JPH09295302A - Consolidation of wood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the strength of wood by consolidation and thereby improve the mechanical strength at a surprisingly rapid rate by previously embedding a metallic core material in the wood to be consolidated. SOLUTION: A core material 2 comprising a metallic bar such as iron is embedded in wood 1 to be consolidated. Next, the wood 1 in which the core material 2 is embedded is charged into a molding die 7. After that, the molding die 7 in which the wood 1 is packed is set into a processing tank 3 to soften the wood 1. In addition, the softened wood 1 is pressed to fix the form of the consolidated wood 1. Further, heated vapor generated in the processing tank 3 is discharged to the outside from piping 5 for vapor discharge, and the interior of the processing tank 3 is cooled by an appropriate cooling means. Then the molding die 7 is taken out of the processing tank 3 by opening a press cylinder 6, and the consolidated wood 1 is released from the molding die 7 to complete the consolidating process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for consolidating timber for effective utilization of thinned wood and the like removed during the growth process of, for example, cedar and cypress.

[0002]

2. Description of the Related Art At present, the technique of consolidating wood has reached the stage of practical use, and various methods of consolidation have been tried.

The purpose of compaction of wood is to make wood wood denser, thereby increasing the mechanical strength and hardness of the wood so as to raise the quality of wood, and the molding process is easier than conventional cutting processes. It is intended to increase the utility value of wood by improving productivity, etc., and in particular, it is expected to effectively use thinned wood and the like that are removed during the growth process of cedar and cypress.

Representative examples of the method for consolidating wood are as follows. The wood loaded in the mold is softened by steam heating and then pressed. After the wood is softened by steam heating in advance, it is pressed into a pod with a cross-sectional area smaller than the original size. The wood is compressed with a hot plate press. The wood is continuously rolled with heated rolls.

Normally, in each of the above-mentioned methods (1) to (4), the compacted state is fixed by further high heat treatment in the compacted state.

[0006]

The conventional consolidation of wood is limited to the method of processing only wood, and the increase in strength due to consolidation is naturally limited. Therefore, for example, there is a problem in that wood cannot be used in a place where danger is predicted to be safe, such as a playground equipment or a shelf in an outdoor park, although a woody feel is preferred.

Further, in the pushing method shown above, there are some cases in which the diameter of the wood is small or long wood or the like causes buckling during the pushing and cannot be commercialized.

An object of the present invention is to provide a method for consolidating wood that solves the above problems.

[0009]

In order to achieve the above-mentioned object, the present invention is characterized in that, in a method for consolidating wood, the wood to be consolidated is previously embedded with a metallic core material. And That is, in the wood to be consolidated, a hole having a diameter slightly larger than the diameter of the metallic core material to be embedded in the wood is bored, and after inserting the metallic core material into the hole, This is to consolidate wood.

In the wood obtained by the consolidation method of the present invention, the mechanical strength is dramatically improved by adding the strength enhancement by the metal core material in addition to the strength enhancement by the consolidation.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

In FIGS. 1 to 4, 1 is wood such as thinned wood, 2 is a core material made of a metal rod or pipe such as iron, stainless steel or aluminum, and 3 is high so as to withstand high temperature and high pressure. A cylindrical treatment tank made of high-strength iron, stainless steel or the like is provided with a steam supply pipe 4 for supplying heated steam to the inside and a steam discharge pipe 5 for discharging the heated steam inside. . Reference numeral 6 denotes a press cylinder provided above the processing tank 3 with appropriate mounting and fixing means (not shown) facing downward, and the piston rod 6a is hermetically sealed on the upper wall of the processing tank 3 via a seal member (not shown). It is also slidably inserted. Reference numeral 7 denotes a die mounted between a base 8 provided at the inner bottom of the processing tank 3 and a piston rod 6a of the press cylinder 6, which has a V-shaped cross section opened upward at an expansion angle of 90 degrees. It is composed of a mold 7a and an upper mold 7b having a V-shaped cross section which is opened downward at an expanding angle of 90 degrees.

Next, a method for compacting wood according to the present invention will be described.

First, as shown in FIG. 1, a core material 2 made of metal such as iron, stainless steel or aluminum or a pipe is embedded in wood 1 to be consolidated. That is, the hole 1a having a diameter slightly larger than the diameter of the core material 2 in the length direction of the wood 1.
Is drilled with a drill or the like, and the core material 2 is inserted into this hole 1a.

Next, as shown in FIG. 2, the wood 1 in which the core material 2 is embedded is loaded into the mold 7. That is, the wood 1 in which the core material 2 is embedded is placed on the lower die 7a of the die 7, and the upper die 7b is placed thereon so that the wood 1 is sandwiched by the lower die 7a. .

Subsequently, as shown in FIG. 3, the mold 7 loaded with the wood 1 is mounted on the processing tank 4. That is, the mold 7 loaded with the wood 1 is loaded into the processing tank 3 and mounted between the base 8 provided at the bottom and the piston rod 6a of the press cylinder 6.

Next, the wood 1 loaded in the mold 7 mounted in the processing tank 3 is softened. That is, the steam supply pipe 4
The heating steam is supplied to the inside of the processing tank 3 from above, and the inside of the processing tank 3 is heated by this heating steam. By placing the wood 1 inside the treatment tank 3 whose temperature has been raised by the heated steam for a predetermined time, the wood 1 is heated by the heated steam and uniformly softened.

Subsequently, as shown in FIG. 4, the softened wood 1 is pressed. That is, the press cylinder 6 is operated to extend the piston rod 6a, and the extension operation of the piston rod 6a pushes down the upper die 7b. Thus, by pressing down the upper mold 7a of the mold 7 loaded with the wood 1 by the pressing force of the press cylinder 6, the softened wood 1 is compacted by the pressing force of the press cylinder 6 and at the same time A lower die 7a and an upper die 7b of 7 form a desired shape, that is, a rectangular cross section.

Next, the consolidated form of the wood 1 is fixed. That is, while the wood 1 is pressed by the press cylinder 6 through the mold 7, the heated steam is supplied from the steam supply pipe 4 into the processing tank 3, and the wood 1 is heated again by the heated steam. By heating the wood 1 again while pressing the wood 1 for a predetermined time, the wood 1 undergoes a chemical change due to the heated steam, and the consolidated form is fixed.

After that, the heated steam inside the treatment tank 3 is discharged to the outside from the steam discharge pipe 5, and the inside of the treatment tank 3 is cooled by an appropriate cooling means (may be air cooling), and then the press cylinder. 6 is opened, the mold 7 is taken out from the processing tank 3, and the consolidated wood 1 is removed from the mold 7 to complete the consolidation.

The wood 1 compacted by the method of the present invention is
Since the metallic core material 2 is embedded in advance, in addition to the strength increase due to consolidation, the strength increase due to the metal core material 2 is added, so that the mechanical strength is dramatically improved. Therefore, the present invention can be applied to a place which could not be used conventionally due to a strength problem although a woody feel is preferred, such as a playground equipment or a shelf in an outdoor park.

In the above embodiment, the wood 1 having the metallic core material 2 previously embedded therein is consolidated by the consolidation method described in the prior art. The present invention is not limited to this, and the consolidation may be performed by any of the consolidation methods (1) to (4) described in the related art, or may be performed by a consolidation method other than those.

FIG. 5 shows an embodiment in which the consolidation is carried out by the consolidation method described in the prior art.

In FIG. 5, numeral 9 is made of high-strength iron, stainless steel or the like, has a length larger than that of the wood 1, and the inner cylinder has a double cross section smaller than the original size cross section of the wood 1. With a sheathed tube having a bottomed cylindrical structure, the steam supply pipe 10 for supplying heated steam into the heating jacket 9a between the inner cylinder and the outer cylinder and the heated steam in the heating jacket 9a to the outside. A steam discharge pipe 11 for discharging is provided. Reference numeral 12 is a diaphragm die provided at the open end of the sheath tube 9, and is formed in a conical cylindrical shape whose diameter gradually decreases from the original opening side 12a toward the final opening side 12b. A pressing cylinder 13 is provided so as to face the drawing die 12, and a pressing plate 14 is provided at the tip of the piston rod 13a.

First, wood 1 in which a metallic core material 2 has been embedded in advance is softened by heating with steam, and this is softened by a drawing die 12 provided at the open end of the sheath tube 9 and the tip of the piston rod 13 of the pushing cylinder 13. It is loaded between the pushing plates 14 provided in the. Next, the piston rod 1 of the pushing cylinder 13
3a is extended to push the pushing plate 14 forward, and the forward movement of the pushing plate 14 pushes the heat-softened wood 1 into the pushing cylinder 1
By forcing the wood piece 1 toward the drawing die 12 by the pressing force of 3, the wood piece 1 is pressed into the inside of the pod 9 while the cross-sectional area of the wood piece 1 is narrowed and is consolidated. Subsequently, heating steam is supplied from the steam supply pipe 10 into the heating jacket 9a of the pod 9, and the wood 1 is heated again by the heating steam to fix the consolidation of the wood 1. Thereafter, the heated steam in the heating jacket 9a of the sheath tube 9 is discharged to the outside from the steam discharge pipe 11, and the inside of the sheath tube 9 is cooled by an appropriate cooling means (air cooling may be performed), and then consolidated. The solidified wood 1 is taken out from the pod 9 to complete the consolidation.

In this case, in addition to the strength increase due to the consolidation, the strength increase by the metallic core material 2 is added to dramatically improve the mechanical strength, and the heat-softened wood 1 is forced by the pushing cylinder 13. Squeeze die 12
Even if it is pushed into, the wood 1 does not buckle because it is reinforced by the core material 2.

In the above embodiment, the wood 1 is softened by heating with steam, but the present invention is not limited to this, and wood other than steam heating, such as cooking or microwave heating, is used. It is also possible to soften 1.

[0028]

As described above, according to the present invention,
Since the metal core material is embedded in advance in the wood to be consolidated, mechanical strength is dramatically improved by adding strength enhancement by the metal core material in addition to the strength enhancement by consolidation. It has an advantage that it can be used in places where it was not possible to use it due to strength problems even though it has a woody feel, such as playground equipment and shelves in outdoor parks, especially the growth process of cedar and cypress. It will be possible to effectively use the thinned wood, etc., which is removed in a wide range. Further, when consolidation is carried out by the pushing method, the buckling of the wood is eliminated at the time of pushing, and it is possible to commercialize wood having a small diameter and long wood.

[Brief description of drawings]

FIG. 1 is a drawing showing a wooden piece to be consolidated by the method of the present invention, in which (a) is a horizontal sectional view and (b) is a vertical sectional view.

FIG. 2 is a schematic view showing a state in which wood to be consolidated by the method of the present invention is loaded in a mold.

FIG. 3 is a cross-sectional view of a device for consolidating wood according to the method of the present invention before consolidation.

FIG. 4 is a transverse cross-sectional view after consolidation of an apparatus for compacting wood by the method of the present invention.

FIG. 5 is a vertical cross-sectional view of another apparatus for consolidating wood by the method of the present invention during consolidation.

[Explanation of symbols]

 1 Wood 2 Core material 3 Processing tank 6 Press cylinder 7 Mold 9 Sheath tube 12 Drawing die 13 Push cylinder

Claims (2)

[Claims] 1. A method for consolidating wood, which comprises mechanically compressing wood to consolidate it, wherein the wood to be consolidated is preliminarily embedded with a metallic core material. Consolidation method. 2. The wood to be consolidated is provided with a hole having a diameter slightly larger than the diameter of the metallic core material to be embedded in the wood, and the metallic core material is inserted into this hole. The method for consolidating wood according to claim 1, further comprising consolidating the wood.