EP1910593B1 - Method for operating an open-end spinning device - Google Patents

Method for operating an open-end spinning device Download PDF

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Publication number
EP1910593B1
EP1910593B1 EP06753702A EP06753702A EP1910593B1 EP 1910593 B1 EP1910593 B1 EP 1910593B1 EP 06753702 A EP06753702 A EP 06753702A EP 06753702 A EP06753702 A EP 06753702A EP 1910593 B1 EP1910593 B1 EP 1910593B1
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EP
European Patent Office
Prior art keywords
piecing
opening roller
spinning
speed
thread
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EP06753702A
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German (de)
French (fr)
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EP1910593A1 (en
Inventor
Manfred Lassmann
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Oerlikon Textile GmbH and Co KG
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Oerlikon Textile GmbH and Co KG
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    • 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
    • D01H4/48—Piecing arrangements; Control therefor
    • D01H4/50—Piecing arrangements; Control therefor for rotor spinning
    • 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
    • D01H4/42—Control of driving or stopping
    • D01H4/44—Control of driving or stopping in rotor spinning

Definitions

  • the present invention relates to a method for operating an open-end spinning device according to the preamble of claim 1.
  • the piecing is usually carried out at the individual spinning stations of the open-end rotor spinning machines by a spinning along the spinning machine piecing, the so-called piecing.
  • the opening roller is driven at a piecing speed which is above the operating speed of the opening roller.
  • Faserbartegalmaschine which serves to create the same conditions during piecing, so much sliver is retracted for an always equal period of time added to this process to provide a substantially equal amount of fiber at the beginning of the piecing process.
  • the opposite of the operating speed of the opening roller higher Anspinnnaviere causes a higher fiber throughput, whereby after the structure of the fiber ring during the piecing process in the spinning rotor such a quantity of fiber ready for piecing that after processing of the fiber ring no delay-induced fiber deficiency arises, which causes a thin spot.
  • the higher piecing speed of the opening roller moreover achieves a more effective combing out of the fibers, which additionally leads to an improvement in the piecing behavior.
  • the Anspinnnaviere the opening roller should be achieved before the beginning of piecing.
  • the reproducibility of the fiber feed required for the quality of the piecing is achieved. Since the combing out of the fibers always takes place at the same piecing speed of the opening roller, the spinning rotor is always supplied with the same amount of fiber during piecing.
  • the piecing speed of the opening roller can be maintained during the complete processing of the draw-in addition.
  • the increased fiber throughput is kept constant even beyond the completion of the actual piecing process in order to avoid, as desired, a thin spot following the piecer.
  • the piecing speed becomes the opening roller reduced to the normal spinning operation adapted operating speed. This serves to ensure the yarn uniformity of the yarn to be spun.
  • the open-end spinning device can be operated both for the piecing process and for the spinning operation with an opening roller speed optimally adapted to these processes.
  • the speed control of the opening roller during the piecing process and the process of Einzugsaufadd ist of other, these operations affecting parameters independently by a control device is achieved by the use of single-motor drives, for example for the spinning rotor and the opening roller, which are each connected via signal lines to the control device and are independently controlled by them.
  • FIG. 1 shows an open-end spinning device 1 of an open-end rotor spinning machine, which are arranged in the region of the spinning stations of such textile machines.
  • Such open-end spinning devices 1 are known in principle and, for example, in the DE 196 50 597 A1 described in relative detail.
  • the open-end spinning apparatus 1 comprises a spinning rotor 2 with rotor cup 4, which rotates during the spinning operation "at high speed in a spinning rotor housing 5 which can be acted upon by a negative pressure.
  • the spinning rotor 2 is defined by a controllable electric motor single drive 3, which is connected via electrical lines 20 to the power supply 23 of the textile machine concerned, driven.
  • the electromotive single drive 3 is connected for this purpose via at least one signal line 22 to a control device 21.
  • the cover element 8 which closes the rotor housing 5 during the spinning operation, is mounted so as to be limitedly rotatable about a pivot axis 16, so that the stationary spinning rotor 4 is accessible when required.
  • a so-called channel plate adapter 9 is inserted, to which a thread withdrawal tube 10 is connected.
  • the cover element 8 has an opening roller housing 11, in which an opening roller 12 rotated, which is fixed with its bearing shaft 17 in a rear bearing bracket 14 of the opening roller housing 11.
  • the opening roller 12 is driven by an electromotive single drive 24, which is designed as an external rotor, and has a contact track device 18 for easily releasable coupling to the power supply 23 of the open-end rotor spinning machine in the end region of its bearing shaft 17.
  • the electromotive single drive 24 is also connected via a signal line to the control device 21 and controlled via this.
  • In Auflensewalzengeophen 11 also a sliver feed cylinder 13 is rotatably mounted, which can be acted upon by a motor 15, preferably a stepper motor, by an electric motor. Also, the drive 15 is connected via an electric line 26 to the power supply 23 of the textile machine and a signal line 25 to the controller 21.
  • the spinning device 1 After the occurrence of an interruption of the spinning process by detecting the absence of a thread by means of a fader monitoring device, not shown, the spinning device 1 is initially set still. Subsequently, a piecing process for thread connection is initiated.
  • the piecing process begins with fiber bargaining to provide the same conditions for the piecing process, regardless of how long the shutdown of the spinning device 1 lasts.
  • the Faserbartegalmaschine first the spinning rotor 2, which has a speed of about 120,000 min -1 or more in the spinning operation, so high that the spinning rotor 2 has a required for the successful implementation of the piecing operation minimum speed, in particular the execution and operating speed of the respective spinning rotor 2 is dependent.
  • the control of the single-motor drive 3 of the spinning rotor 2 takes place for this purpose by the control device 21st
  • the controller 23 controls the controller 23 such that it has an independent of the minimum speed of the spinning rotor 2 Anspinnnaviere, which is above the operating speed.
  • the piecing speed is preferably between 10% and 40% above the operating speed of the opening roller 11 in the spinning operation.
  • the piecing speed is reached before the start of the piecing process.
  • the sliver is combed out more intensively by the opening roller 12 rotating at the higher piecing speed and the conveying speed is increased, as is the case in normal spinning operation at operating speed of the opening roller 12.
  • the structure of the fiber ring in the spinning rotor 2 is accordingly faster.
  • the fiber feed is interrupted.
  • the prepared for piecing yarn end is introduced through the exhaust pipe 10 in the rotating spinning rotor 2, where it strikes the fiber ring previously constructed in the spinning rotor 2.
  • the thread end breaks up the fiber ring and connects to the fibers that deposit at the thread end, creating the piecing.
  • the subsequent addition of the thread to the fiber ring process of the intake charge addition serves to delay the occurring fiber supply between the Pre-feed for piecing and re-starting the fiber supply to compensate.
  • a delay of the fiber supply causes the yarn during the start-up of the spinning rotor 2 has irregularities in the form of a thin spot, which occur immediately after the piecer and affect the quality of the thread lasting. Over the period for performing the piecing and the draw-in addition, the rotational speed of the spinning rotor 2 increases smoothly until the operating speed is reached.
  • FIG. 2 a diagram of a thread profile in the Anspinn Scheme is shown, which results in a piecing speed of the opening roller 12 of about 5,500 min -1 .
  • a piecing speed of the opening roller 12 of about 5,500 min -1 .
  • FIG. 3 shows Fig. 3 a thread profile in the Anspinn Scheme, which results in a piecing speed of the opening roller 12 of about 10,000 min -1 .
  • a thread profile is formed, which almost corresponds to the thread profile, which is achieved during the spinning process. This is due to the increase in the amount of fiber provided, which is achieved by the increased piecing speed of the opening roller 12.
  • the piecing speed of the opening roller 12 is only after the completion of the intake charge addition to the for the spinning operation required optimum operating speed of the opening roller 12 is reduced.

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

Abstract

The invention relates to a method for operating an open-end spinning device (1), comprising a spinning rotor (2) and an opening roller (12), which can be controlled so as to be driven individually independently of one another, wherein after an interruption in the spinning process takes place as a result of the detection of the absence of a thread, a piecing operation is initiated, comprising a piecing process, in which an upper thread passes through a fiber ring formed in the spinning rotor (2) and is connected to the latter, and a subsequent drawing-in accumulating process which serves to reduce a thin point in the thread following the piecer, wherein during the piecing operation, the opening roller (12) is temporarily driven at a piecing speed which is higher than the operating speed of the opening roller (12).

Description

Die vorliegende Erfindung betrifft ein Verfahren zum Betreiben einer Offenend-Spinnvorrichtung gemäß dem Oberbegriff des Anspruches 1.The present invention relates to a method for operating an open-end spinning device according to the preamble of claim 1.

Mit steigenden Anforderungen an den Garnherstellungsprozess werden auch an die Erzeugung von Anspinnern immer höhere Ansprüche gestellt. Der Vorgang der Bildung von Anspinnern nach Fadenunterbrechungen, das Anspinnen, wird an den einzelnen Spinnstellen der Offenend-Rotorspinnmaschinen üblicherweise von einer entlang der Spinnmaschine wandernden Anspinneinrichtung, dem so genannten Anspinnwagen, vorgenommen.With increasing demands on the yarn production process, the production of piecings is becoming increasingly demanding. The process of formation of Anspinnern after thread interruptions, the piecing is usually carried out at the individual spinning stations of the open-end rotor spinning machines by a spinning along the spinning machine piecing, the so-called piecing.

Zum Beispiel nach einem Fadenbruch, der das Anspinnen auslöst, dauert es in Abhängigkeit von der Position des Anspinnwagens an der Offenend-Rotorspinnmaschine unterschiedlich lange, bis an der betroffenen Spinnstelle wieder angesponnen wird. Beim Fadenbruch wird der Fasereinzug abgeschaltet, die weiterlaufende Auflösewalze löst jedoch zu diesem Zeitpunkt noch Fasern aus dem Faserbart heraus. Um gleiche Bedingungen beim Anspinnen und damit eine möglichst gleiche Voreinspeisemenge an Fasern zu erreichen, wird vor jedem Anspinnen der Faserbart egalisiert.For example, after a yarn breakage, which triggers the piecing, it takes depending on the position of the piecing carriage on the open-end rotor spinning machine for different lengths, is spun up again at the affected spinning position. When thread breakage of the fiber feed is turned off, the ongoing opening cylinder dissolves at this time nor fibers out of the tuft. In order to achieve the same conditions during piecing and thus the same as possible pre-feed quantity of fibers, the tuft is equalized before each piecing.

Der eigentliche Vorgang des Anspinnens beginnt mit dem Start des Spinnrotors. In der Zeit nach der Faserbartegalisierung des vorgelegten Faserbandes bis zum Einschalten des Einzuges zur betriebsmäßigen Fasereinspeisung werden aus dem Faserbart des Faserbandes wiederum Fasern herausgekämmt und über den Rotorrand des stehenden Spinnrotors abgesaugt.The actual process of piecing begins with the start of the spinning rotor. In the period after Faserbartegalisierung the submitted sliver to turn on the feeder for operational fiber feed fibers are combed out again from the fiber tuft of the sliver and sucked over the rotor edge of the stationary spinning rotor.

Neben dem Nachlauf des Faserflusses nach Abschalten des Einzuges und dem verzögerten Anlauf nach Einschalten des Einzuges kann der Faserfluss auch bei Erhöhung der Einzugsgeschwindigkeit mit einer Verzögerung reagieren. Das kann dazu führen, dass der Faden während des Hochlaufs des Spinnrotors zu dünn wird. Besonders ausgeprägt tritt dies bei niedrigen Einzugsgeschwindigkeiten auf. Um diese unerwünschte Dickenabweichung zu vermeiden, kann eine Einzugsaufaddierung vorgenommen werden. Derartige Einzugsaufaddierungen während des Anspinnens sind ausführlich beispielsweise in der DE 40 30 100 A1 oder der Veröffentlichung von Raasch et. al. "Automatisches Anspinnen beim OE-Rotorspinnen", Melliand Textilberichte 4/1989, Seiten 251-256 , beschrieben.In addition to the wake of the fiber flow after switching off the feeder and the delayed start after switching on the feeder can the fiber flow will react with a delay even when the feed speed is increased. This can cause the thread to become too thin during the run-up of the spinning rotor. This is particularly pronounced at low feed speeds. In order to avoid this undesirable thickness deviation, a feed-in addition may be made. Such Einzugsaufaddierungen during piecing are described in detail, for example in the DE 40 30 100 A1 or the publication of Raasch et. al. "Automatic piecing in OE rotor spinning", Melliand Textile Reports 4/1989, pages 251-256 , described.

Durch die DE 103 38 842 A1 ist eine einzelmotorisch angetriebene Auflösewalze für eine Offenend-Spinnvorrichtung bekannt. Die aus dieser Schrift bekannte Auflösewalze wird an der Offenend-Spinnvorrichtung auf in dem zuvor genannten Stand der Technik bereits beschriebene Weise eingesetzt.By the DE 103 38 842 A1 is a single motor driven opening roller for an open-end spinning device known. The opening roller known from this document is used on the open-end spinning device in a manner already described in the aforementioned prior art.

Als nachteilig erweist sich, dass auch hier die eingangs beschriebene Verzögerung bei der Bereitstellung der erforderlichen Fasermenge zum Anspinnen auftritt, die für die Einzugsaufaddierung erforderlich ist. Für die Qualität der Anspinner ist es jedoch wichtig, dass die Faserzuführung reproduzierbar und ohne Verzögerung erfolgt. Somit ist es die Aufgabe der vorliegenden Erfindung, ein Verfahren bereitzustellen, mittels dessen die Garngleichmäßigkeit beim Anspinnvorgang verbessert wird.It proves to be disadvantageous that here too the delay described in the introduction of the required amount of fiber for piecing, which is required for the draw-in addition, also occurs here. However, for the quality of the piecing it is important that the fiber feed is reproducible and without delay. Thus, it is the object of the present invention to provide a method by means of which the yarn uniformity during the piecing process is improved.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruches 1 gelöst.This object is achieved by the characterizing features of claim 1.

Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous embodiments of the invention are the subject of the dependent claims.

Gemäß dem Anspruch 1 ist vorgesehen, dass während des Anspinnvorganges die Auflösewalze mit einer Anspinndrehzahl angetrieben wird, die oberhalb der Betriebsdrehzahl der Auflösewalze liegt. Nach dem Vorgang der Faserbartegalisierung, die der Schaffung gleicher Bedingungen beim Anspinnen dient, wird um eine immer gleiche Zeitspanne versetzt zu diesem Vorgang so viel Faserband eingezogen, um zu Beginn des Anspinnvorganges eine im Wesentlichen gleiche Fasermenge bereitzustellen. Die gegenüber der Betriebsdrehzahl der Auflösewalze höhere Anspinndrehzahl bewirkt einen höheren Faserdurchsatz, wodurch nach dem Aufbau des Faserringes während des Anspinnprozesses im Spinnrotor eine solche Fasermenge zum Anspinnen bereitsteht, dass nach dem Abarbeiten des Faserringes kein verzögerungsbedingter Fasermangel entsteht, der eine Dünnstelle hervorruft. Durch die höhere Anspinndrehzahl der Auflösewalze wird darüber hinaus eine effektivere Auskämmung der Fasern erreicht, was zusätzlich zu einer Verbesserung des Anspinnverhaltens führt.According to claim 1 it is provided that during the piecing process, the opening roller is driven at a piecing speed which is above the operating speed of the opening roller. After the process of Faserbartegalisierung, which serves to create the same conditions during piecing, so much sliver is retracted for an always equal period of time added to this process to provide a substantially equal amount of fiber at the beginning of the piecing process. The opposite of the operating speed of the opening roller higher Anspinndrehzahl causes a higher fiber throughput, whereby after the structure of the fiber ring during the piecing process in the spinning rotor such a quantity of fiber ready for piecing that after processing of the fiber ring no delay-induced fiber deficiency arises, which causes a thin spot. The higher piecing speed of the opening roller moreover achieves a more effective combing out of the fibers, which additionally leads to an improvement in the piecing behavior.

Vorzugsweise sollte die Anspinndrehzahl der Auflösewalze vor Beginn des Anspinnvorganges erreicht werden. Dadurch wird die für die Qualität der Anspinner erforderliche Reproduzierbarkeit der Faserzuführung erreicht. Da das Auskämmen der Fasern stets mit der gleichen Anspinndrehzahl der Auflösewalze erfolgt, wird dem Spinnrotor während des Anspinnens stets die gleiche Fasermenge zugeführt.Preferably, the Anspinndrehzahl the opening roller should be achieved before the beginning of piecing. As a result, the reproducibility of the fiber feed required for the quality of the piecing is achieved. Since the combing out of the fibers always takes place at the same piecing speed of the opening roller, the spinning rotor is always supplied with the same amount of fiber during piecing.

Insbesondere kann die Anspinndrehzahl der Auflösewalze während der vollständigen Abarbeitung der Einzugsaufaddierung aufrechterhalten werden. Auf diese Weise wird der erhöhte Faserdurchsatz auch über den Abschluss des eigentlichen Ansetzvorganges hinaus konstant gehalten, um wie erwünscht eine sich an den Anspinner anschließende Dünnstelle zu vermeiden. Im Anschluss an die Einzugsaufaddierung wird die Anspinndrehzahl der Auflösewalze auf die an den normalen Spinnbetrieb angepasste Betriebsdrehzahl reduziert. Dies dient dazu, die Garngleichmäßigkeit des zu spinnenden Fadens sicherzustellen. Somit lässt sich die Offenend-Spinnvorrichtung erfindungsgemäß sowohl für den Anspinnvorgang als auch für den Spinnbetrieb mit einer optimal an diese Vorgänge angepassten Auflösewalzendrehzahl betreiben.In particular, the piecing speed of the opening roller can be maintained during the complete processing of the draw-in addition. In this way, the increased fiber throughput is kept constant even beyond the completion of the actual piecing process in order to avoid, as desired, a thin spot following the piecer. Following the draw-in addition, the piecing speed becomes the opening roller reduced to the normal spinning operation adapted operating speed. This serves to ensure the yarn uniformity of the yarn to be spun. Thus, according to the invention, the open-end spinning device can be operated both for the piecing process and for the spinning operation with an opening roller speed optimally adapted to these processes.

Vorteilhafterweise kann die Drehzahlsteuerung der Auflösewalze während des Anspinnvorganges und des Vorganges der Einzugsaufaddierung von anderen, diese Vorgänge beeinflussenden Parametern unabhängig durch eine Steuereinrichtung erfolgen. Dies wird durch den Einsatz einzelmotorischer Antriebe beispielsweise für den Spinnrotor und die Auflösewalze erreicht, die jeweils über Signalleitungen mit der Steuereinrichtung verbunden sind und unabhängig voneinander durch diese gesteuert werden.Advantageously, the speed control of the opening roller during the piecing process and the process of Einzugsaufaddierung of other, these operations affecting parameters independently by a control device. This is achieved by the use of single-motor drives, for example for the spinning rotor and the opening roller, which are each connected via signal lines to the control device and are independently controlled by them.

Die Erfindung wird nachfolgend anhand eines in den Zeichnungen dargestellten Ausführungsbeispieles näher erläutert.The invention will be explained in more detail with reference to an embodiment shown in the drawings.

Es zeigt:

Fig. 1
eine Offenend-Rotorspinnvorrichtung mit einzelmotorischen Antrieben zumindest für Spinnrotor, Auflösewalze sowie einer Steuereinrichtung für diese Antriebe;
Fig. 2
das Profil eines Anspinners bei einer Anspinndrehzahl der Auflösewalze von 5.500 Umdrehungen pro Minute;
Fig. 3
das Profil eines Anspinners bei einer Anspinndrehzahl der Auflösewalze von 10.0.00 Umdrehungen pro Minute.
It shows:
Fig. 1
an open-end rotor spinning device with single motor drives at least for spinning rotor, opening roller and a control device for these drives;
Fig. 2
the profile of a piecing at a piecing speed of the opening roller of 5,500 revolutions per minute;
Fig. 3
the profile of a piecing at a piecing speed of the opening roller of 10.0.00 revolutions per minute.

Die Darstellung in Fig. 1 zeigt eine Offenend-Spinnvorrichtung 1 einer Offenend-Rotorspinnmaschine, die im Bereich der Spinnstellen derartiger Textilmaschinen angeordnet sind. Solche Offenend-Spinnvorrichtungen 1 sind im Prinzip bekannt und beispielsweise in der DE 196 50 597 A1 relativ ausführlich beschrieben.The representation in Fig. 1 shows an open-end spinning device 1 of an open-end rotor spinning machine, which are arranged in the region of the spinning stations of such textile machines. Such open-end spinning devices 1 are known in principle and, for example, in the DE 196 50 597 A1 described in relative detail.

Die Offenend-Spinnvorrichtung 1 umfasst einen Spinnrotor 2 mit Rotortasse 4, der während des Spinnbetriebes"mit hoher Drehzahl in einem mit einem Unterdruck beaufschlagbaren Spinnrotorgehäuse 5 umläuft. Das Rotorgehäuse 5, welches während des Spinnbetriebes nach vorne durch ein Deckelelement 8 verschlossen ist, ist zu diesem Zweck über eine Pneumatikleitung 6 an einer Unterdruckquelle 7 angeschlossen, die den zum Spinnen notwendigen Unterdruck im Rotorgehäuse 5 bereitstellt.The open-end spinning apparatus 1 comprises a spinning rotor 2 with rotor cup 4, which rotates during the spinning operation "at high speed in a spinning rotor housing 5 which can be acted upon by a negative pressure. The rotor housing 5, which is closed forwards by a lid element 8 during the spinning operation, is closed connected to this purpose via a pneumatic line 6 to a vacuum source 7, which provides the necessary vacuum for spinning in the rotor housing 5.

Der Spinnrotor 2 ist durch einen regelbaren elektromotorischen Einzelantrieb 3, der über Elektroleitungen 20 an die Energieversorgung 23 der betreffenden Textilmaschine angeschlossen ist, definiert antreibbar. Der elektromotorische Einzelantrieb 3 ist zu diesem Zweck über wenigstens eine Signalleitung 22 mit einer Steuereinrichtung 21 verbunden.The spinning rotor 2 is defined by a controllable electric motor single drive 3, which is connected via electrical lines 20 to the power supply 23 of the textile machine concerned, driven. The electromotive single drive 3 is connected for this purpose via at least one signal line 22 to a control device 21.

Das Deckelelement 8, das das Rotorgehäuse 5 während des Spinnbetriebes verschließt, ist um eine Schwenkachse 16 begrenzt drehbar gelagert, so dass der stillstehende Spinnrotor 4 bei Bedarf zugängig ist. In Höhe des Spinnrotors 2 ist in das Deckelelement 8 außerdem, auswechselbar, ein so genannter Kanalplattenadapter 9 eingelassen, an den sich ein Fadenabzugsröhrchen 10 anschließt. Des Weiteren weist das Deckelelement 8 ein Auflösewalzengehäuse 11 auf, in dem eine Auflösewalze 12 rotiert, die mit ihrem Lagerschaft 17 in einer rückseitigen Lagerkonsole 14 des Auflösewalzengehäuses 11 festgelegt ist.The cover element 8, which closes the rotor housing 5 during the spinning operation, is mounted so as to be limitedly rotatable about a pivot axis 16, so that the stationary spinning rotor 4 is accessible when required. At the level of the spinning rotor 2 is in the lid member 8 also, interchangeable, a so-called channel plate adapter 9 is inserted, to which a thread withdrawal tube 10 is connected. Furthermore, the cover element 8 has an opening roller housing 11, in which an opening roller 12 rotated, which is fixed with its bearing shaft 17 in a rear bearing bracket 14 of the opening roller housing 11.

Die Auflösewalze 12 wird durch einen elektromotorischen Einzelantrieb 24, der als Außenläufer ausgebildet ist, angetrieben und weist zur leicht lösbaren Ankoppelung an die Energieversorgung 23 der Offenend-Rotorspinnmaschine im Endbereich ihres Lagerschaftes 17 eine Kontaktspureinrichtung 18 auf. Der elektromotorische Einzelantrieb 24 ist zudem über eine Signalleitung mit der Steuereinrichtung 21 verbunden und über diese ansteuerbar.The opening roller 12 is driven by an electromotive single drive 24, which is designed as an external rotor, and has a contact track device 18 for easily releasable coupling to the power supply 23 of the open-end rotor spinning machine in the end region of its bearing shaft 17. The electromotive single drive 24 is also connected via a signal line to the control device 21 and controlled via this.

Im Auflösewalzengehäuse 11 ist außerdem drehbar ein Faserbandeinzugszylinder 13 gelagert, der durch einen Antrieb 15, vorzugsweise einen Schrittmotor, elektromotorisch beaufschlagbar ist. Auch der Antrieb 15 ist über eine Elektroleitung 26 an die Energieversorgung 23 der Textilmaschine und über eine Signalleitung 25 an die Steuereinrichtung 21 angeschlossen.In Auflösewalzengehäuse 11 also a sliver feed cylinder 13 is rotatably mounted, which can be acted upon by a motor 15, preferably a stepper motor, by an electric motor. Also, the drive 15 is connected via an electric line 26 to the power supply 23 of the textile machine and a signal line 25 to the controller 21.

Nach dem Auftreten einer Unterbrechung des Spinnprozesses durch das Detektieren des Fehlens eines Fadens mittels einer nicht dargestellten Faderüberwachungsvorrichtung wird die Spinnvorrichtung 1 zunächst still gesetzt. Im Anschluss daran wird ein Anspinnvorgang zur Fadenverbindung eingeleitet. Der Anspinnvorgang beginnt mit der Faserbartegalisierung, um gleiche Voraussetzungen für den Anspinnvorgang zu schaffen, unabhängig davon, wie lange die Stillsetzung der Spinnvorrichtung 1 andauert. Im Anschluss an die Faserbartegalisierung wird zunächst der Spinnrotor 2, der im Spinnbetrieb eine Drehzahl von rund 120.000 min-1 oder mehr aufweist, derart hochgefahren, dass der Spinnrotor 2 eine für die erfolgreiche Durchführung des Anspinnvorganges erforderliche Mindestdrehzahl aufweist, die insbesondere von der Ausführung und Betriebsdrehzahl des jeweiligen Spinnrotors 2 abhängig ist. Die Ansteuerung des einzelmotorischen Antriebes 3 des Spinnrotors 2 erfolgt hierzu durch die Steuereinrichtung 21.After the occurrence of an interruption of the spinning process by detecting the absence of a thread by means of a fader monitoring device, not shown, the spinning device 1 is initially set still. Subsequently, a piecing process for thread connection is initiated. The piecing process begins with fiber bargaining to provide the same conditions for the piecing process, regardless of how long the shutdown of the spinning device 1 lasts. Following the Faserbartegalisierung first the spinning rotor 2, which has a speed of about 120,000 min -1 or more in the spinning operation, so high that the spinning rotor 2 has a required for the successful implementation of the piecing operation minimum speed, in particular the execution and operating speed of the respective spinning rotor 2 is dependent. The control of the single-motor drive 3 of the spinning rotor 2 takes place for this purpose by the control device 21st

Zu diesem Zeitpunkt des Anspinnvorganges wird unabhängig vom Hochlaufen des Spinnrotors 2 der elektromotorische Antrieb 24 der Auflösewalze 12 ebenfalls durch die Steuereinrichtung 23 derart angesteuert, dass diese eine von der Mindestdrehzahl des Spinnrotors 2 unabhängige Anspinndrehzahl aufweist, die oberhalb der Betriebsdrehzahl liegt. Die Anspinndrehzahl liegt dabei vorzugsweise zwischen 10 % und 40 % oberhalb der Betriebsdrehzahl der Auflösewalze 11 im Spinnbetrieb.At this time of piecing process, regardless of the start-up of the spinning rotor 2 of the electric motor drive 24 of the opening roller 12 is also controlled by the controller 23 such that it has an independent of the minimum speed of the spinning rotor 2 Anspinndrehzahl, which is above the operating speed. The piecing speed is preferably between 10% and 40% above the operating speed of the opening roller 11 in the spinning operation.

Die Anspinndrehzahl wird vor dem Beginn des Anspinnvorganges erreicht. Mit dem Beginn des Anspinnvorganges wird das Faserband durch die mit der höheren Anspinndrehzahl rotierende Auflösewalze 12 intensiver ausgekämmt und die Fördergeschwindigkeit erhöht, als es im normalen Spinnbetrieb bei Betriebsdrehzahl der Auflösewalze 12 der Fall ist. Somit wird während der Voreinspeisung ein höherer Faserdurchsatz erreicht. Der Aufbau des Faserringes im Spinnrotor 2 erfolgt demgemäß schneller. Nach dem Abschluss der Voreinspeisung wird die Faserzuführung unterbrochen.The piecing speed is reached before the start of the piecing process. With the beginning of the piecing process, the sliver is combed out more intensively by the opening roller 12 rotating at the higher piecing speed and the conveying speed is increased, as is the case in normal spinning operation at operating speed of the opening roller 12. Thus, a higher fiber throughput is achieved during the pre-feed. The structure of the fiber ring in the spinning rotor 2 is accordingly faster. After completion of the pre-feed, the fiber feed is interrupted.

Nun wird das zum Anspinnen vorbereitete Fadenende durch das Abzugsrohr 10 in den rotierenden Spinnrotor 2 eingeführt, in dem es auf den im Spinnrotor 2 zuvor aufgebauten Faserring trifft. Das Fadenende bricht den Faserring auf und verbindet sich mit den Fasern, die sich am Fadenende ablagern, wodurch der Anspinner geschaffen wird.Now, the prepared for piecing yarn end is introduced through the exhaust pipe 10 in the rotating spinning rotor 2, where it strikes the fiber ring previously constructed in the spinning rotor 2. The thread end breaks up the fiber ring and connects to the fibers that deposit at the thread end, creating the piecing.

Der sich an das Ansetzen des Fadens an den Faserring anschließende Vorgang der Einzugsaufaddierung dient dazu, die auftretende Verzögerung der Faserzufuhr zwischen der Voreinspeisung zum Anspinnen und dem erneuten Starten der Faserzuführung zu kompensieren. Eine Verzögerung der Faserzuführung bewirkt, dass der Faden während des Hochlaufens des Spinnrotors 2 Ungleichmäßigkeiten in Gestalt einer Dünnstelle aufweist, die unmittelbar nach dem Anspinner auftreten und die Qualität des Fadens nachhaltig beeinflussen. Über den Zeitraum zur Durchführung des Anspinnens und der Einzugsaufaddierung hinweg nimmt die Drehzahl des Spinnrotors 2 gleichmäßig zu, bis die Betriebsdrehzahl erreicht wird.The subsequent addition of the thread to the fiber ring process of the intake charge addition serves to delay the occurring fiber supply between the Pre-feed for piecing and re-starting the fiber supply to compensate. A delay of the fiber supply causes the yarn during the start-up of the spinning rotor 2 has irregularities in the form of a thin spot, which occur immediately after the piecer and affect the quality of the thread lasting. Over the period for performing the piecing and the draw-in addition, the rotational speed of the spinning rotor 2 increases smoothly until the operating speed is reached.

Bezugnehmend auf Fig. 2 wird ein Diagramm eines Fadenprofils im Anspinnbereich dargestellt, welches sich bei einer Anspinndrehzahl der Auflösewalze 12 von ca. 5.500 min-1 ergibt. Hier ist deutlich zu sehen, wie sich nach dem Anspinnvorgang eine Dünnstelle nach dem Anspinner ausbildet. Diese Abweichung vom Fadenprofil wird erst im weiteren Verlauf über die Fadenlänge an das gewünschte Fadenprofil ausgeglichen, wenn die Offenend-Spinnvorrichtung 1 ihren Betriebszustand nach dem Anspinnvorgang erreicht hat. Das heißt, wenn unter anderem die Auflösewalze 12 und der Spinnrotor 2 mit ihren jeweiligen Betriebsdrehzahlen angetrieben werden.Referring to Fig. 2 a diagram of a thread profile in the Anspinnbereich is shown, which results in a piecing speed of the opening roller 12 of about 5,500 min -1 . Here you can clearly see how a thin spot after the piecing machine forms after the piecing process. This deviation from the thread profile is compensated later in the course of the thread length to the desired thread profile when the open-end spinning device 1 has reached its operating state after piecing. That is, when, among other things, the opening roller 12 and the spinning rotor 2 are driven at their respective operating speeds.

Im Gegensatz dazu zeigt Fig. 3 ein Fadenprofil im Anspinnbereich, welches sich bei einer Anspinndrehzahl der Auflösewalze 12 von ca. 10.000 min-1 ergibt. Unmittelbar nach dem Anspinner wird ein Fadenprofil ausgebildet, welches nahezu dem Fadenprofil entspricht, das während des Spinnvorganges erzielt wird. Dies ist auf die Erhöhung der bereitgestellten Fasermenge zurückzuführen, die durch die erhöhte Anspinndrehzahl der Auflösewalze 12 erreicht wird.In contrast, shows Fig. 3 a thread profile in the Anspinnbereich, which results in a piecing speed of the opening roller 12 of about 10,000 min -1 . Immediately after the piecing a thread profile is formed, which almost corresponds to the thread profile, which is achieved during the spinning process. This is due to the increase in the amount of fiber provided, which is achieved by the increased piecing speed of the opening roller 12.

Um die annähernd erreichte Fadengleichheit aufrecht zu erhalten, wird die Anspinndrehzahl der Auflösewalze 12 erst nach der vollständigen Abarbeitung der Einzugsaufaddierung auf die für den Spinnbetrieb erforderliche optimale Betriebsdrehzahl der Auflösewalze 12 reduziert.In order to maintain the almost achieved thread uniformity, the piecing speed of the opening roller 12 is only after the completion of the intake charge addition to the for the spinning operation required optimum operating speed of the opening roller 12 is reduced.

Diese Vorteile werden nur durch die Erhöhung der Anspinndrehzahl erreicht, wobei die anderen Spinn- und Anspinnparameter unverändert bleiben. Die Erhöhung der Anspinndrehzahl der Auflösewalze 12 führt im Anspinnbereich demzufolge zu einer effektiveren Auskämmung der Fasern.These advantages are achieved only by increasing the piecing speed, with the other spinning and piecing parameters remaining unchanged. The increase in the piecing speed of the opening roller 12 consequently leads to a more effective combing out of the fibers in the piecing area.

Claims (5)

  1. Method for operating an open end spinning device (1), comprising a spinning rotor (2) and an opening roller (12), which can be driven individually, controlled independently of one another, wherein after an interruption of the spinning process has taken place as a result of the detection of the absence of a thread, a piecing process is introduced, comprising a piecing up process, in which an upper thread passes through a fibre ring formed in the spinning rotor (2) and is connected thereto, as well as a subsequent drawing in accumulation, which is used to reduce a thin point in the thread following the piecer, characterised in that during the piecing process, the opening roller (12) is temporarily driven at a piecing speed, which is above the operating speed of the opening roller (12).
  2. Method according to claim 1, characterised in that the piecing speed of the opening roller (12) is reached prior to the beginning of the piecing process.
  3. Method according to either of claims 1 or 2, characterised in that the piecing speed of the opening roller (12) is maintained during the complete working off of the drawing in accumulation.
  4. Method according to claim 3, characterised in that the speed control of the opening roller (12) during the piecing process and the process of the drawing in accumulation take place independently of other parameters influencing these processes, by means of a control mechanism (21).
  5. Method according to any one of claims 1 to 4, characterised in that the piecing speed is between 10% and 40% above the operating speed of the opening roller (12).
EP06753702A 2005-07-19 2006-05-18 Method for operating an open-end spinning device Expired - Fee Related EP1910593B1 (en)

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DE102005033562A DE102005033562A1 (en) 2005-07-19 2005-07-19 Method for operating an open-end spinning device
PCT/EP2006/004711 WO2007009525A1 (en) 2005-07-19 2006-05-18 Method for operating an open-end spinning device

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EP1910593A1 EP1910593A1 (en) 2008-04-16
EP1910593B1 true EP1910593B1 (en) 2012-04-25

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EP (1) EP1910593B1 (en)
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DE102005059078A1 (en) * 2005-12-10 2007-06-14 Saurer Gmbh & Co. Kg Method for piecing a thread and rotor spinning machine for carrying out the method
DE102008055845A1 (en) * 2008-11-04 2010-05-06 Oerlikon Textile Gmbh & Co. Kg Open-end spinning device
DE102009030677A1 (en) * 2009-06-26 2010-12-30 Oerlikon Textile Gmbh & Co. Kg Method for operating a workstation and workstation of an open-end rotor spinning machine
IT201600071598A1 (en) * 2016-07-08 2018-01-08 Savio Macch Tessili Spa METHOD OF LEVERAGE IN AN OPEN-END TYPE SPINNING MACHINE
DE102018105933A1 (en) * 2018-03-14 2019-09-19 Maschinenfabrik Rieter Ag A method for forming a thread loop and for separating a piece of thread to be attached and a piece of thread to be removed, pressure roller unit and suction nozzle

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CN101223305A (en) 2008-07-16
WO2007009525A1 (en) 2007-01-25
DE102005033562A1 (en) 2007-01-25
EP1910593A1 (en) 2008-04-16
CN101223305B (en) 2011-08-31
US7644570B2 (en) 2010-01-12
US20090120052A1 (en) 2009-05-14

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