EP1801286A1 - Machine for producing a fibrous web comprising a high vacuum suction device and method of producing a fibrous web - Google Patents

Machine for producing a fibrous web comprising a high vacuum suction device and method of producing a fibrous web Download PDF

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Publication number
EP1801286A1
EP1801286A1 EP06123715A EP06123715A EP1801286A1 EP 1801286 A1 EP1801286 A1 EP 1801286A1 EP 06123715 A EP06123715 A EP 06123715A EP 06123715 A EP06123715 A EP 06123715A EP 1801286 A1 EP1801286 A1 EP 1801286A1
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EP
European Patent Office
Prior art keywords
web
machine
press
suction
fibrous web
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.)
Ceased
Application number
EP06123715A
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German (de)
French (fr)
Inventor
Dietmar Sporer
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Voith Patent GmbH
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Voith Patent GmbH
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Publication of EP1801286A1 publication Critical patent/EP1801286A1/en
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    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/14Making cellulose wadding, filter or blotting paper
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00Wet end of machines for making continuous webs of paper
    • D21F1/48Suction apparatus
    • D21F1/52Suction boxes without rolls
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00Press section of machines for making continuous webs of paper
    • D21F3/02Wet presses
    • D21F3/0281Wet presses in combination with a dryer roll
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00Press section of machines for making continuous webs of paper
    • D21F3/02Wet presses
    • D21F3/04Arrangements thereof
    • D21F3/045Arrangements thereof including at least one extended press nip

Definitions

  • the invention relates to a machine for producing a guided from an endless and water-permeable carrier tape fibrous web, in particular a tissue or tissue paper web, comprising at least one drying cylinder and a press roll comprehensive press unit.
  • a plurality of machines for producing a fibrous web in particular a tissue or tissue paper web, known in which at least one drying cylinder and a shoe press unit comprehensive shoe press is used to form a lengthened in the web running direction press nip, wherein the fibrous web together with a water-permeable endless carrier tape is passed through the extended press nip.
  • the carrier tape is guided in front of the shoe press on at least one evacuated device.
  • this object is achieved in that the pressing unit is preceded by at least one high-vacuum suction in the web running direction.
  • a high vacuum suction unit may, if in an alternative embodiment, a suction roll, is provided, advantageously between the suction roll and the press roll and / or be arranged in the web running direction before the suction roll.
  • a high-vacuum suction unit can also replace a suction roll.
  • a suction roll For a suction roll to be able to provide a vacuum, first the rotating perforated roll shell must be evacuated. In a high vacuum suction box, the volume that must first be evacuated is significantly less. For this reason, the replacement of a suction roll by a high vacuum generating suction box, the vacuum and thus energy consumption significantly reduced.
  • the high-vacuum suction unit constructed as a suction box is arranged directly in front of an unswept roll, in particular a deflection roll or press roll around which the fibrous web is deflected.
  • an unswept roll in particular a deflection roll or press roll around which the fibrous web is deflected.
  • air can be trapped in the inlet gusset between the unabsucked roller and the press felt, which, since the air is forced through the press felt, can lead to a lifting of the fiber web guided outside the guide roller.
  • the high-vacuum suction unit has at least transversely to the web running direction a plurality of independently suctionable suction zones and / or at least two suction zones in the web running direction.
  • the high-vacuum suction unit comprises at least one suction strip attached to the carrier belt.
  • a further advantage may be that the number of activated suction zones or the number of employed suction strips can be determined according to the web speed.
  • suction zones and / or the Saugleisten operate at a negative pressure corresponding to a water column of 3 m to 7 m.
  • the covering of the at least one suction strip is convexly curved. This makes it possible to minimize the wear of the carrier tape, for example a felt.
  • lubricating spray pipes can be provided.
  • the drying cylinder is designed as Yankee cylinder.
  • the invention also relates to a method for producing a fibrous web, in particular a tissue or tissue paper web, in which the fibrous web is passed from an endless and water-permeable carrier tape through a press nip between a drying cylinder and a press roll.
  • the method is characterized in that the carrier tape is sucked in the web running direction before the press nip by at least one high-vacuum suction unit.
  • a machine 1 for producing a fibrous web 2, which may be a tissue or tissue paper web, has in a forming region 3 a forming roller 4, via which together an endless felt belt or inner or carrier wire 5 and an endless outer screen 6 are performed.
  • the wrap angle of the outer screen 6 with the forming roller 4 is lower than that of the inner wire 5.
  • inlet gap 7 formed between the carrier tape 5 and the outer wire 6 fiber suspension is introduced by means of a headbox 8.
  • the fibrous web 2 forming in the process is guided into a press nip 9 together with the carrier wire 5 after the wrapping area of the forming roller 4.
  • the dewatering of the fibrous web 2 is intensified in such a way that the single press nip 9 is sufficient. This is formed between a designed as Yankee drying cylinder drying cylinder 12 and a shoe press roll 13.
  • the shoe press roll 13 comprises a press shoe 14, which has an at least substantially concave contact surface for pressing the fibrous web 2 and the carrier tape 5 against the jacket surface of the drying cylinder 12.
  • the press shoe 14 is preferably pressed hydraulically against the drying cylinder 12.
  • the shoe press preferably has transverse to the web direction independently mutually controllable pressing zones, whereby an adaptation to the deflection of the drying cylinder 12 and the adjustment of the desired compression pressure profile transverse to the web running direction is possible.
  • the drying in the press nip 9 is further enhanced by a drying hood 15 attached to the drying cylinder 12, which blows hot, dry air onto the fibrous web 2 and sucks it off again.
  • the fibrous web 2 is removed via a creping doctor 16 of the drying cylinder 12.
  • the creped fibrous web 2 can subsequently be further processed and wound up.
  • a further high-vacuum suction unit 17 is arranged, which can be formed for example by a suction box or the like.
  • the dry content of the fibrous web 2 is further increased, as caused by the suction unit 17 caused by the capillary backflow of water from the carrier tape 5 in the fibrous web 2.
  • Fig. 2 shows a schematic representation of another embodiment of a machine 1 for producing a tissue or tissue paper web 2.
  • a simple press roller 18 to the drying cylinder 12 employed.
  • the press roller 18 is preceded by only a single high-vacuum suction unit 17. Otherwise, the construction of the machine shown in FIG. 2 corresponds to that of FIG. 1.
  • FIG. 3 shows an embodiment in which the high-vacuum suction unit 10 designed as a suction box is arranged directly in front of an uninflated deflection roller 20.
  • the side of the suction box 10 facing the deflection roller 20 is shaped to be complementary to the lateral surface of the deflection roller 20, so that substantially no air gap is formed between the deflection roller 20 and the suction box 10.

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Abstract

Machine for producing a web of fibrous material on a water-permeable endless belt (5) comprises a high-vacuum suction system upstream of a press unit comprising a drying cylinder (12) and a press roll (13). An independent claim is also included for producing a web of fibrous material, where the web is carried on a water-permeable endless belt through a press nip between a drying cylinder and a press roll, by applying suction to the belt by means of a high-vacuum suction system upstream of the press nip.

Description

Die Erfindung betrifft eine Maschine zur Herstellung einer von einem endlosen und wasserdurchlässigen Trägerband geführten Faserstoffbahn, insbesondere einer Tissue- oder Hygienepapierbahn, mit wenigstens einer einen Trockenzylinder und eine Presswalze umfassenden Presseinheit.The invention relates to a machine for producing a guided from an endless and water-permeable carrier tape fibrous web, in particular a tissue or tissue paper web, comprising at least one drying cylinder and a press roll comprehensive press unit.

Aus dem Stand der Technik sind eine Vielzahl von Maschinen zur Herstellung einer Faserstoffbahn, insbesondere einer Tissue- oder Hygienepapierbahn, bekannt, bei denen wenigstens eine einen Trockenzylinder und eine Schuhpresseinheit umfassenden Schuhpresse zur Bildung eines in Bahnlaufrichtung verlängerten Pressspaltes eingesetzt wird, wobei die Faserstoffbahn zusammen mit einem wasserdurchlässigen endlosen Trägerband durch den verlängerten Pressspalt geführt wird. Das Trägerband wird vor der Schuhpresse über wenigstens eine besaugte Einrichtung geführt.From the prior art, a plurality of machines for producing a fibrous web, in particular a tissue or tissue paper web, known in which at least one drying cylinder and a shoe press unit comprehensive shoe press is used to form a lengthened in the web running direction press nip, wherein the fibrous web together with a water-permeable endless carrier tape is passed through the extended press nip. The carrier tape is guided in front of the shoe press on at least one evacuated device.

Bei all den bekannten Tissuemaschinen wird ein oft zu niedriger Trockengehalt erzielt.In all the known tissue machines often too low dry content is achieved.

Es ist die Aufgabe der Erfindung, eine Maschine der eingangs genannten Art derart zu verbessern, dass sich der Trockengehalt der Faserstoffbahn erhöht.It is the object of the invention to improve a machine of the type mentioned in such a way that increases the dry content of the fibrous web.

Bei dieser Maschine wird diese Aufgabe dadurch gelöst, dass der Presseinheit wenigstens ein Hochvakuumsaugaggregat in Bahnlaufrichtung vorgeordnet ist.In this machine, this object is achieved in that the pressing unit is preceded by at least one high-vacuum suction in the web running direction.

Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen, der Beschreibung und den Zeichnungen.Advantageous developments emerge from the subclaims, the description and the drawings.

Von Vorteil ist eine Ausgestaltung der Erfindung, gemäß der die wenigstens eine Presswalze eine Schuhwalze ist.An advantage of an embodiment of the invention, according to which the at least one press roll is a shoe roll.

Ein Hochvakuumsaugaggregat kann, wenn in einer alternativen Ausführungsform eine Saugwalze, vorgesehen ist, in vorteilhafter Weise zwischen der Saugwalze und der Presswalze und / oder in Bahnlaufrichtung noch vor der Saugwalze angeordnet sein.A high vacuum suction unit may, if in an alternative embodiment, a suction roll, is provided, advantageously between the suction roll and the press roll and / or be arranged in the web running direction before the suction roll.

Ein Hochvakuumsaugaggregat kann aber auch eine Saugwalze ersetzen. Bei einer Saugwalze muss, dass diese ein Vakuum bereitstellen kann, zuerst der sich drehende gelochte Walzenmantel evakuiert werden. Bei einem ein Hochvakuum erzeugenden Saugkasten ist das Volumen, welches zuerst evakuiert werden muss bedeutend geringer. Aus diesem Grund wird durch den Ersatz einer Saugwalze durch einen als Hochvakuum erzeugenden Saugkasten der Vakuum- und damit Energieverbrauch bedeutend reduziert.A high-vacuum suction unit can also replace a suction roll. For a suction roll to be able to provide a vacuum, first the rotating perforated roll shell must be evacuated. In a high vacuum suction box, the volume that must first be evacuated is significantly less. For this reason, the replacement of a suction roll by a high vacuum generating suction box, the vacuum and thus energy consumption significantly reduced.

Des weiteren ist es nach einer bevorzugten Ausführungsform der Erfindung denkbar, dass das als Saugkasten ausgebildete Hochvakuumsaugaggregat unmittelbar vor einer unbesaugten Walze, insbesondere Umlenkwalze oder Presswalze um die die Faserstoffbahn umgelenkt wird, angeordnet ist. Hierdurch kann verhindert werden, dass Luft im Einlaufzwickel zwischen unbesaugter Walze und Pressfilz eingeschlossen werden kann, was, da die Luft durch das Pressfilz hindurchgedrückt wird, zu einem Abheben der um die Umlenkwalze außen geführten Faserstoffbahn führen kann.Furthermore, according to a preferred embodiment of the invention, it is conceivable that the high-vacuum suction unit constructed as a suction box is arranged directly in front of an unswept roll, in particular a deflection roll or press roll around which the fibrous web is deflected. In this way it can be prevented that air can be trapped in the inlet gusset between the unabsucked roller and the press felt, which, since the air is forced through the press felt, can lead to a lifting of the fiber web guided outside the guide roller.

Zusätzlich lässt sich in vorteilhafter Weise vorsehen, dass das Hochvakuumsaugaggregat zumindest quer zur Bahnlaufrichtung mehrere unabhängig voneinander besaugbare Saugzonen und/oder wenigstens zwei Saugzonen in Bahnlaufrichtung aufweist.In addition, it can be advantageously provided that the high-vacuum suction unit has at least transversely to the web running direction a plurality of independently suctionable suction zones and / or at least two suction zones in the web running direction.

Als vorteilhaft erweist es sich ebenso, wenn das Hochvakuumsaugaggregat wenigstens eine an das Trägerband angestellte Saugleiste umfasst.It also proves to be advantageous if the high-vacuum suction unit comprises at least one suction strip attached to the carrier belt.

Ebenso kann ein weiterer Vorteil darin bestehen, dass sich die Anzahl der eingeschalteten Saugzonen bzw. die Anzahl der angestellten Saugleisten entsprechend der Bahngeschwindigkeit festlegen lässt.Likewise, a further advantage may be that the number of activated suction zones or the number of employed suction strips can be determined according to the web speed.

Eine andere vorteilhafte Ausgestaltung der Erfindung besteht darin, dass die Saugzonen und/oder die Saugleisten bei einem Unterdruck arbeiten, der einer Wassersäule von 3 m bis 7 m entspricht.Another advantageous embodiment of the invention is that the suction zones and / or the Saugleisten operate at a negative pressure corresponding to a water column of 3 m to 7 m.

Insbesondere lässt sich mit Vorteil vorsehen, dass der Belag der wenigstens einen Saugleiste konvex gekrümmt ist. Hierdurch lässt sich der Verschleiß des Trägerbandes, beispielsweise eines Filzes, minimieren.In particular, it can be advantageously provided that the covering of the at least one suction strip is convexly curved. This makes it possible to minimize the wear of the carrier tape, for example a felt.

Um den Verschleiß des Trägerbandes an dem Hochvakuumsaugaggregat zu reduzieren, können Schmierspritzrohre vorgesehen.In order to reduce wear of the carrier tape on the high vacuum suction unit, lubricating spray pipes can be provided.

Vorzugsweise ist der Trockenzylinder als Yankeezylinder ausgebildet.Preferably, the drying cylinder is designed as Yankee cylinder.

Ebenso bezieht sich die Erfindung auch auf ein Verfahren zur Herstellung einer Faserstoffbahn, insbesondere einer Tissue- oder Hygienepapierbahn, bei dem die Faserstoffbahn von einem endlosen und wasserdurchlässigen Trägerband durch einen Pressspalt zwischen einem Trockenzylinder und einer Presswalze hindurchgeführt wird.Likewise, the invention also relates to a method for producing a fibrous web, in particular a tissue or tissue paper web, in which the fibrous web is passed from an endless and water-permeable carrier tape through a press nip between a drying cylinder and a press roll.

Das Verfahren ist dadurch gekennzeichnet, dass das Trägerband in Bahnlaufrichtung vor dem Pressspalt durch wenigstens ein Hochvakuumsaugaggregat besaugt wird.The method is characterized in that the carrier tape is sucked in the web running direction before the press nip by at least one high-vacuum suction unit.

Nachfolgend wird die Erfindung anhand der Zeichnungen in Ausführungsbeispielen näher erläutert. Es zeigen:

Fig. 1 und 2:
schematische Teildarstellungen zweier als Crescentformer ausgeführter, mit einem inneren Filzband versehener Maschinen zur Herstellung einer Tissue- oder Hygienepapierbahn,
Fig.3
eine Ausführungsform mit einem unmittelbar vor einer unbesaugten Umlenkwalze angeordneten Hochvakuumsaugkasten.
The invention will be explained in more detail with reference to the drawings in exemplary embodiments. Show it:
1 and 2:
schematic partial representations of two executed as Crescentformer, provided with an inner felt belt machines for Production of a tissue or tissue paper web,
Figure 3
an embodiment with a immediately before an uninflated deflection roller arranged high vacuum suction box.

Eine Maschine 1 (Fig. 1) zur Herstellung einer Faserstoffbahn 2, bei der es sich um eine Tissue- oder Hygienepapierbahn handeln kann, weist in einem Formierbereich 3 eine Formierwalze 4 auf, über die gemeinsam ein endloses Filzband oder Innen- oder Trägersieb 5 und ein endloses Außensieb 6 geführt werden. Dabei ist der Umschlingungswinkel des Außensiebes 6 mit der Formierwalze 4 geringer als der des Innensiebes 5.A machine 1 (FIG. 1) for producing a fibrous web 2, which may be a tissue or tissue paper web, has in a forming region 3 a forming roller 4, via which together an endless felt belt or inner or carrier wire 5 and an endless outer screen 6 are performed. In this case, the wrap angle of the outer screen 6 with the forming roller 4 is lower than that of the inner wire 5.

In dem zwischen dem Trägerband 5 und dem Außensieb 6 gebildeten Einlaufspalt 7 wird mittels eines Stoffauflaufs 8 Faserstoffsuspension eingebracht. Die sich dabei bildende Faserstoffbahn 2 wird nach dem Umschlingungsbereich der Formierwalze 4 gemeinsam mit dem Trägersieb 5 in einen Pressspalt 9 geführt.In the inlet gap 7 formed between the carrier tape 5 and the outer wire 6 fiber suspension is introduced by means of a headbox 8. The fibrous web 2 forming in the process is guided into a press nip 9 together with the carrier wire 5 after the wrapping area of the forming roller 4.

Bevor es diesen erreicht, wird das die Faserstoffbahn 2 mit sich führende Trägerband 5 gemeinsam mit dieser an einem Saugkasten 10, an dem ein Hochvakuum anliegt, vorbeigeführt und umschlingt eine Saugwalze 11.Before it reaches this, the fibrous web 2 carrying carrier tape 5 together with this on a suction box 10, against which a high vacuum, passes and wraps around a suction roll eleventh

Durch die Kombination des Hochvakuumsaugkastens 10 und der Saugwalze 11 wird die Entwässerung der Faserstoffbahn 2 derart intensiviert, dass der einzige Pressspalt 9 ausreichend ist. Dieser wird zwischen einem als Yankee-Trockenzylinder ausgebildeten Trockenzylinder 12 und einer Schuhpresswalze 13 gebildet.Due to the combination of the high-vacuum suction box 10 and the suction roll 11, the dewatering of the fibrous web 2 is intensified in such a way that the single press nip 9 is sufficient. This is formed between a designed as Yankee drying cylinder drying cylinder 12 and a shoe press roll 13.

Die Schuhpresswalze 13 umfasst einen Pressschuh 14, der eine zumindest im wesentlichen konkave Anpressfläche zur Anpressung der Faserstoffbahn 2 und des Trägerbandes 5 gegen die Mantelfläche des Trockenzylinders 12 besitzt. Der Pressschuh 14 wird vorzugsweise hydraulisch gegen den Trockenzylinder 12 gedrückt. Die Schuhpresse besitzt vorzugsweise quer zur Bahnlaufrichtung unabhängig voneinander ansteuerbare Presszonen, wodurch eine Anpassung an die Durchbiegung des Trockenzylinders 12 sowie die Einstellung des gewünschten Pressdruckprofils quer zur Bahnlaufrichtung möglich ist. Die Trocknung in dem Pressspalt 9 wird durch eine an den Trockenzylinder 12 angestellte Trockenhaube 15 noch verstärkt, welche heiße, trockene Luft auf die Faserstoffbahn 2 bläst und wieder absaugt.The shoe press roll 13 comprises a press shoe 14, which has an at least substantially concave contact surface for pressing the fibrous web 2 and the carrier tape 5 against the jacket surface of the drying cylinder 12. The press shoe 14 is preferably pressed hydraulically against the drying cylinder 12. The shoe press preferably has transverse to the web direction independently mutually controllable pressing zones, whereby an adaptation to the deflection of the drying cylinder 12 and the adjustment of the desired compression pressure profile transverse to the web running direction is possible. The drying in the press nip 9 is further enhanced by a drying hood 15 attached to the drying cylinder 12, which blows hot, dry air onto the fibrous web 2 and sucks it off again.

Nach erfolgter Trocknung wird die Faserstoffbahn 2 über einen Kreppschaber 16 von dem Trockenzylinder 12 entfernt. Die gekreppte Faserstoffbahn 2 kann im Anschluss daran weiter bearbeitet und aufgewickelt werden.After drying, the fibrous web 2 is removed via a creping doctor 16 of the drying cylinder 12. The creped fibrous web 2 can subsequently be further processed and wound up.

Zwischen der Saugwalze 11 und der Presswalze 13 ist ein weiteres Hochvakuumsaugaggregat 17 angeordnet, das beispielsweise durch einen Saugkasten oder dergleichen gebildet werden kann. Durch dieses zusätzliche Hochvakuumsaugaggregat 17 wird der Trockengehalt der Faserstoffbahn 2 weiter gesteigert, da durch das Saugaggregat 17 das durch die Kapillarwirkung bedingte Rückströmen des Wassers vom Trägerband 5 in die Faserstoffbahn 2 verhindert wird.Between the suction roll 11 and the press roll 13, a further high-vacuum suction unit 17 is arranged, which can be formed for example by a suction box or the like. By this additional high-vacuum suction unit 17, the dry content of the fibrous web 2 is further increased, as caused by the suction unit 17 caused by the capillary backflow of water from the carrier tape 5 in the fibrous web 2.

Fig. 2 zeigt in schematischer Darstellung eine weitere Ausführungsform einer Maschine 1 zur Herstellung einer Tissue- oder Hygienepapierbahn 2. Hierbei ist in Vereinfachung des in Fig. 1 dargestellten Aufbaus anstelle der Schuhpresswalze 13 eine einfache Presswalze 18 an den Trockenzylinder 12 angestellt. Der Presswalze 18 ist lediglich ein einziges Hochvakuumsaugaggregat 17 vorgelagert. Im übrigen entspricht der Aufbau der in Fig. 2 dargestellten Maschine der aus Fig. 1.Fig. 2 shows a schematic representation of another embodiment of a machine 1 for producing a tissue or tissue paper web 2. Here, in simplification of the structure shown in Fig. 1 instead of the shoe press roll 13, a simple press roller 18 to the drying cylinder 12 employed. The press roller 18 is preceded by only a single high-vacuum suction unit 17. Otherwise, the construction of the machine shown in FIG. 2 corresponds to that of FIG. 1.

Die Fig. 3 zeigt eine Ausführungsform bei der das als Saugkasten ausgebildete Hochvakuumsaugaggregat 10 unmittelbar vor einer unbesaugten Umlenkwalze 20 angeordnet ist. Wie aus der Figur 3 zu erkennen ist, ist die zur Umlenkwalze 20 weisende Seite des Saugkastens 10 komplementär zur Mantelfläche der Umlenkwalze 20 ausgeformt, sodass im wesentlichen kein Luftspalt zwischen der Umlenkwalze 20 und dem Saugkasten 10 gebildet wird.FIG. 3 shows an embodiment in which the high-vacuum suction unit 10 designed as a suction box is arranged directly in front of an uninflated deflection roller 20. As can be seen from FIG. 3, the side of the suction box 10 facing the deflection roller 20 is shaped to be complementary to the lateral surface of the deflection roller 20, so that substantially no air gap is formed between the deflection roller 20 and the suction box 10.

Hierdurch kann verhindert werden, dass Luft im Einlaufzwickel zwischen der unbesaugten Umlenkwalze 20 und dem als Pressfilz ausgebildeten Trägerband 5 eingeschlossen werden kann, was, da die Luft durch das Pressfilz 5 hindurchgedrückt wird, zu einem Abheben der um die Umlenkwalze 20 außen geführten Faserstoffbahn 2 führen kann.In this way it can be prevented that air can be trapped in the inlet gusset between the non-aspirated deflecting roller 20 and the carrier belt 5 formed as press felt, which, since the air is forced through the press felt 5, leads to a lifting of the fibrous web 2 guided around the deflecting roller 20 on the outside can.

Claims (10)

Maschine (1) zur Herstellung einer von einem endlosen und wasserdurchlässigen Trägerband (5) geführten Faserstoffbahn (2), insbesondere einer Tissue- oder Hygienepapierbahn, mit wenigstens einer einen Trockenzylinder (12) und eine Presswalze (12, 18) umfassenden Presseinheit,
dadurch gekennzeichnet,
dass der Presseinheit wenigstens ein Hochvakuumsaugaggregat (10, 17, 19) in Bahnlaufrichtung vorgeordnet ist.
Machine (1) for producing a fibrous web (2) guided by an endless and water-permeable carrier tape (5), in particular a tissue or tissue paper web, with at least one press unit comprising a drying cylinder (12) and a press roll (12, 18),
characterized,
in that at least one high-vacuum suction unit (10, 17, 19) is arranged upstream of the press unit in the web running direction.
Maschine (1) nach Anspruch 1,
dadurch gekennzeichnet,
dass die wenigstens eine Presswalze eine Schuhpresswalze (13) ist.
Machine (1) according to claim 1,
characterized,
in that the at least one press roll is a shoe press roll (13).
Maschine (1) nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
dass der Presswalze (13) in Bahnlaufrichtung eine Saugwalze (11) vorgeordnet ist und dass ein Hochvakuumsaugaggregat (10, 17) der Saugwalze (11) vor- und/oder nachgeordnet ist.
Machine (1) according to claim 1 or 2,
characterized,
in that a suction roll (11) is arranged upstream of the press roll (13) in the web running direction and that a high-vacuum suction unit (10, 17) is arranged upstream and / or downstream of the suction roll (11).
Maschine (1) nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
dass das Hochvakuumsaugaggregat (10, 17, 19) zumindest quer zur Bahnlaufrichtung mehrere unabhängig voneinander besaugbare Saugzonen und/oder wenigstens zwei Saugzonen in Bahnlaufrichtung aufweist.
Machine (1) according to one of claims 1 to 3,
characterized,
in that the high-vacuum suction unit (10, 17, 19) has at least transversely to the web running direction a plurality of independently suctionable suction zones and / or at least two suction zones in the web running direction.
Maschine (1) nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
dass das Hochvakuumsaugaggregat (10, 17, 19) wenigstens eine an das Trägerband (5) angestellte Saugleiste umfasst.
Machine (1) according to one of claims 1 to 4,
characterized,
that the high vacuum suction unit (10, 17, 19) at least one of the Carrier tape (5) Employed squeegee.
Maschine (1) nach Anspruch 4 oder 5,
dadurch gekennzeichnet,
dass die Anzahl der eingeschalteten Saugzonen bzw. die Anzahl der angestellten Saugleisten entsprechend der Bahngeschwindigkeit festlegbar ist.
Machine (1) according to claim 4 or 5,
characterized,
that the number of turned-on suction zones or the number of employed suction bars can be fixed in accordance with the web speed.
Maschine (1) nach einem der Ansprüche 4 bis 6,
dadurch gekennzeichnet,
dass die Saugzonen und/oder die Saugleisten bei einem Unterdruck arbeiten, der einer Wassersäule von 3 m bis 7 m entspricht.
Machine (1) according to one of claims 4 to 6,
characterized,
that the suction zones and / or the suction bars operate at a negative pressure corresponding to a water column of 3 m to 7 m.
Maschine (1) nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet,
dass der Belag der wenigstens einen Saugleiste konvex gekrümmt ist.
Machine (1) according to one of claims 1 to 7,
characterized,
that the covering of at least one squeegee is convexly curved.
Maschine (1) nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet,
dass der Trockenzylinder (12) als Yankeezylinder ausgebildet ist.
Machine (1) according to one of claims 1 to 8,
characterized,
that the drying cylinder (12) is constructed as a Yankee cylinder.
Verfahren zur Herstellung einer Faserstoffbahn (2), insbesondere einer Tissue- oder Hygienepapierbahn, bei dem die Faserstoffbahn (2) von einem endlosen und wasserdurchlässigen Trägerband (5) durch einen Pressspalt zwischen einem Trockenzylinder (12) und einer Presswalze (13, 18) hindurchgeführt wird,
dadurch gekennzeichnet,
dass das Trägerband (5) in Bahnlaufrichtung vor dem Pressspalt durch wenigstens ein Hochvakuumsaugaggregat (10, 17, 19) besaugt wird.
Method for producing a fibrous web (2), in particular a tissue or tissue paper web, in which the fibrous web (2) passes from an endless and water-permeable carrier web (5) through a press nip between a drying cylinder (12) and a press roll (13, 18) becomes,
characterized,
in that the carrier tape (5) in the web running direction before the press nip is evacuated by at least one high-vacuum suction unit (10, 17, 19).
EP06123715A 2005-12-21 2006-11-09 Machine for producing a fibrous web comprising a high vacuum suction device and method of producing a fibrous web Ceased EP1801286A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200510061100 DE102005061100A1 (en) 2005-12-21 2005-12-21 Hochvakuumsaugaggregat

Publications (1)

Publication Number Publication Date
EP1801286A1 true EP1801286A1 (en) 2007-06-27

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DE (1) DE102005061100A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111819327A (en) * 2018-01-11 2020-10-23 亚赛利纸业设备股份公司 Machine and method for making tissue paper

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5260171A (en) 1990-06-29 1993-11-09 The Procter & Gamble Company Papermaking belt and method of making the same using a textured casting surface
US5776311A (en) 1996-09-03 1998-07-07 The Procter & Gamble Company Vacuum apparatus having transitional area for controlling the rate of application of vacuum in a through air drying papermaking process
EP1176250A2 (en) 2000-07-03 2002-01-30 Voith Paper Patent GmbH Process and apparatus for making a fibrous web
US20040173333A1 (en) 2000-06-30 2004-09-09 Hermans Michael Alan Method for making tissue sheets on a modified conventional crescent-former tissue machine
US20050167061A1 (en) 2004-01-30 2005-08-04 Scherb Thomas T. Paper machine dewatering system
EP1586700A1 (en) 2004-04-13 2005-10-19 Voith Paper Patent GmbH Paper machine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5260171A (en) 1990-06-29 1993-11-09 The Procter & Gamble Company Papermaking belt and method of making the same using a textured casting surface
US5776311A (en) 1996-09-03 1998-07-07 The Procter & Gamble Company Vacuum apparatus having transitional area for controlling the rate of application of vacuum in a through air drying papermaking process
US20040173333A1 (en) 2000-06-30 2004-09-09 Hermans Michael Alan Method for making tissue sheets on a modified conventional crescent-former tissue machine
EP1176250A2 (en) 2000-07-03 2002-01-30 Voith Paper Patent GmbH Process and apparatus for making a fibrous web
US20050167061A1 (en) 2004-01-30 2005-08-04 Scherb Thomas T. Paper machine dewatering system
EP1586700A1 (en) 2004-04-13 2005-10-19 Voith Paper Patent GmbH Paper machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111819327A (en) * 2018-01-11 2020-10-23 亚赛利纸业设备股份公司 Machine and method for making tissue paper
CN111819327B (en) * 2018-01-11 2023-04-28 亚赛利纸业设备股份公司 Machine and method for manufacturing tissue paper

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