JPS637152B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a decorative board having a beautiful colored pattern, which is made by filling and fixing a synthetic resin into a concave pattern engraved 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 wood is simply carved with a laser beam, the edges will be distorted, depending on the tree species, and even if such a pattern is filled with synthetic resin and a colored pattern is formed, the pattern will be distorted. It lacks sharpness and has insufficient cosmetic properties, and the filled resin liquid penetrates into the wood around the excavated pattern, causing the colored pattern to bleed. There was a drawback that the formed convex pattern part could be chipped by a slight external force.

The present invention eliminates the drawbacks and problems of decorative wood materials produced by laser processing.
Specifically, a resin-injected thin wooden board is integrally attached to the surface of a wooden substrate, and a laser beam is irradiated from the surface of the resin-injected wooden board to penetrate through the resin-injected thin wooden board and reach the wooden substrate. This decorative board is made by excavating and forming a deep concave pattern, filling and hardening synthetic wood into the concave pattern, and then fixing and integrating the filling resin to the wooden base material.The edges of the excavated pattern are sharpened by laser processing. To provide a decorative board which has a beautiful decorative surface without oozing out of the filling resin from the excavated pattern, and has excellent durability without causing the filling resin to fall off or damage to the wood parts.

Embodiments of the present invention will be explained with reference to the drawings: 1
is a wooden substrate made of plywood, LVL, particle board, fiberboard, etc. with a thickness of about 5 to 20 mm, and a resin-injected thin wooden board 2 (hereinafter referred to as (referred to as WPC thin plate) is attached.

3 is a concave pattern excavated by laser beam irradiation, which penetrates the WPC thin plate 2 and forms the wooden substrate 1.
It is engraved to a depth that reaches the surface layer.

The side wall 4 and edge 5 of this concave pattern 3 are made of WPC
It is made of a thin plate and is thermally decomposed uniformly by laser beam irradiation, so it is formed with smooth side walls and sharp edges.

The bottom surface of the recess pattern 3 is formed by irradiating a laser beam to a depth that reaches the wooden substrate 1, and as a result, the surface layer of the wooden substrate 1 is thermally decomposed by the laser beam irradiation, reducing the density of the spring wood portion, etc. The lower part of the groove is formed into an uneven rough surface 6 which is deeply excavated.

Reference numeral 7 denotes a synthetic resin which is entirely embedded in the recess pattern 3, and an appropriate synthetic resin liquid such as a transparent or semi-transparent synthetic resin liquid or a colored synthetic resin liquid is applied to the recess pattern 3.
The wood base material 1 is made by filling and solidifying the resin, and the bottom of the filled resin is exposed on the bottom of the concave pattern.
It is solidified while biting into the uneven rough surface of the wood base material 1, and is firmly fixed and integrated with the wooden base material 1, and the surface is formed into a smooth surface flush with the protruding surface of the concave pattern 3.

The WPC thin board 2 in the decorative board 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. is used, and its thickness depends on the depth of the concave pattern to be formed, but the thickness is 0.5
It is preferable to use a material with a thickness of 5 mm or more in order to increase the surface hardness, and a thickness of 5 mm or less is preferable because it is possible to carve a concave pattern using a laser beam in a short time.

In addition, the amount of resin liquid injected into the WPC thin board varies depending on the wood species of the thin wood board, but it is best to use it at a weight ratio of about 60 to 150% of the thin wood board so that the edges of the concave pattern created by the laser beam become sheep. preferable.

Excavation of the concave pattern 3 by irradiation with a laser beam can be carried out by moving the laser beam so as to draw the character or pattern if it is a relatively simple letter or pattern, but as shown in FIG. In the case of a complicated pattern 3', a masking material or the like having a through hole with the same pattern as the concave part of the pattern is placed on the surface of the WPC thin plate 2, and a laser beam is irradiated from above to form the through hole. A corresponding excavation pattern may be engraved.

Synthetic resin is injected into the wood of WPC thin plate 2,
Because it is hardened, the density difference between spring and autumn grains is equalized, and the laser beam can thermally decompose the wood evenly.

In other words, since the energy of the laser beam required for thermal decomposition is greater than the synthetic resin, the wood can be excavated uniformly without being affected by the density difference between the spring and fall parts of the wood.
The edges 5 of the concave pattern 3 excavated in the thin plate 2 are formed sharply, and the carbonization of the wood is suppressed, resulting in a uniform decorative surface from the side wall portion 4 of the pattern 3 to the surface without discoloration. This is the result.

On the other hand, since the concave pattern 3 is provided to a depth that penetrates the WPC thin plate and reaches the surface of the wooden substrate 1, the wooden substrate 1 is carbonized by the laser beam, and the bottom surface is made of wood. A dark brown finely uneven rough surface 6 is formed due to the difference in cell density in the eye area.

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.

After the recess pattern 3 is provided in this manner, an appropriate synthetic resin liquid is filled into the recess pattern 3 and solidified to embed the recess pattern 3.

At this time, since the WPC thin plate 2 is attached to the surface of the wooden base 1, the filling resin liquid does not seep into the upper surface layer of the decorative board, and the boundary between the concave pattern 3 and the filling resin becomes clear, and the pattern is clearly visible.

Further, the filling resin is fixed in a state where it bites into the wooden substrate exposed at the bottom of the concave pattern and the rough surface of the concave and convex portions,
It has increased adhesion to the substrate and will not peel off due to impact or the like.

As described above, the present invention creates a concave pattern deep enough to penetrate the resin-injected thin wooden board and reach the wooden substrate by irradiating a laser beam onto a wooden substrate on which a resin-injected thin wooden board is attached. This relates to a decorative board made by filling and solidifying a synthetic resin into the recessed pattern, and then fixing and integrating the filled resin to a wooden substrate. Due to uniform thermal decomposition of the resin-injected thin wood board in the surface layer, its edges are formed into sharp, clear lines and curves, and the physical properties such as hardness and abrasion resistance are enhanced by the injected resin. Even if the pattern is minute and complicated, it can eliminate chipping or damage to the pattern.

In addition, since the synthetic resin 7 is integrally filled into the concave pattern 3, the entire surface of the decorative board is smoothed, and even if dust or the like adheres to it, it can be easily wiped off. The synthetic resin injected into the patterned area gives it a remarkable transparency and makes the wood grain pattern appear three-dimensional, and these and the synthetic resin in the concave pattern create a beautiful makeup with an excellent design appearance. In addition, the synthetic resin in the concave pattern does not leak into the resin-injected thin wood board, and the border with the pattern edge appears clearly, creating an inlay-like makeup, making it suitable for various crafts and decorative materials. ,furniture,
It can be used as a building material to add luxury and taste.

Furthermore, since the bottom surface of the concave pattern 3 is formed into a finely uneven surface by carbonization on the surface of the wooden substrate 1 using a laser beam, the adhesive force with the synthetic resin 7 filled in the concave pattern 3 is strong, and it can be peeled off. It is highly durable and has no risk of damage.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a perspective view thereof, Fig. 2 is a partially enlarged cross-sectional view, Fig. 3 is a plan view when a complex pattern is provided, and Fig. 4 is a diagram illustrating an example of the present invention. It is a perspective view of a conventional example. 1...Wood base material, 2...Resin injection treated wood board,
3... Concave pattern, 5... Edge, 6... Uneven rough surface, 7... Synthetic resin.

Claims (1)

[Claims] 1 A concave pattern deep enough to penetrate through the resin-injected thin wooden board and reach the wooden substrate by irradiating a laser beam onto a wooden substrate with a resin-injected thin wooden board attached to the surface, A decorative board made by filling and solidifying synthetic resin into the concave pattern, and then fixing and integrating the filled resin with a wooden substrate.