JP2005048295A - Foaming apparatus for fiber mat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a forming apparatus for a fiber mat designed to uniformize a fiberboard by setting the relationship between the density and the thickness of formed mat. <P>SOLUTION: A nipping belt 16 having protrusively installed blades 19, 19a coming into contact with the upper part of a deposit (m) at a constant interval are supported with freely rotatable rollers 18, 18a in the upper part on the downstream side of a transporting conveyor 5 and the traveling direction of the nipping belt 16 is the direction to rake back the upper part of the deposit (m) contacting the blades 19, 19a to the upstream side. The tip height of the blades 19, 19a is formed lower toward the side of both ends. Thereby, the thickness of the side of both the ends having a low density of the deposit (m) is set high. As a result, a board MM is produced from a mat M in which the amount of a deposited raw material R is uniformized in the width direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fiber mat forming apparatus for forming fibers into a mat having an appropriate thickness.
[0002]
[Prior art]
Conventionally, a forming device for depositing fibers to an appropriate thickness and forming it into a mat shape is slidable back and forth with respect to the lower conveyor belt suspended on a plurality of rollers supported in the chamber. An upper conveyor belt suspended by a plurality of rollers supported by a sliding frame disposed on the upper surface of the chamber, and a raw material supply tank installed on the upper surface of the chamber. The lower conveyor belt and the upper conveyor A slanting forming section is formed between the belt and the belt, and a raw material supply port is provided on the upper surface of the raw material supply tank, and a raw material discharge port is provided on a side surface. There has been known a forming apparatus in which a plurality of raw material leveling rolls are arranged side by side in the raw material supply tank in communication with the chamber through an opening directly above the conveyor belt (example) If, see Patent Document 1).
[0003]
A raw material supply tank with a stirrer is connected to the raw material supply port of the forming apparatus via a raw material supply path, and a blower is interposed in the raw material supply path to blow the raw material which is a mixture of various fibers. Is dropped from the raw material supply tank onto the upper conveyor belt through the opening, and the raw material leveling roll prevents the raw material from forming a block and forms a forming section between the lower conveyor belt and the upper conveyor belt. The density and composition were made uniform in the flow direction.
[0004]
However, even if the raw material that is stirred and blown has uniformity, it has a tendency to deposit mainly in the center side when it is supplied into the raw material supply tank or dropped on the upper conveyor belt. Even if the material is leveled by the material leveling roll, the tendency to be biased remains. Also, in the density showing the same tendency as the amount of deposit, the density of the formed mat becomes low while the density of the central part is high and the density of both ends is low at the edge part (both sides) and the central part in the width direction. Was not uniform in the width direction.
Then, the formed mat is introduced into a hot press or the like and solidified into a fiber board. As described above, both ends of the board manufactured from the mat having a uniform thickness but not a uniform density in the width direction are 10 About -20% (each having a width of 1 m and 50 to 100 mm) was cut and discarded.
[0005]
[Patent Document 1]
Japanese Patent No. 3,247,583 (Claims, Claim 1, FIG. 1, 0012)
[0006]
[Problems to be solved by the invention]
The present invention provides a fiber mat forming apparatus in which the fiber board is made uniform by setting the relationship between the density and thickness of the formed mat.
[0007]
[Means for Solving the Problems]
In view of the problem that both ends of the manufactured board based on the above-described prior art are cut and discarded at low density, the present invention projects a blade that contacts the upper part of the deposit at a fixed interval above the downstream side of the conveyor. The sandwiching belt provided is supported by a rotatable roller, and the traveling direction of the sandwiching belt is made to scrape the upper part of the deposit that the blade contacts to the upstream side, and the blade tip height is applied to both ends. By forming it low, the thickness of both ends where the density of the deposit is low is set high, the mat is made with the amount of raw material in the deposit made uniform in the width direction, and the uniform board is manufactured by hot pressing etc. In this way, the above problem is solved.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the supply unit 2 of the fiber mixed raw material R is disposed on the upstream side of the forming device 1, and the press device (not shown) follows the metering device 3 on the downstream side of the forming device 1. Is arranged.
The supply state of the raw material R to the supply unit 2 may be a batch supply by manual operation or a continuous supply using machinery and equipment. A raw material in which fibers such as wood fiber, bamboo fiber, hemp fiber, and palm fiber are mixed with a binder. R is supplied to the forming apparatus 1. The supply unit 2 may be of any type as long as the fiber can be supplied without forming a large thread.
In addition to the above, the fibers may be waste paper pulverized products, scraps of felt and fiber knitted fabrics, synthetic fibers, etc., or fibers made of materials having specific functions may be used alone or in combination. As the binder, a binder resin such as an isocyanate resin, a phenol resin, a melamine resin, a urea resin, polyethylene, polypropylene, or an acrylic resin may be used, and the binder may be in a fibrous form or attached to the surface of the fiber. .
[0009]
As shown in FIGS. 1 to 3, in the supply unit 2 of the forming apparatus 1, a transfer conveyor 5 is horizontally arranged on a main frame 4, and a vibrating conveyor 6 corresponding to a raw material supply apparatus is provided on the upstream side of the transfer conveyor 5. A hopper 7 connected to is disposed.
The conveyor 5 is suspended by a plurality of rollers 8, 8 a... That are rotatably supported by the main frame 4, and the upper surface portion that is driven to circulate becomes a deposition surface of the raw material R containing fibers.
Further, a support bar 9 is erected on the main frame 4, and a sub frame 11 is suspended so as to be movable up and down via a slide bush 10 fitted to the support bar 9, and between the main frame 4 and the sub frame 11. Is provided with a height adjusting mechanism 14 including a motor 12 with brake, a feed screw rod 13 and the like, and the height of the subframe 11 is adjusted according to the measurement result of the mat M in the measuring device 3.
[0010]
The subframe 11 on the upper downstream side of the conveyor 5 is equipped with an upper surface forming device 15 that forms the upper surface of the deposit m into a predetermined shape and has a predetermined thickness, and the thickness adjustment of the deposit m is performed in the subframe. 11 by adjusting the height of 11 or by swinging the upper surface forming device 15.
As shown in FIG. 4, a clamping belt 16 is arranged in an opposed state above the downstream side of the conveyor 5, and a support plate 17 a is provided on the subframe 11 by a swing adjustment mechanism 17 so that the swing angle is freely adjustable. The sandwiching belt 16 is suspended by a plurality of rollers 18, 18 a... That are rotatably supported by the support plate 17 a, and the lower surface portion that is circulated is the operation side for the raw material R containing fibers.
The sandwiching belt 16 is provided with blades 19, 19 a... That regularly apply a pressure-recovering action to the upper part of the deposit m and project at regular intervals. A plurality of rollers that rotatably support the sandwich belt 16. 18, 18 a... Are arranged at the upper, middle and lower three positions from the upstream side to the downstream side, the position where the downstream roller 18 is the lowest and finally forms the upper surface of the deposit m, and the upstream intermediate roller 18 a. Is slightly higher than the roller 18 on the downstream side, and the roller 18b serving as the folded portion on the upstream side is disposed highest.
Accordingly, the sandwiching belt 16 facing the conveyor 5 is generally inclined with respect to the horizontal plane, and the inclination angle is inclined in two stages with the intermediate roller 18a as a boundary and the downstream side being a small angle and the upstream side being a large angle. .
The clamping belt 16 circulated and driven along these rollers 18, 18 a... Is circulated and driven from the downstream side to the upstream side in the direction opposite to the conveyor 5, that is, the lower surface forward side, and the motor 20 and the driving roller on the backward side. The sandwiching belt 16 is driven to circulate by being supported by the belt 21, and the blades 19, 19 a... Provided on the sandwiching belt 16 are accumulated at the portion supported by the downstream lower roller 18 and the two-step inclined portion. When it comes into contact with the upper part of the object m, the clamping belt 16 travels in the direction of scraping back to the upstream side.
[0011]
The sandwiching belt 16 has been described as being supported by the rollers 18, 18 a... At the upper, middle, and lower three height positions from the upstream side to the downstream side except for the driving roller 21 of the motor 20. The rollers 18a and 18b other than the roller 18 provided at the lower position of the are optional.
For example, the blades 19, 19 a... Contact with the upper part of the deposit m on the downstream side and scrape back to the upstream side so as to have a predetermined thickness. You may support. In that case, the driving roller 21 of the motor 20 may be disposed directly above the lower roller 18 on the downstream side, but preferably the motor 20 is disposed on the upper upstream side and the sandwiching belt 16 facing the conveyor 5 is inclined. It is preferable to arrange.
Further, although the sandwiching belt 16 facing the transport conveyor 5 is inclined in two steps, the intermediate roller 18a may be omitted and the portion where the sandwich belt 16 faces the transport conveyor 5 may be tilted. This corresponds to the motor 20 disposed above the upstream side of the roller 18 described above.
[0012]
As shown in FIG. 5, a pair of L-shaped mounting plates 22, 22a are vertically opposed to the clamping belt 16, and the mounting plates 22, 22a are attached to the clamping belt 16. The blades 19, 19a... Are inserted into the insertion gap 23 between them, and are detachably fixed with mounting tools 24 such as bolts and nuts.
As shown in FIG. 6, blades 19, 19 a... That are detachably attached to and fixed to the clamping belt 16 are selected from a plurality of blades and are detachably mounted. The basic pattern of the blades 19, 19 a. In the blades 19, 19 a... In the figure (a-1) in the figure which is the A pattern, the intermediate part 26 has the same height, and in the figure which is the B pattern in the figure (b-1). In the blades 19, 19 a..., Irregularities are provided in the intermediate portion 26.
In the case of the A pattern, the formed mat M is formed so that both end sides 25 and 25a are deposited high as shown in (a-2) in the figure, and hot press as shown in (a-3) in the figure. The upper and lower molds 27, 27a at the time have flat ends, 25a and the intermediate part 26, and the solidified board MM is plate-shaped.
It should be noted that the degree to which the height of the blades 19, 19 a... Is formed in a tapered shape over both end sides 25, 25 a is a large-angle tapered shape in order to clearly illustrate the feature in the illustrated case. The taper angle of the blades 19, 19 a... Is also reduced if the density drop on the both ends of the deposit m is small. .
[0013]
In the case of the B pattern, as shown in (b-2) in the figure, the formed mat M is high on both end sides corresponding to the shape of the blades 19, 19a... As shown in (b-3), the lower die 27 is flat, the upper die 27a has irregularities, and the solidified board MM has groove-like irregularities on the upper surface, and is used as a silencer or the like.
For example, if the groove part becomes a space and vibration waves do not easily propagate, and a high / medium density board is used as a flooring underlay, impact sound can be absorbed and silenced. Used as
In the method of the present invention, the board MM having a uniform density can be continuously mass-produced. However, in the conventional method, the cutting of the flat board or the extrusion molding with a composite material of plastic and wood powder, the equipment cost is high. Productivity was large and low.
[0014]
Next, the supply unit 2 provided on the upper upstream side of the conveyor 5 will be described.
As shown in FIGS. 1 to 3, the hopper 7 disposed on the upstream side is provided on the subframe 11 that can be adjusted in height, and the skirt portion 28 on the lower portion extends downward to near the upper portion of the conveyor 5. Above the hopper 7, a vibrating conveyor 6 having a screen 29 on the lower surface, which is a material R supply device, is arranged.
Specifically, the sliding surfaces 31, 31 a having unevenness are provided on the upper frame 30 of the main frame 4, and rotatable sliding rollers 32, 32 a provided on the vibrating conveyor 6 disposed to be opposed to the upper side of the supply port of the hopper 7. Are arranged on the sliding surfaces 31, 31 a, and the cam plate 34 is attached to the rotation shaft of the motor 33 provided on the upper frame 30, and the proximal end shaft support portion 36 of the connecting rod 35 is attached to the eccentric position of the cam plate 34. At the same time, the tip shaft support 36 a of the connecting rod 35 is attached to the rear end of the vibration conveyor 6.
With this configuration, the vibration conveyor 6 moves back and forth by the operation of the motor 33, and the vibration conveyor 6 moves up and down due to the unevenness of the sliding surfaces 31, 31a. .
In addition, although the vibration conveyor 6 was demonstrated as the supply part 2 to the upstream of the conveyance conveyor 5, it is good also as what makes it the gyro-type which carries out a circular motion on a horizontal surface, or winds the raw material R with air, batch type, continuous The configuration of the supply unit 2 including the formula is appropriately selected according to the raw material R.
[0015]
As shown in FIGS. 1 to 3, shielding guide plates 37, 37 a, etc. are appropriately erected so as to surround the forming portion that is above the transfer conveyor 5 and below the skirt portion 28 of the vibration conveyor 6.
In addition, the conveyor 5 is a breathable conveyor belt, and a suction duct 38 is connected to a suction hood disposed below the conveyor belt 5.
[0016]
As shown in FIGS. 1-3, the weighing | measuring apparatus 3 arrange | positioned in the downstream of the forming apparatus 1 has arrange | positioned the carrying-out conveyor 40 in the upper part of the carrying-out cart 39 so that circulation movement is possible by rollers 41, 41a.
Further, shielding guide plates 42 are erected on both sides of the carry-out conveyor 40, and a measuring instrument 43 is disposed below the carry-out conveyor 40. The height of the forming apparatus 1 is determined by a command from the control panel 44 according to the measurement result. The adjustment mechanism 14 is operated, the speed of the conveyor 5 is changed, and the supply state of the raw material R is changed.
A press device (not shown) for compressing or heating the formed mat M is provided downstream of the weighing device 3.
[0017]
Next, the operation of the fiber mat forming apparatus according to the present invention will be described.
The raw material R, which is a mixture of fiber and binder, is charged into the vibrating conveyor 6 in a batch or continuous feed manner, and when the motor 33 is driven, the vibrating conveyor 6 vibrates and the raw material R falls from the screen 29. And deposited on the conveyor 5.
The upper part of the deposit m conveyed to the upper surface forming device 15 side by the conveyor 5 that is driven to circulate is in contact with the blades 19, 19a of the clamping belt 16 that is circulated and the deposit m is formed in a predetermined thickness and shape. The
The clamping belt 16 that is circulated and driven in a state where the downstream side is low is supported by rollers 18, 18 a... That are spaced apart from each other, and the blades 19, 19 a. By vibrating, the deposit m is filled, the adhesion of the raw material R to the blades 19, 19 a... Is prevented, and the blades 19, 19 a are moved by moving both ends slightly downward. The raw material R separated from ... is prevented from scattering to the outside.
[0018]
As shown in FIG. 4, the contact state between the deposit m and the blades 19, 19 a of the clamping belt 16 is such that the blades 19, 19 a. The deposit m is slightly squeezed, and the upstream side thereof is in contact with the sandwich belt 16 having a low inclination, so that this portion has a squeezing action and the tips (lower ends) of the blades 19, 19 a. The upper part of the deposit m is picked up so as to be caught on the upper part of the deposit m, and the upper part of the deposit m is returned to the upstream side. .
The raw material R scraped up by the blades 19, 19 a... Accumulates in a mountain shape on the upper part of the deposit m on the upstream side, and this action is sequentially repeated until a predetermined thickness is reached at the position of the lowermost roller 18 on the downstream side. The deposit m filled in the shape becomes the mat M.
[0019]
The shape of the blades 19, 19 a... Is low in both end sides 25, 25 a, that is, a state in which the distance from the surface of the conveyor 5 is large. The mat M is thick.
[0020]
Even if the raw material R supplied from the hopper 7 side is high in the center and low in both ends due to the scraping action by the blades 19, 19 a, the blades 19, 19 a. The raw material R scraped up in the shape of a mountain is laid down to the upstream side so that it rolls and falls into a state of falling, and a part of the raw material in the central part that is scraped in a large amount moves to both ends where the deposition amount is relatively small. As a whole, the deposition amount of the raw material R is equalized as it approaches the upper surface forming device 15.
Further, during the deposition on the conveyor 5, the air is sucked below the conveyor 5 by the suction action of the suction duct 38 below the conveyor 5, and the fiber accumulation state is promoted.
[0021]
The weighing device 3 measures the weight of the accumulated mat M, determines whether or not the load amount is a predetermined amount by the control panel 44, instructs the height adjusting mechanism 14 of the forming device 1, and sets the vibration conveyor 6. The height position is adjusted and the speed of the conveyor 5 is adjusted, and control is performed so that a desired load amount is obtained.
The mat M weighed by the weighing device 3 is transferred to a press device and is compression-heated and formed on the fiber board MM.
[0022]
Next, a case where the deposition amount is divided into a plurality of stages according to the composition of the raw material R will be described.
As shown in FIG. 7, a plurality of forming devices 1 provided with the supply unit 2 and the upper surface forming device 15 on the upstream side and the downstream side of the conveyor 5 may be directly connected and sequentially deposited in a plurality of stages. Then, the upper surface forming device 15 of the next stage is set to the upper position in accordance with the deposition amount of the previous stage.
When the plurality of forming devices 1 are directly connected, the supply unit 2 and the upper surface forming device 15 are sequentially arranged as a set on one transport conveyor 5, but a plurality of the forming devices 1 shown in FIGS. Also good.
With such a configuration, for example, the lower 1/3 is deposited in the first stage, the middle 1/3 is deposited in the second stage, and the upper 1/3 is deposited in the third stage, so that the mat has a desired thickness Form M.
In addition, the raw materials R supplied in a plurality of stages may be of the same type, or may be made of different materials in consideration of strength, aesthetics, texture, etc. In addition, the upper and lower layers may be made of a material having an excellent appearance, or a material having a specific function may be formed in a laminated state.
[0023]
【The invention's effect】
In short, the present invention supports the sandwiching belt 16 in which the blades 19, 19 a, which are in contact with the upper part of the deposit m, are projected at regular intervals above the transport conveyor 5 by the rotatable rollers 18, 18 a. The deposit m can be formed into a mat M having a predetermined thickness, and the traveling direction of the sandwich belt 16 is set to be the direction in which the upper portion of the deposit m with which the blades 19, 19a. As a result, the upper part of the deposit m of a predetermined thickness or more is returned to the upstream side, and the unbalanced deposition state on the upstream side can be leveled with rolling movement to a small amount of the deposit. 19, 19 a... Are formed low at both end sides 25, 25 a, so that even if the deposition density at both ends is low, the height is increased, resulting in an equivalent amount at the center and both ends. Obtaining sediment m Is possible, it is possible to form a uniform board MM after the press.
[0024]
Since the holding belt 16 facing the conveyor 5 is supported in an inclined state by the lower roller 18 on the downstream side and the upper roller 18b on the upstream side, the pressure is filled on the downstream side, and the scraping action is increased on the upstream side. Can be performed efficiently.
[0025]
The inclination angle of the clamping belt 16 with respect to the horizontal plane is supported by an intermediate roller 18a to form two stages, the downstream side being a small angle and the upstream side being a large angle, so that both the filling and scraping actions are parallel. In addition, the separation can efficiently level out the unbalanced input amount, and the support of the rollers 18, 18 a.
[0026]
The blades 19, 19 a... Are provided on the holding belt 16 so as to be replaceable, and are formed low at both end sides 25, 25 a. The blades 19, 19 a. ... and one of the selected blades 19, 19 a... Is attached to the clamping belt 16, so that a mat M having a shape suitable for various applications can be easily performed by simply replacing the blades 19, 19 a. I can do it.
[0027]
A plurality of forming devices 1 each provided with the supply unit 2 and the upper surface forming device 15 are directly connected, and the downstream upper surface forming device 15 is set at a position higher than the upstream upper surface forming device 15 by the deposition amount of the deposit m. The thick mat M can be manufactured, and even if the raw material R is prone to form a thread-like shape, the scraped raw material R has an action of separating when it falls and rolls upstream. The production of a multi-layered mat M while suppressing the formation of thread-strings, or the production of a board MM with excellent function, aesthetics, etc. by forming the raw material R supplied in multiple stages from different materials The practical effect is great.
[Brief description of the drawings]
FIG. 1 is a front view of a forming apparatus according to the present invention.
FIG. 2 is a plan view of the forming apparatus.
FIG. 3 is a cross-sectional view of the forming apparatus.
FIG. 4 is an enlarged view showing a deposition state by the upper surface forming apparatus.
FIG. 5 is an enlarged view showing a state in which the blade is attached to the clamping belt.
FIG. 6 is a diagram showing a formation state of two patterns of blades, mats, and boards.
FIG. 7 is a schematic diagram showing an example in which a plurality of forming devices are directly connected.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Forming apparatus 2 Supply part 5 Conveyor 15 Upper surface forming apparatus 16 Nipping belt 18, 18a ... Roller 19, 19a ... Blade 25, 25a Both end side 26 Intermediate part R Raw material m Deposit M Matte

Claims (5)

A fiber mat forming device provided with a supply unit for supplying the fiber mixed raw material to the upstream side and the downstream side of the conveyor and an upper surface forming device for the deposit, respectively.
A sandwich belt with blades abutting on the upper part of the deposit projecting at a fixed interval is supported by a rotatable roller on the upper downstream side of the conveyor, and the traveling direction of the sandwich belt is determined by the direction of the deposit with which the blade abuts. An apparatus for forming a fiber mat, characterized in that the upper portion is formed in a direction to scrape back to the upstream side, and the tip height of the blade is lowered toward both ends. 2. The fiber mat forming apparatus according to claim 1, wherein the holding belt facing the conveyor is supported in an inclined state by a roller on the downstream side and a roller on the upstream side. 3. A fiber mat forming apparatus according to claim 2, wherein the inclination angle of the sandwich belt with respect to the horizontal plane is supported by an intermediate roller to form two stages, the downstream side being a small angle and the upstream side being a large angle. . The blade is replaceably provided on the clamping belt, and the blade formed low on both ends is equipped with an intermediate part with the same height and an uneven tip at the intermediate part, and clamps one of the selected blades. 4. A fiber mat forming apparatus according to claim 1, wherein the fiber mat forming apparatus is attached to a belt. 5. A plurality of fiber mat forming apparatuses according to claim 1, wherein a plurality of fiber mat forming apparatuses are provided, respectively, and a downstream upper surface forming apparatus is deposited from an upstream upper surface forming apparatus. A fiber mat forming device characterized by being set at a position higher by the amount.

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