EP1778915B1 - Dispositif de stabilisation de bande - Google Patents

Dispositif de stabilisation de bande Download PDF

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Publication number
EP1778915B1
EP1778915B1 EP05761171A EP05761171A EP1778915B1 EP 1778915 B1 EP1778915 B1 EP 1778915B1 EP 05761171 A EP05761171 A EP 05761171A EP 05761171 A EP05761171 A EP 05761171A EP 1778915 B1 EP1778915 B1 EP 1778915B1
Authority
EP
European Patent Office
Prior art keywords
fabric
transfer apparatus
underside
pressure zone
negative pressure
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.)
Not-in-force
Application number
EP05761171A
Other languages
German (de)
English (en)
Other versions
EP1778915A1 (fr
Inventor
Thomas Scherb
Luiz Carlos Silva
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.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1778915A1 publication Critical patent/EP1778915A1/fr
Application granted granted Critical
Publication of EP1778915B1 publication Critical patent/EP1778915B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/10—Advancing webs by a feed band against which web is held by fluid pressure, e.g. suction or air blast
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/08—Web-winding mechanisms
    • B65H18/26—Mechanisms for controlling contact pressure on winding-web package, e.g. for regulating the quantity of air between web layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
    • B65H19/2207—Changing the web roll in winding mechanisms or in connection with winding operations the web roll being driven by a winding mechanism of the centre or core drive type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/31—Suction box; Suction chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/32—Suction belts

Definitions

  • This invention relates to a transfer device with a device for stabilizing the transport of a material web guided on the upper side of a clothing, in particular a fibrous web, according to the preamble of patent claim 1.
  • the document DE19613939 A1 describes a device for stabilizing a paper web in a paper machine in the region of a roller, to which the paper web is guided on a belt, with a front of the roller along the belt extending box whose interior is open to the paper web and in which a negative pressure is generated for sucking the paper web to the tape.
  • a pressure zone can follow the negative pressure zone, which supports the transfer of the paper web to the roll.
  • the document EP1205415 A2 relates to a vacuum belt conveyor apparatus having an air-permeable, endless belt which is guided by a first roller arranged at the upstream end of the conveyor device and a second roller arranged at the downstream end of the conveyor device.
  • the endless belt has a transporting run that runs from the first to the second roll and a returning run that runs from the second to the first roll.
  • the transporting Trumm is in contact with a plate with openings, which are connectable to a vacuum source.
  • the document US4893741 refers to an air duct for stabilizing a running web, such.
  • the transfer device with a device for transport stabilization of a run on the top of an air-permeable fabric web-like material, in particular a fibrous web.
  • the device is arranged on the underside of the clothing and in the web running direction immediately before an inlet gap formed by a roller and the clothing and has a first vacuum zone and at least one pointing substantially against the web running direction and communicating with the first vacuum zone of the device suction opening.
  • the air boundary layer entrained from the underside of the clothing is at least partially drawn from the clothing directly through the suction opening into the first vacuum zone.
  • a suction opening is provided, which extends in the transverse direction, in particular substantially over the air-permeable width of the fabric.
  • a guide element which is arranged in such a way that the air boundary layer entrained from the underside of the clothing is at least partially guided by the clothing to the suction opening.
  • the guide element is arranged in the web running direction in front of the first vacuum zone.
  • the guide element preferably has a guide surface.
  • the guide surface of the guide element has at one end against the web running obliquely in the direction of the underside of the fabric and the other end in the direction of the facing against the web running suction port. This makes it particularly effective possible to peel off the air boundary layer of the fabric and supply the suction port.
  • the routing of the air boundary layer is further optimized by the fact that in the direction of the underside of the fabric facing end of the guide surface is located in the immediate vicinity of the underside of the fabric, so that the distance between the end and the underside of the fabric is as low as possible and thus only a small Part of the air boundary layer in the gap between the fabric and the end "escape" can.
  • the guide element To improve the mode of action of the guide element also contributes, when the guide element in the region of the underside of the fabric facing end of the guide surface is pointed in its cross-section tapered tapering for covering. As a result, the "peeled-off" air boundary layer can be led away from the clothing as swirl-free as possible and without pressure build-up.
  • the guide element extends in the transverse direction of the fabric, in particular substantially over the air-permeable width of the fabric.
  • the guide element is inexpensive as a guide plate, for example. By a forming process or the like. Produced.
  • the device has at least one suction opening pointing substantially counter to the web running direction and communicating with the first vacuum zone of the device.
  • the suction opening in this case, is arranged in the web running direction behind the guide element and points against the web running direction in the direction of flow of the "peeled" air layer, so that the "peeled off” of the guide element air boundary layer can pass directly through the suction port into the first vacuum zone.
  • the device In order to prevent a new air boundary layer builds up after an air boundary layer has been peeled off by the interaction of the guide element and the first vacuum zone from the underside of the fabric, it may be useful if the device at least one pointing substantially in the direction of the underside of the fabric and with Having the first negative pressure zone of the device communicating suction port.
  • the pointing to the underside of the fabric suction opening is in this case arranged in the web running direction behind the guide element.
  • the second vacuum zone is evacuated by a suction device independent of the first vacuum zone, or else that the first and second negative pressure zones are evacuated by a common suction device.
  • first vacuum zone may extend to the inlet gap.
  • first and the second negative pressure zone coincide.
  • a further embodiment of the invention provides that a doctor blade acting on the roller is arranged directly in front of the inlet gap in such a way that Roller entrained air boundary layer is led away from the roller.
  • a web lifting is prevented particularly effectively if the first and / or the second vacuum zone is formed in the region between the inlet gap, doctor blade and the device.
  • the device according to the invention can be used wherever the danger of web lift caused by air boundary layer overpressure in the region of the inlet gap. This is especially at high web speeds (eg more than 800 meters / min or especially more than 1100 meters / min) or long free transport distances of the fabric without support by a roller (here can build on the long free transport route an air boundary layer) or at Use of voluminous and / or structured coverings such as tapes or embossing tapes or felts or embossing felts or membranes, in particular Spectra membrane or TAD (through-air dryer) tapes or when transporting thin and light fibrous webs such as tissue webs.
  • TAD through-air dryer
  • the device according to the invention is therefore preferably used in a transfer device which, for example, is arranged between a drying device, in particular a Yankee drying cylinder, and a take-up device of a paper machine, in particular a tissue machine.
  • FIG. 1 shows a part of a tissue machine 1 in side view.
  • the illustrated part shows a section of a Yankoe drying cylinder 2 of a drying device, a winding device 3, a spool 4 and a roller formed as a winding drum 5, and a transfer device 6, pulleys 7, 8, 9, the winding drum 5, as a TAD Sieve 10 formed fabric and the inventive device for transport stabilization 11 comprising.
  • a tissue paper web 12 is removed from the Yankee drying cylinder 2 by means of a creping doctor 13.
  • the thus creped tissue paper web 12 is then transferred by means of a suction box 16 to the TAD screen 10 and transported on the top 14 of the TAD sieve 10 to the winding device 3, then conveyed by a formed between the spool 4 and the winding drum 5 gap 35 and finally wound up on the reel 4.
  • the device 11 has, in the present embodiment, a first suction box 15, a second suction box 29 and a third suction box 30.
  • the first suction box 15 is arranged in the web running direction 17 of the tissue web 12 immediately before an inlet gap 18 formed by the TAD wire 10 and the winding drum 5.
  • the first suction box 15 generates a first vacuum zone 19.
  • the suction box 15 has a plurality of suction openings 20 arranged one behind the other in the transverse direction of the TAD wire 10 and facing the web running direction and communicating with the first vacuum zone 19 (see FIG FIG. 2 ).
  • a guide element extending in the transverse direction of the wire 10 and designed as a guide plate 21 is arranged in the web running direction 17 in front of the suction openings 20 and thus in front of the first vacuum zone 19.
  • the guide plate 21 extends in this case in the transverse direction substantially over the air-permeable width of the screen 10.
  • the guide element has a guide surface 33.
  • An end 24 of the guide surface 33 points against the web running direction 17 in the direction of the bottom 22 of the TAD sieve 10 and the other end 34 of the guide surface 33 points in the direction of the suction openings 20.
  • the guide element 21 is formed tapering in cross section to the wire 10.
  • the removal of the air boundary layer 23 from the underside 22 of the TAD sieve 10 is thereby optimized when the pointing in the direction of the bottom 22 of the wire 10 end 24 of the guide surface 33 in close proximity (here: in temporary contact) to the bottom 22 of the wire 10th is arranged so that the distance between the end 24 and the bottom 22 of the wire 10 is as small as possible and thus only a small proportion of the air boundary layer 23 in the gap between the wire 10 and end 24 "escape" can.
  • the suction box 15 has a suction opening 25 extending in the transverse direction of the wire 10 and pointing in the direction of the underside 22 of the wire 10 and communicating with the first vacuum zone 19.
  • the suction opening 25 is in this case arranged in the web running direction 17 behind the baffle 21.
  • the area in which the suction openings 20 and 25 are arranged extends in FIG substantially across the air-permeable width of the TAD mesh 10.
  • the second suction box 29 is arranged, which generates a second negative pressure zone 26.
  • the second vacuum zone 26 extends substantially to the inlet gap 18 and up to a scraper blade 27 acting on the winding drum 5.
  • the first negative pressure zone 19 and the second negative pressure zone 26 are each separately evacuated.
  • the third suction box 30 is arranged in the web running direction 17 in front of the baffle 21, which generates a third on the bottom 22 of the screen 10 acting vacuum zone 31.
  • the third negative pressure zone 31 acts on the underside 22 of the screen 10 via a suction opening 32 communicating with it.
  • FIG. 2 shows a section detail detail of the device 11 according to the invention can be seen is a part of the first suction box 15, through which a first negative pressure zone 19 is formed.
  • the suction box 15 has facing the web running direction 17 suction openings 20 and in the direction of the bottom 22 of the wire 10 facing suction openings 25, which communicate with the first vacuum zone 19.
  • the guide element 21 is in the region of the bottom 22 of the screen 10 facing end 24 of the guide surface 33 in cross-section pointed to the bottom 22 formed tapered and seconded to the bottom 22 immediately adjacent.
  • the entrained with the sieve 10 air boundary layer 23 is peeled off by the pointed formation of the baffle 21 in the region of the end 24 of the guide surface of the bottom 22 of the wire 10 and led away through the guide plate 21 and directed into the suction port 20 into the first vacuum zone 19.
  • FIG. 3 shows the device 11 in section line AA.
  • the first suction box 15 can be seen with the suction openings 20 facing the web running direction 17 and the suction openings 25 pointing in the direction of the underside 22 of the wire.
  • the suction openings 20 and 25 are arranged one behind the other in the transverse extent of the screen 10, their arrangement extending substantially to the air-permeable width of the TAD screen 10 (the screen 10 is permeable to air over its entire width in the illustrated embodiment).
  • FIG. 4 shows the device 11 in section BB.
  • the third suction box 30 can be seen with the suction opening 32 extending in the direction of the underside 22 of the wire 10 and extending in the transverse direction of the wire 10.
  • the suction openings 32 are arranged one behind the other in the transverse extent of the screen 10, their arrangement extending substantially to the air-permeable width of the TAD screen 10 (the screen 10 is permeable to air over its entire width in the illustrated embodiment).

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Advancing Webs (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Paper (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Claims (21)

  1. Dispositif de transfert (6) comprenant un dispositif (11) de stabilisation de transport d'une nappe de matériau (12) guidée sur le côté supérieur (14) d'une toile (10) perméable à l'air, notamment d'une nappe fibreuse, dans lequel le dispositif (11) est disposé sur le côté inférieur de la toile et dans la direction d'avance de la nappe directement avant une fente d'entrée (18) formée par un rouleau (5) et la toile (10) et présente une première zone de dépression (19) agissant sur le côté inférieur de la toile,
    le dispositif (11) présentant au moins une ouverture d'aspiration (20) tournée essentiellement à l'encontre de la direction d'avance de la nappe (17) et communiquant avec la première zone de dépression (19) du dispositif,
    caractérisé en ce que
    la couche limite d'air (23) entraînée par le côté inférieur de la toile est aspirée au moins en partie par la toile (10) directement à travers l'ouverture d'aspiration dans la zone de dépression (19).
  2. Dispositif de transfert (6) selon la revendication 1,
    caractérisé en ce que
    plusieurs ouvertures d'aspiration (20) sont disposées les unes derrière les autres dans la direction transversale de la toile.
  3. Dispositif de transfert (6) selon la revendication 1,
    caractérisé en ce que
    l'on prévoit une ouverture d'aspiration qui s'étend dans la direction transversale notamment essentiellement sur la largeur de la toile.
  4. Dispositif de transfert (6) selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que
    l'on prévoit un élément directeur (21) qui est disposé de telle sorte que la couche limite d'air (23) entraînée par le côté inférieur de la toile soit guidée au moins en partie par la toile (10) vers l'ouverture d'aspiration (20).
  5. Dispositif de transfert (6) selon la revendication 4,
    caractérisé en ce que
    l'élément directeur (21) est disposé dans la direction d'avance de la nappe avant la première zone de dépression (19).
  6. Dispositif de transfert (6) selon la revendication 5,
    caractérisé en ce que
    l'élément directeur (21) présente une face directrice (33).
  7. Dispositif de transfert (6) selon la revendication 6,
    caractérisé en ce que
    la face directrice (33) est tournée du côté d'une extrémité à l'encontre de la direction d'avance de la nappe dans la direction du côté inférieur (22) de la toile (10) et du côté de l'autre extrémité dans la direction de l'ouverture d'aspiration (20) tournée à l'encontre de la direction d'avance de la nappe.
  8. Dispositif de transfert (6) selon la revendication 7,
    caractérisé en ce que
    l'extrémité (24) de la face directrice (33) tournée dans la direction du côté inférieur (22) de la toile est disposée à proximité immédiate du côté inférieur (22) de la toile (10).
  9. Dispositif de transfert (6) selon les revendications 7 ou 8,
    caractérisé en ce que
    l'élément directeur (21), dans la région de l'extrémité de la face directrice (33) tournée vers le côté inférieur (22) de la toile (10) est réalisé de manière à se terminer, en section transversale, en pointe vers la toile.
  10. Dispositif de transfert (6) selon l'une quelconque des revendications précédentes 4 à 9,
    caractérisé en ce que
    l'élément directeur (21) s'étend essentiellement sur la largeur perméable à l'air de la toile (10).
  11. Dispositif de transfert (6) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le dispositif (11) présente au moins une ouverture d'aspiration (25) tournée essentiellement dans la direction du côté inférieur de la toile et communiquant avec la première zone de dépression (19) du dispositif.
  12. Dispositif de transfert (6) selon la revendication 11,
    caractérisé en ce que
    plusieurs ouvertures d'aspiration (25) sont disposées les unes derrière les autres dans la direction transversale de la toile.
  13. Dispositif de transfert (6) selon la revendication 11,
    caractérisé en ce que
    l'on prévoit une ouverture d'aspiration (25) qui s'étend dans la direction transversale notamment essentiellement sur la largeur de la toile.
  14. Dispositif de transfert (6) selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    qu'une deuxième zone de dépression (26) est formée entre la première zone de dépression (19) et la fente d'entrée (18).
  15. Dispositif de transfert (6) selon la revendication 14,
    caractérisé en ce que
    la première (19) et la deuxième (26) zone de dépression convergent.
  16. Dispositif de transfert (6) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    directement avant la fente d'entrée (18) est disposée une lame de racloir (27) agissant sur le rouleau (5) de telle sorte que la couche limite d'air entraînée par le rouleau (5) soit guidée à l'écart du rouleau (5).
  17. Dispositif de transfert (6) selon la revendication 16,
    caractérisé en ce que
    la première (19) et/ou la deuxième (26) zone de dépression est formée dans la région entre la fente d'entrée (18), la lame de racloir (27) et l'élément directeur (21).
  18. Dispositif de transfert (6) selon l'une quelconque des revendications 4 à 17,
    caractérisé en ce que
    qu'une troisième zone de dépression (31) agissant sur le côté inférieur (22) de la toile (10) est formée dans la direction d'avance de la nappe (17) avant l'élément directeur (21).
  19. Dispositif de transfert (6) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le dispositif de transfert (6) est disposé entre un dispositif de séchage, notamment un cylindre de séchage Yankee (2), et un dispositif d'enroulement (3) d'une machine de papier tissu (1).
  20. Dispositif de transfert (6) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la toile (10) est structurée et/ou a une surface rugueuse et/ou est volumineuse.
  21. Dispositif de transfert (6) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la toile (10) est une bande ou une bande de gaufrage ou un feutre ou un feutre de gaufrage ou une membrane, notamment une membrane Spectra ou une bande de séchage à air TAD (through air dryer).
EP05761171A 2004-08-09 2005-07-06 Dispositif de stabilisation de bande Not-in-force EP1778915B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004038769A DE102004038769A1 (de) 2004-08-09 2004-08-09 Vorrichtung zur Bahnstabilisierung
PCT/EP2005/053226 WO2006015918A1 (fr) 2004-08-09 2005-07-06 Dispositif de stabilisation de bande

Publications (2)

Publication Number Publication Date
EP1778915A1 EP1778915A1 (fr) 2007-05-02
EP1778915B1 true EP1778915B1 (fr) 2010-03-31

Family

ID=34972062

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05761171A Not-in-force EP1778915B1 (fr) 2004-08-09 2005-07-06 Dispositif de stabilisation de bande

Country Status (6)

Country Link
US (1) US8080132B2 (fr)
EP (1) EP1778915B1 (fr)
AT (1) ATE462835T1 (fr)
BR (1) BRPI0515022A (fr)
DE (2) DE102004038769A1 (fr)
WO (1) WO2006015918A1 (fr)

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DE102004038769A1 (de) * 2004-08-09 2006-02-23 Voith Fabrics Patent Gmbh Vorrichtung zur Bahnstabilisierung
JP5513167B2 (ja) 2009-03-02 2014-06-04 ユニ・チャーム株式会社 コンベア装置及び吸収性物品の製造方法
AT526335B1 (de) * 2023-02-08 2024-02-15 Berndorf Innovations Und Tech Gmbh Vorrichtung zum Wickeln einer Materialbahn

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Also Published As

Publication number Publication date
ATE462835T1 (de) 2010-04-15
US20080053632A1 (en) 2008-03-06
WO2006015918A1 (fr) 2006-02-16
BRPI0515022A (pt) 2008-07-01
EP1778915A1 (fr) 2007-05-02
DE102004038769A1 (de) 2006-02-23
US8080132B2 (en) 2011-12-20
DE502005009323D1 (de) 2010-05-12

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