JPS5845926B2 - Manufacturing method for uneven wood veneer - Google Patents

Description

[Detailed Description of the Invention] The present invention is a method for manufacturing uneven wood veneer, and its purpose is to create concavities in the summer wood part and depressions in the spring wood part along the grain of the wood veneer. To provide a widely used method for manufacturing uneven wood veneer board, which can easily form an uneven shape.

Conventionally, the method of forming unevenness on the surface of a wooden board is to heat the surface of the wooden board, and create depressions in the spring wood, which is easily flammable, and depressions in the hard, hard-to-flammable summer wood. In addition, by applying concentrated sulfuric acid, concentrated hydrochloric acid, etc. to the surface of the wooden board, the spring wood parts that are easily attacked by chemicals are made into depressions, and the summer wood parts that are less likely to be attacked by chemicals are made into depressions to reduce unevenness. The technology provided was widely known.

However, in order to impart unevenness using the conventional manufacturing method described above, the wood board needs to have a thickness of 57#1 or more, which is impossible.
．． 2myn to 2. Orrtm's thin wood veneer had the disadvantage that it was not possible to impart irregularities to it.

Therefore, by stacking multiple wood veneers with the same fiber direction and compressing them from the top and bottom, the hard part of the wood veneer, the summer wood, is replaced with the soft part of the adjacent wood veneer, the spring wood. A technique has been proposed in which the uneven shape of the wood veneer is given by digging into the wood veneer, but the uneven shape of the wood veneer obtained by this manufacturing method does not necessarily match the grain of the wood veneer. It was extremely difficult to form a uniform uneven shape because the depth of the unevenness was not constant along the surface.

The present invention has been made for the purpose of eliminating all such drawbacks in the above-mentioned manufacturing method.

Hereinafter, the present invention will be explained in detail based on the embodiments shown in FIGS. 1 and 2.

The present invention provides a plate-shaped cushioning material 1 having a hardness of 50° to 90°.
and a straight-grained wooden veneer 2 with a thickness of 0.2 rrrm to 2.0 rran made from coniferous trees such as Japanese cedar, Japanese pine, and Japanese toga, and press them from above and below using presses 3, 3. Pressure 10 to 40% (preferably 2
Cushion of wood veneer 2 is pressed under the following conditions: 0 to 30 degrees centigrade), temperature 60 to 180 degrees Celsius (preferably 1400 to 150 degrees Celsius), and time 30 seconds or more (preferably 60 seconds or more). This is a method for manufacturing an uneven wood veneer 4 in which a concave-convex shape is formed on the surface in contact with the material 1, with the spring material part being a depression and the summer material part being a depression.

In addition, silicone rubber, white rubber urethane resin, etc. are suitable as materials for the cushioning material 1 used in the present invention, and its thickness is approximately the same as the thickness of the wooden veneer 2 to which unevenness is provided. It is desirable that it be about double that.

Further, if the hardness is 90° or more, it is difficult to impart sharp unevenness to the wood veneer, and in order to impart sharp unevenness, it is necessary that the hardness is 90° or less.

In the present invention, the reason why the clamping pressure is set to 10% or more is that when the pressure is 10% or less, the average unevenness depth (the depth from the top of the convex surface to the bottom of the recess) is measured at 10 points. This is because the measured average value (the same applies hereinafter) becomes extremely low and the uneven state cannot be sufficiently felt visually or tactilely.

As a rule of thumb, it is known that the unevenness of a wooden veneer can be felt visually or by touch when the depth of the unevenness is 40 μm or more.

In addition, if the pressure is 30 μm or more, the average unevenness depth is 160 μm.
When the pressure exceeds 40%, the pressure becomes almost constant, and in particular, if the pressure exceeds 40%, the wood fibers of the wood veneer will break, which is not preferable.

In addition, the reason why the compacting temperature is set to 600 or higher is because, as shown in Figure 4, when the temperature is 60°C or lower, the average depth of depressions and depressions is extremely low (as a result, the unevenness cannot be sufficiently felt visually or tactilely). It is.

In addition, when the temperature is 150℃ or higher, the average unevenness depth dimension is also 16
It is almost flat at 0 μm, and especially if the temperature exceeds 180° C., the surface of the wood veneer will be burned, which is not preferable.

Also, the reason why the clamping time was set to 30 seconds or more is shown in Figures 3 and 4.
As shown in the figure, if the pressing time is 30 seconds or less, even if the compacting temperature and compacting pressure water are increased, the average depth dimension will be low and the unevenness will not be sufficiently felt visually or tactilely.

In particular, in the case of 60 seconds or more, the average unevenness depth dimension is also large (which is preferable).

The graphs in Figures 3 and 4 are made using straight-grain rice veneer with a thickness of 1.0 mm, and with a thickness of 1.5 mm as a cushioning material.
Using silicone rubber, uneven wood veneers were created by changing the pressure, temperature, and time, and the average depth of unevenness was measured. Lines A, B, C, and D indicate the pressure. These are the measured values when the closing time was 20 seconds, 30 seconds, 60 seconds, and 90 seconds.

As for the wood veneer used in the present invention, straight-grained coniferous veneer in which the spring wood portion and the summer wood portion are relatively clearly separated as in the above embodiment is suitable, but of course, coniferous wood veneer with the straight-grained wood is suitable. An uneven shape can be formed by using a hardwood veneer, and an uneven shape can also be formed by using a hardwood veneer.

As described above, the present invention combines a cushioning material with a hardness of 90 degrees or less and a wooden veneer, and also applies pressure of 10% or more.
Because the pressure was applied at a temperature of 60°C or higher and for a time of 30 seconds or more, the summer wood part had a convex surface and the spring wood part had a concave surface on the surface that was in contact with the wooden veneer cushioning material. Sharp uneven shapes that follow the wood grain pattern can be easily imparted.

In addition, since the spring material is compressed and hardened, even if it is a soft wood veneer, the hardness of the entire wood veneer will improve, making it suitable for flooring, exterior materials, etc. that require wear resistance. It can be used for cosmetic purposes.

In particular, as shown in FIGS. 5 and 6, a wooden veneer 2 is placed on a substrate 5 such as plywood, chipboard, or an inorganic board with an adhesive interposed therebetween, and a hardness of 900 is applied onto the wooden veneer 2. If the following cushioning materials 1 are overlapped and pressed together under pressure LO% or more, temperature 60℃ or more, and time 30 seconds or more,
A decorative board 6 having an uneven shape along the wood grain formed on the surface of a wooden veneer 20 serving as a surface decorative layer can be easily produced.

[Brief explanation of the drawing]

Figures 1 to 4 are drawings according to the present invention, in which Figure 1 is a side view showing the state in which the uneven wood veneer is being made, Figure 2 is a sectional view of the uneven wood veneer, and Figure 3 is a cross-sectional view of the uneven wood veneer. The pressing temperature is 145℃
A graph showing the relationship between the compaction time, compaction pressure, and average unevenness depth dimension in the case of . Figure 4 shows the compaction time, compaction temperature, and average depth dimension when the compaction pressure is 25 mm. 5 and 6 are drawings related to a decorative board using the manufacturing method of the present invention, and FIG. 5 is a side view showing the state in which the decorative board is being produced; Figure 6 is a sectional view of the decorative board. DESCRIPTION OF SYMBOLS 1... Cushion material, 2... Wood veneer, 3-Press, 4... Uneven wood veneer, 5... Substrate, 6... Decorative board.

Claims (1)

[Claims] 1 Cushion material with a hardness of 90°C or less and a wooden veneer are layered together and pressed under pressure of 10% or more, temperature of 60° or more, and time of 30 seconds or more to form unevenness on the surface of the wooden veneer. A manufacturing method for uneven wood veneer.