JPH07102535B2 - Manufacturing method of grooved decorative board - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a grooved decorative plate used for wall interior materials, ceiling materials, etc. of buildings.

Conventional technology and problems As a decorative plate that is mainly used for interior wall surfaces, a grooved decorative plate that has a three-dimensional effect and is improved in design by forming a number of parallel thin grooves on the surface. Is often used.

Such grooved decorative boards have hitherto been most commonly manufactured by cutting grooves on the surface by cutting. However, in this case, since there is a difficulty in finishing the inner surface of the groove after cutting, recently, various methods for producing a grooved decorative plate in which a surface decorative layer is continuously present on the inner surface of the groove have been proposed. ing.

One of the prior proposal techniques is, as seen in Japanese Utility Model Publication No. 59-1765, after the V groove is formed on the required substrate surface,
After sticking a wood veneer for makeup on the flat surface between each V groove with the side edges protruding in an overlapping manner on the groove, fold the above side edges of this veneer to both side surfaces of the V groove. It is to be attached. However, according to this method, a large number of individual decorative veneers that are independent of each other depending on the number of decorative grooves are required, and they must be individually arranged and adhered on the substrate in an accurate arrangement. In addition, each makeup veneer itself,
Since the width dimension requires a considerably strict accuracy, it is practically unsuitable for industrial production and has a fundamental problem that the cost becomes high.

Further, as another prior proposal technique, in Japanese Patent Laid-Open No. 61-29541, after a decorative sheet is attached to a substrate, the plate surface is fixed with an embossing roll or an embossing plate having an embossing ridge having a V-shaped cross section. A method has been proposed in which a narrow groove corresponding to the above-mentioned ridge is press-fitted by pressing. However,
In the case of this method, it is necessary not to break the decorative sheet in the portion where the cosmetic groove is formed, and since the embossing is performed on the premise of that, the depth of the furrow groove is 0.4 mm to at most 0.6 mm. There is another problem that it is impossible to provide a decorative plate having a sufficient three-dimensional effect because it cannot be made as shallow as possible.

The present invention, in the background of the prior art as described above, it is possible to form the groove depth, width sufficiently large, yet it is possible to keep the finished state of the surface of the groove portion beautiful, Moreover, it is an object of the present invention to provide a method for manufacturing a grooved decorative plate which has a simple manufacturing process and high productivity.

Means for Solving the Problems The present invention uses the technique of embossing to form grooves,
Contrary to the conventional way of thinking, conversely, by cutting the veneer wood veneer on the surface straight at the center of the groove and covering it only on both upper sides of the groove, a sufficiently deep groove is formed. By exposing the substrate base on both sides of the lower part of the groove and allowing the continuous wood grain pattern to be exposed from the wood veneer on the exposed parts, it is possible to eliminate the discomfort on the inner surface of the groove and create a groove with a beautiful appearance. The decorative board can be manufactured.

That is, according to the present invention, a wood veneer for makeup is attached to a plate-shaped substrate via a colored adhesive, and the surface of the obtained decorative plate has a V-shaped cross section corresponding to the planned groove position. By pressing with an embossing roll or embossing plate having grooved ridges,
On the surface of the decorative plate, both sides of the upper part of the groove are covered with the folded parts of the wood veneer, and a large number of decorative concave grooves exposing the substrate base are formed on the both sides of the lower part of the groove, and at the same time, the base material of the groove bottom part. A gist of a method for producing a decorative board with a groove is to form a conduit pattern by spreading a colored adhesive exuded from the conduit part of the wood veneer on the exposed surface.

The present invention will be described below with reference to the accompanying drawings.

First, as shown in FIG. 1, a wood veneer (2) for makeup is placed on the upper surface of a flat substrate (1) having a thickness of about 2.0 to 35 mm, preferably about 5 to 20 mm via a colored adhesive (3). ),
It is a flat decorative plate (A).

As the substrate (1), any material can be used as long as it can form a groove by embossing, and its material is not particularly limited. For example, plywood, medium quality fiberboard (MDF),
Particle board, lightweight particle board, hard board, insulation board, wafer board (WB), oriented strand board (OSB), laminated veneer (LVL), laminated veneer (LVB), laminated board, continuous mesh fiber In addition to wood material boards such as boards (Zefferwood) and inorganic impregnated wood boards, inorganic fiber boards such as rock wool boards, glass fiber boards and metal fiber boards can be used.

The wood veneer (2) has a thickness of 0.2 to 0.2 from natural wood in which the pipe parts such as oak, elm, sen, and zelkova appear relatively clearly.
A veneer of about 1.0 mm is used. However, as the wood veneer (2), a laminated veneer obtained by slicing a laminated material may be used in addition to an ordinary veneer, or a previously dyed veneer may be used. Furthermore, the wood veneer is
It is not always necessary to use one piece corresponding to the size of the substrate, and a plurality of single plates may be attached side by side on the substrate so as not to create a gap. In this case, it is preferable that the joint portion of the single plate is arranged in the central portion of the groove described later as much as possible.

The adhesive (3) for sticking the wood veneer (2) to the substrate (1) is colored, preferably darker than the substrate (1), and more preferably the decorative veneer (2). The one colored deeper than the ground color of shall be used. This makes it possible to color the conduit portion (6) of the wood veneer (2) by permeation of a coloring adhesive, to make it stand out, and to form a conduit pattern on the lower side surface of the groove as described later. To do. The type of the adhesive (3) is not particularly limited, and a common adhesive for bonding wood veneer such as urea resin, vinyl acetate resin, ethylene vinyl acetate resin, rubber, melamine resin, Urea / melamine co-condensation resin system, phenol resin system, water-based vinyl urethane resin system,
Epoxy resin-based, rubber-based, acrylic-based, or a combination thereof can be used.

The wood veneer (2) may be attached via a reinforcing interposer sheet if necessary. In other words, in order to prevent the wood veneer from being wrinkled, it may be attached to the substrate (1) via a reinforcing sheet made of paper, non-woven fabric, woven fabric, resin sheet, metal foil or the like.

Next, if necessary, the surface of the decorative board (A) is polished by a method such as sanding according to a conventional method, and then the wood veneer (2) is colored if necessary. An undercoat coating (10) is again applied using a transparent or colored transparent paint (see FIG. 3), and the surface is smoothed again by sanding or the like. The coloring and the undercoat coating may be performed after the embossing process for forming the decorative groove described later.

Next, at least the wood veneer (2) on the surface of the decorative plate (A) is provided with a cut (4) along the planned grooved position, or again without making a cut, and the decorative plate (A) is An embossing process is performed to form a decorative groove (9) on the surface of the.

When the cuts (4) are made in advance before the embossing process, the cuts are continuously formed by using a disc-shaped cutter (5) as shown in FIG. 2, for example. Alternatively, the wood veneer (2) may be continuously cut using a scoring knife. The cuts (4) referred to here include not only those formed as mere breaking lines but also those provided in the form of narrow grooves. That is, using a grooving cutter, for example, a concave groove of about 1 to 3 mm or V
It may be formed in the form of a groove. Cut (4)
The depth may be at least as large as the upper half of the thickness of the decorative veneer, but preferably it should be slightly shallower than the depth of the groove to be formed. It is desirable to form it to a depth that reaches the middle portion of the thickness of the substrate (1) within the range.

Then, as shown in FIG. 3, the surface of the decorative plate (A) is then provided with a grooved ridge (7) having a substantially V-shaped cross section at a position corresponding to the cut (4). (8) Or it presses using a die roll, and the makeup | decoration groove | channels (9) corresponding to the shape of many ridges (7) are press-fitted in parallel at the surface part of the decorative plate (A).

This embossing is preferably carried out under heating in order to improve the shaping stability, and the temperature and embossing time depend on the type and specific gravity of the substrate (1) and the wood veneer (2). Set appropriately according to the type, but generally temperature 70 ~ 300
The temperature can be set within the range of about 1 to 10 minutes. The above heating may be performed by heating either the decorative plate (A) or the die, or by heating both of them.

The wood veneer (2) is cut (4) by the embossing process described above.
Is widened, and both sides of the cut (4) are concave grooves (9).
Is pressed into the groove (2a) to cover the upper side surfaces of the groove, and the lower side surfaces of the base material (1) are exposed, while the base material is formed on both sides of the concave groove (9). The structure of 1) is consolidated and the side surface of the groove becomes smooth.

In addition, the crushing of the folding part (2a) of the wood veneer (2) by the embossing process exudes the colored adhesive that had penetrated into the conduit part, and this is extruded, and this exposes the base material exposed surface (9) at the groove bottom.
A) is spread onto the exposed surface to form a continuous conduit pattern (6a) of the same color continuous from the conduit portion (6) of the wood veneer (2) on the exposed surface. This conduit pattern (6a) gives an appearance as if the veneered wood veneer (2) on the surface is continuous in the groove (9) up to the bottom of the groove, making the grooved veneer even more luxurious. Give a feeling.

By the way, the exudation of the colored adhesive from the conduit portion (6) can be exuded by the pressing during the embossing process even at room temperature depending on the type of the adhesive. By performing the embossing process, it is possible to enhance the fluidity of the colored adhesive and allow it to exude more favorably. In addition, the reason why the conduit pattern (6a) can be formed on the base material exposed surface (9a) of the concave groove (9) by the exudation of the colored adhesive from the conduit portion (6) is as follows. That is,
In a general veneer wood veneer (2) made of hardwood, the conduits (6) are concentrated from the natural wood to the wood grain formation part. In other words, the wood grain is formed by the concentrated conduit portions (6), and the conduit portions are not evenly distributed over the whole. Therefore, the colored adhesive is partially exuded from the wood grain portion where the conduit portion (6) is densely distributed in a concentrated manner,
The adhesive is partially spread only on the corresponding part, and as a result, the exposed base material surface (9a) in the groove (9) is continued from the conduit portion (6) of the decorative wood veneer (2). In an aspect, a conduit pattern (6a) will be formed.

The grooved ridge (7) is basically required to have a substantially V-shape, and as shown in FIG. 6, both side surfaces may have a straight cross-sectional triangular shape, but it is preferable. As shown in FIG. 4, the outer shape of the concave groove (9) is one in which the tip has an acute angle and the both sides are curved inward in a substantially V-shaped section or a modified V-shaped section. It is possible to obtain a good product.

The width (W) and the depth (D) of the groove (9) are not particularly limited, but the width (W) is 3.0 mm or more and the depth is sufficient to express a sufficient three-dimensional effect. (D) should be 2.5 mm or more. Particularly preferably, the width (W) should be 5 to 10 mm and the depth (D) should be 3 to 5 mm.
Width (W) 7.0 mm, depth (D) 3.5 in a decorative board (A) in which a wood veneer (2) of 0.2 mm is attached to a MDF board (1) of mm
When the concave grooves (9) shown in FIG. 5 having a size of 2.0 mm are formed at intervals of 2.0 cm, the decorative plate (A) is also provided with some flexibility while giving an excellent three-dimensional effect to the surface. It is possible to obtain a product that can be applied to a curved surface. In addition, the groove (9)
The interval, that is, the pitch, is arbitrary and is not limited at all.

Further, as described above, the embossing of the concave groove (9) may be performed without making the cut (4). In this case, as shown in FIG. 7, as the embossing plate (8) or the grooved ridges (7) of the embossing roll, one having a sharp cutting blade (7a) at its tip is used. Then, by pressing the decorative plate (A) with a required pressure from the surface side with this embossing plate (8) or embossing roll, the decorative sheet (2) and subsequently the substrate (1) are held with the cutting blade (7a). While making the cut, a concave groove (9) having a corresponding shape is press-fitted and formed on the surface of the decorative plate with the ridge (7).

The shape of the recessed groove (9) formed by the embossing process is similar to that of the grooved ridge (7) as shown in FIG. As shown in FIG. 9 (a), the groove bottom (9a) has a slightly rounded shape, or as shown in FIG. 9 (b), it has a slight bent portion (9b) on the lower side surface of the groove. The bottom (9a) of the groove may be formed to have a slightly rounded shape. Of course, when embossing with the ridge (7) as shown in FIG.
In addition to the case where it is formed in a V-shaped cross section with sharp corners as shown in Fig. 9 (c), which reproduces its shape, the groove bottom (9a) and the groove upper edge (9c) ) Is often formed in a rounded form.

After forming the decorative groove (9) as described above, if necessary, a colorant is applied to the groove (9) for coloring,
Alternatively, without the coloring, the groove is coated with a transparent or colored transparent paint (11) as shown in FIG. This groove coating (11) strengthens the substrate (1) in the recessed groove (9) portion by allowing the coating material to permeate well from the exposed portion of the substrate base on both side surfaces of the groove lower portion and harden, while absorbing moisture, water, etc. It is effective in preventing the elastic recovery of the concave groove (9) due to, and also helps to improve the finished state of the inner surface of the concave groove (9).

Finally, a top coating (12) is applied to the entire surface of the decorative plate (A) in which the concave groove (9) is formed and dried to obtain a product.

The undercoating (10), groove coating (11), and topcoating (12) above are general ones such as aminoalkyd, polyurethane, lacquer, polyester, etc. Paints, electron beam curable paints, etc. can be used.

In the product manufactured as described above, when there is a possibility that warpage may occur, notches or fine grooves may be appropriately formed at predetermined intervals on the back surface side of the substrate (1) according to a conventional method. If there is a concern that warpage may occur due to water absorption, moisture absorption, drying, etc. from the back side, attach resin impregnated paper, vulcanized fiber paper, synthetic resin film, synthetic resin independent foam sheet, etc. to the back side. Or waterproofing such as applying the same paint as the above-mentioned top coating on the back side,
It is preferable to perform a moisture-proof treatment.

By the way, the coloring of the concave groove (9) is performed as necessary as described above. However, when coloring, by coloring the groove in a color tone different from that of the wood veneer (2). The concave groove can be emphasized, and by coloring with the same color tone as the wood veneer (2), a natural feeling can be given to the whole, and either one may be appropriately selected.

The wood veneer (2) may be colored or undercoated before or after the grooved embossing step, or both. However, coloring is performed before the embossing process to keep the lower side surface of the concave groove (9) in the base material color, prevent the lower part of the groove from becoming dark, and give the whole a natural appearance. It is preferable in a certain sense. However, on the contrary, when coloring after embossing, since the colorant can be absorbed in the exposed parts of the base material on both sides of the lower part of the groove, the lower part of the groove becomes darker than the decorative surface, and it is thin and sharp. It is possible to create a solid shadow and enhance the three-dimensional effect. In addition, the undercoat is especially notched (4)
In the case of embossing without putting, the wood veneer is strengthened by hardening the paint by performing it before the embossing.
This is preferable in that the decorative wood veneer can be prevented from tearing or cracking at the upper edge of the groove or the like during the embossing process, and the concave groove (9) can be surely formed in a desired and accurate manner.

FIG. 10 shows, as a preferred example of the grooved decorative plate manufactured according to the present invention, a concave groove (9) having a substantially V-shaped cross section with its tip having an acute angle and both side surfaces gently curved inward. The external appearance in the case of being formed straight in the longitudinal direction of the plate in parallel with the narrow gap. The arrangement form of the recessed grooves (9) is not limited to the above, and it may be formed in any deformed arrangement form such as an oblique shape as shown in FIG. 11 (a) or a wave shape as shown in FIG. 11 (b). You can also

Examples Specific examples of the present invention will be described below.

Example 1 A wood veneer composed of a veneer made of oak wood having a thickness of 0.3 mm as a decorative material on one surface using a 5.0 mm-thick medium density fiber board (MDF) as a plate-like substrate (1) Was used. Then, a wood veneer on the above MDF substrate was mixed with a dark brown-colored vinyl acetate resin and a urea / melamine co-condensation resin mixed coloring adhesive (3) (application amount: 120 g / m ² ) in a conventional method. After sticking with, by the second part on the surface of the obtained decorative plate (A)
A large number of cuts (4) were formed in parallel with a depth of 2 mm and a pitch of 30 mm using a disc-shaped cutter as shown in the figure.

Then, the embossing board (8) provided with the grooved ridges (7) as shown in FIG. 4 was used to apply embossing to the surface of the decorative plate, and at the cuts (4), respectively. Depth 3.
A decorative groove (9) having a V-shaped cross section with a tip of 5 mm and an acute angle on both sides and gently curved inner surfaces on both sides was press-formed.
In this embossing process, the embossing plate (8) is heated to 120 ° C,
The embossing time was set to 5 minutes.

Then, after sanding the surface of the decorative board (A) and coloring it with a light brown colorant, a transparent amino alkyd undercoat paint is applied at about 35 g / m ² , dried and then sanded again, Then, the polishing powder generated by sanding in the groove was removed.

Then, in the groove portion, after applying a groove coating using an amino alkyd-based transparent paint, on the entire surface of the decorative plate,
Amino alkyd transparent topcoat was applied to about 60 g / m ² and dried to obtain the desired grooved decorative board.

This grooved decorative plate has a form as shown in FIG.
Both sides of the upper part of the decorative groove (9) are covered with a wood veneer (2), the base material of the substrate (1) is exposed on both sides of the lower part of the groove, and the exposed part of the wood veneer (2) is exposed. The conduit pattern (3) by spreading the dark brown adhesive (3) exuding from the conduit (3)
a) is formed in a continuous state from the folded part (2a) of the wood veneer (2), and at first glance, it has a natural engraved appearance as if the wood veneer is continuous up to the vicinity of the groove bottom.ゝ The whole thing was beautiful because of the presence of the groove.

Example 2 As a substrate, a lightweight particle board having a thickness of 10 mm was used, and a water-based vinyl urethane-based coloring adhesive colored dark brown was applied to the surface of the board at about 35 g / m ² ,
A 0.3 mm thick wood veneer consisting of a veneer veneer was laminated and stuck on top of this.

Then, sanding the surface of the obtained decorative board,
After coloring it to a light brown color, a transparent polyurethane undercoat paint was applied to about 50 g / m ² .

Then, while using the embossing board (8) having the grooved ridges (7) as shown in FIG. 7 with the tip as the cutting blade (7a), while cutting the decorative plate (A) from the surface side. The surface of the decorative board (A) was heated and embossed on the surface of the above-mentioned Example 1.
A makeup concave groove (9) having substantially the same shape as the above was press-formed. In this case, the embossing process was performed by setting the temperature of the embossing plate to 130 ° C. and the embossing time to 3 minutes.

Then, in the same manner as in Example 1, the groove coating of the concave groove and the top coating of the entire surface were sequentially applied to obtain a desired grooved decorative plate.

This decorative sheet with grooves also has a conduit pattern made of a colored adhesive on the substrate exposed surfaces on both lower side surfaces of the concave groove as in the case of Example 1, and the concave groove is formed by cutting a thick muku plate in appearance. It was a beautiful thing that looked as if it had been formed.

EFFECTS OF THE INVENTION According to the present invention, since the wood veneer for cosmetics on the surface is folded into the upper side surfaces of the groove to form the groove having the V-shaped cross-section, the groove is sufficiently formed. It is possible to form a deep and wide one, and it is possible to obtain a grooved decorative plate in which the presence of concave grooves is sufficiently emphasized on the plate surface. Moreover, the concave groove is formed in a corresponding V-shaped cross section by using an embossing plate or an embossing roll having a grooved convex portion having a substantially V-shaped cross section. Occasionally, the wood veneer does not break or crack, and both upper sides of the groove are covered with clean, continuous parts from the surface wood veneer. Therefore, the thin wood veneer does not appear to have a thin appearance in the groove.
Moreover, by using a colored adhesive to bond the wood veneer to the substrate, this penetrates into the conduit part of the wood veneer to emphasize the conduit pattern, while the embossing process is applied to both sides of the lower part of the groove. Also, a spreadered conduit pattern of colored adhesive is formed. Therefore, it is possible to give the appearance that the wood veneer on the surface is continuous up to the vicinity of the groove bottom of the decorative groove, and by extension, whether a thick veneer or a solid veneer is used. Thus, it is possible to obtain a high-quality grooved decorative plate having the appearance as described above.

In addition, since the groove is formed by embossing and the surrounding tissue is compacted, the surface condition of the groove is smooth and clean, and no special finishing such as special polishing of the groove is required. Further, when the groove coating is applied, since the coating material absorbs well in the base material exposed portion under the groove, the peripheral portion of the recess groove is strengthened by the curing of the coating material, and the elastic restoration of the recess groove is prevented. Therefore, even though the groove is formed by embossing, it can be excellent in shape retention. Moreover, since a wood veneer for makeup is adhered to the substrate from the beginning, it is possible to manufacture the embossing process that gives the concave groove as an essential main step, so any of the steps is simple and the production efficiency is good, etc. Exerts the excellent effect of.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a decorative board in which a decorative wood veneer is attached to a substrate, FIG. 2 is a cross-sectional view showing a cut processing state in which a cut is made in the decorative board, and FIG. Sectional view, 4th
FIG. 5 is an enlarged cross-sectional view showing a shape of the groove, FIG. 5 is a perspective view showing a state of a conduit pattern spread and formed on the lower side surface of the groove by embossing, and FIG. Fig. 7 is a sectional view showing a modified example of the shape of the grooved ridges of Fig. 7, Fig. 7 is a sectional view showing still another modified example of the grooved ridges of the embossing plate, and Fig. 8 is a grooved groove Further, an enlarged cross-sectional view of a state where the entire surface of the decorative plate is overcoated, FIGS. 9 (a), (b) and (c) are cross-sectional views showing various modifications of the shape of the concave groove, and FIG. 10 is a view of the product. Perspective view showing an example of a grooved decorative plate, FIG. 11 (a) (b)
FIG. 8 is a schematic plan view of a grooved decorative plate showing a modified example of the shape of a groove. (A) ... Decorative plate, (1) ... Substrate, (2) ... Decorative sheet, (4) ... Cut, (5) ... Cutter, (6) ...
… Conduit section, (6a) …… Conduit pattern, (7) …… Grooving ridge, (8) …… Embossing board, (9) …… Makeup groove, (10)
…… Undercoating, (11) …… Groove coating, (12) …… Overcoating.

Claims (1)

[Claims] 1. A wood veneer for makeup is adhered to a plate-like substrate via a colored adhesive, and the surface of the obtained decorative plate has a groove having a substantially V-shaped cross section corresponding to the planned groove position. By pressing with an embossing roll or embossing plate having a ridge, the upper surface of the groove is covered with the folded part of the wood veneer on the surface of the decorative plate, and the base material of the substrate is exposed on both lower surfaces. At the same time as forming a large number of decorative grooves, a groove pattern is formed on the exposed surface of the base material at the bottom of the groove by spreading a colored adhesive exuded from the conduit portion of the wood veneer. A method for manufacturing a decorative board.