JP2008029925A - Method of coating woody material by inkjet coating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of coating a woody material by an inkjet coating apparatus by which it is prevented that the difference between the color of the woody material to be coated and the finished color becomes large and the coating is made thick. <P>SOLUTION: The method of coating the woody material is provided with the inkjet coating apparatus and a color specification value measuring means for measuring the color specification value of the color and comprises a color specification value measuring step for measuring the color specification value of the color of the woody material to be coated by the color specification value measuring means, a color pattern selection step for selecting one finished color pattern from a plurality of kinds of the finished color patterns based on the measured color specification value, a color difference computing step for computing the color difference between the selected finished color pattern and the color specification value of the woody material measured by the color specification value measuring means and a coating step for carrying out the coating corresponding to the color difference computed in the color difference computing step using the inkjet coating apparatus. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for coating a wood material using an inkjet coating apparatus.

  Conventionally, an ink jet coating apparatus has been used to paint a wood material (see, for example, Patent Document 1).

  The method disclosed in Patent Document 1 includes a color value measuring means for measuring the color value of a color to be painted, and the color value of the color to be painted is measured by the color value measuring means. At the same time, by applying a color difference between the measured color value and the finished color using an inkjet coating apparatus, the object to be coated can be colored to the finished color.

  By the way, if the object to be painted is a wood material, it is not a concealed coating in which the base is not visible by thickening the paint, but by making the paint thin and making the base visible so that the wood texture of the material is utilized. Can be put out.

However, in this case, if the color difference between the color of the wood material and the finished color is large, the paint of the color difference will be thick and the cover will become thick, and the texture of the base will not be seen, giving the wood texture I can't. If there are multiple finished color patterns, painting with a finished color pattern with a large color difference cannot produce a wood texture as described above, and requires a lot of paint, which is wasteful. It was.
JP 2000-153191 A

  The present invention has been made in view of the above points, and an object of the present invention is to provide a wooden material by an ink jet apparatus in which the color difference between the color of the wooden material to be painted and the finished color is large and the coating does not become thick. It is an object of the present invention to provide a method for painting a material.

  In order to solve the above-mentioned problem, the invention according to claim 1 includes an ink jet coating apparatus and a color value measuring means for measuring a color value of the color, and the color value measuring means is used for the coating object. A color value measurement step for measuring the color value of the color of the wood material, a color pattern selection step for selecting one finished color pattern from a plurality of types of finished color patterns based on the measured color value, and A color difference calculating step for calculating the color difference between the selected finished color pattern and the color value of the wood material measured by the color value measuring means, and a coating corresponding to the color difference calculated in the color difference calculating step by inkjet coating And a painting process performed by an apparatus.

  By adopting such a configuration, the wood material can be painted so as to have a finished color with a small color difference from the color, and the coating can be thin.

  In the invention according to claim 2, in the invention according to claim 1, in the colorimetric value measurement step, an average value over the entire surface of the color value of the wood material is represented by the color value of the color of the wood material. It is characterized by that.

  By setting it as such a structure, it can prevent receiving the influence of the partial variation of a wooden material.

  In the present invention, the wood material can be painted so as to have a finished color with a small color difference from the color, the coating can be thinned, and the grain of the base can be seen through the painting to give a wood texture And less paint.

  An embodiment of the present invention will be described with reference to the drawings. In the present invention, a wood material is coated using an inkjet coating apparatus so as to have a finished color.

  The ink jet coating apparatus will not be described in detail here, but for example, paints of each color of cyan (C), magenta (M), yellow (Y), and black (K) are used, and the intensity of each color is determined for each pixel. The desired color is applied by adjusting, and there is no particular limitation as long as it is a coating apparatus of this type.

  The target of painting by this inkjet coating apparatus is not particularly limited, but the present invention is particularly effective for a surface having a pattern or a different color on the surface of the painting target. Use wood.

  The object to be painted is to make the surface a target finish color by painting, but as described above, the paint is not concealed and the wood texture of the underlying surface is used to give a wood texture The paint is kept as thin as possible. In the present embodiment, a plurality of patterns with different colors are set. In the present embodiment, three finished color patterns with circled numbers 1, 2, and 3 are set as shown in FIG. Yes.

  The object to be painted is the finish color that is the target by applying the paint. At this time, as described above, the paint is not used as a concealment paint, but the wood texture of the ground surface is used to create a wood texture. It keeps it thin. For this reason, in order to reduce the color difference between the surface color of the wooden material to be painted and the finished color and make the coating thinner, the finish of the color that is close among multiple finished color patterns according to the color of the surface of the wooden material One color pattern is selected, and the color difference is applied by an ink jet coating apparatus.

  The color of the surface of the wood material is obtained by measuring the color value of the color with a color value measuring means. Although the detailed description is omitted here, the colorimetric value measuring unit is basically the same device as a scanner or the like, and measures the intensity of each color for each pixel as in the RGB type, for example. Is not. The painting method of the present invention has a color value measurement step of measuring the color value of the wood material by this color value measurement means, and then the color value of the color of the wood material measured in the step. A color pattern selection step for selecting which finished color pattern the wooden material is to be painted based on is provided.

  In the color pattern selection step, although not shown, the control unit selects according to the operation program based on the color value information of the wood material output from the color value measurement means, or the wood quality output from the color value measurement means An operator makes a judgment based on the color value information of the material. In this case, the color value information of the wood material output from the color value measurement unit is plotted as a point on the plane showing the color. And about the assignment of the finished color pattern, that is, which finish color pattern to select when the wood material color is in the range, it is close to the color of the wood material, or the painting can be the thinnest or It is determined and assigned in advance from the viewpoint that the pattern of the wooden material of the ground can be seen well. When automatically performed by the operation program, the color values of the wood material are distributed according to the assignment by the operation program, and when performed by the operator, as shown in FIG. A region is divided for each finished color pattern (circled numbers 1, 2, and 3) to which it belongs, and is selected by determining to which region the point representing the color value of the plotted wood material belongs.

  Here, the color value of the wood material can be measured by measuring one or several color values of the surface of the wood material, or by measuring over a certain area, that is, a part of or the entire surface. However, when measuring about a some pixel, the average value is employ | adopted as a colorimetric value of a wooden material. Thereby, it can prevent receiving the influence of the partial variation of a wooden material.

  Then, in the color difference calculation step for calculating the color difference between the finished color pattern selected in the color pattern selection step and the color value of the wood material measured by the color value measurement means, the color to be painted (that is, the color difference) ) Is calculated. Also in this case, a control unit (not shown) may automatically calculate according to the operation program, or an operator may calculate.

  And based on the color difference calculated at the color difference calculation process, it coats with an inkjet coating apparatus at the next coating process. Even in this process, although not shown, when the control unit automatically performs, the information on the finished color pattern selected in the color pattern selection process and the color value of the wood material are transmitted to the ink jet coating apparatus. When the operator performs, information on the finished color pattern selected in the color pattern selection step and information on the color values of the wood material are input to the control unit of the inkjet coating apparatus.

  According to the present invention as described above, by assigning the finished color pattern based on the color value of the color of the wood material to a color close to the color of the wood material as described above, the color difference between the wood material and the color is reduced. The paint can be painted to have a small finished color, the paint can be thinned, the wood grain of the base can be seen through the paint, and the wood texture can be reduced.

It is a flowchart of one Embodiment of this invention. (A) shows the finished color pattern, and (b) is a diagram for explaining the assignment of the finished color pattern.

Claims (2)

  A colorimetric value measuring step for measuring a colorimetric value of a wood material to be coated by the colorimetric value measuring unit, comprising an inkjet coating apparatus and a colorimetric value measuring unit for measuring a colorimetric value of the color; A color pattern selecting step for selecting one finished color pattern from a plurality of kinds of finished color patterns based on the measured color values, and the selected finished color pattern and the wood material measured by the color value measuring means. According to an ink jet coating apparatus, comprising: a color difference calculating process for calculating a color difference from a color value of a color; and a coating process for performing coating corresponding to the color difference calculated in the color difference calculating process by an ink jet coating apparatus. How to paint wood. 2. A wood material coating by an ink jet coating apparatus according to claim 1, wherein in the color value measurement step, an average value of the color values of the wood material over the entire surface is used as the color value of the color of the wood material. Method.