EP0279434B1 - Method and apparatus for improving a yarn produced in the rotor of an open-end spinning machine - Google Patents

Method and apparatus for improving a yarn produced in the rotor of an open-end spinning machine Download PDF

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Publication number
EP0279434B1
EP0279434B1 EP88102323A EP88102323A EP0279434B1 EP 0279434 B1 EP0279434 B1 EP 0279434B1 EP 88102323 A EP88102323 A EP 88102323A EP 88102323 A EP88102323 A EP 88102323A EP 0279434 B1 EP0279434 B1 EP 0279434B1
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EP
European Patent Office
Prior art keywords
yarn
false twist
pull
twist
edge
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Expired - Lifetime
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EP88102323A
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German (de)
French (fr)
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EP0279434A1 (en
Inventor
Heinz-Georg Wassenhoven
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Oerlikon Textile GmbH and Co KG
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W Schlafhorst AG and Co
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/02—Spinning or twisting arrangements for imparting permanent twist
    • D01H7/90—Arrangements with two or more spinning or twisting devices of different types in combination
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
    • D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor

Definitions

  • the invention relates to a method for improving a yarn produced in a rotor of an open-end spinning device with real wire, the yarn following a deflection following the yarn withdrawal direction of the yarn take-off nozzle on at least one false twist edge arranged obliquely to the thread path, a further deflection at another, at an angle to False twist edge arranged in the thread path is experienced, which deflects the yarn in a direction deviating from the direction of the previous deflection, which is then drawn off by a pair of draw-off rollers, and a device for carrying out the method.
  • DE-A1 36 09 114 which does not form part of the prior art, shows a device for open-end spinning, in which a deflection is arranged after the yarn take-off nozzle in the yarn take-off direction and has at least one false twist edge. After the deflection following the yarn draw-off nozzle, there is a further deflection which deflects the yarn in a direction deviating from the direction of the preceding deflection. With the false twist edge of the first deflection, which lies obliquely in the withdrawal path of the thread and has approximately an inclination which corresponds to the rotation of the thread, it is achieved that the false wire generated by the withdrawal nozzle cannot easily overcome this edge.
  • a false twist edge has the result that there is a greater twist in the thread between this edge and the withdrawal groove of the rotor. This increases the spinning stability, which means that the risk of thread breakage in the thread collecting channel is reduced.
  • the articles made from this yarn are characterized by a somewhat hard grip.
  • DE-A1 35 39 383 discloses the use of a cyclone flow to produce a false wire that reinforces the real wire.
  • Fibers are wrapped around the thread, creating so-called abdominal bandages. This does not produce a hairy yarn.
  • the invention has for its object to improve the spinning result of an open-end spinning device and to give the fabric made from the spun yarn, in particular knitwear or knitwear, a soft feel.
  • this object is achieved by a method according to claim 1.
  • the yarn Before the point of application of the cyclone flow, the yarn receives a stronger wire, after the point of application a weaker wire.
  • a thread balloon is generated in the yarn piece running between the cyclone flow and the clamping point formed by the pair of draw-off rollers. Due to the centrifugal forces in the less twisted yarn, outer fiber ends are spread apart from the fiber structure. As a result of the outer fiber ends being spread apart, the yarn thus produced is advantageously distinguished by a higher hairiness and leads the finished article to the desired softer feel.
  • the object of the invention is achieved in that between the last false twist edge and the pair of draw-off rollers of a device known from DE-A1 36 09 114, a false-wire device traversed by the yarn it is arranged that the false wire device has a device for generating a cyclone flow rotating about the longitudinal axis of the yarn and that between the false wire device and the clamping point formed by the pair of draw-off rollers there is a distance from the pair of draw-off rollers which enables the yarn piece to form a fiber-spreading thread balloon.
  • the outer thread ends spread out in the part of the fiber structure in which there is a weaker twist, and this is the cause of the greater hairiness, which leads to a softer feel in the finished article, which is particularly advantageous in the case of knitted fabrics and knitted fabrics.
  • the yarn take-off speed can be high with a relatively low twist, so that the invention also increases the productivity of the open-end spinning device, the overall spinning result being better than in the prior art.
  • the device for generating the cyclone flow advantageously has a tube through which the yarn passes, into which at least one tangential duct carrying compressed air opens.
  • the direction of rotation of the cyclone coincides with the direction of rotation of the real wire of the yarn, so that the feed-side yarn section has a false wire reinforcing the real wire.
  • the drawing shows a longitudinal section through a device according to the invention.
  • the open-end spinning device designated as a whole by 1, has a rotor 2, in the fiber collecting groove 3 of which spinning fibers are continuously introduced in a manner not shown here, while the rotor interior in the direction of arrow 4 over the rotor edge 5 and under a cover 6 covering the rotor 2 is continuously vented through.
  • a yarn take-off nozzle 7 is inserted centrally in the cover 6, to which a pipe 9 bent from the thread course is connected to one side, here upwards, with the interposition of a yarn guide funnel 8.
  • the tube 9 has three consecutive, oblique to the thread run, the free tube cross-section, which is circular in the rest, on the tube curvature line 10 having the smallest radius of curvature constricting false twist edges 11, 12, 13.
  • the false twist edges 11, 12, 13 are formed by pins, the bores lying at an angle to the thread path and penetrating the tubular jacket are inserted in such a way that they protrude from the tube jacket line 10 having the smallest radius of curvature into the free cross section of the tube 9, as the drawing shows, in particular using the example of the false twist edge 11.
  • the tube 9 is pressed into a cylindrical socket 16 of the cover 6 with the addition of a sealing ring 15.
  • another false twist edge 14 which is also arranged obliquely to the thread run. It directs the yarn 17 produced in the rotor 2, which first passes through the yarn take-off nozzle 7, is then deflected upward from its running direction by the false twist edges 11, 12 and 13, now again to the opposite side from its direction.
  • the false twist edge 14 is located at the sloping end of another tube 18 on the yarn input side, which extends into the tube 9 at an angle to the tube axis of the tube 9.
  • a pneumatic false wire device 19 connects to the tube 18.
  • the yarn 17 passes through the false wire device 19 and then through a pair of draw-off rollers 20, 21.
  • the draw-off roller 20 can be driven by means of a shaft 22 in the direction of the arrow 23, while the draw-off roller 21 with a pressing force as a contact roller running against friction against the draw-off roller 20 or the yarn 17 can be created.
  • the yarn 17 After passing through the pair of draw rollers 20, 21, the yarn 17 is wound into a bobbin in a manner not shown here.
  • the pneumatic false wire device 19 consists of a cladding tube 24 into which an annular channel 25 is incorporated.
  • the cladding tube 24 is pressed onto the tube 18. It has a tubular swirl insert 26 which serves as a device for generating a cyclone flow Z and which has four tangential channels 27 which extend slightly at an angle to the yarn running direction at the level of the ring channel 25.
  • the swirl insert 26 is held in the cladding tube 24 by a screw connection 28.
  • the screw connection 28 carries a yarn outlet tube 29 which is widened like a funnel toward the yarn outlet side.
  • the cladding tube 24 has a threaded bore into which a hose connection piece 30 is screwed.
  • a compressed air hose 31 terminates in the hose connecting piece and leads to a compressed air source via a switchable valve (not shown here).
  • the yarn take-off direction is indicated by an arrow 32.
  • the false twist edges 11 to 14 are aligned so that their direction coincides with the direction of the yarn wire present on the respective edge.
  • the orientation of the tangential channels 27 also takes into account the yarn wire, so that the cyclone flow Z acts clockwise on the yarn 17 with right-hand wire and left-handed with left-handed wire.
  • the running yarn 17 experiences a wire reinforcement in the yarn section 17 ⁇ lying in front of the pneumatic fiber spreading device 19 and a counter-twist in the yarn section 17 ⁇ lying between the pneumatic false wire device 19 and the pair of draw-off rollers 20, 21.
  • the false wire dissolves after leaving the cyclone flow Z at the latest at the nip point given by the draw-off roller pair 20, 21 and the real wire, which the rotor 2 as yarn producer now issues to the yarn 17 with great spinning stability, remains.

Description

Verfahren und Vorrichtung zum Verbessern eines in dem Rotor einer Offenend-Spinnvorrichtung erzeugten Garns.Method and device for improving a yarn produced in the rotor of an open-end spinning device.

Die Erfindung betrifft ein Verfahren zum Verbessern eines in einem Rotor einer Offenend-Spinnvorrichtung mit echtem Draht erzeugten Garns, wobei das Garn nach einer der in Garnabzugsrichtung der Garnabzugsdüse folgenden Umlenkung an mindestens einer schräg zum Fadenlauf angeordneten Falschdrallkante eine weitere Umlenkung an einer weiteren, schräg zum Fadenlauf angeordneten Falschdrallkante erfährt, die das Garn in eine von der Richtung der vorausgehenden Umlenkung abweichende Richtung umlenkt, das dann durch ein Abzugswalzenpaar abgezogen wird, sowie eine Vorrichtung zur Durchführung des Verfahrens.The invention relates to a method for improving a yarn produced in a rotor of an open-end spinning device with real wire, the yarn following a deflection following the yarn withdrawal direction of the yarn take-off nozzle on at least one false twist edge arranged obliquely to the thread path, a further deflection at another, at an angle to False twist edge arranged in the thread path is experienced, which deflects the yarn in a direction deviating from the direction of the previous deflection, which is then drawn off by a pair of draw-off rollers, and a device for carrying out the method.

Die DE-A1 36 09 114 die jedoch keinen Stand der Technik bildet, zeigt eine Vorrichtung zum Offenend-Spinnen bekannt, bei der nach der Garnabzugsdüse in Garnabzugsrichtung eine Umlenkung angeordnet ist, die wenigstens eine Falschdrallkante aufweist. Nach der der Garnabzugsdüse folgenden Umlenkung ist eine weitere Umlenkung vorhanden, die das Garn in eine von der Richtung der vorausgehenden Umlenkung abweichende Richtung umlenkt. Mit der Falschdrallkante der ersten Umlenkung, die schräg im Abzugsweg des Fadens liegt und in etwa eine Neigung aufweist, die der Drehung des Fadens entspricht, wird erreicht, daß der durch die Abzugsdüse erzeugte Falschdraht nicht ohne weiteres diese Kante überwinden kann. Eine Kante, die senkrecht zum Fadenlauf angeordnet ist, kann vom Falschdraht ungehindert überwunden werden. Eine Falschdrallkante dagegen hat zur Folge, daß zwischen dieser Kante und der Abzugsrille des Rotors eine größere Drehung im Faden vorhanden ist. Dadurch wird die Spinnstabilität erhöht, das heißt die Gefahr eines Fadensbruchs in der Fadensammelrinne herabgesetzt.DE-A1 36 09 114, which does not form part of the prior art, shows a device for open-end spinning, in which a deflection is arranged after the yarn take-off nozzle in the yarn take-off direction and has at least one false twist edge. After the deflection following the yarn draw-off nozzle, there is a further deflection which deflects the yarn in a direction deviating from the direction of the preceding deflection. With the false twist edge of the first deflection, which lies obliquely in the withdrawal path of the thread and has approximately an inclination which corresponds to the rotation of the thread, it is achieved that the false wire generated by the withdrawal nozzle cannot easily overcome this edge. An edge that is perpendicular to the thread path is arranged, can be overcome by the false wire unhindered. A false twist edge, on the other hand, has the result that there is a greater twist in the thread between this edge and the withdrawal groove of the rotor. This increases the spinning stability, which means that the risk of thread breakage in the thread collecting channel is reduced.

Mit Hilfe der weiteren Umlenkung an einer weiteren Falschdrallkante, die das Garn in eine von der Richtung der vorhergehenden Umlenkung abweichende Richtung umlenkt, wird erreicht, daß die Wirkung der wenigstens einen Falschdrallkante erhöht wird. Mit ihr wird nämlich in verstärktem Maße verhindert, daß das Garn sich von der wenigstens einen Falschdrallkante abhebt und die Drehung diese Falschdrallkante "überspringt".With the help of the further deflection at a further false twist edge, which deflects the yarn in a direction deviating from the direction of the previous deflection, the effect of the at least one false twist edge is increased. With it it is namely prevented to a greater extent that the yarn stands out from the at least one false twist edge and the rotation "jumps over" this false twist edge.

Bei dem sonst guten Spinnergebnis zeichnen sich die aus diesem Garn hergestellten Artikel durch einen etwas harten Griff aus.With the otherwise good spinning result, the articles made from this yarn are characterized by a somewhat hard grip.

Aus der EP-A1 0 156 739 ist ein Verfahren zur Erhöhung der Abzugsgeschwindigkeit des Fadens aus einer Offenend-Rotorspinnvorrichtung bekannt. Der Faden wird aus dem Rotor über Abzugsdüse und Abzugsrohr abgezogen, wobei er zweimal in die gleiche Richtung umgelenkt wird. Diese Umlenkung erfolgt aber nicht über die sogenannten Falschdrallkanten. Der durch die Abzugsdüse erzeugte Falschdraht kann also die Umlenkungen ohne weiteres überwinden. Weiterhin kann auch der durch eine zusätzliche Falschdrahtvorrichtung aufgebrachte, den echten Draht verstärkende Falschdraht die Umlenkungen in dem Abzugsrohr ohne weiteres überwinden. Von einer Veränderung der Garnstruktur ist aus dieser Schrift nichts bekannt.From EP-A1 0 156 739 a method for increasing the withdrawal speed of the thread from an open-end rotor spinning device is known. The thread is drawn out of the rotor via the draw-off nozzle and draw-off tube, whereby it is deflected twice in the same direction. However, this deflection does not take place via the so-called false twist edges. The false wire generated by the extraction nozzle can therefore easily overcome the deflections. Furthermore, the false wire, which is applied by an additional false wire device and reinforces the real wire, can easily overcome the deflections in the exhaust pipe. Nothing is known from this document about a change in the yarn structure.

Aus der DE-A1 35 39 383 ist die Verwendung einer Zyklonströmung zur Erzeugung eines den echten Draht verstärkenden Falschdrahts bekannt.DE-A1 35 39 383 discloses the use of a cyclone flow to produce a false wire that reinforces the real wire.

Aus der GB-A-2 127 442 ist ein Verfahren gemäß dem Oberbegriff des Anspruchs 1 bekannt.From GB-A-2 127 442 a method according to the preamble of claim 1 is known.

Es wird ein Herumwickeln von Fasern um den Faden bewirkt, wodurch sogenannte Bauchbinden entstehend. Damit wird kein haariges Garn erzeugt.Fibers are wrapped around the thread, creating so-called abdominal bandages. This does not produce a hairy yarn.

Der Erfindung liegt die Aufgabe zugrunde, das Spinnergebnis einer Offenend-Spinnvorrichtung zu verbessern und der aus dem gesponnenen Garn hergestellten Ware, insbesondere Wirkware oder Strickware, einen weichen Griff zu verleihen.The invention has for its object to improve the spinning result of an open-end spinning device and to give the fabric made from the spun yarn, in particular knitwear or knitwear, a soft feel.

Gemäß der Erfindung wird diese Aufgabe durch ein Verfahren gemäß Anspruch 1 gelöst.According to the invention, this object is achieved by a method according to claim 1.

Vor dem Angriffspunkt der Zyklonströmung erhält das Garn einen stärkeren Draht, nach dem Angriffspunkt einen schwächeren Draht. Infolge der Zyklonströmung wird in dem zwischen der Zyklonströmung und dem durch das Abzugswalzenpaar gebildeten Klemmpunkt verlaufenden Garnstück ein Fadenballon erzeugt. Durch die Zentrifugalkräfte in dem schwächer gedrehten Garn wird ein Abspreizen äußerer Faserenden vom Faserverband erreicht. Infolge des Abspreizens der äußeren Faserenden zeichnet sich das so hergestellte Garn vorteilhaft durch eine höhere Haarigkeit aus und führt den Fertigartikel zu dem erwünschten weicheren Griff.Before the point of application of the cyclone flow, the yarn receives a stronger wire, after the point of application a weaker wire. As a result of the cyclone flow, a thread balloon is generated in the yarn piece running between the cyclone flow and the clamping point formed by the pair of draw-off rollers. Due to the centrifugal forces in the less twisted yarn, outer fiber ends are spread apart from the fiber structure. As a result of the outer fiber ends being spread apart, the yarn thus produced is advantageously distinguished by a higher hairiness and leads the finished article to the desired softer feel.

Bezüglich der Vorrichtung wird die Aufgabe der Erfindung dadurch gelöst, daß zwischen der letzten Falschdrallkante und dem Abzugswalzenpaar einer aus der DE-A1 36 09 114 bekannten Vorrichtung eine vom Garn durchlaufene Falschdrahtvorrichtung angeordnet ist, daß die Falschdrahtvorrichtung eine Vorrichtung zum Erzeugen einer um die Garnlängsachse drehenden Zyklonströmung besitzt und daß zwischen der Falschdrahtvorrichtung und dem durch das Abzugswalzenpaar gebildeten Klemmpunkt ein dem Garnstück ein die Ausbildung eines faserabspreizenden Fadenballons ermöglichender Abstand von dem Abzugswalzenpaar besteht.With regard to the device, the object of the invention is achieved in that between the last false twist edge and the pair of draw-off rollers of a device known from DE-A1 36 09 114, a false-wire device traversed by the yarn it is arranged that the false wire device has a device for generating a cyclone flow rotating about the longitudinal axis of the yarn and that between the false wire device and the clamping point formed by the pair of draw-off rollers there is a distance from the pair of draw-off rollers which enables the yarn piece to form a fiber-spreading thread balloon.

Die äußeren Fadenenden spreizen sich in dem Teil des Faserverbandes, in dem eine schwächere Drehung vorhanden ist, ab und dies ist die Ursache der größeren Haarigkeit, die im Fertigartikel zu einem weicheren Griff führt, was besonders bei Gewirken und Gestricken vorteilhaft ist. Die Garnabzugsgeschwindigkeit kann bei verhältnismäßig geringer Drehung groß sein, so daß die Erfindung auch die Produktivität der Offenend-Spinnvorrichtung steigert, wobei das Spinnergebnis insgesamt besser ist als beim Stand der Technik.The outer thread ends spread out in the part of the fiber structure in which there is a weaker twist, and this is the cause of the greater hairiness, which leads to a softer feel in the finished article, which is particularly advantageous in the case of knitted fabrics and knitted fabrics. The yarn take-off speed can be high with a relatively low twist, so that the invention also increases the productivity of the open-end spinning device, the overall spinning result being better than in the prior art.

Vorteilhaft weist die Vorrichtung zum Erzeugen der Zyklonströmung ein vom Garn durchlaufenes Rohr auf, in das mindestens ein Druckluft führender Tangentialkanal einmündet. Die Drehrichtung des Zyklons stimmt mit der Drehrichtung des echten Drahtes des Garns überein, so daß der zufuhrseitige Garnabschnitt einen den echten Draht verstärkenden Falschdraht aufweist.The device for generating the cyclone flow advantageously has a tube through which the yarn passes, into which at least one tangential duct carrying compressed air opens. The direction of rotation of the cyclone coincides with the direction of rotation of the real wire of the yarn, so that the feed-side yarn section has a false wire reinforcing the real wire.

Anhand des in der Zeichnung dargestellten Ausführungsbeispiels wird die Erfindung näher beschrieben und erläutert.Based on the embodiment shown in the drawing, the invention is described and explained in more detail.

Die Zeichnung zeigt einen Längsschnitt durch eine erfindungsgemäße Vorrichtung.The drawing shows a longitudinal section through a device according to the invention.

Die insgesamt mit 1 bezeichnete Offenend-Spinnvorrichtung besitzt einen Rotor 2, in dessen Fasersammelrille 3 auf hier nicht dargestellte Art und Weise Spinnfasern laufend eingebracht werden, während das Rotorinnere in Richtung des Pfeils 4 über den Rotorrand 5 und unter einem den Rotor 2 überdeckenden Deckel 6 hindurch fortlaufend entlüftet wird.The open-end spinning device, designated as a whole by 1, has a rotor 2, in the fiber collecting groove 3 of which spinning fibers are continuously introduced in a manner not shown here, while the rotor interior in the direction of arrow 4 over the rotor edge 5 and under a cover 6 covering the rotor 2 is continuously vented through.

In den Deckel 6 ist zentral eine Garnabzugsdüse 7 eingesetzt, an die unter Zwischenlage eines Garnleittrichters 8 ein zu einer Seite hin, hier nach oben, aus dem Fadenlauf abgebogenes Rohr 9 angeschlossen ist. Das Rohr 9 besitzt drei hintereinanderliegende, schräg zum Fadenlauf angeordnete, den freien Rohrquerschnitt, der im übrigen kreisrund ist, an der den geringsten Krümmungsradius aufweisenden Rohrmantellinie 10 einengende Falschdrallkanten 11, 12, 13. Die Falschdrallkanten 11, 12, 13 werden durch Stifte gebildet, die in schräg zum Fadenlauf liegende, den Rohrmantel durchdringende Bohrungen so eingesetzt sind, daß sie von der den geringsten Krümmungsradius aufweisenden Rohrmantellinie 10 in den freien Querschnitt des Rohrs 9 hineinragen, wie es die Zeichnung insbesondere am Beispiel der Falschdrallkante 11 zeigt.A yarn take-off nozzle 7 is inserted centrally in the cover 6, to which a pipe 9 bent from the thread course is connected to one side, here upwards, with the interposition of a yarn guide funnel 8. The tube 9 has three consecutive, oblique to the thread run, the free tube cross-section, which is circular in the rest, on the tube curvature line 10 having the smallest radius of curvature constricting false twist edges 11, 12, 13. The false twist edges 11, 12, 13 are formed by pins, the bores lying at an angle to the thread path and penetrating the tubular jacket are inserted in such a way that they protrude from the tube jacket line 10 having the smallest radius of curvature into the free cross section of the tube 9, as the drawing shows, in particular using the example of the false twist edge 11.

Bei dieser Konstruktion der Falschdrallkanten ist eine vollständige Kantenrundung gegeben. Bei anderen Ausführungsbeispielen können statt der Stifte mit kreisrundem Querschnitt stegartige Stifte, Dreikantstifte oder dergleichen verwendet werden, um nicht so ausgeprägte Rundungen der Falschdrallkanten zu erhalten.With this construction of the false twist edges, a complete edge rounding is given. In other exemplary embodiments, instead of the pins with a circular cross section, web-like pins, triangular pins or the like can be used in order not to obtain rounded curves of the false twist edges that are so pronounced.

Das Rohr 9 ist unter Beilage eines Dichtrings 15 in einen zylindrischen Stutzen 16 des Deckels 6 eingepreßt. Am Ende des Rohres 9 befindet sich eine weitere, ebenfalls schräg zum Fadenlauf angeordnete Falschdrallkante 14. Sie lenkt das im Rotor 2 erzeugte Garn 17, das zunächst die Garnabzugsdüse 7 durchläuft, dann aus seiner Laufrichtung durch die Falschdrallkanten 11, 12 und 13 nach oben ausgelenkt wird, jetzt wieder zur entgegengesetzten Seite aus seiner Richtung. Die Falschdrallkante 14 befindet sich am garneingangsseitigen schrägen Ende eines weiteren Rohres 18, das unter einem Winkel zur Rohrachse des Rohres 9 in das Rohr 9 hineinragt.The tube 9 is pressed into a cylindrical socket 16 of the cover 6 with the addition of a sealing ring 15. At the end of the tube 9 there is another false twist edge 14 which is also arranged obliquely to the thread run. It directs the yarn 17 produced in the rotor 2, which first passes through the yarn take-off nozzle 7, is then deflected upward from its running direction by the false twist edges 11, 12 and 13, now again to the opposite side from its direction. The false twist edge 14 is located at the sloping end of another tube 18 on the yarn input side, which extends into the tube 9 at an angle to the tube axis of the tube 9.

An das Rohr 18 schließt sich eine pneumatische Falschdrahtvorrichtung 19 an. Das Garn 17 durchläuft die Falschdrahtvorrichtung 19 und danach ein Abzugswalzenpaar 20, 21. Die Abzugswalze 20 ist mittels einer Welle 22 in Richtung des Pfeils 23 antreibbar, während die Abzugswalze 21 mit einer Andruckkraft als eine durch Friktion mitlaufende Anlegewalze gegen die Abzugswalze 20 beziehungsweise das Garn 17 anlegbar ist.A pneumatic false wire device 19 connects to the tube 18. The yarn 17 passes through the false wire device 19 and then through a pair of draw-off rollers 20, 21. The draw-off roller 20 can be driven by means of a shaft 22 in the direction of the arrow 23, while the draw-off roller 21 with a pressing force as a contact roller running against friction against the draw-off roller 20 or the yarn 17 can be created.

Nach Durchlaufen des Abzugswalzenpaars 20, 21 wird das Garn 17 auf hier nicht dargestellte Art und Weise zu einer Spule aufgewickelt.After passing through the pair of draw rollers 20, 21, the yarn 17 is wound into a bobbin in a manner not shown here.

Die pneumatische Falschdrahtvorrichtung 19 besteht aus einem Hüllrohr 24, in das ein Ringkanal 25 eingearbeitet ist. Das Hüllrohr 24 ist auf das Rohr 18 aufgepreßt. Es besitzt einen als Vorrichtung zum Erzeugen einer Zyklonströmung Z dienenden rohrartigen Dralleinsatz 26, der in Höhe des Ringkanals 25 vier leicht gegen die Garnlaufrichtung geneigt verlaufende Tangentialkanäle 27 besitzt. Durch eine Verschraubung 28 wird der Dralleinsatz 26 im Hüllrohr 24 festgehalten. Die Verschraubung 28 trägt ein Garnaustrittsrohr 29, das zur Garnauslaßseite hin trichterartig aufgeweitet ist.The pneumatic false wire device 19 consists of a cladding tube 24 into which an annular channel 25 is incorporated. The cladding tube 24 is pressed onto the tube 18. It has a tubular swirl insert 26 which serves as a device for generating a cyclone flow Z and which has four tangential channels 27 which extend slightly at an angle to the yarn running direction at the level of the ring channel 25. The swirl insert 26 is held in the cladding tube 24 by a screw connection 28. The screw connection 28 carries a yarn outlet tube 29 which is widened like a funnel toward the yarn outlet side.

In Höhe des Ringkanals 25 besitzt das Hüllrohr 24 eine Gewindebohrung, in die ein Schlauchanschlußstutzen 30 eingeschraubt ist. In dem Schlauchanschlußstutzen endet ein Preßluftschlauch 31, der über ein hier nicht dargestelltes schaltbares Ventil zu einer Druckluftquelle führt. Die Garnabzugsrichtung ist durch einen Pfeil 32 bezeichnet.At the level of the ring channel 25, the cladding tube 24 has a threaded bore into which a hose connection piece 30 is screwed. A compressed air hose 31 terminates in the hose connecting piece and leads to a compressed air source via a switchable valve (not shown here). The yarn take-off direction is indicated by an arrow 32.

Die Falschdrallkanten 11 bis 14 sind so ausgerichtet, daß ihre Richtung mit der an der jeweiligen Kante vorhandenen Richtung des Garndrahtes übereinstimmt.The false twist edges 11 to 14 are aligned so that their direction coincides with the direction of the yarn wire present on the respective edge.

Auch die Ausrichtung der Tangentialkanäle 27 nimmt Rücksicht auf den Garndraht, so daß die Zyklonströmung Z rechtsdrehend auf das Garn 17 einwirkt bei Rechtsdraht und linksdrehend bei Linksdraht. Dabei erfährt das laufende Garn 17 eine Drahtverstärkung in dem vor der pneumatische Faserspreizvorrichtung 19 liegenden Garnabschnitt 17ʹ und einen Gegendrall in dem zwischen der pneumatischen Falschdrahtvorrichtung 19 und dem Abzugswalzenpaar 20, 21 liegenden Garnabschnitt 17ʺ. Bei laufendem Garn löst sich nach Verlassen der Zyklonströmung Z spätestens an dem durch das Abzugswalzenpaar 20, 21 gegebenen Klemmpunkt der Falschdraht auf und es bleibt der echte Draht, den der Rotor 2 als Garnerzeuger nunmehr dem Garn 17 mit großer Spinnstabilität erteilt, übrig.The orientation of the tangential channels 27 also takes into account the yarn wire, so that the cyclone flow Z acts clockwise on the yarn 17 with right-hand wire and left-handed with left-handed wire. The running yarn 17 experiences a wire reinforcement in the yarn section 17ʹ lying in front of the pneumatic fiber spreading device 19 and a counter-twist in the yarn section 17ʺ lying between the pneumatic false wire device 19 and the pair of draw-off rollers 20, 21. When the yarn is running, the false wire dissolves after leaving the cyclone flow Z at the latest at the nip point given by the draw-off roller pair 20, 21 and the real wire, which the rotor 2 as yarn producer now issues to the yarn 17 with great spinning stability, remains.

Claims (3)

  1. A method of improving a yarn (17) produced with a genuine twist in a rotor (20) of an open-end spinning apparatus (1), the yarn (17) undergoing at least at a false twist edge (11, 12, 13) disposed obliquely to the thread run, a change in direction which, in the direction of yarn pull-off, is downstream of the yarn pull-off nozzle (7), characterised in that the yarn undergoes a further change in direction at a further false twist edge (14) disposed obliquely to the thread run and which deflects the yarn into a direction diverging from the direction of the previous change in direction, the yarn then being pulled off through a pair (20) of pull-off rollers and in that after the moving yarn (17) has been deflected at the final false twist edge (14) but prior to its passing through the pair of pull-off rollers (20) has imposed upon it by means of a cyclone flow (Z) created by a false twist apparatus (19), a rotary movement directed in the direction of the genuine twist and in that between the false twist apparatus (19) and the pair of pull-off rollers (20) there is a balloon of yarn which spreads the outer fibre ends of the thread radially apart.
  2. An apparatus for improving a yarn (17) produced with a genuine twist in the rotor (20) of an open-end spinning apparatus (1) and which comprises a yarn pull-off nozzle (7) and adjacent thereto and disposed obliquely to the thread run, at least one false twist edge (11, 12, 13) for deflecting the yarn (17) into a direction, characterised in that subsequently there is provided a further false twist edge (14) disposed obliquely to the thread run for deflecting the yarn (17) into a direction diverging from the previous deflection, and in that between the final false twist edge (14) and the pair of pull-off rollers (20, 21) there is a false twist apparatus (19) through which the yarn (17) passes, and in that the false twist apparatus (19) has a device (26) for generating a cyclone flow (Z) which rotates about the longitudinal axis of the yarn and in that between the false twist apparatus (19) and the clamping point constituted by the pair of pull-off rollers (20, 21) there is a gap which allows the portion of yarn (17'') to form a balloon of thread which spreads the fibres apart.
  3. An apparatus according to Claim 2, characterised in that the device (26) for generating the cyclone flow (Z) has a tube through which the yarn (17) passes and into which at least one compressed air conveying tangential duct (27) discharges and in that the direction of rotation of the cyclone flow (Z) is in accordance with the direction of rotation of the genuine twist of the yarn (17) so that the feed-side portion (17') of yarn has a false twist which intensifies the genuine twist.
EP88102323A 1987-02-20 1988-02-18 Method and apparatus for improving a yarn produced in the rotor of an open-end spinning machine Expired - Lifetime EP0279434B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3705479 1987-02-20
DE19873705479 DE3705479A1 (en) 1987-02-20 1987-02-20 METHOD AND DEVICE FOR IMPROVING A YARN PRODUCED IN THE ROTOR OF AN OPEN-END SPIDER

Publications (2)

Publication Number Publication Date
EP0279434A1 EP0279434A1 (en) 1988-08-24
EP0279434B1 true EP0279434B1 (en) 1991-09-11

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Application Number Title Priority Date Filing Date
EP88102323A Expired - Lifetime EP0279434B1 (en) 1987-02-20 1988-02-18 Method and apparatus for improving a yarn produced in the rotor of an open-end spinning machine

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US (1) US4829762A (en)
EP (1) EP0279434B1 (en)
JP (1) JP2604781B2 (en)
DE (2) DE3705479A1 (en)
IT (1) IT1215916B (en)

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Publication number Priority date Publication date Assignee Title
DE3811739A1 (en) * 1988-04-08 1989-10-19 Schlafhorst & Co W METHOD AND DEVICE FOR IMPROVING A YARN PRODUCED IN THE ROTOR OF AN OPEN-END SPIDER
US5323599A (en) * 1988-04-08 1994-06-28 W. Schlafhorst & Co. Process and apparatus for producing hairiness in an open-end spinning yarn
DE3824283C1 (en) * 1988-07-16 1989-10-26 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt, De
US5437147A (en) * 1992-08-20 1995-08-01 Burckhardt America, Inc. Open end spinning device
DE4235024C2 (en) * 1992-10-16 1996-07-25 Rieter Ingolstadt Spinnerei Thread take-off tube
DE4334485A1 (en) * 1993-10-09 1995-04-13 Schlafhorst & Co W Open-end spinning device
DE4418723C1 (en) * 1994-05-28 1995-08-31 Rieter Ingolstadt Spinnerei Open end rotor spinner avoiding frequent rotor and cover renewal
DE19718768A1 (en) * 1997-05-05 1998-11-12 Rieter Ingolstadt Spinnerei Open end spinner cleaning
DE19915924B4 (en) * 1999-04-09 2009-12-10 Rieter Ingolstadt Gmbh Thread guide tube
US7870891B2 (en) * 2004-05-29 2011-01-18 Kilr-Chilr, Llc Systems, devices and methods for regulating temperatures of tanks, containers and contents therein
CN103343408B (en) * 2013-07-05 2016-01-20 宜宾纬络纺织有限公司 Rotor spinning twisting process
DE102014107181A1 (en) * 2014-05-21 2015-11-26 Maschinenfabrik Rieter Ag False twist device for an open-end spinning device

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DE2130722B2 (en) * 1971-06-21 1976-04-15 Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt DEVICE FOR OPEN-END SPINNING OF TEXTILE FIBERS
GB1569123A (en) * 1976-01-26 1980-06-11 Mackie & Sons Ltd J Open-end spinning machines
CS223961B2 (en) * 1978-03-28 1983-11-25 Alsacienne Constr Meca Facility for knitting the released fibres
JPS58120825A (en) * 1981-12-29 1983-07-18 Toyoda Autom Loom Works Ltd Yarn taking out apparatus in open end spinning machine
DE3207136C2 (en) * 1982-02-27 1994-03-17 Schlafhorst & Co W Method and device for producing a thread by open-end spinning
DE3220402C2 (en) * 1982-05-29 1985-03-21 W. Schlafhorst & Co, 4050 Mönchengladbach Method and device for producing a yarn spun with an OE rotor spinning machine
FR2532665A1 (en) * 1982-09-08 1984-03-09 Alsacienne Constr Mat Tex IMPROVEMENT TO FIBER RELEASED FILATURE DEVICES
GB2147618B (en) * 1983-08-19 1987-04-15 Howa Machinery Ltd Process and apparatus for preparing fasciated spun yarns
FR2560228A1 (en) * 1984-02-24 1985-08-30 Asa Sa DEVICE FOR OBTAINING A FIBER FILE
JPS60199924A (en) * 1984-03-21 1985-10-09 Asahi Chem Ind Co Ltd Production of wool-like bulky spun yarn
FR2566810B1 (en) * 1984-06-28 1986-09-12 Inst Textile De France IMPROVED FREE FIBER TYPE SPINNING PROCESS AND DEVICE
JPS61113831A (en) * 1984-11-06 1986-05-31 Murata Mach Ltd Production of spun yarn and device therefor
EP0220546A1 (en) * 1985-10-15 1987-05-06 Maschinenfabrik Rieter Ag Spinning device for open-end spinning
DE3609114C2 (en) * 1986-03-19 1995-11-30 Schlafhorst & Co W Device for OE spinning with a spinning rotor

Also Published As

Publication number Publication date
DE3864694D1 (en) 1991-10-17
IT1215916B (en) 1990-02-22
US4829762A (en) 1989-05-16
JP2604781B2 (en) 1997-04-30
EP0279434A1 (en) 1988-08-24
JPS63295723A (en) 1988-12-02
IT8819461A0 (en) 1988-02-18
DE3705479A1 (en) 1988-09-01

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