JPS641282B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for producing a decorative veneer that can arbitrarily create an artificial straight-grain pattern from a raw material veneer that has no or hardly noticeable wood grain pattern.

[Conventional technology]

Conventional artificial wood-grain decorative veneers are produced by dyeing raw veneers with a colored or colorless adhesive between uneven templates, or by pressing and laminating them without dyeing them to form laminated frits with a desired shape. Afterwards, the wood was prepared and peeled so that the adhesive layer resembled the wood grain pattern, and it was used as a decorative veneer.

[Problem that the invention seeks to solve]

However, although the raw material veneer has a certain degree of flexibility, it is difficult to adapt to the delicate and complicated irregularities of the template, and even after lamination frizz occurs, it tends to return to its shape due to the springback phenomenon. Furthermore, the pattern pattern that appears is a monotonous wood grain pattern, a so-called board pattern, and it has not been possible to obtain a veneer with a straight grain pattern, which is considered a high-quality natural wood product.

The object of the present invention is to solve the drawbacks of the artificial wood grain decorative veneer produced by the conventional manufacturing method and to produce a veneer that closely resembles the straight grain pattern of natural wood.

[Means for solving problems]

In order to achieve this objective, the method for producing artificial wood grain decorative veneers of the present invention involves laminating a plurality of raw material veneers with substantially no wood grain pattern between a pair of flat boards via a colored adhesive. A first laminating step of gluing the laminated frit to obtain a laminated frit; a first preparing step of slicing the laminated frit in a plane having an inclination with respect to the adhesive surface layer; A first decorative veneer is obtained through a first step consisting of a scraping step to obtain a decorative veneer by scraping the surface, and a plurality of the first decorative veneers are placed between a pair of flat plates. A second lamination process in which a laminated flitch is obtained by laminating and adhering the laminated flitch through an adhesive, and the adhesive surface layer of the laminated flitch is flattened so that it has an inclination with respect to the adhesive surface layer so that it appears as a surface pattern. A second decorative veneer is produced by repeating the second process, which consists of a second preparation step of slicing and a scraping step of scraping the surface of the prepared laminated fritches to obtain a decorative veneer, once or several times. Characterized by obtaining a board.

Hereinafter, the present invention will be explained in detail with reference to manufacturing process diagrams.

FIG. 1 is a schematic diagram showing changes in laminated fritches and raw material veneers in the process of producing artificial wood-grain decorative veneers with a straight-grain pattern by the method of the present invention.

First, as shown in FIG. 1a, a raw material veneer 1 with a flat crimped surface (not shown) and with no or hardly noticeable wood grain pattern is processed through the first lamination process, as shown in FIG. 1a. Pressure lamination is bonded to the laminated frits through the colored adhesive layer 2. Next, as shown in FIG. 1b, the material is prepared in a first material preparation step so that the laminated fritsch adhesive layer obtained in the first lamination step has the desired first straight grain pattern. That is, the laminated flitch is sliced in a plane at an angle with respect to the adhesive surface layer so that the adhesive surface layer appears as a surface pattern. Subsequently, as shown in FIG. 1c, a primary decorative veneer 3 is obtained by removing the surface of the fritches obtained in the primary preparation process in a primary scraping process.

With only the steps up to this point, the straight grain of the first decorative veneer 3 has sparse grain intervals and is not similar to normal straight grain. Therefore, the above steps will be repeated.

In this case, as shown in Figure 2, the first decorative veneer 3
When sawing wood from the frits of the second laminated layer, the method shown in Figure 3a is to cut with the cutting surface of the wood slanted downward to the right, or the method is to cut with the cut surface slanted downward to the left. By scraping off the fritches obtained by the method shown in Figure 4a,
the second as shown in Figure 3b or Figure 4b respectively;
Next, decorative veneers 4, 4' can be obtained. That is,
To obtain a wood grain pattern that closely resembles the straight grain of natural wood as shown in Figure 3 c or Figure 4 c, by the direction of sawing of the laminated fritsch in the second preparation step of Figure 3 a or Figure 4 a. I can do it.

In the above invention, the raw material veneer 1 used
For this purpose, use a veneer with a thickness of about 0.3 to 1.0 mm that has no wood grain pattern at all or is hardly noticeable, and is either dyed or undyed to obtain the desired wood grain color. These tree species include
Veneers such as agathis, lauan, china, and lamin are used, but when making a grain pattern, hard materials such as lamin tend to break during the secondary lamination process. Moreover, it is difficult to scrape off, so it is not preferable.

As the colored adhesive, a suitable amount of a colored pigment is mixed into a commonly used room temperature curing wood adhesive such as urea, melamine, or vinyl acetate resin. In addition, when using dyed raw material veneer 1, the grain pattern of the first decorative veneer will strongly appear on the desired surface of the decorative veneer, so a slightly larger amount of coloring pigment should be added to the adhesive used for the second lamination. It is necessary to add it to the veneer to give it a dark color that rivals the veneer color.

The amount of adhesive applied is on one side of the raw material veneer.
It is best to apply about 100-130g/ ^m2 .

The pressing conditions for these veneers are, for example, room temperature, 10 to 30 kg/cm ² , and about 6 to 12 hours.

The laminated fritches are then prepared at a required angle so that the desired pattern appears on the surface of the laminated fritches. A regular band saw or circular saw is used as the sawmill.

Next, the prepared fritsch is stripped into a decorative veneer using a stripping machine such as a commonly used slicer. The thickness of decorative veneer is usually about 0.3 to 1.0 mm.

〔Example〕

100 sheets and 300 sheets of 2 types of dark red lauan veneers with thicknesses of 0.8 mm and 0.4 mm, a total of 400 sheets, and 100 to 120 sheets of amino resin adhesive mixed with a red-black coloring agent.
g/ ^m2 , laminated between flat plates, 15Kg/m2 at room temperature.
Pressure bonding was performed for 12 hours at a pressure of cm ² to form a first laminated frit. Next, the laminated fritches are prepared at a desired angle so that the adhesive layer has the required first-order straight-grained pattern on the fritch surface, and then that surface is scraped to a thickness of 0.6 mm. A primary decorative veneer was obtained.

Next, the first decorative veneer is again coated with an amino-based resin adhesive mixed with a red-black colorant to make the grain direction uniform, and the second layer is laminated using a flat board in the same direction as the first layer. A laminated fritsch was obtained. The lamination conditions are the same as those for the first lamination.

Then, the laminated fritchi is re-angled and prepared so that the adhesive layer has the desired final straight-grained pattern, and is then stripped to create an artificial wood grain finish with a thickness of 0.4 mm that closely resembles the desired natural rosewood straight-grained pattern. I got a veneer.

It goes without saying that if the number of times the veneer is laminated and peeled is increased to three or four times, the resulting straight grain pattern will become even denser.

〔Effect of the invention〕

As described above, in the present invention, a plurality of raw material veneers having substantially no wood grain pattern are used, and these are laminated and bonded between a pair of flat plates via a colored adhesive to obtain a laminated frit. Then, the laminated fritches are sliced in a plane at an angle with respect to the adhesive surface layer, and the surfaces of the laminated frits obtained by laminating these are scraped to obtain a decorative veneer twice or more times. I am trying to repeat the above. This makes it possible to reproduce an artificial wood grain decorative veneer with a complex and subtle straight-grain pattern similar to that of natural wood. Therefore, in one lamination and stripping process, the veneer is subjected to strong pressure (30 to 50
Compared to the conventional manufacturing method of forcibly pressing the veneer at a pressure of 1 kg/cm ² ), there is less deterioration in the quality of the raw veneer, and large-scale pressing equipment is not required.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing the first step of producing an artificial wood grain decorative veneer according to the present invention, and Fig. 2 is a front view of a laminated fritchi obtained by laminating the first decorative veneer obtained in the first step. 3 and 4 are explanatory diagrams showing the second step of the present invention, respectively. 1: Raw material veneer, 2: Adhesive layer, 3: First decorative veneer, 4, 4': Second decorative veneer.

Claims (1)

[Claims] 1. A first lamination step in which a plurality of raw material veneers having substantially no wood grain pattern are laminated and bonded between a pair of flat plates using a colored adhesive to obtain a laminated frizz. , a first preparation step of planarly slicing the laminated fritches in a state having an inclination to the adhesive surface layer; and a stripping step of scraping the surface of the prepared laminated fritches to obtain a decorative veneer. A first decorative veneer is obtained through the first step, and a plurality of the first decorative veneers are laminated and bonded between a pair of flat plates via a colored adhesive to obtain a laminated frit. A second lamination process, a second preparation process of slicing the laminated fritches in a plane at an angle with respect to the adhesive surface layer so that the adhesive surface layer appears as a surface pattern, and the above-mentioned preparation process. An artificial wood grain decorative veneer characterized in that a second decorative veneer is obtained by repeating a secondary step consisting of a stripping step of scraping the surface of the laminated frits to obtain a decorative veneer once or several times. manufacturing method. 2. Claim 1, characterized in that the plurality of raw veneers without wood grain patterns are dyed veneers.
A method for producing an artificial wood grain decorative veneer as described in section.