JP2015196930A - Sheet manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet manufacturing device for increasing the efficiency of a mixing process of chopped strand glass fiber and resin in a mixing part.SOLUTION: A sheet manufacturing device includes a mixing part 300 for mixing at least fiber and resin, and a molding part for molding a sheet using a mixture mixed in the mixing part 300. The mixing part 300 has a rotating part 310, a housing part 380 surrounding the rotating part 310, and a projecting part 370 projecting inward at a position facing the rotating part 310 in the housing part 380.

Description

  The present invention relates to a sheet manufacturing apparatus.

  Conventionally, a method of forming a composite product by mixing chopped strand glass fibers and a resin with a blower is known (for example, see Patent Document 1).

Special table 2007-508964

  However, in a blower provided with blades in the housing, when mixing the chopped strand glass fibers and the resin, there is a problem that sufficient mixing cannot be obtained simply by rotating the blades.

  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 mixing unit that mixes at least fibers and a resin, and a forming unit that forms a sheet using the mixture mixed in the mixing unit. The mixing portion includes a rotating portion, a housing portion that surrounds the rotating portion, and a protrusion that protrudes inward at a position facing the rotating portion in the housing portion. .

  According to this configuration, the fiber and the resin collide with the protrusion inside the housing portion when flowing due to the rotation of the rotating portion. As a result, the fibers and the resin can be easily dispersed and mixed.

  Application Example 2 The rotating unit of the sheet manufacturing apparatus according to the application example includes a rotating shaft that rotates, and a plurality of blades that extend in the extending direction of the rotating shaft and rotate together with the rotating shaft. The projecting portion faces the blade.

  According to this structure, the fiber and resin mixed with a blade | wing can be easily collided with the protrusion part which opposes a blade | wing.

  Application Example 3 In the sheet manufacturing apparatus according to the application example described above, the protrusions are spaced apart from the blades in the direction of centrifugal force by the rotating blades.

  According to this configuration, when the fibers and the resin move due to the centrifugal force of the rotating blades, the fibers and the resin are likely to collide with the protrusions apart from the blades in the direction of the centrifugal force. Thereby, a fiber and resin can be disperse | distributed and it can be made easy to mix.

  Application Example 4 The housing portion of the sheet manufacturing apparatus according to the application example described above has an introduction port for introducing the fiber and the resin, and the protrusion is on the introduction port side in the extending direction of the rotating shaft. It is located in, and it is spaced apart from the said blade | wing in the extending direction of the said rotating shaft, It is characterized by the above-mentioned.

  According to this configuration, the fiber or resin introduced from the introduction port easily collides with the protrusion and is dispersed.

  Application Example 5 The rotating unit of the sheet manufacturing apparatus according to the application example described above is characterized in that a protrusion having a shorter length in the radial direction of the rotation shaft than the blades is provided between the blades. And

  According to this structure, it can be made easy to disperse | distribute by making the fiber and resin which move between several blades collide with a projection part.

  Application Example 6 A sheet manufacturing apparatus according to this application example includes a mixing unit that mixes at least fibers and a resin, and a forming unit that forms a sheet using the mixture mixed in the mixing unit. The mixing unit includes a rotation unit, and a housing unit that supports the rotation unit and surrounds the rotation unit, and the rotation unit includes a rotation shaft that rotates, and an extension of the rotation shaft. A plurality of blades extending in the direction and rotating together with the rotation shaft, and a protrusion having a shorter length in the radial direction of the rotation shaft than the blades between the blades.

  According to this configuration, since the fibers and the resin easily collide with the protrusions between the blades, the mixing efficiency of the fibers and the resin can be increased.

Schematic which shows the structure of a sheet manufacturing apparatus. Schematic which shows the structure of the mixing part concerning 1st Embodiment. Schematic which shows the structure of the mixing part concerning 1st Embodiment. Schematic which shows the structure of the mixing part concerning 2nd Embodiment. Schematic which shows the structure of the mixing part concerning 2nd Embodiment. Schematic which shows the structure of the mixing part concerning 3rd Embodiment. Schematic which shows the structure of the mixing part concerning 3rd Embodiment. Schematic which shows the structure of the mixing part concerning 4th Embodiment. Schematic which shows the structure of the mixing part concerning 4th Embodiment. Schematic which shows the structure of the blade | wing concerning a modification.

  Hereinafter, first to fourth 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. A sheet manufacturing apparatus according to the present embodiment is a sheet manufacturing apparatus including a mixing unit that mixes at least fibers and a resin, and a forming unit that forms a sheet using a mixture mixed in the mixing unit, the mixing unit Includes a rotating part, a housing part that supports the rotating part and surrounds the rotating part, and a protrusion that protrudes inward at a position facing the rotating part in the housing part. 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. 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 an additive supply unit 60. , A mixing unit 300, a deposition unit 70, a molding unit 200, and the like. 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 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. And it becomes a mechanism in which an air current is generated by rotation of a blower blade arranged adjacent to the rotary blade, and the fibers defibrated through the conveying path 202 ride on this air current and enter the classification unit 40 in the air. Be transported. 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, and includes an inlet 40a into which a defibrated material is introduced from the defibrating unit 30, a cylindrical part 41 with the inlet 40a attached in a tangential direction, and a lower part of the cylindrical part 41. Consecutive cone portion 42, lower outlet 40 b provided at the lower portion of cone portion 42, and upper exhaust port 40 c for discharging fine powder provided at the upper center of cylinder portion 41 are configured. The diameter of the conical portion 42 decreases toward the lower side in the vertical direction.

  In the classification process, the airflow on which the defibrated material introduced from the inlet 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. The fibers larger than the ink particles and having a higher density move to the lower outlet 40b, and the relatively small and lower density ink particles are led to the upper exhaust port 40c together with air as fine powder, 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 mixing unit 300. Specifically, the sorting unit 50 and the mixing unit 300 are connected by a conveyance path 204a. 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 mixing unit 300 through the conveyance path 204a. The sorting unit 50 may be transported from the sorting unit 50 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.

  In addition, an additive supply unit 60 is provided between the sorting unit 50 and the mixing unit 300 in the conveyance path 204a to supply the additive to the passing material (defibrated material) being conveyed. Examples of the additive include a resin (for example, a fusion resin or a thermosetting resin) and the like, for example, a flame retardant, a whiteness improver, a sheet strength enhancer, a sizing agent, and the like. The form of the additive may be a powder or a fiber. These additives are stored in an additive storage unit 61 provided in the additive supply unit 60. And the additive stored by the additive storage part 61 is supplied toward the conveyance path 204b from the supply port 62 by discharge mechanisms, such as a screw feeder.

  The mixing unit 300 mixes at least the fibers and the resin conveyed in the air to form a mixture, and is, for example, a blower. The passing material (fiber) conveyed from the sorting unit 50 and the resin supplied from the additive supply unit 60 are introduced into the mixing unit 300 from the introduction port 301, and the fiber and the resin are mixed inside the mixing unit 300. The And the mixture with which the fiber and resin were mixed is discharged | emitted from the discharge port 302 toward the conveyance path 204b, and is conveyed by the deposition part 70 in the air. The detailed configuration of the mixing unit 300 will be described later.

  The depositing unit 70 deposits using the mixture charged from the conveyance path 204b to form the web W. The depositing unit 70 has a mechanism for uniformly dispersing the fibers and the resin in the air, and a mechanism for depositing the dispersed fibers and the resin on the mesh belt 73. In addition, the web W concerning this embodiment means the structure form of the object containing a fiber and resin. Therefore, even when the shape or the like changes during heating, pressurizing, cutting, or conveying the web, the web is shown.

  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.

  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 pressurizing unit 140 is disposed on the downstream side of the deposition unit 70 in the conveyance direction of the web W. In addition, the pressurization part 140 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.

  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 the present embodiment, the deposition unit 70, the transport unit 100, and the heating unit 150 are part of the forming unit 200 that forms the sheet Pr using the web W.

  Moreover, 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 present 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.

  Next, the configuration of the mixing unit will be described. 2 and 3 show the configuration of the mixing unit according to the present embodiment, FIG. 2 (a) is an external perspective view of the mixing unit, FIG. 2 (b) is a plan sectional view, and FIG. ) Is a side sectional view, FIG. 3 (d) is a perspective view showing a configuration of a part of the rotating part, and FIG. 3 (e) is a schematic view schematically showing the flow process of the mixture.

  As shown in FIGS. 2A, 2B, and 2C, the mixing unit 300 includes a rotating unit 310, a housing unit 380 that supports the rotating unit 310 and covers the rotating unit 310, and a housing. A protrusion 370 that protrudes inward is provided at a position facing the rotation part 310 in the part 380.

  The housing part 380 includes an introduction port 301 connected to the transport path 204a and a discharge port 302 connected to the transport path 204b. Fibers and resin are introduced from the inlet 301, and the introduced fibers and fibers are mixed by the rotating unit 310. The mixture of the fiber and the resin is configured to flow to the discharge port 302 by the centrifugal force generated by the rotation of the rotating unit 310, and the mixture of the fiber and the resin is discharged from the discharge port 302. Yes. Note that the internal space of the housing portion 380 of the present embodiment has a substantially cylindrical shape.

  The rotating unit 310 includes a columnar rotating shaft 320, and the rotating shaft 320 is connected to a motor 309 as a rotating unit that rotates the rotating shaft 320 around the axis center. The housing part 380 includes a bearing part 330 that supports the rotating shaft 320. The bearing portion 330 according to the present embodiment is provided inside a partial wall portion of the housing portion 380. As the bearing portion 330, for example, a ball bearing, a roller bearing, or the like can be applied.

  Further, when viewed in the extending direction R of the rotation shaft 320, the rotation shaft 320 is included inside the region of the introduction port 301 (opened region) of the housing portion 380. In this embodiment, when viewed in the extending direction R of the rotation shaft 320, the rotation is performed such that the top of the rotation shaft 320 is located at a position substantially corresponding to the center of the region of the introduction port 301 (opened region). A shaft 320 is arranged (see FIG. 2B). As a result, the fibers and the resin can be efficiently introduced from the introduction port 301 toward the rotation unit 310. Further, the bearing portion 330 is disposed on the wall portion of the housing portion 380 on the side away from the introduction port 301 in the extending direction R. Thereby, the fiber and resin introduced from the inlet 301 can be made difficult to reach the periphery of the bearing portion 330.

  Further, as shown in FIGS. 2C and 3D, the rotating unit 310 includes a plurality of blades 350 that extend in the extending direction R of the rotating shaft 320 and rotate together with the rotating shaft 320. In the present embodiment, a plate portion 340 having a surface perpendicular to the extending direction R of the rotating shaft 320 and rotating integrally with the rotating shaft 320 is provided, and the plurality of blades 350 are provided in the extending direction of the plate portion 340. It is provided in a direction extending to R. Note that the plate portion 340 has a predetermined thickness when viewed in the extending direction R and has a circular shape centered on the rotation shaft 320. In addition, a gap having a predetermined dimension is formed between the end portion of the plate portion 340 and the housing portion 380 in the direction perpendicular to the extending direction R.

  The blade | wing 350 is provided in the surface of the direction where the inlet 301 is arrange | positioned among the surfaces corresponding to the extending direction R of the board part 340. As shown in FIG. Further, the blade 350 has a so-called turbo blade shape having a curved surface from the center portion to the end portion of the plate portion 340. A plurality of blades 350 (six in this embodiment) are provided, and the plurality of blades 350 are arranged at regular intervals.

  A protrusion 370 is provided so as to face the blade 350 in the housing part 380. In the present embodiment, the protrusion 370 includes a first protrusion 370 a and a second protrusion 370 b, and the first protrusion 370 a is separated from the blade 350 in the direction of centrifugal force by the rotating blade 350. Are arranged. Specifically, a plurality of first protrusions 370 a are provided on the inner wall surface 380 a of the housing portion 380 in the direction perpendicular to the extending direction R. 2B and 2C, the first protrusion 370a of the present embodiment forms a triangular prism having a convex shape from the inner wall surface 380a toward the rotation axis 320. The direction of the top side at the top of the first protrusion 370a is substantially parallel to the extending direction R. The plurality of first protrusions 370a are arranged at equal intervals. Note that the size, number, and the like of the first protrusions 370a can be appropriately set according to the size of the mixing unit 300, the amount of fibers and resin introduced, and the like.

  The second protrusion 370 b is located on the introduction port 301 side in the extending direction R of the rotating shaft 320 and is spaced from the blade 350 in the extending direction R of the rotating shaft 320. More specifically, a plurality of second projecting portions 370b are provided on the inner wall surface 380b of the housing portion 380 corresponding to the introduction port 301 side in the extending direction R. 2B and 2C, the second protrusion 370b of the present embodiment forms a triangular prism having a convex shape from the inner wall surface 380b toward the blade 350. Further, the direction of the top side at the top of the second protrusion 370b is substantially perpendicular to the extending direction R. In the present embodiment, the four second protrusions 370b are evenly arranged at intervals of 90 ° (see FIG. 2B). Note that the size and number of the second protrusions 370b can be appropriately set according to the size of the mixing unit 300, the amount of fibers and resin introduced, and the like.

  Further, the inlet 301 of the housing part 380 is disposed on the blade 350 side in the extending direction R. And the blade | wing 350 side in the rotating shaft 320 is not pivotally supported. That is, the bearing portion 330 that pivotally supports the rotary shaft 320 is provided on the side facing the introduction port 301 in the extending direction R. Thereby, the flow of the fiber and resin introduced from the introduction port 301 can be efficiently caused to flow toward the blade 350 without being hindered. The fibers and resin that have flowed into the housing portion 380 are mixed by the rotation of the rotating portion 310. As shown in FIG. 3E, the introduced fibers and resin move in the direction of rotation of the blades 350 while flowing in the direction of the inner wall surface 380a of the housing unit 380 by the centrifugal force of the blades 350 due to the rotation of the rotation unit 310. Finally, it is discharged from the discharge port 302. Here, the fibers and resin that have flowed in the direction of the inner wall surface 380a of the housing portion 380 move while colliding with the first protrusions 370a provided on the inner wall surface 380a. Thereby, the fiber and resin which collided with the 1st protrusion part 370a are disperse | distributed, and mixing of a fiber and resin is accelerated | stimulated. The introduced fiber and resin move while colliding with the second protrusion 370b provided on the inner wall surface 380b. The fibers and resin that collide with the second protrusions 370b are dispersed, and the mixing of the fibers and the resin is promoted. Note that the discharge port 302 of the present embodiment is provided so as to open in a direction perpendicular to the extending direction R. That is, since the discharge port 302 is provided in the direction along the rotation direction of the rotation shaft 320, the mixture can be efficiently discharged by the flow generated by the rotation unit 310.

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

  The fibers and the resin introduced from the introduction port 301 collide with the first protrusions 370a and the second protrusions 370b provided inside the housing part 380 by the rotation of the plurality of blades 350 of the rotating part 310 and are dispersed. It becomes easy and can be mixed easily.

(Second Embodiment)
Next, a second embodiment will be described. The sheet manufacturing apparatus according to the present embodiment is a sheet manufacturing apparatus including a mixing unit that mixes at least fibers and a resin, and a forming unit that forms a sheet using a mixture mixed in the mixing unit. A rotating portion and a housing portion that supports the rotating portion and surrounds the rotating portion, the rotating portion rotating in a direction in which the rotating shaft extends and a plurality of blades rotating together with the rotating shaft. And a protrusion having a shorter length in the radial direction of the rotation axis than the blades between the blades. The basic configuration of the sheet manufacturing apparatus 1a according to the present embodiment is the same as the configuration of the sheet manufacturing apparatus 1 according to the first embodiment, and a description thereof will be omitted (see FIG. 1). Hereinafter, the configuration different from the first embodiment, that is, the configuration of the mixing unit will be described.

  4 and 5 show the configuration of the mixing unit according to the present embodiment, FIG. 4 (a) is a plan sectional view of the mixing unit, FIG. 4 (b) is a side sectional view, and FIG. ) Is a perspective view showing a part of the rotating part, and FIG. 5D is a schematic view schematically showing the flow process of the mixture.

  As shown in FIG. 4A, the mixing unit 300a of this embodiment includes a rotating unit 310a and a housing unit 380 that supports a part of the rotating unit 310a and covers the rotating unit 310a. The housing part 380 includes an introduction port 301 connected to the transport path 204a and a discharge port 302 connected to the transport path 204b. Fibers and resin are introduced from the inlet 301, and the introduced fibers and resin are mixed by the rotating portion 310a. The mixture of the fiber and the resin is configured to flow to the discharge port 302 by the centrifugal force generated by the rotation of the rotating unit 310a, and the mixture of the fiber and the resin is discharged from the discharge port 302. Yes. Note that the basic configuration of the housing part 380 of the mixing unit 300a according to the present embodiment is the same as the configuration of the housing part 380 of the mixing unit 300 according to the first embodiment, and a description thereof will be omitted.

  The rotating unit 310a includes a columnar rotating shaft 320, and the rotating shaft 320 is connected to a motor 309 as a rotating unit that rotates the rotating shaft 320 around the axis center. The rotating unit 310 a includes a bearing unit 330 that supports the rotating shaft 320. The bearing portion 330 according to the present embodiment is provided inside a partial wall portion of the housing portion 380. As the bearing portion 330, for example, a ball bearing, a roller bearing, or the like can be applied.

  Moreover, the rotation part 310a has the some blade | wing 350 extended in the extending direction R of the rotating shaft 320 and rotating with the rotating shaft 320, as shown in FIG.4 (b) and FIG.5 (c). In the present embodiment, a plate portion 340 having a surface perpendicular to the extending direction R of the rotating shaft 320 and rotating integrally with the rotating shaft 320 is provided, and the plurality of blades 350 are provided in the extending direction of the plate portion 340. It is provided in a direction extending to R. Note that the plate portion 340 has a predetermined thickness when viewed in the extending direction R and has a circular shape centered on the rotation shaft 320. In addition, a gap having a predetermined dimension is formed between the end portion of the plate portion 340 and the housing portion 380 in the direction perpendicular to the extending direction R.

  The blade | wing 350 is provided in the surface of the direction where the inlet 301 is arrange | positioned among the surfaces corresponding to the extending direction R of the board part 340. As shown in FIG. Further, the blade 350 has a so-called turbo blade shape having a curved surface from the center portion to the end portion of the plate portion 340. A plurality of blades 350 (six in this embodiment) are provided, and the plurality of blades 350 are arranged at regular intervals.

  Further, a protrusion 390 having a shorter length in the radial direction of the rotation shaft 320 than the blade 350 is disposed between the blade 350. In the present embodiment, a protrusion 390 formed in a strip shape is provided across adjacent blades 350. Furthermore, the protrusion 390 of this embodiment is farther from the rotation shaft 320 than the first protrusion 390a provided in the vicinity of the rotation shaft 320 and the position where the first protrusion 390a is disposed from the rotation shaft 320. And a second protrusion 390b provided at a position. The first protrusion 390a and the second protrusion 390b have curved surfaces that are convex toward the end of the plate 340 in plan view (see FIG. 4A). Further, in a cross-sectional view, the height from the surface of the plate part 340 to the tops of the first protrusions 390a and the second protrusions 390b is lower than the height from the surface of the plate part 340 to the tops of the blades 350. (See FIG. 4B).

  Further, the inlet 301 of the housing part 380 is disposed on the blade 350 side in the extending direction R. And the blade | wing 350 side in the rotating shaft 320 is not pivotally supported. That is, the bearing portion 330 that pivotally supports the rotary shaft 320 is provided on the side facing the introduction port 301 in the extending direction R. Thereby, the flow of the fiber and resin introduced from the introduction port 301 can be efficiently caused to flow toward the blade 350 without being hindered. And the fiber and resin which flowed inside housing part 380 are mixed by rotation of rotation part 310a. Specifically, as shown in FIG. 5D, the fibers and the resin introduced from the introduction port 301 flow in the direction of the inner wall surface 380a of the housing part 380 by the centrifugal force of the blades 350 by the rotation of the rotating part 310a ( It moves in the direction of rotation of the blade 350 while being arrowed in the figure, and is finally discharged from the discharge port 302. Here, the fibers and the resin introduced from the introduction port 301 collide with the blades 350, the first protrusions 390 a, and the second protrusions 390 b when moving from the vicinity of the rotation shaft 320 toward the outer periphery of the blades 350. Move. The fibers and resin that have collided with the blades 350, the first protrusions 390a, and the second protrusions 390b are dispersed, and the mixing of the fibers and the resin is promoted. Then, the fibers and the resin flow along the inner wall surface 380a of the housing part 380 and are discharged from the discharge port 302.

  As mentioned above, according to the said embodiment, in addition to the effect of 1st Embodiment, the following effects can be acquired.

  The rotating part 310a includes a plurality of blades 350 and first and second protrusions 390a and 390b provided between adjacent blades 350, and fibers introduced into the housing part 380 from the inlet 301 The resin moves while colliding with the plurality of blades 350, the first protrusions 390a, and the second protrusions 390b. Thereby, the dispersion efficiency of a fiber and resin can be raised and the mixing efficiency of a fiber and resin can be improved.

(Third embodiment)
Next, a third embodiment will be described. The sheet manufacturing apparatus according to the present embodiment is a sheet manufacturing apparatus including a mixing unit that mixes at least fibers and a resin, and a forming unit that forms a sheet using a mixture mixed in the mixing unit. A rotating portion, and a housing portion that supports the rotating portion and surrounds the rotating portion, the rotating portion rotating in the extending direction of the rotating shaft and rotating with the rotating shaft. And a protrusion having a shorter length in the radial direction of the rotation axis than the blades between the blades. The basic configuration of the sheet manufacturing apparatus 1b according to the present embodiment is the same as the configuration of the sheet manufacturing apparatus 1 according to the first embodiment, and a description thereof will be omitted (see FIG. 1). Hereinafter, the configuration different from the first embodiment, that is, the configuration of the mixing unit will be described.

  6 and 7 show the configuration of the mixing unit according to the present embodiment, FIG. 6 (a) is a plan sectional view of the mixing unit, FIG. 6 (b) is a side sectional view, and FIG. ) Is a perspective view showing a part of the rotating portion, and FIG. 7D is a schematic view schematically showing the flow process of the mixture.

  As shown in FIGS. 6A and 6B, the mixing unit 300b of the present embodiment includes a rotating unit 310b, a housing unit 380 that supports a part of the rotating unit 310b and covers the rotating unit 310b, It has. The housing part 380 includes an introduction port 301 connected to the transport path 204a and a discharge port 302 connected to the transport path 204b. Fibers and resin are introduced from the inlet 301, and the introduced fibers and resin are mixed by the rotating portion 310b. The mixture of the fiber and the resin is configured to flow to the discharge port 302 by the centrifugal force generated by the rotation of the rotating unit 310b, and the mixture of the fiber and the resin is discharged from the discharge port 302. Yes. In addition, since the basic structure of the housing part 380 of the mixing part 300b of this embodiment is the same as that of the housing part 380 concerning 1st Embodiment, description is abbreviate | omitted.

  The rotation unit 310b includes a columnar rotation shaft 320, and the rotation shaft 320 is connected to a motor 309 as a rotation unit that rotates the rotation shaft 320 around the axis center. The rotating part 310b includes a bearing part 330 that supports the rotating shaft 320. The bearing portion 330 according to the present embodiment is provided inside a partial wall portion of the housing portion 380. As the bearing portion 330, for example, a ball bearing, a roller bearing, or the like can be applied.

  Moreover, the rotation part 310b has the some blade | wing 350 extended in the extension direction R of the rotating shaft 320 and rotating with a rotating shaft, as shown in FIG.6 (b) and FIG.7 (c). In the present embodiment, a plate portion 340 having a surface perpendicular to the extending direction R of the rotating shaft 320 and rotating integrally with the rotating shaft 320 is provided, and the plurality of blades 350 are provided in the extending direction of the plate portion 340. It is provided in a direction extending to R. Note that the plate portion 340 has a predetermined thickness when viewed in the extending direction R and has a circular shape centered on the rotation shaft 320. In addition, a gap having a predetermined dimension is formed between the end portion of the plate portion 340 and the housing portion 380 in the direction perpendicular to the extending direction R.

  The blade | wing 350 is provided in the surface of the direction where the inlet 301 is arrange | positioned among the surfaces corresponding to the extending direction R of the board part 340. As shown in FIG. Further, the blade 350 has a so-called turbo blade shape having a curved surface from the center portion to the end portion of the plate portion 340. A plurality of blades 350 (six in this embodiment) are provided, and the plurality of blades 350 are arranged at regular intervals.

  Further, a protrusion 390 having a shorter length in the radial direction of the rotation shaft 320 than the blade 350 is disposed between the blade 350. In the present embodiment, a third protrusion 390 c (protrusion 390) is provided between the adjacent blades 350 from the rotation shaft 320 toward the circumferential end of the plate part 340. The third protrusion 390c is about ¼ of the radius of the plate part 340 with the rotation axis 320 as the center or the length of the single blade 350 from the rotation axis 320 to the peripheral part of the plate part 340. It has a length of 1/2. Further, the third protrusion 390 c has a convex curved surface, similar to the shape of the blade 350. (See FIG. 6 (a)). In a cross-sectional view, the height from the surface of the plate portion 340 to the top of the third protrusion 390c is set to be the same as or lower than the height from the surface of the plate portion 340 to the top of the blade 350 ( (Refer FIG.6 (b)).

  Further, the inlet 301 of the housing part 380 is disposed on the blade 350 side in the extending direction R. And the blade | wing 350 side in the rotating shaft 320 is not pivotally supported. That is, the bearing portion 330 that pivotally supports the rotary shaft 320 is provided on the side facing the introduction port 301 in the extending direction R. Thereby, the flow of the fiber and resin introduced from the introduction port 301 can be efficiently caused to flow toward the blade 350 without being hindered. The fibers and resin that have flowed into the housing portion 380 are mixed by the rotation of the rotating portion 310b. Specifically, as shown in FIG. 7D, the fibers and the resin introduced from the introduction port 301 flow in the direction of the inner wall surface 380a of the housing part 380 by the centrifugal force of the blades 350 by the rotation of the rotating part 310b ( It moves in the direction of rotation of the blade 350 while being arrowed in the figure, and is finally discharged from the discharge port 302. Here, the fibers and the resin introduced from the introduction port 301 move while colliding with the blade 350 and the third projecting portion 390c when moving from the vicinity of the rotation shaft 320 toward the outer periphery of the blade 350. The fibers and resin that collide with the blades 350 and the third protrusions 390c are dispersed, and the mixing of the fibers and the resin is promoted. Then, the fibers and the resin flow along the inner wall surface 380a of the housing part 380 and are discharged from the discharge port 302.

  As mentioned above, according to the said embodiment, in addition to the effect of 1st and 2nd embodiment, the following effects can be acquired.

  The rotating part 310b includes a plurality of blades 350 and a third protrusion 390c provided between the adjacent blades 350, and the fibers and resin introduced into the housing part 380 from the introduction port 301 are a plurality of blades. It moves while colliding with 350 and the third protrusion 390c. Thereby, the dispersion efficiency of a fiber and resin can be raised and the mixing efficiency of a fiber and resin can be improved.

(Fourth embodiment)
Next, a fourth embodiment will be described. The sheet manufacturing apparatus according to the present embodiment is a sheet manufacturing apparatus including a mixing unit that mixes at least fibers and a resin, and a forming unit that forms a sheet using a mixture mixed in the mixing unit. A rotating portion, and a housing portion that supports the rotating portion and surrounds the rotating portion, and the rotating portion includes a rotating shaft that rotates and a plurality of blades that extend in the extending direction of the rotating shaft and rotate together with the rotating shaft. A protrusion having a shorter length in the radial direction of the rotation shaft than the blade, and having a protrusion protruding inward at a position facing the rotation shaft in the housing portion. is there. The basic configuration of the sheet manufacturing apparatus 1c according to the present embodiment is the same as the configuration of the sheet manufacturing apparatus 1 according to the first embodiment, and a description thereof will be omitted (see FIG. 1). Hereinafter, the configuration different from the first embodiment, that is, the configuration of the mixing unit will be described.

  8 and 9 show the configuration of the mixing unit according to the present embodiment, FIG. 8 (a) is a plan sectional view of the mixing unit, FIG. 8 (b) is a side sectional view, and FIG. ) Is a schematic view schematically illustrating the flow process of the mixture.

  As shown in FIG. 8A and FIG. 8B, the mixing unit 300c of this embodiment includes a rotating unit 310a, a housing unit 380 that supports a part of the rotating unit 310a and covers the rotating unit 310a, It has. The housing part 380 includes an introduction port 301 connected to the transport path 204a and a discharge port 302 connected to the transport path 204b. Fibers and resin are introduced from the inlet 301, and the introduced fibers and resin are mixed by the rotating portion 310b. The mixture of the fiber and the resin is configured to flow to the discharge port 302 by the centrifugal force generated by the rotation of the rotating unit 310a, and the mixture of the fiber and the resin is discharged from the discharge port 302. Yes. In addition, since the basic structure of the housing part 380 of the mixing part 300c of this embodiment is the same as that of the housing part 380 concerning 1st Embodiment, description is abbreviate | omitted.

  Further, as shown in FIGS. 8A and 8B, the mixing unit 300c is rotated by the rotating unit 310a, the housing unit 380 that supports the rotating unit 310a and covers the rotating unit 310a, and the housing unit 380. A protrusion 370 protruding inward is provided at a position facing the portion 310a.

  The rotating unit 310a includes a columnar rotating shaft 320, and the rotating shaft 320 is connected to a motor 309 as a rotating unit that rotates the rotating shaft 320 around the axis center. The rotating unit 310 a includes a bearing unit 330 that supports the rotating shaft 320. The bearing portion 330 according to the present embodiment is provided inside a partial wall portion of the housing portion 380. As the bearing portion 330, for example, a ball bearing, a roller bearing, or the like can be applied.

  Further, when viewed in the extending direction R of the rotation shaft 320, the rotation shaft 320 is included inside the region of the introduction port 301 (opened region) of the housing portion 380. In this embodiment, when viewed in the extending direction R of the rotation shaft 320, the rotation is performed such that the top of the rotation shaft 320 is located at a position substantially corresponding to the center of the region of the introduction port 301 (opened region). A shaft 320 is arranged. As a result, the fibers and the resin can be efficiently introduced from the introduction port 301 toward the rotation unit 310. Further, the bearing portion 330 is disposed on the wall portion of the housing portion 380 on the side away from the introduction port 301 in the extending direction R. Thereby, the fiber and resin introduced from the introduction port 301 can be made difficult to reach the bearing portion 330.

  Further, the rotating part 310a has a plurality of blades 350 that extend in the extending direction R of the rotating shaft 320 and rotate together with the rotating shaft. In the present embodiment, a plate portion 340 having a surface perpendicular to the extending direction R of the rotating shaft 320 and rotating integrally with the rotating shaft 320 is provided, and the plurality of blades 350 are provided in the extending direction of the plate portion 340. It is provided in a direction extending to R. Further, when viewed in the extending direction R, the plate portion 340 has a circular shape centered on the rotation shaft 320 and has a predetermined thickness. In addition, a gap having a predetermined dimension is formed between the end portion of the plate portion 340 and the housing portion 380 in the direction perpendicular to the extending direction R.

  The blade | wing 350 is provided in the surface of the direction where the inlet 301 is arrange | positioned among the surfaces corresponding to the extending direction R of the board part 340. As shown in FIG. Further, the blade 350 has a so-called turbo blade shape having a curved surface from the center portion to the end portion of the plate portion 340. A plurality of blades 350 (six in this embodiment) are provided, and the plurality of blades 350 are arranged at regular intervals.

  Further, a protrusion 390 having a shorter length in the radial direction of the rotation shaft 320 than the blade 350 is disposed between the blade 350. In the present embodiment, a protrusion 390 formed in a strip shape is provided across adjacent blades 350. Furthermore, the protrusion 390 of this embodiment is farther from the rotation shaft 320 than the first protrusion 390a provided in the vicinity of the rotation shaft 320 and the position where the first protrusion 390a is disposed from the rotation shaft 320. And a second protrusion 390b provided at a position. The first protrusion 390a and the second protrusion 390b have curved surfaces that are convex toward the end of the plate part 340 in plan view (see FIG. 8A). Further, in a cross-sectional view, the height from the surface of the plate part 340 to the tops of the first protrusions 390a and the second protrusions 390b is lower than the height from the surface of the plate part 340 to the tops of the blades 350. (See FIG. 8B).

  A protrusion 370 is provided so as to face the blade 350 in the housing part 380. In the present embodiment, the protrusion 370 includes a first protrusion 370 a and a second protrusion 370 b, and the first protrusion 370 a is separated from the blade 350 in the direction of centrifugal force by the rotating blade 350. Are arranged. Specifically, a plurality of first protrusions 370 a are provided on the inner wall surface 380 a of the housing portion 380 in the direction perpendicular to the extending direction R. Further, the first protrusion 370a of the present embodiment forms a triangular prism having a convex shape from the inner wall surface 380a toward the rotation axis 320. The direction of the top side at the top of the first protrusion 370a is substantially parallel to the extending direction R. The plurality of first protrusions 370a are arranged at equal intervals. Note that the size and number of the first protrusions 370a can be appropriately set according to the size of the mixing unit 300c, the amount of fibers and resin introduced, and the like.

  The second protrusion 370 b is located on the introduction port 301 side in the extending direction R of the rotating shaft 320 and is spaced from the blade 350 in the extending direction R of the rotating shaft 320. More specifically, a plurality of second projecting portions 370b are provided on the inner wall surface 380b of the housing portion 380 corresponding to the introduction port 301 side in the extending direction R. Further, the second protrusion 370b of the present embodiment forms a triangular prism having a convex shape from the inner wall surface 380b toward the blade 350. Further, the direction of the top side at the top of the second protrusion 370b is substantially perpendicular to the extending direction R. In the present embodiment, the four second protrusions 370b are evenly arranged at intervals of 90 ° (see FIG. 8A). Note that the size and number of the second protrusions 370b can be appropriately set depending on the size of the mixing unit 300c, the amount of fibers and resin introduced, and the like.

  Further, the inlet 301 of the housing part 380 is disposed on the blade 350 side in the extending direction R. And the blade | wing 350 side in the rotating shaft 320 is not pivotally supported. That is, the bearing portion 330 that pivotally supports the rotary shaft 320 is provided on the side facing the introduction port 301 in the extending direction R. Thereby, the flow of the fiber and resin introduced from the introduction port 301 can be efficiently caused to flow toward the blade 350 without being hindered. And the fiber and resin which flowed inside housing part 380 are mixed by rotation of rotation part 310a. Then, as shown in FIG. 9C, the fibers and resin introduced from the inlet 301 flow in the direction of the inner wall surface 380a of the housing part 380 by the centrifugal force of the blades 350 due to the rotation of the rotating part 310a (in the figure). It moves in the direction of rotation of the blade 350 while being arrowed, and is finally discharged from the discharge port 302. Here, the fibers and the resin introduced from the introduction port 301 collide with the blades 350, the first protrusions 390 a, and the second protrusions 390 b when moving from the vicinity of the rotation shaft 320 toward the outer periphery of the blades 350. Move. The fibers and resin that have collided with the blades 350, the first protrusions 390a, and the second protrusions 390b are dispersed, and the mixing of the fibers and the resin is promoted. And while moving in the direction of the inner wall surface 380a of the housing part 380 due to the centrifugal force of the blade 350 due to the rotation of the rotating part 310a, it moves in the rotating direction of the blade 350 and is finally discharged from the discharge port 302. Furthermore, the fibers and resin that have flowed in the direction of the inner wall surface 380a of the housing portion 380 move while colliding with the first protrusion 370a provided on the inner wall surface 380a. The fibers and resin that collide with the first protrusions 370a are dispersed, and the mixing of the fibers and the resin is promoted. The introduced fiber and resin move while colliding with the second protrusion 370b provided on the inner wall surface 380b. The fibers and resin that collide with the second protrusions 370b are dispersed, and the mixing of the fibers and the resin is promoted. Note that the discharge port 302 of the present embodiment is provided so as to open in a direction perpendicular to the extending direction R. That is, since the discharge port 302 is provided in the direction along the rotation direction of the rotation shaft 320, the mixture can be efficiently discharged by the flow generated by the rotation unit 310.

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

  The fibers and resin introduced from the inlet 301 move while colliding with the plurality of blades 350, the first protrusions 390a, and the second protrusions 390b. Further, the fibers and the resin move while colliding with the first protrusion 370a and the second protrusion 370b provided on the inner wall surface 380a of the housing part 380. Thereby, the dispersion efficiency of a fiber and resin can be raised and the mixing efficiency of a fiber and resin can be improved.

  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) The blade 350 of the above embodiment has a so-called turbo-shaped blade shape having a curved surface from the center portion to the end portion of the plate portion 340, but is not limited to this configuration. FIG. 10 is a schematic diagram (perspective view) showing a configuration of a blade according to the first modification. As shown in FIG. 10, the blade 350 a may have a plate shape (plate type) having a flat surface from the center portion to the end portion of the plate portion 340. Further, a protrusion 390 having a shorter length in the radial direction of the rotation shaft 320 than the blade 350a may be disposed between the blade 350a and the blade 350a. For example, as shown to Fig.10 (a), you may provide the projection part 391 formed in strip | belt shape over adjacent blade | wing 350a. Furthermore, the protrusion 391 of the present modification is provided at a position farther from the rotation shaft 320 than the protrusion 391a provided near the rotation shaft 320 and the position where the protrusion 391a is disposed from the rotation shaft 320. And a protruding portion 391b. The protruding portions 391a and 391b form a triangular prism having a convex shape from the surface of the plate portion 340 toward the top. The height from the surface of the plate part 340 to the tops of the protrusions 391a and 391b is lower than the height from the surface of the plate part 340 to the tops of the blades 350a. Even in this case, the fibers and the resin introduced into the housing portion 380 from the introduction port 301 move while colliding with the plurality of blades 350a and the protruding portions 391a and 391b. Thereby, the dispersion efficiency of a fiber and resin can be raised and the mixing efficiency of a fiber and resin can be improved.

  Further, as shown in FIG. 10B, a protrusion 391c may be provided between the plate-shaped blade 350a and the blade 350a from the rotating shaft 320 toward the circumferential portion of the plate portion 340. The protrusion 391c has a radius of the plate portion 340 with the rotation axis 320 as the center or a length from the rotation axis 320 of one blade 350a toward the peripheral portion of the plate portion 340 to about 1/4 to 1 /. Has a length of two. The protrusion 391c has a plate shape (plate type) having a flat surface from the center to the end of the plate 340, similarly to the shape of the blade 350a. In addition, the height from the surface of the plate portion 340 to the top of the protrusion 391c is set to be the same as or lower than the height from the surface of the plate portion 340 to the top of the blade 350a. Even in this case, the fiber or resin introduced into the housing portion 380 from the introduction port 301 moves while colliding with the plurality of blades 350a and the protruding portions 391c. Thereby, the dispersion efficiency of a fiber and resin can be raised and the mixing efficiency of a fiber and resin can be improved.

  (Modification 2) Although the first protrusion 370a and the second protrusion 370b are provided in the fourth embodiment, the present invention is not limited to this. For example, the structure which abbreviate | omitted the 2nd protrusion 370b may be sufficient. If it does in this way, the structure of the mixing part 300c can be simplified, the dispersion efficiency of a fiber and resin can be raised, and the mixing efficiency of a fiber and resin can be raised.

  (Modification 3) In the said embodiment, although the front-end | tip shape of the rotating shaft 320 by the side of the inlet 301 in the extending direction R was made into the flat surface, it is not limited to this. For example, the shape of the tip of the rotating shaft 320 may be a conical shape. In this way, the fiber or resin introduced from the introduction port 301 can be smoothly introduced into the housing portion 380 without colliding with the rotating shaft 320.

  (Modification 4) You may comprise a mixing part combining the each structure of the said 1st-4th embodiment and each structure in the said modification arbitrarily. In this way, the degree of freedom of the usage environment can be increased.

  DESCRIPTION OF SYMBOLS 1,1a, 1b, 1c ... Sheet manufacturing apparatus, 10 ... Input part, 20 ... Roughing part, 30 ... Defibration part, 40 ... Classification part, 50 ... Sorting part, 60 ... Additive supply part, 70 ... Deposition part DESCRIPTION OF SYMBOLS 100 ... Conveying part 150 ... Heating part 200 ... Molding part 300, 300a, 300b, 300c ... Mixing part 301 ... Inlet port 302 ... Discharge port 310, 310a, 310b ... Rotating part, 320 ... Rotating shaft , 330 ... bearing part, 340 ... plate part, 350, 350a ... blade, 370 ... projection, 370a ... first projection, 370b ... second projection, 380 ... housing part, 380a ... inner wall surface, 380b ... inner wall surface 390... Projection, 390a. First projection, 390b. Second projection, 390c. Third projection, 391, 391a, 391b, 391c.

Claims (6)

A mixing section for mixing at least fibers and resin;
A sheet manufacturing apparatus comprising: a molding unit that molds a sheet using the mixture mixed in the mixing unit,
The mixing unit includes:
A rotating part;
A housing portion surrounding the rotating portion;
A sheet manufacturing apparatus, comprising: a protrusion projecting inward at a position facing the rotating part in the housing part. In the sheet manufacturing apparatus according to claim 1,
The rotating part is
A rotating axis of rotation;
A plurality of blades extending in the extending direction of the rotating shaft and rotating together with the rotating shaft;
The sheet manufacturing apparatus according to claim 1, wherein the protrusion is opposed to the blade. In the sheet manufacturing apparatus according to claim 1 or 2,
The protrusion is
The sheet manufacturing apparatus, wherein the sheet manufacturing apparatus is spaced from the blade in the direction of centrifugal force by the rotating blade. In the sheet manufacturing apparatus according to claim 1 or 2,
The housing part is
An inlet for introducing the fiber and the resin;
The protrusion is
The sheet manufacturing apparatus is located on the introduction port side in the extending direction of the rotating shaft and is spaced apart from the blade in the extending direction of the rotating shaft. In the sheet manufacturing apparatus according to any one of claims 1 to 3,
The rotating part is
A sheet manufacturing apparatus comprising: a protrusion having a shorter length in the radial direction of the rotation shaft than the blade between the blade. A mixing section for mixing at least fibers and resin;
A sheet manufacturing apparatus comprising: a molding unit that molds a sheet using the mixture mixed in the mixing unit,
The mixing unit includes:
A rotating part, and a housing part that supports the rotating part and surrounds the rotating part,
The rotating part is
A rotating axis of rotation;
A plurality of blades extending in the extending direction of the rotating shaft and rotating together with the rotating shaft;
A sheet manufacturing apparatus comprising: a protrusion having a shorter length in the radial direction of the rotation shaft than the blade, between the blade and the blade.

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