JPH0739082B2 - Wood veneer repair method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for repairing a wood veneer particularly used for manufacturing an artificial decorative veneer.

[Background technology]

After toning (bleaching, dyeing, etc.) wood veneers such as rotary veneers, multiple sheets of them are loaded with colored adhesives and pressure-bonded to create laminated flitch, which is sliced to natural wood. In the method of manufacturing a decorative veneer that artificially expresses a wood grain pattern similar to the above, there are drawbacks (clauses, insect holes,
Efficient removal of stains, tars, etc. to repair wood veneer is important for improving yield.

As shown in Fig. 5, the normal repair method for wood veneer is a hole in which defects in wood veneer 20 are mechanically removed by punching or the like.
A repair veneer 22 having substantially the same shape as the hole 21 is fitted into the hole 21. However, wood veneer 20 and repair veneer 22
The color is slightly different from that of, and a gap 23 is formed between the wood veneer 20 and the repair veneer 22 as shown in FIG. 6, and the adhesive enters the gap 23 during stack molding. For,
As shown in FIG. 7, a wood veneer portion 26 and a repair veneer portion 27 are formed on the surface of the decorative veneer 25 obtained by laminating and slicing.
There was a problem that the boundary between and became clear and the natural feeling was lost.

[Object of the Invention]

An object of the present invention is to provide a method for repairing a wood veneer that makes the repaired part of the wood veneer inconspicuous.

[Disclosure of Invention]

The method of repairing a wood veneer of the present invention is to insert a repair veneer into a hole in which defects in the wood veneer are removed, and then fill the gap with a bonding agent to bond the repair veneer. It is characterized by.

As described above, according to the present invention, the gap between the repair veneer fitted in the wood veneer and the wood veneer is filled with the bonding agent, so that the adhesive is prevented from entering the gap during the adhesive bonding. It is possible to make the repaired part in the decorative veneer inconspicuous.

The wood veneer used is one previously dyed with an acid dye or a direct dye. As the repair veneer to be fitted into the hole in which the defects of the wood veneer are removed, the veneer used is made of the same material as the wood veneer and dyed in almost the same color. The size of the repair veneer should be 2mm or less when fitted into the hole. If the gap is larger than 2 mm, the filling agent to be filled becomes conspicuous and the bonding strength of the repair veneer becomes poor, which is not preferable.

Examples of the bonding agent include polyvinyl acetate and ethylene-
Examples of the hot-melt thermoplastic resin include vinyl acetate copolymer (hereinafter referred to as EVA) and polyamide. The bonding agent is melted in advance and poured into the gap between the wood veneer and the repair veneer to fill it. At this time, the filled bonding agent penetrates into the adjacent wood veneer and the repair veneer, exudes the dye dyed to these veneers, and solidifies.
Therefore, as shown in FIGS. 1 and 2, the adhesive does not penetrate into the gap between the wood veneer 1 and the repair veneer 2 at the time of the laminated bonding, and the solidified bonding agent is used. The dye exuded from the veneers 1 and 2 is mixed in 3 so that the joint A becomes blurred and the repair trace becomes inconspicuous.

The wood veneer 1 thus repaired is combined with a wood veneer 1'which has no defects as shown in FIG. 3, and a plurality of the wood veneers 1 are stacked in the concavo-convex mold 6 through a colored adhesive and pressure-bonded. As a result, the assembled flitch 4 is made, and the assembled flitch 4 is sliced from a predetermined direction to obtain the decorative veneer 5. This decorative veneer 5 is
As shown in FIG. 4, the repaired portion 7 becomes inconspicuous and becomes very natural and natural.

Next, the present invention will be described with reference to Examples and Comparative Examples.

Example: A wood veneer (Agathis material, thickness 1.0 mm) was dipped in a dye solution (bath ratio 40) and heat treated at 90 ° C. for 2 hours to dye. As the dye solution, a 0.2% solution of Suminol Milling Brown 5R was used. A repair veneer of the same material was also dyed in the same manner. However, the staining solution is 0.2 for Suminol Milling Brown 3G.
% Solution was used.

Fit a repair veneer of the same shape as the hole into the hole from which the defects in the stained wood veneer were removed, and use EVA as a bonding agent in the gap.
(Toyo Soda Kogyo Co., Ltd. Ultrasen 722) at 200 ℃
What was melted in was filled, and it was solidified as it was. As a result, EVA penetrated into the adjacent veneer, and the dye dyed on the veneer leached out, resulting in a blurred joint.

The repair veneer thus obtained is combined with another veneer veneer, and a plurality of the wood veneers are stacked via an adhesive and pressure-bonded with a concave-convex shape to form an assembled flitch, which is sliced from a predetermined direction. Then, a decorative veneer was obtained. The resulting decorative veneer is No. 4
As shown in the figure, the repaired part 7 was inconspicuous and had a natural and natural feeling.

Comparative Example: As shown in FIG. 8, the same repair veneer 22 as in the example is fitted into the hole 21 in the veneer veneer 20 similar to that in the above example, from which the defects have been removed. After stopping, a plurality of sheets were stacked in combination with other wood veneers and pressure-bonded to form an assembled flitch, which was sliced to obtain a decorative veneer. In the obtained decorative veneer, as shown in FIG. 8, the adhesive enters the gap between the wood veneer part 26 and the repair veneer part 27, and the wood veneer part 26 and the repair veneer part
Due to the subtle color difference from 27, the repaired part becomes clear,
A pattern different from that of natural wood was formed.

〔The invention's effect〕

According to this invention, the gap between the repair veneer and the wood veneer fitted in the veneer is filled with the bonding agent, so that the adhesive can be prevented from entering the gap during the laminated bonding. The effect is that the repaired part in the decorative veneer can be made inconspicuous.

[Brief description of drawings]

FIG. 1 is a perspective view of a repaired wood veneer according to the present invention,
Fig. 2 is a sectional view taken along the line II-II, Fig. 3 is a process explanatory view for obtaining a decorative veneer using the wood veneer of Fig. 1, and Fig. 4 is a plan view of the obtained decorative veneer. Fig. 5 is a perspective view of a wood veneer repaired by a normal method, Fig. 6 is a sectional view taken along the line VI-VI, and Fig. 7 is a makeup obtained by using the repaired veneer shown in Fig. 5. FIG. 8 is a plan view of the veneer, and FIG. 8 is a perspective view showing a temporarily fixed state of the veneer for repair. 1,1 ′, 20 …… Veneer veneer, 2,22 …… Repair veneer, 3 …… Bonding agent, 21 …… Hole, 23 …… Gap

Claims (3)

[Claims] 1. A wood veneer characterized in that a veneer for repair is fitted into a hole from which defects in the wood veneer are removed, and then a gap is filled with a bonding agent to bond the veneer for repair. How to repair a board. 2. The method of repairing a wood veneer according to claim 1, wherein the wood veneer and the repair veneer are previously colored with an acid dye or a direct dye. 3. The bonding agent is a thermoplastic resin, the resin is melted and filled in the gap, and the dye is exuded from the adjacent wood veneer and repair veneer to blur the joint. Patent A method for repairing a wood veneer according to claim (2).