JPS644882B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a decorative material suitable for various crafts, decorative materials, furniture, construction materials, etc., which is made by carving a three-dimensional carved pattern on the surface of a wooden material using a laser beam. .

Conventionally, wood processing using laser beams has the following advantages: no saw dust is generated, there is no noise, complex shapes and patterns can be excavated freely, and since it is non-contact processing, there is no tool wear and less force is applied to the wood. It is known that it has the following advantages, and in recent years it has been partially used as a means for drilling, cutting, drilling, etc.

However, when excavating wood to create delicate patterns such as carvings, the speed at which the laser beam thermally decomposes varies depending on the density of cells in the wood, such as in spring and fall. Fourth
As shown in the figure, as the spring part a is largely shaved off, smooth straight lines and curves cannot be obtained at the edges of the excavated part, and the more complex the pattern, the less sharp it becomes. There are problems. This seems to be because the spring grain part of the wood, which has a smaller cell density, thermally decomposes and vaporizes faster than the autumn grain part, which has a higher cell density.

Therefore, if a pattern is simply cut into wood using a laser beam, the edges may be distorted depending on the tree species, and the cosmetic properties may be insufficient. The side surfaces of the membrane-like part become brittle due to carbonization due to thermal decomposition, and the tops of the convex patterns are chipped by a slight external force, which limits its use as a decorative material and its design.

The present invention solves the drawbacks and problems of decorative materials produced by excavating with laser beams, and involves applying resin injection treatment to a wooden base material with a resin-injected wood layer on its surface by irradiating it with laser beams. This relates to a decorative material characterized in that a concave film-like structure is carved that penetrates the wood layer and reaches the surface of the wood base material, and the carbonized surface of the wood base material is exposed at the bottom of the concave film-like structure. .

Embodiments of the present invention will be explained with reference to the drawings: 1
is a wooden base material made of veneer, plywood, LVL, particle board, or special wood with a thickness of about 5 to 20 mm, and a thin synthetic resin injection-treated wood board of about 0.5 to 2.0 mm in thickness is attached to the surface. A resin injection treated wood material layer 2 is integrally provided.

3 is a concave film-like pattern carved by irradiating a laser beam from the surface of the resin injection treated wood layer 2 to a depth that penetrates the resin injection treated wood layer 2 and reaches the surface of the wooden base material 1. It is excavated to form desired characters, designs, etc.

The bottom surface of this excavated concave pattern 3 is formed by carbonizing the surface layer of the wooden base material 1 by irradiation with a laser beam, and forming a dark brown uneven surface 4.

The resin-injected wood material layer 2 in the decorative material of the present invention may be made by injecting a transparent or semi-transparent synthetic resin to make a thin wood board transparent, or may be appropriately colored using a colored resin liquid or a colored veneer. The thickness depends on the depth of the concave film to be formed, but it is preferable to use one with a thickness of 0.5 mm or more in order to increase the surface hardness, and it is also used with a thickness of 5 mm or less. This method is preferable because it can perform a concave film-like engraving process using a laser beam in a short time.

Also, the amount of resin liquid injected varies depending on the species of the thin wood board, but it is 60 to 150% by weight of the thin wood board.
It is preferable to use the laser beam in a similar manner because the concave film-like edges created by the laser beam become sheep.

Excavation of concave membrane 3 by laser beam irradiation is
If the text is relatively simple, such as a pattern, the focus of the laser beam may be moved to draw the text or pattern, but in the case of a complex pattern 3 as shown in Figure 3, the focus of the laser beam may be moved to draw the pattern. Resin-injected wood material layer 2 with masking material, etc. that has through-holes in the same pattern as the design.
A laser beam may be irradiated from above to carve an excavation pattern corresponding to the through hole.

At this time, since the synthetic resin is injected into the voids such as conduits or tracheids and hardened inside the wood of the resin-injected wood material layer 2, the density difference between the spring and autumn marks of the wood becomes smaller. As a result, the wood is thermally decomposed uniformly by the laser beam. That is, the energy of the laser beam required for thermal decomposition is such that the synthetic resin is greater than the wood, so in the resin injection treated wood material layer 2, the thermal decomposition caused by the laser beam irradiation affects the density difference between the spring-grained portions, autumn-grained portions, etc. of the wood. The edges 5 of the pattern 3 drilled into the resin-injected wood material layer 2 are not distorted due to differences in the density of the wood, and are formed sharply. It is capable of faithfully reproducing delicate patterns.

In addition, in the resin-injected wood material layer 2, the progress of carbonization of the wood part is suppressed by the injected and hardened synthetic resin, so the concave film-like layer 3 excavated with a laser beam is
Among the side wall parts, the portion of the excavated end surface 2a of the resin-injected wood material layer 2 has little discoloration or deterioration due to carbonization of the wood, and the surface of the resin-injected wood material 2 and the excavated end surface 2a form a uniform decorative surface, giving it a solid and solid appearance. A textured pattern can be obtained, and if a wooden veneer made by injecting and hardening a transparent synthetic resin liquid into a wooden veneer to make it transparent or translucent is used as the resin-injected wood material layer 2, it can be seen from the excavation end surface 2a. The light rays are allowed to enter the inside of the resin-injected wood material layer 2, and a beautiful decorative surface with the transparency of the wood grain pattern further emphasized can be revealed.

Furthermore, as the resin injection treated wood material layer 2, a colored wood veneer is colored by injecting a synthetic resin,
Alternatively, if a wooden veneer is colored by injecting a colored synthetic resin liquid, the color of the resin-injected wood material layer 2 can be revealed on the side wall of the concave membrane 3. On the excavated end face of the treated wood material layer 2, the carbonization of the wood is suppressed, so the colored color will not darken due to the carbonization of the wood, and the same coloring effect as on the surface will be exerted, resulting in the formation of dents. This allows the desired color to appear on the side wall portion of the membrane 3.

On the other hand, the excavation pattern 3 is provided by irradiating a laser beam from the resin injection treated wood material layer 2 to a depth reaching the surface of the wood base material 1.
The wood base material 1 at the bottom of the pattern is carbonized by the thermal decomposition of the laser beam, and a finely uneven surface is formed due to the difference in cell density between the spring-grained and autumn-grained parts of the wood, resulting in a blackish-brown decorative surface on the bottom surface 1a. As a result, the boundary between the base material surface and the resin-injected wood material layer 2 becomes even clearer, and a decorative surface with a three-dimensional effect is formed.

The laser used is carbon dioxide, He-
Either a vaporized laser such as Ne or Ar or a solid laser such as a ruby laser may be used.

As described above, the present invention provides a method for forming a groove in a wooden base material having a resin injection treated wooden layer on the surface thereof by irradiating a laser beam to penetrate the resin injection treated wooden layer and reach the surface of the wooden base material. Since this relates to a decorative board characterized by carving a film-like pattern and exposing the carbonized wood base material surface at the concave film-like bottom, the resin-injected wood layer on the surface of the wood base material is The thermal decomposition of the wood by the laser beam is uniform, and the edges of the excavation pattern are formed into smooth and sharp straight or curved shapes, allowing the unique and delicate pattern created by laser beam excavation to be faithfully expressed. It is something.

In addition, the resin-injected wood material layer on the surface has improved physical properties such as hardness and abrasion resistance due to the injected synthetic resin, so it looks beautiful without chipping or damage at the edges of the excavated film. In addition, since the resin-injected wood material layer 2 suppresses the progress of carbonization of the wood by the injected resin, the inner side surface of the concave membrane-like interior becomes dark due to carbonization. The transparency and color of the resin-injected wooden material layer can be directly expressed on the concave membrane-like side wall surface, and the transparency and color of the convexly protruding pattern parts can be seen on the concave membrane-like side wall. It appears prominently on the wall surface, and together with the three-dimensional effect of the wood grain pattern, it provides excellent cosmetic properties.

In addition, the concave film-like bottom surface is excavated by laser beam irradiation to a depth that penetrates the resin-injected wood material layer on the surface and becomes the surface layer of the wood base material. The part is instantly vaporized by the laser beam, and the concave membrane-like bottom surface can be turned into a beautiful blackish-brown color that resembles carbonized wood at the same time as the excavation.
It is possible to obtain a decorative material rich in elegance in which the transparency of the resin-injected wood layer on the surface forming the three-dimensional pattern and the dark brown color of the base are in harmony.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view for explaining the method of the present invention, FIG. 2 is an enlarged sectional view of an excavated pattern, and FIG. 3 shows an example of the pattern obtained. The plan view and FIG. 4 are perspective views for explaining the conventional method. 1... Wood base material, 2... Resin injection treated wood material layer, 3... Concave film-like, 4... Uneven rough surface.

Claims (1)

[Scope of Claims] 1 A wooden base material having a resin injection treated wood layer on its surface is irradiated with a laser beam to a depth that penetrates the resin injection treated wood layer and reaches the surface of the wooden base material. A decorative material characterized by having a concave membrane-like pattern carved thereon and a carbonized wood base material surface exposed at the bottom of the concave membrane-like surface. 2. The decorative material according to claim 1, wherein the resin injection-treated wood material layer is made transparent or translucent by injecting and curing a transparent synthetic resin liquid into a wood veneer. 3. Claim 1, characterized in that the resin-injected wood material layer is a wood veneer that is injected with a synthetic resin and an appropriate coloring agent to be colored in any desired color.
Decorative materials listed in section.