JP2017087520A - Sheet manufacturing apparatus and sheet manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet manufacturing apparatus capable of reducing a defect caused by insufficient heating or the like.SOLUTION: A sheet manufacturing apparatus includes; an accumulation portion for accumulating a material containing a fiber and a resin; a heating portion 84 which is a heating portion for heating an accumulated object accumulated by the accumulation portion and includes a first rotation body 182 and a second rotation body 183; a displacement mechanism which displaces the heating portion at a first position at which the first rotation body and the second rotation body sandwich the accumulated object and heat the accumulated object and a second position at which the first rotation body and the second rotation body are separated from each other; and a control portion which heats the first rotation body and the second rotation body at the second position, and then displaces the rotation bodies at the first position.SELECTED DRAWING: Figure 2

Description

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

Patent Document 1 discloses a manufacturing apparatus in which a mat-like composition in which a thermosetting resin and a radical initiator are added to a granular or fibrous raw material is hot-pressed to form a fiberboard. The hot press roller in this manufacturing apparatus has a temperature of 110 ° C. to 260 ° C. with respect to the mat-like composition, and 10
A linear pressure corresponding to a pressure of about 150 kgf / cm 2 can be applied.

JP 2001-113509 A

In the above manufacturing apparatus, at the time of starting the apparatus, warm-up is carried out while conveying the mat-like composition remaining between the hot-pressing rollers (heating until the hot-pressing roller reaches a predetermined temperature).
As a result, the mat-like composition could not be heated sufficiently.

One of the objects according to some aspects of the present invention is to provide a sheet manufacturing apparatus and a sheet manufacturing method capable of reducing problems due to insufficient heating or the like.

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 sheet manufacturing apparatus that manufactures a sheet using a raw material including fibers, the deposition unit for depositing a material including fibers and a resin, A heating unit for heating the deposit deposited by the deposition unit, the heating unit including a first rotating body and a second rotating body, and the first rotating body and the second rotating body A displacement mechanism for displacing the heating unit between a first position for sandwiching and heating and a second position where the first rotating body and the second rotating body are separated from each other; and The first rotating body and the second rotating body;
And a controller that displaces the rotating body to the first position after heating.

In such a sheet manufacturing apparatus, after the first rotating body and the second rotating body are heated at a position where the first rotating body and the second rotating body are separated from each other, the deposits are generated by the first rotating body and the second rotating body. By sandwiching and heating, problems due to insufficient heating or the like can be reduced.

(2) One aspect of the sheet manufacturing apparatus according to the present invention is a sheet manufacturing apparatus that manufactures a sheet using a raw material including fibers, the deposition unit for depositing a material including fibers and a resin, A heating unit for heating the deposit deposited by the deposition unit, the heating unit including a first rotating body and a second rotating body, and the first rotating body and the second rotating body A displacement mechanism for displacing the heating unit at a first position for sandwiching and heating and a second position where the first rotating body and the second rotating body are separated from each other; The part is configured such that the first rotating body and the second rotating body can be driven to rotate at the second position.

In such a sheet manufacturing apparatus, the surface temperatures of the first rotating body and the second rotating body are rotated by rotating the first rotating body and the second rotating body at positions where the first rotating body and the second rotating body are separated from each other. Can be made uniform, and problems due to insufficient heating can be reduced.

(3) In the sheet manufacturing apparatus according to the present invention, when the transport of the deposit is started, after the temperature of the heating unit reaches a predetermined temperature, the heating unit is displaced from the second position to the first position. You may have a control part to make.

In such a sheet manufacturing apparatus, when the transport of the deposit is started, the deposit is sandwiched and heated by the first rotating body and the second rotating body after the temperature of the heating unit reaches a predetermined temperature. Therefore, the strength of the sheet can be prevented from partially decreasing due to insufficient heating at the start of conveyance, and the strength of the sheet can be made uniform.

(4) The sheet manufacturing apparatus according to the present invention may include a control unit that displaces the heating unit from the first position to the second position when transporting the deposit is stopped.

In such a sheet manufacturing apparatus, when the conveyance of the deposit is stopped, the first rotating body and the second rotating body are displaced to a position where they are separated from each other, thereby discoloring the deposit due to overheating when the conveyance is stopped. Can be suppressed.

(5) In the sheet manufacturing apparatus according to the present invention, when the heating unit is in the second position,
The circumferential speed of the first rotating body may be different from the circumferential speed of the second rotating body.

(6) In the sheet manufacturing apparatus according to the present invention, the driving unit that rotationally drives the first rotating body, and the driving force generated by the driving unit at the first position without being transmitted to the second rotating body. You may have a transmission mechanism for transmitting the driving force by the said drive part to a said 2nd rotary body in two positions.

In such a sheet manufacturing apparatus, the driving force by the driving unit is transmitted to the second rotating body at the second position, and the driving force by the driving unit is not transmitted to the second rotating body at the first position. By following the first rotating body, the deposit can be stably conveyed by the first rotating body and the second rotating body.

(7) In the sheet manufacturing apparatus according to the present invention, the first rotating body and the second rotating body may not contact the deposit in the second position.

In such a sheet manufacturing apparatus, it is possible to reliably prevent discoloration of deposits due to overheating when conveyance is stopped.

(8) An aspect of the sheet manufacturing method according to the present invention is a sheet manufacturing method for manufacturing a sheet using a raw material including fibers, a step of depositing a material including fibers and a resin, and a first rotating body And heating the deposited deposit using a heating unit including the second rotating body, and when starting the conveyance of the deposit, after the temperature of the heating unit reaches a predetermined temperature, The heating unit is displaced from a position where the first rotating body and the second rotating body are separated from each other to a position where the first rotating body and the second rotating body sandwich and heat a deposit.

In such a sheet manufacturing method, when the conveyance of the deposit is started, the deposit is heated between the first rotating body and the second rotating body after the temperature of the heating unit reaches a predetermined temperature. Thus, the strength of the sheet can be prevented from being partially lowered due to insufficient heating at the start of conveyance, and the strength of the sheet can be made uniform.

It is a figure which shows typically the sheet manufacturing apparatus which concerns on this embodiment. It is a figure which shows typically an example of a heating part (1st position). It is a figure which shows typically an example of a heating part (2nd position). It is a figure which shows an example of a displacement mechanism typically. It is a figure which shows an example of a transmission mechanism typically. It is a flowchart which shows an example of a process of a control part. It is a figure for demonstrating a modification.

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. Overall Configuration First, a sheet manufacturing apparatus according to the present embodiment will be described with reference to the drawings. FIG.
These are figures which show typically the sheet manufacturing apparatus 100 which concerns on this embodiment.

As shown in FIG. 1, the sheet manufacturing apparatus 100 includes a supply unit 10, a manufacturing unit 102, and a control unit 104. The manufacturing unit 102 manufactures a sheet. The manufacturing unit 102 includes a crushing unit 12
The defibrating unit 20, the sorting unit 40, the first web forming unit 45, the rotating body 49, and the mixing unit 50.
And a stacking unit 60, a second web forming unit 70, a sheet forming unit 80, and a cutting unit 90.

The supply unit 10 supplies raw materials to the crushing unit 12. The supply unit 10 is, for example, an automatic input unit for continuously supplying raw materials to the crushing unit 12. The raw material supplied by the supply unit 10 is
For example, it includes fibers such as waste paper and pulp sheet.

The crushing unit 12 cuts the raw material supplied by the supply unit 10 into air into pieces.
The shape and size of the strip is, for example, a strip of several cm square. In the illustrated example, the crushing unit 12 is
The roughing blade 14 is provided, and the raw material charged can be cut by the roughing blade 14. As the crushing part 12, a shredder is used, for example. The raw material cut by the crushing unit 12 is received by the hopper 1 and then transferred (conveyed) to the defibrating unit 20 through the pipe 2.

The defibrating unit 20 defibrates the raw material cut by the crushing unit 12. Here, “defibrate”
The term “unwrapping” a raw material (a material to be defibrated) formed by binding a plurality of fibers into individual fibers. The defibrating unit 20 also has a function of separating substances such as resin particles, ink, toner, and a bleeding inhibitor adhering to the raw material from the fibers.

What has passed through the defibrating unit 20 is referred to as “defibrated material”. In addition to the defibrated fibers that have been unraveled, the “defibrated material” includes resin particles (resins that bind multiple fibers together), ink, toner, etc. In some cases, additives such as colorants, anti-bleeding materials, and paper strength enhancing agents are included. The shape of the defibrated material that has been unraveled is a string shape or a ribbon shape. The unraveled defibrated material may exist in an unentangled state (independent state) with other undisentangled fibers, or entangled with other undisentangled defibrated material to form a lump. It may exist in a state (a state forming a so-called “dama”).

The defibrating unit 20 performs defibration by a dry method. Here, performing a process such as defibration in the air (in the air), not in the liquid, is called dry. Specifically, an impeller mill is used as the defibrating unit 20. The defibrating unit 20 has a function of generating an air flow that sucks the raw material and discharges the defibrated material. As a result, the defibrating unit 20 can suck the raw material together with the airflow from the introduction port 22 with the airflow generated by itself, defibrate, and transport the defibrated material to the discharge port 24. The defibrated material that has passed through the defibrating unit 20 is transferred to the sorting unit 40 via the tube 3. In addition, the airflow for conveying a defibrated material from the defibrating unit 20 to the sorting unit 40 may use an airflow generated by the defibrating unit 20, or an airflow generation device such as a blower is provided, May be used.

The sorting unit 40 introduces the defibrated material defibrated by the defibrating unit 20 from the introduction port 42 and sorts the defibrated material according to the length of the fiber. The sorting unit 40 includes a drum unit 41 and a housing unit 43 that accommodates the drum unit 41. As the drum part 41, for example, a sieve is used. The drum portion 41 has a net (filter, screen), fibers or particles smaller than the mesh size of the mesh (one passing through the mesh, the first selection), and fibers larger than the mesh size of the mesh. Undefibrated pieces and lumps (those that do not pass through the net, second sort) can be separated. For example, the first selection is transferred to the mixing unit 50 via the pipe 7. The second selected item is returned to the defibrating unit 20 from the discharge port 44 through the pipe 8. Specifically, the drum part 41 is a cylindrical sieve that is rotationally driven by a motor. As the net of the drum portion 41, for example, a metal net, an expanded metal obtained by extending a cut metal plate, or a punching metal in which a hole is formed in the metal plate by a press machine or the like is used.

The first web forming unit 45 conveys the first sorted product that has passed through the sorting unit 40 to the mixing unit 50. The first web forming unit 45 includes a mesh belt 46, a stretching roller 47, and a suction unit (suction mechanism) 48.

The suction unit 48 can suck the first sorted matter dispersed in the air through the opening (opening of the mesh) of the sorting unit 40 onto the mesh belt 46. The first selection is deposited on the moving mesh belt 46 to form the web V. The basic configurations of the mesh belt 46, the tension roller 47, and the suction unit 48 are the mesh belt 72 of the second web forming unit 70 described later,
This is the same as the tension roller 74 and the suction mechanism 76.

The web V is formed in a soft and swelled state containing a lot of air by passing through the sorting unit 40 and the first web forming unit 45. The web V deposited on the mesh belt 46 is
It is put into the tube 7 and conveyed to the mixing unit 50.

The rotating body 49 can cut the web V before the web V is conveyed to the mixing unit 50. In the illustrated example, the rotating body 49 includes a base 49a and a protrusion 4 protruding from the base 49a.
9b. The protrusion 49b has, for example, a plate shape. In the illustrated example, four protrusions 49b are provided, and four protrusions 49b are provided at equal intervals. When the base 49a rotates in the direction R, the protrusion 49b can rotate around the base 49a. By cutting the web V by the rotating body 49, for example, the fluctuation in the amount of defibrated material per unit time supplied to the deposition unit 60 can be reduced.

The rotating body 49 is provided in the vicinity of the first web forming portion 45. In the illustrated example, the rotating body 49 is provided in the vicinity of the stretching roller 47a located on the downstream side in the path of the web V (next to the stretching roller 47a). The rotating body 49 is provided at a position where the protrusion 49b can come into contact with the web V and not in contact with the mesh belt 46 on which the web V is deposited. Thereby, it is possible to suppress the mesh belt 46 from being worn (damaged) by the protrusion 49b. The shortest distance between the protrusion 49b and the mesh belt 46 is, for example, not less than 0.05 mm and not more than 0.5 mm.

The mixing unit 50 mixes the first sorted product that has passed through the sorting unit 40 (the first sorted product conveyed by the first web forming unit 45) and the additive containing resin. The mixing unit 50 includes an additive supply unit 52 that supplies the additive, a pipe 54 that conveys the first selected product and the additive, and a blower 56. In the illustrated example, the additive is supplied from the additive supply part 52 through the hopper 9 to the pipe 54.
To be supplied. The tube 54 is continuous with the tube 7.

In the mixing unit 50, an air flow is generated by the blower 56, and the first selection product and the additive can be mixed and conveyed in the pipe 54. In addition, the mechanism which mixes a 1st selection material and an additive is not specifically limited, It may stir with the blade | wing which rotates at high speed, and uses rotation of a container like a V-type mixer. There may be.

As the additive supply unit 52, a screw feeder as shown in FIG. 1 or a disk feeder (not shown) is used. The additive supplied from the additive supply unit 52 includes a resin for binding a plurality of fibers. At the time when the resin is supplied, the plurality of fibers are not bound. The resin melts when passing through the sheet forming portion 80 and binds a plurality of fibers.

The resin supplied from the additive supply unit 52 is a thermoplastic resin or a thermosetting resin. For example, AS resin, ABS resin, polypropylene, polyethylene, polyvinyl chloride, polystyrene, acrylic resin, polyester resin, polyethylene terephthalate, Polyphenylene ether, polybutylene terephthalate, nylon, polyamide, polycarbonate, polyacetal, polyphenylene sulfide, polyether ether ketone, and the like.
These resins may be used alone or in combination. The additive supplied from the additive supply unit 52 may be fibrous or powdery.

In addition to the resin that binds the fibers, the additive supplied from the additive supply unit 52 prevents coloring of the fibers and the aggregation of the fibers depending on the type of sheet to be produced. An anti-agglomeration material inhibitor for the purpose of the treatment may contain a flame retardant for making the fibers difficult to burn.
The mixture (mixture of the first selection product and the additive) that has passed through the mixing unit 50 is transferred to the deposition unit 60 via the pipe 54.

The depositing unit 60 introduces the mixture that has passed through the mixing unit 50 from the introduction port 62, loosens the entangled defibrated material (fibers), and lowers it while dispersing it in the air. Furthermore, when the additive resin supplied from the additive supply unit 52 is fibrous, the deposition unit 60 loosens the entangled resin. Thereby, the deposition unit 60 can deposit the mixture on the second web forming unit 70 with good uniformity.

The deposition unit 60 includes a drum unit 61 and a housing unit 63 that accommodates the drum unit 61. As the drum part 61, a rotating cylindrical sieve is used. The drum part 61 has a net,
Fibers or particles (those that pass through the net) that are smaller than the mesh size included in the mixture that has passed through the mixing unit 50 are allowed to fall. The configuration of the drum unit 61 is the same as the configuration of the drum unit 41, for example.

In addition, the “sieving” of the drum unit 61 may not have a function of selecting a specific object. That is, the “sieving” used as the drum part 61 means a thing provided with a net, and the drum part 61 may drop all of the mixture introduced into the drum part 61.

The second web forming unit 70 deposits the passing material that has passed through the deposition unit 60 to form the web W. The second web forming unit 70 includes, for example, a mesh belt 72, a tension roller 74, and a suction mechanism 76.

While moving, the mesh belt 72 accumulates the passing material that has passed through the opening of the accumulation unit 60 (the opening of the mesh). The mesh belt 72 is stretched by a stretching roller 74, and is configured to allow air to pass therethrough. The mesh belt 72 moves as the stretching roller 74 rotates. While the mesh belt 72 continuously moves, the passing material that has passed through the accumulation portion 60 is continuously piled up, whereby the web W is formed on the mesh belt 72. The mesh belt 72 is made of, for example, metal, resin, cloth, or non-woven fabric.

The suction mechanism 76 is provided below the mesh belt 72 (on the side opposite to the accumulation unit 60 side). The suction mechanism 76 has a downwardly directed airflow (from the accumulation portion 60 to the mesh belt 7).
2) can be generated. By the suction mechanism 76, the mixture dispersed in the air by the deposition unit 60 can be sucked onto the mesh belt 72. Thereby, the discharge speed from the deposition part 60 can be increased. Furthermore, the suction mechanism 7
6 makes it possible to form a downflow in the dropping path of the mixture, and to prevent the defibrated material and additives from being entangled during the dropping.

As described above, the web W in a state where it contains a lot of air and is softly swollen is formed by passing through the deposition unit 60 and the second web forming unit 70 (web forming step). The web W deposited on the mesh belt 72 is conveyed to the sheet forming unit 80.

In the illustrated example, a humidity control unit 78 that adjusts the humidity of the web W is provided. The humidity control unit 78 can adjust the amount ratio of the web W and water by adding water or water vapor to the web W.

The sheet forming unit 80 pressurizes and heats the web W deposited on the mesh belt 72 to generate the sheet S.
Is molded. In the sheet forming unit 80, by heating the mixture of the defibrated material and the additive mixed in the web W, the plurality of fibers in the mixture are bound to each other via the additive (resin). Can do.

The sheet forming unit 80 includes a pressurizing unit 82 that pressurizes the web W, and a heating unit 84 that heats the web W pressed by the pressurizing unit 82. The pressurizing unit 82 includes a pair of calendar rollers 85 and applies pressure to the web W. The web W is pressed to reduce its thickness, and the density of the web W is increased. As the heating unit 84, for example,
Heating roller (heater roller), heat press molding machine, hot plate, hot air blower,
Use an infrared heater or flash fuser. In the illustrated example, the heating unit 84 includes a pair of heating rollers 86. By configuring the heating unit 84 as the heating roller 86, the web W can be compared with the case where the heating unit 84 is configured as a plate-like pressing device (flat plate pressing device).
The sheet S can be formed while continuously conveying the sheet. Here, the calendar roller 85 (pressure unit 82) can apply a pressure higher than the pressure applied to the web W by the heating roller 86 (heating unit 84). Calendar roller 85
The number of heating rollers 86 is not particularly limited.

The cutting unit 90 cuts the sheet S formed by the sheet forming unit 80. In the illustrated example, the cutting unit 90 includes a first cutting unit 92 that cuts the sheet S in a direction that intersects the conveyance direction of the sheet S, and a second cutting unit 94 that cuts the sheet S in a direction parallel to the conveyance direction. ,have.
The second cutting unit 94 cuts the sheet S that has passed through the first cutting unit 92, for example.

Thus, a single-sheet sheet S having a predetermined size is formed. Cut sheet S
Is discharged to the discharge unit 96.

The sheet manufacturing apparatus 100 includes a control unit 104 including a CPU and a storage unit (ROM, RAM). The control unit 104 controls the rotation of the heating roller 86 by outputting a control signal to a driving unit (motor) that rotationally drives the heating roller 86 (first rotating body, second rotating body). In addition, the control unit 104 outputs a control signal to a motor of a displacement mechanism for displacing the heating roller 86 and performs control to displace the heating roller 86.

2. Configuration of Heating Unit The sheet manufacturing apparatus 100 according to the present embodiment forms the sheet S by heating and pressurizing the web W (the deposit formed by the stacking unit 60) in the above-described sheet forming unit 80 (heating unit 84). . In the example of FIG. 1, the heating unit 84 is simply depicted as a pair of heating rollers 86.
Hereinafter, the heating unit 84 of the sheet manufacturing apparatus 100 of the present embodiment will be described in detail.

2 and 3 are diagrams schematically illustrating an example of the heating unit 84 of the present embodiment. The heating unit 84 includes a rotatable first rotating body 181, a rotatable second rotating body 182, and a heating body 183. Each of the first rotating body 181 and the second rotating body 182 has a roller shape having an outer peripheral surface that moves with rotation. The web W is sandwiched between the first rotating body 181 and the second rotating body 182 and heated. The sheet S is configured to be pressed. Moreover, the heating body 183 is the second
It arrange | positions so that the outer peripheral surface of the rotary body 182 can be heated. First rotating body 181 and heating body 183
Each is a heating roller having a heat source H (for example, a halogen heater) inside. Instead of heating the second rotating body 182 with the heating body 183, the second rotating body 182 may be heated with a non-contact heater (for example, an infrared heater or a carbon heater). The heating unit 84 includes a heating control unit (not shown) that controls the heat source H, and the first rotating body 181.
And a temperature detector (not shown) for detecting the temperature of the second rotating body 182. In addition, you may comprise so that the control part 104 may be provided with at least one part of the function of a heating control part and a temperature detection part.

The second rotating body 182 includes a cored bar 184 at the center of rotation and a soft body 185 disposed so as to surround the periphery thereof. The cored bar 184 is made of a metal such as aluminum, iron or stainless steel, and the soft body 185 is made of a rubber such as silicon rubber or urethane rubber. The first rotating body 181 and the heating body 183 are formed of a metal hollow cored bar 187, and a release layer 188 with a fluorine coating is provided on the surface thereof.

The heating unit 84 of the present embodiment includes a first position (see FIG. 2) for the first rotating body 181 and the second rotating body 182 to sandwich and pressurize the web W, and the first rotating body 181 and the second rotating body 181. The rotating body 182 is configured to be displaceable to a second position (see FIG. 3) that is separated from each other. The sheet manufacturing apparatus 100 of this embodiment includes a displacement mechanism for displacing the position of the heating unit 84. The displacement mechanism may displace either one of the first rotator 181 and the second rotator 182 or may displace both the first rotator 181 and the second rotator 182. As shown in FIGS. 2 and 3, by providing a support 186 (guide) for supporting the web W in the vicinity of the first rotator 181 and the second rotator 182, the first rotator 181 at the second position. And the second rotating body 182 is the web W
You may make it not touch. The support portion 186 includes a first rotating body 181 and a second rotating body 182.
The web W is provided at each of a position upstream of the web W in the conveyance direction and a position downstream of the conveyance direction.

FIG. 4 is a diagram schematically illustrating an example of the displacement mechanism of the present embodiment. The displacement mechanism 190 includes a first bearing portion 193 that rotatably supports the rotating shaft 191 of the first rotating body 181, and the second rotating body 1.
A second bearing portion 194 that rotatably supports the rotary shaft 192 of 82, a first rod 195a,
And a second rod 195b. The first bearing portion 193 and the second bearing portion 194 have a rotating shaft 19
6 are connected to each other so as to be rotatable about six. One end side of the first rod 195a is a rotating shaft 197.
The second bearing portion 194 is provided on the second bearing portion 194 so as to be rotatable around a, and the one end side of the second rod 195b is provided on the first bearing portion 193 so as to be rotatable around the rotation shaft 197b. The first rod 195a is provided with a biasing member 198 (spring). One end side of the biasing member 198 is connected to the rotating shaft 197a, and the other end side of the biasing member 198 is connected to the other end side 199 of the second rod 195b. The displacement mechanism 190 has a drive unit (not shown) that drives the second rod 195b to rotate around the rotation shaft 197b.

4A shows a state when the heating unit 84 is in the second position, and FIG. 4B shows a state when the heating unit 84 is in the first position. When the second rod 195b is rotated clockwise in the state shown in FIG. 4A (second position), as shown in FIG. 4B, the first rotating body 181 and the second rotating body 182 are mutually connected. It is displaced to the first position where it comes into contact. At this time, the first bearing portion 193 (first rotating body 181) is biased toward the second bearing portion 194 (second rotating body 182) by the biasing member 198, and the second bearing portion 194 is the first bearing portion. It is energized to the 193 side. In the state (first position) shown in FIG. 4B, when the second rod 195b is rotated counterclockwise, the first rotating body 181 and the second rotating body 182 are displaced to the second position where they are separated from each other. To do.

The heating unit 84 of the present embodiment has the first rotating body 181 and the second rotating body 182 at the second position.
Are configured to be rotationally driven. The sheet manufacturing apparatus 100 of the present embodiment is a first
A driving unit that rotationally drives the rotating body 181 and a driving force generated by the driving unit at the second position without being transmitted to the second rotating body 182 at the first position. A transmission mechanism for transmitting.

FIG. 5 is a diagram schematically illustrating an example of the transmission mechanism of the present embodiment. The transmission mechanism 200 includes a drive gear 202, a main gear 203, a first gear 204, a second gear 205, and a third gear.
A gear 206 and a fourth gear 207 are provided. A drive gear 202 is connected to a rotation shaft of the drive unit 201 (a drive unit that rotates the first rotating body 181). A main gear 203 is engaged with the drive gear 202, and the rotation shaft 19 of the first rotating body 181 is engaged with the main gear 203.
1 is connected. The first gear 204 is engaged with the main gear 203, and the second gear 205 is engaged with the first gear 204. A third gear 206 is connected to the rotation shaft of the second gear 205 via a one-way clutch (not shown). A fourth gear 207 is engaged with the third gear 206, and a rotation shaft 192 of the second rotating body 182 is connected to the fourth gear 207.

When the second rotating body 182 is not in contact with the first rotating body 181 (in the second position), the second rotating body 182 is rotationally driven by the driving force transmitted by the transmission mechanism 200. Here, the transmission mechanism 200 is configured such that the peripheral speed of the first rotating body 181 and the peripheral speed of the second rotating body 182 are different, and in the second position, the second rotating body 182 is the first rotating body. It rotates at a peripheral speed slower than the peripheral speed of 181. Here, the peripheral speed of the second rotating body 182 is set to the first rotating body 1.
It is about 10% slower than the peripheral speed of 81.

When the second rotating body 182 contacts the first rotating body 181 (the first rotating body 181 and the second rotating body 1
One-way gear because the peripheral speed of the second rotating body 182 rotating with the driving force transmitted by the transmission mechanism 200 is slower than the peripheral speed of the first rotating body 181 when the web 82 is displaced to the first position sandwiching the web W). The third gear 206 is idle, and the second rotating body 182 is rotationally driven by friction with the outer peripheral surface of the first rotating body 181 (the surface of the web W sandwiched). That is, in the first position, the driving force by the driving unit 201 is not transmitted to the second rotating body 182, and the second rotating body 182 is not transmitted.
Follows the first rotating body 181. Note that the peripheral speed of the second rotating body 182 is slower than the peripheral speed of the first rotating body 181 in consideration of an increase in the peripheral speed of the second rotating body 182 composed of the soft body 185 due to thermal expansion. The transmission mechanism 200 is configured as described above.

FIG. 6 is a flowchart illustrating an example of processing of the control unit 104. First, the control unit 104
Determines whether to start the conveyance of the web W (step S10). At this time, the heating unit 84 is in a second position where the first rotating body 181 and the second rotating body 182 are separated from each other. When it is determined in step S10 that the conveyance of the web W is started (for example, when the user performs an operation for starting production of the sheet), the control unit 104 transmits a control signal to the drive unit 201 to Control for starting the rotational drive of the first rotator 181 and the second rotator 182 is performed (step S12). Next, the control part 104 transmits a control signal to a heating control part, and performs control which starts the heating of the 1st rotary body 181 and the 2nd rotary body 182 (step S14).

Next, the control unit 104 acquires the temperature of the heating unit 84 (the temperature of the first rotating body 181 and the second rotating body 182) from the temperature detection unit (step S16), and the acquired temperature has reached a predetermined temperature. Whether or not (step S18). Here, “the temperature of the heating unit 84 has reached a predetermined temperature” means that the temperature of the first rotating body 181 has reached the predetermined first temperature and the temperature of the second rotating body 182 has reached the predetermined second temperature. It means that it has been reached. The first temperature and the second temperature may be the same temperature or different temperatures. When the temperature of the heating unit 84 has not reached the predetermined temperature (N in Step S18), the process proceeds to Step S16, and when the temperature of the heating unit 84 has reached the predetermined temperature (Step S).
18), the control unit 104 transmits a control signal to the drive unit of the displacement mechanism 190, and the first rotation body 181 and the second rotation body 182 hold the web W between the first rotation body 181 and the first rotation body 182. Control to shift the position is performed (step S20). At this time, the first rotator 181 and the second rotator 182 may be displaced to the first position while rotating, or the first rotator 181 and the second rotator 182 are stopped from rotating for the first time. After the displacement to the position and the displacement to the first position, the rotation of the first rotating body 181 and the second rotating body 182 may be resumed. Almost simultaneously with step S20, the conveyance of the web W is started (step S22). For example, mesh belt 72 (stretching roller 74)
Then, the pressure unit 82 (calendar roller 85), the heating unit 84 (first rotating body 181 and second rotating body 182), etc. are driven to start the conveyance of the web W. Note that the control unit 104 controls the heating control unit so that the temperature of the heating unit 84 maintains a predetermined temperature.

Next, the control unit 104 determines whether or not to stop the conveyance of the web W (step S24).
). When it is determined in step S24 that the conveyance of the web W is to be stopped (for example, when the user performs an operation for stopping the production of the sheet), the control unit 104 transmits a control signal to the heating control unit, Control to stop the heating of the first rotator 181 and the second rotator 182 is performed (step S26), a control signal is transmitted to the drive unit 201, and the rotation of the first rotator 181 and the second rotator 182 is stopped. Control is performed (step S28). Almost simultaneously with step S28, the conveyance of the web W is stopped (step S30). For example, mesh belt 72 (stretching roller 74), pressurizing unit 82 (calendar roller 85), heating unit 84 (first rotating body 1).
81 and the second rotating body 182) and the like are stopped to stop the conveyance of the web W. Next, the control part 104 transmits a control signal to the drive part of the displacement mechanism 190, and performs control which displaces the heating part 84 to a 2nd position (step S32). In addition, said process sequence is an example and may be changed suitably. For example, the process of step S14 may be performed before the process of step S12, or these processes may be performed simultaneously. In addition, step S26 is performed before step S26.
28 processes may be performed, or these processes may be performed simultaneously.

Thus, in the sheet manufacturing apparatus 100 of the present embodiment, when the conveyance of the web W is started, the heating unit 84 is heated at the second position where the first rotating body 181 and the second rotating body 182 are separated from each other, After the temperature of the heating unit 84 reaches a predetermined temperature, the heating unit 84 is displaced to the first position (the web W is sandwiched and heated by the first rotating body 181 and the second rotating body 182), thereby being conveyed. It is possible to prevent the sheet strength from partially decreasing due to insufficient heating at the start, and to make the sheet strength uniform.

In the sheet manufacturing apparatus 100 of the present embodiment, the first rotating body 181 and the second rotating body 1 are heated by rotating the first rotating body 181 and the second rotating body 182 at the second position.
The surface temperature of 82 can be made uniform over the circumferential direction. If the second rotating body 182 is heated in a stopped state, only the contact portion with the heating body 183 is heated, so that the surface temperature of the second rotating body 182 cannot be made uniform in the circumferential direction. Also, tentatively
If the rotating body 181 is heated in a stopped state, heat from the heat source H is transmitted non-uniformly due to the influence of convection or the like, and therefore the surface temperature of the first rotating body 181 cannot be made uniform in the circumferential direction.

Moreover, in the sheet manufacturing apparatus 100 of this embodiment, when stopping the conveyance of the deposit, the web W is moved to the first rotating body 1 when the conveyance is stopped by displacing the heating unit 84 from the first position to the second position.
81 and the second rotating body 182 continue to be sandwiched (overheating when transport is stopped).
Can be prevented from being discolored. Furthermore, by preventing the first rotating body 181 and the second rotating body 182 from contacting the web W at the second position by the support portion 186 or the like,
Discoloration of the web W can be reliably prevented.

Further, in the sheet manufacturing apparatus 100 of the present embodiment, the transmission mechanism 200 is configured not to transmit the driving force of the driving unit 201 to the second rotating body 182 at the first position, so that the second rotating body at the first position. Since the 182 can be driven by the first rotating body 181, the web W can be stably conveyed by the first rotating body 181 and the second rotating body 182. First, first
When configured to transmit the driving force of the driving unit 201 to the second rotating body 182 even at the position,
The web W can be stably conveyed by the difference in peripheral speed between the first rotating body 181 and the second rotating body 182 (speed difference caused by thermal expansion of the second rotating body 182 and speed difference caused by component tolerance). Can not. If only one of the first rotating body 181 and the second rotating body 182 is rotated and displaced to the first position, the first rotating body 181 and the second rotating body 182 move the web W. When pinching, an impact is applied to the web W and the quality of the sheet is deteriorated.

In the present invention, a part of the configuration may be omitted within a range having the characteristics and effects described in the present application, or each embodiment or modification may be combined. Note that the manufacturing unit 102 may omit a part of the configuration, add another configuration, or replace it with a known configuration as long as the sheet can be manufactured.

The present invention includes configurations that are substantially the same as the configurations described in the embodiments (for example, configurations that have the same functions, methods, and results, or configurations that have the same objects and effects). 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.

For example, in the above embodiment, the case where the shape of the first rotating body 181 and the second rotating body 182 is a roller shape has been described, but at least one of the first rotating body 181 and the second rotating body 182 may be a belt shape. Good. In the example shown in FIG. 7, the first rotating body 181 is a roller 1.
The second rotating body 182 has a belt that is stretched around the belt 89 and rotated by the roller.
Is a heating roller having a heat source H inside. In the example shown in FIG. 7, the belt of the first rotating body 181 is heated by a heating body 183 that is a non-contact heater.

1 hopper, 2, 3, 7, 8 pipe, 9 hopper, 10 supply section, 12 crushing section, 14
Crushing blade, 20 defibrating part, 22 inlet, 24 outlet, 40 sorting part, 41 drum part, 42 inlet, 43 housing part, 44 outlet, 45 first web forming part, 46
Mesh belt, 47 Tension roller, 48 Suction part, 49 Rotating body, 49a Base part, 4
9b Projection part, 50 mixing part, 52 additive supply part, 54 pipe, 56 blower, 60 deposition part, 61 drum part, 62 inlet, 63 housing part, 70 second web forming part,
72 mesh belt, 74 tension roller, 76 suction mechanism, 78 humidity control section, 8
0 sheet forming section, 82 pressurizing section, 84 heating section, 85 calendar roller, 86 heating roller, 90 cutting section, 92 first cutting section, 94 second cutting section, 96 discharge section, 10
0 sheet manufacturing apparatus, 102 manufacturing unit, 104 control unit, 181 first rotating body, 182
Second rotating body, 183 heating body, 184 cored bar, 185 soft body, 186 support, 187
Core metal, 188 release layer, 189 roller, 190 displacement mechanism, 191 rotation axis, 19
2 Rotating shaft, 193 First bearing portion, 194 Second bearing portion, 195a First rod, 195
b Second rod, 196, 197a, 197b Rotating shaft, 198 urging member, 199 other end side, 200 transmission mechanism, 201 drive unit, 202 drive gear, 203 main gear, 204 first gear, 205 second gear, 206 3rd gear, 207 4th gear, R direction, S seat, V web, W web

Claims (8)

A sheet manufacturing apparatus for manufacturing a sheet using a raw material containing fibers,
A depositing portion for depositing a material containing fibers and resin;
A heating unit for heating the deposit deposited by the deposition unit, the heating unit including a first rotating body and a second rotating body;
The first rotating body and the second rotating body sandwich the deposits and heat the first position, and the first rotating body and the second rotating body are separated from each other at the second position. A displacement mechanism for displacing the part;
A sheet manufacturing apparatus comprising: a control unit that heats the first rotating body and the second rotating body at the second position and then displaces the first rotating body to the first position. A sheet manufacturing apparatus for manufacturing a sheet using a raw material containing fibers,
A depositing portion for depositing a material containing fibers and resin;
A heating unit for heating the deposit deposited by the deposition unit, the heating unit including a first rotating body and a second rotating body;
The first rotating body and the second rotating body sandwich the deposits and heat the first position, and the first rotating body and the second rotating body are separated from each other at the second position. A displacement mechanism for displacing the part,
The sheet manufacturing apparatus, wherein the heating unit is configured such that the first rotating body and the second rotating body can be driven to rotate at the second position. When starting the conveyance of a deposit, it has a control part which displaces the heating part from the 2nd position to the 1st position after the temperature of the heating part reaches predetermined temperature. Item 3. The sheet manufacturing apparatus according to Item 1 or 2. The sheet manufacturing according to any one of claims 1 to 3, further comprising a control unit that displaces the heating unit from the first position to the second position when the conveyance of the deposit is stopped. apparatus. The peripheral speed of the first rotating body is different from the peripheral speed of the second rotating body when the heating unit is in the second position, according to any one of claims 1 to 4. The sheet manufacturing apparatus described. A drive unit that rotationally drives the first rotating body;
Without transmitting the driving force by the driving unit to the second rotating body in the first position,
6. The sheet manufacturing apparatus according to claim 1, further comprising a transmission mechanism configured to transmit a driving force by the driving unit to the second rotating body at the second position. . The sheet manufacturing apparatus according to claim 1, wherein the first rotating body and the second rotating body do not contact the deposit in the second position. A sheet manufacturing method for manufacturing a sheet using a raw material containing fibers,
Depositing a material comprising fiber and resin;
Heating the deposited deposit using a heating unit including the first rotating body and the second rotating body;
Including
When transporting the deposit, after the temperature of the heating unit reaches a predetermined temperature, the heating unit is moved from the position where the first rotating body and the second rotating body are separated from each other to the first rotation. A sheet manufacturing method, wherein the body and the second rotating body are displaced to a position for sandwiching and heating the deposit.

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