JP3066395B2 - Reinforced laminated wood and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced laminated wood used for building materials, vehicle beds, sleepers, civil engineering works, furniture, fittings, various tools, and the like, and a method for producing the same.

[0002]

2. Description of the Related Art Wood is easy to process, has good electrical and thermal insulation properties, and is excellent as various materials. However, wood that has been transported from forests has significant shrinkage, expansion, and curvature due to wet and dry conditions. There are disadvantages such as inhomogeneity, anisotropy, and the like, which may be inconvenient for use.

[0003] Therefore, wood carried out of the forest by rotary cutting or the like is thinly cut and cut into appropriate dimensions, and an adhesive is applied to a single veneer to laminate a number of sheets. It is generally used as a laminated wood obtained by heat curing the agent and laminating veneers.

[0004]

However, as described above, in the conventional laminated wood , the veneer is laminated with an adhesive therebetween.
To which the adhesive because only bonded thermally cured in a hot press machine or the like, wood strength so River and wood
However, there was a drawback that the wood strength was low.

The present invention has been proposed in view of the above points, and aims to improve the strength of wood and expand the range of use.
The purpose is to do so.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is to stack a predetermined number of veneers cut to an appropriate size.
The veneers are bonded together with an adhesive, and the veneers are formed by compression in a high-temperature, high-pressure steam atmosphere.
Shaped and compressed to about 1/2 to 1/3 in cross-sectional area ratio
And the compression deformation is fixed by high-temperature and high-pressure steam.
Provide standardized reinforced laminated wood.

Further, the present invention relates to a single unit cut to an appropriate size.
Interposed an adhesive plate constitute a laminated veneer structure with a predetermined number of stacked, high temperature and high pressure to the veneer laminate structure at a high temperature and a high pressure vessel
Each veneer of the veneer laminated structure placed in a steam atmosphere
Is heated and softened by high-temperature and high-pressure steam.
Then, a mechanical compression force is applied to the veneer laminated structure to
Each veneer of the layered structure is compressed to about 1/2 to 1/3 in cross-sectional area ratio
After molding, the compression molding of each veneer of this veneer laminated structure
Deformation due to shape in high temperature and high pressure steam atmosphere
Provided is a method for producing reinforced laminated wood fixed by steam .

[0008]

According to the present invention, when a single-plate laminated structure is placed in an atmosphere of high-temperature and high-pressure steam in a high- temperature and high-pressure vessel, the temperature of each veneer of the single-plate laminated structure is increased by the high-temperature and high-pressure steam and softened. In this state, a mechanical compression force is applied to the veneer laminate structure.
Each veneer is compression molded and the veneer laminated structure is
Deformation of each veneer due to compression molding is performed in a high-temperature, high-pressure steam atmosphere.
When it is fixed in the air by high-temperature and high-pressure steam , the lumen formed inside each veneer of the veneer laminated structure becomes small and hard and strong wood can be obtained.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. 1 and 2 are schematic general views showing an example of an apparatus for carrying out the method of the present invention.
Denotes a high-temperature and high-pressure container, and 3 denotes a press machine.

As shown in FIG. 3, the veneer laminated structure 1 is obtained by applying a glue 5 to a veneer 4 obtained by cutting a thin piece of wood by rotary cutting or the like and then cutting it to an appropriate size. The reinforced laminated timber of the present invention is manufactured by processing this as described later.

The high-temperature and high-pressure vessel 2 has a lid 7 openably and closably attached to an opening of a vessel body 6 made of high-strength steel or stainless steel, and has a steam pipe 8 extending from a steam supply device (not shown). And a steam drain pipe 9 extending toward the above-mentioned steam supply device, and a high temperature (100 to 18) through the steam pipe 8 from the steam supply device.
0 ° C.) and high-pressure (1.2 to 25 kg / cm ² ) steam are supplied to the inside, and the steam drain is recovered to the steam supply device through the steam drain pipe 9. Reference numeral 10 denotes an exhaust pipe.
Through the air to depressurize the inside.

As shown in FIGS. 1 and 2, the pressing machine 3 includes a forming die 12 having a concave section having a groove 11 large enough to accommodate the single-plate laminated structure 1, and a plurality of press cylinders 13.
The plunger 14 is fitted into the groove 11 of the molding die 12 by the descending operation of 13. The single-plate laminated structure 1 housed in the groove 11 of the molding die 12 is compressed by the plunger 14.

Next, a method of manufacturing a reinforced laminated wood according to the present invention will be described. First, the veneer 4 obtained by thinly cutting wood by rotary cutting or the like and then cutting it into an appropriate size is coated with an adhesive 5 to prepare a veneer laminated structure 1 in which a suitable number of veneers are laminated. The single-plate laminated structure 1 may be laminated such that the fiber directions of the veneers 4 of the respective layers are appropriately orthogonal to each other or may be laminated in parallel.

Next, the lid 7 of the high-temperature and high-pressure container 2 is opened, from which the single-plate laminated structure 1 is carried into the high-temperature and high-pressure container 2 and housed in the groove 11 of the molding die 12 of the press machine 3. Next, after closing the lid 7 of the high-temperature and high-pressure container 2 and sealing the high-temperature and high-pressure container 2, a high-temperature (100 to 180 ° C.) and high-pressure (1.2 to 25 kg / cm ²⁾ ), And the single-plate laminated structure 1 is heated by the high-temperature and high-pressure steam. Then, in this state, the single-plate laminated structure 1
Is heated for a predetermined time (1 to 10 minutes), the veneers 4, 4... Of the veneer laminated structure 1 absorb steam and the temperature rises, whereby the veneers 4, 4 of the veneer laminated structure 1 are heated. ... softens.

Thus, each veneer 4, 4 of the veneer laminated structure 1
Are softened, the plunger 14 of the press 3 is lowered by the press cylinders 13, 13 so as to fit into the grooves 11 of the forming die 12, and the single-plate laminated structure 1 housed in the grooves 11 of the forming die 12. As shown in FIG. 4, compression molding is performed with a plunger 12 to a sectional area ratio of about 1/2 to 1/3. At the same time, the adhesives 5, 5,... Of the single-plate laminated structure 1 are thermoset by high-temperature, high-pressure steam. In this state, the laminated structure 1 is kept for a predetermined time (1
1010 minutes) to immobilize.

When the single-plate laminated structure 1 having the adhesives 5, 5,... Thermoset at the same time as being compression-molded as described above is fixed, the interior of the high-temperature and high-pressure container 2 is evacuated through the exhaust pipe 11 to release the pressure. Thereafter, the lid 7 of the high-temperature and high-pressure container 2 is opened and opened, and the plunger 14 of the press 3 is raised by the press cylinders 13, 13, and the single-plate laminated structure fixed from the mold 12 of the press 3. 1 is taken out of the high-temperature and high-pressure container 2 to complete the processing.

When the single-plate laminated structure 1 is placed in the high-temperature and high-pressure steam atmosphere in the high-temperature and high-pressure vessel 2 as in the present invention, the single plates 4, 4... Of the single-plate laminated structure 1 absorb the high-temperature and high-pressure steam. Then, the temperature of the veneer 4 itself rises, whereby the veneers 4, 4... Of the veneer laminated structure 1 are softened. In this state, when a mechanical compression force is applied to the single-plate laminated structure 1 by press forming by the press machine 3, each of the single plates 4, 4,.
Is compressed, so that the inner cavity formed in the veneer 4 becomes small, hard and strong, and the material and dimensions are stabilized. At the same time, acetic acid produced by liberation of the acetyl group of hemicellose contained in wood acts as a catalyst to partially depolymerize hemicellose and lignin, thereby inhibiting the growth of wood rot fungi (basidiomycetes, etc.). Chemical products such as phenolic compounds and furfural compounds having odor are generated, and the decay resistance of the veneer laminate 1 is improved. Moreover, in the present invention, since the processing is performed in the high-temperature and high-pressure steam atmosphere in the high-temperature and high-pressure container 2, the adhesives 5, 5,... Are thermoset in a short time, and the manufacturing cost can be reduced.

FIG. 5 shows a continuous system which is another example of an apparatus for implementing the method of the present invention, which will be described below. In FIG. 5, the same reference numerals as those in FIG. 1 denote the same members, and a duplicate description will be omitted. In FIG. 5, 15 is a high-temperature and high-pressure container, 16 is a pushing cylinder, 17 is a roller press machine, and 18 is a fixed case.

The high-temperature and high-pressure vessel 15 is provided with lids at both open ends of a cylindrical vessel body 19 made of high-strength steel or stainless steel.
20 and 21 are openably mounted. Inside the preheating chamber 22, a press chamber 23 and a fixing chamber 24 are divided by gate valves 25 and 26 which can be opened and closed in series and closed. . The preheating chamber 22 is provided with a receiving stand 27 for horizontally supporting the single-plate laminated structure 1 and a preheating heater (not shown) such as high-frequency or steam. The single-plate laminated structure 1 supported and placed at a predetermined temperature (80 to 1) by the heater.
20 ° C). The press room 23 is provided with a steam pipe 28 extending from a steam supply device (not shown) and a steam drain pipe 29 extending toward the steam supply device. The steam pipe 28 is supplied from the steam supply device through the steam pipe 28. High temperature (100 ~ 1
80 ° C.) and high pressure (1.2 to 25 kg / cm ² ) steam to heat the single-plate laminated structure 1 housed therein at a high temperature, and to collect the steam drain through the steam drain pipe 29 to the steam supply device. It has become. An exhaust pipe 30 open to the atmosphere is provided in the fixing chamber 24, and the interior of the chamber is depressurized by exhausting air through the exhaust pipe 30.

The pushing cylinder 16 is fixed to the outside of the lid 20 of the high-temperature and high-pressure container 15 by a suitable means so as to correspond to the single-plate laminated structure 1 mounted and supported on the receiving stand 27. The pusher 32 is attached and fixed to the tip of a piston rod 31 that penetrates into the preheating chamber 22 of the high-temperature and high-pressure container 15, and the pedestal in the preheating chamber 22 of the high-temperature and high-pressure container 15 The single-plate laminated structure 1 placed and supported on 27 is pushed by a pusher 32, and the single-plate laminated structure 1 is carried into the press chamber 23 of the high-temperature and high-pressure container 15.

The roller press 17 is a press roller in which a pair of two rollers are arranged in parallel so as to face each other up and down.
33 are rotatably supported on a frame 34 having a frame shape, and three rollers are rotatably supported in the drawing, and the roller gap between the press rollers 33, 33,. The preheating chamber 22 is gradually narrowed from the preheating chamber 22 to the press chamber 23 so as to be about 3 and is installed at an opening of the gate valve 25 on the press chamber side by an appropriate means. The single-plate laminated structure 1 in the heating chamber 22 is forcibly pushed by the pushing cylinder 16 and passed therethrough, whereby the single-plate laminated structure 1 is sequentially compressed by the respective press rollers 33, 33. .

As shown in FIG. 6, the fixed case 18 has an upper case 35 and a lower case 36, which are divided into upper and lower portions, and holds the two cases 35 and 36 in a square tube shape by abutting the two cases 35 and 36. .., And the single-plate laminated structure 1 pressed by the roller press 17 is housed therein. Further, the fixed case 18 is movably mounted via wheels 40 and 40 so as to be able to transfer to the gantry 38 and 39 provided in the press chamber 23 and the fixing chamber 24 of the high-temperature and high-pressure container 15, Press room for high-temperature and high-pressure vessel 15 with appropriate moving means
It moves between 23 and the fixing chamber 24.

Next, a method of manufacturing reinforced laminated wood in this embodiment will be described. First, the veneer 4 obtained by thinly cutting wood by rotary cutting or the like and then cutting it into an appropriate size is coated with an adhesive 5 to prepare a veneer laminated structure 1 in which a suitable number of veneers are laminated. Next, as shown in FIG. 5, the gate valves 25 and 26 of the high-temperature and high-pressure container 15 are closed, and
With the fixed case 18 in the press room 23,
The lid 20 of 15 is opened, from which the single-plate laminated structure 1 is carried into the preheating chamber 22 of the high-temperature and high-pressure container 15 and placed and supported on the receiving table 27.
Next, the lid 20 of the high-temperature and high-pressure
Is closed, and the single-plate laminated structure 1 placed and supported on the receiving table 27 by the heater is preheated at a predetermined temperature (80 to 120 ° C.).

As described above, the single-plate laminated structure 1 is maintained for a predetermined time (1
After preheating, the gate valve 25 is opened and the preheating chamber 22 and the press chamber 23 of the high-temperature and high-pressure vessel 15 are connected to each other.
High temperature (100 to 1) supplied through steam pipe 28 to 23
The single-plate laminated structure 1 is heated with steam at 80 ° C. and high pressure (1.2 to 25 kg / cm ² ). When the single-plate laminated structure 1 is heated for a predetermined time (1 to 10 minutes) in this state, each of the single plates 4, 4,... Of the single-plate laminated structure 1 absorbs high-temperature and high-pressure steam, and the temperature rises. Each veneer 4 of the veneer laminated structure 1,
4 ... softens.

Thus, each veneer 4, 4 of the veneer laminated structure 1
… Is softened, the piston rod 31 of the pushing cylinder 16 is
The forged single-plate laminated structure 1 mounted and supported on the receiving table 27 of the preheating chamber 22 is forcibly moved to the fixed case 18 via the roller press 17 by the pusher 32 fixed to the tip of the piston rod 31. By pressing, the single-plate laminated structure 1 is cross-sectional area ratio of 1 /
.. Are housed in the fixed case 18 after being compression-molded to about 2 to 1/3, and at the same time, the adhesives 5, 5,...

When the single-plate laminated structure 1 is compression-molded and stored in the fixed case 18 at the same time as the adhesives 5, 5,... Of the single-plate laminated structure 1 are thermally cured, the piston rod 31 of the pushing cylinder 16 is retracted. After that, the gate valve 25 is closed to shut off the pre-heating chamber 22 and the press chamber 23, and then the gate valve 26 is opened to connect the press chamber 23 and the fixing chamber 24, as shown by the imaginary line in FIG. As described above, the fixed case 18 is
Move from 23 to immobilization chamber 24. Thereafter, the gate valve 26 is closed to shut off the press chamber 23 and the fixing chamber 24. In this state, the single-plate laminated structure 1 stored in the fixing case 18 is kept in the fixing chamber 24 for a predetermined time (1 to 10 minutes). Place and immobilize.

The single-plate laminated structure 1 thus compression-molded
Is fixed, the fixing chamber 24 is evacuated through the exhaust pipe 30 to release the pressure, and then the high-temperature and high-pressure container 15 is opened by opening the lid 21 and the latches 37 of the fixing case 18 are released. After the upper case 36 is separated from the lower case 36 of the fixed case 18, the single-plate laminated structure 1 fixed from the lower case 36 of the fixed case 18 is taken out of the high-temperature and high-pressure container 15 to complete the processing.

[0028]

As described above, according to the present invention,
It is constructed by laminating a predetermined number of wood veneers with an adhesive
The laminated veneer in a high-temperature, high-pressure steam atmosphere
Each veneer of the veneer laminated structure is softened by heating, and the veneer laminated
Applying a mechanical compressive force to the structure,
Compression molding of the veneer and compression molding of each veneer
Is fixed by high-temperature, high-pressure steam.
The lumen portion formed inside each veneer of the laminated structure is small, and can be made hard and strong wood.
As a result, the strength of the laminated wood is greatly improved, and it can be used for a wide range of roads, such as construction materials, civil engineering works, sleepers, vehicle beds, furniture, fittings, and various tools .

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an example of an apparatus for producing a reinforced laminated wood according to the present invention.

FIG. 2 is a longitudinal sectional view taken along line AA of FIG.

FIG. 3 is a side view of the single-plate laminated structure before compression molding.

FIG. 4 is a side view of the single-plate laminated structure after compression molding.

FIG. 5 is a schematic configuration diagram showing a continuous system which is another example of the apparatus for producing a reinforced laminated wood according to the present invention.

FIG. 6 is a perspective view of a fixing case.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Single-plate laminated structure 2 High-temperature / high-pressure container 3 Press machine 4 Veneer 5 Adhesive 12 Mold 13 Press cylinder 14 Plunger 15 High-temperature / high-pressure container 16 Push-in cylinder 17 Roller press 18 Fixed case 22 Preheating room 23 Press room 24 Fixed Chemistry room 27 Receiving stand 32 Pusher 33 Press roller 35 Upper case 36 Lower case 37 Latch

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Makoto Nakaji 4-9-5 Chiyoda, Takaishi City, Osaka Prefecture (56) References JP-A-49-6106 (JP, A) JP-A 50-64401 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B27D 1/04 B27K 5/00 B27K 5/06

Claims (2)

(57) [Claims] 1. A predetermined number of veneers cut to an appropriate size
The veneers are laminated and bonded to each other with an adhesive, and the veneers are compression molded in an atmosphere of high-temperature and high-pressure steam.
And it is compressed to about 1/2 to 1/3 in cross-sectional area ratio
In particular, the compression deformation is high in the atmosphere of high temperature and high pressure steam.
Reinforced laminated lumber characterized by being fixed by high-temperature steam . 2. A veneer cut to an appropriate size is sandwiched with an adhesive.
A single-plate laminated structure is formed by laminating a predetermined number of sheets, and the single-plate laminated structure is placed in a high-temperature and high-pressure steam atmosphere in a high- temperature and high-pressure container.
Place each veneer of the veneer laminated structure in the air
After softening by heating, the veneer
To apply a mechanical compression force to each veneer of the veneer laminated structure.
Compression molded to about 1/2 to 1/3 in cross-sectional area ratio,
Later, the deformation of each veneer of this veneer laminated structure due to compression molding
High temperature and high pressure steam in high temperature and high pressure steam atmosphere
A method for producing reinforced laminated wood, characterized by being fixed .