EP2192227A2 - Dispositif de guidage ou de transfert d'une bande de matière fibreuse - Google Patents

Dispositif de guidage ou de transfert d'une bande de matière fibreuse Download PDF

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Publication number
EP2192227A2
EP2192227A2 EP09172874A EP09172874A EP2192227A2 EP 2192227 A2 EP2192227 A2 EP 2192227A2 EP 09172874 A EP09172874 A EP 09172874A EP 09172874 A EP09172874 A EP 09172874A EP 2192227 A2 EP2192227 A2 EP 2192227A2
Authority
EP
European Patent Office
Prior art keywords
web
roller
knife roller
belt conveyor
threading strip
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.)
Withdrawn
Application number
EP09172874A
Other languages
German (de)
English (en)
Other versions
EP2192227A3 (fr
Inventor
Josef Schneid
Wolfgang Drefs
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 EP2192227A2 publication Critical patent/EP2192227A2/fr
Publication of EP2192227A3 publication Critical patent/EP2192227A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0063—Devices for threading a web tail through a paper-making machine

Definitions

  • the invention relates to a device for guiding or transferring a fibrous web from a web-emitting web guide surface of a first processing or manufacturing station to a next station or to a web-receiving web guide surface along a web travel within a machine for producing and / or finishing the fibrous web, comprising at least an edge nozzle for detaching a threading strip separated from the web from the web-dispensing guide surface by means of an air jet ejected from the at least one edge nozzle, and comprising a belt conveyor for sucking and advancing the threading strip, the belt conveyor comprising a vacuum box and an air-permeable endless conveyor belt passing over an upstream roller and a roller disposed downstream, and the upstream end of the belt conveyor has a separating member for separating the threading thread fens and formation of a new web start is assigned.
  • EP 1 440 926 Such a device is known from EP 1 440 926 known. On the EP 1 424 441 and the EP 1 245 729 should also be referred to in the context of the prior art.
  • the unpublished DE 10 2008 002 260 shows an arrangement according to the described prior art with a rotating knife.
  • the acceleration of the transported threading strip is too low and is thus in sharp contrast to the full machine and web speed during the transfer process.
  • the threading strip can remain in the removal region, form a ball or lead by folding to a so-called double strip (double tail), with the result of getting caught and tearing off the tape or threading strip in the removal area.
  • this device is more suitable for fibrous webs with a low basis weight.
  • the energy of the edge nozzles used is often insufficient to first guide the web or the threading strip and secondly separate it in the transverse direction for the purpose of achieving a new web or threading strip beginning for the transfer.
  • the upstream roller of the belt conveyor has a smaller diameter than the downstream roller, whereby the vacuum belt conveyor can arrange close enough to the web-issuing web guide surface and thus also the negative pressure region moves close to the web-issuing web guide surface.
  • the threading strip - better than the State of the art - immediately and safely recorded and continued.
  • a transversely acting separating element is associated with the upstream end of the belt conveyor. The separating element serves to separate the threading strip and to form a new web start. As a result, a very accurate and accelerated separation is possible. Overall, thus fibrous webs with high basis weights, such as cardboard sheets are easier to convert.
  • the object of the invention is therefore to provide a device which can separate a threading strip so precisely that it no longer comes to significant problems in the transfer of a web-emitting web guide surface to a web-receiving web guide surface.
  • the separating element comprises a blade provided with at least one blade roller whose axis of rotation is substantially parallel to the axis of the upstream Roller is arranged.
  • the knife roller has a plurality of blades. This increases the security of a separation process.
  • At least one blade is hook-shaped.
  • Several blades are in this case rather in relation to the knife roller length short, sharp-edged tips. In this form, however, the high impact pressure of the blade ensures that the threading strip is cut off. It also comes to a compression of the new web start.
  • At least one blade can be arranged spirally around the knife roller.
  • the slightly oblique dipping of the blade favors the cut.
  • the effect of the transverse shift is usually negligible.
  • the blade can be designed as a left-hand thread on one half of the knife roller and as a right-hand thread on the other half of the knife roller.
  • multiple threads are conceivable.
  • the direction of rotation of the knife roller during the separation process is identical to the direction of rotation of the upstream roller. This ensures that the new web start is guided in the direction of further transport and is directed by the knife roller on the belt conveyor.
  • the peripheral speed of the knife roller is 1 to 1.5 times, preferably 1.05 to 1.2 times, the speed of the threading strip.
  • This speed offers two advantages. First, the blades exert exactly the right pull to separate the web and transport it to the belt conveyor. Secondly, the driving speed is high enough to ensure that there is no overlap even when the web starts to form a loop.
  • the knife roller has a distance of 2 to 6 mm from the web-dispensing surface.
  • the air consumption of the at least one edge nozzle is still very low to lift the EinfädelstMail of the web-delivering surface to a blade of the knife roller.
  • At least one second edge nozzle acts on the same side of the threading strip.
  • the angles between the edge nozzles and the web-dispensing guide surface are adjustable, it is possible to use a jet to lift the threading strip edge from the web-dispensing surface.
  • the other air jet should then be set to blow compressed air between the threading strip and the web dispensing surface so that it can convey the threading strip in the direction of the separating element.
  • the exiting from the first edge nozzle air flow is directed so that it lifts the threading strip on the web-emitting guide surface, which is usually a roller. It forms a kind of hump at a point on the web-emitting guide surface, the threading strip continues to run in the direction of pulper. Only the air supply from the second edge nozzle causes the threading strip comes into contact with the separating element. As a result, the new web start of EinfädelstMails is formed. This "task sharing" of the two air jets has proven to be special proved beneficial and functional. It is no longer common, as in the past, to erroneous attempts when separating the EinfädelstMails.
  • the bearings for the knife roller are connected via a holding device with the housing of the belt conveyor. You can then install the belt conveyor and the knife roller as a compact already aligned unit in a paper or a paper finishing machine. A possibly expensive second holder for the knife roller on the machine stand can be omitted.
  • the motor of the drive of the knife roller is at least partially enclosed in the housing of the belt conveyor.
  • FIG. 1 a device 1 for guiding or transferring a fibrous web 2 is shown.
  • the fibrous web 2 should from a web-emitting web guide surface or processing station 3 to the next station 4 or to an intermediate, web-receiving web guide surface 5 within a machine for producing and / or finishing the fibrous web 2 at startup
  • the machine can be performed or threaded during production or after a web break.
  • the device has at least one first edge nozzle 7.1 and a second edge nozzle 7.2 on at least one side of the threading strip 2c. These edge nozzles serve to detach the threading strip 2c from the web-dispensing guide surface 3.
  • a separating element 11 is provided for strip removal in the transverse direction and for forming the new web or EinfädelstMailterrorismes 2b on the belt conveyor 10.
  • the threading strip 2b is severed transversely and at the same time a new beginning or free end of the threading strip 2b is created.
  • This can now fed to the web-receiving web guide surface 5 and thus the threading to the next station 4 are completed and then the web can be driven ever wider, until the full web width of the fibrous web 2 is reached.
  • the threading strip is fed to the next station 4, it is in the FIG. 1 provided with the reference numeral 2a.
  • the said belt conveyor 10 with its web-receiving web guide surface 5 has a vacuum box 12 and an air-permeable endless conveyor belt 13.
  • the conveyor belt 13 forms with its top the already mentioned web-receiving Web guide surface 5 and runs with its inside over a stroauficartig arranged roll 14 and a downstream arranged roller 15th
  • the upstream roller 14 is formed as a suction roller and forms an upstream end 16 of the belt conveyor 10
  • the downstream roller 15 is a drive roller.
  • the illustrated separating element 11 and also the edge nozzles 7 are arranged at the upstream end 16 and fastened by means of holding devices 25 directly to the housing 26 of the belt conveyor 10.
  • the separating element 11 is the essential new and inventive part of the device 1 for guiding or transferring a fibrous web 2.
  • the blades 21 are fastened to a rotating knife roller 19.
  • the knife roller has an axis of rotation 24 which is arranged parallel to the axis of rotation 27 of the upstream roller 14.
  • the knife roller 19 is located very close to the upstream roller 14 of the belt conveyor and rotates in the same direction of rotation.
  • the separating device 11 is arranged on web-emitting surface 3 and spaced only about 2 - 6 mm from this. This is a very compact, yet easy to implement, effective device for immediate release, separating and transferring a EinfädelstMails created.
  • the blade 21 may have a variety of non-illustrated shapes with a smooth or toothed cutting surface. It may also be merely hook-shaped, so that a particularly hard engagement in the threading 2c takes place. Over the length and circumference of the knife roller 19, the blades 21 may be mounted in multiple, not shown versions. The selection depends on the thickness or the basis weight in g / cm 2 of the fibrous web 2 to be guided or transferred. As a rule, several very short blades 21 are sufficient.
  • the sheet-discharging surface 3 in the example is a surface of a drying cylinder against which a scraper 18 is set. It is advisable to provide that the belt conveyor 10 can be varied in its length by special designs of its housing, by stretching or compression of the same, if desired. Thus, these facilities can be adapted to the local conditions in the machine without much effort and are therefore extremely flexible. However, said length adjustment is not shown in the figures.
  • FIG. 2 shows blades 21, which are arranged on both sides like a left and half-side like a right-hand thread spiraling around the knife roller 19.
  • the threading strip (2c, 2b) is cut uniformly over the entire width without resulting transverse forces, which would lead to an undesired folding or would make the transfer process to the belt conveyor 10 more difficult.
  • Even with fibrous webs with a higher basis weight of 100 to 500 g / m 2 as a trouble-free transfer can be guaranteed.
  • FIG. 2 the arrangement of the edge nozzles 7.1 and 7.2 is shown schematically. It can be clearly seen here that the edge nozzles are given a different blowing direction because they are at an angle to one another.
  • the edge nozzle 7.1 ensures that the threading strip 2c lifts off from the web-dispensing surface 3, for example a drying cylinder surface, in the shape of a hump and thus creates a free space 9 between the web-dispensing surface 3 and the threading strip 2a (see FIG Fig. 1 ) creates.
  • edge nozzle 7.2 With the edge nozzle 7.2 an air blast is then blown in the other direction of action in the free space 9, which moves the threading strip in the direction of separating element 11 and helps to direct the new beginning on the web-receiving web guide surface 5.
  • the air blast from the edge nozzle 7.2 can be much larger and delayed with respect to edge nozzle 7.1.
  • the new web start is automatically performed on the web-receiving surface 5 of the belt conveyor.
  • FIG. 2 an example of a drive option for the knife roller is shown.
  • the drive motor 23 is housed within the housing 26 of the belt conveyor 10. There he is protected from dust. Only the shaft journal looks out of the housing.
  • the pin of the knife roller 19 and the shaft of the motor 23 are drivingly connected, for example by means of V-belts on V-belt pulleys.

Landscapes

  • Advancing Webs (AREA)
  • Preliminary Treatment Of Fibers (AREA)
EP09172874.1A 2008-12-01 2009-10-13 Dispositif de guidage ou de transfert d'une bande de matière fibreuse Withdrawn EP2192227A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810044226 DE102008044226A1 (de) 2008-12-01 2008-12-01 Vorrichtung zum Führen bzw. Überführen einer Faserstoffbahn

Publications (2)

Publication Number Publication Date
EP2192227A2 true EP2192227A2 (fr) 2010-06-02
EP2192227A3 EP2192227A3 (fr) 2013-09-11

Family

ID=41722709

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09172874.1A Withdrawn EP2192227A3 (fr) 2008-12-01 2009-10-13 Dispositif de guidage ou de transfert d'une bande de matière fibreuse

Country Status (3)

Country Link
EP (1) EP2192227A3 (fr)
CA (1) CA2686371A1 (fr)
DE (1) DE102008044226A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108867144A (zh) * 2018-08-10 2018-11-23 山鹰国际控股股份公司 一种造纸机自动引纸器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1245729A1 (fr) 2001-03-26 2002-10-02 Voith Paper Patent GmbH Procédé et dispositif de transfert d'une bande de papier
EP1424441A1 (fr) 2002-11-28 2004-06-02 Voith Paper Patent GmbH Procédé et dispositif pour enfiler une bande de papier
EP1440926A2 (fr) 2000-11-14 2004-07-28 Voith Paper Patent GmbH Transporteur à courroie aspirante et machine comportant un tel convoyeur pour la fabrication ou la finition d'une bande de papier
DE102007014118A1 (de) 2007-03-23 2008-09-25 Voith Patent Gmbh Vorrichtung zum Führen bzw. Überführen einer Papier-, Karton- oder anderen Faserstoffbahn
DE102008002260A1 (de) 2008-06-06 2009-12-10 Voith Patent Gmbh Vorrichtung zum Führen bzw. Überführen einer Faserstoffbahn

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1440926A2 (fr) 2000-11-14 2004-07-28 Voith Paper Patent GmbH Transporteur à courroie aspirante et machine comportant un tel convoyeur pour la fabrication ou la finition d'une bande de papier
EP1245729A1 (fr) 2001-03-26 2002-10-02 Voith Paper Patent GmbH Procédé et dispositif de transfert d'une bande de papier
EP1424441A1 (fr) 2002-11-28 2004-06-02 Voith Paper Patent GmbH Procédé et dispositif pour enfiler une bande de papier
DE102007014118A1 (de) 2007-03-23 2008-09-25 Voith Patent Gmbh Vorrichtung zum Führen bzw. Überführen einer Papier-, Karton- oder anderen Faserstoffbahn
DE102008002260A1 (de) 2008-06-06 2009-12-10 Voith Patent Gmbh Vorrichtung zum Führen bzw. Überführen einer Faserstoffbahn

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108867144A (zh) * 2018-08-10 2018-11-23 山鹰国际控股股份公司 一种造纸机自动引纸器
CN108867144B (zh) * 2018-08-10 2024-05-24 山鹰国际控股股份公司 一种造纸机自动引纸器

Also Published As

Publication number Publication date
CA2686371A1 (fr) 2010-06-01
EP2192227A3 (fr) 2013-09-11
DE102008044226A1 (de) 2010-06-02

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