JP2009073163A - Orienting and laminating device for wood chip and method of manufacturing oriented and laminated article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and a method for orienting and laminating wood chips in which the defect in the vertical direction orientation of the wood chips due to stagnation of the chips during the transportation the wood chips can be eliminated. <P>SOLUTION: The orienting and laminating device for wood chips comprises an orienting means for orienting the wood chips, which are mixed with a binder and continuously supplied from a supply means in a uniformalized state in a width direction, in the transporting direction of a transporting means; and the transporting means for transporting the wood chips in the state oriented by the orienting means while laminating the chips. The treatment for preventing slip of wood chips is applied to the transporting means or a device for performing such a treatment is additionally provided on the transporting means. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wood chip orientation laminating apparatus and a method for producing a wood chip orientation laminate when a wood chip is molded together with a binder to obtain a high-strength wood composite material.

  The wood chip mixed with the binder is aligned in the same direction as the fiber direction of the wood chip (the high strength direction of the anisotropic material), that is, oriented to form a wood-based mat, which is pressed or heated. It is known that a molded plate that has been fixed through a process and the like has dramatically improved its mechanical strength and physical strength in the fiber direction, such as LSL (Laminated Strand Lumber) and PSL ( Some of them can be used as structural materials, such as parallel strand lumbar.

  As a wood chip orientation device, various devices have been devised in which a wood piece is naturally dropped and passed between orientation plates. For example, a device that orients a wooden chip by arranging a plurality of disks on the same axis at regular intervals and passing the wooden chips between the disks while rotating the disks, or a plurality of plates arranged in parallel And the wood chips are oriented by passing between the plates that reciprocate in opposite directions.

  However, in these devices, the wood chips are arranged in one direction in the same plane in the vertical and horizontal directions by the orientation plate, but the vertical direction is difficult to be oriented due to natural fall.

  As a device for reducing wood chips that are not oriented due to natural fall, a wood chip supply means mixed with a binder, an orientation means for orienting wood chips mixed with a binder supplied from the supply means, and a binder An orientation laminating apparatus and an orientation laminating method are proposed, in which wood chips mixed with each other are laminated in a mat shape on the upper surface in an oriented state through the orientation means, and a transport means for transporting the laminated laminate mats. (For example, refer to Patent Document 1).

  In the orientation laminating apparatus and the orientation laminating method, since the orientation gap formed between the orientation plates has no bottom plate, the wood chips put into the orientation gap are vertically and horizontally. While being arranged in one direction in the same plane, it falls directly onto the conveying means and is also oriented in the vertical direction while being conveyed.

JP 2005-53215 A

  However, in this orientation laminating apparatus and orientation laminating method, the wood chips thrown into the orientation gap often stay during transportation, and the orientation in the vertical direction is often insufficient.

  An object of the present invention is to provide a wood chip orientation laminating apparatus and a wood chip orientation laminated body manufacturing method that solves the problem of the orientation in the vertical direction accompanying the stay during the transportation of the wood chips. It is.

  As a result of intensive studies to solve the above problems, the inventors of the present invention in the above-described conventional wood chip orientation laminating apparatus and orientation laminating method, the wood chips introduced into the orientation gap contact the orientation plate on the side surface, Because it is transported while receiving resistance, it is easy to slip during transport, and this is the cause of stagnation, and the above problem can be achieved by applying anti-slip treatment of the wood chip during transport Based on the finding and this finding, the present invention has been made.

  That is, according to the first invention of the present invention, the orientation means for orienting the wood chips mixed with the binder continuously supplied from the supply means in the state of being uniform in the width direction in the transport direction of the transport means; A wood chip orientation laminating apparatus comprising a wood transporting means for laminating and transporting wood chips oriented by the orientation means, wherein the wood chip is subjected to a non-slip treatment, or wood There is provided a wood chip orientation laminating apparatus characterized in that it is provided with a device for applying a chip anti-slip treatment.

  According to the second invention of the present invention, in the first invention, the plurality of alignment plates in which the alignment means is erected substantially parallel to the conveyance direction of the conveyance means so as to form an alignment gap therebetween. There is provided a wood chip orientation laminating apparatus characterized by comprising vibration imparting means for imparting vibration to the orientation plate.

  Further, according to a third invention of the present invention, in the first invention, the alignment means is a bowl-shaped portion provided with inclined alignment grooves to be a plurality of alignment portions arranged in parallel in the width direction; Provided is a wood chip orientation laminating device comprising vibration applying means for applying vibration to the bowl-like portion, and a plurality of orientation plates provided on the downstream side of the bowl-like portion and at the position of the upper end of the conveying means. Is done.

  According to the fourth aspect of the present invention, the wood chip mixed with the binder continuously supplied from the supply means in a state of being uniformed in the width direction is oriented in the transfer direction of the transfer means and then transferred. A method for producing a wood chip orientation laminate in which oriented wood chips are laminated on a means to form a laminated mat, and the laminated mat is transported, the wood means being subjected to anti-slip treatment on the transport means A method for producing a featured wood chip oriented laminate is provided.

  According to a fifth aspect of the present invention, there is provided a method for producing a wood chip alignment laminate, wherein, in the fourth aspect, the binder is a tannin-based binder.

  According to a sixth aspect of the present invention, there is provided a method for producing a wood chip oriented laminate, wherein in the fifth aspect, the anti-slip treatment is performed using a tannin-based binder.

  According to the orientation laminating apparatus of the present invention, the wood chip is retained on the transport means because the transport means is subjected to the anti-slip treatment of the wood chips or an apparatus for performing the anti-slip treatment is attached. It can fully orientate in the up and down direction.

  In addition, according to the manufacturing method of the present invention, the wood chip is subjected to the anti-slip treatment on the transport means, so that the wood chip is sufficiently oriented in the vertical direction without staying on the transport means to form a laminated mat. Thus, a wood chip oriented laminate can be obtained.

In the present invention, the orientation refers to a state where an average value (also referred to as an average orientation angle) of an angle formed by the direction of the reference line and the long axis direction of the wood chip is within a range of ± 25 degrees. That is, the length direction of the wood chips is almost aligned when passing through the orientation gap, but if the average orientation angle exceeds 25 °, the orientation is insufficient, and a wood-based composite material having the required strength can be obtained. There is a risk of disappearing.
The direction of the reference line refers to a direction along the transport direction, and coincides with the length direction of the obtained wood-based composite material.
The average orientation angle can be calculated by taking an image of the surface state after stacking the wooden chips, measuring the angle formed by the long axis direction of the elongated wooden chip and the reference line, and averaging the measured values.

  As the conveying means used in the orientation laminating apparatus of the present invention, the wood chips mixed with the binder are laminated in a mat shape on the upper surface in an oriented state through the orientation means, and a laminated mat is formed. Although it will not specifically limit if it conveys, Preferably the call board etc. which were set | placed on the belt conveyor and the belt conveyor or the roller conveyor are mentioned. The term “coal plate” refers to a metal plate having a predetermined size such as stainless steel, iron, or aluminum, on which a wood chip oriented and laminated is placed and a wood laminate mat is conveyed.

This conveying means is provided with a wood chip anti-slip treatment or a device for carrying out the wood chip anti-slip treatment.
Non-slip treatment includes natural rubber, isoprene rubber, isobutylene rubber, styrene-butadiene rubber, polyisoprene rubber, acrylic rubber such as polyacrylate ester and acrylate ester copolymer, silicone resin, starch paste Application of adhesives such as adhesives such as polyvinyl acetate and polyvinyl alcohol and adhesives such as tannin adhesives, spraying or spraying, adhesion of rosin and rosin derivatives, polyterpene resins, terpene phenol resins, petroleum resins, etc. Application of application resin, surface-roughening treatment, uneven processing to give grooves, protrusions, etc., for example, striping processing, expanding processing, punching processing, etc. in striped steel plate, expanded metal, punching metal, etc., nonwoven fabric and knitting Examples include pasting of woven fabrics such as glass cloth It is. In addition, a polymer material such as tannin can also be used because adhesive force is generated by adjusting the use temperature or by forming a solution.
Examples of the device for performing the anti-slip treatment include those capable of continuously performing the anti-slip treatment in-line, such as a spray applicator and a roll coater.

The wood laminate mat laminated on the conveying means is usually conveyed to a molding machine by the conveying means, and is pressed and / or thermoformed to form a wood-based composite material having a desired thickness.
The heating method is not particularly limited. For example, a method of transferring heat from the surface of the wood chip to the inside by heat transfer like a hot plate, a method of directly heating the inside such as steam injection or high frequency heating, etc. Can be mentioned.

The orientation means used in the orientation laminating apparatus of the present invention is not particularly limited, and a plurality of orientation plates are erected substantially parallel to the transport direction of the transport means so as to form an alignment gap therebetween, It is preferable to add vibration imparting means for applying vibration to the alignment plate, and more preferably, a plurality of alignment plates form an equally spaced alignment gap between adjacent alignment plates. It is particularly preferable that the orientation plates are connected to each other so as to vibrate together.
The method of connecting the orientation plates is not particularly limited, but a method that does not prevent the wood chips from falling in the orientation gap, for example, the upstream upper end or the downstream upper end of the orientation plate constituting the orientation means, For example, a metal plate such as a strip-shaped iron plate may be connected by welding or the like.

As other orientation means, a hook-like part provided with a plurality of orientation grooves arranged in parallel in the width direction in an inclined manner, a vibration applying means for applying vibration to the hook-like part, and the hook-like part And a plurality of alignment plates provided at the position of the upper end of the conveying means on the downstream side of the unit.
The cross-sectional shape of the orientation groove is not particularly limited, and examples thereof include a substantially V-shape, a substantially U-shape, and a substantially bowl shape, and a cross-sectional shape that converges downward such as a substantially V-shape and a substantially U-shape. Is preferable in consideration of the orientation.
The orientation plate is intended to prevent the disturbance of orientation when transferring the wood chip from the bowl-shaped part to the conveyor, and preferably has a friction coefficient as small as possible and a lightweight one. Examples include plastics.

  In order to obtain a high-strength wood composite material, there is a more preferable relationship between the size (width) of the orientation gap and the thickness of the wood chip. For example, the thickness of the wood chip is 1 mm to 11 mm. In this case, the alignment gap is preferably 20 mm to 40 mm. When the thickness of the wood chip is 3 mm to 5 mm, the alignment gap is preferably 15 mm to 30 mm. That is, if the size of the alignment gap becomes non-uniform beyond this range, the strength of the obtained wood-based composite material may vary. If the average orientation angle is to be made smaller, the orientation gap may be made smaller. However, although depending on the aspect ratio of the wood chip, if the gap for orientation is 15 mm or less, a wood laminate mat having an average orientation angle within ± 10 ° can be obtained, but the wood chip is clogged in the gap for orientation. It becomes easy.

  In order to obtain a wood-based composite material having uniform physical properties, it is desirable that the alignment gaps be equally spaced. If all the orientation gaps have the same size, the degree of orientation in the wood chips for each orientation gap is almost the same, and therefore the effect of reducing the variation in strength of the obtained wood-based composite material is increased.

  The orientation laminating apparatus is provided with vibration applying means for applying vibration to the alignment plate, but the attaching method of the vibration applying means is not particularly limited as long as it does not affect the insertion of the wood chip. For example, when a plurality of alignment plates as described above are connected by a metal plate or the like, they may be attached to the metal plate or attached to the outermost alignment plate. Further, the vibration applying means is not particularly limited, but it is preferable that the vibration, the vibration frequency, or the vibration direction is variable and the optimum vibration condition can be selected according to the situation.

The amplitude or frequency of the vibration applied by the vibration applying means is such that when the wood chip falls in the alignment gap, and falls and is oriented and stacked on the conveying means, it slides and dances again. It is sufficient that the orientation is not disturbed, and it may be selected and determined as appropriate depending on the amount, properties, size, etc. of the supplied wood chips.
The vibration direction is a direction in which the wood chip is desired to be conveyed, and the vibration is vibrated obliquely upward from the horizontal direction. When the alignment plates connected by the vibration of the alignment plates vibrate, and the wood chips mixed with the binder are introduced into the alignment gaps from the upper front side along the traveling direction of the conveying means, The wood chip straddled across the top of the alignment plate slides on the top edge of the alignment plate and moves in the conveying direction while flapping, and at the same time, the center of gravity shifts, falls off the top edge of the alignment plate and falls between the alignment plate and the alignment plate. It falls into the alignment gap and is laminated on the conveying means through this alignment gap.

  The wood chips that have fallen into the alignment gap fall while the length direction thereof is regulated by the alignment plate that forms the alignment gap, and are aligned in a state in which the length direction is substantially aligned along the transport direction. That is, when the wood chip falling into the alignment gap and in contact with the alignment plate is vibrated, the wood chip is moved by vibration due to friction with the alignment plate, and its posture can be easily changed. Therefore, the orientation is easily performed. Furthermore, by receiving vibration, the wood chip whose length direction is oriented in the vertical direction is likely to fall down in the horizontal direction, and the friction force between adjacent wood chips is also reduced, and the wood chips are caused by each other. Bridging is unlikely to occur and orientation is facilitated.

  In addition, if the alignment plate is not vibrated, the wooden chips that fall on the conveying means through the alignment gaps and are oriented and laminated may be clogged by friction with the alignment plate, and the wooden laminated mat on the conveying means. May become discontinuous due to cracking, or the laminated thickness may not be increased. However, by applying vibration, the friction between the wood chip and the orientation plate is reduced, which can be prevented.

  Even when the long wooden chips are stacked, if the vibration is received from the alignment plate, the posture may change and the alignment may proceed. That is, at the moment when the wood chip floats slightly in the air due to vibration, it collides with the adjacent slender wood chip on the top, bottom, left and right or front and back so that the major axes of the collided wood chips are aligned. You may change your posture. When this is repeated, the wood chips may be gradually aligned in the long axis direction.

  It is preferable that the vibration applied to the alignment plate is a vibration obliquely upward in the transport direction of the transport means. Such vibration is, for example, at a conveyance speed of 0.2 to 3 m / min and an average orientation angle (an average value of an angle formed by the major axis direction of the wood chip and the conveyance direction of the wood laminate mat) is 10 to 25 °, When obtaining a wood laminate mat having a stacking height of 30 to 100 mm, the angle of vibration is about 15 ° to 75 ° in the transport direction of the transport means, even if the stacking height is increased. This is preferable because the possibility that the wood chip is likely to be clogged in the alignment gap is reduced.

  In the orientation laminating apparatus, the orientation means preferably has a plurality of orientation plates erected in parallel so as to be substantially parallel to the transport direction of the laminate mat transport means, and the upper edge of the orientation plate is inclined. More preferably. That is, the slender wooden chip laid on the alignment plate becomes easy to slide along the inclination of the upper edge of the alignment plate due to the vibration of the alignment plate, partly falls in the alignment gap, and partly below the inclination It moves along the upper edge of the orientation plate while sliding or moving toward it. Therefore, it is not hindered that the wood chips to be input next fall smoothly into the alignment gap, so that the wood chips are more easily and smoothly oriented and laminated on the conveying means. The inclination is provided so that the fallen wood chip does not stay in the same place on the upper edge of the orientation plate and collide with the fallen wood chip and prevent the fall. In addition, by vibrating the alignment plate, the wood chip placed on the upper end side of the alignment plate becomes slippery and can change its position.

  And when applying vibration to the orientation plate diagonally forward and forward in the transport direction of the transport means, in particular, since the force to fly the wood chip in the same direction is applied, the inclination of the upper edge of the orientation plate so as not to hinder the movement of the wood chip It is better to have a downward slope toward the downstream side in the transport direction of the transport means, but even as an upward slope in the transport direction, as long as it can fall along the slope due to vibration and the wood chip can change its position No problem.

The alignment laminating apparatus has a gap between the lower end of the alignment plate and the conveying means, and this gap does not contact the conveying means due to vibration at the lower end of the alignment plate, and at least the upstream end of the conveying means is free of the binder. It is preferable that the mixed wood chips are formed in a size incapable of passing.
In addition, the wood chips that are classified and have their thickness and length averaged to some extent are used, but some wood chips that are thinner or finer than the standard are also included. There is a case. Therefore, the “size in which a wood chip cannot pass” in the present invention does not mean that a wood chip having a thickness thinner than the reference or a fine wood chip cannot pass.

  That is, although it depends on the amplitude of vibration of the orientation plate, the gap between the orientation plate lower end of the orientation device closest to the upper surface of the transport means and the transport means is preferably about 1 to 5 mm. If this gap is less than 1 mm, the upper surface of the conveying means and the lower end of the aligning plate may come into contact with each other due to the vibration of the alignment plate, and the conveying means may be damaged. There is a possibility that the orientation of the spilled portion or the portion (corresponding to the bottom of the product) is disturbed due to the rotational moment generated at the time of dropping because the orientation of the wood chip is not regulated by the orientation plate. Note that, on the downstream side in the transport direction of the transport means, the wood chips are stacked on the wood chips stacked on the upstream side, so the gap may be 5 mm or more.

Explaining woody chips, the tree species mainly include conifers such as cedar, cypress, spruce, fur, and radiatapine, and broadleaf trees such as birch, apiton, chamelere, sengonlaut, and aspen. It can include not only plant materials that are produced, but also plant materials that are produced outside forests, such as bamboo and sorghum.
Forms that can be used as raw materials are not particularly limited, but include, for example, the above logs of logs, raw materials such as thinned wood, scraps generated at factories and residential construction sites, waste pallet materials discarded after transportation of materials, and construction Examples include demolition waste materials generated during dismantling.

  The processing method for converting the raw material into a wood chip is a method of cutting a veneer processed by a rotary cutter into a chopsticks shape to make a stick, a method of cutting a log with a rotary blade of a flaker into a strand, a uniaxial crusher A method of crushing wood by rotating a roll with a blade on its surface can be used. If the wood chips crushed as described above are uneven in thickness, they are classified into a certain range of wood chips as needed. Although it will not specifically limit if it can classify, For example, the method of classifying using classifiers, such as a wave roller system, is mentioned. The wave roller type classifier is a device that performs continuous classification based on the thickness of the chip.

In the present invention, a wood chip mixed with a binder is usually one that is applied and sprayed before lamination to adhere the binder to the wood chip or a mixture of the binder and the wood chip. .
Examples of the binder include tannin-based, phenolic resin-based, urea-resin-based, isocyanate-based adhesives for the wood industry used for plywood and particle board. These binders can be used alone or in combination of several kinds. Also good. In addition, the binder may be in a liquid or powder form, but in the case of a liquid, it is generally sprayed onto a wooden chip, or is stirred and mixed with a wooden chip and supplied to the orientation laminating apparatus in a state of being supported on the wooden chip in advance, In the case of powder, it is generally supplied to the orientation laminating apparatus in a state of being uniformly mixed with the wood chip.

  Further, the wood chip preferably has a constant moisture content. By making the moisture content constant, the quality variation of the wood-based composite material during production is eliminated. A preferable water content is 0 to 30%. As a method for keeping the moisture content constant, for example, there is a method in which a wood chip is left in a temperature-controlled oven for a certain time. Incidentally, when left in an oven at 50 ° C. for 24 hours, the water content is maintained at about 5%.

The wood chip is preferably a chip having an elongated shape, and further a chip in which the fiber direction of the tree is the same as the length direction, and the thickness and width are both 0.1 mm or more and there is no particular upper limit, It is preferable to set it to 1/5 or less of the thickness of the wood type composite material manufactured. The length is preferably at least 5 times the dimension of the larger width or thickness. However, in order to improve the appearance of the product, a wood chip of 0.1 mm or less may be arranged on the surface side.
The wood laminate mat obtained by the oriented laminating apparatus and the oriented laminating method of the present invention is not particularly limited, but is a wood based composite material suitable as a structural material or furniture material by performing at least one of heating and pressing in the laminated state. However, the obtained wood-based composite material is preferably subjected to annealing treatment, cutting, and sanding processing in order to improve the dimensional accuracy and surface properties after molding.

  The method for producing an oriented laminate of wood chips of the present invention is a method of orienting a wood chip mixed with a binder continuously supplied from a supply means in a state of being uniformed in the width direction in the carrying direction of the carrying means. A method of laminating wood chips in an oriented state on a means to form a laminated mat and conveying the laminated mat, characterized by applying a non-slip treatment of the wooden chips to the conveying means.

  In this method, as the binder mixed with the wood chip, those described in the above-described orientation laminating apparatus of the present invention are used, but preferably a tannin-based binder is a natural resource, and a conventional phenol resin, It is recommended because it is a material that is superior to petroleum-based materials such as melamine resin, urea resin, and isocyanate resin, and is safer to the human body. Further, when a tannin-based binder is used, the anti-slip treatment of the present invention is recommended because the wood chips are likely to stay on the conveying means unless the conveying means is subjected to the anti-slip treatment of the wooden chips.

  In this method, the anti-slip treatment of the wood chip applied to the conveying means is performed as described in the orientation laminating apparatus of the present invention, but it is preferable to use a tannin-based binder. This is recommended because there is little variation in the quality of the resulting alignment laminate.

Further, in this method, the wood chip mixed with the binder is oriented so as to vibrate a plurality of orientation plates standing substantially parallel to the transport direction of the transport means and forming an alignment gap. The wood chip is supplied to the means from the supply means, or a hook-like part provided with inclined orientation grooves serving as a plurality of orientation parts arranged side by side in the width direction, and the hook-like part vibrates. Supplying the wood chip from the supply means to the orientation means provided with vibration imparting means for providing a plurality of orientation plates provided downstream of the bowl-shaped portion and at the position of the upper end of the transport means It is preferred to do so.
Further, in this method, the gap between the lower end of the orientation plate and the transport means is such that the lower end of the orientation plate does not contact the transport means by vibration, and the wood chip mixed with the binder is at least at the upstream end of the transport means. It is preferable that the size is formed so as not to pass, and it is preferable to use a long and slender wood chip so that the longitudinal direction of the wood chip is oriented in the transport direction of the transport means.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an example of the wood chip orientation laminating apparatus of the present invention.

  The orientation laminating apparatus 1 of the present invention is composed of a wood chip supply means 2, an orientation means 3, and a transport means 6. A plurality of orientation devices 3 (in this embodiment, seven metal orientation plates 31, 32,..., 37 are erected in parallel along the transport direction, and the orientation plates 31 (32,..., 36) and An alignment gap 41 (42,... 46) is formed between the alignment plates 32 (33,..., 37) The ends of the plurality of alignment plates 31, 32,. The metal plate 51 is connected by welding, and a vibrator 52 as vibration applying means is attached to the metal plate 51.

  The upper end edges of the alignment plates 31, 32,..., 37 are inclined to be gradually lowered toward the transport direction. Further, a gap is provided between the lower ends of the orientation plates 31, 32,..., 37 and the upper surface of the anti-slip treated call plate 61 placed on the belt conveyor 6. Even when the vibration is applied to the alignment plates 31, 32,... 37 by a vibration applying device 5 to be described later, the lower ends of the alignment plates 31, 32,. .., 37 at least on the upstream side in the transport direction of the orientation plates 31, 32,... The size is such that P does not spill out of the call board 61. Moreover, as shown in FIG. 2, the gap K between the alignment plates 32, 33,... 36 and the call plate 61, excluding the alignment plates 31 and 37 at both ends in the width direction, is at least an end portion on the upstream side in the transport direction. The gap k1 is sized so that the wood chip P does not spill out of the call board 61 and gradually increases toward the downstream side in the transport direction. Further, the alignment plates 31 and 37 at both ends in the width direction have the same gap K between the lower end and the call plate 61 from the upstream to the downstream in the transport direction, and are laminated on the call plate 61 by vibrations or the like. Is designed to prevent crumble.

  The vibration imparting means 5 is a support that supports the vibrator 52 and the entire orientation laminating apparatus 1 on the support portion 54 on the metal plate 51 provided across the two orientation plates 31 and 37 on both sides of the orientation means 3. A spring 53 is included. In the case of this oriented laminating apparatus 1, the support springs 53 are provided at the four corners of the oriented laminating apparatus 1, but the number and the support position or the support method are not particularly limited, and the oriented laminating apparatus is stable. Any method can be used as long as it is configured to vibrate, and it is only necessary to select and design a suitable method according to the situation depending on the weight, size, or center of gravity position of the device. is there.

  The conveyor direction of the belt conveyor 6 is parallel to the orientation plates 31, 32,. Further, the wood chip P supply device 2 is disposed at the upper end of the alignment plates 31, 32,.

The supply means 2 includes a belt conveyor 21 and a leveling roller 22 provided with a plurality of ring-shaped ridges 23 parallel to the surface thereof.
Next, the movement of the wood chip orientation laminating apparatus using this orientation laminating apparatus 1 will be described in detail.

  The steps of the method for manufacturing a wood chip used in the orientation laminating apparatus of FIG. 1 are shown in FIGS. FIG. 3 is a schematic diagram for explaining the step of classifying the crushed wood chips, FIG. 4 is a step for adjusting the moisture content in a constant temperature and humidity chamber, and FIG. 5 is a schematic diagram for explaining the step of mixing the binder.

  That is, first, as shown in FIG. 3, a crushed wood chip P1 obtained by pulverizing or cutting waste wood with a pulverizer or a cutting machine (not shown) is classified into a classifier 7 (in this example, a wave roller system). And classifying wood chips P2 having a thickness of 1 to 11 mm and a length of 1 to 15 cm.

  Next, as shown in FIG. 4, the wood chip P2 is placed in a constant temperature and humidity chamber 8 maintained in an atmosphere of a temperature of 40 ° C. to 110 ° C. and a relative humidity of 1% to 60% and left for 12 hours or more, After obtaining the adjusted wood chip P 3, as shown in FIG. 5, it is put into the drum blender 9, the binder 10 is sprayed onto the wood chip P 3 in the drum blender 9, and the wood chip P 3 in the drum blender 9 is sprayed. A wood chip P with a binder is obtained by supporting the binder 10 on the surface.

  Then, the wood chip P with the binder obtained in this way is placed on the belt conveyor 21 of the supply device 2 and the leveling roller 22 is used to place the wood chip with binder on the belt conveyor 21 as shown in FIG. The chips P are continuously supplied to the alignment gaps 41, 42,... 46 of the alignment apparatus 3 while keeping the thickness of the chips P substantially constant. In the aligning device 3, the alignment plates 31, 32,... 37 of the aligning device vibrate by the vibration applying means 5, and the wood chip P with the binder laid on the plate by this vibration becomes the alignment gaps 41, 42. ,..., 46, and stacked on the call board 61 while being oriented by the orientation gaps 41, 42,.

  The vibrator 52 may be attached anywhere on the orientation device 3, but it goes without saying that the center of gravity must be balanced so that abnormal vibration and residual vibration do not occur in the entire device 3. The vibration direction is preferably upward from the surface of the belt conveyor 6 and obliquely upward and forward from the downstream direction (MD) in the conveying direction of the belt conveyor 6. Further, the angle may be appropriately changed according to the supply amount, the linear velocity, and the like. Further, the orientation device 3 is provided with a support spring 53 for supporting the vibrating orientation device 3 as a whole on a support base 54.

  The wood chip P dropped while maintaining the orientation state is received directly on the upper surface of the call board 61 or on the wood chip P previously placed on the call board 61, and a wood laminate mat M having a predetermined thickness. The wood laminate mat M is conveyed toward the press device (not shown) by the belt conveyor 6. Finally, the wood-based composite material is obtained by press-molding the wood laminate mat M that has been sent by a press device.

  As described above, if this orientation laminating apparatus 1 is used, there is no bottom plate as in the conventional orientation apparatus. Therefore, it becomes possible to obtain a wood laminate mat M having a thick wood chip P, which is continuously long. A thick wood-based composite material can be obtained. Further, since the orientation plates 31, 32,... 37 vibrate, the wood chip P with the binder becomes a plate and a plate, for example, the orientation plate 31 (32,... 36) and the orientation plate 32 (33,... 37). Without being clogged with a bridge phenomenon or the like, and smoothly falls in the alignment gaps 41, 42,.

  The present invention is not limited to the above embodiment. For example, as in the above embodiment, the entire orientation device 3 is suspended by a spring other than the method of providing the side reinforcing plates of the orientation plates 31, 32, 33,... And attaching the vibrator 52 directly thereto. It may be lowered (not shown).

In the above embodiment, a belt conveyor is used, but a roller conveyor may be used. In the above embodiment, the wood chip P is received on the call board placed on the belt conveyor 6, but the wood chip P may be received directly on the conveyor.
Also, even if the lower end of the outermost alignment plates 31 and 37 comes into contact with the belt conveyor, the lower end of the polypropylene sheet or the soft rubber sheet that does not damage the belt conveyor is substantially in contact with the belt conveyor. You may make it provide in a skirt shape. In this way, it is possible to more reliably prevent the wood chips from spilling from the belt conveyor.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, contrasting with a comparative example, this invention is not limited at all by these examples.

Example 1
First, a board wood material piece P1 purchased from a wood waste disposal contractor is classified using a wave roller type classifier 7 (wave roller screen, manufactured by Taihei Co., Ltd.), and a wood chip P2 having a thickness of 1 to 8 mm. Were collected. This wood chip P2 was allowed to stand in a heating oven 8 having an atmospheric temperature of 50 ° C. for 24 hours, and the water content was adjusted to a water content of 5.2% by weight to obtain a wood chip P3 having a moisture content adjusted.

  Next, the wood chip P3 with adjusted water content was put into the drum blender 9, and the tannin-based adhesive 10 was mixed so as to be 5% by weight with respect to the wood. The wood chip P thus obtained was put into the orientation laminating apparatus 1 to perform orientation lamination.

  The tannin adhesive was prepared as follows. First, tannin powder was dissolved in warm water at about 40 ° C. to a concentration of 45 mass%. Thereafter, the pH was adjusted to 10 with an aqueous sodium hydroxide solution having a concentration of 48% by mass. Then, a mixed solution of a modified styrene butadiene copolymer emulsion (manufactured by Nippon Zeon Co., Ltd., trade name “Nipol LX430”) and a 40% by mass aqueous solution of hexamethylenetetramine mixed at a ratio of 10: 5.5 (aqueous solution base) in advance. Was blended to 15.5 parts by mass with respect to 100 parts by mass of the tannin aqueous solution.

  An alignment laminating apparatus 1 used in Examples is shown in FIG. In the oriented laminating apparatus 1, stainless steel plates having a length of 500 mm, a height of 500 mm, and a thickness of 1.2 mm are erected in parallel at a pitch of 19 mm. On the belt conveyor 6, a stainless steel call plate for conveyance is placed. The lower ends of the orientation plates 31 and 37 on both sides do not come into contact with the upper surface of the call board due to vibration, and the wood chips do not fall out of the call board from the gap. A gap having a size of 1.5 mm is formed over the entire length in the transport direction between the lower ends of the alignment plates 31 and 37 and the call plate so as not to fall off. On the other hand, the gap K between the lower ends of the orientation plates 32, 33,..., 36 other than the orientation plates 31 and 37 on both sides and the call plate has a gap k1 at the end on the upstream side in the transport direction of 1.5 mm, and is located downstream. As it goes, the clearance is gradually widened to 30 mm at the downstream end. At this time, except for the point of being laminated at a place of 1.5 mm or less from the upper surface of the call plate, the lamination point is always above the lower ends of the alignment plates 32, 33,. The chips P are always stacked while being regulated by the alignment plates 31, 32,. The upper end edges of the orientation plates 31, 32,... 37 have a downward slope of −10 ° with respect to the horizontal toward the downstream in the conveying direction of the call plate.

  The entire orientation laminating apparatus 1 is wound in a belt shape to be provided with a metal belt, and the individual orientation plates 31, 32,... 37 are welded to the metal belt 51 at the end of the belt conveyor 6 in the MD direction. Are configured to be integrated. A vibrator 52 (vibration motor RV-24D, manufactured by Shinko Electric Co., Ltd.) is fixed to the TD side of the call plate of the metal belt so that the vibration direction is obliquely upward at 25 ° from the horizontal. Support springs 53 are provided at the four corner positions of the metal belt 51 to support the entire alignment layering apparatus 1 on a support base 54. The vibration conditions were an amplitude of 2 mm, a vibration frequency of 1710 times / minute, and the conveying speed of the belt conveyor 6 was 1 m / minute.

In order to prevent slipping, the tannin-based adhesive used above was sprayed on the upper surface of the conveying call plate so as to have a coating amount of 50 g / m ² on the upstream side of the alignment plate.

  The wood chip P subjected to the above processing is upstream of the oriented laminating apparatus 1 by a free fall at a rate of 11 kg per unit width (1 m) from the wood chip supplying apparatus 2 arranged on the upstream side of the oriented laminating apparatus 1. The wood laminate mat M was put into the side end and the wood laminate mat M coming out of the call board was confirmed.

(Example 2)
The wood laminate mat M orientation state was confirmed in the same manner as in Example 1 except that a 45 mass% aqueous solution of tannin was used in place of the tannin-based adhesive as an anti-slip treatment.

(Example 3)
Wood laminate mat M orientation in the same manner as in Example 1 except that an acrylic rubber pressure-sensitive adhesive (manufactured by Sumitomo 3M Co., Ltd., trade name “Spray glue 55 color”) was used as an anti-slip treatment instead of a tannin-based adhesive. Checked the condition.

Example 4
The wood laminate mat M orientation state was confirmed in the same manner as in Example 1 except that a striped steel plate (stripe shape 37.5 × 5.5 × height 1.2 mm) was used as the anti-slip treatment.

(Example 5)
As an anti-slip treatment, the wood laminate mat M orientation state was set in the same manner as in Example 1 except that glass cloth (manufactured by Chuko Kasei Kogyo Co., Ltd., trade name “Chuco Flow FGF-410-20”) was attached to the upper surface of the call board. confirmed.

(Example 6)
As an anti-slip treatment, the wood laminate mat M orientation state was confirmed in the same manner as in Example 1 except that the upper surface of the call plate was roughened using a disk grinder.

(Example 7)
The wood laminate mat M orientation state was confirmed in the same manner as in Example 1 except that the modified styrene butadiene copolymer emulsion was not used as a blend of the tannin adhesive.

(Comparative example)
Using the wood chips processed in the same manner as in the example, the same orientation laminating apparatus was used for orientation laminating on a non-slip treated cole board, and the wood laminate mat M orientation state was confirmed.

  In the orientation laminating apparatus and the orientation laminating method of the present invention, a sufficient propulsive force can be obtained because the conveying means is subjected to the anti-slip treatment of the wood chip, or a device for anti-slip treatment is attached. In addition, the wood chips can be sufficiently oriented in the vertical direction without staying on the conveying means, which is very useful in the industry.

It is a perspective view of an example of the orientation lamination apparatus of the woody chip of the present invention. It is a side view which shows an example of the clearance gap between the lower end of an orientation plate, and a conveying apparatus upper surface. It is a schematic diagram explaining the process of classifying a crushed wood chip. It is a schematic diagram explaining the process of adjusting a moisture content in a constant temperature and humidity chamber. It is a schematic diagram explaining the process of mixing a binder.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Orientation laminating apparatus 2 Supply means 3 Orientation means 31-37 Orientation plate 41-46 Orientation gap 5 Vibration imparting means 51 Metal belt 52 Vibrator 53 Support spring 54 Support stand 6 Belt conveyor 61 Call plate 7 Classifier 8 Constant temperature and humidity chamber 9 Drum blender P, P1, P2, P3 Wood chip M Wood laminate mat K Clearance

Claims (6)

  An orientation means for orienting a wood chip mixed with a binder continuously supplied from the supply means in a state of being uniform in the width direction in the transport direction of the transport means, and the wood chips oriented by the orientation means are stacked. And a wood chip orientation laminating device comprising transport means for transporting, wherein the transport means is subjected to anti-slip processing of the wood chips, or an apparatus for performing anti-slip processing of the wood chips is additionally provided. A wood chip orientation laminating device characterized by comprising:   The orientation means has a plurality of orientation plates erected substantially parallel to the transport direction of the transport means so as to form an orientation gap therebetween, and is provided with vibration imparting means for applying vibration to the orientation plate. The oriented stacking device for wood chips according to claim 1.   The aligning means includes a hook-shaped portion provided with an inclined alignment groove serving as a plurality of aligning portions arranged side by side in the width direction, a vibration applying means for applying vibration to the hook-shaped portion, and a downstream of the hook-shaped portion. 2. The wood chip orientation laminating apparatus according to claim 1, further comprising a plurality of orientation plates provided on a side and at a position of an upper end portion of the conveying means.   After orienting the wood chips mixed with the binder continuously supplied from the supply means in the width direction in the conveying direction of the conveying means, the oriented wooden chips are laminated on the conveying means and laminated. A method for producing a wooden chip oriented laminate, comprising forming a mat and transporting the laminated mat, wherein the wood chip is subjected to anti-slip treatment on the conveying means.   The said binder is a tannin type binder, The manufacturing method of the wood chip orientation laminated body of Claim 4 characterized by the above-mentioned.   The method for producing a woody chip oriented laminate according to claim 5, wherein the anti-slip treatment is performed using a tannin-based binder.

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