EP0417614A1 - Apparatus for the continuous condensing or the control of the fibre ribbon mass - Google Patents

Apparatus for the continuous condensing or the control of the fibre ribbon mass Download PDF

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Publication number
EP0417614A1
EP0417614A1 EP90117028A EP90117028A EP0417614A1 EP 0417614 A1 EP0417614 A1 EP 0417614A1 EP 90117028 A EP90117028 A EP 90117028A EP 90117028 A EP90117028 A EP 90117028A EP 0417614 A1 EP0417614 A1 EP 0417614A1
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EP
European Patent Office
Prior art keywords
sliver
rollers
air
funnel
gap
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Granted
Application number
EP90117028A
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German (de)
French (fr)
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EP0417614B1 (en
Inventor
Daniel Erni
Paul Stäheli
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/72—Fibre-condensing guides
    • 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
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/22—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to presence of irregularities in running material

Definitions

  • the invention relates to a device for compressing or for determining the mass of a sliver with a pair of rollers that can be pressed against each other.
  • Compression and measuring devices for fiber tapes made of textile fibers for example following a card or on a draw frame, have long been known and in use.
  • a compression device of the aforementioned type is known from European Patent No. 00 783 93.
  • Two wedge rollers are shown therein, which delimit an area within which the fiber sliver is compressed.
  • the measurement of density or Mass of the fiber sliver takes place in that one roller is arranged to be stationary and the other is movable and in that the movements of the movable roller are measured, that is to say that the distance between the two rollers in the region of the wedge gap can be measured with the aid of the movable roller .
  • the present invention is based on the object of improving the threading of the sliver.
  • roller surfaces by means of spacers, form a predetermined minimum mutual gap Have a distance which has a predetermined size, which corresponds approximately to the smallest thickness of the sliver to be processed.
  • the advantage of the invention is, on the one hand, that there is a sufficiently large gap for threading, which on the one hand allows the sliver to be gripped better and on the other hand allows air to be blown through to convey the sliver into the wedge gap.
  • the towed roller can be driven to a predetermined speed by the spacer. before the sliver gets into the wedge gap.
  • a further advantageous embodiment of the invention consists in that a sliver introduction funnel is also provided which pre-compresses the sliver to a predetermined cross-sectional profile and which is arranged in such a way that the sliver is guided through the outlet opening of the guide funnel into said predetermined wedge gap and that at least an air duct is provided such that the compressed air guided therein creates an injector effect in the guide funnel, which sucks the fiber sliver into the funnel.
  • rotating rollers carry air moving on their surface in the direction of movement of these surfaces, which is disadvantageous, for example, if it is undesirable in the converging gap of the two rollers, for example if the air is not between the two rollers is carried out, but in the axial direction of the rollers, that is to say with a deflection of 90 °, escapes and disruptively transports fibers.
  • this disadvantage is remedied by an embodiment in which the air duct mentioned can optionally also be connected to a suction source, so that air can be sucked out of the converging gap.
  • FIG. 1 shows a pair of rollers 1 as can be used, for example, in connection with a drafting system.
  • the pair of rollers consists of a driven roller 2 and a towed roller 3.
  • the driven roller 2 has a spacer and drive ring 4, on which the circumference of the towed roller 3 rests.
  • the ring 4 not only has the task of driving the drag roller 3 but also to produce a distance A between the two rollers. The purpose of this distance A will be explained later.
  • the driven roller 2 has a drive shaft 5 which is rotatably supported in a stationary bearing 6 and an axis 7 which is also rotatably supported in a stationary bearing 8.
  • the towed roller 3 has an axis 9 which is rotatably mounted in a bearing 10 and an axis 11 which is rotatably supported in a bearing 12.
  • the two bearings 10 and 12 are arranged to be displaceable in order to give the towed roller the possibility in the directions of movement Y (FIG. 2) of the driven roller 2 and to be moved against it.
  • the mechanism for the movement resp. the guides that receive the bearings 10 and 12 to allow movement in the Y direction are known per se and are not explained in detail.
  • the dragged roller 3 When the sliver is introduced, the dragged roller 3 already has a peripheral speed which corresponds to the peripheral speed of the spacer and drive ring 4.
  • the distance A between the two roller surfaces corresponds essentially to the smallest possible thickness D of a sliver F, that is to say to put it more precisely, a few tenths of a millimeter less than the smallest thickness D.
  • FIGS. 3 to 8 show pairs of rollers, as are shown and described in principle in European Patent No. 00 783 93, for which reason only the essential features thereof are repeated.
  • Figures 3 and 4 show a pair of rollers 20, as shown in the aforementioned European patent with Figures 1 and 3.
  • the roller pair 20 comprises, again briefly mentioned, a driven stepped roller 21, a towed roller 22, an inventive spacer and drive ring, not shown in the aforementioned European patent specification, which is seen on the driven roller 21 on the right outer edge, with a view of FIG. 3 is firmly arranged on the driven roller 21.
  • the ring 23 is outside the area in which a sliver F.1 is guided between the driven and the towed roller, which is also shown in FIG. 1.
  • the spacer and drive ring 23 has a height, wel che the distance A1 ( Figure 3) between a ring 28 and the base of an annular groove 29 results.
  • the ring 28 is part of the dragged roller 22 and the ring groove 29 is provided in the driven roller 21, as mentioned in the aforementioned European patent, in order to compress the sliver in the area of the gap A.1, respectively. to measure the mass of the sliver.
  • the towed roller 22 can be displaced in the same way as the towed roller 3 of FIG. 1 in the Y directions relative to the stationary, but rotatably arranged, driven roller 21.
  • the spacer and drive ring 23 is fixed on the driven roller 21 and can be made of a material that has a favorable coefficient of friction compared to the towed roller 22.
  • the ring can be made of rubber, for example with the brand name "Adilan”.
  • FIGS. 5 and 6 show the pair of stepped rollers shown and described in European patent specification 00 78393 with FIGS. 2 and 4, which is identified by 30 in this application.
  • the pair of stepped rollers 30 comprises a driven stepped roller 31, a towed stepped roller 32 and a spacer and drive ring 33 which, as seen in FIG. 5, of the driven stepped roller 33 is fixedly arranged on the left edge end.
  • This ring is also outside the area in which the sliver is guided and consists of rubber in the same way as described above, for example with the brand name "Adilan”.
  • the drive roller 31 is driven by a drive shaft 34 which is rotatably and drivably mounted in a stationary bearing (not shown).
  • this roller On the opposite side of the shaft 34, this roller has an axis 35, which is also rotatably and drivably mounted in a stationary bearing.
  • the towed stepped roller 32 has an axis 36 and an axis 37, which is each rotatably mounted in movable bearings and can be moved in order to move the towed roller 32 in the directions of movement Y, as mentioned for the towed roller 3 of FIGS. 1 and 2 has been.
  • the sliver is guided in a cross-section which is formed by the stepped rollers and, without sliver, is at a distance A.2 between the opposite stepped rollers due to the spacing and drive ring 33.
  • This distance A.2 is extended to the effective thickness D.2 of the sliver F.2 when a sliver F.2 is inserted.
  • A.2 is chosen so that this distance is a few tenths of a millimeter smaller than the smallest sliver thickness D2 to be processed.
  • These few tenths of a millimeter can be 3 to 4 tenths of a millimeter.
  • FIG. 7 shows the pair of rollers 20 of FIGS. 3 and 4, in which a fiber sliver introduction funnel is additionally provided, by means of which the fiber sliver is introduced into the gap with the distance A.1.
  • the fiber sliver introduction funnel comprises a funnel body 41, within which the funnel opening 56 is provided, which forms the actual guidance of the fiber sliver F.1.
  • the guide funnel 40 In order to suck the fiber sliver into the funnel opening 56 by means of suction air, the guide funnel 40 has an air chamber 42 which is provided around the funnel body 41 and has outlet openings 44 and 45. Through these outlet openings 44 and 45, the compressed air located in the air chamber 42 emerges and flows between the funnel body 41 and the circumference of the ring 28, respectively. along the bottom of the groove 29 into the gap with the distance A.1 and sucks air through the funnel opening 56 as a result of this injector action. With the help of this air sucked in through the opening 56, the sliver F.1 can be sucked into this opening.
  • air inlet nozzles 55 can also be provided, which additionally allow compressed air to enter the funnel opening 56, so that the injector effect is thereby increased.
  • the air chamber 42 is connected by means of a connection line 46 to a changeover valve 47 which is connected on the one hand to a compressed air line 48 and on the other hand to a suction air line 51.
  • the compressed air line 48 is connected to a compressed air source 52 and the suction air line 51 to a suction air source 53.
  • An on-off valve is provided between the compressed air source 52 and the suction air source 53 and the changeover valve 47, specifically for the compressed air with 49 and for the suction air with 50.
  • the switchover of the switchover valve 47 takes place with the aid of a controller 54, which carries out the switchover on the basis of a superordinate pulse.
  • the switchover from compressed air to suction air occurs when the threading or, in other words, the introduction of the fiber sliver into the hopper opening 56 has ended and the fiber sliver is guided regularly, that is to say during operation, by the pair of rollers 20, since at that moment the one carried by the rollers Air in the vicinity of the rollers is no longer desired, so that it can be sucked off with the help of the orifices 44 and 45.
  • FIG. 8 shows the pair of rollers 30 of FIGS. 5 and 6, combined with a sliver introduction funnel 60 and a sliver guide funnel 69, the latter being provided as an optional additive in order to grasp the sliver and, if necessary, to bring it into a predetermined position with the aid of this sliver guide funnel.
  • the fiber sliver insertion funnel 60 comprises a funnel body 61 with a funnel opening 62, by means of which the fiber sliver is guided, pre-compressed, and in this state is introduced into the gap with the distance A.2.
  • the sliver path guide funnel 69 in turn comprises a funnel body 70, in which a funnel opening 71 is provided so tapered that the inlet mouth of the funnel opening 71 is between three to five times wider than the outlet mouth of this funnel opening.
  • air inlet or, in other words, injector nozzles 72 are provided in the hopper body 70, which are arranged so inclined to the conveying direction R of the sliver that the compressed air emerging through these nozzles creates a suction effect in the conveying direction R through the hopper opening 71.
  • the stepped rollers 31 and 32 convey air according to their direction of rotation (shown with the direction of rotation arrows) into the gap with the distance A.2, which with the aid of the suction effect in the Hopper opening 71 is suctioned off.
  • this circumferential air of the stepped rollers sucked off through the mentioned gap, there is also a certain suction effect in the hopper opening 62, by means of which the sliver can be guided into the hopper opening 62.
  • a compressed air line 65 is respectively on both sides of an on and off valve 66. 67 provided, the compressed air line 65 being connected to the air chamber 64 and the compressed air line 67 being connected to a compressed air source 68.
  • a pressure reducing valve (not shown) can also be installed in the compressed air line 67 in order to adjust the air pressure in the air chamber 64.
  • the sliver guide hopper 69 also has an air chamber 73 for supplying the compressed air to the air inlet nozzles 72, which is connected to a compressed air source 77 via a connecting line 74, an on-off valve 75 and a compressed air line 76.
  • a pressure control valve (not shown) can be installed in the compressed air line provided between the compressed air source 77 and the valve 75.
  • angles that the axes of symmetry of the air inlet nozzles 55 and 55 shown in FIGS. 63 resp. 72 with the respective running direction of the sliver must, depending on the conicity of the funnel openings 56 or. 62 resp. 71 be determined empirically.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

To make it possible to introduce slivers (F) between two rollers more effectively, on the driven roller (2) there is a spacing and driving ring (4) which has a height corresponding to the spacing (A). Moreover, this spacing (A) is provided in such a way that it is smaller than the smallest sliver thickness (D in Figure 2), in order to guarantee a compression of the sliver (F) between the rollers to the predetermined extent. The advantage is that, on the one hand, the sliver can be grasped better by means of the nip having the spacing (A), secondly the drag roller (3) rotates at a predetermined rate of rotation as early as when the sliver (F) is being introduced, and furthermore the ambient air of the rotating rollers (2) and (3) can be guided through the nip, thus assisting the drawing in of the sliver. The drag roller (3) is held movably, as represented by the directions of the arrows (Y) in Figure (2). <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum Komprimieren oder zum Ermitteln der Masse eines Faserbandes mit einem Paar gegeneinander pressbaren Walzen.The invention relates to a device for compressing or for determining the mass of a sliver with a pair of rollers that can be pressed against each other.

Komprimier- und Messvorrichtungen für Faserbänder aus Tex­tilfasern beispielsweise im Anschluss an eine Karde oder an eine Strecke sind seit langem bekannt und im Einsatz.Compression and measuring devices for fiber tapes made of textile fibers, for example following a card or on a draw frame, have long been known and in use.

Aus der europäischen Patentschrift Nr. 00 783 93 ist eine Komprimiervorrichtung vorgenannter Art bekannt. Darin sind zwei Keilwalzen gezeigt, welche einen Bereich abgrenzen, innerhalb welchem das Faserband komprimiert wird. Die Mes­sung der Dichte resp. Masse des Faserbandes geschieht da­durch, dass die eine Walze stationär und die andere beweg­bar angeordnet ist und dadurch, dass die Bewegungen der bewegbaren Walze gemessen werden, das heisst, dass mit Hilfe der bewegbaren Walze der Abstand zwischen beiden Walzen im Bereich des Keilspaltes gemessen werden kann.A compression device of the aforementioned type is known from European Patent No. 00 783 93. Two wedge rollers are shown therein, which delimit an area within which the fiber sliver is compressed. The measurement of density or Mass of the fiber sliver takes place in that one roller is arranged to be stationary and the other is movable and in that the movements of the movable roller are measured, that is to say that the distance between the two rollers in the region of the wedge gap can be measured with the aid of the movable roller .

Ohne Faserband liegen die beiden Walzen zwar sehr nahe, jedoch berührungslos einander gegenüber, sodass die ge­schleppte Walze keinen Antrieb erfährt.Without sliver, the two rolls are very close, but contactless, so that the towed roll is not driven.

Dies ist nachteilig für das "Einfädeln" oder, anders aus­gedrückt, Einbringen des Faserbandes zwischen die beiden Walzen, weil dabei die geschleppte Walze primär vom be­schleunigten Faserband beschleunigt werden muss.This is disadvantageous for the "threading" or, in other words, introducing the sliver between the two rollers, because the roller that is being dragged must be accelerated primarily by the accelerated sliver.

Der vorliegenden Erfindung liegt nun die Aufgabe zugrunde, das Einfädeln des Faserbandes zu verbessern.The present invention is based on the object of improving the threading of the sliver.

Diese Aufgabe wurde erfindungsgemäss dadurch gelöst, dass die Walzenoberflächen durch Distanzmittel einen vorgege­benen minimalen gegenseitigen, einen Spalt bildenden Abstand aufweisen, welcher eine vorgegebene Grösse auf­weist, die annähernd der kleinsten zu verarbeitenden Dicke des Faserbandes entspricht.This object has been achieved according to the invention in that the roller surfaces, by means of spacers, form a predetermined minimum mutual gap Have a distance which has a predetermined size, which corresponds approximately to the smallest thickness of the sliver to be processed.

Der Vorteil der Erfindung besteht einerseits darin, dass ein genügend grosser Spalt für das Einfädeln vorhanden ist, welcher einerseits das bessere Erfassen des Faserbandes und andererseits das Durchblasen von Luft für das Fördern des Faserbandes in den Keilspalt erlaubt.The advantage of the invention is, on the one hand, that there is a sufficiently large gap for threading, which on the one hand allows the sliver to be gripped better and on the other hand allows air to be blown through to convey the sliver into the wedge gap.

Wird im weiteren eine der beiden Walzen angetrieben und die andere von der angetriebenen geschleppt und wird erfin­dungsgemäss das Distanzmittel als Distanzring auf einer der beiden Walzen ausgebildet, so besteht ein weiterer Vorteil, dass die geschleppte Walze durch das Distanzmittel auf eine vorgegebene Drehzahl angetrieben werden kann, bevor das Faserband in den Keilspalt gelangt.If one of the two rollers is then driven and the other is dragged by the driven one and if the spacer is designed as a spacer ring on one of the two rollers according to the invention, there is a further advantage that the towed roller can be driven to a predetermined speed by the spacer. before the sliver gets into the wedge gap.

Eine weitere vorteilhafte Ausführungsform der Erfindung besteht darin, dass ausserdem ein Faserbandeinführungs­trichter vorgesehen ist, welcher das Faserband auf ein vorgegebenes Querschnittprofil vorverdichtet und, welcher derart angeordnet ist, dass das Faserband durch die Aus­trittsmündung des Führungstrichters in den genannten vor­gegebenen Keilspalt geführt wird und, dass mindestens ein Luftleitkanal derart vorgesehen ist, dass die darin ge­führte Druckluft eine Injektorwirkung im Führungstrichter erzeugt, welche das Faserband in den Trichter saugt.A further advantageous embodiment of the invention consists in that a sliver introduction funnel is also provided which pre-compresses the sliver to a predetermined cross-sectional profile and which is arranged in such a way that the sliver is guided through the outlet opening of the guide funnel into said predetermined wedge gap and that at least an air duct is provided such that the compressed air guided therein creates an injector effect in the guide funnel, which sucks the fiber sliver into the funnel.

Im weiteren ist es bekannt, dass rotierende Walzen an ihrer Oberfläche, in Bewegungsrichtung dieser Oberflächen bewegte Luft mitführen, welche, beispielsweise dann nachteilig ist, wenn sie im konvergierenden Spalt der beiden Walzen uner­wünscht ist nämlich dann, wenn beispielsweise die Luft nicht zwischen den beiden Walzen durchgeführt wird, sondern in Achsrichtung der Walzen, das heisst mit einer Umlenkung von 90°, entweicht und störenderweise Fasern mittranspor­tiert.Furthermore, it is known that rotating rollers carry air moving on their surface in the direction of movement of these surfaces, which is disadvantageous, for example, if it is undesirable in the converging gap of the two rollers, for example if the air is not between the two rollers is carried out, but in the axial direction of the rollers, that is to say with a deflection of 90 °, escapes and disruptively transports fibers.

Diesem Nachteil hilft erfindungsgemäss eine Ausführungsform ab, in welcher der genannte Luftleitkanal wahlweise auch an einer Saugquelle angeschlossen werden kann, sodass Luft aus dem konvergierenden Spalt abgesaugt werden kann.According to the invention, this disadvantage is remedied by an embodiment in which the air duct mentioned can optionally also be connected to a suction source, so that air can be sucked out of the converging gap.

Weitere vorteilhafte Ausführungsformen sind in den weiteren Ansprüchen aufgeführt.Further advantageous embodiments are listed in the further claims.

Anhand illustrierter Ausführungsbeispiele wird die Erfin­dung näher erläutert. Es zeigen:

  • Figur 1 eine Ansicht eines erfindungsgemässen Walzenpaares
  • Figur 2 das Walzenpaar von Figur 1 in Blickrichtung I gesehen
  • Figur 3 eine Ansicht eines weiteren erfindungsgemässen Walzenpaares
  • Figur 4 das Walzenpaar von Figur 3 in Blickrichtung II gesehen
  • Figur 5 eine Variante des Walzenpaares von Figur 3
  • Figur 6 das Walzenpaar von Figur 5 in Blickrichtung III gesehen
  • Figur 7 das Walzenpaar von Figur 3 im Schnitt entsprechend den Schnittlinien IV (Figur 3) mit einem erfindungsgemässen Zusatz
  • Figur 8 das Walzenpaar von Figur 5 im Schnitt gemäss den Schnittlinien V, mit einem erfindungsgemässen Zusatz.
The invention is explained in more detail on the basis of illustrated exemplary embodiments. Show it:
  • Figure 1 is a view of a pair of rollers according to the invention
  • Figure 2 seen the pair of rollers of Figure 1 in viewing direction I.
  • Figure 3 is a view of a further pair of rollers according to the invention
  • Figure 4 seen the pair of rollers of Figure 3 in viewing direction II
  • FIG. 5 shows a variant of the pair of rollers from FIG. 3
  • Figure 6 seen the pair of rollers of Figure 5 in viewing direction III
  • Figure 7 shows the pair of rollers of Figure 3 in section according to section lines IV (Figure 3) with an additive according to the invention
  • Figure 8 shows the pair of rollers of Figure 5 in section along the section lines V, with an additive according to the invention.

Die Figur 1 zeigt ein Walzenpaar 1, wie es beispielsweise im Zusammenhang mit einem Streckwerk verwendet werden kann. Dabei besteht das Walzenpaar aus einer angetriebenen Walze 2 und einer geschleppten Walze 3.FIG. 1 shows a pair of rollers 1 as can be used, for example, in connection with a drafting system. The pair of rollers consists of a driven roller 2 and a towed roller 3.

Für das Antreiben der geschleppten Walze 3, weist die an­getriebene Walze 2 einen Distanz- und Antriebsring 4 auf, auf welchem der Umfang der geschleppten Walze 3 aufliegt. Wie aus der Bezeichnung dieses Ringes entnehmbar, hat der Ring 4 nicht nur die Aufgabe die Schleppwalze 3 anzutreiben sondern auch noch einen Abstand A zwischen den beiden Wal­zen zu erzeugen. Der Zweck dieses Abstandes A wird später erläutert.For driving the towed roller 3, the driven roller 2 has a spacer and drive ring 4, on which the circumference of the towed roller 3 rests. As can be seen from the designation of this ring, the ring 4 not only has the task of driving the drag roller 3 but also to produce a distance A between the two rollers. The purpose of this distance A will be explained later.

Die angetriebene Walze 2 weist eine Antriebswelle 5 auf, welche in einem stationären Lager 6 drehbar gelagert ist und eine Achse 7, welche in einem stationären Lager 8 ebenfalls drehbar gelagert ist.The driven roller 2 has a drive shaft 5 which is rotatably supported in a stationary bearing 6 and an axis 7 which is also rotatably supported in a stationary bearing 8.

Die geschleppte Walze 3 weist eine Achse 9 auf, welche in einem Lager 10 drehbar gelagert ist sowie eine Achse 11, welche in einem Lager 12 drehbar gelagert ist.The towed roller 3 has an axis 9 which is rotatably mounted in a bearing 10 and an axis 11 which is rotatably supported in a bearing 12.

Die beiden Lager 10 und 12 sind verschiebbar angeordnet um der geschleppten Walze die Möglichkeit zu geben in den Be­wegungsrichtungen Y (Figur 2) von der angetriebenen Walze 2 weg und gegen diese bewegt zu werden.The two bearings 10 and 12 are arranged to be displaceable in order to give the towed roller the possibility in the directions of movement Y (FIG. 2) of the driven roller 2 and to be moved against it.

Der Mechanismus für die Bewegung resp. die Führungen, welche die Lager 10 und 12 aufnehmen, um die Bewegung in der Richtung Y zu erlauben, sind ansich bekannt und nicht näher erläutert.The mechanism for the movement resp. the guides that receive the bearings 10 and 12 to allow movement in the Y direction are known per se and are not explained in detail.

Im Betrieb wird beim Einfädeln, resp. mit anderen Worten ausgedrückt, beim Einführen eines Faserbandes F zwischen die Walzen 2 und 3, die geschleppte Walze 3 in der nach oben gerichteten (mit Blick auf Figur 2 gesehen) Y-Richtung durch das Faserband angehoben, was mit den strichpunk­tierten Linien 3.1 angedeutet ist.In operation, when threading, resp. in other words, when a fiber sliver F is inserted between the rollers 2 and 3, the towed roller 3 is raised in the upward direction (viewed with a view of FIG. 2) in the Y direction through the fiber sliver, which is indicated by the dash-dotted lines 3.1 .

Beim vorgenannten Einführen des Faserbandes weist die ge­schleppte Walze 3 bereits eine Umfangsgeschwindigkeit auf, welche der Umfangsgeschwindigkeit des Distanz- und An­triebringes 4 entspricht.When the sliver is introduced, the dragged roller 3 already has a peripheral speed which corresponds to the peripheral speed of the spacer and drive ring 4.

Um den in Figur 1 gezeigten Querschnitt des mit strich­punktierten Linien dargestellten Faserbandes zu erhalten, weisen Streckwerke vor solchen Walzenpaaren einen soge­nannten Kondensor auf, welcher ansich bekannt ist und hier der Einfachheithalber nicht dargestellt ist.In order to obtain the cross section shown in FIG. 1 of the fiber sliver shown with dash-dotted lines, drafting systems in front of such roller pairs have a so-called condenser, which is known per se and is not shown here for the sake of simplicity.

Der Abstand A zwischen den beiden Walzenoberflächen, das heisst der Oberfläche der Walze 2 und 3, entspricht im we­sentlichen der kleinstmöglichen Dicke D eines Faserbandes F, das heisst etwas präziser ausgedrückt, wenige Zehntels­milimeter weniger als die genannte kleinste Dicke D.The distance A between the two roller surfaces, that is to say the surface of the rollers 2 and 3, corresponds essentially to the smallest possible thickness D of a sliver F, that is to say to put it more precisely, a few tenths of a millimeter less than the smallest thickness D.

Die Figuren 3 bis 8 zeigen Walzenpaare, wie sie grundsätz­lich in der europäischen Patentschrift Nr. 00 783 93 ge­zeigt und beschrieben sind, weshalb nur die wesentlichen Merkmale davon wiederholt werden.FIGS. 3 to 8 show pairs of rollers, as are shown and described in principle in European Patent No. 00 783 93, for which reason only the essential features thereof are repeated.

Die Figur 3 und 4 zeigen ein Walzenpaar 20, wie dies in der vorgenannten europäischen Patentschrift mit den Figuren 1 und 3 dargestellt ist.Figures 3 and 4 show a pair of rollers 20, as shown in the aforementioned European patent with Figures 1 and 3.

Das Walzenpaar 20 umfasst, nochmals kurz erwähnt,eine an­getriebene Stufenwalze 21, eine geschleppte Walze 22, einen in der vorgenannten europäischen Patentschrift nicht ge­zeigten erfinderischen Distanz- und Antriebsring, welcher auf der angetriebenen Walze 21 am rechten äusseren Rand, mit Blick auf Figur 3 gesehen, auf der angetriebenen Walze 21 festangeordnet ist. Auf diese Weise ist der Ring 23 ausserhalb des Bereiches, in welchem ein Faserband F.1 zwischen der angetriebenen und der geschleppten Walze ge­führt wird, was übrigens auch in Figur 1 dargestellt ist.The roller pair 20 comprises, again briefly mentioned, a driven stepped roller 21, a towed roller 22, an inventive spacer and drive ring, not shown in the aforementioned European patent specification, which is seen on the driven roller 21 on the right outer edge, with a view of FIG. 3 is firmly arranged on the driven roller 21. In this way, the ring 23 is outside the area in which a sliver F.1 is guided between the driven and the towed roller, which is also shown in FIG. 1.

Der Distanz- und Antriebsring 23 weist eine Höhe auf, wel­ che den Abstand A1 (Figur 3) zwischen einem Ring 28 und der Grundfläche einer Ringnute 29 ergibt. Dabei ist der Ring 28 Bestandteil der geschleppten Walze 22 und die Ringnute 29 ist in der angetriebenen Walze 21, wie in der vorgenannten europäischen Patentschrift erwähnt, vorgesehen um im Be­reich des Spaltes A.1 das Faserband zu komprimieren, resp. die Masse des Faserbandes zu messen.The spacer and drive ring 23 has a height, wel che the distance A1 (Figure 3) between a ring 28 and the base of an annular groove 29 results. The ring 28 is part of the dragged roller 22 and the ring groove 29 is provided in the driven roller 21, as mentioned in the aforementioned European patent, in order to compress the sliver in the area of the gap A.1, respectively. to measure the mass of the sliver.

Zu diesem Zweck ist die geschleppte Walze 22 in gleicher Weise, wie die geschleppte Walze 3 der Figur 1 in den Y-­Richtungen gegenüber der stationären, jedoch drehbar ange­ordneten angetriebenen Walze 21, verschiebbar.For this purpose, the towed roller 22 can be displaced in the same way as the towed roller 3 of FIG. 1 in the Y directions relative to the stationary, but rotatably arranged, driven roller 21.

Der Distanz- und Antriebsring 23 ist fest auf der angetrie­benen Walze 21 angeordnet und kann aus einem Material her­gestellt werden, welches einen günstigen Reibkoeffizienten gegenüber der geschleppten Walze 22 aufweist.Der Ring kann aus Gummi hergestellt werden, beispielsweise mit dem Mar­kennamen "Adilan".The spacer and drive ring 23 is fixed on the driven roller 21 and can be made of a material that has a favorable coefficient of friction compared to the towed roller 22. The ring can be made of rubber, for example with the brand name "Adilan".

Dasselbe gilt für den im Zusammenhang mit Figur 1 darge­stellten Ring 4.The same applies to the ring 4 shown in connection with FIG. 1.

Die Figuren 5 und 6 zeigen die in der europäischen Patent­schrift 00 78393 mit den Figuren 2 und 4 gezeigten und be­schriebenen Stufenwalzenpaar, welches in dieser Anmeldung mit 30 gekennzeichnet ist.FIGS. 5 and 6 show the pair of stepped rollers shown and described in European patent specification 00 78393 with FIGS. 2 and 4, which is identified by 30 in this application.

Das Stufenwalzenpaar 30 umfasst eine angetriebene Stufen­walze 31, eine geschleppte Stufenwalze 32 sowie einen Di­stanz- und Antriebsring 33, welcher am linken Randende, mit Blick auf Figur 5 gesehen, der angetriebenen Stufenwalze 33, fest angeordnet ist. Auch dieser Ring ist ausserhalb des Bereiches, in welchem das Faserband geführt ist und besteht in gleicher Weise, wie vorbeschrieben aus Gummi, beispielsweise mit dem Markennamen "Adilan".The pair of stepped rollers 30 comprises a driven stepped roller 31, a towed stepped roller 32 and a spacer and drive ring 33 which, as seen in FIG. 5, of the driven stepped roller 33 is fixedly arranged on the left edge end. This ring is also outside the area in which the sliver is guided and consists of rubber in the same way as described above, for example with the brand name "Adilan".

Die Antriebswalze 31 wird durch eine Antriebswelle 34 an­getrieben, welche in einem stationären Lager, (nicht dar­gestellt) dreh und antreibbar gelagert ist.The drive roller 31 is driven by a drive shaft 34 which is rotatably and drivably mounted in a stationary bearing (not shown).

Auf der gegenüberliegenden Seite der Welle 34 weist diese Walze eine Achse 35 auf, die ebenfalls in einem stationären Lager, dreh- und antreibbar gelagert ist.On the opposite side of the shaft 34, this roller has an axis 35, which is also rotatably and drivably mounted in a stationary bearing.

Die geschleppte Stufenwalze 32 weist eine Achse 36 und eine Achse 37 auf, welche je in bewegbaren Lagern drehbar gela­gert ist und zwar bewegbar um die geschleppte Walze 32 in den Bewegungsrichtungen Y zu bewegen, wie dies für die ge­schleppte Walze 3 der Figuren 1 und 2 erwähnt wurde.The towed stepped roller 32 has an axis 36 and an axis 37, which is each rotatably mounted in movable bearings and can be moved in order to move the towed roller 32 in the directions of movement Y, as mentioned for the towed roller 3 of FIGS. 1 and 2 has been.

Das Faserband wird wie mit Figur 3 gezeigt in einem Quer­schnitt geführt, welcher durch die Stufenwalzen gebildet wird und ohne Faserband aufgrund des Distanz- und An­triebsringes 33 einen Abstand A.2 zwischen den gegenüber­liegenden Stufenwalzen aufweist. Dieser Abstand A.2 wird beim Einführen eines Faserbandes F.2 auf die effektive Dicke D.2 des Faserbandes F.2 erweitert.As shown in FIG. 3, the sliver is guided in a cross-section which is formed by the stepped rollers and, without sliver, is at a distance A.2 between the opposite stepped rollers due to the spacing and drive ring 33. This distance A.2 is extended to the effective thickness D.2 of the sliver F.2 when a sliver F.2 is inserted.

A.2 wird dabei so gewählt, dass dieser Abstand wenige Zehn­telsmilimeter kleiner ist als die kleinste zu verarbeitende Faserbanddicke D2.A.2 is chosen so that this distance is a few tenths of a millimeter smaller than the smallest sliver thickness D2 to be processed.

Bei diesen wenigen Zehntelsmilimetern kann es sich um 3 bis 4 Zehntelsmilimeter handeln.These few tenths of a millimeter can be 3 to 4 tenths of a millimeter.

Die Figur 7 zeigt das Walzenpaar 20 der Figuren 3 und 4, bei welchem zusätzlich noch ein Faserbandeinführungstrich­ter vorgesehen ist, mittels welchem das Faserband in den Spalt mit dem Abstand A.1 eingeführt wird.FIG. 7 shows the pair of rollers 20 of FIGS. 3 and 4, in which a fiber sliver introduction funnel is additionally provided, by means of which the fiber sliver is introduced into the gap with the distance A.1.

Der Faserbandeinführungstrichter umfasst einen Trichter­körper 41, innerhalb welchem die Trichteröffnung 56 vorge­sehen ist, welche die eigentliche Führung des Faserbandes F.1 bildet.The fiber sliver introduction funnel comprises a funnel body 41, within which the funnel opening 56 is provided, which forms the actual guidance of the fiber sliver F.1.

Um das Faserband mittels Saugluft in die Trichteröffnung 56 zu saugen, weist der Führungstrichter 40 eine Luftkammer 42 auf, welche um den Trichterkörper 41 vorgesehen ist und Austrittsmündungen 44 und 45 aufweist. Durch diese Aus­trittsmündungen 44 und 45 tritt die sich in der Luftkammer 42 befindliche Druckluft aus und strömt zwischen dem Trich­terkörper 41 und dem Umfang des Ringes 28 resp. dem Grund der Nute 29 entlang in den Spalt mit dem Abstand A.1 und saugt durch diese Injektorwirkung Luft durch die Trichter­öffnung 56. Mit Hilfe dieser durch die Oeffnung 56 ange­saugte Luft kann das Faserband F.1 in diese Oeffnung ein­gesaugt werden.In order to suck the fiber sliver into the funnel opening 56 by means of suction air, the guide funnel 40 has an air chamber 42 which is provided around the funnel body 41 and has outlet openings 44 and 45. Through these outlet openings 44 and 45, the compressed air located in the air chamber 42 emerges and flows between the funnel body 41 and the circumference of the ring 28, respectively. along the bottom of the groove 29 into the gap with the distance A.1 and sucks air through the funnel opening 56 as a result of this injector action. With the help of this air sucked in through the opening 56, the sliver F.1 can be sucked into this opening.

Hilfsweise können noch Lufteintrittsdüsen 55 vorgesehen werden, welche noch Druckluft zusätzlich in die Trichter­öffnung 56 eintreten lassen, sodass die Injektorwirkung dadurch noch verstärkt wird.In the alternative, air inlet nozzles 55 can also be provided, which additionally allow compressed air to enter the funnel opening 56, so that the injector effect is thereby increased.

Inwiefern diese letztgenannten Lufteintrittsdüsen 55 benö­tigt werden hängt von der Geometrie des gesamten Führungs­trichters und der Walzen ab und muss von Fall zu Fall fest­gelegt werden.The extent to which these latter air inlet nozzles 55 are required depends on the geometry of the entire guide funnel and the rollers and must be determined on a case-by-case basis.

Die Luftkammer 42 ist mittels einer Anschlussleitung 46 an ein Umschaltventil 47 angeschlossen, welches einerseits mit einer Druckluftleitung 48 und andererseits mit einer Saug­luftleitung 51 verbunden ist.The air chamber 42 is connected by means of a connection line 46 to a changeover valve 47 which is connected on the one hand to a compressed air line 48 and on the other hand to a suction air line 51.

Die Druckluftleitung 48 ist an eine Druckluftquelle 52 und die Saugluftleitung 51 an eine Saugluftquelle 53 ange­schlossen. Zwischen der Druckluftquelle 52 und der Saug­luftquelle 53 und dem Umschaltventil 47 ist je ein Ein-­Aus-Ventil vorgesehen und zwar ist dieses für die Druckluft mit 49 und für die Saugluft mit 50 gekennzeichnet.The compressed air line 48 is connected to a compressed air source 52 and the suction air line 51 to a suction air source 53. An on-off valve is provided between the compressed air source 52 and the suction air source 53 and the changeover valve 47, specifically for the compressed air with 49 and for the suction air with 50.

Das Umschalten des Umschaltventiles 47 geschieht mit Hilfe einer Steuerung 54, welche das Umschalten aufgrund eines übergeordneten Impulses durchführt.The switchover of the switchover valve 47 takes place with the aid of a controller 54, which carries out the switchover on the basis of a superordinate pulse.

Das Umschalten von Druckluft auf Saugluft geschieht dann, wenn das Einfädeln oder anders ausgedrückt das Einführen des Faserbandes in die Trichteröffnung 56 beendet ist und das Faserband regulär, das heisst im Betrieb durch das Walzenpaar 20 geführt wird, da in diesem Moment die von den Walzen mitgeführte Luft an der Umgebung der Walzen nicht mehr erwünscht ist, sodass diese mit Hilfe der Mündungen 44 und 45 abgesaugt werden kann.The switchover from compressed air to suction air occurs when the threading or, in other words, the introduction of the fiber sliver into the hopper opening 56 has ended and the fiber sliver is guided regularly, that is to say during operation, by the pair of rollers 20, since at that moment the one carried by the rollers Air in the vicinity of the rollers is no longer desired, so that it can be sucked off with the help of the orifices 44 and 45.

Die Figur 8 zeigt das Walzenpaar 30 der Figuren 5 und 6, kombiniert mit einem Faserbandeinführungstrichter 60 und einem Faserbandwegführtrichter 69, wobei der Letztere als fakultativer Zusatz vorgesehen ist, um das Faserband zu erfassen und gegebenenfalls mit Hilfe dieses Faserbandweg­führtrichters in eine vorgegebene Position zu bringen.FIG. 8 shows the pair of rollers 30 of FIGS. 5 and 6, combined with a sliver introduction funnel 60 and a sliver guide funnel 69, the latter being provided as an optional additive in order to grasp the sliver and, if necessary, to bring it into a predetermined position with the aid of this sliver guide funnel.

Der Faserbandeinführtrichter 60 umfasst einen Trichterkör­per 61 mit einer Trichteröffnung 62, mittels welcher das Faserband geführt, vorverdichtet, und in diesem Zustande in den Spalt mit dem Abstand A.2 gegeben wird.The fiber sliver insertion funnel 60 comprises a funnel body 61 with a funnel opening 62, by means of which the fiber sliver is guided, pre-compressed, and in this state is introduced into the gap with the distance A.2.

Der Faserbandwegführtrichter 69 umfasst seinerseits einen Trichterkörper 70, in welchem eine Trichteröffnung 71 der­art verjüngt vorgesehen ist, dass die Eintrittsmündung der Trichteröffnung 71 zwischen dem drei- bis fünffachen weiter ist, als die Austrittsmündung dieser Trichteröffnung.The sliver path guide funnel 69 in turn comprises a funnel body 70, in which a funnel opening 71 is provided so tapered that the inlet mouth of the funnel opening 71 is between three to five times wider than the outlet mouth of this funnel opening.

Im weiteren sind im Trichterkörper 70 Lufteintritts- oder anders ausgedrückt Injektordüsen 72 vorgesehen, welche derart geneigt zur Förderrichtung R des Faserbandes ange­ordnet sind, dass die durch diese Düsen austretende Druck­luft eine Saugwirkung in Förderrichtung R durch die Trich­teröffnung 71 erzeugt.In addition, air inlet or, in other words, injector nozzles 72 are provided in the hopper body 70, which are arranged so inclined to the conveying direction R of the sliver that the compressed air emerging through these nozzles creates a suction effect in the conveying direction R through the hopper opening 71.

Wie bereits früher erwähnt, fördern die Stufenwalzen 31 und 32 entsprechend ihrer Drehrichtung (dargestellt mit den Drehrichtungspfeilen) Luft in den Spalt mit dem Abstand A.2, welche mit Hilfe der Saugwirkung in der Trichteröffnung 71 abgesaugt wird. Mit Hilfe dieser durch den genannten Spalt abgesaugten Umfangsluft der Stufenwal­zen entsteht ebenfalls eine gewisse Saugwirkung in der Trichteröffnung 62, mittels welcher das Faserband in die Trichteröffnung 62 geführt werden kann.As mentioned earlier, the stepped rollers 31 and 32 convey air according to their direction of rotation (shown with the direction of rotation arrows) into the gap with the distance A.2, which with the aid of the suction effect in the Hopper opening 71 is suctioned off. With the help of this circumferential air of the stepped rollers sucked off through the mentioned gap, there is also a certain suction effect in the hopper opening 62, by means of which the sliver can be guided into the hopper opening 62.

Genügt dieser Unterdruck nicht, um das Faserband durch die richteröffnung 62 zu führen, so können, wie mit den strich­punktierten Linien dargestellt, zusätzliche Lufteintritts- oder anders ausgedrückt Injektordüsen 63 vorgesehen werden. Mittels der aus diesen Düsen austretenden Luft wird der Unterdruck in der Trichteröffnung verstärkt, sodass das Faserband durch die Trichteröffnung 62 und in den mit dem Abstand A.2 gegebenen Spalt geführt werden kann.If this negative pressure is not sufficient to guide the fiber sliver through the straightening opening 62, additional air inlet or, in other words, injector nozzles 63 can be provided, as shown by the dash-dotted lines. The negative pressure in the funnel opening is increased by means of the air emerging from these nozzles, so that the fiber sliver can be guided through the funnel opening 62 and into the gap given with the distance A.2.

Für die Zufuhr der Druckluft in die Luftkammer 64 ist beid­seits eines Ein- und Aus-Ventiles 66 eine Druckluftleitung 65 resp. 67 vorgesehen, wobei die Druckluftleitung 65 mit der Luftkammer 64 und die Druckluftleitung 67 mit einer Druckluftquelle 68 verbunden ist.For the supply of the compressed air in the air chamber 64, a compressed air line 65 is respectively on both sides of an on and off valve 66. 67 provided, the compressed air line 65 being connected to the air chamber 64 and the compressed air line 67 being connected to a compressed air source 68.

Zusätzlich zum Ein- Aus-Ventil 66 kann in der Druckluft­leitung 67 noch ein Druckreduzierventil (nicht gezeigt) eingebaut werden, um den Luftdruck in der Luftkammer 64 einzustellen.In addition to the on-off valve 66, a pressure reducing valve (not shown) can also be installed in the compressed air line 67 in order to adjust the air pressure in the air chamber 64.

Dasselbe gilt auch für die in Figur 7 gezeigte Druckluft­anlage in dem jeweils zwischen der Druckluftquelle 52 und dem Ventil 49 und der Saugluftquelle 53 und dem Ventil 50 je ein Druckreduzierventil eingebaut wird.The same also applies to the compressed air system shown in FIG. 7, in each of which a pressure reducing valve is installed between the compressed air source 52 and the valve 49 and the suction air source 53 and the valve 50.

Der Faserbandwegführtrichter 69 weist für die Zufuhr der Druckluft in die Lufteintrittsdüsen 72 ebenfalls eine Luftkammer 73 auf, welche über eine Anschlussleitung 74, einen Ein- Aus-Ventil 75 und einer Druckluftleitung 76 mit einer Druckluftquelle 77 verbunden ist.The sliver guide hopper 69 also has an air chamber 73 for supplying the compressed air to the air inlet nozzles 72, which is connected to a compressed air source 77 via a connecting line 74, an on-off valve 75 and a compressed air line 76.

Auch in diesem Falle kann ein nicht gezeigtes Druckregel­ventil in die zwischen der Druckluftquelle 77 und dem Ven­til 75 vorgesehene Druckluftleitung eingebaut werden.In this case too, a pressure control valve (not shown) can be installed in the compressed air line provided between the compressed air source 77 and the valve 75.

Die Winkel, welche die Symetrieachsen der in den Figuren 7 und 8 gezeigten Lufteintrittsdüsen 55 resp. 63 resp. 72 mit der jeweiligen Laufrichtung des Faserbandes einschliessen müssen je nach Konizität der Trichteröffnungen 56 resp. 62 resp. 71 empirisch festgelegt werden.The angles that the axes of symmetry of the air inlet nozzles 55 and 55 shown in FIGS. 63 resp. 72 with the respective running direction of the sliver must, depending on the conicity of the funnel openings 56 or. 62 resp. 71 be determined empirically.

LegendeLegend

  • 1 Walzenpaar1 pair of rollers
  • 2 angetriebene Walze2 driven roller
  • 3, 3.1 geschleppte Walze3, 3.1 dragged roller
  • 4 Distanz- und Antriebsring4 spacer and drive ring
  • 5 Antriebswelle5 drive shaft
  • 6 stationäres Lager6 stationary warehouse
  • 7 Achse7 axis
  • 8 stationäres Lager8 stationary warehouse
  • 9 Achse9 axis
  • 10 Lager10 bearings
  • 11 Achse11 axis
  • 12 Lager12 bearings
  • 1313
  • 1414
  • 1515
  • 1616
  • 1717th
  • 1818th
  • 1919th
  • 20 Walzenpaar20 pairs of rollers
  • 21 angetriebene Walze21 driven roller
  • 22 geschleppte Walze22 towed roller
  • 23 Distanz- und Antriebsring23 Spacer and drive ring
  • 24 Antriebswelle24 drive shaft
  • 25 Achse25 axis
  • 26 Achse26 axis
  • 27 Achse27 axis
  • 28 Ring28 ring
  • 29 Ringnute29 ring groove
  • 30 Stufenwalzenpaar30 pair of step rollers
  • 31 angetriebene Stufenwalze31 driven step roller
  • 32 geschleppte Stufenwalze32 towed step roller
  • 33 Distanz- und Antriebsring33 Spacer and drive ring
  • 34 Antriebswelle34 drive shaft
  • 35 Achse35 axis
  • 36 Achse36 axis
  • 37 Achse37 axis
  • 40 Faserband-Einführtrichter40 sliver insertion funnels
  • 41 Trichterkörper41 funnel body
  • 42 Luftkammer42 air chamber
  • 43 Aussenwand43 outer wall
  • 44 Austrittsmündung44 outlet mouth
  • 45 Austrittsmündung45 outlet mouth
  • 46 Austrittsmündung46 outlet mouth
  • 47 Umschaltventil47 changeover valve
  • 48 Druckluftleitung48 compressed air line
  • 49 Ein- Aus-Ventil für Druckluft49 On-off valve for compressed air
  • 50 Ein- Aus-Ventil für Saugluft50 on-off valve for suction air
  • 51 Saugluftleitung51 Suction air line
  • 52 Druckluftleitung52 Compressed air line
  • 53 Saugluftquelle53 Suction air source
  • 54 Steuerung54 Control
  • 55 Lufteintritts- oder Injektordüse55 Air inlet or injector nozzle
  • 56 Trichteröffnung56 funnel opening
  • 60 Faserband-Einführtrichter60 sliver insertion funnels
  • 61 Trichterkörper61 funnel body
  • 62 Trichteröffnung62 funnel opening
  • 63 Lufteintritts- oder Injektordüsen63 air inlet or injector nozzles
  • 64 Luftkammer64 air chamber
  • 65 Anschlussleitung65 connecting cable
  • 66 Ein- Aus-Ventil66 On-off valve
  • 67 Druckluftleitung67 Compressed air line
  • 68 Druckluftquelle68 Compressed air source
  • 69 Faserbandwegführtrichter69 sliver path guide funnels
  • 70 Trichterkörper70 funnel bodies
  • 71 Trichteröffnung71 funnel opening
  • 72 Lufteintritts- oder Injektordüse72 Air inlet or injector nozzle
  • 73 Luftkammer73 air chamber
  • 74 Anschlussleitung74 connecting cable
  • 75 Ein- Aus-Ventil75 On-off valve
  • 76 Druckluftleitung76 Compressed air line
  • 77 Druckluftquelle77 Compressed air source

Claims (9)

1. Vorrichtung zum kontinuierlichen Komprimieren oder zum Ermitteln der Masse eines Faserbandes mit einem Paar gegeneinander pressbaren Walzen, dadurch gekennzeich­net, dass
die Walzenoberflächen durch Distanzmittel einen vorge­gebenen minimalen gegenseitigen, einen Spalt bildenden Abstand aufweisen, welcher eine vorgegebene Grösse hat, die annähernd der kleinsten zu verarbeitenden Dicke des Faserbandes entspricht.1. A device for continuous compression or for determining the mass of a sliver with a pair of rollers that can be pressed against each other, characterized in that
the roller surfaces have a predetermined minimum mutual, gap-forming distance, which has a predetermined size which approximately corresponds to the smallest thickness of the fiber sliver to be processed, by means of distance means. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass
eine der beiden Walzen angetrieben und die andere von der angetriebenen geschleppt wird und, dass das Di­stanzmittel ein Distanzring auf einer der beiden Walzen ist, welcher ausserhalb eines Bereiches angeordnet ist, innerhalb welchem das Faserband liegt.2. Device according to claim 1, characterized in that
one of the two rolls is driven and the other is towed by the driven one and that the spacer is a spacer ring on one of the two rolls, which is arranged outside an area within which the sliver lies. 3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass
ausserdem ein Faserbandeinführungstrichter vorgesehen ist, welcher das Faserband auf ein vorgegebenes Quer­schnittprofil vorverdichtet und, welcher derart ange­ordnet ist, dass das Faserband durch die Austrittsmün­dung des Führungstrichters in den genannten vorgege­benen Spalt geführt wird und, dass mindestens ein Luftleitkanal derart vorgesehen ist, dass die darin geführte Druckluft eine Injektorwirkung im Trichter­querschnitt erzeugt, welche das Faserband in den Trichterquerschnitt saugt.3. Device according to claim 1, characterized in that
In addition, a sliver introduction funnel is provided, which pre-compresses the sliver to a predetermined cross-sectional profile and which is arranged in such a way that the sliver is guided through the outlet opening of the guide funnel into the specified predetermined gap and that at least one air duct is provided in such a way that the duct guided therein Compressed air creates an injector effect in the funnel cross section, which sucks the sliver into the funnel cross section. 4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass
der Luftleitkanal am Führungstrichter vorgesehen ist.4. The device according to claim 3, characterized in that
the air duct is provided on the guide funnel. 5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass
der Luftleitkanal derart am Umfang des Führungstrich­ters vorgesehen ist, dass die Injektorluft am Umfang der Walzen und in dessen Umfangsrichtung in den Spalt geblasen wird.5. The device according to claim 4, characterized in that
the air duct is provided on the circumference of the guide funnel in such a way that the injector air is blown into the gap on the circumference of the rollers and in the circumferential direction thereof. 6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass
der Luftleitkanal auch zum Absaugen der durch den be­wegten Umfang der Walzen geförderten Luft verwendet wird.6. The device according to claim 5, characterized in that
the air duct is also used to extract the air conveyed by the moving circumference of the rollers. 7. Vorrichtung nach Anspruch 5 und 6, dadurch gekenn­zeichnet, dass
ein Umschaltventil vorgesehen ist, mittels welchem von Druckluft auf Saugluft umgeschaltet wird.7. The device according to claim 5 and 6, characterized in that
a switchover valve is provided, by means of which a switchover is made from compressed air to suction air. 8. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass
der Luftleitkanal in den Führungstrichter mündet.8. The device according to claim 4, characterized in that
the air duct opens into the guide funnel. 9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass
der Luftleitkanal auf der gegenüberliegenden Seite des Führungstrichters derart anschliessend gegen den Spalt gerichtet ist, dass Luft durch den Führungstrichter und durch den Spalt gesaugt wird.9. The device according to claim 8, characterized in that
the air duct on the opposite side of the guide funnel is then directed against the gap in such a way that air is drawn through the guide funnel and through the gap.
EP19900117028 1989-09-15 1990-09-05 Apparatus for the continuous condensing or the control of the fibre ribbon mass Expired - Lifetime EP0417614B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3363/89 1989-09-15
CH336389A CH680225A5 (en) 1989-09-15 1989-09-15

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EP0417614A1 true EP0417614A1 (en) 1991-03-20
EP0417614B1 EP0417614B1 (en) 1994-02-02

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CH (1) CH680225A5 (en)
DE (1) DE59004495D1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0493343A1 (en) * 1990-12-21 1992-07-01 SANT'ANDREA NOVARA S.p.A. A device for manipulating an end of a sliver of textile fibres
DE4230317A1 (en) * 1992-09-10 1994-03-17 Rieter Ag Maschf Sliver jet spinner having each section set for optimum performance
US6581248B1 (en) 1997-01-23 2003-06-24 Maschinenfabrik Rieter Ag Carding machine with drawing rollers at the outlet

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE503595A (en) * 1950-05-30
FR2319724A1 (en) * 1975-07-28 1977-02-25 Rosique Gracia Zacarias Fibre carding device has operating speed controlled - in dependence on variations in thickness of fibre lap
FR2381118A1 (en) * 1977-02-17 1978-09-15 Heberlein Hispano Sa Pressing rollers for textile fibre strand - permits high speed working without entanglement or over-densification of strand
EP0192835A1 (en) * 1985-02-15 1986-09-03 Maschinenfabrik Rieter Ag Apparatus for the continuous mass control of a fibre ribbon
FR2597119A1 (en) * 1986-04-10 1987-10-16 Zinser Textilmaschinen Gmbh TAPE GUIDE CONDUIT BETWEEN OUTPUT CYLINDERS AND CALENDER CYLINDERS IN A SPINNING PREPARATION MACHINE

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE503595A (en) * 1950-05-30
FR2319724A1 (en) * 1975-07-28 1977-02-25 Rosique Gracia Zacarias Fibre carding device has operating speed controlled - in dependence on variations in thickness of fibre lap
FR2381118A1 (en) * 1977-02-17 1978-09-15 Heberlein Hispano Sa Pressing rollers for textile fibre strand - permits high speed working without entanglement or over-densification of strand
EP0192835A1 (en) * 1985-02-15 1986-09-03 Maschinenfabrik Rieter Ag Apparatus for the continuous mass control of a fibre ribbon
FR2597119A1 (en) * 1986-04-10 1987-10-16 Zinser Textilmaschinen Gmbh TAPE GUIDE CONDUIT BETWEEN OUTPUT CYLINDERS AND CALENDER CYLINDERS IN A SPINNING PREPARATION MACHINE

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0493343A1 (en) * 1990-12-21 1992-07-01 SANT'ANDREA NOVARA S.p.A. A device for manipulating an end of a sliver of textile fibres
DE4230317A1 (en) * 1992-09-10 1994-03-17 Rieter Ag Maschf Sliver jet spinner having each section set for optimum performance
DE4230317C2 (en) * 1992-09-10 1998-07-23 Rieter Ag Maschf Double apron drafting system for a spinning machine
US6581248B1 (en) 1997-01-23 2003-06-24 Maschinenfabrik Rieter Ag Carding machine with drawing rollers at the outlet

Also Published As

Publication number Publication date
CH680225A5 (en) 1992-07-15
DE59004495D1 (en) 1994-03-17
EP0417614B1 (en) 1994-02-02

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