JP2857734B2 - Split piece laminated material and its manufacturing method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to the use of wood resources such as small-diameter trees, bamboos and the like, which have not been said to be used effectively, in furniture, houses, other buildings and structures, The present invention relates to a split piece laminated material that can be used as a column material, a beam material, and the like, a manufacturing method thereof, and a manufacturing apparatus.

[0002]

2. Description of the Related Art Until now, as a timber-based structural material such as a pillar or a beam, a lumber product obtained by cutting a log into a predetermined size and shape has been most commonly used. Lumber products are usually formed from lumber having a diameter of 100 mm or more, and the yield from the standing tree body is 50%.
６０60%, the yield of lumber products obtained from a single standing tree including branches is reduced to about 30-50%.
Furthermore, lumber products often have disadvantages such as knots, in which case the strength of the lumber products must be significantly reduced as compared to the strength inherent in wood. That is, the strength of the lumber product having the knots is 4 times higher than that without the knots.
It decreases by 0 to 50%.

[0003] In addition, glued laminated timber (one obtained by laminating and bonding plate materials by sawing) devised to solve the problem of strength and the like due to defects such as knots of lumber products, the defects due to knots and the like are dispersed. As a result, the strength ratio is improved to 0.6 to 0.75, but most of the xylem is consumed by the cutting process for forming the plate material, and the yield from standing trees is reduced to about 30 to 40%.

[0004] In the case of a veneer laminate (LVL) in which veneers are laminated and bonded, a sawing process is not required to form a veneer as in a normal lumber processing, so the above-mentioned lumber product is used. As in the case of glued lumber, sawdust is not generated and the yield from standing trees is improved to 60-70%, and the strength is almost the same as glued lumber. Therefore, only large diameter logs can be used.

[0005]

As is well known, wood and bamboo have many advantages, such as good texture, easy acquisition and processing, and reproducibility. Widely used from. However, with the increase in the world population and the improvement of living standards, the use of wood and the like has increased remarkably, and the demand for woody materials has become more sophisticated and diversified. For this reason, in addition to traditional lumber, glued laminated timber, laminated veneer (plywood, LVL)
New wood-based materials have been developed.

[0006] However, conventional lumber products, laminated materials, and laminated veneers (plywood, LVL) have a problem that limited forest resources cannot be used effectively. In other words, sawn timber and glulam can be used only for less than half of the standing tree volume,
Moreover, even if the veneer laminate can use 60 to 70% of the volume of the log, the log is limited to an extremely large diameter. At present, when the trend of declining forest resources and the resulting deterioration of the environment are publicized, when using wood as a material for furniture, buildings, structures, etc. It is not an exaggeration to say that the realization of a technology for minimizing the generation of wasted parts is an urgent issue. The present invention is intended to solve such a problem.

[0007]

SUMMARY OF THE INVENTION A split piece laminate according to the present invention is obtained by laminating a plurality of wood-based strips to which an adhesive has been applied to a desired shape and size using a mold, and pressing the wood-based strips under heating. The plurality of wood-based strips are fixed to each other, the thinned wood and other small-diameter trees, bamboo and other raw materials having a predetermined length,
Cut into a plate material having a thickness and width, split this plate material to form a plate-shaped split piece that has a predetermined length, thickness and width and is easily bent, and further divide this plate-shaped split piece into fine pieces. It is formed of a very easily split plate-like split piece that is formed by splitting. Furthermore, the split piece laminated material according to the present invention is wood,
A single layer consisting of a plurality of fine split pieces obtained by splitting a plate-like split material formed by splitting a plate material such as bamboo in the longitudinal direction into fine fibers in the fiber direction is further arranged in the horizontal and vertical directions. A plurality of joints in the vertical direction are provided, and a horizontal joint portion of each single layer is provided at a position separated from a joint portion of another layer overlapping with the layer having the joint portion in the laminating direction of the single layer, and each split material is provided. Are solidified by an adhesive under pressure.

[0008] The method for manufacturing a split piece laminated material according to the present invention includes: (a) cutting a raw material such as wood or bamboo into a length X; (b) cutting the raw material cut into a predetermined length. A step of cutting a material to obtain a plate material of a predetermined width having a length of X mm and a thickness of A mm; (c) splitting the plate material along a fiber direction to form a square having a cross section of Amm × Bmm (A>B); And the length is X
(d) splitting the split material further along the fiber direction to form a rectangular shape having a cross section of Bmm × Cmm (B> C) and a length of Xmm; (E) a step of drying the split material; (f) a step of applying an adhesive to each of the dried split materials; and (g) a step of applying the adhesive-coated split material to a predetermined size. A step of forming a single layer in the mold in parallel with each other in the longitudinal direction, and laminating the single layers into a plurality to obtain a split mat having the same shape as the mold; (h) cold-setting the split mat. A step of pressing and shaping with a press, (i) a step of pressing the shaped shredded mat further with a hot press to solidify the adhesive in a pressurized state, and (j) an adhesive in the step. Curing the solidified split piece mat to obtain a split piece laminated material; You.

Further, the method for manufacturing a split piece laminate according to the present invention has the following configuration. Raw material such as interleaving wood and other small diameter wood, bamboo, etc. is cut into a plate having a predetermined length, thickness, and width, and the plate is conveyed to a splitting device by a conveying means and split into predetermined lengths and thicknesses. Then, a plate-shaped split piece having a width is formed. Next, the plate-shaped split pieces are conveyed to a fine splitting device, where the split pieces are further split into small split pieces having a predetermined length, thickness and width.
The fine split pieces are conveyed to a drying device and dried with hot air.
After the drying step, each of the split pieces is applied with an adhesive by spraying from both upper and lower directions while being conveyed by a mesh belt conveyor. The split pieces are then sent to a laminating means consisting of a retractable belt conveyor. As each of the split pieces is sent out from the mesh belt conveyor, the belt conveyer of the laminating means is advanced in the direction of the conveying means, and the finely split pieces are sequentially moved on the belt conveyor on which the conveying means can reciprocate. While laying them on each other, a single layer of the split pieces is sequentially formed. Next, the belt conveyor of the conveying means moves back, and another single layer is sequentially laminated on each of the single layers, and further another single layer is further laminated thereon. To form a split fission mat approximately equal in size. At this time, the ends (joined portions) of the single layers are formed so as to be shifted from each other in the laminating direction. The formation of the single layer and the loading of the single layer are performed by the cooperation of the adhesive application means, the loading means, and the transport means, and the operation required for each means is performed by the well-known control means. . The split mats are sequentially sent to the cutting device by the conveying means and adjusted to a predetermined length, and then sent to the pressing means, where they are heated and pressed to cure the adhesive. A split piece laminate is obtained by curing the adhesive.

[0010] Further, in the above-mentioned step, a configuration may be adopted in which a glass fiber cloth is inserted between the single layers to be laminated.

An apparatus for manufacturing a split piece laminated material according to the present invention includes means for splitting wood, bamboo and other raw materials in the longitudinal direction;
Means for further splitting the split material obtained in the splitting step in the longitudinal direction, means for drying the finely split split material, means for applying an adhesive to the dried split material, and adhesive Each of the applied split materials is arranged side by side in the longitudinal direction to form a single layer, a means for laminating the single layers into a plurality, and means for heating and pressing the stacked split materials are provided. Have been.

[0012] The present invention has the above-mentioned structure, and thus has not been used so far, a small diameter tree, a branch of a standing tree which was conventionally discarded in a forest, a scrap material which has been generated in the lumbering process and which has been incinerated until now. , Realizing the provision of new and useful wood-based materials that can also be used for various types of waste materials. This new wood-based material can be used in furniture, buildings,
It is useful as a material for various structures.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIGS. 1 and 2 show one example of a manufacturing process of a split piece laminate.
It is a figure showing an example. In this example, willow, masatake, cedar, and waste wood of a house were used as raw materials, and split laminates were manufactured using each raw material alone. However, it is a matter of course that these raw materials may be mixed. . In the figure, 1 is a small diameter wood of a willow (diameter 20 to 50 mm), 2 is a bamboo having a diameter of 20 to 100 mm, 3 is a cedar, 4 is a waste material generated by dismantling a house or the like, and a bamboo 1 and a willow 2 are rotated by a rotary saw. Cut to a length of 600 mm to obtain fixed length members 1a and 2a, respectively. After cutting the cedar 3 and the waste material 4 to a length of 600 mm,
The sheet is cut into an m-thick plate to obtain predetermined fixed-length members 3a and 4a.
Next, each fixed-length material made of the raw material is split into splitters 5 described later.
To make a 10 mm thick split piece 6. The thus obtained split piece 6 is further finely split by the fine splitting device 7 and has a cross section of 4 mm which bends very easily.
It becomes a split piece 8 of × 10 mm. In addition, here 600m
The raw material less than m is also used after splitting.

Next, the split pieces 8 are placed in a drier 9 for 10 to 10 minutes.
Laminated to a thickness of 20mm, 180-200 ° C, wind speed 10
m / sec. And dry for 5-10 minutes. Drying may be natural drying. In this case, drying is performed for 2 to 3 days with air at room temperature.
The dried fine split pieces 8 are sprayed with a phenol resin adhesive (10% by weight of the fine split pieces) in the rotating drum 10. After the application of the adhesive, the fine split pieces 8 are placed in a wooden frame (6
50 × 650), a single layer of fine split pieces is formed in parallel in the longitudinal direction, and the single layers are sequentially laminated to a thickness of 80 mm to 12 mm.
A 0 mm fine split mat 12 is obtained. When laminating the single layers, the layers are laminated so that the longitudinal ends of the single layers are shifted from each other so that the ends do not coincide in the laminating direction. In addition, the first and second upper and lower third layers of each single layer are stacked in the order of 0.1.
If a glass fiber cloth having a thickness of 1 to 0.2 mm is inserted, the quality of the final product is improved, and even if the nail is driven into the end portion, it does not break. Therefore, in order to prevent cracking due to nailing, a glass fiber cloth may be provided only at the end.

The cracked piece mat obtained in the above process is pressed by a cold press 13 at a press pressure of 6 kgf / c ² .
Pressing for 0 minutes, then hot pressing 4 ~
After pressing at 12 kgf / c ^{2 at} a temperature of 150 ° C. for 25 minutes, the pressure is released to cure, and the split piece laminate 15 having a thickness of 25 to 30 mm is completed.

FIG. 3 is a view showing one embodiment of an apparatus for manufacturing a split piece laminated material according to the present invention. In the drawing, 5 is a splitting device for splitting various raw materials cut to a predetermined length into a predetermined size and shape, and 7 is a splitting piece 6 sent from the splitting means 5 by a transporting means (not shown). A fine splitting device for forming fine split pieces 8 by further splitting finely, 9 is a drying device for the fine split pieces 8, 16 is a stocker, 17 is an adhesive application device, and is placed on a mesh belt conveyor 17a and an upper surface thereof. And a spray 17b for spraying an adhesive from both upper and lower directions of the divided split pieces 8 that are moved. Reference numeral 18 denotes a laminating means interposed between the mesh belt conveyor 17a and the conveying means 20, which advances and retreats in the arrow direction to cooperate with the movement of the belt conveyor of the conveying means 20 to form a single layer of a desired shape. It is formed and sequentially laminated to form the fine split mat 12. Reference numeral 21 denotes a cutting device that cuts the finely split piece mat 12 moved by the transporting means 20 to a predetermined length.
It has. Reference numeral 22 denotes a pressing means, which is constituted by a hot press or a high-frequency heating press, and heat-presses the fine split piece mat 12 to cure the adhesive and split the split piece laminated material 1.
5 is formed. Reference numeral 23 denotes a shaping unit which cuts the split piece laminated material 15 sent from the pressing unit 22 into a desired size and shape using a cro-cut saw 23a, a sizer 23b, and the like.

FIG. 4 is a front view showing the splitting device 5 and the fine splitting device 7, and FIG. 5 is a side view thereof.
Reference numeral 51 denotes a pair of rotary blades installed opposite to each other; 52, a motor as a drive source; and 53, a guide for feeding a raw material toward the rotary blade. FIG. 6 is a partial cross-sectional view of the rotary blade 51.
As shown in the figure, the rotary blade 51 includes a rotary cylinder 51a and circular blades 51b arranged in multiple stages at predetermined intervals around the entire circumference thereof. The rotary blade 51 shown in this figure is used for the splitting device 5, and the edge of the circular blade 51b is a double blade as shown in the figure. In this embodiment, the angle of the cutting edge which is a double blade is 20 degrees, and the height of the circular blade 51b, that is, the height from the rotary cylinder 51a to the cutting edge is 30 m.
m, and the interval between the circular blades arranged side by side is 10
mm. The pair of rotary blades 51, 51 are opposed to each other and rotate in opposite directions as described above. However, the cutting edges of the facing circular blades 51b are formed by the cutting edges of each other as shown in FIG. It is installed so as to protrude slightly into the gap.

The rotary blade 51 shown in FIG.
The edge of the circular blade 51b is a single blade as shown in the figure. In this embodiment, the angle of the cutting edge is 20 degrees, and the height of the circular blade 51b, that is, the height from the rotary cylinder 51a to the cutting edge is 7.5 mm. Is set to 4 mm. The pair of rotary blades 51, 51 are opposed to each other and rotate in opposite directions as described above, but the edge of the circular blade 51b facing the pair of blades is scissors as shown in FIG. Similarly, they come into contact with each other and cut off the object.

The operation of the manufacturing apparatus according to the above embodiment will be described. In this example, logs having a diameter of less than 50 mm were used as raw materials. First, the log A is cut into a length of 600 mm using a cross cut saw or a chain saw. Splitting device 5 having the above-mentioned rotary blade 51 for cutting log A
(See FIGS. 4, 5, 6, and 7)
A 0 mm split piece 6 is formed. Next, the split piece 6 sent to the fine splitting device 7 having the above-mentioned rotary blade (see FIGS. 8 and 9) is further split into smaller pieces to form a fine split piece 8 having a thickness of 4 mm and a width of 10 mm. . The fine split pieces 8 are dried with hot air in a drying device 9. The drying time is about 10 minutes at a temperature of 200 ° C.

After the drying step, the fine split pieces 8 are sent to an adhesive applying device 17 via a stocker 16 and coated with an adhesive. That is, the split pieces 8 are sprayed from both upper and lower directions while being conveyed by the mesh belt conveyor 17a.
The adhesive is applied by 7b. Next, the fine split pieces 8 are sent to the laminating means 18. As the split pieces 8 are sent out from the mesh belt conveyor 17a, the laminating means 18
Is advanced in the direction of the conveying means 20 by an arrow, and while laying the split pieces 8 on a belt conveyor capable of reciprocating the conveying means 20 in sequence, as shown in FIG. B1 and B2 are sequentially formed. Next, the conveying means 2
0 belt conveyor moves back and C1, C
The C single layer indicated by No. 2 and the D single layer such as D1 and D2 are further laminated on the C single layer in this order to form the fine split piece mat 12. At this time, as shown in FIG. The ends (joints) E, E, E of the layers are formed so as to be shifted from each other in the laminating direction. Although FIG. 10 shows the case where each single layer is formed so as to form a rectangle, each single layer may be formed as a parallelogram as shown in FIG. In order to form the parallelogram in this way, the parallelogram can be easily formed by moving the belt conveyor when feeding the fine split pieces 8 from the stacking means 18 to the transport means 20. In any case, the formation of the single layer and the loading of the single layer are performed by the adhesive applying means 1.
7. The operation is performed by the cooperation of the loading / unloading means 18 and the transportation means 20, and the operation required for each means is performed by a control means (not shown).

The split piece mat 12 is provided with the cutting device 2 described above.
After being adjusted to a predetermined length by 1, it is sent to the pressing means 22 and is heated and pressed to cure the adhesive. A split piece laminate is obtained by curing the adhesive. The thus obtained split piece laminated material is obtained by splitting a single layer in which fine split pieces formed by splitting wood, bamboo and other raw materials in the longitudinal direction are juxtaposed in the longitudinal direction in the horizontal and vertical directions. A plurality of single layers are joined, and a horizontal joint portion of each single layer is provided at a position separated from a joint portion of another layer overlapping with the layer having the joint portion in a laminating direction of the single layer, and each split piece is pressurized. In this state, it has a configuration solidified by an adhesive. In FIG. 3, the split piece laminated material 15 is sent from the pressing means 22 to the shaping means 23 and shaped into a desired shape.

Next, Test 1 relating to the performance of the split piece laminate obtained according to the present invention will be described. 12 to 15 are diagrams showing the results of specific gravity measurement, bending strength, and horizontal shear strength of the split piece laminate obtained under the following manufacturing conditions. Pressing conditions Cold press Pressing pressure: 6 kgf / c, pressing time: 10 minutes Hot pressing Pressing pressure: 4 to 12 kgf / c, Temperature: 150 ° C., Time: 25 minutes The split piece laminated material subjected to the test is: Thickness 25mm ~
30mm, width is 30mm, length is 600mm,
The raw materials for split pieces are cedar logs, cedar waste, willows, and bamboo.

FIG. 12 is a graph showing the results of the specific gravity measurement. From the results, it was found that the specific gravity significantly differs depending on the raw material. For cedar and willow, the specific gravity of lumber is about 1.5 times, and for bamboo, it is equivalent to the original specific gravity of bamboo.

FIG. 13 is a graph showing the measurement results of the bending Young's modulus. The flexural Young's modulus of the split piece laminate made of cedar or willow is almost the same, and the difference between longitudinal use (when loaded perpendicular to the pressing direction) and flat use (when loaded parallel to the pressing direction) Is less. This value is about 1.5 times the bending Young's modulus of the lumber product. In the case of Masatake, there is some difference between vertical use and flat use, but it is close to the original bending Young's modulus of Masatake.

FIG. 14 is a graph showing the measurement results of the bending strength. In any of the raw materials, there is no difference in bending strength between vertical use and flat use. The flexural strength of the split piece laminate made from cedar and willow is about three times that of cedar and willow lumber.

FIG. 15 is a graph showing the results of the horizontal shear strength test. The strength of the split piece laminate made from cedar and willow is close to the strength of the cedar and willow lumber products.

From the above test results, it can be seen that the specific gravity of the split piece laminated material using cedar and willow as the raw material is higher than that of the raw material.
Since defective portions such as nodes of the raw material are dispersed, it is found that the values of the bending Young's modulus and the bending strength are significantly higher than those of the raw material. This fact indicates that the split piece laminated material according to the present invention is a new material most suitable for structural members such as buildings requiring high quality performance, and the like. In the case of bamboo, since the specific gravity and performance of the bamboo itself are high, it is presumed that if the press pressure is increased to about 10 to 20 kgf / c, a higher performance than the bamboo itself can be realized by the split piece laminated material. You.

Further, Test 2 relating to the performance of the split piece laminate obtained by the present invention will be described. FIG.
FIG. 19 to FIG. 19 are diagrams showing the results of measurement of specific gravity, bending strength, and horizontal shear strength of the split piece laminate obtained under the following manufacturing conditions. Pressing conditions Cold press Pressing pressure: 6 kgf / c, pressing time: 10 minutes Hot pressing Pressing pressure: 4 to 12 kgf / c, Temperature: 150 ° C., Time: 25 minutes The split piece laminated material subjected to the test is: Thickness 25mm ~
50mm, width is 30mm, length is 600mm,
The raw material of the split pieces is a small diameter tree of willow having a diameter of 20 mm to 60 mm. And the hot press pressure is 4kg, 6kg, 8k
g and 12 kg were prepared and compared.

FIG. 16 is a graph showing the results of the specific gravity measurement. From the results, the press pressure was increased from 4 kgf /
It is found that the specific gravity increases as the weight increases to kgf /.

FIG. 17 is a graph showing the measurement results of the bending Young's modulus. The bending Young's modulus of each split piece laminated material shows a higher value for vertical use (when loaded perpendicular to the pressing direction) and for flat use (when loaded parallel to the pressing direction),
The bending Young's modulus increases with increasing pressure.

FIG. 18 is a graph showing the measurement results of the bending strength. Although the strength increases as the pressure increases, there is no difference in bending strength between vertical use and flat use.

FIG. 19 is a graph showing the results of a horizontal shear strength test. As the pressure increases, the strength increases, and a difference in strength between vertical use and horizontal use also occurs.

From the above test results, it is found that the strength of the product can be freely controlled by changing the pressure at the time of pressing in manufacturing the split piece laminate. Incidentally, when comparing the strength of the test material in test 2 and the strength of the willow lumber having the same size and shape as the test material, the split piece laminated material with 4 kgf / c was 1.
It has 5 times the strength, and in the following, 2 kg at 6 kgf / c
2.25 times for 8 kgf / c, 12 kgf / c
In this case, it becomes about 2.5 times.

By the way, in the split piece laminated material according to the present application,
A joint is formed between the ends of the split pieces in the longitudinal direction, and the strength of the product naturally increases when the joints are dispersed. 20 and 21 show the results of Test 3 in which the ratio of the bonded portion to the non-bonded portion was 0, 1/3, 1/2, and 2/3, respectively, in a cross section of the split piece laminated material. FIG. As shown in FIG. 20, no decrease in the bending Young's diameter is observed at 1/3 as compared with the case of 0, but it decreases by about 10% at 1/2 and about 20% at 2/3. In addition, as is apparent from FIG. 21, the influence of the joining portion appears more remarkably in terms of bending strength. That is, as compared with the case where the joint portion is 0, the bending strength is 10 to 20% at 1/3 and 1
In the case of / 2, it is reduced by about 30% and in the case of 、 ２, about 40-50%.

From the above Test 3, it is found that the dispersion of the above-mentioned joints in the split piece laminate has a very important significance. In the present invention, therefore, when a single layer in which split pieces are arranged in parallel is stacked as described above, the joining portions of the single layers adjacent to each other in the longitudinal direction are configured not to overlap in the stacking direction. In the case where the layers are laminated as shown in FIG. 11, the ratio of the above-mentioned joints can be suppressed to about 1/6, so that there is no fear of a decrease in strength.

By the way, the example in which the glass fiber cloth is stretched on the split piece laminated material according to the present invention to prevent the end portion from being cracked by nailing has been described above, and Test 4 concerning this will be described.
75mm in length and 3mm in diameter to the product with glass fiber cloth
When the nail was hammered, no crack occurred even if the nail was hammered at a position 6 mm from the end face of the product. Therefore,
In such a product, a simple joining means called nailing can be employed in a wide range.

In the above embodiment, the case where a hot press was used as the heating means at the time of pressing was described. According to the results of the experiment, the split piece laminated material could be used even if a high frequency heating press was used instead of the hot press. It has been found that the performance does not change, but the high-frequency heating method is effective for manufacturing thick products.

Next, the yield (yield) of the split piece laminated material according to the present invention with respect to a standing tree will be described. According to the experiment, assuming that the weight of the standing tree is 1000, the weight of the split piece laminate obtained therefrom was 460. However, one of Tachiki
Of the weight of 000, about 490 is generally moisture, bark, etc., so the substantial yield of split piece laminated material from a standing tree is about 90%, and if the product size is large, this figure is 2-3. %improves. Thus, the yield of the split piece laminated material according to the present invention is extremely high, and effective utilization of wood resources can be expected. By the way, lumber products, glued lumber, plywood pools are 50-60%, 30-40%, 60-7, respectively.
0%.

[0039]

As described above, according to the present invention, small-diameter / low-quality trees, discarded cuttings, scraps generated in the lumbering process, and construction wastes which have not been used before are all used without waste. And the yield of raw materials is extremely high, so that the effective utilization rate of forest resources can be greatly improved. In addition, by changing the pressing pressure in the manufacturing process, etc., or selecting various raw materials for split pieces, it is possible to produce products with various weight, lightness, hardness, strength and weakness and performances that can not be obtained with conventional wood materials as necessary. And can be easily realized. Furthermore, low-growth trees that grow quickly can be used in small diameters, which greatly contributes to the establishment of cultivated forestry.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first half of a manufacturing process of a split piece laminated material.

FIG. 2 is a perspective view showing the latter half of the manufacturing process of the split piece laminated material.

FIG. 3 is a perspective view showing one embodiment of an apparatus for manufacturing a split piece laminated material.

FIG. 4 is a front view of the splitting device in FIG. 3;

FIG. 5 is a side view of the same.

FIG. 6 is a cross-sectional view showing one embodiment of a rotary blade for producing split pieces.

FIG. 7 is a cross-sectional view showing an engaged state of the rotary blade.

FIG. 8 is a cross-sectional view showing one embodiment of a rotary blade for producing fine split pieces.

FIG. 9 is a cross-sectional view showing a meshing state of the rotary blade shown in FIG.

FIG. 10 is a perspective view showing a state in which a single layer is laminated by arranging fine split pieces.

FIG. 11 is a plan view showing a state in which a single layer formed by arranging fine split pieces is formed into a parallelogram and stacked.

FIG. 12 is a graph comparing the specific gravities of products manufactured from different materials.

FIG. 13 is a graph comparing bending Young's modulus of the same product.

FIG. 14 is a graph comparing bending strengths of the above products.

FIG. 14 is a graph comparing bending strengths of the above products.

FIG. 15 is a graph comparing horizontal shear strengths of the above products.

FIG. 16 is a graph comparing the specific gravities of products when the pressure at the time of pressing is changed using the same raw material.

FIG. 17 is a graph comparing the bending Young's modulus in FIG.

FIG. 18 is a graph comparing bending strengths in FIG.

FIG. 19 is a graph comparing horizontal shear strengths in FIG.

FIG. 20 is a graph showing that the bending Young's modulus differs depending on the dispersion state of the joining portion at the end of the fine split material.

FIG. 21 is a graph showing that the bending strength varies depending on the dispersion state of the joint portion at the end of the fine split material.

[Explanation of symbols]

 Reference Signs List 5 Splitting device 6 Splitting piece 7 Fine splitting device 8 Fine splitting piece 9 Drying device 17 Adhesive applying means 18 Laminating device 22 Heat pressing means

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) B27L 11/08 B27M 3/00 B27N 3/00-3/04

Claims (9)

(57) [Claims] 1. A method for producing a split piece laminate comprising the following steps. (A) cutting a raw material such as wood or bamboo into a predetermined length; (b) cutting the raw material cut into a predetermined length to have the predetermined length and a thickness of Amm. A step of obtaining a plate member having a predetermined width; (c) a splitting means in which a pair of rotary blades having circular blades provided in multiple stages around the rotary shaft are opposed to each other and the rotary blades are respectively rotated in opposite directions. To split the plate material along the fiber direction, and the cross section is Amm × Bmm (A
> B) obtaining a split material having a substantially square shape and having the predetermined length, (d) setting the split material in the same configuration as the splitting means, and setting the intervals between the circular blades provided in multiple stages. The fine splitting means, which is formed narrower than the splitting means, splits more finely along the fiber direction and has a rectangular cross section of Bmm × Cmm (B> C) and has the predetermined length and is extremely easily bent. A step of obtaining a split material, (e) a step of drying the split material, (f) a step of applying an adhesive to each of the dried split materials, and (g) a step of applying the adhesive. A step of forming a single layer in a mold having a desired shape and dimensions in parallel with each other in the longitudinal direction to form a single layer, and laminating the single layers into a plurality to obtain a fragment mat having the same shape as the mold; (h) A step of shaping the shredded mat by pressing with a cold press, (i) shaping A step of further pressing the obtained fragment mat by hot pressing to solidify the adhesive in a pressurized state; (j) curing the fragment mat in which the adhesive has solidified in the step, and laminating the split pieces; The process of obtaining the material. 2. The method for producing a split piece laminate according to claim 1, wherein a glass fiber cloth is inserted between the single layers to be laminated. 3. Thinned wood or other raw wood having a diameter of less than 25 mm,
Or a raw material such as bamboo, bamboo or the like shaped into a plate material having a thickness of less than 25 mm is conveyed by conveying means, a pair of rotary blades having circular blades provided in multiple stages all around the rotary shaft are opposed to each other, and the rotary blade is Each of them is conveyed to a splitting device that is rotated in the opposite direction to split the log and the raw material between the rotary blades to form a plate-shaped split piece having a predetermined length, thickness and width. Next, the plate-shaped split piece is conveyed to a fine splitting device which has the same configuration and operation as the splitting device and the interval between the circular blades provided in multiple stages is narrower than the splitting device, and is further finely divided here. Tear to a predetermined length, thickness,
It forms a very easily bendable split piece in the form of a plate having a width. The fine split pieces are conveyed to a drying device and dried with hot air. After the drying step, each of the split pieces is applied with an adhesive by spraying from both upper and lower directions while being conveyed by a mesh belt conveyor. The split pieces are then sent to laminating means consisting of a retractable belt conveyor.
As each of the split pieces is sent out from the mesh belt conveyor, the belt conveyor, which allows the stacking means to advance and retreat, advances in the direction of the transport means, and sequentially moves the split pieces into and out of the transport means. While laying on a conveyor, a single layer of fine split pieces is sequentially formed. Then, the belt conveyor of the conveying means moves back, and another single layer is sequentially laminated on each of the single layers, and further another single layer is further laminated thereon. To form a split mat that is approximately equal to the length of the mat. At this time, the ends (joined portions) of the single layers are formed so as to be shifted from each other in the laminating direction. The formation of a single layer and the loading of the single layer are performed by the cooperation of the adhesive application means, the loading means, and the transport means, and the operation required for each means is performed by the microcomputer. . The split mats are sequentially sent to the cutting device by the conveying means and adjusted to a predetermined length, and then sent to the pressing means, where they are heated and pressed to cure the adhesive. A split piece laminate is obtained by curing the adhesive. A method for continuously producing a split piece laminate material comprising the above steps. 4. The continuous production method of a split piece laminate according to claim 3, wherein a glass fiber cloth is inserted between the single layers to be laminated. 5. A single layer comprising a plurality of fine split pieces, such as wood and bamboo, which are finely split in the fiber direction so as to be easily bent, and which are arranged side by side in the fiber direction. Along with joining, the horizontal joining portion of each single layer is provided at a position separated from the joining portion of the other layer overlapping the layer having the joining portion in the laminating direction of the single layer, and each split material is provided with an adhesive. A split piece laminate that is solidified and bonded. 6. The split piece laminate according to claim 5, wherein a glass fiber cloth is inserted between the single layers to be laminated. 7. A means for forming thinned wood, wood waste, bamboo and other various woody raw materials into a plate having a predetermined thickness, a splitting device for splitting the plate and forming split pieces, and a transporting means for splitting the plate. A fine splitting device for forming fine split pieces by further splitting the split pieces sent from the apparatus, a drying device for the fine split pieces, and a stocker for storing the dried fine split pieces, Adhesive comprising a mesh belt conveyor and a sprayer for spraying adhesive from both upper and lower directions of the fine split pieces placed on the upper surface and moving to pull out the fine split pieces from the stocker and apply the adhesive. A coating device;
A laminating means adjacent to the mesh belt conveyor and capable of moving forward and backward itself, and receiving the fine split pieces from the laminating means moving upward and backward, forming a single layer of fine split pieces having a desired shape by cooperation with the laminating means. And a transporting means for forming the finely divided piece mat in which the laminated pieces are sequentially laminated, a cutting device for cutting the finely divided piece mat moved by the transporting means to a predetermined length, and curing the adhesive by hot-pressing the finely divided piece mat Pressing means for causing
Shaping means for cutting the fine split piece mat sent from the pressing means to obtain a final product having a desired size and shape.The splitting device and the fine splitting device are provided with a pair of opposing rotary blades, The rotary blade is provided with a drive source, and the rotary blade includes a rotary cylinder and circular blades provided in multiple stages around the entire circumference of the rotary cylinder, and each edge of the circular blade in one rotary blade is rotated in the other direction. A split piece stack, characterized in that the blades are slightly projecting between the cutting edges of the circular blades in the blade, and the intervals between the circular blades provided in multiple stages in the fine splitting device are formed narrower than the intervals in the splitting device. Material manufacturing equipment. 8. The rotary blade of the splitting device according to claim 7, wherein each of the circular blades has a cutting edge angle of 20 degrees, and each cutting edge interval is 10 mm, and the height from the rotary cylinder to the cutting edge is 30 mm. An apparatus for manufacturing a split piece laminated material. 9. The circular cutter according to claim 7, wherein each of the circular blades of the rotary blade of the fine splitting device is a single blade having a blade angle of 20 degrees, each blade interval is 4 mm, and the height from the rotary cylinder to the blade is 7 mm. An apparatus for producing a split piece laminated material, wherein the thickness is set to 0.5 mm.