line in the longitudinal direction of the coating head 10 as shown in FIG. The single head 16 is formed in a rectangular shape on the bottom surface, and a large number of jet nozzles 3 are formed on the bottom surface of the single head 16. The injection nozzles 3 are arranged in the longitudinal direction of the single head 16 at predetermined constant intervals. In the embodiment shown in FIG. 6, the injection nozzles 3 are provided in four rows on the single head 16. By attaching a plurality of single heads 16 provided with the spray nozzles 3 to the coating head 10 in the longitudinal direction in this way, a large number of spray nozzles 3 are provided in the coating head 10 so as to be arranged in the longitudinal direction of the coating head 10. It is something that can be done. Here, the single head 16 is attached to the coating head 10 with its longitudinal direction inclined at a predetermined angle with respect to the feeding direction of the building board 1. The pitch of the adjacent injection nozzles 3 in the direction perpendicular to the feed direction (the width direction of the building board 1) is made small so that coating can be performed with high dpi.

  In the embodiment of FIGS. 1 and 2, the coating heads 10c, 10m, 10y, and 10k are set as one set, and the two sets of coating heads 10c, 10m, 10y, and 10k are arranged in two rows in parallel. Yes, one of the two sets of painting heads 10c, 10m, 10y, 10k is used to paint a narrow building board 1, and two sets of painting heads 10c, 10m, 10y, 10k are used to produce a wide range of building boards 1. It can be painted.

  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 controller is connected to each spray nozzle 3 of the coating heads 10c, 10m, 10y, and 10k, and controls each spray nozzle 3 based on a control signal input from the spray nozzle controller. Each of the spray nozzles 3 is opened and closed by, for example, a piezo control method, and the spray nozzle control unit controls the opening and closing of each of the spray nozzles 3 to eject the paints of cyan, magenta, yellow, and black. It is possible to perform painting by full color printing corresponding to the color pattern by individually controlling the stop and stop.

  The feeder 14 is disposed on the lower side of the coating machine main body 13 and is formed of a roller conveyor 18 and a belt conveyor 19 as shown in FIGS. The roller conveyor 18 is disposed at a front position where the building board 1 of the coating machine body 13 is introduced, and the belt conveyor 19 is applied from the front position where the building board 1 of the coating machine body 13 is introduced following the roller conveyor 18. It is arranged over the position directly under the machine main body 13 and the rear position where the building board 1 of the coating machine main body 13 is led out.

  The roller conveyor 18 is formed by arranging a large number of rollers 27 as shown in FIG. 2, and the rollers 27 are formed to have a length extending over two rows of coating heads 10c, 10m, 10y, and 10k. Is. Each roller 27 is inclined such that one end is located on the front side and the other end is located on the rear side with respect to the direction in which the building board 1 is conveyed. Positioning pins 28 projecting upward from the roller 27 are provided upright at the end position on the inclined side and the central position in the longitudinal direction of the roller 27. The positioning pin 28 arranged at the center of the roller 27 is moved up and down so as to be retracted below the roller 27 when painting the wide building board 1. By inclining the roll 27 in this way, the building board 1 conveyed on the roller conveyor 18 will be sent while abutting the positioning pins 28 by the inclination of the roller 27, and in the width direction of the building board 1. Positioning can be performed.

  The belt conveyor 19 is provided in two rows corresponding to each of the two sets of coating heads 10c, 10m, 10y, and 10k. A plurality of positioning pins 29 projecting upward from the belt conveyor 19 are erected along the side portions of the belt conveyors 19 on the extended line of the pins 28. The positioning pins 29 arranged between the adjacent belt conveyors 19 are moved up and down so as to be retracted below the belt conveyor 19 when painting the wide building board 1. In addition, a pusher 30 formed with a cylinder device or the like is provided on the upper side of the belt conveyor 19 at the side position opposite to the positioning pin 29 of each belt conveyor 19. Then, when the building board 1 is transported from the roller conveyor 18 onto the belt conveyor 19, the pusher 30 pushes one side end of the building board 1 to place the other side end of the building board 1 on the positioning pin 29. So that the building board 1 is positioned accurately in the width direction.

  The ink jet coating machine 2 formed as described above is installed in a clean room 4 provided in a factory. Although the clean room 4 is formed as a sealed space, the inlet 5 corresponds to a part of one side wall of the clean room 4 at a position corresponding to the end of the feeder 14 on the introduction side, and corresponds to the end of the feeder 14 on the outlet side. The outlet 6 is provided in a part of the other side wall of the clean room 4 so as to open at each position. The inlet port 5 and the outlet port 6 are formed as horizontally long slot-shaped openings.

  Air curtain nozzles 7 are respectively attached to the upper surfaces of the inlet 5 and outlet 6 on the outer surface of the side wall of the clean room 4. As shown in FIG. 4, the air curtain nozzle 7 is formed as an elongated nozzle along the width direction of the inlet 5 and outlet 6, and an air outlet 21 is provided on the entire length of the lower surface thereof. Each air curtain nozzle 7 of the inlet 5 and outlet 6 is connected to the blower 22 so that air supplied from the blower 22 is discharged from the air outlet 21. Air is discharged across the openings of the inlet 5 and outlet 6 and this air curtain can prevent dust and the like from entering the clean room from the inlet 5 and outlet 6. . Here, the opening width of the air blowing port 21 of the air curtain nozzle 7 can be adjusted between about 1 to 5 mm, and the air blowing speed can be adjusted between about 0.4 to 1 m / second by adjusting the opening width. It can be adjusted with. It should be noted that dust or the like easily enters from the introduction port 5 as the building board 1 is introduced. Therefore, at least the introduction port 5 needs to be provided with an air curtain nozzle 7, but dust or the like enters from the outlet port 6. Therefore, it is not always necessary to provide the air curtain nozzle 7 at the outlet 6.

  A temperature adjusting device 8 is connected to the clean room 4 so that air adjusted to a predetermined temperature is supplied into the clean room 4 by a fan. This temperature adjustment device 8 is configured to feedback control the temperature of air supplied to the clean room 4 according to the temperature in the clean room 4 detected by the temperature sensor, and adjust the temperature in the clean room 4 to a predetermined temperature. It can be kept.

  Thus, when painting the surface of the ceramic building board 1 such as a cement board, first, the building board 1 carried in by the carry-in conveyor 24 or the like is introduced into the clean room 4 from the introduction port 5. The building board 1 introduced into the clean room 4 is positioned as described above on the roller conveyor 18 of the feeder 14, and further positioned as described above on the belt conveyor 19, and then the belt conveyor 19. And passes under the coating machine main body 13 of the inkjet type coating machine 2. And while sending the building board 1 with the belt conveyor 19, the surface of the building board 1 can be painted by spraying a coating material from the spray nozzle 3 of the inkjet coating machine 2 on the surface of the building board 1 as described above. Is. The building board 1 coated in this way is sent to the end portion of the belt conveyor 19 and is led out from the clean room 4 through the outlet 6 and can be carried out to the next process by the carry-out conveyor 25. .

  When painting the building board 1 in the clean room 4 as described above, the clean room 4 is a space that is cut off from the factory atmosphere, so that dust in the factory may adhere to the painted surface of the building board 1. It is possible to prevent the occurrence of paint defects, and the inkjet coating machine 2 may fail due to the high temperature and high humidity in the factory, and the injection nozzle may be affected by the high temperature in the factory. It is possible to prevent troubles such as the paint in 3 being hardened and causing nozzle clogging.

  In particular, since the air curtain nozzle 7 forms an air curtain at the inlet 5 and outlet 6 of the clean room 4, dust is introduced into the inlet 5 and outlet when the building board 1 is introduced or led out. 6 can be prevented from entering the clean room 4, and mist generated at the time of spraying the paint can be prevented from scattering from the inlet 5 and outlet 6.

  Furthermore, since the temperature in the clean room 4 can be adjusted and maintained at a predetermined constant temperature by the temperature adjusting device 8, the temperature can be kept constant without being affected by the ambient temperature or seasonal temperature change. It can be applied under conditions, and can be applied with stable quality.

It is front sectional drawing which shows an example of embodiment of this invention. It is a plane sectional view same as the above. It is a figure which shows schematic structure of an inkjet type coating machine same as the above. It is a perspective view which shows the part of an air curtain nozzle same as the above. It is the expanded bottom view of the coating head same as the above. It is the further expanded bottom view of the single head same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Construction board 2 Inkjet coating machine 3 Injection nozzle 4 Clean room 5 Inlet 6 Outlet 7 Air curtain nozzle 8 Temperature control device
18 Roller conveyor
19 Belt conveyor
27 Roller
28 Roller conveyor positioning pins
29 Belt conveyor positioning pins
30 pushers

Claims (1)

A building board coating device that paints the surface of the building board by spraying the paint from the jet nozzle of the ink jet type coating machine while feeding the building board. The inkjet coating machine is installed in a clean room. In this clean room, there are an inlet for introducing the building board into the clean room and a outlet for leading the painted building board out of the clean room, and an air curtain nozzle that discharges air in the direction across the opening is introduced and outlet. Provided at least at the inlet ,
The air curtain nozzle is attached to the outer surface of the side wall of the clean room, and is formed as an elongated nozzle along the width direction of the inlet or outlet, and an air outlet is provided on the entire length of the lower surface of the nozzle, which is connected to the blower. The air supplied from the blower is discharged from the air outlet so as to cross the opening of the inlet or outlet.
A roller conveyor formed by arranging a large number of rollers in a front position where a building board is introduced is arranged in a clean room, and the position immediately below the injection nozzle and the building from the front position where the building board is introduced following this roller conveyor. The belt conveyor is arranged in two rows in the clean room over the rear position where the board is led out, and each roller is inclined so that one end is on the front side and the other end is on the rear side with respect to the conveying direction of the building board A roller conveyor positioning pin that protrudes above the roller and positions in the width direction of the building board at the position of the end of the roller that tilts backward and the position of the central portion in the longitudinal direction of the roller. positioning pins disposed at the center portion of the roller is assumed vertically movable to retract downwards, which is an extension of the arrangement of the positioning pin of the roller conveyor In a between the sides and the adjacent conveyor belt conveyers, erected positioning pins of the belt conveyor projecting from the belt conveyor upward, the positioning pins disposed between adjacent belt conveyor vertically to retract downwards It shall be movable, and at one side position opposite to the positioning pin of the belt conveyor, press one side edge of the building board and press the other side edge of the building board against the positioning pin of the belt conveyor. A building board coating apparatus comprising a temperature adjusting device for adjusting a temperature in a clean room provided with a pusher for positioning the board in the width direction.

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