JPH02299802A - Manufacture of decorative material - Google Patents

Abstract

PURPOSE:To integrate a decorative sheet reliably with a core material even a part having unevenness, by a method wherein at the time of bend processing of the decorative sheet, at least one part is bent to a side opposite to a cutting and removing surface of a board and an adhesive agent is laid into a space generated between the decorative and a core materials with the said bending. CONSTITUTION:A groove 3 is formed by cutting and removing in a V-shaped state a part of a board 2, which is obtained by laminating a decorative sheet 1 to the surface, from the rear side (a) of the board 2 and a hot melt or foaming type adhesive agent having a filling effect is applied to the groove 3. Then a thin-walled part 5 is formed by cutting and removing the board 2 of a corresponding part with a difference 4 in level to provide the difference in level 4 and the same is bent so that the same surrounds the circumference of a core material 6 having a rectangular section. In this instance, a part of the decorative sheet 1 corresponding to a groove 8 of a part forming the difference 4 in level adjoining to the thin-walled part 5 is bent inward. A hot melt or foaming type adhesive agent is laid into also a space 9 formed on the inside of the bent part and contacting surfaces between the board 2 and core material 6 are stuck to each other with a vinyl acetate adhesive agent.

Description

DETAILED DESCRIPTION OF THE INVENTION Further Fields of Application The present invention relates to an improvement in a V-cut processing method, and in particular to a method for accurately manufacturing a decorative material having a stepped portion.

<Prior art> Conventionally, a method for producing this type of decorative material was disclosed in Japanese Patent Application Laid-Open No. 59-
As shown in Japanese Patent Application No. 114014, a method is known in which a decorative board is bonded by bonding a cut plastic sheet and a substrate so as to surround a core material having a polygonal cross section.

<Problems to be Solved by the Invention> However, in the above-mentioned conventional manufacturing method, a part of a substrate of a certain thickness on which a decorative sheet is laminated is simply cut away in a groove shape, and an adhesive is applied to the cut surface. It is simply bent gradually and glued to the core material, and since the core material usually has a short cross-section and a flat surface to be bonded to the decorative sheet, the finished product (frame material, skirting board, and other features) The material used in this method is limited to those with a flat surface, and cannot be applied to, for example, the production of products with uneven patterns for decorative purposes or high-quality windows.

<Means for Solving the Problems> The present invention was devised to solve the problems of the prior art described above, and involves cutting and removing a part of the substrate from the back side of the substrate on which a decorative sheet is laminated in the form of a groove. In the method for producing a decorative material in which adhesive is applied to the cut surface and then bent and bonded to the core material, at least one portion of the decorative sheet is bent on the opposite side of the cut surface of the substrate when the decorative sheet is folded; This method of manufacturing a decorative material is characterized by embedding an adhesive into the space between the core material and the core material.

Hereinafter, a detailed explanation will be given based on the drawings.

Figures 1 and 2 are for explaining the first method of the present invention, and show a substrate (2) on which a decorative sheet (1) is laminated.
A groove (3) is formed by cutting and removing a part of the substrate (2) in a 7-shape from the back side (a) of the substrate, and a hot melt or foam type adhesive with a filling effect is applied to the groove (3). Also, in order to provide a step (4), the corresponding part of the substrate (2
) is cut away to form a thin wall portion (5). This is the second
As shown in the figure, the core material (6) having a rectangular cross section is bent so as to surround it, and at this time, the portion corresponding to the groove (8) at the location where the step (4) is formed adjacent to the thin wall portion (5). The decorative sheet (1) is folded inward, and the space (9) formed inside this folded portion is also filled with hot melt or foam type adhesive with a filling effect, and then the substrate (2
) and the core material (6) are bonded together using vinyl acetate adhesive.

Figures 3 and 4 are for explaining the second method.
A groove (3) is formed by cutting and removing a part of the substrate (2) in a V-shape from the back side (a) of the substrate (2) on which the decorative sheet (1) is laminated. hot melt type,
Alternatively, apply a foam-type adhesive with a filling effect to the core material (6)', which has a cutout (7) corresponding to the location where the step (4) is to be provided, as shown in Figure 4. At this time, the decorative sheet (1) is folded inward at the part (b) corresponding to the notch (7) of the core material (6).Then, the space formed inside this reversely bent part is A hot melt or foam type adhesive with a filling effect is embedded in the core material (6) and the substrate (2).
The contact surfaces are glued together using vinyl acetate adhesive.

Effect> The present invention has the above-described structure, and unevenness (steps) is created between the portion of the decorative sheet that is bent to the side opposite to the cut and removed surface of the substrate (hereinafter referred to as the reverse bent portion) and the normal bent portion. Moreover, adhesive is embedded in the space between the reversely bent portion and the core material, so that the decorative sheet is reliably integrated with the core material even at the uneven portions.

<Example> A 2.7 mm thick plywood board with a 0.2 mm+ thick polyvinyl chloride decorative sheet laminated on the surface shown in FIG. 1.

After creating a decorative board as shown in Fig. 1 by creating V-shaped grooves and cutting using the method shown in Fig. 2, we applied an emulsion type vinyl acetate adhesive and a hot melt adhesive. Using hot melt type adhesive, embed the hot melt type adhesive in the space of the reverse bent part and the V-cut part created below the 7, and adhere it to the surface of the core material made of laminated wood to form the frame material for the interior door. Manufactured.

As a result, sufficient adhesion strength between the substrate and the core material was obtained even in the stepped portion formed by the thin-walled portion, and a frame material with excellent appearance was obtained, with raised portions formed.

<Effects of the Invention> Since the present invention has the above structure, a decorative material having unevenness (steps) on the surface can be easily obtained, and there is no adhesive in the space between the reversely bent portion and the core material. Since the agent is embedded, the decorative sheet and the core material can be reliably integrated even in areas with unevenness (steps).

Further, if the first method is used, a core material having a normal cross-sectional shape can be used as it is, and there is no need for special cutting, which further facilitates manufacturing.

[Brief explanation of drawings]

FIGS. 1 and 2 relate to a first example of the present invention, and FIG. 1 is a sectional view of a state in which a decorative sheet and a substrate are combined;
FIG. 2 is a sectional view showing a state in which the decorative material is adhered to the core material, FIGS. 3 and 4 are related to the second example of the present invention, and FIG.
The figure is a cross-sectional view of the decorative sheet and the substrate combined.
The figure is a cross-sectional view showing the state in which it is adhered to a decorative material. (1)... Decorative sheet (2)... Substrate (3)...
Groove (4)...Step (5)...Thin wall part (6)...Core material (7)...Notch
(8)... Groove (9)... Spatial patent application Representative Kazuo Suzuki, Toppan Printing Co., Ltd. Figure 2 Figure 4

Claims (1)

[Claims] In a method for producing a decorative material, the decorative sheet is manufactured by cutting a part of the substrate in a groove shape from the back side of the substrate laminated with the decorative sheet on the surface, applying an adhesive to the cut surface, and then bending and bonding the decorative sheet to the core material. A method for producing a decorative material, which comprises bending at least one portion of the substrate on the opposite side of the cut surface during the bending process, and embedding an adhesive in the space between the substrate and the core material created by the bending.