EP2287397B1 - Regenerated paper smoothing device of used paper recycling apparatus, paper making device, and used paper recycling apparatus - Google Patents
Regenerated paper smoothing device of used paper recycling apparatus, paper making device, and used paper recycling apparatus Download PDFInfo
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- EP2287397B1 EP2287397B1 EP10250985A EP10250985A EP2287397B1 EP 2287397 B1 EP2287397 B1 EP 2287397B1 EP 10250985 A EP10250985 A EP 10250985A EP 10250985 A EP10250985 A EP 10250985A EP 2287397 B1 EP2287397 B1 EP 2287397B1
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- European Patent Office
- Prior art keywords
- paper
- belt
- unit
- pulp
- making device
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F9/00—Complete machines for making continuous webs of paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
Definitions
- the present invention relates to a paper making device for a furniture-sized used paper recycling apparatus according to the preamble portion of claim 1.
- Used paper of various types such as used and unnecessary documents occurs not only in government offices or private companies, but also in daily life or general household. Used paper is usually discarded, incinerated, or disposed as refuse.
- This used paper recycling apparatus is a realization of used paper recycling technology of large scale such as used paper recycling plant in a small size that can be installed in a small shop or a room in general household, and includes, in an apparatus case of furniture size, a pulp making unit for macerating and beating used paper to manufacture used paper pulp, a paper making unit for making recycled paper from the used paper pulp manufactured in this pulp making unit, and a control unit for driving and controlling the pulp making unit and the paper making unit in cooperation, in which the paper making unit includes a paper making process unit for manufacturing wet paper from the used paper pulp sent from the pulp making unit, and a drying process unit for manufacturing recycled paper by drying the wet paper manufactured in this paper making process unit, and these two process units are composed in a form of belt conveyor having a running belt for processing and conveying the used paper pulp.
- the used paper is macerated and beaten in the pulp making unit to become used paper pulp, and then this used paper pulp is conveyed on the running belt of the belt conveyor in the paper making unit, and is filtered and dewatered, squeeze and dewatered, and heated and dried, and is formed into recycled paper.
- the used paper in the stage of pulp, the used paper is decomposed to fiber level, and the printed characters and diagrams are completely decomposed and lost, and cannot be restored, so that leak or disclosure of confidential information or personal information composed in printed characters and diagrams can be securely prevented.
- EP 2014862 A2 discloses a used paper recycling device having the features of the preamble of Claim 1.
- a paper making device comprises the features of the characterizing portion of Claim 1.
- a second aspect of the invention provides a used paper recycling apparatus.
- the used paper recycling apparatus of the present invention is shown in Fig. 1 to Fig. 6 , and this used paper recycling apparatus 1 is specifically installed at the site of origin of used paper, and it is an apparatus for recycling into a re-usable paper at the site without discarding the generated used paper UP, and the used paper UP includes confidential documents of government offices or private companies, personal letters and others in the general household, and other used and unnecessary documents.
- the used paper recycling apparatus 1 is a furniture size as shown in Fig. 6 , that is, small in size and shape similar to furniture, such as document rack, locker, office desk, copier or personal computer used in an office, and mainly includes, as shown in Fig. 1 , a pulp making unit 2, a pulp concentration adjustment unit 3, a paper making unit (paper making device) 4, and an apparatus control unit (control unit) 5, and the paper making unit 4 includes a recycled paper smoothing processing unit (recycled paper smoothing device, recycled paper smoothing processing means) 10 as a characteristic component of the present invention.
- a pulp making unit 2 a pulp concentration adjustment unit 3
- paper making unit (paper making device) 4 and an apparatus control unit (control unit) 5
- the paper making unit 4 includes a recycled paper smoothing processing unit (recycled paper smoothing device, recycled paper smoothing processing means) 10 as a characteristic component of the present invention.
- the apparatus case 6 is a furniture size as mentioned above, and may be designed in specific dimensions and shapes appropriately depending on the purpose or application.
- the apparatus case 6 in the illustrated preferred embodiment is a rectangular box having dimensions and shapes similar to a copier installed and used in a general office, and the top plate of the apparatus case 6 has an inlet 7 which is opened and closed for supplying used paper UP, and an discharge port 8 is provided at the side for discharging recycled paper RP, RP, ....
- a recycled paper receiving tray 9 is detachably provided for receiving recycled paper RP, RP, ... discharged from the discharge port 8.
- the pulp making unit 2 is a process location for manufacturing used paper pulp by macerating and beating the used paper UP, and is composed of a macerating unit 20 for agitating, crushing and macerating the used paper UP, and a beating unit 21 for beating the used paper UP macerated in the macerating unit 20.
- the macerating tank 25 has the inlet 7 formed in its ceiling wall as shown in Fig. 2 for charging and supplying the used paper UP, and a discharge port 28 is provided in its bottom wall for discharging the macerated used paper pulp UPP to the downstream side.
- the inner volume of the macerating tank 25 is determined depending on the number of sheets of used paper UP to be processed in batch.
- the macerating tank 25 has a capacity of agitating and treating (in batch) a total of about 500 sheets (about 2000 g) of used paper UP of A4 format PPC (plain paper copier) by adding about 98 liters of water.
- the concentration of the used paper pulp UPP to be macerated is about 2%. The concentration is adjusted by supplying water from the water feed device 27, and this water feed device 27 is a part of the pulp concentration adjustment unit 3 described below.
- the inlet 7 has a structure to be opened and closed to the outside of a case cover 6a of the apparatus case 6.
- the discharge port 28 is opened and closed by an opening and closing valve 29, and communicates with a used paper pulp circulation route 49 described below.
- a debris filter 30 is provided for removing obstacles for the next beating process, such as clips, staples, pins and others used for binding the used paper UP, UP, ....
- the opening and closing valve 29 opens and closes specifically by the crank motion of a crank mechanism 36 driven by a drive motor 35.
- the drive motor 35 is specifically an electric motor, and this drive motor 35 is electrically connected to the apparatus control unit 5.
- the agitating device 26 is provided inside of the macerating tank 25, and includes an agitation impeller 40 and a drive motor 41.
- the agitation impeller 40 has its rotation shaft 40a supported rotatably in an upright position in the central position of the bottom of the maceration tank 25, and is rotatable in the horizontal direction, and the lower end of the rotation shaft 40a is driven and coupled to a rotation shaft 41a of the drive motor 41 by way of transmission means 4 2 composed of a transmission pulley 42a, a transmission belt 42b, and a transmission pulley 42c.
- the water feed device 27 is to supply water W into the macerating tank 25, and forms a beating concentration adjustment unit 3A of the pulp concentration adjustment unit 3 as described below.
- the water feed device 27 in the illustrated preferred embodiment includes, as shown in Fig. 1 , a white water collection tank 45, a water feed pump 46 for beating concentration adjustment, and a water feed tank 47 for paper making concentration adjustment.
- the white water collection tank 45 is, as described below, designed to collect white water W (pulp water of very low concentration filtered through a paper making mesh in the paper making process) filtered and dewatered in the paper making unit 4, and the white water W collected in the white water collection tank 45 is first supplied into the macerating tank 25 from the water feed pump 46, and then into a concentration adjustment tank 85 described below from the water feed pump 47.
- a weight sensor 48 is provided in the bottom of the macerating tank 25, and the used paper UP, UP, ... and the water to be processed in batch in the macerating tank 25 are weighed and controlled, and the weight sensor 48 is electrically connected to the apparatus control unit 5.
- the weight sensor 48 of the illustrated preferred embodiment is a load cell, and is designed to sense and measure the total weight of weight of macerating tank 25, and weight of used paper UP, UP, ... and water charged and supplied in the macerating tank 25.
- the used paper UP, UP, ... charged into the macerating tank 25 from the charging opening of the apparatus case 6, that is, the inlet 7 are agitated and mixed for a specified time (10 to 20 minutes in the illustrated preferred embodiment) in the water supplied from the water feed device 27 by normal and reverse rotation of the agitation impeller 40 by the drive motor 41, and thereby the used paper UP, UP, ... are macerated and beaten into used paper pulp UPP.
- the discharge port 28 of the macerating tank 25 is closed by the opening and closing valve 29 during operation of the macerating unit 20, and flow of used paper UP or used paper pulp UPP from the macerating tank 25 into the used paper pulp circulation route 49 is blocked, while the discharge port 28 is opened by the opening and closing valve 29 during operation of the beating unit 21 described later, and the flowing and circulating loop of the used paper pulp UPP from the macerating tank 25 into the used paper pulp circulation route 49 is allowed.
- the beating unit 21 is a process location for beating the used paper UP macerated in the macerating unit 20, and is specifically designed to pressurize and beat the used paper UP macerated in the macerating unit 20, and to grind and pulverize (into micro-fibers) the inks forming characters and patterns on the used paper UP (printing inks forming characters and patterns on the used paper UP by various printing technologies, or inks forming characters and patterns on the used paper UP by pencil, ball-point pen, fountain pen, and other writing tools).
- This beating unit 21 includes a grinder 50 as a principal component.
- This grinder 50 includes, as shown in Fig. 3 , a pair of beating disks 51, 52 rotated and driven relatively, and the pair of beating disks 51, 52 have beating action surfaces 51a, 52a disposed oppositely and concentrically across a tiny beating gap G.
- the beating gap G of the beating action surfaces 51a, 52a of the grinder 50 is determined so as to be narrowed gradually, as described below, from the grinder 50 in an initial period of beating process to the grinder 50 in a later period.
- the used paper pulp circulation route 49 having one grinder 50 is formed, and the used paper pulp UPP is circulated and beaten for a specified time by way of the grinder 50 in a circulation system.
- one grinder 50 carries out the whole beating process throughout the entire process of the beating process, and this one grinder 50 has the functions of a plurality of grinders from the grinder in an initial period of beating process to the grinder in a later period. More specifically, the beating gap G of the beating action surfaces 51a, 52a of the grinder 50 is controlled and adjusted so as to be narrower gradually from the initial period to the final period of the beating process.
- the grinder 50 of the illustrated preferred embodiment is disposed, as shown in Fig. 2 , adjacently to the macerating tank 25 of the macerating unit 20, on an apparatus machine body 54 composing the apparatus case 6, and as shown in Fig. 3 , it further includes a beating tank 55 communicating with the macerating tank 25 of the macerating unit 20, the pair of beating disks 51, 52 provided relatively and rotatably in this beating tank 55, a rotation drive source 56 for relatively rotating the pair of beating disks 51, 52, and gap adjusting means 57 for adjusting the beating gap G of the pair of beating disks 51, 52.
- the beating tank 55 is formed in a closed cylindrical shape for accommodating the pair of beating disks 51, 52, and has a supply port 55a for supplying the used paper pulp UPP from the upstream side, and a discharge port 55b for discharging the beaten used paper pulp UPP to the downstream side.
- the supply port 55a is opened in the center of the bottom of the beating tank 55 toward the vertical direction, and the discharge port 55b is opened at the cylindrical side of the beating tank 55 toward the horizontal direction.
- the supply port 55a and the discharge port 55b are connected to communicate with the macerating tank 25 of the macerating unit 20, respectively by way of circulation pipings 49a, 49b as shown in Fig. 3 , and the discharge port 55b is further connected to communicate with a used paper pulp collection tank 60 by way of a discharge piping 59.
- Reference numeral 61 shows a direction changeover valve, by the changeover operation of this direction changeover valve 61, the used paper pulp UPP discharged from the discharge port 55b is selectively returned to the macerating tank 25, or collected in the used paper pulp collection tank 60.
- the direction changeover valve 61 is specifically an electromagnetic valve, and is electrically connected to the apparatus control unit 5.
- the pair of beating disks 51, 52 one is a fixed side beating disk fixed in the rotating direction, and other is a rotating side beating disk which is rotatable.
- the upper side beating disk 51 is the rotating side
- the lower side beating disk 52 is the fixed side
- the rotating side beating disk 51 of the upper side is disposed oppositely to the fixed side beating disk 52 of the lower side, concentrically and rotatably across a tiny beating gap G.
- the rotating side beating disk 51 is driven and coupled to a drive motor 56 by way of a rotation main shaft 64 pivoted rotatably to the fixed side of the apparatus machine body 54 and movably in the axial direction.
- the rotation main shaft 64 is rotatably pivoted on an elevating member of the gap adjusting means 57, and the rotating side beating disk 51 is concentrically and integrally attached at its leading end, and its base end part is driven and coupled integrally in the rotating direction and relatively movably in the axial direction on the rotation shaft of the drive motor 56.
- the drive motor 56 is a rotation drive source, and relatively rotates the pair of beating disks 51, 52, and specifically an electric motor is used, and the drive motor 56 as its drive source is electrically connected to the apparatus control unit 5.
- the opposite sides 51a, 52a of the both beating disks 51, 52 forming the tiny beating gap G mutually collaborate to form beating action surfaces.
- These opposite beating action surfaces 51a, 52a are formed as wheel sides having a multiplicity of abrasive grains bonded by a bonding agent.
- the both beating action surfaces 51a, 52a are, as shown in Fig. 3 , formed in a taper shape continuously increased in the diameter size in the mutually opposite directions, and are formed as annular flat surfaces parallel to each other at the outermost peripheral edges, and these annular flat surfaces form the beating gap G.
- an inlet 70 is formed to communicate coaxially with the supply port 55a of the beating tank, and the two annular flat surfaces formed on the outer peripheral edges of the beating action surfaces 51a, 52a of the pair of beating disks 51, 52 form an outlet 71 communicating with the discharge port 55b of the beating tank 55 and having the beating gap G.
- a plurality of blades 72, 72, ... are formed at specified intervals in the circumferential direction, and these blades 72, 72, ... push out the used paper pulp UPP discharged from the outlet 71 in pumping action toward the discharge port 55b of the beating tank 55b by centrifugal force by rotation of the rotating side beating disk 51.
- the drive motor 56 as the drive source, when the rotating side beating disk 51 is rotated and driven to the fixed side beating disk 52, the used paper pulp UPP supplied into a beating space B by way of the supply port 55a of the beating tank 55 and the inlet 70 from the macerating tank 25 of the macerating unit 20 flows into the beating space B from the inlet 70, and passes through this beating space B, and is pressurized and beaten by the relatively rotating beating action surfaces 51a, 52a, and the inks forming the characters and patterns on the used paper UP are ground and pulverized, and then it is discharged by way of the discharge port 55b of the beating tank 55 from the outlet 71.
- the used paper pulp UPP is further pressurized and beaten at the location of the outlet 71 having the beating gap G, and is pulverized to a specified micron size (to become micro-fiber) defined by this beating gap G.
- this one grinder 50 has the functions of a plurality of grinders from the grinder in an initial period of beating process to the grinder in a terminal period, and more specifically, the beating gap G of the grinder 50 is controlled and adjusted by the gap adjusting means 57 so as to be narrower gradually from the initial period to the final period of the beating process.
- the gap adjusting means 57 is not particularly illustrated, but is designed to move the pair of beating disks 51, 52 relatively in the rotation axial direction, to control and adjust the beating gap G of these beating disks 51, 52, and is mainly composed of moving means (not shown) for moving the rotating side beating disk 51 in the rotation axial direction, that is, in the axial direction of a rotation main shaft 64, and a drive source 66 for driving this moving means.
- the drive source is specifically an electric motor, and this drive motor 66 is electrically connected to the apparatus control unit 5.
- this electric motor 66 By the rotation of this electric motor 66, the rotating main shaft 64 is moved up and down by way of the moving means, and therefore the rotating side beating disk 51 formed integrally with the rotation main shaft 64 is moved in the vertical direction to the fixed side beating disk 52, that is, in the rotation axial direction, and the beating gap G between the two beating disks 51, 52 is controlled and adjusted.
- a position detection sensor (not shown) is provided for detecting the ascending and descending position of the rotating side beating disk 51, and depending on the result of detection by this position detection sensor, the drive motor 66 is driven and controlled.
- the position detection sensor is electrically connected to the apparatus control unit 5.
- the beating gap G of the beating disks 51, 52 is controlled and adjusted by the gap adjusting means 57 in the circulation system beating process by the used paper pulp circulation route 49 shown in Fig. 3 , in mutual interaction with a circulation pump 69 which is circulating means.
- the used paper pulp UPP macerated by the macerating unit 20 is circulated through the used paper pulp circulation route 49 by the circulation pump 69, and is beaten by the grinder 50, and at this time the beating gap G of the beating action surfaces 51a, 52a of the grinder 50 is controlled by the gap adjusting means 57 so as to be narrower gradually from the initial period to the terminal period of the beating process.
- the macerating tank 25 of the macerating unit 20 is included, and in this beating process, the agitating device 26 of the macerating unit 20 is driven and controlled, and the macerating unit 20 is driven simultaneously with the beating unit 21. That is, in the circulation system beating process, the used paper pulp UPP flows out into the used paper pulp circulation route 49 from the macerating tank 25, while the used paper pulp UPP beaten by the grinder 50 flows into the macerating tank 25, and therefore in the macerating tank 25, the used paper pulp UPP of different degrees of beating is mixed, and by the agitating action by the agitating device 26, the degree of beating of the used paper pulp UPP in the macerating tank 25 is made uniform, and the beating process is promoted.
- the used paper pulp collection tank 60 is a location for collecting the used paper pulp UPP beaten and pulverized to a desired size by the beating unit 21, and the used paper pulp UPP collected herein is mixed and adjusted to a paper making concentration corresponding to the finished paper quality of the recycled paper RP to be regenerated as a pulp suspension PS by the pulp concentration adjustment unit 3, and is sent to the paper making unit 4 in a next paper making process.
- the pulp concentration adjusting unit 3 is a weight type device for adjusting the concentration of the used paper pulp UPP supplied in the paper making unit 4, by measuring the weight and adjusting the mixing rate of used paper UP and water W supplied into the apparatus, and more specifically as shown in Fig. 4 , it includes a beating concentration adjusting unit 3A, a paper making concentration adjusting unit 3B, and a pulp concentration adjusting unit 3C.
- the beating concentration adjusting unit 3A is to adjust the beating concentration of the used paper pulp UPP in the pulp making unit 2, corresponding to the beating efficiency by the beating unit 21, and as mentioned above, it is mainly composed of the water feed pump 46 and the beating concentration control unit 75 for adjusting the beating concentration of the water feed device 27.
- the supply amount of white water W by the water feed pump 46 of the beating concentration adjusting unit 3A is preferred to be set so that the beating concentration of the used paper pulp UPP macerated and beaten by the agitating device 26 may be, for example, the maximum concentration allowable for the beating capacity of the grinder 50 of the beating unit 21 for executing the next step of the beating process, and in the illustrated preferred embodiment, it is set to be a beating concentration of about 2% as mentioned above.
- the beating concentration control unit 75 drives and controls the water feed pump 46 so as to supply a necessary amount of water W into the macerating tank 25, as mentioned above, depending on the result of measurement from the weight sensor 48.
- This beating concentration control unit 75 composes a part of the apparatus control unit 5 as described below.
- the paper making concentration adjusting unit 3B is to adjust the paper making concentration of the used paper pulp UPP in the paper making unit 4, to an appropriate concentration corresponding to the finished paper quality of the recycled paper RP to be regenerated, and is more specifically designed to adjust the concentration of the used paper pulp UPP manufactured in the pulp making unit 2 by a division system, and it mainly includes a division extraction unit 80, a suspension preparing unit 81, and a paper making concentration control unit 82.
- the division extraction unit 80 is to divide and extract by a specified small portion from the total volume of the used paper pulp UPP manufactured in the pulp making unit 2 in the preceding process, and includes a used paper pulp supply pump 86 for division and extraction for extracting the used paper pulp UPP of the used paper pulp collection tank 60 and sending to a concentration adjusting tank 85.
- the suspension preparing unit 81 is to prepare a pulp suspension PS of a specified concentration by adding a prescribed amount of water W for concentration adjustment to the specified small portion of the used paper pulp UPP divided and extracted by the division extraction unit 80, and mainly includes a water feed pump 47 of the water feed device 27.
- a weight sensor 87 composed of a load cell is provided, and is designed to measure and control the amount of the used paper pulp UPP and water W for concentration adjustment supplied into the concentration adjusting tank 85, and the weight sensor 87 is electrically connected to the apparatus control unit 5.
- the paper making concentration control unit 82 controls by interacting the division extraction unit 80 and the suspension preparing unit 81, and forms a part of the apparatus control unit 5, and controls the pumps 86, 47 of the division extraction unit 80 and the suspension preparing unit 81 by interaction so as to execute the following step of the paper making concentration adjusting process.
- the used paper pulp UPP of a specified portion (1 L in the illustrated preferred embodiment) is divided by the used paper pulp supply pump 86, and is transferred and contained in the concentration adjusting tank 85. As a result, its weight is sensed and measured by the weight sensor 87, and the result is sent to the apparatus control unit 5.
- diluting water W is supplied by the water feed pump 47 into the concentration adjusting tank 85 from the white water collection tank 45 by a specified volume (9 L in the illustrated preferred embodiment, actually as weighed and measured by the weight sensor 87).
- the concentration adjusting tank 85 the used paper pulp UPP of beating concentration (2% in the illustrated preferred embodiment) and the water W are mixed and diluted, and a pulp suspension PS of a specified concentration (about 0.2% concentration or target concentration in the illustrated preferred embodiment) is mixed and prepared.
- the target concentration of the pulp suspension PS to be prepared is determined in consideration of the paper making capacity in the paper making unit 4 described below on the basis of the results of the preliminary experiment, and it is set to about 0.2% in the illustrated preferred embodiment as mentioned above.
- the pulp suspension PS prepared to the paper making concentration (0.2%) of the target concentration in the concentration adjusting tank 85 is transferred and supplied into a pulp supply tank 89 from the concentration adjusting tank 85 by a first suspension supply pump 88, and is stored in preparation for the next process of paper making unit 4. Thereafter, this paper making concentration adjustment process is repeated similarly for the entire volume of the used paper pulp UPP in the used paper pulp collection tank 60.
- the pulp supply tank 89 is provided with a second suspension supply pump 90 for sending the pulp suspension PS into a paper making belt conveyor 95 of the paper making unit 4.
- An agitating device 91 is provided in the pulp supply tank 89, and by the agitating action of this agitating device 91, the paper making concentration of the entire stored and held pulp suspension PS is uniformly kept at a specific value.
- the concentration adjustment by the paper making concentration adjusting unit 3 is not done in batch of whole volume, but is done in divided portions, that is, in small portions, and the water consumption is saved substantially, and the concentration adjusting tank 85 can be reduced in size and shape substantially, and hence the used paper recycling apparatus 1 is entirely built in a compact design.
- the pulp concentration control unit 3C is to drive and control the beating concentration adjusting unit 3A and the paper making concentration adjusting unit 3B in interlock, and specifically by receiving the pulp concentration control information (the charging amount of the used paper UP, the water supply amount into the macerating tank 25, the beating concentration of the used paper pulp UPP, etc.) from the beating concentration control unit 75 of the beating concentration adjusting unit 3A, the paper making concentration information (the target paper making concentration of the used paper pulp UPP, the division extraction amount of the used paper pulp UPP from the used paper pulp collection tank 60, the water supply amount into the concentration adjusting tank 85, etc.) for adjusting the concentration of the used paper pulp UPP manufactured in the pulp making unit 2 to the target concentration (the paper making concentration) depending on this control information sent to the paper making concentration control unit 82 of the paper making concentration adjusting unit 3B, and thereby the paper making concentration adjusting process is executed.
- the pulp concentration control information the charging amount of the used paper UP, the water supply amount into the macerating tank 25, the beating concentration of the used paper pulp
- the paper making unit 4 is a process location for manufacturing recycled paper RP from the used paper pulp UPP manufactured in the pulp making unit 2, and is mainly composed of, as shown in Fig. 1 and Fig. 5 , a paper making belt conveyor unit 95, a dewatering roll unit 96, and a drying belt conveyor unit 97, and the drying belt conveyor unit 97 is provided with a recycled paper smoothing processing unit (recycled paper smoothing device, recycled paper smoothing processing means) 10 which is the characteristic component of the present invention as described above.
- a recycled paper smoothing processing unit recycled paper smoothing device, recycled paper smoothing processing means
- the paper making belt conveyor unit 95 is a location for manufacturing wet paper by making from slurry-like pulp suspension PS composed of the water W and the used paper pulp UPP sent from the pulp supply tank 89 of the pulp making unit 2, and mainly includes a paper making net conveyor 100 and a pulp supply unit 101.
- the paper making net onveyor 100 is for conveying the pulp suspension while making paper therefrom, and a mesh belt 105 of paper making mesh structure composed of numerous mesh cells is disposed for filtering and dewatering the pulp suspension PS while running straightly in its running direction.
- the paper making net onveyor 100 includes the mesh belt 105 of an endless belt form for conveying the pulp suspension while making paper from pulp suspension PS, and a drive motor 106 for driving and moving this mesh belt 105.
- the plate member of the paper making mesh structure for composing the mesh belt 105 is a material capable of filtering and dewatering the pulp suspension PS appropriately by way of the numerous mesh cells of the paper making mesh structure, and preferred materials include polypropylene (PP), polyethylene terephthalate (PET), polyamide (PA) (generally known as Nylon, a registered trademark), stainless steel (SUS), and other corrosion resistant materials, and in the illustrated preferred embodiment, a PET-made mesh belt 105 excellent in heat resistance is used.
- PP polypropylene
- PET polyethylene terephthalate
- PA polyamide
- SUS stainless steel
- the paper making mesh structure of the mesh belt 105 is preferably a material of fine mesh cells and fine weaving cells, and specifically, depending on the desired characteristics of the obtained paper, the following points are taken into consideration.
- the mesh size of the mesh belt 105 is preferably 25 mesh cells to 80 mesh cells, and in the illustrated preferred embodiment, the mesh belt 105 of 50 mesh cells is used.
- the mesh structure of the mesh belt 105 is determined not only by the mesh size (mesh cells) but also by the mesh fiber diameter. At the same number of mesh cells, when the fiber diameter is larger, the mesh size is smaller, and when the diameter is smaller, the mesh size is larger, and this relation is expressed by the mesh voids or air permeability (cm 3 /cm 2 /sec), that is, the rate of permeating air.
- the mesh size is fine and the permeability is poor, the water filtration rate is low, and, as a result, the shape and size of the pulp supply unit 101 described below are extended in the running direction of the mesh belt 105, and the apparatus becomes large in size.
- the mesh size is coarse and the permeability is excellent, the pulp supply unit 101 is short and the apparatus is small in size, but the recycled paper RP is rough in paper quality, and the difference in smoothness of face and back surfaces becomes significant, and the smoothness of the paper is poor.
- the mesh belt 105 is formed in a mesh structure small in mesh fiber diameter, large in the number of mesh cells, and not lowered in the permeability, in order to prevent the used paper pulp UPP from slipping out of the mesh cells of the mesh belt 105 in the paper making process, and in the illustrated preferred embodiment, the mesh belt 105 is a 50-mesh PET-made mesh belt 105 of plain weaving. This mesh belt 105 has been experimentally proved to produce an excellent paper quality without causing any particular problem in writing.
- the width dimension of the mesh belt 105 set at a specified width dimension slightly larger than the width dimension of the recycled paper RP to be manufactured from the pulp suspension PS.
- the mesh belt 105 is, as shown in Fig. 1 and Fig. 5 , suspended and supported rotatably by way of a drive roller 107, a dewatering roll unit 96, a driven roller 108, and a support roller 109, and is driven and coupled to the drive motor 106 by way of the drive roller 107.
- the paper making process length in the mesh belt 105 is determined in a range of upper side running direction length of the mesh belt 105 in the apparatus case 6 of furniture size (in the illustrated preferred embodiment, the lateral direction length from the pulp supply unit 101 to the dewatering roll unit 96 in Fig. 1 ).
- the running speed of the mesh belt 105 is set in consideration of various conditions in the paper making process, and preferably set at 0.1 m/min to 1 m/min, and set at 0.2 m/min in the illustrated preferred embodiment.
- the running speed of the mesh belt of this type is set at least at 100 m/min or more, or even more than 1000 m/min in a faster version.
- the mesh belt 105 is disposed so as to run obliquely upward and straightly toward its running direction, and in the limited space of installation, the paper making process length can be extended considerably, and the filtering and dewatering rate is enhanced in the relation with the paper making mesh structure of the mesh belt 105.
- the drive motor 106 for moving and driving the mesh belt 105 is specifically an electric motor, and is connected electrically to the apparatus control unit 5. This drive motor 106 is also used as the running and driving source of the dewatering roll unit 96 and the drying belt conveyor unit 97 described below.
- the pulp supply unit 101 is a location for supplying a pulp suspension PS onto the mesh belt 105 from the pulp making unit 2, and although not specifically shown, by this pulp supply unit 101, the pulp suspension PS is spread uniformly on the top surface of the mesh belt 105.
- the pulp supply unit 101 is provided at the start end position of the paper making process of the paper making net conveyor 100.
- the pulp suspension PS supplied into the pulp supply unit 101 from the pulp supply tank 89 is stored and reserved by a specified amount in this pulp supply unit 101, and by this reserving action, it is diffused uniformly on the top surface of the mesh belt 105.
- the pulp suspension PS diffused uniformly on the top surface of the mesh belt 105 is conveyed together with the mesh belt 105 by the driving action of the mesh belt 105 in the arrow direction, and is filtered by weight by the mesh cells of the mesh belt 105, and is dewatered, and wet paper RP 0 (water content 90 to 85% in the illustrated preferred embodiment) is obtained.
- the white water W filtered and dewatered by this mesh belt 105 (pulp water of ultra-low concentration filtered by the paper making mesh in the paper making process) is collected in the white water collection tank 45 of the water feed device 27 as mentioned above.
- the dewatering roll unit 96 forms a location for squeezing and dewatering the wet paper RP 0 on the mesh belt 105 at the linkage position of the paper making belt conveyor unit 95 and the drying belt conveyor unit 97 described below.
- a smooth surface belt 145 mentioned below of the drying belt conveyor unit 97 at the downstream side, and the mesh belt 105 of the paper making belt conveyor unit 95 at the upstream side are disposed in upper and lower layers as shown in Fig. 1 and Fig. 5 , and the upper and lower adjacent portions of the smooth surface belt 145 and the mesh belt 105 are formed at the linkage portion, and at this linkage portion, the dewatering roll unit 96 rolls and compresses the mesh belt 105 and the smooth surface belt 145 from upper and lower sides, thereby dewatering the wet paper in compressed state.
- the dewatering roll unit 96 includes at least a preliminary dewatering roll unit 96A, and a final dewatering roll unit 96B as principal components.
- the dewatering roll unit 96 in the illustrated preferred embodiment includes, as shown in Fig. 1 , the preliminary dewatering roll unit 96A, the final dewatering roll unit 96B, and an angle defining roll unit 96C as assisting means, as principal components.
- the preliminary dewatering roll unit 96A is for squeezing and dewatering preliminarily the wet paper RP 0 on the mesh belt 105, and specifically includes a preliminary squeezing roll pair 122 consisting of a preliminary dewatering roll 120 rolling on the mesh belt 105 from the lower side, and a preliminary press roll 121 rolling and pressing on the smooth surface belt 145 from the upper side in collaboration with the preliminary dewatering roll 120.
- the preliminary squeezing roll pair 122 consisting of the preliminary dewatering roll 120 and the preliminary press roll 121, the mesh belt 105 and the smooth surface belt 145 are rolled and squeezed from both upper and lower sides at a specified preliminary pressure in a compressed state, and the water content in the wet paper RP 0 on the mesh belt 105 is removed preliminarily.
- the preliminary pressure that is, the preliminary squeezing force of the preliminary dewatering roll unit 96A for preliminarily squeezing and dewatering the wet paper RP 0 on the mesh belt 105 is set at a magnitude so as not to destroy the wet paper RP 0 of high water content, and in the illustrated preferred embodiment, the preliminary squeezing force is determined so that the water content of the wet paper RP 0 on the mesh belt 105 after preliminary dewatering process may be in a range of 80 to 75%.
- the final dewatering roll unit 96B is for obtaining a dry paper specified water content (recycled paper) RP by further squeezing and dewatering the wet paper RP 0 on the mesh belt 105 after preliminary dewatering by the preliminary dewatering roll unit 96A, and specifically includes at least one set of a final squeezing roll pair 127 consisting of a final dewatering roll 125 rolling on the mesh belt 105 from the lower side, and a final press roll 126 rolling and pressing on the smooth surface belt 145 from the upper side in cooperation with the final dewatering roll 125.
- a final squeezing roll pair 127 consisting of a final dewatering roll 125 rolling on the mesh belt 105 from the lower side
- a final press roll 126 rolling and pressing on the smooth surface belt 145 from the upper side in cooperation with the final dewatering roll 125.
- the final squeezing roll pair 127 consisting of the final dewatering roll 125 and the final press roll 126, the mesh belt 105 and the smooth surface belt 145 are rolled and squeezed from both upper and lower sides at a specified final pressure in a compressed state, and the water content in the wet paper RP 0 on the mesh belt 105 is finally removed, and a dry paper of specified water content, that is, recycled paper RP is obtained.
- the final pressure that is, the final squeezing force of the final dewatering roll 96B for finally squeezing and dewatering the wet paper RP 0 on the mesh belt 105 is set to such a magnitude for obtaining a specified dewatering effect securely about the preliminarily dewatered wet paper RP 0 , and in the illustrated preferred embodiment; it is set so that the water content of the dry paper (recycled paper) RP on the mesh belt 105 after the final dewatering process may be in a range of 70 to 65%.
- rolls 120, 121, 125, 126 in the dewatering roll unit 96 are not specifically shown, but as being driven and coupled to the single drive motor 106 by driving and coupling means of gear mechanism, all rolls 120, 121,125,126 are rotated and driven in mutual interaction.
- these rolls 120, 121,125,126 are rotated and controlled so as to roll and contact mutually at a slight rotating speed difference mutually on the outer circumferential surfaces of the upper and lower rolls 120, 125 and the outer circumferential surfaces of 121, 126, on the contact surfaces (the lower side of the mesh belt 105 and the upper side of the smooth surface belt 145) of the mesh belt 105 and the smooth surface belt 145 rolled and squeezed in a compressed state between the outer circumferential surfaces.
- the rotating speed of the upper side preliminary and final press rolls 121, 126 is set slightly larger than the rotating speed of the lower side preliminary and final dewatering rolls 120, 125, and therefore the running speed of the smooth surface belt 145 is set slightly larger than the running speed of the mesh belt 105.
- the running speed of the smooth surface belt 145 is set slightly larger than the running speed of the mesh belt 105.
- the angle defining roll unit (angle defining means) 96C is for assisting the squeezing and dewatering action of the preliminary dewatering roll unit 96A and the final dewatering roll unit 96B to be effective, and it is provided at the upstream side of the preliminary dewatering roll unit 96A, and defines the inclination angle between the mesh belt 105 and the smooth surface belt 145 inserted in the preliminary dewatering roll unit 96A.
- the angle defining roll unit 96C is specifically for defining the inclination angle between the mesh belt 105 and the smooth surface belt 145 inserted in the preliminary dewatering roll unit 96A, and more specifically it includes a mesh belt guide roll 130 rolling on the mesh belt 105 from the lower side, and defining the insertion angle of the mesh belt 105 in the preliminary dewatering roll unit 96A, and a smooth surface belt guide roll 131 rolling on the smooth surface belt 145 from the upper side, and defining the insertion angle of the smooth surface belt 145 in the preliminary dewatering roll unit 96A.
- the insertion angle of the mesh belt 105 in the preliminary dewatering roll unit 96A is defined, and by the smooth surface belt guide roll 131, the insertion angle of the smooth surface belt 145 in the preliminary dewatering roll unit 96A is defined, and therefore the inclination angle between the mesh belt 105 and the smooth surface belt 145 is indirectly determined in a specified range.
- the inclination angle of the mesh belt 105 and the smooth surface belt 145 is determined so as to prevent effectively the wet paper RP 0 from returning to slurry by re-absorption of a large volume of squeezed water into the wet paper RP 0 after the water contained in the wet paper RP 0 is once squeezed substantially to the upstream side of the preliminary dewatering roll unit 96A by the preliminary dewatering action by the preliminary dewatering roll unit 96A.
- the preliminary dewatering roll 120 and the preliminary press roll 121 of the preliminary dewatering roll unit 96A when the mesh belt 105 and the smooth surface belt 145 on which the wet paper RP 0 is mounted at the upper side are squeezed and rolled from the upper and lower sides in a compressed state, the water content in the wet paper RP 0 is squeezed out to the upstream side of the both rolls 120, 121.
- the upper side smooth surface belt 145 is apart from the wet paper RP 0 on the lower side mesh belt 105, and hence a part of the abundant squeezed water contained in the wet paper RP 0 may be absorbed again in the wet paper RP 0 , and the wet paper RP 0 may become slurry again.
- the inclination angle ⁇ between the mesh belt 105 and the smooth surface belt 145 is preferably set in a range of 1 to 20 degrees as a result of various tests, preferably 3 to 7 degrees, and it is set at 5 degrees in the illustrated preferred embodiment.
- the rolls 120, 121, 125, 126 of the preliminary dewatering roll unit 96A and the final dewatering roll unit 96B in the dewatering roll unit 96 are put in rotation, and first by the preliminary squeezing roll pair 122 in the preliminary dewatering roll unit 96A, the mesh belt 105 and the smooth surface belt 145 are rolled and squeezed from both upper and lower sides in a compressed state at a specified preliminary pressure, and the water contained in the wet paper RP 0 on the mesh belt 105 is preliminarily removed (in the illustrated preferred embodiment, the water content in the wet paper RP 0 is reduced from 90 to 85% to 80 to 75%).
- the mesh belt 105 and the smooth surface belt 145 are rolled and squeezed from both upper and lower sides in a compressed state at a specified final pressure, and the water contained in the wet paper RP 0 on the mesh belt 105 is finally removed, and the dry paper of specified water content, that is, the recycled paper RP is obtained (in the illustrated preferred embodiment, the wet paper RP 0 of water content of 80 to 75% is dewatered to the dry paper RP of water content of 70 to 65%).
- the white water W squeezed and dewatered from the wet paper RP 0 is collected in the white water collection tank 45 in the water feed device 27.
- the wet paper RP 0 squeezed and dewatered by the dewatering roll unit 96 is transferred and conveyed to the lower side of the upper side smooth surface belt 145 from the upper side of the lower side mesh belt 105, at a downstream side location of the dewatering roll unit 96, and is conveyed together with the smooth surface belt 145, and is dried by the drying belt conveyor unit 97 in the drying process.
- This transfer action is considered to be caused by a smooth surface structure of the smooth surface belt 145. That is, the surface of the lower side mesh belt 105 is a fine rough surface having multiple fine continuous pores, whereas the surface of the upper side smooth surface belt 145 is a smooth surface without pores, and hence the dry paper RP 0 slightly containing water seems to be adsorbed by the surface tension against the surface of the smooth surface belt 145.
- the drying belt conveyor unit 97 is a location for manufacturing the recycled paper RP by further heating and drying the dry paper RP squeezed and dewatered in the dewatering roll unit 96, and is mainly composed of a drying conveyor 170, a heating and drying unit 171, and the recycled paper smoothing processing unit (recycled paper smoothing device, recycled paper smoothing processing means) 10.
- the drying conveyor 170 is for smoothing and conveying the wet paper RP 0 squeezed and dewatered in the dewatering roll unit 96, and mainly includes the smooth surface belt 145, and the drive moor 106 for driving and moving this smooth surface belt 145.
- the smooth surface belt 145 is to convey the wet paper RP 0 while heating and drying, and is specifically an endless belt connected and formed in an annular shape of a specified length of a plate material of smooth surface structure having a specified width.
- the plate material of smooth surface structure is finished in an appropriate smooth surface at one side of the surface of the wet paper RP 0 , and is made of a material capable of withstanding the heating action of the heating and drying unit 171 described below, and preferably an elastic heat resistant material is used such as fluorine resin or stainless steel, and a fluorine resin belt is used in the illustrated preferred embodiment.
- This smooth surface belt 145 is, as shown in Fig. 1 , rotatably supported and held by way of a drive roller 176, a driven roller 177, the dewatering roll unit 96, and a driven roller 178, and is driven and coupled to the drive motor 106 by way of the drive roller 176.
- the drive motor 106 for driving and moving the smooth surface belt 145 is commonly used as the running and driving source of the paper making net conveyor 100 and the dewatering roll unit 96, and also a covering belt 200 mentioned below.
- the heating and drying unit 171 is a location for heating and drying the wet paper RP 0 on the smooth surface belt 145 and the covering belt 200 of the recycled paper smoothing processing unit 10, and specifically the smooth surface belt 145 conveying and supporting the lower side of the wet paper RP 0 is heated from the lower side by a heater plate 180 disposed in the midst of its running route.
- This heater plate 180 in the illustrated preferred embodiment is specifically formed as a heater plate sliding and contacting with the opposite side of the conveying and supporting side of the wet paper RP 0 on the smooth surface belt 145, and is provided in the horizontal running portion of the running route of the smooth surface belt 145, and is disposed to slide and contact with the opposite side of the upper side of the holding side of the wet paper RP 0 on the smooth surface belt 145, that is, the lower side.
- the wet paper RP 0 on the smooth surface belt 145 is indirectly heated and dried by way of the smooth surface belt 145 heated by the heater plate 180.
- the recycled paper smoothing processing unit (recycled paper smoothing device, recycled paper smoothing processing means) 10 is formed as pressing means for pressing the entire wet paper RP 0 conveyed on the smooth surface belt 145 of the drying conveyor 170 with a uniform pressure from the upper side, in the heating and drying unit 171.
- the recycled paper smoothing processing unit 10 formed as pressing means specifically includes a covering belt conveyor 190, and a plurality of pressing rollers 191, 191, ..., as shown in Fig. 1 and Fig. 5 .
- the covering belt conveyor 190 runs while covering the entire wet paper RP 0 on the smooth surface belt 145 in an enclosed or sandwiched state together with the smooth surface belt 145, and a covering belt 200 for covering the entire wet paper RP 0 from the upper side is disposed to run straightly in a same horizontal direction in an overlapped state with the smooth surface belt 145.
- the covering belt conveyor 190 includes the covering belt 200 formed as an endless belt conveying and carrying the wet paper RP 0 on the smooth surface belt 145 in an enclosed or sandwiched state together with the smooth surface belt 145, and the drive motor 106 for moving and driving this covering belt 200.
- the covering belt 200 is specifically made of a mesh belt of an air permeable mesh structure formed of numerous mesh cells for permeating the steam heated and evaporated from the wet paper RP 0 .
- the plate member of the permeable structure for composing the covering belt 200 is a material capable of passing and releasing the moisture heated and evaporated from the wet paper RP 0 on the smooth surface belt 145 smoothly to the upper side by way numerous mesh cells, and preferred materials are same as in the case of the mesh belt 105 of the paper making unit 4 mentioned above, including polypropylene (PP), polyethylene terephthalate (PET), polyamide (PA) (generally known as Nylon, a registered trademark), stainless steel (SUS), and other corrosion resistant materials, and in the illustrated preferred embodiment, a PET-made mesh belt 200 excellent in heat resistance is used.
- PP polypropylene
- PET polyethylene terephthalate
- PA polyamide
- SUS stainless steel
- the permeable mesh structure of the mesh belt 200 is preferably a material of fine mesh cells and fine weaving cells, and specifically, the material is selected depending on the desired characteristics of the obtained paper, same as in the case of the mesh belt 105 of the paper making unit 4 mentioned above.
- the mesh size of the mesh belt 200 is set larger than that of the mesh belt 105 of the paper making unit 4, due to difference in the purpose, and is preferably set at about 12 mesh cells to 40 mesh cells (about four times of the mesh size of the mesh belt 105) , and in the illustrated preferred embodiment, the mesh belt 200 of 25 mesh cells is used.
- the mesh belt 200 is not particularly strict in the design conditions as compared with the mesh belt 105 forming the core of the paper making unit 4, as far as having appropriate properties, including the heat resistance to withstand the high temperature of heating and drying, and the permeability for passing the steam heated and evaporated from the wet paper RP 0 , and in the illustrated preferred embodiment, the mesh belt 200 is a plain-woven PET-made mesh belt of 25 mesh cells.
- the width dimension of the mesh belt 200 is set to a same width dimension as the smooth surface belt 145 in order to overlap with the smooth surface belt 145 and enclose the wet paper RP 0 in a sandwich state.
- the mesh belt 200 is suspended and supported rotatably by way of a drive roller 205, a driven roller 206, and pressing rollers 191, 191, ..., as shown in Fig. 1 and Fig. 5 , and is driven and coupled to the drive motor 106 by way of the drive roller 205.
- the covering range of the mesh belt 200 on the wet paper RP 0 (recycled paper RP) is set opposite to the heater plate 180 in a horizontal running portion in the running route of the smooth surface belt 145.
- the pressing rollers 191, 191, ... are for pressing the mesh belt 200 from the upper side, and are arranged in plural parallel rows at specific intervals in the running direction of the covering belt 200 in the covering range of the covering belt 200 on the wet paper RP 0 (recycled paper RP) , and therefore the covering belt 200 presses the wet paper RP 0 on the smooth surface belt 145 with a uniform pressure in the overall length of the covering range, and the wet paper RP 0 (recycled paper RP) is not warped or wrinkled, and it is configured to finish the opposite side of the surface of the one side of the wet paper RP 0 (recycled paper RP) contacting with the surface of the smooth surface belt 145 to an appropriate smooth surface.
- These pressing rollers 191, 191, ... are formed as solid cylindrical rolls of small diameter made of a material of high rigidity, and the configuration of these pressing rollers 191, 191, ... is determined to form an average smoothing action surface for smoothing and processing the entire wet paper RP 0 (recycled paper RP) at least in cooperation between the lower side of the covering belt 200 and the upper side of the smooth surface belt 145.
- the pressing rollers 191, 191, ... in the illustrated preferred embodiment are formed as solid metal rollers having an outside diameter dimension capable of holding a pressing roller disposition interval for forming and maintaining the smoothing action surface of the covering belt 200, and are rotatably supported on an apparatus machine body 54 (a specific supporting structure is not shown).
- the number of the pressing rollers 191, 191, ... is not specified, and may be increased or decreased appropriately depending on the purpose in a range satisfying the above conditions.
- the lower side of the wet paper RP 0 is conveyed and supported by the smooth surface belt 145, and its upper side is covered, conveyed and supported by the mesh belt 200, and the plurality of pressing rollers 191, 191, ... of small diameter disposed at narrow pitches press the mesh belt 200 from the upper side with a uniform pressure.
- the wet paper RP 0 is held and conveyed with a uniform pressure, and wrinkles and warps of the wet paper RP 0 caused in the preceding process of the paper making process can be effectively eliminated and removed, and occurrence of wrinkle or warp of the wet paper by the heating and drying action by the heater plate 180 can be effectively prevented, and by an adequate permeability of the mesh belt 200 of the upper side, the whole surface of the wet paper RP 0 can be uniformly dried, so that the wet paper RP 0 is reborn as a recycled paper (dry paper) RP of a smooth surface on the whole.
- the running speed of the mesh belt 200 is controlled in synchronism with the running speed of the smooth surface belt 145 of the drying conveyor 170 in the drying process unit, and a recycled paper of smooth and desired paper quality is obtained.
- the running speed of the mesh belt 200 of the upper side is not synchronized with the conveying speed of the smooth surface belt 145 at the lower side, the wet paper RP 0 (or dry paper (recycled paper RP) ) may be loosened and wrinkled, or may be torn apart, to the contrary, by an excessive tension, and desired smoothing and processing effects are not obtained.
- the running speed of the mesh belt 200 must be synchronized with the conveying speed of the smooth surface belt 145 of the drying process unit 170.
- the driving sources of the both belts 145, 200 are a common drive motor 106, and the running speeds of the both belts 145, 200 are synchronized by the mechanical structure of the drive transmission system.
- a peeling member 210 is provided, and the dry paper dried and conveyed on the smooth surface belt 145, that is, the recycled paper RP (water content 10 to 7%) is sequentially peeled from the holding side of the smooth surface belt 145.
- a fixed size cutter unit 211 is provided at the terminal end position of the running route of the smooth surface belt 145 at the downstream side of this peeling member 210, and the recycled paper RP peeled off from the smooth surface belt 145 is cut to a specified size (an A4 format in the illustrated preferred embodiment), and is discharged from the discharge port 8 of the apparatus case 6.
- the apparatus control unit 5 is for controlling automatically in mutual cooperation of the actions of the drive parts of the pulp making unit 2, the pulp concentration adjustment unit 3, and the paper making unit 4, and is specifically composed of a microcomputer including a CPU, ROMs, RAMs, and I/O ports.
- This apparatus control unit 5 incorporates programs for executing the pulp making process of the pulp making unit 2, the concentration adjusting process of the concentration adjustment unit 3, and the paper making process of the paper making unit 4, by interacting with each other, and also stores various items of information necessary for driving of the components 2 (20, 21), 3 (3A, 3B), and 4 (95, 96, 97, 10), for example, the driving time and rotating speed of the agitating device 26 in the macerating unit 20, the water feed timing and water feed amount of the water feed device 27, the driving time and circulation amount of the circulation pump 69 in the beating unit 21, the driving time and rotating speed of the grinder 50, the adjusting timing and beating gap G adjusting amount of the gap adjusting means 57, the running speed of the conveyors 100, 170 in the paper making unit 4, the driving time of the heating and drying unit 171, and the operation timing of the fixed size cutter unit 211, preliminarily as data, or from the keyboard as appropriate selective input data.
- the weight sensors 48, 87, and the drive units 35, 41, 56, 61, 66, 106 are connected electrically, and the apparatus control unit 5 controls these drive units 35, 41, 56, 61, 66, 106 according to the measured values and the control data.
- the used paper recycling apparatus 1 having such configuration is started when the power source is turned on, and the components 2 (20, 21), 3 (3A, 3B), and 4 (95, 10, 96) are controlled automatically by the apparatus control unit 5 in mutual interaction, and the used paper UP, UP, ...
- the wet paper RP 0 manufactured on the paper making net conveyor 100 in the paper making process unit can be securely reproduced as a wrinkle-free and smooth recycled paper RP.
- the wet paper RP 0 manufactured in the paper making belt conveyor unit (the paper making process unit) 95 is conveyed, heated and dried by the smooth surface belt 145 in the heating and drying unit 171 of the next drying belt conveyor unit (the drying process unit) 97, and the entire wet paper is pressed with a uniform pressure from the upper side by the recycled paper smoothing processing unit (the recycled paper smoothing device, recycled paper smoothing processing means) 10 formed as pressing means.
- the recycled paper smoothing processing unit 10 includes a covering belt conveyor 191 having a covering belt 200 running while covering the entire wet paper RP 0 (recycled paper RP) on the smooth surface belt 145 by carrying together with the smooth surface belt 145, and a plurality of pressing rollers 191, 191, ... disposed at specified intervals in the running direction of the covering belt 200 for pressing this covering belt 200 from the upper side, and therefore the wet paper RP 0 (recycled paper RP) on the smooth surface belt 145 for conveying and passing the heating and drying unit 171 is covered by the covering belt conveyor 190 from the upper side, and is pressed by the plurality of pressing rollers 191, 191, ... disposed continuously with a specified pressure uniformly from the upper and lower sides in a sandwich state, and is hence heated and dried.
- a covering belt conveyor 191 having a covering belt 200 running while covering the entire wet paper RP 0 (recycled paper RP) on the smooth surface belt 145 by carrying together with the smooth surface belt 145, and
- the wet paper RP 0 (recycled paper RP) is heated and dried while being held in a flat state by the sandwich structure at a specified pressure, and wrinkles and warps formed in the wet paper RP 0 in the preceding process of the paper making process can be effectively eliminated and removed, and occurrence of wrinkle or warp of the wet paper RP 0 (recycled paper RP) by the heating and drying action can be effectively prevented, and a recycled paper of a smooth surface on the whole can be obtained.
- the covering belt 200 of the covering belt conveyor 190 is formed as a mesh belt composed of numerous mesh cells capable of passing and releasing the moisture heated and evaporated from the wet paper RP 0 on the smooth surface belt 145 to the upper side, in site of the presence of the covering belt 200, the steam generated by heating of the wet paper RP 0 can be effectively lifted and dissipated, and the drying process is promoted smoothly.
- the running speed of the mesh belt for composing the covering belt 200 is controlled in synchronism with the running speed of the smooth surface belt 145 in the drying process unit, the wet paper RP 0 is heated and dried while being held in the sandwich structure stably.
- the specific configuration of the recycled paper smoothing processing unit (the recycled paper smoothing device, recycled paper smoothing processing means) 10 may not be limited to the configuration of the illustrated preferred embodiment, but may be formed in other configuration having similar functions.
- the drive motor 106 for moving and driving the smooth surface belt 145 is also used as the moving and driving source of the covering belt 200, and hence the running speeds of the two belts 145, 200 are synchronized by the mechanical structure of the drive transmission system, but the belts 145, 200 may be separately driven by independent and individual driving sources, and these driving sources may be controlled synchronously and electrically by the apparatus control unit 5.
Description
- The present invention relates to a paper making device for a furniture-sized used paper recycling apparatus according to the preamble portion of
claim 1. - Used paper of various types such as used and unnecessary documents occurs not only in government offices or private companies, but also in daily life or general household. Used paper is usually discarded, incinerated, or disposed as refuse.
- On the other hand. In the global concern about effective use of limited resources on earth, various technologies have been developed to regenerate and recycle the used paper being disposed and discarded so far.
- Such used paper recycling technologies are mostly installed and executed in the paper making industry, and the used paper recycling plant requires, like the ordinary paper making plant, a vast land, an immense investment, and a huge quantity of water and chemicals for the purpose of high speed and mass production and high quality of recycled paper.
- For recycling of used paper, a tremendous manual labor is needed for collecting used paper, and used paper collection involves various problems, such as mixing of foreign matter by multiple garbage collectors, defective classification due to lack of knowledge about used paper recycling, and entry of harmful objects, and if used paper is collected, in order to regenerate or recycle by 100 percent as recycled paper, final checking by specialists and cleaning works are needed. On the other hand, confidential documents are not easily recycled and are mostly incinerated, and the recycling rate is low.
- To solve these problems of used paper recycling, an effective method is the development of a technology capable of recycling at the site of origin of used paper, and from such point of view, a new system is developed and proposed by the present applicant, for example, in Japanese Patent Application Laid-Open No.
2007-308837 - This used paper recycling apparatus is a realization of used paper recycling technology of large scale such as used paper recycling plant in a small size that can be installed in a small shop or a room in general household, and includes, in an apparatus case of furniture size, a pulp making unit for macerating and beating used paper to manufacture used paper pulp, a paper making unit for making recycled paper from the used paper pulp manufactured in this pulp making unit, and a control unit for driving and controlling the pulp making unit and the paper making unit in cooperation, in which the paper making unit includes a paper making process unit for manufacturing wet paper from the used paper pulp sent from the pulp making unit, and a drying process unit for manufacturing recycled paper by drying the wet paper manufactured in this paper making process unit, and these two process units are composed in a form of belt conveyor having a running belt for processing and conveying the used paper pulp.
- The used paper is macerated and beaten in the pulp making unit to become used paper pulp, and then this used paper pulp is conveyed on the running belt of the belt conveyor in the paper making unit, and is filtered and dewatered, squeeze and dewatered, and heated and dried, and is formed into recycled paper. In this case, in the stage of pulp, the used paper is decomposed to fiber level, and the printed characters and diagrams are completely decomposed and lost, and cannot be restored, so that leak or disclosure of confidential information or personal information composed in printed characters and diagrams can be securely prevented.
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EP 2014862 A2 discloses a used paper recycling device having the features of the preamble ofClaim 1. - It is a primary object of the present invention to present a novel generated paper smoothing technology of a used paper recycling apparatus having solved such conventional problems.
- It is other object of the present invention to present a recycled paper smoothing technology capable of recycling securely into a smooth and wrinkle-free recycled paper from wet paper made and formed in a paper making process unit of a paper making unit, in a very narrow used paper processing space of a used paper recycling apparatus of furniture size to be installed not only in a large office, but also in a small shop or a room in general household, by further improving the configuration of the drying process unit in the paper making unit of the used paper recyding apparatus.
- To achieve these objects, a paper making device according to a further aspect of the invention comprises the features of the characterizing portion of
Claim 1. - Preferred features of this aspect of the invention are set out in
Claims 2 to 11. A second aspect of the invention provides a used paper recycling apparatus. - These and other objects and features of the present invention will be appreciated by reading the detailed description made in conjunction with the accompanying drawings, and novel facts pointed out in the claims thereof.
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Fig. 1 is a front sectional view of an overall outline configuration of a used paper recycling apparatus in a preferred embodiment of the present invention. -
Fig. 2 is a side sectional view of an overall outline configuration of the same used paper recycling apparatus. -
Fig. 3 is a circuit diagram of configuration of a used paper circulation route of a beating unit of the used paper recycling apparatus. -
Fig. 4 is a block diagram of configuration of a pulp concentration adjustment unit of the used paper recycling apparatus. -
Fig. 5 is a perspective view of an overall outline configuration of a paper making unit of the used paper recycling apparatus. -
Fig. 6 is a perspective view of outline configuration of the used paper recycling apparatus. - A preferred embodiment of the present invention is specifically described below while referring to the accompanying drawings. Throughout the drawings, same reference numerals refer to same components or elements.
- The used paper recycling apparatus of the present invention is shown in
Fig. 1 to Fig. 6 , and this usedpaper recycling apparatus 1 is specifically installed at the site of origin of used paper, and it is an apparatus for recycling into a re-usable paper at the site without discarding the generated used paper UP, and the used paper UP includes confidential documents of government offices or private companies, personal letters and others in the general household, and other used and unnecessary documents. - The used
paper recycling apparatus 1 is a furniture size as shown inFig. 6 , that is, small in size and shape similar to furniture, such as document rack, locker, office desk, copier or personal computer used in an office, and mainly includes, as shown inFig. 1 , apulp making unit 2, a pulpconcentration adjustment unit 3, a paper making unit (paper making device) 4, and an apparatus control unit (control unit) 5, and the paper making unit 4 includes a recycled paper smoothing processing unit (recycled paper smoothing device, recycled paper smoothing processing means) 10 as a characteristic component of the present invention. - These
apparatus component units 2 to 5 are built in a compact design to be installed in anapparatus case 6. Theapparatus case 6 is a furniture size as mentioned above, and may be designed in specific dimensions and shapes appropriately depending on the purpose or application. Theapparatus case 6 in the illustrated preferred embodiment is a rectangular box having dimensions and shapes similar to a copier installed and used in a general office, and the top plate of theapparatus case 6 has an inlet 7 which is opened and closed for supplying used paper UP, and andischarge port 8 is provided at the side for discharging recycled paper RP, RP, .... At the lower edge portion of thisdischarge port 8, a recycled paper receiving tray 9 is detachably provided for receiving recycled paper RP, RP, ... discharged from thedischarge port 8. - The pulp making
unit 2 is a process location for manufacturing used paper pulp by macerating and beating the used paper UP, and is composed of a maceratingunit 20 for agitating, crushing and macerating the used paper UP, and a beatingunit 21 for beating the used paper UP macerated in themacerating unit 20. - The
macerating tank 25 has the inlet 7 formed in its ceiling wall as shown inFig. 2 for charging and supplying the used paper UP, and adischarge port 28 is provided in its bottom wall for discharging the macerated used paper pulp UPP to the downstream side. The inner volume of themacerating tank 25 is determined depending on the number of sheets of used paper UP to be processed in batch. In the illustrated preferred embodiment, themacerating tank 25 has a capacity of agitating and treating (in batch) a total of about 500 sheets (about 2000 g) of used paper UP of A4 format PPC (plain paper copier) by adding about 98 liters of water. In this case, the concentration of the used paper pulp UPP to be macerated is about 2%. The concentration is adjusted by supplying water from thewater feed device 27, and thiswater feed device 27 is a part of the pulpconcentration adjustment unit 3 described below. - The inlet 7 has a structure to be opened and closed to the outside of a
case cover 6a of theapparatus case 6. Thedischarge port 28 is opened and closed by an opening andclosing valve 29, and communicates with a used paperpulp circulation route 49 described below. At the location of thedischarge port 28, adebris filter 30 is provided for removing obstacles for the next beating process, such as clips, staples, pins and others used for binding the used paper UP, UP, .... - The opening and
closing valve 29 opens and closes specifically by the crank motion of acrank mechanism 36 driven by adrive motor 35. Thedrive motor 35 is specifically an electric motor, and thisdrive motor 35 is electrically connected to theapparatus control unit 5. - The
agitating device 26 is provided inside of the maceratingtank 25, and includes anagitation impeller 40 and adrive motor 41. - The
agitation impeller 40 has itsrotation shaft 40a supported rotatably in an upright position in the central position of the bottom of themaceration tank 25, and is rotatable in the horizontal direction, and the lower end of therotation shaft 40a is driven and coupled to arotation shaft 41a of thedrive motor 41 by way of transmission means 4 2 composed of atransmission pulley 42a, atransmission belt 42b, and atransmission pulley 42c. - The
water feed device 27 is to supply water W into themacerating tank 25, and forms a beatingconcentration adjustment unit 3A of the pulpconcentration adjustment unit 3 as described below. - The
water feed device 27 in the illustrated preferred embodiment includes, as shown inFig. 1 , a whitewater collection tank 45, awater feed pump 46 for beating concentration adjustment, and awater feed tank 47 for paper making concentration adjustment. The whitewater collection tank 45 is, as described below, designed to collect white water W (pulp water of very low concentration filtered through a paper making mesh in the paper making process) filtered and dewatered in the paper making unit 4, and the white water W collected in the whitewater collection tank 45 is first supplied into themacerating tank 25 from thewater feed pump 46, and then into aconcentration adjustment tank 85 described below from thewater feed pump 47. - In this relation, in the bottom of the
macerating tank 25, aweight sensor 48 is provided, and the used paper UP, UP, ... and the water to be processed in batch in themacerating tank 25 are weighed and controlled, and theweight sensor 48 is electrically connected to theapparatus control unit 5. - The
weight sensor 48 of the illustrated preferred embodiment is a load cell, and is designed to sense and measure the total weight of weight of maceratingtank 25, and weight of used paper UP, UP, ... and water charged and supplied in themacerating tank 25. - In a specific control constitution of the
macerating unit 20, in the first place, when the inlet 7 is opened by the operator, and the used paper UP, UP, ... are charged into themacerating tank 25, the weight is sensed and measured by theweight sensor 48, and when reaching a specified weight (number of sheets), the operator is informed of it by sound and/or display. According to the display, when the operator closes the inlet 7, thewater feed device 27 is driven, and the water W in the whitewater collection tank 45 is supplied by thewater feed pump 46 into themacerating tank 25 by the portion corresponding to the charged weight of used paper UP, UP, ... (the number of sheets) . - When the operator closes the outlet 7 after charging an arbitrary amount of used paper UP, UP, ... into the
macerating tank 25 from the inlet 7 (an amount smaller than the specified weight (number of sheets)), the weight is sensed and measured by theweight sensor 48, and thewater feed device 27 is driven, and the water W corresponding to the measured result is supplied by thewater feed pump 46 into themacerating tank 25 from the whitewater collection tank 45. - In the illustrated preferred embodiment, as mentioned above, when PPC used paper UP of A4 format is supplied into the
macerating tank 25 by about a maximum capacity, about 500 sheets (about 2000 g), at this moment, it is noticed to the operator by sound and/or display, and by the closing operation of the inlet 7, about 98 liters of water is supplied from thewater feed device 27, or when an arbitrary amount of used paper UP, UP, ... is supplied (an amount smaller than the specified weight (number of sheets)), the water corresponding to the supplied amount of used paper is added to thewater feed device 27, and the concentration of the used paper pulp UPP to be macerated is controlled and adjusted to about 2%. - Thus, in the
agitating device 26, the used paper UP, UP, ... charged into the maceratingtank 25 from the charging opening of theapparatus case 6, that is, the inlet 7 are agitated and mixed for a specified time (10 to 20 minutes in the illustrated preferred embodiment) in the water supplied from thewater feed device 27 by normal and reverse rotation of theagitation impeller 40 by thedrive motor 41, and thereby the used paper UP, UP, ... are macerated and beaten into used paper pulp UPP. - The
discharge port 28 of themacerating tank 25 is closed by the opening andclosing valve 29 during operation of themacerating unit 20, and flow of used paper UP or used paper pulp UPP from themacerating tank 25 into the used paperpulp circulation route 49 is blocked, while thedischarge port 28 is opened by the opening andclosing valve 29 during operation of the beatingunit 21 described later, and the flowing and circulating loop of the used paper pulp UPP from themacerating tank 25 into the used paperpulp circulation route 49 is allowed. - The beating
unit 21 is a process location for beating the used paper UP macerated in themacerating unit 20, and is specifically designed to pressurize and beat the used paper UP macerated in the maceratingunit 20, and to grind and pulverize (into micro-fibers) the inks forming characters and patterns on the used paper UP (printing inks forming characters and patterns on the used paper UP by various printing technologies, or inks forming characters and patterns on the used paper UP by pencil, ball-point pen, fountain pen, and other writing tools). - This beating
unit 21 includes agrinder 50 as a principal component. Thisgrinder 50 includes, as shown inFig. 3 , a pair of beatingdisks disks action surfaces - The beating gap G of the beating
action surfaces grinder 50 is determined so as to be narrowed gradually, as described below, from thegrinder 50 in an initial period of beating process to thegrinder 50 in a later period. - In the
beating unit 21 of the present preferred embodiment, as shown inFig. 3 , the used paperpulp circulation route 49 having onegrinder 50 is formed, and the used paper pulp UPP is circulated and beaten for a specified time by way of thegrinder 50 in a circulation system. - By execution of the beating process in the used paper
pulp circulation route 49, in spite of the small and narrow process space in theapparatus case 6 of furniture size, a used paper pulp beating process route of basically infinite length not limited in length is formed, and the beating process space equally compared with the beating process of a large-scale apparatus is realized, and an optimum beating effect is obtained depending on the purpose. - Moreover, one
grinder 50 carries out the whole beating process throughout the entire process of the beating process, and this onegrinder 50 has the functions of a plurality of grinders from the grinder in an initial period of beating process to the grinder in a later period. More specifically, the beating gap G of the beatingaction surfaces grinder 50 is controlled and adjusted so as to be narrower gradually from the initial period to the final period of the beating process. - The
grinder 50 of the illustrated preferred embodiment is disposed, as shown inFig. 2 , adjacently to the maceratingtank 25 of the maceratingunit 20, on anapparatus machine body 54 composing theapparatus case 6, and as shown inFig. 3 , it further includes abeating tank 55 communicating with the maceratingtank 25 of the maceratingunit 20, the pair of beatingdisks beating tank 55, arotation drive source 56 for relatively rotating the pair of beatingdisks disks - The
beating tank 55 is formed in a closed cylindrical shape for accommodating the pair of beatingdisks supply port 55a for supplying the used paper pulp UPP from the upstream side, and adischarge port 55b for discharging the beaten used paper pulp UPP to the downstream side. - More specifically, the
supply port 55a is opened in the center of the bottom of thebeating tank 55 toward the vertical direction, and thedischarge port 55b is opened at the cylindrical side of thebeating tank 55 toward the horizontal direction. Thesupply port 55a and thedischarge port 55b are connected to communicate with the maceratingtank 25 of the maceratingunit 20, respectively by way ofcirculation pipings Fig. 3 , and thedischarge port 55b is further connected to communicate with a used paperpulp collection tank 60 by way of adischarge piping 59. -
Reference numeral 61 shows a direction changeover valve, by the changeover operation of thisdirection changeover valve 61, the used paper pulp UPP discharged from thedischarge port 55b is selectively returned to the maceratingtank 25, or collected in the used paperpulp collection tank 60. Thedirection changeover valve 61 is specifically an electromagnetic valve, and is electrically connected to theapparatus control unit 5. - Of the pair of beating
disks side beating disk 51 is the rotating side, and the lowerside beating disk 52 is the fixed side, and the rotatingside beating disk 51 of the upper side is disposed oppositely to the fixedside beating disk 52 of the lower side, concentrically and rotatably across a tiny beating gap G. The rotatingside beating disk 51 is driven and coupled to adrive motor 56 by way of a rotationmain shaft 64 pivoted rotatably to the fixed side of theapparatus machine body 54 and movably in the axial direction. - Although not shown specifically, the rotation
main shaft 64 is rotatably pivoted on an elevating member of the gap adjusting means 57, and the rotatingside beating disk 51 is concentrically and integrally attached at its leading end, and its base end part is driven and coupled integrally in the rotating direction and relatively movably in the axial direction on the rotation shaft of thedrive motor 56. - The
drive motor 56 is a rotation drive source, and relatively rotates the pair of beatingdisks drive motor 56 as its drive source is electrically connected to theapparatus control unit 5. - The
opposite sides disks beating action surfaces action surfaces Fig. 3 , formed in a taper shape continuously increased in the diameter size in the mutually opposite directions, and are formed as annular flat surfaces parallel to each other at the outermost peripheral edges, and these annular flat surfaces form the beating gap G. - In other words, in the pair of beating
disks action surface 52a of the fixedside beating disk 52, an inlet 70 is formed to communicate coaxially with thesupply port 55a of the beating tank, and the two annular flat surfaces formed on the outer peripheral edges of the beatingaction surfaces disks outlet 71 communicating with thedischarge port 55b of thebeating tank 55 and having the beating gap G. - On the outer circumference of the rotating
side beating disk 51, a plurality ofblades blades outlet 71 in pumping action toward thedischarge port 55b of thebeating tank 55b by centrifugal force by rotation of the rotatingside beating disk 51. - By the
drive motor 56 as the drive source, when the rotatingside beating disk 51 is rotated and driven to the fixedside beating disk 52, the used paper pulp UPP supplied into a beating space B by way of thesupply port 55a of thebeating tank 55 and the inlet 70 from the maceratingtank 25 of the maceratingunit 20 flows into the beating space B from the inlet 70, and passes through this beating space B, and is pressurized and beaten by the relatively rotatingbeating action surfaces discharge port 55b of thebeating tank 55 from theoutlet 71. - At the time of discharge from this
outlet 71, the used paper pulp UPP is further pressurized and beaten at the location of theoutlet 71 having the beating gap G, and is pulverized to a specified micron size (to become micro-fiber) defined by this beating gap G. - In this regard, in the present preferred embodiment, as mentioned above, in the circulation system beating process disposing only one
grinder 50 in the used paper pulp circulation route 49 (seeFig. 3 ), this onegrinder 50 has the functions of a plurality of grinders from the grinder in an initial period of beating process to the grinder in a terminal period, and more specifically, the beating gap G of thegrinder 50 is controlled and adjusted by the gap adjusting means 57 so as to be narrower gradually from the initial period to the final period of the beating process. - The gap adjusting means 57 is not particularly illustrated, but is designed to move the pair of beating
disks disks side beating disk 51 in the rotation axial direction, that is, in the axial direction of a rotationmain shaft 64, and adrive source 66 for driving this moving means. The drive source is specifically an electric motor, and thisdrive motor 66 is electrically connected to theapparatus control unit 5. - By the rotation of this
electric motor 66, the rotatingmain shaft 64 is moved up and down by way of the moving means, and therefore the rotatingside beating disk 51 formed integrally with the rotationmain shaft 64 is moved in the vertical direction to the fixedside beating disk 52, that is, in the rotation axial direction, and the beating gap G between the twobeating disks - For this purpose, a position detection sensor (not shown) is provided for detecting the ascending and descending position of the rotating
side beating disk 51, and depending on the result of detection by this position detection sensor, thedrive motor 66 is driven and controlled. The position detection sensor is electrically connected to theapparatus control unit 5. - The beating gap G of the beating
disks pulp circulation route 49 shown inFig. 3 , in mutual interaction with acirculation pump 69 which is circulating means. - That is, in
Fig. 3 , the used paper pulp UPP macerated by the maceratingunit 20 is circulated through the used paperpulp circulation route 49 by thecirculation pump 69, and is beaten by thegrinder 50, and at this time the beating gap G of the beatingaction surfaces grinder 50 is controlled by the gap adjusting means 57 so as to be narrower gradually from the initial period to the terminal period of the beating process. - In the used paper
pulp circulation route 49, the maceratingtank 25 of the maceratingunit 20 is included, and in this beating process, the agitatingdevice 26 of the maceratingunit 20 is driven and controlled, and the maceratingunit 20 is driven simultaneously with thebeating unit 21. That is, in the circulation system beating process, the used paper pulp UPP flows out into the used paperpulp circulation route 49 from the maceratingtank 25, while the used paper pulp UPP beaten by thegrinder 50 flows into the maceratingtank 25, and therefore in the maceratingtank 25, the used paper pulp UPP of different degrees of beating is mixed, and by the agitating action by the agitatingdevice 26, the degree of beating of the used paper pulp UPP in the maceratingtank 25 is made uniform, and the beating process is promoted. - The used paper
pulp collection tank 60 is a location for collecting the used paper pulp UPP beaten and pulverized to a desired size by the beatingunit 21, and the used paper pulp UPP collected herein is mixed and adjusted to a paper making concentration corresponding to the finished paper quality of the recycled paper RP to be regenerated as a pulp suspension PS by the pulpconcentration adjustment unit 3, and is sent to the paper making unit 4 in a next paper making process. - The pulp
concentration adjusting unit 3 is a weight type device for adjusting the concentration of the used paper pulp UPP supplied in the paper making unit 4, by measuring the weight and adjusting the mixing rate of used paper UP and water W supplied into the apparatus, and more specifically as shown inFig. 4 , it includes a beatingconcentration adjusting unit 3A, a paper makingconcentration adjusting unit 3B, and a pulpconcentration adjusting unit 3C. - The beating
concentration adjusting unit 3A is to adjust the beating concentration of the used paper pulp UPP in thepulp making unit 2, corresponding to the beating efficiency by the beatingunit 21, and as mentioned above, it is mainly composed of thewater feed pump 46 and the beatingconcentration control unit 75 for adjusting the beating concentration of thewater feed device 27. - The supply amount of white water W by the
water feed pump 46 of the beatingconcentration adjusting unit 3A is preferred to be set so that the beating concentration of the used paper pulp UPP macerated and beaten by the agitatingdevice 26 may be, for example, the maximum concentration allowable for the beating capacity of thegrinder 50 of thebeating unit 21 for executing the next step of the beating process, and in the illustrated preferred embodiment, it is set to be a beating concentration of about 2% as mentioned above. - The beating
concentration control unit 75 drives and controls thewater feed pump 46 so as to supply a necessary amount of water W into the maceratingtank 25, as mentioned above, depending on the result of measurement from theweight sensor 48. This beatingconcentration control unit 75 composes a part of theapparatus control unit 5 as described below. - The paper making
concentration adjusting unit 3B is to adjust the paper making concentration of the used paper pulp UPP in the paper making unit 4, to an appropriate concentration corresponding to the finished paper quality of the recycled paper RP to be regenerated, and is more specifically designed to adjust the concentration of the used paper pulp UPP manufactured in thepulp making unit 2 by a division system, and it mainly includes adivision extraction unit 80, asuspension preparing unit 81, and a paper makingconcentration control unit 82. - The
division extraction unit 80 is to divide and extract by a specified small portion from the total volume of the used paper pulp UPP manufactured in thepulp making unit 2 in the preceding process, and includes a used paperpulp supply pump 86 for division and extraction for extracting the used paper pulp UPP of the used paperpulp collection tank 60 and sending to aconcentration adjusting tank 85. - The
suspension preparing unit 81 is to prepare a pulp suspension PS of a specified concentration by adding a prescribed amount of water W for concentration adjustment to the specified small portion of the used paper pulp UPP divided and extracted by thedivision extraction unit 80, and mainly includes awater feed pump 47 of thewater feed device 27. - Although not shown specifically, in the bottom of the
concentration adjusting tank 85, same as in the case of the maceratingtank 25 mentioned above, aweight sensor 87 composed of a load cell is provided, and is designed to measure and control the amount of the used paper pulp UPP and water W for concentration adjustment supplied into theconcentration adjusting tank 85, and theweight sensor 87 is electrically connected to theapparatus control unit 5. - The paper making
concentration control unit 82 controls by interacting thedivision extraction unit 80 and thesuspension preparing unit 81, and forms a part of theapparatus control unit 5, and controls thepumps division extraction unit 80 and thesuspension preparing unit 81 by interaction so as to execute the following step of the paper making concentration adjusting process. - First of all, from the whole volume of the used paper pulp UPP collected into the used paper
pulp collection tank 60 from the beating unit 21 (in the illustrated preferred embodiment, about 2000 g of used paper UP + 100 L of water W) , the used paper pulp UPP of a specified portion (1 L in the illustrated preferred embodiment) is divided by the used paperpulp supply pump 86, and is transferred and contained in theconcentration adjusting tank 85. As a result, its weight is sensed and measured by theweight sensor 87, and the result is sent to theapparatus control unit 5. - In succession, corresponding to the specified portion of the divided used paper pulp UPP, diluting water W is supplied by the
water feed pump 47 into theconcentration adjusting tank 85 from the whitewater collection tank 45 by a specified volume (9 L in the illustrated preferred embodiment, actually as weighed and measured by the weight sensor 87). - As a result, in the
concentration adjusting tank 85, the used paper pulp UPP of beating concentration (2% in the illustrated preferred embodiment) and the water W are mixed and diluted, and a pulp suspension PS of a specified concentration (about 0.2% concentration or target concentration in the illustrated preferred embodiment) is mixed and prepared. - The target concentration of the pulp suspension PS to be prepared is determined in consideration of the paper making capacity in the paper making unit 4 described below on the basis of the results of the preliminary experiment, and it is set to about 0.2% in the illustrated preferred embodiment as mentioned above.
- In this way, the pulp suspension PS prepared to the paper making concentration (0.2%) of the target concentration in the
concentration adjusting tank 85 is transferred and supplied into apulp supply tank 89 from theconcentration adjusting tank 85 by a firstsuspension supply pump 88, and is stored in preparation for the next process of paper making unit 4. Thereafter, this paper making concentration adjustment process is repeated similarly for the entire volume of the used paper pulp UPP in the used paperpulp collection tank 60. Thepulp supply tank 89 is provided with a secondsuspension supply pump 90 for sending the pulp suspension PS into a paper makingbelt conveyor 95 of the paper making unit 4. - An agitating
device 91 is provided in thepulp supply tank 89, and by the agitating action of this agitatingdevice 91, the paper making concentration of the entire stored and held pulp suspension PS is uniformly kept at a specific value. - As described herein, the concentration adjustment by the paper making
concentration adjusting unit 3 is not done in batch of whole volume, but is done in divided portions, that is, in small portions, and the water consumption is saved substantially, and theconcentration adjusting tank 85 can be reduced in size and shape substantially, and hence the usedpaper recycling apparatus 1 is entirely built in a compact design. - The pulp
concentration control unit 3C is to drive and control the beatingconcentration adjusting unit 3A and the paper makingconcentration adjusting unit 3B in interlock, and specifically by receiving the pulp concentration control information (the charging amount of the used paper UP, the water supply amount into the maceratingtank 25, the beating concentration of the used paper pulp UPP, etc.) from the beatingconcentration control unit 75 of the beatingconcentration adjusting unit 3A, the paper making concentration information (the target paper making concentration of the used paper pulp UPP, the division extraction amount of the used paper pulp UPP from the used paperpulp collection tank 60, the water supply amount into theconcentration adjusting tank 85, etc.) for adjusting the concentration of the used paper pulp UPP manufactured in thepulp making unit 2 to the target concentration (the paper making concentration) depending on this control information sent to the paper makingconcentration control unit 82 of the paper makingconcentration adjusting unit 3B, and thereby the paper making concentration adjusting process is executed. - The paper making unit 4 is a process location for manufacturing recycled paper RP from the used paper pulp UPP manufactured in the
pulp making unit 2, and is mainly composed of, as shown inFig. 1 andFig. 5 , a paper makingbelt conveyor unit 95, adewatering roll unit 96, and a dryingbelt conveyor unit 97, and the dryingbelt conveyor unit 97 is provided with a recycled paper smoothing processing unit (recycled paper smoothing device, recycled paper smoothing processing means) 10 which is the characteristic component of the present invention as described above. - The paper making
belt conveyor unit 95 is a location for manufacturing wet paper by making from slurry-like pulp suspension PS composed of the water W and the used paper pulp UPP sent from thepulp supply tank 89 of thepulp making unit 2, and mainly includes a paper makingnet conveyor 100 and apulp supply unit 101. - The paper making
net onveyor 100 is for conveying the pulp suspension while making paper therefrom, and amesh belt 105 of paper making mesh structure composed of numerous mesh cells is disposed for filtering and dewatering the pulp suspension PS while running straightly in its running direction. - Specifically, the paper making
net onveyor 100 includes themesh belt 105 of an endless belt form for conveying the pulp suspension while making paper from pulp suspension PS, and adrive motor 106 for driving and moving thismesh belt 105. - The plate member of the paper making mesh structure for composing the
mesh belt 105 is a material capable of filtering and dewatering the pulp suspension PS appropriately by way of the numerous mesh cells of the paper making mesh structure, and preferred materials include polypropylene (PP), polyethylene terephthalate (PET), polyamide (PA) (generally known as Nylon, a registered trademark), stainless steel (SUS), and other corrosion resistant materials, and in the illustrated preferred embodiment, a PET-mademesh belt 105 excellent in heat resistance is used. - The paper making mesh structure of the
mesh belt 105 is preferably a material of fine mesh cells and fine weaving cells, and specifically, depending on the desired characteristics of the obtained paper, the following points are taken into consideration. - The mesh size of the
mesh belt 105 is preferably 25 mesh cells to 80 mesh cells, and in the illustrated preferred embodiment, themesh belt 105 of 50 mesh cells is used. - The mesh structure of the
mesh belt 105 is determined not only by the mesh size (mesh cells) but also by the mesh fiber diameter. At the same number of mesh cells, when the fiber diameter is larger, the mesh size is smaller, and when the diameter is smaller, the mesh size is larger, and this relation is expressed by the mesh voids or air permeability (cm3/cm2/sec), that is, the rate of permeating air. - For example, when the mesh size is fine and the permeability is poor, the water filtration rate is low, and, as a result, the shape and size of the
pulp supply unit 101 described below are extended in the running direction of themesh belt 105, and the apparatus becomes large in size. To the contrary, when the mesh size is coarse and the permeability is excellent, thepulp supply unit 101 is short and the apparatus is small in size, but the recycled paper RP is rough in paper quality, and the difference in smoothness of face and back surfaces becomes significant, and the smoothness of the paper is poor. - In consideration of these conditions, the
mesh belt 105 is formed in a mesh structure small in mesh fiber diameter, large in the number of mesh cells, and not lowered in the permeability, in order to prevent the used paper pulp UPP from slipping out of the mesh cells of themesh belt 105 in the paper making process, and in the illustrated preferred embodiment, themesh belt 105 is a 50-mesh PET-mademesh belt 105 of plain weaving. Thismesh belt 105 has been experimentally proved to produce an excellent paper quality without causing any particular problem in writing. - The width dimension of the
mesh belt 105 set at a specified width dimension slightly larger than the width dimension of the recycled paper RP to be manufactured from the pulp suspension PS. - The
mesh belt 105 is, as shown inFig. 1 andFig. 5 , suspended and supported rotatably by way of adrive roller 107, adewatering roll unit 96, a drivenroller 108, and asupport roller 109, and is driven and coupled to thedrive motor 106 by way of thedrive roller 107. - The paper making process length in the
mesh belt 105 is determined in a range of upper side running direction length of themesh belt 105 in theapparatus case 6 of furniture size (in the illustrated preferred embodiment, the lateral direction length from thepulp supply unit 101 to thedewatering roll unit 96 inFig. 1 ). - The running speed of the
mesh belt 105 is set in consideration of various conditions in the paper making process, and preferably set at 0.1 m/min to 1 m/min, and set at 0.2 m/min in the illustrated preferred embodiment. By contrast, in large-scale plant such as conventional used paper recycling factory, the running speed of the mesh belt of this type is set at least at 100 m/min or more, or even more than 1000 m/min in a faster version. - As shown in
Fig. 1 andFig. 5 , themesh belt 105 is disposed so as to run obliquely upward and straightly toward its running direction, and in the limited space of installation, the paper making process length can be extended considerably, and the filtering and dewatering rate is enhanced in the relation with the paper making mesh structure of themesh belt 105. - The
drive motor 106 for moving and driving themesh belt 105 is specifically an electric motor, and is connected electrically to theapparatus control unit 5. Thisdrive motor 106 is also used as the running and driving source of thedewatering roll unit 96 and the dryingbelt conveyor unit 97 described below. - The
pulp supply unit 101 is a location for supplying a pulp suspension PS onto themesh belt 105 from thepulp making unit 2, and although not specifically shown, by thispulp supply unit 101, the pulp suspension PS is spread uniformly on the top surface of themesh belt 105. Thepulp supply unit 101 is provided at the start end position of the paper making process of the paper makingnet conveyor 100. - By the second
suspension supply pump 90, the pulp suspension PS supplied into thepulp supply unit 101 from thepulp supply tank 89 is stored and reserved by a specified amount in thispulp supply unit 101, and by this reserving action, it is diffused uniformly on the top surface of themesh belt 105. The pulp suspension PS diffused uniformly on the top surface of themesh belt 105 is conveyed together with themesh belt 105 by the driving action of themesh belt 105 in the arrow direction, and is filtered by weight by the mesh cells of themesh belt 105, and is dewatered, and wet paper RP0 (water content 90 to 85% in the illustrated preferred embodiment) is obtained. - The white water W filtered and dewatered by this mesh belt 105 (pulp water of ultra-low concentration filtered by the paper making mesh in the paper making process) is collected in the white
water collection tank 45 of thewater feed device 27 as mentioned above. - The
dewatering roll unit 96 forms a location for squeezing and dewatering the wet paper RP0 on themesh belt 105 at the linkage position of the paper makingbelt conveyor unit 95 and the dryingbelt conveyor unit 97 described below. - Specifically, a
smooth surface belt 145 mentioned below of the dryingbelt conveyor unit 97 at the downstream side, and themesh belt 105 of the paper makingbelt conveyor unit 95 at the upstream side are disposed in upper and lower layers as shown inFig. 1 andFig. 5 , and the upper and lower adjacent portions of thesmooth surface belt 145 and themesh belt 105 are formed at the linkage portion, and at this linkage portion, thedewatering roll unit 96 rolls and compresses themesh belt 105 and thesmooth surface belt 145 from upper and lower sides, thereby dewatering the wet paper in compressed state. - The
dewatering roll unit 96 includes at least a preliminarydewatering roll unit 96A, and a finaldewatering roll unit 96B as principal components. - The
dewatering roll unit 96 in the illustrated preferred embodiment includes, as shown inFig. 1 , the preliminarydewatering roll unit 96A, the finaldewatering roll unit 96B, and an angle definingroll unit 96C as assisting means, as principal components. - The preliminary
dewatering roll unit 96A is for squeezing and dewatering preliminarily the wet paper RP0 on themesh belt 105, and specifically includes a preliminary squeezingroll pair 122 consisting of a preliminary dewatering roll 120 rolling on themesh belt 105 from the lower side, and a preliminary press roll 121 rolling and pressing on thesmooth surface belt 145 from the upper side in collaboration with the preliminary dewatering roll 120. - By the preliminary squeezing
roll pair 122 consisting of the preliminary dewatering roll 120 and the preliminary press roll 121, themesh belt 105 and thesmooth surface belt 145 are rolled and squeezed from both upper and lower sides at a specified preliminary pressure in a compressed state, and the water content in the wet paper RP0 on themesh belt 105 is removed preliminarily. - In this case, the preliminary pressure, that is, the preliminary squeezing force of the preliminary
dewatering roll unit 96A for preliminarily squeezing and dewatering the wet paper RP0 on themesh belt 105 is set at a magnitude so as not to destroy the wet paper RP0 of high water content, and in the illustrated preferred embodiment, the preliminary squeezing force is determined so that the water content of the wet paper RP0 on themesh belt 105 after preliminary dewatering process may be in a range of 80 to 75%. - The final
dewatering roll unit 96B is for obtaining a dry paper specified water content (recycled paper) RP by further squeezing and dewatering the wet paper RP0 on themesh belt 105 after preliminary dewatering by the preliminarydewatering roll unit 96A, and specifically includes at least one set of a final squeezingroll pair 127 consisting of a final dewatering roll 125 rolling on themesh belt 105 from the lower side, and a final press roll 126 rolling and pressing on thesmooth surface belt 145 from the upper side in cooperation with the final dewatering roll 125. - By the final squeezing
roll pair 127 consisting of the final dewatering roll 125 and the final press roll 126, themesh belt 105 and thesmooth surface belt 145 are rolled and squeezed from both upper and lower sides at a specified final pressure in a compressed state, and the water content in the wet paper RP0 on themesh belt 105 is finally removed, and a dry paper of specified water content, that is, recycled paper RP is obtained. - In this case, the final pressure, that is, the final squeezing force of the
final dewatering roll 96B for finally squeezing and dewatering the wet paper RP0 on themesh belt 105 is set to such a magnitude for obtaining a specified dewatering effect securely about the preliminarily dewatered wet paper RP0, and in the illustrated preferred embodiment; it is set so that the water content of the dry paper (recycled paper) RP on themesh belt 105 after the final dewatering process may be in a range of 70 to 65%. - These rolls 120, 121, 125, 126 in the
dewatering roll unit 96 are not specifically shown, but as being driven and coupled to thesingle drive motor 106 by driving and coupling means of gear mechanism, all rolls 120, 121,125,126 are rotated and driven in mutual interaction. - In this case, these rolls 120, 121,125,126 are rotated and controlled so as to roll and contact mutually at a slight rotating speed difference mutually on the outer circumferential surfaces of the upper and lower rolls 120, 125 and the outer circumferential surfaces of 121, 126, on the contact surfaces (the lower side of the
mesh belt 105 and the upper side of the smooth surface belt 145) of themesh belt 105 and thesmooth surface belt 145 rolled and squeezed in a compressed state between the outer circumferential surfaces. - Specifically, the rotating speed of the upper side preliminary and final press rolls 121, 126 is set slightly larger than the rotating speed of the lower side preliminary and final dewatering rolls 120, 125, and therefore the running speed of the
smooth surface belt 145 is set slightly larger than the running speed of themesh belt 105. In such configuration, as described below, when the wet paper RP0 squeezed and dewatered by thedewatering roll unit 96 is transferred and conveyed to the lower side of the upper sidesmooth surface belt 145 from the upper side of the lowerside mesh belt 105, a tension is applied to the wet paper RP0, and wrinkling of the wet paper RP0 is effectively prevented. - The angle defining roll unit (angle defining means) 96C is for assisting the squeezing and dewatering action of the preliminary
dewatering roll unit 96A and the finaldewatering roll unit 96B to be effective, and it is provided at the upstream side of the preliminarydewatering roll unit 96A, and defines the inclination angle between themesh belt 105 and thesmooth surface belt 145 inserted in the preliminarydewatering roll unit 96A. - The angle defining
roll unit 96C is specifically for defining the inclination angle between themesh belt 105 and thesmooth surface belt 145 inserted in the preliminarydewatering roll unit 96A, and more specifically it includes a meshbelt guide roll 130 rolling on themesh belt 105 from the lower side, and defining the insertion angle of themesh belt 105 in the preliminarydewatering roll unit 96A, and a smooth surfacebelt guide roll 131 rolling on thesmooth surface belt 145 from the upper side, and defining the insertion angle of thesmooth surface belt 145 in the preliminarydewatering roll unit 96A. - By the mesh
belt guide roll 130, the insertion angle of themesh belt 105 in the preliminarydewatering roll unit 96A is defined, and by the smooth surfacebelt guide roll 131, the insertion angle of thesmooth surface belt 145 in the preliminarydewatering roll unit 96A is defined, and therefore the inclination angle between themesh belt 105 and thesmooth surface belt 145 is indirectly determined in a specified range. - The inclination angle of the
mesh belt 105 and thesmooth surface belt 145 is determined so as to prevent effectively the wet paper RP0 from returning to slurry by re-absorption of a large volume of squeezed water into the wet paper RP0 after the water contained in the wet paper RP0 is once squeezed substantially to the upstream side of the preliminarydewatering roll unit 96A by the preliminary dewatering action by the preliminarydewatering roll unit 96A. - That is, by the preliminary dewatering roll 120 and the preliminary press roll 121 of the preliminary
dewatering roll unit 96A, when themesh belt 105 and thesmooth surface belt 145 on which the wet paper RP0 is mounted at the upper side are squeezed and rolled from the upper and lower sides in a compressed state, the water content in the wet paper RP0 is squeezed out to the upstream side of the both rolls 120, 121. - In this case, if the inclination angle α between the
mesh belt 105 and thesmooth surface belt 145 is too large, at a position near the upstream side of the both rolls 120, 121, the upper sidesmooth surface belt 145 is apart from the wet paper RP0 on the lowerside mesh belt 105, and hence a part of the abundant squeezed water contained in the wet paper RP0 may be absorbed again in the wet paper RP0, and the wet paper RP0 may become slurry again. - By contrast, when the inclination angle α between the
mesh belt 105 and thesmooth surface belt 145 is small, at a position near the upstream side of the both rolls 120, 121, the upper sidesmooth surface belt 145 is pressed to the wet paper RP0 on the lowerside mesh belt 105, and hence all of the water squeezed from the wet paper RP0 drops to the lower side by way of themesh belt 105, and is not absorbed again in the wet paper RP0, and the wet paper RP0 may be prevented from becoming slurry again. - The inclination angle α between the
mesh belt 105 and thesmooth surface belt 145 is preferably set in a range of 1 to 20 degrees as a result of various tests, preferably 3 to 7 degrees, and it is set at 5 degrees in the illustrated preferred embodiment. - Thus, by driving of the
drive motor 106, the rolls 120, 121, 125, 126 of the preliminarydewatering roll unit 96A and the finaldewatering roll unit 96B in thedewatering roll unit 96 are put in rotation, and first by the preliminary squeezingroll pair 122 in the preliminarydewatering roll unit 96A, themesh belt 105 and thesmooth surface belt 145 are rolled and squeezed from both upper and lower sides in a compressed state at a specified preliminary pressure, and the water contained in the wet paper RP0 on themesh belt 105 is preliminarily removed (in the illustrated preferred embodiment, the water content in the wet paper RP0 is reduced from 90 to 85% to 80 to 75%). - In succession, by the final squeezing
roll pair 127 in the finaldewatering roll unit 96B, themesh belt 105 and thesmooth surface belt 145 are rolled and squeezed from both upper and lower sides in a compressed state at a specified final pressure, and the water contained in the wet paper RP0 on themesh belt 105 is finally removed, and the dry paper of specified water content, that is, the recycled paper RP is obtained (in the illustrated preferred embodiment, the wet paper RP0 of water content of 80 to 75% is dewatered to the dry paper RP of water content of 70 to 65%). In this series of process, the white water W squeezed and dewatered from the wet paper RP0 is collected in the whitewater collection tank 45 in thewater feed device 27. - The wet paper RP0 squeezed and dewatered by the
dewatering roll unit 96 is transferred and conveyed to the lower side of the upper sidesmooth surface belt 145 from the upper side of the lowerside mesh belt 105, at a downstream side location of thedewatering roll unit 96, and is conveyed together with thesmooth surface belt 145, and is dried by the dryingbelt conveyor unit 97 in the drying process. - This transfer action is considered to be caused by a smooth surface structure of the
smooth surface belt 145. That is, the surface of the lowerside mesh belt 105 is a fine rough surface having multiple fine continuous pores, whereas the surface of the upper sidesmooth surface belt 145 is a smooth surface without pores, and hence the dry paper RP0 slightly containing water seems to be adsorbed by the surface tension against the surface of thesmooth surface belt 145. - The drying
belt conveyor unit 97 is a location for manufacturing the recycled paper RP by further heating and drying the dry paper RP squeezed and dewatered in thedewatering roll unit 96, and is mainly composed of a dryingconveyor 170, a heating anddrying unit 171, and the recycled paper smoothing processing unit (recycled paper smoothing device, recycled paper smoothing processing means) 10. - The drying
conveyor 170 is for smoothing and conveying the wet paper RP0 squeezed and dewatered in thedewatering roll unit 96, and mainly includes thesmooth surface belt 145, and thedrive moor 106 for driving and moving thissmooth surface belt 145. - The
smooth surface belt 145 is to convey the wet paper RP0 while heating and drying, and is specifically an endless belt connected and formed in an annular shape of a specified length of a plate material of smooth surface structure having a specified width. The plate material of smooth surface structure is finished in an appropriate smooth surface at one side of the surface of the wet paper RP0, and is made of a material capable of withstanding the heating action of the heating anddrying unit 171 described below, and preferably an elastic heat resistant material is used such as fluorine resin or stainless steel, and a fluorine resin belt is used in the illustrated preferred embodiment. - This
smooth surface belt 145 is, as shown inFig. 1 , rotatably supported and held by way of adrive roller 176, a drivenroller 177, thedewatering roll unit 96, and a drivenroller 178, and is driven and coupled to thedrive motor 106 by way of thedrive roller 176. - The
drive motor 106 for driving and moving thesmooth surface belt 145 is commonly used as the running and driving source of the paper makingnet conveyor 100 and thedewatering roll unit 96, and also a coveringbelt 200 mentioned below. - The heating and
drying unit 171 is a location for heating and drying the wet paper RP0 on thesmooth surface belt 145 and the coveringbelt 200 of the recycled paper smoothingprocessing unit 10, and specifically thesmooth surface belt 145 conveying and supporting the lower side of the wet paper RP0 is heated from the lower side by aheater plate 180 disposed in the midst of its running route. - This
heater plate 180 in the illustrated preferred embodiment is specifically formed as a heater plate sliding and contacting with the opposite side of the conveying and supporting side of the wet paper RP0 on thesmooth surface belt 145, and is provided in the horizontal running portion of the running route of thesmooth surface belt 145, and is disposed to slide and contact with the opposite side of the upper side of the holding side of the wet paper RP0 on thesmooth surface belt 145, that is, the lower side. Hence, the wet paper RP0 on thesmooth surface belt 145 is indirectly heated and dried by way of thesmooth surface belt 145 heated by theheater plate 180. - The recycled paper smoothing processing unit (recycled paper smoothing device, recycled paper smoothing processing means) 10 is formed as pressing means for pressing the entire wet paper RP0 conveyed on the
smooth surface belt 145 of the dryingconveyor 170 with a uniform pressure from the upper side, in the heating anddrying unit 171. - The recycled paper smoothing
processing unit 10 formed as pressing means specifically includes a coveringbelt conveyor 190, and a plurality of pressingrollers Fig. 1 andFig. 5 . - The covering
belt conveyor 190 runs while covering the entire wet paper RP0 on thesmooth surface belt 145 in an enclosed or sandwiched state together with thesmooth surface belt 145, and a coveringbelt 200 for covering the entire wet paper RP0 from the upper side is disposed to run straightly in a same horizontal direction in an overlapped state with thesmooth surface belt 145. - Specifically, the covering
belt conveyor 190 includes the coveringbelt 200 formed as an endless belt conveying and carrying the wet paper RP0 on thesmooth surface belt 145 in an enclosed or sandwiched state together with thesmooth surface belt 145, and thedrive motor 106 for moving and driving this coveringbelt 200. - The covering
belt 200 is specifically made of a mesh belt of an air permeable mesh structure formed of numerous mesh cells for permeating the steam heated and evaporated from the wet paper RP0. - The plate member of the permeable structure for composing the covering
belt 200 is a material capable of passing and releasing the moisture heated and evaporated from the wet paper RP0 on thesmooth surface belt 145 smoothly to the upper side by way numerous mesh cells, and preferred materials are same as in the case of themesh belt 105 of the paper making unit 4 mentioned above, including polypropylene (PP), polyethylene terephthalate (PET), polyamide (PA) (generally known as Nylon, a registered trademark), stainless steel (SUS), and other corrosion resistant materials, and in the illustrated preferred embodiment, a PET-mademesh belt 200 excellent in heat resistance is used. - The permeable mesh structure of the
mesh belt 200 is preferably a material of fine mesh cells and fine weaving cells, and specifically, the material is selected depending on the desired characteristics of the obtained paper, same as in the case of themesh belt 105 of the paper making unit 4 mentioned above. - For example, the mesh size of the
mesh belt 200 is set larger than that of themesh belt 105 of the paper making unit 4, due to difference in the purpose, and is preferably set at about 12 mesh cells to 40 mesh cells (about four times of the mesh size of the mesh belt 105) , and in the illustrated preferred embodiment, themesh belt 200 of 25 mesh cells is used. - The
mesh belt 200 is not particularly strict in the design conditions as compared with themesh belt 105 forming the core of the paper making unit 4, as far as having appropriate properties, including the heat resistance to withstand the high temperature of heating and drying, and the permeability for passing the steam heated and evaporated from the wet paper RP0, and in the illustrated preferred embodiment, themesh belt 200 is a plain-woven PET-made mesh belt of 25 mesh cells. - The width dimension of the
mesh belt 200 is set to a same width dimension as thesmooth surface belt 145 in order to overlap with thesmooth surface belt 145 and enclose the wet paper RP0 in a sandwich state. - The
mesh belt 200 is suspended and supported rotatably by way of adrive roller 205, a drivenroller 206, and pressingrollers Fig. 1 andFig. 5 , and is driven and coupled to thedrive motor 106 by way of thedrive roller 205. - The covering range of the
mesh belt 200 on the wet paper RP0 (recycled paper RP) is set opposite to theheater plate 180 in a horizontal running portion in the running route of thesmooth surface belt 145. - The
pressing rollers mesh belt 200 from the upper side, and are arranged in plural parallel rows at specific intervals in the running direction of the coveringbelt 200 in the covering range of the coveringbelt 200 on the wet paper RP0 (recycled paper RP) , and therefore the coveringbelt 200 presses the wet paper RP0 on thesmooth surface belt 145 with a uniform pressure in the overall length of the covering range, and the wet paper RP0 (recycled paper RP) is not warped or wrinkled, and it is configured to finish the opposite side of the surface of the one side of the wet paper RP0 (recycled paper RP) contacting with the surface of thesmooth surface belt 145 to an appropriate smooth surface. - These
pressing rollers pressing rollers belt 200 and the upper side of thesmooth surface belt 145. - The
pressing rollers belt 200, and are rotatably supported on an apparatus machine body 54 (a specific supporting structure is not shown). - The number of the
pressing rollers - In the heating and
drying unit 171 of the dryingbelt conveyor unit 97, the lower side of the wet paper RP0 is conveyed and supported by thesmooth surface belt 145, and its upper side is covered, conveyed and supported by themesh belt 200, and the plurality of pressingrollers mesh belt 200 from the upper side with a uniform pressure. - As a result, by the both
belts heater plate 180 can be effectively prevented, and by an adequate permeability of themesh belt 200 of the upper side, the whole surface of the wet paper RP0 can be uniformly dried, so that the wet paper RP0 is reborn as a recycled paper (dry paper) RP of a smooth surface on the whole. - The running speed of the
mesh belt 200 is controlled in synchronism with the running speed of thesmooth surface belt 145 of the dryingconveyor 170 in the drying process unit, and a recycled paper of smooth and desired paper quality is obtained. - If the running speed of the
mesh belt 200 of the upper side is not synchronized with the conveying speed of thesmooth surface belt 145 at the lower side, the wet paper RP0 (or dry paper (recycled paper RP) ) may be loosened and wrinkled, or may be torn apart, to the contrary, by an excessive tension, and desired smoothing and processing effects are not obtained. To prevent the inconvenience, the running speed of themesh belt 200 must be synchronized with the conveying speed of thesmooth surface belt 145 of thedrying process unit 170. - In the illustrated preferred embodiment, the driving sources of the both
belts common drive motor 106, and the running speeds of the bothbelts - At the downstream side of the heating and
drying unit 171 in thesmooth surface belt 145, a peelingmember 210 is provided, and the dry paper dried and conveyed on thesmooth surface belt 145, that is, the recycled paper RP (water content 10 to 7%) is sequentially peeled from the holding side of thesmooth surface belt 145. - In this relation, at the terminal end position of the running route of the
smooth surface belt 145 at the downstream side of this peelingmember 210, a fixedsize cutter unit 211 is provided, and the recycled paper RP peeled off from thesmooth surface belt 145 is cut to a specified size (an A4 format in the illustrated preferred embodiment), and is discharged from thedischarge port 8 of theapparatus case 6. - The
apparatus control unit 5 is for controlling automatically in mutual cooperation of the actions of the drive parts of thepulp making unit 2, the pulpconcentration adjustment unit 3, and the paper making unit 4, and is specifically composed of a microcomputer including a CPU, ROMs, RAMs, and I/O ports. - This
apparatus control unit 5 incorporates programs for executing the pulp making process of thepulp making unit 2, the concentration adjusting process of theconcentration adjustment unit 3, and the paper making process of the paper making unit 4, by interacting with each other, and also stores various items of information necessary for driving of the components 2 (20, 21), 3 (3A, 3B), and 4 (95, 96, 97, 10), for example, the driving time and rotating speed of the agitatingdevice 26 in the maceratingunit 20, the water feed timing and water feed amount of thewater feed device 27, the driving time and circulation amount of thecirculation pump 69 in thebeating unit 21, the driving time and rotating speed of thegrinder 50, the adjusting timing and beating gap G adjusting amount of the gap adjusting means 57, the running speed of theconveyors drying unit 171, and the operation timing of the fixedsize cutter unit 211, preliminarily as data, or from the keyboard as appropriate selective input data. - In the
apparatus control unit 5, as mentioned above, theweight sensors drive units apparatus control unit 5 controls thesedrive units - The used
paper recycling apparatus 1 having such configuration is started when the power source is turned on, and the components 2 (20, 21), 3 (3A, 3B), and 4 (95, 10, 96) are controlled automatically by theapparatus control unit 5 in mutual interaction, and the used paper UP, UP, ... charged in the inlet 7 of theapparatus case 6 are macerated and beaten by the maceratingunit 20 and thebeating unit 21 in thepulp making unit 2, and the used paper pulp UPP is manufactured, and further a pulp suspension PS of a paper making concentration is manufactured in the pulpconcentration adjusting unit 3, and this pulp suspension PS is manufactured in the paper makingbelt conveyor unit 95, thedewatering roll unit 96, and the dryingbelt conveyor unit 97 of the paper making unit 4, and recycled paper RP is obtained, which is discharged into the recycled paper receiving tray 9 from thedischarge port 8 of theapparatus case 6. - In this case, the recycled paper smoothing
processing unit 10 in the dryingbelt conveyor unit 97 of the paper making unit 4 formed as pressing means for pressing the entire wet paper RP0 (recycled paper RP) conveyed on the smooth surface belt 146 with a uniform pressure from the upper side in the heating anddrying unit 171, and this pressing means 10 includes a coveringbelt conveyor 190 having a coveringbelt 200 running while covering the entire wet paper RP0 (recycled paper RP) on thesmooth surface belt 145 by carrying together with thesmooth surface belt 145, and a plurality of pressingrollers belt 200 for pressing this coveringbelt 200 from the upper side, and therefore in a very narrow used paper processing space of the usedpaper recycling apparatus 1 of furniture size to be installed not only in a large office but also in a small shop or a general household room, the wet paper RP0 manufactured on the paper makingnet conveyor 100 in the paper making process unit can be securely reproduced as a wrinkle-free and smooth recycled paper RP. - That is, the wet paper RP0 manufactured in the paper making belt conveyor unit (the paper making process unit) 95 is conveyed, heated and dried by the
smooth surface belt 145 in the heating anddrying unit 171 of the next drying belt conveyor unit (the drying process unit) 97, and the entire wet paper is pressed with a uniform pressure from the upper side by the recycled paper smoothing processing unit (the recycled paper smoothing device, recycled paper smoothing processing means) 10 formed as pressing means. - In this case, the recycled paper smoothing
processing unit 10 includes a coveringbelt conveyor 191 having a coveringbelt 200 running while covering the entire wet paper RP0 (recycled paper RP) on thesmooth surface belt 145 by carrying together with thesmooth surface belt 145, and a plurality of pressingrollers belt 200 for pressing this coveringbelt 200 from the upper side, and therefore the wet paper RP0 (recycled paper RP) on thesmooth surface belt 145 for conveying and passing the heating anddrying unit 171 is covered by the coveringbelt conveyor 190 from the upper side, and is pressed by the plurality of pressingrollers - In other words, the wet paper RP0 (recycled paper RP) is heated and dried while being held in a flat state by the sandwich structure at a specified pressure, and wrinkles and warps formed in the wet paper RP0 in the preceding process of the paper making process can be effectively eliminated and removed, and occurrence of wrinkle or warp of the wet paper RP0 (recycled paper RP) by the heating and drying action can be effectively prevented, and a recycled paper of a smooth surface on the whole can be obtained.
- Moreover, since the covering
belt 200 of the coveringbelt conveyor 190 is formed as a mesh belt composed of numerous mesh cells capable of passing and releasing the moisture heated and evaporated from the wet paper RP0 on thesmooth surface belt 145 to the upper side, in site of the presence of the coveringbelt 200, the steam generated by heating of the wet paper RP0 can be effectively lifted and dissipated, and the drying process is promoted smoothly. - Besides, since the running speed of the mesh belt for composing the covering
belt 200 is controlled in synchronism with the running speed of thesmooth surface belt 145 in the drying process unit, the wet paper RP0 is heated and dried while being held in the sandwich structure stably. - The foregoing preferred embodiment may be modified in design as described below.
- For example, the specific configuration of the recycled paper smoothing processing unit (the recycled paper smoothing device, recycled paper smoothing processing means) 10 may not be limited to the configuration of the illustrated preferred embodiment, but may be formed in other configuration having similar functions.
- In the illustrated preferred embodiment, for instance, the
drive motor 106 for moving and driving thesmooth surface belt 145 is also used as the moving and driving source of the coveringbelt 200, and hence the running speeds of the twobelts belts apparatus control unit 5. - As the present invention may be embodied in several forms without departing from the spirit of essential characteristics thereof, the present embodiment is therefore illustrative and not restrictive, since the scope of the invention is defined by the appended claims rather than by the description preceding them, and all changes that fall within metes and bounds of the claims, or equivalence of such metes and bounds thereof are therefore intended to be embraced by the claims.
Claims (11)
- A paper making device (4) for a furniture-sized used paper recycling apparatus (1), which is adapted to manufacture recycled paper from used paper pulp manufactured in a pulp making device (2) situated within the used paper recycling apparatus (1); the said paper making device (4) comprising:a paper making belt conveyor unit (95) for manufacturing wet paper from a slurry-like pulp suspension comprising water and used paper pulp that has been produced by the pulp making device (2); anda drying belt conveyor unit (97) for manufacturing recycled paper by drying the wet paper produced in the paper making belt conveyor unit (95);wherein the paper making belt conveyor unit (95) comprises a mesh belt (105);the drying belt conveyor unit (97) includes a smooth surface drying belt (145), a recycled paper smoothing processing unit (10) for processing and discharging the paper made and formed in the a drying belt conveyor unit (97) as smooth recycled paper, and a heating and drying unit (171); andthe recycled paper smoothing processing unit (10) comprises pressing means (191) for pressing the wet paper conveyed on the drying belt (145) with a uniform pressure from the upper side whilst the paper is in the heating and drying unit (171), which pressing means comprises a plurality of pressing rollers (191) disposed at predetermined intervals in the running direction of the drying belt (145);characterised in that the recycled paper smoothing pressing unit (10) comprises a covering belt (200) and the pressing rollers (191) are adapted to press the covering belt (200) against the drying belt (145).
- A paper making device according to claim 1,
wherein the covering belt (200) is formed as an endless belt running while covering the entire wet paper on the drying belt (145) in a state enclosed together with the drying belt (145), and a drive motor (106) is provided for moving and driving the covering belt (200). - A paper making device according to claim 1 or 2,
wherein the covering belt (200) is formed of a mesh belt having numerous mesh cells for passing and releasing the moisture heated and evaporated from the wet paper on the drying belt (145) to the upper side. - A paper making device according to any preceding claim,
wherein the mesh of the mesh belt of the covering belt is set at 12 to 40 mesh cells. - A paper making device according to any preceding claim,
wherein the running speed of the covering belt (200) is controlled to be synchronized with the running speed of the drying belt (145). - A paper making device according to any preceding claim,
wherein the configuration of the pressing rollers (191) is determined so as to form a flat smoothing action surfaces for smoothing and processing the entire wet paper, in cooperation between the lower side of the covering belt (200) and the upper side of the drying belt (145). - A paper making device according to claim 6,
wherein the pressing rollers (191) are formed as solid metal rollers having an outside diameter capable of maintaining the said predetermined interval for forming and maintaining the smoothing action surface of the covering belt (200), and are supported rotatably. - A paper making device according to any preceding claim,
wherein in the drying process unit, the drying belt (145) for conveying and supporting the lower side of the wet paper is heated by a heater from the lower <side. - A paper making device according to claim 8,
wherein the heater is formed as a heater plate (180) sliding on the opposite side to the conveying and supporting side of the drying belt (145), and the wet paper on the drying belt (145) is heated indirectly and dried by the drying belt (145) heated by the heater plate (180). - A paper making device according to claim 1.
wherein the said paper making device (4) further comprises a dewatering roll unit (96) for squeezing and dewatering the wet paper at an interface between the paper making belt conveyor unit (95) and the drying belt conveyor unit (97). - A used paper recycling, apparatus (1) comprising, in an apparatus case of furniture size, a pulp making device (2) for manufacturing used paper pulp by macerating and beating used paper, a paper making device (4) for manufacturing recycled paper from the used paper pulp manufactured in the pulp making device (2), and a control unit (5) for driving and controlling the pulp making device (2) and the paper making device (2) in cooperation,
wherein the paper making device (4) is as set out in any preceding claim.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009180237A JP5479806B2 (en) | 2009-08-01 | 2009-08-01 | Recycled paper smoothing apparatus, paper making apparatus and used paper recycling apparatus for used paper recycling apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2287397A1 EP2287397A1 (en) | 2011-02-23 |
EP2287397B1 true EP2287397B1 (en) | 2012-06-27 |
Family
ID=43425893
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10250985A Not-in-force EP2287397B1 (en) | 2009-08-01 | 2010-05-27 | Regenerated paper smoothing device of used paper recycling apparatus, paper making device, and used paper recycling apparatus |
Country Status (6)
Country | Link |
---|---|
US (1) | US20110024070A1 (en) |
EP (1) | EP2287397B1 (en) |
JP (1) | JP5479806B2 (en) |
KR (1) | KR20110013210A (en) |
CN (1) | CN101988275A (en) |
ES (1) | ES2390044T3 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2013007137A (en) * | 2011-06-26 | 2013-01-10 | Seed Co Ltd | Recycled paper smoothing device and paper device of waste paper recycling apparatus, and waste paper recycling apparatus |
CN103422385B (en) * | 2012-05-30 | 2015-10-28 | 上海理工大学 | Office and domestic use regeneration paper machine |
FI125522B (en) * | 2014-04-15 | 2015-11-13 | Spinnova Oy | Method and apparatus for making a fiber yarn |
CN104480762B (en) * | 2014-11-24 | 2016-04-13 | 浙江大学 | Paper scrap is utilized to make electric-machine directly-driven shredder and the method thereof of toilet paper |
CN105332314B (en) * | 2015-10-28 | 2017-05-24 | 浙江丽康鞋材有限公司 | Formula and manufacturing technology of shoe midsole |
JP6860979B2 (en) * | 2016-05-11 | 2021-04-21 | デュプロ精工株式会社 | Recycled paper recycling equipment |
CN107587389B (en) * | 2017-10-10 | 2023-08-25 | 泉州中乾机械有限公司 | Control device and control method for pulp molding production equipment |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US6203307B1 (en) * | 1997-08-28 | 2001-03-20 | Champion International Corporation | System for finishing surface of a web of paper having an improved continuous finishing belt |
JP5105271B2 (en) * | 2005-09-22 | 2012-12-26 | 株式会社シード | Waste paper recycling apparatus, pulp manufacturing apparatus, pulp supply apparatus, and dewatering apparatus |
JP5207504B2 (en) * | 2006-05-19 | 2013-06-12 | 株式会社シード | Used paper recycling device and its components |
JP4943874B2 (en) * | 2007-01-28 | 2012-05-30 | 株式会社シード | Paper machine for used paper recycling equipment |
DE102007024581A1 (en) * | 2007-05-25 | 2008-11-27 | Voith Patent Gmbh | Calender, has two paper or cardboard web handling units with two contact surfaces and current paper or cardboard strip under pressure or temperature impact is processed between contact surfaces of each paper or cardboard web handling unit |
JP2009001925A (en) * | 2007-06-19 | 2009-01-08 | Seed:Kk | Papermaking device of waste paper recycling apparatus |
-
2009
- 2009-08-01 JP JP2009180237A patent/JP5479806B2/en not_active Expired - Fee Related
-
2010
- 2010-05-20 US US12/784,469 patent/US20110024070A1/en not_active Abandoned
- 2010-05-27 ES ES10250985T patent/ES2390044T3/en active Active
- 2010-05-27 EP EP10250985A patent/EP2287397B1/en not_active Not-in-force
- 2010-05-31 KR KR1020100051337A patent/KR20110013210A/en not_active Application Discontinuation
- 2010-07-08 CN CN201010227904XA patent/CN101988275A/en active Pending
Also Published As
Publication number | Publication date |
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JP2011032604A (en) | 2011-02-17 |
KR20110013210A (en) | 2011-02-09 |
CN101988275A (en) | 2011-03-23 |
JP5479806B2 (en) | 2014-04-23 |
ES2390044T3 (en) | 2012-11-06 |
US20110024070A1 (en) | 2011-02-03 |
EP2287397A1 (en) | 2011-02-23 |
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