JP6072523B2 - Method for manufacturing painted building components - Google Patents

Description

  The present invention relates to a method for producing a painted building member used as an exterior material or the like.

  2. Description of the Related Art Conventionally, a painted building member that has been decorated by inkjet painting has been proposed (see, for example, Patent Document 1). Such a painted building member is formed by painting a base material with an ink jet coater.

  As the ink jet type coating machine 7 for performing ink jet coating, for example, the one shown in FIG. 4 can be used. The ink jet type coating machine 7 includes a coating nozzle head 9 provided with a spray nozzle 8, a paint supply tank 10 for supplying ink such as water-based ink to the spray nozzle 8 of the paint nozzle head 9, and a spray nozzle 8 of the paint nozzle head 9. A coating control system 11 for controlling the ink ejection is provided. As the ink, water-based, oil-based, ultraviolet curable, and other general materials can be used.

  The coating nozzle head 9 is formed of four types of coating nozzle heads 9y, 9c, 9m, and 9k that eject inks of yellow, cyan, magenta, and black, and can perform coating by full-color printing. Similarly, the paint supply tank 10 is also composed of four types. The paint supply tank 10y for supplying yellow ink is applied to the coating nozzle head 9y, and the paint supply tank 10c for supplying cyan ink is applied to the coating nozzle head 9c. The paint supply tank 10m for supplying magenta ink is connected to the paint nozzle head 9m, and the paint supply tank 10k for supplying black ink is connected to the paint nozzle head 9k. Further, the coating nozzle head 9 is formed long and substantially parallel to a direction (width direction of the base material 3) orthogonal to the conveyance direction of the base material 3, and is installed substantially horizontally. Each coating nozzle head 9 is provided with a plurality of spray nozzles 8 arranged in the longitudinal direction. Furthermore, the coating nozzle heads 9y, 9c, 9m, and 9k are arranged substantially parallel to the conveyance direction of the base material 3.

  The coating control system 11 includes various CPUs, ROMs, RAMs, and the like, and includes a print data creation unit, a coating control unit, a spray nozzle control unit, and the like. The coating control unit takes out printing data corresponding to the base material 3 to be coated from the printing data creation unit, and outputs a control signal to the ejection nozzle control unit based on the printing data. The spray nozzle control unit is connected to each spray nozzle 8 of the coating nozzle head 9 and controls each spray nozzle 8 based on a control signal input from the spray nozzle control unit. Each of the injection nozzles 8 performs injection or stops the injection by, for example, a piezo control method, and each of the yellow, cyan, magenta, and black is controlled by controlling each of the injection nozzles 8 with an injection nozzle control unit. Ink jetting and stopping can be individually controlled to perform painting by full-color printing corresponding to the color pattern.

  Moreover, the conveyance conveyor 12 for conveying the base material 3 is arrange | positioned under the inkjet type coating machine 7, This conveyance conveyor 12 can be formed with a belt conveyor etc., for example.

  In coating the base material 3, the base material 3 is introduced onto the transport conveyor 12, and sequentially passes below the coating nozzle head 9 of the ink jet type coating machine 7, and based on the print data, the coating nozzle head 9 A painted building member can be manufactured by ejecting ink from the ejection nozzle 8 and performing inkjet printing.

JP 2012-107471 A

  However, when a base material on which the surface to be painted is three-dimensionally painted is applied with a general ink jet type coating machine, it is difficult to uniformly paint, and the appearance of the painted building member may be deteriorated. For example, when inkjet coating is applied to a substrate on which ridges are formed, it is difficult to uniformly coat the inclined surfaces (side surfaces) of the ridges.

  FIGS. 5A and 5B show a method of coating the base material 3 on which the protrusions 20 are formed. This base material 3 is formed in the rectangular plate shape by planar view. On the surface (upper surface) of the base material 3, the ridges 20 are formed long and substantially parallel to the longitudinal direction of the base material 3. The portions other than the protrusions 20 of the base material 3 are formed as flat portions 21. The protrusions 20 are formed over substantially the entire length of the base material 3 in the longitudinal direction. The top surface (upper surface) 20 a of the ridge 20 is formed on a flat surface substantially parallel to the upper surface of the flat portion 21. Further, both side surfaces 20b of the ridge 20 are formed as inclined surfaces inclined upward from the flat portion 21 toward the top surface 20a. Thus, the protrusion 20 is formed in a substantially trapezoidal cross section. In such a base material 3, the top surface 20 a of the ridge 20 and the surface of the flat portion 21 are formed as a substantially horizontal horizontal decorative surface 22, and the inclined decorative surface in which the side surface of the ridge 20 is inclined with respect to the horizontal. 23 is formed.

  When such a base material 3 is subjected to ink jet coating, when the base material 3 passes under the coating nozzle head 9 by a transport conveyor (not shown), the base 3 is ejected from the spray nozzle (not shown) of the coating nozzle head 9. Ink i such as water-based ink is ejected toward the material 3. Thereby, the ink i can adhere to the surface of the base material 3 and can be painted.

  However, in such ink jet painting, it is difficult to make the ink density equal between the horizontal decorative surface 22 and the inclined decorative surface 23. That is, the horizontal decorative surface 22, which is a surface substantially parallel to the lower surface of the coating nozzle head 9, is painted with a predetermined ink density. On the other hand, when the inclined decorative surface 23 is viewed from a direction perpendicular to the inclined decorative surface 23 (see field of view H), when the horizontal decorative surface 22 is viewed from a direction perpendicular to the horizontal decorative surface 22 (see field of view L). ) Is sparser (rougher) than the ink density.

  When ink-jet painting is performed on the base material 3 having a three-dimensional painted surface in this way, the ink density partially varies, resulting in the appearance of uneven coating, and the appearance value of the painted building member is impaired. It was sometimes. Then, the color of the surface of the base material 3 appears at a portion where the ink density is low. For example, when a white receiving layer is formed on the surface of the base material 3, the whiteness appears strongly.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a method for producing a painted building member that can reduce the variation in ink density and suppress the deterioration of the appearance.

The method for manufacturing a painted building member according to the present invention is applied to a base material having a plurality of decorative surfaces having different angles including a substantially horizontal decorative surface and a decorative surface inclined with respect to the substantially horizontal decorative surface by inkjet coating. in its had row painted against the decorative surface, the decorative surface of the inclined ink is ejected in the same size as the width dimension from the paint nozzle head located in a direction substantially perpendicular to the respective decorative surfaces, Ink is ejected on the substantially horizontal decorative surface with a size larger than its width .

In the present invention, the substrate is conveyed, the substantially prior to coating to horizontal of粧面, by performing the coating to the inclination to that of粧面are preferred.

  In this invention, it is preferable that the said base material is a protruding corner member.

  In the present invention, it is preferable that the base material is a protruding corner member, and the angle of the protruding corner member is changed with respect to the coating nozzle head.

  In the present invention, since the coating surface is applied from the coating nozzle head located in a direction substantially perpendicular to each of the decorative surfaces, the ink density on a plurality of decorative surfaces at different angles is substantially equal, and the ink density It is possible to suppress the deterioration of the appearance by reducing the variation of the above.

An example of an embodiment of the invention is shown, and (a) and (b) are schematic views. Other embodiment same as the above is shown, (a) is a front view of a substrate, and (b) is a schematic view. Other embodiment same as the above is shown, and (a) to (c) are schematic views. It is the schematic which shows an example of an inkjet type coating machine. A prior art example is shown and (a) and (b) are schematic views. Another conventional example is shown, (a) is a plan view showing a plate material, (b) is a schematic view of a substrate.

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

  As the base material 3, a ceramic base material mainly composed of cement can be used. The material of the base material 3 is not particularly limited, and materials conventionally used for building members such as wood, metal and resin can be used as they are. A receiving layer can be provided on the upper surface (surface to be coated) of the base material 3 in order to improve the fixing property and coloring property of the ink. As the ink, common materials such as water-based, oil-based, and ultraviolet curable types can be used as described above.

  1 (a) and 1 (b) show a method for coating the base material 3 on which the protrusions 20 are formed. This base material 3 is formed in the rectangular plate shape by planar view. On the surface (upper surface) of the base material 3, the ridges 20 are formed long and substantially parallel to the longitudinal direction of the base material 3. The portions other than the protrusions 20 of the base material 3 are formed as flat portions 21. The protrusions 20 are formed over substantially the entire length of the base material 3 in the longitudinal direction. The top surface (upper surface) 20 a of the ridge 20 is formed on a flat surface substantially parallel to the upper surface of the flat portion 21. Further, both side surfaces 20b of the ridge 20 are formed as inclined surfaces inclined upward from the flat portion 21 toward the top surface 20a. Thus, the protrusion 20 is formed in a substantially trapezoidal cross section. In such a base material 3, the top surface 20 a of the ridge 20 and the surface of the flat portion 21 are formed as a horizontal decorative surface 22 that is substantially horizontal, and the inclined decorative surface 23 in which the side surface of the ridge 20 is inclined with respect to the horizontal. It is formed as.

  And the base material 3 is conveyed substantially horizontally using conveyance apparatuses, such as a belt conveyor. Moreover, the base material 3 is conveyed in the direction parallel to the longitudinal direction. A coating nozzle head 9 is disposed above the substrate 3 to be conveyed. The painting nozzle head 9 is provided with a horizontal head 9 a for painting the horizontal decorative surface 22 and an inclined head 9 b for painting the inclined decorative surface 23. The horizontal head 9a and the inclined head 9b have the same ink density to be ejected and can be coated with the same ink density.

  The horizontal head 9a is formed long so as to cross the substrate 3 being conveyed. Further, the horizontal head 9a is disposed at a position substantially perpendicular to the horizontal decorative surface 22 of the substrate 3 being conveyed. The lower surface of the horizontal head 9 a is formed by a surface substantially parallel to the horizontal decorative surface 22 of the substrate 3 being conveyed. An injection nozzle (not shown) is provided on the lower surface of the horizontal head 9a at a position facing the surface of the flat portion 21 of the substrate 3 being conveyed and the top surface 20a of the ridge 20.

  The inclined head 9b is disposed at a position substantially perpendicular to the inclined decorative surface 23 of the substrate 3 being conveyed. A surface substantially parallel to the inclined decorative surface 23 of the substrate 3 being conveyed is formed on the inclined head 9b. This surface is opposed to the side surface 20b of the protrusion 20 of the substrate 3 being conveyed, and an injection nozzle (not shown) is provided on this surface. Further, the inclined head 9b is not provided with an injection nozzle at a position facing the horizontal decorative surface 22 of the base 3.

  The inclined head 9b is disposed on the upstream side of the horizontal head 9a with respect to the conveyance direction of the substrate 3. Thereby, the inclined decorative surface 23 of the base material 3 can be applied prior to the horizontal decorative surface 22. In addition, the horizontal head 9a and the inclined head 9b can be coated without interfering with each other. In FIG. 1, the distance R between the horizontal head 9a and the inclined head 9b is not particularly limited, but can be 100 to 1000 mm. This coating order is particularly effective when using ink i having excellent fixing properties (low flowability when applied to the inclined decorative surface 23), and is applied by the horizontal head 9a later to apply horizontal makeup. The side edge of the inclined decorative surface 9b of the surface 22 is neatly painted. In addition, when the fixability of the ink i used is low (the flowability when applied to the inclined decorative surface 23 is high), it is necessary to immediately form the film (curing) of the ink i by drying or ultraviolet irradiation after coating. Therefore, it is desirable that the horizontal head 9a is disposed on the upstream side of the inclined head 9b.

  And in coating the base material 3, it can carry out by conveying the base material 3 to one direction under the coating nozzle head 9. FIG. The base material 3 is first transported so as to pass below the inclined head 9b. At this time, the ink i is ejected from the inclined head 9b substantially perpendicularly to the inclined decorative surface 23, and the ink i is applied to the inclined decorative surface 23. Painted by adhering. After the inclined decorative surface 23 is painted, the base material 3 is conveyed so as to pass below the horizontal head 9a, and at this time, the ink i is ejected from the horizontal head 9a substantially perpendicular to the horizontal decorative surface 22, It is painted by the ink i adhering to the horizontal decorative surface 22. In this way, it is possible to form a flat paint building member used as an outer wall material or the like.

  The painted building member formed in this way can be applied with a substantially uniform ink density from a substantially vertical direction to each decorative surface (the horizontal decorative surface 22 and the inclined decorative surface 23). Accordingly, the ink density on the plurality of decorative surfaces having different angles becomes substantially equal, and variations in the ink density can be reduced to prevent the appearance from being deteriorated.

  In painting as described above, the ink i is ejected to the inclined decorative surface 23 in a size equivalent to the width dimension (the dimension from the flat portion 21 to the top surface 20a), and the width dimension is applied to the horizontal decorative surface 22. It is preferable that the ink i is ejected in a dimension larger than (a dimension in a direction orthogonal to the conveyance direction of the base material 3). Thereby, when the horizontal decorative surface 22 is applied after the inclined decorative surface 23 is applied, the inclined decorative surface 23 is also slightly applied (0.1 to 2.0 mm). Therefore, the boundary portion between the horizontal decorative surface 22 and the inclined decorative surface 23 is easily painted, and the boundary portion can be made inconspicuous.

  2 (a) and 2 (b) show another embodiment. In this embodiment, a corner member is manufactured as a painted building member.

  Conventionally, this type of protruding corner member is manufactured as follows. First, as shown in FIG. 6A, two rectangular parts 31 are cut out from the coated flat outer wall material 30. Next, one longitudinal end face of each component 31 is cut so as to be inclined at about 45 ° with respect to the surface. Next, the cut surfaces 32 of the components 31 are bonded to each other, and the two components 31 are arranged at approximately 90 ° and joined. Next, as shown in FIG. 6B, the outer corners of the joining portion of the two parts 31 are chamfered with a predetermined width dimension. Next, a repair paint is applied to the chamfered surface 33. In this way, a protruding corner member can be obtained.

  However, since the chamfered surface 33 of the above-described protruding corner member is usually painted with a repair paint of about 1 to 3 colors, a sense of incongruity occurs with the decorative surface of the multicolor component 31 (the outer surface of the protruding corner member). was there.

  Therefore, in the present invention, inkjet coating is performed using the protruding corner member as the base material 3. As shown in FIG. 2A, the base material 3 is formed by joining two rectangular parts 31. Also in this case, similarly to the above, two parts 31 are cut out from a flat plate material, and one long end face of each part 31 is cut so as to be inclined at about 45 ° with respect to the surface. The two parts 31 are arranged at about 90 ° and bonded together. Next, the corners on the outer side of the joining portion of the two parts 31 are chamfered with a predetermined width dimension to form a chamfered surface 33. In the base material 3, the chamfered surface 33 is formed as the horizontal decorative surface 22, and the surface of the component 31 (the outer surface of the protruding corner member) is formed as the inclined decorative surface 23. It should be noted that the plate material from which the component 31 is cut may or may not be provided with a base coating such as a receiving layer.

  Then, when such a corner member is coated as the base material 3, the base material 3 can be transported in one direction below the coating nozzle head 9 in the same manner as described above. As shown in FIG. 2B, the base material 3 is first transported so as to pass below the inclined head 9b. At this time, the ink i is substantially perpendicular to the inclined decorative surface 23 from the inclined head 9b. The ink i is sprayed and applied by the ink i adhering to the inclined decorative surface 23. After the inclined decorative surface 23 is painted, the base material 3 is conveyed so as to pass below the horizontal head 9a, and at this time, the ink i is ejected from the horizontal head 9a substantially perpendicular to the horizontal decorative surface 22, It is painted by the ink i adhering to the horizontal decorative surface 22. In this way, a painted building member having a substantially L-shaped cross section can be formed. In this embodiment as well, as described above, the ink i is ejected to the inclined decorative surface 23 with a size equivalent to the width size, and the ink i with a size larger than the width size is applied to the horizontal decorative surface 22. Is preferably ejected.

  In this embodiment, since all the outer surfaces of the protruding corner members are inkjet-painted, it is possible to reduce the difference in appearance due to the difference in the painting method and the difference in paint between the horizontal decorative surface 22 and the inclined decorative surface 23. And a uniform appearance can be obtained.

  FIG. 3 shows another embodiment. In this embodiment, similarly to the above, the protruding corner member is subjected to inkjet coating, but the coating is performed while rotating the protruding corner member.

  That is, first, as shown in FIG. 3A, the base material 3 is disposed below the coating nozzle head 9. At this time, the lower surface of the coating nozzle head 9 and the outer surface (inclined decorative surface 23) of one member 31 are opposed to each other so as to be substantially parallel. In this state, the ink i is ejected from the coating nozzle head 9 substantially perpendicularly to the outer surface (inclined decorative surface 23) of one member 31. Next, as shown in FIG. 3 (b), the base material 3 is rotated about the longitudinal direction of the base material 3, and the lower surface of the coating nozzle head 9 and the chamfered surface 33 of the base material 3 (horizontal decorative surface 22). Are opposed to each other so as to be substantially parallel. In this state, ink i is ejected from the coating nozzle head 9 substantially perpendicularly to the chamfered surface 33 (horizontal decorative surface 22). Next, as shown in FIG. 3C, the base material 3 is rotated about the longitudinal direction of the base material 3 so that the lower surface of the coating nozzle head 9 and the outer surface (inclined decorative surface 23) of the other member 31 are formed. Opposite so that they are approximately parallel. In this state, the ink i is ejected from the coating nozzle head 9 substantially perpendicularly to the outer surface (inclined decorative surface 23) of the other member 31. In this way, the substrate 3 can be coated on its outer surface while rotating, and the substrate 3 can be coated over its entire length while being sequentially conveyed in the longitudinal direction. In this embodiment as well, as described above, the ink i is ejected to the inclined decorative surface 23 with a size equivalent to the width size, and the ink i with a size larger than the width size is applied to the horizontal decorative surface 22. Is preferably ejected.

  This embodiment is effective when it is difficult to install the horizontal head 9a and the inclined head 9b in accordance with the horizontal decorative surface 22 and the inclined decorative surface 23 of the substrate 3 to be conveyed. Coating can be performed by relatively adjusting the angle with the substrate 3.

i ink 3 base material 9 coating nozzle head 22 horizontal decorative surface 23 inclined decorative surface

Claims (4)

When a substrate having a plurality of decorative surfaces having different angles including a substantially horizontal decorative surface and a decorative surface that is inclined with respect to the substantially horizontal decorative surface is coated by inkjet coating, a direction substantially perpendicular to the respective decorative surfaces There line paint for the decorative surface from paint nozzle head located, the cosmetic surface inclined ink is ejected by the size of the equivalent to their width, to the substantially horizontal decorative surface than its width A method for producing a painted building member, characterized in that ink is ejected in a large dimension . The substrate is conveyed, the substantially prior to coating to horizontal of粧面, painted building element according to claim 1, characterized in that the coating to the inclination to that of粧面Production method. The said base material is a protruding corner member, The manufacturing method of the painted building member of Claim 1 or 2 characterized by the above-mentioned. The method for manufacturing a painted building member according to any one of claims 1 to 3 , wherein the base material is a protruding corner member, and the angle of the protruding corner member is changed with respect to the coating nozzle head.

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