JP7129838B2 - Method for manufacturing decorative board with wood grain sheet - Google Patents

Description

TECHNICAL FIELD The present invention relates to a decorative board with a wood grain sheet and a method for manufacturing the same.

2. Description of the Related Art Conventionally, a decorative material is widely used in which a decorative sheet is attached to a base material made of plywood to form a design surface. In the configuration disclosed in Patent Document 1, in order to prevent the wood grain and roughness of the base material of the decorative material from appearing on the design surface, a coating film is formed on the surface of the base material to cover the wood grain and roughness. The surface of the base material is smoothed by As a result, the design surface can be made smooth regardless of the state of the surface of the base material.

Japanese Utility Model Publication No. 7-34102

However, in the configuration disclosed in Patent Literature 1, when a wood grain decorative sheet is used, the design surface becomes smooth, so a wood grain texture like that of solid wood cannot be obtained. In view of this, it is conceivable to apply embossing or the like to the decorative sheet to provide wood grain unevenness. not enough. On the other hand, it is conceivable to use solid wood instead of plywood, but if the plate thickness is large, the cost will increase, and the wood grain pattern will depend on the solid wood used, so the degree of freedom in wood grain pattern is low.

The present invention has been made in view of such a background, and provides a method for manufacturing a decorative panel with a wood grain sheet that exhibits a natural wood grain texture, has a high degree of freedom in the wood grain pattern, and is advantageous in terms of cost. I am trying to.

One aspect of the decorative board with wood grain sheet produced in the present invention is a base material made of structural plywood,
a woodgrain sheet covering at least one main surface of the base material and having a woodgrain pattern printed on the design surface;
The main surface of the base material has an uneven surface shape having a plurality of concave base material recesses exhibiting wood grain,
The wood grain direction of the wood grain pattern in the wood grain sheet matches the wood grain direction of the main surface of the base material,
The woodgrain sheet closely adheres to the main surface following the shape of the uneven surface, and the design surface is formed with a recessed sheet recess formed by the woodgrain sheet entering into the substrate recess, and the The woodgrain sheet, in a stretched state, covers the entire surface of one main surface of the base material and the entire surface of the side surface connecting both main surfaces of the base material, and extends from the one main surface to the other main surface. wraps around to cover at least part of the other main surface ,
The woodgrain sheet is a decorative board with a woodgrain sheet that is in close contact with the entire surface of the one main surface and the entire surface of the side surface in a stretched state .

An embodiment of the present invention includes a substrate made of structural plywood, and a woodgrain sheet covering at least one main surface of the substrate and having a woodgrain pattern printed on the design surface, and The main surface of the base material has an uneven surface shape having a plurality of concave base material depressions exhibiting wood grain, and the wood grain direction of the wood grain pattern on the wood grain sheet is the same as the wood grain direction on the main surface of the base material. The woodgrain sheet is in close contact with the main surface following the shape of the uneven surface, and the design surface is formed with a recessed sheet recess formed by the woodgrain sheet entering the substrate recess. The wood grain sheet, in a stretched state, covers the entire surface of one main surface of the base material and the entire side surface connecting the main surfaces of the base material, and covers the one main surface. A method for manufacturing a decorative panel with a wood grain sheet that wraps around from the other main surface to cover at least a part of the other main surface,
A preparation step of preparing the base material;
Using a molding machine having a chamber box divided into an upper chamber box and a lower chamber box,
The base material is placed on a table provided inside the lower chamber box, and the wood grain sheet is arranged between the upper chamber box and the lower chamber box, and the upper chamber box and the By bringing the lower chamber box into contact with the wood grain sheet through the wood grain sheet, the wood grain sheet is positioned at the boundary between the upper chamber box and the lower chamber box while holding the entire outer periphery of the wood grain sheet, dividing the inside of the chamber box into two upper and lower spaces, and keeping each of the upper and lower two spaces in a sealed state;
Both the upper and lower two sealed spaces are evacuated,
Heating the wood grain sheet so that it can be deformed,
While maintaining the vacuum state, the table on which the base material is placed is raised, and the woodgrain sheet is pushed up by the main surface of the base material, so that almost the entire surface of the woodgrain sheet is stretched from the initial state. and
After that, by returning the space in the upper chamber box to the atmospheric pressure while maintaining the space in the lower chamber box in a vacuum state, the pressure difference is used to further extend the wood grain sheet to the substrate. a covering step of wrapping the wood grain sheet so as to cover the entire side surface of the wood and a part of the other main surface in a stretched state, and closely attaching the wood grain sheet to the base material following the shape of the uneven surface; A method for manufacturing a decorative board with a wood grain sheet including

Structural plywood is usually used as wall base materials, floor base materials, roof base materials, etc. of wooden buildings, and is not used as a base material for decorative boards. However, the inventors of the present application have focused on the fact that the main surface of the structural plywood is provided with a plurality of concave substrate recesses to exhibit wood grain. , actively adopting structural plywood. As a result, the main surface of the base material can be made to have wood grain due to the recessed base material recesses. The woodgrain sheet is in close contact with the main surface of the base material in a state where the woodgrain direction of the woodgrain pattern printed on the design surface matches the woodgrain direction of the main surface of the base material, and the woodgrain sheet is the base material. A recessed sheet recess is formed on the design surface of the woodgrain sheet by entering the material recess. Therefore, in terms of design, the wood grain direction of the wood grain pattern on the wood grain sheet and the wood grain direction sensed by the recessed portions of the sheet match, so that the decorative panel with the wood grain sheet exhibits a natural wood grain texture. Become. Furthermore, since the woodgrain pattern is printed on the woodgrain sheet, the woodgrain pattern has a higher degree of freedom than when solid wood is used. Moreover, since the base material is made of structural plywood, it is advantageous in terms of cost compared to using solid wood.

Further, in the method for manufacturing a decorative board with a woodgrain sheet according to the above aspect, in the covering step, the woodgrain sheet is brought into close contact with the base material following the uneven surface shape of the main surface of the base material under reduced pressure. Therefore, compared with the case of pressing, the wood grain sheet can be more reliably inserted into the recesses of the base material exhibiting wood grain on the main surface. As a result, it is possible to reliably form sheet recesses along the wood grain direction of the wood grain pattern on the design surface, and to provide the decorative panel with the wood grain sheet that exhibits a natural wood grain texture.

As described above, according to the present invention, it is possible to provide a decorative panel with a woodgrain sheet that exhibits a natural woodgrain texture, has a high degree of freedom in woodgrain patterns, and is advantageous in terms of cost.

FIG. 2 is a perspective view of a decorative panel with a wood grain sheet according to the first embodiment; FIG. 2 is a partially enlarged cross-sectional view taken along line II-II in FIG. 1; 3 is a perspective view of a base material and a woodgrain sheet before being attached in Embodiment 1. FIG. FIG. 4 is a conceptual diagram showing a method for manufacturing a decorative board with a woodgrain sheet according to Embodiment 1; FIG. 2 is a first conceptual diagram showing a covering step in Embodiment 1; FIG. 2 is a second conceptual diagram showing a covering step in Embodiment 1;

The woodgrain sheet covers one main surface of the base material and a side surface connecting both main surfaces of the base material, and wraps around the other main surface from the one main surface to the other main surface. can cover at least part of the In this case, not only one main surface of the base material, but also the side surface and part of the other main surface are covered with the wood grain sheet, so that the side surface of the base material can be visually recognized even when observed from the side surface side. Since the wood grain pattern of the wood grain sheet is visually recognized in a state where it is continuous with the main surface without being peeled off, the decorative board with the wood grain sheet can give the viewer an impression as if it were made of solid wood.

It is preferable that a recessed portion and a missing portion having a size equal to or larger than a reference value formed on one main surface of the base material are filled with a filler. In this case, recessed parts and missing parts larger than the standard value are hidden so that the recessed parts and missing parts do not appear on the design surface, and the recessed parts of the base material exhibiting wood grain are maintained and the design surface is covered. The sheet recesses along the grain of the base material can be formed more accurately. As a result, it is possible to exhibit a more natural wood grain texture.

It is preferable that the maximum depth of the concave portion of the base material is within the range of 0.2 to 3.5 mm. In this case, since the recessed portions of the sheet along the wood grain of the base material are formed with an appropriate depth on the design surface and are easily visible, a more natural wood grain texture can be presented.

Further, in the method for manufacturing a decorative board with a woodgrain sheet, after the preparation step and before the coating step, recessed portions and missing portions having a size equal to or larger than a reference value on one main surface of the base material are filled. It is preferable to include a repair step of filling the agent. In this case, before coating the base material with the wood grain sheet, the recessed portions and the missing portions having a size equal to or larger than the standard value are filled with a filler, so that the recessed portions and the missing portions are reliably concealed and the design surface is improved. It is possible to prevent depressions and defects from appearing in the

(Embodiment 1)
An embodiment of a decorative panel with a woodgrain sheet will be described with reference to FIGS. 1 to 4. FIG.
As shown in FIG. 1 , the woodgrain sheet-attached decorative board 1 of the present embodiment includes a base material 10 and a woodgrain sheet 20 .
As shown in FIGS. 2 and 3, the base material 10 is made of structural plywood 10a.
As shown in FIG. 2, the woodgrain sheet 20 covers at least one main surface 101 of the base material 10, and as shown in FIG. is printed.
As shown in FIG. 3 , the wood grain direction P of the wood grain pattern 22 on the wood grain sheet 20 matches the wood grain direction Q on the main surface 101 of the base material 10 .
As shown in FIG. 2, the main surface 101 of the base material 10 has an uneven surface shape 15 having a plurality of concave base material recesses 11 exhibiting wood grain.
The woodgrain sheet 20 adheres closely to the main surface 101 following the uneven surface shape 15, and the design surface 21 is formed with a recessed sheet recess 23 in which the woodgrain sheet 20 enters the substrate recess 11. there is
In addition, the main surface refers to each of a pair of surfaces having the largest area in the plate-like object. In this embodiment, the main surfaces 101 and 102 are the front side and the back side of the structural plywood 10a shown in FIG.

The decorative board 1 with a woodgrain sheet according to the present embodiment will be described in detail below.
The veneer 1 with a woodgrain sheet of this embodiment can be used as a shelf board for storage furniture or the like, a top board for a table or the like, or a plate material constituting other fittings.

The structural plywood 10a that constitutes the base material 10 of the decorative board 1 with wood grain sheet is a structural plywood specified by Japanese Agricultural Standards (JAS). The structural plywood 10a is, as shown in FIG. 4(a), a plywood made by stacking a plurality of veneers and bonding them together with an adhesive. Although not shown, each veneer is laminated so that the fiber direction (that is, grain direction) is orthogonal. In the structural plywood 10a, the front veneer and the back veneer usually have the same wood grain direction, but this is not restrictive.

In the above JAS, the surface quality of structural plywood is classified into A to D, but the surface quality of the structural plywood 10a in this embodiment is not particularly limited, and C, which is usually used for buildings, is used. -C, CD. When the surface quality of the front surface and the back surface is different, such as CD, it is preferable to use the surface with the higher quality as the main surface 101 to be covered with the woodgrain sheet 20 . Further, although the above JAS classifies the degree of bonding in structural plywood into special class and class 1, the structural plywood 10a in this embodiment is not particularly limited. In addition, although the above JAS classifies the strength of structural plywood into grades 1 and 2, the strength grade of the structural plywood 10a in the present embodiment is not particularly limited. can be adopted. Moreover, when higher strength is required, grade 1 having higher strength can be adopted.

As shown in FIG. 3, the structural plywood 10a has a long plate shape. The size of the structural plywood 10a is not limited, but the length of the short side and the length of the long side are standardized lengths such as 910 mm x 1820 mm, 910 mm x 2440 mm, 910 mm x 2730 mm, and 910 mm x 3030 mm. can do. The thickness of the structural plywood 10a is also not limited, but can be standardized thicknesses such as 9 mm, 12 mm, 15 mm, 18 mm, 24 mm, and 28 mm, for example. The structural plywood 10a may be cut into a desired size from a standardized size according to the application. In this embodiment, the direction parallel to the long sides of the structural plywood 10a is the longitudinal direction Y, the direction parallel to the short sides is the width direction X, and the direction perpendicular to the longitudinal direction Y and the width direction X is the thickness direction Z. and

As shown in FIG. 2, one main surface 101 of the base material 10 made of the structural plywood 10a has an uneven surface shape 15. As shown in FIG. The uneven surface shape 15 has a plurality of substrate concave portions 11 and substrate convex portions 12 . The substrate concave portion 11 is formed in a concave shape and extends generally in the longitudinal direction Y. As shown in FIG. The base material recesses 11 are arranged in the width direction X, and convex base material protrusions 12 are formed between the adjacent base material recesses 11 to form wood grain on the main surface 101 . The substrate concave portion 11 is formed by a portion corresponding to the spring material 11a of the veneer forming the outermost layer of the structural plywood 10a, and the substrate convex portion 12 is formed by a portion corresponding to the summer material 12a. . Although the depth of the substrate recess 11 is not particularly limited, the maximum depth H0 of the substrate recess 11 (that is, the distance in the thickness direction between the top of the substrate projection 12 and the bottom of the substrate recess 11) is It is in the range of 0.2-3.5 mm, preferably in the range of 0.2-2.0 m.

The uneven surface shape 15 may include recesses or protrusions other than the substrate recesses 11 and the substrate protrusions 12 . In this embodiment, as shown in FIG. 2, cracks 14 are formed in the main surface 101 of the substrate 10 . The cracks 14 are filled with a filler 30 , and the surface of the filler 30 is smoothly connected to the substrate concave portion 11 .

As shown in FIG. 2 , a woodgrain sheet 20 is attached to the main surface 101 of the base material 10 . Although the material of the woodgrain sheet 20 is not particularly limited, it can be made of resin. For example, vinyl chloride resin, olefin resin, polyethylene terephthalate resin, or the like can be used as the material of the woodgrain sheet 20. In this example, a resin sheet made of vinyl chloride is used.

In addition, in the embodiment, as shown in FIG. 4C, the woodgrain sheet 20 covers the entire area of one main surface 101 of the base material 10 and also covers the entire side surface 103 connected to the main surface 101. It wraps around the other main surface 102 of the substrate 10 so as to cover the edge of the other main surface 102 . In the woodgrain sheet 20 , the surface opposite to the surface facing the main surface 101 of the base material 10 is exposed to form a design surface 21 . An adhesive (not shown) is applied to the surface of the woodgrain sheet 20 facing the principal surface 101 to maintain close contact with the principal surface 101 . A primer may be included between the base material 10 and the woodgrain sheet 20 to enhance the adhesion between the two.

As shown in FIG. 3 , a wood grain pattern 22 is printed on the design surface 21 of the wood grain sheet 20 . In this embodiment, the grain pattern 22 is formed so as to extend in the longitudinal direction Y. As shown in FIG. The shape of the grain pattern 22 is not particularly limited, and a desired grain pattern can be adopted. The wood grain direction P of the wood grain pattern 22 matches the wood grain direction Q of the main surface 101 of the base material 10 .

Next, a method for manufacturing the decorative board 1 with a woodgrain sheet will be described.
The manufacturing method of the woodgrain sheet-attached decorative board 1 of the present embodiment includes a preparation step S1, a repair step S2, and a covering step S3 shown in FIGS. 4(a) to 4(c).
In the preparation step S1 shown in FIG. 4(a), the base material 10 is prepared. In the present embodiment, as the structural plywood 10a constituting the base material 10, a 24 mm thick coniferous plywood (Japanese cedar) special class, board surface quality type CD is used. The surface having the plate surface quality C is used as the main surface 101 to which the woodgrain sheet 20 is attached.

Next, in the repair step S2 shown in FIG. 4(b), it is inspected whether or not there is a defective portion or recessed portion having a size equal to or larger than the reference value on the main surface 101 of the base material 10. If a recessed portion or recessed portion is found, the missing portion or recessed portion is filled with a predetermined filler. In this embodiment, as shown in FIG. 2, the depth H1 of the crack 14 as the missing/depressed portion is greater than or equal to the reference value, so the crack 14 is filled with a predetermined filler 30 . Although the type of filler is not particularly limited, it is preferable to use a filler that has a hardness comparable to that of the base material 10 after curing.

The “size of the missing portion/depression” in the repairing step S2 may be the size in the longitudinal direction Y or the width direction X of the missing portion/depression, or may be the depth in the thickness direction Z. The number of times the putty is filled is not particularly limited, but when the putty is filled once, the state after drying is observed, and if the size of the defect/depression is still equal to or larger than the standard value, the putty may be filled again. In addition to the cracks 14, the defect/depression formed on the main surface 101 of the base material 10 includes missing knots, raw knots, dead knots, cracks, chipped edges, scratches, and the like. In addition, it is preferable that the missing portion/depression portion after filling is in a state in which a slight dent less than the reference value remains. This is because if the missing part or recessed part after filling is excessively flattened, after covering with the wood grain sheet 20, the part will be observed as floating from the surroundings on the design surface 21, which is unnatural. .

The reference value in the repairing step S2 is a value larger than the maximum depth H0 (see FIG. 2) of the substrate recess 11, and can be appropriately set according to the type of the defect/depression. For example, if the defect/depression is a knot, the reference value should be greater than or equal to the depth at which the lower layer is exposed through the surface layer of the structural plywood 10a, or if the defect/depression is a crack. The width of the crack may be 1.0 mm or more, or if the chipped portion or recessed portion is chipped at the edge, the chip size may be 3.0 mm or more along the edge and 3.0 mm or more inward. . In addition, when there is no defective part or recessed part having a size equal to or larger than the reference value, the later-described covering step S3 is performed without filling the filler 30 . In this embodiment, the structural plywood 10a is used substantially as it is as the base material 10 without smoothing the surface of the structural plywood 10a, except for repairing recessed portions and missing portions. Therefore, the uneven surface shape of the main surfaces 101 and 102 of the base material 10 is substantially inherited from the uneven surface shape of the main surface of the structural plywood 10a.

After the repairing step S2, in the covering step S3 shown in FIG. 4C, the woodgrain sheet 20 is covered with the woodgrain direction P of the woodgrain pattern 22 and the woodgrain on one main surface 101 of the base material 10 as shown in FIG. With the direction Q aligned, the wood grain sheet 20 is stretched so as to cover one main surface 101 and side surface 103 of the base material 10 as shown in FIG. It wraps around from the main surface 101 to the other main surface 102 to cover the base material 10, and the woodgraining sheet 20 is adhered to the base material 10 along the uneven surface shape 15 under reduced pressure. In FIG. 4(c), both the wood grain directions P and Q are in the front-to-rear direction of the paper surface of FIG. 4(c).

In this embodiment, the coating step S3 is performed as follows using the vacuum forming machine 5 shown in FIGS. 5(a) to 6(b). As shown in FIG. 5( a ), the vacuum forming machine 5 has a chamber box 50 divided vertically into an upper chamber box 51 and a lower chamber box 52 . First, the substrate 10 is placed on the table 53 provided inside the lower chamber box 52, and the entire outer periphery is held by the frame 54 between the upper chamber box 51 and the lower chamber box 52. The wood-grained sheet 20 is arranged. As a result, the wood grain sheet 20 is positioned at the boundary between the upper and lower chamber boxes 50, and the interior of the chamber box 50 is divided into upper and lower spaces. Then, each of the upper and lower spaces is sealed. Thereafter, both the upper and lower sealed spaces are evacuated, and the wood grain sheet 20 is heated so as to be deformable. The wood grain sheet 20 is pushed up by the main surface 101 of the material 10.例文帳に追加As a result, the woodgrain sheet 20 as a single piece is in a state in which almost the entire surface is stretched from the initial state. After that, while maintaining the space in the lower chamber box 52 in a vacuum state, the space in the upper chamber box 51 is returned to the atmospheric pressure. As a result, using the pressure difference, the wood grain sheet 20 is further stretched to cover the entire side surface 103 and part of the other main surface 102 of the base material 10 in the stretched state. Then, although not shown, after returning the space in the lower chamber box 52 to the atmospheric pressure, the excess woodgraining sheet 20 is cut off inside the edge of the other main surface 102 of the base material 10, and the covering step S3 is performed. to complete.

By performing the steps S1 to S3 as described above, the decorative board 1 with the wood grain sheet is completed. After the covering step S3, a wood grain sheet (not shown) may be attached to the other main surface 102 of the base material 10 so that the main surface 102 is not exposed.

Next, the effects of the woodgrain sheet-attached decorative panel 1 of the present embodiment will be described in detail.
In the decorative board 1 with a woodgrain sheet of the present embodiment, it has been used as a wall base material, a floor base material, a roof base material, etc. of a wooden building in the past, and has not been used as a base material for a structural board. The plywood 10a is positively adopted as the base material 10. - 特許庁Since the main surface 101 of the structural plywood 10a is provided with a plurality of recessed base material recesses 11 and exhibits wood grain, by adopting the structural plywood 10a as the base material 10, the main surface 101 of the base material 10 can be The recessed base material concave portion 11 can provide a wood grain state. The woodgraining sheet 20 is brought into close contact with the main surface 101 of the base material 10 in a state in which the woodgrain direction P of the woodgrain pattern 22 printed on the design surface 21 matches the woodgrain direction Q of the main surface 101 of the base material 10 . The woodgrain sheet 20 enters the base recess 11 to form a recessed sheet recess 23 in the design surface 22 of the woodgrain sheet 20 . Therefore, on the design surface 21, the wood grain direction P of the wood grain pattern 22 on the wood grain sheet 20 and the wood grain direction Q sensed by the sheet recesses 23 match, so that the decorative panel 1 with the wood grain sheet has a wood grain with a natural texture. It will exhibit the texture of Furthermore, since the woodgrain pattern 22 is printed on the woodgrain sheet 20, the woodgrain pattern 22 has a higher degree of freedom than when solid wood is used. Moreover, since the base material 10 is made of the structural plywood 10a, it is advantageous in terms of cost compared to the case of using solid wood.

In addition, in the present embodiment, the woodgrain sheet 20 covers one main surface 101 of the base material 10 and a side surface 103 connecting both main surfaces 101 and 102 of the base material 10, and also covers the main surface 101 from the one main surface 101 to the other. , and covers at least a portion of the other main surface 102 . As a result, not only one main surface 101 of the base material 10 but also the side surface 103 and part of the other main surface 102 are covered with the woodgrain sheet 20, so that the base material can be seen even when viewed from the side. Since the side surface 103 of the wood grain sheet 20 is not visually recognized and the wood grain pattern 22 of the wood grain sheet 20 is visually recognized in a continuous state with the main surface 101, an observer is given the impression that the decorative board 1 with the wood grain sheet is made of solid wood. can give.

Further, in the present embodiment, cracks 14 as depressions and defects having a size equal to or larger than a reference value formed on one main surface 101 of the base material 10 are filled with a filler. As a result, the cracks 14 having a size equal to or larger than the reference value are concealed so that the cracks 14 do not appear on the design surface 21, and the base material concave portions 11 exhibiting wood grain are maintained, and the base material 10 is formed on the design surface 21. The sheet recesses 23 along the wood grain can be formed more accurately. As a result, it is possible to exhibit a more natural wood grain texture.

Further, in the present embodiment, the maximum depth H0 of the substrate concave portion 11 is set to be within the range of 0.2 to 3.5 mm. As a result, the sheet recesses 23 along the wood grain of the base material 10 are formed on the design surface 21 with an appropriate depth and are easily visible, so that a more natural wood grain texture can be presented.

In the method for manufacturing the decorative board 1 with the woodgrain sheet of the present embodiment, in the covering step S3, the woodgrain sheet 20 is stretched to cover the main surface 101 and the side surface 103 of the base material 10 and wrap around the other main surface 102. Then, the woodgrain sheet 20 is brought into close contact with the base material 10 in a decompressed state following the uneven surface shape 15 of the main surface 101 of the base material 10 . Therefore, the woodgrain sheet 20 can be more reliably inserted into the substrate concave portion 11 exhibiting the woodgrain of the main surface 101 as compared with the case of pressing or the like. As a result, the sheet concave portion 23 along the wood grain direction P of the wood grain pattern 22 is surely formed on the design surface 21, and the decorative panel 1 with the wood grain sheet presenting the texture of the wood grain with a natural texture can be provided.

In addition, in the present embodiment, the method for manufacturing the woodgrain sheet-attached decorative board 1 is such that, after the preparation step S1 and before the covering step S3, a depression having a size equal to or larger than a reference value in one main surface 101 of the base material 10 is performed. It includes a repairing step S2 of filling the filler in the part and the missing part. As a result, before the base material 10 is coated with the woodgrain sheet 20, the recessed portions and the missing portions having a size equal to or larger than the reference value are filled with the filler, so that the recessed portions and the missing portions are reliably concealed and the design is improved. It is possible to prevent the surface 21 from appearing with depressions and defects.

As described above, according to the present embodiment, it is possible to provide the decorative panel 1 with a woodgrain sheet that exhibits a natural woodgrain texture, has a high degree of freedom in the woodgrain pattern 22, and is advantageous in terms of cost. .

The present invention is not limited to the above embodiments, and can be applied to various embodiments without departing from the scope of the invention.

1 Decorative board with wood grain sheet 10 Base material 10a Structural plywood 11 Base material recess 20 Wood grain sheet 21 Design surface 22 Wood grain pattern 23 Sheet recess P, Q Wood grain direction

Claims (3)

A base material made of structural plywood, and a wood grain sheet covering at least one main surface of the base material and having a wood grain pattern printed on the design surface, wherein the main surface of the base material has an uneven surface shape having a plurality of concave base material recesses exhibiting wood grain, and the wood grain direction of the wood grain pattern in the wood grain sheet coincides with the wood grain direction on the main surface of the base material, and the The woodgrain sheet closely adheres to the main surface following the shape of the uneven surface, and the design surface is formed with a recessed sheet recess formed by the woodgrain sheet entering the substrate recess, and the woodgrain. The tone sheet, in a stretched state, covers the entire surface of one main surface of the base material and the entire surface of the side surface connecting the two main surfaces of the base material, and extends from the one main surface to the other main surface. A method for manufacturing a decorative board with a woodgrain sheet that wraps around and covers at least a part of the other main surface,
A preparation step of preparing the base material;
Using a molding machine having a chamber box divided into an upper chamber box and a lower chamber box,
The base material is placed on a table provided inside the lower chamber box, and the wood grain sheet is arranged between the upper chamber box and the lower chamber box, and the upper chamber box and the By bringing the lower chamber box into contact with the wood grain sheet through the wood grain sheet, the wood grain sheet is positioned at the boundary between the upper chamber box and the lower chamber box while holding the entire outer periphery of the wood grain sheet, dividing the inside of the chamber box into two upper and lower spaces, and keeping each of the upper and lower two spaces in a sealed state;
Both the upper and lower two sealed spaces are evacuated,
Heating the wood grain sheet so that it can be deformed,
While maintaining the vacuum state, the table on which the base material is placed is raised, and the woodgrain sheet is pushed up by the main surface of the base material, so that almost the entire surface of the woodgrain sheet is stretched from the initial state. and
After that, by returning the space in the upper chamber box to the atmospheric pressure while maintaining the space in the lower chamber box in a vacuum state, the pressure difference is used to further extend the wood grain sheet to the substrate. a covering step of wrapping the wood grain sheet so as to cover the entire side surface of the wood and a part of the other main surface in a stretched state, and closely attaching the wood grain sheet to the base material following the shape of the uneven surface;
A method for manufacturing a decorative board with a wood grain sheet. 2. The method according to claim 1, further comprising, after the preparation step and before the coating step, a repair step of filling recessed portions and defective portions having a size equal to or larger than a reference value on one main surface of the base material with a filler. A method for manufacturing a decorative board with a wood grain sheet. 3. The method for manufacturing a decorative panel with a woodgrain sheet according to claim 1, wherein the maximum depth of the concave portion of the base material is in the range of 0.2 to 3.5 mm.

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