JP6409924B2 - Defibrating equipment - Google Patents

Description

  The present invention relates to a sheet manufacturing apparatus and a defibrating unit.

  In the field of sheet production, generally, a process (disaggregation process) for fiberizing a raw material is performed before a process for forming a sheet. At present, in the disaggregation process, a wet method using a large amount of water has become mainstream. Therefore, after the sheet is formed, steps such as dehydration and drying are required. In addition, the sheet manufacturing apparatus requires a large utility such as water, electric power, and drainage facilities, so it is difficult to reduce the size. For this reason, it has become difficult to meet the recent demands for energy saving and environmental protection.

  As a method for producing a sheet in place of the conventional papermaking method, a method called a dry method that uses little or no water is expected, but at present, in producing a sheet, a raw material is used as a final product. Until it becomes a certain sheet, the technique of consistently producing it by dry process is not always well established. In addition, disaggregating raw materials such as waste paper and pulp by a dry method is generally called defibration.

  Patent Document 1 discloses a rotating body for rubbing and defibrating for defibrating a continuous body of a material to be defibrated such as a synthetic resin to obtain a cotton-like material. The rotating body of the same document is formed by laminating disks having saw blade-like protrusions and inclining the saw blade-like protrusions so as to be spiral. According to the literature, the tip of the blade of the rotating body is set to have a thickness of 0.1 mm or less, and the blade is bitten into the material to be defibrated (see paragraph 0026 of the literature) to obtain a cotton-like product. It has been tried.

JP 2008-031578 A

  However, using the technique described in Patent Document 1, when the rotating body is rotated in a state where the blade is bitten into the defibrated material consisting of entangled fibers or the defibrated material in which fibers are bound together, The fiber is chopped by the blade, and the number of fibers having a fiber length shorter than the original fiber length increases. When a sheet is produced with such a short fiber, the number of fixing points where one fiber is fixed to another fiber is reduced, and there is a concern that sufficient strength as a sheet cannot be obtained.

  One of the objects according to some aspects of the present invention is to provide a defibrating unit for defibrating a material to be defibrated, in which the fiber length is defibrated without making the fiber length too short and practical. It is in providing the sheet manufacturing apparatus which can manufacture the sheet | seat which has sufficient intensity | strength, or such a defibrating part.

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

  One aspect of the sheet manufacturing apparatus according to the present invention includes a defibrating unit that rotates a rotating unit to dry defibrate a dry defibrated material, and deposits at least a part of the defibrated material that has been dry defibrated. A sheet manufacturing apparatus that manufactures a sheet by heating, wherein the rotating part includes a base part that is located on the rotation center side and a plurality of protrusions that protrude from the base part in a direction away from the rotation center. The rotating plates are stacked so that the protrusions are in contact with each other in the direction in which the rotation center extends.

  In such a sheet manufacturing apparatus, in the defibrating unit, the protrusions are stacked so as to be in contact with the direction in which the rotation axis extends, so the direction intersecting the direction in which the protrusions are stacked (the direction intersecting the thickness direction of the rotating plate) ), An opposing surface formed by a plurality of protrusions is formed. Then, when the rotating portion rotates, the counter surface rotates so as to advance in the rotation direction, the defibrated material collides with the counter surface, and a high-speed airflow is formed in the rotation direction. Thereby, the effect | action which cut | disconnects to-be-defibrated material or its fiber is suppressed, and to-be-defibrated material can be defibrated so that the fiber length of the obtained defibrated material may not be shortened too much. Therefore, a sheet having practical strength can be easily manufactured.

  In the sheet manufacturing apparatus according to the present invention, the rotating plate may integrally include the base and the plurality of protrusions, and the base and the plurality of protrusions may have the same thickness.

  In such a sheet manufacturing apparatus, since the base and the protrusion of the rotating plate are integrated with the same thickness in the defibrating unit, it is not necessary to change the thickness as a whole. Manufacturing process such as pressing, laser processing and wire electric discharge machining is easy and can be processed with high accuracy.

  In the sheet manufacturing apparatus according to the present invention, the defibrating unit may include the rotating unit and a fixing unit that is separated from the rotating unit in a direction away from the rotation center, and the rotation of the fixing unit. The center-side surface may have irregularities in the circumferential direction.

  In such a sheet manufacturing apparatus, in the defibrating unit, the unevenness of the fixing unit and the protrusion of the rotating unit face each other. As a result, when the rotating part rotates, the defibrating part can be efficiently defibrated by the high-speed airflow in the gap between the rotating part and the fixed part and the collision action of the fixed part with the convex part. .

  In the sheet manufacturing apparatus according to the present invention, the fixing unit may stack the fixing plate having the unevenness in a direction in which the rotation center extends.

  In such a sheet manufacturing apparatus, the fixed portion of the defibrating unit is formed by stacking fixed plates. Thereby, the processing precision of a fixed part can be raised.

  In the sheet manufacturing apparatus according to the present invention, the rotating plate of the rotating unit and the fixed plate of the fixed unit may be the same material and have the same thickness.

  In such a sheet manufacturing apparatus, in the defibrating unit, the rotating unit and the fixed unit can be simultaneously formed by press working or the like. Furthermore, this enables the rotating part and the fixed part to be manufactured with higher accuracy, so that the dimensional accuracy of the gap between them can be further improved.

  In the sheet manufacturing apparatus according to the present invention, the rotating unit may stack the rotating plates such that protrusions of different rotating plates are shifted.

  According to such a sheet manufacturing apparatus, the path for the defibrated material to pass through in the defibrating unit can be made substantially longer. Therefore, the movement of the material to be defibrated in the rotation axis direction is suppressed, the residence time in the defibrating unit can be lengthened, and the defibrating treatment can be performed more reliably.

  In the sheet manufacturing apparatus according to the present invention, a plurality of step portions in which a plurality of the rotating plates are stacked without shifting the protrusions may be provided, and the step portions may be stacked so that the protrusions are shifted. .

  The defibrating unit of such a sheet manufacturing apparatus is provided with a facing surface that is formed by a plurality of protrusions and is formed in a stepped portion, and the facing surface is shifted in a direction along the rotation axis. Therefore, the action of hitting the material to be defibrated is increased, the residence time of the material to be defibrated in the defibrating portion can be lengthened, and the defibrating treatment can be performed more reliably.

  The sheet manufacturing apparatus which concerns on this invention WHEREIN: You may have a partition plate of the magnitude | size same as the front-end | tip of the said protrusion, or the magnitude | size inside the front-end | tip of the said protrusion between the said step parts.

  Since the defibrating unit of such a sheet manufacturing apparatus includes a partition plate, the residence time of the defibrated material in the defibrating unit can be increased. Moreover, since the material to be defibrated passes through the outer peripheral portion of the rotating portion due to the presence of the partition plate, the defibrating treatment can be performed more reliably.

  One aspect of the defibrating unit according to the present invention is a defibrating unit that rotates a rotating unit to defibrate an object to be defibrated, and the rotating unit includes a plurality of rotations provided with a plurality of protrusions on the outer periphery. The plates are stacked so that the protrusions are in contact with the center of rotation.

  Since the defibrating part is laminated so that the protrusions are in contact with the direction in which the rotation axis extends, a plurality of defibrating parts are provided in a direction intersecting the direction in which the protrusions are laminated (direction intersecting the thickness direction of the rotating plate). A facing surface formed by the protrusion is formed. Then, when the rotating portion rotates, the counter surface rotates so as to advance in the rotation direction, and the defibrated material collides with the counter surface and a high-speed airflow is formed in the rotation direction. Thereby, the effect | action which cuts the fiber produced from a material to be defibrated is suppressed, and the material to be defibrated can be defibrated so that the fiber length of the obtained defibrated material is not too short.

The schematic diagram which shows the rotating plate which concerns on embodiment. The schematic diagram which shows the fixed plate which concerns on embodiment. The schematic diagram which looked at the rotation plate and fixed plate which concern on embodiment planarly. The schematic diagram which shows the rotation part which concerns on embodiment. The schematic diagram which shows the fixing | fixed part which concerns on embodiment. The schematic diagram which shows the partial cross section of the defibrating part which concerns on embodiment. The schematic diagram which expands and shows the protrusion vicinity of the rotating plate which concerns on embodiment. The figure which shows typically the sheet manufacturing apparatus which concerns on embodiment.

  Several embodiments of the present invention will be described below. The embodiments described below illustrate examples of the present invention. The present invention is not limited to the following embodiments, and includes various modified embodiments that are implemented within a range that does not change the gist of the present invention. Note that not all of the configurations described below are essential configurations of the present invention.

1. Sheet Manufacturing Apparatus A sheet manufacturing apparatus 1000 according to the present embodiment includes a defibrating unit 300. Hereinafter, the sheet manufacturing apparatus 1000 will be described with reference to the drawings as appropriate.

  In this specification, the material to be defibrated is a pulp sheet, paper, waste paper, non-woven fabric, fiber board, tissue paper, kitchen paper, cleaner, filter, liquid absorbent material, sound absorber, shock absorber, mat, etc. It is entangled or bound. Examples of such fibers include natural fibers (animal fibers, plant fibers), chemical fibers (organic fibers, inorganic fibers, organic-inorganic composite fibers), and more specifically, cellulose, silk, wool, cotton, cannabis, kenaf, From fiber made of flax, ramie, burlap, manila hemp, sisal hemp, conifer, hardwood, rayon, lyocell, cupra, vinylon, acrylic, nylon, aramid, polyester, polyethylene, polypropylene, polyurethane, polyimide, carbon, glass, metal The fiber to be defibrated may contain these fibers alone or may be a mixture of a plurality of types of fibers.

  In the present specification, the dry type means not in a liquid but in the air. The dry category includes a dry state and a state where a liquid present as an impurity or a liquid added intentionally exists.

1.1. The defibrating unit The defibrating unit 300 of the sheet manufacturing apparatus 1000 according to the present embodiment includes the rotating unit 100, and rotates the rotating unit 100 to dry-defibrate the object to be defibrated. Further, the defibrating unit 300 of the present embodiment has a fixing unit 200.

  FIG. 1 is a schematic diagram showing a rotating plate 10 of the rotating unit 100. FIG. 2 is a schematic diagram showing the fixing plate 20 of the fixing unit 200. FIG. 3 is a schematic view of the rotating plate 10 and the fixed plate 20 as viewed in plan, and shows a state in which the rotating plate 10 is disposed inside the fixed plate 20. FIG. 4 is a schematic diagram showing the rotating unit 100. FIG. 5 is a schematic diagram showing the fixing unit 200. FIG. 6 is a schematic diagram showing a partial cross section of the defibrating unit 300. FIG. 7 is an enlarged schematic view showing the vicinity of the protrusion 12 of the rotating plate 10.

  The defibrating unit 300 performs dry defibrating processing on the material to be defibrated. The defibrating unit 300 generates fibers that are unraveled into a fibrous shape by defibrating a material to be defibrated. The “defibration treatment” refers to a treatment for unraveling a material to be defibrated, in which a plurality of fibers are bound, into individual fibers. Moreover, in this specification, what passed through the gap G (described later) of the defibrating unit 300 may be referred to as “defibrated material”.

  The defibrating unit 300 according to the present embodiment includes a rotating unit 100 that includes a plurality of rotating plates 10 as shown in FIG. Further, the defibrating unit 300 of the present embodiment includes a fixing unit 200 as shown in FIG. 5 configured to include a plurality of fixing plates 20, and the rotating unit 100 is arranged around the rotation axis 120 as shown in FIG. It is configured to rotate inside the fixed part 200.

1.1.1. Rotating unit The rotating unit 100 includes a plurality of rotating plates 10. The number of the rotating plates 10 included in the rotating unit 100 is not limited as long as it is plural. As shown in FIG. 4, the rotating unit 100 has a structure in which at least two of the plurality of rotating plates 10 are stacked in contact with the rotating shaft 120 in the direction in which the rotating shaft 120 extends. Further, as shown in FIG. 4, in the rotating unit 100, other members such as the partition plate 30 may be stacked. In such a case, the rotating plate 10 may not necessarily be stacked in contact with each other. .

  As shown in FIGS. 1 and 3, the rotating plate 10 is a plate-like member, and includes a base 11 located on the rotation center 110 side and a plurality of protrusions 12 protruding from the base 11 in a direction away from the rotation center 110. With. The rotation center 110 is a position that becomes the center when the rotation unit 100 rotates, and is a virtual line that passes through the vicinity of the center of gravity of the rotation plate 10. Since the rotating plate 10 is rotated around the rotation center 110 by the rotation shaft 120, it is preferable that the rotation plate 10 be formed so as to balance the weight with respect to the rotation center 110.

  As shown in the figure, the base 11 of the rotating plate 10 has a fitting hole 13 that engages with the rotating shaft 120 and allows the rotating plate 10 to rotate with the rotation of the rotating shaft 120. Further, the base 11 has a plurality of meat steals 14 for reducing the weight of the rotary plate 10. Further, the base 11 is formed with a plurality of bolt holes 15 for holding the plurality of rotating plates 10 in a stacked state.

  As shown in the figure, the protrusions 12 of the rotating plate 10 are substantially rectangular protrusions in plan view (see FIG. 3), and protrude radially from the rotation center 110 toward the outside. The number of the protrusions 12 is not particularly limited as long as the ability of the defibrating process is not impaired. In the example shown in FIGS. 1 and 3, the rotating plate 10 is provided with 20 protrusions 12 at equal intervals.

  The tip of the protrusion 12 (the position farthest from the rotation center 110) and the tip of the tip that advances when rotated (the tip of the tip that collides with the object to be defibrated by the rotation of the rotating part 100) are sharp. The shape is not. As shown in the drawing, the surface at the tip of the projecting portion 12 that advances when rotated is a substantially rectangular shape, and forms a surface that generates an air flow when the rotating plates 10 are stacked. That is, a shape that suppresses the action of biting into the article to be defibrated when the tip of the protrusion 12 comes into contact with the article to be defibrated without reducing the thickness of the tip part of the protrusion 12. It is preferable that If the shape of the tip of the protrusion 12 is a shape that is difficult to bite into the defibrated material, cutting of the fibers contained in the defibrated material is suppressed, so the defibrated material that has passed through the defibrated portion 300 It can suppress that a fiber becomes short. Moreover, by setting it as such a shape, the effect | action which strikes and loosens a to-be-defibrated material can be heightened. Moreover, by setting it as such a shape, the effect | action which grinds a material to be defibrated can be suppressed.

  Further, in the illustrated example, six meat stealers 14 and six bolt holes 15 are formed in the base portion 11 of the rotating plate 10, but an appropriate number of these may be provided as necessary. In the illustrated example, the base 11 has a substantially circular shape in plan view, but may have a shape including a polygon or a curve. Although not shown, protrusions and guides for aligning the positions of members (including adjacent rotating plates 10) stacked on the rotating plate 10 may be formed. It may be protrudingly provided.

  The thickness of the rotating plate 10 is not particularly limited. The thicknesses of the base 11 and the protrusions 12 of the rotating plate 10 may be the same or different, but when they are different, the protrusions 12 belonging to the adjacent rotating plates 10 can contact each other so that the protrusions 12 can contact each other. It is preferable that the thickness is larger. If the thicknesses of the base 11 and the protrusion 12 of the rotating plate 10 are the same, it is preferable because they can be easily manufactured by press working or the like. Moreover, the thickness of the protrusion 12 is the same from the base 11 side to the tip. The base 11 and the protrusion 12 of the rotating plate 10 may be formed integrally, or may be formed separately and the protrusion 12 may be disposed so as to protrude from the base 11 by an appropriate means. In the present specification, the thickness of the rotating plate 10 (including the base 11 and the protrusion 12) refers to the dimension of the rotating plate 10 in the direction in which the rotating shaft 120 extends.

  Examples of the material of the rotating plate 10 include stainless steel, high hardness steel, ceramics, cemented carbide, and precipitation hardening stainless steel. Further, the base 11 and the protrusion 12 may be formed of different materials. In addition, after the rotary plate 10 is formed of a predetermined material, the surface of the rotary plate 10 may be subjected to a treatment for hardening the surface by gas nitriding treatment, plating, or the like. Further, the curing process may be performed after the plates are stacked. In this way, the material used for the curing process can be reduced. The rotating plate 10 can be formed by punching a cold rolled steel plate, a steel strip (SPCC, SPCD, SPCE, SPCF, SPCG) or the like with a press.

  If the rotating part 100 is formed by laminating the rotating plates 10, the rotating part 100 can be formed by pressing as described above. Therefore, the rotating part is created more efficiently than when the rotating part is formed by casting or cutting. be able to. Moreover, if it is press work, since the position of the above-mentioned meat stealing 14 and the bolt hole 15 can also be changed suitably, it can respond easily also to the aspect (it mentions later) which arrange | positions the protrusion 12 offset. Furthermore, if the rotating part 100 is formed by laminating the rotating plates 10, the thickness (the length in the direction along the rotating shaft 120) can be easily set to a predetermined thickness.

  The size of the rotating plate 10 can be appropriately determined depending on the processing capability of the defibrating unit 300 and the like. Further, the size of the base 11 and the length of the protrusion 12 protruding from the base 11 are not particularly limited. The distance from the rotation center 110 to the tip of the protrusion 12 is the same for the plurality of protrusions 12. Thus, when the rotating part 100 rotates, the trajectory in which the tips of the projecting parts 12 become substantially the same circle is drawn, so that the size of the gap (gap G: described later) with the fixed part 200 is set to the entire circumference. Can be kept almost constant over time.

  In the rotating unit 100, the rotating plate 10 is stacked so that the protrusions 12 belonging to the adjacent rotating plates 10 are in contact with each other in the direction in which the rotation center 110 (the rotating shaft 120) extends. However, as shown in FIG. 5, when a partition plate 30 (described later) is employed, the protrusions 12 do not have to be stacked so as to contact each other.

  Here, the term “laminated so that the two protrusions 12 are in contact with each other” means that the two protrusions 12 are arranged without a gap in the direction in which the rotating shaft 120 extends. However, in practice, a slight gap may be generated due to a dimensional error or warpage of each member. Even if a gap is generated, there is no problem as long as it is a gap that is difficult for fibers to enter. Therefore, such a gap is included in the stacked layers so as to be in contact with each other. Further, when the two protrusions 12 are stacked so as to be in contact with each other, it is only necessary that at least a part of the two protrusions 12 is stacked up to the tip of the surface that intersects the direction in which the respective rotation shafts 120 extend. . That is, when the two rotating plates 10 are stacked such that the two projecting portions 12 belonging to each of the rotating plates 10 are in contact with each other, the two projecting portions 12 are in contact with each other in the circumferential direction of the rotating shaft 120 with an angle shifted. It may be laminated. Note that the direction of shifting when the protrusions 12 are shifted and stacked is arbitrary regardless of the rotation direction, and is appropriately designed according to the type of fiber to be defibrated and other conditions.

  Further, when the protrusions 12 are stacked while being shifted in the circumferential direction, the degree of shift (angle) is such that no gap is generated at the tip of the protrusion 12 when viewed from the direction along the rotation axis 120. To do. FIG. 7 is a schematic view showing the protrusions 12 belonging to the rotating plate 10 in an enlarged manner when viewed from the direction along the rotating shaft 120. In the case where the protrusions 12 are arranged to be shifted, a gap is generated at the tip portion of the protrusions 12 when the protrusions 12 are shifted more than indicated by the broken line (reference numeral 12 (a)) shown in FIG. This is not preferable because an action such as cutting an object is likely to occur. On the other hand, as shown by the alternate long and short dash line (reference numeral 12 (b)) shown in FIG. 7, the tip 12 of the projection 12 is shifted along the rotation axis 120 by shifting it within a range smaller than the width of the tip of the projection 12. When viewed from the direction, a gap can be prevented from being generated. Further, when the protrusions 12 are shifted and stacked, the degree of shift (shift angle) is more preferably smaller than ½ of the width of the tip portion of the protrusion 12.

  In addition, with reference to FIG. 7, the protrusion side surface 16 of the protrusion 12 is defined. That is, as shown in FIG. 7, the surface that connects the surfaces that define the thickness of the protrusion 12 and that advances when rotated is defined as the protrusion side surface 16.

  As described above, the rotating unit 100 has a structure in which the protrusions 12 of the rotating plate 10 are stacked in the direction in which the rotating shaft 120 extends. Thereby, the opposing surface 130 which advances toward the direction which the rotation part 100 rotates is formed by the protrusion side surface 16 of the protrusion 12 which belongs to each of the laminated | stacked rotation plate 10 (refer FIG. 4). The facing surface 130 is a surface on which the protrusion side surface 16 is formed continuously by stacking the protrusions 12. By forming such a surface, when the rotating unit 100 is rotated, an effect of hitting (untapping) the defibrated material introduced into the defibrating unit 300 can be achieved. When the protrusions 12 are stacked while being shifted as described above, the facing surface 130 includes a spiral surface that includes the protrusion side surface 16 and a surface perpendicular to the rotation axis 120 that appears when the protrusions 12 are shifted. It becomes a stepped surface.

  The rotating unit 100 has a rotating shaft 120 that is perpendicular to the plane of the rotating plate 10. The rotating shaft 120 can be rotated around the rotation center 110 by an external driving device such as a motor (not shown). The rotating plate 10 can be rotated by rotating the rotating shaft 120. In the drawing, the rotating shaft 120 has an outer diameter shape that can be fitted into the fitting hole 13 of the rotating plate 10. Moreover, as long as the rotating plate 10 can be rotated by rotation of the rotating shaft 120, the rotating shaft 120 and the rotating plate 10 may employ other configurations.

  The size of the rotating unit 100 in the direction along the rotation axis 120 exerts an effect that the defibrated material is defibrated when the defibrated material is introduced into the defibrating unit 300 and the rotating unit 100 rotates. There is no particular limitation as long as it is possible. The size of the rotating unit 100 in the direction along the rotating shaft 120 can be adjusted by changing the thickness, the number of stacked layers, and the like of the rotating plate 10.

  As shown in FIGS. 4 and 6, the rotating unit 100 has four stepped portions 50 in which 24 rotating plates 10 are stacked, and five partition plates 30 between each step 50 and at both ends. Are laminated. In this example, all the rotating plates 10 have the same shape and the same thickness. Here, the protrusions 12 of the rotating plate 10 constituting one step 50 are stacked without substantially shifting in the circumferential direction, and in the adjacent step 50, each protrusion 12 is shifted in the circumferential direction. Has been placed. Further, the partition plate 30 is disposed between the step portion 50 and the adjacent step portion 50. For this reason, in each step part 50, it is laminated | stacked so that the protrusion 12 may contact | connect, and the protrusion 12 is arrange | positioned in the part in which the partition plate 30 is arrange | positioned, without contacting. In the rotating unit 100, a rotating plate 10, a partition plate 30, and a blade plate 40 (described later) are fastened by bolts 31 and nuts 32.

  Since the rotating unit 100 is laminated so that the plurality of rotating plates 10 are in contact with each other, the rotating plate 10 can be easily replaced. The cost at the time of replacement can be reduced.

1.1.2. Fixed part The defibrating part 300 of the present embodiment has a fixed part 200. The fixed part 200 is arranged away from the rotating part 100 in a direction away from the rotation center 110. The surface on the rotation center 110 side of the fixed part 200 has irregularities in the circumferential direction of the rotary part 100.

  The fixing unit 200 may be configured by a single member or may be configured by a plurality of members. As shown in FIG. 5, the fixing part 200 is formed by a plurality of fixing plates 20. As shown in FIGS. 2 and 3, the fixed plate 20 is a plate-like member and has an annular shape in plan view. On the inner surface of the ring of the fixed plate 20, projections and depressions are formed by projecting in a direction from the annular portion toward the rotation center 110 in plan view. The unevenness is formed at equal intervals, and the distance between the tip of each convex portion (the rotation center 110 side) and the rotation center 110 is the same. Similarly, the distance between the bottom of the concave portion between the convex portions (the side away from the rotation center 110) and the rotation center 110 is the same. As shown in FIG. 3, the surface enveloping the inner surface of the fixed plate 20 is on the outer side as viewed from the rotation center 110 than the surface of the locus drawn when the protrusion 12 of the rotating plate 10 rotates. Yes. In other words, in a plan view, the radius of the circle inscribed in the inner surface of the fixed plate 20 is larger than the radius of the circle drawn when the protrusion 12 of the rotating plate 10 rotates.

  In this specification, the distance obtained by subtracting the radius of the circle drawn when the protrusion 12 of the rotating plate 10 rotates from the radius of the circle inscribed in the inner surface of the fixed plate 20 in plan view is the gap. This is referred to as G (see symbol G in FIG. 3).

  In plan view, the surface enveloping the inner surface of the fixed plate 20 is preferably circular, and the center of the circle coincides with the rotation center 110 of the rotating unit 100 in consideration of assembly errors. In this way, since the size of the gap G formed by the rotating part 100 and the fixed part 200 does not vary greatly in the circumferential direction of the rotating shaft 120, a more stable defibrating process can be performed.

  As shown in FIGS. 2 and 3, the fixing plate 20 has a plurality of bolt holes 25 for holding the plurality of fixing plates 20 in a stacked state. Here, eight bolt holes 25 are formed in the fixing plate 20, but an appropriate number may be provided as necessary, and when the fixing plate 20 is laminated by other means, May be unnecessary.

  In the drawing, the outer shape of the fixed plate 20 has a substantially circular shape in plan view, but may be a shape including a polygon or a curve. If the outer shape of the fixed plate 20 is uneven, air cooling of the defibrating unit 300 may be promoted. Although not shown, protrusions and guides for aligning the positions of members (including adjacent fixing plates 20) stacked on the fixing plate 20 may be formed. It may be protrudingly provided.

  The thickness of the fixed plate 20 is not particularly limited. The thicknesses of the fixed plate 20 and the rotating plate 10 may be the same or different. When the thickness of the fixed plate 20 and the thickness of the rotating plate 10 are the same, both can be manufactured simultaneously by press punching from the same raw material (for example, a steel plate), thereby improving dimensional accuracy and productivity. be able to. In particular, the dimensional accuracy of the gap G can be improved. Further, the thickness of the fixed plate 20 is preferably the same in each part in the fixed plate 20. In the present specification, the thickness of the fixed plate 20 refers to the dimension of the fixed plate 20 in the direction in which the rotating shaft 120 extends when the rotating unit 100 is disposed.

  The size of the fixed plate 20 can be appropriately determined according to the processing capability of the defibrating unit 300 and the design of the gap G between the rotating plate 10 and the like.

  The material of the fixed plate 20 can be the same as that described in the section of the rotating plate 10. The fixed plate 20 can be formed by punching a cold rolled steel plate, a steel strip (SPCC, SPCD, SPCE, SPCF, SPCG) or the like with a press.

  In the fixed part 200, the fixed plate 20 is laminated so that the adjacent fixed plates 20 are in contact with each other in the direction in which the rotation center 110 (the rotation shaft 120) extends. In FIG. 5, 101 fixed plates 20 having the same thickness as the rotating plate 10 are stacked so as to be in contact with each other.

  The number of the fixing plates 20 included in the fixing unit 200 of the present embodiment is not limited as long as it is plural. The number of fixed plates 20 may be the same as or different from the number of rotating plates 10. In the present embodiment, the fixed portion 200 has a structure in which a plurality of fixed plates 20 are stacked in contact with the rotating shaft 120 of the rotating portion 100 in the direction in which the rotating shaft 120 extends. Therefore, as shown in FIG. 5, the fixing portion 200 has a straight tubular shape (tube shape) in which the central axis exists on the inner surface having the unevenness.

  When the fixing plates 20 are stacked, the fixing plates 20 are stacked such that the inner irregularities formed on the adjacent fixing plates 20 are in contact with each other. Therefore, due to the unevenness belonging to each of the stacked fixed plates 20, grooves that become uneven when the circumferential direction is traced are formed on the surface (inner surface) on the rotation center 110 side of the fixed portion 200. The shape and size of the unevenness are the same in FIG. 5, but may be different between the unevenness. In FIG. 5, the unevenness formed on the inner surface is laminated so that the unevenness of the adjacent fixed plate 20 does not shift in the circumferential direction, so that the inner surface of the fixed portion 200 extends in the direction in which the rotating shaft 120 extends. Parallel grooves are formed. Although not shown, the unevenness formed on the inner surface may be laminated so that the unevenness of the adjacent fixing plate 20 is shifted in the circumferential direction. In such a case, the inner surface of the fixing part 200 is rotated on the inner surface. A groove (helical groove) inclined with respect to the extending direction of the shaft 120 is formed. Although the aspect of the groove on the inner surface of the fixed portion 200 can be changed as described above, it can be arbitrarily designed in accordance with the conditions such as the type of material to be defibrated and the structure of the rotating portion 100.

  The unevenness formed on the surface of the fixed portion 200 on the rotation center 110 side has a function of generating an air flow that unwinds the defibrated material that has entered the gap G when the rotating portion 100 rotates within the fixed portion 200. Have. When the rotating part 100 rotates in the fixed part 200, when the protrusion 12 passes through the vicinity of the concave / convex concave part when viewed from the rotation center 110 side, an air current that rotates in the concave part is generated, and the air flow concerned The defibrated material is defibrated.

  The shape of the unevenness formed on the inner surface of the fixed part 200 or the shape of the unevenness formed on each of the fixed plates 20 is arbitrary as long as the above action can be achieved. Moreover, there is no restriction | limiting in particular also about the roughness of the unevenness | corrugation formed in the inner surface of the fixed plate 20, and it may be almost flat, and such a fixed plate 20 may be laminated | stacked with the fixed plate 20 which has a rough unevenness | corrugation. However, the order of stacking the fixing plates 20 is not limited at all.

  It is more preferable that the concavo-convex convex portion formed on the surface of the fixed plate 20 on the rotation center 110 side is not a sharp shape. For example, the convex portion has a trapezoidal shape, and a flat portion may be formed at the tip thereof. For example, in the case where the tip of the convex portion is thinner and sharper, when the defibrated material collides with the convex portion due to the rotation of the rotating unit 100, the convex portion bites into the defibrated material. There is. However, as shown in FIG. 3, a convex part having a tip angle of about 60 °, and even if the tip of the convex part is sharp, the defibrated material that collides with this is rotated. Such a shape may be used because it is more likely to collide from the side surface side of the convex portion than the collision from the rotation center 110 side due to the rotation of the portion 100. That is, when the convex portion comes into contact with the material to be defibrated, if the shape is difficult to bite into the material to be defibrated, this prevents the fibers contained in the material to be defibrated from being cut. It can suppress that the fiber of the defibrated material which passed 300 can become short. Moreover, by setting it as such a shape, the effect | action which strikes and loosens a to-be-defibrated material can also be heightened.

  The size of the fixed unit 200 in the direction along the rotation axis 120 has an effect of defibrating the defibrated material when the defibrated material is introduced into the defibrating unit 300 and the rotating unit 100 rotates. Is not particularly limited. The size of the fixing unit 200 in the direction along the rotation axis 120 can be adjusted by changing the thickness of the fixing plate 20 and the number of stacked layers. Further, the size of the fixing unit 200 in the direction along the rotation axis 120 may be the same as or different from the size of the rotation unit 100 in the direction along the rotation axis 120.

  As shown in FIG. 5, the fixing unit 200 of the present embodiment is configured by stacking 101 fixing plates 20 having the same thickness and the same shape. The rotating plate 10 (24 sheets × 4 (stepped part) = 96 sheets) and the partition plate 30 (5 sheets) constituting the rotating unit 100 are laminated with the same thickness. Therefore, the number of fixing plates 20 stacked in the fixing unit 200 is the same as the number of members stacked in the rotating unit 100, and the thickness is also the same. Therefore, the magnitude | size of the direction along the rotating shaft 120 of the rotation part 100 and the fixing | fixed part 200 is mutually the same. In the fixing portion 200, the fixing plate 20 is fastened by a bolt 31 and a nut 32.

  Further, in the case where the fixing portion 200 has a configuration in which the plurality of fixing plates 20 are in contact with each other, the fixing plate 20 can be easily replaced. Maintenance work and replacement costs can be reduced.

1.1.3. Structure of the defibrating unit As shown in FIG. 6, the defibrating unit 300 of the present embodiment includes the rotating unit 100 and the fixing unit 200 described above. In FIG. 6, the fixing portion 200 is schematically drawn in a cross section, and the inner surface is not illustrated with irregularities. The rotating unit 100 is disposed in a space inside the fixed unit 200 and is supported by the rotating shaft 120 in the fixed unit 200.

  The rotating shaft 120 is suspended at both ends by a bearing (bearing) (not shown) and can be freely rotated by a driving mechanism (not shown). Examples of such a driving mechanism include a mechanism that directly rotates the rotating shaft 120 by a motor, and a mechanism that rotates the rotating shaft 120 via a power transmission device such as a belt and pulley, a chain and sprocket, or a gear.

  Moreover, the defibrating unit 300 in FIG. 6 is provided with covers 310 on both ends in the direction in which the rotating shaft 120 extends. Here, the cover 310 closes both ends of the fixed portion 200 in the direction in which the rotation shaft 120 extends so that the rotation shaft 120 can pass therethrough, and forms a space for accommodating the defibrated material or the defibrated material therein. doing. The size of the space is not particularly limited. Here, an inlet pipe 320 and an outlet pipe 330 that communicate with the space formed by the cover 310 are provided. Further, here, the vane plate 40 is attached to the end of the rotary unit 100 on the side of the inlet pipe 320 in the direction along the rotation axis 120, and the vane 40 is partially erected in the direction along the rotation axis 120. 41 is provided.

  The inlet pipe 320 is a pipe for introducing a material to be defibrated into the defibrating unit 300, and the outlet pipe 330 is a defibrated material defibrated by the rotating unit 100 (rotor 90) from the defibrating unit 300. This is the piping to be discharged.

  In the drawing, the inlet opening 321 that is the tip of the inlet pipe 320 exists in the vicinity of the rotating shaft 120, and the outlet opening 331 that is the tip of the outlet pipe 330 exists at a position away from the rotating shaft 120. It is not limited to such an embodiment, and each pipe can be appropriately arranged. Moreover, although the blade | wing 41 is arrange | positioned here at the inlet piping 320 side of the rotation part 100, you may arrange | position at the outlet piping 330 side.

  The blade 41 has at least an action of moving the material to be defibrated or the defibrated material from the inlet pipe 320 side to the outlet pipe 330 side, but the blower 41 is connected to either or both of the inlet pipe 320 side and the outlet pipe 330 side. When a wind feed mechanism such as a blower or a wind suction mechanism is provided, this configuration is not necessarily required. Further, in this example, as shown in FIG. 4, the blade 41 has a shape in which six portions of the blade plate 40 stacked adjacent to the partition plate 30 are bent and erected in the direction along the rotation shaft 120. It has become. However, the shape is not limited to this, and the blades 41 may be installed on the partition plate 30 by welding or the like. Further, the shape of the blade 41 is not limited, and can be any shape. Further, when the blade plate 40 can block the meat stealer 14 of the rotary plate 10, the blade plate 40 can also function as the partition plate 30, in which case the partition plate on the side where the blade plate 40 is provided. 30 can not be installed.

1.1.4. Operation of the defibrating unit The defibrating unit 300 rotates the rotating unit 100 by rotating the rotating shaft 120, and guides the material to be defibrated to the gap G between the rotating unit 100 and the fixed unit 200 by airflow. The defibrated material can be subjected to dry defibrating treatment. The rotation speed of the rotating unit 100 (the number of rotations per minute (rpm)) is determined by the dry defibrating processing throughput, the residence time of the material to be defibrated, the degree of defibrating, the rotating unit 100, the fixed unit 200, and the other components. It can be set appropriately in consideration of conditions such as the shape and size of the member. In the defibrating unit 300 having the structure shown in FIG. 6, for example, the speed is 100 rpm to 11000 rpm, preferably 500 rpm to 9000 rpm, more preferably 1000 rpm to 8000 rpm. Further, the rotational speed need not be constant, and acceleration, deceleration, etc. may be performed according to various conditions as appropriate.

1.1.5. Residence time of the defibrated material in the defibrating unit The defibrated material is introduced from the inlet pipe 320 of the defibrating unit 300 and discharged from the outlet pipe 330 as the defibrated material. At this time, the residence time of the defibrated material in the gap G between the rotating unit 100 and the fixed unit 200 (that is, the period existing in the gap G) is set in consideration of the type of defibrated material. The residence time is set in consideration of the balance of the rotation speed of the rotating unit 100, the configuration, shape, size, and the like of the rotating unit 100 and the fixed unit 200.

  When the material to be defibrated is difficult to be defibrated, it is preferable to set the residence time long if other conditions are the same. On the other hand, when the material to be defibrated is easily defibrated, it is preferable to set the residence time short if other conditions are the same. On the other hand, the length of the residence time can be changed also when the defibrated material is a predetermined one and the degree of defibrating the defibrated material or changing the throughput. In addition, the residence time generally becomes longer when the rotational speed and the amount of air to be passed are reduced (lowering the blower (blower) capacity to reduce the moving speed of the material to be defibrated), and the defibrating action is further enhanced. However, even when the rotational speed and the air volume are constant, the residence time can be increased by the following method.

  Among the means for lengthening the residence time, those relating to the shapes of the rotating unit 100 and the fixed unit 200 include the following. (1) Increasing the thickness and number of the rotating plate 10 and the fixed plate 20 to increase the distance from the end of the gap G on the inlet pipe 320 side to the end of the outlet pipe 330 side, (2) at least some stepped portions 50, the protrusions 12 of the rotating plate 10 are arranged at different angles in the circumferential direction of the rotating shaft 120, and the rotation time of the rotating part 100 increases the residence time in a part of the stepped parts 50, (3) rotation Providing the partition plate 30 in the portion 100 to form a barrier for the article to be defibrated to move, (4) increasing the number of stepped portions 50 (that is, the number of the partition plates 30) in the case of (3); (5) Changing the shape and size of the blade 41 to reduce the moving speed of the material to be defibrated.

  If the residence time is increased, the dry defibrating process by the defibrating unit 300 can be performed more reliably. Further, according to the defibrating unit 300 of the present embodiment, since the action of cutting or crushing the fibers generated from the material to be defibrated is small, even if the residence time is increased, the fibers contained in the defibrated material Don't make the length too short. Thereby, the intensity | strength of the sheet | seat finally manufactured can fully be raised.

1.1.6. Step part The rotation part 100 which the defibrating part 300 of this embodiment has has the step part 50. FIG. The step portion 50 is formed by a stacked body of a plurality of rotating plates 10 and partition plates 30 stacked at both ends thereof. A partition plate 30 is disposed between the adjacent step portions 50. The number of stepped portions 50 formed in the rotating unit 100 is arbitrary. As shown in FIGS. 4 and 6, four step portions 50 are formed in the present embodiment. In the rotating unit 100 of the present embodiment, the respective step portions 50 may be referred to as the first to fourth steps from the inlet pipe 320 side.

  As described above, the rotating plates 10 belonging to one step 50 are stacked so as to be in contact with each other. On the other hand, the partition plate 30 disposed between the step portions 50 is provided so as to be in contact with the rotary plate 10, but is the same as the circle drawn by the tip of the protrusion 12 of the rotary plate 10 when the rotary shaft 120 rotates? , Has a flat plate shape that becomes a smaller circle. That is, the size of the partition plate 30 is the same size as the tip of the projection 12 of the rotating plate 10 or the size inside the tip of the projection 12.

  The material and thickness of the partition plate 30 can be the same as those of the rotating plate 10. The partition plate 30 may have a meat stealer or a bolt hole. However, when the rotary plate 10 has the meat stealer 15, the partition plate 30 provided at the end portion of the partition plate 30 in the direction along the rotation shaft 120 of the rotary unit 100 is the part of the meat stealer 15 of the rotary plate 10. The shape should be covered and closed.

  The shape of the partition plate 30 may be a shape in which at least a part of a groove extending in the direction along the rotation shaft 120 formed by stacking the protrusions 12 of the rotating plate 10 is closed and all the grooves are closed. The shape of the partition plate 30 is a shape that is not outward from the rotation center 110 with respect to the protrusion 12 of the rotation plate 10.

  When the partition plate 30 is provided and a plurality of step portions 50 are formed, when the defibrated material moves to the adjacent step portions 50, the partition plate 30 passes through the vicinity of the tip of the protrusion 12. Will move. Therefore, compared with the case where the partition plate 30 is not provided, the frequency at which the material to be defibrated passes near the tip of the protrusion 12 is increased, and the defibrating process can be performed more reliably. In addition, as described above, by providing the partition plate 30, the residence time of the material to be defibrated can be lengthened, so that the defibrating treatment can be performed more reliably.

1.1.7. Gap Gap G is drawn when the protrusion 12 of the rotating plate 10 rotates from the radius of a circle inscribed in the inner surface of the fixed plate 20 when the rotating unit 100 is installed inside the fixed unit 200. This is the length obtained by subtracting the radius of the circle (see Fig. 3).

  In the defibrating unit 300 of the present embodiment, the gap G is set larger than the thickness of the defibrated material. Since the gap G is larger than the thickness of the material to be defibrated, it is suppressed and polished when the material to be defibrated enters the gap (gap between the rotating part 100 and the fixed part 200). Crushing is suppressed. The size of the gap G is preferably about 2 to 300 times the thickness of the material to be defibrated.

  The gap between the rotating part 100 and the fixed part 200 can be adjusted as appropriate by changing the outer diameter of the rotating plate 10 and the inner diameter of the fixed plate 20.

  In the defibrating unit 300 described above, since the protrusions 12 are stacked so as to be in contact with the direction in which the rotation shaft 120 extends, the direction intersecting the direction in which the protrusions 12 are stacked (crosses the thickness direction of the rotating plate 10). The facing surface 130 formed by the plurality of protrusions 12 is formed in the direction). And when the rotating part 100 rotates, the facing surface 130 advances in the rotation direction, so that the defibrated material can collide and a high-speed air flow is formed in the rotation direction. Thereby, the effect | action which cuts the fiber produced from a material to be defibrated is suppressed, and the material to be defibrated can be defibrated so that the fiber length of the obtained defibrated material is not too short.

1.2. Other Configurations The sheet manufacturing apparatus 1000 according to the present embodiment has a configuration in which at least a part of the defibrated material that has passed through the defibrating unit 300 described above is deposited and heated. FIG. 8 is a schematic diagram showing the sheet manufacturing apparatus 1000 of the present embodiment.

  As shown in FIG. 8, the sheet manufacturing apparatus 1000 includes a crushing unit 400, a defibrating unit 300, a classifying unit 500, a sorting unit 600, a resin supply unit 700, a loosening unit 800, and a sheet forming unit 900. And including.

  The crushing unit 400 cuts raw materials such as a pulp sheet and input paper (for example, A4-sized waste paper) into air pieces into pieces. Although the shape and size of the strip are not particularly limited, for example, it is a strip of several cm square. In the example shown in the figure, the crushing unit 400 has a crushing blade 401, and the charged raw material can be cut by the crushing blade 401. The crushing unit 400 may be provided with an automatic input unit (not shown) for continuously supplying raw materials. The crushing unit 400 is provided as necessary, and need not be provided when a raw material that does not need to be cut is used. In addition, the crushing unit 400 does not perform the defibrating process, but performs a cutting process. Even if a slight defibrating action occurs, the pulverizing unit 400 performs the defibrating process (disentangling in a fibrous form). The function is different from the processing. As a specific example of the crushing part 400, a shredder can be illustrated.

  The strips cut by the crushing unit 400 are received by the hopper 405 and then introduced from the inlet opening 321 of the defibrating unit 300. The defibrating unit 300 performs a defibrating process on a strip (a material to be defibrated). The defibrating unit 300 generates a defibrated material that has been unraveled into a fibrous shape by defibrating the strip. It becomes easy to defibrate in the defibrating part 300 by making it into a fine piece in the crushing part 400. FIG. Further, by making the strips into small pieces by the crushing portion 400, it is easy to pass through the gap G or to enter between the protrusions 12 of the rotating plate 10. The generated defibrated material is discharged from the outlet opening 331 and introduced into the classification unit 500.

  The classification unit 500 separates and removes resin particles, ink particles, and the like from the defibrated material as necessary. As the classification unit 500, an airflow classifier is used. The airflow classifier generates a swirling airflow and separates it by centrifugal force and the size and density of what is classified, and the classification point can be adjusted by adjusting the speed and centrifugal force of the airflow. Specifically, a cyclone, elbow jet, eddy classifier, or the like is used as the classification unit 500. In particular, since the structure of the cyclone is simple, it can be suitably used as the classification unit 500.

  The defibrated material classified by the classification unit 500 is introduced into the sorting unit 600. Unnecessary material separated by the classification unit 500 is discharged to the outside of the classification unit 500 through the discharge pipe 501. In the case of using waste paper as a raw material, resin particles and the like are discharged to the outside through the discharge pipe 501, so even if the resin is supplied by a resin supply unit 700 described later, the resin becomes excessive with respect to the defibrated material. Can be prevented. Further, when the raw material is not waste paper but a pulp sheet, the sheet manufacturing apparatus 1000 may not include the classification unit 500.

  The sorting unit 600 sorts the defibrated material that has been defibrated by the defibrating unit 300 into “passing matter” that passes through the sorting unit 600 and “residue” that does not pass through in the air. As the sorting unit 600, various types of sieves can be used. The sorting unit 600 can sort and pass a fiber having a length that can pass through the opening of the sieve from the defibrated material that has been defibrated. The sorting unit 600 is not an essential component, and is provided according to the state of the defibrated material necessary for the sheet to be manufactured. In addition, the long fibers and the residue that has not been defibrated and has not passed through the sorting unit 600 are conveyed to the hopper 405 via the return channel 602 as shown in FIG. You may make it return to the fine part 300. FIG.

  The passing material that has passed through the first opening 42 of the sorting unit 600 is conveyed to the inlet 801 of the loosening unit 800 via the resin supply unit 700. The resin supply unit 700 is provided with a supply port 701 for supplying a resin that binds the fibers together.

  The resin supply unit 700 supplies the resin from the supply port 701 in the air. That is, the resin supply unit 700 supplies the resin to the path from the sorting unit 600 toward the unwinding unit 800 (between the sorting unit 600 and the unraveling unit 800). The resin supply unit 700 is not particularly limited as long as the resin can be supplied to the conveyance path, but a screw feeder, a circle feeder, or the like is used. Then, the defibrated material and the resin are mixed.

  The resin supplied from the resin supply unit 700 is a resin for binding a plurality of fibers. At the time when the resin is supplied to the path, the plurality of fibers are not bound. The resin is cured when passing through a sheet forming unit 900 described later, and binds a plurality of fibers.

  The resin supplied from the resin supply unit 700 is a thermoplastic resin or a thermosetting resin. The resin supplied from the resin supply unit 700 may be fibrous or powdery. The amount of resin supplied from the resin supply unit 700 is appropriately set according to the type of sheet to be manufactured. In addition to the resin that binds the unraveled fiber, depending on the type of sheet to be produced, a colorant for coloring the unraveled fiber and to prevent aggregation of the unraveled fiber The anti-agglomeration material may be supplied.

  The loosening unit 800 loosens tangled passing objects. Further, the loosening unit 800 loosens the entangled resin when the resin supplied from the resin supply unit 700 is fibrous. Further, the loosening unit 800 uniformly deposits a passing material and a resin on a deposition unit described later.

  As the loosening portion 800, a sieve can be used. The fibers and the resin that have passed through the loosening portion 800 are deposited on the deposition portion described later with a uniform thickness and density. The loosening portion 800 is not necessarily indispensable when there is no entangled fiber or when the tangled portion is deposited without untangling.

  The defibrated material and the resin that have passed through the loosening unit 800 are deposited on the deposition unit 901 of the sheet forming unit 900. As illustrated in FIG. 8, the sheet forming unit 900 includes a stacking unit 901, a stretching roller 902, a heater roller 903, a tension roller 904, and a take-up roller 905. The sheet forming unit 900 forms the sheet S using the defibrated material and the resin that have passed through the loosening unit 800. Hereinafter, the sheet forming unit 900 will be specifically described.

  The deposition unit 901 of the sheet forming unit 900 receives and deposits the defibrated material and the resin that have passed through the loosening unit 800. The deposition part 901 is located below the loosening part 800. The depositing unit 901 receives defibrated material and resin, and is, for example, a mesh belt. The mesh belt is formed with a mesh stretched by a stretch roller 902. The deposition unit 901 moves as the stretching roller 902 rotates. While the deposition part 901 continuously moves, the defibrated material and the resin are continuously piled up from the loosening part 800, whereby a web having a uniform thickness is formed on the deposition part 901.

  The defibrated material and the resin deposited on the deposition unit 901 of the sheet forming unit 900 are heated and pressurized by passing through the heater roller 903 as the deposition unit 901 moves. By heating, the resin functions as a binder to bind the fibers together, thin by pressurization, and further pass through a calendar roller 904 to smooth the surface, and the sheet S is formed. In the illustrated example, the sheet S is wound up by a winding roller 905.

  Thus, the sheet S can be manufactured.

  The sheet manufactured by the sheet manufacturing apparatus 1000 mainly refers to a sheet. However, it is not limited to a sheet shape, and may be a board shape or a web shape. The sheet in this specification is divided into paper and non-woven fabric. The paper includes a mode in which pulp or used paper is used as a raw material and is formed into a thin sheet, and includes recording paper for writing and printing, wallpaper, wrapping paper, colored paper, drawing paper, Kent paper, and the like. Nonwoven fabric is thicker than paper or low in strength, and includes general nonwoven fabric, fiber board, tissue paper, kitchen paper, cleaner, filter, liquid absorbent material, sound absorber, cushioning material, mat, and the like. The raw material may be plant fibers such as cellulose, chemical fibers such as PET (polyethylene terephthalate) and polyester, and animal fibers such as wool and silk.

  In addition, although not shown, a moisture sprayer for spraying and adding moisture to the deposit deposited in the deposition unit 901 may be provided. Thereby, the intensity | strength of the hydrogen bond at the time of shape | molding the sheet | seat S can be made high. The spray addition of moisture is performed on the deposit before passing through the heater roller 903. Starch, PVA (polyvinyl alcohol), or the like may be added to the moisture sprayed by the moisture sprayer. Thereby, the strength of the sheet S can be further increased.

  In the above example, the form in which the sheet S is taken up by the take-up roller 905 has been described. However, the sheet S may be cut into a desired size by a cutting machine (not shown) and stacked on a stacker or the like.

  In the present application, the same and uniform includes a case where the difference is within a range of about ± 10% in consideration of a processing error, accumulation of raw material dimensional accuracy, and the like.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and can be appropriately changed without departing from the spirit of the present invention.

  The sheet manufacturing apparatus 1000 of the present invention can manufacture a sheet if at least the defibrating unit 300 and the sheet forming unit 900 are provided. The crushing unit 400, the classification unit 500, the sorting unit 600, the resin supply unit 700, the loosening unit 800, and the like may be added to the configuration as necessary. Further, in the present application, “used paper” refers mainly to printed paper, but may include paper that has not been printed but has passed through a printing apparatus or unused paper.

  The present invention is not limited to the above-described embodiments, and various modifications can be made. For example, the present invention includes substantially the same configuration (for example, a configuration having the same function, method and result, or a configuration having the same purpose and effect) as the configuration described in the embodiment. In addition, the invention includes a configuration in which a non-essential part of the configuration described in the embodiment is replaced. In addition, the present invention includes a configuration that exhibits the same operational effects as the configuration described in the embodiment or a configuration that can achieve the same object. In addition, the invention includes a configuration in which a known technique is added to the configuration described in the embodiment.

  DESCRIPTION OF SYMBOLS 10 ... Rotating plate, 11 ... Base, 12 ... Projection, 13 ... Mating hole, 14 ... Meat stealing, 15 ... Bolt hole, 16 ... Side surface of protrusion, 20 ... Fixed plate, 25 ... Bolt hole, 30 ... Partition plate, DESCRIPTION OF SYMBOLS 31 ... Bolt, 32 ... Nut, 40 ... Blade, 41 ... Blade, 50 ... Step part, 100 ... Rotating part, 110 ... Center of rotation, 120 ... Rotating shaft, 130 ... Opposite surface, 200 ... Fixed part, 300 ... Solution Textile part, 310 ... Cover, 320 ... Inlet pipe, 321 ... Inlet opening, 330 ... Outlet pipe, 331 ... Outlet opening, 400 ... Roughing part, 401 ... Roughing blade, 405 ... Hopper, 500 ... Classification part, 501 ... Discharge pipe, 600 ... sorting part, 602 ... return flow path, 700 ... resin supply part, 701 ... supply port, 800 ... unraveling part, 801 ... introduction port, 900 ... sheet molding part, 901 ... deposition part, 902 ... stretch Roller, 903 ... He Over the roller, 904 ... tension roller, 905 ... the take-up roller, 1000 ... sheet manufacturing apparatus.

Claims (4)

A defibrating device for rotating a rotating part inside a fixed part to dry defibrated material,
A gap is provided between the fixed portion and the rotating portion that rotates inside the fixed portion.
The rotating part includes a plurality of rotating plates having a plurality of protruding parts protruding in a direction away from the rotation center axis of the rotating part, and the rotating plates are arranged in a direction in which the rotation center axis extends. A defibrating device, wherein the layers are laminated so as to be in contact with each other. The defibrating apparatus according to claim 1, wherein unevenness is provided on a surface of the fixed portion on the rotation center side. The defibrating apparatus according to claim 2, wherein the fixing portion is formed by stacking the fixing plates having the unevenness in a direction in which the rotation center axis extends. Covers that close both ends of the rotating part are provided in the direction in which the rotation center axis extends, and an inlet pipe into which the defibrated material is introduced and the defibrated defibrated material are discharged to the cover. The defibrating apparatus according to any one of claims 1 to 3, wherein an outlet pipe is provided.

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