EP2267200B1 - Procédé de fonctionnement d'un poste de travail et poste de travail d'un métier à tisser à rotor à extrémité ouverte - Google Patents

Procédé de fonctionnement d'un poste de travail et poste de travail d'un métier à tisser à rotor à extrémité ouverte Download PDF

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Publication number
EP2267200B1
EP2267200B1 EP20100005340 EP10005340A EP2267200B1 EP 2267200 B1 EP2267200 B1 EP 2267200B1 EP 20100005340 EP20100005340 EP 20100005340 EP 10005340 A EP10005340 A EP 10005340A EP 2267200 B1 EP2267200 B1 EP 2267200B1
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EP
European Patent Office
Prior art keywords
spinning
thread
speed
spinning rotor
rotor
Prior art date
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Application number
EP20100005340
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German (de)
English (en)
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EP2267200A1 (fr
Inventor
Omar Abu Mohamed Abu-Amna
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
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

Definitions

  • the invention relates to a method for operating a workstation of an open-end rotor spinning machine and a workstation with control means for performing the method, wherein accelerated after a cheese / empty tube change the spinning rotor, fed to the spinning rotor a sliver via a feed roller, at a predetermined piecing speed an auxiliary thread in fed to the spinning rotor, the auxiliary thread connected to the spun yarn by a piecing, started the thread withdrawal, disposed of the auxiliary thread and then the spun yarn is fixed to the empty tube.
  • the DE-A1-10 2007 056561 shows a method for operating a job, wherein accelerated after a cheese change of the spinning rotor.
  • the DE 101 39 072 A1 describes a device for re-spinning at jobs of an open-end rotor spinning machine, each having a spinning device and a winding device, with an auxiliary thread supplying device for providing a necessary after a cheese / empty tube change for re-spinning auxiliary thread and a thread laying device for fixing a new strand to a held in a creel of the winder empty tube.
  • the fixing is carried out by pinching the thread between the empty tube and arranged on the coil frame sleeve plate.
  • the prepared yarn end of the auxiliary thread kept ready by the piecing elements of the work station is first fed briefly into the rotating spinning rotor. Then the auxiliary thread, which is then connected via a so-called piecing with the new spun yarn is disposed of by a thread take-off device and a suction nozzle immediately. This disposal continues until the piecer passes a sensor device and is disconnected. If the piecer is separated, the actual application of the spun yarn to the empty tube and the winding of a thread reserve on the empty tube takes place. That is, there are now immediately behind each other some rapid movements of the handling devices of the yarn laying device. During this process, the thread comes to a stop on the sleeve plate. Since the spinning device simultaneously produces continuous filament, this filament is temporarily stored in a storage nozzle.
  • the operating speeds of the spinning rotors and the associated yarn take-off speeds are increasing with the progressive development of the rotor spinning machines and the increasing productivity requirements.
  • the thread end to be applied to the empty tube comes to a standstill during application, while the thread withdrawal device continuously withdraws the strand from the spinning rotor rotating at its operating speed.
  • the yarn length produced during the application process becomes larger and larger with increasing operating speed of the spinning rotor, but the above-mentioned storage nozzle can only absorb a limited thread length. For this reason, the application process must be performed faster and faster, and the drives of the winding shaft and the thread guide on the winding device of the job must be taken as sudden as possible after setting the spin path. The sudden start can lead to errors in the function.
  • a misalignment of the thread guide may occur, resulting in an intolerable offset on the spool. But above all, it may happen that due to the high process dynamics of the Filament is not securely clamped between the empty tube and the tube plate. This leads to production stoppages and thus reduces the productivity of the spinning machine in an undesirable manner.
  • the length of the spun yarn produced during the application process can be limited so that it can be taken up by known yarn storage devices and yet sufficient time is available for a secure application of the spun yarn.
  • the operating speed that is, the rotational speed of the spinning rotor in normal spinning operation, can be selected so that the required productivity is achieved.
  • the acceleration of the spinning rotor and according to the yarn withdrawal and the feed roller for carrying out the setting of the spun yarn is reduced to the empty tube after production of the piecing. In this way it can be ensured that until the disposal of the auxiliary thread and the piecing the spinning rotor has not already reached its operating speed.
  • the acceleration of the spinning rotor is reduced to such an extent that the spinning rotor rotates at a constant speed.
  • the acceleration of the spinning rotor is reduced so much that the spinning rotor is decelerated.
  • the spinning rotor can first be accelerated to the production of a piecing to the required piecing speed. Subsequently, the speed is reduced so much that the fixing of the spun yarn to the empty tube can be done safely.
  • the spinning rotor is accelerated to its operating speed after fixing the spun yarn to the empty tube.
  • the acceleration of the spinning rotor and according to the thread take-off and the feed roller is initially reduced after preparation of the piecing, the acceleration of the spinning rotor is increased again, then the strand is fixed to the empty tube and the spinning rotor is further accelerated to its operating speed.
  • the acceleration of the spinning rotor In a change in the acceleration of the spinning rotor not only the acceleration of the thread take-off must be changed at the same time, but also the supply of the sliver. Due to the scope of the opening roller can despite a corresponding Speed or acceleration adjustment of the feed roller in an abrupt acceleration change, the feeding speed of the sliver are not synchronized synchronously with the rotor speed.
  • the occurring time offset is also referred to as fiber fly time. For this reason, there may be a thin spot in the spun yarn. If the acceleration is increased again and then the filament is applied to the empty tube, the thin point can be removed before applying.
  • a workstation of an open-end rotor spinning machine with control means for carrying out the method according to the invention wherein handling means are provided to apply the drawn from a spinning rotor filament to an empty tube after a cheese / empty tube change, wherein the spinning rotor has a drive and a thread take-off for pulling off the spinning thread and a feed roll, via which a fiber strand is supplied to the spinning rotor, and wherein the drive of the spinning rotor, the thread suit, the feed roller and the handling means are controllable by the control means that the fixing of the spun yarn the empty tube at a rotational speed of the spinning rotor below the operating speed at which rotates the spinning rotor in the normal spinning operation and at a yarn withdrawal speed below the yarn withdrawal speed in the normal spinning operation and a korrespondi to it erenden speed of the feed roller, takes place.
  • Fig. 1 one half of a per se known open-end rotor spinning machine is indicated and marked with 1.
  • Such spinning machines have a plurality of jobs 2, which are each equipped with a spinning device 3 and a winding device 4.
  • the sliver 5 presented in sliver cans 6 is spun into threads 7, which are wound on the winding devices 4 to cheeses 8.
  • the spinning devices 3 have for this purpose a driven by a drive 27 rotating spinning rotor 26.
  • the sliver 6 is fed to the spinning rotor 26 via a feed roller 25.
  • the winding devices 4 are each provided with a coil frame 9 for rotatably supporting an empty tube 10, or a cross-wound bobbin 8 and a winding drum 11 for driving the cross-wound bobbin.
  • the workstations 2 each have a Fadenchangier gifted 18, a workstation own suction nozzle 14 and the workstation's own Anspinnorgane 20. That is, the jobs 2 are equipped so that they can fix thread breaks automatically.
  • the open-end spinning machine 1 also has a bobbin transport device 12 for disposing of the cheeses 8 finished on the winding devices 4.
  • a service unit 16 On or on the spinning machine 1, on a guide rail 13 and a support rail 15 movable, a service unit 16 is arranged.
  • the drive of this service unit 16 consists of rollers 17 and support wheels 19.
  • the supply of the service unit 16 with electrical energy and compressed air is preferably carried out via a drag chain.
  • Such service units 16 constantly patrol along the open-end spinning machine 1 and engage automatically when a need for action arises at one of the workstations 2. Such a need for action exists, for example, if at one of the workstations 2 a full cross-wound bobbin has to be exchanged for a new empty tube and then re-spun again.
  • the service unit 16 has for this purpose, as is known, numerous handling devices that allow a proper cheese / Leerhülsencic. Of these numerous handling devices are in the drawings, for better clarity, only a so-called thread supply tube 22 with its connected Auxiliary thread supply device 21 and the thread laying device 23 according to the invention. With the help of the handling devices, the service unit of the workstation can provide an auxiliary thread 24.
  • the thread laying device 23 consists essentially of a support arm 39, which is also mounted in an intermediate wall of the service unit 16.
  • the support arm 39 which has a head end element 40 at its end, is mounted with limited pivoting relative to its pivot axis 42 as well as axially displaceable.
  • a Fadenanlegerkopf is articulated movably on the head element 40 via a pivot axis, which carries various functional elements, such as thread cutting device 31, guide roller 33 and yarn brake 35.
  • the workstations 2 each have a control device 45, which monitors and controls the processes at the workstation 2.
  • the control device 45 is connected via control lines 48 to the handling devices of the workstation.
  • the control devices 45 of the workstations 2 are connected to a machine-wide bus system 47, via which the control devices 45 communicate with a (not shown) central control unit and the control device 46 of the service unit 16.
  • the control device 46 is in turn connected via the control lines 49 to the handling devices of the service unit 16 and thus controls together with control devices 45 of the workstation the operations of re-spinning described below and the application of the thread to the empty tube.
  • the piecing has passed, the actual application of the spun yarn 7 to the empty tube 10 and the winding of the thread reserve on the empty tube 10 takes place.
  • the new filament 7 is cut by the thread cutting device 31 just above the empty tube 10 and simultaneously clamped by the thread brake 35, which is positioned below the empty tube 10.
  • the trimmed, still on the thread withdrawal device 28 running thread piece is disposed of via the suction nozzle 14.
  • Thread separation is closed by pivoting the head element 40 of the sleeve plate 30 and the spun yarn 7 securely clamped between the empty tube 10 and the sleeve plate 30.
  • the thread cutting device 31 and the thread brake 35 are opened.
  • the filament 7 is positioned in front of the so-called Fadenreserverille the empty tube 10. Subsequently, the winding drum 11 is started and accelerates the over-friction resting empty tube 10 to winding speed.
  • the yarn brake 35 is closed.
  • the remaining turns of the thread reserve are wound up with increased thread tension and offset by a few millimeters outwards, so that the thread beginning is wrapped and thus securely fixed.
  • the Fig. 2 shows a curve N of the rotational speed n of the spinning rotor 26 and the course V of the thread withdrawal speed v over the time t, as is known in the prior art.
  • the spinning rotor 26 is used to make a piecer between the auxiliary thread 24 and the new spun yarn 7 is initially accelerated until it reaches its piecing speed n A at the time t A.
  • the piecing is produced and the thread withdrawal device 54 starts its work and pulls the spun yarn 7 from the spinning rotor 26 with the yarn withdrawal speed v corresponding to the rotational speed n of the spinning rotor 26.
  • the feed roller 25 leads with appropriate speed to the sliver 6.
  • the spinning rotor 26 is continuously accelerated until it has its operating speed n B and the yarn take-off its associated yarn withdrawal speed V B reached at time t B. Only then is the application process described above of the spun yarn 7 carried out on the empty tube 10.
  • the Figures 3 and 4 show time courses according to the present invention.
  • the Fig. 3 represents a possible time course N 1 of the rotational speed n of the spinning rotor 26 and the associated course V 1 of the yarn withdrawal speed v.
  • the spinning rotor 26 is first accelerated to the piecing speed n A and at time t A a piecing produced and the thread take-off device in progress set. Shortly thereafter at the time t 1 , the acceleration process of the spinning rotor is interrupted.
  • the speed n for setting the spun yarn 7 on the empty tube 10 is kept constant at the value n L1 , so that the application process can be carried out at a reduced take-off speed v L1 .
  • the application process is completed and the yarn is transferred to the Fadenchangier Anlagen 18, so that the spinning rotor is accelerated again until the time t B 'the operating speed n B and the associated yarn withdrawal speed v B is reached.
  • the application process can also be performed only at the time t L2 .
  • the rotational speed of the spinning rotor 26 is then kept constant according to the embodiment described above until the time t 2 . Until then, the thread and the piecemeal are removed. The spinning rotor 26 and the thread take-off 54 are accelerated again from the time t 2 .
  • the thin spot in the spun yarn 7, which arises due to the delayed tracking of the sliver 6 is removed and at time t L2 is applied at the rotor speed n L2 and the yarn withdrawal speed v L2 of the spun yarn to the empty tube.
  • the spinning rotor 26 then moves with unchanged acceleration up to its operating speed n B.
  • the Fig. 4 shows further variants of the present invention.
  • possible courses N 1 , N 2 , N 3 of the rotational speed n of the spinning rotor 26 are shown over the time t.
  • the acceleration of the spinning rotor 26 is reduced at the time t 1 .
  • the spinning rotor is further accelerated despite the reduction.
  • the reduction may be sufficient to allow for secure application.
  • the course N 1 corresponds to that of Fig. 3 , The speed is initially constant after time t 1 here. If the acceleration is reduced even further, you get the course N 3 . The acceleration then becomes negative and the speed decreases.

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

Claims (7)

  1. Procédé d'exploitation d'un poste de travail (2) d'un métier à filer (1) à bout ouvert, sachant qu'à la suite d'un remplacement d'une bobine croisée par une canette vide, le rotor de filage (26) est accéléré, une bande de fibres (6) est apportée au rotor de filage via un cylindre d'alimentation (25), un fil auxiliaire (24) est alimenté dans le rotor de filage (26) à une vitesse de rotation de rattachage prédéterminée (nA), le fil auxiliaire (24) est relié au fil de filage (7) par un rattacheur, l'organe de dévidage de fil (54) est mis en marche, le fil auxiliaire (24) est éliminé, puis le fil de filage (7) est fixé sur la canette vide (10),
    caractérisé en ce que la fixation du fil de filage (7) sur la canette vide (10) est effectuée à une vitesse de rotation (nL1, nL2) du rotor de filage (26) inférieure à sa vitesse de rotation d'exploitation (nB), à laquelle tourne le rotor de filage (26) pendant le fonctionnement normal de filage, et à une vitesse de dévidage de fil (vL1, vL2) inférieure à la vitesse de dévidage de fil (vB) pendant le fonctionnement normal de filage, ainsi qu'à une vitesse de rotation correspondante du cylindre d'alimentation (25).
  2. Procédé selon la revendication 1, caractérisé en ce que, à la suite de la réalisation du rattachage, l'accélération du rotor de filage (26) et en conséquence de l'organe de dévidage de fil (54) et du cylindre d'alimentation (25) est réduite afin de réaliser la fixation du fil de filage (7) sur la canette vide (10).
  3. Procédé selon la revendication 2, caractérisé en ce que l'accélération du rotor de filage (26) est suffisamment réduite pour que le rotor de filage (26) tourne à une vitesse de rotation constante (nL1).
  4. Procédé selon la revendication 2, caractérisé en ce que l'accélération du rotor de filage (26) est suffisamment réduite pour que le rotor de filage (26) décélère.
  5. Procédé selon l'une des revendications 2 à 4, caractérisé en ce que, à la suite de la fixation du fil de filage (7) sur la canette vide (10), le rotor de filage (26) est accéléré à sa vitesse de rotation d'exploitation (nB).
  6. Procédé selon la revendication 1, caractérisé en ce que, à la suite de la réalisation du rattachage, l'accélération du rotor de filage (26) et en conséquence de l'organe de dévidage de fil (54) et du cylindre d'alimentation (25) est d'abord réduite et en ce que, ensuite, l'accélération du rotor de filage (26) est à nouveau augmentée, le fil de filage (7) est fixé sur la canette vide (10) et le rotor de filage (26) continue à être accéléré jusqu'à sa vitesse de rotation d'exploitation (nB).
  7. Poste de travail (2) d'un métier à filer (1) à bout ouvert, avec des moyens de commande (45, 46) pour la mise en oeuvre du procédé selon l'une des revendications 1 à 6, sachant que des équipements de manipulation sont présents pour, à la suite d'un remplacement d'une bobine croisée par une canette vide, appliquer le fil de filage (7) dévidé d'un rotor de filage (26) sur une canette vide (10), que le rotor de filage (26) présente un entraînement (27) et qu'un organe de dévidage de fil (54) est présent pour dévider le fil de filage (7), ainsi qu'un cylindre d'alimentation (25) au moyen duquel une bande de fibres (6) peut être apportée au rotor de filage (26), caractérisé en ce que l'entraînement (27) du rotor de filage (26), l'organe de dévidage de fil (54), le cylindre d'alimentation (25) et les équipements de manipulation peuvent être commandés à l'aide des moyens de commande (45, 46) de telle sorte que la fixation du fil de filage (7) sur la canette vide (10) s'effectue à une vitesse de rotation (nL1, nL2) du rotor de filage (26) inférieure à la vitesse de rotation d'exploitation (nB) à laquelle tourne le rotor de filage (26) pendant le fonctionnement normal de filage, et à une vitesse de dévidage de fil (vL1, vL2) inférieure à la vitesse de dévidage de fil (vB) pendant le fonctionnement normal de filage, ainsi qu'à une vitesse de rotation correspondante du cylindre d'alimentation (25).
EP20100005340 2009-06-26 2010-05-21 Procédé de fonctionnement d'un poste de travail et poste de travail d'un métier à tisser à rotor à extrémité ouverte Active EP2267200B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200910030677 DE102009030677A1 (de) 2009-06-26 2009-06-26 Verfahren zum Betreiben einer Arbeitsstelle und Arbeitsstelle einer Offenend-Rotorspinnmaschine

Related Parent Applications (1)

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DE102009030677 Previously-Filed-Application 2009-06-26

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EP2267200A1 EP2267200A1 (fr) 2010-12-29
EP2267200B1 true EP2267200B1 (fr) 2012-08-29

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EP20100005340 Active EP2267200B1 (fr) 2009-06-26 2010-05-21 Procédé de fonctionnement d'un poste de travail et poste de travail d'un métier à tisser à rotor à extrémité ouverte

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Country Link
EP (1) EP2267200B1 (fr)
CN (1) CN101935897B (fr)
BR (1) BRPI1002046A2 (fr)
DE (1) DE102009030677A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019116671A1 (de) * 2019-06-19 2020-12-24 Maschinenfabrik Rieter Ag Spinnmaschine sowie Verfahren zum Betreiben einer Spinnstelle einer Spinnmaschine
DE102019129499A1 (de) * 2019-10-31 2021-05-06 Saurer Spinning Solutions Gmbh & Co. Kg Offenend-Spinnmaschine sowie Verfahren und Steuereinrichtung zum Betreiben einer solchen Offenend-Spinnmaschine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4432702B4 (de) * 1994-09-14 2005-08-18 Saurer Gmbh & Co. Kg Serviceeinrichtung für eine Kreuzspulen herstellende Textilmaschine
DE10139072B4 (de) 2001-08-09 2009-12-17 Oerlikon Textile Gmbh & Co. Kg Serviceaggregat zum Wiederanspinnen von Arbeitsstellen einer Offenend-Spinnmaschine
DE10327370A1 (de) * 2003-06-18 2005-01-13 Rieter Ingolstadt Spinnereimaschinenbau Ag Verfahren und Vorrichtung zum Anspinnen eines Fadens in einer Offenend-Spinnvorrichtung
DE102004029048A1 (de) * 2004-06-14 2005-12-29 Wilhelm Stahlecker Gmbh Verfahren an einer Offenend-Rotorspinnmaschine zum halb-automatischen Anspinnen
DE102005033562A1 (de) * 2005-07-19 2007-01-25 Saurer Gmbh & Co. Kg Verfahren zum Betreiben einer Offenend-Spinnvorrichtung
CZ304396B6 (cs) * 2006-05-26 2014-04-16 Rieter Cz S.R.O. Způsob a zařízení k individuálnímu zapřádání příze na pracovním místě rotorového dopřádacího stroje
DE102007038871B4 (de) * 2006-08-18 2022-02-17 Rieter Ingolstadt Gmbh Verfahren zum Anspinnen an Textilmaschinen mit einer Mehrzahl von Spinnstellen
DE102007056561A1 (de) * 2007-08-25 2009-02-26 Oerlikon Textile Gmbh & Co. Kg Kreuzspulen herstellende Textilmaschine

Also Published As

Publication number Publication date
EP2267200A1 (fr) 2010-12-29
CN101935897A (zh) 2011-01-05
BRPI1002046A2 (pt) 2011-07-05
DE102009030677A1 (de) 2010-12-30
CN101935897B (zh) 2015-02-11

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