JPH09272106A - Wood plate cutting method and manufacture of laminated material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lessen the curling and breakage of a split plate material by a method wherein a woody plate material is cut in the direction of the thickness with cutting blades arranged oppositely to the edge face of the woody plate material after the woody plate material is heat-treated. SOLUTION: A semi-hardboard 1 is heated and compacted under pressure for the pre-set period of time. After the elapse of the predetermined period of time, a hot platen 9b is moved upwards so as to be separated from the semi-hardboard 1 by means of a backward moving vertically moving member 11. At the same time, by rotatingly driving rolls 13a and 13b again, the semi- hardboard 1 is thrusted in between rotating needling rolls 21 and 23 so as to be conveyed to a cutting blade 29 side by a large conveying force developing with sticking blades 21a and 23a sticking into the front and rear surfaces of the semi-hardboard 1. As a result, the semi-hardboard 1 is cut into split plate materials bisected in the direction of the thickness with a cutting blade 29 acting over the whole direction normal to the direction of the thickness at the nearly middle position to the direction of the thickness with the conveying caused by the rotations of the sticking rolls 21 and 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for dividing and cutting a wooden board and a method for manufacturing a laminated material.

[0002]

The applicant of the present invention discloses that
As disclosed in Japanese Patent Publication No. 202401, a stationary type regulation member having a regulation surface and an elastically displaceable guide member having a guide surface are provided through a passage of a thick single plate between the regulation surface and the guide surface. Grooves are provided opposite to each other, and one of both members is provided with a groove portion of an appropriate width positioned at a predetermined interval in the direction orthogonal to the veneer traveling direction, and further in the rotational direction at a predetermined interval in the axial direction. A piercing transport roll having a number of lined piercing bodies and driven and rotated in the veneer traveling direction via a drive source is provided at a position where the piercing bodies reach the passage of the thick veneer through the groove portion. A divided blade having a shaped blade edge, the blade edge facing in the direction opposite to the veneer advancing direction is provided at a position facing the outlet of the passage of the thick veneer in a distributed manner, and the regulating member and the rotation drive of the puncture transport roll are provided. A single plate that is transported with the positional deviation restricted by a guide member One side was proposed to create a method and apparatus for flat single plate by the action of the cutting edge of the split blade in the traveling direction end face dividing cut the single plate in the thickness direction.

When a wood board, for example, a veneer is divided and cut in the thickness direction by the above apparatus, the dividing veneer deforms the divided veneer. However, the amount of deformation exceeds the elastic deformation range and a plastic deformation region or fracture occurs. It may reach the deformation region, and the divided veneer has a problem of curling and rolling or breaking.

When the divided veneer remains curled, it cannot be directly supplied to the post-treatment step, and
It takes a lot of time to supply it while stretching it flat,
It may break. In order to avoid this defect, it is necessary to extend the curled divided veneer into a flat shape by, for example, a known tender treatment method and supply the curled divided veneer. ,
The material yield is bad.

Particularly, in a fiberboard produced by curing wood fibers entwined with each other with an adhesive such as a thermosetting resin while applying pressure so as to have a predetermined thickness,
The above-mentioned drawbacks tend to appear significantly.

The present invention has been invented in order to solve the above-mentioned drawbacks, and the problem to be solved by the present invention is to reduce the curling or breakage of the divided plate material to be divided and cut into a post-treatment. It is intended to provide a method for dividing and cutting a wooden board material and a method for manufacturing a laminated material that can efficiently perform the above.

Another object of the present invention is to provide a method for dividing and cutting a wooden board and a method for manufacturing a laminated material, which can prevent the divided board from breaking and becoming unusable and improving the material yield. To do.

[0008]

For this reason, the invention of claim 1 increases the elastic deformation range of the wood fiber by heat-treating the wood plate material to be divided and cut. Then, when the wood board is divided and cut in the thickness direction by the dividing blade arranged so as to face the end surface of the heat-treated wood board, the divided board is deformed to be curved by the division blade, but by the heat treatment. Since the elastic deformation range of the wood fiber is large, the curling phenomenon is small.

According to the second aspect of the invention, the elastic deformation range of the wood fiber is increased by heat-treating the wood plate material to be cut into pieces in a state where water is attached. Then, when the wood board is divided and cut in the thickness direction by a dividing blade arranged so as to face the end surface of the water and the heat-treated wood board, the divided board is deformed so as to be curved by the dividing blade. The heat treatment increases the elastic deformation range of the wood fiber, reducing curling.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory view showing an outline of a method for dividing a wooden board.

FIG. 2 is a schematic perspective view showing an example of the split cutting device.

FIG. 3 is a vertical sectional view taken along line III-III in FIG.

In the present embodiment, a semi-hard board which is a kind of fiber board as a wood board material, also called a semi-hard fiber board (Medium-Density Fiberboard, hereinafter abbreviated as M)
DF), the method of dividing and cutting the MDF 1 is shown. A pair of upper and lower spray nozzles 5 are provided on the lower side in the transport direction of the first transport device 3 that transports the MDF 1 in the entire transport orthogonal direction. And each of the spray nozzles 5 has a plate detector (not shown) provided in the vicinity thereof.
After the front end in the transport direction of the MDF 1 transported by the transport device 3 is detected, while continuously detecting the MDF 1, the front surface and the back surface of the transported MDF 1 are sprayed with water in a spray direction over the transport orthogonal direction. To attach. The amount of water sprayed by the spray nozzle 5 over the entire front and back surfaces of the MDF 1 is about 200 cc (about 10 mm for one side when the MDF 1 is 900 mm in length and 1800 mm in width).
0 cc). The amount of water sprayed on the front surface and the back surface of the MDF 1 is approximately 200 to 400 c depending on the thickness of the MDF 1, the specific gravity (hardness), the type of wood fiber, and the like.
It may be determined in the range of c (about 100 cc to 200 cc for one side).

A heating and pressing device 7 is arranged on the lower side of the spray nozzle 5 in the conveying direction. The pressurizing and clamping device 7 is MDF
A pair of upper and lower hot plates 9 that are slightly larger than 1
The lower heating platen 9a is mounted at a height substantially equal to the transfer surface of the MDF 1 by the first transfer device 3, and the upper heating platen 9b is a vertical moving member such as a hydraulic cylinder. 11, the metal belt 15 described later
The MDF 1 placed on top and located on the upper surface of the lower heating plate 9a
Is clamped at a pressure of about 2 kg / cm ² . Also, each hot platen 9a
A heating member (not shown) such as a heating pipe or an electric heater for circulating steam is attached in 9b, and the heating plates 9a and 9b are heated to about 120 to 180 ° C. by the heating member.

Rolls 13a and 13b are provided on the left and right end sides (upper hand and lower hand in the conveying direction) of the lower heating platen 9a shown in the figure.
Are arranged so as to be rotationally driven at a peripheral speed substantially equal to the transport speed of the MDF 1 by the first transport device 3, and each roll 13
An endless metal belt 15 such as a stainless plate is stretched between a and 13b. Rolls 13a and 13b
The metal belt 15 traveling along with the rotation of the MDF 1 is moved to the upper surface side of the heating plate 9a from the first transfer device 3 and the MDF 1 is divided by heating plates 9a and 9b after heating and pressing. It is carried out to the cutting device 17. The MDF 1 conveyed by the metal belt 15 is heated by the heating plate 9
As a method of controlling rotation and stop of the rolls 13a and 13b positioned on the upper surface side of a, when the plate detector provided in the spray nozzle 5 detects the front end of the MDF 1 in the transport direction,
The rotation of the rolls 13a and 13b may be controlled and the counter (not shown) may be activated to stop the rotation of the rolls 13a and 13b when the counter measures a predetermined number of pulses.

The heating and pressing time of the MDF 1 by the heating plates 9a and 9b may be appropriately selected within the range of about 5 to 15 seconds.
That is, when the temperature of the heating plates 9a and 9b is low, the heating and pressing time may be lengthened, and when the temperature of the heating plates 9a and 9b is high, the heating and pressing time may be shortened. Is 2.
In the case of 7 mm MDF1, the temperature of the heating plates 9a and 9b is about 15
At 0 ° C, a time of at least about 5 seconds is required.

When the predetermined heating and pressing time has elapsed, the rolls 13a and 13b are rotationally driven again to heat and press the MDF 1, and the MDF 1 is divided into cutting pieces arranged on the lower side in the conveying direction of the pressing and pressing device 7. It is conveyed to the device 17.

An electric motor (not shown) is connected to a frame (not shown) of the division cutting device 17, and a pair of upper and lower drive shafts 19a for constantly rotating in the direction of the arrow (shown in FIG. 3) shown. 19b has an axis in a direction orthogonal to the transport direction of the MDF 1 and is supported so as to be rotationally driven. Each drive shaft 19a, 19b has a large number of piercing blades 2 on its outer circumference.
A large number of piercing rolls 21 and 23 having 1a and 23a are arranged at regular intervals in the axial direction, and piercing blades 21a and 23a
They are attached so as to be detented so that the mutual distance is slightly narrower than the thickness of the MDF 1. The mutual spacing between the piercing rolls 21 and 23 is set so that the thickness of the MDF 1 is, for example, about 1 to 2 mm when the thickness is about 2.7 mm.
It may be set within a range that can surely pierce the front surface and the back surface of F1 while preventing the piercing blades 21a and 23a from penetrating and apply the rotational driving force of the piercing rolls 21 and 23 to the MDF1.

On the frame located on the upstream side of the piercing rolls 21 and 23 in the conveying direction, a pair of upper and lower regulating members 25 are provided.
27 is located between the piercing rolls 21 and 23, and its tip is located on the lower side in the carrying direction with respect to the virtual vertical line L1 (shown in FIG. 3) connecting the axes of the drive shafts 19a and 19b, and the drive shaft 19a. -Fixed so as to face the horizontal imaginary line L2 (shown in Fig. 3) passing through the midpoint between 19b at an equal distance. The distance between the tips of the respective regulation members 25 and 27 is about 9 times the thickness of the MDF 1 to be divided and cut.
The distance is set to 0%.

A split blade 29 is fixed to the frame located on the carry-out side of the drive shafts 19a and 19b so as to face the carry-in side with the cutting edge positioned on the horizontal imaginary line L2. The divided blade 29 has a cutting edge angle of, for example, 24 degrees, and has a shape having cutting edge surfaces 29a and 29b inclined and inclined upward and downward with respect to the horizontal imaginary line L2.

On the unloading side of the drive shafts 19a and 19b, a pair of upper and lower peeling members 31 and 33 are fixed relative to the frame located between the piercing rolls 21 and 23, respectively. The tip of 33 is located near the dividing blade 29, and the piercing blade 2 of the piercing rolls 21 and 23
Abutting surface 31a that intersects with the rotational trajectory of the tips of 1a and 23a
33a. Incidentally, reference numeral 35 in FIGS.
Is a second connecting the pressure-pressing device 7 and the split cutting device 17.
It is a carrier device.

Then, the MDF 1 is divided and cut as follows.

When the MDF 1 placed on the first transport device 3 passes through a plate detector provided at the tip of the spray nozzle 5 along with the transport drive, water is sprayed from the spray nozzle 5 to the entire front and back surfaces of the MDF 1. Is sprayed in a spray form and the rolls 13a and 13b are rotationally driven to run the metal belt 15. Then, when the MDF 1 sprayed with water is transferred onto the traveling metal belt 15 and positioned on the upper surface side of the heating plate 9a, the rotation drive of the rolls 13a and 13b is interrupted to stop the conveyance, and then the vertical movement is performed. The moving member 11 is operated to move the heating platen 9b toward the MDF1 on the metal belt 15 located on the heating platen 9a, and the MDF1 is heated and clamped for a preset time. The wood fibers in the MDF 1 are softened by the heat associated with the heating and pressing by the hot plates 9a and 9b and the water that is vaporized by the heat and penetrates.

Next, when a predetermined heating and pressing time by the heating plates 9a and 9b elapses, the vertically moving member 11 which moves backward moves the heating plate 9b upward to separate it from the MDF 1 and the rolls 13a and 13b again. The MDF 1 is rotatably driven to plunge into the rotating piercing rolls 21 and 23, and the piercing blades 21a and 23a piercing the front surface and the back surface of the MDF 1 convey the MDF 1 to the split blade 29 side with a large conveying force. Then, the MDF 1 is divided into two in the thickness direction by the dividing blade 29 that acts on the entire MDF 1 in the direction orthogonal to the thickness at almost the middle position in the thickness direction as the piercing rolls 21 and 23 are conveyed. Is cut into pieces. At this time, since the MDF 1 is pressed so as to be compressed in the thickness direction by the restricting members 25 and 27 that come into contact with the front surface and the back surface of the blade immediately before the cutting edge of the dividing blade 29, the MDF 1 is divided by the dividing blade 29. Preventing the MDF1 from cracking first, each split plate material 1a.1
This prevents the cut surface of b from becoming rough. In addition, each of the divided plate materials 1a and 1b that have been divided and cut is a cutting edge surface 29a of the dividing blade 29.
It is deformed by 29b so as to be curved upward and downward respectively. As described above, since the wood fiber of MDF1 is softened by heat and water and its elastic deformation range is enlarged, the split plate members 1a and 1b are Curling,
It is less likely to break.

Divided plate material 1a divided and cut as described above
1b is the piercing blades 21a and 23a of the piercing rolls 21 and 23
After being conveyed to the carry-out side in a state of being pierced in the piercing state, the piercing roll 21 is brought into contact with the abutment surfaces 31a and 33a of the peeling members 31 and 33 that intersect the rotation locus of the tip of the piercing rolls 21 and 23. After being peeled off from 23, they are carried out by the respective conveying devices (not shown) provided at the respective peeling positions.

As described above, in this embodiment, since the wood fibers in the MDF 1 are softened by the attached water and heating and the elastic deformation range is increased, the cutting edge surface 29a is cut when the MDF 1 is divided and cut by the dividing blade 29. Most of the deformation of the split plate members 1a and 1b due to 29b can be within the increased elastic deformation range, and curling or breakage of the split plate members 1a and 1b can be reduced.

One of the divided plate members 1a and 1b of the MDF 1 obtained as described above, for example, the divided plate member 1a may be adhered to a plywood with an adhesive to form a laminated material. Further, a veneer plate may be adhered to the bonded divided plate material 1a for makeup to form a laminated material, and this laminated material may be used as a flooring (floor board), for example. In these cases, the surface of the divided plate member 1a on the divided side may be adhered to the plywood, but when the MDF1 is divided, the piercing blade 21 is formed on the surface of the MDF1.
Since a is pierced, a puncture mark may remain as a scratch on the surface of the divided plate member 1a on the punctured side, which may cause an aesthetic problem. In this case, the piercing blade 2 in the divided plate material 1a
The surface of 1a to be pierced may be adhered to a plywood to form a laminated material. When the divided plate material 1a and the protruding plate are bonded to the plywood, the divided plate material 1a and the protruding plate may be simultaneously bonded to the plywood to form a laminated material.

If necessary, one divided plate member 1a or 1b may be adhered to both front and back surfaces of a plate member such as plywood or LVL to form a laminated material.

In the above-mentioned embodiment, the MDF 1 which is heat-treated or heat-treated in the state of adhering moisture is divided, but depending on the kind of material, adhesive, etc. used for producing the MDF, curling may be performed even if divided. Sometimes the phenomenon is small. In this case, the MDF is not heat-treated or heat-treated in a state in which moisture is adhered, and is divided as it is to form a divided plate material, which is then adhered to the plywood as described above.
Further, a veneer plate may be adhered.

MDF is thin due to manufacturing problems,
Especially, the MDF with a thickness of about 1 mm is thicker than that.
Although the price is higher than that of the MDF, if the MDF having a relatively low thickness of 3 mm is divided in the thickness direction to have a thickness of about 1 mm as described above, a thin MDF can be obtained at low cost. be able to. Can be.

The present invention may be modified as follows.

(1). In the above description, the wooden board is MDF1.
However, in the present invention, the wood boards to be divided and cut may be fiberboards other than MDF, in addition to these, veneer (including both raw veneer and dry veneer), plywood, parallel plywood (LVL). Any board material containing wood fibers, such as paperboard, particle board, etc. may be used.

The case where the wood material is a veneer will be described in more detail. The veneer includes a softwood veneer and a hardwood veneer depending on the tree species. Among them, coniferous veneer has many voids as a structure, and therefore, when dried veneer having a water content of about 10% is heat-treated by the method of the present invention, bound water that greatly affects the physical properties of veneer is generated. The elastic deformation range becomes smaller and the range of elastic deformation becomes smaller. When divided and cut in this state, there is a tendency that curling cannot be suppressed despite the heat treatment. For this reason, for softwood veneers, undried veneers with a sufficiently high water content, for example, about 60% are used.
By heating the heating plates 9a and 9b heated to 0 ° C. for about 5 seconds to perform heat treatment, the elastic deformation range of the wood fiber can be
It can be enlarged so that curling does not easily occur during division cutting. In the dried softwood veneer, the elastic deformation range of the wood fiber can be increased by adhering water prior to the above heat treatment to increase the water content.

On the other hand, in the hardwood veneer, since there are relatively few voids as fibers and the bound water is less likely to decrease even with the dry veneer, it is only necessary to perform heat treatment without adhering water. The elastic deformation range of the wood fiber can be increased so as to reduce curling during division cutting.

Since the above-mentioned plywood and LVL are obtained by laminating and adhering each of the above-mentioned individual veneers, only the heat treatment or the water adhesion treatment prior to the heat treatment depending on the type of the laminated veneers. It suffices to carry out the above procedure and divide and cut.
Further, since the particle board has a structure similar to that of MDF, it may be divided and cut according to the processing method of MDF described above and described later.

(2). In the MDF 1 described above, water was attached by the spray nozzle 5 prior to the heat treatment.
Depending on the thickness, material, and specific gravity of DF1, only the heat treatment may be performed, and for example, the heat treatment at the temperature of the heating plate at 150 ° C. for 5 seconds can reduce the curling phenomenon.

(3) In the above description, water was sprayed onto the front surface and the back surface of the MDF 1 by the spray nozzle 5 so as to be adhered, but various kinds of water described in the above (1). The wooden board may be dipped in water to be attached.

(4) In the above description, the MDF 1 is heated by heating it with the heated heating plates 9a and 9b. However, the various wood board materials described in (1) above are used. If there is
Heat treatment may be performed by blowing heated air onto the front surface and the back surface for a certain period of time. As a specific example, as a wooden board material, 900 mm in length, 1800 mm in width, and 3 mm in thickness M
For DF, heated air at about 120 ° C for about 15 minutes,
By spraying and heat treatment, it was possible to cut into plate materials with less curling. Also, water adhesion and heat treatment may be performed simultaneously by blowing heated steam to the wooden board material.

(5) The heating temperature and time for the heat treatment of the wooden board differ depending on the type, thickness, specific gravity, etc. of the wooden board, and may be determined experimentally by the method according to the above-described embodiment. Further, the pressure at the time of clamping the wood board material during the heat treatment may be determined according to the thickness accuracy of the wood board material and the board material to be divided and cut.

(6). In the above description, the MDF 1 is performed by the divided blade 29 having the blade edge surfaces 29a and 29b in which the blade edge angle of the tip is equally distributed in the vertical direction with respect to the horizontal imaginary line L2.
Was divided into the divided plate materials 1a and 1b, but as shown in FIG. 5, one of the cutting edge surfaces 41a constituting the cutting edge is
The MDF 1 may be divided in the thickness direction by a dividing blade 41 that is inclined upward with respect to the conveying direction of the MDF 1 at a predetermined angle and has the other blade tip surface 41b formed in parallel with the horizontal imaginary line L2. MD using this dividing blade 41
When dividing and cutting F1 in the thickness direction, if only the upper surface of MDF1 is heated or water is adhered in advance and then divided and cut, the divided plate material 1a located above the cutting edge surface 41a.
Although it is deformed upward due to the inclination of a, the curling phenomenon is less than that of the above heat treatment, and the divided plate member 1b below is also curled.
Since the blade edge surface 41b is parallel to the horizontal imaginary line L2, the blade edge surface 41b is not greatly deformed, and the curl phenomenon is reduced. The cutting edge surfaces 41a and 41 of the split blade 41 are
b may be arranged opposite to the above.

(7). Even when the wood board is at least heat-treated and cut into pieces as described above, when some wood fibers in the cut pieces are plastically deformed and a curl phenomenon remains. There is. In this case, the divided plate material cut into pieces may be heated and pressed again by the hot plates 9a and 9b to be corrected into a flat shape.

[0043]

As described above, according to the present invention, it is possible to efficiently perform the post-treatment by reducing the curling or breaking of the divided plate material to be divided and cut. Further, the present invention can prevent the split plate material from breaking and becoming unusable, thereby improving the material yield.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an outline of a method of dividing a wooden board.

FIG. 2 is a schematic perspective view showing an example of a split cutting device.

FIG. 3 is a vertical sectional view taken along the line III-III of FIG. 2;

FIG. 4 is a vertical sectional view showing a divided cut state.

FIG. 5 is a vertical cross-sectional view showing a modified example of divided cutting.

[Explanation of symbols]

 1 MDF as wood board 7 Heating and pressing device 9a, 9b Hot plate 17 Dividing cutting device 29 Dividing blade

Claims (7)

[Claims] 1. A method of dividing and cutting a wooden board material by heat-treating the wooden board material and then dividing and cutting the wooden board material in a thickness direction by a dividing blade arranged opposite to an end face of the wooden board material. 2. A wood board is divided and cut in a thickness direction by a dividing blade which is disposed opposite to an end surface of the wood board after heat treatment with water adhered to the wood board. Method. 3. The method for dividing and cutting a wooden board according to claim 1 or 2, wherein the wooden board is a semi-hard board. 4. A method for producing a laminated material, wherein a semi-hard board is divided in a thickness direction by a dividing blade, and one of the obtained semi-hard boards is adhered to plywood with an adhesive to form a laminated material. 5. A semi-hard board is divided in the thickness direction by a dividing blade, one of the semi-hard boards obtained by the division is adhered to plywood with an adhesive, and then the veneer is adhered to one semi-hard board. A method for manufacturing a laminated material for forming a laminated material. 6. The method according to claim 4, wherein when one of the semi-hard boards obtained by dividing is adhered to a plywood, the surface of the semi-hard board on the divided side is adhered to the plywood to form a laminated material. Method for manufacturing laminated material. 7. A laminated material is formed by adhering one of the semi-hardboards obtained by division to a plywood, with the divided side of the semi-hardboard being the outside to adhere to the plywood. 5. The method for manufacturing a laminated material of 5.