EP1126064B1 - Device for hydraulically needling a fibrous web by projecting a fluid - Google Patents

Device for hydraulically needling a fibrous web by projecting a fluid Download PDF

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Publication number
EP1126064B1
EP1126064B1 EP01103216A EP01103216A EP1126064B1 EP 1126064 B1 EP1126064 B1 EP 1126064B1 EP 01103216 A EP01103216 A EP 01103216A EP 01103216 A EP01103216 A EP 01103216A EP 1126064 B1 EP1126064 B1 EP 1126064B1
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EP
European Patent Office
Prior art keywords
endless belt
endless
nozzle bar
fibrous web
endless belts
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Revoked
Application number
EP01103216A
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German (de)
French (fr)
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EP1126064A2 (en
EP1126064A3 (en
Inventor
GmbH & Co. Maschinenfabrik Fleissner
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Truetzschler Nonwovens GmbH
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Fleissner GmbH
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Publication of EP1126064A2 publication Critical patent/EP1126064A2/en
Publication of EP1126064A3 publication Critical patent/EP1126064A3/en
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H18/00—Needling machines
    • D04H18/04—Needling machines with water jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
    • B25H1/0021—Stands, supports or guiding devices for positioning portable tools or for securing them to the work
    • B25H1/0057—Devices for securing hand tools to the work
    • B25H1/0064—Stands attached to the workpiece

Definitions

  • the device of this type has the advantage that the bulky fiber web between the two endless belts slowly increasing and with even Pressure is compressed from above and below without shear stress and only then if they are held firmly between the two endless belts and to the Needling drum is guided, is wetted on this needling drum.
  • the two rollers in front of and behind the nozzle bar make the fleece stronger against the Needling drum pressed. This stronger compression, or more correctly, the better Holding the fibers of the fiber web when wetting prevents blurring Individual fibers and ultimately leads to a better nonwoven product.
  • the device has proven itself in practice, it is particularly characterized by an intensive wetting generated immediately on the needling drum and then after removal of the second from the first endless belt by one on the Needling drum still possible needling by means of a second, now directed directly against the fibrous web lying on the needling drum Nozzle bar.
  • the construction is very complex and for some products too expensive. It is the object of the invention to provide a simpler construction find that meets the same conditions.
  • the aim of the device supplement according to the invention is achieved if this additional guide roller for both endless belts in the plane of the leading Trums shifted that on this deflection roller depending on the desired pressing pressure one for the endless belts larger or smaller wrap angle of both Endless belts are created on the deflection roller. So the angle must be greater than 1 degree and in practice is probably between 5 and 35, up to 45 degrees.
  • a compacting unit 1 with only one Nozzle bar 2 with suction 2 'shown.
  • This unit 1 is usually the First unit of a larger water needling plant, in which there are several further z. B. Ribbon needling units can connect.
  • this unit 1 consists of a first endless belt 3, which has several rollers 4 arranged rotatably in a further holding frame, not shown, 5, 6 ', 6 ", 6 is deflected and held taut.
  • This endless belt 3 runs in In the direction of arrow 7, an initially voluminous fibrous web 8 to be needled can also be a fibrous web that is very thin and in this respect with none at first Strength is provided and thus from a card, not shown, directly on the Endless belt 3 is filed.
  • the first endless belt 3 is assigned a second endless belt 9 in opposite directions, that the working strand 3 'of the first endless belt 3 is the working strand 9' of the second Endless belt opposite, there run the runs 3 ', 9' in the same direction and taper towards each other in this area.
  • This is again through several Rolls 10, 11, 12, 12 'of the endless belt 9 causes the above Holding frame are rotatably mounted.
  • the deflection rollers 13, 14 are somewhat apart arranged away in the holding frame, the roller 13 is replaced by the deflection roller 11, and the nozzle unit 2 ", 2 '' 'are arranged between these deflecting rollers 14, 11.
  • a further deflection roller 15 can the roller 14 above the runs 3 '9' Endless belts 3, 9 are provided for further pressing of the incoming fleece his. This also applies to FIG. 1, where this roller 15 is also shown optionally.
  • the belt support roller 5 is dispensed with, so that the device can be built a bit more compact.
  • the compacting unit 1 is a further nozzle bar 16 associated with suction 16 ', that for the one lying freely on the first endless belt 3' wetted fleece is provided for immediate needling. So before that the upper second endless belt 9 is deflected upwards so that the fleece is not at the top is further covered.
  • the nozzle bar 16 should definitely still be the first endless belt 3 be assigned so that the fleece is larger before removal from belt 3 Has firmness. Further needling devices 17 can follow. Here is one pure ribbon needling or also possible with needling drums.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)

Description

Aus der EP-A-0 859 076 ist eine Vorrichtung zum hydrodynamischen Verschlingen zum vorzugsweise bindemittelfreien Verfestigen der Fasern einer Faserbahn aus natürlichen und/oder künstlichen Fasern jeglicher Art bekannt. Sie besteht aus

  • a. einem die Faserbahn unterstützenden ersten Endlosband, das zwischen mindesten zwei Walzen gespannt geführt und umgelenkt ist,
  • b. einer durchlässigen Vernadelungstrommel, die von dem Endlosband umschlungen ist, wobei
  • c. dem ersten Endlosband ein zweites ebenfalls zwischen mindesten zwei Walzen gespannt geführtes Endlosband gegenläufig zugeordnet ist, dessen dem Arbeitstrum des ersten Endlosbandes gegenüber liegendes Arbeitstrum in der gleichen Richtung angetrieben umläuft wie das des ersten Endlosbandes, weiterhin
  • d. die beiden Arbeitstrums der beiden Endlosbänder in ihrer Längserstreckung am Einlauf konisch aufeinander zu gerichtet sind, so dass die auf dem Arbeitstrum des ersten Endlosbandes liegende Faserbahn zwischen den vorlaufenden Endlosbändern zunehmend verdichtet wird,
  • e. die beiden Endlosbänder von zwei Walzen gegen diese Vernadelungstrommel zur stärkeren Umschlingung der Vernadelungstrommel gedrückt sind und
  • f. zwischen diesen beiden Walzen ein Düsenbalken zur Netzung der Faserbahn gegen die zwischen den beiden Endlosbändern verdichtet gehaltene Faserbahn und gegen die Vernadelungstrommel gerichtet ist.
    • From EP-A-0 859 076 a device for hydrodynamic entangling for the preferably binder-free solidification of the fibers of a fiber web made of natural and / or artificial fibers of any kind is known. it consists of
  • a. a first endless belt supporting the fiber web, which is guided and deflected between at least two rollers,
  • b. a permeable needling drum, which is wrapped in the endless belt, wherein
  • c. the first endless belt is assigned a second endless belt, likewise tensioned between at least two rollers, the working belt of which lies opposite the working strand of the first endless belt and continues to rotate in the same direction as that of the first endless belt
  • d. the two working strands of the two endless belts are conically directed towards one another in their longitudinal extent at the inlet, so that the fiber web lying on the working strand of the first endless belt is increasingly compressed between the leading endless belts,
  • e. the two endless belts are pressed by two rollers against this needling drum for stronger wrapping of the needling drum and
  • f. between these two rollers, a nozzle bar for wetting the fibrous web is directed against the fibrous web held compressed between the two endless belts and against the needling drum.

    • Die Vorrichtung dieser Art hat den Vorteil, dass die voluminös vorlaufende Faserbahn zwischen den beiden Endlosbändern langsam zunehmend und mit gleichmäßigem Druck von oben und unten ohne Scherbeanspruchung verdichtet wird und erst dann, wenn sie zwischen den beiden Endlosbändern fest gehalten und zu der Vernadelungstrommel geführt ist, an dieser Vernadelungstrommel genetzt wird. Durch die beiden Walzen vor und hinter dem Düsenbalken wird das Vlies stärker gegen die Vernadelungstrommel gepresst. Diese stärkere Verdichtung oder richtiger, der bessere Halt der Fasern der Faserbahn beim Netzen verhindert ein Verschwimmen von Einzelfasern und führt letztlich zu einem besseren Vliesprodukt.The device of this type has the advantage that the bulky fiber web between the two endless belts slowly increasing and with even Pressure is compressed from above and below without shear stress and only then if they are held firmly between the two endless belts and to the Needling drum is guided, is wetted on this needling drum. By The two rollers in front of and behind the nozzle bar make the fleece stronger against the Needling drum pressed. This stronger compression, or more correctly, the better Holding the fibers of the fiber web when wetting prevents blurring Individual fibers and ultimately leads to a better nonwoven product.

    Die Vorrichtung hat sich in der Praxis bewährt, sie zeichnet sich insbesondere durch eine gleich auf der Vernadelungstrommel erzeugte intensive Benetzung und anschließend nach Abführung des zweiten vom ersten Endlosband durch eine auf der Vernadelungstrommel noch mögliche Vernadelung mittels eines zweiten, jetzt unmittelbar gegen die auf der Vernadelungstrommel liegende Faserbahn gerichteten Düsenbalkens aus. Die Konstruktion ist aber sehr aufwendig und für manche Produkte zu teuer. Es liegt der Erfindung die Aufgabe zugrunde eine einfachere Konstruktion zu finden, die die gleichen Bedingungen erfüllt.The device has proven itself in practice, it is particularly characterized by an intensive wetting generated immediately on the needling drum and then after removal of the second from the first endless belt by one on the Needling drum still possible needling by means of a second, now directed directly against the fibrous web lying on the needling drum Nozzle bar. The construction is very complex and for some products too expensive. It is the object of the invention to provide a simpler construction find that meets the same conditions.

    Zur Lösung der gestellten Aufgabe sieht die Erfindung eine Vorrichtung zum hydrodynamischen Beaufschlagen einer Faserbahn mit einem Fluid zum vorzugsweise bindemittelfreien Verfestigen der Fasern der Faserbahn aus natürlichen und/oder künstlichen Fasern jeglicher Art vor, die besteht aus:

  • a) einem die Faserbahn unterstützenden ersten Endlosband, das zwischen mindesten zwei Walzen gespannt geführt und umgelenkt ist,
  • b) einem ebenfalls zwischen mindesten zwei Walzen gespannt geführten, dem ersten Endlosband zugeordneten gegenläufigen zweiten Endlosband, dessen dem Arbeitstrum des ersten Endlosbandes gegenüber liegendes Arbeitstrum in der gleichen Richtung angetrieben umläuft wie das Arbeitstrum des ersten Endlosbandes, wobei
  • c) die beiden Arbeitstrums der beiden Endlosbänder am Einlauf in ihrer Längserstreckung konisch aufeinander zu gerichtet sind, so dass die auf dem Arbeitstrum des ersten Endlosbandes liegende Faserbahn zwischen den vorlaufenden Endlosbändern zunehmend verdichtet wird,
  • d) einem den beiden miteinander umlaufenden Endlosbändern in einem nicht von einer Umlenkwalze unterstützten Bereich zugeordneten ersten Düsenbalken zum z. B. nur Benetzen der Faserbahn und wobei
  • e) das erste Endlosband im Bereich des ersten Düsenbalkens von zumindest einer zusätzlichen Umlenkwalze gegen das unmittelbar zugeordnete Trum des zweiten Endlosbandes oder umgekehrt das zweite gegen das erste Endlosband zur stärkeren Anpressung der beiden miteinander vorlaufenden Trums der Endlosbänder gedrückt ist.
    • To achieve the object, the invention provides a device for hydrodynamically applying a fluid to a fiber web for preferably binding-free solidification of the fibers of the fiber web made of natural and / or artificial fibers of any kind, which consists of:
  • a) a first endless belt supporting the fiber web, which is guided and deflected between at least two rollers,
  • b) a counter-rotating second endless belt, likewise tensioned between at least two rollers, assigned to the first endless belt, the working strand lying opposite the working strand of the first endless belt rotating in the same direction as the working strand of the first endless belt, wherein
  • c) the two working strands of the two endless belts at the inlet are conically directed towards one another in their longitudinal extent, so that the fiber web lying on the working strand of the first endless belt is increasingly compressed between the leading endless belts,
  • d) a first nozzle bar assigned to the two endless belts rotating with one another in a region not supported by a deflecting roller for z. B. only wetting the fiber web and where
  • e) the first endless belt is pressed in the region of the first nozzle bar by at least one additional deflecting roller against the directly assigned strand of the second endless belt or vice versa the second is pressed against the first endless belt to apply greater pressure to the two mutually advancing strands of the endless belts.

    • Mit dieser Vorrichtung ist erreicht, dass ähnlich wie bei der Vorrichtung nach der EP-A-0 859 076 das zu netzende Vlies zwischen den Endlosbändern zunehmend gepresst und damit kompaktiert und dann auch ohne die vorbekannte Vernadelungstrommel weiterhin fest gehalten ist. Es kommt also hier auf ein langsames Kompaktieren und auf das Fixieren, Festhalten des vorzugsweise auch dünnen Vlieses zwischen den Bändern beim Beaufschlagen mit den ersten Wasserstrahlen an. Dies ist gegeben bei der vorbekannten Vorrichtung, wo die Endlosbänder beim Wasservernadeln gegen die Vernadelungstrommel gepresst werden. Bei dieser neuen Vorrichtung entfällt die Vernadelungstrommel entsprechend der älteren WO-A-01/51693, und es wird in einfacherer Weise nur zwischen den beiden Arbeitstrums der Endlosbänder vernadelt. Diese Endlosbänder werden aber bei der Konstruktion nach der vorbekannten Vorrichtung dem Druck der Wasserstrahlen nachgeben, so dass das Vlies beim Wasservernadeln nicht fest zwischen den Endlosbändern gehalten ist. Außerdem schleifen die durchhängenden Endlosbänder im Bereich der Absaugung gegen die Absaugschlitzbegrenzungen. Um diese Probleme zu beseitigen, müssen die Endlosbänder im Bereich des Düsenbalkens exakt geführt gehalten sein. Dies ist mit nur einer oder besser zwei zusätzlichen Umlenkwalzen gemäß der Erfindung erzielbar.With this device it is achieved that similar to the device according to EP-A-0 859 076 the fleece to be wetted is increasingly pressed between the endless belts and thus compacted and then without the known needling drum is still held firmly. So it comes down to slow compacting and on fixing, holding the preferably thin fleece between the Tapes when applying the first water jets. This is the case with the previously known device where the endless belts when needling against the Needling drum to be pressed. With this new device the Needling drum according to the older WO-A-01/51693, and it is in simply needled between the two working strands of the endless belts. However, these endless belts are known in the construction according to the Giving the device to the pressure of the water jets so that the fleece at Water needling is not held firmly between the endless belts. Moreover grind the sagging endless belts in the area of the suction against the Absaugschlitzbegrenzungen. To solve these problems, the Endless belts in the area of the nozzle bar must be kept exactly guided. This is with only one or better two additional deflection rollers can be achieved according to the invention.

    Das Ziel bei der erfindungsgemäßen Vorrichtungsergänzung ist erreicht, wenn diese zusätzliche Umlenkwalze für beide Endlosbänder derart in die Ebene der vorlaufenden Trums verlagert ist, dass an dieser Umlenkwalze je nach dem gewünschten Pressdruck ein für die Endlosbänder größerer oder kleinerer Umschlingungswinkel beider Endlosbänder an der Umlenkwalze entsteht. Der Winkel muss also größer als 1 Grad sein und liegt in der Praxis wohl zwischen 5 und 35, bis zu 45 Grad. The aim of the device supplement according to the invention is achieved if this additional guide roller for both endless belts in the plane of the leading Trums shifted that on this deflection roller depending on the desired pressing pressure one for the endless belts larger or smaller wrap angle of both Endless belts are created on the deflection roller. So the angle must be greater than 1 degree and in practice is probably between 5 and 35, up to 45 degrees.

    Mehrere Vorrichtungen der erfindungsgemäßen Art sind in der Zeichnung beispielhaft dargestellt. Anhand dieser sollen noch weitere erfinderische Details erläutert werden.Several devices of the type according to the invention are exemplary in the drawing shown. On the basis of this, further inventive details are to be explained.

    Es zeigen:

    Fig. 1
    in der Seitenansicht eine Kompaktiereinheit mit zwei zur Anpressung der Endlosbänder gleichsinnig nach oben versetzten Umlenkwalzen,
    Fig.2
    die Vorrichtung nach Fig. 1 mit weiterhin zwei gegensinnig bewegten Umlenkwalzen, um die sich die Bänder mäanderförmig schlingen,
    Fig. 3
    eine Vorrichtung ähnlich der nach Fig. 2, jedoch mit einem Düsenbalken, der zwischen den mäanderförmig umschlungenen Umlenkwalzen angeordnet ist, und
    Fig. 4
    ein nur teilweise anderer Aufbau gegenüber der Vorrichtung nach Fig. 2.
    Show it:
    Fig. 1
    in the side view a compacting unit with two deflecting rollers which are offset upwards in the same direction for pressing on the endless belts,
    Fig.2
    1 with two deflecting rollers moving in opposite directions, around which the bands wind in a meandering fashion,
    Fig. 3
    a device similar to that of FIG. 2, but with a nozzle bar, which is arranged between the meandering looped deflection rollers, and
    Fig. 4
    an only partially different construction compared to the device according to FIG. 2.

    In einem nicht dargestellten Rahmengestell ist eine Kompaktiereinheit 1 mit nur einem Düsenbalken 2 mit Absaugung 2' dargestellt. Diese Einheit 1 ist normalerweise die erste Einheit einer größeren Wasservernadelungsanlage, bei der sich also mehrere weitere z. B. Band-Vernadelungseinheiten anschließen können.In a frame frame, not shown, there is a compacting unit 1 with only one Nozzle bar 2 with suction 2 'shown. This unit 1 is usually the First unit of a larger water needling plant, in which there are several further z. B. Ribbon needling units can connect.

    Grundsätzlich besteht diese Einheit 1 aus einem ersten Endlosband 3, das über mehrere in einem nicht dargestellten weiteren Haltegestell drehbar angeordnete Walzen 4, 5, 6', 6", 6 umgelenkt und gespannt gehalten ist. Auf dieses Endlosband 3 läuft in Richtung des Pfeils 7 eine zu vernadelnde zunächst voluminösere Faserbahn 8. Es kann auch eine Faserbahn sein, die sehr dünn ist und insofern mit zunächst keiner Festigkeit versehen ist und somit von einer nicht dargestellten Krempel direkt auf das Endlosband 3 abgelegt wird.Basically, this unit 1 consists of a first endless belt 3, which has several rollers 4 arranged rotatably in a further holding frame, not shown, 5, 6 ', 6 ", 6 is deflected and held taut. This endless belt 3 runs in In the direction of arrow 7, an initially voluminous fibrous web 8 to be needled can also be a fibrous web that is very thin and in this respect with none at first Strength is provided and thus from a card, not shown, directly on the Endless belt 3 is filed.

    Dem ersten Endlosband 3 ist ein zweites Endlosband 9 gegenläufig derart zugeordnet, dass das Arbeitstrum 3' des ersten Endlosbandes 3 dem Arbeitstrum 9' des zweiten Endlosbandes gegenüberliegt, dort die Trums 3', 9' in der gleichen Richtung umlaufen und in diesem Bereich konisch aufeinander zu laufen. Dies ist wiederum durch mehrere Walzen 10, 11, 12, 12' des Endlosbandes 9 bewirkt, die am genannten Haltegestell drehbar gelagert sind. The first endless belt 3 is assigned a second endless belt 9 in opposite directions, that the working strand 3 'of the first endless belt 3 is the working strand 9' of the second Endless belt opposite, there run the runs 3 ', 9' in the same direction and taper towards each other in this area. This is again through several Rolls 10, 11, 12, 12 'of the endless belt 9 causes the above Holding frame are rotatably mounted.

    Zwei der Walzen des ersten Endlosbandes 3, nämlich die Walzen 4 und 5 spannen das Endlosband 3 gegen das Endlosband 9, dessen Arbeitstrum 9' zwischen den Walzen 10, 11 gespannt gehalten ist. Dies heißt, dass die Walzen 4 und 5 das gespannt geführte Trum 3' des Endlosbandes 3 gegen das Trum 9' des Endlosbandes 9 von unten drücken. Damit tangieren die Trums 3', 9' der Endlosbänder 3, 9 die Umlenkwalzen 4, 5 nicht, sondern die Umlenkwalzen 4, 5 sind mit einem Anpresswinkel α von den Trums 3', 9' der Endlosbänder 3, 9 umschlungen. Die Umlenkwalzen 4, 5 sind dicht beieinander angeordnet und lassen zwischen sich soviel Platz, dass der Düsenbalken 2 mit der Absaugung 2' genügend Platz hat. Auf diese Weise ist die gelieferte und von dem Trum 3' des Endlosbandes 3 vorgetragene Faserbahn nicht nur zwischen den Trums 3', 9' der Endlosbänder 3 und 9 langsam verdichtet, sondern beim Netzen gepresst gehalten. Außerdem sind die Trums 3', 9' der Endlosbänder 3, 9 im Bereich der Absaugung 2' durch die Walzen 4, 5 nach unten abgestützt, so dass die Trums 3', 9' nicht dem Druck der Wasserstrahlen nach unten nachgeben können.Two of the rollers of the first endless belt 3, namely the rollers 4 and 5, tension the endless belt 3 against the endless belt 9, whose run 9 'between the rollers 10, 11 is kept tense. This means that the rollers 4 and 5 are tensioned guided run 3 'of the endless belt 3 against the run 9' of the endless belt 9 of press down. Thus the runs 3 ', 9' of the endless belts 3, 9 affect the Deflection rollers 4, 5 not, but the deflection rollers 4, 5 are with a contact angle α wrapped around by the runs 3 ', 9' of the endless belts 3, 9. The Deflection rollers 4, 5 are arranged close together and leave so much between them Space that the nozzle bar 2 with the suction 2 'has enough space. To this The way is the one delivered and carried forward by the strand 3 'of the endless belt 3 Fiber web not only slowly compacted between the runs 3 ', 9' of the endless belts 3 and 9, but kept pressed while wetting. In addition, the trums 3 ', 9' are the Endless belts 3, 9 in the area of the suction 2 'through the rollers 4, 5 downwards supported so that the runs 3 ', 9' do not face the pressure of the water jets can give in.

    Das gleiche Prinzip ist beibehalten, wenn wie im Ausführungsbeispiel nach Fig. 2 dargestellt zwei zusätzliche Walzen 13, 14 je eine ober- und eine unterhalb der Trums 3', 9' der Endlosbänder 3, 9 vor dem Düsenbalken 2 vorgesehen sind und diese die beiden Trums 3', 9' der Endlosbänder 3, 9 zwischen sich halten und dann derart miteinander verlagert sind, dass die beiden Walzen 13, 14 von den Trums 3', 9' der Endlosbänder 3, 9 mit dem Anpresswinkel a mäanderförmig umschlungen sind. Die Walze 4 kann das Trum 3' des Endlosbandes 3 unmittelbar vor dem Düsenbalken 2, 2' unten abstützen. Bei diesem Ausführungsbeispiel wird ein höherer Anpressdruck gegen das Vlies entstehen.The same principle is retained if, as shown in the exemplary embodiment according to FIG. 2 two additional rollers 13, 14 one above and one below the runs 3 ', 9 'of the endless belts 3, 9 are provided in front of the nozzle bar 2 and these the hold two strands 3 ', 9' of the endless belts 3, 9 between them and then in such a way are shifted with each other so that the two rollers 13, 14 of the runs 3 ', 9' of the Endless belts 3, 9 are wrapped in meandering fashion with the contact angle a. The Roller 4 can run the strand 3 'of the endless belt 3 immediately in front of the nozzle bar 2, 2' support at the bottom. In this embodiment, a higher contact pressure against the fleece.

    Bei der Vorrichtung nach der Fig. 3 sind die Umlenkwalzen 13, 14 etwas voneinander weg im Haltegestell angeordnet, die Walze 13 ist durch die Umlenkwalze 11 ersetzt, und die Düseneinheit 2", 2''' zwischen diesen Umlenkwalzen 14, 11 angeordnet. Eine weitere Umlenkwalze 15 kann der Walze 14 oberhalb der Trums 3' 9' der Endlosbänder 3, 9 zur weiteren Anpressung des einlaufenden Vlieses vorgesehen sein. Dies gilt auch für die Fig. 1, wo diese Walze 15 ebenfalls fakultativ dargestellt ist. 3, the deflection rollers 13, 14 are somewhat apart arranged away in the holding frame, the roller 13 is replaced by the deflection roller 11, and the nozzle unit 2 ", 2 '' 'are arranged between these deflecting rollers 14, 11. A further deflection roller 15 can the roller 14 above the runs 3 '9' Endless belts 3, 9 are provided for further pressing of the incoming fleece his. This also applies to FIG. 1, where this roller 15 is also shown optionally.

    In der Fig. 4 ist auf die Bänder-Unterstützungswalze 5 verzichtet, so dass die Vorrichtung etwas kompakter gebaut werden kann.In Fig. 4, the belt support roller 5 is dispensed with, so that the device can be built a bit more compact.

    In allen Ausführungsbeispielen ist der Kompaktiereinheit 1 ein weiterer Düsenbalken 16 mit Absaugung 16' zugeordnet, der für das frei auf dem ersten Endlosband 3' liegende genetzte Vlies zur unmittelbaren Vernadelung vorgesehen ist. Vorher ist also das obere zweite Endlosband 9 nach oben abgelenkt, so dass das Vlies oben nicht weiter abgedeckt ist. Der Düsenbalken 16 sollte auf jeden Fall noch dem ersten Endlosband 3 zugeordnet sein, damit das Vlies vor der Abnahme vom Band 3 eine größere Festigkeit hat. Weitere Vernadelungseinrichtungen 17 können folgen. Hier ist eine reine Bandvernadelung oder auch eine mit Vernadelungstrommeln möglich.In all exemplary embodiments, the compacting unit 1 is a further nozzle bar 16 associated with suction 16 ', that for the one lying freely on the first endless belt 3' wetted fleece is provided for immediate needling. So before that the upper second endless belt 9 is deflected upwards so that the fleece is not at the top is further covered. The nozzle bar 16 should definitely still be the first endless belt 3 be assigned so that the fleece is larger before removal from belt 3 Has firmness. Further needling devices 17 can follow. Here is one pure ribbon needling or also possible with needling drums.

    Claims (14)

    1. Apparatus for hydrodynamically charging a fibrous web (8) with a fluid for strengthening, preferably without bonding agents, the fibres of the fibrous web formed from natural and/or artificial fibres of any type, said apparatus comprising
      a) a first endless belt (3), which supports the fibrous web (8) and is guided and deflected in a tensioned manner between at least two rollers (6, 6', 6"),
      b) a second endless belt (9), which is also guided in a tensioned manner between at least two rollers (10, 11, 12, 12'), is associated with the first endless belt (3) and travels in the opposite direction, the working portion (9') of which second belt situated opposite the working portion (3') of the first endless belt (3) rotates in a driven manner in the same direction as the working portion (3') of the first endless belt (3), wherein
      c) the two working portions (3', 9') of the two endless belts (3, 9) at the inlet are orientated converging towards each other, when viewed with respect to their longitudinal extension, so that the fibrous web, lying on the working portion of the first endless belt, becomes increasingly compressed between the advancing endless belts,
      d) a first nozzle bar (2), which is associated with the two co-rotating endless belts (3, 9) in a region not supported by a guide roller, said nozzle bar being provided with possibly one suction means (2') for, for example, only wetting the fibrous web, and wherein
      e) the first endless belt (3) is pressed in the region of the first nozzle bar (2) by at least one additional guide roller (4, 5; 14) against the directly associated portion (9') of the second endless belt (9) for the more intensive compression of the two portions (3', 9'), which advance together, of the endless belts (3, 9).
    2. Apparatus for hydrodynamically charging a fibrous web (8) with a fluid for strengthening, preferably without bonding agents, the fibres of the fibrous web formed from natural and/or artificial fibres of any type, said apparatus comprising
      a) a first endless belt (3), which supports the fibrous web (8) and is guided and deflected in a tensioned manner between at least two rollers (6, 6', 6"),
      b) a second endless belt (9), which is also guided in a tensioned manner between at least two rollers (10, 11, 12, 12'), is associated with the first endless belt (3) and travels in the opposite direction, the working portion (9') of which second belt situated opposite the working portion (3') of the first endless belt (3) rotates in a driven manner in the same direction as the working portion (3') of the first endless belt (3), wherein
      c) the two working portions (3', 9') of the two endless belts (3, 9) at the inlet are orientated converging towards each other, when viewed with respect to their longitudinal extension, so that the fibrous web, lying on the working portion of the first endless belt, becomes increasingly compressed between the advancing endless belts,
      d) a first nozzle bar (2), which is associated with the two co-rotating endless belts (3, 9) in a region not supported by a guide roller, said nozzle bar being provided with possibly one suction means (2') for, for example, only wetting the fibrous web, and wherein
      f) [e)?]the second endless belt (9) is pressed in the region of the first nozzle bar (2) by at least one additional guide roller (11, 13, 15) against the directly associated portion (3') of the first endless belt (3) for the more intensive compression of the two endless belts (3, 9) which advance together.
    3. Apparatus according to claim 1 or 2, characterised in that this guide roller (4, 5, 11, 13, 14, 15) is displaced into the plane of the advancing portion (3', 9') in such a manner that a looping angle (α) of more than one degree, preferably 5 - 45 degrees, is produced at said roller for both endless belts (3, 9).
    4. Apparatus according to claims 1 - 3, characterised in that two of these additional guide rollers 4,5; 13,14; 11,14; 14,15) are provided for the better compression of the two endless belts (3, 9).
    5. Apparatus according to claim 4, characterised in that the first nozzle bar (2) is disposed between these additional guide rollers (4,5; 14,11; 13,11).
    6. Apparatus according to claim 4, characterised in that two additional guide rollers (4,15; 13,14; 14,15; 4,13) which are disposed one behind the other and have the two endless belts (3, 9) looped therearound in a serpent-like manner, are associated with the endless belts (3, 9) for the more intensive compression thereof.
    7. Apparatus according to claim 6, characterised in that the first nozzle bar (2) is disposed behind the two guide rollers (13,14; 14,15; 4,15; 4,13), when viewed with respect to the direction of conveyance.
    8. Apparatus according to one or more of claims 1 - 7, characterised in that two guide rollers 4, 5; 14,11; 4, 11) are directly associated with the nozzle bar (2).
    9. Apparatus according to claim 8, characterised in that the two guide rollers (4, 5) of the suction means (2') are therefore associated with the first endless belt (3) so as to support said belt upwardly.
    10. Apparatus according to claim 9, characterised in that the two guide rollers (4,15; 4,13) are disposed both on the upper side and on the underside of the two working portions (3', 9') of the endless belts (3, 9).
    11. Apparatus according to one of claims 9 - 10, characterised in that a third guide roller (13) or supporting roller is associated with the two guide rollers (4,5; 4,11) in the region of the nozzle bar (2).
    12. Apparatus according to one of claims 1 - 11, characterised in that the nozzle bar (2) is disposed vertically between and in the region of the guide rollers (4,5; 4,11).
    13. Apparatus according to one of claims 1 - 11, characterised in that the nozzle bar (2) is disposed inclinedly between and in the region of the guide rollers (11, 14).
    14. Apparatus according to one of claims 1 - 13, characterised in that an additional nozzle bar (16), with a possible suction means (16'), is directly associated with the first endless belt (3) after the second endless belt (9) has been discharged.
    EP01103216A 2000-02-15 2001-02-12 Device for hydraulically needling a fibrous web by projecting a fluid Revoked EP1126064B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10006763A DE10006763A1 (en) 2000-02-15 2000-02-15 Hydrodynamic consolidation of non-woven involves fluid jet treatment of non-woven while held between continuous conveying bands
    DE10006763 2000-02-15

    Publications (3)

    Publication Number Publication Date
    EP1126064A2 EP1126064A2 (en) 2001-08-22
    EP1126064A3 EP1126064A3 (en) 2002-09-04
    EP1126064B1 true EP1126064B1 (en) 2003-12-17

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP01103216A Revoked EP1126064B1 (en) 2000-02-15 2001-02-12 Device for hydraulically needling a fibrous web by projecting a fluid

    Country Status (3)

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    US (1) US6412155B2 (en)
    EP (1) EP1126064B1 (en)
    DE (2) DE10006763A1 (en)

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    DE102010009275A1 (en) 2010-02-25 2011-08-25 Trützschler Nonwovens GmbH, 63329 Device for solidifying a material web
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    DE102009017729A1 (en) 2009-04-11 2010-10-14 Fleissner Gmbh Device for strengthening material web made of fibers and/or filaments, comprises first and second endless belts tightly revolving around deflection rollers carrying the web, where second endless belt counter-rotates to first endless belt
    DE102009032343A1 (en) 2009-07-09 2011-01-20 Fleissner Gmbh Und Co. Device for solidifying material web made of fiber and/or filaments, comprises filter band, girder duct for fluidic application of material web, and device for compressing fibers and filaments of material web
    DE102010009275A1 (en) 2010-02-25 2011-08-25 Trützschler Nonwovens GmbH, 63329 Device for solidifying a material web
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    EP4067548B1 (en) 2021-03-29 2023-03-22 Andritz Küsters GmbH System for consolidating layers comprising fibres to a nonwoven web

    Also Published As

    Publication number Publication date
    EP1126064A2 (en) 2001-08-22
    EP1126064A3 (en) 2002-09-04
    US6412155B2 (en) 2002-07-02
    DE50101160D1 (en) 2004-01-29
    US20010027594A1 (en) 2001-10-11
    DE10006763A1 (en) 2001-08-16

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