Method of producing artificial veneer

Abstract

To provide a method of producing a dyed artificial veneer without using a large scale installation.SOLUTION: A method of producing an artificial veneer includes: a veneer-making process of cutting a plurality of respective veneers (1a, 2a, 3a, 4a) out from a plurality of woods (1, 2, 3, 4); a laminate material-making process of laminating a plurality of the veneers (1a, 2a, 3a, 4a) so as not to adjoin the veneers (1a, 2a, 3a, 4a) cut out from the same wood (1, 2, 3, 4) each other, and press-bonding laminated veneers (1a, 2a, 3a, 4a) in a laminating direction to make a laminate material B; a slice process of slicing the laminate material B parallel in a laminating direction to make a wood thin plate A'; and a coloring process of coloring the wood thin plate A'.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] This relates to a method for manufacturing artificial veneer. [Background technology]

[0002] Patent Document 1 discloses a method for producing an artificial veneer by producing a flitch by laminating dyed wood veneers and slicing the flitch in a direction intersecting the lamination plane. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-226913 Summary of the Invention [Problem to be solved by the invention]

[0004] In the method of manufacturing artificial veneer described in Patent Document 1, first, a number of wood veneers with a dye applied to one surface are prepared, and two sheets are stacked together so that the dye-coated surfaces are in contact with each other to form a set. Multiple sets of two wood veneers are stacked in the thickness direction, and a press repeatedly presses and releases the pressure to allow the dye components to penetrate into the wood veneer, thereby dyeing the wood veneer. A flitch is produced by stacking and gluing a number of dyed wood veneers in the thickness direction, and the flitch is then sliced ​​in a direction intersecting the stacking plane to produce the artificial veneer.

[0005] According to this manufacturing method, when manufacturing a decorative veneer dyed with a dye, it is necessary to repeatedly press and release the pressure to allow the dye to penetrate into the interior of the wood veneer. For this reason, conventional manufacturing methods require large-scale equipment such as a press machine to dye the wood veneer.

[0006] Therefore, an object of the present invention is to make it possible to easily manufacture artificial veneer without using large-scale equipment. [Means for solving the problem]

[0007] In order to achieve the above object, in this invention, instead of coloring a thick wood veneer, a laminated material made of uncolored sawn boards is sliced ​​to produce a thin wood flake.

[0008] Specifically, the first invention is based on a method for producing artificial veneer.

[0009] The first invention is characterized by including a sawn board production process in which a plurality of planks are cut from each of a plurality of pieces of wood; a laminated material production process in which the plurality of planks are stacked so that planks cut from the same piece of wood are not adjacent to each other and the stacked planks are pressed and bonded in the stacking direction to produce a laminated material; a slicing process in which the laminated material is sliced ​​parallel to the stacking direction to produce thin wood pieces; and a coloring process in which the thin wood pieces are colored.

[0010] In the first invention, a laminated material is produced by stacking and pressing a plurality of sawn boards cut from a plurality of pieces of wood together, and then slicing the laminated material parallel to the end grain to obtain thin wood flakes, which are then colored. Thin wood flakes are extremely thin compared to sawn boards and laminated materials. For this reason, thin wood flakes absorb coloring agents more easily than sawn boards and laminated materials, and can be colored more easily than sawn boards and laminated materials. Therefore, according to the first invention, artificial veneer can be easily produced without using large-scale equipment such as a press machine.

[0011] The second invention is characterized in that, in the first invention, in the coloring process, a dyeing solution containing a colorant is applied to the wood flakes or the wood flakes are immersed in the dyeing solution to impregnate the wood flakes with the colorant.

[0012] In the second invention, the colorant can be impregnated into the wood flakes (the wood flakes can be colored) by the simple method of applying a dye solution to the wood flakes or immersing the wood flakes in a dye solution. Effect of the Invention

[0013] According to the present invention, instead of coloring a thick wood veneer, a laminated material made by laminating uncolored sawn boards is sliced ​​to produce thin wood pieces, which are then colored, so that an artificial veneer can be easily manufactured without using large-scale equipment. [Brief description of the drawings]

[0014] [Figure 1] 1A and 1B are diagrams showing an artificial veneer and wood flakes according to an embodiment. [Diagram 2] FIG. 1 is a diagram showing a wooden board according to an embodiment. [Diagram 3] FIG. [Figure 4] FIG. 1 is a diagram showing a laminated wood material according to an embodiment. [Diagram 5] 4A to 4C are diagrams showing a process of slicing a laminated wood material according to an embodiment. [Figure 6] 3 is a flowchart showing a method for manufacturing an artificial veneer according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the drawings. The following description of the preferred embodiments is merely illustrative in nature and is not intended to limit the present invention, its application, or its uses.

[0016] -Composition of artificial veneer- FIG. 1 shows an artificial veneer A according to an embodiment of the present invention. The artificial veneer A is used, for example, for surface decoration of household appliances, furniture, and building interior materials. The artificial veneer A is a colored wood flake A' having a thickness of 0.3 mm. Details will be described later, but the wood flake A' is obtained by slicing parallel to the lamination direction of a laminated wood material B, which is made by laminating and pressing and bonding multiple types (four types in this embodiment) of first to fourth sawn boards 1a to 4a cut from multiple (four in this embodiment) wood pieces 1 to 4.

[0017] The artificial veneer A is formed of a plurality of wooden pieces 1b-4b arranged in a predetermined direction. The plurality of wooden pieces 1b-4b are bonded to adjacent wooden pieces 1b-4b with an adhesive. In this embodiment, each of the wooden pieces 1b-4b is formed in a rectangular shape. The plurality of wooden pieces 1b-4b are formed of a plurality of types (four types in this embodiment) of wooden pieces (first to fourth wooden pieces 1b-4b).

[0018] The first to fourth wooden pieces 1b to 4b are sliced ​​from the first to fourth sawn boards 1a to 4a of the laminated wood material B. As described above, the first to fourth sawn boards 1a to 4a are cut from a plurality of pieces of wood 1 to 4, respectively, so the first to fourth wooden pieces 1b to 4b are different in color. In the artificial veneer A, the rectangular first wooden piece 1b, second wooden piece 2b, third wooden piece 3b, and fourth wooden piece 4b are arranged so that the same first to fourth wooden pieces 1b to 4b are not adjacent to each other, thereby expressing a straight grain pattern on the surface.

[0019] As described above, the artificial veneer A is obtained by coloring the wood pieces A' with a dye solution, and the first to fourth wood piece portions 1b to 4b contain a coloring agent.

[0020] Since the first to fourth sawn boards 1a to 4a are cut from the first to fourth wooden pieces 1 to 4, respectively, the first to fourth wooden pieces 1b to 4b have different specific gravities. Wooden pieces made from wooden pieces with a higher specific gravity are darker in color (lower in brightness) than wooden pieces made from wooden pieces with a lower specific gravity. Wooden pieces made from wooden pieces with a higher specific gravity absorb less dyeing liquid than wooden pieces made from wooden pieces with a lower specific gravity. For this reason, wooden pieces with a darker color (lower in brightness) absorb less dyeing liquid than wooden pieces with a lighter color (higher in brightness).

[0021] In the artificial veneer A, among the first to fourth wooden pieces 1b to 4b, those with a low specific gravity and a light color absorb more dyeing liquid. Taking advantage of this, in this embodiment, the wooden piece A' is colored with dyeing liquid containing a colorant whose color is close to the color (hue) of the first to fourth wooden pieces 1b to 4b and whose brightness is between the highest and lowest brightness of the first to fourth wooden pieces 1b to 4b. Therefore, the color difference (brightness difference) of the first to fourth wooden pieces 1b to 4b is reduced. Therefore, the artificial veneer A has a natural-looking straight grain pattern on the surface.

[0022] -Manufacturing method of artificial veneer- As shown in FIG. 6, the method for producing the artificial veneer A according to this embodiment includes a sawing step S1, a sawn board preparation step S2, a laminated material preparation step S3, a slicing step S4, and a coloring step S5.

[0023] (Lumber processing) In the sawing process S1, a plurality of (four in this embodiment) wooden pieces 1-4 sawn to the same dimensions are prepared (see FIG. 1). The first to fourth wooden pieces 1-4 may be cut from different parts of the same log, may be cut from different logs of the same species, or may be cut from logs of different species. In any case, the first to fourth wooden pieces 1-4 include early wood and late wood, and each has a different color and specific gravity.

[0024] There is no limitation on the species of the raw wood for the first to fourth wooden pieces 1 to 4. For example, soft species such as cedar, hemlock, cypress, and Japanese walnut, and hard species such as oak, birch, beech, and cherry can be used. Any species, such as coniferous or broad-leaved trees, can be used for the first to fourth wooden pieces 1 to 4.

[0025] (Sawn board manufacturing process) In the plank manufacturing process S2, the first to fourth wooden pieces 1 to 4 are sawn to manufacture the first to fourth planks 1a to 4a having a predetermined thickness (1 to 3 mm) (see FIG. 2). In this example, the thickness of the first to fourth planks 1a to 4a is set to 2 mm.

[0026] (Laminated material manufacturing process) In the laminated material preparation step S3, first, a plurality of first to fourth sawn boards 1a to 4a are laminated and bonded in a regular or random order in the thickness direction (see FIG. 3). At this time, the first to fourth sawn boards 1a to 4a cut from the same wooden pieces 1 to 4 are laminated so that they are not adjacent to each other. Before carrying out the laminated material preparation step S3, the moisture content of the first to fourth sawn boards 1a to 4a is adjusted to 30% to 50%.

[0027] In this example, multiple first to fourth planks 1a to 4a are stacked regularly from bottom to top in the order of first plank 1a, second plank 2a, third plank 3a, and fourth plank 4a, and two planks that contact each other above and below are glued together. The first to fourth planks 1a to 4a are stacked with their fiber directions (direction along the grain of the wood) aligned. This stacking and gluing process is repeated until the first to fourth planks 1a to 4a are stacked and glued together to a height of about 200 mm.

[0028] The adhesive for bonding the first to fourth sawn boards 1a to 4a may be, for example, a thermoplastic resin such as an acrylic resin, a vinyl acetate resin, a urethane resin, or a modified resin thereof; a thermosetting resin such as a urea melamine resin, an epoxy resin, a phenolic resin, or an isocyanate resin; or a resin adhesive obtained by dissolving a mixture of a thermoplastic resin and a thermosetting resin in a solvent.

[0029] The adhesive for bonding the first to fourth sawn boards 1a to 4a is preferably a colorless and transparent one, but by using an adhesive containing a phenolic resin or a colorant, the contact surfaces of the stacked first to fourth sawn boards 1a to 4a may be colored in a desired color.

[0030] The first to fourth planks 1a to 4a are stacked and bonded together until the height is about 200 mm, and then the stacked and bonded first to fourth planks 1a to 4a are pressed in the stacking direction to produce the laminated wood material B. In this example, the laminated wood material B is pressed using a flat plate press. Pressing the laminated wood material B using a flat plate press makes the contact surfaces of the first to fourth planks 1a to 4a flat. In this example, the laminated wood material B is pressed until the height (thickness) is about 45 to 50 mm.

[0031] (Slicing process) In the slicing step S4, the laminated wood material B is sliced ​​to produce thin wood pieces A' (see FIG. 5). Specifically, the laminated wood material B is sliced ​​by a slicer 5 in parallel to the butt end surface (the end surface of the laminated wood material B in the left-right direction in FIG. 5) along the fiber direction (direction along the grain) of each of the first to fourth sawn boards 1a to 4a to produce thin wood pieces A'. Since the laminated wood material B is sliced ​​along the fiber direction, the grain of the first to fourth sawn boards 1a to 4a is not easily seen on the surface of the thin wood piece A' (surfaces of the first to fourth wood pieces 1b to 4b). In this example, the laminated wood material B is sliced ​​in widths of 0.3 mm to produce thin wood pieces A' with a thickness of 0.3 mm.

[0032] In the laminated wood material B, the first to fourth planks 1a to 4a are flat, so that the first to fourth wood piece portions 1b to 4b of the thin wood piece A' sliced ​​from the laminated wood material B are formed into a rectangular shape with linear contact points, thereby forming a straight grain pattern on the surface of the thin wood piece A'.

[0033] (Coloring process) In the coloring step S5, the wood flakes A' are colored to produce the artificial veneer A. Specifically, the wood flakes A' are colored using a dyeing solution containing a colorant. In this embodiment, the wood flakes A' are colored by applying the dyeing solution to the wood flakes A' using, for example, a spray or a sponge roll coater. The applied dyeing solution permeates the interior of the wood flakes A'. Since the wood flakes A' are thin, with a thickness of 0.3 mm, the dyeing solution permeates evenly into the interior of the wood flakes A'. Therefore, the coloring agent can be impregnated into the entire wood flakes A'.

[0034] Any colorant may be used in the dye solution, but for example, when it is desired to express the grain of walnut or white oak, a colorant close to the color (hue) of the wood to be expressed is used. In this way, the wood flakes A' are colored in a color close to the color of walnut or white oak, and a walnut-like or white oak-like artificial veneer A can be produced.

[0035] As described above, in this embodiment, the first to fourth wooden pieces 1b to 4b that have a low specific gravity and a light color absorb more dyeing liquid, and the wood slice A' is colored with a dyeing liquid containing a colorant whose color is close to the color (hue) of the first to fourth wooden pieces 1b to 4b and whose brightness is between the highest and lowest brightness of the first to fourth wooden pieces 1b to 4b. Therefore, the first to fourth wooden pieces 1b to 4b of the wood slice A' that have a low specific gravity and a light color absorb more dyeing liquid, and the color difference (brightness difference) of the first to fourth wooden pieces 1b to 4b becomes smaller. As a result, the artificial veneer A is manufactured in which the first to fourth wooden pieces 1b to 4b form a natural-looking straight grain pattern on the surface.

[0036] -Effects of the embodiment- As explained above, according to the manufacturing method of the present artificial veneer A, a laminated wood material B is manufactured, and then a thin wood piece A' is manufactured from the laminated wood material, and the thin wood piece A' is then colored with a dye. Therefore, when manufacturing an artificial veneer A of a desired color, it is not necessary to repeatedly press and release the wood veneer with a press machine after stacking a large number of wood veneers as in Patent Document 1, to allow the dye to penetrate into the wood veneer. Therefore, according to the manufacturing method, a colored artificial veneer A can be easily manufactured without using large-scale equipment such as a press machine for coloring.

[0037] In addition, for example, when a dye solution is applied to a sawn board with a thickness of 2 mm, the dye solution may not penetrate into the inside of the sawn board. This may cause uneven coloring inside the sawn board. If an artificial veneer is manufactured using a sawn board with uneven coloring, the artificial veneer may have uneven coloring.

[0038] In contrast, in the above manufacturing method, the first to fourth planks 1a to 4a or the laminated wood material B are not colored, but the wood flakes A' obtained by slicing the laminated wood material B are colored. The wood flakes A' are extremely thin compared to the first to fourth planks 1a to 4a or the laminated wood material B. Therefore, the wood flakes A' absorb the coloring agent more easily than the first to fourth planks 1a to 4a or the laminated wood material B, and can be colored more easily than the first to fourth planks 1a to 4a or the laminated wood material B. Therefore, in the above manufacturing method, the wood flakes A' are impregnated with the coloring agent (the wood flakes A' are colored) by a simple method of applying a dye solution containing the coloring agent to the wood flakes A' using a spray, a sponge roll coater, or the like. Therefore, according to the above manufacturing method, it is possible to manufacture artificial veneer A without color unevenness even when dyeing using a simple method without using large-scale equipment such as a press machine for coloring.

[0039] In addition, in the above manufacturing method, the grain of the first to fourth sawn boards 1a to 4a is unlikely to appear on the surface of the wood slice A'. The grain of the sawn board is formed by alternating early wood and late wood. Early wood has a low density and is easily impregnated with a coloring agent, while late wood has a high density and is difficult to impregnate with a coloring agent. Therefore, since the grain of the sawn board does not appear on the surface of the wood slice A', unevenness in the amount of impregnation of the coloring agent on the surface of the wood slice A' is reduced. Therefore, even if the wood slice A' is dyed by a simple method, an artificial veneer A without color unevenness can be manufactured.

[0040] (Other embodiments) In the above embodiment, pressing is performed by a flat plate press, but a curved jig or embossed plate may be used. In this case, the contact surfaces of the first to fourth sawn boards 1a to 4a are curved to match the shape of the curved jig or embossed plate. This results in a laminated wood material B in which the contact surfaces of the first to fourth sawn boards 1a to 4a are curved. The thin wood piece A' obtained by slicing this laminated wood material B has curved contact points between the first to fourth wood pieces 1b to 4b. Therefore, the surface of the thin wood piece A' has a natural wood grain pattern rather than a straight grain pattern.

[0041] In the above embodiment, the wooden flakes A' are dyed to produce the artificial veneer A, but the wooden flakes A' may be dyed and painted.

[0042] In the above embodiment, the coloring agent is impregnated into the wood flakes A' by applying the dyeing liquid with a spray or a sponge roll coater, but the method of impregnating the wood flakes A' with the coloring agent is not limited to this. The coloring agent may be impregnated into the wood flakes A' by immersing the wood flakes A' in the dyeing liquid (dipping).

[0043] In the above embodiment, the laminated wood material B is sliced ​​to a width of 0.3 mm to form the 0.3 mm thin wood pieces A', but this is not limited to this. The thin wood pieces A' may be sliced ​​thinner than the first to fourth planks 1a to 4a.

[0044] In the above embodiment, four types of sawn boards 1a-4a are produced using four pieces of wood 1-4, but the number of pieces of wood used is not limited to this. It is sufficient to be able to produce two or more types of sawn boards. In short, it is sufficient to use a plurality of pieces of wood so that sawn boards of different colors are laminated when producing the laminated wood material B. In addition, the order in which the sawn boards are laminated when producing the laminated wood material B is not limited to the order in the above embodiment, and any order may be used as long as the sawn boards 1a-4a cut from the same pieces of wood 1-4 are not adjacent to each other, and it does not have to be a regular order.

[0045] In addition, by applying a pattern to the artificial veneer A after coloring using a printing method such as inkjet printing, it is possible to obtain an artificial veneer that imitates a so-called fine wood veneer or an artificial veneer having a distinctive pattern (geometric or abstract pattern). [Industrial Applicability]

[0046] INDUSTRIAL APPLICABILITY The present invention has a high industrial applicability because it is possible to obtain an artificial veneer A expressing a natural wood grain texture without using large-scale facilities for dyeing. [Explanation of symbols]

[0047] A. Artificial veneer A´ Wood flakes 1,2,3,4 wood 1a,2a,3a,4a sawn board B Wood laminate

Claims

1. A method for producing artificial veneer, comprising: a sawn board production process for cutting a plurality of sawn boards from each of a plurality of pieces of wood; A laminated material production process in which a plurality of the sawn boards are stacked such that the sawn boards cut from the same wood are not adjacent to each other, and the stacked sawn boards are pressed and bonded in a stacking direction to produce a laminated material; A slicing step of producing wood slices by slicing the laminated material parallel to the lamination direction; A coloring step of coloring the wood flakes. A method for producing artificial veneer.

2. The method for producing an artificial veneer according to claim 1, In the coloring step, a dye solution containing a colorant is applied to the wood flakes, or the wood flakes are immersed in the dye solution, thereby impregnating the wood flakes with the colorant. A method for producing artificial veneer.

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