JP2015161048A - Sheet production apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet production apparatus capable of stably conveying fibers and resin.SOLUTION: The sheet production apparatus comprises: a fibrillation unit for fibrillating a material to be fibrillated comprising fibers in the air; a first supply unit for supplying a first additive to a fibrillated material fibrillated in the fibrillation unit; a second supply unit for supplying a second additive to the fibrillated material; a deposition unit for depositing the fibrillated material, the first additive and the second additive; a forming unit for heating a web deposited in the deposition unit to produce a sheet. The second additive adheres to a conveyance unit for conveying the fibrillated material more easily than the first additive. In the conveyance unit, the second supply unit is positioned on a downstream side in a conveying direction of the fibrillated material than the first supply unit.

Description

  The present invention relates to a sheet manufacturing apparatus.

  Conventionally, a plurality of additives such as heat-fusible substances and flame retardant substances are supplied to natural cellulose fibers and synthetic fibers, and these are mixed and defibrated in the air to form a mat, which is then heated. A liquid absorber formed in this manner is known (see, for example, Patent Document 1).

JP-A-9-158024

  However, when supplying a plurality of additives in the manufacturing process of the liquid absorber, the additives are charged by static electricity and adhere to the inside of the conveyance path, and the additive cannot be stably conveyed. There was a problem.

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

  [Application Example 1] A sheet manufacturing apparatus according to this application example includes a defibrating unit that defibrates a defibrated material containing fibers in air, and a defibrated material that has been defibrated by the defibrating unit. A first supply unit that supplies one additive, a second supply unit that supplies a second additive to the defibrated material, the defibrated material, the first additive, and the second addition. A sheet producing apparatus comprising: a depositing unit that deposits an article; and a molding unit that heats the web deposited in the depositing unit to produce a sheet, wherein the second additive is more effective than the first additive. The additive is more likely to adhere to the transport unit that transports the defibrated material, and in the transport unit, the second supply unit is more downstream in the transport direction of the defibrated material than the first supply unit. It is located on the side.

  According to this configuration, since the second supply unit that supplies the second additive that is more easily adhered to the transport unit than the first additive is located on the downstream side of the first supply unit, the second supply unit is transported from the upstream side. The second additive is swept away by the first additive or defibrated material. Thereby, especially the adhesion of the second additive to the conveying section can be reduced.

  [Application Example 2] A sheet manufacturing apparatus according to this application example includes a defibrating unit that defibrates an object to be defibrated including fibers, and a defibrated material that has been defibrated by the defibrating unit. A first supply unit that supplies one additive, a second supply unit that supplies a second additive to the defibrated material, the defibrated material, the first additive, and the second addition. A sheet manufacturing apparatus comprising: a deposition unit that deposits a product; and a molding unit that manufactures a sheet by heating a web deposited in the deposition unit, wherein the defibration unit transfers the defibration unit to the deposition unit. A transport unit that transports the product, and a first additive transport unit that is connected to the transport unit and transports the first additive, and the second supply unit is connected to the first additive transport unit The second additive is supplied, and the second additive is more likely to adhere to the first additive transport unit than the first additive. To.

  According to this structure, when the 2nd additive which adheres more easily with respect to a 1st additive conveyance part is supplied with respect to a 1st additive conveyance part, a 2nd additive is a 1st additive conveyance. Although it adheres to a part easily, a 2nd additive is pushed away to the conveyance part side with the 1st additive conveyed by the 1st additive conveyance part. Thereby, especially adhesion to the 1st additive conveyance part of the 2nd additive can be reduced.

  Application Example 3 A sheet manufacturing apparatus according to this application example includes a defibrating unit that defibrates a defibrated material containing fibers in air, and a defibrated material that has been defibrated by the defibrating unit. A first supply unit that supplies one additive, a transport unit that transports the defibrated material and the first additive, and a deposition unit that deposits the defibrated material and the first additive. And a forming unit that manufactures a sheet by heating the web accumulated in the accumulation unit, wherein the first additive is more defibrated than the defibrated material. It is easy to adhere to the conveyance part which conveys, and the said defibrated material pushes away the said 1st additive adhering to the said conveyance part in the said conveyance part.

  According to this structure, since the 1st additive which adheres more easily with respect to a conveyance part is washed away by the defibrated material, adhesion to the conveyance part of a 1st additive can be reduced.

Schematic which shows the structure of the sheet manufacturing apparatus concerning 1st Embodiment. Schematic which shows the operation | movement method of the sheet manufacturing apparatus concerning 1st Embodiment. Schematic which shows the structure of the sheet manufacturing apparatus concerning 2nd Embodiment. Schematic which shows the structure of the sheet manufacturing apparatus concerning 3rd Embodiment.

  Hereinafter, first, second and third embodiments of the present invention will be described with reference to the drawings. In the following drawings, the scale of each member or the like is shown differently from the actual scale so as to make each member or the like recognizable.

(First embodiment)
First, the configuration of the sheet manufacturing apparatus will be described. The sheet manufacturing apparatus is based on a technology for forming a raw material (defibrated material) Pu such as a pure pulp sheet or used paper on a new sheet Pr, for example. The sheet manufacturing apparatus according to the present embodiment supplies a first additive to a defibrating unit that defibrates a defibrated material containing fibers in air and a defibrated material that has been defibrated by the defibrating unit. A first supply unit that transports, a transport unit that transports the defibrated material and the first additive, a deposition unit that deposits the defibrated material and the first additive, and a web deposited in the deposition unit A sheet forming apparatus that manufactures a sheet, and the first additive is more likely to adhere to the transport unit that transports the defibrated material than the defibrated material. The defibrated material swept away the first additive adhering to the transport unit. Hereinafter, the configuration of the sheet manufacturing apparatus will be specifically described.

  FIG. 1 is a schematic diagram illustrating a configuration of a sheet manufacturing apparatus according to the present embodiment, and FIG. 2 is a schematic diagram illustrating an operation method of the sheet manufacturing apparatus. As shown in FIG. 1, the sheet manufacturing apparatus 1 of the present embodiment includes an input unit 10, a crushing unit 20, a defibrating unit 30, a classification unit 40, a sorting unit 50, and a first additive. A first supply unit 60 to supply, a deposition unit 70, a heating unit 150, and the like are provided. And the control part which controls these members is provided.

  The input unit 10 inputs the used paper Pu to the crushing unit 20. The input unit 10 includes, for example, a tray 11 that accumulates and stores a plurality of used paper Pu, and an automatic feeding mechanism 12 that can continuously input the used paper Pu in the tray 11 to the crushing unit 20. The used paper Pu to be input into the sheet manufacturing apparatus 1 is, for example, A4 size paper that is currently mainstream in the office.

  The crushing unit 20 cuts the supplied used paper Pu into pieces of several centimeters square. The crushing unit 20 includes a crushing blade 21 and constitutes an apparatus in which the cutting width of a normal shredder blade is widened. Thereby, the supplied used paper Pu can be easily cut into pieces of paper. The divided rough crushed paper is supplied to the defibrating unit 30 via the conveyance path 201.

  The defibrating unit 30 includes a rotating blade (not shown) that rotates, and performs defibrating to loosen the crushed paper (the material to be defibrated including fibers) supplied from the crushing unit 20 into fibers. . In this application, what is defibrated by the defibrating unit 30 is referred to as a defibrated material, and what has passed through the defibrating unit 30 is referred to as a defibrated material. In addition, the defibrating unit 30 of the present embodiment performs defibrating in a dry manner in the air. As a result of the defibrating process of the defibrating unit 30, the printed ink, toner, and the material applied to the paper such as the anti-bleeding material become fibers of several tens of μm or less (hereinafter referred to as “ink particles”). And separate. Therefore, the defibrated material that comes out from the defibrating unit 30 is fibers and ink particles obtained by defibrating a piece of paper. Then, the airflow is generated by the rotation of the rotary blade, and the fibers defibrated via the transport path 202 are carried on the airflow and conveyed to the classification unit 40 in the air. In addition, you may provide separately the airflow generation apparatus which produces | generates the airflow for making the defibrating part 30 convey the fiber disentangled via the conveyance path 202 to the classification part 40 as needed.

  The classifying unit 40 classifies the introduced material by airflow. In this embodiment, the defibrated material as the introduced material is classified into ink particles and fibers. The classification unit 40 can classify the conveyed fibers into ink particles and deinked fibers (deinked defibrated material), for example, by applying a cyclone. Note that other types of airflow classifiers may be used instead of the cyclone. In this case, as an airflow classifier other than the cyclone, for example, an elbow jet or an eddy classifier is used. The airflow classifier generates a swirling airflow, which is separated and classified by the difference in centrifugal force received depending on the size and density of the defibrated material, and the classification point can be adjusted by adjusting the speed and centrifugal force of the airflow. . As a result, the ink particles are divided into relatively small and low density ink particles and fibers larger than the ink particles and high density. Removing ink particles from fibers is called deinking.

  The classifying unit 40 of the present embodiment is a tangential input type cyclone, an introduction port 40 a introduced from the defibrating unit 30, a cylinder part 41 with the introduction port 40 a in the tangential direction, and a cone continuing to the lower part of the cylinder part 41. It is comprised from the part 42, the lower outlet 40b provided in the lower part of the cone part 42, and the upper exhaust port 40c for fine powder discharge | emission provided in the upper center of the cylinder part 41. As shown in FIG. The diameter of the conical portion 42 becomes smaller downward in the vertical direction.

  In the classification process, the airflow on which the defibrated material introduced from the introduction port 40a of the classification unit 40 is changed into a circumferential motion by the cylindrical part 41 and the conical part 42, and is subjected to centrifugal force and classified. Then, fibers larger than the ink particles and having a higher density move to the lower outlet 42, and relatively small and lower density ink particles are led to the upper exhaust port 40c as fine powder together with air, and deinking proceeds. Then, the short fiber mixture containing a large amount of ink particles is discharged from the upper exhaust port 40 c of the classification unit 40. Then, the short fiber mixture containing a large amount of discharged ink particles is collected in the receiving unit 80 via the conveyance path 206 connected to the upper exhaust port 40c of the classifying unit 40. On the other hand, a classified product containing fibers classified through the conveyance path 203 from the lower outlet 40 b of the classification unit 40 is conveyed in the air toward the sorting unit 50. From the classification unit 40 to the sorting unit 50, it may be transported by an air current when it is classified, or may be transported from the classification unit 40 located above to the sorting unit 50 located below by gravity. In addition, you may arrange | position the suction part etc. for sucking a short fiber mixture from the upper exhaust port 40c efficiently in the upper exhaust port 40c, the conveyance path 206, etc. of the classification part 40. FIG.

  The sorting unit 50 sorts the classified product including the fibers classified by the classifying unit 40 from the drum unit 51 having a plurality of openings. More specifically, the classified product including the fibers classified by the classifying unit 40 is sorted into a passing material that passes through the opening and a residue that does not pass through the opening. The sorting unit 50 according to the present embodiment includes a mechanism for dispersing the classified material in the air by rotational movement.

  Then, the passing material (defibrated material) that has passed through the opening by sorting by the sorting unit 50 is conveyed to the deposition unit 70. Specifically, the sorting unit 50 and the deposition unit 70 are connected by a transport path 204 as a transport unit. Then, the passing material (defibrated material) that has passed through the opening by sorting by the sorting unit 50 is received by the hopper unit 56 and then conveyed in the air to the deposition unit 70 via the conveyance path 204. The sorting unit 50 may be transported to the deposition unit 70 by a blower (not shown) that generates an air flow, or may be transported by gravity from the sorting unit 50 located above to the deposition unit 70 located below. On the other hand, the residue that has not passed through the opening due to the sorting by the sorting unit 50 is returned again to the defibrating unit 30 as a material to be defibrated via the conveying path 205 as a feeding path. Thereby, the residue is reused (reused) without being discarded.

  Here, the configuration of the first supply unit 60 will be described. As illustrated in FIG. 1, a first supply unit 60 that supplies a first additive to a passing material (defibrated material) to be transported is provided between the sorting unit 50 and the deposition unit 70 in the transport path 204. Has been placed. As the first additive, in addition to a resin (for example, a fusion resin or a thermosetting resin), for example, a flame retardant, a whiteness improver, a sheet strength enhancer, a sizing agent, and the like. The form of the first additive may be a powder or a fibrous body. Then, the first additive is stored in the additive storage unit 61 provided in the first supply unit 60.

  Next, an operation method of the sheet manufacturing apparatus will be described. In detail, the operation | movement method concerning the 1st supply part 60 is demonstrated. As shown in FIG. 2, the first additive T1 is discharged by a discharge mechanism such as a screw feeder provided in the additive reservoir 61 of the first supply unit 60, and the discharged first additive T1 is supplied. It is supplied from the port 62 toward the conveyance path 204. And the defibrated material F and the 1st additive T1 conveyed from the upstream of the selection part 50 in the conveyance path 204 merge, and the mixture which the defibrated material F and the 1st additive T1 mixed accumulates. It is conveyed toward the part 70 side.

  More specifically, in the defibrated material F and the first additive T1, the first additive T1 is more likely to adhere to the conveyance path 204 that conveys the defibrated material F. However, as shown in FIG. 2, the first additive T1 attached to the conveyance path 204 is swept away by the defibrated material F that is less likely to adhere to the conveyance path 204 than the first additive T1. In this way, adhesion of the first additive T1 to the conveyance path 204 is reduced, and the first additive T1 can be stably conveyed.

  In addition, the comparison method of the ease of attachment of the defibrating part F and the 1st additive T1 with respect to the conveyance path 204 can be set suitably. For example, each of the defibrating unit F and the first additive T1 can be transported to the transport path 204, and at that time, for example, it can be compared by the amount of adhesion that is charged by static electricity and adheres to the transport path 204. Moreover, as another method, the adhesion force with respect to each conveyance path 204 of the defibrating part F and the 1st additive T1 is measured with various adhesion force measuring apparatuses etc., and the defibrating part F and the 1st additive It is also possible to quantitatively compare the adhesion force with T1. In addition, since the adhesion state of the defibrating part F and the 1st additive T1 with respect to the conveyance path 204 changes with the materials, surface shape, surface treatment state, etc. of the conveyance path 204, it is with the change of the form of the conveyance path 204. It is preferable to perform adhesion evaluation.

  Returning to FIG. 1, the depositing unit 70 forms a web W by depositing a passing material (defibrated material) containing fibers introduced from the conveyance path 204 and an additive (first additive T1). It is. The depositing unit 70 has a mechanism for uniformly dispersing the fibers in the air and a mechanism for depositing the dispersed fibers on the mesh belt 73.

  First, as a mechanism for uniformly dispersing the fibers in the air, the depositing unit 70 is provided with a forming drum 71 into which the fibers and the resin are charged. The resin (additive) can be uniformly mixed in the passing material (fiber) by rotating the forming drum 71. The forming drum 71 is provided with a screen having a plurality of small holes. Then, the forming drum 71 is rotationally driven to uniformly mix the resin (additive) in the passing material (fiber) and to uniformly disperse the fiber and the fiber-resin mixture that have passed through the small holes in the air. Can do.

  Below the forming drum 71, an endless mesh belt 73 in which a mesh stretched by a stretch roller 72 is formed is disposed. The mesh belt 73 is moved in one direction by rotating at least one of the stretching rollers 72.

  In addition, a suction device 75 as a suction unit that generates an airflow directed vertically downward is provided below the forming drum 71 via a mesh belt 73. The suction device 75 can suck the fibers dispersed in the air onto the mesh belt 73.

  The fibers and the like that have passed through the small hole screen of the forming drum 71 are deposited on the mesh belt 73 by the suction force of the suction device 75. At this time, by moving the mesh belt 73 in one direction, it is possible to form a web W that includes fibers and resin and is deposited in a long shape. By continuously dispersing from the forming drum 71 and moving the mesh belt 73, a continuous belt-like web W is formed. The mesh belt 73 may be made of metal, resin, or non-woven fabric, and may be any material as long as fibers can be deposited and an air stream can pass therethrough. Note that if the mesh hole diameter of the mesh belt 73 is too large, fibers enter between the meshes, resulting in unevenness when the web W (sheet) is formed. On the other hand, if the mesh hole diameter is too small, the suction device 75. It is difficult to form a stable airflow. For this reason, it is preferable to adjust the hole diameter of a mesh suitably. The suction device 75 can be configured by forming a sealed box with a window of a desired size opened under the mesh belt 73, and sucking air from other than the window to make the inside of the box have a negative pressure from the outside air. In addition, the web W concerning this embodiment means the structure form of the object containing a fiber and resin. Accordingly, the web is shown as a web even when the shape or the like is changed when the web W is heated, pressurized, cut or conveyed.

  The web W formed on the mesh belt 73 is transported by the transport unit 100. The conveyance unit 100 according to the present embodiment illustrates a conveyance process of the web W from when the mesh belt 73 is finally put into the stacker 160 as a sheet Pr (web W). Therefore, in addition to the mesh belt 73, various rollers and the like function as a part of the transport unit 100. As the transport unit, there may be at least one of a transport belt, a transport roller, and the like. Specifically, first, the web W formed on the mesh belt 73 which is a part of the transport unit 100 is transported according to the transport direction (arrow in the figure) by the rotational movement of the mesh belt 73. Next, the web W is conveyed from the mesh belt 73 according to the conveyance direction (arrow in the figure).

  A pressure unit is disposed on the downstream side of the deposition unit 70 in the web W conveyance direction. In addition, the pressurization part of this embodiment is the pressurization part 140 which has the roller 141 which pressurizes the web W. FIG. By passing the web W between the roller 141 and the stretching roller 72, the web W can be pressurized. Thereby, the strength of the web W can be improved.

  On the downstream side of the pressure unit 140 in the conveyance direction of the web W, a roller 120 in front of the cutting unit is disposed. The front cutting unit roller 120 has a pair of rollers 121. One of the pair of rollers 121 is a drive control roller, and the other is a driven roller.

  Further, a one-way clutch is used for a drive transmission unit that rotates the front cutting unit roller 120. The one-way clutch has a clutch mechanism that transmits rotational force only in one direction, and is configured to idle in the opposite direction. As a result, when an excessive tension is applied to the web W due to the speed difference between the post-cutting section roller 125 and the pre-cutting section roller 120, the web W is idled on the pre-cutting section roller 120 side, so that the tension on the web W is suppressed. The web W can be prevented from being torn off.

  A cutting unit 110 that cuts the web W in a direction that intersects the transport direction of the web W to be transported is disposed on the downstream side of the front roller 120 in the transport direction of the web W. The cutting unit 110 includes a cutter, and cuts the continuous web W into sheets (sheets) according to a cutting position set to a predetermined length. For the cutting unit 110, for example, a rotary cutter can be applied. According to this, it becomes possible to cut while conveying the web W. Accordingly, since the conveyance of the web W is not stopped at the time of cutting, the manufacturing efficiency can be improved. The cutting unit 110 may apply various cutters in addition to the rotary cutter.

  A cutting portion rear roller 125 is disposed downstream of the cutting portion 110 in the web W conveyance direction. The cutting portion rear roller 125 has a pair of rollers 126. One of the pair of rollers 126 is a drive control roller, and the other is a driven roller.

  In the present embodiment, tension can be applied to the web W due to the speed difference between the roller 120 before the cutting unit and the roller 125 after the cutting unit. And it is comprised so that the cutting part 110 may be driven in the state with tension applied to the web W, and the web W may be cut | disconnected.

  A heating unit 150 that heats the web W is disposed on the downstream side of the cutting unit rear roller 125 in the conveyance direction of the web W. The heating unit 150 of the present embodiment is provided with a pair of heating and pressing rollers 151 that heat and press the web W. The heating unit 150 binds (fixes) the fibers included in the web W through a resin. A heating member such as a heater is provided at the center of the rotating shaft of the heating and pressing roller 151, and the web W being conveyed is heated by passing the web W between the pair of heating and pressing rollers 151. Can be pressurized. The web W is heated and pressed by the pair of heating and pressing rollers 151, so that the resin melts and becomes easily entangled with the fibers, and the fiber interval is shortened and the contact point between the fibers is increased. Thereby, a density increases and the intensity | strength as the web W improves. In addition, the heating part 150 of this embodiment is a part of the shaping | molding part 200 which heats the web W deposited by the deposition part 70 and shape | molds the sheet | seat Pr.

  A rear cutting unit 130 that cuts the web W along the conveyance direction of the web W is disposed downstream of the heating unit 150 in the conveyance direction of the web W. The rear cutting unit 130 includes a cutter and cuts according to a predetermined cutting position in the conveyance direction of the web W. Thereby, a sheet Pr (web W) having a desired size is formed. Then, the cut sheet Pr (web W) is stacked on the stacker 160 or the like.

  In addition, the sheet | seat concerning the said embodiment mainly says what used the thing containing fibers, such as used paper and a pure pulp, as a raw material, and was made into the sheet form. However, the shape is not limited to that, and may be a board shape or a web shape (or a shape having irregularities). The raw material may be plant fibers such as cellulose, chemical fibers such as PET (polyethylene terephthalate) and polyester, and animal fibers such as wool and silk. In the present application, the sheet is divided into paper and non-woven fabric. The paper includes a thin sheet form, and includes recording paper for writing and printing, wallpaper, wrapping paper, colored paper, Kent paper, and the like. Nonwoven fabrics are thicker or lower in strength than paper and include nonwoven fabrics, fiber boards, tissue paper, kitchen paper, cleaners, filters, liquid absorbents, sound absorbers, cushioning materials, mats, and the like.

  In the above embodiment, the used paper mainly refers to printed paper. However, if used as a raw material, it is regarded as used paper regardless of whether it is used.

  As mentioned above, according to the said embodiment, the following effects can be acquired.

  Since the first additive T1 that is more likely to adhere to the conveyance path 204 is swept away by the defibrated material F, the adhesion of the first additive T1 to the conveyance path 204 can be reduced.

(Second Embodiment)
Next, the configuration of the sheet manufacturing apparatus according to the second embodiment will be described. The sheet manufacturing apparatus according to the present embodiment supplies a first additive to a defibrating unit that defibrates a defibrated material containing fibers in air and a defibrated material that has been defibrated by the defibrating unit. A first supply unit, a second supply unit that supplies the second additive to the defibrated material, a deposition unit that deposits the defibrated material, the first additive, and the second additive, A sheet manufacturing apparatus comprising: a forming unit that manufactures a sheet by heating the web accumulated in the unit, wherein the second additive transports the defibrated material rather than the first additive The second supply unit is located on the downstream side in the conveyance direction of the defibrated material in the conveyance unit.

  FIG. 3 is a schematic diagram showing the configuration of the sheet manufacturing apparatus according to the present embodiment. In addition, the sheet manufacturing apparatus 1a of embodiment adds the 2nd supply part 60a to the structure of the sheet manufacturing apparatus 1 concerning 1st Embodiment. Therefore, since the configuration other than the second supply unit 60a is the same as the configuration of the sheet manufacturing apparatus 1 according to the first embodiment, the description thereof will be omitted, and the configurations of the first supply unit 60 and the second supply unit 60a will be mainly described below. explain.

  As shown in FIG. 3, between the sorting unit 50 and the stacking unit 70 in the conveyance path 204 as the conveyance unit of the sheet manufacturing apparatus 1a of the present embodiment, The 1st supply part 60 which supplies 1 additive T1, and the 2nd supply part 60a which supplies the 2nd additive T2 to the passing material (defibrated material) conveyed are provided. The first additive T1 or the second additive T2 is a resin (for example, a fusion resin or a thermosetting resin), a flame retardant, a whiteness improver, a sheet strength enhancer, a sizing agent, or the like. The form of the first additive T1 and the second additive T2 may be a powder or a fibrous body.

  The first supply unit 60 includes an additive storage unit 61 that stores the first additive T1. Further, the additive storage unit 61 is provided with a discharge mechanism such as a screw feeder. Then, the first additive T1 is discharged from the discharge mechanism of the additive storage unit 61 toward the supply port 62, and the discharged first additive T1 is supplied to the transport path 204. . Moreover, the 2nd supply part 60a is provided with the additive storage part 61a which stores the 2nd additive T2. Further, the additive storage unit 61a is provided with a discharge mechanism such as a screw feeder. And it is comprised so that the 2nd additive T2 may be discharged | emitted from the discharge mechanism of the additive storage part 61a toward the supply port 62a, and the discharged 2nd additive T2 may be supplied to the conveyance path 204. .

  In the present embodiment, the second additive T2 is more likely to adhere to the conveyance path 204 that conveys the defibrated material than the first additive T1. And the 2nd supply part 60a which supplies the 2nd additive T2 rather than the 1st supply part 60 which supplies the 1st additive T1 is in the downstream of the conveyance direction of the defibrated material in the conveyance path 204. positioned. Here, a method of comparing the ease of adhesion of the first additive T1 and the second additive T2 to the transport path 204 can be set as appropriate. For example, each of the first additive T1 and the second additive T2 is transported to the transport path 204, and at that time, for example, it can be compared by the amount of adhesion that is charged by the static electricity and adheres to the transport path 204. . As another method, the adhesion of the first additive T1 and the second additive T2 to the respective conveyance paths 204 is measured by various adhesion force measuring devices or the like, and the first additive T1 and the first additive T1 It is also possible to quantitatively compare the adhesive strength with the two additives T2. In addition, since the adhesion state of the 1st additive T1 and the 2nd additive T2 with respect to the conveyance path 204 changes with the materials, surface shape, surface treatment state, etc. of the conveyance path 204, it changes the form of the conveyance path 204. Accordingly, it is preferable to perform adhesion evaluation.

  Next, an operation method of the sheet manufacturing apparatus will be described. In detail, the operation | movement method concerning the 1st supply part 60 and the 2nd supply part 60a is demonstrated. As shown in FIG. 3, the first additive T1 is discharged by the discharge mechanism of the additive storage unit 61 of the first supply unit 60, and the discharged first additive T1 is transferred from the supply port 62 to the conveyance path 204. Supplied. And the defibrated material F and the 1st additive T1 conveyed from the upstream of the selection part 50 in the conveyance path 204 merge, and the mixture which the defibrated material F and the 1st additive T1 mixed accumulates. It is conveyed toward the part 70 side.

  Next, the second additive T2 comes from the discharge mechanism of the additive reservoir 61a of the second supply unit 60a disposed downstream of the first supply unit 60 in the conveyance direction of the defibrated material F in the conveyance path 204. Discharged. The discharged second additive T2 is supplied from the supply port 62a toward the transport path 204. And it joins with the mixture of the defibrated material F and the 1st additive T1 conveyed from the upstream of the selection part 50 in the conveyance path 204, and the defibrated material F, the 1st additive T1, and the 2nd addition The mixture in which the object T2 is mixed is conveyed toward the deposition unit 70 side.

  Here, the second additive T2 is more likely to adhere to the transport path 204 than the first additive T1. However, as shown in FIG. 3, the second additive T2 that tends to adhere to the transport path 204 is swept away by the first additive T1 that is less likely to adhere to the transport path 204 than the second additive T2.

  As mentioned above, according to the said embodiment, the following effects can be acquired.

  Since the second supply unit 60a that supplies the second additive T2 that easily adheres to the conveyance path 204 compared to the first additive T1 is located on the downstream side, the first additive T1 conveyed from the upstream side. The second additive T2 is washed away by the defibrated material F. Therefore, adhesion of the second additive T2 to the conveyance path 204 is reduced, and the second additive T2 can be stably conveyed together with the defibrated material F and the first additive T1.

(Third embodiment)
Next, the configuration of the sheet manufacturing apparatus according to the third embodiment will be described. The sheet manufacturing apparatus according to the present embodiment supplies a first additive to a defibrating unit that defibrates a defibrated material containing fibers in air and a defibrated material that has been defibrated by the defibrating unit. A first supply unit, a second supply unit that supplies the second additive to the defibrated material, a deposition unit that deposits the defibrated material, the first additive, and the second additive, A sheet forming apparatus comprising: a forming unit that heats the web accumulated in the unit to produce a sheet; and a conveying unit that conveys the defibrated material from the defibrating unit to the accumulating unit, and connected to the conveying unit A first additive transport unit that transports the first additive, and the second supply unit supplies the second additive to the first additive transport unit, and is second than the first additive. The additive of No. 2 is more likely to adhere to the first additive transport unit.

  FIG. 4 is a schematic diagram showing the configuration of the sheet manufacturing apparatus according to the present embodiment. In addition, the sheet manufacturing apparatus 1b of this embodiment adds the 2nd supply part 60a to the structure of the sheet manufacturing apparatus 1 concerning 1st Embodiment. Therefore, since the configuration other than the second supply unit 60a is the same as the configuration of the sheet manufacturing apparatus 1 according to the first embodiment, the description thereof will be omitted, and the configurations of the first supply unit 60 and the second supply unit 60a will be mainly described below. explain.

  As shown in FIG. 4, the conveyance path 204 and the first additive T1 are supplied between the sorting unit 50 and the stacking unit 70 in the conveyance path 204 as the conveyance unit of the sheet manufacturing apparatus 1b of the present embodiment. A first additive transport path 208 serving as a first additive transport unit that connects the first supply unit 60 is disposed. The first additive transport path 208 is connected to a second supply unit 60a that supplies the second additive T2 to the first additive transport path 208. The first additive T1 or the second additive T2 is a resin (for example, a fusion resin or a thermosetting resin), a flame retardant, a whiteness improver, a sheet strength enhancer, a sizing agent, or the like. The form of the first additive T1 and the second additive T2 may be a powder or a fibrous body.

  The first supply unit 60 includes an additive storage unit 61 that stores the first additive T1. Further, the additive storage unit 61 is provided with a discharge mechanism such as a screw feeder. Then, the first additive T1 is discharged from the discharge mechanism of the additive reservoir 61 to the supply port 62. The discharged first additive T1 is configured to be supplied from the supply port 62 toward the transport path 204 via the first additive transport path 208. Moreover, the 2nd supply part 60a is provided with the additive storage part 61a which stores the 2nd additive T2. Further, the additive storage unit 61a is provided with a discharge mechanism such as a screw feeder. A supply port 62a is disposed corresponding to the additive reservoir 61a, and a conveyance path 209 is provided in the supply port 62a. The supply port 62a and the first additive transport path 208 are connected by the transport path 209. Then, the second additive T2 is discharged from the discharge mechanism of the additive reservoir 61a toward the supply port 62a, and the discharged second additive T2 is discharged to the first additive transport path 208 via the transport path 209. It is comprised so that it may supply toward.

  In the present embodiment, the second additive T2 is more likely to adhere to the first additive transport path 208 than the first additive T1. The supply position for supplying the second additive T2 is downstream of the supply position for supplying the first additive T1 in the transport direction of the first additive T1 in the first additive transport path 208. Is located. Here, a method of comparing the ease of adhesion of the first additive T1 and the second additive T2 to the transport path 204 can be set as appropriate. For example, each of the first additive T1 and the second additive T2 is transported to the transport path 204, and at that time, for example, it can be compared by the amount of adhesion that is charged by the static electricity and adheres to the transport path 204. . As another method, the adhesion of the first additive T1 and the second additive T2 to the respective conveyance paths 204 is measured by various adhesion force measuring devices or the like, and the first additive T1 and the first additive T1 It is also possible to quantitatively compare the adhesive strength with the two additives T2. In addition, since the adhesion state of the 1st additive T1 and the 2nd additive T2 with respect to the conveyance path 204 changes with the materials, surface shape, surface treatment state, etc. of the conveyance path 204, it changes the form of the conveyance path 204. Accordingly, it is preferable to perform adhesion evaluation.

  Next, an operation method of the sheet manufacturing apparatus will be described. In detail, the operation | movement method concerning the 1st supply part 60 and the 2nd supply part 60a is demonstrated. As shown in FIG. 4, the first additive T1 is discharged by the discharge mechanism of the additive storage unit 61 of the first supply unit 60, and the discharged first additive T1 is supplied from the supply port 62 to the first additive. It is supplied toward the conveyance path 208. Further, the second additive T2 is discharged by the discharge mechanism of the additive storage unit 61a of the second supply unit 60a, and the discharged second additive T2 is discharged via the transfer path 209 to the first additive transfer path 208. Supplied towards Then, the first additive T1 and the second additive T2 conveyed from the upstream side of the first supply unit 60 in the first additive conveyance path 208 merge, and the first additive T1 and the second additive T2 merge. The mixture in which the additive T2 is mixed is conveyed toward the conveyance path 204 side. Thereafter, the defibrated material F and the mixture of the first additive T1 and the second additive T2 conveyed from the upstream side of the sorting unit 50 at the connection position of the first additive conveying path 208 and the conveying path 204 are The mixture is joined, and the mixture of the defibrated material F, the first additive T1, and the second additive T2 is conveyed toward the deposition unit 70 side.

  Here, the second additive T2 is more likely to adhere to the first additive transport path 208 than the first additive T1. However, as shown in FIG. 4, the second additive that tends to adhere to the first additive transport path 208 by the first additive T1 that is less likely to adhere to the first additive transport path 208 than the second additive T2. The additive T2 is washed away.

  As mentioned above, according to the said embodiment, the following effects can be acquired.

  Since the position for supplying the second additive T2 that tends to adhere to the first additive transport path 208 compared to the first additive T1 is on the downstream side, the second additive T1 transported from the upstream side causes the second additive T1 to be transported from the upstream. The additive T2 is washed away. Therefore, the adhesion of the second additive T2 to the first additive transport path 208 is reduced, and the second additive T2 can be transported stably.

  The present invention is not limited to the above-described embodiment, and various modifications and improvements can be added to the above-described embodiment. A modification will be described below.

  (Modification 1) In the second and third embodiments, the configuration in which the two additives of the first additive T1 and the second additive T2 are supplied has been described. However, the present invention is not limited to this configuration. For example, the structure which supplies three or more additives may be sufficient. In this case, for example, the ease of adhering to the conveyance path 204 is relatively compared, and the supply position of the additive that is more likely to adhere to the conveyance path 204 is arranged further downstream in the conveyance direction of the defibrated material F. . In this way, the additive that easily adheres to the conveyance path 204 is swept away by the additive that does not easily adhere to the conveyance path 204 conveyed from the upstream side. Thereby, the additive which tends to adhere to the conveyance path 204 can be stably conveyed.

  DESCRIPTION OF SYMBOLS 1,1a, 1b ... Sheet manufacturing apparatus, 10 ... Input part, 20 ... Crushing part, 30 ... Defibration part, 40 ... Classification part, 50 ... Sorting part, 60 ... 1st supply part, 60a ... 2nd supply part 61, 61a ... Additive storage part, 62, 62a ... Supply port, 70 ... Deposition part, 100 ... Conveying part, 150 ... Heating part, 200 ... Molding part, 204 ... Conveying path as conveying part, 208 ... First Additive transport path.

Claims (3)

A defibrating unit for defibrating a fiber to be defibrated in the air;
A first supply unit that supplies a first additive to the defibrated material that has been defibrated in the defibrating unit;
A second supply unit for supplying a second additive to the defibrated material;
A deposition section for depositing the defibrated material, the first additive, and the second additive;
A sheet manufacturing apparatus comprising: a molding unit that manufactures a sheet by heating the web accumulated in the accumulation unit,
The second additive is more likely to adhere to the transport unit that transports the defibrated material than the first additive,
In the transport unit, the sheet supply apparatus is characterized in that the second supply unit is positioned downstream of the first supply unit in the transport direction of the defibrated material. A defibrating unit for defibrating a fiber to be defibrated in the air;
A first supply unit that supplies a first additive to the defibrated material that has been defibrated in the defibrating unit;
A second supply unit for supplying a second additive to the defibrated material;
A deposition section for depositing the defibrated material, the first additive, and the second additive;
A sheet manufacturing apparatus comprising: a molding unit that manufactures a sheet by heating the web accumulated in the accumulation unit,
A transport unit that transports the defibrated material from the defibrating unit to the deposition unit;
A first additive transport unit connected to the transport unit and transporting the first additive,
The second supply unit supplies the second additive to the first additive transport unit,
The sheet manufacturing apparatus according to claim 1, wherein the second additive is more likely to adhere to the first additive transport unit than the first additive. A defibrating unit for defibrating a fiber to be defibrated in the air;
A first supply unit that supplies a first additive to the defibrated material that has been defibrated in the defibrating unit;
A transport unit for transporting the defibrated material and the first additive;
A deposition part for depositing the defibrated material and the first additive;
A sheet manufacturing apparatus comprising: a molding unit that manufactures a sheet by heating the web accumulated in the accumulation unit,
The first additive is more likely to adhere to the transport unit that transports the defibrated material than the defibrated material,
In the conveyance unit, the defibrated material pushes away the first additive adhering to the conveyance unit.

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