JPS59225902A - Manufacture of decorative veneer with annual ring pattern - 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] The present invention relates to a method for manufacturing a decorative veneer having a tree ring pattern,
More specifically, by drilling a cylindrical hole on the surface of a base material made of laminated laminae, placing a log in this hole to form a flitch material, and then cutting this flitch material into slices, The present invention relates to a method for manufacturing decorative veneer with a pattern of annual rings of logs scattered on its surface.

Conventionally, decorative plywood, which is made by pasting decorative veneer to a plywood substrate, has mainly been monotonous with the natural wood grain pattern of high-quality precious wood expressed as a surface pattern, but it has also been made with decorative devices such as mosaic patterns on the surface. There are only a few examples of those that utilize the tree ring pattern on the wood.

In addition, the annual ring pattern of the wood grain is often uniformly arranged in multiple rows and rows, and the heavyness of this type of decorative plywood is emphasized more than necessary, and the areas where it can be used as decorative plywood are limited. . Furthermore, when producing a decorative veneer with a wood-end growth ring pattern, it is possible to saw the wood end to produce a veneer of a constant thickness; however, according to this method, the veneer is pasted under pressure, etc. There were problems in the process, such as cracks and splits, and the cost of veneer materials was high. On the other hand, the thinner the cutting thickness is, the more problems arise, such as splitting due to the brittleness of the butt end, which has a low shear modulus.

Therefore, in the manufacturing method of the present invention, a hole is formed in the butting end surfaces of a base material made of assembled lamina, a log material is placed in this hole to form a flitch material, and this flitch material is cut to form a decorative structure. The purpose of this project is to manufacture veneers, and we aim to provide a method for manufacturing decorative veneers with excellent quality, such as less splitting during cutting, a high production yield, and no warping or peeling as decorative plywood. It is something to do.

The manufacturing method of the present invention will be explained below based on the drawings.

Figure 1 is an overall perspective view of the base materials 1, 2.3, etc., which are made of laminate made from raw wood such as elm or ash to a predetermined size and thickness. 11.12.13...

21.22.23..., 31.32.33... are randomly composed, an adhesive such as epoxy resin or urethane resin is applied, and lamina 11, 12.13..., 21 are formed.
, 22, 23..., 31, 32, 33... are arranged in the grain direction with respect to the cutting direction, and are assembled by pressing.

The lamina are joined to each other by ordinary pad joints or finger joints, but here, the base materials 1, 2.
3 is not bonded, that is, the adhesive is not yet applied to the side end surfaces 1p and 2p, 2p and 3p of the base materials 1, 2.3.

FIGS. 2(a) to 2(d) are process diagrams illustrating a method of manufacturing a flitch material by drilling holes in the side end surfaces of base materials 1 and 2 and placing logs in the holes.

FIG. 2(a) shows a state in which the side end surfaces ip and 2p of the base materials 1 and 2 are butted together and pressed together using a vise (not shown) or the like; side end surface tp
As mentioned above, no adhesive is applied between and 2p.

Figure 2(b) shows base materials 1 and 2 pressed together with a vise etc.
2 shows a state in which a hole 40 is drilled.

In other words, both base materials 1 and 2 are clamped and temporarily fixed in a vise.
A hole 40 is drilled on the butting side end surfaces 1p and 2p using a drill or the like so that the center of the hole 40 is centered. Then, the center of this hole 40 will be located within the plane of the abutting side end surfaces 1p-2p of the base materials 1 and 2.

FIG. 2(c) shows the base materials 1 and 2 in a state in which the holes 40 have been bored and then released from the clamping force using a vice or the like. When the pressure of the heis etc. is released, since no adhesive is applied to the side end surfaces tP and 2p of the base materials 1 and 2, they are not fixed and the original base materials 1 and 2 remain.
divided into At this time, the hole 40 is also divided into semicircular shapes,
A semicircular hole 41 is formed on the side end surface IP of the base material 1, and a semicircular hole 42 is formed on the side end surface 2p of the base material 2, respectively.

FIG. 2(d) shows the semicircular holes 41°42 of the base materials 1 and 2.
The process of arranging logs 50 to form a flitch material will be explained.

That is, a log material 50 having approximately the same diameter as the hole 40 is inserted into the semicircular hole 41.
and 42 to form the flitch material,
At this time, an adhesive such as epoxy or urethane resin is applied to the outer periphery of the log material 50, the side end surface 1p of the base material 1, and the side end surface 2p of the base material 2, and the log material 50 is sandwiched between the base materials 1 and 2p. 2 and clamp with a vise etc. As a result, a flitch material 60 having a tree ring pattern of log material arranged on the surface as shown in FIG. 3 is produced.

This flitch material 60 is fixed and cut with a slicer or the like to produce a decorative veneer having a thin plate-like annual ring pattern.

If necessary, the outer periphery of the flitch material 60 is pasted with a stick, or the surface of the flitch material 60 is cut with a planer and a super finishing plane. In addition, in the cutting process, either the slicer can be moved or the flitch material itself can be moved, but the cutting edge of the slicer should not be at right angles to the feed direction but at a bias angle of about 5° to 30°. It is convenient if you leave it there.

If a bark-colored thin board is wrapped around the outer circumference 51 of the log material 50, the above-mentioned bark-colored outline will be attached to the outer periphery of the annual ring pattern, and the decorative veneer will be different from the one with only the annual ring pattern. The pattern of separation will be expressed.

Furthermore, as shown in FIG. 4(a), the timber is sawn so that the center line has an inclination angle α of 0° to 25° with respect to the line 73 connecting the upper and lower horizontal cores 71 and 72 of the felled timber 70. Log material 50
Create a line 7 that connects the horizontal cores 71 and 72 of this log material 50.
If the flitch material 6 is configured such that the flitch material 3 is located within the side end surfaces of the base materials 1 and 2, the line 73 connecting the horizontal cores of the log material 50 will be located on the surface of the flitch material as shown in FIG. 4(b). It has an inclination angle of Oo to 25° with respect to the vertical axis V of .

Then, by slicing this flitch material into thin plates from the direction of arrow C, it is possible to obtain a good decorative veneer with less cutting resistance at the annual ring portion.

In addition, if the laminar and log material constituting the base material have a moisture content higher than the fiber saturation point, the length will not be easy to cut, and the difference in drying shrinkage between the two will be small.
This is a decorative veneer that can be directly attached to a base plate without the need for trimming or splicing.

Although the above manufacturing method has been explained using a flitch material composed of base materials 1 and 2, the present invention is not limited to this, and a flitch material may be composed of a plurality of base materials 1, 2, 3, etc. In this case, a desired number of holes are drilled on each side end surface, and logs are placed and fixed therein to provide a decorative veneer with a randomly arranged annual ring pattern.

As explained above, in the method of manufacturing a decorative veneer with a tree ring pattern according to the present invention, a hole is formed in the butting side end surfaces of two base materials, and a log is placed in the hole and bonded together, and the base materials are also bonded to each other. Since the flitch material is formed by sticking together and the flitch material is then cut, the method of forming the flitch material is to glue the base materials together in advance and then press-fit the logs into holes drilled there. Compared to this, the work of constructing the flitch material is extremely easy, and since the semicircular holes in both base materials sandwich and fix the log materials, there is no gap between the base material and the log material, making it clear. It is possible to produce a decorative veneer with a poetic feel that has interspersed tree ring patterns.

[Brief Description of the Drawings] Figure 1 is a perspective view of a base material assembled by bonding laminars, and Figures 2 (7a) to (d) show the manufacturing process of the flitch material according to the present invention. An explanatory diagram, FIG. 3 is a perspective view of a flitch material according to the present invention, and FIG.
Figure 4 (a) is an explanatory diagram of sawing logs from felled wood at an angle of inclination, and Figure 4 (b) is an illustration of logs arranged at an angle of inclination with respect to the vertical axis of the surface of the flitch material. FIG. 1.2.3... Base material, IP+2P+3P... Side end surface. 40... Hole, 50... Log wood, 60... Furinchi wood. Applicant: Sanyo Kokusaku Pulp Co., Ltd. Agent: Kuninori Funabashi, patent attorney

Claims (1)

[Claims] 1. Hold the side end faces of the base material assembled with lamina against each other, make a hole centering on the side end faces, place a log in the hole, and then press the base material. A method for manufacturing a decorative veneer having an annual ring pattern, which comprises: forming a flitch material by fixing lumber and a log; and slicing the surface of the flitch material.゛2. After drilling the holes, the base materials are released from each other, and an adhesive is applied to the side end surfaces of the base materials and the outer periphery of the log material to fix the base materials and the log material to each other to form a flitch material. A method for manufacturing a decorative veneer having an annual ring pattern as set forth in claim 1. 3. The method for manufacturing a decorative veneer with a tree ring pattern as set forth in claim 1, wherein a bark-colored thin board is wound around the outer periphery of the log and placed in the hole. 4. The tree ring pattern according to claim 1 or 2 is characterized in that the log is placed in the hole with a line connecting the upper and lower tree cores located within the side end surface of the base material. A method for manufacturing a decorative veneer. 5. The log material is sawn so that the line connecting the upper and lower tree cores has an inclination angle of 0° to 25° with respect to the vertical axis of the surface of the flitch material, or 2. A method for producing a decorative veneer having an annual ring pattern according to item 2. 6. The method for manufacturing a decorative veneer with a tree-ring pattern according to claim 1, wherein the lamina and log material constituting the base material have a moisture content higher than the fiber saturation point.