JPH0733005B2 - Method for manufacturing decorative veneer having curved pattern - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for producing a decorative veneer having a curved pattern by interposing veneers of the same tree species or different tree species.

2. Description of the Related Art Conventionally, as a method for manufacturing a decorative veneer having a curved pattern,
The one shown in Japanese Patent Publication No. 55-16041 is known. This publicly known method cuts out the material flitch into a circular or other predetermined pattern shape in the thickness direction, changes the direction of this cutout piece, or re-inserts it into a corresponding cutout hole at a different place and adheres the flitch. The desired decorative veneer is obtained by slicing to a predetermined thickness.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the decorative veneer obtained by the above method, a curved pattern is only expressed by the boundary line between the cutout hole of the flitch and the reinserted cutout piece. Although it is possible to give a curved pattern corresponding to the shape of the cut piece by cutting out a curved cut piece having a predetermined width from the material flitch, in practice, the cut processing is performed from the flitch. It is extremely difficult to form a curved hole corresponding to the cutout shape in the flitch as well as to obtain the curved cutout piece by the above, and it is almost impossible to apply in an industrial production scene. there were.

It is an object of the present invention to provide a method for manufacturing a decorative veneer capable of imparting a curved pattern having a predetermined width with an extremely simple operation, as compared with the above-mentioned conventional technique.

MEANS FOR SOLVING THE PROBLEM The present invention is for forming a pattern, which is prepared by separating a material flitch into two or more cut pieces by a predetermined curved cutting line and then providing a different material between the cut surfaces. A veneer having a curved pattern is obtained by sandwiching a veneer to bond and integrate it, and then slicing the veneer into a predetermined thickness.

More specifically, a step of cutting and separating a material flitch composed of a single flitch or an assembled flitch into a plurality of cut pieces along a cutting line having a predetermined curve or a predetermined curved portion in the thickness direction thereof. A step of sandwiching one or a plurality of pattern forming veneers in a flexurally deformed state between the cut surfaces of the cut pieces to form a curved pattern flitch by adhering them integrally to each other and then forming the curved pattern flitch on the surface. Including a step of slicing in a direction to obtain a veneer having a predetermined thickness, and performing each of the above steps under a high water content above the fiber saturation point, the production of a decorative veneer having a curved pattern The method is the gist.

Embodiments The present invention will be described below with reference to illustrated embodiments.

As the material flitch (1), a single flitch obtained by lumbering raw wood or a laminated flitch in which a plurality of materials such as a narrow board and a single board are combined and integrated. FIG. 1 exemplifies a case where this assembled flitch is used. When using the material flitch (1) either as a simple substance or as an assembly, the flitch having a high water content above the fiber saturation point is used.

In the first step, the material flitch (1) is first cut in the thickness direction thereof along a cutting line (2) forming a predetermined curve or a cutting line of a predetermined shape including a curved portion at least in part. , Separated into a plurality of cut pieces (1a) (1b) (1c). This cutting is generally performed using a thread saw. Further, the cutting line (2) is determined according to the curved pattern to be finally obtained, and in the embodiment shown in FIG. 2, the corners of the square material flitch (1) facing each other. Is formed in the shape of an arc having a radius of about 1/2 of the side length (l) (1 / 2l). Therefore, the material flitch (1) has one cut piece (1a) which is the main part of the material flitch,
It is cut and separated into two fan-shaped cut pieces (1b) and (1c). In addition to the above-described aspect, the cutting line may include a curved portion in part. For example, as in the modification shown in FIG. 8, the intermediate portion may be formed as a straight line portion (12a) and a cutting line (12) having curved portions (12b) (12b) at both ends thereof.

Next, as the second step, the cut pieces (1a) (1b) (1c)
Are sandwiched between the cut surfaces (2a) and (2a) to be bonded and integrated with each other to form a curved pattern flitch (11). The veneer (3) is manufactured separately from the wood of the same or different tree species as the material flitch (1), and if the pattern is desired to be emphasized, those having different appearances such as colors are used. Further, the veneer (3) is flexibly deformed along the curved cutting sides of the cut pieces (1a) (1b) (1c), and such deformation causes trouble such as cracking. In order to be carried out without any action, a wet one having a high water content above the fiber saturation point is used, and preferably a relatively thin and flexible tree species having a thickness of about 1 to 3 mm is used. . Further, it may be softened if necessary. Then, the pattern-forming single plate (3) is inserted and adhered by applying an adhesive of a kind capable of adhering to wet wood to each joint surface and then performing the single bonding as shown in FIG. The plate (3) is interposed between the cut surfaces of the cut pieces (1a) (1b) (1c). And as shown in FIG. 4, 1
The cutting piece (1a) is cut by the clamping jig (4) including one L-shaped fixing jig (4a) and the other three L-shaped movable jigs (4b) (4b) (4b). ) (1b) (1c) and the veneer (3) are pressed by applying pressure from four directions to complete the bonding, and therefore the veneer (3) is attached to the cut surface. It is fixed in a flexurally deformed state. As described above, one single plate (3) having a width of about 1 to 3 mm is used. If it is desired to form a linear pattern having a width wider than that, refer to FIG. As shown, a plurality of single plates (3) and (3) are laminated and interveningly bonded. For example, when it is desired to form a curved pattern having a width of 9 mm, it is possible to easily meet the above-mentioned demand by using three single plates having a thickness of 3 mm in a stacked manner. Further, in this case, a plurality of veneers of different colors are used, or only one of the three veneers (3) in the middle is used for the other two.
By using a different color from the sheet, it is possible to form a more interesting curved pattern.

Next, as a third step, the curved pattern flitch (11) obtained above is sliced in the plane direction, that is, in the direction parallel to the curved pattern to obtain a decorative veneer (A) having a predetermined thickness. To do.

In the third step, as a preparatory step, precision cutting / cutting processing is performed to finish both sides and four circumferential side surfaces of the curved pattern flitch (11) that has been bonded, and if necessary, this precision cutting / cutting processing is further performed. Finished curved pattern flitch (1
As shown in Fig. 5, a plurality of 1) are placed side by side on the wood (5) in a state where adhesive is applied to the joining surfaces of each other, and they are adhered while applying pressure from the vertical and horizontal directions. Form a large flitch (10) with wood. At this time, in order to prevent breakage when cutting the slicer, a thin wood or other sheet material may be adhered around the flitch. Then, the above wood (5) portion is held by the chuck of the slicer, and a large flitch (10) composed of an assembly of curved pattern flitch (11) is sliced in the plane direction, and a predetermined flicker as shown in FIG. 6 is obtained. To obtain a decorative veneer (A) of the size

The decorative veneer (A) thus obtained is adhered to a base material such as plywood, particle board, and hard board as it is, or in any combination, and is attached to an interior material such as a flooring material for a building or a wall material. , Or used for furniture, etc.

In each of the above steps in the present invention, namely, the cutting step of the material flitch (1), the step of inserting and bonding the pattern forming veneer, and the slicing step, the processed wood is in a wet state,
In particular, it is carried out under the condition of having a high water content above the fiber saturation point. Therefore, when the water content of the material drops below the fiber saturation point due to a time factor, each step should be performed by adjusting the water content above the fiber saturation point by dipping, water removal or the like. The reason for this is to prevent shape changes due to changes in water content of the material during processing, such as deformation such as cracking and twisting, maintain good workability, and facilitate accurate processing. Is. That is, wood having a water content above the fiber saturation point effectively retains a stable shape without any change in the physical or mechanical properties of the material even if the water content changes more than that. To use.

Therefore, the adhesive used for adhering the materials should be selected so that it can exhibit good adhesive force to wet wood having a water content of not less than the fiber saturation point. As such an adhesive, any adhesive such as an epoxy resin-based or urethane resin-based adhesive may be selected and used. Among them, an adhesive that reacts with moisture to exhibit a curing adhesive action, for example, a moisture-curing type one liquid The adhesive polyurethane resin adhesive has excellent adhesiveness, is easy to cut after curing, and has little discoloration of the glue line after adhesion, and therefore can be preferably used.

(Manufacturing Example) A square piece of oak wood having a water content above the fiber saturation point is laminated and integrated through a moisture-curable polyurethane adhesive to form 310 × 310 × 70 as shown in FIG.
A mm-sized square flitch was made and used as the material flitch (1).

Then, the material flitch (1) is cut along the arcuate cutting lines (2) and (2) shown in FIG. Separated into (1b) and (1c).

Next, between these cut pieces, a 3.0 mm-thick single veneer (3) made of brown sapele material between the cut surfaces, and moisture-curable polyurethane adhesive on each contact surface The pieces were brought together by using a jig (4) and pressure was applied from the surroundings to bond them.

Then the curved pattern flitch obtained by this (11)
After precision cutting and cutting of the upper and lower surfaces and the peripheral side surface into a flat shape, 6 pieces of the flitch are coated with an adhesive, and then lined up and down on the corresponding large wood (5) as shown in FIG. Also, cold pressure bonding was applied while applying pressure from the left and right directions to make a large flitch (10) with wood.

Then, under the condition that the whole of the large flitch (10) except the wood (5) is kept at a water content above the fiber saturation point, the wood (5) portion is grasped by a chuck of a slicer to remove the flitch. Slicing was performed in the plane direction, that is, parallel to the plane where the curved pattern exists, to obtain a decorative veneer (A) having a thickness of 0.3 mm. As shown in FIG. 2, the decorative veneer (A) has a 3 mm wide curved pattern (6) formed by adjacent pattern forming veneers (3) of the unit flitch portion continuous in a semi-arc shape in plan view. By arranging a plurality of the decorative veneers (A) while inverting them, a circular pattern as shown by a chain line in FIG. 6 could be obtained. Of course, the above-mentioned decorative veneer (A) can be obtained as a flat plate having no cracks, burrs, etc., so that it can be adhered to a substrate made of such plywood without any trouble. It was

EFFECTS OF THE INVENTION According to the present invention, as described above, it is possible to efficiently obtain a decorative veneer having a curved pattern with a constant width in any of the steps, and it is possible to efficiently obtain a decorative veneer. There is no difficulty in manufacturing and it is suitable for industrial production as compared with a case where a curved member is cut out from another material and then reinserted into the corresponding hole to form a curved pattern flitch. . In addition, since each step is carried out at a high water content above the fiber saturation point of the material, it is possible to obtain a decorative veneer with stable shape, size, etc. Since it is inserted and bonded between the cut pieces of the material flitch by using, the single plate can be easily flexibly deformed without any trouble even when a curved pattern having a relatively small curvature is formed. Further, by inserting a plurality of the single plates in a superposed manner, it is possible to form a curved pattern having an arbitrarily wide width, which is excellent in the flexibility of selecting the pattern mode.
And so on.

[Brief description of drawings]

The drawings show the embodiments of the present invention. FIG. 1 is a perspective view of a material flitch, FIG. 2 is a perspective view showing one mode of setting a cutting line, and FIG. 3 is a veneer for pattern formation after cutting. FIG. 4 is a plan view showing a state in which the veneers are inserted, FIG. 4 is a plan view showing a joined state of the same veneer, and FIG. 5 is a perspective view showing a state in which curved pattern flitches are lined up on a wood to form a large flitch. FIG. 7 is a perspective view of a decorative veneer of a product, FIG. 7 is a plan view of essential parts showing a modified example when a plurality of pattern-forming veneers are used in piles, and FIG. 8 is a modification of a cutting line formation mode. It is a top view which shows an example. (1) ... Material flitch, (2) (12) ... Cutting line, (1a)
(1b) (1c) ... cut pieces, (3) ... pattern forming veneer,
(6) ... curved pattern, (10) ... large flitch, (11) ... curved pattern flitch, (A) ... decorative veneer.

Claims (1)

[Claims] 1. A step of cutting and separating a material flitch composed of a single flitch or an assembled flitch into a plurality of cut pieces in a thickness direction thereof along a cutting line having a predetermined curve or including a predetermined curved portion, 1 between the cut surfaces of these cut pieces
Or a step of sandwiching a plurality of pattern forming veneers in a flexurally deformed state and adhering them to each other to form a curved pattern flitch, and then slicing the curved pattern flitch in the plane direction to obtain a single layer having a predetermined thickness. A method for producing a decorative veneer having a curved pattern, including the step of forming a board, and performing each of the above steps at a high water content above the fiber saturation point.