JPS6343203B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method for manufacturing artificial heathered decorative veneer,
The aim is to obtain an artificial heathered decorative veneer that has a straight-grain pattern that closely resembles the grain pattern of natural wood, in which the grain pattern is locally finely wavy and the width of the wood grain is partially changed. It is in.

A method for imparting partial changes to the grain pattern of artificial heathered decorative veneers has already been filed in Japanese Patent Application No. 55-38472 (Japanese Unexamined Patent Publication No. 56-133106).
In the present invention, the thin veneer used in the invention is also used to reproduce a straight-grain pattern, and in particular, in the present invention, the width of the straight-grain pattern of the artificial heathered decorative veneer is arbitrarily changed. This provides a method that allows free control of changes in the grain width and curvature of a straight-grained pattern.

That is, in the present invention, raw veneers are laminated and pressure-bonded between a pair of flat plates using an adhesive to form a flitch, and then the adhesive layer of the flitch is bonded to the adhesive layer so that the adhesive layer has a straight-grained pattern. In the method of manufacturing artificial heathered decorative veneer by peeling at an angle, the raw material veneer used above is a veneer with partially changed thickness, and by laminating and pressing them, Straight-grained veneers, which are laminated before and after a veneer whose thickness has been partially changed, are press-fitted into the thin recesses of the veneer, thereby changing the surface shape of each veneer. Since it relates to a method of manufacturing artificial heathered decorative veneer with partial changes in the pattern, it is possible to freely control changes in the width of the straight-grained pattern and the length of the curve.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

Fig. 1 shows an artificial heat-grained decorative veneer according to an embodiment of the present invention, Fig. 2 shows a veneer lamination frit for obtaining the decorative veneer of Fig. 1, and Fig. 3 shows the frit bonded together. This shows the state in which the material was prepared at an angle to the agent layer. FIG. 4 shows a state in which raw material veneers with partially varied thicknesses are laminated to produce the veneer laminated frittage of FIG. 2.

1 is a raw material veneer showing an example in which the thickness is partially changed and a recess 3 is formed, and as another example, as shown in Fig. 5, the thickness is partially changed in a direction inclined to the longitudinal direction of the veneer. A raw material veneer with varying thickness to form the recesses 3 may also be used. Please note that the veneer does not have a wood grain pattern.
The thickness obtained by stripping the almost invisible wood
With a thickness of about 0.5mm to 2.0mm, it can be finished in any color similar to the desired decorative veneer by applying treatments such as dyeing or bleaching.

Methods for changing the veneer include crushing a desired portion of the surface of the veneer using a press roll, flat press, etc., or cutting it with a knife. The shape of the width, depth, length, etc. of the thickness change, the angle of inclination to the longitudinal direction of the veneer, and the position on the surface of the veneer are adjusted depending on the straight-grain pattern of the desired artificial heathered decorative veneer.

The concavities 3 are formed on the raw material veneer 1 by applying pressure with an embossing roll or the like having irregularly shaped protrusions, and when these are used, the straight grain pattern also changes irregularly. However, if you want to give a straight grain pattern of decorative veneer with a grain width of about a as shown in Fig. 6 a partial bend with a length of about b and a maximum width of about c, please refer to Fig. 7 and its It is preferable to use a raw material veneer 1 provided with a recess 3 shown in FIG. 8, which is a cross-sectional view taken along line A-A'.

In other words, the grain width a and the grain bending width c of the decorative veneer correspond to the thickness f of the raw veneer and the depth o of the recess, and the grain bending length b corresponds to the recess made in the raw material veneer. The relationship b≈d/sin θ holds between the width d and the inclination angle θ. Therefore, considering the above relationship, raw material veneer 1
By determining the thickness (f), the width (d), depth (e), number and angle (θ) of the recesses 3, and determining the combination, you can freely bend the straight grain pattern in any part. I can do it.
The bending direction of the straight grain pattern reproduced on the surface of the decorative veneer is the peeling direction of the laminated fritsch from the adhesive layer and the lamination direction of the raw material veneer 1 with the recesses 3 (front and back).
Since it is determined by
The direction of inclination (right/left) is not particularly limited. Therefore, the inclination angle θ may be in the range of 0°<θ90° and 180°<θ<360°.

Note that the raw material veneer 1 may be used in combination not only with a veneer partially formed with the recesses 3 but also with a commonly used veneer without the recesses 3 formed therein.

2 is an adhesive layer made of commonly used urea resin or amino resin,
Room-temperature curing wood adhesives such as urethane resins can be used as they are, or they can be colored with dyes.

4 and 5 are a pair of flat templates.

Raw material veneer 1 laminated at once between templates 4 and 5;
The number of sheets is usually about 300 to 500, and the amount of adhesive 2 applied is ^about 50 to 150 g/m2. Pressing conditions are 10-50Kg/
The laminated fritches 6 are obtained by pressing at a pressure of cm ² for about 2 to 12 hours.

In the veneer laminated fritches 6 manufactured by the above method, other raw material veneers 1 are interposed between the raw material veneers 1.
The veneer 1 is press-fitted and deformed so as to fit into the recess 4, and is adhesively fixed in a finely wavy manner.

Therefore, after preparing the material at an angle to the adhesive layer 2 of the veneer lamination fritch 6 as shown in FIG. By stripping it to a thickness of about 0.2 to 1.5 mm, you can obtain the desired straight-grained artificial heathered decorative veneer. As described above, according to the present invention, by using a combination of veneers with different thicknesses on a portion of the surface of raw material veneers, it is possible to reproduce partial bends and changes in grain width in a straight-grained pattern. Therefore, compared to conventional artificial heathered decorative veneers, it is possible to freely obtain artificial heathered decorative veneers with a straight-grained pattern that closely resembles natural precious wood, and decorative veneers that are prized for their higher-grade straight-grained patterns.

In addition, when using a veneer with multiple recesses formed in a straight line parallel to the longitudinal direction of the raw material veneer, changes in the grain width and bending of the straight-grain pattern can be freely controlled. You can also do that.

Examples of the present invention will be described below.

Example 1 Agatis veneer 500 dyed tan with a thickness of 1.2 mm
Convex portions were formed on 300 of the sheets using an embossing roll having irregular cloud-shaped convex portions at a depth of 0.5 mm.

Next, for every two veneers without recesses, one veneer with recesses was placed, and 110 to 120 g/m ² of cold-curing adhesive colored dark yellow brown was applied to the veneers as shown in Figure 4. They were laminated between a pair of flat templates and pressed together as shown in the figure. 20
After pressing at Kg/ ^cm2 for 5 hours, the pressure is released to form a laminated frit (Fig. 2).
The material is prepared at an angle of 100 degrees (Fig. 3), and then the prepared surface is scraped to a thickness of 0.6 mm using a slicer to obtain an artificial heathered decorative veneer with an appearance that closely resembles the desired natural straight-grained zelkova wood. Ta.

Example 2 Recesses of 0.7 mm depth, 10 mm width, and 9 degree inclination angle as shown in FIG. 5 were formed on 500 Agatis veneers with a thickness of 1.0 mm at 5 cm intervals using an embossing roll.

Next, a cold-curing adhesive colored yellowish brown on the veneer plate with recesses was laminated between a pair of flat mold plates at 120 to 130 g/m ² as shown in FIG. 4 and pressed together. twenty five
After pressing at Kg/cm ² for 6 hours, the pressure was released to form a laminated fritchi, which was prepared at an angle of about 17 degrees to the adhesive layer of the fritchi, and then the prepared surface was sliced using a slicer to a thickness of 0.5 mm. By stripping the material, we obtained an artificial heathered decorative veneer with an appearance that closely resembles the desired natural straight-grained pine wood.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an artificial heathered decorative veneer with a straight grain pattern according to an embodiment of the present invention. Fig. 2 shows a veneer lamination frit for obtaining the decorative veneer shown in Fig. 1, and Fig. 3 shows the frit prepared at an angle.
FIG. 4 is a schematic perspective view showing a state in which the veneer laminated fritches are manufactured. FIG. 5 is a perspective view showing an embodiment of a veneer in which a plurality of linearly parallel recesses are formed for use in the present invention. FIG. 6, FIG. 7, and FIG. 8 are schematic diagrams showing the relationship between changes in the wood grain reproduced in the decorative veneer and the raw material veneer. 1...Single board with partially changed thickness, 2...
Adhesive layer, 3... recess, 4, 5... pair of complementary templates, 6... veneer lamination frits.

Claims (1)

[Scope of Claims] 1. Raw veneers are laminated with an adhesive, pressed and bonded between a pair of flat plates to form a frit, and then adhesive is applied so that the adhesive layer of the frit has a straight-grained pattern. In the method of manufacturing artificial straight-grain decorative veneers by peeling at an angle to the layers, the raw material veneers used above are veneers with partially changed thickness, and they are laminated and pressed. The veneers laminated before and after the veneer whose thickness has been partially changed are press-fitted into the thin recesses, thereby changing the surface shape of each veneer. A method for producing artificial heathered decorative veneer with partial changes in the straight-grained pattern. 2. In the straight-grained pattern described in claim 1, where the raw material veneer used is a veneer in which a plurality of recesses are formed linearly parallel to the longitudinal direction of the veneer. A method for producing artificial heathered decorative veneer with partial changes.