EP1870499A2 - Cross-lapper - Google Patents

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Publication number
EP1870499A2
EP1870499A2 EP07012112A EP07012112A EP1870499A2 EP 1870499 A2 EP1870499 A2 EP 1870499A2 EP 07012112 A EP07012112 A EP 07012112A EP 07012112 A EP07012112 A EP 07012112A EP 1870499 A2 EP1870499 A2 EP 1870499A2
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EP
European Patent Office
Prior art keywords
fiber composite
belt
deflection point
fleece
cover
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Granted
Application number
EP07012112A
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German (de)
French (fr)
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EP1870499B1 (en
EP1870499A3 (en
Inventor
Erwin Koch
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Truetzschler Nonwovens GmbH
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Erko Truetzschler GmbH
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Publication of EP1870499A2 publication Critical patent/EP1870499A2/en
Publication of EP1870499A3 publication Critical patent/EP1870499A3/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G25/00—Lap-forming devices not integral with machines specified above

Definitions

  • the invention relates to a stacker according to the preamble of claim 1.
  • the restoring forces of the fibers cause them to rise again from their initially compressed orientation so that the fiber composite "recovers" from the compressive stress and takes in air again.
  • This air entrapment as well as the centrifugal forces acting on the fiber composite at the deflection point cause the fabric of the fiber composite to set up at the first deflection point, so that the undesired formation of bubbles or wrinkles occurs. If uncontrolled distortions of the fiber composite then occur, the weak, very loose cohesion of the batt or fiber fleece can be destroyed and the fiber composite torn.
  • a crosslapper according to the preamble of claim 1 is known, which can be referred to with its horizontal depositing device as a so-called Flachtäfler.
  • the fiber composite is transported between an infeed belt and a cover strip up to a first deflection point in order to be able to transport and stretch the fiber composite in this way.
  • the design of the cover is not explained in detail.
  • the invention has for its object to improve a generic crosslapper to the effect that this ensures the gentlest possible and controlled handling of the fiber composite and prevents the formation of bubbles or wrinkles at the first deflection as reliable as possible.
  • the invention proposes to press the air in a controlled manner from the fiber composite by the masking tape leads the fiber composite under pressure. This venting takes place until the fiber composite reaches the first deflection, so that the time required for a recovery of the fiber composite due to the restoring forces of the individual fibers, the fiber composite is not available.
  • the cover allows a leading away from the fiber composite air transport through the masking tape.
  • z. B. by the fibers are separated by the air, which escapes between two closed transport and Abdeckb skilledn.
  • a closed conveyor belt and a venting possible, z. B. perforated masking tape may be provided.
  • the incoming from the carding batt may, as proposed, go through the dynamic movements of the designed as a wagon or as a repeater Kreuzlegers unchanged, so without unwanted compression, stretching or wrinkling.
  • the fiber composite is according to the proposal still vented immediately before the first deflection, so that caused by the air entrapment such as blistering or wrinkling can not occur and accordingly the fiber composite can be deflected undisturbed. Since the fiber composite is covered by a masking tape, the vent can easily be flat and over a longer distance of the fiber composite during its transport on the infeed belt, and not just linear as by means of a pressure roller.
  • the masking tape can be provided on only a comparatively short distance before the first deflection point, if this is sufficient for the desired ventilation of the fiber composite, to lead these easily around the first deflection point to be able to.
  • it can be provided to cover the fiber composite over a long distance with a masking tape, so that particularly high belt speeds are possible without destroying the fiber composite by air turbulence, so that the fiber composite optimally protected between a conveyor belt - like the inlet belt - and the cover strip is.
  • the cover strip can assist deflection of the fiber composite that is as gentle as possible on the material by the cover strip either following the first deflection point over part of its circumference.
  • it can be repeatedly guided to the first deflection point, for example several times to the circumference of a deflection roller, for example by means of a plurality of deflection rollers.
  • the fiber composite may be advantageous to cover the fiber composite not only up to and at the first deflection point, but on its way through the stacker over large sections of the path or even as completely as possible.
  • the arrangement of one or more further masking tapes and / or pressure rollers may be provided.
  • these other masking tapes may have corresponding air channels, for example, designed as a screen belts, but also the pressure rollers may have air channels, for example, be perforated.
  • the problem could exist that the air trapped between the infeed belt and the cover strip forces the fiber composite apart and destroys the structure of the fiber composite required for correct placement of the fiber composite. Provisional is therefore provided that the cover reliably allows the venting of the fiber composite. It may be provided for this purpose with air channels that allow a leading away from the fiber composite air transport through the masking tape. For thicker masking the air transport can be done, for example, within the cover, for example, to lateral outlet openings.
  • the desired pressure forces on the fiber composite enabling and economically producible cover band can be advantageously designed as a wire, ie with air channels that extend across the surface of the cover strip and only so long how the masking tape is thick.
  • a voluminous fiber composite may be provided to achieve higher contact forces, make the cover strip obliquely against the inlet belt, so that the fiber composite is guided in a wedge-shaped gap between the inlet belt and masking tape and is continuously vented more.
  • a stacker is generally designated by 1, wherein a fiber composite 2 is fed as a ribbon-shaped sheet from a card as a nonwoven or batt to the cross stacker 1.
  • a first pressure roller 3 the direction of movement of the fiber composite 2 is deflected and at the same time air is forced out of the fiber composite.
  • the fiber composite 2 passes via an infeed conveyor 4 to a first deflection point 5 of the crosslapper 1.
  • the first deflection point 5 upstream and zooming to this first deflection point 5 a designed as a screen cover band 6 is provided which the ventilation of the fiber composite 2 to the deflection point. 5 ensures.
  • the cover strip 6 extends adjacent to the fiber composite 2 almost from the first pressure roller 3 to the first deflection point 5.
  • the infeed belt 4 is angled in front of the first deflection point 5, so that the cover strip 6 in this last, angled region of the inlet belt 4 before the first deflection point 5 the wedge belt 4 can be supplied wedge-shaped and a steadily decreasing gap causes, in which the fiber composite 2 is guided, so that the fiber composite 2 is continuously vented more within this gap until it reaches the first deflection point 5.
  • the fiber composite 2 to vent and occurring at these deflection 5 centrifugal forces acting on the fiber composite counteract, so that the composite of the individual fibers within the fiber composite 2 as undisturbed remains and the formation of bubbles or wrinkles in the region of the first deflection point 5 is reliably avoided.
  • pressure rollers 8 are provided, which also serve as deflection rollers to guide the cover strip 6 and a possibly further, lower cover strip 9.
  • the region of the first deflection point 5 is in the embodiment of Fig. 1 laterally movable back and forth, ie in the longitudinal direction of the fiber composite 2.
  • the fiber composite 2 runs from this first deflection point 5 to a storage location 10, which, as can be seen from the arrows , Is also mounted to move back and forth so that they can store the fiber composite 2 on a conveyor belt which is transverse to the inlet belt 4 and transverse to the paper plane of Fig. 1, so that the fiber composite 2 is folded zigzag folded on this conveyor belt, not shown in the drawings.
  • this second storage location 10 always leads and lags constantly in comparison to the speed of the infeed belt 4, the lateral mobility of the first deflection point 5 serves to prevent otherwise occurring loosening or tensile stresses in the fiber composite 2 due to this advance and lagging of the storage location.
  • pulleys 11 can be arranged in the region of this storage location 10 so that they cause there as a pressure rollers there is a venting of the fiber composite 2, where the fiber composite is guided in a curve.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • De-Stacking Of Articles (AREA)

Abstract

One belt (6) runs over the fleece or other fibrous composite (2) fed in, making contact with it. A further intake belt (4), runs in the same direction under the fleece (2). These belts work together, feeding the fleece and exerting pressure against it. The top belt (6) precedes the first deflection point (5) and rests on the fleece right up to it (5). The cover belt (6) is permeable to air from the fleece, which passes through it (6). The cover belt is driven at a different velocity from the inlet belt, such that the fleece is stretched or compressed. Pressure components are provided at the first deflection point. These extract air from the fleece against which they rest, causing mechanical pressure to be exerted upon them. They are air-permeable pressure rollers (8). They are formed by the cover belt itself, which is led around part of the circumference at the first deflection point. There may be several other belt (6) deflections with returns back to the first deflection point. The cover belt includes air channels and/or is constructed as a sieve belt.

Description

Die Erfindung betrifft einen Kreuzleger nach dem Oberbegriff des Anspruchs 1.The invention relates to a stacker according to the preamble of claim 1.

Kreuzleger sind aus der Praxis bekannt. Sie werden dort eingesetzt, wo ein zunächst erzeugter Faserverbund, der beispielsweise als Flor oder als Vlies ausgestaltet sein kann, platzsparend gefaltet werden soll. Hierzu wird der Faserverbund mittels eines Einlaufbandes dem Kreuzleger zugeführt, wobei quer zu diesem Einlaufband ein weiteres Transportband verläuft. Der Kreuzleger legt den Faserverbund auf diesem Transportband ab. Dabei erfolgt eine Relativbewegung zwischen dem Kreuzleger und dem Transportband, so dass kontinuierlich, während das Transportband läuft, der Faserverbund zickzack-artig auf dem Transportband abgelegt wird. Die bekannten Kreuzleger können als Wagenleger ausgestaltet sein oder als Bandleger.Kreuzleger are known from practice. They are used where an initially produced fiber composite, which can be designed, for example, as a pile or as a nonwoven, is to be folded in a space-saving manner. For this purpose, the fiber composite is fed by means of an infeed belt to the stacker, which extends transversely to this inlet belt another conveyor belt. The cross stacker places the fiber composite on this conveyor belt. In this case, there is a relative movement between the stacker and the conveyor belt, so that continuously, while the conveyor belt is running, the fiber composite is zigzag-like stored on the conveyor belt. The known cross-stackers can be configured as a trolley or as a repeater.

Dabei ist es aus der Praxis bekannt, den von einer Krempel gespeisten Faserverbund lose auf dem Einlaufband aufliegend in den Kreuzleger einzubringen. Mit zunehmend höheren Bandlaufgeschwindigkeiten ergibt sich zunehmend das Problem, dass unerwünschte Faltenbildungen insbesondere dort auftreten können, wo der Faserverbund umgelenkt wird. Um dem zu begegnen ist es bekannt, die im Vlies bzw. Flor eingeschlossene Luft aus dem Faserverbund herauszudrücken. Hierzu sind aufliegende bzw. anstellbare Walzen vorgesehen, die glatte oder perforierte Oberflächen aufweisen können und welche eingeschlossene Luft aus dem Faserverbund herausdrücken.It is known from practice to introduce the fed by a carding fiber composite loosely on the infeed belt resting in the crosslapper. With increasingly higher belt speeds, the problem increasingly arises that undesirable wrinkling can occur, in particular, where the fiber composite is deflected. To meet that It is known to push out the air trapped in the fleece or pile from the fiber composite. For this purpose, resting or adjustable rollers are provided, which may have smooth or perforated surfaces and which press out trapped air from the fiber composite.

Auf dem weiteren Weg über das Einlaufband bis zur ersten Umlenkstelle des Kreuzlegers bewirken jedoch die Rückstellkräfte der Fasern, dass diese sich aus ihrer zunächst zusammengepressten Ausrichtung wieder aufrichten, so dass der Faserverbund von der Druckbeanspruchung "erholt" und wieder Luft aufnimmt. Dieser Lufteinschluss sowie die an der Umlenkstelle auf den Faserverbund einwirkenden Fliehkräfte bewirken, dass sich das Flächengebilde des Faserverbundes an der ersten Umlenkstelle aufstellt, so dass die unerwünschte Blasen- oder Faltenbildung erfolgt. Treten dann noch unkontrollierte Verzüge des Faserverbundes auf, kann der schwache, sehr lockere Zusammenhalt des Faserflors bzw. Faservlieses zerstört werden und der Faserverbund einreißen.On the way through the infeed belt to the first deflection point of the cross stacker, however, the restoring forces of the fibers cause them to rise again from their initially compressed orientation so that the fiber composite "recovers" from the compressive stress and takes in air again. This air entrapment as well as the centrifugal forces acting on the fiber composite at the deflection point cause the fabric of the fiber composite to set up at the first deflection point, so that the undesired formation of bubbles or wrinkles occurs. If uncontrolled distortions of the fiber composite then occur, the weak, very loose cohesion of the batt or fiber fleece can be destroyed and the fiber composite torn.

Aus der EP 1 136 600 A1 ist ein Kreuzleger nach dem Oberbegriff des Anspruchs 1 bekannt, der mit seiner horizontalen Ablegevorrichtung auch als sogenannter Flachtäfler bezeichnet werden kann. Der Faserverbund wird zwischen einem Einlaufband und einem Abdeckband bis zu einer ersten Umlenkstelle transportiert, um den Faserverbund auf diese Weise sowohl transportieren als auch strecken zu können. Die Ausgestaltung des Abdeckbandes ist nicht näher erläutert.From the EP 1 136 600 A1 a crosslapper according to the preamble of claim 1 is known, which can be referred to with its horizontal depositing device as a so-called Flachtäfler. The fiber composite is transported between an infeed belt and a cover strip up to a first deflection point in order to be able to transport and stretch the fiber composite in this way. The design of the cover is not explained in detail.

Aus der DE 102 50 089 A1 ist ein gattungsfremder Kreuzleger bekannt. Dieser weist keine horizontale Ablegevorrichtung wie ein Flachtäfler auf, sondern ist als Steilarm-Vliesleger ausgestaltet, mit einem aufwärts gerichteten Zuführarm, einem Gelenk, und einem abwärts gerichteten Legearm. Vom unteren Ende des Legearms wird der Faserverbund auf ein Abzugsband abgelegt, wobei die gelenkige Ausgestaltung des Steilarm-Vlieslegers eine ständig pendelnde Hin- und Her- Bewegung ermöglicht, um den Faserverbund über die gewünschte Breite auf dem Abzugsband abzulegen. Bei der erwähnten Pendelbewegung werden die Zuführ- und Legearme in abwechselnd unterschiedlichen Richtungen zueinander um das erwähnte Gelenk verschwenkt. Um bei dieser Pendelbewegung Streckungen und Stauchungen des Faserverbundes zu vermeiden, werden drei alternative Ausgestaltungen des Steilarm-Vliesleger vorgeschlagen um jeweils den Faserverbund sicher am Band zu halten und Relativbewegungen zwischen Faserverbund und Flortransportband zu vermeiden:

  1. 1. Der Faserverbund wird zwischen einem Flortransportband und einem Andruckband geführt. Die Ausgestaltung der beiden Bänder ist nicht näher erläutert.
  2. 2. Auf beiden Armen des Steilarm-Vlieslegers ist das Flortransportband als Siebband ausgestaltet, welches rückseitig besaugt wird, so dass auf ein Andruckband verzichtet werden kann.
  3. 3. Der Faserverbund wird zwischen einer glatten Unterlage und einem Andruckband geführt. Die glatte Unterlage ist gewölbt, so dass das Andruckband in sicherer Anlage an der Unterlage gehalten wird und der Faserverbund entsprechend sicher geführt, nämlich geklemmt wird. Die Ausgestaltung des Andruckbandes ist nicht näher erläutert.
From the DE 102 50 089 A1 is a generic stalwart known. It does not have a horizontal laying device such as a flat saw, but is designed as a low arm leveler, with an upwardly directed feed arm, a hinge, and a down-facing laying arm. From the lower end of the laying arm, the fiber composite is deposited on a draw-off belt, wherein the articulated configuration of the low-pile fleece laying a constantly oscillating back and forth movement allows to lay the fiber composite over the desired width on the discharge belt. In the aforementioned pendulum motion, the supply and laying arms are pivoted in alternately different directions to each other about the said joint. In order to avoid stretching and buckling of the fiber composite during this oscillating movement, three alternative embodiments of the steep-arm nonwoven layer are proposed in order to securely hold the fiber composite to the belt and to prevent relative movements between the fiber composite and the belt conveyor belt:
  1. 1. The fiber composite is guided between a pile conveyor belt and a pressure belt. The design of the two bands is not explained in detail.
  2. 2. On both arms of the steep-arm fleece layer, the pile conveyor belt is designed as a screen belt, which is vacuumed on the back, so that it is possible to dispense with a pressure belt.
  3. 3. The fiber composite is guided between a smooth base and a pressure belt. The smooth surface is curved, so that the pressure belt is held in secure contact with the surface and the fiber composite accordingly performed safe, namely is clamped. The design of the pressure belt is not explained in detail.

Der Erfindung liegt die Aufgabe zugrunde, einen gattungsgemäßen Kreuzleger dahingehend zu verbessern, dass dieser eine möglichst schonende und kontrollierte Handhabung des Faserverbundes sicherstellt und die Bildung von Blasen oder Falten am ersten Umlenkpunkt möglichst zuverlässig verhindert.The invention has for its object to improve a generic crosslapper to the effect that this ensures the gentlest possible and controlled handling of the fiber composite and prevents the formation of bubbles or wrinkles at the first deflection as reliable as possible.

Diese Aufgabe wird durch einen Kreuzleger mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a stacker with the features of claim 1.

Die Erfindung schlägt mit anderen Worten vor, die Luft kontrolliert aus dem Faserverbund zu pressen, indem das Abdeckband den Faserverbund unter Druck führt. Diese Entlüftung erfolgt so lange, bis der Faserverbund an die erste Umlenkstelle gelangt, so dass die Zeit, die für eine Erholung des Faserverbundes aufgrund der Rückstellkräfte der einzelnen Fasern erforderlich ist, dem Faserverbund nicht zur Verfügung steht. Dabei ist vorschlagsgemäß vorgesehen, dass das Abdeckband einen vom Faserverbund weg führenden Lufttransport durch das Abdeckband hindurch ermöglicht. Im Gegensatz zu einem geschlossenen Abdeckband ist somit sichergestellt, dass die vom Faserverbund entweichende Luft nicht zu einer Schädigung des Faserverbundes führt, z. B. indem die Fasern durch die Luft, welche zwischen zwei geschlossenen Transport- und Abdeckbändern entweicht, auseinander getrieben werden. Insbesondere kann ein geschlossenes Transportband und ein die Entlüftung ermöglichendes, z. B. gelochtes Abdeckband vorgesehen sein. Der von der Krempel einlaufende Faserflor kann vorschlagsgemäß die dynamisch ablaufenden Bewegungen des als Wagenleger oder als Bandleger ausgestalteten Kreuzlegers unverändert durchlaufen, also ohne ungewollte Stauchungen, Streckungen oder Faltenbildungen.In other words, the invention proposes to press the air in a controlled manner from the fiber composite by the masking tape leads the fiber composite under pressure. This venting takes place until the fiber composite reaches the first deflection, so that the time required for a recovery of the fiber composite due to the restoring forces of the individual fibers, the fiber composite is not available. It is proposed by the proposal that the cover allows a leading away from the fiber composite air transport through the masking tape. In contrast to a closed masking tape is thus ensured that the air escaping from the fiber composite does not lead to damage to the fiber composite, z. B. by the fibers are separated by the air, which escapes between two closed transport and Abdeckbändern. In particular, a closed conveyor belt and a venting possible, z. B. perforated masking tape may be provided. The incoming from the carding batt may, as proposed, go through the dynamic movements of the designed as a wagon or as a repeater Kreuzlegers unchanged, so without unwanted compression, stretching or wrinkling.

Der Faserverbund wird vorschlagsgemäß noch unmittelbar vor der ersten Umlenkstelle entlüftet, so dass die durch den Lufteinschluss verursachten Störungen wie Blasenbildung oder Faltenbildung nicht auftreten können und dementsprechend der Faserverbund ungestört umgelenkt werden kann. Da der Faserverbund mittels eines Abdeckbandes abgedeckt wird, kann die Entlüftung problemlos flächig und über eine längere Wegstrecke des Faserverbundes während seines Transports auf dem Einlaufband erfolgen, und nicht nur linear wie mittels eine Andruckwalze.The fiber composite is according to the proposal still vented immediately before the first deflection, so that caused by the air entrapment such as blistering or wrinkling can not occur and accordingly the fiber composite can be deflected undisturbed. Since the fiber composite is covered by a masking tape, the vent can easily be flat and over a longer distance of the fiber composite during its transport on the infeed belt, and not just linear as by means of a pressure roller.

Das Abdeckband kann auf einer lediglich vergleichsweise kurzen Wegstrecke vor der ersten Umlenkstelle vorgesehen sein, falls dies für die gewünschte Entlüftung des Faserverbundes ausreicht, um diesen problemlos um die erste Umlenkstelle führen zu können. Alternativ kann vorgesehen sein, den Faserverbund über eine lange Wegstrecke mit einem Abdeckband abzudecken, so dass besonders hohe Bandgeschwindigkeiten möglich werden, ohne durch Luftverwirbelungen den Faserverbund zu zerstören, so dass der Faserverbund optimal geschützt zwischen einem Transportband - wie dem Einlaufband - und dem Abdeckband geführt ist.The masking tape can be provided on only a comparatively short distance before the first deflection point, if this is sufficient for the desired ventilation of the fiber composite, to lead these easily around the first deflection point to be able to. Alternatively, it can be provided to cover the fiber composite over a long distance with a masking tape, so that particularly high belt speeds are possible without destroying the fiber composite by air turbulence, so that the fiber composite optimally protected between a conveyor belt - like the inlet belt - and the cover strip is.

An der ersten Umlenkstelle kann das Abdeckband entsprechend einer besonders bevorzugten Ausgestaltung des vorliegenden Vorschlags eine möglichst materialschonende Umlenkung des Faserverbundes unterstützen, indem das Abdeckband entweder der ersten Umlenkstelle über einen Teil ihres Umfangs folgt. Alternativ dazu oder auch ergänzend dazu kann es - beispielsweise mittels mehrerer Umlenkrollen - mehrfach an die erste Umlenkstelle herangeführt werden, beispielsweise mehrfach an den Umfang einer Umlenkrolle. Durch diese unterstützende Anlage des Abdeckbandes wird nicht nur der Halt des Faserverbundes an der ersten Umlenkeinrichtung verbessert, sondern durch den Anlagedruck wird auch die zuvor erfolgte, vorteilhafte Entlüftung des Faserverbundes aufrechterhalten.In accordance with a particularly preferred embodiment of the present proposal, at the first deflection point, the cover strip can assist deflection of the fiber composite that is as gentle as possible on the material by the cover strip either following the first deflection point over part of its circumference. Alternatively or in addition to this, it can be repeatedly guided to the first deflection point, for example several times to the circumference of a deflection roller, for example by means of a plurality of deflection rollers. By this supporting system of the cover not only the support of the fiber composite is improved at the first deflection, but by the system pressure is also maintained before the beneficial ventilation of the fiber composite maintained.

Zudem kann vorteilhaft vorgesehen sein, den Faserverbund nicht nur bis und an der ersten Umlenkstelle, sondern auf seinem Weg durch den Kreuzleger über große Wegabschnitte oder sogar möglichst vollständig abzudecken. Hierzu kann außer dem vorerwähnten Abdeckband, welches dem Einlaufband zugeordnet ist, die Anordnung eines oder mehrerer weiterer Abdeckbänder und / oder Andruckrollen vorgesehen sein.In addition, it may be advantageous to cover the fiber composite not only up to and at the first deflection point, but on its way through the stacker over large sections of the path or even as completely as possible. For this purpose, in addition to the aforementioned masking tape, which is associated with the infeed belt, the arrangement of one or more further masking tapes and / or pressure rollers may be provided.

Um eine intensive Entlüftung zu ermöglichen und das Eintragen von äußerer Luft in den Faserverbund zu vermeiden, können nicht nur diese weiteren Abdeckbänder entsprechende Luftkanäle aufweisen, beispielsweise als Siebbänder ausgestaltet sein, sondern auch die Andruckrollen können Luftkanäle aufweisen, beispielsweise perforiert sein.In order to allow intensive ventilation and to avoid the entry of external air in the fiber composite, not only these other masking tapes may have corresponding air channels, for example, designed as a screen belts, but also the pressure rollers may have air channels, for example, be perforated.

Bei Verwendung eines geschlossenen Abdeckbandes könnte das Problem bestehen, dass die zwischen dem Einlaufband und dem Abdeckband eingeschlossene Luft den Faserverbund auseinander treibt und die für eine korrekte Ablage des Faserverbundes erforderliche Struktur des Faserverbundes zerstört. Vorschlagsgemäße ist daher vorgesehen, dass das Abdeckband zuverlässig die Entlüftung des Faserverbunds ermöglicht. Es kann hierzu mit Luftkanälen versehen sein, die einen vom Faserverbund weg führenden Lufttransport durch das Abdeckband hindurch ermöglichen. Bei dickeren Abdeckbändern kann der Lufttransport beispielsweise innerhalb des Abdeckbandes erfolgen, beispielsweise zu seitlichen Austrittsöffnungen.When using a closed masking tape, the problem could exist that the air trapped between the infeed belt and the cover strip forces the fiber composite apart and destroys the structure of the fiber composite required for correct placement of the fiber composite. Provisional is therefore provided that the cover reliably allows the venting of the fiber composite. It may be provided for this purpose with air channels that allow a leading away from the fiber composite air transport through the masking tape. For thicker masking the air transport can be done, for example, within the cover, for example, to lateral outlet openings.

Besonders einfach, mit möglichst kurzen Strömungswegen für die Luft besonders entlüftungswirksam, die gewünschten Andruckkräfte auf den Faserverbund ermöglichend und wirtschaftlich herstellbar kann das Abdeckband vorteilhaft als Siebband ausgestaltet sein, also mit Luftkanälen, die sich quer durch die Fläche des Abdeckbandes erstrecken und nur so lang sind, wie das Abdeckband dick ist. Hierdurch ist zuverlässig sichergestellt, dass auch bei schnell laufenden Bändern eine wirksame Entlüftung möglich ist und sowohl die zwischen den beiden Bändern, nämlich dem Einlaufband und dem Abdeckband, als auch die im Faserverbund selbst enthaltene Luft abgeführt werden kann.Particularly simple, with the shortest possible flow paths for the air particularly effective for ventilation, the desired pressure forces on the fiber composite enabling and economically producible cover band can be advantageously designed as a wire, ie with air channels that extend across the surface of the cover strip and only so long how the masking tape is thick. As a result, it is reliably ensured that effective ventilation is possible even with high-speed belts and that both the air contained in the fiber composite itself and between the two belts, namely the infeed belt and the cover belt, can be removed.

Bei einem voluminösen Faserverbund kann zur Erzielung höherer Anpresskräfte vorgesehen sein, das Abdeckband schräg gegenüber dem Einlaufband anzustellen, so dass der Faserverbund in einen keilförmigen Spaltraum zwischen Einlaufband und Abdeckband geführt wird und kontinuierlich stärker entlüftet wird.In a voluminous fiber composite may be provided to achieve higher contact forces, make the cover strip obliquely against the inlet belt, so that the fiber composite is guided in a wedge-shaped gap between the inlet belt and masking tape and is continuously vented more.

Dabei kann vorteilhaft eine Abwinklung des Einlaufbandes in seinem der ersten Umlenkstelle nahen Bereich vorgesehen sein, um problemlos die Schrägführung des Abdeckbandes mittels Umlenkrollen und dergleichen zu ermöglichen.In this case, it is advantageous to provide an angling of the infeed belt in its region near the first deflection point, in order to permit the inclined guidance of the cover belt by means of deflecting rollers and the like without any problems.

Durch die Einstellung der Laufgeschwindigkeit des Abdeckbandes im Vergleich zur Laufgeschwindigkeit des Transportbandes - wie z. B. des Einlaufbandes - kann innerhalb des Kreuzlegers eine bewusste Stauchung oder auch Streckung des Faserverbundes bewirkt werden, je nach Materialqualität des Faserverbundes und den individuellen konstruktiven Gegebenheiten des Kreuzlegers, so dass eine optimale Behandlung des Faserverbundes zur Erzielung einer gewünschten, am Ende des Kreuzlegers vorliegenden Materialqualität des Faserverbundes ermöglicht wird.By adjusting the speed of the cover strip in comparison to the speed of the conveyor belt - such. B. of the infeed belt - can be caused within the Kreuzlegers a deliberate compression or stretching of the fiber composite, depending on the material quality of the fiber composite and the individual structural conditions of the Kreuzlegers, so that an optimal treatment of the fiber composite to achieve a desired, present at the end of the Kreuzlegers Material quality of the fiber composite is made possible.

Die Erfindung wird anhand der rein schematischen Darstellungen nachfolgend näher erläutert. Dabei zeigen die
Fig. 1 - 3 unterschiedliche Ausführungsbeispiele von Kreuzlegern.The invention will be explained in more detail below with reference to the purely schematic illustrations. The show
Fig. 1-3 different embodiments of Kreuzlegern.

In den Zeichnungen ist jeweils mit 1 insgesamt ein Kreuzleger bezeichnet, wobei ein Faserverbund 2 als bandförmiges Flächengebilde von einer Krempel als Faservlies oder Faserflor zum Kreuzleger 1 zugeführt wird. Im Bereich einer ersten Anpressrolle 3 wird die Bewegungsrichtung des Faserverbundes 2 umgelenkt und gleichzeitig Luft aus dem Faserverbund herausgedrückt. Anschließend gelangt der Faserverbund 2 über ein Einlaufband 4 zu einer ersten Umlenkstelle 5 des Kreuzlegers 1. Der ersten Umlenkstelle 5 vorgelagert und bis an diese erste Umlenkstelle 5 heranreichend ist ein als Siebband ausgestaltetes Abdeckband 6 vorgesehen, welches die Entlüftung des Faserverbundes 2 bis zur Umlenkstelle 5 sicherstellt.In the drawings, a stacker is generally designated by 1, wherein a fiber composite 2 is fed as a ribbon-shaped sheet from a card as a nonwoven or batt to the cross stacker 1. In the region of a first pressure roller 3, the direction of movement of the fiber composite 2 is deflected and at the same time air is forced out of the fiber composite. Subsequently, the fiber composite 2 passes via an infeed conveyor 4 to a first deflection point 5 of the crosslapper 1. The first deflection point 5 upstream and zooming to this first deflection point 5 a designed as a screen cover band 6 is provided which the ventilation of the fiber composite 2 to the deflection point. 5 ensures.

Bei den Ausführungsbeispielen der Fig. 1 und 3 verläuft das Abdeckband 6 dem Faserverbund 2 anliegend nahezu von der ersten Anpressrolle 3 bis zur ersten Umlenkstelle 5.In the embodiments of FIGS. 1 and 3, the cover strip 6 extends adjacent to the fiber composite 2 almost from the first pressure roller 3 to the first deflection point 5.

Bei dem Ausführungsbeispiel der Fig. 2 ist das Einlaufband 4 vor der ersten Umlenkstelle 5 abgewinkelt, so dass das Abdeckband 6 in diesem letzten, abgewinkelten Bereich des Einlaufbandes 4 vor der ersten Umlenkstelle 5 dem Einlaufband 4 keilförmig zugeführt werden kann und einen sich stetig verringernden Spalt bewirkt, in welchen der Faserverbund 2 hineingeführt wird, so dass der Faserverbund 2 innerhalb dieses Spaltes kontinuierlich stärker entlüftet wird, bis er an die erste Umlenkstelle 5 gelangt.In the embodiment of FIG. 2, the infeed belt 4 is angled in front of the first deflection point 5, so that the cover strip 6 in this last, angled region of the inlet belt 4 before the first deflection point 5 the wedge belt 4 can be supplied wedge-shaped and a steadily decreasing gap causes, in which the fiber composite 2 is guided, so that the fiber composite 2 is continuously vented more within this gap until it reaches the first deflection point 5.

Aufgrund der Abwinklung des Einlaufbandes 4 ist oberhalb des horizontal verlaufenden Abschnitts des Einlaufbandes 4 ausreichend Bauraum vorhanden, um das Abdeckband 6 über Umlenkrollen 7 so zu führen, dass es im abgewinkelten Bereich des Einlaufbandes 4 diesem Einlaufband 4 schräg und mit immer geringerem Abstand angenähert werden kann.Due to the angling of the infeed belt 4, there is sufficient space above the horizontally extending section of the infeed belt 4 to guide the cover belt 6 over deflecting rollers 7 so that it can approach this infeed belt 4 at an angle and with an ever smaller distance in the angled region of the infeed belt 4 ,

Auch im Bereich der ersten Umlenkstelle 5 selbst ist bei den dargestellten Ausführungsbeispielen vorgesehen, den Faserverbund 2 zu entlüften und an diesen Umlenkstellen 5 auftretenden Fliehkräften, die auf den Faserverbund 2 einwirken, entgegenzuwirken, so dass der Verbund der einzelnen Fasern innerhalb des Faserverbundes 2 möglichst ungestört bleibt und die Bildung von Blasen oder Falten im Bereich der ersten Umlenkstelle 5 zuverlässig vermieden wird. Zu diesem Zweck sind Andruckrollen 8 vorgesehen, die gleichzeitig auch als Umlenkrollen dienen, um das Abdeckband 6 und ein ggf. weiteres, unteres Abdeckband 9 zu führen.Also in the area of the first deflection point 5 itself is provided in the illustrated embodiments, the fiber composite 2 to vent and occurring at these deflection 5 centrifugal forces acting on the fiber composite 2, counteract, so that the composite of the individual fibers within the fiber composite 2 as undisturbed remains and the formation of bubbles or wrinkles in the region of the first deflection point 5 is reliably avoided. For this purpose, pressure rollers 8 are provided, which also serve as deflection rollers to guide the cover strip 6 and a possibly further, lower cover strip 9.

Der Bereich der ersten Umlenkstelle 5 ist bei dem Ausführungsbeispiel der Fig. 1 seitlich hin und her beweglich gelagert, also in Längsrichtung des Faserverbundes 2. Der Faserverbund 2 läuft von dieser ersten Umlenkstelle 5 zu einer Ablagestelle 10, die, wie aus den Pfeilen ersichtlich ist, ebenfalls hin und her beweglich gelagert ist, so dass sie den Faserverbund 2 auf einem Transportband ablegen kann, welches quer zum Einlaufband 4 und quer zur Papierebene der Fig. 1 verläuft, so dass der Faserverbund 2 auf diesem in den Zeichnungen nicht dargestellten Transportband zickzack-mäßig gefaltet abgelegt wird. Da diese zweite Ablagestelle 10 im Vergleich zur Geschwindigkeit des Einlaufbandes 4 ständig wechselnd voreilt und nacheilt, dient die seitliche Beweglichkeit der ersten Umlenkstelle 5 dazu, durch dieses Vor- und Nacheilen der Ablagestelle 10 ansonsten entstehende Lockerungen bzw. Zugbeanspruchungen im Faserverbund 2 zu vermeiden.The region of the first deflection point 5 is in the embodiment of Fig. 1 laterally movable back and forth, ie in the longitudinal direction of the fiber composite 2. The fiber composite 2 runs from this first deflection point 5 to a storage location 10, which, as can be seen from the arrows , Is also mounted to move back and forth so that they can store the fiber composite 2 on a conveyor belt which is transverse to the inlet belt 4 and transverse to the paper plane of Fig. 1, so that the fiber composite 2 is folded zigzag folded on this conveyor belt, not shown in the drawings. Since this second storage location 10 always leads and lags constantly in comparison to the speed of the infeed belt 4, the lateral mobility of the first deflection point 5 serves to prevent otherwise occurring loosening or tensile stresses in the fiber composite 2 due to this advance and lagging of the storage location.

Im Bereich der Ablagestelle 10 wird der Faserverbund 2 noch einmal umgelenkt und durch die Führung des Einlaufbandes 4 sowie eines aus den drei Darstellungen ersichtlichen weiteren Abdeckbandes 9 wird der Faserverbund 2 auch zwischen der ersten Umlenkstelle 5 und der Ablagestelle 10 entlüftet, da die beiden entsprechenden Bänder 4 und 9 den Faserverbund 2 zwischen sich führen, so dass der Faserverbund 2 nahezu auf seinem gesamten Weg durch den Kreuzleger 1 abgedeckt geführt ist.In the area of the storage location 10 of the fiber composite 2 is deflected once again and by the leadership of the inlet belt 4 and one of the three representations apparent further masking tape 9 of the fiber composite 2 is also vented between the first deflection point 5 and the deposition point 10, since the two corresponding bands 4 and 9 lead the fiber composite 2 between them, so that the fiber composite 2 is guided almost covered on its entire way through the stacker 1.

Zudem können Umlenkrollen 11 im Bereich dieser Ablagestelle 10 so angeordnet sein, dass sie als Andruckrollen auch dort eine Entlüftung des Faserverbundes 2 bewirken, wo der Faserverbund in einem Kurvenverlauf geführt wird.In addition, pulleys 11 can be arranged in the region of this storage location 10 so that they cause there as a pressure rollers there is a venting of the fiber composite 2, where the fiber composite is guided in a curve.

Claims (9)

Als Wagenleger oder als Bandleger ausgestalteter Kreuzleger (1) für einen als Faservlies oder Faserflor ausgestalteten Faserverbund (2),
mit einem Einlaufband (4), welches den Faserverbund (2) zu einer ersten Umlenkstelle (5) transportiert,
und einem Abdeckband (6), welches ■ dem Faserverbund (2) anliegend verläuft, ■ in Förderrichtung des Einlaufbandes (4) vor der ersten Umlenkstelle (5) vorgesehen ist, ■ und dem Faserverbund (2) bis zu der ersten Umlenkstelle (5) anliegt, dadurch gekennzeichnet,
dass das Abdeckband (6) derart angeordnet ist, dass der Faserverbund (2) zwischen dem Einlaufband (4) und dem Abdeckband (6) unter Druck geführt ist,
und das Abdeckband (6) einen vom Faserverbund (2) weg führenden Lufttransport durch das Abdeckband (6) hindurch ermöglicht.As a feeder or stacker configured Kreuzleger (1) for a designed as a nonwoven or batt fiber composite fiber composite (2),
with an infeed belt (4) which transports the fiber composite (2) to a first deflection point (5),
and a masking tape (6), which ■ passes the fiber composite (2), Is provided in the conveying direction of the inlet belt (4) in front of the first deflection point (5), ■ and the fiber composite (2) up to the first deflection point (5), characterized,
that the cover (6) is arranged such that the fiber composite (2) between the infeed conveyor (4) and the cover (6) is guided under pressure,
and the masking tape (6) enables air transport through the masking tape (6) leading away from the fiber composite (2). Kreuzleger nach Anspruch 1, dadurch gekennzeichnet, dass das Abdeckband (6) mit einer vom Einlaufband (4) unterschiedlichen Geschwindigkeit angetrieben ist, derart, dass der Faserverbund (2) gestreckt oder gestaucht wird.A stacker according to claim 1, characterized in that the cover strip (6) is driven with a different speed from the infeed belt (4), such that the fiber composite (2) is stretched or compressed. Kreuzleger nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass auch die erste Umlenkstelle (5) mit Andruckelementen versehen ist, welche entlüftend auf den Faserverbund (2) Druck ausübend, dem Faserverbund (2) anliegen.A stacker according to claim 1 or 2, characterized in that also the first deflection point (5) is provided with pressure elements which venting on the fiber composite (2) applying pressure, the fiber composite (2) abut. Kreuzleger nach Anspruch 3, dadurch gekennzeichnet, dass die Andrückelemente in Form von Andruckrollen (8) ausgestaltet sind.A stacker according to claim 3, characterized in that the pressing elements in the form of pressure rollers (8) are configured. Kreuzleger nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass die Andrückelemente luftdurchlässig ausgestaltet sind.A stacker according to claim 3 or 4, characterized in that the pressure elements are designed permeable to air. Kreuzleger nach Anspruch 3, dadurch gekennzeichnet, dass die Andrückelemente durch das Abdeckband (6) gebildet sind, welches um einen Teilumfang der ersten Umlenkstelle (5) geführt ist.A stacker according to claim 3, characterized in that the pressing elements are formed by the cover strip (6), which is guided around a partial circumference of the first deflection point (5). Kreuzleger nach Anspruch 3, dadurch gekennzeichnet, dass die Andrückelemente durch das Abdeckband (6) gebildet sind, welches mehrfach umgelenkt und mehrfach an die erste Umlenkstelle (5) herangeführt ist.A stacker according to claim 3, characterized in that the pressing elements are formed by the cover strip (6), which is deflected several times and repeatedly brought to the first deflection point (5). Kreuzleger nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass das Abdeckband (6) mit Luftkanälen versehen ist.A stacker according to one of the preceding claims,
characterized in that the cover strip (6) is provided with air channels. Kreuzleger nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass das Abdeckband (6) als Siebband ausgestaltet ist.A stacker according to one of the preceding claims,
characterized in that the cover strip (6) is designed as a screen belt.
EP07012112A 2006-06-21 2007-06-21 Cross-lapper Active EP1870499B1 (en)

Applications Claiming Priority (1)

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DE102006028448A DE102006028448A1 (en) 2006-06-21 2006-06-21 stacker

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WO2012059272A1 (en) * 2010-11-02 2012-05-10 Trützschler Nonwovens Gmbh Cross-lapper
CN103189554A (en) * 2010-11-02 2013-07-03 特吕茨勒非织造布有限公司 Cross-lapper
DE102013101398A1 (en) * 2013-02-13 2014-08-14 Trützschler GmbH & Co Kommanditgesellschaft Apparatus and method for influencing the basis weight profile of a batt
US9814176B2 (en) 2014-11-26 2017-11-14 Cnh Industrial Canada, Ltd. Belted seed transfer mechanism
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EP3150753B1 (en) 2015-09-30 2020-01-08 Oskar Dilo Maschinenfabrik KG Apparatus for conveying a fibrous web or a nonwoven fabric

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WO2012059272A1 (en) * 2010-11-02 2012-05-10 Trützschler Nonwovens Gmbh Cross-lapper
CN103189554A (en) * 2010-11-02 2013-07-03 特吕茨勒非织造布有限公司 Cross-lapper
CN103221591A (en) * 2010-11-02 2013-07-24 特吕茨勒非织造布有限公司 Cross-lapper
DE102013101398A1 (en) * 2013-02-13 2014-08-14 Trützschler GmbH & Co Kommanditgesellschaft Apparatus and method for influencing the basis weight profile of a batt
DE102013101398B4 (en) * 2013-02-13 2015-10-29 Trützschler GmbH & Co Kommanditgesellschaft Apparatus and method for influencing the basis weight profile of a batt
US9814176B2 (en) 2014-11-26 2017-11-14 Cnh Industrial Canada, Ltd. Belted seed transfer mechanism
WO2018162369A1 (en) 2017-03-09 2018-09-13 Andritz Asselin-Thibeau Crosslapper
FR3063741A1 (en) * 2017-03-09 2018-09-14 Andritz Asselin Thibeau FLATNESS

Also Published As

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EP1870499B1 (en) 2010-07-28
EP1870499A3 (en) 2008-06-18
DE502007004536D1 (en) 2010-09-09
DE102006028448A1 (en) 2007-12-27
ATE475729T1 (en) 2010-08-15

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