JPS6039007B2 - Decorative board manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a decorative board, and particularly to a method for manufacturing a decorative board having a deep carved pattern.

Decorative plates are used for furniture, buildings, wheels, aircraft, musical instruments, stationery,
Its uses are expanding in all sorts of fields, including leisure goods.

Among the above-mentioned uses, high-quality products are used that have deep carved patterns. However, decorative plates having deep carved patterns are produced by hand carving or by embossing, but the latter method is usually adopted in consideration of manufacturing costs.

When manufacturing a decorative board with a deep engraved pattern by embossing, the veneer is given a deep engraved pattern in advance, and the veneer is bonded to plywood, etc. to manufacture the decorative board. Ta.

As a method of imparting deep sculptural patterns to the vases and veneers,
As shown in FIG. 4, this is carried out by softening a veneer 3 inside a metal male mold 1 and pressing it with a metal male mold 13 having an engraved pattern 7 on the lower surface. Ta.

However, in such a method, when pressing 9 with the metal male mold 13, the lower surface 6 simultaneously presses 9 the entire surface of the veneer 3, so that the veneer 3 follows the shape of the deep carved pattern 7. The deformation limit of the veneer was exceeded, and the surface of the veneer 3, which had been given the deep sculptural pattern 7 after the pressing 9, broke at the corner 14 as if it had been torn off, resulting in a hangover. The problem was that there were many products that could not be put to practical use.

In order to prevent the corners 14 of the deep engraved pattern 7 given to the veneer 3 as described above from becoming rounded, a blade shape is attached to the corner 14 of the engraved pattern 7 on the lower surface 6 as shown in FIG. A number of methods are used for press-forming a veneer using a metal male mold 13 provided with a mold 15.

When the veneer is pressed by the mold 13, the veneer becomes the sixth
As shown in the figure, the applied engraved pattern 7 is cut all at once by the blade 15 in the vicinity of the corner 14, so that the cross section 16 becomes flat and the rounded state has been eliminated. This veneer 3
A decorative board as shown in FIG. 7 was manufactured by filling the upper surface with plastic 10, placing plywood 11 on it, and pressing it together. By such a method, it was possible to eliminate the drawback that many defective products were produced that could not be put to practical use, but on the other hand, when the corner part 14 of the engraved pattern 7 on the lower surface 6 of the metal male mold 13 was made into the blade shape 15. requires extremely advanced technology and effort in designing and manufacturing, and as shown in Fig. 7, the cut portion 17 is made of plastic that has a different color tone and appearance than the veneer 3. Because 10 sides appear, it is suitable for shadow finishing, but is completely unsuitable for solid wood finishing, making it difficult to use for high-end furniture, and its uses are limited.

The present invention overcomes both of the above drawbacks, namely, that the surface of the veneer provided with a deep carved pattern is in a chipped state, that the male mold is expensive, and that the uses of the finished decorative board are limited. The purpose of this is to eliminate all these shortcomings at once.

In the present invention, when giving a deep carved pattern to a veneer prior to manufacturing a decorative board, for example, as shown in FIG. A heat-resistant rubber male mold 8 having a carved pattern 7 on the lower surface 6 is prepared. Next, the veneer 3 is placed in the hollow part 2 of the female metal mold and pressed 9 with the male mold 8 to give the veneer 3 a carved pattern 7 as shown in FIG. After that, after removing the male mold 8, as shown in FIG.
The upper surface is filled with plastic 10, and then plywood 11 is placed and pressed 12 to harden the plastic 10. At the same time, the veneer 3, the hardened plastic 10, and the plywood 11
It is a combination of the two. In addition, in order to give the veneer a deep sculptural pattern in advance, in addition to the heat-resistant rubber male mold in which the flat plate-like protrusion 5 is integrally provided at the center of the upper surface 4 as described above, for example, a first mold is used. - As shown in Figure 2, a separate flat plate-shaped body 5 is attached to the center of the upper surface 4 of a heat-resistant rubber male mold 8, and a flat plate-shaped protrusion 5 is attached to the upper plate 27 of the press machine as shown in Figure 1-3. One in which a protrusion 5 with a cup-shaped cross section is integrally provided in the center of the upper surface 4 of the heat-resistant rubber male mold 8 as shown in FIGS. 1-5. As shown in the figure, a separate cross-sectional cup-shaped body 5 is attached to the center of the upper surface 4 of a heat-resistant rubber male mold 8, and as shown in Figure 116, the cross-sectional cup-shaped body 5 is attached to the upper plate of the press machine. 27 A protrusion integrally provided at the center of the lower surface 28, as shown in FIG.
As shown in Fig. 1-8, a heat-resistant rubber male mold 8 with a separate triangular cross-sectional body formed in the center of the upper surface 4, as shown in Fig. 1-9. A heat-resistant rubber male mold 8 has a triangular cross-section protrusion 5 integrally protruding from the entire top surface 4, and a separate triangular cross-section protrusion 5 is provided on the top surface 4 of the heat-resistant rubber male mold 8 as shown in FIGS. A shape with a war calendar etc. is used.

In implementing the present invention, the veneer 3 and the plastic 10
If adhesive is required between the metal female mold 1
A veneer 3 is placed inside the cavity 2 and a heat-resistant rubber male mold 8 is made.
When pressing 9, a double-sided adhesive film is placed on the veneer 3
The release sheet is layered in successive layers and softened, and when the release sheet is peeled off after pressing 9, the plastic 10 to be filled next
and the veneer 3 are sufficiently bonded.

It is preferable to use a thermosetting double-sided adhesive film to prevent the deep engraved pattern 7 imparted to the veneer 3 from "returning its shape".

In addition, if there is algae that leaks through the wood grain of the veneer 3 onto the product surface and contaminates the surface of the product when the plastic 10 is pressed at 9, it is advisable to apply a filler on the adhesive film from which the template sheet has been peeled off. A heat-resistant rubber male mold 8 which has a flat plate-shaped projection 5 at the center of the upper surface 4 and a carved pattern 7 at the lower surface 6 is made up of a veneer 3, a plastic 10, and a plywood 1.
1 and can be manufactured using a metal female mold 1 used to integrally combine them to form a decorative plate.

At this time, if base fabric is inserted into the interior and at locations close to the upper and lower surfaces, shrinkage during vulcanization can be suppressed. As the heat-resistant rubber, acrylonitrile butadiene copolymer rubber, butyl rubber, ethylene propylene copolymer rubber, chloro-sulfonated polyethylene rubber, etc. are used. Veneer 3 and plywood 1
1 and 1 are filled with plastic, foamed polyurethane, phenol resin mixed with wood powder, etc. are used. In the present invention, in forming the carved pattern 7 on the veneer 3,
Since a male rubber mold 8 having a flat plate-like protrusion 5 in the center of the upper surface 4 or being sent separately is used, when compressed in a press (not shown), the shape shown in FIG. As shown, first, the center of the veneer 3 is gradually pressed 18, so that the center part 19 of the veneer 3 is pushed down 201 degrees in the vertical direction, and the carved pattern 7 is formed on the part 19. At that time, the left and right peripheral parts 21 , 21 to the central part 19 from the projecting plate 3 as shown by the arrows 22, 2
2, and due to this action, the veneer 3
The lack of flexibility and elongation are offset, and the carved pattern 7 is formed on the veneer 3 without cracking.

When the formation of the engraved pattern 7 in the central part 19 is completed in this way, the above-mentioned effect gradually spreads and spreads to the surrounding area to form the engraved pattern, and eventually the entire surface is well-formed. A sculptural pattern is formed. The carved pattern 7 formed as described above has no rounded parts and is suitable for a solid finish. Incidentally, one of the conventionally practiced methods, ie, as shown in FIG.
The mechanism by which the engraved pattern 7 is formed when a decorative plate is manufactured by pressing 9 with a metal male mold 13 having a shape will be explained.

In this case, as shown in FIG.
3, the pressing forces 23, 23, . . . are uniform at all locations on the lower surface 6,
... is transmitted as it is to the entire surface of the veneer 3, and the veneer 3 is simultaneously pressed 26 with a uniform force against the upper surface 24 of the metal female mold 1 over the entire surface, so that all the pressing force applied to the veneer 3 is in the longitudinal direction 25. , 25 . . . , and the horizontal pulling force as shown by the arrows 22 and 22 in FIG. , 14, etc., the veneer 3 is torn off and hanged. The heat-resistant rubber male mold used in the present invention is a metal male mold,
In particular, as shown in FIG. 5, the metal male mold 13 that also has a cutting edge 15 at the corner 14 can be manufactured extremely easily without the need for advanced technology or much effort required when manufacturing the male mold 13. Therefore, the mold manufacturing cost becomes extremely low.

Example 1 As shown in Fig. 1-1, a metal female mold 1 having a sculptural pattern on the side with a maximum depth of 5, and a top surface 4 with a thickness of 5 ribs at the center of the female mold were manufactured. A male mold made of acrylonitrile butadiene copolymer rubber (hardness 70J
ISO) 8 was prepared.

Inside the hollow part 2 of the metal female mold, there is a 0.4-thick fence veneer (a thin plate cut from oak) and a thermosetting double-sided adhesive film (
Nitto Film N-5403) manufactured by Nitto Electric Industries.

Polyester template sheet (manufactured by Toray Industries, Lumirror Sheet)
As shown in FIG. 2, the laminate 3 in which the
Acrylonitrile butadiene copolymer male mold 8
Pressing was performed at a temperature of 120 oo, a pressing force of 7 to 10 k9/ground, and a time of 5 minutes. After pressing, the male mold 8 made of acrylonitrile butadiene copolymer rubber was removed, the polyester release sheet was peeled off, and a polyurethane filler (Mold Gart S manufactured by Union Paint Co., Ltd.) was applied, and the mold was left at room temperature for 10 minutes. Dry. After drying, as shown in Figure 3,
Polyurethane liquid (manufactured by Toho Chemical Industries/Icel 607)
A mixture of 100 parts by weight of liquid P and 105 parts by weight of liquid C)
10, and on top of that, a laminated plywood board 11 with a thickness of 5 ribs.
A decorative board was obtained by foaming and curing at a temperature of 40°C for 15 minutes.

Example 2 The metal female mold used in Example 1 and the acrylnitrile-butadiene copolymer rubber male mold 8 were prepared.

As shown in Figure 1-1, inside the hollow groove part 2 of the metal female mold, a 0.4-thick veneer (thin plate cut from a cherry tree), a thermosetting double-sided adhesive film (Nitto Film N- manufactured by Nitto Electric Industries), 5403).

Polyester release sheet (Toray, Lumirror Sheet)
As shown in Fig. 2, the laminated body 3 in which the
Pressing was performed using a male mold 8 made of acrylonitrile butadiene copolymer rubber at a temperature of 120° C., a pressing force of 7 to 10 k9/carp, and a time of 5 minutes. After pressing, the acrylonitrile butadiene copolymer rubber mold 8 was removed, and the polyester template sheet was peeled off. Next, as shown in FIG. A mixture consisting of 5 parts by weight of Nissan Vinyl E-800 manufactured by Nissan Vinyl E-800) was filled, and a laminated plywood board 11 with a thickness of 5 layers was spread on top of it.
It was cured at a temperature of 120° C. for 10 minutes to obtain a decorative board.

[Brief explanation of the drawing]

1-1 is a vertical cross-sectional view showing a main part of the manufacturing process of a decorative board of the present invention, FIG. 4 is a vertical cross-sectional view showing a main part of a conventional decorative board manufacturing process, and FIG. The figure is a longitudinal cross-sectional view of a metal male mold used to improve the method shown in Figure 4, and Figures 6 and 7 are manufacturing processes carried out using the metal male mold shown in Figure 5. FIG. 8 is a partial vertical cross-sectional view showing the main parts of the process and the decorative board obtained thereby; FIG. 8 is a partial vertical cross-sectional view showing the mechanism for forming the carved pattern of the decorative board of the present invention; FIG. FIG. 3 is a partial vertical cross-sectional view showing a mechanism for forming a carved pattern on a decorative plate of a pot. 1...metal female mold, 3... veneer, 5...
Plate body, 8...Rubber male mold, 10...Plastic, 11...Plywood, 13...Metal male mold, 14...Corner part, 15...Blade shape. Figure 1-1 Figure 1-2 Figure 1-3 Figure 1-4 Figure 1-5 Figure 1-6 Figure 1-7 Figure 1-8 Figure 1-9 Figure 1-10 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] 1 A projecting plate 3 is placed in the cavity 2 of a metal female mold 1, and a plate-like body 5 of an appropriate shape is placed in the center of the upper surface 4, or is placed as a separate body, and the lower surface 6 has a carved pattern. Press 9 with a heat-resistant rubber male mold 8 having a metal mold 8 to give a sculptural pattern 7 to the veneer 3, and after removing the heat-resistant rubber male mold 8, a metal female mold 1 is placed in the cavity 2. The upper surface of the veneer 3 placed thereon is filled with plastic 10, and then the base plate 11 is placed and pressed 12 to harden the plastic 10. At the same time, the veneer 3, the hardened plastic 10, and the base plate 11 are bonded together. A method for manufacturing a decorative board characterized by integrally joining together.