JP6208954B2 - 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. 3 can be used. The ink jet type coating machine 7 includes a coating nozzle head 9 provided with an injection nozzle 8, a paint supply tank 10 for supplying aqueous ink to the injection nozzle 8 of the coating nozzle head 9, and an aqueous ink from the injection nozzle 8 of the coating nozzle head 9. A coating control system 11 for controlling the injection of the ink 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 yellow, cyan, magenta, and black color water-based inks, 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 that supplies yellow aqueous ink is applied to the coating nozzle head 9y, and the paint supply tank 10c that supplies cyan aqueous ink is applied to the coating nozzle head. 9c, the paint supply tank 10m for supplying magenta water-based ink is connected to the coating nozzle head 9m, and the paint supply tank 10k for supplying black water-based ink is connected to the coating 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. It is possible to perform coating by full color printing corresponding to the color pattern by individually controlling the ejection and stop of the water-based ink.

  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 jetting water-based ink from the jet 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 having a surface to be coated formed with an uneven surface, it has been difficult to uniformly coat the inclined surface.

  4 (a) and 4 (b) show a part of the base material 3 on which the surface to be coated is formed as an uneven surface. This base material 3 is formed in the rectangular plate shape by planar view. The surface (upper surface) of the substrate 3 is composed of a flat surface 30 and an inclined surface 31. The flat surface 30 includes high flat surfaces 30a and 30b and a low flat surface 30c. The high flat surfaces 30a and 30b are formed at positions closer to the upper surface side of the substrate 3 than the low flat surface 30c. One highly flat surface 30a is formed in front of the other highly flat surface 30b. The high flat surfaces 30a and 30b and the low flat surface 30c are formed with substantially the same area.

  Here, the front-rear direction of the base material 3 is determined by the transport direction (indicated by the arrow X) when the base material 3 is coated. That is, the same direction as the conveyance direction of the base material 3 at the time of coating is “front” or “front side”, and the direction opposite to the conveyance direction is “rear side” or “rear side”.

  The inclined surface 31 is formed between the high flat surfaces 30a and 30b and the low flat surface 30c. Further, the inclined surface 31 is formed long in a direction orthogonal to the longitudinal direction of the substrate 3. The inclined surface 31 includes a relief slope 31a and a receiving slope 31b. The escape slope 31 a is formed between a high flat surface 30 a and a low flat surface 30 c formed on the front side of the base material 3. The escape slope 31 a is formed so as to incline upward toward the front side of the substrate 3. The receiving inclined surface 31b is formed between the high flat surface 30b and the low flat surface 30c formed on the rear side of the substrate 3. The receiving inclined surface 31 b is formed so as to incline upward toward the rear side of the base material 3. The escape slope 31a and the receiving slope 31b are formed with substantially the same area. The escape slope 31a and the receiving slope 31b may be formed at different inclination angles, and in this case, the areas are also different.

  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 coating, it is difficult to equalize the ink density on the flat surface 30, the escape slope 31a, and the receiving slope 31b. Inkjet painting is performed in a non-contact manner by ejecting ink i onto the substrate 3, so that there is a time lag from when the ink i is ejected from the painting nozzle head 9 until it reaches the surface to be coated of the substrate 3. Will occur. When the surface of the base material 3 to be coated is an uneven surface, the time until the ink i reaches the surface of the base material 3 to be painted is from the coating nozzle head 9 to the surface of the base material 3 to be painted. Fluctuates depending on the distance. In addition, since the base material 3 is transported in one direction at the time of coating, the position of the ink i attached to the base material 3 is also affected by the transport of the base material 3.

  Therefore, in the case of the base material 3 having the flat surface 30 and the inclined surface 31 as described above, the flat surface 30 can be coated with substantially the same ink density on the high flat surfaces 30a and 30b and the low flat surface 30c. it can. However, as shown in FIG. 6A, the receiving inclined surface 31 b of the inclined surface 31 has a lower ink density than the flat surface 30 due to the influence of the inclination. Further, the escape slope 31a is affected by the conveyance of the base material 3 in addition to the influence of the slope, and the ink density is lower than that of the receiving slope 31b. Therefore, when the substrate 3 is viewed in plan from the field of view A, as shown in FIG. 6B, the color of the receiving slope 31b is dark, the color of the escape slope 31a appears light, and a color shift occurs from the intended appearance. was there. Further, when the receiving slope 31b is viewed from the field of view B orthogonal to the receiving slope 31b, the color appears to be lighter than that of the flat surface 30, and when the escape slope 31a is viewed from the field of view C orthogonal to the escape slope 31a, the flat surface 30 also appears. Even the color seemed pale.

This invention is made in view of said point, and it aims at providing the manufacturing method of the coating building member which can suppress the fall of an external appearance by making the difference of the external appearance of a relief slope and a receiving slope small. To do.

In the method for manufacturing a painted building member according to the present invention, when coating is performed by inkjet coating while transporting a substrate having an inclined surface and a flat surface , the inclined surface is constituted by an escape slope and a receiving slope, The slope is formed so as to incline upward toward the front side in the transport direction of the base material, and the receiving slope is formed so as to tilt upward toward the rear side in the transport direction of the base material, Adjust the color tone data so that the appearance on the escape slope and the appearance on the receiving slope are approximately the same,
The tone data is at least one selected from the group of dot density, dot diameter, and ink color,
The color tone data is adjusted such that the ink adhesion area on the escape slope and the ink adhesion area on the receiving slope are substantially equal, or the colors exhibited by the relief slope and the receiving slope are substantially the same. It is adjusted so that,
The dot density is higher than the ejection dot density of the ink painted on the receiving slope, and more dense than the ejection dot density of the ink painted on the receiving slope. It is adjusted by making the jet dot density of ink painted on the escape slope dense,
The dot diameter is larger than the dot diameter of the ink painted on the flat surface, and larger than the dot diameter of the ink painted on the receiving slope, and more than the dot diameter of the ink painted on the receiving slope. It is adjusted by increasing the dot diameter of the ink painted on the
The ink color is darker than the ink color painted on the flat surface, and darker than the ink color painted on the receiving slope, and further painted on the escape slope than the ink color painted on the receiving slope. It is characterized in that coating is performed by adjusting the ink color of the ink to be darkened .

  In the present invention, the substrate is preferably a ceramic substrate.

  In the present invention, since the color tone data is adjusted so that the appearance of the escape slope and the appearance of the receiving slope are substantially the same, the difference in appearance between the escape slope and the receiving slope is reduced to reduce the appearance. It can be suppressed.

An example of embodiment of this invention is shown, (a)-(c) is sectional drawing. It is the schematic which shows the case where the jet dot density same as the above is adjusted. It is the schematic which shows an example of an inkjet type coating machine. An example of a base material is shown, (a) is a sectional view and (b) is a plan view. (A) is schematic which shows an example of embodiment of this invention, (b) is schematic which shows a prior art example. A prior art example is shown, (a) is a sectional view and (b) is a plan view.

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

  The base material 3 can be a ceramic substrate mainly composed of cement. 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. The base material 3 can be formed in the same shape as that shown in FIGS.

  In the present embodiment, the ink jet coating machine shown in FIG. 3 can be used.

  And when coating the base material 3, it can carry out by conveying the base material 3 to one direction under the coating nozzle head 9 with the conveyance conveyor 12. FIG. That is, when the base material 3 passes under the coating nozzle heads 9y, 9c, 9m, and 9k, each of the aqueous inks of yellow, cyan, magenta, and black is ejected from the coating nozzle heads 9y, 9c, 9m, and 9k. Painted. And when a part of base material 3 is seen, the base material 3 is the high flat surface 30a of the front side with respect to the conveyance direction, the escape slope 31a, the low flat surface 30c, the receiving slope 31b, and the high flat surface of the rear side. It is painted in the order of 30b.

  In this embodiment, the flat surface 30, the escape slope 31 a, and the receiving slope 31 b are subjected to painting by changing color tone data. Here, the tone data refers to the dot diameter, dot density, and ink color of the ink i ejected from the coating nozzle head 9. In this embodiment, the dot density, the dot diameter, and one or more of the ink colors are adjusted and applied. The color tone data can be adjusted by the coating control system 11.

Specifically, as shown in FIG. 1A, when the dot density is adjusted, the ink i _U coated on the receiving inclined surface 31b has a density higher than the ejection dot density of the ink i _H painted on the flat surface 30. injection dot density in close, to receive an injection dot density of the ink i _N to be coated on the inclined surface 31a relief than injection dot density of the ink i _U to be coated on the inclined surface 31b to close. This makes it possible to the adhesion area of the ink i _U in adhesion area and the receiving slopes 31b of the ink i _N on the flank slopes 31a substantially equal. The dot density can be adjusted by controlling the coating control system 11 so that the timing at which the ink i is ejected from the ejection nozzle 8 is changed between the flat surface 30, the escape slope 31a, and the receiving slope 31b. For example, if the timing H at which the ink i is ejected from the ejection nozzle 8 is the same for the escape slope 31a and the receiving slope 31b, as shown in FIG. 5B, the dot density of the ink i _N coated on the escape slope 31a. is smaller than the dot density of the ink i _U being painted it receives slopes 31b (becomes coarse). Therefore, as shown in FIG. 5 (a), the timing N in the case of painting the relief slope 31a in the ink i _N is controlled to be shorter than the timing U when the receiving slope 31b painted with ink i _U . This makes it possible to the adhesion area of the ink i _U in adhesion area and the receiving slopes 31b of the ink i _N on the flank slopes 31a substantially equal.

  Here, as a timing control method, it is possible to change the interval of injection between the injection nozzles arranged in the conveyance direction of the base material 3, but in order to carry out more simply, when it is viewed with one injection nozzle The timing can be controlled by adjusting the combination of when the injection is performed and when the injection is not performed.

When the dot density is adjusted and painted in this way, the jet dot density can be made different between the flat surface 30 and the inclined surface 31. For example, using the black ink, when expressing the same hue at a flat surface 30 and the inclined surface 31, the injection dot density of the ink i _H of, as shown in FIG. 2, the high flat surface 30a and the lower flat surface 30c compared to, the ink in the ink i increase the injection dot density of _N (tightly) painted substrate 3 by the time the surface of the relief slope 31a (e.g., flat surface 30 and the inclined surface 31) dots The density can be made substantially the same.

Further, as shown in FIG. 1 (b), when adjusting the dot diameter is larger dot diameter of the ink i _U to be coated on the inclined surface 31b receiving than the dot diameter of the ink i _H to be coated on the flat surface 30 and it receives a larger dot diameter of the ink i _N to be coated on the inclined surface 31a relief than the dot diameter of the ink i _U to be coated on the slope 31b. Thus, it is possible to make the adhesion area of the ink i _U substantially equal in adhesion area and the receiving slopes 31b of the ink i _N the flank slope 31a. The dot diameter is adjusted by, for example, providing a plurality of ejection nozzles 8 having different dot diameters of the ejected ink i in the painting nozzle head 9 and controlling the flat surface 30, the escape slope 31 a, and the receiving slope under the control of the painting control system 11. The injection nozzle 8 used when painting 31b can be switched.

Further, as shown in FIG. 1 (c), when adjusting the ink color is darker ink color of the ink i _U to be coated on the inclined surface 31b receiving than the ink colors of the ink i _H to be coated on the flat surface 30 and it receives thicken ink color of the ink i _N to be coated on the inclined surface 31a relief than the ink colors of the ink i _U to be coated on the slope 31b. Thereby, even if the dot density of the escape slope 31a is lower (rougher) than the dot density of the reception slope 31b, the colors exhibited by the escape slope 31a and the reception slope 31b can be made substantially the same. In other words, the escape slope 31a and the receiving slope 31b can have an appearance of a color that is a mixture of the color of the receiving layer (mostly white) and the ink color (gray if the ink color is black). , They appear to be approximately the same color. For the adjustment of the ink color, for example, a plurality of paint supply tanks 10 having different ink i colors are provided, and the flat surface 30, the escape slope 31 a, and the receiving slope 31 b are painted under the control of the paint control system 11. At this time, the color intensity of the ink i supplied from the paint supply tank 10 to the ejection nozzle 8 can be switched.

In this way, it is possible to form a flat paint building member used as an outer wall material or the like. Then, in this painted building member, when viewed from being perpendicular to the flat surface 30 (particularly, the low flat surface 30c), the appearance on the escape slope 31a and the appearance on the receiving slope 31b are substantially the same. Since the painting is performed by adjusting the color tone data, the difference in appearance between the escape slope and the receiving slope can be reduced to suppress the deterioration of the appearance. Note that the escape slope 31a and the receiving slope 31b are formed of one substrate. A plurality may be formed in 3.

  In addition, fine uneven patterns such as stones, stone splits, and woods may be formed on the flat surface or the inclined surface. Moreover, it may be a wave shape in which a flat surface and an inclined surface are continuous.

3 Substrate 31 Inclined surface 31a Escape slope 31b Receiving slope

Claims (2)

In coating by inkjet coating while transporting a substrate having an inclined surface and a flat surface , the inclined surface is composed of an escape slope and a receiving slope, and the escape slope faces the front side in the transport direction of the substrate. The receiving slope is formed so as to rise upward toward the rear side in the transport direction of the base material, and the appearance on the escape slope and the appearance on the receiving slope Adjust the color tone data so that
The tone data is at least one selected from the group of dot density, dot diameter, and ink color,
The color tone data is adjusted such that the ink adhesion area on the escape slope and the ink adhesion area on the receiving slope are substantially equal, or the colors exhibited by the relief slope and the receiving slope are substantially the same. Adjusted so that
The dot density is higher than the ejection dot density of the ink painted on the receiving slope, and more dense than the ejection dot density of the ink painted on the receiving slope. It is adjusted by making the jet dot density of ink painted on the escape slope dense,
The dot diameter is larger than the dot diameter of the ink painted on the flat surface, and larger than the dot diameter of the ink painted on the receiving slope, and more than the dot diameter of the ink painted on the receiving slope. It is adjusted by increasing the dot diameter of the ink painted on the
The ink color is darker than the ink color painted on the flat surface, and darker than the ink color painted on the receiving slope, and further painted on the escape slope than the ink color painted on the receiving slope. A method for producing a painted building member, wherein the coating is performed by adjusting the ink color of the ink to be darkened . Method for manufacturing a coated building element according to claim 1, wherein the substrate is a ceramic-based substrate.

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