EP1028080B1 - Method for operating a workstation in a textilmachine for making cross wound bobbins - Google Patents

Method for operating a workstation in a textilmachine for making cross wound bobbins Download PDF

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Publication number
EP1028080B1
EP1028080B1 EP00100170A EP00100170A EP1028080B1 EP 1028080 B1 EP1028080 B1 EP 1028080B1 EP 00100170 A EP00100170 A EP 00100170A EP 00100170 A EP00100170 A EP 00100170A EP 1028080 B1 EP1028080 B1 EP 1028080B1
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EP
European Patent Office
Prior art keywords
thread
contact pressure
apd
winding
working station
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.)
Expired - Lifetime
Application number
EP00100170A
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German (de)
French (fr)
Other versions
EP1028080A2 (en
EP1028080A3 (en
Inventor
Rolf Haasen
Hans-Günter Wedershoven
Bernd-Rüdiger Theele
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
Original Assignee
Saurer GmbH and Co KG
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Publication date
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Publication of EP1028080A2 publication Critical patent/EP1028080A2/en
Publication of EP1028080A3 publication Critical patent/EP1028080A3/en
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Publication of EP1028080B1 publication Critical patent/EP1028080B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/20—Co-operating surfaces mounted for relative movement
    • B65H59/22—Co-operating surfaces mounted for relative movement and arranged to apply pressure to material
    • B65H59/24—Surfaces movable automatically to compensate for variation in tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material
    • B65H63/024—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials
    • B65H63/036—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the combination of the detecting or sensing elements with other devices, e.g. stopping devices for material advancing or winding mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H69/00—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a method for operating a Work station of a textile machine producing cross-wound bobbins with the features mentioned in the preamble of claim 1.
  • Such cross-wound bobbins are textile machines known for example from DE 196 50 932 A1.
  • Such so-called cross-winder machines have one Large number of work stations designed as winding units, which is usually in the longitudinal direction of the winding machine are arranged side by side. For control and monitoring each winding unit is a separate one Assigned to job computer.
  • the single ones Workstation computers are also via a machine bus connected to a central control unit of the winding machine.
  • Such winding machines have a service unit that automatically supplies the workstations in the form of a so-called cross-wound bobbin changer.
  • the cross-wound bobbin handover delivers finished winding bobbins from the bobbin frame of the work station to a machine-long transport device which conveys the cross-wound bobbins to a transfer station arranged on the machine end.
  • the service unit then changes a new empty tube into the coil frame of the job in question.
  • the current one is known from DE 41 29 803 A1 Thread tension of the running thread with one Detect thread tension sensor.
  • Thread tension sensor performed thread tension measurement on running thread becomes a control signal for the thread tensioner provided that one more according to the control signal or less braking effect on the running thread exercises.
  • the thread tensioner has one with a variable pressure force can be applied to the thread brake device.
  • Such a thread tensioner is for example from the DE 41 30 301 A1 known.
  • Thread tension sensor In the thread tension sensor known from DE 41 29 803 A1 the thread is guided over a thread guiding element a head end arranged in a magnetic field Plunger is attached.
  • a Thread tension sensor can use a moving coil current to hold the Position of the moving coil as a direct variable for the Thread tension can be taken as a proportional Dependency between the thread tension and the There is a moving coil current. By evaluating the The coil current can thus be the course of the Monitor thread tension.
  • the invention is therefore based on the object of a method of the generic type with which a high Winding quality of the package can be ensured.
  • the contact pressure of a thread braking device of the thread tensioner acting on the thread is predetermined by the workstation computer and is constantly compared with a predetermined contact pressure limit value, it can be determined immediately when the current contact pressure has reached or exceeded the predetermined limit value and for a predeterminable period of time , In this way, it is reliably ensured that each reaching or exceeding the limit value over a predetermined period of time, which may be caused, for example, by faulty thread guidance, is detected immediately, and appropriate countermeasures can be initiated. This advantageously avoids that a package is too soft and thus incorrectly wound by a faulty thread. Overall, this increases the effectiveness of the winding machine, since corrective action can be taken immediately by early detection of a problem. Furthermore, the method according to the invention ensures that all of the winding packages produced have an essentially constant, high package quality, in particular are wound up with a constant, defined thread tension.
  • the contact pressure of the thread brake device is monitored during a run-up of the bobbin after a splicing process in which the upper thread and the lower thread have been searched and automatically connected.
  • the monitoring of the contact pressure of the Thread brake device also during the regular Winding process is carried out. So here too, if the thread with a winding speed of up to 2,000 m / min runs, by monitoring the contact pressure of the Thread brake device proper guidance of the thread and thus a defined thread tension is ensured become. This also takes place when the contact pressure for one Predeterminable period of time reaches a predetermined limit a controlled thread cut. An interference signal is then generated, the one necessary inspection and / or repair of the concerned Indicates job.
  • Figure 1 shows a side view of a designated 10 Bobbin of a textile machine producing cross-wound bobbins 1.
  • Such textile machines known as automatic winder machines have a large number of juxtaposed Spooling stations (work stations) 10, on which payout spools 12 (hereinafter also called spinning bobbins) too large Package 14 (hereinafter also referred to as cheese) be rewound.
  • the spinning heads 12 pass over here a transport device 16 to the individual winding units 10.
  • the transport device 16 comprises, as is known per se, a Plenty, not specified in detail Transport routes on which, on transport plates 20 attached, spinning heads 12 or empty tubes 18 conveyed become.
  • a thread 22 is drawn off.
  • the one withdrawn from the spinning cop 12 Thread 22 passes on its way to the package 14 in Thread running direction 24 first a lower thread sensor 28, the via a signal line 30 with a workstation computer 32 connected is.
  • this lower thread sensor 28 for example, after a thread break or a controlled thread cut Initiation of the upper thread search, determined whether at all Bobbin thread 34 is present.
  • a thread tensioner 36 is located above the lower thread sensor 28 arranged.
  • the thread tensioner 36 comprises, as in FIG. 2 is indicated, two brake actuators 114, 116, which on the Apply a contact pressure APD to the running thread 22.
  • the Thread tensioner 36 is used for this purpose Workstation computer 32 defined via a control line 38 driven.
  • Thread end connection device 40 for example as pneumatic splicer is arranged.
  • the Splice device 40 is also via a signal line 42 connected to the workstation computer 32.
  • the course of the thread path is to determine Yarn defects a thread cleaner 44 is arranged.
  • the signals of the thread cleaner 44 are for evaluation via a signal line 48 Job computer 32 supplied.
  • a Yarn error is from the job computer 32 via a Control line 50 actuates a cutting device 52 and the Thread 22 separated.
  • the thread tension sensor 54 is a Signal line 56 also with the workstation computer 32 connected.
  • the thread tension of the thread 22 is monitored by the yarn tension sensor 54 continuously and according to the supplied by the yarn tension sensor 54 yarn tension signal Fsp is controlled via the work station computer 32 of the yarn tensioner 36th That is, the brake plate 114, 116 of the yarn tensioner 36 urging the thread 22 with a contact pressure APD is, which ensures that the running thread 22 has a substantially constant tensile yarn force Fsp is set, which ensures a uniform packing density of the zufertigenden cheese fourteenth
  • the paraffinizing device 46 follows in the thread running direction 24 finally a thread guide 58 over which the thread 22 opens a winding drum 60, a so-called grooved drum, runs on, the for a crosswise laying of the thread 22 after the Type of winding "wild winding" ensures.
  • the cheese 14 is via a sleeve, not shown, in a pivotable mounted coil frame 64 rotatably supported and lies with its outer circumference on the single motor driven Spool drum 60, which the cheese 14 via friction entraining.
  • the winding unit 10 also has a suction nozzle 66 and a Gripper tube 68.
  • the gripper tube 68 is used for gripping of the lower thread 34 originating from the spinning cop 12, which at a controlled thread cleaning cut or at a Thread break above the thread tensioner usually in the Thread tensioner 36 is held. That about an axis of rotation 72 pivotable gripper tube 68 is at a central Vacuum supply 76 connected to the winding machine 1, the communicates with a vacuum source 78.
  • the Gripper tube mouth moves along the dashed line marked trajectory 74.
  • the pivoting of the Gripper tube 68 is carried out by the workstation computer 32 controlled, via a known and therefore not closer shown drive device.
  • the suction nozzle 66 serves to receive one on the cheese 14 accumulated upper thread 80.
  • the suction nozzle 66 is an axis of rotation 82 can be pivoted such that its mouth 84 traverses a trajectory 86.
  • the suction nozzle 66 is also connected to the vacuum supply 76.
  • the Swiveling movement of the suction nozzle 66 is over the Job computer 32 by controlling one per se known drive device, not shown, preferably a cam disk package.
  • the winding unit 10 includes other mechanical, electrical and pneumatic components under the present Description should not be explained in more detail.
  • the workstation computer 32 and its connection with the thread tensioner 36, the Thread tension sensor 54 and thread cutting device 52 shown.
  • Thread tensioner 36 is known per se and for example in the DE 195 26 901 A1 described in detail.
  • thread tension sensor 54 Device for use, as for example by the DE 41 29 803 A1 is also known.
  • An electrically controllable thread cutting device like the one below is indicated by the reference number 52, is in Textile engineering for a long time state of the art.
  • Such Facilities usually have one by one Electromagnet selectively extendable cutting edge, which at Power supply to the electromagnet pressed against a stop the thread passing in front of the cutting edge reliably severed.
  • the workstation computer 32 which in the exemplary embodiment a thread tension setpoint generator 90, a contact pressure limit value transmitter 100, a controller 99, a comparator 92 as well as one equipped with a timer 96 Comparator 102 has a signal line 56 with the thread tension sensor 54 via a line 50 with the thread cutting device 52 and via a line 38 connected to the thread tensioner 36.
  • the comparator 92 will thereby is over the over the signal line 56 with the yarn tension and actual values Fsp via the signal line 91 with the yarn tension target values supplied to Fsp.
  • the generated comparator signal passes through the signal line 95 to the controller 99, which ensures about the Stel line 38 that at the yarn tensioner 36, a contact pressure APD is pending, a constant tensile yarn force Fsp is ensured.
  • the controller signal is also fed via line 97 to comparator 102, which is preferably equipped with a timer 96.
  • the comparator 102 is also connected via a line 101 to a contact pressure limit indicator 100 and is connected on the output side to the thread cutting device 52 via the line 50.
  • the thread 22 may not between the brake actuators 114, 116, but before, runs behind or next to these brake actuators. Because such Misuse of the thread 22 by the operating personnel is often not is noticed, in these cases there is a risk that the Thread 22, although the brake plate with maximum contact pressure are employed with a thread tension that is too low is wound up, resulting in a faulty because too soft spooled package 14 leads.
  • Such a misalignment of the thread 22 can occur during the regular winding operation, for example by The thread will come out due to a thread loop. However, the thread cannot be misdirected proper reinsertion of the thread in the course of a Thread connection process after a thread cut or Thread breakage arise.
  • the thread tension of the running thread 22 is continuously sensed via the thread tension sensor 54 and the determined thread tension actual value Fsp is compared in the comparator 92 with a thread tension setpoint Fsp Soll , which is specified by a thread tension setpoint generator 90.
  • the comparator 92 is connected to a controller 99, which ensures that the required contact pressure APD is always present on the thread tensioner 36.
  • the corresponding controller signal which corresponds to a certain contact pressure APD , the brake actuator 114, 116 of the thread tensioner 36, is also applied to a further comparator 102, which is equipped with a timer 96.
  • the comparator 102 is also connected on the input side to a contact pressure limit value sensor 100, which defines the maximum permissible contact pressure APD max . If the comparator 102 determines in its comparison that the contact pressure APD is a predetermined period of time t 2 -t 1 the predetermined maximum contact pressure APD max is reached or exceeded, the thread cutting device 52 is activated via the line 50 and the running thread 22 is separated.
  • the workstation computer 32 solves the following Actions from:
  • the bobbin frame 64 is immediately lifted from the winding drum 60 and thereby prevents the thread end (upper thread 80) running onto the circumferential surface of the cheese 14 from being rolled in by the winding drum 60 in such a way that it is no longer later through the suction nozzle 66 is recordable.
  • the cheese 14 is also braked to a standstill by a coil brake (not shown).
  • the lower thread sensor 28 detects whether there is a lower thread 34. With a positive signal from the lower thread sensor 28, a thread end connection process is started. This means that the hook tube 68 is first activated in such a way that its mouth enters the thread path of the thread 22 and engages the lower thread 34 fixed on the thread tensioner 36.
  • the looper tube 68 is then pivoted along the movement path 74, so that the gripped lower thread 34 is inserted into the splicing device 40.
  • the upper thread take-up is started subsequently or simultaneously.
  • the mouth 84 of the suction nozzle 66 is pivoted to the circumference of the cheese 14 and the winding drum 60 is driven against the winding direction, so that the cheese 14 rotates backwards.
  • the upper thread 80 is picked up by the surface of the package 14 and optionally cleaned by means of a thread cutting and sensor device (not shown) arranged within the suction nozzle 66, that is to say faulty because it is too soft , wound on the package 14 piece of thread is cut out and suctioned off.
  • the splicing device 40 is then caused to connect the lower thread 34 to the upper thread 80. Then, initiated by the workstation computer 32, the bobbin frame 64 is lowered again, so that the cheese 14 comes into contact with the winding drum 60 again and the winding process is started again.
  • the resulting thread tension (thread tension) is immediately detected by the thread tension sensor 54 and is fed via the signal line 56 as a thread tension signal Fsp to the workstation computer 32, which also carries out the above-described checking of the contact pressure APD of the thread tensioner 36.
  • Monitoring the contact pressure of the thread tensioner 36 does not only take place while the job is ramping up 10 after a thread connection process, that is, at a relatively low winding speed of the thread 22 of for example 100 m / min, but also during regular Winding process in which, for example, winding speeds of about 2000 m / min of thread 22 can be achieved.
  • the workstation computer 32 If it is determined during regular winding operation that the contact pressure APD has reached or exceeded a predetermined limit value for a predetermined period of time, the workstation computer 32 also ensures here that a controlled thread cutting and a shutdown of the winding station 10 concerned take place.
  • the thread tensioner 36 ensures that faulty (too soft) wound thread 22 is recognized immediately and that a fault rectification can be initiated immediately. Overall, the method according to the invention thus ensures the quality of the packages 14 produced by the winding machines 1.

Description

Die Erfindung betrifft ein Verfahren zum Betreiben einer Arbeitsstelle einer Kreuzspulen herstellenden Textilmaschine mit den im Oberbegriff des Anspruchs 1 genannten Merkmalen.The invention relates to a method for operating a Work station of a textile machine producing cross-wound bobbins with the features mentioned in the preamble of claim 1.

Solche Kreuzspulen herstellende Textilmaschinen sind beispielsweise durch die DE 196 50 932 A1 bekannt. Derartige, sogenannte Kreuzspulautomaten besitzen eine Vielzahl von als Spulstellen ausgebildeten Arbeitsstellen, die üblicherweise in Längserstreckung der Spulmaschine nebeneinander angeordnet sind. Zur Steuerung und Überwachung ist dabei jeder Spulstelle ein separater Arbeitsstellenrechner zugeordnet. Die einzelnen Arbeitsstellenrechner sind außerdem über einen Maschinenbus mit einer Zentralsteuereinheit der Spulmaschine verbunden.Such cross-wound bobbins are textile machines known for example from DE 196 50 932 A1. Such so-called cross-winder machines have one Large number of work stations designed as winding units, which is usually in the longitudinal direction of the winding machine are arranged side by side. For control and monitoring each winding unit is a separate one Assigned to job computer. The single ones Workstation computers are also via a machine bus connected to a central control unit of the winding machine.

Zum Ver- und Entsorgen ihrer Arbeitsstellen weisen derartige Kreuzspulautomaten in der Regel eine Logistikeinrichtung in Form eines Spulen- und Hülsentransportsystems auf. In diesem Spulen- und Hülsentransportsystem laufen, aufrecht auf den Dornen von Transporttellern stehend, Ablaufspulen, sogenannte Spinnkopse beziehungsweise Leerhülsen um.To supply and dispose of their workplaces have such Automatic winding machines usually have a logistics facility in Form of a coil and tube transport system. In this Coil and core transport system run, upright on the Spines of transport plates standing, drain spools, so-called Spinning bobbins or empty tubes around.

Des weiteren verfügen solche Spulmaschinen über ein die Arbeitsstellen selbsttätig versorgendes Serviceaggregat in Form eines sogenannten Kreuzspulenwechslers.
Der Kreuzspulenwechsler übergibt fertiggestellte Auflaufspulen aus dem Spulenrahmen der Arbeitsstelle an eine maschinenlange Transporteinrichtung, die die Kreuzspulen zu einer maschinenendseitig angeordneten Übergabestation befördert. Anschließend wechselt das Serviceaggregat eine neue Leerhülse in den Spulenrahmen der betreffenden Arbeitsstelle ein.Furthermore, such winding machines have a service unit that automatically supplies the workstations in the form of a so-called cross-wound bobbin changer.
The cross-wound bobbin handover delivers finished winding bobbins from the bobbin frame of the work station to a machine-long transport device which conveys the cross-wound bobbins to a transfer station arranged on the machine end. The service unit then changes a new empty tube into the coil frame of the job in question.

Es ist bekannt, während des Umspulens des Garns von einer Ablaufspule auf eine Auflaufspule den laufenden Faden durch einen Fadenzugkraftsensor zu überwachen und die Fadenzugkraft mittels eines Fadenspanners auf einem vorbestimmten Niveau zu halten. Das heißt, mittels des Fadenspanners wird eine im wesentlichen konstante Fadenzugkraft des laufenden Fadens eingestellt, um auf diese Weise ein gleichmäßiges Aufspulen des Fadens auf der Auflaufspule sicherzustellen.It is known during the winding of the yarn by one On a take-up spool through the running thread to monitor a thread tension sensor and the thread tension by means of a thread tensioner at a predetermined level hold. That is, by means of the thread tensioner a essentially constant thread tension of the running thread set to in this way even winding of the thread on the package.

Aus der DE 41 29 803 A1 ist bekannt, die aktuelle Fadenzugkraft des laufenden Fadens mit einem Fadenzugkraftsensor zu detektieren. Mittels einer von diesem Fadenzugkraftsensor durchgeführten Fadenzugkraftmessung am laufenden Faden wird ein Stellsignal für den Fadenspanner bereitgestellt, der entsprechend dem Stellsignal eine mehr oder weniger große Bremswirkung auf den laufenden Faden ausübt. Der Fadenspanner besitzt hierzu eine mit einer variablen Andruckkraft beaufschlagbare Fadenbremseinrichtung. Ein derartiger Fadenspanner ist beispielsweise aus der DE 41 30 301 A1 bekannt. Durch das Zusammenwirken des Fadenzugkraftsensors mit dem Fadenspanner wird sichergestellt, daß das Garn mit einer definierten Fadenzugkraft auf die Auflaufspule gespult wird.The current one is known from DE 41 29 803 A1 Thread tension of the running thread with one Detect thread tension sensor. Using one of these Thread tension sensor performed thread tension measurement on running thread becomes a control signal for the thread tensioner provided that one more according to the control signal or less braking effect on the running thread exercises. For this purpose, the thread tensioner has one with a variable pressure force can be applied to the thread brake device. Such a thread tensioner is for example from the DE 41 30 301 A1 known. By the interaction of the Thread tension sensor with the thread tensioner ensured that the yarn with a defined Thread tension is wound on the package.

Bei dem aus der DE 41 29 803 A1 bekannten Fadenzugkraftsensor wird der Faden über ein Fadenführungselement geführt, das an einem Kopfende einer in einem Magnetfeld angeordneten Tauchspule angebracht ist. Mit einem derartigen Fadenzugkraftsensor kann ein Tauchspulenstrom zum Halten der Position der Tauchspule als direkte Größe für die Fadenzugkraft entnommen werden, da eine proportionale Abhängigkeit zwischen der Fadenzugkraft und dem Tauchspulenstrom besteht. Durch Auswertung des Tauchspulenstroms läßt sich somit der Verlauf der Fadenzugkraft überwachen.In the thread tension sensor known from DE 41 29 803 A1 the thread is guided over a thread guiding element a head end arranged in a magnetic field Plunger is attached. With such a Thread tension sensor can use a moving coil current to hold the Position of the moving coil as a direct variable for the Thread tension can be taken as a proportional Dependency between the thread tension and the There is a moving coil current. By evaluating the The coil current can thus be the course of the Monitor thread tension.

Beim Betrieb der Spulmaschine können Betriebszustände auftreten, bei denen der Faden nicht im Bereich der Fadenbremseinrichtung des Fadenspanners läuft. Der Faden läuft beispielsweise neben, vor oder hinter der Fadenbremseinrichtung. Da der Umspulvorgang hierdurch nicht unmittelbar betroffen ist, ist diese Fehlführung des Fadens nicht immer unmittelbar erkennbar, jedoch ist hierbei nachteilig, daß es durch die fehlende Regulierung der Fadenzugkraft zu einer fehlerhaften, in der Regel zu weich gewickelten Auflaufspule kommt.Operating states can occur during the operation of the winding machine occur where the thread is not in the range of Thread brake device of the thread tensioner is running. The string runs next to, in front of or behind the Thread braking device. Because this does not result in the rewinding process is directly affected, this misdirection of the thread not always immediately recognizable, but here it is disadvantage that it is due to the lack of regulation of the Thread tension to a faulty, usually too soft wound package comes.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren der gattungsgemäßen Art anzugeben, mit dem eine hohe Wickelqualität der Auflaufspulen sichergestellt werden kann.The invention is therefore based on the object of a method of the generic type with which a high Winding quality of the package can be ensured.

Erfindungsgemäß wird diese Aufgabe durch ein Verfahren mit den im Anspruch 1 genannten Merkmalen gelöst.According to the invention, this object is achieved by a method solved the features mentioned in claim 1.

Dadurch, daß der Anpreßdruck einer auf den Faden wirkenden Fadenbremseinrichtung des Fadenspanners durch den Arbeitsstellenrechner vorgegeben und ständig mit einem vorbestimmten Anpreßdruck-Grenzwert verglichen wird, kann sofort festgestellt werden, wenn der augenblickliche Anpreßdruck den vorgegeben Grenzwert und für eine vorgebbare Zeitspanne erreicht bzw. überschritten hat.
Auf diese Weise ist zuverlässig gewährleistet, daß jedes Erreichen beziehungsweise Überschreiten des Grenzwertes über eine vorbestimmte Zeitspanne, das seine Ursache beispielsweise in einer fehlerhaften Fadenführung haben kann, sofort detektiert wird, und entsprechende Gegenmaßnahmen eingeleitet werden können. Hierdurch wird vorteilhafterweise vermieden, daß eine Auflaufspule durch einen fehlerhaft geführten Faden zu weich und somit fehlerhaft gespult wird. Insgesamt erhöht sich damit die Effektivität der Spulmaschine, da durch frühzeitiges Erkennen eines Problems unmittelbar korrigierend eingegriffen werden kann. Ferner ist durch das erfindungsgemäße Verfahren sichergestellt, daß alle hergestellten Auflaufspulen eine im wesentlichen gleichbleibende, hohe Spulenqualität aufweisen, insbesondere mit einer gleichbleibenden, definierten Fadenspannung aufgespult sind.Because the contact pressure of a thread braking device of the thread tensioner acting on the thread is predetermined by the workstation computer and is constantly compared with a predetermined contact pressure limit value, it can be determined immediately when the current contact pressure has reached or exceeded the predetermined limit value and for a predeterminable period of time ,
In this way, it is reliably ensured that each reaching or exceeding the limit value over a predetermined period of time, which may be caused, for example, by faulty thread guidance, is detected immediately, and appropriate countermeasures can be initiated. This advantageously avoids that a package is too soft and thus incorrectly wound by a faulty thread. Overall, this increases the effectiveness of the winding machine, since corrective action can be taken immediately by early detection of a problem. Furthermore, the method according to the invention ensures that all of the winding packages produced have an essentially constant, high package quality, in particular are wound up with a constant, defined thread tension.

In bevorzugter Ausgestaltung der Erfindung ist des weiteren vorgesehen, daß der Anpreßdruck der Fadenbremseinrichtung während eines Hochlaufens der Spule nach einem Spleißvorgang, in dem Oberfaden und Unterfaden gesucht und automatisch verbunden wurden, überwacht wird. Hierdurch kann bereits unmittelbar nach Anlaufen der Arbeitsstelle eine unkorrekte Führung des Fadens, insbesondere im Bereich des Fadenspanners, erkannt werden. Das heißt, wenn der Faden nicht richtig im Fadenspanner zwischen dessen Bremstellern geführt ist, wird dies vom Arbeitsstellenrechner aufgrund des Erreichens oder Überschreitens eines vorgegebenen Anpreßdruckgrenzwertes sofort erkannt und automatisch ein kontrollierter Fadenschnitt durchgeführt.
Anschließend wird eine vorgebbare Länge des Fadens wieder von der Auflaufspule abgespult und abgeschnitten. Der Spulprozeß wird schließlich nach dem neuerlichen Verbinden des Unterfadens mit dem Oberfaden fortgeführt. Durch diese Maßnahme wird vorteilhafterweise erreicht, daß eine durch eine nicht ordnungsgemäße Führung des Fadens fehlerhaft auf die Auflaufspule aufgewickelte Fadenmenge sofort wieder von der Auflaufspule entfernt werden kann. Es wird somit eine gleichbleibende Qualität der gesamten Auflaufspule sichergestellt. Bevorzugt kann vorgesehen sein, daß nach mehrmaligem wiederholten Ansprechen der Anpreßdrucküberwachung in der Anlaufphase die Arbeitsstelle Stillgesetzt und ein entsprechendes Störsignal generiert wird.In a preferred embodiment of the invention it is further provided that the contact pressure of the thread brake device is monitored during a run-up of the bobbin after a splicing process in which the upper thread and the lower thread have been searched and automatically connected. As a result, an incorrect guidance of the thread, in particular in the area of the thread tensioner, can be recognized immediately after starting up the job. This means that if the thread is not correctly guided in the thread tensioner between its brake actuators, this is immediately recognized by the workstation computer when a predetermined contact pressure limit value is reached or exceeded, and a controlled thread cut is carried out automatically.
A predefinable length of the thread is then unwound again from the package and cut off. The winding process is finally continued after the lower thread has been connected again to the upper thread. By this measure it is advantageously achieved that an amount of thread wound incorrectly on the package due to improper guiding of the thread can be immediately removed from the package. This ensures a constant quality of the entire package. It can preferably be provided that after repeated contacting of the contact pressure monitoring in the start-up phase, the work station is stopped and a corresponding interference signal is generated.

Ferner ist in bevorzugter Ausgestaltung der Erfindung vorgesehen, daß die Überwachung des Anpreßdruckes der Fadenbremseinrichtung auch während des regulären Spulprozesses durchgeführt wird. Somit kann auch hier, wenn der Faden mit einer Spulgeschwindigkeit von bis zu 2.000 m/min läuft, durch Überwachen des Anpreßdruckes der Fadenbremseinrichtung eine ordnungsgemäße Führung des Faden und damit eine definierte Fadenzugkraft sichergestellt werden. Auch hier erfolgt, wenn der Anpreßdruck für eine vorgebbare Zeitspanne einen vorgegebenen Grenzwert erreicht oder überschritten hat, ein kontrollierter Fadenschnitt. Anschließend wird ein Störsignal generiert, das eine notwendige Überprüfung und/oder Reparatur der betreffenden Arbeitsstelle anzeigt. Furthermore, in a preferred embodiment of the invention provided that the monitoring of the contact pressure of the Thread brake device also during the regular Winding process is carried out. So here too, if the thread with a winding speed of up to 2,000 m / min runs, by monitoring the contact pressure of the Thread brake device proper guidance of the thread and thus a defined thread tension is ensured become. This also takes place when the contact pressure for one Predeterminable period of time reaches a predetermined limit a controlled thread cut. An interference signal is then generated, the one necessary inspection and / or repair of the concerned Indicates job.

Weitere bevorzugte Ausgestaltungen der Erfindung ergeben sich aus den übrigen, in den Unteransprüchen genannten Merkmalen.Further preferred configurations of the invention result from the other features mentioned in the subclaims.

Die Erfindung wird nachfolgend anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert.The invention is described in the following in the Drawings shown embodiment closer explained.

Es zeigen:

Figur 1
eine Seitenansicht einer Arbeitsstelle (Spulstelle) einer Kreuzspulen herstellenden Textilmaschine,
Figur 2
eine schematische Darstellung des Arbeitsstellenrechners einer Spulstelle, der mit einem Fadenzugkraftsensor, einem Fadenspanner sowie einer Fadenschneideinrichtung in Verbindung steht.
Show it:
Figure 1
2 shows a side view of a work station (winding station) of a textile machine producing cross-wound bobbins,
Figure 2
a schematic representation of the workstation computer of a winding unit, which is connected to a thread tension sensor, a thread tensioner and a thread cutting device.

Figur 1 zeigt in Seitenansicht eine mit 10 bezeichnete Spulstelle einer Kreuzspulen herstellenden Textilmaschine 1. Derartige, als Kreuzspulautomaten bekannte Textilmaschinen verfügen über eine Vielzahl nebeneinander angeordneter Spulstellen (Arbeitsstellen) 10, auf denen Ablaufspulen 12 (nachfolgend auch Spinnkopse genannt) zu großvolumigen Auflaufspulen 14 (nachfolgend auch Kreuzspulen genannt) umgespult werden. Die Spinnkopse 12 gelangen hierbei über eine Transporteinrichtung 16 zu den einzelnen Spulstellen 10. Die Transporteinrichtung 16 umfaßt, wie an sich bekannt, eine Vielzahl, im einzelnen nicht näher bezeichneter Transportstrecken, auf denen, auf Transporttellern 20 aufgesteckt, Spinnkopse 12 oder Leerhülsen 18 befördert werden. Figure 1 shows a side view of a designated 10 Bobbin of a textile machine producing cross-wound bobbins 1. Such textile machines known as automatic winder machines have a large number of juxtaposed Spooling stations (work stations) 10, on which payout spools 12 (hereinafter also called spinning bobbins) too large Package 14 (hereinafter also referred to as cheese) be rewound. The spinning heads 12 pass over here a transport device 16 to the individual winding units 10. The transport device 16 comprises, as is known per se, a Plenty, not specified in detail Transport routes on which, on transport plates 20 attached, spinning heads 12 or empty tubes 18 conveyed become.

Von einem sich in Spulposition I befindenden Spinnkops 12 wird ein Faden 22 abgezogen. Der vom Spinnkops 12 abgezogene Faden 22 passiert auf seinem Weg zur Kreuzspule 14 in Fadenlaufrichtung 24 zunächst einen Unterfadensensor 28, der über eine Signalleitung 30 mit einem Arbeitsstellenrechner 32 verbunden ist.From a spinning cop 12 in winding position I. a thread 22 is drawn off. The one withdrawn from the spinning cop 12 Thread 22 passes on its way to the package 14 in Thread running direction 24 first a lower thread sensor 28, the via a signal line 30 with a workstation computer 32 connected is.

Mittels dieses Unterfadensensors 28 wird zum Beispiel nach einem Fadenbruch oder einem kontrollierten Fadenschnitt, vor Einleitung der Oberfadensuche, festgestellt, ob überhaupt ein Unterfaden 34 vorhanden ist.By means of this lower thread sensor 28, for example, after a thread break or a controlled thread cut Initiation of the upper thread search, determined whether at all Bobbin thread 34 is present.

Oberhalb des Unterfadensensors 28 ist ein Fadenspanner 36 angeordnet. Der Fadenspanner 36 umfaßt, wie in Figur 2 angedeutet ist, zwei Bremsteller 114, 116, die auf den laufenden Faden 22 einen Anpreßdruck APD ausüben. Der Fadenspanner 36 wird zu diesem Zweck vom Arbeitsstellenrechner 32 über eine Steuerleitung 38 definiert angesteuert.A thread tensioner 36 is located above the lower thread sensor 28 arranged. The thread tensioner 36 comprises, as in FIG. 2 is indicated, two brake actuators 114, 116, which on the Apply a contact pressure APD to the running thread 22. The Thread tensioner 36 is used for this purpose Workstation computer 32 defined via a control line 38 driven.

Außerhalb des regulären Fadenlaufweges ist eine Fadenendenverbindungseinrichtung 40, die beispielsweise als pneumatischer Spleißer ausgebildet ist, angeordnet. Die Spleißeinrichtung 40 ist über eine Signalleitung 42 ebenfalls mit dem Arbeitsstellenrechner 32 verbunden. Im weiteren Verlauf des Fadenlaufweges ist zur Feststellung von Garnfehlern ein Fadenreiniger 44 angeordnet. Mittels des Fadenreinigers 44 wird ständig die Qualität des laufenden Fadens überwacht. Die Signale des Fadenreinigers 44 werden zur Auswertung über eine Signalleitung 48 dem Arbeitsstellenrechner 32 zugeführt. Beim Auftreten eines Garnfehlers wird von dem Arbeitsstellenrechner 32 über eine Steuerleitung 50 eine Schneideinrichtung 52 betätigt und der Faden 22 getrennt.Outside of the regular thread path is one Thread end connection device 40, for example as pneumatic splicer is arranged. The Splice device 40 is also via a signal line 42 connected to the workstation computer 32. In the further The course of the thread path is to determine Yarn defects a thread cleaner 44 is arranged. By means of the Thread cleaner 44 is constantly the quality of the current Thread monitored. The signals of the thread cleaner 44 are for evaluation via a signal line 48 Job computer 32 supplied. When a Yarn error is from the job computer 32 via a Control line 50 actuates a cutting device 52 and the Thread 22 separated.

In Fadenlaufrichtung 24 sind nach dem Fadenreiniger 44 noch ein Fadenzugkraftsensor 54 sowie eine Paraffiniereinrichtung 46 angeordnet. Der Fadenzugkraftsensor 54 ist dabei über eine Signalleitung 56 ebenfalls mit dem Arbeitsstellenrechner 32 verbunden.In the thread running direction 24 there are still 44 after the thread cleaner a thread tension sensor 54 and a paraffinizing device 46 arranged. The thread tension sensor 54 is a Signal line 56 also with the workstation computer 32 connected.

Während des Spulbetriebes wird mittels des Fadenzugkraftsensors 54 ständig die Fadenzugkraft des laufenden Fadens 22 überwacht und entsprechend dem vom Fadenzugkraftsensor 54 gelieferten Fadenzugkraftsignal Fspist über den Arbeitsstellenrechner 32 der Fadenspanner 36 angesteuert. Das heißt, die Bremsteller 114, 116 des Fadenspanners 36 beaufschlagen den Faden 22 mit einem Anpreßdruck APDist, der sicherstellt, daß sich am laufenden Faden 22 eine im wesentlichen konstante Fadenzugkraft Fspist einstellt, die eine gleichmäßige Packungsdichte der zufertigenden Kreuzspule 14 gewährleistet.During the winding operation, the thread tension of the thread 22 is monitored by the yarn tension sensor 54 continuously and according to the supplied by the yarn tension sensor 54 yarn tension signal Fsp is controlled via the work station computer 32 of the yarn tensioner 36th That is, the brake plate 114, 116 of the yarn tensioner 36 urging the thread 22 with a contact pressure APD is, which ensures that the running thread 22 has a substantially constant tensile yarn force Fsp is set, which ensures a uniform packing density of the zufertigenden cheese fourteenth

Auf die Paraffiniereinrichtung 46 folgt in Fadenlaüfrichtung 24 schließlich ein Fadenführer 58, über den der Faden 22 auf eine Spultrommel 60, eine sogenannte Nuttrommel, aufläuft, die für eine kreuzweise Verlegung des Fadens 22 nach der Wicklungsart "wilde Wicklung" sorgt. Die Kreuzspule 14 ist über eine nicht näher dargestellte Hülse in einem schwenkbar gelagerten Spulenrahmen 64 drehbar gelagert und liegt dabei mit ihrem Außenumfang an der einzelmotorisch angetriebenen Spultrommel 60 an, die die Kreuzspule 14 über Reibschluß mitnimmt. The paraffinizing device 46 follows in the thread running direction 24 finally a thread guide 58 over which the thread 22 opens a winding drum 60, a so-called grooved drum, runs on, the for a crosswise laying of the thread 22 after the Type of winding "wild winding" ensures. The cheese 14 is via a sleeve, not shown, in a pivotable mounted coil frame 64 rotatably supported and lies with its outer circumference on the single motor driven Spool drum 60, which the cheese 14 via friction entraining.

Die Spulstelle 10 besitzt ferner eine Saugdüse 66 sowie ein Greiferrohr 68. Das Greiferrohr 68 dient dabei zum Ergreifen des vom Spinnkops 12 stammenden Unterfadens 34, der bei einem kontrollierten Fadenreinigungsschnitt oder bei einem Fadenbruch oberhalb des Fadenspanners in der Regel im Fadenspanner 36 gehalten ist. Das um eine Drehachse 72 verschwenkbare Greiferrohr 68 ist an eine zentrale Unterdruckversorgung 76 der Spulmaschine 1 angeschlossen, die mit einer Unterdruckquelle 78 in Verbindung steht. Die Greiferrohrmündung bewegt sich dabei entlang der gestrichelt eingezeichneten Bewegungsbahn 74. Das Verschwenken des Greiferrohrs 68 erfolgt, durch den Arbeitsstellenrechner 32 gesteuert, über eine an sich bekannte und daher nicht näher dargestellte Antriebseinrichtung.The winding unit 10 also has a suction nozzle 66 and a Gripper tube 68. The gripper tube 68 is used for gripping of the lower thread 34 originating from the spinning cop 12, which at a controlled thread cleaning cut or at a Thread break above the thread tensioner usually in the Thread tensioner 36 is held. That about an axis of rotation 72 pivotable gripper tube 68 is at a central Vacuum supply 76 connected to the winding machine 1, the communicates with a vacuum source 78. The Gripper tube mouth moves along the dashed line marked trajectory 74. The pivoting of the Gripper tube 68 is carried out by the workstation computer 32 controlled, via a known and therefore not closer shown drive device.

Die Saugdüse 66 dient zum Aufnehmen eines auf die Kreuzspule 14 aufgelaufenen Oberfadens 80. Hierzu ist die Saugdüse 66 um eine Drehachse 82 derart verschwenkbar, daß ihre Mündung 84 eine Bewegungsbahn 86 durchläuft. Die Saugdüse 66 ist ebenfalls mit der Unterdruckversorgung 76 verbunden. Die Schwenkbewegung der Saugdüse 66 wird über den Arbeitsstellenrechner 32 durch Ansteuern einer an sich bekannten, nicht dargestellten Antriebseinrichtung, vorzugsweise eines Kurvenscheibenpaketes, ausgelöst.The suction nozzle 66 serves to receive one on the cheese 14 accumulated upper thread 80. For this purpose, the suction nozzle 66 is an axis of rotation 82 can be pivoted such that its mouth 84 traverses a trajectory 86. The suction nozzle 66 is also connected to the vacuum supply 76. The Swiveling movement of the suction nozzle 66 is over the Job computer 32 by controlling one per se known drive device, not shown, preferably a cam disk package.

Die Spulstelle 10 umfaßt weitere mechanische, elektrische und pneumatische Komponenten, die im Rahmen der vorliegenden Beschreibung nicht näher erläutert werden sollen.The winding unit 10 includes other mechanical, electrical and pneumatic components under the present Description should not be explained in more detail.

In Figur 2 ist schematisch der Arbeitsstellenrechner 32 sowie dessen Verschaltung mit dem Fadenspanner 36, dem Fadenzugkraftsensor 54 und der Fadenschneideinrichtung 52 dargestellt.The workstation computer 32 and its connection with the thread tensioner 36, the Thread tension sensor 54 and thread cutting device 52 shown.

Der in Fig.2 lediglich stark schematisch dargestellte Fadenspanner 36 ist an sich bekannt und beispielsweise in der DE 195 26 901 A1 ausführlich beschrieben.The only shown schematically in Figure 2 Thread tensioner 36 is known per se and for example in the DE 195 26 901 A1 described in detail.

Als Fadenzugkraftsensor 54 kommt vorzugsweise eine Einrichtung zur Verwendung, wie sie beispielsweise durch die DE 41 29 803 A1 ebenfalls bekannt ist.One preferably comes as the thread tension sensor 54 Device for use, as for example by the DE 41 29 803 A1 is also known.

Eine elektrisch ansteuerbare Fadenschneideinrichtung, wie sie unter der Bezugszahl 52 angedeutet ist, ist im Textilmaschinenbau seit langem Stand der Technik. Solche Einrichtungen weisen in der Regel eine durch einen Elektromagnet gezielt ausfahrbare Schneide auf, die bei Bestromung des Elektromagneten gegen einen Anschlag gedrückt wird und dabei den vor der Schneide vorbeilaufenden Faden zuverlässig durchtrennt.An electrically controllable thread cutting device like the one below is indicated by the reference number 52, is in Textile engineering for a long time state of the art. Such Facilities usually have one by one Electromagnet selectively extendable cutting edge, which at Power supply to the electromagnet pressed against a stop the thread passing in front of the cutting edge reliably severed.

Der Arbeitsstellenrechner 32, der im Ausführungsbeispiel über einen Fadenspannungs-Sollwertgeber 90, einen Anpreßdruck-Grenzwertgeber 100, einen Regler 99, einen Komparator 92 sowie über einen mit einem Zeitglied 96 ausgestatteten Komparator 102 verfügt, ist über eine Signalleitung 56 mit dem Fadenzugkraftsensor 54, über'eine Stelleitungen 50 mit der Fadenschneideinrichtung 52 und über eine Stelleitung 38 mit dem Fadenspanner 36 verbunden.The workstation computer 32, which in the exemplary embodiment a thread tension setpoint generator 90, a contact pressure limit value transmitter 100, a controller 99, a comparator 92 as well as one equipped with a timer 96 Comparator 102 has a signal line 56 with the thread tension sensor 54 via a line 50 with the thread cutting device 52 and via a line 38 connected to the thread tensioner 36.

Wie in Fig.2 angedeutet, wird der Komparator 92 dabei über die über die Signalleitung 56 mit den Fadenzugkraft-Istwerten Fspist sowie über die Signalleitung 91 mit den Fadenzugkraft-Sollwerten Fspsoll versorgt. Das generierte Komparatorsignal gelangt über die Signalleitung 95 zum Regler 99, der über die Stelleitung 38 dafür sorgt, daß am Fadenspanner 36 ein Anpreßdruck APDist ansteht, der eine konstante Fadenzugkraft Fspist gewährleistet.
Das Reglersignal wird über die Leitung 97 des weiteren auf den Komparator 102 gegeben, der vorzugsweise mit einem Zeitschaltglied 96 ausgestattet ist. Der Komparator 102 ist über eine Leitung 101 außerdem mit einem Anpreßdruck-Grenzwertgeber 100 verbunden, sowie ausgangsseitig über die Stelleitung 50 an die Fadenschneideinrichtung 52 angeschlossen.As indicated in Figure 2, the comparator 92 will thereby is over the over the signal line 56 with the yarn tension and actual values Fsp via the signal line 91 with the yarn tension target values supplied to Fsp. The generated comparator signal passes through the signal line 95 to the controller 99, which ensures about the Stel line 38 that at the yarn tensioner 36, a contact pressure APD is pending, a constant tensile yarn force Fsp is ensured.
The controller signal is also fed via line 97 to comparator 102, which is preferably equipped with a timer 96. The comparator 102 is also connected via a line 101 to a contact pressure limit indicator 100 and is connected on the output side to the thread cutting device 52 via the line 50.

Funktion des erfindungsgemäßen Verfahrens:Function of the method according to the invention:

Während des Umspulprozesses läuft der von der Ablaufspule 12 abgewickelte Fadens 22 auf seinem Weg zur Auflaufspule 14 in der Regel zwischen den Bremstellern 114, 116 des Fadenspanner 36. Durch definiertes Einstellen des Anpreßdruckes APD der Bremsteller 114, 116 wird dabei dafür gesorgt, daß der Faden 22 mit zumindest annähernd konstantes Fadenzugkraft auf die Kreuzspule 14 aufgespult wird. Die Fadenzugkraft wird während des gesamten Spulprozesses durch den Fadenzugkraftsensor 54 überwacht.During the rewinding process, it runs from the payout spool 12 unwound thread 22 on its way to the package 14 in usually between the brake actuators 114, 116 of the thread tensioner 36. By defined setting of the contact pressure APD Brake actuator 114, 116 ensures that the thread 22 with at least approximately constant thread tension on the Cross-wound bobbin 14 is wound up. The thread tension is during of the entire winding process by the thread tension sensor 54 supervised.

In Ausnahmefällen kann es vorkommen, daß der Faden 22 nicht zwischen den Bremstellern 114, 116 geführt ist, sondern vor, hinter oder neben diesen Bremstellern läuft. Da eine solche Fehlführung des Fadens 22 vom Bedienpersonal oft nicht bemerkt wird, besteht in diesen Fällen die Gefahr, daß der Faden 22, obwohl die Bremsteller mit maximalem Anpreßdruck angestellt sind, mit einer zu niedrigen Fadenzugkraft aufgespult wird, was zu einer fehlerhaften, weil zu weich gespulten Auflaufspule 14 führt.In exceptional cases, the thread 22 may not between the brake actuators 114, 116, but before, runs behind or next to these brake actuators. Because such Misuse of the thread 22 by the operating personnel is often not is noticed, in these cases there is a risk that the Thread 22, although the brake plate with maximum contact pressure are employed with a thread tension that is too low is wound up, resulting in a faulty because too soft spooled package 14 leads.

Zu einer solchen Fehlführung des Fadens 22 kann es während des regulären Spulbetriebes, beispielsweise durch Herausspringen des Fadens infolge einer Fadenschlinge kommen. Eine Fehlführung des Fadens kann allerdings auch durch nicht ordnungsgemäßes Wiedereinführen des Fadens im Zuge eines Fadenverbindungsvorganges nach einem Fadenschnitt oder einem Fadenbruch entstehen.Such a misalignment of the thread 22 can occur during the regular winding operation, for example by The thread will come out due to a thread loop. However, the thread cannot be misdirected proper reinsertion of the thread in the course of a Thread connection process after a thread cut or Thread breakage arise.

Erfindungsgemäß wird die Fadenzugkraft des laufenden Fadens 22 ständig über den Fadenzugkraftsensor 54 abgetastet und der ermittelte Fadenzugkraft-Istwert Fspist im Komparator 92 mit einem Fadenzugkraft-Sollwert FspSoll verglichen, der von einem Fadenzugkraft-Sollwertgeber 90 vorgegeben wird. Ausgangsseitig ist der Komparator 92 mit einem Regler 99 verbunden, der dafür sorgt das am Fadenspanner 36 stets der erforderlich Anpreßdruck APD anliegt.
Das entsprechende Reglersignal, das jeweils einem bestimmten Anpreßdruck APDist der Bremsteller 114, 116 des Fadenspanners 36 entspricht, wird außerdem auf einen weiteren Komparator 102 gelegt, der mit einem Zeitschaltglied 96 ausgestattet ist.
Der Komparator 102 ist eingangsseitig noch mit einem Anpreßdruck-Grenzwertgeber 100 verbunden, der den maximal zulässigen Anpreßdruck APDmax festlegt.
Wenn der Komparator 102 bei seinem Vergleich feststellt, daß der Anpreßdruck APDist eine vorgegebene Zeitspanne t2-t1 den vorgegebenen maximalen Anpreßdruck APDmax erreicht oder überschreitet, wird über die Stelleitung 50 die Fadenschneideinrichtung 52 aktiviert und der laufende Faden 22 getrennt.According to the invention, the thread tension of the running thread 22 is continuously sensed via the thread tension sensor 54 and the determined thread tension actual value Fsp is compared in the comparator 92 with a thread tension setpoint Fsp Soll , which is specified by a thread tension setpoint generator 90. On the output side, the comparator 92 is connected to a controller 99, which ensures that the required contact pressure APD is always present on the thread tensioner 36.
The corresponding controller signal, which corresponds to a certain contact pressure APD , the brake actuator 114, 116 of the thread tensioner 36, is also applied to a further comparator 102, which is equipped with a timer 96.
The comparator 102 is also connected on the input side to a contact pressure limit value sensor 100, which defines the maximum permissible contact pressure APD max .
If the comparator 102 determines in its comparison that the contact pressure APD is a predetermined period of time t 2 -t 1 the predetermined maximum contact pressure APD max is reached or exceeded, the thread cutting device 52 is activated via the line 50 and the running thread 22 is separated.

Der Arbeitsstellenrechner 32 löst daraufhin noch folgende Aktionen aus:The workstation computer 32 then solves the following Actions from:

Über eine nicht dargestellte Antriebseinrichtung wird sofort der Spulenrahmen 64 von der Spultrommel 60 abgehoben und dadurch verhindert, daß das auf die Umfangsfläche der Kreuzspule 14 auflaufende Fadenende (Oberfaden 80) durch die Spultrommel 60 so eingewalzt wird, daß es später durch die Saugdüse 66 nicht mehr aufnehmbar ist. Die Kreuzspule 14 wird außerdem durch eine (nicht dargestellt) Spulenbremse in den Stillstand abgebremst. Außerdem wird durch den Unterfadensensor 28 detektiert, ob ein Unterfaden 34 vorliegt. Bei einem positiven Signal des Unterfadensensors 28 wird ein Fadenendenverbindungsvorgang gestartet.
Dies bedeutet, zunächst wird das Greiferrohr 68 derart angesteuert, daß seine Mündung in den Fadenlaufweg des Fadens 22 gelangt und den am Fadenspanner 36 festgelegten Unterfaden 34 greift. Anschließend wird das Greiferrohr 68 entlang der Bewegungsbahn 74 verschwenkt, so daß der gegriffene Unterfaden 34 in die Spleißeinrichtung 40 eingelegt wird.
Nachfolgend oder gleichzeitig wird die Oberfadenaufnahme gestartet. Zu diesem Zweck wird die Mündung 84 der Saugdüse 66 an den Umfang der Kreuzspule 14 angeschwenkt und die Spultrommel 60 entgegen der Aufwickelrichtung angetrieben, so daß die Kreuzspule 14 rückwärts dreht. Durch den an der Mündung 84 der Saugdüse 66 anliegenden Unterdruck wird der Oberfaden 80 von der Oberfläche der Kreuzspule 14 aufgenommen und gegebenenfalls mittels einer innerhalb der Saugdüse 66 angeordneten (nicht dargestellten) Fadenschneid- und Sensoreinrichtung ausgereinigt, das heißt, das fehlerhaft, weil zu weich, auf die Kreuzspule 14 aufgewickelte Fadenstück wird herausgeschnitten und abgesaugt.About a drive device, not shown, the bobbin frame 64 is immediately lifted from the winding drum 60 and thereby prevents the thread end (upper thread 80) running onto the circumferential surface of the cheese 14 from being rolled in by the winding drum 60 in such a way that it is no longer later through the suction nozzle 66 is recordable. The cheese 14 is also braked to a standstill by a coil brake (not shown). In addition, the lower thread sensor 28 detects whether there is a lower thread 34. With a positive signal from the lower thread sensor 28, a thread end connection process is started.
This means that the hook tube 68 is first activated in such a way that its mouth enters the thread path of the thread 22 and engages the lower thread 34 fixed on the thread tensioner 36. The looper tube 68 is then pivoted along the movement path 74, so that the gripped lower thread 34 is inserted into the splicing device 40.
The upper thread take-up is started subsequently or simultaneously. For this purpose, the mouth 84 of the suction nozzle 66 is pivoted to the circumference of the cheese 14 and the winding drum 60 is driven against the winding direction, so that the cheese 14 rotates backwards. Due to the negative pressure present at the mouth 84 of the suction nozzle 66, the upper thread 80 is picked up by the surface of the package 14 and optionally cleaned by means of a thread cutting and sensor device (not shown) arranged within the suction nozzle 66, that is to say faulty because it is too soft , wound on the package 14 piece of thread is cut out and suctioned off.

Anschließend wird die Saugdüse 66 entlang der Bewegungsbahn 86 nach unten verschwenkt, so daß der Oberfaden 80 ebenfalls in die Spleißeinrichtung 40 eingelegt wird. Der Oberfaden 80 wird dabei durch die Saugdüse 66 sowohl in Anlage an den Fadenzugkraftsensor 54 gebracht als auch in den Fadenreiniger 44 eingefädelt.Then the suction nozzle 66 along the path of movement 86 pivoted downward, so that the upper thread 80 also is inserted into the splicer 40. The upper thread 80 is thereby both by the suction nozzle 66 in contact with the Thread tension sensor 54 brought as well as in the thread cleaner 44 threaded.

Über die Stelleitung 42 wird anschließend die Spleißeinrichtung 40 veranlaßt, den Unterfaden 34 mit dem Oberfaden 80 zu verbinden. Anschließend wird, vom Arbeitsstellenrechner 32 initiiert, der Spulenrahmen 64 wieder abgesenkt, so daß die Kreuzspule 14 wieder mit der Spultrommel 60 in Kontakt kommt und der Spulprozeß wieder aufgenommen wird.
Die dabei am Faden 22 entstehende Fadenzugkraft (Fadenspannung) wird sofort über den Fadenzugkraftsensor 54 erfaßt und über die Signalleitung 56 als Fadenzugkraftsignal Fsp ist dem Arbeitsstellenrechner 32 zugeleitet, der auch die vorstehend beschriebene Kontrolle des Anpreßdruckes APD des Fadenspanners 36 durchführt.Via the line 42, the splicing device 40 is then caused to connect the lower thread 34 to the upper thread 80. Then, initiated by the workstation computer 32, the bobbin frame 64 is lowered again, so that the cheese 14 comes into contact with the winding drum 60 again and the winding process is started again.
The resulting thread tension (thread tension) is immediately detected by the thread tension sensor 54 and is fed via the signal line 56 as a thread tension signal Fsp to the workstation computer 32, which also carries out the above-described checking of the contact pressure APD of the thread tensioner 36.

Wenn der Arbeitsstellenrechner 32 dabei feststellt, daß wiederum für eine vorbestimmte Zeitspanne ein vorgegebener Grenzwert des Anpreßdruckes erreicht oder überschritten wird, wird abermals ein kontrollierter Fadenschnitt durchgeführt und anschließend ein neuer Fadenverbindungsvorgang gestartet. If the job computer 32 determines that again a predetermined one for a predetermined period of time Limit of the contact pressure is reached or exceeded, a controlled thread cut is carried out again and then started a new thread joining process.

Wenn auch nach dem dritten Fadenverbindungsvorgang ein zu hoher Anpreßdruck des Fadenspanners 36 registriert wird, wird die betreffende Spulstelle in Blockierung gesetzt. Ein Rotlicht an der Spulstelle zeigt dabei an, daß ein manueller Eingriff durch das Bedienungspersonals notwendig ist.Even after the third thread joining process, too high contact pressure of the thread tensioner 36 is registered the winding unit in question is blocked. On Red light on the winding unit indicates that a manual Intervention by the operating personnel is necessary.

Ein Überwachung des Anpreßdruckes des Fadenspanners 36 erfolgt nicht nur während des Hochlaufens der Arbeitsstelle 10 nach einem Fadenverbindungsvorgang, das heißt bei einer relativ geringen Spulgeschwindigkeit des Fadens 22 von beispielsweise 100 m/min, sondern auch während des regulären Spulprozesses, bei dem beispielsweise Spulgeschwindigkeiten von zirka 2000 m/min des Fadens 22 erreicht werden.Monitoring the contact pressure of the thread tensioner 36 does not only take place while the job is ramping up 10 after a thread connection process, that is, at a relatively low winding speed of the thread 22 of for example 100 m / min, but also during regular Winding process in which, for example, winding speeds of about 2000 m / min of thread 22 can be achieved.

Wird während des regulären Spulbetriebes festgestellt, daß der Anpreßdruck APDist für eine vorbestimmte Zeitspanne einen vorgegebenen Grenzwert erreicht oder überschritten hat, sorgt auch hier der Arbeitsstellenrechner 32, dafür, daß es zu einem kontrollierten Fadenschnitt und zu einem Stillsetzen der betreffenden Spulstelle 10 kommt.If it is determined during regular winding operation that the contact pressure APD has reached or exceeded a predetermined limit value for a predetermined period of time, the workstation computer 32 also ensures here that a controlled thread cutting and a shutdown of the winding station 10 concerned take place.

Insgesamt wird durch die Überwachung des Anpreßdruckes APDist des Fadenspanners 36 erreicht, daß fehlerhaft (zu weich) aufgewickelter Faden 22 sofort erkannt wird und eine Fehlerbeseitigung unmittelbar eingeleitet werden kann. Das erfindungsgemäße Verfahren führt somit insgesamt zu einer Sicherung der Qualität der von den Spulmaschinen 1 hergestellten Kreuzspulen 14.Overall, by monitoring the contact pressure APD , the thread tensioner 36 ensures that faulty (too soft) wound thread 22 is recognized immediately and that a fault rectification can be initiated immediately. Overall, the method according to the invention thus ensures the quality of the packages 14 produced by the winding machines 1.

Claims (7)

  1. A process for operating a working station (10) of a textile machine (1) manufacturing cross-wound bobbins, having a thread tension sensor (54) connected to a working station computer (32) for monitoring the thread tension of a thread (22) running from a feeding bobbin (12) to a winding bobbin (14) and also a thread tensioner (36) for regulating the thread tension, whereby the working station computer (32) sets the contact pressure (APD) of a thread braking device (114, 116) of the thread tensioner (36) which acts on the thread (22) corresponding to the thread tension determined by the thread tension sensor (54),
    characterised in that the working station computer (32) compares the contact pressure (APDactual) with a predetermined limiting value for the contact pressure (APDmax) and, if the limiting value for a preset time interval (t2-t1) is achieved or exceeded, interrupts the winding process.
  2. A process according to Claim 1,
    characterised in that the monitoring of the contact pressure (APDactual) takes place during the running up of the working station (10) after a splicing operation has taken place.
  3. A process according to one of the preceding Claims,
    characterised in that if the limiting value of the contact pressure (APDmax) for the set time interval (t2-t1) is reached or exceeded, a controlled thread cut is performed, a presettable length of the thread (22) is wound back from the winding bobbin (14) and is cut off and after a new splicing operation has taken place the winding process is continued.
  4. A process according to Claim 3,
    characterised in that the process steps are repeated at least once and when the limiting value of the contact pressure (APDmax) for the set time interval (t2-t1) is reached anew the working station (10) is blocked, i.e. is switched off.
  5. A process according to one of the preceding Claims,
    characterised in that the monitoring of the contact pressure (APDactual) takes place during the regular winding process of the working station (10).
  6. A process according to Claim 5,
    characterised in that when the limiting value of the contact pressure (APDmax) for the preset time interval (t2 - t1) is reached or exceeded, the working station (10) is blocked, i.e. is switched off.
  7. A process according to one of the preceding Claims,
    characterised in that the presettable time interval (t2-t1) is between 1 second and 3 seconds, in particular 2 seconds.
EP00100170A 1999-02-12 2000-01-11 Method for operating a workstation in a textilmachine for making cross wound bobbins Expired - Lifetime EP1028080B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19905860A DE19905860A1 (en) 1999-02-12 1999-02-12 Method for operating a work station of a textile machine producing cross-wound bobbins
DE19905860 1999-02-12

Publications (3)

Publication Number Publication Date
EP1028080A2 EP1028080A2 (en) 2000-08-16
EP1028080A3 EP1028080A3 (en) 2000-11-08
EP1028080B1 true EP1028080B1 (en) 2003-10-22

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EP00100170A Expired - Lifetime EP1028080B1 (en) 1999-02-12 2000-01-11 Method for operating a workstation in a textilmachine for making cross wound bobbins

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US (1) US6340129B1 (en)
EP (1) EP1028080B1 (en)
JP (1) JP4531906B2 (en)
DE (2) DE19905860A1 (en)
TR (1) TR200000387A3 (en)

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CN101104489B (en) * 2006-07-14 2011-02-02 黄福庭 Groove drum guide yarn electric folding-proof device employing self-adapting control and method thereof
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DE102012016853A1 (en) * 2012-08-25 2014-02-27 Saurer Germany Gmbh & Co. Kg Method for connecting upper and lower threads at winding station of cross-winding machine, involves pivoting nozzle at thread run after head part is rotated into position, and rotating part into another position after nozzle passes run
DE102015008166A1 (en) 2015-06-25 2016-12-29 Saurer Germany Gmbh & Co. Kg Method and device for optimizing the density of cheeses produced on the work stations of a cheese-winder
EP3461772B1 (en) 2017-09-29 2022-02-09 Partzsch Spezialdrähte e.K. Method for the optimal utilization of the winding item during unwinding
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Also Published As

Publication number Publication date
EP1028080A2 (en) 2000-08-16
TR200000387A2 (en) 2000-09-21
JP2000238963A (en) 2000-09-05
US6340129B1 (en) 2002-01-22
DE50004117D1 (en) 2003-11-27
EP1028080A3 (en) 2000-11-08
JP4531906B2 (en) 2010-08-25
TR200000387A3 (en) 2000-09-21
DE19905860A1 (en) 2000-08-17

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