EP1386986B1 - Device for removing a fiber web from a card with a suction roller - Google Patents
Device for removing a fiber web from a card with a suction roller Download PDFInfo
- Publication number
- EP1386986B1 EP1386986B1 EP20030008243 EP03008243A EP1386986B1 EP 1386986 B1 EP1386986 B1 EP 1386986B1 EP 20030008243 EP20030008243 EP 20030008243 EP 03008243 A EP03008243 A EP 03008243A EP 1386986 B1 EP1386986 B1 EP 1386986B1
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- European Patent Office
- Prior art keywords
- suction
- roller
- belt
- fibers
- web
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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
- D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
- D01G15/02—Carding machines
- D01G15/12—Details
- D01G15/46—Doffing or like arrangements for removing fibres from carding elements; Web-dividing apparatus; Condensers
Definitions
- the invention relates to a device according to the preamble of claim 1.
- Such a device is known from EP 0 704 561 B1.
- the suction device is designed as a suction shaft, which acts in the region on the fibers, in which they are transferred from the take-off roll to the conveyor belt.
- fast-moving conveyor belt is a subsequent impairment of resting on the conveyor belt fibers, z.
- air turbulence not excluded, so that the cohesion of the fibers can be disturbed, especially on fast moving bands.
- a generic arrangement is also known from GB 962 162 A, with an evacuated draw-off roller, and in which the removal of the fibers from the card is assisted by an air jet which is directed between the fibers and the card surface.
- US Pat. No. 4,475,272 A shows an arrangement in which the removal of the fibers does not take place by means of a suction-supported take-off roll, but in which the fibers are exclusively sucked off.
- An increase in volume ded fiber web or batt is barely avoidable due to the required, relatively strong suction. This increase in volume affects the cohesion of the fibers and makes them particularly sensitive to influences such.
- air turbulence which act on the fibers in the subsequent transport on a - especially on a fast-running - conveyor belt.
- US 5 361 451 A shows an arrangement in which the fibers pass from a card in free flight to an air-permeable, evacuated conveyor belt.
- an evacuated roll Above the conveyor belt is an evacuated roll is provided which forms a baffle or baffle for the free-flying fibers and which rotates in a direction opposite to the carding direction.
- two suction zones below the conveyor belt and within the roller of the fibers transporting air stream is fanned into two streams, which should result in a particularly voluminous fiber structure on the conveyor belt.
- this increase in volume affects the cohesion of the fibers and makes them particularly sensitive to influences such.
- air turbulence which act on the fibers in the subsequent transport on a - especially on a fast-running - conveyor belt.
- a suction roll arrangement for the press of a pulp drying machine is known.
- a moisture-laden cellulosic web is first passed between a press felt and a wire and then held by a suction roll on the press felt.
- Suction chambers in the suction roll help to remove moisture from the pulp web. The problem as it occurs with freely moving fibers or a very loose, sensitive fiber composite, is not addressed here.
- the invention has for its object to improve a generic device to the effect that they favor with simple means to different production conditions an optimal transfer of the fibers is adjustable and customizable. .
- the invention proposes to favor the transfer in a manner known per se by means of a negative pressure applied to the pile delivery belt.
- the suction effect is made possible by a suction roll, around which the pile delivery belt rotates.
- the suction effect can be influenced by the fact that a gap or slot nozzle provided within the suction roll is adjustable, so that they can be adjusted to different conditions Circumferential areas of the suction roller can act.
- the transfer from the take-off roll to the pile delivery belt can be optimally influenced by means of the suction roll.
- a homogenization of the suction effect is achieved in that, in addition to the gap or slot nozzle, a second suction region is provided on the suction roll, which acts in a larger compared to the nozzle peripheral portion of the suction roll.
- the two suction regions can be adjusted independently of each other, so that the most varied flow or vacuum conditions are adjustable, which act on the fibers to be transferred.
- the fiber transition and in particular the deposit on the pile delivery belt in the peripheral region of the suction roll instead, so controlled in the area in which the negative pressure acts, so that optimal fiber deposition can be supported on the pile delivery belt.
- the suction or negative pressure effect is supported by an air accumulation or overpressure effect, which facilitates the detachment of the fibers from the take-off roll.
- an air accumulation in the conveying direction of the fibers behind the take-off roll is generated by means of an auxiliary roll which rotates in the same direction with the take-off roll.
- a possible undisturbed acquisition of the nonwoven fabric on the pile delivery belt can be promoted in particular by the fact that the pile delivery belt runs slightly faster than the peripheral speed of the take-off roller corresponds. In this way, a jamming of material or a compression of the nonwoven fabric is avoided and in a conventional manner, as is known by different peripheral speeds of the carding machine and the take-off roll, produces a smoothest possible fiber layer on the pile delivery belt.
- the pile delivery belt can be followed by an accumulation belt as a further conveying device, wherein for the transfer of the fibers between the two belts a suction roller is provided, which is formed absorbent only on a part of its circumference.
- 1 as a whole denotes a device which serves for the production of fiber webs. From a carding machine 2, which conveys fibers 3 in the counterclockwise direction, the fibers 3 are removed by a take-off roll 4, and from the take-off roll 4 the fibers 3 reach a pile delivery belt 5.
- the pile delivery belt 5 runs around a total of three rolls, the take-off roll 4 being provided next to a suction roll 6 which has an air-permeable surface, just as the pile delivery belt 5 is made permeable to air. More than the three exemplified rolls can deviate be provided by the illustrated embodiment to z. B. to ensure a particularly reliable guidance of the pile delivery belt 5.
- the suction roll 6 has a slit nozzle 7 which is rotatably adjustable, so that the air-permeable periphery of the suction roll 6 moves together with the pile delivery belt 5, while the slotted nozzle 7, in contrast, stops rotation and their suction unfolds at a fixed, predetermined location.
- the slotted nozzle 7 can be adjusted to adjust the position of the negative pressure range zugronnen.
- the suction effect of the slit nozzle 7 can also be influenced by means known per se, for example by influencing the blower output of a suction fan, sliders more or less inserted into the extraction duct or the like.
- the fibers 3 pass from the take-off roll 4 to the pile delivery belt 5 in the region in which this rotates about the suction roll 6, ie in the bent region of this delivery belt 5.
- the split nozzle 7 effects or assists the transition of the fibers 3 from the Take-off roller 4 on the pile delivery belt 5 and in particular supports the detachment of the fibers 3 from the take-off roll 4.
- a subsequent second suction region of the suction roll 6 ensures optimal conditioning of the fibers 3 on the pile delivery belt 5.
- a second suction region is provided in the direction of rotation of the suction roller 6 behind the slit nozzle 7, which constitutes about 1/4 to 1/3 of the circumference of the suction roller 6 and is indicated purely schematically by 8.
- the influence of the fibers in the conveying direction behind the slit nozzle 7 is effected not only by the second suction region 8, but also by an air cushion, which is constructed downstream of the take-off roll 4 in the conveying direction.
- an auxiliary roll 9 is provided, which rotates in the same direction with the take-off roll 4, so that the adjacent surfaces of these two rolls meet in opposite directions. The circumferentially entrained by the auxiliary roll 9 air flow promotes the detachment of the fibers 3 of the take-off roll. 4
- the device 1 is further developed to the effect that an accumulation belt 10 is provided, which conveys the pile delivery belt 5 as well as possibly further pile delivery belts.
- the transfer of the fibers 3 from the pile delivery belt 5 onto the collecting belt 10 is promoted by a suction roller designated as transfer roller 11, which is absorbent only in a region 12 whose lateral boundaries are shown in FIG. 2 drawn through lines.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Nonwoven Fabrics (AREA)
- Preliminary Treatment Of Fibers (AREA)
Description
Die Erfindung betrifft eine Vorrichtung nach dem Oberbegriff des Anspruchs 1.The invention relates to a device according to the preamble of claim 1.
Eine derartige Vorrichtung ist aus der EP 0 704 561 B1 bekannt. Die Ansaugeinrichtung ist als Saugschacht ausgebildet, der in dem Bereich auf die Fasern einwirkt, in welchem sie von der Abzugswalze zum Förderband übergeben werden. Bei schnell laufendem Förderband ist eine anschließende Beeinträchtigung der auf dem Förderband aufliegenden Fasern, z. B. Luftwirbel, nicht ausgeschlossen, so dass der Zusammenhalt der Fasern insbesondere auf schnell laufenden Bändern gestört werden kann.Such a device is known from EP 0 704 561 B1. The suction device is designed as a suction shaft, which acts in the region on the fibers, in which they are transferred from the take-off roll to the conveyor belt. In fast-moving conveyor belt is a subsequent impairment of resting on the conveyor belt fibers, z. As air turbulence, not excluded, so that the cohesion of the fibers can be disturbed, especially on fast moving bands.
Auch aus der GB 962 162 A ist eine gattungsgemäße Anordnung bekannt, mit einer besaugten Abzugswalze, und bei der die Abnahme der Fasern von der Karde durch einen Luftstrahl unterstützt wird, der zwischen die Fasern und die Kardenoberfläche gerichtet ist.A generic arrangement is also known from GB 962 162 A, with an evacuated draw-off roller, and in which the removal of the fibers from the card is assisted by an air jet which is directed between the fibers and the card surface.
Die US 4 475 272 A zeigt eine Anordnung, bei der die Abnahme der Fasern nicht mittels einer saugunterstützten Abzugswalze erfolgt, sondern bei der die Fasern ausschließlich abgesaugt werden. Eine Volumenvergrößerung ded Faservlieses bzw. Faserflors ist dabei aufgrund der erforderlichen, vergleichsweise starken Saugkraft kaum zu vermeiden. Diese Volumenvergrößerung beeinträchtigt den Zusammenhalt der Fasern und macht sie besonders empfindlich gegen Einflüsse wie z. B. Luftwirbel, die bei dem anschließenden Transport auf einem - insbesondere auf einem schnell laufenden - Transportband auf die Fasern einwirken.US Pat. No. 4,475,272 A shows an arrangement in which the removal of the fibers does not take place by means of a suction-supported take-off roll, but in which the fibers are exclusively sucked off. An increase in volume ded fiber web or batt is barely avoidable due to the required, relatively strong suction. This increase in volume affects the cohesion of the fibers and makes them particularly sensitive to influences such. As air turbulence, which act on the fibers in the subsequent transport on a - especially on a fast-running - conveyor belt.
Die US 5 361 451 A zeigt eine Anordnung, bei der die Fasern von einer Krempel im freien Flug auf ein luftdurchlässiges, besaugtes Förderband gelangen. Oberhalb des Förderbandes ist eine besaugte Walze vorgesehen, welche für die frei fliegenden Fasern eine Prall- oder Leitfläche bildet und die in einer zur Krempel entgegengesetzten Richtung rotiert. Durch die beiderseits des Faserstroms angeordneten beiden Saugzonen unterhalb des Förderbandes und innerhalb der Walze wird der die Fasern transportierende Luftstrom in zwei Teilströme aufgefächert, was ein besonders voluminöses Fasergebilde auf dem Förderband ergeben soll. Auch diese Volumenvergrößerung beeinträchtigt den Zusammenhalt der Fasern und macht sie besonders empfindlich gegen Einflüsse wie z. B. Luftwirbel, die bei dem anschließenden Transport auf einem - insbesondere auf einem schnell laufenden - Transportband auf die Fasern einwirken.US 5 361 451 A shows an arrangement in which the fibers pass from a card in free flight to an air-permeable, evacuated conveyor belt. Above the conveyor belt is an evacuated roll is provided which forms a baffle or baffle for the free-flying fibers and which rotates in a direction opposite to the carding direction. By arranged on both sides of the fiber flow two suction zones below the conveyor belt and within the roller of the fibers transporting air stream is fanned into two streams, which should result in a particularly voluminous fiber structure on the conveyor belt. Also, this increase in volume affects the cohesion of the fibers and makes them particularly sensitive to influences such. As air turbulence, which act on the fibers in the subsequent transport on a - especially on a fast-running - conveyor belt.
Aus der US 3 787 930 A ist eine Anordnung bekannt, bei der die Faserabnahme von der Krempel ohne einen Kamm erfolgen soll, der ggf. auch als rotierende Abzugwalze ausgestaltet sein könnte. Vielmehr soll die Faserabnahme mittels eines Luftleitblechs, einer besaugten Walze und mehrerer Transportbänder erfolgen. Eine zu gleichmäßige Ausrichtung der Fasern soll dadurch verhindert und eine Neuausrichtung der Fasern begünstigt werden.From US Pat. No. 3,787,930 A, an arrangement is known in which the fiber removal from the carding is to take place without a comb, which could possibly also be configured as a rotating withdrawal roller. Rather, the fiber removal should be done by means of a baffle, a vacuumed roller and several conveyor belts. A uniform alignment of the fibers is thereby prevented and a reorientation of the fibers are favored.
Aus der DE 298 22 227 U1 ist eine Saugwalzenanordnung für die Presse einer Zellstoff-Trockenmaschine bekannt. Eine mit Feuchtigkeit beladene Zellstoffbahn wird zunächst zwischen einen Pressfilz und ein Sieb geführt und anschließend mittels einer Saugwalze an dem Pressfilz gehalten. Saugkammern in der Saugwalze helfen beim Abtransport der aus der Zellstoffbahn stammenden Feuchtigkeit. Die Problemstellung wie sie bei frei beweglichen Fasern oder einem nur sehr lockeren, empfindlichen Faserverbund auftritt, ist hier nicht angesprochen.From DE 298 22 227 U1 a suction roll arrangement for the press of a pulp drying machine is known. A moisture-laden cellulosic web is first passed between a press felt and a wire and then held by a suction roll on the press felt. Suction chambers in the suction roll help to remove moisture from the pulp web. The problem as it occurs with freely moving fibers or a very loose, sensitive fiber composite, is not addressed here.
Der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Vorrichtung dahingehend zu verbessern, dass diese mit einfachen Mitteln an unterschiedliche Produktionsverhältnisse zugunsten einer optimalen Übergabe der Fasern einstellbar und anpassbar ist. ,The invention has for its object to improve a generic device to the effect that they favor with simple means to different production conditions an optimal transfer of the fibers is adjustable and customizable. .
Diese Aufgabe wird durch eine Vorrichtung mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a device having the features of claim 1.
Die Erfindung schlägt mit anderen Worten vor, die Übergabe in an sich bekannter Weise durch einen am Flor-Lieferband anliegenden Unterdruck zu begünstigen. Dabei wird die Saugwirkung durch eine Saugwalze ermöglicht, um welche das Flor-Lieferband umläuft. Die Saugwirkung kann dadurch beeinflusst werden, dass eine innerhalb der Saugwalze vorgesehene Spalt- oder Schlitzdüse verstellbar ist, so dass sie an unterschiedlichen Umfangsbereichen der Saugwalze wirken kann. Je nach Produktionsgeschwindigkeit und verwendeter Fasersorte kann daher die Übergabe von der Abzugswalze zum Flor-Lieferband mittels der Saugwalze optimal beeinflusst werden.In other words, the invention proposes to favor the transfer in a manner known per se by means of a negative pressure applied to the pile delivery belt. The suction effect is made possible by a suction roll, around which the pile delivery belt rotates. The suction effect can be influenced by the fact that a gap or slot nozzle provided within the suction roll is adjustable, so that they can be adjusted to different conditions Circumferential areas of the suction roller can act. Depending on the production speed and the type of fiber used, therefore, the transfer from the take-off roll to the pile delivery belt can be optimally influenced by means of the suction roll.
Eine Vergleichmäßigung der Saugwirkung wird dadurch erzielt, dass außer der Spalt- bzw. Schlitzdüse ein zweiter Saugbereich an der Saugwalze vorgesehen ist, der in einem im Vergleich zur Düse größeren Umfangsabschnitt der Saugwalze wirkt. Vorteilhaft können die beiden Saugbereiche unabhängig voneinander eingestellt werden, sodass die unterschiedlichsten Strömungs- bzw. Unterdruckverhältnisse einstellbar sind, die auf die zu übergebenden Fasern einwirken.A homogenization of the suction effect is achieved in that, in addition to the gap or slot nozzle, a second suction region is provided on the suction roll, which acts in a larger compared to the nozzle peripheral portion of the suction roll. Advantageously, the two suction regions can be adjusted independently of each other, so that the most varied flow or vacuum conditions are adjustable, which act on the fibers to be transferred.
Vorteilhaft findet der Faserübergang und insbesondere die Ablage auf das Flor-Lieferband im Umfangsbereich der Saugwalze statt, also kontrolliert in dem Bereich, in welchem der Unterdruck wirkt, sodass eine optimale Faserablage auf dem Flor-Lieferband unterstützt werden kann.Advantageously, the fiber transition and in particular the deposit on the pile delivery belt in the peripheral region of the suction roll instead, so controlled in the area in which the negative pressure acts, so that optimal fiber deposition can be supported on the pile delivery belt.
Die Saug- bzw. Unterdruckwirkung wird unterstützt durch eine Luftstau- bzw. Überdruckwirkung, welche das Ablösen der Fasern von der Abzugswalze erleichtert. Dazu wird ein Luftstau in Förderrichtung der Fasern hinter der Abzugswalze erzeugt und zwar mittels einer Hilfswalze, die gleichsinnig mit der Abzugswalze rotiert.The suction or negative pressure effect is supported by an air accumulation or overpressure effect, which facilitates the detachment of the fibers from the take-off roll. For this purpose, an air accumulation in the conveying direction of the fibers behind the take-off roll is generated by means of an auxiliary roll which rotates in the same direction with the take-off roll.
Eine möglichst ungestörte Übernahme des Faservlieses auf das Flor-Lieferband kann insbesondere dadurch begünstigt werden, dass das Flor-Lieferband geringfügig schneller läuft als der Umfangsgeschwindigkeit der Abzugswalze entspricht. Auf diese Weise wird ein Materialstau bzw. eine Stauchung des Faservlieses vermieden und in an sich bekannter Weise, wie dies durch unterschiedliche Umfangsgeschwindigkeiten der Karde und der Abzugswalze bekannt ist, eine möglichst glatte Faserschicht auf dem Flor-Lieferband erzeugt.A possible undisturbed acquisition of the nonwoven fabric on the pile delivery belt can be promoted in particular by the fact that the pile delivery belt runs slightly faster than the peripheral speed of the take-off roller corresponds. In this way, a jamming of material or a compression of the nonwoven fabric is avoided and in a conventional manner, as is known by different peripheral speeds of the carding machine and the take-off roll, produces a smoothest possible fiber layer on the pile delivery belt.
Dem Flor-Lieferband kann als weitere Fördereinrichtung ein Sammelband nachgeschaltet sein, wobei zur Übergabe der Fasern zwischen den beiden Bändern eine Saugwalze vorgesehen ist, welche lediglich an einem Teil ihres Umfangs saugwirksam ausgebildet ist.The pile delivery belt can be followed by an accumulation belt as a further conveying device, wherein for the transfer of the fibers between the two belts a suction roller is provided, which is formed absorbent only on a part of its circumference.
Die an einem Teil ihres Umfangs wirksamen Saugwalzen mit Schlitzdüse sind beispielsweise aus der US PS 3 787 930 bekannt. Dabei wird jedoch vorgeschlagen, derartige Saugwalzen ausdrücklich zur Umorientierung der Fasern vorgesehen, während üblicherweise, und insbesondere bei einer gatturigsgemäßen Vorrichtung, die Fasern möglichst ungestört bleiben und ihre Orientierung beibehalten sollen.The effective on a part of its circumference suction rolls with slot die are known for example from US Patent No. 3,787,930. In this case, however, it is proposed that such suction rolls expressly provided for reorientation of the fibers, while usually, and in particular in a gatturigsgemäßen device, the fibers remain undisturbed as possible and should retain their orientation.
Ausführungsbeispiele der Erfindung werdennachfolgen anhand der Zeichnungen näher erläutert. Dabei zeigt
- Fig. 1
- ein ersten Ausführungsbeispiel mit einer Karde und einem Flor-Lieferband, und
- Fig. 2
- eine Anordnung ähnlich Fig. 1, mit nachgeschaltetem Flor-Sammelband.
- Fig. 1
- a first embodiment with a card and a Flor-Lieferband, and
- Fig. 2
- an arrangement similar to FIG. 1, with downstream pile-pile.
In den Zeichnungen ist mit 1 insgesamt eine Vorrichtung bezeichnet, die zur Herstellung von Faservliesen dient. Von einer Karde 2, welche Fasern 3 entgegen dem Uhrzeigersinn fördert, werden die Fasern 3 durch eine Abzugswalze 4 abgenommen und von der Abzugswalze 4 gelangen die Fasern 3 auf ein Flor-Lieferband 5.In the drawings, 1 as a whole denotes a device which serves for the production of fiber webs. From a carding machine 2, which conveys
Das Flor-Lieferband 5 läuft um insgesamt drei Walzen um, wobei der Abzugswalze 4 am nächsten eine Saugwalze 6 vorgesehen ist, die eine luftdurchlässige Oberfläche aufweist, ebenso wie das Flor-Lieferband 5 luftdurchlässig ausgestaltet ist. Mehr als die drei beispielhaft dargestellten Walzen können abweichend von dem dargestellten Ausführungsbeispiel vorgesehen sein, um z. B. eine besonders zuverlässige Führung des Flor-Lieferbandes 5 sicherzustellen.The
Die Saugwalze 6 weist eine Spaltdüse 7 auf, die drehfest einstellbar ist, sodass sich der luftdurchlässige Umfang der Saugwalze 6 zusammen mit dem Flor-Lieferband 5 bewegt, während die Spaltdüse 7 demgegenüber drehfest stehen bleibt und ihre Saugwirkung an einer feststehenden, vorgegebenen Stelle entfaltet.The
In punktierten Linien ist eine demgegenüber andere, abweichende Stellung der Spaltdüse 7 mit 7a angedeutet. Durch Verstellung um die Walzen-Längsachse kann die Spaltdüse 7 eingestellt werden, um die Lage des Unterdruckbereiches einstellen zukönnen. Abgesehen von dieser Verstellbarkeit kann auch mit an sich bekannten Mitteln die Saugwirkung der Spaltdüse 7 beeinflusst werden, beispielsweise durch eine Beeinflussung der Gebläseleistung eines Sauggebläses, durch mehr oder weniger weit in den Absaugtrakt eingeschobene Schieber oder dergleichen.In dotted lines, on the other hand, a different, different position of the slotted nozzle 7 with 7a is indicated. By adjusting about the roller longitudinal axis, the slotted nozzle 7 can be adjusted to adjust the position of the negative pressure range zukönnen. Apart from this adjustability, the suction effect of the slit nozzle 7 can also be influenced by means known per se, for example by influencing the blower output of a suction fan, sliders more or less inserted into the extraction duct or the like.
Die Fasern 3 gelangen von der Abzugswalze 4 auf das Flor-Lieferband 5 in dem Bereich, in welchem dieses um die Saugwalze 6 umläuft, also im gebogenen Bereich dieses Lieferbandes 5. Dabei bewirkt bzw. unterstützt die Spaltdüse 7 den Übergang der Fasern 3 von der Abzugswalze 4 auf das Flor-Lieferband 5 und unterstützt insbesondere die Ablösung der Fasern 3 von der Abzugswalze 4. Ein anschließender zweiter Saugbereich der Saugwalze 6 stellt eine optimale Anlage der Fasern 3 an dem Flor-Lieferband 5 sicher. Zu diesem Zweck ist in Drehrichtung der Saugwalze 6 hinter der Spaltdüse 7 ein zweiter Saugbereich vorgesehen, der etwa 1/4 bis 1/3 des Umfangs der Saugwalze 6 ausmacht und rein schematisch mit 8 angedeutet ist.The
Die Beeinflussung der Fasern in Förderrichtung hinter der Spaltdüse 7 wird jedoch nicht nur durch den zweiten Saugbereich 8 bewirkt, sondern auch durch ein Luftpolster, welches in Förderrichtung hinter der Abzugswalze 4 aufgebaut wird. Hierzu ist eine Hilfswalze 9 vorgesehen, die gleichsinnig mit der Abzugswalze 4 rotiert, sodass die einander benachbarten Oberflächen dieser beiden Walzen sich gegenläufig begegnen. Der von der Hilfswalze 9 umfangsmäßig mitgerissene Luftstrom begünstigt die Ablösung der Fasern 3 von der Abzugswalze 4.However, the influence of the fibers in the conveying direction behind the slit nozzle 7 is effected not only by the
In Fig. 2 ist die Vorrichtung 1 dahingehend weitergebildet, dass ein Sammelband 10 vorgesehen ist, welchem das Flor-Lieferband 5 wie auch gegebenenfalls weitere Flor-Lieferbänder zufördert. Die Übergabe der Fasern 3 vom Flor-Lieferband 5 auf das Sammelband 10 wird durch eine als Übergabewalze 11 bezeichnete Saugwalze begünstigt, welche lediglich in einem Bereich 12 saugwirksam ist, dessen seitliche Begrenzungen in Fig. 2 hindurchgezogenen Linien dargestellt sind.In Fig. 2, the device 1 is further developed to the effect that an accumulation belt 10 is provided, which conveys the
Claims (7)
- Device (1) for removing a fibre web from a card (2) with a removal roller (4) located downstream from the card (2) and with an air-permeable web-supply belt (5) located downstream from the removal roller (4), where a suction device is provided beneath the web-supply belt (5) i.e. on the side facing away from the removal roller (4),
characterised in that the suction device is formed by a suction roller (6) which, as its first suction area, has a relatively narrow slit or slotted nozzle (7) opening onto the surface of the roller parallel to the axis,
and that a larger second suction area (8) opposite the first suction
area, extends over a larger section of the circumference of the suction roller (6) than the slit or slotted nozzle (7). - Device according to claim 1, characterised in that the suction power of the second suction area (8) can be adjusted separately from the first suction area.
- Device according to claim 1 or claim 2, characterised in that the second suction area (8) composes approximately 1/4 to 1/3 of the circumference of the roller.
- Device according to one of the above claims, characterised by an auxiliary roller (9) which, seen in the direction of travel of the fibres, is located behind the removal roller (4) and rotates in the same direction as the removal roller, where distance between the removal roller (4) and the auxiliary roller (9) is of such a size that an air cushion forms between them which favours the release of the fibres (3) from the removal roller (4).
- Device according to one of the above claims, characterised in that the transfer area, in which the fibres (3) reach the web-supply belt (5) is provided on the surface of the suction roller (4).
- Device according to one of the above claims, characterised in that the websupply belt (5) runs slightly faster (approximately 10%) than the circumference speed of the removal roller (4).
- Device according to one of the above claims, characterised by a collecting belt (10) located downstream from the web-supply belt (5), where a suction roller (11) is provided between these two belts which is shaped to exercise a suction force on part of its circumference only.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10234803 | 2002-07-31 | ||
| DE2002134803 DE10234803A1 (en) | 2002-07-31 | 2002-07-31 | Device for removing a nonwoven fabric from a card, with a suction roller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1386986A1 EP1386986A1 (en) | 2004-02-04 |
| EP1386986B1 true EP1386986B1 (en) | 2007-05-16 |
Family
ID=30010518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20030008243 Expired - Lifetime EP1386986B1 (en) | 2002-07-31 | 2003-04-09 | Device for removing a fiber web from a card with a suction roller |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1386986B1 (en) |
| DE (2) | DE10234803A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1589132B1 (en) * | 2004-04-22 | 2007-06-13 | Asselin-Thibeau | Carding machine with a rotating suction transfer device |
| ITTO20040115U1 (en) * | 2004-09-24 | 2004-12-24 | Fincarde S P A | SYSTEM FOR THE TRANSFER OF A FIBER VEIL COMING FROM A CARDA. |
| FR3059344B1 (en) * | 2016-11-25 | 2019-11-22 | Andritz Asselin Thibeau | DEVICE FOR STRETCHING A SAIL PROVIDED BETWEEN A CARD DEVICE AND A CALIPER |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB962162A (en) * | 1960-08-03 | 1964-07-01 | Birfield Eng Ltd | Improvements in or relating to carding engines |
| DE2200870C3 (en) * | 1971-02-11 | 1979-08-02 | Veb Spinnereimaschinenbau Karl-Marx- Stadt, Ddr 9000 Karl-Marx-Stadt | Device for the pneumatic fiber feed of several spinning machines or individual work stations, at least one such |
| US3787930A (en) * | 1971-08-12 | 1974-01-29 | Kendall & Co | Process for randomizing card webs |
| US4475272A (en) * | 1983-02-07 | 1984-10-09 | Rando Machine Company | Sliver forming condenser |
| AT396791B (en) * | 1992-06-26 | 1993-11-25 | Fehrer Ernst | DEVICE FOR PRODUCING A FLEECE |
| AT397516B (en) * | 1992-12-23 | 1994-04-25 | Fehrer Ernst | Apparatus for the production of a fibre nonwoven |
| FR2725216B1 (en) * | 1994-09-30 | 1996-12-20 | Thibeau Et Cie A | DEVICE FOR DETACHING AND TRANSPORTING AT HIGH SPEED A FIBROUS VEIL LEAVING A CARD |
| FR2732042B1 (en) * | 1995-03-22 | 1997-06-13 | Thibeau & Cie Sa A | SUCTION CYLINDER ALLOWS THE TRANSFER OF A FIBROUS VEIL BETWEEN A CONVEYOR BELT AND TWO CALENDER CYLINDERS |
| DE19535876A1 (en) * | 1995-09-27 | 1997-04-03 | Hollingsworth Gmbh | Carded nonwoven web prodn. with consistent web material from assembly |
| FI106640B (en) * | 1997-12-15 | 2001-03-15 | Valmet Corp | Arrangement of suction roller for a pulp drying machine press and a similar method |
-
2002
- 2002-07-31 DE DE2002134803 patent/DE10234803A1/en not_active Ceased
-
2003
- 2003-04-09 DE DE50307279T patent/DE50307279D1/en not_active Expired - Lifetime
- 2003-04-09 EP EP20030008243 patent/EP1386986B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE10234803A1 (en) | 2004-02-12 |
| DE50307279D1 (en) | 2007-06-28 |
| EP1386986A1 (en) | 2004-02-04 |
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