JP3231966B2 - Fiberboard manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing a fiberboard, which cuts a formed fiber mat into a predetermined size and press-molds the fiber mat with a heated template to produce a fiberboard. is there.

[0002]

2. Description of the Related Art Generally, a hard fiber board produced by a wet method is formed by forming a fiber mat by forming a slurry of wood fibers with a fourdrinier paper machine, and placing the fiber mat from the paper machine on a developing conveyer. The fiber mat is cut out to a certain size by a cutter, and the cut fiber mat is press-formed by a multi-stage press to produce. The fiber mat before press molding contains a large amount of moisture and a thermosetting adhesive.
As shown in (1), the fiber mat 12 is placed on the transport plate 51 via the wire mesh 52 for drainage, and set in a multi-stage press.
While the template 54 and the transport plate 51 are heated by the hot plates 55 and 56, the template 54 is pressed down and press-molded as shown in FIG. The hardened thermosetting adhesive is cured to bond the fibers of the inner layer to produce a hard fiberboard. At this time, in order to improve the mold release of the press-molded fiber mat 12 (hard fiber board), a release agent is sprayed onto the surface of the fiber mat 12 with a spray device before the press molding to apply. .

[0003]

By the way, at the time of press molding, since the four sides of the fiber mat 12 are pressed in an open state as shown in FIGS. 6 and 7, when a pressing pressure is applied, the four sides of the fiber mat 12 are pressed. Spreads out and spreads around the outside.
For this reason, the density of the fibers is lower at the four sides of the fiber mat 12 than at the center, and the pressing pressure cannot be applied as much as at the center. Fibers are easily peeled off. As described above, the release agent is applied to the surface of the fiber mat 12 before press molding. However, the four sides of the fiber mat 12 are spread and spread around the outside, so that the adhesive strength of the fibers is weakened. Then, the release agent becomes insufficient. For this reason, the fibers of the four sides of the fiber mat 12 are seized on the template 54 and the wire mesh 52, and the mold release of the fiber mat 12 is deteriorated.
At the time of release, the fibers on the four sides of the fiber mat 12 are peeled off while being baked on the template 54 and the wire mesh 52, and there is a problem that the quality is deteriorated. Moreover, the template 54 and the wire mesh 5
2 is used many times, and if the fibers remaining on the mold plate 54 and the wire mesh 52 remain as described above, not only the mold release becomes worse at the next and subsequent press moldings, but also the burning occurs before that. There is a problem that the smoothness of the surface of the fiber mat 12 deteriorates due to the burning of the fiber, and the burning of the fiber adheres to the surface of the fiber mat 12 and becomes dirty, so that the quality is further deteriorated. For this reason, conventionally,
In order to maintain the quality, the operator has to frequently perform the operation of removing the fibers stuck on the template 54 and the wire mesh 52, and there is a problem that the production efficiency is poor.

The present invention has been made in view of such circumstances, and an object of the present invention is to make it possible to improve mold release during press molding of a fiber mat, thereby realizing both quality improvement and productivity improvement. It is an object of the present invention to provide a fiberboard manufacturing apparatus capable of performing the above-mentioned operations.

[0005]

In order to achieve the above-mentioned object, a fiberboard manufacturing apparatus according to claim 1 of the present invention comprises a fiber mat continuously conveyed from a papermaking machine on a development conveyor. Cut to a certain size by a cutter traveling across the deployment conveyor, and cut the fiber mat by press molding with a heated template to produce a fiberboard, which is arranged on the deployment conveyor. , A release agent spraying device for spraying a release agent on the surface of the fiber mat being conveyed, and disposed above both sides of the developing conveyor,
A pair of first release agent blowing nozzles for blowing a release agent to both side edges of the fiber mat being conveyed, and a second for blowing the release agent to a cut portion of the fiber mat by running integrally with the cutter. And a release agent blowing nozzle.

In this case, the release agent spraying device includes a funnel-type cup into which the release agent is poured, and a rotating body that rotates at a high speed below the funnel-type cup. By allowing the release agent to flow naturally from the lower end opening of the cup to the center of the upper surface of the rotating body, the release agent is diffused around by the centrifugal force associated with the rotation of the rotating body and dispersed on the surface of the fiber mat. It is preferable to configure as follows.

[0007]

According to the first aspect of the present invention, the release agent is sprayed from the release agent spraying device onto the surface of the fiber mat which is continuously conveyed on the developing conveyor from the paper machine. Further, a release agent is blown out from the pair of first release agent blowing nozzles to both side edges of the fiber mat being conveyed, and the release agent is sufficiently permeated into both side edges of the fiber mat. Also,
The release agent is blown out from the second release agent blowing nozzle to the cut portion of the fiber mat, and the release agent is sufficiently permeated into the cut portion of the fiber mat. As a result, a sufficient amount of the release agent is infiltrated all around the four sides of the cut fiber mat, and the mold release during press molding is improved.

[0008] By the way, when the release agent spraying device is configured as a spray system in which the release agent is sprayed in a mist form from a large number of minute spray holes, the spray holes are easily clogged, and the spraying of the release agent is difficult. It is easy to be uniform. On the other hand, in the mold release agent spraying device of claim 2, the mold release agent is poured into the funnel type cup while the rotating body is rotated at a high speed below the funnel type cup, and the mold is released from the lower end opening of the funnel type cup. The agent is allowed to flow naturally to the center of the upper surface of the rotating body. As a result, the release agent that has flowed down onto the rotating body is dispersed toward the outer periphery of the rotating body due to centrifugal force and becomes a mist or a shower, and is evenly distributed on the surface of the fiber mat. In this configuration, the hole through which the release agent passes (that is, the opening at the lower end of the funnel-type cup) has a large diameter, so that there is no risk of clogging, and it is possible to stably spray the release agent for a long time.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 2, the long wire type papermaking machine 11 winds a belt-shaped upper wire mesh 4 around a large press roller 2, a plurality of small rollers 3, and a plurality of small press rollers 6. Is rotated, and a fiber mat 12 made by making a slurry of wood fiber on the lower wire mesh 7 for filtration is attached to the upper and lower wire meshes 4 and 7.
The flat fiber mat 12 is formed by being sandwiched therebetween. At this time, the upper wire mesh 4 is pressed down by the plurality of small press rollers 6 to flatten while compressing the thickness of the fiber mat 12 between the upper and lower wire meshes 4 and 7, and the upper wire mesh 4 It also serves to prevent the fibers on the surface 12 from being turned up to the small press roller 6 side. The fiber mat 12 produced by the papermaking machine 11 in this manner is
It is sent out on.

As shown in FIG. 1, a cutter traveling frame 14 is provided on the developing conveyor 13 in an inclined manner. On both sides of the cutter traveling frame 14,
As shown in FIG. 3, a pair of sprockets 15 and 16 are rotatably mounted, and a chain 17 is stretched over both sprockets 15 and 16. A slide member 19 is connected to the chain 17 via a connection fitting 18, and the slide member 19 can be slid by a roller 20 along the cutter traveling frame 14 in conjunction with the rotation of the chain 17. This slide member 19
The cutter 22 and the second
And a release agent blowing nozzle 23 are arranged side by side. The cutter 22 cuts the fiber mat 12 by spraying high-pressure water from a nozzle while traveling in the direction of arrow A in FIG. 1 along the cutter traveling frame 14 by the rotation of the chain 17, and the second mold is released to the cut portion. The liquid release agent (for example, paraffin) blown out from the agent blowing nozzle 23 is blown. After the cutting is completed, the cutter 22 stops spraying the high-pressure water and returns to the cutting start position. From the end of the cutting to the start of the next cutting, the blowing of the release agent from the second release agent blowing nozzle 23 is also stopped.

As shown in FIG. 1 and FIG. 4, behind the cutter traveling frame 14 (on the side of the paper machine 11), a liquid separating material is attached to the surface and both side edges of the fiber mat 12 sent out from the paper machine 11. A releasing agent spraying device 24 for applying a releasing agent (for example, paraffin) and a pair of first releasing agent blowing nozzles 25
Are provided. A pair of first release agent blowing nozzles 2
As shown in FIG. 4, 5 is installed above both side edges of the fiber mat 12, and the release agent is sent through the hoses 26 and 27. In this embodiment, the tips of the hoses 26 and 27 are fixed downward, and the hoses 26 and 27 are fixed to the first release agent blowing nozzle 25.
However, the first release agent blowing nozzle 25 may be configured as a separate part from the hoses 26 and 27. The hoses 26 and 27 are connected to a pump 28 for discharging the release agent. The flow rate of the release agent blown out from each of the release agent blowing nozzles 25 is adjusted by an operation valve 29 provided in the middle of the hoses 26 and 27. , 30.

On the other hand, the release agent spraying device 24 includes a conical rotating body 31 located above the center of the fiber mat 12 in the width direction.
And a funnel-shaped cup 32 located directly above the rotating body 31
And a shaft 33 that supports the rotating body 31 is rotatably supported on the main body frame 34 via bearings 35 and 36. As shown in FIG. 5, the shaft 33 vertically passes through the center of the funnel-type cup 32, and the release agent passes through the gap between the shaft 33 and the lower end opening 37 of the funnel-type cup 32. It flows naturally into the center. The opening diameter of the lower end opening 37 of the funnel-type cup 32 (the natural flow amount of the release agent) is set so that the release agent can be spread over the entire surface of the fiber mat 12.

A long hole 44 is formed in the support plate 43 for supporting the funnel-shaped cup 32, and a bolt 45 inserted in the long hole 44 is screwed into a screw hole 47 of a mounting plate 46 fixed to the main body frame 34. , The funnel-shaped cup 32 is fixed to the main body frame 34. Therefore, by loosening the bolt 45 and adjusting the height position of the funnel-shaped cup 32 up and down along the elongated hole 44, the gap G between the lower end opening 37 of the funnel-shaped cup 32 and the rotating body 31 is adjusted. Thus, the flow rate of the release agent (paraffin solution) flowing out from the gap G can be adjusted. The supply of the release agent into the funnel type cup 32 is performed by the pump 28 (FIG. 4).
) Through a hose 38 connected to the pump. Further, a motor 39 for driving the rotating body 31 is fixed to the main body frame 34 and includes a driving pulley 40 fitted to the rotating shaft of the motor 39 and a driven pulley 41 fitted to the shaft 33 of the rotating body 31. A belt 42 is stretched between them.

According to the embodiment constructed as described above, a fiber mat 12 made by making a wood fiber slurry by a paper making machine 11 is conveyed by a developing conveyor 13. During this conveyance, the release agent is sprayed from the first release agent blowing nozzle 25 to both side edges of the fiber mat 12 so that both sides of the fiber mat 12 are sufficiently soaked with the release agent. Further, the mold release agent is poured from the hose 38 into the funnel-type cup 32, and the mold release agent is accumulated in the funnel-type cup 32 while the lower end opening 37 is formed.
Then, the release agent is allowed to flow naturally to the central portion of the rotating body 31 that rotates at a high speed. As a result, the release agent that has flowed down onto the rotating body 31 is dispersed toward the outer peripheral direction of the rotating body 31 by centrifugal force and becomes a mist or a shower while being evenly distributed on the surface of the fiber mat 12. Therefore, the fiber mat 12
Is passed below the rotating body 31 and the first release agent blowing nozzle 25, so that the surface and both side edges are sufficiently coated with the release agent.

The fiber mat 12 whose surface and both side edges are coated with the release agent in this manner is a cutter traveling frame 14.
Is cut by high-pressure water jetted from a cutter 22 traveling in the direction of arrow A in FIG. At this time, the cutter 22
Along with the cutter traveling frame 14, the second release agent blowing nozzle 23 travels in the direction of the arrow A in FIG. 1 and separates from the second release agent blowing nozzle 23 to the cut portion of the fiber mat 12. The release agent is sufficiently applied to the cut portion of the fiber mat 12 by spraying the release agent. After the cutting is completed, the cutter 22 stops spraying the high-pressure water and returns to the cutting start position.
From the end of the cutting to the start of the next cutting, the blowing of the release agent from the second release agent blowing nozzle 23 is also stopped.

The fiber mat 12 cut to a certain size as described above is conveyed to a press forming step, and as shown in FIG. 6, the fiber mat 12 is placed on a conveying plate 51 via a drainage wire mesh 52. And set in a multi-stage press.
While pressing the transfer plate 51 with the hot plates 55 and 56, the mold plate 54 is pressed down and press-molded as shown in FIG. 7 to squeeze out moisture from the fiber mat 12 and to remove the heat contained in the fiber mat 12. The curable adhesive is cured to bond and integrate the fibers of the inner layer to produce a hard fiberboard.

In this case, the fiber mat 12 is formed at the time of press molding.
Even if there is a situation in which the four sides of the four sides spread and spread to the outer periphery, the adhesive force of the fibers on the four sides becomes weak, the release agent spraying device 24 and the first and second release agents are blown out. Nozzle 25,
23, a sufficient amount of the release agent is infiltrated into the entire surface of the fiber mat 12 and the entire periphery of the four sides. The mold release from the plate 54 is improved, and it is possible to prevent the fibers of the fiber mat 12 (particularly, the four-sided fibers) from sticking to the template 54 and peeling off. In addition, the release agent that has permeated all around the four sides of the fiber mat 12 is
Pressed fiber mat 12
When the (hard fiber board) is peeled off from the wire mesh 52, the fiber mat 12 (hard fiber board) is
The fiber mat 12 can be prevented from sticking to the wire mesh 52 and peeling off. For this reason, it is possible to manufacture a smooth hard and high-quality hard fiber board having no stain, and to significantly reduce the number of times of removing the fibers from the template 54 and the wire mesh 52 as compared with the related art, thereby improving the productivity.

By the way, when the release agent spraying device for spraying the release agent on the surface of the fiber mat 12 is configured as a spray system for spraying the release agent in a mist form from a number of minute spray holes,
The spray holes are likely to be clogged and the release agent is likely to be unevenly spread. In addition, the discharge pressure of the release agent needs to be high, and the structure of the release agent supply system becomes expensive.

In this regard, according to the above embodiment, the release agent is allowed to flow naturally from the lower end opening 37 of the funnel type cup 32 to the center of the upper surface of the rotating body 31 which rotates at a high speed.
The centrifugal force causes the release agent on the rotator 31 to spread toward the outer periphery while being spread toward the outer periphery, so that a spray hole that causes clogging is unnecessary,
It is possible to spray the release agent stably for a long time. In addition, the release agent may be poured into the funnel-type cup 32, and the release agent may be allowed to naturally flow down from the lower end opening 37 of the funnel-type cup 32 to the center of the upper surface of the rotating body 31. There is no need to increase the release agent discharge pressure, the structure of the release agent supply system is simple, and an inexpensive configuration is sufficient.

However, in the present invention, the release agent spraying device 24 may be of a spray type, and in this case, the intended object of the present invention can be sufficiently achieved. Further, in the above embodiment, the rotating body 31 is formed in a conical shape. However, the rotating body 31 may be formed in another shape such as a disk, or a means (protrusion) for promoting the diffusion of the release agent on the surface of the rotating body 31. Parts, recesses, etc.) may be formed.

In the above embodiment, the release agent spraying device 24 is provided behind the cutter traveling frame 14 (on the side of the paper machine 11).
And the first release agent blowing nozzle 25 are arranged so that the surface and both side edges of the fiber mat 12 are coated with the release agent before the cutting of the fiber mat 12.
A release agent spraying device 24 and a first release agent blowing nozzle 25 may be arranged in front of the fiber mat 12 so that the release agent is applied to the surface and both side edges after the fiber mat 12 is cut.

[0022]

As is apparent from the above description, according to the first aspect of the present invention, the entire surface of the fiber mat is controlled by the release agent spraying device and the first and second release agent blowing nozzles. In addition, a sufficient amount of release agent can be impregnated into the entire circumference of the four sides, and the mold release during press molding of the fiber mat can be improved. In addition to being able to be manufactured, the number of times of removing the fibers from the template or the wire mesh can be significantly reduced as compared with the related art, and the productivity can be improved.

Further, in the second aspect of the present invention, the release agent spraying device spontaneously flows the release agent from the lower end opening of the funnel type cup to the rotating body which rotates at high speed, and diffuses the release agent by centrifugal force of the rotating body. As it is configured to be sprayed on the surface of the fiber mat while being made, there is no clogging of the spray holes as in the past, and it is possible to spray the release agent stably for a long time,
There is no need to increase the release agent discharge pressure of the release agent supply system, and the structure of the release agent supply system can be made inexpensive.

[Brief description of the drawings]

FIG. 1 is a top view of a fiber mat production line showing one embodiment of the present invention.

FIG. 2 is a side view of a fiber mat production line.

FIG. 3 is a perspective view of a cutter traveling frame portion.

FIG. 4 is a longitudinal sectional view taken along the line IV-IV in FIG. 1;

FIG. 5 is a longitudinal sectional view of a main part of the release agent spraying device.

FIG. 6 is a longitudinal sectional view showing a state in which a fiber mat is set in a multi-stage press.

FIG. 7 is a longitudinal sectional view showing a state in which a fiber mat is pressed by a multi-stage press.

[Explanation of symbols]

11 paper machine, 12 fiber mat, 13 deployment conveyor, 14 cutter traveling frame, 17 chain, 1
9 slide member, 22 cutter, 23 second release agent blowing nozzle, 24 release agent spraying device, 25 first release agent discharge nozzle, 26, 27 hose, 28 pump
31: rotating body, 32: funnel cup, 33: shaft,
37 ... lower end opening, 38 ... hose, 39 ... motor, 51 ...
Conveyance plate, 52: wire mesh, 54: template, 55, 56: hot plate.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) D21F 1/00-13/12 D21J 1/00-3/12

Claims (2)

(57) [Claims] 1. A fiber mat continuously conveyed on a developing conveyor from a paper machine is cut into a predetermined size by a cutter traveling across the developing conveyor, and the cut fiber mat is heated. In a fiberboard manufacturing apparatus that manufactures a fiberboard by press-molding a molded template, a release agent spraying apparatus that is disposed on the development conveyor and sprays a release agent on the surface of the fiber mat that is conveyed. A pair of first release agent blowing nozzles disposed above both sides of the developing conveyor and spraying a release agent on both side edges of the fiber mat being conveyed; A fiberboard manufacturing apparatus, comprising: a second release agent blowing nozzle for blowing a release agent onto a cut portion of the mat. 2. The release agent spraying device includes a funnel-type cup into which the release agent is poured, and a rotating body that rotates at a high speed below the funnel-type cup. Is caused to spontaneously flow down to the center of the upper surface of the rotator, whereby the release agent is diffused around by centrifugal force caused by the rotation of the rotator and is dispersed on the surface of the fiber mat. The fiberboard manufacturing apparatus according to claim 1, wherein: