JPH0752111A - Resin bonding system and method for manufacturing wood panel - Google Patents

Abstract

(57) [Summary] [Purpose] Baking time is greatly shortened, thereby dramatically improving manufacturing efficiency. Provided is a system and method that does not interrupt manufacturing operations for cleaning molding equipment. [Structure] In order to raise the temperature of a warp block, an adhesive and other chemical auxiliaries which are mixed to form a warp panel, a high temperature fluid consisting of pressurized steam is sent to a resin joining device 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray-type resin bonding system and method for manufacturing warp panels.

[0002]

2. Description of the Related Art As a conventional method for manufacturing a wood panel,
As shown in FIGS. 4 to 6, a warp obtained from dried wood is weighed, and a ribbon balance 2 hung from a load cell 3 is used.
It is carried out in a system equipped with a weighing hopper 1 for supplying a continuous flow of hemp wood. The balance 2 continuously sends the weight value of the warp wood supplied to the resin bonding apparatus to the electronic processor. In order to maintain the weight ratio of the dry adhesive and the dried wood to a value set by the operator, the electronic processor uses a pump 5 that supplies an adhesive mixed solution including water, the adhesive, and the hardened paraffin mixture to the resin bonding apparatus 4. Control the number of rotations.

Conventionally, at least two systems are used in each production line of wood panel. One system is used to resin bond the fine warps that form the outer surface of the panel, and the other system is used to resin bond the coarser wood that forms the interior of the panel. A molding system 6 is further provided downstream of these systems,
As shown in FIG. 6, it comprises four molding devices 7, 8, 9, 10 arranged in-line. First molding device 7
Spreads a first layer of resin-bonded fine warp on a forming ribbon or web, and second and third forming devices 8, 9 form two layers of resin-bonded coarse warp, and a fourth forming The device 10 forms the final layer of finer wood.

The "mattress" 12 thus formed
Are conveyed into the continuous pressing device 13 by means of a forming ribbon or web which is continuously driven under the forming device. The pressing device 13 is equipped with two steel ribbons 14, which are at the same speed as the forming ribbon 14
It slides on the two plates 15 heated to 40 degreeC.
The resin-bonded warp mattress is solidified by the curing of the resin by the action of both pressurization and heating, and becomes a finished product of the warp panel.

[0005]

However, the above-mentioned prior art has some drawbacks described below. That is, especially in the winter, the temperature of the mattress lowers by about 20 ° C. with respect to the temperature in the summer, which requires a long baking time.
As a result, the operating time of the system takes a long time from 4.8 seconds / mm to 5.9 seconds / mm when the finished product of the wood panel has a base thickness of 18 mm. Another drawback is that
The operation of the system must be periodically interrupted to remove resin or wood flour scales from the resin splicer. Yet another drawback is that the resin bonding efficiency is relatively low and it is necessary to supply water of about 5 ° C. from the cooling device to cool the jacket of the resin bonding device. This is because the scale tends to adhere to the inner surface of the jacket due to overheating due to friction, and the device may be clogged. Further, in the above-described molding apparatus, the joining resin is not optimally dispersed with respect to the warp, so that stain occurs. Moreover, there is a drawback that it is necessary to use an expensive paraffin emulsion in order to reduce the amount of water absorbed in the finished product.

The present invention provides a system and method that significantly reduces baking time, thereby dramatically improving manufacturing efficiency and without interrupting manufacturing operations for cleaning molding equipment. The present invention is intended to solve the above-mentioned drawbacks of the prior art. Therefore,
The main object of the present invention is to provide a resin bonding method and system that realizes extremely high work efficiency and thereby improves the mechanical properties of the finished product of the warp panel.
Another object of the present invention is to provide a resin bonding method and system for improving the extension of the mattress by the molding apparatus and thereby improving the thickness tolerance of the panel raw material at the outlet of the press. Another object of the present invention is to provide a resin bonding method and system that does not require the use of paraffin emulsion. Still another object of the present invention is to
It is an object of the present invention to provide a resin joining method and system which does not require a cooler for cooling a circulating water jacket of a resin joining apparatus.

[0007]

In order to achieve the above object, a resin bonding system for producing a warp panel of the present invention is provided with a temperature of warp lumps, adhesives and chemical auxiliaries which are mixed to form a warp panel. It is characterized in that it is configured to use a high-temperature fluid consisting of pressurized steam sent to the resin joining device in order to increase the temperature.

Furthermore, the resin joining method for producing a warp panel according to the present invention heats a mixture of a wood block, an adhesive and a chemical auxiliary agent which is made turbulent by a stirring means operating in the resin joining apparatus. And simultaneously applying the diffused dynamic pulsation, the heat and the dynamic pulsation are applied by injecting pressurized steam into the resin bonding apparatus, and the steam advances the material by the operation of the stirring means. In terms of direction, it is characterized by superheating and pretreatment upstream of the supply area of the adhesive mixture.

[0009]

Since the present invention has the above-mentioned structure, the superheated steam introduced into the resin bonding apparatus expands to heat the adhesive mixture and increase its "malleability". In addition, superheated steam widens the pores of the wood, facilitating proper penetration of adhesives and other chemical auxiliaries into the pores. Therefore, the joining efficiency is improved, and a finished product of the wood panel having excellent mechanical properties, durability and moisture resistance can be obtained. In addition, the superheated steam provides optimum penetration of the chemical auxiliaries into the mattress without adversely affecting the catalysis of the bonding resin. The introduction of the superheated steam into the resin joining device lubricates the wall surface of the resin joining device, and reliably prevents the contamination without requiring cold water. Since superheated steam is used, the heating time is greatly shortened. Moreover, the formaldehyde content of the product can be significantly reduced.

[0010]

According to the present invention, the baking time can be greatly shortened, and as a result, extremely high working efficiency can be realized.
Accordingly, it is possible to provide a resin bonding method and system for improving the mechanical properties of the finished product of the warp panel.

[0011]

Embodiments of the present invention will be described in detail with reference to the drawings. The accompanying drawings, and in particular FIG. 5, show a prior art resin bonding system for manufacturing wood panel. This system is equipped with a weighing hopper 1 for dried warp wood, and the dried warp wood is supplied to the ribbon balance 2 suspended from the load cell 3 in a continuous flow. The balance 2 is provided to continuously send data regarding the weight of the warp wood supplied to the resin bonding apparatus 4 to the electronic processor. The processor rotates the pump 5 that supplies the resin-bonding device 4 with an adhesive mixture consisting of water, the adhesive, and the hardened paraffin emulsion in order to maintain the weight ratio of the dry adhesive and the dried wood to a value set by the operator. Control the number.

Conventionally, at least one resin bonding system as described above is used for each layer of a mattress formed along a production line for warp panels. That is, some resin joining devices are used for resin joining the fine warps forming the outer surface of the panel, and one or more resin joining devices for joining the coarse warps for mattress forming the inside of the panel. Is used. A molding system 6 is provided on the downstream side of the above apparatus, as shown in FIG. This consists of four molding devices 7 arranged in-line,
It consists of 8, 9, and 10. The first forming device 7 spreads a first layer of resin-bonded fine warp wood on the forming ribbon 11, and the second and third forming devices 8, 9 form two layers of resin-bonded coarse warp wood, The last forming device 10 forms the final layer of fine warp wood.

The mattress 12 thus formed is
It is conveyed into the continuous pressing device 13 by the forming ribbon 11 which is continuously driven under the forming device. The pressing device 13 comprises two steel webs or ribbons 14, which are heated at the same speed as the forming ribbons 11 by a heating plate 15.
Slide along. The resin-bonded warp mattress 12 is solidified by the curing of the resin by the action of both pressurization and heating, and becomes a finished product of the warp panel.

However, as described above, the manufacturing method using such a known system has some drawbacks. In particular, in the winter, the temperature of the mattress 12 lowers by about 20 ° C. with respect to the temperature in the summer, and accordingly a long baking time is required. Therefore, the operating time of the system is 4.8 with respect to the base thickness of 18 mm of the finished product of the wood panel.
Increase from seconds / mm to 5.9 seconds / mm.

The spray-type resin bonding system and method of the present invention, as shown in FIGS.
A mixture of wood, adhesive and chemical auxiliaries which are turbulent by the agitator 16, which is an agitating means operating in the same, is arranged to simultaneously and uniformly heat and impart additional dynamic pulsations. There is. Teeth are arranged on the surface of the stirrer 16 according to the spiral generatrix. Specifically, it is heated by injecting pressurized steam (set pressure 0.1 to 13 bar), and this steam is superheated to a temperature (120 to 200 ° C.) set by an operator and further pretreated. receive. Pressurized steam is preferably supplied via a steel injector 17 which is orthogonal to the direction of flow. The injector 17 is equipped with a nozzle having an inner diameter of 8 to 10 mm, which is about 3 mm from the supply hopper 18 of the resin joining device 4.
It is provided at a distance of 00 mm and is located immediately upstream of the injector that supplies the adhesive mixture with respect to the material flow direction by the stirrer 16. The pretreatment is carried out in a suitable steel cylindrical container or turbo mixer 19. The mixer container 19 preferably has an inner diameter of φ = 350 mm, a height of about 600 mm, and a thickness of about 10 mm. This turbo mixer container 19 has two nozzles 2 provided in a tangential direction of the container surface.
0 and 21 and internal deflection fins 22 and 23.

A condensate separator 24 is connected upstream of the mixer container 19 where the vapor components adhering to the ducts of the system are separated. That is, superheated steam is introduced into the container 19 via the nozzle 20 and some chemical auxiliaries are introduced via the nozzle 21. Deflection fin 22,
Due to the provision of 23, the superheated steam and the chemical auxiliary agent mix in the central part of the container 19. Due to the action of these fins 22, 23, the auxiliary agent is separated from the superheated steam stream at the initial stage when the auxiliary agent is delivered to the vessel for steam treatment.
Specifically, the chemical auxiliaries include surfactants 25 such as ethylene and methylene glycol. These auxiliaries are
It regulates the surface condition of the water to properly control the heat balance of the water in the treatment stages during different seasons.

In addition, catalytic materials or cleaning materials may be used to accelerate the curing of the adhesive mixture. The latter is preferably used for cleaning all equipment, especially downstream. Further, a water-releasing substance may be used for improving the water resistance of the wood panel.

The spray mixture formed as described above and having uniform physical properties is supplied to the resin bonding apparatus 4 via the injector 17. The impingement transfers heat of condensation and momentum from the spray mixture to the dried wood. Mutual slip and impact action of the wood and adhesive mixture,
Due to the action of turbulence between some substances introduced into the resin joining device 4, the adhesive mixture gradually impregnates the wood.

The main feature of the present invention is the injection of superheated steam, which provides several significant advantages. First,
The steam introduced into the resin bonder expands, heating the adhesive mixture and increasing its "malleability". In addition, the vapor spreads the wood pores, allowing adhesives and other chemical auxiliaries to properly penetrate the pores. Therefore, the joining efficiency is improved, and a finished product of the wood panel having excellent mechanical properties, durability and moisture resistance can be obtained. In addition, the vapor provides optimum penetration of the chemical auxiliaries into the mattress without adversely affecting the catalysis of the bonding resin. The introduction of superheated steam into the resin joining device lubricates its wall surface and prevents its contamination without the need for cold water. However, exclusively tower water at 30 ° C. may be used to cool the water jacket of the resin joining apparatus as needed. Furthermore, the vapors which gradually condense on the inner wall of the cylindrical jacket 4 ′ of the resin joining device 4 form a continuous lamella that has a lubricating effect on the flow of wood towards the outlet 29 to the molding system 6.

One of the main effects of this embodiment is that the heating time is greatly reduced by the superheated steam.
In fact, superheated steam can very effectively increase the temperature of the mattress by about 20 ° C., mainly in winter, and correspondingly increase the operating efficiency by about 20% with respect to the quantity or yield of the panels produced. Can be achieved. Another important point of the present invention is that the formaldehyde content of the product can be significantly reduced. From the above description, it will be understood that the invention achieves its intended purpose. The present invention can be modified and changed in several ways, all of which are included in the scope of the technical idea of the invention. Further, the detailed structure can be replaced with other technically equivalent elements.
The materials used in carrying out the invention may be of any size or shape as required, so long as they are compatible with the intended use.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a resin joining system.

FIG. 2 is a schematic side sectional view of a container for steam treatment of warp wood.

3 is a cross-sectional view of the container of FIG. 2 connected to a vapor condensate separator.

FIG. 4 is a schematic view of a conventional system for continuously pressing warp panels.

FIG. 5 is a schematic view of a conventional resin bonding system for manufacturing a panel.

FIG. 6 is a schematic view of another part of the conventional system for continuously manufacturing warp panels.

[Explanation of symbols]

 4 Resin Joining Device 4'Cylinder Jacket 16 Stirring Means 17 Injector 19 Container 20, 21 Nozzle 22, 23 Deflection Fin 24 Condensate Separator 29 Outlet

Claims (18)

[Claims] 1. A resin joining system for producing warp panels, the resin joining apparatus (4) for increasing the temperature of warp blocks, adhesives, and other chemical auxiliaries that are mixed to form warp panels. A resin bonding system, characterized in that it is configured to use a hot fluid consisting of pressurized steam delivered to. 2. The resin joining system according to claim 1, further comprising a high temperature steam injector (17) arranged orthogonal to a moving direction of the warp blocks mixed in the resin joining device (4). 3. A toothed injector, wherein said steam injector (17) is provided upstream of an injector means for supplying an adhesive mixture with respect to the direction of travel of the wood and the adhesive mixture, said mixture being arranged according to a spiral generatrix. The resin joining system according to claim 2, which is driven by a stirring means (16). 4. The resin joint according to claim 1, wherein when the steam flow expands in the resin joint device (4), dynamic pulsation is transmitted to the wood and the adhesive mass in the resin joint device (4). system. 5. Superheated steam is mixed with a chemical auxiliary agent, the mixture being carried out in a mixer vessel (19) located upstream of the injection nozzle and connected to a condensate separator (24). 1. The resin joining system according to 1. 6. The mixer container (19) comprises a steam nozzle or duct (20) provided tangentially to its wall surface for treating the steam, the mixer container (1)
Steam is supplied to a position in front of a second nozzle (21), also tangentially provided, for introducing a chemical auxiliary agent to be mixed with the above in (9). Resin bonding system. 7. Deflection fins (22, 23) separating the chemical auxiliary agent from the vapor stream at the start of steam introduction so that the vapor and the chemical auxiliary agent are uniformly mixed are provided with deflection fins (22, 23).
The resin bonding system according to claim 5, which is provided in 9). 8. A pressure of 0.1 to 13 bar and a pressure of 120 to
Injector for injecting steam superheated to 200 ℃ (1
The resin bonding system according to claim 1, further comprising 7). 9. The container according to claim 1, further comprising a container (19) into which a surface-active substance, a catalytic substance, a cleaning substance and a water-generating substance forming a spray mixture supplied to the resin joining device (4) are supplied. The resin joining system described. 10. The heat of condensation and momentum are transferred from the atomized mixture to the dried wood by collision, and the slip force, collision and turbulence of the wood and the adhesive mixture in the resin joining device (4). 10. The resin bonding system of claim 9, wherein the adhesive mixture gradually impregnates the wood to provide the sprayed mixture with uniform physical properties. 11. A lubricating action on the flow of resin-bonded wood towards the outlet (29) to the molding system by means of steam which gradually condenses on the inner wall of the cylindrical jacket (4 ') of the resin-bonding device (4). The resin bonding system according to claim 1, wherein a continuous layer road having a groove is formed. 12. The resin joining system according to claim 1, further comprising cooling means for cooling the resin joining device (4) with water. 13. A spray-type resin joining method for producing a warp panel, which is made into a turbulent flow by a stirring means (16) operating in a resin joining apparatus (4), an adhesive and Heat and dynamic pulsation are simultaneously applied to the mixture of chemical auxiliaries, and the heat and dynamic pulsation are applied by injecting pressurized steam into the resin joining device (4) to obtain the steam. Is heated and pretreated on the upstream side of the supply region of the adhesive mixture with respect to the advancing direction of the material by the operation of the stirring means (16). 14. A surface-active substance, a catalyst substance, for forming a spray mixture to be supplied to the resin joining device (4),
14. Resin bonding method according to claim 13, wherein the superheated steam is pretreated in a mixer vessel (19), preferably a steel mixer vessel, for supplying cleaning and water-producing substances. 15. The superheated steam is introduced into the cylindrical container (19) through a nozzle (20), and the superficial substance, the catalytic substance, the washing and the water generating substance are introduced into the mixer container (19). The resin bonding method according to claim 13, wherein the introduction is performed through the second nozzle (21). 16. The slip force and mutual collision between the wood and the adhesive mixture due to the turbulent action in the resin joining device (4) by transferring the heat of condensation and momentum by collision from the spray mixture to the dried wood. The resin bonding method according to claim 13, wherein the action gradually impregnates the wood mixture with the adhesive mixture to generate a flow of fine particles having uniform physical characteristics. 17. Lubricating action on the flow of resin-bonded traces towards the outlet (29) to the molding system by the steam which gradually condenses on the inner wall of the cylindrical jacket (4 ') of the resin-bonding device (4). The resin bonding method according to claim 13, wherein a continuous layer road having a groove is formed. 18. Immediately upstream of the supply of adhesive mixture,
Inject steam through one or more injectors (17) with nozzles arranged orthogonal to the direction of travel, with superheat, pretreatment and temperature set over a whole range of technically usable values The resin bonding method according to claim 13.