EP0354426B1 - Sucked-off synchronous feeding apparatus for a carding machine - Google Patents

Sucked-off synchronous feeding apparatus for a carding machine Download PDF

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Publication number
EP0354426B1
EP0354426B1 EP89113950A EP89113950A EP0354426B1 EP 0354426 B1 EP0354426 B1 EP 0354426B1 EP 89113950 A EP89113950 A EP 89113950A EP 89113950 A EP89113950 A EP 89113950A EP 0354426 B1 EP0354426 B1 EP 0354426B1
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EP
European Patent Office
Prior art keywords
suction
licker
trough plate
tube
codirectional
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Expired - Lifetime
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EP89113950A
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German (de)
French (fr)
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EP0354426A1 (en
Inventor
Giuseppe Verzilli
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication of EP0354426A1 publication Critical patent/EP0354426A1/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
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/76—Stripping or cleaning carding surfaces; Maintaining cleanliness of carding area
    • D01G15/80—Arrangements for stripping cylinders or rollers
    • D01G15/805—Arrangements for stripping cylinders or rollers by suction or blowing
    • 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
    • D01G15/14—Constructional features of carding elements, e.g. for facilitating attachment of card clothing
    • D01G15/20—Feed rollers; Takers-in

Definitions

  • the present invention relates to a suctioned synchronous feed device for a card, consisting of a feed roller and a trough plate interacting therewith, which feed a fiber wool to a briseur, and a suction channel, which extends over the entire length of the troughplate or the entire axial length of the briseur and sucks the transfer point of the fiber wadding from the trough plate or feed roller to the breeze to remove dirt.
  • the object of the present invention is to develop a suctioned synchronous feed device of the type mentioned in such a way that dirt accumulations no longer get stuck in the suction channel or at least in critical areas thereof and are completely transported out of this channel, with relatively simple means, this suctioning via the entire adjustment range of the trough plate is effective.
  • the suction channel consists of a tube extending over approximately the entire axial length of the breeze, at one end of which a suction source can be connected, and of a feed channel extending from the transfer point to the tube and consisting of approximately the entire axial length of the breeze opens tangentially into the pipe.
  • the suction channel in the form of a tube having a cylinder-like inner passage with a tangential opening in this tube or in this passage Supply channel, which extends over the entire axial length of the breeze, in combination with the simultaneous suction of the tube creates a kind of helical flow in it, which on the one hand keeps the walls of the tube clean, on the other hand keeps the carried dirt particles in motion and always in Direction of the suction source transported along this tube.
  • the feed channel preferably consists of two longitudinal walls, the first extending from the tube to the breeze cover and the second extending from the tube to the side of the trough plate facing the breeze.
  • the two longitudinal walls can be formed as smooth, continuous walls, so that there are no corners or dead spaces in the entire feed channel where dirt particles could get caught. This prevents any risk of dirt accumulation falling down.
  • the tube is preferably arranged stationary on the machine frame above the breeze, the first longitudinal wall of the feed channel extending downward from the lower region of the tube and passing approximately tangentially into the breeze cover.
  • This design of the first longitudinal wall ensures a clean tangential inflow into the tube and prevents dead corners from appearing at the transition point to the beater cover.
  • This transition point is preferably designed so that the lowermost edge of the first longitudinal wall of the feed channel extends approximately down to the lowest edge of the breeze cover adjacent to the transfer point. Since the bottom edge of the breeze cover is a few cm above the bottom edge of the trough plate, the air transported with the surface of the breeze becomes more or less blown into the feed channel so that the suction power of the suction source can be significantly reduced in this way according to the invention. In addition, it is ensured that any dirt particles moving with this air flow are captured and removed in good time by the suction flow.
  • the second longitudinal wall of the feed channel merges at its upper end approximately tangentially into the jacket wall of the tube and is pressed with its lower end preferably resiliently against the side of the trough plate facing the breeze.
  • the second longitudinal wall is resiliently opposed over the entire adjustment range of the trough plate from the first end position of the trough plate near the breeze to the second end position furthest from the breeze the side of the trough plate facing the breeze.
  • This arrangement of the two longitudinal walls also creates the condition for the fact that in the first end position of the trough plate, the first and second longitudinal walls can form a diverging feed channel, while in the second end position the feed channel has either a constant cross section or a converging shape.
  • This has the advantage that the tangential flow velocity of the air into the tube can be maintained at least within reasonable limits over the entire adjustment range of the trough plate, so that the aforementioned helical flow and the desired self-cleaning effect occur.
  • the feed channel is closed at the ends by corresponding side walls.
  • Fig. 1 shows the bearing housing 10 for the breeze 11, which is driven about the axis of rotation 12 for a rotary movement in the direction of arrow 13. As indicated at 14, the breeze has teeth on its surface.
  • the bearing housing 15 In front of the breeze, the bearing housing 15 is shown for a feed roller 16 which is driven to rotate about the axis 17.
  • the feed roller rotates in the direction of arrow 18.
  • Above the feed roller 16 the so-called trough plate 19 (fiber feed trough plate) is shown, which represents a relatively rigid structure. It presses the fiber wad arriving at a fiber wad feed table (not shown) increasingly against the feed roller 16 and ensures that a compressed fiber wad is fed to the breeze.
  • the trough plate 19 is shown in the drawing according to FIG. 1 in its one end position, where it lies directly next to the breeze. From this drawing it can be seen that in the transfer point from the feed roller to the breeze the surfaces move in the same direction, ie in the direction of arrow 22 in the drawing, because this is a synchronous feed device.
  • the fibers combed out of the fiber wadding by the breeze are transported on its surface and transferred to the carding drum 24, which has a set of teeth and runs in the direction of arrow 23.
  • this drum has a large diameter, which is why for the sake of illustration only a small area of the drum can be seen in FIG. 1.
  • the breeze has a cover 25 in its upper region between the drum and the trough plate, this cover coming to an end at 26.
  • the tube 27 makes a slight bend and leads to a suction source.
  • This arc is schematically indicated by the circle 28, which represents the cross section of the tube after the arc mentioned.
  • a first longitudinal wall 29 of a feed channel 34 leads down to shortly before the lowermost point 26 of the breeze cover 25, where this first longitudinal wall merges approximately tangentially into the breeze cover.
  • a second longitudinal wall 31 of the feed channel 34 which is designed as a spring steel sheet and presses against the side 32 of the food tray plate facing the briseur 11, namely relatively close to its lowermost edge 33 merges approximately tangentially into the jacket wall of the tube 27.
  • the feed channel formed by the two longitudinal walls 29, 31 points in the end position of the food tray plate shown in FIG. 1 in the direction of the tube 27, given by the pivotability of the trough plate 19 represented by the arrow 50 about the axis 27 of the feed roller 16, a diverging shape.
  • a suction source is connected to pipe 27 (at 28) and sucks air through this pipe 27.
  • the briseur carries a considerable amount of air with him, this amount of air flowing into the feed channel 34 after the lowermost edge 26 of the briseur cover.
  • the fiber wadding compressed between the feed roller and the trough plate is air-permeable to a certain extent despite the compression achieved, and air continues to flow out of this fiber wadding at the transfer point, as indicated by arrow 36.
  • the air flow marked with arrow 35 and the air flow marked with arrow 36 both contain dirt particles and continue to flow along the feed channel 34 until they finally flow tangentially into the tube 27, as indicated by the arrows 37.
  • a helical flow is indicated by the arrows 38, which strokes the entire inner wall of the tube 27 and prevents dirt particles from accumulating here. Since the mouth of the feed channel 34 extends into the tube over the entire axial length of the breeze, the particles that cross the mouth of the feed channel into the tube with the air flow 39 theoretically find a chance to flow back into the feed channel 34. However, this is prevented by the upwardly rising tangentially introduced flow 37. In this way it is possible to remove the dirt particles that are sucked off at the transition point or are removed from the teeth of the breeze or the peripheral air moving with it, so that no dirt particles can fall back to the transfer point.
  • Fig. 2 shows the arrangement after the trough plate has pivoted about the axis of rotation 17 of the feed roller in its second end position. This adjustment is made in order to adapt to the stack length of the fibers to be processed.
  • the trough plate not only has the two end positions, but it can be attached in any position between these two end positions.
  • the feed trough plate itself is designed as described in our European applications EP-A-275 471 and EP-A-271 115. It is essential in the present description that the second longitudinal wall 31 pressed resiliently against the feed tray plate also presses in the second end position (and in all intermediate positions) against the side 32 of the tray plate facing the breeze.
  • the feed channel 34 projects so far beyond the trough plate 19 that the end faces of the channel 34 are covered by cover plates 41 in such a way that the two cover plates are firmly connected to the longitudinal wall 29, but project beyond the longitudinal wall 31 in this way that the cover plates also form a cover when the feed channel 34, as shown in FIG. 2, has the greatest width.
  • the reference numeral 42 represents a guide plate that the Threading the fiber wadding between the trough plate and the feed roller easier. After this threading, the sheet can be folded down onto the surface of the fiber wadding.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Description

Die vorliegende Erfindung betrifft eine abgesaugte Gleichlaufspeisevorrichtung für eine Karde, bestehend aus einer Speisewalze und einer damit zusammenwirkenden Muldenplatte, welche eine Faserwatte einem Briseur zuführen, und einem Absaugkanal, der sich über die gesamte Länge der Muldenplatte bzw. die gesamte axiale Länge des Briseurs erstreckt und die Übergabestelle der Faserwatte von der Muldenplatte bzw. Speisewalze an den Briseur zwecks Schmutzentfernung absaugt.The present invention relates to a suctioned synchronous feed device for a card, consisting of a feed roller and a trough plate interacting therewith, which feed a fiber wool to a briseur, and a suction channel, which extends over the entire length of the troughplate or the entire axial length of the briseur and sucks the transfer point of the fiber wadding from the trough plate or feed roller to the breeze to remove dirt.

Eine derartige Anordnung ist in der europäischen Patentschrift 22 472 beschrieben.Such an arrangement is described in European Patent 22,472.

Die dort beschriebene Absaugung hat sich in der Praxis als sehr wirksam erweisen. Es gelingt auf diese Weise noch eine beträchtliche Anzahl von Schmutzteilchen, Staub und dergl. aus den Spitzen an der der Übergabestelle zulaufenden Oberfläche des Briseurs bzw. aus der mit dem Briseur zugeführten Luft zu entfernen, so daß diese Schmutz- bzw. Staubteilchen bei der nachfolgenden Verarbeitung der Fasern keine Schwierigkeiten bereiten können.The suction described there has proven to be very effective in practice. In this way, it is still possible to remove a considerable number of dirt particles, dust and the like from the tips on the surface of the breeze which runs towards the transfer point or from the air supplied with the breeze, so that these dirt or dust particles are removed in the subsequent step Processing the fibers can be no problem.

Das Problem der Schmutzentfernung ist in letzter Zeit immer aktueller geworden, nachdem die Baumwollernte zunehmend maschinell erfolgt, was zu einem weitaus höheren Grad der Verunreinigung der Baumwollflocken führt. Trotz großer Sorgfalt beim Öffnen der Ballen und beim Putzen der Baumwollflocken gelangen immer wieder Schmutzteilchen weiter in der Spinnereivorbereitungsmaschinen.The problem of dirt removal has recently become more and more topical after the cotton is being harvested more and more mechanically, which leads to a far higher degree of contamination of the cotton flakes. Despite great care when opening the bales and cleaning the cotton flakes, dirt particles continue to get into the spinning preparation machines.

Obwohl die in der europäischen Patentschrift 22 472 beschriebene Anordnung in der Praxis zu ausgezeichneten Ergebnissen geführt hat, kommt es selten, aber gelegentlich doch vor, daß Konzentrationen von Schmutzteilchen im Bereich des Tambours auftreten.Although the arrangement described in European Patent 22,472 has given excellent results in practice, it is rare, but occasional, that concentrations of dirt particles occur in the area of the drum.

Es hat sich gezeigt, daß diese Konzentrationen von Schmutzteilchen darauf zurückzuführen sind, daß Schmutzteilchen zwar an der Übergabestelle der Absaugeinrichtung entfernt werden, jedoch teilweise in dem dort vorhandenen Saugkanal hängenbleiben und gelegentlich zu der Übergabestelle zurückfallen, wo sie vom Briseur in die Faserwatte gedrückt und anschließend vom Briseur zum Tambour transportiert werden.It has been shown that these concentrations of dirt particles are due to the fact that dirt particles are removed at the transfer point of the suction device, but sometimes get stuck in the suction channel there and occasionally fall back to the transfer point, where they are pressed into the fiber wadding by the breeze and then be transported from the breeze to the drum.

Aufgabe der vorliegenden Erfindung ist es, eine abgesaugte Gleichlaufspeisevorrichtung der eingangs genannten Art so weiterzubilden, daß Schmutzansammlungen im Absaugkanal oder zumindest in kritischen Bereichen desselben nicht mehr hängenbleiben und vollständig aus diesem Kanal heraustransportiert werden, und zwar mit relativ einfachen Mitteln, wobei diese Absaugung über den gesamten Stellbereich der Muldenplatte wirksam ist.The object of the present invention is to develop a suctioned synchronous feed device of the type mentioned in such a way that dirt accumulations no longer get stuck in the suction channel or at least in critical areas thereof and are completely transported out of this channel, with relatively simple means, this suctioning via the entire adjustment range of the trough plate is effective.

Zur Lösung dieser Aufgabe sieht die Erfindung vor, daß der Absaugkanal aus einem sich über etwa die gesamte axiale Länge des Briseurs erstreckenden Rohr, an dessen einem Ende eine Saugquelle anschließbar ist, und aus einem von der Übergabestelle zum Rohr verlaufenden Zuführkanal besteht, der über etwa die gesamte axiale Länge des Briseurs tangential in das Rohr einmündet.To achieve this object, the invention provides that the suction channel consists of a tube extending over approximately the entire axial length of the breeze, at one end of which a suction source can be connected, and of a feed channel extending from the transfer point to the tube and consisting of approximately the entire axial length of the breeze opens tangentially into the pipe.

Durch die Ausbildung des Absaugkanals in Form eines eine zylinderartige Innenpassage aufweisenden Rohres mit einem in diesem Rohr bzw. in dieser Passage tangential einmündenden Zufuhrkanal, der sich über die gesamte axiale Länge des Briseurs erstreckt, wird in Kombination mit der gleichzeitigen Absaugung des Rohres in diesem eine Art helixförmige Strömung erzeugt, die einerseits die Wände des Rohres sauber hält, andererseits die mitgetragenen Schmutzteilchen stets in Bewegung hält und stets in Richtung der Absaugquelle entlang dieses Rohres abtransportiert.By designing the suction channel in the form of a tube having a cylinder-like inner passage with a tangential opening in this tube or in this passage Supply channel, which extends over the entire axial length of the breeze, in combination with the simultaneous suction of the tube creates a kind of helical flow in it, which on the one hand keeps the walls of the tube clean, on the other hand keeps the carried dirt particles in motion and always in Direction of the suction source transported along this tube.

Der Zuführkanal besteht vorzugsweise aus zwei Längswänden, wobei sich die erste vom Rohr bis zur Briseurabdeckung erstreckt und die zweite vom Rohr bis zu der dem Briseur zugewandten Seite der Muldenplatte verläuft.The feed channel preferably consists of two longitudinal walls, the first extending from the tube to the breeze cover and the second extending from the tube to the side of the trough plate facing the breeze.

Hierdurch können die zwei Längswände als glatte durchgehende Wände gebildet werden, so daß im gesamten Zuführkanal keine Ecken oder Toträume vorhanden sind, wo Schmutzteilchen hängenbleiben könnten. Somit wird jegliche Gefahr des Herunterfallens von Schmutzansammlungen verhindert.As a result, the two longitudinal walls can be formed as smooth, continuous walls, so that there are no corners or dead spaces in the entire feed channel where dirt particles could get caught. This prevents any risk of dirt accumulation falling down.

Das Rohr ist bevorzugt feststehend am Maschinengestell oberhalb des Briseurs angeordnet, wobei die erste Längswand des Zuführkanals sich vom unteren Bereich des Rohres nach unten erstreckt und etwa tangential in die Briseurabdeckung übergeht. Diese Auslegung der ersten Längswand sorgt für eine saubere tangentiale Einströmung in das Rohr hinein und verhindert, daß tote Ecken an der Übergangsstelle zu der Briseurabdeckung entstehen.The tube is preferably arranged stationary on the machine frame above the breeze, the first longitudinal wall of the feed channel extending downward from the lower region of the tube and passing approximately tangentially into the breeze cover. This design of the first longitudinal wall ensures a clean tangential inflow into the tube and prevents dead corners from appearing at the transition point to the beater cover.

Diese Übergangsstelle ist vorzugsweise so gestaltet, daß die unterste Kante der ersten Längswand des Zuführkanals etwa bis zur untersten der Übergabestelle benachbarten Kante der Briseurabdeckung nach unten reicht. Da die unterste Kante der Briseurabdeckung einige cm oberhalb der untersten Kante der Muldenplatte liegt, wird die mit der Oberfläche des Briseurs transportierte Luft quasi in den Zuführkanal eingeblasen, so daß die Saugleistung der Saugquelle auf diese Weise erfindungsgemäß wesentlich reduziert werden kann. Zudem wird sichergestellt, daß etwaige sich mit diesem Luftstrom bewegende Schmutzteilchen von der Absaugströmung rechtzeitig erfaßt und abtransportiert werden.This transition point is preferably designed so that the lowermost edge of the first longitudinal wall of the feed channel extends approximately down to the lowest edge of the breeze cover adjacent to the transfer point. Since the bottom edge of the breeze cover is a few cm above the bottom edge of the trough plate, the air transported with the surface of the breeze becomes more or less blown into the feed channel so that the suction power of the suction source can be significantly reduced in this way according to the invention. In addition, it is ensured that any dirt particles moving with this air flow are captured and removed in good time by the suction flow.

Die zweite Längswand des Zuführkanals geht an ihrem oberen Ende etwa tangential in die Mantelwand des Rohres über und wird mit ihrem unteren Ende vorzugsweise federnd gegen die dem Briseur zugewandte Seite der Muldenplatte gedrückt.The second longitudinal wall of the feed channel merges at its upper end approximately tangentially into the jacket wall of the tube and is pressed with its lower end preferably resiliently against the side of the trough plate facing the breeze.

Dadurch, daß die Muldenplatte zwecks Anpassung an die mittlere Stapellänge um die Drehachse der Speisewalze verstellbar ist, wird die zweite Längswand über den gesamten Verstellbereich der Muldenplatte von der ersten Endstellung der Muldenplatte nahe dem Briseur bis zu der zweiten vom Briseur am weitesten entfernten Endstellung federnd gegen die dem Briseur zugewandten Seite der Muldenplatte gedrückt. Dort wird sichergestellt, daß die Absaugeinrichtung wirksam gegenüber der Muldenplatte einerseits und der Briseurabdeckung andererseits über den gesamten Verstellbereich der Muldenplatte abgedichtet ist.Due to the fact that the trough plate is adjustable around the axis of rotation of the feed roller in order to adapt to the mean stack length, the second longitudinal wall is resiliently opposed over the entire adjustment range of the trough plate from the first end position of the trough plate near the breeze to the second end position furthest from the breeze the side of the trough plate facing the breeze. There it is ensured that the suction device is effectively sealed against the trough plate on the one hand and the breeze cover on the other hand over the entire adjustment range of the trough plate.

Diese Anordnung der beiden Längswände schafft auch die Bedingung dafür, daß in der ersten Endstellung der Muldenplatte die erste und zweite Längswand einen divergierenden Zuführkanal bilden können, während in der zweiten Endstellung der Zuführkanal entweder einen konstanten Querschnitt oder eine konvergierende Gestalt aufweist. Dies hat den Vorteil, daß über den gesamten Verstellbereich der Muldenplatte die tangentiale Einströmgeschwindigkeit der Luft in das Rohr zumindest in vertretbaren Grenzen aufrechterhalten werden kann, so daß die erwähnte helixförmige Strömung und die erwünschte selbstreinigende Wirkung eintritt.This arrangement of the two longitudinal walls also creates the condition for the fact that in the first end position of the trough plate, the first and second longitudinal walls can form a diverging feed channel, while in the second end position the feed channel has either a constant cross section or a converging shape. This has the advantage that the tangential flow velocity of the air into the tube can be maintained at least within reasonable limits over the entire adjustment range of the trough plate, so that the aforementioned helical flow and the desired self-cleaning effect occur.

Schließlich soll erwähnt werden, daß der Zuführkanal an den Stirnenden durch entsprechende Seitenwände geschlossen ist.Finally, it should be mentioned that the feed channel is closed at the ends by corresponding side walls.

Die Erfindung wird nachfolgend näher erläutert anhand der Zeichnung, in welcher zeigen:

  • Fig. 1 eine schematische Seitenansicht der erfindungsgemäßen Gleichlaufspeisevorrichtung mit der Speiseplatte in der genannten ersten Endstellung, und
  • Fig. 2 die gleiche Ansicht wie Fig. 1, jedoch mit der Muldenplatte in der zweiten Endstellung.
The invention is explained in more detail below with reference to the drawing, in which:
  • Fig. 1 is a schematic side view of the synchronous feed device according to the invention with the feed plate in said first end position, and
  • Fig. 2 shows the same view as Fig. 1, but with the trough plate in the second end position.

Die Fig. 1 zeigt das Lagergehäuse 10 für den Briseur 11, der um die Drehachse 12 zu einer Drehbewegung in Pfeilrichtung 13 angetrieben wird. Wie bei 14 angedeutet, trägt der Briseur an seiner Oberfläche Zähne.Fig. 1 shows the bearing housing 10 for the breeze 11, which is driven about the axis of rotation 12 for a rotary movement in the direction of arrow 13. As indicated at 14, the breeze has teeth on its surface.

Vor dem Briseur ist das Lagergehäuse 15 für eine Speisewalze 16 gezeigt, die zu einer Drehbewegung um die Achse 17 angetrieben wird. Die Speisewalze dreht sich in Richtung des Pfeils 18. Oberhalb der Speisewalze 16 ist die sog. Muldenplatte 19 (Faserspeise-Muldenplatte) gezeigt, die ein relativ starres Gebilde darstellt. Sie drückt die an einem Faserwatte-Zuführtisch (nicht gezeigt) ankommende Faserwatte zunehmend gegen die Speisewalze 16 und sorgt mit dieser dafür, daß dem Briseur eine komprimierte Faserwatte zugeführt wird. Die Muldenplatte 19 ist in der Zeichnung gemäß Fig. 1 in ihrer einen Endstellung gezeigt, wo sie direkt neben dem Briseur liegt. Aus dieser Zeichnung sieht man, daß sich in der Übergabestelle von der Speisewalze bis zum Briseur die Oberflächen in der gleichen Richtung bewegen, d.h. in der Pfeilrichtung 22 in der Zeichnung, weil es sich hier um eine Gleichlaufspeisevorrichtung handelt.In front of the breeze, the bearing housing 15 is shown for a feed roller 16 which is driven to rotate about the axis 17. The feed roller rotates in the direction of arrow 18. Above the feed roller 16 the so-called trough plate 19 (fiber feed trough plate) is shown, which represents a relatively rigid structure. It presses the fiber wad arriving at a fiber wad feed table (not shown) increasingly against the feed roller 16 and ensures that a compressed fiber wad is fed to the breeze. The trough plate 19 is shown in the drawing according to FIG. 1 in its one end position, where it lies directly next to the breeze. From this drawing it can be seen that in the transfer point from the feed roller to the breeze the surfaces move in the same direction, ie in the direction of arrow 22 in the drawing, because this is a synchronous feed device.

Die vom Briseur aus der Faserwatte ausgekämmten Fasern werden an seiner Oberfläche weitertransportiert und an den eine Zähnegarnitur tragenden, sich in Richtung des Pfeils 23 laufenden Tambour 24 der Karde übergeben. Wie üblich weist dieser Tambour einen großen Durchmesser auf, weshalb der Darstellung halber nur ein kleiner Bereich des Tambours in der Fig. 1 zu sehen ist. Der Briseur weist eine Abdeckung 25 in seinem oberen Bereich zwischen dem Tambour und der Muldenplatte auf, wobei diese Abdeckung bei 26 zu Ende geht. Oberhalb des Briseurs, auf der rechten Seite der Muldenplatte 19 in Fig. 1, befindet sich ein Absaugrohr 27, das sich über die gesamte axiale Länge des Briseurs parallel zu dessen Drehachse 12 erstreckt. An der anderen Stirnseite des Briseurs, d.h. der Stirnseite, die hinter der Ebene der Zeichnung liegt, macht das Rohr 27 einen leichten Bogen und führt zu einer Saugquelle. Dieser Bogen ist schematisch durch den Kreis 28 angedeutet, welcher den Querschnitt des Rohres nach dem erwähnten Bogen darstellt.The fibers combed out of the fiber wadding by the breeze are transported on its surface and transferred to the carding drum 24, which has a set of teeth and runs in the direction of arrow 23. As usual, this drum has a large diameter, which is why for the sake of illustration only a small area of the drum can be seen in FIG. 1. The breeze has a cover 25 in its upper region between the drum and the trough plate, this cover coming to an end at 26. Above the breeze, on the right side of the trough plate 19 in FIG. 1, there is a suction pipe 27 which extends over the entire axial length of the breeze parallel to its axis of rotation 12. On the other end of the breeze, i.e. the end face, which lies behind the plane of the drawing, the tube 27 makes a slight bend and leads to a suction source. This arc is schematically indicated by the circle 28, which represents the cross section of the tube after the arc mentioned.

Von der Unterseite des Rohres führt eine erste Längswand 29 eines Zuführkanals 34 nach unten bis kurz vor der untersten Stelle 26 der Briseurabdeckung 25, wo diese erste Längswand etwa tangential in die Briseurabdeckung übergeht.From the underside of the tube, a first longitudinal wall 29 of a feed channel 34 leads down to shortly before the lowermost point 26 of the breeze cover 25, where this first longitudinal wall merges approximately tangentially into the breeze cover.

Links daneben steht eine zweite Längswand 31 des Zuführkanals 34, die als Federstahlblatt ausgebildet ist und sich gegen die dem Briseur 11 zugewandten Seite 32 der Speisenmuldenplatte andrückt, und zwar relativ nahe ihrer untersten Kante 33. Man sieht, daß der oberste Bereich der zweiten Längswand 31 in etwa tangential in die Mantelwand des Rohres 27 übergeht.To the left is a second longitudinal wall 31 of the feed channel 34, which is designed as a spring steel sheet and presses against the side 32 of the food tray plate facing the briseur 11, namely relatively close to its lowermost edge 33 merges approximately tangentially into the jacket wall of the tube 27.

Der von den zwei Längswänden 29, 31 gebildete Zuführkanal weist in der in Fig. 1 gezeigten Endstellung der Speisenmuldenplatte in Richtung des Rohres 27, gegeben durch die mit dem Pfeil 50 dargestellte Schwenkbarkeit der Muldenplatte 19 um die Achse 27 der Speisewalze 16, eine divergierende Gestalt auf. Im Betrieb wird eine Saugquelle an das Rohr 27 angeschlossen (bei 28) und saugt Luft durch dieses Rohr 27 hindurch. Der Briseur trägt nicht zuletzt aufgrund der Zähne 14 eine beträchtliche Luftmenge mit sich, wobei diese Luftmenge nach der untersten Kante 26 der Briseurabdeckung in den Zuführkanal 34 einströmt. Die zwischen Speisewalze und Muldenplatte komprimierte Faserwatte ist trotz der erreichten Kompression in bestimmtem Maße luftdurchlässig und es strömt auch weiter Luft an der Übergabestelle aus dieser Faserwatte heraus so wie mit dem Pfeil 36 angedeutet.The feed channel formed by the two longitudinal walls 29, 31 points in the end position of the food tray plate shown in FIG. 1 in the direction of the tube 27, given by the pivotability of the trough plate 19 represented by the arrow 50 about the axis 27 of the feed roller 16, a diverging shape. In operation, a suction source is connected to pipe 27 (at 28) and sucks air through this pipe 27. Not least because of the teeth 14, the briseur carries a considerable amount of air with him, this amount of air flowing into the feed channel 34 after the lowermost edge 26 of the briseur cover. The fiber wadding compressed between the feed roller and the trough plate is air-permeable to a certain extent despite the compression achieved, and air continues to flow out of this fiber wadding at the transfer point, as indicated by arrow 36.

Die mit Pfeil 35 gekennzeichnete Luftströmung und die mit Pfeil 36 gekennzeichnete Lufströmung enthalten beide Schmutzteilchen und strömen weiter entlang des Zuführkanals 34, bis sie schließlich tangential in das Rohr 27 ein strömen, so wie mit den Pfeilen 37 gekennzeichnet. Im Rohr selbst entsteht aufgrund der Absaugung und aufgrund der einströmenden Luft 37 mit Schmutzteilchen eine helixförmige Strömung, mit den Pfeilen 38 gekennzeichnet, die über die gesamte Innenwand des Rohres 27 streicht und verhindert, daß sich hier Schmutzteilchen ansammeln. Da die Mündung des Zuführkanals 34 in das Rohr über die gesamte axiale Länge des Briseurs verläuft, finden zwar die Teilchen, die mit der Luftströmung 39 die Mündung des Zuführkanals in das Rohr überqueren, theoretisch eine Chance, wieder zurück in den Zuführkanal 34 zu strömen. Dies wird jedoch durch die nach oben steigende tangential eingeführte Strömung 37 verhindert. Es gelingt auf diese Weise, die Schmutzteilchen, die an der Übergangsstelle abgesaugt werden bzw. aus den Zähnen des Briseurs oder der mit diesem sich bewegenden Umfangsluft entnommen werden, zu entfernen, so daß keine Schmutzteilchen zu der Übergabestelle zurückfallen können.The air flow marked with arrow 35 and the air flow marked with arrow 36 both contain dirt particles and continue to flow along the feed channel 34 until they finally flow tangentially into the tube 27, as indicated by the arrows 37. In the tube itself, due to the suction and the inflowing air 37 with dirt particles, a helical flow is indicated by the arrows 38, which strokes the entire inner wall of the tube 27 and prevents dirt particles from accumulating here. Since the mouth of the feed channel 34 extends into the tube over the entire axial length of the breeze, the particles that cross the mouth of the feed channel into the tube with the air flow 39 theoretically find a chance to flow back into the feed channel 34. However, this is prevented by the upwardly rising tangentially introduced flow 37. In this way it is possible to remove the dirt particles that are sucked off at the transition point or are removed from the teeth of the breeze or the peripheral air moving with it, so that no dirt particles can fall back to the transfer point.

Die Fig. 2 zeigt die Anordnung, nachdem die Muldenplatte um die Drehachse 17 der Speisewalze in ihre zweite Endstellung geschwankt ist. Diese Verstellung wird vorgenommen, um eine Anpassung an die Stapellänge der zur Verarbeitung anstehenden Fasern zu bewirken. Natürlich hat die Muldenplatte nicht nur die zwei Endstellungen, sondern sie kann in jeder beliebigen Position zwischen diesem beiden Endstellungen befestigt werden. Die Speisemuldenplatte selbst ist so ausgeführt, wie in unseren europäischen Anmeldungen EP-A-275 471 und EP-A-271 115 beschrieben. Wesentlich bei der vorliegenden Beschreibung ist, daß die federnd gegen die Speisemuldenplatte angedrückte zweite Längswand 31 auch in der zweiten Endstellung (und in allen Zwischenstellungen) gegen die dem Briseur zugewandte Seite 32 der Muldenplatte andrückt. Aus der Zeichnung ist auch zu ersehen, daß in der zweiten Endstellung der Zuführkanal 34 nunmehr eher einen konstanten Querschnitt aufweist, obwohl dieser auch leicht konvergierend gestaltet werden kann. Dies hat den besonderen Vorteil, daß die Luftströmungsgeschwindigkeit an der Stelle, in der sie in das Rohr 27 hineinströmt, trotz der Verstellung der Muldenplatte innerhalb von vertretbaren Grenzen gehalten werden kann, so daß stets die erwünschte helixförmige Strömung eintritt.Fig. 2 shows the arrangement after the trough plate has pivoted about the axis of rotation 17 of the feed roller in its second end position. This adjustment is made in order to adapt to the stack length of the fibers to be processed. Of course, the trough plate not only has the two end positions, but it can be attached in any position between these two end positions. The feed trough plate itself is designed as described in our European applications EP-A-275 471 and EP-A-271 115. It is essential in the present description that the second longitudinal wall 31 pressed resiliently against the feed tray plate also presses in the second end position (and in all intermediate positions) against the side 32 of the tray plate facing the breeze. From the drawing it can also be seen that in the second end position the feed channel 34 now has a more constant cross-section, although this can also be made slightly converging. This has the particular advantage that the air flow velocity at the point at which it flows into the tube 27 can be kept within reasonable limits despite the adjustment of the trough plate, so that the desired helical flow always occurs.

Es soll erwähnt werden, daß der Zuführkanal 34 die Muldenplatte 19 so weit überragt, daß die Stirnseiten des Kanals 34 durch Abdeckbleche 41 abgedeckt werden, und zwar derart, daß die beiden Abdeckbleche fest mit der Längswand 29 verbunden sind, die Längswand 31 jedoch derart überragen, daß die Abdeckbleche auch denn eine Abdeckung bilden, wenn der Zuführkanal 34, wie in Fig. 2 gezeigt, die größte Weite aufweist.It should be mentioned that the feed channel 34 projects so far beyond the trough plate 19 that the end faces of the channel 34 are covered by cover plates 41 in such a way that the two cover plates are firmly connected to the longitudinal wall 29, but project beyond the longitudinal wall 31 in this way that the cover plates also form a cover when the feed channel 34, as shown in FIG. 2, has the greatest width.

Das Bezugszeichen 42 stellt ein Führungsblech dar, das die Einfädelung der Faserwatte zwischen der Muldenplatte und der Speisewalze erleichtert. Nach dieser Einfädelung kann das Blech nach unten auf die Oberfläche der Faserwatte geklappt werden.The reference numeral 42 represents a guide plate that the Threading the fiber wadding between the trough plate and the feed roller easier. After this threading, the sheet can be folded down onto the surface of the fiber wadding.

Claims (9)

1. A codirectional feed device with suction-extraction for a card, comprising a feed roller and a trough plate cooperating therewith to supply a fibre lap to a licker-in, and also comprising a suction-extraction duct which extends over the entire length of the trough plate or the entire axial length of the licker-in and for dirt removal applies suction to the place where the fibre lap is delivered by the trough plate or feed roller to the licker-in, characterised in that the suction-extraction duct comprises a tube (27) extending over approximately the entire axial length of the licker-in and adapted to have a suction source connected to one end, and also comprises a supply duct (34) extending from the delivery place to the tube (27) and opening tangentially into said tube over approximately the entire axial length of the licker-in (11).
2. A codirectional feed device with suction-extraction according to claim 1, characterised in that the supply duct comprises two longitudinal walls (29, 31), the first wall (29) extending from the tube to the licker-in cover (25) and the second wall extending from the tube (27) to the side (32) of the trough plate (19) facing the licker-in.
3. A codirectional feed device with suction-extraction according to claim 2, characterised in that the tube (27) is permanently secured to the machine frame above the licker-in (11) and the first longitudinal wall (29) of the supply duct (34) extends downwards from the lower region of the tube (27) and merges approximately tangentially into the licker-in cover (25).
4. A codirectional feed device with suction-extraction according to claim 3, characterised in that the lowest edge of the first longitudinal wall (29) of the supply duct (34) extends downwards at least substantially to the lowest edge (26) of the licker-in cover (25) adjacent the delivery place.
5. A codirectional feed device with suction-extraction according to claim 3 or 4, characterised in that at its upper end the second longitudinal wall (31) of the supply duct (34) merges substantially tangentially into the casing wall of the tube (27) and is resiliently pressed against the side (32) of the trough plate (19) facing the licker-in.
6. A codirectional feed device with suction-extraction according to claim 5, characterised in that the trough plate (19) can be adjusted to the average staple length by being moved about the axis of rotation (17) of the feed roller ( 16) and in that the second longitudinal wall (31 ), over the entire range of adjustment of the trough plate (19) from the first end position thereof (Fig. 1) near the licker-in (11) to the second end position (Fig. 2) furthest from the licker-in, is resiliently pressed against the side (32) of the trough plate (19) facing the licker-in (11).
7. A codirectional feed device with suction-extraction according to claim 6, characterised in that in the first end position of the trough plate (19) the first and second longitudinal walls (29, 31) form a divergent supply duct (34).
8. A codirectional feed device with suction-extraction according to claim 7, characterised in that in the second end position of the trough plate (19) the first and second longitudinal walls (29, 31) form a supply duct (34) which is convergent or has a substantially constant cross-section.
9. A codirectional feed device with suction-extraction according to one of the preceding claims, characterised in that the supply duct is closed at the front ends by suitable side walls (41).
EP89113950A 1988-08-12 1989-07-28 Sucked-off synchronous feeding apparatus for a carding machine Expired - Lifetime EP0354426B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3827520 1988-08-12
DE3827520A DE3827520A1 (en) 1988-08-12 1988-08-12 SUCTIONED SIMULTANEOUS FEEDER FOR A CARD

Publications (2)

Publication Number Publication Date
EP0354426A1 EP0354426A1 (en) 1990-02-14
EP0354426B1 true EP0354426B1 (en) 1992-04-01

Family

ID=6360789

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EP89113950A Expired - Lifetime EP0354426B1 (en) 1988-08-12 1989-07-28 Sucked-off synchronous feeding apparatus for a carding machine

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US (1) US5038439A (en)
EP (1) EP0354426B1 (en)
JP (1) JPH0284513A (en)
DE (2) DE3827520A1 (en)

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Also Published As

Publication number Publication date
DE3827520A1 (en) 1990-02-15
US5038439A (en) 1991-08-13
EP0354426A1 (en) 1990-02-14
JPH0284513A (en) 1990-03-26
DE58901078D1 (en) 1992-05-07

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