(19)
(11)EP 3 075 889 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
27.05.2020 Bulletin 2020/22

(21)Application number: 16162784.9

(22)Date of filing:  30.03.2016
(51)International Patent Classification (IPC): 
D01H 4/48(2006.01)
D01H 15/00(2006.01)

(54)

METHOD AND A SPINNING MACHINE FOR REMOVING THE FAULTY YARN PORTION FROM A WORK STATION OF A SPINNING MACHINE

VERFAHREN UND SPINNMASCHINE ZUM ENTFERNEN EINES DEFEKTEN FADENABSCHNITTS VON DER SPINNSTELLE EINER SPINNMASCHINE

MÉTHODE ET MÉTIER À FILER POUR ÉVACUER UNE PORTION DÉFECTUEUSE DE FIL D'UNE POSITION DE FILAGE D'UN MÉTIER À FILER


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 03.04.2015 CZ 20150232

(43)Date of publication of application:
05.10.2016 Bulletin 2016/40

(73)Proprietor: Rieter CZ s.r.o.
562 01 Ústí nad Orlicí (CZ)

(72)Inventors:
  • Stancl, Jiri
    562 06 Usti nad Orlici (CZ)
  • Skrivanek, Vladimir
    562 06 Usti nad Orlici (CZ)
  • Hajek, Ladislav
    561 12 Brandys nad Orlici (CZ)

(74)Representative: Musil, Dobroslav 

Zabrdovicka 801/11 615 00 Brno
Zabrdovicka 801/11 615 00 Brno (CZ)


(56)References cited: : 
EP-A1- 2 530 193
EP-A2- 2 573 228
EP-A1- 2 801 646
DE-A1-102007 053 467
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    Technical field



    [0001] A method for removing the faulty yarn portion from a work station of a spinning machine after the work station is stopped in a controlled manner, especially after a defect of the spun yarn is detected by a sensor of the quality of yarn.

    [0002] A device for performing the method at a work station of a spinning machine, whereby each work station of the spinning machine comprises a suction nozzle for sucking the faulty yarn portion after the work station is stopped in a controlled manner.

    Background art



    [0003] The production of the spun yarn takes place on spinning machines comprising a plurality of work stations arranged in several substantially parallel rows. During the operation of the spinning machine it is impossible to rule out the possibility that a smaller or greater yarn portion containing defects is spun out. If these defects are visible or if they negatively affect the mechanical properties of yarn, which are essential in the process of further application of yarn, it is necessary to ensure that the defective yarn portion will not get onto the final wound bobbin of the spun yarn. It is therefore necessary to cut out the faulty yarn portion and join the remaining ends of the high-quality yarn. Such joints represent also a local change in yarn diameter, which entails making a compromise so that the new joint will not represent a greater fault of yarn than the fault detected by the sensor.

    [0004] The operation of a modern spinning machine or the steps carried out by the operator to meet the requirements for yarn quality are known. A spinning machine is at each work station provided with a sensor of yarn quality, the so-called yarn clearer, which monitors the running spun yarn, which means its diameter and its changes, changes of the colour or structure of the yarn, etc. Current sensors of yarn quality are due to high sensitivity able to respond even to minor changes which, however, may occur even on yarn portions of a greater length which have to be removed.

    [0005] If a change of yarn is detected at a work station of the spinning machine, which is a signal of a possible defect, the process of recording the yarn length is automatically started. If after a certain predetermined period of time the criterion of cleaning the yarn is not exceeded, recording the yarn length is terminated without further intervention. On the other hand, if within this period of time the criterion for cleaning the yarn is exceeded, spinning is automatically terminated at this work station and the total length of the yarn spun between the time of detecting a possible defect and the time when the spinning operation is terminated.

    [0006] A suction nozzle of a work station is connected to a vacuum system of a spinning machine, whereupon the entire length of the faulty yarn is unwound from the final bobbin, being sucked into the vacuum system of a spinning machine and being deposited in a respective space allotted for waste, whereupon the operator finishes the preparation of yarn for a new spinning-in operation.

    [0007] The vacuum system of a spinning machine is used to suck in the yarn ends after cutting out the faulty yarn portion or after a yarn breakage, to unwind this portion of the already spun yarn from the final bobbin and to suck it off, or to join the ends of the high-quality yarn by a pneumatic splicer.

    [0008] Taking into account a great plurality of work stations of a spinning machine, high requirements for uniformity of the spun yarn and the frequent use of the vacuum system for suction of a relatively great length of the faulty yarn, there is a high probability of the necessity of sucking off the faulty yarn simultaneously. Solving this problem by increasing the rated power input of the vacuum source is for such high numbers of of work stations of a spinning machine is uneconomical.

    [0009] Document EP 2573228 discloses a spinning machine (open-end or pneumatic-vortex one), which comprises vacuum draw-off channel, to which known yarn draw-off tube is connected. The draw-off tube is connected to a suction device of the spinning machine either directly, or, in the case of a pneumatic spinning machine, through a switch arranged between the draw-off tube and the suction device, which enables to connect to the suction device optionally the draw-off tube or feeding and drafting mechanism for drawn sliver. This switch is only a regulating means, but it is not able to solve the given technical problem.

    [0010] Document DE 102007053467 concerns an open-end spinning machine. It solves the possibility of changing of the quantity of sucked air by combination of a main source of vacuum with a secondary source of vacuum, which can be, in the case of higher demand for air being sucked, connected to the main source. The main vacuum source is connected to a main vacuum channel of the spinning machine, to which are through stop valves connected individual suction nozzles of temporary vacuum receiver of yarn, or unwinding the faulty yarn portion of individual work stations, and individual vacuum chambers of spinning rotors of spinning units of individual work stations. The secondary source of vacuum is connected to another central vacuum channel, to which other suction nozzles of work stations are connected. The vacuum system of the spinning machine thus comprises two essentially separate sections, each with its own source of vacuum, which significantly increase the cost of the spinning machine as well as the costs of its operation.

    [0011] Document EP 2801646A relates to a rotor spinning machine and solves the drawback of permanent connection of the rotor and the rotor chamber to a vacuum system of the spinning machine, which is energetically unfavorable and limits the number of work stations, which can be simultaneously spun-in. The solution to this drawback rests in that work stations can be disconnected from the central vacuum system, while to the vacuum system only work stations which are currently spinning-in or spinning are connected at a time. Spinning-in operation is from the point of view of the need for vacuum more demanding than spinning. The total vacuum of the machine is controlled depending on the number of work stations connected to the vacuum system, but the vacuum system must enable simultaneous spinning-in of an unusually high number of work stations.

    [0012] The above mentioned drawback is not solved by the background art, or it is addressed by uneconomical means. The aim of the invention is therefore to overcome this drawback without increasing the performance of the vacuum source.

    Principle of the invention



    [0013] The goal of the invention is achieved by a method according to claim 1.

    [0014] The advantage is the fact that there cannot be such a decrease in vacuum which would lead to insufficiently efficient suction of yarn.

    [0015] The aim of the invention is also achieved by a spinning machine according to claim 2.

    Description of drawings



    [0016] An exemplary embodiment of a device according to the invention is shown in Fig. 1, which schematically represents an arrangement of the connection of a work station of a spinning machine to the central vacuum channel of the vacuum system of a spinning machine.

    Specific description



    [0017] A known work station of a spinning machine comprises a spinning unit, from which the spun yarn is withdrawn by a drawing-off mechanism. A sensor 1 of the quality of yarn is situated in front of the drawing-off mechanism and a sensor of the presence of yarn is situated behind the drawing-off mechanism. The yarn is wound by a winding device onto a final bobbin. The work station comprises a suction nozzle 2 connected to the central vacuum channel 3 of the vacuum system of a spinning machine by means of a stop valve 4.

    [0018] The stop valves 4 are connected to the control unit 5, to which is also permanently connected the outlet of a vacuum meter 6 arranged in the central vacuum channel 3 of the vacuum system of a spinning machine. A control unit 5 may be a control unit of a work station, or a control unit of a respective portion of a spinning machine, or, optionally, it may be the central control unit of a spinning machine.

    [0019] The performance of the vacuum system of a spinning machine is limited by a number of all the work stations simultaneously connected to the central vacuum channel 3 of the vacuum system of a spinning machine. Each work station of the spinning machine is adapted to perform the piecing operation in a self-sufficient manner, or two or more not shown servicing vehicles are used to perform the piecing operations at work stations.

    [0020] The instantaneous value of vacuum needed for sucking off the defective yarn at one work station of the spinning machine is known and is stored in the memory of the control unit 5 of the spinning machine.

    [0021] The minimum value of vacuum needed for unwinding the faulty yarn portion from the final bobbin and sucking it off out of the work station and thus the requirement for the capacity of the vacuum source is defined. An insufficient level of the vacuum would result in an incorrect operation of the device.

    [0022] After detecting a defect of the spun yarn by a sensor 1 of quality and after passing the particular signal to the control unit 5, the control unit 5 stops the particular work station in a controlled manner. This activity includes unwinding the spun faulty yarn portion at the particular work station of the spinning machine. The control unit 5 finds out the current value of the vacuum in the central vacuum channel 3 of the vacuum system of the spinning machine sensed by the vacuum meter 6 and evaluates it as the remaining capacity of the unillustrated vacuum source.

    [0023] If this remaining capacity is sufficient unwinding the faulty yarn portion from the final bobbin and sucking it off out of the particular work station, the signal of the control unit 5 opens the stop valve 4 of the particular work station, whereupon suction of the faulty yarn portion by the suction nozzle 2 is started, as well as its removal to the unillustrated waste space.

    [0024] If the remaining capacity is insufficient for reliable unwinding the faulty yarn portion from the final bobbin and sucking it off out of the particular work station, the control unit 5 does not give a signal to open the stop valve 4 at the particular work station and waits until the process of unwinding and sucking off the faulty yarn portion at any of the currently simultaneously attended work stations is terminated. It is only after terminating the operation at any of the currently simultaneously attended work stations and after detecting new data relating to remaining capacity of the vacuum source and evaluating the current capacity of the vacuum source, that the control unit 5 sends a signal to the particular, awaiting, work station. Upon this signal the stop valve 4 opens, the suction nozzle 2 is connected to the central vacuum channel 3 of the vacuum system of a spinning machine, by which means the operation of sucking off and unwinding the faulty yarn portion is started.

    [0025] The advantage of the method and spinning machine according to the invention is performing properly the operation of sucking off the defective portion of the spun yarn and removing it out of the work station of a spinning machine without having to use a high-performance vacuum source. The loss caused by the downtime of the work station waiting for the necessary vacuum in the central vacuum channel 3 is usually lower than the acquisition and operating costs which would be required by a more powerful source of vacuum.

    List of references



    [0026] 
    1
    sensor of yarn quality
    2
    suction nozzle (of a work station or attending device)
    3
    central vacuum channel of a vacuum system of a spinning machine
    4
    stop valve of vacuum at a work station
    5
    control unit of a spinning machine
    6
    vacuum meter in the central vacuum channel of the vacuum system of a spinning machine



    Claims

    1. A method for removing the faulty yarn portion after a cutting out of that faulty yarn portion or after a yarn breakage, at a work station of a spinning machine, the spinning machine comprising a plurality of work stations, a control unit (5), a vacuum source, a central vacuum channel (3) and a vacuum meter (6) arranged in the central vacuum channel (3), whereby after a defect of the spun yarn is detected by a sensor (1) of yarn quality at a particular work station, the control unit (5) stops the particular work station in a controlled manner, wherein this includes unwinding the spun faulty yarn portion from a final bobbin by sucking it into the vacuum system of the spinning machine through a suction nozzle (2) of the particular work station, wherein the suction nozzle (2) is connected to the central channel (3) by means of a stop valve (4), which is coupled to the control unit (5) characterized in that the control unit (5) finds out the current value of the vacuum in the central vacuum channel (3) of the vacuum system of the spinning machine, the current value being sensed by the vacuum meter (6) and evaluates it as the remaining capacity of the vacuum source, whereby if the control unit (5) evaluates the remaining capacity as sufficient for reliable unwinding the faulty yarn portion from the final bobbin and sucking it off out of the given work station, the signal of the control unit (5) opens the stop valve (4) of the particular work station, whereupon sucking off of the faulty yarn portion by the suction nozzle (2) is started, as well as its removal to a waste space, and if the control unit (5) evaluates the remaining capacity as insufficient for reliable unwinding the faulty yarn portion from the final bobbin and sucking it off out of the particular work station, the control unit (5) waits, and sends the signal to open the stop valve (4) of the particular work station only after the process of unwinding and sucking off the faulty yarn portion at any of the currently simultaneously attended work stations of the spinning machine is terminated and the control unit (5) detects new data relating to remaining capacity of the vacuum source and evaluates the current capacity of the vacuum source as sufficient for reliable unwinding the faulty yarn portion from the final bobbin and sucking it off out of the particular work station.
     
    2. A spinning machine, comprising a plurality of work stations, configured for carrying out the method according to Claim 1 at its work stations, whereby the spinning machine comprises a control unit (5), a vacuum source, a central vacuum channel (3) and a vacuum meter (6) arranged in the central vacuum channel (3) whereby each work station of the spinning machine comprises a sensor (1) of yarn quality and a suction nozzle (2) for sucking off the faulty yarn portion after the work station is stopped in a controlled manner, the suction nozzle (2) being connected to the central vacuum channel (3) of the vacuum system of the spinning machine, wherein each suction nozzle (2) for sucking off the faulty yarn portion is connected to the central vacuum channel (3) of the vacuum system of the spinning machine by means of a stop valve (4), which is coupled to the control unit (5), characterized in that the control unit (5) is further connected to the vacuum meter (6), whereby the control unit (5) is adapted to find out the current value of the vacuum in the central vacuum channel (3) of the vacuum system of the spinning machine sensed by the vacuum meter (6) and evaluate it as the remaining capacity of the vacuum source, and is configured to open the stop valve (4) of a particular work station, at which a defect of the spun yarn has been detected by the sensor (1) of yarn quality, to start sucking off of the faulty yarn portion by the suction nozzle (2), as well as its removal to the waste space by a signal, if it evaluates this remaining capacity as sufficient for reliable unwinding the faulty yarn portion from the final bobbin and sucking it off out of the particular work station, and at the same time configured to wait, and send a signal to open the stop valve (4) of the particular work station, if it evaluates current capacity of the vacuum source as insufficient for reliable unwinding the faulty yarn portion from the final bobbin and sucking it off out of the particular work station, only after the process of unwinding and sucking off the faulty yarn portion at any of the currently simultaneously attended work stations is terminated and the control unit (5) detects new data relating to remaining capacity of the vacuum source and evaluates the current capacity of the vacuum source as sufficient for reliable unwinding the faulty yarn portion from the final bobbin and sucking it off out of the particular work station.
     
    3. The device according to Claim 2, characterized in that the control unit (5) is a control unit of a work station of the spinning machine.
     
    4. The device according to Claim 2, characterized in that the control unit (5) is a control unit of a spinning machine portion.
     
    5. The device according to Claim 2, characterized in that the control unit (5) is a control unit of the spinning machine.
     


    Ansprüche

    1. Verfahren zur Beseitigung eines mangelhaften Garnabschnittes nach einem Ausschneiden des mangelhaften Garnabschnittes oder nach einem Garnbruch auf einer Arbeitsstelle einer Spinnmaschine, wobei die Spinnmaschine eine Vielzahl der Arbeitsstellen, Steuereinheit (5), Unterdruckquelle, Zentralunterdruckkanal (3) und Unterdruckmessgerät (6) aufweist, das in dem Zentralunterdruckkanal (3) angeordnet ist, wobei nach der Ermittlung des jeweiligen Mangels des ersponnenen Garns durch einen Garnqualitätsfühler (1) auf der jeweiligen Arbeitsstelle die Steuereinheit (5) eine gesteuerte Einstellung von dieser Arbeitsstelle durchführt, was eine Abwicklung des ersponnenen mangelhaften Garnabschnittes von der finalen Spule durch sein Ansaugen ins Vakuumsystem der Spinnmaschine mittels einer Absaugdüse der jeweiligen Arbeitsstelle einschließt, wobei die Absaugdüse mittels eines Absperrventils (4), das mit der Steuereinheit (5) verkoppelt ist, an den Zentralunterdruckkanal (3) angeschlossen ist, dadurch gekennzeichnet, dass die Steuereinheit (5) den aktuellen Wert des Unterdruckes in dem Zentralunterdruckkanal (3) des Unterdrucksystems der Spinnmaschine ermittelt, der durch ein Unterdruckmessgerät (6) abgetastet wird, und diese ihn als eine restliche Kapazität der Unterdruckquelle auswertet, wobei wenn die Steuereinheit (5) die restliche Kapazität zum zuverlässigen Abwickeln des mangelhaften Garnabschnittes von der finalen Spule und zu seinem Absaugen von der jeweiligen Arbeitsstelle als ausreichend auswertet, öffnet das Signal der Steuereinheit (5) das Absperrventil (4) der jeweiligen Arbeitsstelle, wonach das Absaugen des mangelhaften Garnabschnittes durch die Absaugdüse (2) und seine Abführung in einen nicht dargestellten Abfallraum eingeleitet werden, und wenn die Steuereinheit (5) die restliche Kapazität zum zuverlässigen Abwickeln des mangelhaften Garnabschnittes von der finalen Spule und zu seinem Absaugen von der jeweiligen Arbeitsstelle als nicht ausreichend auswertet, wartet sie dann ab und erteilt das Signal zum Öffnen des Absperrventils (4) der jeweiligen Arbeitsstelle erst nach dem Ende der Abwicklung und der Absaugung des mangelhaften Garnabschnittes an einer der aktuell gleichzeitig zu bedienenden Arbeitsstellen der Spinnmaschine, wann die Steuereinheit (5) die aktuelle Kapazität der Unterdruckquelle neu ermittelt und diese zum zuverlässigen Abwickeln des mangelhaften Garnabschnittes von der finalen Spule und zu seinem Absaugen von der jeweiligen Arbeitsstelle als ausreichend auswertet.
     
    2. Spinnmaschine, die eine Vielzahl der Arbeitsstellen aufweist, die zur Durchführung des Verfahrens nach dem Anspruch 1 auf diesen Arbeitsstellen angepasst ist, wobei diese Spinnmaschine Steuereinheit (5), Unterdruckquelle, Zentralunterdruckkanal (3) und Unterdruckmessgerät (6) aufweist, das in dem Zentralunterdruckkanal (3) angeordnet ist, wobei jede Arbeitsstelle der Spinnmaschine einen Garnqualitätsfühler (1) und eine Absaugdüse (2) zum Absaugen des mangelhaften Garnabschnittes nach einer gesteuerten Einstellung von dieser Arbeitsstelle aufweist, wobei die Absaugdüse (2) an den Zentralunterdruckkanal (3) des Unterdrucksystems der Spinnmaschine angeschlossen ist, wobei jede Absaugdüse (2) zum Absaugen des mangelhaften Garnabschnittes an den Zentralunterdruckkanal (3) des Unterdrucksystems der Spinnmaschine mittels eines Absperrventils (4) angeschlossen ist, das mit der Steuereinheit (5) verkoppelt ist, dadurch gekennzeichnet, dass die Steuereinheit (5) ferner mit einem Unterdruckmessgerät (6) verkoppelt ist, wobei diese Steuereinheit (5) zur Ermittlung des aktuellen Unterdruckwertes in dem Zentralunterdruckkanal (3) des Unterdrucksystems der Spinnmaschine, der durch ein Unterdruckmessgerät (6) abgetastet wird, und zu seiner Auswertung als einer restlichen Kapazität der Unterdruckquelle und mittels des Signals zum Öffnen des Absperrventils (4) der jeweiligen Arbeitsstelle, auf der durch den Garnqualitätsfühler (1) ein Fehler des ersponnenen Garns ermittelt wurde, zur Einleitung des Absaugens des mangelhaften Garnabschnittes durch eine Absaugdüse (2) und seiner Abführung in einen nicht dargestellten Abfallraum konfiguriert ist, wenn diese restliche Kapazität zum zuverlässigen Abwickeln des mangelhaften Garnabschnittes von der finalen Spule und zu seinem Absaugen von der jeweiligen Arbeitsstelle als ausreichend auswertet, und gleichzeitig, wenn sie die aktuelle Kapazität zum zuverlässigen Abwickeln des mangelhaften Garnabschnittes von der finalen Spule und zu seinem Absaugen von der jeweiligen Arbeitsstelle als nicht ausreichend auswertet, zum Abwarten und zur Erteilung des Signals zum Öffnen des Absperrventils (4) der jeweiligen Arbeitsstelle erst nach dem Ende der Abwicklung und Absaugung des mangelhaften Garnabschnittes an einer der aktuell gleichzeitig zu bedienenden Arbeitsstellen der Spinnmaschine konfiguriert ist, wann die Steuereinheit (5) die neuen Daten ermittelt, die die restliche Kapazität der Unterdruckquelle betreffen, und die restliche Kapazität der Unterdruckquelle zum zuverlässigen Abwickeln des mangelhaften Garnabschnittes von der finalen Spule und zu seinem Absaugen von der jeweiligen Arbeitsstelle als ausreichend auswertet.
     
    3. Einrichtung nach dem Anspruch 2, dadurch gekennzeichnet, dass die Steuereinheit (5) eine Steuereinheit der Arbeitsstelle der Maschine ist.
     
    4. Einrichtung nach dem Anspruch 2, dadurch gekennzeichnet, dass die Steuereinheit (5) eine Steuereinheit einer Maschinensektion ist.
     
    5. Einrichtung nach dem Anspruch 2, dadurch gekennzeichnet, dass die Steuereinheit (5) eine Steuereinheit der Maschine ist.
     


    Revendications

    1. Procédé pour enlever la section de fil défectueuse après avoir coupé la section de fil défectueuse ou après la rupture du fil au poste de travail de la machine à filer, et cette machine à filer comprend une pluralité des postes de travail, une unité de commande (5), une source du vide, un canal de vide central (3) et un vacuomètre (6) disposé dans le canal de vide central (3), tandis qu' après avoir détecté le défaut du fil filé par le capteur (1) de la qualité du fil à un poste de travail particulier, l'unité de commande (5) effectue un arrêt contrôlé de ce poste de travail, ce qui comprend le déroulement de la section filée défectueuse du fil de la bobine finale par son aspiration dans le système de vide de la machine à filer par l'intermédiaire de la tuyère d'aspiration du poste respectif de travail, tandis que la tuyère d'aspiration est reliée par l'intermédiaire de la soupape d'arrêt (4), qui est connecté à l'unité de commande (5), au canal central de vide (3), caractérisé en ce que l'unité de commande (5) détecte la valeur du vide réelle dans le canal de vide central (3) du système de vide de la machine à filer détectée par le vacuomètre (6) et elle l'évalue comme la capacité restante de la source du vide, tandis que si l'unité de commande (5) évalue la capacité restante comme suffisante pour dérouler de manière fiable la section défectueuse du fil de la bobine finale et pour son aspiration du poste de travail, le signal de l'unité de commande (5) ouvre la soupape d'arrêt (4) du poste respectif de travail, après cela on commence l'aspiration de la section de fil défectueuse par la tuyère d'aspiration (2) et son évacuation dans l'espace d'écoulement non représenté, et si l'unité de commande (5) évalue la capacité restante comme insuffisante pour dérouler de manière fiable la section de fil défectueuse de la bobine finale et son aspiration du poste de travail, ainsi il attend et il donne le signale de l'ouverture de la soupape d'arrêt (4) du poste de travail respectif uniquement après que le déroulement et l'aspiration de la section de fil défectueuse sur l'un des postes de travail servis actuellement simultanément de la machine à filer sont terminés, quand l'unité de commande (5) détermine à nouveau la capacité réelle de la source du vide et elle l'évalue comme suffisante pour dérouler de manière fiable la section de fil défectueuse de la bobine finale et son aspiration du poste de travail.
     
    2. Machine à filer comprenant une pluralité de postes de travail adaptés pour exécuter le procédé selon la revendication 1 sur ces postes de travail, tandis que cette machine à filer comprend une unité de commande (5), une source du vide, un canal de vide central (3) et un vacuomètre (6) disposé dans le canal de vide central (3), tandis que chaque poste de travail de la machine à filer comprend un capteur (1) de qualité du fil et une tuyère d'aspiration (2) pour aspirer la section de fil défectueuse après un arrêt contrôlé de ce poste de travail, tandis que la tuyère d'aspiration (2) est reliée au canal central (3) du système de vide de la machine à filer, tandis que chaque tuyère d'aspiration (2) pour aspirer la section de fil défectueuse est reliée au canal central (3) du système de vide de la machine à filer par l'intermédiaire de la soupape d'arrêt (4) qui est couplée à l'unité de commande (5), caractérisé en ce que l'unité de commande (5) est en outre connectée à un vacuomètre (6), tandis que cette unité de commande (5) est configurée pour détecter la valeur de vide actuelle dans le canal de vide central (3) du système de vide de la machine à filer détectée par le vacuomètre (6) et pour l'évaluer comme la capacité restante de la source du vide et par l'intermédiaire du signal pour ouvrir la soupape d'arrêt (4) du poste de travail respectif, sur lequel le capteur (1) de qualité du fil a détecté un défaut dans le fil filé, pour commencer à aspirer la section de fil défectueuse à travers la tuyère d'aspiration (2) et à la décharger dans l'espace d'écoulement non représenté, si elle évalue cette capacité restante comme suffisante pour dérouler de manière fiable la section de fil défectueuse de la bobine finale et son aspiration du poste de travail, et en même temps configuré, s'il évalue la capacité actuelle comme insuffisante pour dérouler de manière fiable la section de fil défectueuse de la bobine finale et son aspiration du poste de travail, pour attendre et pour donner le signal d'ouvrir la soupape d'arrêt (4) du poste de travail uniquement après que le déroulement et l'aspiration de la section de fil défectueuse sont terminés à l'un des postes de travail en même temps actuellement servi de la machine à filer, quand l'unité de commande (5) détecte de nouvelles données concernant la capacité restante de la source de vide et elle évalue la capacité restante de la source du vide comme suffisante pour dérouler de manière fiable la section de fil défectueuse de la bobine finale et pour son aspiration du poste de travail.
     
    3. Dispositif selon la revendication 2, caractérisé en ce que l'unité de commande (5) est l'unité de commande du poste de travail de la machine.
     
    4. Dispositif selon la revendication 2, caractérisé en ce que l'unité de commande (5) est une unité de commande de la section de la machine.
     
    5. Dispositif selon la revendication 2, caractérisé en ce que l'unité de commande (5) est une unité de commande de la machine.
     




    Drawing








    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description