EP2813605A1 - Procédé de fonctionnement d'un poste de travail d'un métier à filer à rotor à bout libre et poste de travail associé - Google Patents

Procédé de fonctionnement d'un poste de travail d'un métier à filer à rotor à bout libre et poste de travail associé Download PDF

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Publication number
EP2813605A1
EP2813605A1 EP14001709.6A EP14001709A EP2813605A1 EP 2813605 A1 EP2813605 A1 EP 2813605A1 EP 14001709 A EP14001709 A EP 14001709A EP 2813605 A1 EP2813605 A1 EP 2813605A1
Authority
EP
European Patent Office
Prior art keywords
thread
spinning
yarn
open
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14001709.6A
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German (de)
English (en)
Inventor
Christoph Haase
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.)
Saurer Spinning Solutions GmbH and Co KG
Original Assignee
Saurer Germany GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saurer Germany GmbH and Co KG filed Critical Saurer Germany GmbH and Co KG
Publication of EP2813605A1 publication Critical patent/EP2813605A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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 invention relates to a method for operating a workstation of an open-end rotor spinning machine and to an associated workstation according to the preamble of claim 1 or the preamble of claim 5.
  • Open-end rotor spinning machines are widely used in the textile industry. These textile machines, which are described in detail in numerous patent applications, usually have a variety of similar jobs, on each of which a preferably presented in a sliver can sliver is spun into a thread and then wound into a cheese.
  • the individual jobs have for this purpose in each case a spinning device and a winding device, wherein both the working organs of the spinning device and the working members of the winding device are often acted upon by machine-length drive means.
  • the drive of the coil drive roller arranged in the area of the winding devices also takes place in these textile machines via a machine-length drive shaft driven on the machine end.
  • a reciprocating yarn guide rod is present, which is acted upon by a machine end side arranged traverse gear and at the thread guides of the numerous jobs are fixed.
  • these open-end rotor spinning machines on thread take-off devices whose driven take-off rolls are usually also part of a continuous drive shaft.
  • Open-end rotor spinning machines are known in which in each case different individual drives are arranged in the field of jobs.
  • the workstations of these rotor spinning machines each have, for example, an open-end rotor spinning device with a single-motor driven sliver feed cylinder, a single-motor driven thread take-off device, a single-motor driven paraffining device and a single drive for the bobbin drive roller.
  • the jobs of these known open-end rotor spinning machines are, regardless of whether in the field of jobs individual drives are present or machine end side arranged drives are used, serviced by service units that patroll for example along the jobs of open-end rotor spinning machines and automatically intervene when at the jobs an accident, for example, a thread break, has occurred.
  • the service unit runs to the affected workplace, locks there and searches with a pivotally mounted, under horrbeetzmacherbaren suction nozzle accumulated after a yarn breakage on the cheese thread.
  • Such service units have, in addition to a suction nozzle on a number of other thread handling elements that allow the service units to introduce the recorded with her suction nozzle after appropriate preparation in the open-end rotor spinning of the relevant job and there to spin new to a revolving around the spinning rotor fiber ring.
  • the drive of the individual yarn handling elements of the service unit including the suction nozzle is preferably carried out via an electric motor which drives a cam disk package which is connected via special lever linkage with the various yarn handling elements.
  • the workplaces of such semi-automatic open-end rotor spinning machines each have a spinning device with a rotating in a rotor housing at high speed spinning rotor for producing a yarn, a sliver disintegrating device with a sliver pick-up roller and a motor driven Einzelerband Faserbandzu Fightingzylinder, a single motor driven yarn withdrawal device and a winding device for producing a in one Coil frame rotatably supported cheeses.
  • Each of the jobs also has a device for the defined cutting to length of a thread manually retrieved from the cross-wound bobbin, a thread storage device for receiving a certain amount of thread and a selectively controllable drive means for lifting the cross-wound bobbin from the bobbin drive roller.
  • the drive of the thread withdrawal device of these jobs is reversible.
  • workstations have a manually activatable control device, which ensures an automatic, timely execution of the important piecing process steps.
  • the control device After being activated, the control device ensures, for example, that during the piecing process the drive of the thread withdrawal device, the drive of the sliver feed cylinder and the drive device for lifting the cross-wound bobbin are actuated in accordance with a predetermined piecing program. That is, the manually cut, in the yarn withdrawal tube ready laid yarn end is first applied backwards after actuation of the control device and applied to a rotating with the spinning rotor fiber ring, which is thereby broken. Subsequently, the newly wound thread is withdrawn immediately by the thread withdrawal device from the open-end spinning device.
  • a thread storage length is provided for the diameter-dependent run-up of the cross-wound bobbin. Since the thread take-off device due to their relatively low moment of inertia very quickly reaches its predetermined yarn transport speed and subtracts the newly emerging thread correspondingly fast, the associated bobbin drive roller the cheese, especially if it already has a slightly larger diameter, but can not accelerate fast enough, it is these known jobs in connection with a piecing process, although the winding speed of the cheese in the current spinning operation to achieve a Anspannverzuges slightly above the yarn transport speed of the thread take-off, to create a thread loop, which must be temporarily stored temporarily in the thread storage device.
  • this memory length can be reduced if the cross-wound bobbin is placed on the drive roller and accelerated before the start of the thread take-off by the thread take-off device;
  • a minimum memory length is ultimately unavoidable in order to prevent so-called "thread breakers".
  • the minimum memory length is particularly high when the piecing is performed at operating speed of the spinning rotor.
  • the present invention seeks to provide a method that allows an improvement in the operating conditions occurring after a piecing process especially at jobs of open-end rotor spinning machines, which have a single-motor driven thread take-off device.
  • the claim 5 describes a job for performing the method according to the invention; claims 6 and 7 are directed to advantageous embodiments of such a job.
  • the method described in claim 1 has, inter alia, the advantage that it can be realized very inexpensively in a simple manner. That is, the control devices of the jobs of, for example, semi-automatic open-end rotor spinning machines can be modified by software without much effort that after a spin interruption at the affected job so in the subsequent piecing process it is intervened that the yarn transport speed of the finished yarn initiated by the yarn draw-off device is temporarily lowered to a level which is below the level of the yarn transporting speed which is predetermined at the work stations during ongoing spinning operation.
  • the yarn transport speed of the finished yarn is temporarily reduced by 1-3% below the predetermined during the spinning operation level of the yarn transport speed.
  • the sliver feeding speed initiated by the sliver drawing-in cylinder is adapted to the change in the yarn transporting speed of the finished yarn.
  • the yarn transport speed of the finished yarn is raised again to the predetermined level in the current spinning operation before the cached during the piecing process in the yarn storage device thread loop has dissolved.
  • the termination of the lowering of the yarn transport speed before the consumption of the stored thread length is therefore important, since otherwise the speed difference between the thread withdrawal and thread rewind is too large, if the stored thread length can no longer act as a damper.
  • the dissolution of the thread loop can be detected by sensors, for example, but other methods, such as a timed switching the thread transport or -abppings nie are possible.
  • the open-end rotor spinning machine on jobs each having a control device which is formed and connected to the individual drives of the thread take-off device and the sliver draw-in that upon activation of the control device in the course of a piecing process, an infeed of fibers in the spinning at operating speed spinning rotor, a time and length accurate return promotion of the cut end of the thread in the spinning rotor and a deduction of the finished thread from the spinning device is started.
  • the control device is modified so that the Fadenabzugs- or -transport als of the finished thread initiated by the thread take-off device is temporarily below the level of yarn transport speed, which is specified at the affected workstation during the ongoing spinning operation to maintain a constant winding tension. That is, the controllers
  • the workstations of, for example, semi-automatic open-end rotor spinning machines are modified by software so that after a winding interruption at a workstation during the subsequent piecing process defined in the sense of "lowering the yarn withdrawal speed" is intervened.
  • the time span in which undefined operating conditions prevail at the affected workstation can be significantly reduced. That is, since after the loosening of the thread loop at the job concerned proper operating conditions are ensured again, a shortening of the time for their resolution has a positive effect. Overall, the fluctuations in the winding tension occurring at a workstation in connection with a piecing process can be significantly reduced.
  • very good thread removal devices are suitable, which are each driven by a stepper motor. That is, with such thread take-off devices can be realized in case of need in a simple way at any time changes the Fadenabzugs- or -transport nieen.
  • the jobs of the open-end rotor spinning machine also each have a thread storage device which is designed as a pneumatically acted thread store.
  • the used pneumatically loaded yarn store stores not only the thread length, which is needed at the beginning of piecing in connection with the thread return, but temporarily also temporarily stores the thread excess occurring in connection with the piecing process.
  • Thread storage device is temporarily formed a continuous thread loop, which is dissolved again over time.
  • the air supply for the yarn storage device is switchable. Consequently, due to the shortening of the time to the resolution of the thread loop and the air supply to the yarn storage device can be switched off earlier, resulting in additional energy savings.
  • FIG. 1 one half of a workstation 2 of a semiautomatic open-end rotor spinning machine 1 is shown.
  • such textile machines usually have a plurality of work stations 2, which are each equipped with an open-end spinning device 3 and a winding device 33.
  • the sliver 34 presented in sliver cans 28 is spun into a yarn 30, which is wound on the winding device 33 to form a cross-wound bobbin 22.
  • the winding devices 33 have, as is known, in each case a coil frame 21 for rotatably supporting the sleeve of a cheese 22, a bobbin drive roller 23, a Fadenchangier observed 26 and a device 7 for lifting the cross-wound bobbin 22 from the bobbin drive roller 23.
  • the device 7 is designed for example as a thrust piston, which is connected via a pneumatic line 24, in which a solenoid valve 17 is turned on, to a (not shown) overpressure source.
  • a brake device is often arranged on the creel 21, by means of which a free rotation of the cross-wound bobbin 22 lifted off the bobbin drive roller 23 can be prevented if necessary.
  • the drive of the bobbin drive roller 23 takes place as a group drive. That is, it is a machine-length, preferably machine end side driven drive shaft provided on which the individual coil drive rollers 23 are fixed.
  • the winding device 33 may also be a, also known per se, (not shown) thread lifting device to be installed. Such a thread lifting device prevents the thread during the piecing process can be unintentionally detected by the traversing Fadenchangier Anlagen 26.
  • the thread lifting device formed, for example, as a hinged plate holds the thread during the actual piecing initially at a distance above the reciprocating Fadenchangier issued 26th
  • the spinning device 3 has a spinning rotor 4 revolving in a rotor housing at high speed during spinning operation, as well as a sliver opening device 25 with a sliver opening roller 12 and a sliver feed cylinder 14.
  • the spinning rotor 4 is mounted rotatably in a support disk bearing 5 and is driven by a machine-tangential belt 6.
  • a sensor device 8 can also be provided, which is then connected to the control device 9 via a signal line 40.
  • the sliver pick-up roller 12 is preferably also acted upon by a machine-tangential belt 13, while the sliver feed cylinder 14 is driven by a motor 15 single motor.
  • the drive of the Faserbandeinzugzylinders 14, for example, a stepper motor 15 is also connected via a control line 16 to the control direction 9.
  • the work stations 2 each have a thread withdrawal device 18, whose preferably designed as a stepper motor drive 19 via a control line 20 with the control direction 9 is in communication.
  • a thread storage device 37 In the direction of the thread 30 seen behind the thread take-off device 18 also has a thread storage device 37, preferably a pneumatically actuable storage nozzle, is provided.
  • the thread storage device 37 is connected via a pneumatic line 38 to a (not shown) vacuum source.
  • a (not shown for reasons of clarity) valve device In the pneumatic line 38 a (not shown for reasons of clarity) valve device is turned on, by means of which a defined vacuum setting of the thread storage device 37 is possible.
  • a stationary device 10 is advantageously arranged, which allows a defined cutting to length of a manually retrieved from the cheese 22 thread whose end can be subsequently treated by the operator by a thread preparation device, which essentially consists of a handle and a rough thread treatment area to edit the thread end exists.
  • control device 9 which controls, for example, the drive of the device 7 for lifting the cross-wound bobbin 22, the drive 16 of the thread withdrawal device 18, the drive 15 of the sliver feed cylinder 14 and the valve device for the thread storage device 37, via a signal line 29 with a Switching element 27 connected, which can be activated manually if necessary.
  • the spinning rotor 4 is not supported in a support disk bearing 5, but stored in a, only schematically indicated magnetic bearing 31.
  • the spinning rotor 4 is preferably acted upon by an electric motor in such a case by a single drive, which communicates with the control device 9, for example via a control line 45.
  • the sliver pick-up roller 12 may be driven by a single motor. That is, within the clothing ringes of the opening roller 12, for example, an external rotor drive 35 may be arranged, which is also connected via a control line 32 to the control device 9.
  • the thread 30 produced in the spinning device 3 is withdrawn by the thread withdrawal device 18 at a predetermined yarn withdrawal speed and conveyed to a winding device 33 at a yarn transport speed corresponding to the yarn withdrawal speed, where it is wound onto a cross-wound bobbin 22 rotating at a predetermined rotational speed ,
  • the winding speed of the thread is somewhat, for example 3%, above the speed at which the thread withdrawal device 18 pulls and transports the thread 30 out of the open-end spinning device 3, with the result that the thread 30 is largely constant Winding tension of about 3% is wound on the cheese 22.
  • the cross-wound bobbin 22 is rotatably mounted between the arms of a creel 21 and lies with its surface on a drivable bobbin drive roller 23. That is, the cross-wound bobbin 22 is driven by the bobbin drive roller 23 rotating at a predetermined operating speed by frictional engagement in the winding direction.
  • the thread 30 running onto the bobbin is laid by means of a thread-changing device 26 so that it runs onto the mantle surface of the cheese 22 in intersecting layers.
  • the controller 9 ensures that the relevant job 2 is stopped immediately. That is, initially in the spinning device 3 of the single drive 15 of the Faserbandeinzugzylinders 14 is turned off, thus stopping a further fiber feed to the spinning rotor 4.
  • the single drive 19 of the thread withdrawal device 18 is switched off and the cross-wound bobbin 22 is lifted off the bobbin drive roller 23 by the device 7.
  • the spinning rotor 4 driven for example via a tangential belt 6 or the sliver opening roller 12 driven via a tangential belt 13 continue to rotate at operating speed.
  • the open-end spinning device 3 is first opened manually by an operator. If the open-end spinning device 3 has a spinning rotor 4 driven by a tangential belt 6 and a sliver-opening roller 12 driven by a tangential belt 13 (exemplary embodiment Fig. 1 ), these are automatically separated when opening the open-end spinning device 3 from its drive means and run to a standstill.
  • the spinning rotor 4 is preferably additionally braked by a special rotor brake.
  • the open-end spinning device 3 is closed again by the operating personnel and in this case, for example, the spinning rotor 4 and the sliver-opening roller 12 respectively at their associated tangential belt 6 or 13 created.
  • the spinning rotor 4 and the sliver opening roller 12 then run up to their operating speed.
  • accumulated after the yarn breakage on the surface of the cheese 22 thread 30 is manually retrieved by an operator of the cheese 22 and inserted the tightly drawn thread 30 in the standing thread withdrawal device 18.
  • the thread withdrawal device 18 is then driven shortly counter to the thread take-off direction, while the thread 30 is sucked into the pneumatic thread storage device 37 with a predetermined thread length.
  • the thread 30 is then manually cut to length on the stationary device 10, which is arranged in the region of the spinning device 3, and the thread end is manually prepared for re-spinning by means of a preparation device, which is in each case in the possession of the operating personnel.
  • the prepared thread end is then threaded into the thread withdrawal tube 11 of the open-end spinning device 3.
  • the control device 9 is activated via the switching element 27, which finally ensures a proper sequence of the piecing process.
  • control device 9 initially initiates the individual drive 15 of the sliver-feed cylinder 14, so that a fiber ring is produced in conjunction with the sliver-opening roller 12 rotating at operating speed in the spinning rotor 4, which likewise rotates at operating speed. With a small, defined time delay, the control device 9 also controls the individual drive 19 of the thread withdrawal device 18 so that a targeted return of the thread prepared thread in the pneumatic thread storage device 37 held as a thread loop thread length takes place in the open-end spinning device 3 inside. That is, the prepared thread end is applied in the open-end spinning device 3 time and length accuracy of the rotating with the spinning rotor 4 fiber ring, which is thereby broken.
  • the thread withdrawal device 18 is then switched by the control device 9 on time in the forward direction and the newly emerging thread 30 withdrawn at a predetermined thread withdrawal speed from the open-end spinning device 3.
  • the cross-wound bobbin 22 is also lowered by the appropriate control of the device 7 to the rotating with operating speed bobbin drive roller 23 and accelerated by this.
  • the time required to accelerate a cheese to a predetermined operating speed depends mainly on the respective moment of inertia of the cheese, that is, on their respective cross-coil diameter.
  • the thread end is, as known, applied in the open-end spinning device 3 time and length to the rotating with the spinning rotor 4 fiber ring, which is thereby broken.
  • the thread withdrawal device 18 is then switched by the control device 9 on time in the forward direction and the newly emerging thread 30 is withdrawn from the open-end spinning device 3.
  • control device 9 also ensures that the cross-wound bobbin 22 is placed on the rotating with operating speed bobbin drive roller 23 and thereby accelerated successively to its operating speed.
  • the yarn transport speed at which the yarn draw-off device 18 pulls off the newly emerging yarn 30 from the open-end spinning device 3 is initially somewhat below the yarn transport speed with which the yarn draw-off device 18 operates during the spinning process. That is, the thread withdrawal device 18 initially pulls the thread 30 off in the course of the piecing process with a thread transport speed which is 1-3% below the thread transport speed provided during the spinning operation. In this way, it is possible to minimize the amount of thread which has to be temporarily stored in the yarn storage device 37 in the course of a piecing process, and which is partly responsible for the often less than optimal operating conditions at the work stations 2 during the piecing process.
  • the time span in which suboptimal operating states prevail at the workstation affected is minimized in a simple manner by minimizing the amount of thread inevitably cached during a piecing process, which has a very positive effect on the quality of the cheeses, in particular with respect to a winding tension which is as constant as possible. effect.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP14001709.6A 2013-06-14 2014-05-15 Procédé de fonctionnement d'un poste de travail d'un métier à filer à rotor à bout libre et poste de travail associé Withdrawn EP2813605A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013009998.6A DE102013009998A1 (de) 2013-06-14 2013-06-14 Verfahren zum Betreiben einer Arbeitsstelle einer Offenend-Rotorspinnmaschine sowie zugehörige Arbeitsstelle

Related Parent Applications (1)

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DE102013009998 Previously-Filed-Application 2013-06-14

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EP2813605A1 true EP2813605A1 (fr) 2014-12-17

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EP14001709.6A Withdrawn EP2813605A1 (fr) 2013-06-14 2014-05-15 Procédé de fonctionnement d'un poste de travail d'un métier à filer à rotor à bout libre et poste de travail associé

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EP (1) EP2813605A1 (fr)
CN (1) CN104233531A (fr)
DE (1) DE102013009998A1 (fr)
IN (1) IN2014MU01882A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114616367A (zh) * 2019-10-31 2022-06-10 卓郎纺织解决方案两合股份有限公司 自由端纺纱机和操作这种自由端纺纱机的方法和控制装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111971426A (zh) * 2018-02-10 2020-11-20 Dr.Mgr教育研究机构学院 用于纺制诸如椰壳纤维和香蕉的粗纤维和长纤维的带有纺纱箱模块的多主轴纱条进料纺纱机
CN109695076B (zh) * 2019-01-18 2020-11-24 安徽日发纺织机械有限公司 一种转杯纺基于引纱卷绕生头装置的节能启动方法
DE102020127007A1 (de) 2020-10-14 2022-04-14 Saurer Spinning Solutions Gmbh & Co. Kg Verfahren zum Betreiben einer Spinnmaschine und Spinnmaschine
IT202000025831A1 (it) * 2020-10-30 2022-04-30 Savio Macch Tessili Spa Stazione di filatura di una macchina di filatura a rotore con dispositivo di avvolgimento del filato migliorato, macchina di filatura a rotore e relativo metodo di filatura

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DE4309947A1 (de) 1993-03-26 1994-09-29 Schlafhorst & Co W Spinnstelle an einer Rotorspinnmaschine
DE19827605A1 (de) 1998-06-20 1999-12-23 Schlafhorst & Co W Verfahren und Vorrichtung zum Aufnehmen eines Fadenendes von der Oberfläche einer Kreuzspule
EP1283288A2 (fr) 2001-08-09 2003-02-12 W. SCHLAFHORST AG & CO. Procédé et dispositif de rattache pour un métier à filer à bout libre
DE102005036485A1 (de) 2005-08-03 2007-02-08 Saurer Gmbh & Co. Kg Offenend-Rotorspinnmaschine
DE102007043417A1 (de) * 2007-09-12 2009-03-19 Rieter Ingolstadt Gmbh Offenend-Spinnmaschine
DE10062096B4 (de) 1999-12-29 2012-06-14 Rieter Ingolstadt Gmbh Spinnmaschine mit mehrere Einzelantriebe aufweisenden Spinnstellen

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JPS50100322A (fr) * 1974-01-14 1975-08-08
CH587935A5 (fr) * 1974-11-15 1977-05-13 Rieter Ag Maschf
DE3814966A1 (de) * 1988-05-03 1989-11-16 Schubert & Salzer Maschinen Verfahren und vorrichtung zum anspinnen einer offenend-spinnvorrichtung
DE102008000239A1 (de) * 2008-02-05 2009-08-06 Rieter Ingolstadt Gmbh Spinnmaschine mit einer Vielzahl von Spinnstellen

Patent Citations (6)

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Publication number Priority date Publication date Assignee Title
DE4309947A1 (de) 1993-03-26 1994-09-29 Schlafhorst & Co W Spinnstelle an einer Rotorspinnmaschine
DE19827605A1 (de) 1998-06-20 1999-12-23 Schlafhorst & Co W Verfahren und Vorrichtung zum Aufnehmen eines Fadenendes von der Oberfläche einer Kreuzspule
DE10062096B4 (de) 1999-12-29 2012-06-14 Rieter Ingolstadt Gmbh Spinnmaschine mit mehrere Einzelantriebe aufweisenden Spinnstellen
EP1283288A2 (fr) 2001-08-09 2003-02-12 W. SCHLAFHORST AG & CO. Procédé et dispositif de rattache pour un métier à filer à bout libre
DE102005036485A1 (de) 2005-08-03 2007-02-08 Saurer Gmbh & Co. Kg Offenend-Rotorspinnmaschine
DE102007043417A1 (de) * 2007-09-12 2009-03-19 Rieter Ingolstadt Gmbh Offenend-Spinnmaschine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114616367A (zh) * 2019-10-31 2022-06-10 卓郎纺织解决方案两合股份有限公司 自由端纺纱机和操作这种自由端纺纱机的方法和控制装置
CN114616367B (zh) * 2019-10-31 2023-08-18 卓郎纺织解决方案两合股份有限公司 自由端纺纱机和操作这种自由端纺纱机的方法和控制装置

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IN2014MU01882A (fr) 2015-09-04
DE102013009998A1 (de) 2014-12-18
CN104233531A (zh) 2014-12-24

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