JP2008006727A - Method for smoothing surface of wood fiber board bonded to substrate and veneer laminated decorative board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To manufacture a compound substrate 10 where the surface of a wood fiber board 2 is smoothed without being affected by irregularity of a plywood substrate 3 side. <P>SOLUTION: The cutting tool 20 having a blade body 23 is used and the cutting tool 20 is moved in parallel to the surface of the wood fiber board 2 in such a state that a pushing force to the plywood substrate 3 side is maintained so as not to be generated in the wood fiber board 2, and the surface of the wood fiber board 2 is cut off. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a method for smoothing the surface of a wood fiber board in a composite base material obtained by attaching a wood fiber board to the surface of the base material, and a veneered decorative board having the composite base material.

  A decorative board such as a flooring is known in which a plywood or the like is used as a base material, and a thin design veneer having a thickness of about 0.2 to 0.3 mm is bonded thereon. In the decorative board of this form, the unevenness on the surface of the base material may affect even the design veneer stuck thereon. For example, in the case of softwood plywood, the cause of unevenness on the surface of the base material is due to the difference in hardness of early and late wood often found in softwood, and due to nodes and joint holes. If the surface of the veneer is affected by the unevenness of the substrate surface, when the veneer surface is painted, inconveniences such as appearing in the surface color along the unevenness are likely to occur.

  In order to cope with this, a wooden decorative board is proposed in which a medium-sized fiberboard is sandwiched between a plywood base material and a surface decorative material (a veneer) (Patent Document 1). This wood decorative board has an advantage that an inexpensive material such as lauan or softwood can be used as a plywood material as a base material because the surface texture of the surface decorative material can depend on the medium fiberboard.

Japanese Utility Model Publication No. 5-96282

  In a decorative board in a form in which a surface decorative material is attached to a wood fiberboard side of a composite base material, which is described in Patent Document 1 and bonded to the surface of a base material, a surface decorative material is attached. As a pre-process, an operation of smoothing the surface of the wood fiber board to a level at which a surface decorative material can be applied is required. The present inventors have been greatly involved in the smoothing operation, but have experienced that unevenness may still remain on the surface of the wood fiber board after the smoothing operation.

  This invention is made | formed in view of the above situations, and after performing a smoothing operation | work with respect to the above-mentioned composite base material wood fiber board, so that an unevenness | corrugation may not remain on the said wood fiber board surface It is an object of the present invention to provide an improved surface smoothing method. Moreover, it aims at providing the decorative board which has the composite base material smooth | blunted in that way.

  The inventors of the present invention have obtained the following knowledge by conducting many experiments in order to know the reason why unevenness still remains on the surface of the wood fiber board after the smoothing operation. That is, as shown in FIG. 5, the conventional surface grinding is performed by applying a grinding iron roll or plastic roll 1 with sandpaper wrapped around the surface to a wood fiber board 2 as a work piece, as in a wide belt sander. Although it is performed in a state of being pressed from above with a force F, in this method, as shown in FIG. When the part 4 or the part 4 where the pressure is not applied uniformly exists, the part 4 becomes a refuge for the wood fiber board 2 as the work piece, so that the grinding amount is reduced as compared with the surroundings. As a result, as shown in FIG. Thus, it has been found that the unevenness 2a is restored and formed on the surface of the wood fiber board 2 after grinding, and consequently affects the surface properties of the veneer stuck on the surface.

  The present invention is based on the above findings, and is a method of smoothing the surface of the wood fiber board in a composite base material obtained by bonding a wood fiber board to the surface of the base material, comprising a blade as a tool. Holding the cutting tool so that the pressing force to the base material side does not occur on the wood fiber board, and moving the blade body in parallel to the surface of the wood fiber board, It is characterized by scraping off the surface.

  The present invention also discloses a veneered decorative board in which a veneer is adhered to the surface of a wood fiberboard of a composite substrate produced by the above surface smoothing method.

  In the surface smoothing method according to the present invention, since the pressing force to the base material side does not act on the wood fiber board for smoothing the surface, the defect site or the surface of the base material serving as the base of the work piece is removed. Even if there is a portion where the pressure is not evenly applied, the wood fiber board does not escape to the portion when the surface is scraped off. For this reason, the surface of the wood fiber board is maintained in a smooth state that is scraped off along the moving direction of the blade, and the unevenness is not restored after the smoothing operation.

  In the method of this invention, the form of the cutting tool provided with the blade body used for scraping off is arbitrary. For example, a blade having a plurality of blades in a horizontal plane perpendicular to the rotation axis, a blade having a plurality of blades on the peripheral surface of a rotating cylindrical body, and a blade having a thin plate shape, The thing of the form which only moves in parallel with a cutting surface is mentioned. Regardless of which cutting tool is used, the blade is moved in a direction parallel to the surface of the wood fiber board to scrape off the surface.

  In the method of the present invention, any base material constituting the composite base material to be cut can be used. Examples include a plywood material such as softwood plywood or lauan plywood, a single-plate laminated material, or an accumulated material. As the wood fiber board, a wood fiber board having a thickness of about 0.5 to 3 mm used in a conventional decorative board (floor material or the like) can be used as it is. For example, MDF (medium fiber board), HB ( Hard fiber board) and the like.

  By applying a surface decorative material such as a thin veneer having a thickness of about 0.2 to 0.3 mm to the surface of the wood fiberboard of the composite substrate whose surface has been smoothed by the method of the present invention, the flooring material or the decorative material The surface of the wood fiber board is a smooth surface that is not affected by the surface properties of the base material that is the base, and has no irregularities. There is no appearance of shading due to unevenness on the plate surface.

  By employing the surface smoothing method according to the present invention, a composite base material in which the surface of the wood fiber board is smoothed without being influenced by the base material side can be obtained. In addition, a veneered decorative board is obtained in which the shade due to the unevenness of the substrate surface of the composite substrate does not appear in the surface color.

  Hereinafter, the present invention will be described based on embodiments with reference to the drawings. FIG. 1 is a schematic diagram for explaining a surface smoothing method according to the present invention, FIG. 2 is a perspective view schematically showing an example of a cutting tool used in the method of the present invention, and FIGS. 3 and 4 are surfaces according to the present invention. It is a schematic diagram for demonstrating the other form of the smoothing method.

  In FIG. 1, reference numeral 10 denotes a composite base material, and in this example, includes an appropriate plywood base material 3 and MDF which is a wood fiber board 2 bonded to the surface thereof. The plywood base material 3 is a softwood plywood, and the surface layer 3a has a defect site 4 such as a missing node. The surface of the wood fiber board 2 bonded to the surface layer 3 a is smoothed using the cutting tool 20. In this example, the cutting tool 20 includes a rotating disk 21 that rotates about the rotation axis Y and a rotating shaft 22 that is perpendicular to the rotating disk 21, and an appropriate cutting blade 23 is formed on the lower surface of the rotating disk 21. Has been. Although not shown in the drawings, the cutting tool 20 is prevented from applying a weight to the work piece (here, the wood fiber board 2) during cutting by appropriate means such as providing a balance weight.

  When performing the surface smoothing process, the cutting tool 20 is installed such that the rotation axis Y thereof is perpendicular to the surface direction P in which the composite base material 10 is disposed. Then, either one or both of the composite base material 10 and the cutting tool 20 are moved in the direction of the rotational axis Y, and the blade body 23 of the cutting tool 20 is positioned (level alignment) with respect to the wood fiber board 2. In this state, the rotating disk 21 is rotated, and the cutting tool 20 is moved in a direction parallel to the wood fiber board 2, that is, a surface direction P in which the composite base material 10 is disposed. Thereby, as shown in FIG. 1a, the scraping work of the surface of the wood fiber board 2 is started, and the surface of the wood fiber board 2 after the scraping work becomes a smooth surface. When scraping off, the cutting tool 20 may be fixed and the composite base material 10 may be moved in the surface direction P, or both may be moved in the surface direction P.

  As described above, even when the surface layer 3a of the plywood base material 3 has a defect part 4 such as a knot, a pressing force of the cutting tool 20 toward the plywood base material 3 does not act on the wood fiber board 2. Therefore, unlike the conventional case, the wood fiber board 2 does not escape into the defect site 4, and the surface of the wood fiber board 2 after scraping is flat when scraped off, as shown in FIG. 1b. It is maintained as it is.

  In the cutting tool 20 described above, the shape of the cutting blade body 23 provided on the lower surface of the rotary disk 21 is arbitrary and is not limited, but preferably a plurality of cutting blade bodies 23 extending radially from the center as shown in FIG. In this case, it is possible to further improve the smoothness after scraping by making the blade portion inclined toward the rear in the rotational direction.

  FIG. 3 schematically shows another embodiment of the surface smoothing method according to the present invention. Here, as the cutting tool 20 </ b> A, the rotation axis X has a rotating cylindrical body 24 in a direction parallel to the surface direction P in which the composite base material 10 is disposed, and a cutting blade is provided on the peripheral surface of the rotating cylindrical body 24. The thing in which the body 23 is formed is used. Also in this case, the cutting tool 20A does not apply the load of the cutting tool 20 to the work piece (here, the wood fiber board 2) at the time of cutting by an appropriate means such as providing the balance weight of the cutting tool 20 or the like. Has been.

  Even when this cutting tool 20A is used, after positioning (leveling) the blade body 23 of the cutting tool 20A with respect to the wood fiber board 2, the rotation cylinder body 24 is rotated, and the rotation cylinder body 24 is rotated. By moving X in a direction parallel to the surface direction P on which the composite base material 10 is arranged, the surface scraping work of the wood fiber board 2 proceeds as shown in FIG. The surface of 2 becomes a smooth surface.

  FIG. 4 schematically shows still another embodiment of the surface smoothing method according to the present invention. Here, as the cutting tool 20B, a thin plate-like blade 25 having a cutting blade body 23 at the tip is used. As shown in FIG. 4, the blade 25 is set in a posture parallel to the surface direction P in which the composite base material 10 is arranged, and after positioning the blade 25 with respect to the wood fiber board 2 (level adjustment), the blade 25 is moved. It moves in the surface direction P toward the composite substrate 10 or moves the composite substrate 10 in the surface direction P toward the blade 25. Thereby, the surface of the wood fiber board 2 is scraped off and smoothed by the cutting blade body 23. Even in this case, the pressing force of the cutting tool 20B (the blade 25) to the composite base material 10 side does not act on the wood fiber board 2, so that the surface layer 3a of the plywood base material 3 is applied to the surface of the plywood base material 3 as in the case of the other embodiments described above. Even when a defect part 4 such as a missing part is present, the wood fiber board 2 does not escape into the defect part 4, and the surface of the wood fiber board 2 after scraping is flat when scraped off. Is maintained as it is.

  Although not shown, a thin veneer having a thickness of about 0.2 to 0.3 mm is pasted on the wood fiber board 2 whose surface of the composite base material 10 has been smoothed as described above by a conventional method. As a result, it becomes a veneered decorative board. Since the surface of the wood fiber board is a smooth surface, this decorative board is effective as a flooring or the like because the surface color does not appear as a result of surface irregularities of the wood fiber board 2 as in the past. Can be used.

FIG. 1A is a schematic diagram for explaining a surface smoothing method according to the present invention, FIG. 1A shows a state in the middle of processing, and FIG. 1B shows a state after smoothing processing. The perspective view which shows typically an example of the cutting tool used with the method of this invention. The schematic diagram for demonstrating the other form of the surface smoothing method by this invention. The schematic diagram for demonstrating the further another form of the surface smoothing method by this invention. FIG. 5A is a schematic diagram for explaining a surface smoothing method according to a conventional method, FIG. 5A shows a state during the processing, and FIG. 5B shows a state after the smoothing processing.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Composite base material, 2 ... Wood fiber board (MDF), 3 ... Plywood base material, 3a ... Surface layer of plywood base material, 4 ... Defect site | part, 20, 20A, 20B ... Cutting tool, 21 ... Rotary disk, 22 ... Rotating shaft, 23: Cutting blade, 24: Rotating cylindrical body, 25: Thin blade, X: Rotating axis, Y: Rotating axis, P: Surface direction in which composite substrate is arranged

Claims (2)

  A method of smoothing the surface of a wood fiber board in a composite base material obtained by bonding a wood fiber board to the surface of a base material, wherein a cutting tool having a blade is used as a tool, and the cutting tool is used as a base material A surface characterized in that the pressing force to the side is not generated in the wood fiber board, and the blade is moved in parallel to the surface of the wood fiber board to scrape off the surface of the wood fiber board Smoothing method.   A veneer-attached decorative board in which a veneer is attached to the surface of a wood fiberboard of a composite substrate produced by the surface smoothing method according to claim 1.

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