TW201932264A - Fiber processing device, fibrous feedstock recycling device, and control method of a fiber processing device - Google Patents

Abstract

Variation in the amount of material that is dispersed when material containing fiber is discharged by a sieve is suppressed. A fiber processing device has a drum (41) that screens defibrated material (MB) containing fiber, a mesh belt (46) that accumulates first screened material (MC) discharged from the drum (41), and a processor (102, 80, 90) that processes the first screened material (MC) accumulated on the mesh belt (46). The drum (41) operates at a first speed during processing by the processor; and when the drum (41) starts from a stationary stop, a startup operation including a state in which the drum (41) operates at a slower speed than the first speed executes for a specific time.

Description

Fiber processing device, fiber raw material regeneration device, and control method of fiber processing device

The present invention relates to a fiber processing device, a fiber raw material regeneration device, and a control method for a fiber processing device.

Conventionally, in a device for regenerating a fiber-containing raw material, a device having a step of stacking fibers into a net shape is known (for example, refer to Patent Document 1). In Patent Document 1, the material is dispersed in the air from the opening of the sieve, and the material is deposited on a mesh belt to form a mesh. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2017-154341

[Problems to be solved by the invention]

In the structure described in Patent Document 1, the material is dispersed by a sieve having an opening. In such a configuration, depending on the state of the dispersed materials or the device, the amount of the material passing through the opening may vary greatly with the operation of the sieve. This invention is made in view of the said situation, The objective is to suppress the change of the quantity of the dispersed material when the fiber containing material is disperse | distributed by a sieve. [Technical means to solve the problem]

In order to solve the above problems, the fiber processing apparatus of the present invention includes: a sieve section that screens materials containing fibers; a stacking section that accumulates the material discharged from the sieve section; and a processing section that stacks the materials stacked on the stacking section. The above materials are processed; and during the processing of the processing section, the sieve section is operated at the first speed. When the sieve section is started from a stopped state, it is executed after the sieve section is started for a specific period of time The start operation including the state where the sieve portion operates at a lower speed than the first speed is included. According to the present invention, when the sieve portion whose amount of material moves from the sieve portion to the stacking portion is easily activated, by appropriately adjusting the operation speed of the sieve portion, the variation of the amount of material can be suppressed.

In addition, the present invention may be configured to maintain the state in which the sieve portion is operated at a lower speed than the first speed during the start-up operation for a specific time.

In addition, the present invention may be configured such that, in the starting operation, the sieve portion is operated such that the operating speed of the sieve portion is maintained at a second speed lower than the first speed for a specific time.

In addition, the present invention may have a configuration in which the operating speed of the sieve portion is changed in the starting operation so that the operating speed of the sieve portion is kept lower than the first speed for a specific time.

In addition, the present invention may be configured as follows: The starting operation includes a first operation of increasing the speed of the sieve portion with time and increasing the speed per unit time; The increase in speed per unit time is smaller than the second operation of the first operation.

In addition, the present invention may have a configuration in which the sieve portion is activated from a stopped state in a state where the material is present in the sieve portion.

In addition, the present invention may be configured to include a control unit that controls the operation of the sieve unit. The control unit activates the driving unit based on the first speed during the processing of the processing unit. After the sieve unit starts, Based on the set speed lower than the first speed, the sieve portion is operated for a specific time.

In addition, the present invention may be configured to include a humidity detection unit, and the control unit controls the set speed based on the humidity information detected by the humidity detection unit.

In addition, the present invention may have a configuration in which the sieve portion has a cylindrical shape, an opening is provided on a peripheral surface of the sieve portion, and rotation is performed around an axis of the cylinder.

In order to solve the above-mentioned problems, the fiber raw material regeneration device of the present invention includes a miniaturizing section that miniaturizes the fiber-containing raw material; a sieve section that screens the fines that have been miniaturized by the miniaturizing section; a stacking section; To accumulate the fines discharged from the sieve; and a processing unit to process the fines deposited on the sieving unit; and while the processing of the processing unit is being executed, the sieve is operated at a first speed When the sieve part is activated from a stopped state in a state where the fine material exists in the sieve part, after the sieve part is activated, the sieve part is executed at a specific time period more than the first speed. Start operation at low speed. According to the present invention, when the sieve portion whose amount of material moved from the sieve portion to the stacking portion is easily changed is activated, by appropriately adjusting the operation speed of the sieve portion, it is possible to suppress the variation of the amount of material.

In order to solve the above-mentioned problems, the method for controlling a fiber processing apparatus of the present invention includes a sieving section that screens a material containing fibers, a sieving section that accumulates the material discharged from the sieving section, and The processing section for processing the material, and the fiber processing device of the driving section that moves the sieve section to discharge the material from the sieve section, during the processing of the processing section, the sieve section operates at the first speed. In the case where the sieve part is started from a stopped state, after the sieve part is started, the sieve part performs a start operation including a state of operating at a lower speed than the first speed for a specific period of time. According to the present invention, when the sieve portion whose amount of material moved from the sieve portion to the stacking portion is easily changed is activated, by appropriately adjusting the operation speed of the sieve portion, it is possible to suppress the variation of the amount of material.

Hereinafter, preferred embodiments of the present invention will be described in detail using drawings. The embodiment described below does not limit the content of the invention described in the scope of the patent application. It should be noted that all the constitutions described below are not essential constitutional elements of the present invention.

[1. First Embodiment] [1-1. Overall Configuration of Sheet Manufacturing Apparatus] FIG. 1 is a schematic diagram showing a configuration of a sheet manufacturing apparatus 100. The sheet manufacturing apparatus 100 fiberizes a raw material MA containing fibers, and performs a regeneration process for regenerating a new sheet S. The sheet manufacturing apparatus 100 can manufacture a plurality of sheets S, and can also add functions such as the modulation of the bonding strength or whiteness of the sheet S, or the functions of color, fragrance, and flame retardance, by mixing additives to the raw material MA to match the application. . The sheet manufacturing apparatus 100 can adjust the density, thickness, size, and shape of the sheet S. As a representative example of the sheet S, in addition to sheet-like products such as cleaning sheets such as A4 or A3 standard-sized printing paper, floor cleaning sheets, oil stain sheets, toilet cleaning sheets, etc., Plate shape etc. The sheet manufacturing apparatus 100 corresponds to the fiber raw material regeneration apparatus and fiber processing apparatus of this invention.

The sheet manufacturing apparatus 100 includes a supply section 10, a coarse crushing section 12, a defibrating section 20, a screening section 40, a first mesh forming section 45, a rotating body 49, a mixing section 50, a stacking section 60, and a second mesh forming section. 70. A conveying section 79, a forming section 80, and a cutting section 90. The coarse crushing section 12, the defibrating section 20, the screening section 40, and the first mesh forming section 45 constitute a defibrating processing section 101 which is a material obtained by miniaturizing the raw material MA to obtain a sheet S. In addition, the rotating body 49, the mixing section 50, the stacking section 60, the second mesh forming section 70, the forming section 80, and the cutting section 90 are configured to process the material obtained in the defibrating processing section 101 to manufacture the sheet S. Manufacturing department 102.

The supply unit 10 is an automatic feeding device that stores the raw material MA and continuously feeds the raw material MA to the coarse crushing unit 12. The raw material MA is only required to contain fibers, and examples thereof include recycled paper, waste paper, and pulp sheets. The coarse crushing portion 12 includes a coarse crushing blade 14 that cuts the raw material MA supplied from the supply unit 10, and the raw material MA is cut in the air by the coarse crushing blade 14 to form fine pieces of several cm square. The shape and size of the thin pieces are arbitrary. As the coarse crushing part 12, a paper shredder can be used, for example. The raw material MA cut from the coarse crushing section 12 is collected by the hopper 9, and is conveyed to the defibrating section 20 through the pipe 2.

The defibrating section 20 defibrates the coarse pieces cut by the coarse crushing section 12. The so-called defibrating means the process of disassembling the raw material MA with a plurality of fibers into one or a few fibers. The raw material MA may also be referred to as a defibrated substance. By defibrating the raw material MA by the defibrating section 20, the effect of separating the resin particles, ink, color enhancer, and anti-seepage agent adhering to the raw material MA from the fibers can also be expected. The person passing through the defibrating section 20 is referred to as a defibrated material. In addition to the disintegrated defibrillated fibers, the defibrillated fibers may also include additives such as resin particles, inks, and colorants that are separated from the fibers when the fibers are disassembled, as well as anti-seepage materials and paper strength enhancers. The resin particles contained in the defibrated material are resins which are used to bind and mix a plurality of fibers with each other when the raw material MA is produced. The shape of the fibers contained in the defibrated material is string-like or ribbon-like. The fibers contained in the defibrated material may not be entangled with other fibers, but exist in an independent state. Alternatively, it can also be entangled with other disassembled defibrillated matter to form a so-called "lump". The defibrated portion 20 corresponds to a miniaturized portion. The fibrillated matter MB described later corresponds to a fine substance.

The defibrating section 20 defibrates in a dry manner. The dry method refers to defibration and other treatments not in a liquid but in a gas such as the atmosphere (in the air). The defibrating unit 20 can be configured using a defibrating machine such as an impeller pulverizer. Specifically, the defibrating unit 20 includes a rotating rotor (not shown) and a pad (not shown) located on the outer periphery of the rotor (not shown), and the coarse pieces are sandwiched between the rotor and the pad to perform decomposing. Fiber.

The coarse chips are conveyed from the coarse crushing section 12 to the defibrating section 20 by an air flow. The airflow may be generated by the defibrating part 20, and a blower (not shown) may be provided on the upstream or downstream side of the defibrating part 20 in the conveying direction of the coarse chips or the defibrated material to generate the airflow. Further, the defibrated material is transferred from the defibrated portion 20 to the screening portion 40 through the tube 3 by the air flow. The airflow that transports the defibrated material to the screening section 40 may be generated by the defibration section 20, and the airflow of the above-mentioned blower may also be used.

The sieving section 40 screens the components contained in the defibrated fiber after being defibrated by the defibrating section 20 according to the size of the fiber. The size of the fiber mainly refers to the length of the fiber. The screening section 40 includes an introduction port 42 for introducing a defibrated material into the tube section 41 and a discharge port 44 for discharging a second screening object described later from the tube section 41. The discharge port 44 is connected to the defibrating part 20 through the tube 8, and the screening part 40 returns the second screening material to the defibrating part 20 through the tube 8. The first mesh forming unit 45 forms the first mesh W1 by forming the material separated by the screening unit 40 into a mesh shape.

FIG. 2 is a diagram showing a schematic configuration of the screening section 40 and the first mesh forming section 45, and is a side view of the main sections. As shown in FIGS. 1 and 2, the screening unit 40 includes a cylindrical portion 41 and a housing portion 43 that accommodates the cylindrical portion 41.

The tube portion 41 is configured using, for example, a sieve. Specifically, the tube portion 41 includes a mesh, a filter, a mesh screen, and the like having an opening and functioning as a sieve. Specifically, the cylindrical portion 41 has a cylindrical shape, and is rotated and driven around the axis of the cylinder by the first sieve motor 40a (driving portion, sieve driving portion). At least a part of the peripheral surface of the tube portion 41 is a net. The net of the tube portion 41 is constituted by a metal net extending a gold net, a metal plate having a score, a punched metal plate, and the like. In FIG. 2, the opening of the tube portion 41 is indicated by a symbol 41 a. The operating speed of the tube portion 41 by the power of the first sieve motor 40a is set to a speed VB. The speed VB may also be referred to as the rotation speed of the barrel portion 41. In addition, the rotation direction of the tube portion 41 is not limited to the direction shown in FIG. 2, and may be a reverse direction, and the first screen motor 40 a may be used to perform a reciprocating operation by switching the rotation direction. The speed VB is not limited to the speed in the direction shown by the arrow in FIG. 2, and it refers to the relative speed with respect to the barrel portion 41 in a stationary state. The tube portion 41 corresponds to the screen portion of the present invention. The fibrillated material MB introduced into the tube portion 41 and the first screening material MC selected through the opening 41a correspond to materials.

The first mesh forming portion 45 includes a mesh belt 46, a tension roller 47, and a suction portion 48. The mesh belt 46 is a ring-shaped metal belt and is stretched over a plurality of tension rollers 47. The mesh belt 46 surrounds a track constituted by the tension roller 47. A part of the track of the mesh belt 46 is flat below the tube portion 41, and the mesh belt 46 forms a flat surface.

One of the tension rollers 47 is a driving roller 47 a that drives the mesh belt 46. The driving roller 47a is driven to rotate by the first belt motor 47b, and drives the mesh belt 46 in a direction indicated by an arrow in the figure. The operation speed of the mesh belt 46 by the driving force of the first belt motor 47b is set to the speed VA. The speed VA may also be referred to as the conveying speed of the mesh belt 46.

For the first screen motor 40a and the first belt motor 47b, known motors such as a servo motor and a stepping motor can be used. Between the first sieve motor 40a and the cylindrical portion 41, other transmission mechanisms such as gears and connecting rods for transmitting power may be provided. The same applies to the drive motor 47a and the first belt motor 47b.

The fibrillated material MB introduced into the inside of the tube portion 41 from the introduction port 42 is divided into a passing material that passes through the opening 41 a of the tube portion 41 and a residue that does not pass through the opening 41 a by the rotation of the tube portion 41. The passage through the opening 41a contains fibers or particles smaller than the opening 41a, and this is set as the first screening object, which is represented by the symbol MC. The residue contains fibers, undefibrillated pieces, or agglomerates larger than the opening 41a, and is referred to as a second sieve. The first screening material MC is lowered toward the first mesh forming portion 45 inside the shell portion 43. As described above, the second screening object is transported from the discharge port 44 to the defibrating unit 20 through the tube 8. The screening unit 40 corresponds to a separation unit.

By the rotation of the tube portion 41, the first screening material MC passing through the opening 41 a descends toward the mesh belt 46 inside the shell portion 43. A plurality of openings are formed in the mesh belt 46. In the first screening object MC lowered from the barrel portion 41, components larger than the opening of the mesh belt 46 are accumulated on the mesh belt 46. In addition, in the first screening substance MC, components smaller than the opening of the mesh belt 46 pass through the opening. The component which passed through the opening of the mesh belt 46 was made into the 3rd screening object D. The third screening object D includes fibers shorter than the openings of the mesh belt 46 among the fibers contained in the defibrated material, or particles containing resin particles, ink, color enhancer, impermeable agent, etc. separated from the fibers by the defibrated portion 20 . The mesh belt 46 corresponds to the accumulation portion of the present invention.

The suction portion 48 can suck air from below the mesh belt 46. The suction unit 48 is connected to the first dust collection unit 27 via a pipe 23. The first dust collection unit 27 includes a filter that separates the third screening object from the air flow. Downstream of the first dust collection unit 27, a first collection blower 28 is provided. The first collection blower 28 sucks air from the first dust collection unit 27. With this configuration, the smaller third screening object D of the first screening object MC lowered to the mesh belt 46 is sucked by the suction force of the first trap blower 28, and is sucked by the first dust collecting section. 27 filter. The air passing through the filter of the first dust collecting portion 27 is exhausted through a pipe 29.

The air flow sucked by the suction portion 48 attracts the first screening material MC descending from the cylinder portion 41 toward the mesh belt 46, and thus has an effect of promoting accumulation. The first sieve MC deposited on the mesh belt 46 has a mesh shape, and constitutes a first mesh W1.

The first mesh sheet W1 is mainly composed of fibers larger than the opening of the mesh belt 46 among the components contained in the first screen, and is formed into a soft and expanded state containing a large amount of air. The first mesh W1 is transported to the rotating body 49 as the mesh belt 46 moves.

Returning to FIG. 1, the rotating body 49 includes a base portion 49 a connected to a driving portion (not shown) such as a motor, and a protrusion 49 b protruding from the base portion 49 a. The base portion 49 a rotates in the direction R, and the protrusion 49 b uses the base portion 49 a as Center while rotating. The protrusion 49b has a plate-like shape, for example. In the example of FIG. 1, four protrusions 49b are provided at regular intervals on the base portion 49a.

The rotating body 49 is located at the end of the flat portion in the track of the mesh belt 46. At this end, since the track of the mesh belt 46 is bent downward, the mesh belt 46 is bent downward and moved. Therefore, the first mesh W1 carried by the mesh belt 46 protrudes from the mesh belt 46 and comes into contact with the rotating body 49. The first mesh W1 is disassembled by collision of the protrusion 49b with the first mesh W1, and becomes a small fiber mass. This block is conveyed to the mixing section 50 through a tube 7 located below the rotating body 49. As described above, the first mesh W1 has a soft structure in which fibers are deposited on the mesh belt 46 and is easily broken when it collides with the rotating body 49.

The position of the rotating body 49 is a position where the protrusion 49b can contact the first mesh W1, and the protrusion 49b is provided at a position which does not contact the mesh belt 49. The distance between the protrusion 49b and the mesh belt 46 closest to each other is preferably set to, for example, 0.05 mm or more and 0.5 mm or less.

The mixing unit 50 mixes the first sieve and the additive. The mixing unit 50 includes an additive supply unit 52 that supplies additives, a pipe 54 that transports the first screening material and additives, and a mixing blower 56.

The additive supply unit 52 is provided with an additive cassette 52 a that stores additives. The additive cassette 52 a may be attachable to and detachable from the additive supply unit 52. The additive supply unit 52 includes an additive extraction unit 52b that extracts additives from the additive cassette 52a, and an additive input unit 52c that discharges the additives extracted by the additive extraction unit 52b to the pipe 54. The additive supply unit 52b includes a feeder that successively sends out the additives (not shown) containing the fine powder or fine particles inside the additive cassette 52a, and takes out the additives from a part or all of the additive cassette 52a. The additives taken out by the additive taking-out section 52b are sent to the additive taking-in section 52c. The additive input portion 52c stores the additive extracted by the additive extraction portion 52b. The additive input portion 52c includes a stopper (not shown) that can be opened and closed at a connection portion with the pipe 54 and opens the shutter to send the additive taken out by the additive extraction portion 52b to the pipe 54.

The additive supplied from the additive supply unit 52 includes a resin (bonding agent) for binding a plurality of fibers. The resin contained in the additive is melted when passing through the forming section 80, and a plurality of fibers are bound. The resin is a thermoplastic resin or a thermosetting resin, such as AS resin, ABS resin, polypropylene, polyethylene, polyvinyl chloride, polystyrene, acrylic resin, polyester fiber resin, polyethylene terephthalate, Polyphenylene ether, polybutylene terephthalate, nylon, polyamide, polycarbonate, polyacetal, polyphenylene sulfide, polyetheretherketone and the like. These resins may be used singly or in an appropriate mixture.

The additives supplied from the additive supply unit 52 may include components other than the resin that binds the fibers. For example, depending on the type of the manufactured sheet S, a coloring agent for coloring fibers, an aggregation inhibitor for inhibiting fiber aggregation or resin aggregation, and a non-flammable flame retardant for fibers and the like may be included. The additives may be fibrous or powdery.

The mixing blower 56 generates airflow in the pipe 54 connecting the pipe 7 and the stacking section 60. In addition, the first screening material transferred from the tube 7 to the tube 54 and the additive supplied to the tube 54 by the additive supply unit 52 are mixed when passing through the mixing blower 56. The hybrid blower 56 may be configured to include, for example, a motor (not shown), a blade (not shown) rotated by driving by the motor, and a box (not shown) for storing the blade, or may be a connection between the blade and the box. Body composition. The mixing blower 56 may include a mixer that mixes the first sieve and the additive in addition to the blades that generate the airflow. The mixture mixed in the mixing section 50 is conveyed to the stacking section 60 by the air flow generated by the mixing blower 56, and is introduced into the introduction port 62 of the stacking section 60.

The stacking unit 60 disassembles the fibers of the mixture and lowers them to the second mesh forming unit 70 while dispersing them in the air. When the additives supplied from the additive supply section 52 are fibrous, these fibers are also disassembled in the stacking section 60 and lowered to the second mesh forming section 70. The second mesh forming portion 70 accumulates the mixture descending from the stacking portion 60 to form a second mesh W2.

FIG. 3 is a view showing a schematic configuration of the stacking section 60 and the second mesh forming section 70, and is a side view of the main sections. As shown in FIGS. 1 and 3, the stacking unit 60 includes a cylindrical portion 61 and a shell portion 63 that houses the cylindrical portion 61.

The stacking section 60 includes a cylindrical section 61 and a shell section 63 that accommodates the cylindrical section 61. The cylindrical portion 61 is a cylindrical structure. In Fig. 3, the opening of the tube portion 61 is indicated by the symbol 61a.

The tubular portion 61 is configured using, for example, a sieve similarly to the tubular portion 61. Specifically, the tube portion 61 includes a mesh, a filter, a mesh screen, and the like having an opening and functioning as a sieve. Specifically, the cylindrical portion 61 has a cylindrical shape, and is rotated and driven around the axis of the cylinder by a second sieve motor 60a (driving portion, sieve driving portion). At least a part of the peripheral surface of the tube portion 61 is a net. The net of the tube portion 61 is constituted by a metal net extending a gold net, a metal plate having a score, a punched metal plate, and the like. The tube portion 61 is rotated by the power of the second sieve motor 60a, and functions as a sieve, and the mixture disassembled by the rotation of the tube portion 61 is lowered through the opening 61a. Here, the mixture introduced from the introduction port 62 is represented by the symbol MX.

The operating speed of the tube portion 61 by the power of the second sieve motor 60a is set to a speed VD. The speed VD may also be referred to as the rotation speed of the barrel portion 61. In addition, the rotation direction of the tube portion 61 is not limited to the direction shown in FIG. 3, and may be a reverse direction, and the second screen motor 60a may switch the rotation direction to perform a reciprocating operation. The speed VD is not limited to the speed in the direction shown by the arrow in FIG. 3, and it refers to the relative speed with respect to the barrel portion 61 in a stationary state.

A second mesh forming portion 70 is disposed below the cylindrical portion 61. The second mesh forming section 70 includes, for example, a mesh belt 72, a tension roller 74, and a suction mechanism 76.

The mesh belt 72 is formed of a metal belt having the same loop shape as the mesh belt 46 and is stretched over a plurality of tension rollers 74. The mesh belt 72 surrounds a track constituted by the tension roller 74. A part of the track of the mesh belt 72 is flat below the tube portion 61, and the mesh belt 72 forms a flat surface. A plurality of openings are formed in the mesh belt 72.

One of the tension rollers 74 is a driving roller 74 a that drives the mesh belt 72. The driving roller 74a is driven to rotate by the second belt motor 74b, and drives the mesh belt 72 in a direction indicated by an arrow in the figure. The operation speed of the mesh belt 72 by the driving force of the second belt motor 74b is set to the speed VC. The speed VC may also be referred to as the conveying speed of the mesh belt 72.

For the second screen motor 60a and the second belt motor 74b, well-known motors such as a servo motor and a stepping motor can be used. Between the second sieve motor 60a and the cylindrical portion 61, other transmission mechanisms such as gears and connecting rods for transmitting power may be provided. The same applies to the drive motor 74a and the second belt motor 74b.

By the rotation of the cylindrical portion 61, the mixture MX inside the cylindrical portion 61 passes through the opening 61 a and descends toward the mesh belt 72. Components of the mixture MX lowered from the cylindrical portion 61 that are larger than the opening of the mesh belt 72 are accumulated on the mesh belt 72. Also, the components in the mixture that are smaller than the openings of the mesh belt 72 pass through the openings.

The suction mechanism 76 is connected to the tube 66. The pipe 66 is connected to the second collection blower 68 via the second dust collection portion 67. The second dust collection unit 67 includes a filter that collects particles or fibers passing through the mesh belt 72. The second trap blower 68 is a blower that sucks the air passing through the pipe 66 and discharges the sucked air to the outside of the sheet manufacturing apparatus 100 or a specific position in the sheet manufacturing apparatus 100. The suction mechanism 76 sucks air from below the mesh belt 72 by the suction force of the second collection blower 68, and captures particles or fibers contained in the sucked air by the second dust collection portion 67. The air flow sucked by the second collection blower 68 attracts the mixture descending from the tube portion 61 toward the mesh belt 72, and has the effect of promoting accumulation. In addition, the suction air flow of the suction portion 48 forms a downflow in the path where the mixture falls from the tube portion 61, and the effect of preventing the fibers from entanglement during the drop process can also be expected. The mixture MX deposited on the mesh belt 72 has a mesh shape on a flat portion of the mesh belt 72 and constitutes a second mesh sheet W2.

Returning to FIG. 1, in the conveying path of the mesh belt 72, a humidity control section 78 is provided on the downstream side of the stacking section 60. The humidity control unit 78 is a mist type humidifier that supplies water to the mesh belt 72 in a mist-like manner. The humidity control unit 78 includes, for example, a tank for storing water, or an ultrasonic transducer that changes water into a mist. Since the water content of the second mesh sheet W2 is adjusted by the water mist supplied from the humidity control section 78, the effect of suppressing the adsorption of fibers to the mesh belt 72 due to static electricity can be expected.

The second mesh sheet W2 is peeled from the mesh belt 72 by the conveying section 79 and is conveyed to the forming section 80. The transfer unit 79 includes, for example, a mesh belt 79a, a roller 79b, and a suction mechanism 79c. The suction mechanism 79c is provided with a blower (not shown), and an upward air flow is generated by the mesh belt 79a by the suction force of the blower. With this airflow, the second mesh W2 is separated from the mesh belt 72 and is attracted to the mesh belt 79a. The mesh belt 79a is moved by the rotation of the roller 79b, and the 2nd mesh sheet W2 is conveyed to the shaping | molding part 80.

The forming section 80 applies heat to the second mesh W2, so that the fibers from the first sieve contained in the second mesh W2 are bound by the resin contained in the additive. The forming section 80 includes a pressing section 82 that presses the second mesh W2 and a heating section 84 that heats the second mesh W2 that is pressurized by the pressing section 82. The pressing section 82 is configured by a pair of calender rollers 85 and 85. The pressing portion 82 is connected to a pressing mechanism (not shown) that applies a nip pressure to the calender rollers 85 and 85 by oil pressure, and a driving portion such as a motor that rotates the calender rollers 85 and 85 toward the heating portion 84 ( (Illustration omitted). The pressing section 82 presses the second mesh W2 with a specific nip pressure by the calender rollers 85 and 85 and conveys the second mesh W2 to the heating section 84. The heating section 84 includes a pair of heating rollers 86 and 86. The heating section 84 includes a heater (not shown) that heats the peripheral surface of the heating roller 86 to a specific temperature, and a driving section (not shown) such as a motor that rotates the heating rollers 86 and 86 toward the cutting section 90. . The heating section 84 applies heat while sandwiching the second mesh W2 that has been made denser by the pressure section 82, and conveys the heat to the cutting section 90. The second mesh W2 is heated in the heating section 84 to a temperature higher than the glass transition point of the resin contained in the second mesh W2, and becomes the sheet S.

The cutting section 90 cuts the sheet S formed by the forming section 80. The cutting section 90 has a first cutting section 92 that cuts the sheet S in a direction that intersects the conveying direction of the sheet S as indicated by the symbol F in the figure; and a second cutting section 94 that is in contact with The sheet S is cut in a direction parallel to the conveying direction F. The cutting unit 90 cuts the length and width of the sheet S into a specific size to form a single sheet S. The sheet cut by the cutting section 90 is stored in the discharge section 96. The discharge unit 96 includes a tray or a stocker that stores the manufactured sheets, and the sheets S discharged to the tray can be taken out and used by the user.

Each part of the sheet manufacturing apparatus 100 comprises a defibrating processing part 101 and a manufacturing part 102. The defibrating processing section 101 includes at least a defibrating section 20, and may include a screening section 40 and a first mesh forming section 45. The defibrating processing unit 101 manufactures a defibrated material from the raw material MA, or manufactures a first mesh W1 that forms the defibrated material into a mesh shape. The manufactured product of the defibrating treatment section 101 is not only transferred to the mixing section 50 through the rotating body 49, but may also be removed from the sheet manufacturing apparatus 100 and stored without being transferred to the rotating body 49. In addition, the manufactured product may be enclosed in a specific package and may be transported and traded.

The manufacturing unit 102 is a functional unit that regenerates the manufactured product manufactured by the defibrating processing unit 101 into a sheet S, and corresponds to a processing unit. The manufacturing section 102 includes a mixing section 50, a stacking section 60, a second mesh forming section 70, a conveying section 79, a forming section 80, and a cutting section 90, and may include a rotating body 49. The additive supply unit 52 may be included.

The sheet manufacturing apparatus 100 may be configured integrally with the defibrating processing section 101 and the manufacturing section 102 or may be configured separately. In this case, the defibrating treatment section 101 corresponds to the fiber raw material regeneration device of the present invention. The manufacturing section 102 corresponds to a sheet forming section that shapes the defibrated material into a sheet shape. In addition, any of these can be called a processing department.

[1-2. Forming Conditions of First Mesh] Here, the forming conditions of the first mesh W1 formed by the first mesh forming portion 45 will be described with reference to FIG. 2. The thickness of the first mesh sheet W1 is determined based on the amount of the first screening material MC supplied to the mesh belt 46 and the amount of movement of the mesh belt 46 per unit time. The amount of movement of the mesh belt 46 per unit time is the speed VA in the figure.

As a factor that determines the amount of the first sifter MC supplied to the mesh belt 46, that is, the amount of the first sifter MC passing through the opening 41a, the speed VB is mentioned. The higher the speed VB, the more quickly the disintegrated material MB is disassembled in the tube portion 41, and the first screening material MC easily passes through the opening 41a. The higher the speed VB, the easier the first screening material MC passes through the opening 41a. Therefore, the faster the speed VB, the greater the amount of the first screening substance MC passing through the opening 41a.

The amount of the first screening material MC passing through the opening 41 a changes when the tube portion 41 starts from the stopped state. In the tube portion 41, friction occurs between the fibers contained in the first sifter MC and the fibers due to the rotation of the tube portion 41, so the first sifter MC is charged. If the first screening substance MC is aggregated by the static electricity, it will be difficult to pass through the opening 41a. On the other hand, during the stop period of the tube portion 41, the charge of the first screening material MC is discharged, so that the aggregation of the fibers contained in the first screening material MC is released. Therefore, when the cylindrical portion 41 starts to rotate from the stopped state, that is, when the cylinder 41 is started, the first sifter MC is in a state that can easily pass through the opening 41a. In this state, the amount of the first screening substance MC passing through the opening 41a will temporarily increase.

The amount of the first screening material MC passing through the opening 41 a is affected by the humidity in the tube portion 41. Here, humidity may be referred to as relative humidity (RH). If the humidity in the tube portion 41 is high, the charging of the fibers contained in the first screening material MC is eased, so that the aggregation of the fibers can be suppressed, so that the amount of the aggregation of the fibers is reduced. Therefore, the higher the humidity in the tube portion 41 is, the less the amount of the first screening material MC passing through the opening 41a changes. In addition, if the humidity in the tube portion 41 is low, the charging of the fibers contained in the first sieving material MC is not easy to relax, and agglomeration of the fibers is likely to occur largely, so that the amount of the agglomeration of the fibers is large. Therefore, the lower the humidity in the tube portion 41, the larger the variation in the amount of the first sieving material MC passing through the opening 41a.

In addition, the amount of the first screening material MC passing through the opening 41a varies depending on the fiber length contained in the first screening material MC. The shorter fibers easily pass through the opening 41a. Therefore, the shorter the fiber contained in the first screening material MC, the larger the amount of the first screening material MC passing through the opening 41a.

That is, the maximum factor that determines the amount of the first screening material MC to be supplied from the tube portion 41 to the mesh belt 46 is the speed VB of the tube portion 41. In addition, as a factor for changing the amount of the first sieving material MC, whether the tube portion 41 is activated, the humidity in the tube portion 41, and the length of the fiber contained in the first sieving material MC are listed.

If the thickness of the first mesh sheet W1 is changed, the amount of material supplied to the first mesh sheet forming section 45 in the subsequent steps will be changed, and the quality of the sheet S manufactured by the sheet manufacturing apparatus 100 will be affected. Therefore, the sheet manufacturing apparatus 100 performs control to suppress the thickness variation of the first mesh W1 by the control unit 150.

In order to control the thickness of the first mesh W1, the sheet manufacturing apparatus 100 includes a first belt speed detection unit 322 (FIG. 4) that detects the speed VA, and a first screen speed detection unit 321 (FIG. 4) that detects the speed VB. ).

The sheet manufacturing apparatus 100 can detect the humidity in the tube portion 41. In this embodiment, as an example, a first temperature and humidity detection unit 323 (humidity detection unit) is provided. The first temperature and humidity detection unit 323 can be configured as a sensor unit including a temperature sensor and a humidity sensor. As the temperature sensor, elements such as a thermistor, a temperature measuring resistor, a thermocouple, and an IC temperature sensor can be used. As long as the humidity sensor can detect relative humidity, a resistive humidity sensor or an electrostatic capacitance type humidity sensor can be used. The first temperature and humidity sensor 323 detects the temperature and relative humidity in the internal space of the tube portion 41. The first temperature and humidity detection unit 323 may output an analog signal as a detection value of temperature or humidity, and may also output digital data indicating the detection value. In addition, it can also output the data of the integrated temperature detection value and humidity detection value.

The sheet manufacturing apparatus 100 includes a first thickness detection unit 324. The first thickness detecting section 324 is a sensor that detects the thickness of the first mesh W1. For example, the first thickness detecting section 324 may be an optical thickness sensor, which includes a light source and a light receiving sensor, and irradiates light to the first mesh W1, and detects the first amount by detecting the amount of light transmitted through the first mesh W1. 1 mesh W1 thickness. In addition, for example, the first thickness detection unit 324 may be a contact-type thickness sensor including a contact member in contact with the first mesh sheet W1 and an encoder that detects the position of the contact element, and detects the surface of the first mesh sheet W1. The distance from the surface of the mesh belt 46. The first thickness detection unit 324 may be an ultrasonic thickness sensor, or may be a sensor that detects thickness in other ways.

The control device 110 may also perform control for adjusting the thickness of the first mesh W1 based on the detection value of the first thickness detection section 324. For example, when the control device 110 deviates from the preset range of the detection value of the first thickness detection unit 324, the control device 110 may stop the sheet material manufacturing device 100 and may report it.

[1-3. Configuration of Second Mesh Forming Section] As shown in FIG. 3, the sheet manufacturing apparatus 100 may further include a second temperature and humidity detecting section 333 as a configuration for detecting the humidity in the tube section 61. Like the first temperature and humidity detection unit 323, the second temperature and humidity detection unit 333 can be configured as a sensor unit including a temperature sensor and a humidity sensor. As the temperature sensor, elements such as a thermistor, a temperature measuring resistor, a thermocouple, and an IC temperature sensor can be used. As long as the humidity sensor can detect relative humidity, a resistive humidity sensor or an electrostatic capacitance type humidity sensor can be used. The second temperature and humidity detection unit 333 detects the temperature and relative humidity in the internal space of the tube portion 61. The second temperature and humidity detection unit 333 can output an analog signal as a detection value of temperature or humidity, and can also output digital data indicating the detection value. In addition, it can also output the data of the integrated temperature detection value and humidity detection value.

The sheet manufacturing apparatus 100 includes a second thickness detection unit 334. The second thickness detecting section 334 is a sensor that detects the thickness of the second mesh W2. For example, the second thickness detection unit 334 may be an optical thickness sensor, which includes a light source and a light receiving sensor, irradiates light to the second mesh W2, and detects the amount of light transmitted through the second mesh W2. 2 Mesh W2 thickness. In addition, for example, the second thickness detection unit 334 may be a contact-type thickness sensor, which includes a contact member in contact with the second mesh W2 and an encoder that detects the position of the contact, and detects the surface of the second mesh W2. The distance from the surface of the mesh belt 72. The second thickness detection unit 334 may be an ultrasonic thickness sensor, or may be a sensor that detects the thickness by other methods.

The control device 110 may control the sheet manufacturing device 100 based on the detection value of the second thickness detection unit 334. For example, when the control device 110 deviates from the preset range of the detection value of the second thickness detection unit 334, the control device 110 may stop the sheet material manufacturing device 100 and may report it.

[1-4. Configuration of Control Device] FIG. 4 is a block diagram showing a configuration of a control system of the sheet manufacturing apparatus 100. The sheet manufacturing apparatus 100 includes a control device 110 having a main processor 111 that controls each section of the sheet manufacturing apparatus 100.

The control device 110 includes a main processor 111, a ROM (Read Only Memory) 112, and a RAM (Random Access Memory) 113. The main processor 111 is an arithmetic processing device such as a CPU (Central Processing Unit, central processing unit), and executes a basic control program stored in the ROM 112 to control each part of the sheet manufacturing apparatus 100. The main processor 111 may also be configured as a system chip including peripheral circuits such as ROM 112 and RAM 113 and other IP cores.

The ROM 112 non-volatilely stores programs executed by the main processor 111. The RAM 113 forms a working area used by the main processor 111, and temporarily stores programs executed by the main processor 111 and data of a processing object.

The non-volatile memory section 120 stores programs executed by the main processor 111 or data processed by the main processor 111.

The display panel 116 is a display panel such as a liquid crystal display, and is provided outside the sheet manufacturing apparatus 100, for example. The display panel 116 displays the operation state, various setting values, warning displays, and the like of the sheet manufacturing apparatus 100 according to the control of the main processor 111.

The touch sensor 117 detects a touch operation and a pressing operation of the user. The touch sensor 117 is, for example, arranged on the display surface of the display panel 116 to detect operations on the display panel. The touch sensor 117 outputs operation data including the operation position and the number of operation positions to the main processor 111 corresponding to the operation. The main processor 111 detects an operation on the display panel 116 according to an output of the touch sensor 117 to obtain an operation position. The main processor 111 implements a GUI (Graphical User Interface) operation based on the operation position detected by the touch sensor 117 and the display data 122 displayed on the display panel 116.

The control device 110 is connected to a sensor provided in each section of the sheet manufacturing apparatus 100 via a sensor I / F (interface) 114. The sensor I / F 114 obtains a detection value output by the sensor and inputs it to an interface of the main processor 111. The sensor I / F114 may also be provided with an A / D (Analogue / Digital, analog / digital) converter, which converts analog signals output by the sensor into digital data. In addition, the sensor I / F 114 may supply a driving current to each sensor. In addition, the sensor I / F 114 may include a circuit that obtains the output value of each sensor according to a sampling frequency designated by the main processor 111 and outputs the output value to the main processor 111.

A raw material sensor 301 and a paper discharge sensor 302 are connected to the sensor I / F 114. The sensor I / F 114 is connected to a first sieve speed detection unit 321, a first belt speed detection unit 322, a first temperature and humidity detection unit 323, and a first thickness detection unit 324. Further, the sensor I / F 114 is connected to a second sieve speed detection unit 331, a second belt speed detection unit 332, a second temperature and humidity detection unit 333, and a second thickness detection unit 334.

The first sieve speed detection unit 321 detects the speed VB. The first sieve speed detection unit 321 may be provided with a sensor or a rotary encoder that is in contact with the rotation shaft or the peripheral surface of the cylindrical portion 41 and detects the rotation speed. The first sieve speed detection unit 321 may be a circuit provided inside the first sieve motor 40a or configured as a part of the first sieve motor 40a, and the output indicates the number or rotation of the first sieve motor 40a Speed signal. The control device 110 may also function as the first sieve speed detection unit 321 and obtain the rotation speed of the first sieve motor 40a based on the driving current of the first sieve motor 40a. The second sieve speed detection unit 331 detects the speed VD, which is the operating speed of the tube portion 61. The second sieve speed detection unit 331 may have the same configuration as the first sieve speed detection unit 321.

The first belt speed detection unit 322 detects the speed VA, which is the operating speed of the mesh belt 46. The first belt speed detection unit 322 detects the moving speed of the mesh belt 46, the rotation speed of the tension roller 74, or the rotation speed of the first belt motor 47b. The first belt speed detection unit 322 may include a speed sensor or a rotary encoder. The first belt speed detection unit 322 may be a circuit provided inside the first belt motor 47b or configured as a part of the first belt motor 47b, and the output indicates the number of rotations or rotation of the first belt motor 47b Speed signal. The control device 110 may also function as the first belt speed detection unit 322 and obtain the rotation speed of the first belt motor 47b based on the driving current of the first belt motor 47b. The second belt speed detection unit 332 detects the speed VC, which is the operating speed of the mesh belt 72. The second belt speed detection unit 332 may have the same configuration as the second sieve speed detection unit 331.

The raw material sensor 301 detects the remaining amount of the raw material MA accommodated in the supply unit 10. The paper discharge sensor 301 detects the amount of the sheet S accumulated in a tray or a stocker included in the discharge section 96.

The control device 110 is connected to each drive unit provided in the sheet manufacturing apparatus 100 via a drive unit I / F (interface) 115. The driving unit included in the sheet manufacturing apparatus 100 is a motor, a pump, a heater, or the like. The driving unit I / F 115 may be directly connected to the motor, or may be connected to a driving circuit or a driving IC (Integrated Circuit) that supplies a driving current to the motor under the control of the control device 110.

The drive unit I / F 115 is connected to the coarse crushing unit 311, the defibrating unit 312, the additive supply unit 313, the blower 314, the humidity control unit 315, the drum driving unit 316, the breaking unit 317, and the cutting unit 318 as control devices. Controlled by 110.

The coarse crushing portion 311 includes a drive portion such as a motor that rotates the coarse crushing blade 14. The defibrating unit 312 includes a driving unit such as a motor that rotates a rotor (not shown) included in the defibrating unit 20. The additive supply unit 313 includes a drive unit such as a motor that drives a screw feeder that sends out additives, a motor that opens and closes a shutter, or an actuator.

The blower 314 includes a first capture blower 28, a hybrid blower 56, a second capture blower 68, and the like. These blowers may be individually connected to the drive unit I / F115. The humidity control unit 315 includes an ultrasonic vibration generating device (not shown), a fan (not shown), a pump (not shown), and the like provided in the humidity control unit 78. The tube driving section 316 includes a driving section such as a motor that rotates the tube section 41 and a motor that rotates the tube section 61. The breaking unit 317 includes a driving unit such as a motor (not shown) that rotates the rotating body 49. The cutting section 318 includes a motor (not shown) or the like that operates the knife in each of the first cutting section 92 and the second cutting section 94 of the cutting section 90.

A motor for driving the calender roller 85 or a heater for heating the heating roller 86 may be connected to the driving section I / F 115.

The drive unit I / F 115 is connected to a first screen motor 40a, a first belt motor 47b, a second screen motor 60a, and a second belt motor 74b. The control device 110 can control the rotation start and stop of the motors. The control device 110 can control the rotation speed of the first screen motor 40a and the first belt motor 47b.

FIG. 5 is a functional block diagram of the control device 110. The control device 110 executes programs by the main processor 111, and realizes various functional units through cooperation between software and hardware. FIG. 5 shows the function of the main processor 111 having these functional units as the control unit 150. In addition, the control device 110 uses a memory area of the non-volatile memory portion 120 to constitute a memory portion 160 which is a logical memory device. Here, the memory section 160 may be configured using a memory area of the ROM 112 or the RAM 113.

The control unit 150 includes a detection control unit 151 and a drive control unit 152. Each of these units is implemented by the main processor 111 executing a program. The control device 110 may also execute an operating system (OS) constituting a platform of application programs as a basic control program for controlling the sheet manufacturing device 100. In this case, each functional unit of the control unit 150 may be installed as an application.

FIG. 5 shows the first sieve speed detection section 321, the first belt speed detection section 322, the first temperature and humidity detection section 323, and the first thickness detection section 324 as the detection sections to be controlled by the control section 150. In addition, a second sieve speed detection unit 331, a second belt speed detection unit 332, a second temperature and humidity detection unit 333, and a second thickness detection unit 334 are displayed. Moreover, these other sensors may be displayed together as the sensor 300.

In addition, FIG. 5 shows the first screen motor 40 a, the first belt motor 47 b, the second screen motor 60 a, and the second belt motor 74 b as drive units to be controlled by the control unit 150. The other driving units are collectively displayed as the driving unit 310.

The storage unit 160 stores various data processed by the control unit 150. For example, the storage unit 160 stores setting data 161, reference value data 162, and speed setting data 163.

The setting data 161 is generated by the operation of the touch sensor 117 or a command or data input through a communication interface (not shown) provided in the control device 110 and is stored in the memory 160.

The setting data 161 includes various setting values and the like related to the operation of the sheet manufacturing apparatus 100. For example, the setting data 161 includes setting values such as the number of sheets S manufactured by the sheet manufacturing apparatus 100, the type or color of the sheets S, and the operating conditions of each part of the sheet manufacturing apparatus 100. In addition, the setting data 161 includes a setting value input by the touch sensor 117 for the fiber length of the raw material MA processed by the sheet manufacturing apparatus 100. For example, if the raw material MA is the sheet S manufactured by the sheet manufacturing apparatus 100 and contains fibers processed by the sheet manufacturing apparatus 100 several times, or when the raw material MA contains fibers from a broadleaf tree, the raw material MA contains short fiber. The setting data 161 may also include values input by items related to the fiber length of the raw material MA, such as the type of the raw material MA, as the data of the fiber length of the raw material MA.

The reference value data 162 includes a reference value for determining an operating condition for manufacturing the sheet S by the sheet manufacturing apparatus 100. Specifically, the reference value data 162 includes a reference value that distinguishes whether the humidity detected by the first temperature and humidity detection unit 323 is more or less. Further, the reference value data 162 may include a speed for detecting the speed detected by the first sieve speed detection unit 321, the first belt speed detection unit 322, the second sieve speed detection unit 331, and the second belt speed detection unit 332. Benchmark value. The reference value data 162 may include a reference for determining the detection values of the first thickness detection unit 324 and the second thickness detection unit 334.

The reference value included in the reference value data 162 may be a value or a reference of a range of the upper limit reference value and the lower limit reference value including the value.

The speed setting data 163 includes data used by the control unit 150 to control the speed of the first sieve motor 40a. As described later, the control unit 150 accelerates the first sieve motor 40a and operates the tube portion 41 at a speed suitable for manufacturing the sheet S when the sheet manufacturing apparatus 100 starts the operation of manufacturing the sheet S from the stopped state. In this process, the control unit 150 accelerates the speed VB from the speed 0 so as to suppress the thickness variation of the first mesh W1. The speed setting data 163 includes speed-related data in a case where the barrel portion 41 accelerates the speed VB from the stopped state. For example, the speed setting data 163 includes data related to a speed condition that specifies the relationship between the time when the barrel portion 41 is accelerated from the speed 0 and the speed VB. The speed condition may be a condition that specifies a change in speed. In this case, it may also be called a speed mode.

The detection control unit 151 controls the detection of the sensor 300 to obtain the detection value of each sensor. In addition, the detection control unit 151 acquires the detection values of the first sieve speed detection unit 321, the second belt speed detection unit 322, the first temperature and humidity detection unit 323, and the first thickness detection unit 324. In addition, the detection control unit 151 acquires the detection values of the second sieve speed detection unit 331, the second belt speed detection unit 332, the second temperature and humidity detection unit 333, and the second thickness detection unit 334.

The drive control unit 152 controls the drive unit 310 based on the detection value of the sensor 300 obtained by the detection control unit 151, thereby causing each part of the sheet manufacturing apparatus 100 to operate according to the setting value of the setting data 161 to manufacture the sheet S .

The drive control unit 152 drives the first screen motor 40a, the first belt motor 47b, the second screen motor 60a, and the second belt motor 74b. Here, the drive control section 152 controls the speeds of the first screen motor 40a and the first belt motor 47b based on the detection values of the first screen speed detection section 321 and the first belt speed detection section 322 obtained by the detection control section 151. . Thereby, the speeds VA and VB are adjusted to the set speeds. The drive control unit 152 controls the speeds of the second screen motor 60a and the second belt motor 74b based on the detection values of the second screen speed detection unit 331 and the second belt speed detection unit 332 obtained by the detection control unit 151. Thereby, the speeds VC and VD are adjusted to the set speeds.

The drive control unit 152 sets the speed condition of the first sieve motor 40a when the cylindrical portion 41 is activated from the stopped state. The speed condition is information that specifies the speed-up state of the first sieve motor 40a accelerating from the stopped state. The drive control unit 152 sets a speed condition based on the detection value, the setting data 161, the reference value data 162, and the speed setting data 163 of the first temperature and humidity detection unit 323 obtained by the detection control unit 151.

[1-5. Operation of Sheet Manufacturing Apparatus] FIG. 6 and FIG. 7 are flowcharts showing the operation of the sheet manufacturing apparatus 100, and show the actions when the sheet manufacturing apparatus 100 is started from a stopped state. The operations of FIGS. 6 and 7 are performed by the control unit 150 by the drive control unit 152.

The control unit 150 performs setting processing related to the operation of the first screen motor 40a (step ST1). The setting process in step ST1 is a process for performing setting related to the speed of the first sieve motor 40a when the first sieve motor 40a is activated. The setting process will be described later with reference to FIG. 7.

The control unit 150 starts the startup sequence after the setting process (step ST2). The start-up sequence refers to a series of actions in which the sheet manufacturing apparatus 100 sequentially starts each part of the sheet manufacturing apparatus 100 from a stopped state. Specifically, the coarse crushing section 12, the defibrating section 20, the screening section 40, the first mesh forming section 45, the rotating body 49, the mixing section 50, the stacking section 60, the second mesh forming section 70, and the forming section 80 And the state where the cutting section 90 is stopped, these sections are started.

When the startup sequence is started, the control unit 150 controls the humidity control unit 315 to start the operation of the humidity control unit 78 (step ST3). When the sheet manufacturing apparatus 100 includes a humidifying device other than the humidity control unit 78, the device is started in step ST3.

Next, the control unit 150 activates the blower 314 (step ST4) and activates the defibration unit 312, whereby the defibration unit 20 starts to rotate and accelerates (step ST5). After that, the defibrating section 20 is accelerated to a predetermined speed, and thereafter operates at a constant speed. The control unit 150 activates the coarse crushing unit 311 (step ST6). After step ST6, the coarsely crushed portion 311 is supplied with a fiber-containing material.

Further, the control unit 150 activates the first sieve motor 40a and the first belt motor 47b, and starts driving the tube portion 41 and the mesh belt 46 of the screening unit 40 (step ST7). In step ST7, the first sieve motor 40a is started in accordance with the conditions set in step ST1, and the speed of the first sieve motor 40a is accelerated.

The control unit 150 activates the second sieve motor 60a and the second belt motor 74b, and starts driving the tube portion 61 and the mesh belt 72 (step ST8). After that, the control unit 150 starts the operation of the calender roll 85 and the heating roll 86 of the forming unit 80 (step ST9), and ends the startup sequence.

FIG. 7 is a flowchart showing the setting processing of step ST1 in FIG. 6 in detail. The control unit 150 determines whether there is a defibrated matter MB inside the tube portion 41 (step ST21). The presence or absence of the defibrated substance MB can also be determined based on the input of the touch sensor 117, for example.

When it is determined that there is no defibrated matter MB inside the tube portion 41 (step ST21; No), the control unit 150 sets the first speed condition as a condition for accelerating the speed of the first screen motor 40a (step ST22), and ends the setting process.

When it is determined that there is a defibrated material MB inside the tube portion 41 (step ST21; Yes), the control unit 150 determines whether the humidity detected by the first temperature and humidity detection unit 323 is equal to or greater than the reference value contained in the reference value data 162 (Step ST23). When the humidity is equal to or greater than the reference value (step ST23; Yes), the control unit 150 determines whether the length of the fiber contained in the defibrated material MB is equal to or greater than the reference value contained in the reference value data 162 (step ST24).

When the fiber length is equal to or greater than the reference value (step ST24; Yes), the control unit 150 sets the second speed condition as a condition for accelerating the speed of the first sieve motor 40a (step ST25), and ends the setting process. When the length of the fiber is shorter than the reference value (step ST24; No), the control unit 150 sets a third speed condition as a condition for accelerating the speed of the first sieve motor 40a (step ST26), and ends the setting process.

On the other hand, when the humidity is lower than the reference value (step ST23; No), the control unit 150 determines whether the length of the fiber contained in the defibrated material MB is greater than the reference value contained in the reference value data 162 (step ST27).

When the fiber length is equal to or greater than the reference value (step ST27; Yes), the control unit 150 sets a fourth speed condition as a condition for accelerating the speed of the first sieve motor 40a (step ST28), and ends the setting process. When the length of the fiber is shorter than the reference value (step ST27; No), the control unit 150 sets a fifth speed condition as a condition for accelerating the speed of the first sieve motor 40a (step ST28), and ends the setting process.

The first to fifth speed conditions are basic conditions in which the speed VB is accelerated from zero when the barrel 41 is started, and include the target speed of the first screen motor 40a and the time until the target speed is reached or the acceleration of the first screen motor 40a. .

FIG. 8 is a graph showing an example of changes in the operating speed VB of the tube portion 41 and the thickness of the first mesh W1. The speed VB is the detection value of the first sieve speed detection section 321, and the thickness of the first mesh W1 is the detection value of the first thickness detection section 324.

FIG. 8 (1) shows the speed VB, and (2) shows the thickness of the first mesh W1. That is, (2) the detection value of the first thickness detection section 324 in a case where the display speed VB changes like (1). The vertical axis is the speed VB and the thickness of the first mesh W1, and the coordinate 0 on the vertical axis represents the speed 0 (stopped state) and the thickness 0 of the first mesh W1. The horizontal axis in FIG. 8 is the passage of time, and the coordinate 0 corresponds to the starting point of the startup sequence. After the start sequence is started, the time at which the first sieve motor 40a starts to rotate is set to time T1. The target value set for the thickness of the first mesh W1 is set to the thickness TH1. In this operation example, it is preferable that the thickness of the first mesh W1 is maintained at the thickness TH1. The thickness TH1 can be set to a value in the range of 2 mm to 10 mm, for example, but it can be thicker or thinner.

8 shows an example in which the control unit 150 controls the first sieve motor 40a according to the first speed condition, and displays the value detected by the first thickness detection unit 324 in (2). In the examples of FIGS. 8 and 9 to 12 described later, the target speed of the speed VB is set to the speed V1. The target speed V1 corresponds to the first speed of the present invention. The target speed V1 can be set to a value within a range of, for example, 50 rpm to 1000 rpm, but may be a lower speed or a higher speed. In the following description, the time required to accelerate the speed VB to the target speed V1 is referred to as an acceleration time.

The first speed condition is a condition that the speed VB reaches the target speed V1 at time T2. In other words, the acceleration time is a period TE1 from time T1 to time T2. The period TE1 may be set to a value in the range of 1 second to 10 seconds, for example, but may be shorter or longer.

As described above, if the tube portion 41 is started in the state where the defibrillation substance MB is present inside the tube portion 41, the amount of the first screening material MC descending from the tube portion 41 will temporarily be more than that in the tube portion 41 without the defiberization substance. MB situation. Therefore, after the first sieve motor 40a starts to rotate, the amount of the first sifter MC that is lowered to the mesh belt 46 is temporarily larger than the amount suitable for manufacturing the sheet S. As a result, as shown in FIG. 8 (2), the thickness of the first mesh W1 exceeds the thickness TH1, and the peak value TH2 of the thickness is significantly larger than the thickness TH1.

In the setting processing of FIG. 7, when the defibrated material MB is present in the tube portion 41, the control unit 150 sets any one of the second to fifth speed conditions. In any of the second to fifth speed conditions, the speed VB is set to be lower than the target speed V1 at a specific time. Specifically, the acceleration time is set to be longer than the period TE1.

The second speed condition is set when the defibrated material MB is present in the tube portion 41, the humidity detected by the first temperature and humidity detection unit 323 is equal to or greater than the reference value, and the fiber length is equal to or greater than the reference value. The second speed condition is a condition adjusted so that the acceleration time is longer than the period TE1. Therefore, the time when the speed VB reaches the target speed V1 under the second speed condition is later than the time T2.

The fourth speed condition is set when a defibrated material MB exists in the tube portion 41, the humidity detected by the first temperature and humidity detection unit 323 is a low humidity below a reference value, and the fiber length is a reference value or more. In this case, as compared with the case where the second speed condition is set, the humidity in the tube portion 41 is low, and therefore the amount of the first sifter MC dropped from the tube portion 41 becomes temporarily larger. Therefore, the fourth speed condition is a condition in which the acceleration time is adjusted to be longer than the second speed condition. The time when the speed VB reaches the target speed V1 under the fourth speed condition is later than the time under the second speed condition.

The third speed condition is set when a defibrated material MB is present in the tube portion 41, the humidity detected by the first temperature and humidity detection unit 323 is equal to or greater than the reference value, and the fiber length is shorter than the reference value. In this case, since the fiber length is shorter than that in the case where the second speed condition is set, the amount of the first sieving material MC lowered from the tube portion 41 temporarily becomes larger. Therefore, the third speed condition is a condition in which the acceleration time is adjusted to be longer than the second speed condition. The time when the speed VB reaches the target speed V1 under the third speed condition is later than the time under the second speed condition.

When the third speed condition is compared with the fourth speed condition, the time required for the speed VB to reach the target speed V1 may be the same or different. The length of the acceleration time is to consider whether the influence of the humidity in the barrel portion 41 on the reduction amount of the first screening material MC and the effect of the fiber length of the defibrated material MB on the reduction amount of the first screening material MC are greater. Decide.

If the influence of the humidity in the barrel 41 on the drop of the first screening material MC is greater than the fiber length of the defibrated material MB, it is preferable to adjust the acceleration time in the fourth speed condition to be faster than the acceleration time in the third speed condition. Longer. In addition, if the influence given by the humidity in the tube portion 41 on the amount of drop of the first screening material MC is smaller than the fiber length of the defibrated material MB, it is preferable to adjust the acceleration time of the third speed condition to be longer than that of the fourth speed condition. The acceleration time is longer.

The fifth speed condition is set when a defibrated material MB is present in the tube portion 41, the humidity detected by the first temperature and humidity detection unit 323 is lower than the reference value, and the fiber length is shorter than the reference value. The acceleration time in the fifth speed condition is longer than all of the first to fourth speed conditions. The time when the speed VB reaches the target speed V1 under the fifth speed condition is later than any of the first to fourth speed conditions.

In this way, when the amount of the first sifter MC dropped from the barrel portion 41 to the mesh belt 46 temporarily increases, the control unit 150 suppresses the change in the state of increasing the speed when the first sieve motor 40a is started, thereby suppressing The thickness of the first mesh W1 varies. In addition, when the tube portion 41 is activated (in other words, when the first sieve motor 40a is activated), the speed of the tube portion 41 is adjusted corresponding to the humidity detected by the first temperature and humidity detection unit 323 or the fiber length of the material to be defibrated. The change of the rising aspect can further suppress the thickness variation of the first mesh W1. Thereby, in the step of manufacturing the sheet S, the sheet manufacturing apparatus 100 can stabilize the amount of the first sifter MC supplied to the subsequent steps of the first mesh forming portion 45, and can suppress the quality variation of the sheet S. Therefore, it is possible to reduce the burden of the artificial adjustment work for suppressing the quality variation of the sheet S.

FIG. 9, FIG. 10, FIG. 11 and FIG. 12 are graphs showing examples of changes in the operating speed VB of the tube portion 41 and the thickness of the first mesh W1, and examples of cases where the second to fifth speed conditions are set. In these figures, (1) shows the speed VB detected by the first sieve speed detection section 321, and (2) shows the thickness of the first mesh W1 detected by the first thickness detection section 324. The vertical axis, the horizontal axis, the target speed V1, the thickness TH1, TH2, and the time T1 of these figures are common to FIG. 8. In each of these figures, time T2 shown in FIG. 8 is shown for comparison.

FIG. 9 shows an example in which the speed VB is changed stepwise, and particularly shows an example in which the speed VB is changed in two steps. The control unit 150 sets a period during which the intermediate speed V2 is maintained at a lower speed than the target speed V1 before the speed VB is accelerated to the target speed V1. Specifically, the control unit 150 accelerates so that the rotation of the first sieve motor 40a starts at time T1 and the speed VB reaches the intermediate speed V2 at time T3. The control unit 150 performs control such that the speed VB is maintained at the intermediate speed V2 until time T4, and the first screen motor 40a is further increased from time T4 to reach the target speed V1 at time T5.

In the example of FIG. 9, the time T5 at which the speed VB reaches the target speed V1 is later than the time T2 described above. That is, after the control unit 150 starts the rotation of the first sieve motor 40a, the state in which the speed VB is lower than the target speed V1 (speed V2) is maintained from time T1 to T5. As shown in FIG. 9 (2), the detection value of the first thickness detection section 324 varies from around the time T2, but the peak value TH3 of the thickness of the first mesh W1 is smaller than the thickness value TH2 of the thickness shown in FIG. Therefore, it can be seen that the thickness variation of the first mesh W1 is suppressed.

FIG. 10 shows an example in which the speed VB is changed stepwise, and particularly shows an example in which the speed VB is changed in three steps. The control unit 150 sets a period during which the intermediate speed V4 and the intermediate speed V5 are maintained at a lower speed than the target speed V1 before the speed VB is accelerated to the target speed V1. Specifically, the control unit 150 accelerates so that the rotation of the first sieve motor 40a starts at time T1 and the speed VB reaches the intermediate speed V4 at time T11. The control unit 150 performs control such that the speed VB is maintained at the intermediate speed V4 until time T12, and the first screen motor 40a is further increased from time T12 to reach the target speed V5 at time T13. The control unit 150 performs control such that the speed VB is maintained at the intermediate speed V5 until time T14, and the first screen motor 40a is further increased from time T14 to reach the target speed V1 at time T15.

In the example of FIG. 10, the time T15 at which the speed VB reaches the target speed V1 is later than the time T2. That is, after the control unit 150 starts the rotation of the first sieve motor 40a, the state in which the speed VB is lower than the target speed V1 is maintained from time T1 to T5. As shown in FIG. 10 (2), the detection value of the first thickness detection section 324 varies from around time T11, but the peak value TH4 of the thickness of the first mesh W1 is smaller than the thickness value TH2 of the thickness shown in FIG. In particular, immediately after the rotation of the barrel 41 of the first screening object MC, which is liable to increase, is set, a period (time T1 to T12) is set to rotate at an intermediate speed V4 that is substantially lower than the target speed V1, thereby reducing the thickness. The peak TH4 was successfully suppressed to be low.

As shown in the examples shown in FIGS. 9 and 10, the control unit 150 can change the speed VB stepwise, and the number of steps or intermediate speed of the speed VB can be arbitrarily changed. For example, the speed VB may be changed in four or more stages.

FIG. 11 shows an example in which the speed VB is linearly changed. The control unit 150 linearly accelerates the speed VB from the speed 0 to the target speed V1 so that the time T21 at which the speed VB reaches the target speed V1 is later than the time T2. That is, the acceleration time is an example in which the acceleration time is longer than the period TE1 (FIG. 8). As shown in FIG. 11 (2), the peak TH5 of the thickness of the first mesh W1 is smaller than the thickness TH2 of the thickness shown in FIG. 8, and the thickness variation of the first mesh W1 is successfully suppressed.

In the example of FIG. 11, the control of the first screen motor 40 a of the control unit 150 is relatively simple. Therefore, there are advantages such that it is easy to manage various data and conditions for controlling the first sieve motor 40a, and the setting and adjustment of conditions are relatively simple.

FIG. 12 shows an example in which the speed VB is changed non-linearly. The control unit 150 controls the first sieve motor 40a so that the acceleration changes while the speed VB accelerates from the speed 0 to the target speed V1, and the speed VB reaches the target speed V1 at time T31. In detail, it includes a first action that decreases the acceleration immediately after the rotation starts at time T1, and then increases the acceleration over time, and a second action that decreases the acceleration as the speed VB approaches the target speed V1. .

In the example of FIG. 12, the time T31 at which the speed VB reaches the target speed V1 is later than the time T2, so the acceleration time is longer than the period TE1 (FIG. 8). In addition, since the change rate of the speed VB, that is, the change in acceleration is relatively gentle, the change in the force of the defibrated material MB applied to the inside of the tube portion 41 is suppressed. Therefore, the effect of suppressing a change in the amount of the first sifter MC falling from the barrel portion 41 can be expected. As shown in FIG. 12 (2), the peak TH6 of the thickness of the first mesh W1 is smaller than the thickness TH2 of the thickness shown in FIG. 8, and the thickness variation of the first mesh W1 is successfully suppressed.

For the second to fifth speed conditions, the examples shown in FIGS. 9 to 12 can be used. For example, in all of the second to fifth speed conditions, the two-stage acceleration mode shown in FIG. 9 can be applied. In this case, the second to fifth speed conditions are set such that the time T5 when the speed VB reaches the target speed V1 is a different time. The second to fifth speed conditions may include various parameters that change the speed VB as shown in FIG. 9.

In addition, the changes in the speed VB under the second to fifth speed conditions may not be common. For example, the second to fifth speed conditions may be conditions in which the speed VB is changed in different aspects among the aspects shown in FIGS. 9 to 12. In the examples shown in FIGS. 9 to 12, the speed VB remains fixed after reaching the target speed V1. However, in the manufacture of the sheet S, the target speed V1 of the speed VB may not be fixed. For example, the speed VB may be changed in accordance with the manufacturing conditions of the sheet S or the operating state of the sheet manufacturing apparatus 100. In addition, as a control corresponding to the detected humidity, it is also possible to determine a lower speed than the target speed V1 based on a result of the humidity detected when the defibrating processing section 101 is stopped and the humidity detected after the defibrating processing section 101 is restarted. Control of intermediate speed V2.

As described above, the sheet manufacturing apparatus 100 to which the first embodiment of the present invention is applied includes the tube portion 41 that filters the first screening material MC that is a material containing fibers; and the mesh belt 46 that discharges the first material discharged from the tube portion 41. Screening MCs pile up. The sheet manufacturing apparatus 100 includes each section of a manufacturing section 102 that is a processing section that processes the first screening material MC deposited on the mesh belt 46. During the operation of manufacturing the sheet S, that is, during the execution of the process, the tube portion 41 operates at the target speed V1, and when the tube portion 41 is started from the stopped state, after the tube portion 41 is started, the operation including the tube portion 41 at a target speed V1 Start action in the state of lower speed. Here, the processing section may be any one of the subsequent steps of the first mesh forming section 45, and may be arbitrarily selected from the sections constituting the manufacturing section 102, for example.

According to the fiber processing apparatus and the sheet manufacturing apparatus 100 according to the first embodiment of the method for controlling a fiber processing apparatus according to the present invention, when the amount of the first screening object MC that moves from the barrel portion 41 to the mesh belt 46 is easily changed, , Adjust the operating speed of the tube portion 41 appropriately. This makes it possible to suppress variations in the amount of the first screening substance MC. Therefore, the thickness variation of the first mesh sheet W1 can be suppressed. Therefore, in the step of manufacturing the sheet S by the sheet manufacturing apparatus 100, the amount of the first screening material MC supplied to the subsequent steps of the first mesh forming section 45 can be made. Stabilization. For example, the quality variation of the sheet S can be suppressed, and the burden of an artificial adjustment operation for stabilizing the quality of the sheet S can be reduced.

During the startup operation, the sheet manufacturing apparatus 100 maintains the state in which the tube portion 41 is operated at a lower speed than the first speed for a predetermined time. For example, as shown in the examples shown in FIGS. 9 to 12, the state where the speed VB has not reached the target speed V1 can be maintained for a longer period than the period TE1 (FIG. 8). Thereby, at the time point when the amount of the first sifter MC dropped from the barrel portion 41 tends to increase, the speed VB is maintained at a lower speed than the target speed V1, so the variation of the amount of the first sifter MC can be effectively suppressed.

In addition, during the start-up operation, the sheet manufacturing apparatus 100 operates the tube portion 41 such that the second portion speed of the tube portion 41 is lower than the target speed V1 for a predetermined time. The second speed corresponds to, for example, the intermediate speed V2 in the example of FIG. 9, and corresponds to the intermediate speeds V4 and V5 in the example of FIG. 10. In this case, by maintaining the speed VB at a certain speed lower than the target speed V1, it is possible to effectively suppress a change in the amount of the first sieving MC that moves from the barrel portion 41 to the mesh belt 46.

In addition, the sheet manufacturing apparatus 100 changes the operating speed of the tube portion 41 during the start-up operation so that the operating speed of the tube portion 41 is lower than the first speed for a specific time. For example, when the speed VB is linearly changed as shown in the example of FIG. 11, or when the speed VB is changed non-linearly as in the example of FIG. 12, the state where the speed VB is lower than the target speed V1 is maintained. In this case, by maintaining the speed VB at a certain speed lower than the target speed V1, it is possible to effectively suppress a change in the amount of the first sieving MC that moves from the barrel portion 41 to the mesh belt 46.

Moreover, in the sheet manufacturing apparatus 100, in a state where the fibrillated matter MB is present in the tube portion 41, the tube portion 41 is started from a stopped state. In this case, the above-mentioned starting operation is performed. Thereby, the speed VB is controlled in a state where the amount of the first screening substance MC lowered from the barrel portion 41 is likely to increase, thereby effectively suppressing the variation of the first screening substance MC amount. In addition, in a state where the amount of the first screening material MC lowered from the barrel portion 41 is not easily changed, a normal startup sequence is performed, so that the manufacturing efficiency of the sheet S can be prevented from being lowered.

The sheet manufacturing apparatus 100 includes a control unit 150 that controls the operation of the tube portion 41. The control unit 150 operates the tube portion 41 based on the target speed V1 during the operation of manufacturing the sheet S. After the control portion 150 is activated, the control portion 150 operates the tube portion 41 for a specific time based on a set speed lower than the target speed V1. The set speed corresponds to the intermediate speed V2 in the example of FIG. 9, and corresponds to the intermediate speeds V4 and V5 in the example of FIG. 10. In this case, by controlling the speed VB to a speed lower than the target speed V1, it is possible to effectively suppress a change in the amount of the first screening material MC moving from the barrel portion 41 to the mesh belt 46.

The sheet manufacturing apparatus 100 includes a first temperature and humidity detection unit 323 that detects humidity. The control unit 150 controls the setting speed in accordance with the humidity information detected by the first temperature and humidity detection unit 323. Therefore, it is possible to appropriately respond to a change in the MC amount of the first screening substance due to a change in humidity, and to effectively suppress a change in the MC amount of the first screening substance. For example, as described above, the higher the humidity in the tube portion 41, the smaller the variation in the amount of the first sieving MC through the opening 41a. In addition, if the humidity in the tube portion 41 is low, it is difficult to ease the charging of the fibers contained in the first screening material MC, and it is easy to generate agglomeration of the fibers, so that the amount of the agglomeration of the fibers is large. Therefore, the lower the humidity in the tube portion 41, the larger the variation in the amount of the first sieving material MC passing through the opening 41a. For example, when the humidity in the tube portion 41 can be detected or estimated from the detection value of the first temperature and humidity detection portion 323, by setting the speed according to the humidity in the tube portion 41, it is possible to appropriately respond to the first 1 Changes in the amount of screening MC.

In addition, the cylindrical portion 41 is formed in a cylindrical shape, an opening is provided in a peripheral surface of the cylindrical portion 41, and the cylindrical portion 41 is rotated around the axis of the cylindrical body. Therefore, if the tube portion 41 is started in the state where the fibrillated material MB is present inside the tube portion 41, the amount of the first screening material MC that drops to the mesh belt 46 at the time of start-up is likely to change. In this configuration, a period during which the barrel portion 41 rotates at a lower speed than the target speed V1 is ensured by the control of the control unit 150, so that the variation in the amount of the first screening substance MC can be suppressed.

The sheet manufacturing apparatus 100 to which the fiber raw material regeneration device of the present invention is applied is provided with a defibrating section 20 as a miniaturizing section for miniaturizing the fiber-containing raw material MA. The sheet manufacturing apparatus 100 includes a tube portion 41 that screens the defibrated material MB that has been refined by the miniaturization portion, and a mesh belt 46 that is a stacking portion that accumulates the first screening material MC discharged from the tube portion 41. The sheet manufacturing apparatus 100 includes each section of the manufacturing section 102 as a processing section that processes the first screening object MC deposited on the grid 46. In addition, the sheet manufacturing apparatus 100 causes the tube portion 41 to operate at the target speed V1 during the manufacturing of the sheet S, that is, the processing of the processing portion. In the sheet manufacturing apparatus 100, when the tube portion 41 is activated from a stopped state when the fiber portion MB exists in the tube portion 41, after the tube portion 41 is started, the tube portion 41 is executed at a lower speed than the target speed V1. The start action of the action state. According to this configuration, in a state where the amount of movement of the first screening object MC from the barrel portion 41 is easily changed, by setting the speed of the barrel portion 41 to be lower than the target speed V1, it is possible to suppress the amount of MC of the first screening object. change.

In the first embodiment, the aspect of changing the speed VB of the tube portion 41 is not limited to the examples shown in FIGS. 9 to 12. For example, after the cylinder 41 is activated, the speed VB may be made higher than the target speed V1. Specifically, the control unit 150 may also take the following form: when the barrel 41 is activated, accelerate the speed VB to a higher speed than the target speed V1, and maintain the barrel 41 at a specific time after the acceleration is completed. The state in which the speed VB of the target speed V1 is operating. In this way, in the starting action, an action including the following actions may be performed: a first action that increases the acceleration of the barrel portion 41 with time; and a second action that makes the barrel portion 41 after the above time elapses The acceleration decreases. In this case, by appropriately controlling the speed change of the tube portion 41, the change in the amount of the first screening substance MC can be reduced. For example, by controlling the change in the acceleration of the tube portion 41 with the control portion 150, it is possible to suppress the force applied to the defibrated material MB in the tube portion 41 due to the change in the acceleration of the tube portion 41. In this case, the effect of reducing the change in the MC amount of the first screening substance can be expected.

[2. Second Embodiment] Hereinafter, a second embodiment to which the present invention is applied will be described. In the first embodiment described above, an example has been described in which the speed VB of the tube portion 41 is adjusted by controlling the first sieve motor 40a by the drive control portion 152 during the startup operation. The second embodiment describes an example in which the drive control unit 152 adjusts the speed VD of the barrel portion 61 by controlling the second sieve motor 60a during the startup operation. In the second embodiment, the tube portion 61 corresponds to a sieve portion, the mixture MX selected by the tube portion 61 corresponds to a material, and the mesh belt 72 corresponds to a stacking portion. The second temperature and humidity detection unit 333 corresponds to a humidity detection unit.

[2-1. Forming Conditions of Second Mesh] Here, the forming conditions of the second mesh W2 formed by the second mesh forming portion 70 will be described with reference to FIG. 3. The thickness of the second mesh sheet W2 is determined based on the amount of the second mixture MX which is the material supplied to the mesh belt 72 and the amount of movement of the mesh belt 72 per unit time. The amount of movement of the mesh belt 72 per unit time is the speed VC.

As a factor determining the amount of the mixture MX supplied to the mesh belt 72, that is, the amount of the mixture MX passing through the opening 61a, a speed VD is given. The higher the speed VD, the more quickly the mixture MX in the barrel 61 is disassembled, so the mixture MX easily passes through the opening 61a. Also, the higher the speed VD, the easier the mixture MX passes through the opening 61a. Therefore, the faster the speed VD, the more the amount of the mixture MX passing through the opening 61a.

The amount of the mixture MX passing through the opening 61a varies when the cylinder 61 starts from the stopped state. In the tube portion 61, the fiber contained in the mixture MX causes friction between the fibers due to the rotation of the tube portion 61, so the mixture MX is charged. If the mixture MX is aggregated by the static electricity, it will be difficult to pass through the opening 61a. On the other hand, since the charge of the charged mixture MX is discharged while the tube portion 61 is stopped, the aggregation of the fibers contained in the mixture MX is released. Therefore, when the cylindrical portion 61 starts to rotate from the stopped state, that is, at the time of starting, the amount of the mixture MX passing through the opening 61 a temporarily increases.

The amount of the mixture MX passing through the opening 61 a is affected by the humidity in the tube portion 61. Here, humidity may be referred to as relative humidity. If the humidity in the tube portion 61 is low, the mixture MX is charged, and fiber aggregation is liable to occur. Therefore, the lower the humidity in the tube portion 61, the more the amount of the mixture MX passing through the opening 61a temporarily increases when the tube portion 61 starts to rotate from the stopped state, that is, when it starts.

The amount of the mixture MX passing through the opening 61a varies depending on the fiber length contained in the mixture MX. The short fibers easily pass through the opening 61a. Therefore, the shorter the fibers contained in the mixture MX, the greater the amount of the mixture MX passing through the opening 61a.

That is, the maximum factor that determines the amount of the mixture MX supplied from the tube portion 61 to the mesh belt 72 is the speed VD of the tube portion 61. In addition, as a factor that changes the amount of the mixture MX, whether the tube portion 61 is at the time of startup, the humidity in the tube portion 61, and the length of the fiber contained in the mixture MX are listed.

If the thickness of the second mesh sheet W2 is changed, a change in the amount of material supplied to the second mesh sheet forming section 70 in subsequent steps will affect the quality of the sheet S manufactured by the sheet manufacturing apparatus 100. Therefore, the sheet manufacturing apparatus 100 performs control to suppress the thickness variation of the second mesh W2 by the control unit 150. Since the control device 110 controls the thickness of the second mesh W2, the detection value of the second thickness detection unit 334 can be obtained. As shown in FIG. 4, the control device 110 can control the rotation speed of the second screen motor 60 a and the second belt motor 74 b.

[2-2. Operation of Sheet Manufacturing Device] The control unit 150 executes the operation shown in FIG. 6 by the drive control unit 152. In the setting processing of step ST1, the control unit 150 performs setting related to the operation of the second screen motor 60a. In this case, the control unit 150 sets the first to fifth speed conditions related to the speed VD of the barrel portion 61 by the setting process of FIG. 7. In the first embodiment, the first to fifth speed conditions are set to the speed VB of the tube portion 41, but the first to fifth speed conditions may be set to the speed VD of the tube portion 61.

The control unit 150 executes the setting processing of FIG. 7 on the speed VD. The control unit 150 determines whether there is a mixture MX inside the tube portion 61 (step ST21). The presence or absence of the mixture MX can also be determined based on the input of the touch sensor 117, for example.

When it is determined that there is no mixture MX inside the tube portion 61 (step ST21; No), the control unit 150 sets the first speed condition as a condition for accelerating the speed of the second sieve motor 60a (step ST22), and ends the setting process.

When it is determined that the mixture MX exists in the tube portion 61 (step ST21; Yes), the control unit 150 determines whether the humidity detected by the first temperature and humidity detection unit 323 is equal to or greater than the reference value contained in the reference value data 162 (step ST23). When the humidity is equal to or greater than the reference value (step ST23; Yes), the control unit 150 determines whether the length of the fiber contained in the mixture MX is equal to or greater than the reference value contained in the reference value data 162 (step ST24). Since the fiber contained in the mixture MX is from the raw material MA, it has the same length as the fiber contained in the defibrated material MB.

When the length of the fiber is equal to or greater than the reference value (step ST24; Yes), the control unit 150 sets the second speed condition as a condition for accelerating the speed of the second sieve motor 60a (step ST25), and ends the setting process. When the fiber length is shorter than the reference value (step ST24; No), the control unit 150 sets a third speed condition as a condition for accelerating the speed of the second screen motor 60a (step ST26), and ends the setting process.

On the other hand, when the humidity is lower than the reference value (step ST23; No), the control unit 150 determines whether the length of the fiber contained in the mixture MX is greater than the reference value contained in the reference value data 162 (step ST27).

When the fiber length is equal to or greater than the reference value (step ST27; Yes), the control unit 150 sets a fourth speed condition as a condition for accelerating the speed of the second sieve motor 60a (step ST28), and ends the setting process. When the length of the fiber is shorter than the reference value (step ST27; No), the control unit 150 sets a fifth speed condition as a condition for accelerating the speed of the second sieve motor 60a (step ST28), and ends the setting process.

The first to fifth speed conditions are basic conditions in a case where the speed VB is accelerated from zero when the barrel 61 is started, and include the target speed of the second screen motor 60a and the time until the target speed is reached or the acceleration of the second screen motor 60a.

The control related to the start of the speed VD can adopt the state shown in FIG. 8 to FIG. 12. That is, by using the speed VB shown in each of the graphs (1) of FIGS. 8 to 12 as the speed VD based on the detection value of the second sieve speed detection unit 331, it can be processed as speed-related data of the speed VD. Here, the target speed V1 of the speed VD may be the same as the target speed V1 of the speed VB, or may be a different speed.

The acceleration time under the second to fifth speed conditions can be similarly understood as the acceleration time related to the speed VD. The relationship between the length of the acceleration time under each speed condition is also the same as that of the first embodiment.

In the second embodiment, when the amount of the mixture MX lowered from the cylinder portion 61 to the mesh belt 72 is temporarily increased by the control of the control portion 150, the speed VD at the time of the activation of the cylinder portion 61 can be suppressed to control The thickness of the second mesh W2 varies. Thereby, in the step of manufacturing the sheet S by the sheet manufacturing apparatus 100, the amount of the mixture MX supplied to the subsequent steps of the second mesh forming portion 70 can be stabilized, and the quality variation of the sheet S can be suppressed. Therefore, it is possible to reduce the burden of the artificial adjustment work for suppressing the quality variation of the sheet S.

The first to fifth speed conditions for setting the speed VD may be the same as the first to fifth speed conditions described in the first embodiment, and the first to fifth speed conditions for optimizing the operation of the barrel portion 61 may also be used. .

As described above, the sheet manufacturing apparatus 100 to which the second embodiment of the present invention is applied includes the tube portion 61 that screens the mixture MX that is a material containing fibers; and the mesh belt 72 that accumulates the mixture MX discharged from the tube portion 61. The sheet manufacturing apparatus 100 includes each section of a manufacturing section 102 as a processing section that processes a material deposited on the mesh belt 72. In the sheet manufacturing apparatus 100, when the tube portion 61 is operated at the speed VD (first speed) during the operation of manufacturing the sheet S, and when the tube portion 61 is started from the stopped state, after the tube portion 61 is started, Start operation in a state where the operation is performed at a lower speed than the first speed. Here, the processing portion may be any one of the subsequent steps of the second mesh forming portion 70, and may be, for example, the forming portion 80 or the cutting portion 90.

The fiber processing apparatus according to the present invention and the sheet manufacturing apparatus 100 according to the second embodiment using the control method of the fiber processing apparatus are suitable when the amount of the mixture MX that moves from the cylinder portion 61 to the mesh belt 72 is likely to change, and is appropriate. The operating speed of the tube portion 61 is adjusted. This makes it possible to suppress variations in the amount of MX in the mixture. Therefore, since the thickness variation of the second mesh sheet W2 can be suppressed, in the step of manufacturing the sheet S by the sheet manufacturing apparatus 100, the amount of the mixture MX supplied to the subsequent steps of the second mesh sheet forming section 70 can be stabilized. For example, the quality variation of the sheet S can be suppressed, and the burden of an artificial adjustment operation for stabilizing the quality of the sheet S can be reduced.

The sheet manufacturing apparatus 100 may maintain the state in which the tube portion 61 is operated at a lower speed than the first speed during the start-up operation after the tube portion 61 is started, for a specific time. For example, as shown in the examples shown in FIGS. 9 to 12, the state in which the speed VD does not reach the first speed can be maintained. Thereby, when the amount of the mixture MX lowered from the cylinder portion 61 is likely to increase, the speed VD is maintained at a lower speed than the first speed, so the variation of the amount of the mixture MX can be effectively suppressed.

In addition, in the starting operation after the tube portion 61 is started, the sheet manufacturing apparatus 100 may operate the tube portion 61 such that the operation speed of the tube portion 61 is maintained at a second speed lower than the first speed for a specific time. In this case, by maintaining the speed VD at a certain speed lower than the first speed, it is possible to effectively suppress a change in the amount of the mixture MX moving from the cylinder portion 61 to the mesh belt 72.

In addition, the sheet manufacturing apparatus 100 may change the operating speed of the tubular portion 61 during the starting operation after the tubular portion 61 is started, so as to maintain the operating speed of the tubular portion 61 lower than the first speed for a specific time. For example, an operation such as changing the speed VD linearly as shown in the example of FIG. 11 or a non-linear change in the speed VD as shown in the example of FIG. 12 may be adopted. In these cases, since the speed VD is maintained below the first speed, it is possible to effectively suppress a change in the amount of the mixture MX that moves from the cylinder portion 61 to the mesh belt 72.

Moreover, in the sheet manufacturing apparatus 100, when the mixture MX exists in the cylindrical part 61, the cylindrical part 61 is started from a stopped state. In this case, the above-mentioned starting operation is performed. Thereby, the speed VD is controlled in a state where the amount of the mixture MX lowered from the cylinder portion 61 is likely to increase, thereby effectively suppressing the change in the amount of the mixture MX. In addition, in a state in which the amount of the mixture MX lowered from the cylinder portion 61 is not easily changed, a normal startup sequence is performed, so that it is possible to prevent a decrease in the manufacturing efficiency of the sheet S.

The sheet manufacturing apparatus 100 controls the operation of the tube section 61 by the control section 150. The control unit 150 operates the tube portion 61 based on the first speed during the manufacture of the sheet S. After the tubular portion 61 is activated, the tubular portion 61 is operated for a specific time based on a set speed lower than the first speed. The set speed corresponds to the intermediate speed V2 when the control of FIG. 9 is applied in the second embodiment, and corresponds to the intermediate speeds V4 and V5 in the example of FIG. 10. In this case, by controlling the speed VD to be lower than the first speed, it is possible to effectively suppress a change in the amount of the mixture MX moving from the cylinder portion 61 to the mesh belt 72.

The sheet manufacturing apparatus 100 includes a second temperature and humidity detection unit 333 that detects humidity. The control unit 150 controls the setting speed in accordance with the humidity information detected by the second temperature and humidity detection unit 333. Therefore, it is possible to appropriately respond to changes in the amount of MX in the mixture due to changes in humidity, and to effectively suppress changes in the amount of MX in the mixture. For example, as described above, the higher the humidity in the tube portion 61, the smaller the variation in the amount of the mixture MX passing through the opening 61a. In addition, if the humidity in the tube portion 61 is low, the charging of the fibers contained in the mixture MX is not easy to ease, and agglomeration of the fibers is likely to occur, so that the amount of the fiber agglomeration is released. Therefore, the lower the humidity in the tube portion 61, the larger the variation in the amount of the mixture MX passing through the opening 61a. For example, when the humidity in the barrel 61 can be detected or estimated by the detection value of the second temperature and humidity detection unit 333, the speed can be controlled according to the humidity in the barrel 61 to set the speed to appropriately respond to the effects of humidity. Changes in the amount of mixture MX.

In addition, the cylindrical portion 61 is formed in a cylindrical shape, an opening is provided in a peripheral surface of the cylindrical portion 61, and the cylindrical portion 61 is rotated around the axis of the cylindrical body. Therefore, if the cylinder portion 61 is started in a state where the mixture MX is present inside the cylinder portion 61, the amount of the mixture MX dropped to the mesh belt 72 at the time of startup is likely to change. In this configuration, a period during which the barrel portion 61 is rotated at a lower speed than the first speed is ensured by the control of the control unit 150, so that fluctuation in the amount of the mixture MX can be suppressed.

The sheet manufacturing apparatus 100 to which the fiber raw material regeneration device of the present invention is applied is provided with a defibrating section 20 as a miniaturizing section for miniaturizing the fiber-containing raw material MA. The sheet manufacturing apparatus 100 includes a tube portion 61 that screens the mixture MX that has been refined by the miniaturization portion, and a mesh belt 72 that is a stacking portion that accumulates the mixture MX discharged from the tube portion 61. The sheet manufacturing apparatus 100 includes each section of the manufacturing section 102 as a processing section that processes the mixture MX deposited on the mesh belt 72. In addition, the sheet manufacturing apparatus 100 operates the tube portion 61 at the first speed during the manufacturing of the sheet S, that is, the processing of the processing portion. In the sheet manufacturing apparatus 100, when the tube portion 61 is activated from the stopped state in the state where the mixture MX exists in the tube portion 41, after the tube portion 61 is started, the tube portion 61 is executed at a lower speed than the first speed. The starting action of the action state. According to this configuration, in a state in which the amount of the mixture MX moved from the cylindrical portion 61 is easily changed, by changing the speed of the cylindrical portion 61 to a lower speed than the first speed, it is possible to suppress a change in the amount of the mixture MX.

In the second embodiment, the aspect of changing the speed VD of the tube portion 61 is not limited to the examples shown in FIGS. 9 to 12. For example, the speed VD may be made higher than the first speed after the tube portion 61 is started. Specifically, the control unit 150 may also be configured to accelerate the speed VD to a higher speed than the first speed when the barrel portion 61 is activated, and to maintain the barrel portion 61 different from the first speed at a specific time after the acceleration is completed. 1 speed speed VD operation status. As described above, in the starting operation, when the first operation including increasing the acceleration of the tube portion 61 with time and the second operation of decreasing the acceleration of the tube portion 61 after the elapse of the time are performed, the tube is made by The speed change of the portion 61 is appropriate, and the change in the amount of the mixture MX can be reduced. For example, by controlling the change in the acceleration of the tube portion 61 with the control portion 150, it is possible to suppress the force applied to the mixture MX in the tube portion 61 due to the change in the acceleration of the tube portion 61. In this case, the effect of reducing the change in the amount of MX in the mixture can be expected.

[3. Other Embodiments] The above embodiments are only specific aspects of implementing the present invention described in the scope of the patent application, and are not intended to limit the present inventor. As long as they do not depart from the gist, for example, the Implementation.

In the first embodiment described above, an example will be described in which the control unit 150 controls the speed of the barrel portion 41 by executing the setting process of FIG. 7 and starts the barrel portion 41 in step ST7 based on the set speed conditions. In the second embodiment, an example will be described in which the control unit 150 controls the speed of the barrel portion 61 by executing the setting process of FIG. 7 and starts the barrel portion 61 in step ST8 based on the set speed conditions. The present invention is not limited to these embodiments. For example, the control unit 150 may also control the speed of each of the barrel portions 41 and 61 (that is, the speed control of the first sieve motor 40a and the second sieve motor 60a). Set processing. In this case, based on the set speed condition, the control unit 150 activates the tube portion 41 (in other words, the first sieve motor 40a) in step ST7, and starts the tube portion 61 (in other words, the second sieve motor 60a) in step ST8. That is, the control unit 150 may be a controller applying the present invention to both the speed VB of the tube portion 41 and the speed VD of the tube portion 61.

In each of the above embodiments, the mesh belt 46 and the mesh belt 72 corresponding to the stacking section are described as mesh belts having openings. The present invention is not limited to this, and for example, a belt or a flat plate having no opening may be used as the stacking portion. The sieve portion is not limited to the cylindrical portions 41 and 61. For example, a disc-shaped screen having an opening may be used as the screen portion. In each of the embodiments described above, the position where the first temperature and humidity detection unit 323 is provided may not be the inside of the tube portion 41 or may be, for example, the inside of the case portion 43. Similarly, the 2nd temperature and humidity detection part 333 is not limited to the example provided in the cylindrical part 61, and may be provided in the case part 63. In addition, a temperature sensor or a sensor for detecting the moisture contained in the raw material MA may be provided in the supply unit 10. In this case, the control unit 150 may estimate based on the detected value of the temperature and / or moisture contained in the raw material MA. Humidity inside the tube portion 41 or inside the tube portion 61. In addition, a temperature and humidity sensor may be provided on the tubes 2 and 3 to detect the temperature and / or humidity before and after the defibrating section 20. In this case, the control unit 150 may estimate the humidity inside the tube portion 41 or the inside of the tube portion 61 based on changes in temperature and / or humidity before and after the defibrating portion 20 is processed. A temperature and humidity sensor may also be provided to detect the temperature and / or humidity inside the casing of the sheet manufacturing apparatus 100.

Further, in the second embodiment, when the present invention is applied to the stacking section 60 and the second mesh forming section 70, the screening section 40 may be replaced with a screening and separation of the defibrated material MB into the first screening material MC, Classifiers for the second screening object and the third screening object D. The classifier is, for example, a cyclone classifier, an elbow jet classifier, or a vortex classifier.

The specific configuration of the drive control unit 152 for controlling the speed of the first and second screen motors 40a and 60a is arbitrary, and the voltage of the driving current supplied to the first and second screen motors 40a and 60a may be changed. Control the number of rotations by other methods.

The sheet manufacturing apparatus 100 is not limited to the sheet S, and may be configured to manufacture a plate-like or net-like manufactured article composed of a hard sheet or a laminated sheet. The manufactured product is not limited to paper, and may be a non-woven fabric. The properties of the sheet S are not particularly limited, and may be paper that can be used as recording paper (for example, so-called PPC paper) for the purpose of notes or printing, or wallpaper, packaging paper, colored paper, drawing paper, Kent paper, and the like. When the sheet S is a non-woven fabric, it may be a fiberboard, a tissue paper, a kitchen paper, a cleaning paper, a filter paper, a liquid absorbing material, a sound absorbing body, a cushioning material, a mat, etc., in addition to a general non-woven fabric.

Further, in the above embodiment, as the fiber processing device and the fiber raw material regeneration device of the present invention, a dry sheet manufacturing device for obtaining a material by defibrating a raw material in a gas and using the material and a resin to describe the sheet S has been described. 100. The application object of the present invention is not limited to this, and a so-called wet sheet manufacturing apparatus that dissolves or floats a fiber-containing raw material in a solvent such as water and processes the raw material into a sheet can also be applied. In addition, it can also be applied to a sheet manufacturing device of an electrostatic method that adsorbs a material containing defibrated fibers in a gas on the surface of a cylinder by static electricity or the like, and processes the raw material adsorbed on the cylinder into a sheet.

10‧‧‧ Supply Department

12‧‧‧ Coarse crushed section

14‧‧‧ coarse knife

20‧‧‧Defibration Department (Miniaturization Department)

23‧‧‧ tube

27‧‧‧The first dust collection department

28‧‧‧The first capture blower

29‧‧‧ tube

40‧‧‧Screening Department

40a‧‧‧1st screen motor (drive unit, screen drive unit)

41‧‧‧Cylinder part (sieve part)

41a‧‧‧ opening

42‧‧‧ entrance

43‧‧‧Shell

44‧‧‧Exhaust

45‧‧‧The first mesh forming section

46‧‧‧Net belt (stacking section)

47‧‧‧tension roller

47a‧‧‧drive roller

47b‧‧‧1st belt motor

48‧‧‧Suction section

49‧‧‧rotating body

49a‧‧‧base

49b‧‧‧ protrusion

50‧‧‧ Mixing Department

52‧‧‧Additive Supply Department

52a‧‧‧Additive cassette

52b‧‧‧Additions removal section

52c‧‧‧Additive input department

56‧‧‧ Hybrid Blower

60‧‧‧Stacking Department

60a‧‧‧Second screen motor (drive unit, screen drive unit)

61‧‧‧Cylinder part (sieve part)

61a‧‧‧ opening

62‧‧‧Inlet

63‧‧‧shell

67‧‧‧The second dust collection department

68‧‧‧Second Capture Blower

70‧‧‧Second mesh forming section

72‧‧‧ Mesh belt (stacking section)

74‧‧‧Tension roller

74a‧‧‧Drive roller

74b‧‧‧ 2nd belt motor

76‧‧‧Suction mechanism

78‧‧‧Humidity control unit

79‧‧‧Transportation Department

79a‧‧‧net belt

79b‧‧‧roller

79c‧‧‧Suction mechanism

80‧‧‧forming department

90‧‧‧ cutting section

96‧‧‧Exhaust

100‧‧‧ Sheet manufacturing equipment (fiber material recycling equipment, fiber processing equipment)

101‧‧‧Defibrating treatment department

102‧‧‧Manufacturing Department

110‧‧‧control device

111‧‧‧ main processor

117‧‧‧touch sensor

120‧‧‧Non-volatile memory

150‧‧‧Control Department

151‧‧‧ Detection Control Department

152‧‧‧Drive Control Department

160‧‧‧Memory Department

161‧‧‧setting data

162‧‧‧ benchmark data

163‧‧‧Speed setting data

321‧‧‧The first sieve speed detection unit

322‧‧‧The first belt speed detection unit

323‧‧‧The first temperature and humidity detection unit (humidity detection unit)

324‧‧‧The first thickness detection section

331‧‧‧Second screen speed detection unit

332‧‧‧Second belt speed detection unit

333‧‧‧The second temperature and humidity detection section (humidity detection section)

334‧‧‧The second thickness detection section

D‧‧‧3rd screening

MA‧‧‧ Raw materials

MB‧‧‧ Defibrillator (material)

MC‧‧‧ 1st Screening (Materials)

MX‧‧‧mixture (material)

S‧‧‧ Sheet

VA‧‧‧speed

VB‧‧‧Speed

W1‧‧‧The first mesh

W2‧‧‧The second mesh

FIG. 1 is a schematic diagram showing the configuration of a sheet manufacturing apparatus. FIG. 2 is a diagram showing a schematic configuration of a screening section and a first mesh forming section. FIG. 3 is a diagram showing a schematic configuration of a stacking section and a second mesh forming section. FIG. 4 is an explanatory diagram showing a control system of a sheet manufacturing apparatus. Fig. 5 is a functional block diagram of the control device. FIG. 6 is a flowchart showing the operation of the sheet manufacturing apparatus. Fig. 7 is a flowchart showing the operation of the sheet manufacturing apparatus. FIG. 8 is a graph showing an example of changes in the operating speed of the tube portion and the thickness of the first mesh. FIG. 9 is a graph showing a variation example of the operating speed of the tube portion and the thickness of the first mesh. FIG. 10 is a graph showing an example of changes in the operating speed of the tube portion and the thickness of the first mesh. FIG. 11 is a graph showing an example of changes in the operating speed of the tube portion and the thickness of the first mesh. FIG. 12 is a graph showing an example of changes in the operating speed of the tube portion and the thickness of the first mesh.

Claims (9)

A fiber processing device includes: a sieve section that screens materials containing fibers; a stacking section that stacks the material discharged from the sieve section; and a processing section that processes the material stacked on the stacking section, And during the execution of the processing part, the sieve part is caused to move at the first speed. When the sieve part is started from a stopped state, after the sieve part is started, the sieve part is executed for a specific period of time. The above-mentioned first speed starts the operation at a lower speed. For example, in the fiber processing device of claim 1, during the start-up operation, the sieve portion is operated so that the operating speed of the sieve portion is maintained at a second speed lower than the first speed for a specific time. The fiber processing device according to claim 1 or 2, wherein the above-mentioned starting action includes: the first action of increasing the speed of the sieve part with time and increasing the speed per unit time; and The increase in speed per unit time is smaller than the second action of the first action described above. The fiber processing device according to any one of claims 1 to 3, wherein the sieve portion is started from a stopped state in a state where the material is present in the sieve portion. The fiber processing device according to any one of claims 1 to 4, further comprising a control unit that controls the operation of the sieve unit, and the control unit moves the sieve unit based on the first speed during the processing of the processing unit, and After the sieve portion is activated, the sieve portion is operated for a specific time based on a set speed lower than the first speed. The fiber processing device according to claim 5, further comprising a humidity detection unit, and the control unit controls the set speed based on the humidity information detected by the humidity detection unit. The fiber processing device according to any one of claims 1 to 6, wherein the sieve portion has a cylindrical shape, an opening is provided on a peripheral surface of the sieve portion, and the center is rotated around the axis of the cylinder. A fiber raw material regeneration device includes: a miniaturization section that miniaturizes a fiber-containing raw material; a sieve section that screens fines that have been miniaturized by the miniaturization section; a stacking section that is made from the sieve section The discharged fines are accumulated; and a processing unit is configured to process the fines accumulated in the accumulated portion, and during the processing of the processed portion, the sieve portion is operated at a first speed and is used in the sieve portion. In the case where the sieve part is activated from the stopped state in the state of the fine compound, the activation including the state in which the sieve part operates at a lower speed than the first speed is performed after the sieve part is activated for a specific period of time. action. A method for controlling a fiber processing device, comprising a sieve section that screens a material containing fibers, a stacking section that accumulates the material discharged from the sieve section, a processing section that processes the material stacked on the stacking section, And a fiber processing device of a driving part that moves the sieve part to discharge the material from the sieve part, during the processing of the processing part, causes the sieve part to operate at a first speed, and starts when the sieve part starts from a stopped state. In this case, after the sieve portion is activated, the sieve portion performs a start operation including a state in which the sieve portion operates at a lower speed than the first speed during a specific time period after the sieve portion is activated.