JP6414154B2 - Sheet manufacturing apparatus and sheet manufacturing method - Google Patents

Description

  The present invention relates to a sheet manufacturing apparatus and a sheet manufacturing method.

2. Description of the Related Art Conventionally, in a sheet manufacturing apparatus, a so-called wet method has been adopted in which a raw material containing fibers is introduced into water, disaggregated mainly by a mechanical action, and remade (for example, see Patent Document 1).
Such a wet type sheet manufacturing apparatus requires a large amount of water, and the apparatus becomes large. Furthermore, it takes time and effort to maintain the water treatment facility, and energy related to the drying process increases.

Thus, for the purpose of downsizing and energy saving, a dry sheet manufacturing apparatus that uses water as little as possible has been proposed (see, for example, Patent Document 2). In Patent Document 2, a piece of paper is defibrated in a dry defibrating machine, and the defibrated material (fibers) is passed through a small hole screen on the surface of the forming drum and deposited on a mesh belt to form a paper. It is described.

JP 2013-87368 A JP 2012-144819 A

Patent Document 1 describes that in the operation stop mode, the supply of a new paper material into the head box is stopped, and after the entire amount of the paper material remaining in the head box is made, the operation is stopped. Patent Document 2 does not describe any control at the time of operation stop.
When the technical matter described in is applied to a dry sheet manufacturing apparatus exemplified in Patent Document 2,
After all the material in the forming drum is discharged, the operation is stopped. In this case, when the apparatus is stopped, it takes time until all the material in the forming drum is discharged, and when the apparatus is activated, it takes time to accumulate the material in the forming drum and stably discharge the material.

SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following aspects or application examples.

(1) One aspect of the sheet manufacturing apparatus according to the present invention is:
A supply unit for supplying strips cut from raw materials composed of materials containing fibers ;
A defibrating unit that defibrates the fine pieces by dry defibrating,
A sieve part through which the defibrated material passes,
A control unit that controls the supply unit, the defibrating unit, and the sieving unit, and a sheet manufacturing apparatus comprising:
The control unit, when stopping production of the sheet, stops the supply unit and then stops the sieving unit, and stops the supply unit and then stops the defibrating unit. the second performs a stop control, a.
(2) In the sheet manufacturing apparatus according to the present invention,
The sieving part may include a first sieving part for sorting the defibrated material and a second sieving part for loosening the sorted material sorted by the first sieving part.
(3) In the sheet manufacturing apparatus according to the present invention,
The first sieve part has a first sieve main body part provided with a plurality of openings, and the sorted matter passes through the openings of the first sieve main body part that moves at a first speed. Is a thing,
The second sieving part has a second sieving body part provided with a plurality of openings, and passes the opening of the second sieving body part that moves at a second speed to loosen the selection. Good.
(4) In the sheet manufacturing apparatus according to the present invention,
In the first stop control, the controller changes the moving speed of the first sieve main body to a speed lower than the first speed and stops the second sieve before stopping the sieve. You may perform speed change control which changes the moving speed of a main-body part to a speed lower than said 2nd speed.
(5) In the sheet manufacturing apparatus according to the present invention,
In the first stop control, the controller changes the moving speed of the first sieve main body to a speed lower than the first speed and stops the second sieve before stopping the sieve. You may perform speed change control which changes the moving speed of a main-body part to a speed higher than said 2nd speed.
(6) In the sheet manufacturing apparatus according to the present invention,
In the first stop control, the control unit performs speed change control to change the moving speed of the first sieve main body to a speed higher than the first speed before stopping the sieve part. then, the moving speed of the second have shake the body portion may perform the speed change control for changing to a higher speed than the second speed.
Further, one aspect of the sheet manufacturing apparatus according to the present invention is as follows.
Introducing at least a part of the defibrated material that has been defibrated, moving at a first speed and passing through the defibrated material from a plurality of openings provided in the main body,
A molding unit that molds a sheet using the passing material that has passed through the opening of the sieve unit,
The sieve part is stopped in a state where the introduced defibrated material is stored inside the sieve part.

Here, “the state in which the defibrated material is stored inside the sieve part” means that when the sieve part is moved in that state, the defibrated substance inside the sieve part passes through the opening. It is said that defibrated material remains inside.

In such a sheet manufacturing apparatus, the time until the apparatus stops can be shortened by stopping the sieve part in a state where the defibrated material is stored inside the sieve part. Moreover, if the apparatus is started in this state, the defibrated material stored in the inside of the sieving part passes through the opening, so that it is possible to shorten the time until the manufacture of the sheet is started.

In the sheet manufacturing apparatus according to the present invention,
In a state where the defibrated material is introduced into the sieve part, the defibrated material may be stored in the sieve part by stopping the movement of the main body part.

In such a sheet manufacturing apparatus, since the defibrated material is introduced into the sieving portion while the movement of the main body portion is stopped, the defibrated material is easily stored in the sieving portion. Can do.

In the sheet manufacturing apparatus according to the present invention,
In a state where the defibrated material is introduced into the sieve portion, the defibrated material is stored inside the sieve portion by moving the main body portion at a speed lower than the first speed. It is good.

In such a sheet manufacturing apparatus, the amount of the defibrated material that passes through the opening is reduced by making the moving speed of the main body portion lower than the first speed in a state where the defibrated material is introduced into the sieve portion. On the other hand, since the defibrated material is introduced into the sieving portion, the defibrated material can be stored inside the sieving portion.

In the sheet manufacturing apparatus according to the present invention,
In a state where the defibrated material is introduced into the sieve portion, the body portion is moved at a speed higher than the first speed, and the defibrated material is stored inside the sieve portion, The movement of the main body may be stopped.

In such a sheet manufacturing apparatus, the defibration that is introduced before the sieving portion is stopped by making the moving speed of the main body portion higher than the first speed while the defibrated material is being introduced into the sieving portion. Even when the amount of material decreases, the amount of defibrated material that passes through the opening can be maintained, and the quality of the manufactured sheet can be maintained. In addition, when the defibrated material is stored inside the sieve part (before all of the defibrated material inside the sieve part passes through the opening), the time until the device stops is stopped. Can be shortened.

(7) One aspect of the method for producing a sheet according to the present invention is as follows:
A supply unit for supplying strips cut from raw materials composed of materials containing fibers ;
A defibration step to the defibrated material in fibrillation process the strip in the dry,
A method of producing a sheet from the defibrated material that has been subjected to the sieving step, comprising a sieving step of sieving the defibrated material,
When stopping the production of the sheet, after stopping the supply step, the first stop step of stopping the sieving step ,
After the supply process is stopped, a second stop process for stopping the defibrating process is performed .
In addition, one aspect of the method for producing a sheet according to the present invention is as follows.
At least a part of the defibrated material that has been defibrated is introduced into the sieve part, the body part of the sieve part is moved at a first speed, and the defibrated material is removed from a plurality of openings provided in the body part. Passing it through; and
Forming a sheet using the passing material that has passed through the opening of the sieve part, and a method for producing a sheet,
The sieve part is stopped in a state where the introduced defibrated material is stored inside the sieve part.

In such a sheet manufacturing method, the time until the apparatus stops can be shortened by stopping the sieve part in a state where the defibrated material is stored inside the sieve part. Moreover, if the apparatus is started in this state, the defibrated material stored in the inside of the sieving part passes through the opening, so that it is possible to shorten the time until the manufacture of the sheet is started.

The figure which shows typically the sheet manufacturing apparatus which concerns on this embodiment. The perspective view which shows a 1st sieve part typically. The functional block diagram of the sheet manufacturing apparatus which concerns on this embodiment. The flowchart figure which shows the flow of the stop control in a 1st Example. The flowchart figure which shows the flow of the stop control in a 2nd Example. The flowchart figure which shows the flow of stop control in a 3rd Example. The flowchart figure which shows the flow of the stop control in a 4th Example. The flowchart figure which shows the flow of starting control in a 5th Example. The flowchart figure which shows the flow of starting control in a 6th Example. The flowchart figure which shows the flow of starting control in a 7th Example. The flowchart figure which shows the flow of starting control in an 8th Example.

DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The embodiments described below do not unduly limit the contents of the present invention described in the claims. In addition, not all of the configurations described below are essential constituent requirements of the present invention.

1. Configuration FIG. 1 is a diagram schematically illustrating a sheet manufacturing apparatus 100 according to the present embodiment. As shown in FIG. 1, the sheet manufacturing apparatus 100 includes a supply unit 10, a defibrating unit 20, a classification unit 30, a first sieve unit 40, a resin supply unit 50, a second sieve unit 60, and molding. Part 70.

The supply part 10 (crushing part) supplies raw materials, such as a pulp sheet and a thrown sheet (for example, A4-size waste paper), to the defibrating part 20 while cutting in air into fine pieces. Although the shape and size of the strip are not particularly limited, for example, it is a strip of several cm square. In the example shown in the drawing, the supply unit 10 has a crushing blade 11, and can feed and supply the input raw material to the downstream by the rotating crushing blade 11 while cutting. Although the supply part 10 has a function as a crushing part which cuts a raw material (material containing a fiber) and a function as a supply part which supplies a raw material, only the function as a supply part may be sufficient. In addition, you may have a crushing part and a supply part separately. As the supply unit, a sheet feeding unit that supplies the raw material in a sheet form may be provided separately.

The strips cut by the supply unit 10 are received by the hopper 15 and then conveyed to the defibrating unit 20 via the first conveyance unit 81. The first transport unit 81 communicates with the introduction port 21 of the defibrating unit 20. The shape of the 1st conveyance part 81 and the 2nd-6th conveyance parts 82-86 mentioned later is a tubular shape, for example.

The defibrating unit 20 performs a defibrating process on a strip (a material to be defibrated). The defibrating unit 20 generates fibers that have been unraveled into a fibrous shape by defibrating the strip.

Here, the “defibration treatment” refers to unraveling a strip formed by binding a plurality of fibers into one fiber. What has passed through the defibrating unit 20 is referred to as “defibrated material”. In addition to the unraveled fibers, the “defibrated material” includes resin particles separated from the fibers when unraveling the fibers (resin for binding multiple fibers), ink, toner, and anti-bleeding material. In some cases, the ink particles may be included. In the following description, the “defibrated material” is at least a part of what has passed through the defibrating unit 20, and what is added after passing through the defibrating unit 20 may be mixed. Further, the “defibrated material” refers to what is defibrated by the defibrating unit 20.

The defibrating unit 20 separates resin particles adhering to the fine pieces and ink particles such as ink, toner, and a bleeding preventing material from the fibers. Resin particles and ink particles are discharged from the discharge port 22 together with the defibrated material. The defibrating unit 20 performs a defibrating process on the strip introduced from the introduction port 21 with a rotary blade.
The defibrating unit 20 performs defibration in a dry manner in the air.

The defibrating unit 20 preferably has a mechanism for generating an airflow. In this case, the defibrating unit 20 can suck the fine pieces together with the airflow from the introduction port 21 by the airflow generated by itself, perform the defibrating process, and convey the strip to the discharge port 22. The defibrated material discharged from the discharge port 22 is introduced into the classification unit 30 via the second transport unit 82. In addition, when using the defibrating part 20 which does not have an airflow generation mechanism, you may provide the mechanism which generate | occur | produces the airflow which guides a strip to the inlet 21 by external attachment.

The classification unit 30 separates and removes resin particles and ink particles from the defibrated material. As the classification unit 30, an airflow classifier is used. The airflow classifier generates a swirling airflow and separates it according to the size and density of what is classified as centrifugal force, and the classification point can be adjusted by adjusting the velocity and centrifugal force of the airflow. Specifically, a cyclone, an elbow jet, an eddy classifier, or the like is used as the classification unit 30. In particular, since the structure of the cyclone is simple, it can be suitably used as the classification unit 30. Below, as the classification unit 30,
A case where a cyclone is used will be described.

The classifying unit 30 has at least an introduction port 31, a lower discharge port 34 provided in the lower portion, and an upper discharge port 35 provided in the upper portion. In the classification unit 30, the inlet 31
The airflow on which the defibrated material introduced from is placed is moved in a circumferential direction. As a result, centrifugal force is applied to the introduced defibrated material, so that the fiber material (the unraveled fiber) and the fiber material Separated into smaller and lower density waste (resin particles, ink particles). The fiber material is discharged from the lower discharge port 34 and is introduced into the introduction port 46 of the first sieve unit 40 through the third transport unit 83. On the other hand, the waste is discharged from the upper discharge port 35 to the outside of the classification unit 30 through the fourth transport unit 84.

In addition, although described that it isolate | separates into a fiber and a waste by the classification | category part 30, it cannot necessarily be separated correctly. A relatively small thing or a low density thing of a textile thing may be discharged outside with waste. In addition, waste that is relatively dense or entangled with the fiber may be introduced into the first sieve unit 40 together with the fiber. In the present application, what is discharged from the lower discharge port 34 (those containing a long fiber more than waste) is called “fiber”, and what is discharged from the upper discharge port 35 (a proportion containing long fibers is a fiber). Less waste) is called "waste". In addition, when the raw material is not waste paper but a pulp sheet, since the thing corresponding to a waste is not contained, the classification part 30 may be abbreviate | omitted as a structure of the sheet manufacturing apparatus 100. FIG.

The first sieving part 40 (an example of the sieving part) is a fiber separated by the classifying part 30 (classifying part 30).
Is omitted, the defibrated material that has been defibrated by the defibrating unit 20 is sorted in the air into “passing material” that passes through the first sieving part 40 and “residue” that does not pass through. .

FIG. 2 is a perspective view schematically showing the first sieving portion 40. As shown in FIG. 2, the main body 48 of the first sieving part 40 includes a net part 41, disk parts 44 and 45, an introduction port 46, and a discharge port 47.
And have. The main body 48 is a rotary sieve in which a cylindrical net 41 is rotated (an example of movement) around a rotation axis Q by a motor (not shown). The net part 41 has a plurality of openings 42, and the inside of the net part 41 is hollow. As the mesh part 41 rotates, the fiber material introduced into the mesh part 41 passes through the opening 42 and passes through the opening 42 and does not pass through the opening 42. That is, the 1st sieve part 40 can select the fiber (passage | passing material) shorter than fixed length from a fiber thing. The mesh part 41 is composed of a wire mesh such as a plain weave wire mesh or a welded wire mesh. In the first sieving section 40, a mesh section 41 made of a wire mesh is used.
Instead of this, an expanded metal obtained by extending a cut metal plate may be used, or a punching metal in which holes are formed in a metal plate by a press or the like may be used. In the case of using expanded metal, the opening is a hole formed by extending a cut formed in a metal plate. When using a punching metal, the opening is a hole formed in a metal plate with a press or the like. Moreover, you may make the member which has an opening with materials other than a metal. Moreover, the main-body part of the 1st sieve part 40 is changed into a cylindrical sieve, and the flat sieve which has a some opening (net | network part) (
You may comprise by a flat sieve. In this case, the main body portion of the first sieving portion 40 reciprocates (an example of movement) and allows the fibrous material to pass through the plurality of openings.

The disc parts 44 and 45 of the first sieving part 40 are arranged in two openings formed at the end parts by making the net part 41 cylindrical. The disk portion 44 is provided with an introduction port 46 for introducing a fiber material, and the disk portion 45 is provided with a discharge port 47 for discharging a residue. First sieve part 4
When 0 rotates, the net part 41 rotates, and the disk parts 44, 45, the inlet 46 and the outlet 47 do not rotate. The disc parts 44 and 45 are in contact with the end part of the net part 41 so that the net part 41 can rotate.
The disk portions 44 and 45 and the mesh portion 41 are in contact with each other without any gap, thereby preventing the fiber in the mesh portion 41 from leaking outside.

The residue that has not passed through the opening 42 of the first sieve portion 40 is discharged from the discharge port 47,
It is transported to the hopper 15 via the fifth transport unit 85 as a return flow path and returned to the defibrating unit 20 again. On the other hand, the passing material that has passed through the opening 42 of the first sieving part 40 is received by the hopper 16 and then conveyed to the inlet 66 of the second sieving part 60 via the sixth conveying part 86. The sixth transport unit 86 is provided with a supply port 51 for supplying a resin that binds fibers (bonds defibrated materials).

The resin supply unit 50 supplies resin in the air from the supply port 51 to the sixth transport unit 86. That is, the resin supply unit 50 is configured so that the passing material that has passed through the opening of the first sieve unit 40 travels along the path from the first sieve unit 40 to the second sieve unit 60 (the first sieve unit 40 and the second sieve unit 60). Between),
Supply resin. Although it will not specifically limit as the resin supply part 50 if resin can be supplied to the 6th conveyance part 86, A screw feeder, a circle feeder, etc. are used. The resin supplied from the resin supply unit 50 is a resin for binding a plurality of fibers. When the resin is supplied to the sixth transport unit 86, the plurality of fibers are not bound. The resin is cured when passing through the molding unit 70 described later, and binds a plurality of fibers. The resin is a thermoplastic resin or a thermosetting resin, and may be fibrous or powdery. Resin supply unit 50
The amount of resin supplied from is appropriately set according to the type of sheet to be manufactured. In addition,
In addition to the resin that binds the fibers, a colorant for coloring the fibers and an aggregation preventing material for preventing aggregation of the fibers may be supplied depending on the type of the sheet to be produced. Note that the resin supply unit 50 may be omitted as a configuration of the sheet manufacturing apparatus 100.

The resin supplied from the resin supply unit 50 is mixed with the passing material that has passed through the opening of the first sieve unit 40 by a mixing unit (not shown) provided in the sixth transport unit 86. The mixing unit generates an air flow for transporting the passing material and the resin to the second sieving unit 60 while mixing them.

The 2nd sieve part 60 (an example of a sieve part) loosens the entangled passage thing. Furthermore, when the resin supplied from the resin supply unit 50 is in a fibrous form, the second sieve unit 60 loosens the entangled resin. Moreover, the 2nd sieve part 60 deposits a passage material and resin uniformly on the depositing part 72 mentioned later. In other words, the term “unwind” includes the action of breaking up intertwined things and the action of depositing them uniformly. If there is no entanglement, the film is uniformly deposited. The second sieving part 60 is a rotary sieve in which a cylindrical mesh part is rotated by a motor (not shown). Here, the “sieving” used as the second sieving unit 60 may not have a function of selecting a specific object. That is, the “sieving” used as the second sieving part 60 means that having a mesh part having a plurality of openings, and the second sieving part 60 is a fiber material introduced into the second sieving part. All of the resin may be discharged to the outside through the opening. In this case, the size of the opening of the second sieving portion is set to be equal to or larger than the size of the opening of the first sieving portion 40. The difference in configuration between the second sieving part 60 and the first sieving part 40 is the second sieving part 60.
Does not have a discharge port (a portion corresponding to the discharge port 47 of the first sieve portion 40).
Similarly to the first sieving part 40, the main body part of the second sieving part 60 may be constituted by a flat sieve having a plurality of openings and reciprocating. In addition, as a structure of the sheet manufacturing apparatus 100, any one of the 1st sieve part 40 and the 2nd sieve part 60 may be abbreviate | omitted.

A passing material (fiber) that has passed through the first sieving part 40 while the second sieving part 60 is rotating.
The mixture of resin and resin is introduced from the introduction port 66 into the inside of the second sieving part 60 formed of a cylindrical net part. The mixture introduced into the second sieving part 60 moves to the mesh part side by centrifugal force.
As described above, the mixture introduced into the second sieving part 60 may contain entangled fibers and resin, and the entangled fibers and resin are loosened in the air by the rotating mesh part. The loosened fibers and resin pass through the openings. The fibers and the resin that have passed through the openings pass through the air and are uniformly deposited on the deposition portion 72 described later.

The fiber and the resin that have passed through the opening of the second sieving part 60 are deposited on the deposition part 72 of the molding part 70. The forming unit 70 includes a deposition unit 72, a stretching roller 74, a heater roller 76, a tension roller 77, and a take-up roller 78. The molding part 70
A sheet is formed using the passing material (fiber material and resin) that has passed through the second sieve portion 60.

The depositing unit 72 of the molding unit 70 receives and deposits the fiber and the resin that have passed through the opening of the second sieve unit 60 to generate a deposit. The deposit part 72 is located below the second sieve part 60. The accumulation unit 72 is, for example, a mesh belt. A mesh stretched by a stretch roller 74 is formed on the mesh belt. The deposition unit 72 moves as the stretching roller 74 rotates. While the deposition part 72 continuously moves, the second sieving part 60
As a result, the defibrated material and the resin are continuously piled up to form a web having a uniform thickness on the deposition portion 72.

A suction device (not shown) for sucking deposits from below is provided below the depositing unit 72. The suction device is located below the second sieve part via the deposition part 72, and generates a downward airflow (an airflow directed from the second sieve part 60 to the deposition part 72). This
The defibrated material and the resin dispersed in the air can be sucked, and the discharge speed from the second sieving part 60 can be increased. As a result, the productivity of the sheet manufacturing apparatus 100 can be increased. Further, the suction device can form a downflow in the defibrated material and the resin dropping path, and can prevent the defibrated material and the resin from being entangled during the dropping.

The defibrated material and the resin deposited on the deposition unit 72 of the molding unit 70 are heated and pressurized by passing through the heater roller 76 as the deposition unit 72 moves. By heating, the resin functions as a binder to bind the fibers together, is thinned by pressurization, and further passes through a calendar roller (not shown) to smooth the surface, whereby the sheet P is formed. In the illustrated example, the sheet P is wound up by a winding roller 78. Thus, the sheet P
Can be manufactured.

FIG. 3 shows a functional block diagram of the sheet manufacturing apparatus 100. The sheet manufacturing apparatus 100 is C
A control unit 110 including a PU and a storage unit (ROM, RAM) and an operation unit 120 for inputting operation information are included.

The control unit 110 outputs a control signal to the first to fourth drivers (motor drivers) 111 to 114. The first driver 111 drives the supply unit 10 by controlling the motor of the supply unit 10 based on the control signal. The second driver 112 controls the motor of the defibrating unit 20 based on the control signal to drive the defibrating unit 20. The third driver 113 controls the motor of the first sieving unit 40 based on the control signal to drive the first sieving unit 40. The fourth driver 114 controls the motor of the second sieving unit 60 based on the control signal to drive the second sieving unit 60.

The control unit 110 outputs a control signal to the first to fourth drivers 111 to 114 to drive various motors when receiving operation information for instructing activation (start of manufacturing) of the apparatus from the operation unit 120. When the operation information instructing to stop the apparatus is received from the operation unit 120, a control signal is output to the first to fourth drivers 111 to 114 to stop the driving of various motors. The control unit 110 outputs a control signal to the third driver 113, and
The fourth driver 114 controls the moving speed of the first sieving part 40 (the rotational speed of the net part 41).
A control signal is output to control the moving speed of the second sieving part 60 (the rotational speed of the mesh part).

2. Stop Control Next, a stop control method in the sheet manufacturing apparatus 100 of the present embodiment will be described.

In the sheet manufacturing apparatus 100 of the present embodiment, the first time when the apparatus is stopped (when the manufacturing of the sheet is stopped).
In a state where the defibrated material is stored in the main body portions of the sieve unit 40 and the second sieve unit 60, the first sieve unit 40 and the second sieve unit 60 are stopped.

2-1. First Embodiment FIG. 4 is a flowchart showing a flow of stop control in the first embodiment.

First, the control unit 110 outputs a control signal to the first driver 111 to stop the supply unit 10 (step S10). Next, the control unit 110 connects the third driver 113 and the fourth driver.
A control signal is output to the driver 114 to stop the rotation (an example of movement) of the first sieve unit 40 and the second sieve unit 60 (step S12). Next, the control part 110 outputs a control signal to the 2nd driver 112, and stops the defibrating part 20 (step S14).

Since the defibrating unit 20 is driven even if the supply unit 10 is stopped in step S10, the first
A defibrated material (fiber material) is introduced into the sieving unit 40 from the defibrating unit 20 or a pipe between the defibrating unit 20. Then, by stopping the rotation of the first sieving unit 40 in step S12, the defibrated material is not discharged from the first sieving unit 40 (the defibrated material does not pass through the opening of the first sieving unit 40). As described above, in a state where the defibrated material is introduced into the first sieving portion 40, the defibrated material can be stored inside the first sieving portion 40 by stopping the rotation of the first sieving portion 40. it can.

Similarly, even if the supply unit 10 is stopped in step S10, the defibrating unit 20 and the first sieving unit 4 are used.
Since 0 is driven, the defibrated material (fiber and resin) is introduced into the second sieving part 60 from the first sieving part 40 and the piping between the first sieving part 40. Then, by stopping the rotation of the second sieving unit 60 in step S12, the defibrated material is not discharged from the second sieving unit 60 (the defibrated material does not pass through the opening of the second sieving unit 60). Thus, by stopping the rotation of the second sieving part 60 in a state where the defibrated material is introduced into the second sieving part 60,
The defibrated material can be stored inside the second sieve unit 60.

As described above, by stopping the first sieve unit 40 and the second sieve unit 60 in a state where the defibrated material is stored inside the first sieve unit 40 and the second sieve unit 60, the apparatus is stopped. Can be shortened. Moreover, since the defibrated material has already accumulated in the inside of the 1st sieve part 40 and the 2nd sieve part 60 at the time of the next apparatus start-up, sufficient quantity of defibrated material from the beginning of manufacture is the 1st sieve part 40. And it can supply to the downstream of the 2nd sieve part 60, while being able to shorten the starting time of an apparatus, the quality of a sheet | seat can be stabilized from the beginning of manufacture.

In step S12, the first sieving part 40 and the second sieving part 60 may be stopped simultaneously, or after the first sieving part 40 is stopped, the second sieving part 60 may be stopped, The reverse is also possible. These can be changed within a range in which the defibrated material is stored in the first sieve portion 40 and the second sieve portion 60.

Moreover, it is desirable that the defibrating unit 20 is stopped in step S14 after the defibrated material stored in the defibrating unit 20 has been discharged. This is because if the defibrating unit 20 is driven in a state where it is stored in the defibrating unit 20 at the time of activation, it may become a load and the starting torque may not be sufficient. For this reason, it is desirable to shift the stop of the supply unit 10 in step S10 and the stop of the defibrating unit 20 in step S14 by a time during which the defibrated material in the defibrating unit 20 can be discharged. In the meantime, what is necessary is just to stop in the state which the defibrated material accumulated in the 1st sieve part 40 and the 2nd sieve part 60. FIG.

2-2. Second Embodiment FIG. 5 is a flowchart showing the flow of stop control in the second embodiment.

First, the control unit 110 outputs a control signal to the first driver 111 to stop the supply unit 10 (step S20). Next, the control unit 110 outputs a control signal to the third driver 113 to change the rotation speed of the first sieve unit 40 to a speed lower than the speed during normal operation (first speed) ( In step S22), a control signal is output to the fourth driver 114, and the rotation speed of the second sieving unit 60 is changed to a speed lower than the speed during normal operation (step S24). Next, the control unit 110 includes a third driver 113 and a fourth driver 114.
A control signal is output to stop the rotation of the first sieve unit 40 and the second sieve unit 60 (step S26). Next, the control unit 110 outputs a control signal to the second driver 112,
The defibrating unit 20 is stopped (step S28).

Since the defibrating unit 20 is driven even if the supply unit 10 is stopped in step S20, the first
A defibrated material is introduced into the sieving unit 40 from the defibrating unit 20 or a pipe between the defibrating unit 20. Here, if the rotation of the first sieving part 40 is stopped, the defibrated material introduced into the first sieving part 40 after the defibrated substance is stored in the first sieving part 40 becomes the first sieving part 40. There is a possibility of clogging at the upstream side or inside the first sieving section 40, resulting in poor conveyance.

Therefore, in the second embodiment, in step S22, the first sieve unit 40 is rotated at a lower speed than usual so that the defibrated material from the upstream side is introduced into the first sieve unit 40 without clogging, and The amount of defibrated material discharged from the first sieving unit 40 is reduced, and the defibrated material is stored inside the first sieving unit 40. Similarly, in step S24, the second sieve 60 is rotated at a lower speed than usual so that the defibrated material from the upstream side is introduced into the second sieve 60 without clogging, and the second sieve 60 Reduce the amount of defibrated material discharged from the
The defibrated material is stored inside the second sieve unit 60.

And by stopping rotation of the 1st sieve part 40 and the 2nd sieve part 60 in Step S26, discharge of the defibrated material from the 1st sieve part 40 and the 2nd sieve part 60 is stopped, and the 1st sieve part 40 and the 2nd sieve part 60 are stopped.
The defibrated material can be stored inside the sieving part 40 and the second sieving part 60.

Even when configured as in the second embodiment, as in the first embodiment, the time until the apparatus stops can be shortened, and the startup time of the apparatus can be shortened. Furthermore, in the second embodiment, the defibrated material can be stored in the first sieve portion 40 and the second sieve portion 60 while suppressing the occurrence of conveyance failure.

In addition, only one of the 1st sieve part 40 and the 2nd sieve part 60 is rotated at low speed (
You may comprise so that any one of step S22 and S24 is abbreviate | omitted). Moreover, about the stop of the supply part 10 and the defibrating part 20, it is the same as the idea described in the 1st Example.

2-3. Third Embodiment FIG. 6 is a flowchart showing the flow of stop control in the third embodiment.

First, the control unit 110 outputs a control signal to the first driver 111 to stop the supply unit 10 (step S30). Next, the control unit 110 outputs a control signal to the third driver 113 to change the rotation speed of the first sieving unit 40 to a speed lower than the speed during normal operation (step S32). A control signal is output to the driver 114, and the rotation speed of the second sieving unit 60 is changed to a speed higher than the speed during normal operation (step S34). Next, the control part 110 outputs a control signal to the 3rd driver 113 and the 4th driver 114, and stops rotation of the 1st sieve part 40 and the 2nd sieve part 60 (step S36).
Next, the control part 110 outputs a control signal to the 2nd driver 112, and stops the defibrating part 20 (step S38).

The third embodiment is different from the second embodiment in that the second sieving unit 60 is rotated at a higher speed than usual after the supply unit 10 is stopped. When the supply unit 10 is stopped and the first sieving unit 40 is operated at a low speed, the amount of defibrated material introduced into the second sieving unit 60 decreases, so the second sieving unit 6
The amount of defibrated material discharged from zero also decreases, and the amount of deposits deposited on the depositing portion 72 decreases. The amount of defibrated material discharged from the second sieving part 60 increases as the amount of defibrated material accumulated in the second sieving part 60 increases, and as the rotational speed of the second sieving part 60 increases. Become.

Therefore, in the third embodiment, even if the amount of defibrated material introduced into the second sieving part 60 is reduced by rotating the second sieving part 60 at a higher speed than usual in Step S34, The amount of defibrated material discharged from the sieving part 60 is not changed. Thereby, even during the stop control of the apparatus, the quality (thickness) of the manufactured sheet can be maintained.

In addition, in step S36, before all the defibrated material inside the 2nd sieve part 60 is discharged | emitted (in the state where the defibrated material was stored in the inside of the 2nd sieve part 60), the 2nd sieve part 60 is shown. Stop rotating. As a result, as in the first embodiment, it is possible to shorten the time until the apparatus stops, and to shorten the start-up time of the apparatus. For example, the amount of defibrated material introduced into the second sieving part 60 is so small that the amount of defibrated material discharged from the second sieving part 60 cannot be maintained even when the second sieving part 60 is rotated at high speed. At the timing, the second sieve part 60
Stop rotating.

2-4. Fourth Embodiment FIG. 7 is a flowchart showing the flow of stop control in the fourth embodiment.

First, the control part 110 outputs a control signal to the 1st driver 111, and stops the supply part 10 (step S40). Next, the control part 110 outputs a control signal to the 3rd driver 113, and changes the rotational speed of the 1st sieve part 40 to a speed higher than the speed at the time of normal operation (step S42). Next, the control unit 110 outputs a control signal to the fourth driver 114, and changes the rotation speed of the second sieving unit 60 to a speed higher than the speed during normal operation (step S44). Next, the control part 110 outputs a control signal to the 3rd driver 113 and the 4th driver 114, and stops rotation of the 1st sieve part 40 and the 2nd sieve part 60 (step S46). Next, the control unit 110 outputs a control signal to the second driver 112 to stop the defibrating unit 20 (step S48).

In the fourth embodiment, after the supply unit 10 is stopped, the first sieving unit 40 is rotated at a higher speed than usual, and then the second sieving unit 60 is rotated at a higher speed than usual. Different from the embodiment. When the supply unit 10 is stopped, the amount of defibrated material introduced into the first sieving unit 40 decreases, and thus the amount of defibrated material discharged from the first sieving unit 40 also decreases.

Therefore, in the fourth embodiment, the amount of defibrated material discharged from the first sieve unit 40 is not changed by rotating the first sieve unit 40 at a higher speed than usual in step S42. Here, although the amount of defibrated material introduced into the second sieving part 60 is initially maintained by rotating the first sieving part 40 at a high speed, the supply part 10 is stopped gradually. It will decrease. Therefore, in the fourth embodiment, even if the amount of defibrated material introduced into the second sieving part 60 is reduced by rotating the second sieving part 60 at a higher speed than usual in Step S44, The amount of defibrated material discharged from the sieving part 60 is not changed. Thereby, even during the stop control of the apparatus, the quality (thickness) of the manufactured sheet can be maintained.

In step S46, before all of the defibrated material inside the first sieving part 40 and the second sieving part 60 are discharged (the defibrated material is inside the first sieving part 40 and the second sieving part 60). In the stored state), the rotation of the first sieve unit 40 and the second sieve unit 60 is stopped. This
Similar to the first embodiment, the time until the apparatus stops can be shortened, and the start-up time of the apparatus can be shortened.

3. Start Control Next, a start control method in the sheet manufacturing apparatus 100 of the present embodiment will be described.

3-1. Fifth Embodiment FIG. 8 is a flowchart showing the flow of activation control in the fifth embodiment.

First, the control part 110 outputs a control signal to the 2nd driver 112, and starts the defibrating part 20 (step S50). Next, the control part 110 outputs a control signal to the 3rd driver 113, starts the 1st sieve part 40, and rotates it at the speed | rate at the time of normal operation (step S52). Next, the control part 110 outputs a control signal to the 1st driver 111, and starts the supply part 10 (step S54). Next, the control unit 110 includes the fourth driver 11
4 to output a control signal to activate the second sieving unit 60 and rotate it at the speed during normal operation (
Step S56).

Since no material is stored in the defibrating unit 20, the defibrating unit 20 is first activated. Next, the defibrating unit 2
In preparation for the defibrated material from 0 being introduced into the classification unit 30 and the first sieving unit 40, the first sieving unit 40 is activated. Then, the supply part 10 is started and the 2nd sieve part 60 is started. It takes time until a sufficient amount of defibrated material is supplied downstream from the defibrating unit 20 after the supply unit 10 is activated. However, as described above, the first sieve unit 40 and the second sieve unit 60 are used.
Is stopped in a state where defibrated material is stored. Therefore, it starts in the state where the defibrated material is stored inside the first sieve part 40 and the second sieve part 60. Thereby, it is not necessary to stop until the defibrated material is stored inside the first sieve part 40 and the second sieve part 60. And the defibrated material can be supplied to the downstream side of the 1st sieve part 40 and the 2nd sieve part 60 from the beginning of manufacture, and while starting time of an apparatus can be shortened, the quality of a sheet | seat is started from the beginning of manufacture. Can be stabilized. In addition, before starting the supply part 10, it is 1st.
Since the sieving unit 40 is activated, the first sieving unit 40 is activated in a state where the defibrated material is not introduced into the first sieving unit 40. Similarly, the activation of the second sieving unit 60 may be activated in a state where the defibrated material is not introduced from the first sieving unit 40.

3-2. Sixth Embodiment FIG. 9 is a flowchart showing the flow of start control in the sixth embodiment.

First, the control part 110 outputs a control signal to the 2nd driver 112, and starts the defibrating part 20 (step S60). Next, the control unit 110 outputs a control signal to the third driver 113 to activate the first sieving unit 40 and rotate it at a speed during low-speed operation (a speed lower than the speed during normal operation) ( Step S62). Next, the control part 110 outputs a control signal to the 1st driver 111, and starts the supply part 10 (step S64). Next, the control unit 110 outputs a control signal to the fourth driver 114 to activate the second sieving unit 60 and rotate it at a speed during high-speed operation (a speed higher than the speed during normal operation) ( Step S6
6). Next, the control part 110 outputs a control signal to the 3rd driver 113 and the 4th driver 114, and changes the rotational speed of the 1st sieve part 40 and the 2nd sieve part 60 to the speed at the time of normal driving | operation. (Step S68).

The sixth embodiment is different from the fifth embodiment in that the first sieving unit 40 is activated at a speed during low-speed operation and the second sieving unit 60 is activated at a speed during high-speed operation. Until the sufficient amount of defibrated material from the defibrating unit 20 is supplied downstream, the amount of defibrated material introduced into the second sieving unit 60 is small, so the second sieving unit 60 is started at high speed operation. By doing so, the amount of defibrated material discharged from the second sieving part 60 is prevented from fluctuating. In addition, since the amount of defibrated material in the second sieving part 60 decreases rapidly due to the high speed operation, the first sieving part 40 is activated at a low speed operation, and the defibrated material from the upstream side is removed from the first sieving part 40. The defibrated material can be supplied from the first sieving portion 40 to the second sieving portion 60 when the defibrated material inside the second sieving portion 60 disappears.
When a sufficient amount of defibrated material is supplied from the defibrating unit 20 to the downstream side, the first sieving unit 40 and the second sieving unit 60 are changed to normal operation. By doing in this way, the defibrated material can be supplied to the downstream side of the second sieving part 60 from the beginning of production, the start-up time of the apparatus can be shortened, and the quality of the sheet from the beginning of production can be reduced. It can be stabilized.

3-3. Seventh Embodiment FIG. 10 is a flowchart showing the flow of activation control in the seventh embodiment.

First, the control part 110 outputs a control signal to the 2nd driver 112, and starts the defibrating part 20 (step S70). Next, the control unit 110 outputs a control signal to the third driver 113 to activate the first sieving unit 40 and rotate it at a speed during high-speed operation (a speed higher than the speed during normal operation) ( Step S72). Next, the control part 110 outputs a control signal to the 1st driver 111, and starts the supply part 10 (step S74). Next, the control unit 110 outputs a control signal to the fourth driver 114, activates the second sieving unit 60, and rotates it at the speed during normal operation (step S76). Next, the control part 110 outputs a control signal to the 3rd driver 113, and changes the rotational speed of the 1st sieve part 40 to the speed at the time of normal driving | operation (step S78).

The seventh embodiment is different from the fifth embodiment in that the first sieving unit 40 is started at a speed during high-speed operation. Until a sufficient amount of defibrated material is supplied downstream from the defibrating unit 20, the first sieving unit 4 is used.
Since the amount of defibrated material introduced into 0 is small, the amount of defibrated material discharged from the first sieving unit 40 is not changed by starting the first sieving unit 40 at high speed operation. Then, when a sufficient amount of defibrated material is supplied from the defibrating unit 20 to the downstream side, the first sieving unit 4
Change 0 to normal operation. By doing in this way, a defibrated material can be supplied to the downstream side of the 1st sieve part 40 and the 2nd sieve part 60 from the beginning of manufacture, and while starting time of an apparatus can be shortened, manufacture start The sheet quality can be stabilized from the beginning.

3-4. Eighth Embodiment FIG. 11 is a flowchart showing the flow of activation control in the eighth embodiment.

First, the control part 110 outputs a control signal to the 2nd driver 112, and starts the defibrating part 20 (step S80). Next, the control unit 110 outputs a control signal to the third driver 113 to activate the first sieving unit 40 and rotate it at a speed during low-speed operation (a speed lower than the speed during normal operation) ( Step S82). Next, the control part 110 outputs a control signal to the 1st driver 111, and starts the supply part 10 (step S84). Next, the control unit 110 outputs a control signal to the fourth driver 114, activates the second sieving unit 60, and rotates it at the speed during low-speed operation (step S86). Next, the control unit 110 outputs a control signal to the third driver 113 and the fourth driver 114, and the first sieving unit 40.
And the rotational speed of the 2nd sieve part 60 is changed into the speed at the time of normal driving | operation (step S88).

The eighth embodiment is different from the fifth embodiment in that the first sieving section 40 and the second sieving section 60 are started at a speed during low-speed operation. Since it takes time to supply a sufficient amount of defibrated material from the defibrating unit 20 to the downstream side, starting the first sieving unit 40 and the second sieving unit 60 at a low speed operation, When the defibrated material is stored in the first sieve portion 40 and the second sieve portion 60 and a sufficient amount of defibrated material is supplied from the defibrating portion 20 to the downstream side, the first defibrated material is stored. The sieve unit 40 and the second sieve unit 60 are changed to normal operation. By doing in this way, a sufficient amount of defibrated material can be discharged from the second sieving part 60 immediately after the second sieving part 60 is changed to normal operation, and the quality of the sheet can be stabilized.

In steps S82 and S86, at least one of the first sieve unit 40 and the second sieve unit 60 remains stopped instead of starting the first sieve unit 40 and the second sieve unit 60 at low speed operation. (At least one of steps S82 and S86 is omitted)
You may comprise as follows.

4). Modifications The present invention includes substantially the same configuration (configuration with the same function, method and result, or configuration with the same purpose and effect) as the configuration described in the embodiment. In addition, the invention includes a configuration in which a non-essential part of the configuration described in the embodiment is replaced. In addition, the present invention includes a configuration that exhibits the same operational effects as the configuration described in the embodiment or a configuration that can achieve the same object. Further, the invention includes a configuration in which a known technique is added to the configuration described in the embodiment.

In addition, the sheet manufactured by the sheet manufacturing apparatus 100 mainly indicates a sheet shape. However, it is not limited to a sheet shape, and may be a board shape or a web shape. The sheet in this specification is divided into paper and non-woven fabric. The paper includes a mode in which pulp or used paper is used as a raw material and is formed into a thin sheet, and includes recording paper for writing and printing, wallpaper, wrapping paper, colored paper, drawing paper, Kent paper, and the like. Nonwoven fabrics are thicker or lower in strength than paper, such as general nonwoven fabrics, fiber boards, tissue paper, kitchen paper, cleaners, filters,
Includes liquid absorbers, sound absorbers, shock absorbers, mats, etc. The raw material may be plant fibers such as cellulose, chemical fibers such as PET (polyethylene terephthalate) and polyester, and animal fibers such as wool and silk.

In addition, a moisture sprayer for spraying and adding moisture to the deposit accumulated in the deposition unit 72 may be provided. Thereby, the intensity | strength of the hydrogen bond at the time of shape | molding the sheet | seat P can be made high. The spray addition of moisture is performed on the deposit before passing through the heater roller 76. Starch, PVA (polyvinyl alcohol), or the like may be added to the moisture sprayed by the moisture sprayer. Thereby, the strength of the sheet P can be further increased.

In the above example, the form in which the sheet P is taken up by the take-up roller 78 has been described. However, the sheet P may be cut into a desired size by a cutting machine (not shown) and stacked on a stacker or the like.

The sheet manufacturing apparatus 100 may not have a function as a crushing unit in the supply unit 10. For example, if the material is roughly crushed with an existing shredder or the like, the crushing function becomes unnecessary.

The 5th conveyance part 85 as a return channel may not be. The residue may be collected and discarded without returning to the defibrating unit 20. Further, if the defibrating unit 20 has such a performance that no residue is left, the fifth transport unit 85 is not necessary.

10 Supplying Section, 11 Crushing Blade, 15 Hopper, 16 Hopper, 20 Defibration Section, 21
Inlet port, 22 outlet port, 30 classification part, 31 inlet port, 34 lower outlet port, 35 upper outlet port, 40 first sieve part, 41 mesh part, 42 opening, 44 disc part, 45, disc part, 4
6 Inlet, 47 Outlet, 48 Body, 50 Resin Supply, 51 Supply, 60 Second Sieve, 66 Inlet, 70 Molding, 72 Deposition, 74 Tension Roller, 76
Heater roller, 77 tension roller, 78 take-up roller, 81 first transport unit, 82 second transport unit, 83 third transport unit, 84 fourth transport unit, 85 fifth transport unit, 8
6 sixth transport unit, 100 sheet manufacturing apparatus, 110 control unit, 111 first driver, 112 second driver, 113 third driver, 114 fourth driver,
120 Operation unit

Claims (7)

A supply unit for supplying strips cut from raw materials composed of materials containing fibers ;
A defibrating unit that defibrates the fine pieces by dry defibrating,
A sieve part through which the defibrated material passes,
A control unit that controls the supply unit, the defibrating unit, and the sieving unit, and a sheet manufacturing apparatus comprising:
The control unit, when stopping production of the sheet, stops the supply unit and then stops the sieving unit, and stops the supply unit and then stops the defibrating unit. the second performs a stop control, a sheet manufacturing apparatus.   2. The sheet manufacturing apparatus according to claim 1, wherein the sieving part includes a first sieving part that sorts the defibrated material and a second sieving part that loosens the sorted material sorted by the first sieving part. The first sieve part has a first sieve main body part provided with a plurality of openings, and the sorted matter passes through the openings of the first sieve main body part that moves at a first speed. Is a thing,
The second sieving part has a second sieving main body part provided with a plurality of openings, and passes through the opening of the second sieving main body part moving at a second speed to loosen the selection. Item 3. The sheet manufacturing apparatus according to Item 2.   In the first stop control, the controller changes the moving speed of the first sieve main body to a speed lower than the first speed and stops the second sieve before stopping the sieve. The sheet manufacturing apparatus according to claim 3, wherein speed change control is performed to change a moving speed of the main body to a speed lower than the second speed.   In the first stop control, the controller changes the moving speed of the first sieve main body to a speed lower than the first speed and stops the second sieve before stopping the sieve. The sheet manufacturing apparatus according to claim 3, wherein speed change control is performed to change a moving speed of the main body to a speed higher than the second speed. In the first stop control, the control unit performs speed change control to change the moving speed of the first sieve main body to a speed higher than the first speed before stopping the sieve part. then, the moving speed of the second have shake the body portion, the speed change control for changing to a higher speed than the second speed, the sheet manufacturing apparatus according to claim 3. A supplying step of supplying a strip formed by cutting a raw material composed of a material containing fibers ;
A defibration step to the defibrated material in fibrillation process the strip in the dry,
A method of producing a sheet from the defibrated material that has been subjected to the sieving step, comprising a sieving step of sieving the defibrated material,
When stopping the production of the sheet, after stopping the supply step, the first stop step of stopping the sieving step ,
A method for manufacturing a sheet , comprising: a second stopping step of stopping the defibrating step after stopping the supplying step .

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