Wood-grain-like ornament, and method for manufacturing wood-grain-like ornament

Abstract

To provide a technique of applying a wood-grain-like pattern while suppressing distortion on a substrate surface.SOLUTION: A wood-grain-like ornament 10 comprises a substrate 11 and a wood-grain layer 12 covering the surface of the substrate 11, where the wood-grain layer 12 has a first coating layer 12A covering the surface of the substrate 11 and a second coating layer 12B covering the surface of the first coating layer 12A, the brightness of first coating layer 12A is higher than the brightness of second coating layer 12B, the first coating layer 12A has a first region R1 covered by the second coating layer 12B and an exposed second region R2, and the surface of the first coating layer 12A in the second region R2 and the surface of the second coating layer 12B covering the first region R1 have a stepped profile and separate by a predetermined distance H in a lamination direction L.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a wood grain decorative article and a method for manufacturing a wood grain decorative article. [Background technology]

[0002] Patent Document 1 discloses a technique for transferring a hydraulic transfer film having projections and recesses onto an object, thereby transferring a pattern having projections and recesses onto the surface of a substrate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-64098 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the technology of Patent Document 1, when the water pressure transfer film is transferred to an object having a three-dimensional shape, there is a concern that the pattern on the water pressure transfer film may be distorted when transferred due to the three-dimensional shape of the substrate.

[0005] The present disclosure has been made in light of the above-mentioned circumstances, and aims to provide a technique for applying a wood grain pattern to the surface of a substrate while suppressing distortion. [Means for solving the problem]

[0006] The wood-grain decorative article of the first disclosure comprises a base material and a wood-grain layer covering the surface of the base material, the wood-grain layer having a first coating layer covering the surface of the base material and a second coating layer covering the surface of the first coating layer, the brightness of the first coating layer being higher than the brightness of the second coating layer, the first coating layer having a first region covered by the second coating layer and an exposed second region, the surface of the first coating layer in the second region and the surface of the second coating layer covering the first region forming a stepped shape spaced a predetermined distance apart in the stacking direction.

[0007] Wood grain is formed by alternating summer grain and winter grain. Generally, the winter grain has a lower brightness and higher hardness than the summer grain. For example, when wood is cut, the summer grain is softer than the winter grain and is therefore more easily scraped off with a blade, and the cut surface tends to be formed with the summer grain relatively more recessed than the winter grain (the winter grain protruding more than the summer grain). According to the first disclosure, it is possible to satisfactorily reproduce the unevenness caused by the summer grain and winter grain on the cut surface of wood using the first coating layer and the second coating layer. Brightness is the degree of lightness of a color. The higher the brightness, the whitish the color, and the lower the brightness, the darker the color.

[0008] The second disclosed method for manufacturing a wood-grain decorative item comprises a first step of covering the surface of a base material with a first coating layer, a second step of covering the surface of the first coating layer with a second coating layer that is less bright than the first coating layer, and a third step of partially removing the second coating layer with a laser to expose the surface of the first coating layer and form a wood-grain pattern.

[0009] According to the second disclosure, it is possible to satisfactorily reproduce the unevenness caused by summer and winter patterns by the first and second coating layers.

[0010] Therefore, according to the present disclosure, it is possible to provide a wood grain decorative item that reproduces wood grain well. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a plan view showing a wood grain decorative item according to a first embodiment. [Figure 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. [Figure 3] 1 is a schematic diagram showing an example of the steps of a method for manufacturing a wood grain decorative article according to the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] A preferred embodiment of the present disclosure will be described.

[0013] The predetermined dimension in the wood grain decorative article of the first disclosure may be 20 μm to 40 μm. This configuration makes it easy to imitate the unevenness of the cut surface of real wood.

[0014] The pencil hardness of the second coating layer in the first disclosure may be 2H or more. With this configuration, the second coating layer is harder than the coating layer formed from the water pressure transfer film used in wood grain products, and the second coating layer can be made less susceptible to wear.

[0015] <Embodiment 1> The wood grain decorative item 10 shown in Fig. 1 comprises a base material 11 and a wood grain layer 12 formed to cover the surface of the base material 11, as shown in Fig. 2. Here, the surface refers to the upward surface in Fig. 2. The wood grain layer 12 has a first coating layer 12A covering the surface of the base material 11 and a second coating layer 12B covering the surface of the first coating layer 12A. The base material 11 is made of a synthetic resin such as PMMA or ABS. The base material 11 is formed, for example, by injection molding or using a 3D printer.

[0016] For example, a general solvent-based two-component paint is used for the wood grain layer 12. The color of the first coating layer 12A is, for example, a brown with a higher brightness than the second coating layer 12B. The term "color" here includes hue, brightness, and saturation. Hue refers to relative differences in color tone. Hue refers to differences in color tone (shade), such as red, orange, yellow, green, blue, and purple. Brightness refers to the degree of brightness of a color. The higher the brightness, the whitish the color, and the lower the brightness, the darker the color. Saturation refers to the vividness of a color. The higher the saturation, the more vivid the color, and the lower the saturation, the duller the color. The color of the second coating layer 12B is a brown with a lower brightness than the first coating layer 12A. In other words, the brightness of the first coating layer 12A is higher than the brightness of the second coating layer 12B. The thickness of the first coating layer 12A is approximately 15 μm or more and 25 μm or less. The thickness of the second coating layer 12B is approximately 20 μm or more and 40 μm or less.

[0017] The first coating layer 12A has a first region R1 and a second region R2. The first region R1 is covered by the second coating layer 12B. The second region R2 is exposed and not covered by the second coating layer 12B. The surface of the first coating layer 12A in the second region R2 and the surface of the second coating layer 12B covering the first region R1 are stepped apart by a predetermined distance H in the stacking direction L. The predetermined distance H is the thickness of the second coating layer 12B, and is approximately 20 μm to 40 μm. The pencil hardness of the first coating layer 12A and the second coating layer 12B is 2H or higher in a pencil hardness test according to JIS K5600-5-4. The wood grain decorative article 10 is constructed in this manner.

[0018] [An example of a manufacturing method for woodgrain ornaments] Next, an example of a manufacturing method for the wood grain decorative item 10 will be described. The manufacturing method for the wood grain decorative item 10 comprises a first step, a second step, and a third step. First, a synthetic resin base material 11 is prepared by molding (see FIG. 3(A)). Next, the first step is carried out, in which the surface of the base material 11 is covered with a first coating layer 12A. In the first step, paint is sprayed onto the surface of the base material 11, and the solvent is volatilized and dried to form the first coating layer 12A, which covers the surface of the base material 11 (see FIG. 3(B)).

[0019] Next, a second step is carried out to cover the surface of the first coating layer 12A with the second coating layer 12B. In the second step, paint is sprayed onto the surface of the first coating layer 12A, and the solvent is evaporated and dried to form the second coating layer 12B, which covers the surface of the first coating layer 12A (see FIG. 3(C)).

[0020] Next, a third step is performed in which the second coating layer 12B is partially removed with a laser La to expose the surface of the first coating layer 12A and form a wood grain pattern. By performing the third step, the first coating layer 12A, which has a higher brightness than the second coating layer 12B, is relatively recessed, and the second coating layer 12B, which has a lower brightness than the first coating layer 12A, is relatively protruding. As a result, the exposed portion of the first coating layer 12A can be made to appear to correspond to summer grain on wood, and the remaining portion of the second coating layer 12B can be made to appear to correspond to winter grain on wood (see FIG. 3(D)).

[0021] In the third step, for example, by moving the laser light source Ls (see FIG. 2) along the surface and side surfaces of the base material 11, the laser La is irradiated perpendicularly to the surface and side surfaces, thereby removing the second coating layer 12B without distortion. This makes it possible to prevent distortion of the grain of not only the surface but also the side surfaces of the base material 11.

[0022] As described above, the wood grain decorative item 10 of embodiment 1 comprises a base material 11 and a wood grain layer 12 covering the surface of the base material 11. The wood grain layer 12 has a first coating layer 12A covering the surface of the base material 11 and a second coating layer 12B covering the surface of the first coating layer 12A. The brightness of the first coating layer 12A is higher than the brightness of the second coating layer 12B. The first coating layer 12A has a first region R1 covered by the second coating layer 12B and an exposed second region R2. The surface of the first coating layer 12A in the second region R2 and the surface of the second coating layer 12B covering the first region R1 are stepped and spaced a predetermined distance H apart in the stacking direction L.

[0023] According to this configuration, it is possible to satisfactorily reproduce the unevenness caused by summer grain and winter grain on the cut surface of the wood by the first coating layer 12A and the second coating layer 12B.

[0024] The predetermined dimension H in the lamination direction L between the surface of the first coating layer 12A in the second region R2 and the surface of the second coating layer 12B covering the first region R1 is 20 μm or more and 40 μm or less. This configuration makes it easy to resemble the unevenness of the cut surface of real wood.

[0025] The pencil hardness of the second coating layer 12B is 2H or more. With this configuration, the second coating layer 12B is harder than the coating layer formed from the hydraulic transfer film used in woodgrain products, and the second coating layer 12B can be made less susceptible to wear.

[0026] The method for manufacturing the wood-grain decorative item 10 includes a first step of covering the surface of the base material 11 with a first coating layer 12A, a second step of covering the surface of the first coating layer 12A with a second coating layer 12B that is less bright than the first coating layer 12A, and a third step of partially removing the second coating layer 12B with a laser La to expose the surface of the first coating layer 12A and form a wood-grain pattern.

[0027] According to this configuration, it is possible to satisfactorily reproduce the unevenness caused by summer grain and winter grain on the cut surface of the wood by the first coating layer 12A and the second coating layer 12B.

[0028] The present disclosure is not limited to the embodiments described above and illustrated in the drawings, and the following embodiments, for example, are also included within the technical scope of the present disclosure.

[0029] (1) Unlike the above embodiment, thin films of paint may be applied to the surface of the substrate as the first and second coating layers, and then the second coating layer may be partially removed using a laser.

[0030] (2) Unlike the above embodiment, the third step may be performed by displacing the substrate relative to the fixed laser light source.

[0031] (3) The first coating layer and the second coating layer may have a color other than brown, as long as the brightness of the first coating layer is higher than the brightness of the second coating layer.

[0032] (4) Unlike the above embodiment, ultraviolet curable resin may be used for the first and second coating layers. In this case, the first and second coating layers are applied to the surface of the substrate, and then the first and second coating layers are cured by irradiating them with ultraviolet light, and then the third step is carried out. [Explanation of symbols]

[0033] 10...wood grain decorative article, 11...base material, 12...wood grain layer, 12A...first coating layer, 12B...second coating layer, H...predetermined dimension, L...lamination direction, La...laser

Claims

1. A substrate; a wood grain layer covering the surface of the base material; Equipped with The wood grain layer has a first coating layer that covers the surface of the base material and a second coating layer that covers the surface of the first coating layer, the first coating layer has a higher brightness than the second coating layer; the first coating layer has a first region covered by the second coating layer and an exposed second region; A wood grain decorative item, wherein the surface of the first coating layer in the second region and the surface of the second coating layer covering the first region are stepped and spaced a predetermined distance apart in the stacking direction.

2. 2. The wood grain decorative article according to claim 1, wherein the predetermined dimension is 20 μm to 40 μm.

3. 3. The wood grain decorative article according to claim 1, wherein the second coating layer has a pencil hardness of 2H or more.

4. a first step of covering a surface of a substrate with a first coating layer; a second step of covering the surface of the first coating layer with a second coating layer having a lower brightness than the first coating layer; a third step of partially removing the second coating layer with a laser to expose the surface of the first coating layer and form a wood grain pattern; A method for manufacturing a wood grain decorative item, comprising:

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