JP2015071256A - Sheet production device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small sheet production device.SOLUTION: The sheet production device comprises: a web forming part for forming a web including fiber and resin; and plural fixation parts for performing at least one of heating and cooling of the web. A transport angle in a range of 0° or more and 90° or less among an angle formed by a transport surface when the web is transported from the respective fixation parts and a horizontal surface is configured so that the transport angle on the fixation part disposed on an upstream side to the web transport direction is larger than that on the fixation part disposed on a downstream side.

Description

  The present invention relates to a sheet manufacturing apparatus.

  Conventionally, a mesh belt conveyor that transports the web (pulp sheet in Patent Document 1), a transport conveyor that is disposed downstream of the mesh belt conveyor with respect to the web transport direction, and that inherits and transports the web from the mesh belt conveyor; There is known a regenerated pulp molding and drying apparatus equipped with a heating press machine for heating and drying a web conveyed by a conveyor (see, for example, Patent Document 1).

JP 2009-299217 A

  However, in the above recycled pulp molding and drying apparatus, the conveyor is disposed in a substantially horizontal direction with respect to the mesh belt conveyor, so that the apparatus configuration becomes longer in the horizontal direction and the installation area of the apparatus becomes larger. was there.

  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 web forming unit that forms a web containing fibers and a resin, and a plurality of fixing units that perform at least one of heating and cooling of the web. In the manufacturing apparatus, a conveyance angle indicated by 0 to 90 degrees out of an angle formed between a conveyance surface and a horizontal surface when conveying the web from each fixing unit is upstream of the conveyance direction of the web. The conveyance angle in the fixing unit arranged on the side is larger than the conveyance angle in the fixing unit arranged on the downstream side.

  When a plurality of fixing portions are provided from the upstream side to the downstream side in the web conveyance direction, and each of the fixing portions is configured to gradually increase the rigidity of the web, the upstream side web rigidity is determined by the downstream side web rigidity. Lower than the stiffness of Therefore, for example, when the web is transported in the horizontal direction, a transport failure occurs due to buckling or the like. Therefore, according to the above configuration, since the conveyance angle formed by the conveyance surface and the horizontal plane is relatively large on the upstream side in the conveyance direction of the web, the web is easily conveyed by its own weight. Thereby, even a web having a relatively low rigidity can be reliably conveyed without buckling. On the other hand, since the strength of the web itself is increased through the fixing unit on the downstream side in the web conveyance direction, the web can be conveyed without buckling even if the conveyance angle between the conveyance surface and the horizontal surface is reduced. . In addition, by reducing the transport angle between the transport surface and the horizontal surface on the upstream side and decreasing on the downstream side, the length of the transport path in the horizontal direction is shortened, and the length in the vertical direction is shortened. It can be downsized.

  Application Example 2 In the sheet manufacturing apparatus according to the application example, there are three or more fixing units, and the conveyance angle formed by the conveyance surface and the horizontal plane when conveying the web from the fixing unit is: It is characterized by being larger on the upstream side.

  According to this configuration, the transport angle formed by the transport surface for transporting the web and the horizontal surface is larger toward the upstream side. In other words, the conveyance angle formed by the conveyance surface and the horizontal surface gradually becomes gentle (small) from the upstream side to the downstream side in the web conveyance direction. Thereby, a web can be efficiently conveyed, without buckling in the conveyance path in the middle.

  Application Example 3 In the sheet manufacturing apparatus according to the application example, the conveyance surface is a conveyance guide surface.

  According to this configuration, the conveyance surface is configured by the surface of the conveyance guide. That is, the conveying surface is not a device such as a conveying belt. Therefore, since no special device is arranged in the web conveyance path, the device configuration can be simplified and the size can be reduced.

  Application Example 4 In the sheet manufacturing apparatus according to the application example described above, a cutting unit that cuts the web is provided on the upstream side of the plurality of fixing units with respect to the web conveyance direction.

  According to this configuration, it is possible to prevent the web from being cut or damaged by the weight of the continuous web-like body (sheet state) during the conveyance process. Further, when the web is cut, a tip portion is formed on the web. And the said conveyance path | route can suppress generation | occurrence | production of the buckling of the said web, the catch of the front-end | tip part, etc. of a web, and can improve conveyance property.

  Application Example 5 In the sheet manufacturing apparatus according to the application example described above, the sheet is always conveyed downward in the vertical direction from the cutting unit to the plurality of fixing units.

  According to this configuration, the web is always conveyed vertically downward between the plurality of fixing units from the cutting unit. That is, the web is not conveyed in the horizontal direction between the cutting unit and the plurality of fixing units. For this reason, the weight of the web always acts and can be easily transported.

Schematic which shows the structure of a sheet manufacturing apparatus. The schematic diagram which shows the partial structure of a sheet manufacturing apparatus.

  Hereinafter, 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, 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 web forming unit that forms a web including fibers and a resin, and a plurality of fixing units that perform at least one of heating and cooling of the web. Of the angles formed by the conveyance surface and the horizontal plane when conveying the web from each fixing unit, the conveyance angle indicated by 0 degrees or more and 90 degrees or less is in the fixing section arranged on the upstream side with respect to the web conveyance direction. The conveyance angle is set to be larger than the conveyance angle in the fixing unit disposed on the downstream side. In addition, the web concerning this embodiment says the structure form of the object containing a fiber and resin. Accordingly, even when the shape or the like is changed during heating, pressurization, cutting or transporting, the web is shown as a web. Hereinafter, the configuration of the sheet manufacturing apparatus will be specifically described.

  FIG. 1 is a schematic diagram illustrating a configuration of a sheet manufacturing apparatus according to the present embodiment, and FIG. 2 is a schematic diagram illustrating a partial configuration of the sheet manufacturing apparatus. As shown in FIG. 1, the sheet manufacturing apparatus 1 includes a supply unit 10, a crushing unit 20, a defibrating unit 30, a classification unit 40, a receiving unit 50, an additive charging unit 60, and a web forming unit. 70, a transport unit 100, a fixing unit, and the like. Furthermore, in this embodiment, the cutting part 110 is provided.

  The supply unit 10 supplies the used paper Pu to the crushing unit 20. The supply 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 supplied to the sheet manufacturing apparatus 1 is, for example, A4 size paper that is currently mainstream in offices.

  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. Then, the divided coarsely crushed paper is supplied to the defibrating unit 30 via the pipe 201.

  The defibrating unit 30 includes a rotating rotary blade (not shown), and defibrates the crushed paper supplied from the crushing unit 20 in a fiber shape. Note that the defibrating unit 30 of the present embodiment performs defibrating in a dry manner. By the defibrating process of the defibrating unit 30, printed ink, toner, a material for application to paper such as a bleeding prevention material, etc., become tens of μm or less and separate from the fibers (hereinafter referred to as “ink particles” "). Therefore, the defibrated material that comes out from the defibrating unit 30 is fibers and ink particles obtained by defibrating the paper pieces. Then, the airflow is generated by the rotation of the rotary blade, and the fiber defibrated via the pipe 202 is carried on the airflow and conveyed to the classification unit 40. In addition, when using the dry type defibrating part 30 which is not equipped with a wind generation mechanism, what is necessary is just to provide separately the airflow generator which generates an airflow from the crushing part 20 toward the defibrating part 30. FIG.

  The classifying unit 40 classifies the defibrated material into ink particles and fibers. In the present embodiment, a cyclone as the classifying unit 40 (hereinafter, described as a cyclone 40 as the classifying unit) is applied, and the conveyed fibers are classified into air currents into ink particles and deinked fibers (deinked defibrated material). To do. Note that another type of airflow classifier may be used instead of the cyclone 40. In this case, as an airflow classifier other than the cyclone 40, for example, an elbow jet, an eddy classifier, or the like 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 cyclone 40 has a structure in which a tangential input type cyclone is relatively simple. The cyclone 40 of the present embodiment includes an introduction port 40a introduced from the defibrating unit 30, a cylindrical portion 41 with the introduction port 40a attached in a tangential direction, a conical portion 42 following the lower portion of the cylindrical portion 41, and the conical portion 42. A lower outlet 40b provided in the lower portion and an upper exhaust port 40c for discharging fine powder provided in the upper center of the cylindrical 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 introduction port 40a of the cyclone 40 is turned into a circular motion in the cylindrical portion 41, and centrifugal force is applied. , It moves to the inverted conical part 42. Further, the separated ink particles are led to the upper exhaust port 40c as fine powder together with air, and deinking proceeds. Then, the short fiber mixture containing a large amount of ink particles is discharged from the upper exhaust port 40 c of the cyclone 40. Then, the short fiber mixture containing a large amount of discharged ink particles is collected in the receiving unit 50 via the pipe 203 connected to the upper exhaust port 40 c of the cyclone 40. On the other hand, the deinked fibers are conveyed from the lower outlet 40b of the cyclone 40 toward the web forming unit 70 through the pipe 204. Note that suction may be performed from the upper exhaust port 40c.

  Further, in the middle of the pipe 204 through which the deinked fiber is conveyed from the cyclone 40 to the web forming unit 70, a resin (for example, a fusion resin or a thermosetting resin) is used for the deinked fiber to be conveyed. An additive charging unit 60 for adding an additive is provided. In addition to the fusion resin, for example, a flame retardant, a whiteness improver, a sheet strength enhancer, a sizing agent, and the like can be added as the additive. These additives are stored in the additive storage unit 61 and are charged from the charging port 62 by a charging mechanism (not shown).

  The web forming unit 70 forms a web containing fibers and resin introduced from the pipe 204. The web forming unit 70 has a mechanism for uniformly dispersing the fibers in the air and a mechanism for depositing the dispersed fibers on the mesh belt 73.

  First, as a mechanism for uniformly dispersing the fibers in the air, the web forming unit 70 is provided with a forming drum 71 into which the fibers and the resin are charged. Then, the resin (additive) can be uniformly mixed in the fiber by rotationally driving the forming drum 71. A screen having a plurality of small holes is provided on the surface of the forming drum 71. Further, a rotatable needle roll is provided inside the forming drum 71 so as to float the input fibers. With such a configuration, the fibers that have passed through the small holes can be uniformly dispersed in the air.

  On the other hand, below the forming drum 71, an endless mesh belt 73 in which a mesh stretched by stretch rollers 72 (four stretch rollers 72a to 72d in this embodiment) 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.

  Then, when the entangled fibers are introduced from the cyclone 40 into the forming drum 71 of the web forming unit 70, the fibers and the resin are loosened by a needle roll or the like. The loosened fibers pass through a small hole screen on the surface of the forming drum 71 and 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 the web W in which fibers and resin are deposited in a long shape. By continuously dispersing from the forming drum 71 and moving the mesh belt 73, a sheet-like web W is formed. The mesh belt 73 may be metallic, resinous, or non-woven fabric, and may be anything as long as fibers can be deposited and an air stream can pass therethrough. When the mesh hole diameter of the mesh belt 73 is too large, fibers enter between the meshes, resulting in unevenness when the web (sheet) is formed. On the other hand, when 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 transport unit 100 according to the present embodiment is a component that configures a transport path 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, a later-described transport belt 101, various rollers, transport guides 107, 108, 109, and the like function as a part of the transport unit 100. 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 transferred from the mesh belt 73 to the transport belt 101 stretched by the stretch roller 106, and is transported according to the transport direction (arrow in the figure).

  A fixing unit is disposed on the downstream side of the conveyance belt 101 in the conveyance direction of the web W. The fixing unit heats or cools the web W. In the present embodiment, a plurality of fixing units are arranged.

  Specifically, in the present embodiment, three fixing units are arranged. These fixing units include a first heating unit 120a and a second heating unit 120b that heat the web W as a fixing unit, and a cooling unit 150 that cools the web W. The first heating unit 120a is disposed upstream of the web W conveyance direction, the second heating unit 120b is disposed downstream of the first heating unit 120a in the web W conveyance direction, and the second heating unit The cooling unit 150 is arranged on the downstream side in the conveyance direction of the web W of 120b. Thus, by arranging a plurality of fixing portions and allowing the web W to pass through the respective fixing portions, the rigidity of the web W can be steadily increased.

  The first heating unit 120a and the second heating unit 120b heat the web W to bind (fix) the fibers contained in the web W via a resin. Each of the first and second heating units 120a and 120b is provided with a pair of heating rollers 121. A heating member such as a heater is provided at the center of the rotating shaft of the heating roller 121, and the web W can be heated and pressurized by passing the web W between the pair of heating rollers 121. it can. The web W is heated and pressurized by the pair of heating rollers 121, 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. Furthermore, in this embodiment, by providing the first heating unit 120a and the second heating unit 120b in two places on the conveyance path of the web W, a sufficient time for heating and pressurization is ensured, and the strength of the web W is ensured. Can be improved. In addition, since the first and second heating units 120a and 120b are configured as the heating roller 121, for example, the web is continuous compared to the case where the first and second heating units 120a and 120b are configured as a plate-like press device. The sheet can be formed while being conveyed. In the case of using a plate-like press device, a buffer unit for temporarily sagging the web to be transported during pressing is required. That is, the whole structure of the sheet manufacturing apparatus 1 can be reduced in size by using the heating roller.

  The cooling unit 150 cools the web W. Exactly what is not heated (part). The cooling unit 150 is not provided with a heating unit such as a heater. The cooling unit 150 of this embodiment includes a pair of cooling rollers 151. Therefore, the cooling unit 150 cools the web W and pressurizes the web W. Thereby, the temperature of the web W is lowered and the strength of the web W is improved. The cooling roller 151 has, for example, an air cooling mechanism including a hollow metal core and an air injection unit that injects air into the hollow part. Thus, the cooling roller 151 is configured not to rise above the temperature of the heated web W when it comes into contact with the web W heated by the heating unit 120. More specifically, the heat of the web W is dissipated through the cooling roller 151 by the contact between the cooling roller 151 and the web W, so that the temperature of the web W is close to normal temperature. As a result, the web W is cooled, and the melted resin is cooled and solidified, so that the fibers are reliably bound to each other through the resin. The cooling unit 150 is not limited to the air cooling method of the present embodiment, and may not be cooled as long as heat can be radiated properly. Moreover, when cooling, a water cooling system may be used, for example.

  A first cutting unit 110 serving as a cutting unit for cutting the web W is disposed upstream of the fixing unit in the conveyance direction of the web W. The 1st cutting part 110 of this embodiment cut | disconnects the web W in the direction which cross | intersects the conveyance direction of the web W conveyed. Specifically, the first cutting unit 110 is disposed on the upstream side of the first heating unit 120a. The first cutting unit 110 includes a cutter, and cuts (cuts) the long web W into sheets (sheets) according to a cutting position set to a predetermined length. Thereby, there is a possibility that the web W may be cut by the weight of the continuous web W during conveyance, but by cutting it into a single sheet, it is possible to prevent the web W from being cut by its own weight. The web W is always conveyed downward in the vertical direction from the first cutting unit 110 to the plurality of fixing units.

  The conveyance angle indicated by 0 to 90 degrees out of the angle formed between the conveyance surface and the horizontal plane when conveying the web from each fixing unit is the fixing unit arranged on the upstream side with respect to the web conveyance direction. The conveyance angle at is larger than the conveyance angle at the fixing unit disposed on the downstream side. Here, the conveyance surfaces according to the present embodiment are the surfaces 107a, 108a, 109a of the conveyance guides 107, 108, 109 provided in the conveyance path of the web W. Specifically, guides 107, 108, and 109 for conveying the web W are arranged between the fixing units (the first heating unit 120a, the second heating unit 120b, and the cooling unit 150). The guide 107 is disposed at a position corresponding to the first heating unit 120a, the guide 108 is disposed at a position corresponding to the second heating unit 120b, and the guide 109 is disposed at a position corresponding to the cooling unit 150. Each surface 107a, 108a, 109a corresponds to each guide 107, 108, 109 when the web W is conveyed. Here, when the web W is conveyed, guides 107, 108, and 109 are simply provided instead of the belt or the like. Thereby, the structure of the sheet manufacturing apparatus 1 can be simplified. Moreover, the sheet manufacturing apparatus 1 can be reduced in size.

  Then, as shown in FIG. 2, among the three fixing units, the conveyance formed by the surface 107a of the guide 107 corresponding to the first heating unit 120a disposed on the most upstream side with respect to the conveyance direction of the web W and the horizontal plane. The angle θ1 is larger than the conveyance angle θ2 formed by the surface 108a of the guide 108 corresponding to the second heating unit 120b disposed on the downstream side of the first heating unit 120a with respect to the conveyance direction of the web W and the horizontal plane. Yes. Further, the conveyance angle θ2 is larger than the conveyance angle θ3 formed by the surface 109a of the guide 109 corresponding to the cooling unit 150 disposed on the downstream side of the second heating unit 120b with respect to the conveyance direction of the web W and the horizontal plane. That is, the conveyance angle formed between the conveyance surface and the horizontal plane in the fixing unit arranged on the upstream side with respect to the conveyance direction of the web W is the conveyance angle formed between the conveyance surface and the horizontal plane in the fixing unit arranged on the downstream side. Is bigger than. In other words, the conveyance angle formed between the conveyance surface and the horizontal surface in the fixing unit is larger toward the upstream side. Accordingly, the web W is loaded (conveyed) with a large angle with respect to the horizontal plane with respect to the first heating unit 120a disposed on the upstream side. Since the strength of the web W is lower toward the upstream side in the conveyance direction of the web W, the first heating unit 120a is thrown in while having a large angle with respect to the horizontal plane so that the self-weight action of the web W is exerted greatly. It becomes possible. Thereby, even the web W in a state of low strength can be easily conveyed without buckling. In other words, the strength of the web W increases as it is conveyed downstream, in other words, through the fixing unit. Therefore, the web W can be conveyed without buckling even if the angle between the conveyance surface and the horizontal surface is reduced. Note that there are two angles of θ1 and (180−θ1) in θ1 of FIG. 2 between the conveyance surface and the horizontal plane, but in this application, the angle indicated by 0 to 90 degrees is the conveyance angle. Let θ1. The same applies to θ2 and θ3.

  A second cutting unit 130 that cuts the web W along the conveyance direction of the web W is disposed downstream of the fixing unit in the conveyance direction of the web W. In the present embodiment, the second cutting unit 130 is disposed downstream of the cooling unit 150 in the web W conveyance direction. The second 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. Therefore, in the present embodiment, the conveyed web W is first cut into a sheet shape by the first cutting unit 110, and the web W in a state where the skew is reduced is cut by the second cutting unit 130 along the conveyance direction. For this reason, the web W can be accurately cut into a desired dimension.

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

  On the upstream side in the conveyance direction of the web W, the strength of the web W is low, and there is a possibility that the web W may be cut off. Therefore, the web W is cut into sheets before fixing, and the cut web W is put into a first heating unit 120a as a fixing unit. Here, since the conveyance angle θ1 formed by the surface 107a of the guide 107 serving as a conveyance surface corresponding to the first heating unit 120a and the horizontal plane is relatively large, the web W is efficiently conveyed by its own weight. Thereby, even the web W having a relatively low strength can be reliably conveyed without buckling. On the other hand, since the fixing of the web W proceeds on the downstream side of the fixing unit in the conveyance direction of the web W, the strength of the web W is increased. Therefore, the surfaces 108a and 109a of the guides 108 and 109 serving as conveyance surfaces and the horizontal plane Even if the transport angles θ2 and θ3 are small, the web W can be transported without buckling. Further, by reducing the conveying angle between the conveying surface and the horizontal surface on the upstream side and decreasing on the downstream side, the length of the conveying path with respect to the horizontal direction is shortened, and the length with respect to the vertical direction is shortened. The structure of 1 can be reduced in size.

  In addition, the sheet | seat concerning this embodiment mainly says what used the fiber as the 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 mode in which pure pulp or waste 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, 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.

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

  (Modification 1) In the said embodiment, although the web W conveyed by the conveyance part 100 was cut | disconnected by the 1st cutting part 110, it is not limited to this structure. For example, a preheating unit that preliminarily heats the web W at a lower temperature or lower load than the first and second heating units 120a and 120b is disposed upstream of the first cutting unit 110 in the conveyance direction of the web W. May be. In this case, the preheating unit can be configured to include a pair of heating and pressing rollers. A heating member such as a heater is provided at the center of the rotating shaft of the heating and pressing roller, and the web W being conveyed can be heated and pressurized by passing the web W between the pair of heating and pressing rollers. This increases the strength of the web W. Then, the web W that has passed through the preheating unit is cut by the first cutting unit 110. That is, since it is possible to cut the web W in a strength state, it is possible to suppress the collapse of the web W during cutting, and to cut the web W accurately. Further, in this configuration, the transport angle formed by the transport surface and the horizontal plane when transporting the web W to the preheating unit corresponds to the fixing unit (first heating unit 120a, second heating unit 120b, cooling unit 150). It may be larger than the transport angles θ1, θ2, and θ3 formed by the transport surface and the horizontal plane. In this way, even the web W having a relatively low strength can be reliably heated and pressed, and the web W having an increased strength can be conveyed to the fixing unit side.

  (Modification 2) In the above embodiment, the first heating unit 120a, the second heating unit 120b, and the cooling unit 150 are provided as the three fixing units. However, the present invention is not limited to this configuration. For example, there may be two fixing units. For example, you may comprise with the 1st heating part 120a and the 2nd heating part 120b, and you may comprise with the 1st heating part 120a or the 2nd heating part 120b, and the cooling part 150. The configuration of such a fixing unit may be appropriately set according to, for example, the thickness and material of the web W (sheet Pr) to be manufactured. In this way, the sheet Pr (web W) can be manufactured (molded) efficiently.

  (Modification 3) In the above embodiment, the fixing unit performs at least one of heating and cooling. Here, when the fixing unit is a heating and pressing roller, the heating and pressing roller also has a function of transporting the web as long as the fixing unit is connected to a driving unit that rotates the heating and pressing roller. Further, when the fixing unit is a plate-like press, it does not have a function of conveying the web. In this case, a conveying roller may be provided on the upstream side or the downstream side of the plate-like press. Therefore, a conveyance roller may be included as the fixing unit.

  DESCRIPTION OF SYMBOLS 1 ... Sheet manufacturing apparatus, 10 ... Supply part, 20 ... Crushing part, 30 ... Defibration part, 40 ... Classification part, 50 ... Receiving part, 60 ... Additive input part, 70 ... Web molding part, 73 ... Mesh belt 75 ... Suction device, 100 ... Conveying unit, 101 ... Conveying belt, 107, 108, 109 ... Guide, 107a, 108a, 109a ... Guide surface, 110 ... First cutting unit, 120a ... First heating unit, 120b ... Second heating unit, 121 ... heating roller, 130 ... second cutting unit, 150 ... cooling unit, 151 ... cooling roller, 160 ... stacker, Pu ... used paper, W ... web, Pr ... sheet, [theta] 1, [theta] 2, [theta] 3 ... transport angle.

Claims (5)

A sheet manufacturing apparatus comprising: a web forming unit that forms a web including fibers and a resin; and a plurality of fixing units that perform at least one of heating and cooling the web,
Of the angles formed between the conveyance surface and the horizontal plane when conveying the web from each fixing unit, the conveyance angle indicated by 0 degrees or more and 90 degrees or less is the upstream side disposed with respect to the conveyance direction of the web. The sheet manufacturing apparatus according to claim 1, wherein the conveyance angle in the fixing unit is larger than the conveyance angle in the fixing unit arranged on the downstream side. In the sheet manufacturing apparatus according to claim 1,
The plurality of fixing units are three or more, and the conveyance angle formed by the conveyance surface and the horizontal surface when conveying the web from each of the fixing units is arranged on the upstream side with respect to the conveyance direction of the web. The sheet manufacturing apparatus, wherein the fixing unit is larger. In the sheet manufacturing apparatus according to claim 1 or 2,
The sheet manufacturing apparatus, wherein the conveyance surface is a surface of a conveyance guide. In the sheet manufacturing apparatus according to any one of claims 1 to 3,
An apparatus for manufacturing a sheet, comprising: a cutting unit that cuts the web upstream of the plurality of fixing units with respect to a conveyance direction of the web. In the sheet manufacturing apparatus according to claim 4,
A sheet manufacturing apparatus characterized in that the sheet is always conveyed vertically downward from the cutting unit to the plurality of fixing units.

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