JPS5979707A - Manufacture of aggregate veneer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field] This invention belongs to the field of veneer assembling techniques, which artificially express wood grain by assembling wooden car boards.

1 Background Art] The technique of assembling veneers has been known for a long time, and it has become possible to supply the product industrially.

However, it is not a completely established technology, and efforts are still being made to improve it.

The main challenge at the technical fair is how to reproduce a wood grain that approximates natural wood grain.

To this end, attempts have been made to examine dyeing methods for the veneer material, to devise ways to dye the adhesive, and to perform various intermediate treatments on the veneer material.

For example, natural oak wood has a high interstitial content,
Furthermore, the nonporous region containing the radial tissue exhibits a unique structure. In order to express this on a veneer assemblage, the aim will not be achieved if the jonin is only trying to do so.

The methods that have been tried in the past to express the appearance of natural oak wood have been as follows. There was a hole with a width of 0.3 mm to 0.5 mm and a length of 5 to 50 llm, and the hole was filled with a filler such as adhesive. However, in the case of assembled cars obtained in this way, when wiping paint is used to color the base, the non-porous areas are markedly colored, and the fidelity to the natural one is significantly reduced. This means that the veneer, which is easily dyed, has a car slope density of 0.5.
In the following, natural oak wood etc. are O. Since G is 0.7, the difference in density due to the difference in density causes the non-porous area to be significantly colored when wiping coating is applied.

As a second method for improving the density of the veneer and reducing the discoloration of wiping, the following force method can be considered.

First, a bamboo-colored veneer is pressed with a flat plate with an adhesive interposed to prepare a recycled veneer slope, and this is used as a veneer slope for the non-porous area to create a laminated veneer. At this time, when creating recycled veneers, pieces of wood are inserted between the raw stone veneers in advance to create recycled veneers. Wood pieces with a thickness of 0.3 to 0.51 mm and an arbitrary width are used for every 2 to 3 pieces of raw material veneer. By slicing the fη fritsch in this way, the desired laminated veneer can be obtained.

Regarding the second laminated veneer, the density of the non-porous area 15 is improved due to the adhesive layer and the inclusion of adhesive in the veneer, and the coloring property due to wiping is reduced. Compared to other materials, it is more likely to be colored, and due to the darkening of the surface of the dyed Rinφ, the bonding interface of the veneer stands out when used for non-porous areas, resulting in a decrease in fidelity. there were.

[Objective of the Invention] This invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a laminated veneer having an appearance and coloring property including a radiation structure similar to that of natural veneers. .

[Disclosure of the Invention] The present invention involves assembling and slicing raw veneers to create recycled veneers, and laminating and pressing the recycled veneers with an adhesive and further with wood chips interposed. The unique feature is that a fritsch for the perforated area is made, and then it is sliced and used as a veneer for the non-perforated area.

[・This will be further explained by N'f. with reference to the drawings. L＜Explanation→ru.

FIG. 1 is a process diagram for manufacturing a recycled wheel ramp. In this figure, 1 is the original 1'4 veneer, 2 is the adhesive layer, and 3 is the flat plate type q.
tr, 4 is a flat plate fritsch, 4a is a cutter for slicing, 5
is recycled veneer.

In the present invention, as shown in FIG.
Create. Next, slice the primary flat plate in the straight grain direction to 1/l? ．． A recycled veneer 5 is created.

This operation can be repeated any number of times.

4) The recycled veneer is pressed again with the flat plate 3 to create a secondary flat plate frit, and then sliced in the straight grain direction to give a secondary recycled veneer. Below 3 as necessary
Repeat for the next and fourth time. However, two repetitions are most preferred.

Next, the recycled veneers 5 obtained as described above are laminated with an adhesive interposed as shown in FIG. Create board 7. However, at that time, a thin piece of wood 6 is sandwiched and pressed between the recycled wheel slopes 5 so as to intersect with the fiber direction of the recycled veneer to create a fringe 5a for the non-porous area, and this fritchi 5a is sliced in the straight grain direction. The recycled veneer is used as the veneer 7 for the non-porous area.

On the other hand, as shown in FIG. 3, it is combined with a separately prepared hole area wheel plate 8 and laminated with an adhesive interposed therebetween.
The final fritches 8a are created by sandwiching and pressing between molds i7a having convex and convex curved surfaces, and then this is sliced to form wheel assembly plates 9. This is then subjected to wiping coating as appropriate. FIG. 4 is a process diagram showing the state of wiping.

In the above, although the recycled car plate 5 is not intended to be limiting,
Its thickness is 0.3~l. ou+ and Zuru. Further, the thickness of the wood piece 6 is 0.3 to 0.3 mm, although this is not intended to be limiting.
There will be 5 dragons. Its width is arbitrary. But Tatene short IIl
Preferably, it has a shape of . It is preferable that the wood pieces 6 are sandwiched between every two to three pieces of recycled veneer in a direction that intersects with the fiber direction of the Hyakusei veneer, but this is not limiting either.

There are no limitations on the manufacturing method of the veneer 8 for the hole area. In short, any medium plate designed to express the pore area will suffice, but for example, wood powder is sprinkled on the surface of the raw material veneer, and then this is glued to form a flat plate. The veneer is sandwiched between plates and pressed, and sliced in the straight grain direction to obtain a clay veneer in which the wood flour part and the plain slope part flow in lines alternately, and this is used as the veneer 8 for the hole area. The specific details of the manufacturing method will be discussed in Examples.

By doing the above, the apparent density of the veneer increases, giving it a hard feel. As a result, paint absorption during wiping painting is reduced, and the paintability approaches that of natural paint.

Furthermore, since wood chips are inserted during the creation of the slopes for non-porous areas, it is possible to express a radial structure on the laminated veneer, and the paintability when wiping is also close to that of natural wood.

In addition, as the adhesive used in the second step, it is preferable to use a colored adhesive containing a coloring agent in order to reduce the conspicuousness of the laminated interface. Then playback Q
>Coupled with the fact that the plate is created by repeating flitting and slicing several times, the laminated interface becomes less noticeable and the uniformity increases.

Next, an example will be described.

Example: Thickness 1.01 obtained from agathis, a coniferous tropical wood.
The rotary veneer was decolored with a hydrogen peroxide bleaching agent to give it the color tone of natural oak, and then dyed with an acid dye to produce the raw material veneer. The moisture content of this veneer is 30 to 50.
adjusted to %.

Next, the pigment composition of the urethane adhesive is determined so that the composite color of the surface color of the raw material veneer and the colored adhesive applied to the surface of the raw material veneer becomes the internal color of the raw material veneer. was interposed between the veneers and pressed together in a flat plate mold to obtain a flat plate frit. The pressing conditions were a pressing pressure of 10 kg/cml, an adhesive application amount of 100 g/m, and a pressing time of 2 hours. The obtained flitch is 0.3 to Q. in the straight grain direction. A recycled veneer was obtained by slicing it to a thickness of 5 mm (Figure 1).

This veneer was pressed again in a flat plate mold using the above adhesive under the same conditions to obtain a non-porous area frit. Separately, the previously obtained recycled car was cut into pieces of 5 to 20 pieces of wood, which were used to express the radiation structure. Next, the wood pieces were inserted into every 2 to 3 recycled veneers so as to intersect with the fiber direction of the veneers, and the pieces were laminated and pressed together (Figure 2).
. The obtained flitch is rolled in the straight grain direction by 0.8-1. Slice into Ou+ thickness. This veneer will be used as the veneer for the non-religious area.

On the other hand, as a single temporary for the hole area, the previously obtained 0.3 to 0.5
Urethane-based adhesive was applied to both sides of sliced veneers with a thickness of mm, and the veneers were laminated and pressed in a flat plate with a piece of wood interposed between the veneers. The conditions for compaction are wood powder particle size of 20~
40 menosh, wood flour addition amount 50-100g/m, adhesive application amount 180+20g/m (on both sides), pressing pressure 1.5
kg/cm, and the pressing time was 3 hours.

Slice the fritsch obtained above in the straight grain direction (0
．． The obtained veneer was used as a veneer for the hole area.

Next, the veneer plates for the non-regular area and the veneer plates for the hole area were laminated and pressed alternately in a mold having an uneven curved surface using a urethane adhesive (Figure 3). Clamping strip image 1 has a clamping pressure of 15 kg/
cl, coating weight was 80 g/rd, and pressing time was 3 hours.

The obtained fritchi was sliced into 0.6 ms thick slices so that the grains appeared to obtain laminated veneers. The appearance of the iq-grown veneer was highly faithful to nature, consisting of a pore zone with three-dimensional concentrated conduits and a non-pore zone with a radial structure (Figure 4).

Furthermore, when wiping coating was applied to the obtained sliced veneer for base coloring, the pore area was markedly colored, while the non-porous area was less likely to be colored, showing paintability true to nature.

[Effect of the invention] This invention integrates the raw material veneer with a flat platen,
The process of slicing so that the straight grain appears is repeated an arbitrary number of times to create a recycled veneer. Next, this recycled veneer is laminated with wood pieces interposed, pressed into a body, and sliced so that the straight grain appears. In the process of preparing a veneer for the non-porous area, on the other hand, the separately prepared veneer for the perforated area and the veneer for the non-porous area are combined and laminated, and sandwiched between mold plates having uneven curved surfaces. It is now possible to faithfully reproduce the appearance and coloring characteristic of natural wood grain, which is characterized by the integration and slicing processes.

[Brief explanation of the drawing]

Figure 1 is a process diagram showing the process of manufacturing recycled veneer in the manufacturing method according to the embodiment of the present invention, Figure 2 is a process diagram for manufacturing recycled veneer, and Figure 3 is the process of manufacturing laminated veneer. Figure 4 is a perspective view of the intermediate plate assembly showing the state of wiping. The raw material veneer 2 is a colored adhesive layer 3 is a flat plate, the mold plate 4 is a flat plate, the flitch 5 is a primary recycled veneer 6, the wood piece 7 is a veneer for non-porous areas 8, the veneer for a perforated area 9 is laminated veneer

Claims (1)

[Claims] (1) In the manufacturing method of laminated veneer, the process of pressing raw material veneers together with a flat plate and slicing them so that the straight grain appears is repeated an arbitrary number of times to create recycled veneers. The process of laminating recycled veneers with wood chips interposed, pressing them together, and slicing them so that the seams appear to prepare a non-porous area veneer.Meanwhile, a separately prepared veneer for the perforated area. A method for manufacturing a laminated veneer comprising the steps of: combining and laminating the veneer for the non-perforated portion, forming the veneer between mold plates having uneven curved surfaces, and slicing the veneer.