JPH03234326A - Manufacture of artificial lumber - Google Patents

Abstract

PURPOSE:To easily form the artificial lumber of desired length by supplying a metallic pipe between plural pieces of rollers on which many projections are provided projectingly and forming a rugged pattern on the surface, thereafter, coloring it in a wooden skin color. CONSTITUTION:In the lower part, two pieces of rollers 1, 2 are arranged and in the upper part between both the rollers 1, 2, one piece of roller 3 is arranged. On the surface of each roller 1-3, many projections 11, 21 and 31 for forming a wooden skin-like rugged pattern are provided projectingly and discontinuously. Between the rollers 1-2, and 3, a metallic pipe such as a steel pipe or an aluminum pipe is allowed to pass through, and on the surface of the pipe 4, a wooden skin-like rugged pattern 41 is formed. This surface is painted in a wooden skin color, and target artificial lumber is obtained. Since many rugged patterns 41 are formed in a discontinuous state on the surface of the pipe 4, the adhesive property of paints is satisfactory, a coating film is scarcely peeled off, and the durability is improved. The obtained artificial lumber is used for a shelf and machine parts, etc.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to the manufacture of pseudo-wood used for component parts of sidewalk fences installed along sidewalks, fences installed in parks, displays, etc. It is about the method.

[Conventional technology]

Conventionally, sidewalk fences installed along sidewalks are generally constructed using supports, horizontal pipes, or rail materials made of steel pipes or steel plates whose surfaces are painted white or the like. Such sidewalk fences do not match the surrounding environment, especially when installed in mountainous areas, and are not desirable in terms of environmental conservation.

In addition, as fences installed in parks etc., for example,
No. 8-47158 (prior art ■) and No. 60-9
A fake wooden fence shown in Publication No. 341 (Prior Art ■) is known. The fake wood used in this fake wood fence all uses a steel plate or steel pipe as the core material, a coating layer made of plastic etc. is provided on the surface, and the surface of the coating scraps has an uneven pattern similar to wood skin. be.

Furthermore, as shown in Japanese Utility Model Application Publication No. 58-67018 (Prior Art 3), there is also known a fake tree in which a pattern resembling that of wood is formed on the surface of weather-resistant steel.

[#Problems to be Solved by Ming] In the pseudo wood disclosed in the above-mentioned prior art (■), the surface of the core material remains straight and the coating debris is formed on the surface, so that the coating layer easily peels off. Further, in order to form a wood skin-like uneven pattern on the surface of the coating waste, it is necessary to form the coating waste considerably thickly.

In order to form such a thick coating layer and uneven pattern, a mold is required, and the molding equipment becomes large and equipment costs are extremely high, and the length of the simulated wood is inevitably limited. Put it away. Further, due to the difference in coefficient of thermal expansion between the core material and the coating layer, cracks are likely to occur in the coating waste, resulting in poor durability.

The artificial wood of conventional technology ■ is made of weather-resistant steel, and the color change due to oxidation of the material itself produces the wood skin color, but it is difficult to produce the natural color of the wood skin using only such oxidation color. Yes, it has low commercial value. Further, there are problems such as the color tone changes as oxidation progresses and the strength of the material itself gradually decreases.

This technology was developed in order to solve these problems, and it is possible to easily form a desired length using a small amount of equipment, reduce equipment costs, and improve mass production. To provide a method for producing simulated wood that can significantly reduce costs, has excellent durability, and has high commercial value.

[Means to solve the problem]

The present invention provides a metal tube between a plurality of rollers each having a large number of protrusions discontinuously protruding from the surface for forming a wood texture pattern, and also drives the rollers so that the protrusions form a metal tube. After forming a wood texture pattern on the surface of the pipe,
This method is characterized in that the surface of a metal tube is colored to resemble wood to produce pseudo-wood.

[For production]

By the above method, it is possible to easily produce pseudo-wood that exhibits a wood texture pattern and a natural wood texture using a simple device.

〔Example〕

The construction drawing and the figure 2 show the manufacturing process of fake wood.
In the figure, two rollers 12 are arranged at the bottom, and one roller 3 is arranged at the upper part between both rollers 1 and 2. Each of the rollers 1 to 3 has a concave-shaped cross section, and a large number of protrusions 11, 21, and 31 for forming a wood texture pattern are discontinuously protruded from the surface thereof.

Note that the lower rollers 1 and 2 are connected to the shaft 1 with respect to a stand (not shown).
2. The upper roller 3 is provided to rotate at a fixed position via a shaft 32 and a movable bearing (not shown), and the upper roller 3 is provided to be rotatable and change its position in the vertical direction with respect to the mount. It is being Further, a plurality of idle rollers are provided at predetermined intervals in the feeding direction of the tube 4 as required.

This device generally uses an existing steel pipe rolling or shaping device, and the above-mentioned projections 11.21° 31 are formed on the surface of each roller 1, 2.3 of the device by, for example, welding.
to protrude. In this way, existing equipment only needs to be slightly improved, and equipment costs can be reduced.

For the above device, the upper roller 3 and the lower roller 1.2
The protrusions 11, 21 .
'31, the surface of the tube 4 has a large number of wood grain-like uneven patterns 4.
form 1.

゛According to this method, the wood texture pattern 41 can be easily formed on the surface of the tube 4 by simply passing it between the rollers 1, 2, and 3, and even a long tube 4 can be continuously formed. .

Note that any one or all of the rollers 1, 2.3 may be rotationally driven.

Next, by painting the surface of the tube 4 having the above-mentioned wood texture pattern 41 in a wood texture color (mainly brown), the desired pseudo-wood 5 is obtained (see FIG. 3). 42 is a coating film. During this painting, a large number of discontinuous wood grain-like uneven patterns 41 are directly formed on the surface of the tube 4, so the paint has good adhesion, the paint film 42 is difficult to peel off, and durability is improved. Therefore, it is sufficient to apply paints using known paints and by known painting methods, but in particular, after pretreatment, adding cement or gypsum to the acrylic or epoxy paints and applying hardeners in powder form. If a method of overcoating with a synthetic paint made by mixing is adopted, a fine uneven pattern made of particles of the cement, etc. mentioned above can be formed on the surface of the paint film, and the gloss and smoothness of the surface can be suppressed. Due to the synergistic effect of the overall wood texture pattern 41 and the fine surface pattern, it is possible to create a simulated wood that is closer to natural wood, thereby greatly increasing the commercial value.

It goes without saying that the above-mentioned coating may be divided into 311 or more parts, such as an undercoat, an intermediate coat, and a topcoat.

The fake wood 5 manufactured as described above is used, for example, as the fake wood supports 5a and the fake wood beams 5b of the fake wood fence shown in FIG. In this case, the pseudo-wood support 5a and the pseudo-wood crosspiece 5b may be connected by welding, and the connection structure is not particularly limited, but the following structure facilitates assembly and disassembly.

That is, in FIGS. 4 to 7, the pseudo-wood posts 5a are constructed of the above-mentioned pseudo-wood 5, and are erected at predetermined intervals on the ground or the like. A lid body 51 is provided at the upper end of each pseudo-wooden support 5a.
are fixed by welding or the like, and an annual ring-like pattern 52 is formed on the surface of the lid 51. A bolt insertion hole 53 penetrating in the radial direction is provided at the vertical intermediate portion of each pseudo-wooden support 5a to attach the bar.
A bracket 6 is removably protruded from one or both sides of a through a bolt 61 and a nut 62. The bracket 6 may be fixed to the surface of the pseudo-wood support 5a by welding. The tip of the bracket 6 has a bolt insertion hole 6 that passes through it in the vertical direction.
3 is provided.

On the other hand, the pseudo-wood crosspiece 5b is constructed of the above-mentioned pseudo-wood 5 similarly to the pseudo-wood support 5a. However, this pseudo-wood frame material 5b is formed to a length corresponding to the interval between the pseudo-wood posts 5a, and both ends thereof are cut into an arc shape corresponding to the circumferential surface of the pseudo-wood posts 5a, and near both ends, the surrounding wall earth part A bolt insertion hole 54 corresponding to the bolt insertion hole 63 of the bracket 6 is provided in the lower part of the peripheral wall, and a notch 5 corresponding to the bracket 6 is provided in the lower part of the peripheral wall.
5 is provided.

Then, the bracket 6 is inserted into and hidden inside both ends of the fake wood support 5b through the notch 55, and the arcuate ends of both ends of the fake wood support 5b are in contact with the circumferential surface of the fake wood support 5a. Both ends of the artificial wooden beams 5b are connected to the brackets 6 by bolts 64 and nuts 65, whereby the artificial wooden beams 5b are erected between the respective artificial wooden supports 5a, and a predetermined artificial wooden fence is assembled.

〔Effect of the invention〕

As described above, the method of the present invention uses a plurality of rollers with protrusions to directly form a large number of wood texture uneven patterns on the surface of a metal tube, and then colors the surface in a wood texture color. The synergistic effect of the uneven pattern and the coloring makes it possible to create pseudo-wood that is extremely close to natural wood and has high commercial value. Further, according to this method, a wood texture pattern can be easily formed using existing pipe rolling or forming equipment, and equipment costs can be reduced. Moreover, even long pieces can be easily continuously molded, improving mass productivity and significantly reducing costs. In addition, since a large number of wood grain-like uneven patterns are formed directly on the surface of the metal pipe, the paint adheres better when painting that surface, and the coating film is thinner than when conventional plastic coating scraps are provided. This allows you to move around the highly durable simulated wood without the paint peeling off or cracking.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional front view showing an example of the manufacturing process of pseudo-wood according to the method of the present invention, Fig. 2 is a side view thereof, Fig. 3 is a perspective view of the pseudo-wood, and Fig. 4 is a pseudo-wood using the above-mentioned pseudo-wood. A perspective view showing an example of a wooden fence, FIG. 5 is an exploded longitudinal cross-sectional view of the connecting part between the artificial wooden support and the artificial wooden crosspiece, and FIG. 6 is a vertical cross-sectional view showing the connected state.
FIG. 7 is a cross-sectional view of the same. 4...Metal tube, 41...Wood texture uneven pattern, 42...
・Painting film, 5...Fake wood, 5a...Fake wood support, 5b・
・Faux wood crosspiece material.

Claims (1)

[Claims] 1. A metal tube is fed between a plurality of rollers each having a large number of protrusions discontinuously protruding from the surface to form a wood texture pattern, and the rollers are driven to form a metal tube by the protrusions. 1. A method for producing pseudo-wood, which comprises forming a wood texture-like uneven pattern on the surface of the pipe, and then coloring the surface of the metal tube in a wood-skin color to produce pseudo-wood.