JP2001293704A - Apparatus and method for manufacturing woody board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus and a method for manufacturing a woody board capable of manufacturing the board of strong releasing strength and high quality. SOLUTION: The method for manufacturing the woody board comprises the steps of atomizing an adhesive component and a water component from a first nozzle 22a and a second nozzle 22b, respective, and making them coollide against each other to mix the adhesive component with the water component, thereby obtaining a most finely granulated adhesive. In this case, since the most finely atomized adhesive equivalently mixes woody small pieces or woody fibers, a decrease in physical properties due to irregular mixing can be prevented. Further, the woody board having good physical properties can be manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wood board manufacturing method and a wood board manufacturing method for manufacturing wood boards by adding an adhesive to wood pieces or wood fibers, and more particularly to improving the bonding strength of wood pieces or wood fibers. Regarding what can be made.

[0002]

BACKGROUND OF THE INVENTION Many wood boards are manufactured by using an adhesive component, heat and pressure to consolidate wood chips or wood fibers into an integral finished board product. Basically, this method of manufacturing a wooden board is to crush raw materials such as wood into small pieces by a chipper or to defibrate the fibers into fibers of a desired size by a refiner, and to form an adhesive composed of an adhesive component and other chemicals. This is a method of mixing, partially dehydrating, shaping into a mat, and compressing between heated platens of a hot press to form a wood board of desired thickness and density.

[0003] Here, a method of mixing an adhesive with defibrated wood chips or wood fibers is important for obtaining a high quality wood board. Japanese Patent Application Laid-Open No. Hei 2-270303 discloses that when a wood piece or a wood fiber obtained by fibrillating wood with a refiner is sent to a dryer by a blow line, an emulsified adhesive is supplied from a nozzle assembly connected to the blow line. A way to do that has been proposed. In this method, the adhesive component is emulsified in advance in the nozzle assembly, and then the emulsion is sprayed on the wood chips or wood fibers.

[0004]

However, in the apparatus and method described in JP-A-2-270303, the quality of a wood board obtained by adding an adhesive to wood chips or wood fibers and performing hot pressing is as follows. It was not satisfactory in properties such as peel strength.

As a result of various investigations and investigations on the reason, it has been found that, with the apparatus and the method described in Japanese Patent Application Laid-Open No. 2-270303, the wood board of a predetermined quality cannot be obtained due to insufficient dispersion of the adhesive. understood.

[0006] The present invention has been made based on the above findings, and an object of the present invention is to provide a wood board manufacturing apparatus and a wood board manufacturing method capable of manufacturing a high quality wood board having high peel strength. That is.

[0007]

According to the first aspect of the present invention, which has been completed by the inventor to solve the above-mentioned problems, an adhesive obtained by mixing an adhesive component and a water component is converted into a wood piece or a wood fiber. In the wood board manufacturing apparatus for manufacturing a wood board from the wood chips or wood fibers, the mixing and adding apparatus includes at least one or more first nozzles for spraying the adhesive component, At least one or more second nozzles for spraying a water component and spray ports of the first nozzle and the second nozzle are opposed to each other at a predetermined angle, and the adhesive component and the water component are impact-mixed. Further, there is provided a wood board manufacturing apparatus which is an apparatus provided with a multi-headed nozzle including a first nozzle portion and a nozzle body supporting the second nozzle portion.

An adhesive component and a water component are sprayed from the first nozzle portion and the second nozzle portion, and the adhesive component and a water component which may contain an emulsifier or a release agent are impact-mixed to thereby form a fine-grained adhesive. Agent can be obtained. Since the finely divided adhesive is evenly mixed with the wood chips or wood fibers, it is possible to prevent deterioration in physical properties due to uneven mixing, and to manufacture a wood board having good physical properties.

According to a second aspect of the present invention, there is provided the wood board manufacturing apparatus according to the first aspect, wherein the multiple head type nozzle includes one or more third nozzles for spraying an additive.

If an additive reactive with the adhesive component or the water component is mixed with the adhesive component or the water component in advance and added to the wood chips, the nozzle may be clogged.
According to the described invention, even when an additive reactive with an adhesive component or a water component is added to a small piece of wood or the like, the additive can be sprayed from the third nozzle separately from the adhesive component or the water component. Can be prevented from being clogged. The additives include a curing agent, an insect repellent, an antiseptic, a termiticide, a sizing agent, a release agent and the like.

According to a third aspect of the present invention, the spray nozzle of the third nozzle portion faces the spray nozzles of the first nozzle portion and the spray nozzle of the second nozzle portion at a predetermined angle. And the nozzle body so that the adhesive component, the water component, and the additive collide and mix with each other outside the second nozzle portion and the third nozzle portion to blow out the adhesive containing the additive. The wood board manufacturing apparatus according to claim 2, wherein the board is supported by a wood board.

The first nozzle section, the second nozzle section, and the third nozzle section
By spraying the adhesive component, the water component, and the additive from the nozzle portion and colliding and mixing the adhesive component, the water component, and the additive, the adhesive containing the additive can be made into the finest particles. For this reason, the adhesive containing the additive can be evenly mixed with the wood chips or wood fibers, and a wood board having good physical properties can be manufactured.

The invention according to claim 4 is the wood board manufacturing apparatus according to any one of claims 1 to 3, wherein the adhesive component is an isocyanate.

Even when an isocyanate which rapidly reacts with the water component is used as the adhesive component, the first nozzle portion and the water component are sprayed from the first nozzle portion and the second nozzle portion to collide with each other. The spray port of the second nozzle portion is not clogged.

According to a fifth aspect of the present invention, there is provided a wood board for producing a wood board from the wood piece or wood fiber by adding an adhesive obtained by mixing an adhesive component and a water component to the wood piece or wood fiber. In the manufacturing method, a step of spraying the adhesive component and the water component separately, causing the adhesive component and the water component to collide and mix, and blowing the obtained adhesive onto the wood chips or wood fibers. It is a method of manufacturing a wood board including:

By spraying the adhesive component and the water component separately and colliding and mixing the adhesive component and the water component, it is possible to obtain an adhesive having the finest particle size. Since this finely divided adhesive is evenly mixed with wood chips or wood fibers,
It is possible to prevent a decrease in physical properties caused by uneven mixing, and to manufacture a wood board having good physical properties.

The invention according to claim 6 is the method for producing a wood board according to claim 5, which comprises a step of adding an additive to the wood chips or wood fibers together with or separated from the adhesive.

When an additive is added to wood chips or wood fibers in addition to the adhesive, a wood board having various properties can be manufactured according to the type of additive to be added. For example, when an insect repellent is added as an additive, a wood board having an insect repellent effect can be produced. Further, when added separately from the adhesive, an additive reactive with the adhesive component or the water component can be used, so that clogging of the nozzle can be prevented.
This is because if an additive reactive with the adhesive component or the water component is mixed with the adhesive component or the water component in advance and added, the nozzle may be clogged. The additives include a curing agent, an insect repellent, an antiseptic, a termiticide, a sizing agent, a release agent and the like.

According to a seventh aspect of the present invention, in the step, the adhesive component, the water component, and the additive are separately sprayed, and the adhesive component, the water component, and the additive are collision-mixed. 6. The method for producing a wood board according to claim 5, wherein the step of blowing the obtained adhesive onto the wood pieces or wood fibers.

[0020] The adhesive component, the water component and the additive are sprayed separately, and the adhesive component, the water component and the additive are collision-mixed to make the adhesive containing the additive the finest particles. Can be. For this reason, the adhesive containing the additive can be evenly mixed with the wood chips or wood fibers, and a wood board having good physical properties can be manufactured. The additives include a curing agent, an insect repellent, an antiseptic, a termiticide, a sizing agent, a release agent and the like.

The invention according to claim 8 is the method for producing a wood board according to any one of claims 5 to 7, wherein the adhesive component is an isocyanate.

Even when an isocyanate that rapidly reacts with a water component is used as the adhesive component, the adhesive component and the water component are separately sprayed and impact-mixed, so that the spray port of the nozzle is not clogged.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A wooden board manufacturing apparatus according to this embodiment will be described with reference to the drawings. As shown in FIG. 1, the wood board manufacturing apparatus 1 includes a feeder 2 that supplies wood chips, a digester 3, a refiner 4, a blow line 5, a dryer 6, a first cyclone 8, The cyclone 9, the fiber storage tank 10, the molding units 11, 12, 13 constituting the molding means, and the mixing and adding device 21 (FIG. 2)
), And the wood chips are defibrated and a wood board is formed by adding an isocyanate as an adhesive component to wood chips or wood fibers.

The digester 3 is connected to the downstream side of the supply device 2 so as to soften the wood chips. The refiner 4 is connected to the downstream side of the digester 3 so as to open the softened wood chips. The blow line 5 is a pipe connected from the refiner 4, and is configured to send a small piece of wood or a wood fiber containing a large amount of a water component to the dryer 6. The dryer 6 is set at about 150 ° C. from the supply port 6a.
Saturated steam of about 200 ° C. is sent to dehydrate the wood chips or wood fibers to reduce the weight moisture content of the wood chips or wood fibers.

A first cyclone 8 is connected to the downstream end of the dryer 6, and the first cyclone 8 reduces the weight content of water while separating wood chips or wood fibers from the saturated steam flow. It has become. The second cyclone 9 is connected to the downstream side of the first cyclone 8, and the second cyclone 9 also reduces the weight water content while separating wood chips or wood fibers from the saturated steam flow. . The fiber storage tank 10 is connected to the downstream side of the second cyclone 9, and the fiber storage tank 10 is connected to the fiber storage tank 10.
While evaporating steam from wood chips or wood fibers,
By storing wood chips or wood fibers, the weight water content is finally reduced to 15% or less.

The molding units 11, 12, 13 are
, A pre-press 12 and a hot-press press 13, and the wood piece or wood fiber sent from the fiber storage tank 10 is formed into a predetermined wood board by the forming unit 11, and the shape is adjusted by the pre-press 12. Then, heat is applied by a hot press 13 to harden the wooden board.

The mixing and adding device 21 is provided at the supply port 7b on the downstream side 6b of the dryer 6, and converts the adhesive obtained by mixing the isocyanate and the water component into small wood pieces or fibers that flow through the inside of the dryer 6. To be added. FIG. 2 is a diagram schematically illustrating the mixing and adding apparatus. The mixing and adding device 21 includes a double-headed nozzle 22, an isocyanate supply source (not shown), a water component supply source (not shown), and a compressed air supply source (not shown),
The water component and the isocyanate are collided and mixed, and the obtained adhesive is blown out toward small wood pieces or wood fibers.

The double-headed nozzle 22 includes a first nozzle portion 22a for spraying an adhesive component, a second nozzle portion 22b for spraying a water component, and a nozzle body 22c. And isocyanate are mixed by collision.

The first nozzle portion 22a and the second nozzle portion 22
The nozzle b is supported by the nozzle body 22c such that the spray ports 22d and 22e face each other at a predetermined angle. Inside the nozzle body 22c, a channel c for compressed air, a channel a for isocyanate, and a channel b for water component are formed.
The channel c of the compressed air is divided into two parts in the nozzle body 22c and extends toward the first nozzle part 22a and the second nozzle part 22b, and the first nozzle part 22a and the second nozzle part 22b.
b is supplied with compressed air. Further, the flow path a of the isocyanate extends from the nozzle body 22c toward the first nozzle portion 22a, and supplies isocyanate to the first nozzle portion 22a. The water component flow path b extends from the nozzle body 22c toward the second nozzle portion 22b, and supplies the water component to the second nozzle portion 22b.

The first nozzle portion 22a and the second nozzle portion 22
As shown in FIG. 3, b is formed in a concentric double cylinder, the center of which forms a flow channel a for isocyanate and a flow channel b for water component, and the periphery thereof is a flow channel for compressed air. Construct c. Thereby, isocyanate and compressed air are simultaneously ejected from the first nozzle portion 22a, and the second nozzle portion 22
From b, a water component and compressed air are simultaneously injected. Further, the spray ports 22d and 22e at the tips of the first nozzle portion 22a and the second nozzle portion 22b are arranged so as to be close to each other, and spray the adhesive mixed by the collision of the isocyanate and the water component with compressed air. Are arranged so as to spray the small wood pieces or wood fibers.

Next, a method for manufacturing a wooden board according to the present embodiment will be described by using, as an example, a case where the wooden board manufacturing apparatus 1 of FIG. 1 is used. In the manufacture of a wood board, it is particularly important from the viewpoint of the peel strength of the wood board to evenly disperse the adhesive in the wood chips or wood fibers. The wood board manufacturing method according to the present embodiment is a method in which the adhesive is dispersed evenly in the wood chips or wood fibers by adding the finely divided adhesive to the wood chips or wood fibers.

As shown in FIGS. 2 and 3, the isocyanate supplied from the isocyanate supply source is sent to the first nozzle section 22a. The water component supplied from the water component supply source is sent to the second nozzle unit 22b. The first nozzle portion 22a and the second nozzle portion 22b are connected to the respective spray ports 22.
Since d and 22e face each other at a predetermined angle, the isocyanate and water component sprayed from each of the spray ports 22d and 22e collide with the outside of the first nozzle portion 22a and the second nozzle portion 22b. Mixed. in this way,
The reason why the collision is caused when the isocyanate and the water component are mixed is to minimize the particle size of the adhesive obtained by the reaction between the isocyanate and the water component. In addition, the reason why the collision is performed outside the first nozzle portion 22a and the second nozzle portion 22b is that the isocyanate and the water component react rapidly, and if they react inside the nozzle in advance, clogging occurs at the spray port of the nozzle. Because it may cause

The impact-mixed adhesive is sprayed on the first nozzle portion 22a and the second
By the compressed air injected from the nozzle part 22b,
Sprayed towards wood chips or wood fibers. The first nozzle portion 22a and the second nozzle portion 22b are connected to the respective spray ports 22.
d and 22e are arranged so as to face each other at a predetermined angle, so that the compressed air injected from each of the spray ports 22d and 22e collides with the outside of the first nozzle portion 22a and the second nozzle portion 22b, and is integrated. To form an airflow toward the wood chips or wood fibers. Due to this air flow, the mist-like adhesive that has been subjected to collision mixing is added to the wood chips or wood fibers.
As described above, since the adhesive in the form of a mist is added in the form of fine particles so that the adhesive is easily dispersed evenly in the wood chips or wood fibers, the adhesive is uniformly mixed with the wood chips or wood fibers. As a result, uneven mixing of the adhesive is eliminated, and a wood board having high peel strength can be obtained.

The woody piece or woody fiber of the present invention is a woody material such as coniferous or hardwood made into needle-like, rod-like or plate-like small pieces or fiberized. When it is desired to increase the bending strength of the obtained board, a rod-shaped or plate-shaped small piece is preferable. The woody material of the present invention may be palm trees, rubber trees, kollan stalks, corn stalks, bagasse, fir shells, hemp, straw, reeds, rush, coconut nuts, etc., in addition to the conifers and broad-leaved trees. .

The adhesive to be added to the wood chips or wood fibers is about 7% by weight based on the weight of the wood chips or wood fibers.
About 10% is a suitable amount. When obtaining an adhesive from an isocyanate and polyisocyanate system and a water component, the mixing ratio of the isocyanate and polyisocyanate system and the water component is as follows:
1: A ratio of 0.2 to 5.0 is preferable.

In the wood board manufacturing apparatus and the wood board manufacturing method according to the present embodiment, as described above, the case where isocyanate is used as the adhesive component has been described as an example, but the adhesive component is limited to isocyanate. is not. Thus, for example, other suitable thermosetting adhesive components such as urea-based or phenol-based may be used.

As the isocyanate used in the present invention, any compound having an isocyanate group can be used. Preferred isocyanates for spraying are those having a viscosity at room temperature of 500 mPa · s or less and a low volatility from the viewpoint of labor safety. Examples of such compounds include diphenylmethane diisocyanate, polymethylene polyphenylene polyisocyanate, and isocyanate-terminated prepolymers obtained by reacting them with a polyol compound under an excess of isocyanate groups. Further, a so-called liquid MDI in which a part of an isocyanate group is carbodiimidized can also be mentioned.

When the adhesive is added (sprayed) to the wood chips or wood fibers, the additives may be dispersed or dissolved in advance in the adhesive component or the water component, or may be added together with the adhesive, if necessary. Alternatively, they can be separately added (sprayed). When dispersing or dissolving the additive in the adhesive component or the like in advance, it is necessary to perform the dispersing or dissolving on the component that does not react with the additive.

When the additive is added (sprayed) together with the adhesive, instead of the double-headed nozzle 22 shown in FIG. 2, a first nozzle portion 22a for spraying isocyanate (adhesive component) and a water component are sprayed. A multi-head type nozzle having the second nozzle portion 22b and the third nozzle portion for spraying the additive may be used. In this case, the adhesive component, the water component, and the additive sprayed from each nozzle portion collide with each other and are mixed, and the adhesive containing the additive becomes the finest particles. For this reason, not only the adhesive but also the additives can be evenly mixed with the wood chips or wood fibers.

When the additive is added separately from the adhesive, the mixing and adding device 21 is provided with the double-headed nozzle 2 shown in FIG.
2, a single-headed nozzle may be provided, and the additive may be added by the single-headed nozzle.

The position where the double-headed nozzle 22 and the plural-headed nozzle shown in FIG. 2 are provided is not limited to the supply port 7 b on the downstream side of the dryer 6. Therefore, the supply ports 7a, 7c, 7d may be provided in any of the blow line 5, the first cyclone 8, and the second cyclone 9, and the double-headed nozzle 22 or the multiple-headed nozzle shown in FIG. . When a single-headed nozzle is provided, the single-headed nozzle is provided at any of the supply ports 7a to 7d other than the supply port provided with the double-headed nozzle 22 shown in FIG.

Next, another example of the wooden board manufacturing apparatus 1 according to this embodiment will be described with reference to FIG. The wood board manufacturing apparatus 31 is an apparatus for manufacturing, in particular, a particle board among wood boards, and will be described below as a particle board manufacturing apparatus.

The particle board manufacturing apparatus 31 includes a flaker 32, a first dryer 33, and a refiner 3.
4, a second dryer 35, an air shifter 36,
The surface silo 37, the core layer silo 38, the chip mixer 39, the chip blender 40, the forming machine 41, the hot press 42, the wide belt sander 43, the sizing saw 44, and the mixing and adding device 21 The wood chips are defibrated, and an isocyanate as an adhesive component is added to wood chips or wood fibers to form a particle board.

The flaker 32 cuts the supplied chips to a predetermined size. The first dryer 33 is connected to the downstream side of the flaker 32,
Chips that have been cut and contain a large amount of water are dehydrated. The refiner 34 is connected to the downstream side of the first dryer 33, and defibrate the dehydrated chips into wood fibers. The second dryer 35 is connected to the downstream side of the refiner 34 so as to further dehydrate the wood fiber. The air shifter 36 is connected to the downstream side of the second dryer 35, and sorts the dewatered wood fibers into fine wood fibers and coarse wood fibers, while the surface silo 3.
7 and the core layer silo 38. The surface silo 37 is connected to the downstream side of the air shifter 36 and accumulates a certain amount of fine wood fibers. The silo 38 for the core layer is connected in parallel with the silo 37 for the surface layer on the downstream side of the air shifter 36 so as to accumulate a certain amount of coarse wood fibers.

The chip mixer 39 includes a surface silo 37.
, And is configured to mix the fine wood fiber supplied from the surface silo 37 with the adhesive. The chip blender 40 is provided with the core layer silo 3.
8 and is configured to mix the coarse wood fiber supplied from the core layer silo 38 with the adhesive. The forming machine 41 includes a chip mixer 39.
And is connected to the downstream side of the chip blender 40,
The wood fiber is formed into a mat-like particle board so that the coarse wood fiber becomes the center of the board and the fine wood fiber becomes the surface layer of the board. The hot press 42 is connected to the downstream side of the forming machine 41 so as to hot-press a mat-shaped particle board. The wide belt sander 43 is connected to the downstream side of the hot press 42 and conveys the hot-pressed wood board to the sizing saw 44. The sizing saw 44 cuts the wooden board into a predetermined shape.

The mixing and adding device 21 (see FIG. 2) includes a supply port 39a of the chip mixer 39 and a chip blender 40.
The adhesive obtained by mixing the isocyanate and the water component is added to the wood fiber.

When the adhesive is added to the chip mixer 39 and the chip blender 40, additives can be added as needed. In this case, the mixing and adding device 21
Is provided with a single-headed nozzle separately from the double-headed nozzle shown in FIG. 2, and the additive is added to the wood fiber from the supply ports 39b and 40b by the single-headed nozzle. Here, the additives are a curing agent, an insect repellent, an antiseptic, a termite, a sizing agent, a release agent and the like.

The adhesive and the additive may be mixed and added to the chip mixer 39 and the chip blender 40. In this case, instead of the double-headed nozzle 22 shown in FIG. 2, the mixing and adding device 21 includes a first nozzle portion 22a for spraying an isocyanate (adhesive component), a second nozzle portion 22b for spraying a water component, and an additive. A multi-head type nozzle having a third nozzle portion for spraying may be used. When this multi-head nozzle is used, the adhesive component, the water component, and the additive sprayed from each nozzle portion collide and mix with each other, and the adhesive containing the additive is obtained to be the finest particles. For this reason, not only the adhesive but also the additives can be evenly mixed with the wood chips or wood fibers.

The construction of the production lines 2 to 13 and 32 to 44 of the wooden board production apparatuses 1 and 31
Is not limited to the wood board manufacturing apparatus shown in FIGS. 1 and 4.

[0050]

The invention according to any one of claims 1 to 8, wherein the adhesive component and the water component are sprayed, and the adhesive component and the water component are collision-mixed, whereby the adhesive having the finest particle size is obtained. Can be obtained. Since the finely divided adhesive is evenly mixed with the wood chips or wood fibers, it is possible to prevent a decrease in physical properties due to uneven mixing and to produce a wood board having good physical properties.

According to the second aspect of the present invention, even when an additive reactive with an adhesive component or a water component is added to a small piece of wood or the like, the additive is sprayed from the third nozzle separately from the adhesive component or the water component. Therefore, it is possible to prevent the nozzle from being clogged.

According to the third or seventh aspect of the present invention, the adhesive component, the water component, and the additive are separately sprayed,
By collision-mixing the adhesive component, the water component, and the additive, the adhesive containing the additive can be made into the finest particles. For this reason, the adhesive containing the additive can be evenly mixed with the small wood pieces or wood fibers, and the wood board having good physical properties can be manufactured.

According to the fourth or eighth aspect of the present invention, since the rapidly reacting isocyanate and the water component are caused to collide with each other, it is possible to prevent the spray port of the nozzle from being clogged.

[Brief description of the drawings]

FIG. 1 is a diagram schematically illustrating a wooden board manufacturing apparatus according to the present invention.

FIG. 2 is a diagram illustrating an outline of a mixing and adding apparatus according to the present invention.

FIG. 3 is a diagram illustrating a state of collision mixing of an adhesive component and a water component.

FIG. 4 is a diagram illustrating another example of the wood board manufacturing apparatus according to the present invention.

[Explanation of symbols]

 1, 31 Wood board manufacturing apparatus 6a Supply port 7a to 7d Supply port 21 Mixing and adding apparatus 22 Double head nozzle (multiple head nozzle) 22a First nozzle part 22b Second nozzle part 22c Nozzle body 22d, 22e Spray port a Isocyanate Supply path b Supply path for water component c Supply path for compressed air 39a, 40a Supply path 39b, 40b Supply path

Claims (8)

[Claims] 1. A wood board manufacturing apparatus comprising a mixing and adding device for adding an adhesive obtained by mixing an adhesive component and a water component to a wood piece or wood fiber, and manufacturing a wood board from the wood piece or wood fiber. In the apparatus, the mixing and adding device may be configured such that a first nozzle portion that sprays the adhesive component, a second nozzle portion that sprays the water component, and spray ports of the first nozzle portion and the second nozzle portion are predetermined. The first nozzle portion so that the adhesive component and the water component collide and mix with each other outside the first nozzle portion and the second nozzle portion, and the obtained adhesive is blown out. And a wood board manufacturing apparatus which is an apparatus provided with a multi-head type nozzle including a nozzle body supporting the second nozzle portion. 2. The wood board manufacturing apparatus according to claim 1, wherein the multi-head type nozzle includes one or more third nozzles for spraying an additive. 3. The third nozzle section has a spray port facing a spray port of the first nozzle section and the spray port of the second nozzle section at a predetermined angle, and the first nozzle section and the second nozzle section. The adhesive component, the water component, and the additive are collided and mixed outside the third nozzle portion, and are supported by the nozzle main body so as to blow out the adhesive containing the additive. The wood board manufacturing apparatus according to claim 2. 4. The wood board manufacturing apparatus according to claim 1, wherein the adhesive component is an isocyanate. 5. A method for manufacturing a wood board, wherein an adhesive obtained by mixing an adhesive component and a water component is added to wood chips or wood fibers to manufacture a wood board from the wood chips or wood fibers. A method for producing a wood board, comprising the steps of separately spraying an agent component and the water component, causing the adhesive component and the water component to collide and mix, and blowing the obtained adhesive onto the wood chips or wood fibers. 6. The method for producing a wood board according to claim 5, further comprising a step of adding an additive to the wood chips or wood fibers together with or separated from the adhesive. 7. The method according to claim 7, wherein the adhesive component, the water component, and the additive are separately sprayed, and the adhesive component, the water component, and the additive are collision-mixed. The method for producing a wood board according to claim 5, wherein the step is a step of blowing an agent onto the wood piece or wood fiber. 8. The method according to claim 5, wherein the adhesive component is an isocyanate.