JP2002001709A - Method for manufacturing facing material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing facing material difficult to be deformed by preventing a warpage due to machining. SOLUTION: At least a front face part 2a and a rear face part 2b comprise intermediate density fiber boards 3 and 4, and a pattern forming groove 5 is machined by a specific cutting depth D on the middle density fiber board 3 on the front face part 2a side. Besides, the intermediate density fiber board 4 on the rear face part 2b side is machined by a cutting depth D' of almost the same degree as that of the density fiber board 3 on the front face part 2a side to obtain a core material 2. Thereafter, a facing sheet 6 is stuck to an outer face of the core material 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a decorative material, and more particularly to a technique for producing a decorative material without warpage.

[0002]

2. Description of the Related Art As shown in FIG. 4, a medium density fiberboard (MD) having the same thickness on at least a front surface portion 2a and a back surface portion 2b is used for manufacturing a decorative material used for a door frame material or the like.
F) The work material 1 is obtained by laminating 3, 4
The pattern forming groove 5 is cut at a predetermined cutting depth D in the medium-density fiberboard 3 on the surface portion 2a side of the surface portion 2a to obtain a core material 2 whose surface is decorated with an uneven pattern. A decorative sheet (not shown) was stuck on the outer surface of the.

[0003]

However, as shown in FIG. 3, the medium-density fiberboard 3 has a high-density layer 10 on each of its outer surfaces and a low-density layer 11 at the center, as shown in FIG. Due to the cutting of the plate 3, a bias occurs in the fiber density between the medium-density fiber plate 3 on the surface portion 2 a side of the core 2 and the medium-density fiber plate 4 on the back surface 2 b, and the surface portion 2 a of the core 2 And back 2
There is a problem that the stress balance is lost between the b side and the warp is likely to occur, and when this product is used, for example, as a door frame material, the door is likely to be deformed.

An object of the present invention is to provide a method of manufacturing a decorative material which is less likely to be deformed while preventing warpage due to cutting of a medium density fiberboard. Another object of the present invention is to provide a method of manufacturing a decorative material capable of reinforcing a cut core material and improving the adhesive strength of a decorative sheet.

[0005]

According to the present invention, at least a front surface portion 2a and a back surface portion 2 are provided.
b are formed of medium-density fiberboards 3 and 4, the pattern forming grooves 5 are cut into the medium-density fiberboard 3 at the predetermined cutting depth D on the surface part 2 a side, and the medium-density fiberboards 3 and 4 are formed on the back surface part 2 b side. The fiberboard 4 is cut at a cutting depth D 'substantially equal to that of the medium-density fiberboard 3 on the surface portion 2a side to obtain the core material 2.
The decorative sheet 6 is stuck on the surface portion 2a side where the pattern forming grooves 5 are formed and the medium density fiber plate 3 on the back surface portion 2b side where the pattern forming grooves 5 are formed. The plate 4 is cut with the same cutting depths D and D ′, whereby the stress balance is maintained between the front surface 2a and the back surface 2b of the core material 2 and the decorative material 7 The whole can be hardly warped.

[0006] Further, the cutting surface 8,
After applying the sealer 14 to the decorative sheet 9, the decorative sheet 6 is preferably adhered. In this case, the cut medium-density fiberboards 3 and 4 are reinforced by the application of the sealer 14 and the decorative sheet 6 is placed on the sealer 14. 6 can be stuck securely.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the accompanying drawings.

As shown in FIG. 1 (b), the decorative material 7 of this embodiment comprises a core material 2 and a decorative sheet 6 adhered to the outer surface thereof.
It is composed of In this example, the decorative material 7 is used as the frame material 16 of the door 15, but it is not limited to this, and it can be widely used for a baseboard, a surrounding edge, a decorative edge, and the like.

[0009] As shown in FIG.
9 as an intermediate layer, and a medium density fiberboard (MD
F) The three-layered work piece 1 in which the medium-density fiberboard 4 having substantially the same thickness as the medium-density fiberboard 3 on the front surface part 2a is bonded to the back surface part 2b on the back surface part 2b by cutting. It is obtained. In addition, LVL9 is a veneer laminated board (a kind of plywood, in which the fiber direction of each layer is the same), but LVL9 is not always necessary, and this is omitted and two medium-density fiberboards 3, 4 are used. It may have a two-layer structure in which it is directly bonded. In addition, the number of laminations of the plate members constituting the core member 2 may be four or more, and in this case, it is sufficient that the medium-density fiber plates are arranged on at least both front and back surfaces.

A pattern forming groove 5 is formed by cutting in order to apply a decoration process to the medium-density fiberboard 3 on the surface portion 2a side of the core material 2 by using an uneven pattern. The cutting depth D of the pattern forming groove 5 is not particularly limited, and is, for example, in the upper high-density layer 10 shown by the solid line A in FIG. 3, in the middle low-density layer 11 shown by the one-dot chain line B, or in the two-dot chain line. Any of the lower high-density layer 12 shown in FIG. Here, the cutting is performed so that the deepest cutting depth D is 1.8 mm.
Of course, it is not limited to this value. Further, the cross-sectional shape of the pattern forming groove 5 is not limited to the example of FIG.

On the other hand, the medium-density fiberboard 4 on the back surface 2b side of the core material 2 is cut with a cutting depth D 'substantially equal to the cutting depth D of the medium-density fiberboard 3 on the front surface part 2a. I have. here,
Since the deepest cutting depth D on the side of the front surface portion 2a is 1.8 mm and the other portion is cut shallowly,
The cutting depth D 'of b is set to a value slightly smaller than the above 1.8 mm (for example, 1.7 mm). Thus, the fiber density of the medium-density fiber boards 3 and 4 on both front and back sides is not biased, and the occurrence of warpage is suppressed. In the example of FIG. 2, the cut surface 9 of the medium-density fiberboard 4 on the back surface 2 b side is cut into a flat surface. However, the cut surface 9 is not limited to this, and is, for example, the same as the cut surface 8 on the front surface 2 a. Such irregularities may be cut.

The outer surface of the core material 2 (medium density fiberboards 3, 4)
The sealer 14 is applied to each of the cut surfaces 8, 9), and the decorative sheet 6 is adhered thereon with an adhesive or the like. The sealer 14 is for cutting the core material 2 after cutting.
Has the function of reinforcing the adhesive and the function of increasing the adhesive strength of the decorative sheet 6. As the sealer 14, for example, Polydur (polyurethane resin) made by Mikuni Paint
And the conditions of its use were such that the main agent (FS seal coat # 5): curing agent (D05-232): urethane thinner = 1: 1: 1, and the coating amount was 100
g / m ² . Of course, sealer 14
Is not limited to this. The area where the sealer 14 is applied is not limited to the example of FIG.

The medium-density fiberboard 3 on the surface 2a
When the decorative processing is performed by the groove 5 for pattern formation by cutting, the medium-density fiberboard 4 on the back surface 2b side is substantially the same as the cutting depth D of the medium-density fiberboard 3 on the front surface part 2a side. By cutting at the cutting depth D '(≒ D), it is possible to eliminate the deviation of the fiber density between the medium-density fiberboards 3 and 4 on both the front and back surfaces. 2b
The stress balance with the side is maintained, and as a result,
The entire decorative material 7 has a shape that is hardly warped.

By the way, cutting the medium density fiberboard 3,
When the surface layer (skin layer) of No. 4 is removed, not only does the strength of the medium density fiberboards 3 and 4 decrease, but even if the decorative sheet 6 is adhered thereon, the decorative sheet 6 is broken by cutting or the like. Bonding strength with the adhesive becomes poor. Therefore, in the present invention, the sealer 14 is applied to the outer surface of the core material 2 after the cutting, whereby the surface layer is formed again, and the core material 2 is reinforced. By attaching the decorative sheet 6 from above 14,
The decorative sheet 6 can be securely bonded to the medium density fiberboards 3 and 4.

Table 1 shows the experimental results regarding the warpage of the product of the present invention.

[0016]

[0017]

[Table 1]

From the above Table 1, as shown in FIG.
It can be seen that when the cutting depth D ′ of the above is substantially the same as the cutting depth D of the surface portion 2a, the occurrence of warpage can be effectively prevented. When the cut surfaces 8, 9 of the medium-density fiberboards 3, 4 are subjected to the sealer treatment, the strength of the medium-density fiberboards 3, 4 is increased, and the adhesive strength of the decorative sheet 6 is also improved. confirmed.

The thus obtained decorative material 7 is shown in FIG.
As shown in (1), by processing the frame material 16 of the door 15, a high-quality door 15 without warping and deformation can be obtained. In addition, the decorative material 7 of the present invention can be used not only as the frame material 16 of the door 15 but also, for example, by forming the core material 2 to be wide and using the wide core material 2 as the door 15 as it is. It is. Further, in addition to the door 15, it can be widely applied to a baseboard, a surrounding edge, a decorative edge, and the like.

[0020]

As described above, according to the first aspect of the present invention, at least the front surface portion and the back surface portion are made of a medium density fiberboard, and the front side medium density fiberboard has a predetermined cutting depth. Along with cutting the pattern forming grooves, the back side medium-density fiberboard is cut at a cutting depth substantially the same as the front-side medium-density fiberboard to obtain a core material. The decorative sheet is attached to the core, so that the cutting depth of the medium-density fiberboard on the back side is approximately the same as the cutting depth of the medium-density fiberboard on the front side where the pattern forming grooves are formed. The board is cut, so that the stress balance between the front surface side and the back surface side of the core material is maintained, and the entire decorative material is hardly warped, and the effect of suppressing the warpage is obtained. .

According to the second aspect of the present invention, in addition to the effect of the first aspect, the decorative sheet is adhered after applying the sealer to the cut surface of the medium density fiberboard. Medium-density fiberboard can be reinforced by applying a sealer, and furthermore, a decorative sheet can be securely adhered on the sealer,
The adhesive strength can be improved.

[Brief description of the drawings]

FIG. 1 shows an example of an embodiment of the present invention, in which (a) is a front view of a door, and (b) is a cross-sectional view of a frame member.

FIG. 2 is an explanatory diagram in the case of cutting a decorative material to be a frame material of the above.

FIG. 3 is a conceptual diagram of the medium-density fiberboard of the above.

FIG. 4 is an explanatory diagram in the case of cutting a decorative material serving as a conventional frame material.

[Explanation of symbols]

 2 Core material 2a Surface part 2b Back part 3,4 Medium density fiberboard 5 Pattern forming groove 6 Decorative sheet 7 Decorative material 8,9 Cutting surface 14 Sealer D, D 'Cutting depth

Claims (2)

[Claims] At least a front surface portion and a back surface portion are formed of a medium density fiberboard, and a pattern forming groove is cut at a predetermined cutting depth in the front surface side medium density fiberboard and a back surface portion side. The medium-density fiberboard is cut at substantially the same cutting depth as the medium-density fiberboard on the surface side to obtain a core material, and then a decorative sheet is attached to the core material. The method of manufacturing the material. 2. The method for producing a decorative material according to claim 1, wherein a decorative sheet is attached after applying a sealer to the cut surface of the medium density fiberboard.