JP2003191208A - Decorative plate and method for forming narrow channel therein - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for forming a V-shaped, curved, narrow channel having a good surface shape and applying beautiful coating to the formed chan nel in a decorative plate, and also to provide the decorative plate. <P>SOLUTION: By cutting the surface of the decorative plate 1 in which a surface decorative material 12 of an oak veneer 1 mm in thickness is stuck on the surface of a woody base material 11 mm in thickness made of five-ply plywood by using a circular sawing machine, the narrow channel (V-channel) 13a having a V-shaped cross section 110 degree in opening angle is formed. After that, by pressing the channel 13a by a hot press roll having a shaping projected part with a shaping surface recessed in a curved shape, the outside angular part of the channel 13a is formed in an outward projected curved shape. The channel 13a is formed in the final curved V-shape by polishing the surface of the channel 13b with the outside angular part formed in the outward projected curved shape by using a cross sander type polishing apparatus. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a narrow groove on a surface of a decorative board used as, for example, a floorboard, and more particularly, to a chamfered shape in which an outer corner portion projects outward. The present invention relates to a fine groove forming method for forming curved V-shaped fine grooves formed on a surface of a decorative plate.

[0002]

2. Description of the Related Art For example, as a decorative board for a floor board, FIG.
As shown in (a) and (b), it is general that a surface decorative material 52 such as a veneer is attached to the surface of a wooden base material 51 made of plywood or the like. In some cases, a plurality of fine grooves 53, 53a may be formed on the surface of the decorative plates 50, 50a in order to make the joints between the decorative plates 50, 50a inconspicuous and to enhance the decorative effect.

Up to now, the thin grooves formed on such a decorative plate have generally been V-shaped in cross section like the thin groove 53 shown in FIG. In order to obtain a three-dimensional effect and a soft feeling, a curved V-shaped chamfer is adopted, such as a narrow groove 53a shown in FIG. 3B, in which both outer corners are outwardly protruded. As shown in FIG. 8, the curved V-shaped narrow groove 53a is formed on the surface of the surface decorative material 52 such as a veneer or the like adhered to the wood base material 51. Convex portion 6 for forming a groove that is depressed in a curved shape
It was formed by pressing with the hot-press roll 60 having No. 1.

[0004]

By the way, as described above, the curved V-shaped narrow groove 53a is formed by pressing the surface of the decorative plate 50 using the hot pressing roll 60 having the groove forming convex portion 61. When forming, the narrow groove 53 having a smooth surface
Although there is an advantage that a can be easily formed in a short time, the fine groove 53a has a surface portion compressed to have a high density and the hot press roll 60a.
Since the wood component of the surface decorative material 52 forms a layer on the surface side of the narrow groove 53a when pressed by the thin groove 53a.
In the coating process performed after the formation of the ridge, there is a problem that the fine groove 53a portion cannot be easily coated with the paint, or the fine groove 53a portion cannot be coated cleanly.

The narrow groove 53a formed by the above method is formed by forcibly expanding the surface of the decorative plate 50, and the groove portion is not cut off. A restoring force that tends to return to the original flat state always acts on the formed narrow groove 53a portion. Therefore, after a certain amount of time has elapsed after forming the narrow groove 53a on the decorative plate 50, the groove width and the groove depth gradually decrease due to the springback of the narrow groove 53a portion of the decorative plate 50, and the initial groove shape is obtained. There is also a problem that it becomes impossible to hold.

Therefore, an object of the present invention is to form a curved V-shaped narrow groove having a good surface quality, and to apply a clean coating to the formed curved V-shaped narrow groove portion. It is possible to provide a method for forming a narrow groove in a decorative plate and a decorative plate that can be used.

[0007]

In order to solve the above problems, the method for forming a narrow groove of the present invention according to claim 1 forms a narrow groove having a V-shaped cross section by cutting the surface of a decorative plate. After the formation, the thin groove formed in the V-shaped cross section is formed in the V-shaped cross section by pressing it with a hot-press roll or a hot-pressing plate having a groove-forming convex portion in which the molding surface is recessed in a curved shape. By forming the outer corner portion of the narrow groove formed into a curved shape projecting outward, and polishing the surface of the narrow groove formed into a curved shape with the outer corner portion projecting outward, It was shaped like a groove. The “curved shape” used in the present specification may be a substantially curved shape, and also includes a shape having a linear portion in part.

As described above, this thin groove forming method differs from the conventional method in which a curved V-shaped thin groove is formed by pressing the surface with a hot pressing roll or the like, and the groove surface is formed with a hot pressing roll or the like. After pressing, the outer corners of the V-shaped cross section of the narrow groove are formed into a curved shape protruding outward, and the surface of the narrow groove is polished to increase the density of the narrow groove. Since the surface layer is removed, in the coating process performed after forming the narrow groove,
The paint does not easily soak into the narrow groove portion and is not repelled, and a fine coating can be applied to the narrow groove portion.

Further, in the step of polishing the surface of the narrow groove, the outer corner portion of the narrow groove having a V-shaped cross section is formed into a clean outwardly protruding curved shape by the previous hot pressing step. Therefore, the fine groove can be easily shaped by polishing, and is comparable to the case where the conventional method of forming the curved V-shaped fine groove by pressing the surface with a hot press roll or the like is adopted. To some extent, it is possible to form fine grooves having good surface properties.

Further, in this fine groove forming method, the surface of the fine groove is polished in the final step. Therefore, in the hot pressing step performed before that, the amount of the thickness removed in the final polishing step is used. No need to compress, but the amount of compression in the narrow groove portion is smaller than in the conventional method in which the curved V-shaped narrow groove is formed by pressing the surface with a hot press roll etc. There is also an effect that it is possible to effectively suppress the shape change due to the spring back in the formed narrow groove.

In particular, as in the method for forming a narrow groove according to the second aspect of the present invention, the surface of the narrow groove, which is formed in a curved shape with its outer corners protruding outward, is polished by a cross sander. If left unattended, clogging of the sanding belt, sanding paper, etc. will be reduced, and polishing can be performed efficiently. In addition, "cross thunder" here
Is one of the polishing methods, in which the makeup belt is moved by moving the sanding belt or sanding sheet in the width direction of the narrow groove while the sanding belt or sanding sheet is in contact with the narrow groove formed on the decorative plate. It means a method of polishing the surface of a plate or the surface of a narrow groove.

In order to solve the above problems, the invention according to claim 3 provides a decorative plate having a surface formed with a fine groove, wherein the fine groove is a V groove formed by cutting the surface. The decorative plate is characterized in that both outer corners of the V groove are formed into a curved shape protruding outward by pressing and then the groove surface is polished to be shaped into a predetermined groove shape. Is provided.

In the decorative plate having the above-mentioned structure, the outer corners of the V-shaped groove are formed into a beautiful curved shape protruding outward at the stage of polishing the surface of the fine groove, and the fine shape by polishing is reduced. Since the groove can be easily shaped, the surface of the groove can be cleaned to the same extent as the conventional decorative plate with curved V-shaped groove formed by pressing the surface with a hot press roll. Since the surface of the narrow groove is polished, the surface layer portion with a high density is removed by polishing the surface of the narrow groove. It is possible to apply a beautiful coating to the narrow groove portion without the coating material becoming difficult to permeate or repel the groove portion. Furthermore, since the amount of compression of the narrow groove portion of this decorative plate is smaller than that of the above-described conventional decorative plate, the shape change of the narrow groove due to springback can be suppressed.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments will be described below with reference to the drawings. As shown in FIGS. 1 (a) and 1 (b),
The decorative board 1 is a surface-modifying material 12 made of a 1 mm-thick single veneer laminated on the surface of a wood base material 11 made of 5-ply plywood and having a thickness of 11 mm. The outer V corners are chamfered in a curved shape protruding outward, and have a curved V-shaped narrow groove 1 having a curved groove surface.
3 is formed.

As the wood base material 11, 3-ply plywood, particle board, medium quality fiberboard (MDF),
It is also possible to form the composite wood made of a thermoplastic resin and wood powder, etc., and the surface decorative material 12 is made of oak, oak, duck, hippo, cherry, beech, etc. and has a thickness of about 0.25 mm. In addition to the thin veneer, the veneer, beech, and the like having a thickness of about 1.00 mm, paper (including reinforcing paper), a plastic sheet, or the like can be used.

A method of forming the curved V-shaped fine groove 13 in the decorative plate 1 having the above-described structure will be described below. First, by cutting the surface of the surface decorative material 12 using a circular saw having an edge angle of 110 degrees, as shown in FIG. 2, the surface of the surface decorative material 12 has a depth of 0.8 mm and an opening angle of A narrow groove (V groove) 13a having a V-shaped cross section of 110 degrees is formed. Although the narrow groove 13a having a V-shaped cross section with an opening angle of 110 degrees is formed here, the invention is not limited to this, and the opening angle of the narrow groove 13a is 90 to 90.
It may be appropriately determined within the range of 140 degrees.

Subsequently, as shown in FIGS. 3A and 3B, the groove surface of the thin groove 13a having a V-shaped cross section is shaped into a shaping surface 21a.
Has a groove-shaping convex portion 21 that is depressed in a curved shape, 300 ° C.
By pressing with the hot-press roll 20 heated to a certain degree, as shown by the solid line in FIG. 5A, the outer corner portion of the narrow groove (V groove) 13a formed in a V-shaped cross section. Is formed in a curved shape protruding outward. Note that FIG.
In, the part surrounded by the one-dot chain line and the solid line is
This is the part that is compressed in this step.

In this way, the narrow groove (V
When the outer corner portion of the groove 13a is formed in a curved shape protruding outward, a cross-sander polishing device 30 as shown in FIGS. When the surface of the narrow groove 13b is cut as indicated by a solid line in), a curved V-shaped narrow groove 13 is formed on the surface of the decorative plate 1 as shown in FIG. In addition, in FIG. 5B, a portion surrounded by a two-dot chain line and a solid line is a portion to be polished and removed in this step.

As shown in FIG. 4 (a), the polishing apparatus 30 includes an endless sanding belt 31 and a pulley 32 that circulates the sanding belt 31 with its sanding surface facing outward. The circulating movement mechanism (not shown) and the sanding surface of the sanding belt 31 are pressed against the object to be polished, and the tip angle is 110.
And a sanding pad 33 for rotating the sanding pad 33. As shown in FIG. 2B, the sanding belt 31 that is circulatingly moved is locally pushed into the narrow groove (V groove) 13b by the sanding pad 33. , Narrow groove (V groove) 1
By bringing the sanding belt 31 into contact with the curved surface of 3b, the fine groove (V groove) 13b is curved to a predetermined curvature V.
It is designed to be shaped like a letter. Although the sanding pad 33 having a tip angle of 110 degrees is used here, the invention is not limited to this, and the opening angle of the narrow groove 13a having a V-shaped cross section formed in the initial cutting process is used. In addition, it may be appropriately set within the range of 90 to 140 degrees.

As described above, according to this thin groove forming method, the thin groove (V
By pressing the groove 13a with the hot press roll 20,
After the outer corners of the narrow groove 13a are formed in a curved shape protruding outward, the surface of the narrow groove 13b is polished to shape it into a predetermined curved V-shape. By the cutting process, the surface layer portion having a high density in the narrow groove 13b is removed.

Therefore, as in the conventional decorative plate in which curved V-shaped narrow grooves are formed by pressing the surface with a hot press roll or the like, a surface layer portion having a high density remains in the narrow groove portions, In the subsequent coating step, the fine groove 13 is formed by this fine groove forming method without making it difficult for the coating material (for example, ultraviolet curable coating material) to soak into the fine groove portion or repelling it. With the decorative plate 1, a fine coating can be applied to the narrow groove 13 portion.

In the final polishing step, the cross section V
Since the outer corners of the narrow groove 13a formed in the shape of a letter are already formed into a clean outwardly curved shape by the previous hot pressing step, the narrow groove 13a is formed by polishing.
b can be easily shaped into a predetermined curved V-shape, and is comparable to the case where the conventional method of forming curved V-shaped narrow grooves by pressing the surface with a hot press roll or the like is adopted. It is possible to form the fine groove 13 having a good surface quality.

Further, in this fine groove forming method, since the surface of the fine groove 13b is polished in the final step, the thickness removed in the final polishing step in the hot pressing step performed before that. As compared with the conventional method in which the curved V-shaped narrow groove is formed by pressing the surface with a hot press roll or the like, the amount of compression in the narrow groove 13 portion becomes smaller and the predetermined shape is temporarily reduced. It is also possible to obtain an effect that it is possible to effectively suppress the shape change due to the spring back in the narrow groove 13 formed in the above.

Specifically, a sample piece made of a decorative plate 1 having a curved V-shaped narrow groove 13 formed by the above-described narrow groove forming method and a similar curved V-shape by pressing the surface with a hot press roll or the like. Sample pieces made of a conventional decorative plate having a groove-like narrow groove are prepared, and the dimension of the groove before the sample piece is immersed in water and the dimension of the groove after the sample piece is immersed in water for 48 hours. When each of the test pieces is measured, the dimensional change amount of the fine groove 13 in the decorative plate 1 is small as compared with the dimensional change amount of the narrow groove in the conventional decorative plate, and compared with the conventional decorative plate, It can be seen that in the decorative plate 1 according to the present invention, the shape change caused by the springback of the narrow groove is effectively suppressed. The dimension of the narrow groove measured for each test piece is 1/4 of the entire width of the narrow groove from one side in the width direction of the narrow groove.
It is the depth of the narrow groove at a position biased toward the center side only.

Further, according to this fine groove forming method, in the polishing step, the surface of the fine groove 13b formed in the curved shape with the outer corners protruding outward is polished by the polishing apparatus 30 of the cross sander system. Therefore, the sanding belt 31 and the like are less likely to be clogged, and the polishing process can be performed efficiently.

In the above-described embodiment, in the polishing step, the curved groove surface of the narrow groove 13b, which is formed in a curved shape with the outer corners protruding outward, is partially polished. However, the present invention is not limited to this, and for example, as shown by the solid line in FIG. 6, in the polishing step, the curved groove surface of the narrow groove 13b formed in the curved shape with the outer corners protruding outward ( (Indicated by a chain double-dashed line in the figure) may be entirely polished.
However, in that case, the fine groove 13b after the hot pressing is so shaped that the fine groove 13b is shaped into a predetermined curved V shape by polishing the curved groove surface of the fine groove 13b as a whole.
Shape, that is, the groove-shaping convex portion 2 in the hot-press roll 20.
It is necessary to set the shape of 1.

In the above-described embodiment, the case where the depth of the curved V-shaped narrow groove 13 is shallower than the thickness of the surface decorative material 12 has been described, but the present invention is not limited to this, and the curved V-shaped. Needless to say, the narrow grooves 13 may extend to the wood base material 11.

Further, in the above-described embodiment, the shaping surface 21 is used.
A cross-section V is obtained by roll pressing using a hot-press roll 20 having a groove-shaping convex portion 21 in which a is concavely curved.
The outer corners of the narrow groove 13a formed in a V-shape are formed to have a curved shape protruding outward, but the invention is not limited to this, and a similar groove-shaping convex portion is provided. It is also possible to form the outer corner portion of the narrow groove 13a into a curved shape protruding outward by performing flat pressing using the hot pressing plate.

[Brief description of drawings]

FIG. 1A is a sectional view showing an embodiment of a decorative plate according to the present invention, and FIG. 1B is a partial enlarged sectional view showing a narrow groove portion of the decorative plate of the same.

FIG. 2 is a process drawing showing a method for forming a narrow groove in the same decorative plate.

3 (a) and 3 (b) are process drawings showing a method for forming a fine groove in the same decorative plate.

4 (a) and 4 (b) are process drawings showing a method for forming a fine groove in the same decorative plate.

5 (a) and 5 (b) are cross-sectional views showing a process of forming a narrow groove in the same decorative plate.

FIG. 6 is a cross-sectional view showing a process of forming a narrow groove when the narrow groove is formed by another narrow groove forming method.

7A and 7B are cross-sectional views showing a general decorative board.

FIG. 8 is a schematic view showing a conventional method for forming a narrow groove.

[Explanation of symbols]

1 Veneer 11 Wood base material 12 Surface cosmetics 13, 13a, 13b Fine groove 20 hot rolls 21 Groove shaping protrusion 21a Shaped surface 30 polishing equipment 31 sanding belt 32 pulley 33 sanding pad

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 2B002 AA02 AA03 AA04 AA06 AB03                       AC02 BA09 BA15 BB05 BB10                       DA01                 3C049 AA05 CA01 CA08 CB01                 3C053 BB02 BB09 BC07 BE04                 3C058 AA05 CA01 CA08 CB01

Claims (3)

[Claims] 1. A step of forming a fine groove having a V-shaped cross section by cutting the surface of a decorative plate, and a groove forming in which the fine groove formed in the V-shaped cross section has a curved molding surface. A step of forming an outer corner portion of the narrow groove formed in a V-shaped cross section into a curved shape protruding outward by pressing with a hot pressing roll or a hot pressing plate having a convex portion for use; A method for forming a fine groove in a decorative plate, comprising a step of polishing the surface of the fine groove formed into a curved shape in which a portion protrudes outward to shape the groove into a predetermined groove shape. 2. The method for forming a narrow groove in a decorative plate according to claim 1, wherein the surface of the narrow groove, which is formed in a curved shape with its outer corner portion protruding outward, is polished by a cross sander. 3. A decorative plate having fine grooves formed on the surface thereof, wherein the fine grooves are formed by hot pressing the V groove formed by cutting the surface, so that both outer corners of the V groove are outwardly moved. A decorative plate, which is formed into a protruding curved shape, and is then shaped into a predetermined groove shape by polishing the groove surface.