JP2012035541A - Coating process of woody material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a grain pattern clear by coloring summerwood and springwood sections which form a grain of material surface in different colors.SOLUTION: A coating process comprises: a pretreatment step which renders surface unevenness smooth with a buffing tool such as a sandpaper as a pretreatment, wherein the surface is that of a woody material to be coated; a brush-coating step which brush coats a paint of required color along the grain on the whole surface of woody material pretreated in the pretreatment step; a wiping-off step which waits the paint brush coated in the brush-coating step permeating into the woody material while leaving it for a given length of time and wipes the whole surface of woody material with a wiper such as a cloth; a spray coating step which spray coats a paint of required color after leaving the woody material for a given length of time, wherein the woody material has been wiped free of the former paint in the wiping-off step; and a sealing step which dries the spray coated paint by leaving the woody material spray coated in the spray coating step for a given length of time, applies a sealer on the whole surface of woody material and dries until the sealer makes a coating film and further the coating film cures.

Description

  The present invention relates to a method for painting a surface of a base material made of wood.

  Conventionally, there exists what was disclosed by patent document 1 as one form of the coating method (coloring method) of a wooden material. That is, in Patent Document 1, after applying wood stain to the surface of the wood material for coloring, high-pressure and high-speed air is blown onto the surface of the substrate to remove excess wood stain other than the conduit portion. A method for coloring a wooden material is disclosed in which the base surface of the wooden material is uniformly colored and then painted according to the coating specifications.

Japanese Patent No. 2645627

  However, the above-described work for removing the wood stain is to spray the wood stain by blowing high-speed air at a wind speed of 80 / second in a curtain shape and moving it at a speed of 5 m / min. In addition, it is complicated. Therefore, the coloring method of the wood material has a problem that the work efficiency is not good.

  By the way, normally, a concentric pattern, that is, an annual ring, is formed on the cross section of the tree from the temperate zone to the cold zone. The reason why the annual rings appear to be ring-shaped is that in the spring the stem grows thick and the cell wall becomes sparse, and in the summer the stem enlargement grows slowly and the cell wall becomes dense. As a result, the annual ring is formed of a light-colored portion (spring material portion) formed in the spring and a dark-colored portion (summer material portion) formed in the summer. When the wood having such annual rings is cut in the longitudinal direction, the grain appears in the spring wood portion and the summer wood portion.

  Here, since the summer wood part of the grain has a dense cell wall, the summer wood part does not suck the paint. For this reason, it has been difficult to vividly color the grain.

  Therefore, the present invention can sharpen the wood grain pattern by coloring different colors on the summer wood part and the spring wood part that form the grain of the material surface, and perform such work easily and quickly. It aims at providing the painting method of the wood material which can do.

  (1) The wood material coating method according to the invention of claim 1 includes a pretreatment step of smoothing with a shaving tool such as a paper file as a pretreatment on the unevenness of the surface of the wood material as a painted surface, and a pretreatment The brush coating process in which the paint of the required color is brushed on the entire surface of the wood material material pre-processed in the process along the grain, and the paint that has been brushed in the brush coating process penetrates into the wood material material. Wait for a while and wait until the entire surface of the wood material is wiped with a cloth or other wiping tool.The wood material that has been wiped off in the wiping process is left for a certain period of time, and then the paint of the required color is sprayed. The spray coating process to be applied and the wood material sprayed in the spray coating process are allowed to stand for a certain period of time, the sprayed paint is dried, the base paint is applied to the entire surface of the wooden material, and the base paint is applied. Membrane Further characterized the surface treatment step of drying until the paint film is cured, that it has.

  (2) The wood material coating method according to the invention of claim 2 is the wood material coating method according to claim 1, wherein the paint material of the required color is further spray-coated after the spray coating step. A spray coating step.

  The present invention has the following effects. That is, the wood grain pattern can be clarified by coloring the summer wood portion and the spring wood portion forming the surface of the wood material in different colors. In addition, the color of the summer wood part and the wood part of the grain can be selected from a variety of colors and can be combined as appropriate. And the combination of colors can bring out a sense of luxury and novelty. Therefore, for example, when painting a wooden material that forms the outer wall of a house, it is possible to sharpen the grain pattern with a color that suits the consumer's preference as described above, and to achieve individuality and differentiation As a result, customer satisfaction can be increased. And the landscape can be enhanced. Further, such a painting operation can be performed easily and quickly. Therefore, it is possible to improve the wood material painting work efficiency.

Explanatory drawing of a painting process. The perspective view (a) and front view (b) of the wood material pre-processed by the pre-processing process. The perspective explanatory drawing (a) of a brush painting process, and the front view (b) of the wood material after brush painting. The perspective explanatory drawing (a) of a wiping process, and the front view (b) of the wooden material after wiping off. The perspective explanatory drawing (a) of a spray coating process, and the front view (b) of the wooden material after spray coating. The perspective explanatory view (a) of a post-processing process, and the front view (b) of the wooden material which completed painting.

Embodiments of the present invention will be described below with reference to the drawings.
The process diagram shown in FIG. 1 shows a painting process K of the wood material W according to the present embodiment. The wood material W painting process K includes a pretreatment process K1, a brush painting process K2, a wiping process K3, a spray painting process K4, and a post-treatment process K5.

  The pretreatment step K1 is a step of smoothing the unevenness of the surface of the wood material W serving as the painted surface with a shaving tool (not shown) such as a paper file (paper) as a pretreatment.

  The brush coating step K2 is a step of brushing a paint Ph having a required color along the grain on the entire surface of the material surface of the wood material W pretreated in the pretreatment step K1. Here, the grain is formed of a summer wood part Wn having a dense cell wall and a spring wood part Wh having a loose cell wall. H is a brush.

  The wiping process K3 waits for a certain period of time for the paint Ph applied in the brush coating process K2 to penetrate into the material of the wooden material W, and then the entire surface of the wooden material W is wiped with a wiping tool F such as cloth. This is a wiping process.

  The spray coating process K4 is a process in which the wood material W from which the paint Ph has been wiped off in the wiping process K3 is left for a certain period of time, and then the paint Ps of a required color is sprayed by the hot air gun spray G. At this time, the paint Ps to be sprayed is a paint Ps having a color different from that of the paint Ph applied by the brush coating process K2, preferably a lighter color such as white or gray, and is applied with a brush to apply the spring material part. By spraying on the paint Ph infiltrated with Wh, the color of the paint Ph in the remaining spring material portion Wh can be lightened (discolored). Here, since the paint Ph that has penetrated into the material of the spring wood part Wh in the wiping process K3 is not completely dry, when it is applied with the brush H, the color is simply mixed and the single color paint P is applied to the surface of the wood material W. It will cover the whole surface. However, by spray coating, the combined color (discoloration) Pc of the color of the sprayed paint Ps in the summer wood part Wn and the color of the penetrated paint Ph in the spring wood part Wh and the color of the sprayed paint Ps is clarified. In addition, it is possible to create distinctive colors and create a sense of luxury and novelty.

  Moreover, the spray coating process K4 can provide a two-stage process including a first spray coating process K4a and a second spray coating process K4b. After the first spray coating process K4a, a second spray coating process K4b for spraying a paint having a required color (for example, yellow) may be provided. When the second spray coating is performed, the second spray color is partially developed in the summer material portion Wn having the first spray color, and the diversification of colors can be enjoyed. At this time, since the location and range of the second spray color that is partially developed depend on the material of the summer wood portion Wn of the wood material W, it is possible to enjoy the unexpectedness of the developed color tone.

  The post-treatment process K5 includes a base treatment process K5a and an overcoating process K5b. In the ground treatment process K5a, the wood material W sprayed in the spray painting process K4 is left for a certain period of time, the sprayed paint Ps is dried, and the ground paint Pu is sprayed onto the entire surface of the wood material W with a hot air gun spray. This is a step of spraying with G to dry the base paint Pu until it becomes a transparent paint film and further the paint film (not shown) is cured. Then, when the paint film is cured, the finish of the paint film is improved by scraping the paint film with a paper file or the like until it becomes smooth. The top coating step K5b is a step of spray-coating the top coating material (protective coating material) Po with the warm air gun spray G over the entire surface of the material of the wood material W that has been subjected to the ground processing in the ground processing step K5a. When the coating film is cured in the overcoating step K5b, the process is complete. Therefore, this overcoating step K5b is the final step.

  Next, the present embodiment will be specifically described with reference to FIGS.

[In pretreatment step K1]
The material surface of the wood material W, which is a shaved wood, was smoothed without any roughness by shaving with a paper file # 180. Further, the paper file # 320 finer than 180 was used to sharpen the irregularities along the grain again.

[In brush coating process K2]
The product name “Everlock Urethane” (manufactured by Rock Paint Co., Ltd.), a two-component urethane resin paint in which the main agent and curing agent are mixed at a volume ratio of 9: 1, is diluted with thinner (volume of paint and thinner is volumetric). Formulated at a ratio of 3: 7). This thinned paint Ph was applied so as to penetrate the entire surface of the wood material W. Here, green was adopted as the color of the paint Ph to be brushed.

[In wiping process K3]
The wood material W coated with the paint Ph in the brush coating process K2 was left at room temperature for 5 minutes to wait for the paint Ph to penetrate into the wood material W. The paint Ph applied to the wood material W was wiped off with a cloth F as a wiping tool. At this time, the cloth F was wiped and slid along the grain. And since the summer material part Wn did not inhale the paint Ph, it wiped off again with the clean cloth F so that the paint P might not remain in the summer material part Wn.

[In spray coating process K4]
The wooden material W from which the paint Ph was wiped off in the wiping step K3 was left at room temperature for 5 minutes. Thereafter, white was adopted as the color of the paint Ps to be sprayed. As a result, the summer wood part Wn was white, and the spring wood part Wh became light green as the combined color (discoloration) Pc. At this time, it was possible to sharpen the grain with the contrast between the white of the summer wood part Wn and the light green of the spring wood part Wh. Further, it was possible to securely protect the grain, that is, to ensure good water repellency, mold resistance and durability.

[In the surface treatment step K5a]
The wood material W paint sprayed in the spray coating process K4 was dried at room temperature for about 6 to 10 hours. Thereafter, the product name “Everlock” (manufactured by Rock Paint Co., Ltd.), which is a urethane resin paint as the base paint Pu, was sprayed on the entire surface of the wood material W until it was formed into a paint film with the hot air gun spray G. And it was made to dry until the coating film hardened | cured for about 4 hours. When the paint film was hardened, the paint film was scraped with a paper file # 320 until the surface became smooth to improve its appearance.

[In overcoating process K5b]
On the entire surface of the wood surface of the wood material W, apply the product name “Everlock” (manufactured by Rock Paint Co., Ltd.) as a top coat (protective paint) Po so that the hot air gun spray G does not cause any spots. Sprayed. The coating film was completed when the coating film was cured. As a result, it was possible to obtain a wood material W with a clear grain pattern on the surface of the material.

W Wood material K Painting process K1 Pretreatment process K2 Brush painting process K3 Wiping process K4 Spray painting process K5 Post-treatment process

Claims (2)

A pretreatment step of smoothing the unevenness of the surface of the wooden material to be painted with a shaving tool such as a paper file as a pretreatment;
A brushing process for brushing a paint of a desired color along the grain on the entire surface of the wood material pretreated in the pretreatment process;
Waiting for a certain period of time for the paint applied in the brush painting process to penetrate into the wood material, and then wiping the entire surface of the wood material with a wiping tool such as cloth,
A spraying process in which the wood material from which the paint has been wiped off in the wiping process is left for a certain period of time, and then sprayed with a paint of the required color;
The wood material sprayed in the spraying process is left for a certain period of time, the sprayed paint is dried, the base paint is applied to the entire surface of the wood material, and the base paint becomes a paint film. A surface treatment step for drying until the material is cured;
A method for painting a wood material, comprising: A second spraying process in which a paint of the required color is further sprayed after the spraying process,
The method for painting a woody material according to claim 1, wherein:

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