JP2001113509A - Fiber board manufacturing device and method for manufacturing the board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for manufacturing a fiber board obtained by thermally pressing a matlike composition comprising a granulelike or fibrous raw material, and a heat-curable resin and a radical initiator added to the raw material as well as a method for manufacturing the fiber board. SOLUTION: This fiber board manufacturing device is structured of a supply conveyor 15, prepressing means 16a, 16b, hot pressing rollers 17a, 17b, a carry- out conveyor 18 and radical density control means 19a, 19b arranged in the conveying direction of a raw material before/after the hot pressing rollers 17a, 17b. Further, the device hot-presses a matlike composition 14 obtained by adding a heat-curable resin and a radical initiator to a granulelike or fibrous raw material, into a fiber board. The method for manufacturing the fiber board is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to the production of fiberboard, and more particularly, to hot-pressing a composition containing a powdery or fibrous raw material, a thermosetting resin, and a radical initiator. The present invention relates to a fiberboard manufacturing apparatus and a fiberboard manufacturing method used for forming a fiberboard.

[0002]

2. Description of the Related Art From the viewpoints of effective use of forest resources and effective use of waste materials, powdery materials obtained from waste materials such as wood chips, planers, rice ears, and used paper such as newsprint and copy paper have been used. Attempts have been made to produce plate materials for use in dams and the like and fiberboards for boards by using a fibrous wood fiber as a raw material, adding a thermosetting resin to the raw material, and applying heat and pressure. -32340
No. 8 and JP-A-6-63912.

[0003] The thermosetting resin added when producing the above-mentioned fiberboard is used for binding fibrous raw materials to give necessary strength. The strength of the fiberboard improves as the amount of thermosetting resin added increases,
On the other hand, thermosetting resins are significantly more expensive than raw materials, which increases the production cost of fiberboard.

As an attempt to reduce the amount of the thermosetting resin to be added and to improve the strength of the fiberboard to be manufactured, it has been proposed to manufacture a fiberboard by adding a radical initiator to the thermosetting resin. No. 240032. By adding a radical initiator to the thermosetting resin, in addition to the curing reaction itself of the thermosetting resin, it becomes possible to promote curing by active radicals generated from the radical initiator, and as a result, It is possible to obtain sufficient strength even with a small amount of thermosetting resin.

The above-mentioned radical initiator is decomposed by thermal energy applied by a heating means such as a hot-press roll used in the production of a fiberboard to generate active radicals, which are the main components of the thermosetting resin. It is considered that the curing of the thermosetting resin is further promoted by attacking the chain structure to generate radicals.

Although the radical initiator can effectively improve the strength of the fiberboard by being used together with the thermosetting resin as described above, if the added amount is too large, (1) the residual unreacted In some cases, it is difficult to stabilize the quality of the produced fiberboard over a long period of time due to the reaction of the initiator of (2), (2) the degradable products generated by the decomposition of the radical initiator (3) Use radical initiators as little as possible because radical initiators have the disadvantage that they are relatively reactive and mass handling at work sites is inconvenient for safety. Is preferred.

However, reducing the amount of the radical initiator also reduces the strength of the fiberboard provided by the above-mentioned thermosetting resin. For this reason, it is necessary to manufacture a fiberboard while using the added radical initiator and active radicals generated from the radical initiator as effectively as possible.

[0008] As shown in FIG.
Is manufactured by heating and pressurizing a mat-like composition containing raw materials, a thermosetting resin, and a radical initiator by pressurizing presses 50a and 50b. At this time, when the radical initiator and active radicals generated from the radical initiator are heated and pressed in the direction of arrow D by heating / pressing means such as heating presses 50a and 50b, various kinds of heat and pressure are generated. It tends to dissipate from the heat and pressure region together with the gas as shown by the arrow E. Therefore, in order to impart a predetermined strength to the conventional fiberboard 51, it is necessary to add a radical initiator more than originally required. Therefore, as described above, the conventional fiberboard 51 has various inconveniences such as quality, quality stability, and inconvenience in work. Therefore, a manufacturing apparatus and a manufacturing method for manufacturing a fiberboard having a sufficient strength from a composition containing a fibrous raw material, a thermosetting resin, and a radical initiator have been required.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and the present invention provides a method for maintaining high quality for a long period of time and handling a large amount of a radical initiator. Fiberboard manufacturing apparatus and fiberboard used to provide a fiberboard having sufficient strength without causing inconvenience and using a radical initiator and active radicals generated from the radical initiator as effectively as possible It is an object of the present invention to provide a production method of

[0010]

The above objects of the present invention can be attained by providing a fiberboard manufacturing apparatus and a fiberboard manufacturing method according to the present invention. That is, according to the invention of claim 1 of the present invention, a method for hot-pressing a mat-like composition in which a thermosetting resin and a radical initiator are added to a granular or fibrous raw material to produce a fiberboard. A device,
The manufacturing apparatus is a supply conveyor for supplying the mat-shaped composition to the manufacturing apparatus, a pre-press unit for pre-pressing the mat-shaped composition, and a hot-press for the pre-pressed mat-shaped composition. A hot-press roller,
A fiber comprising: an unloading conveyor for unloading the fiberboard; and radical concentration control means disposed upstream and downstream of the hot-press roller along the conveying direction of the mat composition. An apparatus for manufacturing a plate is provided.

According to the invention of claim 2 of the present invention, the radical concentration control means is provided on the upstream side in the conveying direction of the mat-like composition so as to cover the pre-pressed mat-like composition. A cover, and a downstream cover provided with an abutting portion that abuts on the fiber board in the width direction on the downstream side in the transport direction of the hot-press roller and a covering member that covers the fiber board. Is provided.

According to a third aspect of the present invention, there is provided an apparatus for manufacturing a fiberboard, wherein the contact portion is a blade formed of heat-resistant rubber.

According to a fourth aspect of the present invention, there is provided an apparatus for manufacturing a fiberboard, wherein the contact portion is a roller which abuts on an upper surface of the fiberboard.

According to the invention of claim 5 of the present invention, a mat-like composition in which a thermosetting resin and a radical initiator are added to a granular or fibrous raw material is hot-pressed into a fiberboard. A method of manufacturing, comprising: supplying the mat-like composition to a supply conveyor from a composition preparing device, pre-pressing the mat-like composition conveyed by the supply conveyor, and pre-pressing the mat-like mat. A method for producing a fiberboard, characterized in that the composition is heat-pressed under radical concentration control to form the fiberboard, and the hot-pressed fiberboard is discharged by a carry-out conveyor.

According to the invention of claim 6 of the present invention, the radical concentration is controlled by an upstream cover disposed upstream of the mat-shaped composition in the conveying direction so as to cover the pre-pressed mat-shaped composition. And a radical concentration control unit including a contact portion that contacts the fiber board in the width direction on the downstream side in the transport direction of the hot-press roller and a downstream cover provided with a covering member that covers the fiber board. There is provided a method for producing a fiberboard as described above.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing an entire production line used when producing the fiberboard of the present invention. The production line shown in FIG. 1 used in the present invention is for producing fiberboard by a dry method. In the storage tank 1 of the production line, fibers made mainly of cellulose, such as waste wood such as wood chips, wood chips, rice ear chips, newsprint and copy paper, which are made into powdery or fibrous raw materials by defibration processing. Quality waste material is stored. After a predetermined amount of the waste material is weighed from the storage tank 1 by the weighing device 2, the waste material is supplied to the boiling can 4 via the supply device 3 and subjected to the steaming process.

The waste material subjected to the steaming treatment by the boiling can 4 is supplied to a hopper 6 through a pipe 5 by a screw conveyor provided in the boiling can 4, and further supplied to the hopper 6.
Defibrator 8 called a refiner by conveyor 7
And the defibration process is performed. By this defibration treatment, the waste material is turned into a powdery or fibrous raw material. As the defibrator 8 used for this purpose, for example, # 400 Bauer Dou
A dry single-stage defibrillator such as ble Disk Refiner can be used. A thermosetting resin and a radical initiator are supplied from a thermosetting resin supply device 9 and a radical initiator supply device 10 in addition to the steamed waste material from a supply port of the defibrating machine 8 to perform a defibration process. At the same time, by mixing the thermosetting resin and the radical initiator, a composition containing the powdery or fibrous raw material, the thermosetting resin, and the radical initiator is produced.

Examples of the above-mentioned thermosetting resin include phenol resins such as novolak and resol phenol, urea resins and melamine resins. Also,
Examples of the above-described radical initiator include 2,2'-azobisisobutyronitrile and the like.

The composition containing the powdered or fibrous raw material discharged from the defibrating machine 8 is sent to an air-flow drier 11 where the composition is dried to have a water content of about 14% or less. Preferably, it is 6 to 10% (by weight). The composition thus flash-dried is sent to a felter 12, blown out from the tip of a pendulum type nozzle provided on the top of the felting box, and suction-formed on a wire mesh belt 13 to form a mat-like composition. It is set to 14. The mat-shaped composition 14 is scraped off by a shave-off roll to control the thickness.
The mat composition 14 is supplied from the lower part of the felter 12 to the fiberboard manufacturing apparatus of the present invention while being placed on the wire mesh belt 13.

FIG. 1 further shows a fiberboard manufacturing apparatus according to the present invention. The fiberboard manufacturing apparatus of the present invention includes:
Supply conveyor 15, prepress means 16a, 16b
, Hot-press rollers 17a, 17b, and unloading conveyor 18
And radical concentration control means 19a and 19b. The supply conveyor 15 is a mat-like composition 1 containing the above-described raw materials, a thermosetting resin, and a radical initiator.
4 is supplied to the prepress means 16a and 16b, and in FIG.
It is provided separately. However, in the present invention, the wire mesh belt 13 is extended, and both the mat-like composition 14 and the wire mesh belt 13 are connected to the prepress means 16a, 16b.
It is also possible to pre-press the mat-shaped composition 14 by pressing the mat-shaped composition 14 between them, and in this case, it is also possible to use the wire mesh belt 13 as the supply conveyor 15.

FIG. 2 is a sectional view of the production line shown in FIG.
It is the figure which expanded and showed the manufacturing apparatus part of the fiberboard of this invention. In the embodiment shown in FIG. 2, the wire mesh belt is passed between the prepressing means 16a and 16b so that the wire mesh belt can be shared as the supply conveyor 15.
It has been. As shown in FIG. 2, the mat-like composition 14 is conveyed by the supply conveyor 15 in the direction of arrow A. Downstream of the supply conveyor 15, there are provided prepress means 16a, 16b, which in the embodiment shown in FIGS. 1 and 2 comprise two prepress rollers 16a, 16b. Is shown. In the present invention, the prepress means 16a and 16b apply a predetermined pressure to the mat composition 14 conveyed by the supply conveyor 15, thereby pressing the mat composition 14 to a predetermined thickness. The prepress means 16a and 16b can be heated. Further, as the above-mentioned prepress means, a pair of prepress means 16a,
It is also possible to perform a predetermined compression by combining a plurality of 16b.

Heat pressure rollers 17a and 17b are provided downstream of the prepress means 16a and 16b, and the mat-shaped composition 14 having a predetermined thickness is further pressed by the prepress means 16a and 16b and heated. By hot-pressing the mat-shaped composition 14 containing the raw materials, the thermosetting resin, and the radical initiator, the thermosetting resin and the radical initiator react with each other to form the fiberboard 20 having a predetermined thickness. I have. The hot-press rollers 17a and 17b are composed of metal rollers 21a and 21b and the metal rollers 21a and 21b.
Heat-resistant rubber layers 22a, 22 attached circumferentially to the surface of
b) so that sufficient pressure and heat can be applied to the pre-pressed mat-like composition 14. As the heating means for the hot-press rollers 17a and 17b, any conventionally known means can be used. Specifically, for example, when heating the hot-press rollers 17a and 17b, it is possible to arrange a resistance heating element in the metal rollers 21a and 21b and to heat from inside the metal rollers 21a and 21b. A sheet-like heating element having a heating element embedded in conductive rubber is used as a heat-resistant rubber layer 22a.
It may be used as 22b and heated from the surface of the metal roller.

The hot-press rollers 17a and 17b in the fiberboard manufacturing apparatus of the present invention
Temperature of 10 ° C. to 260 ° C., and 10 to 150 kgf / c
As long as a linear pressure corresponding to a pressure of about m ² can be applied, any conventionally known metal roller, heating means, and heat-resistant rubber can be used. In FIG. 2, a pair of hot-press rollers 17a and 17b is used. However, in the present invention, a plurality of pairs are formed so that the mat-shaped composition 14 can be sufficiently pressed and heated. It is also possible to use a hot-press roller. An unloading conveyor 18 is provided downstream of the hot-press rollers 17a and 17b in the conveying direction, and the fiber board 20 formed by hot pressure is further conveyed to a cutting device such as a slitter (not shown). I have.

As shown in FIG. 2, in the fiberboard manufacturing apparatus of the present invention, radical concentration control means is provided on the upstream side and the downstream side in the transport direction of the above-mentioned hot-press rollers 17a and 17b. . This radical concentration control means is composed of an upstream cover 19a and a downstream cover 19b, and converts active radicals generated by the thermal energy applied by the hot-press rollers 17a, 17b to a mat-like composition as much as possible. 14 or near the high-temperature region of the fiberboard 20.

Further, as shown in FIG. 2, in the fiberboard manufacturing apparatus of the present invention, the mat-like composition 14 conveyed by the supply conveyor 15
It is prepressed by a and 16b and pressed to a predetermined thickness. Next, the fiber board 20 having a predetermined thickness is formed by passing through the upstream cover 19a installed on the upstream side in the transport direction of the hot-press rollers 17a and 17b and the hot-press rollers 17a and 17b. The fiberboard 20 is provided with hot-press rollers 19a and 19b.
Is further transported downstream in the transport direction through a downstream cover 19b provided on the downstream side. As mentioned above, 2
By performing the pressing at the stage, the fiberboard of the present invention can be uniformly pressed and the quality of the manufactured fiberboard can be improved. It is preferable to use a means such as a side roller (not shown) on both sides of the above-described prepress means 16a and 16b and the hot-press rollers 17a and 17b so that the press-fastening can be surely performed from the lateral direction.

An upstream cover 19a constituting a radical concentration control means used in the fiberboard manufacturing apparatus of the present invention;
The downstream cover 19b is, as shown in FIG.
The holding stay 23 is supported from an appropriate position such as a fixed portion of the fiberboard manufacturing apparatus of the present invention or a floor surface in work equipment.

FIG. 3 shows the upstream cover 19a of the radical concentration control means of the fiberboard manufacturing apparatus of the present invention shown in FIG.
FIG. 3 is a perspective view showing an arrangement of the first embodiment. FIG. 3 omits the downstream cover 19b used for the radical concentration control means. As shown in FIG. 3, the upstream cover 19 used in the radical concentration control means of the present invention.
a is arranged on the upstream side of the hot-press rollers 17a and 17b,
The mat-like composition 14 placed on the supply conveyor 15 is completely covered, and furthermore, both sides 14 of the mat-like composition 14
a, 14b and the upper side surface 14c of the mat-shaped composition 14 without hindering the conveyance of the mat-shaped composition 14 and without deteriorating the surface properties or the like of the pre-pressed mat-shaped composition 14. As shown in FIG.
4b and 24c are provided. However, from the viewpoint of keeping the heat and pressure conditions such as temperature and moisture in the heat and pressure region constant and preventing the quality of the fiberboard 20 from deteriorating due to dust or the like, the above-mentioned separation is performed at both ends 14a of the mat-like composition , 14b, and the upper side surface 14c.

As described above, the upstream cover 19a releases the gas generated by the heat pressure by the heat pressure rollers 17a and 17b between the space defined by the upstream cover 19a and the outside. I have. Active radicals generated from the radical initiator are supplied to the hot-press rollers 17a, 1
After the heating by 7b, the mat-like composition 14 is mainly generated after passing through the hot-press rollers 17a and 17b. Therefore, even if the upstream cover 19a is opened to the outside as described above, the viewpoint of controlling the concentration of radicals. This makes it possible to escape gas such as water vapor generated from moisture contained in the mat-like composition 14 instead. Hot-press rollers 17a, 17 of upstream cover 19a
If the end on the side b is arranged so as not to hinder the rotation of the hot-press rollers 17a, 17b, the hot-press rollers 17a, 1b
It may extend so as to cover 7b.

FIG. 4 is a perspective view of the downstream cover 19b constituting the radical concentration control means used in the fiberboard manufacturing apparatus of the present invention shown in FIG. 2 as viewed from the downstream side in the transport direction. In FIG. 4, the upstream cover 19a is omitted. The downstream cover 19b used in the present invention includes:
Both ends 20 of the fiberboard 20 are similar to the upstream cover 19a.
A predetermined distance 25a, 25b is provided so as not to hinder the transport of the fiberboard 20 from the a, 20b. The separations 25a and 25b described above are
As described in a, it is preferable that the distance be within 10 cm.

As shown in FIG. 4, the downstream side cover 19
b is a covering member 26 for covering the fiberboard 20;
And a contact portion 27 that abuts on the contact portion 27. In FIG. 4, the contact portion 27 of the downstream cover 19 b is provided with the downstream cover 19 b extending substantially orthogonal to the transport direction of the fiberboard 20.
It is shown that a blade 29 is disposed and configured at the end 28. This blade 29 is
Abuts on the upper side surface 20c of the heat-pressure rollers 17a, 17b.
On the downstream side, the hermeticity of the downstream cover 19b is improved. By improving the hermeticity in this way, active radicals generated by heating the hot-press rollers 17a and 17b can be retained not only inside the fiberboard 20 but also within a limited space outside the fiberboard 20. The curing reaction not only from the inside of the fiberboard 20 but also from the surface of the fiberboard 20 is promoted, and the active radicals generated from the radical initiator can be more effectively used.

Further, by employing the above-described structure of the downstream cover 19b, the high-temperature, high-pressure gas generated downstream of the hot-press rollers 17a and 17b allows the downstream cover 1 to be used.
Due to the synergistic effect of purging the air inside 9a, the quenching of active radicals by oxygen (O ₂ ) contained in the air is efficiently prevented downstream of the hot-press rollers 17a, 17b. It is possible to manufacture a high-quality fiberboard 20 even if the amounts of the thermosetting resin and the radical initiator are reduced.

When the fiberboard 20 having the same strength is obtained, the addition amount of the thermosetting resin and the radical initiator which are relatively expensive among the components of the fiberboard 20 can be reduced. Therefore, the manufacturing cost of the fiberboard 20 can be reduced as a whole. Downstream cover 19
b, on the side of the heat-pressure rollers 17a and 17b, as in the case of the above-mentioned upstream cover 19a,
a, 17b, or may extend above the hot-press rollers so as not to hinder the rotation of the hot-press rollers 17a, 17b.

FIG. 5 is a cross-sectional view of the downstream cover 19b used in the present invention taken along the transport direction in FIG. 4, and the contact portion 27 on the downstream side in the transport direction is enlarged to show the radical concentration used in the present invention. It is sectional drawing which showed the Example of the downstream side cover 19b of the control means in detail.

FIG. 5A shows the first cover 19b of the downstream cover 19b.
FIG. 5B shows a second embodiment of the downstream cover 19b. As shown in FIG. 5A, in the first embodiment of the downstream cover 19b, the downstream cover 1
The contact portion 27 that comes into contact with the upper side surface 20c of the fiberboard 20 of 9b is formed by a blade 29 made of heat-resistant rubber. As the heat-resistant rubber, for the purpose of withstanding high temperatures and not easily deteriorating to the generated radicals, and for the purpose of not adversely affecting the surface properties of the fiberboard 20 and the transportability, It is preferably formed from a material such as silicone rubber or fluoro rubber. The heat resistant rubber forming such a contact portion 27 can be attached to the downstream cover 19b by various methods such as a bolt, a nut, an adhesive, and an adhesive tape.

FIG. 5B is a view showing another embodiment of the downstream cover 19b used in the present invention. As shown in FIG. 5 (b), the second
The downstream cover 19b of the embodiment of FIG.
The contact portion 27 is formed by the surface touch roller 30 rotatably held on the side of the covering member 26 of FIG. 2B, and the shielding property of the space downstream of the hot-press rollers 17a and 17b is improved. At the same time, the surface property of the manufactured fiberboard 20 is not adversely affected, and the transportability of the fiberboard 20 is not reduced. Downstream cover 1 shown in FIG.
9b is a metal touch roller,
A metal roller covered with a heat-resistant rubber or the like can be used. Further, by heating the surface touch roller 30, it is possible to further perform post-curing, so that the radical initiator and the active radical can be more effectively used.

FIG. 6 shows a downstream cover 19 used in the present invention.
FIG. 9 is a view showing a third embodiment of the contact portion 27 of FIG. In the third embodiment of the downstream cover 19b, the surface touch roller 3
0 is cantilevered and rotatably held by a member such as a cantilever 31 having one end movably attached to the side of the covering member 26 of the downstream side cover 19 b, and according to the thickness of the fiberboard 20. While rotating in the direction of arrow B, it moves up and down in the direction of arrow C. The cantilever 31 may be provided with a biasing means (not shown). In addition to the weight of the surface touch roller 30, the upper surface 2 of the fiberboard 20 may be used.
It is also possible to adjust the pressing force with respect to 0c. Further, as described with reference to FIG.
Can be heated at the same time.

In the fiberboard production line of the present invention,
Further, a slitter for cutting the fiber board 20 as necessary, a pressure press for performing post-curing as needed, or the like can be used downstream of the discharge roller 18.

Although the present invention has been described with reference to the embodiments, the supply conveyor, the hot-press roller, the carry-out roller, and the radical concentration control means may have any structure and / or configuration as long as the effects of the present invention can be obtained. It goes without saying that materials, dimensions and shapes can be used.

[0039]

According to the first aspect of the present invention, a fiberboard which can maintain high quality for a long period of time, does not cause inconveniences such as handling a large amount of radical initiator, and has sufficient strength. Can be provided.

According to the second aspect of the present invention, there is provided an apparatus for manufacturing a fiberboard, which enables a radical initiator and active radicals generated from the radical initiator to be used as effectively as possible. Becomes possible.

According to the third aspect of the present invention, there is provided an apparatus for manufacturing a fiberboard capable of sufficiently retaining radicals in a downstream region of a hot-press roller.

According to the fourth aspect of the present invention, there is provided a fiberboard manufacturing apparatus capable of sufficiently retaining radicals in the downstream region of the hot-press roller and capable of performing post-heating. You.

According to the invention of claim 5 of the present invention, there is provided a fiberboard which can maintain high quality for a long period of time, does not cause inconvenience in handling a large amount of radical initiator, and has sufficient strength. It is possible to provide a method for producing a fiberboard used for the above.

According to the invention of claim 6 of the present invention, there is provided a method for producing a fiberboard, which enables a radical initiator and active radicals generated from the radical initiator to be used as effectively as possible. Becomes possible.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a production line for a fiberboard used in the present invention.

FIG. 2 is a diagram showing a fiberboard manufacturing apparatus of the present invention.

FIG. 3 is a diagram showing an upstream cover of a radical concentration control means used in the fiberboard manufacturing apparatus of the present invention.

FIG. 4 is a diagram showing a downstream cover of a radical concentration control means used in the fiberboard manufacturing apparatus of the present invention.

FIG. 5 is a diagram showing a detailed portion of a downstream cover of the present invention.

FIG. 6 is a diagram showing a detailed portion of a downstream cover according to the present invention.

FIG. 7 is a diagram showing dissipation of radicals in a conventional pressure pressing process.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Storage tank 2 ... Weighing device 3 ... Supply device 4 ... Boiler 5 ... Piping 6 ... Hopper 7 ... Conveyor 8 ... Fibrillation machine 9 ... Thermosetting resin supply device 10 ... Radical initiator supply device 11 ... Air flow type dryer DESCRIPTION OF SYMBOLS 12 ... Felter 13 ... Wire mesh belt 14 ... Mat composition 14a, 14b ... Mat composition side part 14c ... Mat composition upper surface 15 ... Supply conveyor 16a, 16b ... Prepress means 17a, 17b ... Hot pressure means 18 ... Unloading conveyor 19a ... upstream cover 19b ... downstream cover 20 ... fiberboard 20a, 20b ... fiberboard side 20c ... fiberboard upper side 21a, 21b ... metal roller 22a, 22b ... heat-resistant rubber layer 23 ... holding stay 24a, 24b, 24c: Separation 25a, 25b: Separation 26: Covering member 27: Contact portion 28: Downstream cover end 29: Blade 30 ... surface touch roller 31 ... cantilever

Claims (6)

[Claims] 1. A manufacturing apparatus for hot-pressing a mat-like composition obtained by adding a thermosetting resin and a radical initiator to a powdery or fibrous raw material to form a fiber board, wherein the manufacturing apparatus is A supply conveyor for supplying the mat-shaped composition to the manufacturing apparatus, a pre-press unit for pre-pressing the mat-shaped composition, and a hot-press roller for hot-pressing the pre-pressed mat-shaped composition. An unloading conveyor for unloading the fiberboard, and a radical concentration control unit disposed upstream and downstream of the hot-press roller along the conveying direction of the mat-shaped composition. Fiberboard manufacturing equipment. 2. The method according to claim 1, wherein the radical concentration control means includes an upstream cover disposed on an upstream side in a conveying direction of the mat-shaped composition so as to cover the pre-pressed mat-shaped composition, and a conveying direction of the hot-press roller. The fiberboard according to claim 1, further comprising: a downstream portion provided with an abutting portion that abuts on the fiberboard in a width direction on a downstream side and a covering member that covers the fiberboard. Manufacturing equipment. 3. The fiberboard manufacturing apparatus according to claim 2, wherein said contact portion is a blade formed of heat-resistant rubber. 4. The fiberboard manufacturing apparatus according to claim 2, wherein the contact portion is a roller that comes into contact with an upper surface of the fiberboard. 5. A method for hot-pressing a mat-like composition obtained by adding a thermosetting resin and a radical initiator to a powdery or fibrous raw material to form a fibrous board, the manufacturing method comprising: Supplying the mat-like composition from a composition preparing device to a supply conveyor, pre-pressing the mat-like composition conveyed by the supply conveyor, and hot-pressing the pre-pressed mat-like composition under radical concentration control. Producing the fiberboard by heating, and discharging the hot-pressed fiberboard by a carry-out conveyor. 6. The control of the radical concentration includes an upstream cover disposed on the upstream side in the transport direction of the mat-like composition so as to cover the pre-pressed mat-like composition, and a downstream side in the transport direction of the hot-press roller. And a downstream cover provided with a contact portion that abuts the fiber board in the width direction on the side and a covering member that covers the fiber board. 6. The method for producing a fiberboard according to item 5.