JPS634482B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for manufacturing a decorative board material using a thin coniferous veneer as a decorative surface.

(Prior art and its problems) In general, thin coniferous veneers are used for spring wood, autumn wood,
The fiber structure of spring wood is arranged relatively densely, and the difference in shading between the two is also small, making the wood grain pattern unclear, but even though it is a needle-leaved species, it is similar to pine wood. From some parts of the spring wood, the autumn wood has a high resin content and clear grain, while the spring wood is relatively loose.
It is possible to cut a veneer of a precious wood called ``Himatsu'' which is arranged in autumn wood.

However, since the pine trees from which this kind of pine tree suitable for decorative board material can be harvested are, of course, limited to long-lived pines, it is becoming difficult to obtain them. Since the yield rate for obtaining thin veneer with the desired grain pattern from a single pine tree is only about 2%, decorative veneer materials using pine wood are produced in small quantities and at high prices, which is sufficient to meet the demand. A problem has arisen that cannot be resolved.

(Purpose of the Invention) In view of the above circumstances, the present invention aims to produce a decorative board material exhibiting a wood grain pattern similar to that of "Himatsu" at a low cost by using a thin veneer of hemlock or Japanese pine, which are relatively easily available coniferous trees. The purpose of the present invention is to provide a method for manufacturing decorative board materials that can be obtained in the following manner.

(Structure of the Invention) The method for manufacturing a decorative board material according to the present invention is a thin veneer of hemlock or Japanese pine that has been cut and formed so that the spring wood to fall wood portions have an inclination angle of 45 degrees or less, preferably 30 degrees, at the end face of the wood. is pasted on a substrate such as plywood, and the surface is brush-ground to remove the soft spring wood part of the fibrous structure. The surface of the thin veneer is coated smoothly with a colored paint containing pigment components with a concentration difference of 100 to 100 cm, and by inverting and emphasizing the difference in shading between spring wood and autumn wood, a wide and clear wood grain pattern is created. It is formed on the surface.

In other words, by performing diagonal cutting, both the width of the spring wood and the width of the fall wood originally possessed by the source wood species, hemlock or Japanese pine, are expanded to the desired width, resulting in a relatively loose arrangement of spring wood and fall wood. , by removing the soft spring wood part of the fiber structure and inverting and emphasizing the difference in shading between spring wood and autumn wood using colored paint, we created a decorative surface that resembles that of a thin veneer of so-called ``Hishimatsu''. This is to form a decorative board material having.

(Embodiment of the invention) The decorative board material shown in the first diagram is a thin veneer 2 on a substrate 1 as appropriate.
A coating film 3 is formed by applying a colored paint to the surface of the coating.

As the substrate 1, plywood, fiberboard, metal plate, etc. of a predetermined size are used.

Further, as the thin veneer 2, hemlock or Japanese pine is thinly cut using a slicer. As shown in the second diagram, this thin veneer 2 is cut diagonally so that the spring wood portion a and the fall wood portion b are inclined at an angle θ of 45 degrees or less, preferably 30 degrees when viewed from the butt end side. As a result, a spring wood portion a having a surface area of width x and an autumn wood portion b having a surface area of width y appear on the surface. That is,
The original spring wood width of the original tree species, hemlock or Japanese pine, x'
The width of the wood grain is wider than the width of the autumn wood y', and it approximates the width of the grain of so-called ``Hishimatsu.''

This thin veneer 2 is subjected to a cutting process by passing the surface side of the thin veneer 2 into contact with the underside of a wire brush rotating at high speed. At this time, the bristles of the wire brush are brought into contact with the surface of the thin veneer 2 substantially perpendicularly. By this cutting, the thin veneer 2 has an uneven surface in which the autumn wood portion b, which has a dense fiber structure and is hard, protrudes, and the spring wood portion a, which has a coarse fiber structure and is hard, is depressed. Further, since the autumn material portion b is inclined, the groove c formed in the spring material portion a has a delta-like shape on the side end surface which gradually becomes deeper along the slope.

A coating film 3 is formed on this uneven surface with colored paint d so as to form a smooth surface.

The colored paint d is made by adding a pigment of a desired color to a resin such as epoxy, polyester, DAP, or vinyl chloride. This pigment is formulated according to the color of the autumn wood of so-called "hipine", and the amount of pigment added is determined based on the color of the autumn wood of the original tree species, hemlock or Japanese pine, to achieve the desired shade difference. It is determined based on the pigment concentration required to obtain the pigment, and is usually 2 to 4% by weight. Further, as the coating means, a roll coater, a flow coater, etc. are used.

Due to the formation of this coating film 3, the spring wood portion a where the colored paint d is applied with a large thickness and the autumn wood area b where the coating thickness is small.
At the same time, the shading difference between the two becomes larger than that of the original tree species, hemlock or Japanese pine, and approaches the shading difference of the so-called "hipine".

In other words, through the above-mentioned wood grain width expansion process using diagonal wood removal and this shading difference inversion emphasis process, a decorative surface is created that expresses a wood grain pattern similar to so-called "Hitsuga", which is completely different from that of the original tree species, hemlock or Japanese pine tree itself. It is something that is formed.

The coating film 3 gradually becomes thicker toward the right in FIG. 2 because one side of the groove c is inclined at a location corresponding to the groove c. Therefore, this part exhibits a deep decorative surface that gradually changes from a light color to a dark color, and together with the coating film of the autumn wood portion b, it is expressed as a decorative surface that approximates natural wood.

Further, in forming the coating film 3, it is preferable to apply a coating material using a flow coater, a roll coater, etc., and then apply a heat pressing process using a hot press, etc. By capping and heating and pressing, the paint can penetrate and adhere to small scratches caused by brush grinding, and by pressing the paint to the fluffy surface after grinding, it can be tightly adhered. This is because it is possible to prevent the occurrence of paint film peeling and to form the paint film 3 as an extremely dense and hard film.

(Effects of the Invention) According to the method for manufacturing decorative board materials according to the present invention, a decorative surface using a thin veneer of hemlock or Japanese pine has a wood grain pattern similar to that made using a thin veneer of so-called "hipine". It is possible to manufacture decorative board materials having the following properties at low cost and in large quantities.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a decorative board material manufactured by the method for manufacturing a decorative board material according to the present invention, and FIG. 2 is a partially enlarged side end view of the decorative board material. 1... Substrate, 2... Thin veneer, 3... Paint film, a...
...Spring wood part, b...Autumn wood part, d...Colored paint.

Claims (1)

[Claims] 1 A thin veneer of hemlock or Japanese pine that has been cut and formed so that the spring wood to fall wood portion has an inclination angle of 45 degrees or less, preferably 30 degrees at the end surface of the wood, is pasted on a substrate such as plywood, and a brush is applied to the surface. After removing the soft springwood part of the fiber structure by grinding, a thin layer is applied with a colored paint containing a pigment component that has a desired concentration difference compared to the color of the autumnwood part of the thin veneer of hemlock or Japanese pine. A method for manufacturing a decorative board material, characterized by forming a wide and clear wood grain pattern on the decorative surface by coating the board surface smoothly and performing inversion emphasis processing of the difference in shading between spring wood and autumn wood. .