EP3717694B1 - Verfahren und vorrichtung zum behandeln einer faserstoffbahn in einer langnip-presseinheit - Google Patents

Verfahren und vorrichtung zum behandeln einer faserstoffbahn in einer langnip-presseinheit Download PDF

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Publication number
EP3717694B1
EP3717694B1 EP19707727.4A EP19707727A EP3717694B1 EP 3717694 B1 EP3717694 B1 EP 3717694B1 EP 19707727 A EP19707727 A EP 19707727A EP 3717694 B1 EP3717694 B1 EP 3717694B1
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EP
European Patent Office
Prior art keywords
press
transfer
transfer area
roll
area
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19707727.4A
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German (de)
English (en)
French (fr)
Other versions
EP3717694A1 (de
Inventor
Andreas Anzel
Robert Meitner
Paul Richards
Wolfgang Plienegger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Andritz AG
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Andritz AG
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Filing date
Publication date
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Priority to PL19707727T priority Critical patent/PL3717694T3/pl
Publication of EP3717694A1 publication Critical patent/EP3717694A1/de
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Publication of EP3717694B1 publication Critical patent/EP3717694B1/de
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F2/00—Transferring continuous webs from wet ends to press sections
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D21F3/0227—Belts or sleeves therefor
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/04—Arrangements thereof
    • D21F3/045—Arrangements thereof including at least one extended press nip
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/48—Suction apparatus
    • D21F1/52—Suction boxes without rolls
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/006—Making patterned paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/14—Making cellulose wadding, filter or blotting paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • D21F7/12—Drying
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/002—Tissue paper; Absorbent paper
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/24—Arrangements of devices using drying processes not involving heating

Definitions

  • the invention relates to a method for treating a fibrous web in a paper or tissue machine with a long-nip press unit.
  • This long-nip press unit consists of a shoe press roll with a rotating press cover and a counter roll, the fibrous web is dewatered in the extended press nip between the counter roll and the press cover and the fibrous web after the extended press nip on the rotating press cover of the press roll to a transfer covering, which the Fiber web takes over, is guided.
  • the invention also relates to a press arrangement with which the method according to the invention is carried out.
  • the mechanical dewatering can be considerably improved by this upstream pressing step, which is preferably carried out with a long-nip press unit, in particular a shoe press.
  • the effort for thermal drying is reduced, which leads to energy savings.
  • the fibrous web in the press nip of the upstream press step is transferred to an impermeable belt that also runs through the press nip and subsequently guided on this belt to a subsequent drying cylinder (Yankee cylinder).
  • the WO 2016/186 562 A1 discloses a method with the following web routing: transferring the fibrous web to a belt in the press nip of the upstream press step, guiding the fibrous web and the belt to a structured, permeable covering, transferring the fibrous web in a 5 mm - 40 mm long transfer nip in the machine direction between a first transfer roller and a second transfer roller (suction roller) from the belt to the structured, permeable covering, guiding the fibrous web of the structured, permeable covering to a drying cylinder.
  • the one in the EP 1 075 567 B1 as well as in the EP 0 854 229 B1 The methods described each disclose a closed web guide of the fibrous web between sheet formation and drying cylinder (Yankee cylinder).
  • the fibrous web is dewatered in an upstream press nip, the fibrous web being guided by the smooth roller unsupported via a free pull from the smooth roller to an embossing belt.
  • the fibrous web is used for dewatering in a long-nip press unit, such as a shoe press a felt passed through an extended press nip, which is formed by a shoe press roll with a rotating press cover and by a counter roll. After the extended press nip, the felt is separated from the fibrous web as quickly as possible. The fibrous web is then either continued on a covering, which is also passed through the extended press nip, on the jacket of the shoe press roll of the long-nip press unit, or on the counter roll.
  • a long-nip press unit such as a shoe press a felt passed through an extended press nip, which is formed by a shoe press roll with a rotating press cover and by a counter roll.
  • the AT 508 331 B1 discloses, for example, a method in which the fibrous web is dewatered in an extended press nip formed by a shoe press roll and a counter roll and is guided on the rotating press cover of the shoe press roll from the extended press nip to a transfer area in which the fibrous web is transferred from the press cover to a roll or to a transfer covering is passed.
  • the transfer covering wraps around the press cover or the transfer is supported by a suction roll.
  • the disclosed options for removing the fibrous web from a clothing guided through the press nip or from a roller include unsupported removal via a free pull, supported removal via another roller, or supported removal with the aid of a further clothing and a vacuum roller.
  • An unsupported (open) transfer of a fibrous web with a low sheet weight i.e. an oven-dry (oven-dry) sheet weight in the long-nip press unit of less than 50 g / m 2 , usually less than 35 g / m 2 and usually less than 25 g / m 2 , is very problematic because of the low wet strength of the fibrous web and is very prone to breaks and production losses.
  • a fibrous web with a low sheet weight is therefore a supported one (closed) transfer obvious.
  • supported, closed transfers are designed as a press nip between two rollers - one of which can also be vacuumed.
  • the nip length between two rolls is ( WO 2016/186 562 A1 ) in a range greater than / equal to 5 mm - 40 mm.
  • relevant forces are transmitted via relevant effective sounds in the transfer nip (press nip).
  • possibilities are to be found to carry out the transfer in a clearly defined area, which is particularly important at higher relative speeds in the transfer area.
  • the object of the present invention is to disclose a method for the assisted, closed transfer of a fibrous web in a long-nip press unit, in which the fibrous web is transferred from a press jacket in a clearly defined area to a further covering and thus an optimal transfer of the fibrous web without Injuries to the web is enabled.
  • a construction of a press and transfer arrangement for a paper or tissue machine is to be disclosed, which has a compact construction.
  • the fibrous web is guided to a transfer area after the extended press nip on the rotating press cover of the press roll.
  • the rotating press jacket not only fulfills its function as a press element, but also serves as a means for Further transport of the fibrous web after mechanical dewatering.
  • the fibrous web adheres to the flexible press cover after pressing.
  • the fibrous web is transferred from the press cover to a transfer covering in the transfer area. According to the invention, this is done with the aid of a stationary transfer device.
  • a stationary transfer device is understood to mean a non-rotating transfer device.
  • the transfer covering thus picks up the fibrous web in the transfer area, the rear side of the transfer covering being guided over and supported by a stationary transfer device.
  • the fixed transfer device In contrast to the prior art, in which the transfer to the transfer covering is supported by a rotating suction roll, the fixed transfer device enables a very short and precisely defined transfer area to be realized. So far, it has been assumed that for a reliable transfer of the fibrous web to the transfer covering, the transfer area, that is to say the transfer area, must be designed to be as long as possible. However, the inventors have recognized that the shortest possible transfer area can bring considerable advantages. The inventors have also recognized that for a reliable transfer, the transfer area must be precisely defined; this can hardly be achieved by rotating rollers.
  • Reliable rail handover is thus ensured by handover in a clearly defined area.
  • An extended transfer area for example by wrapping the press jacket around the press jacket before or afterwards, should be avoided.
  • the area of the transfer of the fibrous web - ie the Contact length between the press jacket and the transfer cover - take place in a clearly defined area.
  • Permeable machine coverings which can be structured or unstructured, e.g. screens commonly used in paper production, preferably structured dryer fabric coverings, as are customary in TAD (through air drying) applications, can be used as transfer coverings.
  • suction is applied to the transfer device.
  • the stationary transfer device can be designed, for example, as a slot suction device.
  • the running surface of such transfer devices is made of a low-wear and low-friction material - such as ceramic.
  • the running surface of the stationary transfer device guides the transfer clothing to the transfer zone (transfer area), with preferably no lubrication taking place, since this would lead to the transfer clothing being moistened immediately in front of the transfer zone.
  • Permeable transfer coverings offer the advantage that the fibrous web transfer from the press jacket to the transfer covering is supported by the suction of the stationary transfer device and thus by the suction of the fibrous web through the transfer covering.
  • the press cover of the shoe press roll does not form a rigid surface, such as the surface of a roll, it is advantageous to take measures to stabilize the rotating press cover. It is therefore advantageous to place the press cover of the shoe press roll under pneumatic overpressure, the pneumatic overpressure generally being less than 250 mbar, typically ⁇ 100 mbar. This stabilization ensures that the press jacket runs smoothly. This also has a positive effect on the Service life of the press jacket and the concentricity properties of the press jacket.
  • the fibrous web is preferably guided through the extended press nip on a felt.
  • the felt absorbs moisture from the fibrous web in the extended press nip. To avoid re-moistening of the fibrous web, it makes sense if the felt is separated from the fibrous web immediately after the extended press nip.
  • the press jacket is supported by support elements before and after the transfer area on the inside of the press jacket. In this way, the press jacket is additionally stabilized in the transfer area. Bars, for example, can be used as support elements.
  • the contact surface of a support element that is in contact with the inside of the press jacket typically has a curvature that corresponds to the curvature of the jacket surface or also a correspondingly smaller curvature. A hydrostatic and / or hydrodynamic lubrication of the contact surface of the support element to reduce the friction between the press jacket and support element is advantageous.
  • the support elements press between 0 mm and 20 mm radially outward from the press shell of the press roll.
  • the radial pressing out of the support elements against the press cover of the shoe roll improves the stabilization of the circumferential press cover in the area of the transfer zone, which enables an improved transfer of the fibrous web from the press cover to the transfer covering.
  • a radial pushing out of 0 mm means that the support elements are just touching the press jacket, which is under air pressure, and there is no free gap between the support element and press jacket.
  • a radial pushing out of 20 mm radially outwards in this sense means that, starting from a straight contact with the press cover (0 mm position), the support element is moved 20 mm radially outward, the center of the shoe roll forming the reference point.
  • the angle ⁇ between the support element located in front of the transfer area and the transfer area, viewed from the press roll axis, is less than 15 ° and the angle ⁇ between the support element located after the transfer area and the transfer area is less than 30 °.
  • the imaginary line of contact between the support element and the press jacket or, alternatively, the symmetry line of the support element is used for the support elements.
  • the imaginary line of contact between the stationary transfer device and the press cover is used for the transfer area. The press jacket is not supported in the area between the support elements.
  • the upright transfer device and the transfer covering running over it dips radially into the press jacket of the press roll in the transfer area between 0 and 20 mm.
  • Radial immersion of 0 mm means that the upright transfer device and the transfer cover running over it touch the press cover, which is under air pressure, and there is no free gap between the transfer cover and press cover.
  • Radial immersion of 20 mm radially inwards means in this sense that, starting from just touching the press cover (0 mm position), the transfer device is moved 20 mm radially inwards, with the center of the shoe roll (axis of rotation) forming the reference point.
  • the transfer device is immersed in the one under pneumatic pressure Press cover of the shoe roll free, which means that no mechanical support, such as a stop, a shoe or a counter-pressing element, etc., is provided in the transfer area on the side of the press cover opposite the transfer device.
  • no mechanical support such as a stop, a shoe or a counter-pressing element, etc.
  • the radial depth of immersion of the stationary transfer device in the press shell of the press roll is set by a device outside the press roll.
  • the stationary transfer device can be attached to the frame on a rotatable lever arm, with radial immersion in the press shell of the shoe roll being possible, depending on the pivot point of the lever arm - with the choice of the center point of the shoe roll as a reference.
  • the transfer of the fibrous web from the press cover of the shoe roll to the transfer covering takes place within a transfer area of less than 10 mm, preferably within less than 5 mm, ideally along a line.
  • the contact length between the press jacket and the transfer cover is therefore very short compared to the prior art.
  • the length of the transfer area can be assessed using an imprint with a pressure-sensitive film, for example with a Fujifilm (Ultra Extreme Low Pressure 5 LW).
  • the pressure-sensitive film is inserted in the transfer area with the press and transfer arrangement standing. Then the stationary transfer device together with the transfer cover is brought into the operating position against the press jacket, which is under pneumatic pressure.
  • the pressure-sensitive film changes color according to the touch of the components - standing transfer device, transfer cover, Fujifilm and press cover - whereby a coloration indicates contact or the coloration indicates the transfer area represents.
  • the forces present in the transfer area are typically ⁇ 4 kN / m, preferably ⁇ 2 kN / m and ideally ⁇ 1 kN / m.
  • the transfer covering already runs onto the stationary transfer device before the fibrous web is taken over from the press cover of the press roll and is guided through it. This ensures that the transfer covering does not wrap around the press cover of the shoe roll in front of the transfer area. This also ensures that the transfer covering only comes into contact with the fibrous web in the transfer area.
  • the stationary transfer device is designed as a slot suction device, whereby the suction of the transfer covering takes place through the slot between a first and a second suction slot edge, and the slot suction device has a curved area in front of the first inlet-side suction slot edge and the arc length of the curved area up to first suction slot edge is, for example, less than 30 mm, preferably less than 15 mm.
  • the contact of the stationary transfer device with the transfer covering, the fibrous web and the press cover is in particular in the curved area in front of the first inlet-side suction slot edge, so that the transfer area is also in the curved area in front of the first inlet-side suction slot edge.
  • This embodiment allows in particular the clear definition of the transfer area, the transfer area being shorter than 10 mm, preferably shorter than 5 mm, ideally a line.
  • the transfer cover does not touch the press cover until it is in the transfer area, the transfer cover not wrapping the press cover before or afterwards.
  • the angle ⁇ is between that guided over the stationary transfer device into the transfer area Transfer covering and the tangent to the press cover in the transfer area greater than zero degrees, which means that the transfer covering, fibrous web and press cover only come into contact in the transfer area.
  • the angle ⁇ between the transfer cover leading out of the transfer area and the tangent to the press cover in the transfer area is greater than zero degrees, so that the transfer cover does not wrap around the press cover after the transfer area and the transfer cover, fibrous web and press cover only come into contact in the transfer area.
  • the transfer covering moves in the transfer area at a lower relative speed than the press cover; the fibrous web is creped when it is transferred from the press cover to the transfer covering.
  • the fibrous web, together with the transfer covering is guided via a (further) suction device after the transfer from the press cover of the press roll to the transfer covering for further fixation of the fibrous web on the transfer covering.
  • This suction device can be designed, for example, as a suction box or "molding box”. In this fixing step, the structure of the transfer covering is also impressed on the fibrous web.
  • the conditioning of the transfer covering is of particular importance.
  • the transfer covering takes over the fibrous web in the transfer area and then transfers the fibrous web to a drying unit, for example one Drying cylinder or is passed over a TAD (through air drying) drum.
  • a drying unit for example one Drying cylinder or is passed over a TAD (through air drying) drum.
  • the transfer clothing should be conditioned.
  • Vacuum boxes or air knives can be used for the subsequent dewatering of the transfer covering. It is conceivable that a hot fluid, e.g. hot air, hot exhaust air from a drying unit, steam etc. flows through the transfer covering for further dewatering. In order to avoid renewed moistening of the transfer clothing in front of the transfer area after the transfer clothing has been drained, it is possible to dispense with doctor lubrication of the doctored guide rollers for guiding the transfer clothing.
  • an interface control mixture e.g. a release chemical
  • Applying an interface control mixture, e.g. a release chemical, to the surface of the transfer fabric before it passes through the transfer area can be beneficial to the process.
  • the application can take place, for example, through a spray bar which sprays the interface regulation mixture onto the transfer fabric. With this process step, the strength of the surface adhesion of the fibrous web on the transfer fabric can be regulated well.
  • FIG. 1 shows a tissue machine 2 with the press arrangement according to the invention.
  • the pulp suspension is fed to the forming unit via a headbox 22; it emerges from the headbox 22 between a breast roll 24 and a forming roll 23.
  • the breast roll 24 is wrapped in an outer covering 25.
  • the fiber suspension is dewatered to such an extent that a fiber web 1 is formed on the covering 26.
  • the covering 26 is preferably a felt which conveys the fibrous web 1 to a shoe press roll (press roll) 4.
  • the press arrangement according to the invention consists of a long-nip press unit 3, which has a press roller 4 with a rotating press jacket 5 and a counter roller 6. An extended press nip 7 is formed between the press roll 4 and the counter roll 6.
  • the press arrangement according to the invention now works in the following way:
  • the fibrous web 1 is guided on the felt 26 through the extended press nip 7.
  • the felt 26 absorbs moisture from the fibrous web 1.
  • the felt 26 is separated from the fibrous web 1 immediately after the extended press nip 7, so that rewetting of the fibrous web is avoided.
  • the fibrous web 1 After the extended press nip 7, the fibrous web 1 no longer runs on the felt 26 but on the press jacket 5 of the press roll 4.
  • the press jacket 5 transfers the fibrous web 1 to a transfer covering 9 in a transfer area 8.
  • the transfer of fibrous web to the transfer covering 9 is supported by the transfer device 10 with suction.
  • the transfer covering 9 is structured and permeable in the present example.
  • a further web treatment step of the fibrous web 1, namely creping, takes place in the transfer area 8.
  • the surface of the transfer covering 9 moves somewhat more slowly (lower relative speed) through the transfer area 8 than the press cover 5, so the fibrous web 1 is somewhat compressed or creped when it is transferred to the transfer covering 9.
  • thermal drying takes place on a Yankee cylinder 27, from which the dry fibrous web 1 is scraped off with the aid of a scraper, for example.
  • the conditioning of the transfer covering 9 should take place in such a way that there is no or only a very slight moistening of the transfer covering 9 as a result of the conditioning process. Therefore, the conditioning can be done, for example, with compressed air or a compressed air sword be performed. In the case of conditioning with water, it must be ensured that the transfer covering 9 is dried or sucked dry before it takes over the fibrous web 1 again.
  • the fibrous web 1 is fixed on the transfer covering 9 after the transfer of the fibrous web 1 from the press jacket 5 to the transfer covering 9.
  • the fixation can take place by guiding the fibrous web 1 lying on the transfer covering 9 over a vacuum box 14, the vacuum acting on the vacuum box 14 sucking the fibrous web 1 onto the transfer covering 9.
  • Figure 2 shows a detailed view of the transfer area of the fibrous web 1 to the transfer covering 9.
  • the fibrous web 1 lying on the press jacket 5 is transferred to the transfer covering 9 in the transfer area 8.
  • This transfer is supported by the evacuated transfer device 10. It can be seen that the press jacket 5 is not supported in the transfer area 8. This means that no support elements are provided in the transfer area 8 on the side 15 of the press jacket 5 opposite the fibrous web 1.
  • a first support element 12 for the press cover 5 is provided in the press roll 4 in front of the transfer area 8.
  • the angle ⁇ viewed from the press roll axis (press roll center) 19 between the support element 12 located in front of the transfer area 8 and the transfer area 8 is here less than 15 °, for example 6 °.
  • a second support element 13 is provided in the press roll 4, on which the press cover 5 is supported.
  • the angle ⁇ between the support element 13 and the transfer area 8 is less than 30 ° here.
  • the angle ⁇ between the transfer cover 9 guided over the stationary transfer device 10 into the transfer area 8 and the tangent 20 to the press cover 5 in the transfer area 8 greater than zero degrees, as a result of which the transfer covering 9, fibrous web 1 and press cover 5 only come into contact in the transfer area 8.
  • the angle ⁇ between the transfer cover 9 guided out of the transfer area 8 and the tangent 21 to the press cover 5 in the transfer area 8 is greater than zero degrees, so that the transfer cover 9 does not wrap around the press cover 5 after the transfer area 8 and the transfer cover 9 makes contact with the fibrous web 1 and press jacket 5 is only given in the transfer area 8.
  • the radial depth of immersion of the stationary transfer device 10 in the press jacket 5 of the press roll 4 is set by the setting device 11 outside the press roll 4.
  • the stationary transfer device 10 can be attached to the frame on a rotatable lever arm 29, with radial immersion in the press jacket 5 being possible according to the pivot point 30 of the lever arm - with the selection of the center 19 of the press roller 4 as a reference.
  • the adjusting device 11 has an adjusting screw 28 by means of which the immersion depth of the transfer device 10 can be adjusted.
  • the transfer area 8 is off Figure 2 shown in detail.
  • the transfer device 10 is designed as a slot suction device.
  • the suction slit 16 is used to suction the transfer covering 9 between a first 17 and a second suction slit edge 31.
  • the slotted suction device 10 has a curved region 18 in front of the first suction slit edge 17 on the inlet side.
  • the arc length of the curved region 18 up to the first suction slot edge 17 is, for example, smaller 30 mm, preferably less than 15 mm.
  • the contact of the stationary transfer device 10 with the transfer covering 9, the fibrous web 1 and the press cover 5 is here in the curved area 18 in front of the first inlet-side suction slot edge 17, whereby the transfer area 8 is also in the curved area 18 in front of the first inlet-side suction slot edge 17.
  • the suction slot 16 of the transfer device 10 is already outside the transfer area 8, that is, in the area of the suction slot 16, the press jacket 5 is no longer touched by the transfer covering 9.
  • the transfer covering 9 then runs over the run-out area 32 of the transfer device 10.
  • the transfer device 10 is shown.
  • the suction slot 16 is 15 mm wide here.
  • the transfer covering 9 preferably runs onto the transfer device 10 in the curved area 18 in front of the first suction slot edge 17.
  • the curved area 18 is 12 mm long here.
  • FIG Figure 5 shows a further possible embodiment of the transfer device 10.
  • the outlet area 32 of the transfer device is in contrast to FIG Figure 4 running downhill.
  • FIG. 6 shows a Fujifilm imprint 33 (Ultra Extreme Low Pressure 5 LW) of the transfer area 8 of a transfer arrangement designed according to the invention.
  • the transfer device 10 standing and swiveled away, the pressure-sensitive Fujifilm is inserted into the gap between the press jacket 5, which is under pneumatic pressure, and the transfer covering 9. Then the stationary transfer device 10 together with the transfer covering 9 is pivoted in the operating position against the press jacket 5, which is under pneumatic pressure.
  • transfer cover 9, Fujifilm and press cover 5 - the pressure-sensitive film changes color, a discoloration indicating a contact or the discoloration representing the transfer area 8.
  • the shown Fujifilm imprint 33 shows a transfer area 8 with a length of less than 5 mm in the running direction of the fibrous web 1, within which the fibrous web 1 is transferred from the press cover 5 of the press roll 4 to the transfer covering 9.
  • the length of the contact between the transfer covering 1 and the press jacket 5 normal to the running direction (transverse to the machine running direction) of the fibrous web 1 is 900 mm in this case, corresponding to the width of the transfer covering of 900 mm in this case.
  • FIG 7 shows a detail of the Fujifilm imprint 33 (Ultra Extreme Low Pressure 5 LW) of the in Figure 6 holistically represented impression.
  • a scale is shown for better quantification.
  • the scale points in the running direction of the fibrous web 1, the scale unit being [cm]. Since the discoloration represents the transfer area 8, it can be clearly seen that in the shown section of the Fujifilm imprint 33 there is a transfer area 8 with a length of less than 5 mm in the running direction of the fibrous web 1.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)
EP19707727.4A 2018-03-01 2019-02-19 Verfahren und vorrichtung zum behandeln einer faserstoffbahn in einer langnip-presseinheit Active EP3717694B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL19707727T PL3717694T3 (pl) 2018-03-01 2019-02-19 Sposób i urządzenie do obróbki wstęgi materiału włóknistego w zespole prasującym o rozszerzonej strefie docisku

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50177/2018A AT520319B1 (de) 2018-03-01 2018-03-01 Verfahren und vorrichtung zum behandeln einer faserstoffbahn in einer langnip-presseinheit
PCT/EP2019/054041 WO2019166271A1 (de) 2018-03-01 2019-02-19 Verfahren und vorrichtung zum behandeln einer faserstoffbahn in einer langnip-presseinheit

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EP3717694A1 EP3717694A1 (de) 2020-10-07
EP3717694B1 true EP3717694B1 (de) 2021-06-23

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EP19707727.4A Active EP3717694B1 (de) 2018-03-01 2019-02-19 Verfahren und vorrichtung zum behandeln einer faserstoffbahn in einer langnip-presseinheit

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AT522784B1 (de) * 2020-02-25 2021-02-15 Andritz Ag Maschf Vorrichtung und verfahren zum herstellen einer faserstoffbahn
CN115235215A (zh) * 2021-02-10 2022-10-25 王婧怡 一种纺织布干燥设备

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3815278A1 (de) * 1988-05-05 1989-11-16 Voith Gmbh J M Pressenpartie einer maschine zur herstellung einer faserstoffbahn, insbesondere papierbahn
US5171389A (en) * 1991-11-08 1992-12-15 Albany International Corp. Spiral construction of grooved long nip press
US5741402A (en) * 1996-09-03 1998-04-21 The Procter & Gamble Company Vacuum apparatus having plurality of vacuum sections for controlling the rate of application of vacuum pressure in a through air drying papermaking process
DE19654198A1 (de) 1996-12-23 1998-06-25 Voith Sulzer Papiermasch Gmbh Maschine zur Herstellung einer Faserstoffbahn
DE19744341A1 (de) * 1997-10-07 1999-04-15 Voith Sulzer Papiertech Patent Papiermaschine
SE511702C2 (sv) 1998-03-20 1999-11-08 Valmet Karlstad Ab Pappersmaskin och sätt för framställning av mjukpapper
FI104644B (fi) * 1998-08-17 2000-03-15 Valmet Corp Menetelmä ja laite paperikoneella rainan siirtämiseksi formeriosalta puristinosalle
DE10157451A1 (de) 2001-11-23 2003-06-05 Voith Paper Patent Gmbh Verfahren und Vorrichtung zur Herstellung einer Faserstoffbahn
DE10233920A1 (de) 2002-07-25 2004-02-12 Voith Paper Patent Gmbh Schuhpresse
US7585395B2 (en) * 2004-01-30 2009-09-08 Voith Patent Gmbh Structured forming fabric
DE102008043997A1 (de) * 2008-11-24 2010-05-27 Voith Patent Gmbh Maschine zur Herstellung und/oder Behandlung einer Faserstoffbahn
AT508331B1 (de) 2009-05-19 2011-05-15 Andritz Ag Maschf Verfahren und vorrichtung zur behandlung einer faserstoffbahn in einer langnip-presseinheit
SE536202C2 (sv) * 2011-07-12 2013-06-25 Metso Paper Sweden Ab Förfarande och maskin för tillverkning av en strukturerad fiberbana av papper
SE540011C2 (en) 2015-05-19 2018-02-27 Valmet Oy A method of making a structured fibrous web and a creped fibrous web
AT518060B1 (de) * 2016-07-07 2017-07-15 Klaus Ing Bartelmuss Vorrichtung zur Reinigung eines Filzbandes in einer Anlage zur Herstellung eines Papierbandes

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MX2020008840A (es) 2020-10-05
EP3717694A1 (de) 2020-10-07
WO2019166271A1 (de) 2019-09-06
ES2883776T3 (es) 2021-12-09
CA3091525A1 (en) 2019-09-06
BR112020013630A2 (pt) 2021-01-12
PL3717694T3 (pl) 2021-11-15
US11414816B2 (en) 2022-08-16
CN111868327A (zh) 2020-10-30
CN111868327B (zh) 2022-11-04
CA3091525C (en) 2023-09-12
AT520319A4 (de) 2019-03-15
AT520319B1 (de) 2019-03-15
US20210087746A1 (en) 2021-03-25

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