JP2022156153A - Fiber structure manufacturing device and fiber structure manufacturing method - Google Patents

Abstract

To provide a fiber structure manufacturing device and a fiber structure manufacturing method which can prevent or suppress damage to an accumulation due to condensation.SOLUTION: A fiber structure manufacturing device comprises: an accumulation portion that has a discharge portion to discharge material containing fibers and a conveyance portion to accumulate and convey the material discharged from the discharge portion and generates an accumulation formed of accumulated material; and a control portion that has a reception portion to receive an actuation instruction to actuate the accumulation portion or a stop instruction to stop the actuation of the accumulation portion and controls the actuation of the accumulation portion based on the instruction received by the reception portion. The control portion can implement a first mode to control the actuation of the accumulation portion so as to generate a first accumulation having a first strength when the reception portion receives the actuation instruction and a second mode to control the actuation of the accumulation portion so as to stop the actuation of the accumulation portion after generating a second accumulation having a second strength higher than the first strength.SELECTED DRAWING: Figure 3

Description

TECHNICAL FIELD The present invention relates to a fiber structure manufacturing apparatus and a fiber structure manufacturing method.

In recent years, a dry-type fiber structure manufacturing apparatus that uses water as little as possible has been proposed. As shown in Patent Document 1, this fiber structure manufacturing apparatus includes: a coarse crushing section for coarsely crushing a material containing fibers; and a molding unit for shaping the deposit deposited by the deposition unit.

In such a fiber structure manufacturing apparatus, when the apparatus is stopped, deposits are left in the apparatus so that the sheet can be quickly manufactured next time. In addition, in the fiber structure manufacturing apparatus described in Patent Document 1, in order to suppress the deflection of the deposits remaining in the apparatus due to its own weight, the thickness of the deposits remaining in the apparatus when stopped is Control the actuation of the deposit so that the thickness becomes thinner.

WO2017/094514

However, if dew condensation occurs in the conveying portion of the deposit due to the temperature gradient in the apparatus, the deposit may stick to the dew condensation occurrence site. There is a risk that the sediment will tear and damage starting from the part where it is stuck.

The fiber structure manufacturing apparatus of the present invention has a discharging section that discharges a material containing fibers, and a conveying section that conveys the material discharged from the discharging section while depositing the material. a deposition unit that produces deposits;
A control unit that has a reception unit that receives an operation instruction to operate the deposition unit or a stop instruction to stop operation of the deposition unit, and that controls the operation of the deposition unit based on the instruction received by the reception unit. and
The control unit controls the operation of the deposition unit to generate a first deposit having a first intensity when the reception unit receives the operation instruction; Controlling the operation of the deposition unit so as to stop the operation of the deposition unit after generating a second deposit having a second strength higher than the first strength when a stop instruction is received. and a second mode for performing

The fiber structure manufacturing method of the present invention has a discharging section that discharges a material containing fibers, and a conveying section that conveys the material discharged from the discharging section while depositing the material. a deposition unit that generates deposits; and a reception unit that receives an operation instruction to operate the deposition unit or a stop instruction to stop operation of the deposition unit; A fiber structure manufacturing method for manufacturing a sheet using a fiber structure manufacturing apparatus comprising a control unit that controls the operation of the deposition unit,
The control unit controls the operation of the deposition unit to generate a first deposit having a first intensity when the reception unit receives the operation instruction; Controlling the operation of the deposition unit so as to stop the operation of the deposition unit after generating a second deposit having a second strength higher than the first strength when a stop instruction is received. and a second mode for performing

FIG. 1 is a schematic side view showing a fiber structure manufacturing apparatus according to an embodiment. 2 is a block diagram of the fiber structure manufacturing apparatus shown in FIG. 1. FIG. FIG. 3 is an enlarged view of the deposited portion and its surroundings shown in FIG. FIG. 4 is a flowchart for explaining a control operation executed by a control unit shown in FIG. 1;

BEST MODE FOR CARRYING OUT THE INVENTION A fiber structure manufacturing apparatus and a fiber structure manufacturing method according to the present invention will be described in detail below based on preferred embodiments shown in the accompanying drawings.

<First embodiment>
FIG. 1 is a schematic side view showing a fiber structure manufacturing apparatus according to an embodiment. 2 is a block diagram of the fiber structure manufacturing apparatus shown in FIG. 1. FIG. FIG. 3 is an enlarged view of the deposited portion and its surroundings shown in FIG. FIG. 4 is a flowchart for explaining a control operation executed by a control unit shown in FIG. 1;

Note that FIG. 1 is a schematic configuration diagram, and the positional relationship of each part of the fiber structure manufacturing apparatus 100 is greatly different from the illustrated positional relationship. 1 and 3, the raw material M1, the coarse fragment M2, the fibrillated material M3, the first screened material M4-1, the second screened material M4-2, the first web M5, the subdivided material M6, the mixture M7, the The direction in which the 2-web M8 and the sheet S are conveyed, that is, the direction indicated by the arrow is also referred to as the conveying direction. Further, the tip side of the arrow is also referred to as the upstream side in the conveying direction, and the base end side of the arrow is also referred to as the downstream side in the conveying direction.

As shown in FIG. 1, the fiber structure manufacturing apparatus 100 of the present invention coarsely crushes and defibrates a raw material M1, mixes and deposits a binding material, and shapes the deposited material by a molding unit 20 to form the material. It is a device that obtains the body.

Also, the molded body manufactured by the fiber structure manufacturing apparatus 100 may be in the form of a sheet such as recycled paper, or may be in the form of a block. In addition, the density of the molded body is not particularly limited, and it may be a molded body having a relatively high fiber density such as a sheet, or a molded body having a relatively low fiber density such as a sponge body. , a molded body having a mixture of these characteristics.

In the following description, it is assumed that the raw material M1 is used or unnecessary used paper, and the molded article to be manufactured is the sheet S that is recycled paper.

As shown in FIG. 1, a fiber structure manufacturing apparatus 100 of the present invention includes a raw material supply section 11, a crushing section 12, a defibrating section 13, a screening section 14, a first web forming section 15, and a subdivision section. A section 16, a mixing section 17, a discharging section 18, a second web forming section 19, a forming section 20, a cutting section 21, a stock section 22, a recovery section 27, and a control section for controlling these operations. 28 and.

The fiber structure manufacturing apparatus 100 also includes a humidifying section 231 , a humidifying section 232 , a humidifying section 233 , a humidifying section 234 , a humidifying section 235 , and a humidifying section 236 . In addition, the fiber structure manufacturing apparatus 100 includes a blower 261 , a blower 262 and a blower 263 .

In addition, in the fiber structure manufacturing apparatus 100, a raw material supply process, a crushing process, a fibrillating process, a sorting process, a first web forming process, a dividing process, a mixing process, and a second web forming process. , a sheet forming process, and a cutting process are executed in this order.

The configuration of each part will be described below.
The raw material supply unit 11 is a portion that performs a raw material supply step of supplying the raw material M1 to the coarse crushing unit 12 . This raw material M1 is a sheet-like material made of a fiber-containing substance containing cellulose fibers. In addition, the cellulose fiber may be a fibrous fiber having cellulose as a main component as a compound, and may contain hemicellulose and lignin in addition to cellulose. Moreover, the raw material M1 may be of any form, such as a woven fabric or a non-woven fabric. Further, the raw material M1 may be, for example, recycled paper manufactured by defibrating waste paper, Yupo paper (registered trademark) of synthetic paper, or may not be recycled paper. Further, in the present embodiment, the raw material M1 is used or unnecessary used paper.

The coarse crushing unit 12 is a portion that performs a coarse crushing step of coarsely crushing the raw material M1 supplied from the raw material supply unit 11 in air such as the air to generate coarsely crushed pieces M2. The coarsely crushing unit 12 has a pair of coarsely crushing blades 121, and the raw material M1 passes between the rotating coarsely crushing blades 121 to be coarsely crushed to obtain coarsely crushed pieces M2. The coarsely crushed pieces M2 produced by the coarsely crushing section 12 pass through the pipe 241 and are transported to the defibrating section 13 .

The defibrating unit 13 is a part that performs a fibrillating step of fibrillating the coarsely crushed pieces M2 in the air, that is, in a dry manner. Through the defibration process in the fibrillation section 13, the fibrillated material M3 can be produced from the coarse fragments M2. Here, "disentangle" refers to disentangling the coarse fragments M2 formed by binding a plurality of fibers into individual fibers. Then, this unraveled material becomes the defibrated material M3. The shape of the defibrated material M3 is linear or belt-like. In addition, the defibrated material M3 may exist in a state of being entangled to form a lump, that is, in a state of forming a so-called "lump".

For example, in the present embodiment, the defibrating unit 13 is configured by an impeller mill having rotary blades that rotate at high speed and a liner positioned on the outer periphery of the rotary blades. The coarsely crushed pieces M2 that have flowed into the defibrating section 13 are sandwiched between the rotary blade and the liner and defibrated.

Further, the disentanglement section 13 can generate an air flow from the crushing section 12 to the sorting section 14, that is, an air flow, by rotating the rotary blade. Thereby, the coarse fragments M2 can be sucked from the tube 241 to the disentanglement section 13 . Further, after the defibration process, the defibrated material M3 can be delivered to the sorting section 14 via the pipe 242 .

A blower 261 is installed in the middle of the pipe 242 . The blower 261 is an airflow generating device that generates an airflow toward the sorting section 14 . This promotes sending out the defibrated material M3 to the sorting section 14 .

The sorting unit 14 is a part that performs a sorting step of sorting the defibrated material M3 according to the size of the fiber length. In the sorting section 14, the defibrated material M3 is sorted into a first sorted material M4-1 and a second sorted material M4-2 larger than the first sorted material M4-1. The first sorted material M4-1 has a size suitable for manufacturing the sheets S later. The average length is preferably 1 μm or more and 30 μm or less. On the other hand, the second sorted material M4-2 includes, for example, insufficiently defibrated material, excessive aggregates of defibrated fibers, and the like.

The sorting section 14 has a drum section 141 and a housing section 142 that houses the drum section 141 .

The drum portion 141 is a sieve which is composed of a cylindrical mesh body and rotates around its central axis. The defibrated material M3 flows into the drum portion 141 . Then, by rotating the drum part 141, the defibrated material M3 smaller than the mesh opening is sorted as the first sorted material M4-1, and the defibrated material M3 larger than the mesh opening is selected. It is sorted as the second sorted product M4-2.
The first sorted material M4-1 falls from the drum section 141. As shown in FIG.

On the other hand, the second sorted material M4-2 is delivered to the pipe 243 connected to the drum section 141. As shown in FIG. The pipe 243 is connected to the pipe 241 on the side opposite to the drum portion 141 , that is, on the upstream side. The second sorted material M4-2 that has passed through the pipe 243 joins the coarsely crushed pieces M2 in the pipe 241 and flows into the disentanglement section 13 together with the coarsely crushed pieces M2. As a result, the second sorted material M4-2 is returned to the defibrating unit 13 and defibrated together with the coarse fragments M2.

Further, the first sorted material M4-1 dropped from the drum section 141 drops while being dispersed in the air, and heads toward the first web forming section 15 positioned below the drum section 141. As shown in FIG. The first web forming section 15 is a section that performs a first web forming step of forming the first web M5 from the first sorted material M4-1. The first web forming section 15 has a mesh belt 151 , three tension rollers 152 and a suction section 153 .

The mesh belt 151 is an endless belt on which the first sorted material M4-1 is deposited. This mesh belt 151 is wound around three tension rollers 152 . Then, the rotation of the tension roller 152 causes the first sorted material M4-1 on the mesh belt 151 to be conveyed downstream.

The first sorted object M4-1 is larger than the opening of the mesh belt 151. As shown in FIG. As a result, passage of the first sorted material M4-1 through the mesh belt 151 is restricted, so that the first sorted material M4-1 can be deposited on the mesh belt 151. FIG. Further, the first sorted material M4-1 is accumulated on the mesh belt 151 and conveyed downstream together with the mesh belt 151, so that the first sorted material M4-1 is formed as a layered first web M5.

In addition, there is a possibility that, for example, dust and dirt are mixed in the first sorted material M4-1. Dust and dirt can be generated, for example, by crushing and defibration. Such dust and dirt are collected by the collecting unit 27, which will be described later.

The suction part 153 is a suction mechanism that sucks air from below the mesh belt 151 . As a result, the dust that has passed through the mesh belt 151 can be sucked together with the air.

Also, the suction unit 153 is connected to the recovery unit 27 via a tube 244 . Dust sucked by the suction unit 153 is collected by the collection unit 27 .

A pipe 245 is further connected to the recovery section 27 . A blower 262 is installed in the middle of the pipe 245 . By operating the blower 262 , a suction force can be generated in the suction portion 153 . Thereby, formation of the first web M5 on the mesh belt 151 is promoted. This first web M5 is one from which dust, dirt, and the like have been removed. Also, dust and dirt pass through the pipe 244 and reach the collection unit 27 by the operation of the blower 262 .

The housing portion 142 is connected to the humidifying portion 232 . The humidifying section 232 is composed of an evaporative humidifier. As a result, humidified air is supplied into the housing portion 142 . This humidified air can humidify the first sorted items M4-1, and thus can prevent the first sorted items M4-1 from adhering to the inner wall of the housing portion 142 due to electrostatic force.

A humidifying section 235 is arranged on the downstream side of the sorting section 14 . The humidifying section 235 is composed of an ultrasonic humidifier that sprays water. As a result, moisture can be supplied to the first web M5, thereby adjusting the moisture content of the first web M5. This adjustment can suppress the adsorption of the first web M5 to the mesh belt 151 due to electrostatic force. Thereby, the first web M5 is easily separated from the mesh belt 151 at the position where the mesh belt 151 is folded back by the tension roller 152 .

A subdivision 16 is arranged downstream of the humidification section 235 . The subdivided portion 16 is a portion where a dividing step is performed to divide the first web M5 separated from the mesh belt 151 . The subsection 16 has a rotatably supported propeller 161 and a housing section 162 that houses the propeller 161 . Then, the rotating propeller 161 can split the first web M5. The first web M5 that has been split becomes the subdivisions M6. Also, the sub-piece M6 descends inside the housing portion 162 .

The housing portion 162 is connected to the humidifying portion 233 . The humidifying section 233 is composed of, for example, an evaporative humidifier. As a result, humidified air is supplied into the housing portion 162 . This humidified air can also prevent the subdivisions M6 from adhering to the inner walls of the propeller 161 and the housing portion 162 due to electrostatic force.

A mixing section 17 is arranged downstream of the subdivision section 16 . The mixing section 17 is a section that performs a mixing step of mixing the finely divided bodies M6 and the binder P1. The mixing section 17 has a binder supply section 171 , a pipe 172 and a blower 173 .

A tube 172 connects the housing part 162 of the fraction 16 and the housing part 182 of the discharge part 18 and is the flow path through which the mixture M7 of fractions M6 and binder P1 passes.

A binder supply part 171 is connected to the middle of the pipe 172 . The binder supply section 171 has a screw feeder 174 . By rotating the screw feeder 174, the binder P1 can be supplied to the tube 172 as powder or particles. Binder P1 supplied to tube 172 is mixed with fractions M6 to form mixture M7.

The binder P1 is used to bind fibers together in a later step, and includes, for example, thermoplastic resins, curable resins, starch, dextrin, glycogen, amylose, hyaluronic acid, arrowroot, konjac, potato starch, and etherification. Starch, esterified starch, natural gum glue (etherified tamarind gum, etherified locust bean gum, etherified guar gum, acacia arabic gum), fiber-derived glue (etherified carboxymethylcellulose, hydroxyethylcellulose), seaweeds (sodium alginate, agar), animal proteins (collagen, gelatin, hydrolyzed collagen, sericin), etc., but thermoplastic resins are preferably used. Examples of thermoplastic resins include AS resins, ABS resins, polyethylene, polypropylene, polyolefins such as ethylene-vinyl acetate copolymer (EVA), modified polyolefins, acrylic resins such as polymethyl methacrylate, polyvinyl chloride, polystyrene, and polyethylene. Polyester such as terephthalate and polybutylene terephthalate, polyamide (nylon) such as nylon 6, nylon 46, nylon 66, nylon 610, nylon 612, nylon 11, nylon 12, nylon 6-12, nylon 6-66, polyphenylene ether, polyacetal , polyether, polyphenylene oxide, polyether ether ketone, polycarbonate, polyphenylene sulfide, thermoplastic polyimide, polyether imide, liquid crystal polymer such as aromatic polyester, styrene, polyolefin, polyvinyl chloride, polyurethane, polyester, Various thermoplastic elastomers such as polyamide-based, polybutadiene-based, trans-polyisoprene-based, fluororubber-based, and chlorinated polyethylene-based elastomers can be used, and one or more selected from these can be used in combination. Preferably, as the thermoplastic resin, a polyester or a material containing this is used.

In addition to the binder P1, the materials supplied from the binder supply unit 171 include, for example, a coloring agent for coloring the fibers, an aggregation inhibitor for suppressing aggregation of the fibers and the aggregation of the binder P1. , a flame retardant for making the fibers difficult to burn, a paper strength agent for increasing the paper strength of the sheet S, and the like. Alternatively, the binding agent P1 may contain them in advance to form a composite, which may be supplied from the binding agent supply unit 171 .

A blower 173 is installed in the middle of the pipe 172 downstream of the binder supply section 171 . By the action of rotating parts such as blades of the blower 173, the finely divided bodies M6 and the binder P1 are mixed. Also, the blower 173 can generate an airflow toward the discharge section 18 . This airflow can agitate the subdivided bodies M6 and the binder P1 within the tube 172 . Thereby, the mixture M7 can flow into the discharge section 18 in a state in which the finely divided bodies M6 and the binder P1 are uniformly dispersed. Further, the finely divided bodies M6 in the mixture M7 are loosened in the process of passing through the tube 172 and become finer fibers.

The release part 18 is a part of the mixture M7 that loosens and releases the entangled fibers. The discharge section 18 has a drum section 181 and a housing section 182 that accommodates the drum section 181 .

The drum portion 181 is a sieve which is composed of a cylindrical mesh body and rotates around its central axis. A mixture M7 flows into this drum portion 181 . As the drum portion 181 rotates, fibers and the like in the mixture M7 that are smaller than the opening of the mesh can pass through the drum portion 181 . At that time, the mixture M7 is loosened and released into the air.

The housing portion 182 is connected to the humidifying portion 234 . The humidifying section 234 is composed of, for example, an evaporative humidifier. As a result, humidified air is supplied into the housing portion 182 . This humidified air can humidify the inside of the housing portion 182, and thus can suppress the mixture M7 from adhering to the inner wall of the housing portion 182 due to electrostatic force.

Moreover, the mixture M7 loosened by the drum section 181 falls while being dispersed in the air, and heads toward the second web forming section 19 positioned below the drum section 181 . The second web forming section 19 is a section that performs a second web forming step of forming a second web M8 from the mixture M7. The second web forming section 19 has a mesh belt 191 , a tension roller 192 and a suction section 193 .

The mesh belt 191 is an endless belt on which the mixture M7 is deposited. This mesh belt 191 is wound around four tension rollers 192 . The mixture M7 on the mesh belt 191 is conveyed downstream by the rotational drive of the tension roller 192 . Such a mesh belt 191 constitutes part of the conveying section 40 that conveys the second web M8 downstream.

Moreover, most of the mixture M7 on the mesh belt 191 is larger than the opening of the mesh belt 191 . This restricts the mixture M7 from passing through the mesh belt 191 and allows it to accumulate on the mesh belt 191 . Further, the mixture M7 is deposited on the mesh belt 191 and conveyed downstream together with the mesh belt 191, so that it is formed as a layered second web M8.

The suction part 193 is a suction mechanism that sucks air from below the mesh belt 191 . This allows the mixture M7 to be sucked onto the mesh belt 191, thereby facilitating deposition of the mixture M7 onto the mesh belt 191. FIG.

A pipe 246 is connected to the suction portion 193 . A blower 263 is installed in the middle of the pipe 246 . By operating the blower 263 , the suction portion 193 can generate a suction force.

A humidifying section 236 is arranged on the downstream side of the discharging section 18 . The humidifying section 236 is composed of an ultrasonic humidifier similar to the humidifying section 235 . Thereby, moisture can be supplied to the second web M8, and thus the moisture content of the second web M8 is adjusted. This adjustment can suppress the adsorption of the second web M8 to the mesh belt 191 due to electrostatic force. Thereby, the second web M8 is easily separated from the mesh belt 191 at the position where the mesh belt 191 is folded back by the tension roller 192 .
The discharging section 18 and the second web forming section 19 as described above constitute a depositing section.

The total amount of water added to the humidifiers 231 to 236 is preferably, for example, 0.5 parts by mass or more and 20 parts by mass or less with respect to 100 parts by mass of the material before humidification.

A shaping section 20 is arranged downstream of the second web forming section 19 . The forming section 20 is a section that performs a sheet forming step of forming the sheet S from the second web M8. The molding section 20 has a pressure section 201 and a heating section 202 .

The pressing unit 201 has a pair of calender rollers 203 and can press the second web M8 between the calender rollers 203 without heating. This increases the density of the second web M8. The calender roller 203 also functions as a transport section 40 that transports the second web M8 downstream. Then, this second web M8 is conveyed toward the heating section 202 . One of the pair of calender rollers 203 is a driving roller driven by operation of a motor (not shown), and the other is a driven roller.

The heating unit 202 has a pair of heating rollers 204 and can heat and press the second web M8 between the heating rollers 204 . The heating roller 204 also functions as a transport section 40 that transports the second web M8 downstream. Due to this heating and pressurization, the binder P1 is melted in the second web M8, and the fibers are bound to each other via the melted binder P1. Thereby, the sheet S is formed. Then, this sheet S is conveyed toward the cutting section 21 . One of the pair of heating rollers 204 is a driving roller driven by operation of a motor (not shown), and the other is a driven roller.

A cutting section 21 is arranged downstream of the forming section 20 . The cutting part 21 is a part for performing a cutting step of cutting the sheet S. As shown in FIG. The cutting portion 21 has a first cutting portion 211 and a second cutting portion 212 .

The first cutting unit 211 cuts the sheet S in a direction that intersects the conveying direction of the sheet S, particularly in a direction orthogonal thereto.

The second cutting section 212 has a rotary blade that rotates, and cuts the sheet S in a direction parallel to the conveying direction of the sheet S on the downstream side of the first cutting section 211 . This cutting removes unnecessary portions on both side edges of the sheet S to adjust the width of the sheet S, and the removed portions are called "ears". In this manner, the sheet S having the desired shape and size is further conveyed downstream and accumulated in the stock section 22 .

Each unit included in the fiber structure manufacturing apparatus 100 described above is electrically connected to the control unit 28 . The operation of each of these units is controlled by the control unit 28 .

As shown in FIG. 2 , the control unit 28 has a CPU (Central Processing Unit) 281 , a storage unit 282 and a reception unit 283 . The CPU 281 can, for example, make various judgments and various instructions.

The storage unit 282 stores various programs such as a program for manufacturing the sheet S, for example. Specifically, storage unit 282 stores programs for executing a first mode, a second mode, a third mode, and the like, which will be described later.

Further, the controller 28 may be built in the fiber structure manufacturing apparatus 100, or may be provided in an external device such as an external computer. Further, when the control unit 28 is provided in an external device, the control unit 28 and the fiber structure manufacturing apparatus 100 may be connected wirelessly or by wire.

Further, the CPU 281 and the storage unit 282 may, for example, be integrated and configured as one unit, or the CPU 281 may be incorporated in the fiber structure manufacturing apparatus 100, and the storage unit 282 may be an external computer or the like. Alternatively, the storage unit 282 may be built in the fiber structure manufacturing apparatus 100 and the CPU 281 may be provided in an external device such as an external computer.

The reception unit 283 is configured by an input port provided in the control unit 28, for example. An input signal is input from the input device 29 or the like, which will be described later, via the reception unit 283 .

The input device 29 is configured by, for example, a touch panel installed on the outer surface of the housing of the fiber structure manufacturing apparatus 100 . By operating the input device 29, the operator can input various instructions and settings such as an operation instruction to operate the apparatus and a stop instruction to stop the operation of the fiber structure manufacturing apparatus 100. FIG. The input information is received by the receiving unit 283, and control as described later is performed.

Now, when a stop instruction is input from the input device 29 while the fiber structure manufacturing apparatus 100 is operating, the control unit 28 stops each part of the fiber structure manufacturing apparatus 100 to stop sheet manufacturing. . At this time, as shown in FIG. 1, the fiber structure manufacturing apparatus 100 is stopped while the second web M8 remains in the fiber structure manufacturing apparatus 100. FIG. As a result, the next time the sheet production is resumed, the sheet production can be started quickly. However, depending on the environment of the fiber structure manufacturing apparatus 100, for example, the humidity and temperature inside the fiber structure manufacturing apparatus 100, condensation may occur inside the fiber structure manufacturing apparatus 100 while the sheet manufacturing is stopped. . When dew condensation occurs, the second web M8 sticks to various parts of the conveying unit 40, and when the conveying is restarted next time, there is a possibility that peeling or tearing will occur, resulting in deterioration of the sheet quality. In particular, since the forming part 20 is generally heated and tends to have a higher temperature than other parts, dew condensation is likely to occur. For example, if dew condensation occurs on the heating roller 204 of the heating unit 202, the second web M8 may stick to the heating roller 204 and peel or tear when the next transport is resumed. Therefore, in the present invention, the above problem can be solved by allowing the control section 28 to execute the first mode, the second mode, and the third mode. The first to third modes will be described below.

In the first mode, when the receiving unit 283 receives an operation instruction, the second web M8 (hereinafter referred to as the "second web M8A") is the normal mode for controlling the operation of the second web former 19 to produce In this embodiment, the magnitude of the strength is reproduced by the magnitude of the thickness. That is, the strength of the second web M8 increases as the thickness of the second web M8 increases, and the strength of the second web M8 decreases as the thickness of the second web M8 decreases.

The first thickness T1 is a value set by the operator. In such a first mode, the second web M8 having the strength set by the operator, that is, having the set thickness can be generated, and the sheet S having the set strength can be manufactured.

In the second mode, when the reception unit 283 receives a stop instruction, the second intensity is the second intensity higher than the first intensity, that is, the second deposit having the second thickness T2. In this mode, the operation of the second web forming section 19 is controlled so that the operation of the second web forming section 19 is stopped after the web M8 (hereinafter also referred to as "second web M8B") is generated. That is, instead of stopping the operation of the second web forming section 19 immediately after receiving the stop instruction, the operation of the second web forming section 19 is stopped after the high-strength second web M8B is generated. Therefore, after the stopped state, the second web M8B is in contact with the mesh belt 191, the calender roller 203, the heating roller 204, and the like. In addition, T1 and T2 preferably have a difference of, for example, 10% or more.

By executing such a second mode, dew condensation occurs in the fiber structure manufacturing apparatus 100 when it is in a stopped state. Even if these parts are operated while the second web M8B is stuck to the surface, etc., the second web M8B has a sufficient strength, so it is possible to prevent or suppress the second web M8B from being torn or damaged. can.

When the fiber structure manufacturing apparatus 100 is stopped after executing the second mode, the sheet S obtained by molding the second web M8B is discarded when the fiber structure manufacturing apparatus 100 is driven next time. Alternatively, it may be configured to be stocked in another stock unit (not shown).

Thus, in the second mode, the control unit 28 generates the second web M8B, which is the second deposit, which is thicker than the second web M8A, which is the first deposit. Control the operation of the discharge section 18 and the second web forming section 19 to stop the operation of the section 18 and the second web forming section 19 . As a result, the fiber structure manufacturing apparatus 100 can be stopped after the second web M8B having a high strength is generated by a simple method.

In addition, in the second mode, the control unit 28 controls the mesh belt 191, which is the transport unit, and the calender so that the transport speed of the second web M8, which is the deposit, is lower than the transport speed of the second web M8 in the first mode. It controls the operation of roller 203 and heated roller 204 . Thus, by a simple method of adjusting the conveying speeds of the mesh belt 191, calendar roller 203, and heating roller 204, it is possible to stop the fiber structure manufacturing apparatus 100 after generating a high-strength web. can.

The conveying speed of the second web M8 can be adjusted, for example, by changing the energization conditions of drive motors (not shown) of the mesh belt 191, calendar roller 203, and heating roller 204. FIG.

In addition, the control unit 28 controls the operation of the release unit 18 so that the release amount of the material mixture M7 per unit time in the second mode is greater than the release amount of the mixture M7 per unit time in the first mode. do. Thus, by a simple method of adjusting the amount of the mixture M7 discharged from the discharge section 18, the fiber structure manufacturing apparatus 100 can be stopped after the second web M8B with high strength is generated.

The amount of the mixture M7 discharged from the discharge section 18 can be adjusted by adjusting the number of revolutions of the drum section 181 and the amount of the mixture M7 flowing into the drum section 181. FIG.

In addition, the fiber structure manufacturing apparatus 100 includes a forming section 20 that forms the second web M8, which is the deposit, and the control section 28 controls the second web M8B, which is the second deposit, in the forming section 20 in the second mode. The operation of the discharging section 18 and the second web forming section 19 is controlled so that the operation of the discharging section 18 and the second web forming section 19, which are the depositing section, is stopped after the sheet is transported to 20 . As a result, it is possible to prevent or suppress the second web M8 from sticking to the mesh belt 191, calendar roller 203 and heating roller 204 and tearing the second web M8.

Next, the third mode will be explained.
In the third mode, when the receiving unit 283 receives a stop instruction, the second web M8A, which is the first deposit having the first strength, that is, the first thickness T1, is generated and then the discharging unit In this mode, the operation of the second web forming section 19 is controlled to stop the operation of the web forming section 18 and the second web forming section 19 . That is, instead of stopping the operation of the second web forming section 19 immediately after receiving the stop instruction, the operation of the second web forming section 19 is stopped after the second web M8A is generated. Therefore, after the stopped state, the second web M8A is in contact with the mesh belt 191, the calender roller 203, the heating roller 204, and the like.

In this way, when the receiving unit 283 receives a stop instruction, the control unit 28 causes the second web forming unit 19 to stop operating after the second web M8, which is the first deposit, is generated. A third mode of controlling the operation of the web forming section 19 may be implemented. By executing such a third mode, if no condensation occurs, the fiber structure manufacturing apparatus 100 can be stopped after generating the second web M8A having the same strength as in the normal mode. Therefore, when the fiber structure manufacturing apparatus 100 is operated next time, a sheet having the same thickness can be manufactured, so that the sheet manufacturing can be started quickly.

In such a fiber structure manufacturing apparatus 100, when a stop instruction is given during execution of the first mode, either the second mode or the third mode is alternatively selected. These selections are determined by the CPU 281 of the control unit 28 based on instructions input by the operator using the input device 29 and detection results of the detection unit 30 .

The detection unit 30 has a function of detecting the environmental temperature of the fiber structure manufacturing apparatus 100 in this embodiment. The detection unit 30 may be provided inside the fiber structure manufacturing apparatus 100 or may be provided outside the fiber structure manufacturing apparatus 100 . Information on the temperature detected by the detection unit 30 , that is, information on the detection result is transmitted to the control unit 28 .

Then, the CPU 281 determines whether or not the temperature detected by the detection unit 30 is equal to or higher than the threshold value stored in the storage unit 282 . The threshold value is a temperature at which dew condensation tends to occur inside the fiber structure manufacturing apparatus 100, and is a value obtained experimentally in advance.

The CPU 281 selects the second mode when determining that the temperature detected by the detection unit 30 is equal to or higher than the threshold, and selects the third mode when determining that the temperature detected by the detection unit 30 is less than the threshold. .

Thus, the fiber structure manufacturing apparatus 100 includes the detection unit 30, which is a temperature detection unit that detects the environmental temperature of the fiber structure manufacturing apparatus 100, and the control unit 28 detects the temperature when the reception unit 283 receives a stop instruction. Secondly, either the second mode or the third mode is selected based on the detection result of the detection section 30 . Thereby, for example, it is possible to adopt a configuration in which the second mode is executed only when there is a high possibility that dew condensation will occur. Therefore, it is possible to prevent or suppress execution of the second mode even though dew condensation does not occur. As a result, it is possible to prevent the raw material M1 from being wasted.

In this embodiment, the CPU 281 selects the second mode or the third mode based on the temperature information detected by the detection unit 30. However, the present invention is not limited to this. A configuration may be employed in which a humidity detection unit for detecting is provided, and the second mode and the third mode are selected based on the detection result of the humidity detection unit. Moreover, the configuration may be such that the detection unit 30 and the humidity detection unit are provided, and the second mode and the third mode are selected based on the detection results of both the detection unit 30 and the humidity detection unit.

In addition, without being limited to the above configuration, a dew condensation detection unit that directly detects dew condensation on the mesh belt 191, the calendar roller 203, the heating roller 204, etc. is provided, and based on the detection result of the dew condensation detection unit, the second mode and the third mode are provided. may be configured to select.

As described above, the fiber structure manufacturing apparatus 100 of the present invention includes the discharging section 18 that discharges the mixture M7, which is a material containing fibers, and the conveying section that accumulates and conveys the mixture M7 discharged from the discharging section 18. 40, the discharge section 18 and the second web forming section 19 being the deposition section that produces the second web M8 on which the mixture M7 is deposited, and the actuation of the discharge section 18 and the second web forming section 19. It has a receiving portion 283 that receives an instruction or a stop instruction to stop the operation of the discharging portion 18 and the second web forming portion 19, and based on the instruction received by the receiving portion 283, the discharging portion 18 and the second web forming portion and a control unit 28 that controls the operation of 19 . Further, when the receiving unit 283 receives the operation instruction, the control unit 28 controls the discharging unit 18 and the second web forming unit 19 to generate the second web M8A, which is the first deposit having the first strength. A first mode for controlling the operation and a second web M8, which is a second deposit having a second strength higher than the first strength when the receiving unit 283 receives a stop instruction, is generated. and a second mode of controlling the operation of the ejection section 18 and the second web forming section 19 to stop the operation of the ejection section 18 and the second web forming section 19 thereafter. As a result, it is possible to prevent or suppress damage to the web due to dew condensation occurring in the fiber structure manufacturing apparatus 100 when restarting. More specifically, in the present invention, instead of stopping the operations of the discharging section 18 and the second web forming section 19 immediately after receiving the stop instruction, the discharging section 18 and the second web former 19 are deactivated. Therefore, the second web M<b>8</b>B having high strength is in contact with the conveying section 40 after the stopped state. Therefore, when the second web M8B sticks to the conveying section 40 due to dew condensation on the conveying section 40 during the stopped state, the second web M8B has sufficient strength even if each section is driven as it is. Therefore, it is possible to prevent or suppress the second web M8B from being torn and damaged.

In the present embodiment, the magnitude of strength is described as the magnitude of thickness, but the present invention is not limited to this, and the magnitude of strength may be reproduced by the length of the average fiber length. It may be reproduced by changing the amount of supply. When the magnitude of the strength is reproduced by the length of the average fiber length, it is preferable to have a configuration including a first release portion for releasing short fibers and a second release portion for releasing long fibers. Further, when the magnitude of the strength is reproduced by the magnitude of the supply amount of the paper strength agent, it is preferable to provide a paper strength agent supply unit that supplies the strength agent to the second web M8.

Next, the operation of selecting the mode among the control operations of the control unit 28 will be described with reference to the flowchart shown in FIG.

First, in step S101, it is determined whether to start sheet manufacturing. The determination in this step is made based on, for example, whether or not the input device 29 has given an instruction to start sheet manufacturing.

When it is determined in step S101 that sheet manufacturing is to be started, the first mode is executed in step S102. Next, in step S103, it is determined whether or not to stop manufacturing the sheet. The determination in this step is made, for example, based on whether or not there is an instruction from the input device 29 to stop manufacturing the sheet.

If it is determined in step S103 that the sheet manufacturing should be stopped, it is determined in step S104 whether or not to execute the second mode. The determination in this step is made based on an instruction input from the input device 29, for example. If it is determined to execute the second mode in step S104, the second mode is executed in step S105, and if it is determined not to execute the second mode in step S104, the third mode is executed in step S106. .

As described above, the fiber structure manufacturing method of the present invention includes the discharging section 18 that discharges the mixture M7, which is a material containing fibers, and the conveying section 40 that accumulates and conveys the mixture M7 discharged from the discharging section 18. and a discharge section 18 and a second web forming section 19 which are deposition sections for producing a second web M8 on which the mixture M7 is deposited, and an operation instruction for operating the discharge section 18 and the second web forming section 19. Alternatively, it has a receiving portion 283 that receives a stop instruction to stop the operations of the discharging portion 18 and the second web forming portion 19, and controls the operation of the second web forming portion 19 based on the instruction received by the receiving portion 283. A fiber structure manufacturing method for manufacturing a sheet using a fiber structure manufacturing apparatus 100 having a controller 28 that Further, when the receiving unit 283 receives the operation instruction, the control unit 28 controls the discharging unit 18 and the second web forming unit 19 to generate the second web M8A, which is the first deposit having the first strength. A first mode for controlling the operation and a second web M8, which is a second deposit having a second strength higher than the first strength when the receiving unit 283 receives a stop instruction, is generated. and a second mode of controlling the operation of the ejection section 18 and the second web forming section 19 to stop the operation of the ejection section 18 and the second web forming section 19 thereafter. As a result, it is possible to prevent or suppress damage to the web due to dew condensation occurring in the fiber structure manufacturing apparatus 100 when restarting. More specifically, in the present invention, instead of stopping the operations of the discharging section 18 and the second web forming section 19 immediately after receiving the stop instruction, the discharging section 18 and the second web former 19 are deactivated. Therefore, the second web M<b>8</b>B having high strength is in contact with the conveying section 40 after the stopped state. Therefore, when the second web M8B sticks to the conveying unit 40 due to dew condensation on the conveying unit 40 during the stopped state, the second web M8B has sufficient strength even if each unit is driven as it is. Therefore, it is possible to prevent or suppress the second web M8B from being torn and damaged.

Although the illustrated embodiments of the fiber structure manufacturing apparatus and the fiber structure manufacturing method of the present invention have been described above, the present invention is not limited to this, and each part constituting the fiber structure manufacturing apparatus includes: It can be replaced with any configuration capable of exhibiting similar functions. Moreover, arbitrary components may be added.

In the above embodiment, the case where the second mode and the third mode are executed after receiving the stop instruction has been described, but the present invention is not limited to this, and only the second mode is executed after receiving the stop instruction. It may be configured to

REFERENCE SIGNS LIST 11 raw material supply unit 12 crushing unit 13 fibrillation unit 14 sorting unit 15 first web forming unit 16 subdividing unit 17 mixing unit 18 discharging unit 19 second second Web forming unit 20 Molding unit 21 Cutting unit 22 Stock unit 27 Collecting unit 28 Control unit 29 Input device 30 Detection unit 40 Conveying unit 100 Fabric structure manufacturing Apparatus 121... Crush blade 141... Drum part 142... Housing part 151... Mesh belt 152... Tension roller 153... Suction part 161... Propeller 162... Housing part 171... Binder supply part, 172... Tube, 173... Blower, 174... Screw feeder, 181... Drum part, 182... Housing part, 191... Mesh belt, 192... Tension roller, 193... Suction part, 201... Pressurizing part, 202... Heating part, 203...calender roller 204...heating roller 211...first cutting section 212...second cutting section 231...humidification section 232...humidification section 233...humidification section 234...humidification section 235...humidification section 236 Humidification unit 241 Tube 242 Tube 243 Tube 244 Tube 245 Tube 246 Tube 261 Blower 262 Blower 263 Blower 281 CPU 282 Storage unit 283 ... Receiving part, M1 ... Raw material, M2 ... Crude fragment, M3 ... Defibrillated material, M4-1 ... First sorted material, M4-2 ... Second sorted material, M5 ... First web, M6 ... Subdivided body, M7 ... mixture, M8...second web, M8A...second web, M8B...second web, P1...binder, S...sheet, T1...first thickness, T2...second thickness

Claims (8)

a depositing part that has a discharge part that discharges a material containing fibers and a conveying part that conveys the material discharged from the discharge part while depositing the material, and that generates a deposit on which the material is deposited;
A control unit that has a reception unit that receives an operation instruction to operate the deposition unit or a stop instruction to stop operation of the deposition unit, and that controls the operation of the deposition unit based on the instruction received by the reception unit. and
The control unit controls the operation of the deposition unit to generate a first deposit having a first intensity when the reception unit receives the operation instruction; Controlling the operation of the deposition unit so as to stop the operation of the deposition unit after generating a second deposit having a second strength higher than the first strength when a stop instruction is received. and a second mode for producing a fiber structure. 3. The control unit controls the operation of the deposition unit so as to stop the operation of the deposition unit after forming the second deposit thicker than the thickness of the first deposit in the second mode. 2. The fiber structure manufacturing apparatus according to 1. The fiber structure according to claim 2, wherein the control section controls the operation of the conveying section so that the conveying speed of the deposit is slower in the second mode than the conveying speed of the deposit in the first mode. body manufacturing equipment. The control unit controls the operation of the release unit so that the release amount of the material per unit time in the second mode is greater than the release amount of the material per unit time in the first mode. 4. The fiber structure manufacturing apparatus according to 2 or 3. A molding unit that molds the deposit,
5. The controller according to any one of claims 1 to 4, wherein in the second mode, the control unit controls the operation of the deposition unit so as to stop the operation of the deposition unit after conveying the second deposit to the molding unit. 2. The fiber structure manufacturing apparatus according to item 1. The control unit executes a third mode of controlling the operation of the deposition unit so as to stop the operation of the deposition unit after generating the first deposit when the reception unit receives the stop instruction. 6. The apparatus for manufacturing a fiber structure according to any one of claims 1 to 5. The fiber structure manufacturing apparatus according to claim 6, wherein the control section selects one of the second mode and the third mode when the reception section receives the stop instruction. a depositing part that has a discharge part that discharges a material containing fibers and a conveying part that conveys the material discharged from the discharge part while depositing the material, and that generates a deposit on which the material is deposited;
A control unit that has a reception unit that receives an operation instruction to operate the deposition unit or a stop instruction to stop operation of the deposition unit, and that controls the operation of the deposition unit based on the instruction received by the reception unit. and a fiber structure manufacturing method for manufacturing a sheet using a fiber structure manufacturing apparatus comprising:
The control unit controls the operation of the deposition unit to generate a first deposit having a first intensity when the reception unit receives the operation instruction; Controlling the operation of the deposition unit so as to stop the operation of the deposition unit after generating a second deposit having a second strength higher than the first strength when a stop instruction is received. and a second mode for producing a fiber structure.

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