EP2238062B1 - Method and apparatus for producing cross-wound bobbins - Google Patents

Method and apparatus for producing cross-wound bobbins Download PDF

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Publication number
EP2238062B1
EP2238062B1 EP08871694.9A EP08871694A EP2238062B1 EP 2238062 B1 EP2238062 B1 EP 2238062B1 EP 08871694 A EP08871694 A EP 08871694A EP 2238062 B1 EP2238062 B1 EP 2238062B1
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Prior art keywords
wound
winding
thread
bobbin
cross
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German (de)
French (fr)
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EP2238062A1 (en
Inventor
Martin Widmann
Petr Poznik
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/38—Arrangements for preventing ribbon winding ; Arrangements for preventing irregular edge forming, e.g. edge raising or yarn falling from the edge
    • B65H54/381—Preventing ribbon winding in a precision winding apparatus, i.e. with a constant ratio between the rotational speed of the bobbin spindle and the rotational speed of the traversing device driving shaft
    • B65H54/383—Preventing ribbon winding in a precision winding apparatus, i.e. with a constant ratio between the rotational speed of the bobbin spindle and the rotational speed of the traversing device driving shaft in a stepped precision winding apparatus, i.e. with a constant wind ratio in each step
    • 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
    • B65H63/08—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle
    • 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 and an apparatus for producing cross wound packages at a winding station of a textile machine, in which the pitch angle of the wound thread is changed during winding.
  • the device includes a drive for rotating the cross-wound bobbin and at each winding station a variably drivable yarn guide for laying a wound thread in the axial direction of the cheese package under variable pitch angle.
  • crossing angle is used instead of the pitch angle.
  • the value of the crossing angle is twice the value of the pitch angle.
  • DE 103 42 266 A1 From the DE 103 42 266 A1 is a method and an apparatus of the type mentioned in the prior art.
  • goal of DE 103 42 266 A1 is the production of a cross-wound coil with a hard core or a high density in the inner region and a low density in the outer region.
  • the thread is wound at the beginning of the coil travel with a small pitch angle and increases the pitch angle during the coil travel continuously or in small steps.
  • the according to the method of DE 103 42 266 A1 formed Buchwickelspule has a wild winding, since the so-called Windungsdorf constantly changes during winding.
  • the turns ratio is defined as the number of turns of the cross-wound bobbin during a double stroke of the thread guide across the width of the cross-wound bobbin.
  • the invention has for its object to improve a method and an apparatus for producing cross-wound bobbins.
  • the object is achieved in the method with the features of claim 1 and in the device with the features of claim 4.
  • the invention has the advantage that the coil diameter is known at all times. In the case of the known devices, this could hitherto only be achieved by providing a separate sensor at each winding station which measured the coil diameter. By the present invention, this diameter sensor can be saved at each winding station.
  • the fact that the bobbin diameter is always known, can be calculated with the help of the well-known peripheral speed of the cross-wound bobbin, the coil speed and thus also the currently present turns ratio.
  • the cross-wound bobbin is driven at its circumference via a winding roller and consequently rotates at a peripheral speed substantially equal to the peripheral speed of the winding roller.
  • the thread guide for laying the thread to be wound in the axial direction of the cheese package is provided with a variable speed drive, which is controlled by the controller, so that the speed of the thread guide is known. From this, the turns ratio can be calculated in the controller so that the turns ratio is known at all times when the cross-wound bobbin is produced.
  • the known coil diameter allows the targeted winding of the thread always with the optimum pitch angle. It can produce cross-wound bobbins, which are optimally adapted to the subsequent processing steps. For example, good flow properties of the cross-wound bobbin can be achieved by a relatively large pitch angle with a small bobbin diameter and with the bobbin diameter decreasing pitch angle. It can also be targeted cross winding coils with high density, the are particularly suitable for further processing in the weaving or produce dyeing bobbins with a particularly homogeneous coil structure.
  • the winding of the thread with an undesirable turn ratio at which image winding zones occur can be reliably prevented because the turn ratio can be adjusted just before the occurrence of an undesirable value by varying the pitch angle by changing the thread guide speed.
  • the invention is particularly suitable for spinning machines in which the yarn is supplied at a known delivery speed, which is usually constant.
  • the length of the wound thread can be determined directly from the known delivery speed for the control.
  • the peripheral speed of the winding roller In order for the yarn to be wound up with a constant yarn tension at a constant delivery speed, it is necessary for the peripheral speed of the winding roller to be changed in opposite directions during the change in the traversing speed of the yarn guide for changing the pitch angle, so that the resulting winding speed remains constant.
  • the coil diameter is known in the control, it can also be provided that the thread tension is optimized in certain diameter ranges of the cross-wound coil. For example, it may be advantageous to wind the thread in the lower diameter range with a slightly higher thread tension in order to improve the stability of the cross-wound bobbin.
  • the invention can just as easily be used on winding machines.
  • the length of the already wound thread can be calculated on the winder from the winding speed, which results from the addition of the vectors of the peripheral speed and the traversing speed.
  • the thread tension can be regulated by a thread brake, so that when changing the traversing speed to change the pitch angle, a simultaneous adjustment of the peripheral speed of the winding roller is not essential.
  • the thread speed can be detected, for example, by a non-contact speed sensor arranged in front of the winding station.
  • the calculation of the coil diameter based on the length of the already wound thread can be done by a mathematical model is stored in the control of the textile machine or in its own control of the winding unit, which was determined on the basis of preliminary tests.
  • the mathematical model can be wound for a given thread with defined thread parameters, such as material, twist and fineness, known crossing angle and thread tension, and starting from the diameter of the sleeve the coil diameter is constantly measured and stored as a function of the length of the wound thread.
  • the coil diameter can then be calculated on each winding station of the textile machine on the basis of the length of the already wound thread, without that thereby further measurements of the diameter are required. It may be advantageous that in calculating the coil diameter, the yarn tension and / or the crossing angle with which the thread was wound, is taken into account. The accuracy of the mathematical model can be increased if the thread tension and the crossing angle can also be considered as variables. In a further embodiment of the invention, it may be advantageous for a reference measurement of the coil diameter to be carried out at specific time intervals in order to correct the calculated value of the coil diameter.
  • the variables used for the calculation of the coil diameter are subject to tolerances, so that the calculated coil diameter may deviate from the actual value. These inaccuracies can be compensated by a reference measurement of the coil diameter.
  • the actually measured value of the coil diameter can be used as a new starting basis for the further calculations of the coil diameter, so that the tolerance-related errors of the calculated coil diameter are not unduly large.
  • a reference measurement of the coil diameter can be carried out by a common sensor for measuring at several winding stations. The sensor can be delivered to the winding stations successively and is advantageously arranged on a carriage which can be moved along the textile machine. There is only one sensor necessary for the entire textile machine, so that the construction of the Spooling without its own diameter sensor is still very easy.
  • the sensor can measure the bobbin diameter of the cross-wound bobbin in a different and arbitrary manner.
  • the sensor can be fed directly to, for example, a cross-wound bobbin and contactlessly scan the diameter of the cross-wound bobbin.
  • the determination of the coil diameter can also be done indirectly by the sensor is deliverable to a coil frame for receiving a sleeve of the cross-wound bobbin. By mechanical or optical scanning of the position of the creel above the winding roller, the bobbin diameter can be calculated.
  • FIGS. 1 and 2 is to be recognized only partially and very schematically shown spinning machine.
  • a yarn 2 produced in a spinning unit 1 is withdrawn from the spinning unit 1 by a pair of delivery rollers 3, 4 and fed to a winding unit 5 at a delivery speed v 1, where it is wound onto a cross-wound bobbin 6.
  • the spinning unit 1 can be arbitrary per se and be formed for example by an air spinning device or an open-end spinning device. The production of a thread in such spinning units is known per se and need not be explained in detail.
  • the delivery roller 3 of the delivery roller pair 3, 4 is by a Driven drive 7 and transported the clamped between the feed rollers 3 and 4 thread with the most constant delivery speed v 1 to ensure a uniform yarn formation in the spinning unit 1.
  • the thread 2 passes from the pair of delivery rollers 3, 4 via a stationary yarn guide 8 and a traversable in the direction of the double arrow B yarn guide 9 to the cheese package 6.
  • the cross-wound bobbin 6 consists of a sleeve 10 and a cylindrical or conical package 11, by the layer on the sleeve 10 wound yarn 2 is formed.
  • the sleeve 10 is freely rotatably held in a coil frame 12 and the cross-wound bobbin 6 lies with its outer peripheral surface on a winding roller 13.
  • the creel 12 is pivotally mounted on an axis 14 and, where appropriate, the coil frame 12 may be associated in a manner not shown strain means that enhance the pressure of the cross-wound bobbin 6 to the winding roller 13.
  • the winding roller 13 is driven by a drive 15 for rotation.
  • the cross-wound bobbin 6 rotates at the peripheral speed v 2 of the winding roller 13. Since the bobbin diameter D of the cross-wound bobbin 6 increases with the amount of the wound yarn 2, the speed of the cross-wound bobbin 6 changes at a given peripheral speed v 2 .
  • the yarn guide 9 changing in direction B serves to lay the yarn 2 to be wound up in the axial direction of the cross-wound bobbin while the cross-wound bobbin 6 is driven by the winding roller 13 for rotation.
  • the yarn 2 is thereby wound helically with a pitch angle ⁇ on the cross-wound bobbin 6.
  • the yarn guide 9 moves with a traversing speed v 3 , by the change of the pitch angle ⁇ is variable.
  • FIG. 3 illustrated addition of the vectors of the peripheral speed v 2 and the traversing speed v 3 , which are perpendicular to each other, we obtain the resulting winding speed v 4 , with which the thread 2 runs onto the cross-wound bobbin 6.
  • the yarn guide 9 is shown in the example shown here as attached to a pivot lever 16 eyelet and can be reciprocated over the associated with the pivot lever 16 drive 17 in traversing B axially to the cross-wound bobbin.
  • the embodiment of the yarn guide 9 and its drive are merely exemplary and can just as well be designed differently.
  • the yarn guide 9 can also be formed by two counter-rotating impellers, which move the yarn in traversing B.
  • the drive 17 of the thread guide 9 and the drive 15 of the winding roller 13 are connected to a controller 18.
  • the controller 18 controls the drives 15 and 17 so that the desired circumferential speed v 2 and traversing speed v 3 are present.
  • the controller 18 is also connected to the drive 7 of the delivery roller pair 3, 4. If the controller 18 does not control the drive 7, it receives at least information about the delivery speed v 1 of the delivery roller pair 3, 4.
  • the winding speed v 4 At a constant delivery speed v 1 , it is important that the winding speed v 4 also remains substantially constant.
  • the winding speed v 4 may differ slightly from the delivery speed v 1 in order to ensure a certain yarn tension of the yarn 2.
  • the peripheral speed v 2 and the traversing speed v 3 can be controlled so that the pitch angle ⁇ is variable and the winding speed v 4 remains constant.
  • FIG. 3 an example is shown in which the pitch angle ⁇ is to be increased to a larger pitch angle ⁇ '.
  • the circumferential velocity v 2 'and 2 reduced the traversing speed v to v 3' to the value of v increases.
  • the pitch angle ⁇ is selected as a function of the coil diameter D in order to produce a cross-wound bobbin 6 with defined properties.
  • the bobbin diameter D is calculated on the basis of the length of the already wound thread 2.
  • a mathematical model is deposited, with which the coil diameter D can be calculated based on the length of the already wound yarn 2.
  • a common sensor 19 for measuring the coil diameter D at a plurality of winding units 5 is provided.
  • a plurality of spinning units 1 and the associated winding units 5 is arranged side by side in the spinning machine on a spinning machine.
  • Conventional spinning machines contain several hundred spinning units 1 side by side, which each generate a thread 2 at the same time.
  • a movable in the longitudinal direction of the spinning machine 20 is arranged, the individual winding units 5 and the spinning units 1 is deliverable.
  • the carriage 20 may be, for example, a service trolley, which serves to remedy yarn breaks in the spinning unit 1 and / or to replace a full cross-wound bobbin 6 against an empty sleeve 10.
  • the sensor 19 On the carriage 20, the sensor 19 is arranged.
  • the sensor 19 measures the bobbin diameter D of the cross-wound bobbin 6 at that winding station 5 at which the carriage 20 just passes.
  • the sensor 19 may, for example, as shown by the dashed arrow 21st is indicated directly scan the surface of the package 11 and determine therefrom the coil diameter D.
  • the senor 19 determines the bobbin diameter D when the carriage 20 stops at a spinning unit in order to fix a thread break there.
  • the senor 19 scans the position of the coil frame 12, as indicated by the dashed arrow 22.
  • the scanning of the position of the coil frame 12 is an indirect measure of the coil diameter D.
  • control measurement of the coil diameter D by the sensor 19 can be corrected in the controller 18 calculated value of the coil diameter D.
  • the diameter value determined during the reference measurement can be used as the basis for further calculation of the coil diameter at this winding station, so that the calculated value is much more accurate.
  • the mathematical model stored in the controller 18 for calculating the coil diameter D is improved and optimized by each measured coil diameter D. As a result, the accuracy of the diameter calculation at all winding units 5 can be improved.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Herstellen von Kreuzwickelspulen an einer Spulstelle einer Textilmaschine, bei dem der Steigungswinkel des aufgewickelten Fadens während des Aufwickelns verändert wird. Die Vorrichtung enthält einen Antrieb zur Rotation der Kreuzwickelspule und an jeder Spulstelle einen variabel antreibbaren Fadenführer zum Verlegen eines aufzuwickelnden Fadens in axialer Richtung der Kreuzwickelspule unter veränderbarem Steigungswinkel.The invention relates to a method and an apparatus for producing cross wound packages at a winding station of a textile machine, in which the pitch angle of the wound thread is changed during winding. The device includes a drive for rotating the cross-wound bobbin and at each winding station a variably drivable yarn guide for laying a wound thread in the axial direction of the cheese package under variable pitch angle.

An Stelle des Steigungswinkels wird oftmals auch der sogenannte Kreuzungswinkel verwendet. Der Wert des Kreuzungswinkels entspricht dem doppelten Wert des Steigungswinkels.Instead of the pitch angle often the so-called crossing angle is used. The value of the crossing angle is twice the value of the pitch angle.

Aus der DE 103 42 266 A1 ist ein Verfahren und eine Vorrichtung der eingangs genannten Art Stand der Technik. Ziel der DE 103 42 266 A1 ist die Herstellung einer Kreuzwickelspule mit einem harten Kern bzw. einer hohen Dichte im inneren Bereich und einer geringen Dichte im äußeren Bereich. Hierzu wird der Faden zu Beginn der Spulenreise mit einem kleinen Steigungswinkel aufgewickelt und der Steigungswinkel während der Spulenreise kontinuierlich oder in kleinen Stufen vergrößert. Es ist nichts darüber erwähnt, wie die Vergrößerung ausgewählt wird und ob oder wie die Vergrößerung veränderbar ist. Die gemäß des Verfahrens der DE 103 42 266 A1 gebildete Kreuzwickelspule weist eine wilde Wicklung auf, da sich das sogenannte Windungsverhältnis während des Aufwickelns ständig verändert. Das Windungsverhältnis ist definiert als die Anzahl der Umdrehungen der Kreuzwickelspule während eines Doppelhubes des Fadenführers über die Breite der Kreuzwickelspule. Es besteht also grundsätzlich die Gefahr, dass das Windungsverhältnis ganzzahlige Werte annimmt und sogenannte Bildwickelzonen entstehen, die das Ablaufverhalten der Kreuzwickelspule äußerst negativ beeinflussen. Es wird dementsprechend zusätzlich eine Einrichtung vorhanden sein müssen, die das Entstehen der Bildwickelzonen verhindert. Hierzu sind der Offenlegungsschrift keine Angaben zu entnehmen.From the DE 103 42 266 A1 is a method and an apparatus of the type mentioned in the prior art. goal of DE 103 42 266 A1 is the production of a cross-wound coil with a hard core or a high density in the inner region and a low density in the outer region. For this purpose, the thread is wound at the beginning of the coil travel with a small pitch angle and increases the pitch angle during the coil travel continuously or in small steps. Nothing is mentioned about how the magnification is selected and whether or how the magnification is changeable. The according to the method of DE 103 42 266 A1 formed Kreuzwickelspule has a wild winding, since the so-called Windungsverhältnis constantly changes during winding. The turns ratio is defined as the number of turns of the cross-wound bobbin during a double stroke of the thread guide across the width of the cross-wound bobbin. Thus, there is a fundamental risk that the turns ratio assumes integer values and so-called image winding zones arise, which have a very negative influence on the runnability of the cross-wound bobbin. It will Accordingly, in addition, a device must be present, which prevents the formation of the Bildwickelzonen. For this purpose, the disclosure is no information to be taken.

Aus der WO 2004/101415 ist auch ein Verfahren und eine Vorrichtung der eingangs genannten Art bekannt.From the WO 2004/101415 is also known a method and a device of the type mentioned.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zum Herstellen von Kreuzwickelspulen zu verbessern.The invention has for its object to improve a method and an apparatus for producing cross-wound bobbins.

Die Aufgabe wird beim Verfahren mit den Merkmalen des Anspruchs 1 sowie bei der Vorrichtung mit den Merkmalen des Anspruchs 4 gelöst.The object is achieved in the method with the features of claim 1 and in the device with the features of claim 4.

Die Erfindung hat den Vorteil, dass der Spulendurchmesser zu jeder Zeit bekannt ist. Bei den bekannten Vorrichtungen ließ sich dies bislang nur dadurch erreichen, dass an jeder Spulstelle ein eigener Sensor vorhanden war, der den Spulendurchmesser gemessen hat. Durch die vorliegende Erfindung lässt sich dieser Durchmessersensor an jeder Spulstelle einsparen.
Dadurch dass der Spulendurchmesser stets bekannt ist, lässt sich mit Hilfe der ebenfalls bekannten Umfangsgeschwindigkeit der Kreuzwickelspule die Spulendrehzahl und damit auch das momentan vorliegende Windungsverhältnis berechnen. Die Kreuzwickelspule wird an ihrem Umfang über eine Wickelwalze angetrieben und rotiert demzufolge mit einer Umfangsgeschwindigkeit die im Wesentlichen der Umfangsgeschwindigkeit der Wickelwalze entspricht. Der Fadenführer zum Verlegen des aufzuwickelnden Fadens in axialer Richtung der Kreuzwickelspule ist mit einem geschwindigkeitsveränderbaren Antrieb versehen, der von der Steuerung gesteuert wird, so dass auch die Geschwindigkeit des Fadenführers bekannt ist. Daraus ist in der Steuerung das Windungsverhältnis berechenbar, so dass beim Herstellen der Kreuzwickelspule zu jeder Zeit das Windungsverhältnis bekannt ist.
Der bekannte Spulendurchmesser ermöglicht die gezielte Aufwicklung des Fadens immer mit dem optimalen Steigungswinkel. Es lassen sich Kreuzwickelspulen herstellen, die optimal an die nachfolgenden Verarbeitungsschritte angepasst sind. Beispielsweise lassen sich durch einen relativ großen Steigungswinkel bei kleinem Spulendurchmesser und sich mit dem Spulendurchmesser verringernden Steigungswinkel gute Ablaufeigenschaften der Kreuzwickelspule erreichen. Es lassen sich auch gezielt Kreuzwickelspulen mit hoher Dichte, die besonders für die Weiterverarbeitung in der Weberei geeignet sind oder Färbespulen mit besonders homogenem Spulenaufbau erzeugen.The invention has the advantage that the coil diameter is known at all times. In the case of the known devices, this could hitherto only be achieved by providing a separate sensor at each winding station which measured the coil diameter. By the present invention, this diameter sensor can be saved at each winding station.
The fact that the bobbin diameter is always known, can be calculated with the help of the well-known peripheral speed of the cross-wound bobbin, the coil speed and thus also the currently present turns ratio. The cross-wound bobbin is driven at its circumference via a winding roller and consequently rotates at a peripheral speed substantially equal to the peripheral speed of the winding roller. The thread guide for laying the thread to be wound in the axial direction of the cheese package is provided with a variable speed drive, which is controlled by the controller, so that the speed of the thread guide is known. From this, the turns ratio can be calculated in the controller so that the turns ratio is known at all times when the cross-wound bobbin is produced.
The known coil diameter allows the targeted winding of the thread always with the optimum pitch angle. It can produce cross-wound bobbins, which are optimally adapted to the subsequent processing steps. For example, good flow properties of the cross-wound bobbin can be achieved by a relatively large pitch angle with a small bobbin diameter and with the bobbin diameter decreasing pitch angle. It can also be targeted cross winding coils with high density, the are particularly suitable for further processing in the weaving or produce dyeing bobbins with a particularly homogeneous coil structure.

Bei der Herstellung von Kreuzwickelspulen mit wilder Wicklung kann das Aufwickeln des Fadens mit einem unerwünschten Windungsverhältnis, bei dem Bildwickelzonen auftreten, zuverlässig verhindert werden, da das Windungsverhältnis kurz vor dem Auftreten eines unerwünschten Wertes über eine Variation des Steigungswinkels durch Veränderung der Fadenführergeschwindigkeit angepasst werden kann.In the manufacture of cross-winding coils with a wild winding, the winding of the thread with an undesirable turn ratio at which image winding zones occur can be reliably prevented because the turn ratio can be adjusted just before the occurrence of an undesirable value by varying the pitch angle by changing the thread guide speed.

Außerdem ist es möglich, mit sehr geringem Aufwand Kreuzwickelspulen mit Stufenpräzisionswicklung herzustellen, bei denen das Windungsverhältnis über gewisse Durchmesserbereich konstant gehalten ist.In addition, it is possible to produce cross winding coils with step precision winding, with very little effort, in which the turns ratio is kept constant over a certain diameter range.

Die Erfindung ist insbesondere für Spinnmaschinen geeignet, bei denen der Faden mit einer bekannten Liefergeschwindigkeit, die üblicherweise konstant ist, geliefert wird. Die Länge des aufgewickelten Fadens ist für die Steuerung unmittelbar aus der bekannten Liefergeschwindigkeit bestimmbar. Damit bei konstanter Liefergeschwindigkeit der Faden mit konstanter Fadenzugspannung aufgewickelt wird, ist es erforderlich, dass bei der Veränderung der Changiergeschwindigkeit des Fadenführers zum Verändern des Steigungswinkels gleichzeitig die Umfangsgeschwindigkeit der Wickelwalze gegenläufig verändert wird, so dass die resultierende Aufspulgeschwindigkeit konstant bleibt. Dadurch, dass der Spulendurchmesser in der Steuerung bekannt ist, kann es auch vorgesehen sein, dass die Fadenspannung in gewissen Durchmesserbereichen der Kreuzwickelspule optimiert wird. Beispielsweise kann es vorteilhaft sein, den Faden im unteren Durchmesserbereich mit einer etwas höheren Fadenspannung aufzuwickeln, um die Stabilität der Kreuzwickelspule zu verbessern.The invention is particularly suitable for spinning machines in which the yarn is supplied at a known delivery speed, which is usually constant. The length of the wound thread can be determined directly from the known delivery speed for the control. In order for the yarn to be wound up with a constant yarn tension at a constant delivery speed, it is necessary for the peripheral speed of the winding roller to be changed in opposite directions during the change in the traversing speed of the yarn guide for changing the pitch angle, so that the resulting winding speed remains constant. Because the coil diameter is known in the control, it can also be provided that the thread tension is optimized in certain diameter ranges of the cross-wound coil. For example, it may be advantageous to wind the thread in the lower diameter range with a slightly higher thread tension in order to improve the stability of the cross-wound bobbin.

Die Erfindung ist genauso gut auch an Spulmaschinen einsetzbar. Die Länge des bereits aufgewickelten Fadens kann an der Spulmaschine aus der Aufspulgeschwindigkeit errechnet werden, die sich aus der Addition der Vektoren der Umfangsgeschwindigkeit und der Changiergeschwindigkeit ergibt. An einer Spulmaschine kann die Fadenspannung durch eine Fadenbremse reguliert werden, so dass bei Veränderung der Changiergeschwindigkeit zur Veränderung des Steigungswinkels eine gleichzeitige Anpassung der Umfangsgeschwindigkeit der Wickelwalze nicht unbedingt erforderlich ist.The invention can just as easily be used on winding machines. The length of the already wound thread can be calculated on the winder from the winding speed, which results from the addition of the vectors of the peripheral speed and the traversing speed. On a winding machine, the thread tension can be regulated by a thread brake, so that when changing the traversing speed to change the pitch angle, a simultaneous adjustment of the peripheral speed of the winding roller is not essential.

Zur Steigerung der Genauigkeit bei der Bestimmung der Länge des aufgewickelten Fadens kann es vorteilhaft sein, die Geschwindigkeit des aufgewickelten Fadens direkt zu messen. Die Fadengeschwindigkeit kann beispielsweise durch einen vor der Spulstelle angeordneten berührungslosen Geschwindigkeitssensor erfasst werden.
Die Berechnung des Spulendurchmessers anhand der Länge des bereits aufgewickelten Fadens kann dadurch erfolgen, dass in der Steuerung der Textilmaschine oder in einer eigenen Steuerung der Spulstelle ein mathematisches Modell hinterlegt ist, das anhand von Vorversuchen ermittelt wurde. Das mathematische Modell kann für einen gegebenen Faden mit definierten Fadenparametern, wie beispielsweise Material, Drehung und Feinheit, mit bekanntem Kreuzungswinkel und bekannter Fadenzugspannung aufgewickelt wird und wobei ausgehend vom Durchmesser der Hülse der Spulendurchmesser ständig gemessen und als Funktion der Länge des aufgewickelten Fadens gespeichert wird. Anhand dieses in der Steuerung gespeicherten mathematischen Modells kann dann an jeder Spulstelle der Textilmaschine der Spulendurchmesser anhand der Länge des bereits aufgewickelten Fadens berechnet werden, ohne
dass dabei weitere Messungen des Durchmessers erforderlich sind. Es kann vorteilhaft sein, dass bei der Berechnung des Spulendurchmessers die Fadenzugspannung und/oder der Kreuzungswinkel, mit dem der Faden aufgewickelt wurde, berücksichtigt wird. Die Genauigkeit des mathematischen Modells kann gesteigert werden, wenn die Fadenzugspannung und der Kreuzungswinkel ebenfalls als Variablen berücksichtigt werden können.
In weiterer Ausgestaltung der Erfindung kann es vorteilhaft sein, dass in bestimmten Zeitabständen eine Referenzmessung des Spulendurchmessers durchgeführt wird, um den berechneten Wert des Spulendurchmessers zu korrigieren. Die für die Berechnung des Spulendurchmessers herangezogenen Variablen, wie die Länge des aufgewickelten Fadens, sind toleranzbehaftet, so dass der berechnete Spulendurchmesser von dem tatsächlichen Wert abweichen kann. Diese Ungenauigkeiten können durch eine Referenzmessung des Spulendurchmessers ausgeglichen werden. Der tatsächlich gemessene Wert des Spulendurchmessers kann als neue Ausgangsbasis für die weiteren Berechnungen des Spulendurchmessers verwendet werden, so dass die toleranzbehafteten Fehler des berechneten Spulendurchmessers nicht unzulässig groß werden. Eine Referenzmessung des Spulendurchmessers kann durch einen gemeinsamen Sensor zur Messung an mehreren Spulstellen durchgeführt werden. Der Sensor kann den Spulstellen nacheinander zustellbar sein und ist vorteilhafterweise an einem entlang der Textilmaschine verfahrbaren Wagen angeordnet. Es ist nur ein Sensor für die gesamte Textilmaschine notwendig, so dass der Aufbau der Spulstellen ohne eigenen Durchmessersensor immer noch sehr einfach ist. Es kann auch vorteilhaft sein, das mathematische Modell für die Berechnung des Spulendurchmessers anhand der Messwerte, die der Sensor liefert, anzupassen und zu optimieren. Die Präzision beim Aufbau der Kreuzwickelspule und die Übereinstimmung mit den gewünschten Eigenschaften der Kreuzwickelspule, wie zum Beispiel gutes Ablaufverhalten, kann dadurch weiter verbessert werden,To increase the accuracy in determining the length of the wound yarn, it may be advantageous to measure the speed of the wound yarn directly. The thread speed can be detected, for example, by a non-contact speed sensor arranged in front of the winding station.
The calculation of the coil diameter based on the length of the already wound thread can be done by a mathematical model is stored in the control of the textile machine or in its own control of the winding unit, which was determined on the basis of preliminary tests. The mathematical model can be wound for a given thread with defined thread parameters, such as material, twist and fineness, known crossing angle and thread tension, and starting from the diameter of the sleeve the coil diameter is constantly measured and stored as a function of the length of the wound thread. On the basis of this mathematical model stored in the controller, the coil diameter can then be calculated on each winding station of the textile machine on the basis of the length of the already wound thread, without
that thereby further measurements of the diameter are required. It may be advantageous that in calculating the coil diameter, the yarn tension and / or the crossing angle with which the thread was wound, is taken into account. The accuracy of the mathematical model can be increased if the thread tension and the crossing angle can also be considered as variables.
In a further embodiment of the invention, it may be advantageous for a reference measurement of the coil diameter to be carried out at specific time intervals in order to correct the calculated value of the coil diameter. The variables used for the calculation of the coil diameter, such as the length of the wound thread, are subject to tolerances, so that the calculated coil diameter may deviate from the actual value. These inaccuracies can be compensated by a reference measurement of the coil diameter. The actually measured value of the coil diameter can be used as a new starting basis for the further calculations of the coil diameter, so that the tolerance-related errors of the calculated coil diameter are not unduly large. A reference measurement of the coil diameter can be carried out by a common sensor for measuring at several winding stations. The sensor can be delivered to the winding stations successively and is advantageously arranged on a carriage which can be moved along the textile machine. There is only one sensor necessary for the entire textile machine, so that the construction of the Spooling without its own diameter sensor is still very easy. It may also be advantageous to adapt and optimize the mathematical model for the calculation of the coil diameter based on the measured values supplied by the sensor. The precision in the construction of the cross-wound bobbin and the conformity with the desired characteristics of the cross-wound bobbin, such as good drainage behavior, can be further improved thereby,

Der Sensor kann den Spulendurchmesser der Kreuzwickelspule in unterschiedlicher und an sich beliebiger Weise messen. Der Sensor kann beispielsweise einer Kreuzwickelspule direkt zustellbar sein und berührungslos den Durchmesser der Kreuzwickelspule abtasten. Die Bestimmung des Spulendurchmessers kann jedoch auch indirekt erfolgen, indem der Sensor einem Spulenrahmen zur Aufnahme einer Hülse der Kreuzwickelspule zustellbar ist. Durch mechanische oder optische Abtastung der Position des Spulenrahmens oberhalb der Wickelwalze kann der Spulendurchmesser berechnet werden.The sensor can measure the bobbin diameter of the cross-wound bobbin in a different and arbitrary manner. The sensor can be fed directly to, for example, a cross-wound bobbin and contactlessly scan the diameter of the cross-wound bobbin. However, the determination of the coil diameter can also be done indirectly by the sensor is deliverable to a coil frame for receiving a sleeve of the cross-wound bobbin. By mechanical or optical scanning of the position of the creel above the winding roller, the bobbin diameter can be calculated.

Weitere Vorteile und Merkmale der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels.Further advantages and features of the invention will become apparent from the following description of an embodiment.

Es zeigen:

Figur 1
eine sehr schematisch dargestellte Seitenansicht einer Spinnmaschine im Bereich einer Spulstelle,
Figur 2
eine Frontansicht der Spinnmaschine der Figur 1 mit mehreren nebeneinander angeordneten Spulstellen,
Figur 3
eine Darstellung von Geschwindigkeitsvektoren.
Show it:
FIG. 1
a very schematically illustrated side view of a spinning machine in the region of a winding unit,
FIG. 2
a front view of the spinning machine the FIG. 1 with several juxtaposed winding units,
FIG. 3
a representation of velocity vectors.

In den Figuren 1 und 2 ist eine nur teilweise und sehr schematisch dargestellte Spinnmaschine zu erkennen. Ein in einer Spinneinheit 1 erzeugter Faden 2 wird durch ein Lieferwalzenpaar 3, 4 aus der Spinneinheit 1 abgezogen und mit einer Liefergeschwindigkeit v1 einer Spulstelle 5 zugeführt und dort auf eine Kreuzwickelspule 6 aufgewickelt. Die Spinneinheit 1 kann an sich beliebig sein und beispielsweise durch eine Luftspinnvorrichtung oder eine Offenend-Spinnvorrichtung gebildet werden. Die Erzeugung eines Fadens in derartigen Spinneinheiten ist an sich bekannt und braucht nicht näher erläutert zu werden. Die Lieferwalze 3 des Lieferwalzenpaares 3, 4 ist durch einen Antrieb 7 antreibbar und transportiert den zwischen den Lieferwalzen 3 und 4 geklemmten Faden mit möglichst konstanter Liefergeschwindigkeit v1, um eine gleichmäßige Garnbildung in der Spinneinheit 1 zu gewährleisten. Der Faden 2 gelangt vom Lieferwalzenpaar 3, 4 über einen stationären Fadenführer 8 und einen in Richtung des Doppelpfeiles B changierbaren Fadenführer 9 zu der Kreuzwickelspule 6. Die Kreuzwickelspule 6 besteht aus einer Hülse 10 und einem zylindrischen oder konischen Garnkörper 11, der durch den lagenweise auf der Hülse 10 aufgewickelten Faden 2 gebildet wird. Die Hülse 10 ist frei drehbar in einem Spulenrahmen 12 gehalten und die Kreuzwickelspule 6 liegt mit ihrer äußeren Umfangsfläche auf einer Wickelwalze 13 auf. Der Spulenrahmen 12 ist auf einer Achse 14 schwenkbar gelagert und gegebenenfalls können dem Spulenrahmen 12 in nicht dargestellter Weise Belastungseinrichtungen zugeordnet sein, die den Andruck der Kreuzwickelspule 6 an die Wickelwalze 13 verstärken. Die Wickelwalze 13 wird von einem Antrieb 15 zur Rotation angetrieben. Die Kreuzwickelspule 6 rotiert mit der Umfangsgeschwindigkeit v2 der Wickelwalze 13. Da der Spulendurchmesser D der Kreuzwickelspule 6 mit der Menge des aufgewickelten Fadens 2 zunimmt, ändert sich bei gegebener Umfangsgeschwindigkeit v2 die Drehzahl der Kreuzwickelspule 6.In the FIGS. 1 and 2 is to be recognized only partially and very schematically shown spinning machine. A yarn 2 produced in a spinning unit 1 is withdrawn from the spinning unit 1 by a pair of delivery rollers 3, 4 and fed to a winding unit 5 at a delivery speed v 1, where it is wound onto a cross-wound bobbin 6. The spinning unit 1 can be arbitrary per se and be formed for example by an air spinning device or an open-end spinning device. The production of a thread in such spinning units is known per se and need not be explained in detail. The delivery roller 3 of the delivery roller pair 3, 4 is by a Driven drive 7 and transported the clamped between the feed rollers 3 and 4 thread with the most constant delivery speed v 1 to ensure a uniform yarn formation in the spinning unit 1. The thread 2 passes from the pair of delivery rollers 3, 4 via a stationary yarn guide 8 and a traversable in the direction of the double arrow B yarn guide 9 to the cheese package 6. The cross-wound bobbin 6 consists of a sleeve 10 and a cylindrical or conical package 11, by the layer on the sleeve 10 wound yarn 2 is formed. The sleeve 10 is freely rotatably held in a coil frame 12 and the cross-wound bobbin 6 lies with its outer peripheral surface on a winding roller 13. The creel 12 is pivotally mounted on an axis 14 and, where appropriate, the coil frame 12 may be associated in a manner not shown strain means that enhance the pressure of the cross-wound bobbin 6 to the winding roller 13. The winding roller 13 is driven by a drive 15 for rotation. The cross-wound bobbin 6 rotates at the peripheral speed v 2 of the winding roller 13. Since the bobbin diameter D of the cross-wound bobbin 6 increases with the amount of the wound yarn 2, the speed of the cross-wound bobbin 6 changes at a given peripheral speed v 2 .

Der in Richtung B changierende Fadenführer 9 dient zum Verlegen des aufzuwickelnden Fadens 2 in axialer Richtung der Kreuzwickelspule während die Kreuzwickelspule 6 von der Wickelwalze 13 zur Rotation angetrieben wird. Der Faden 2 wird dadurch mit einem Steigungswinkel α auf der Kreuzwickelspule 6 schraubenlinienförmig aufgewickelt. Der Fadenführer 9 bewegt sich mit einer Changiergeschwindigkeit v3, durch deren Veränderung der Steigungswinkel α veränderbar ist. Durch die in Figur 3 dargestellte Addition der Vektoren der Umfangsgeschwindigkeit v2 und der Changiergeschwindigkeit v3, die senkrecht zueinander stehen, erhält man die resultierende Aufspulgeschwindigkeit v4, mit der der Faden 2 auf die Kreuzwickelspule 6 aufläuft.The yarn guide 9 changing in direction B serves to lay the yarn 2 to be wound up in the axial direction of the cross-wound bobbin while the cross-wound bobbin 6 is driven by the winding roller 13 for rotation. The yarn 2 is thereby wound helically with a pitch angle α on the cross-wound bobbin 6. The yarn guide 9 moves with a traversing speed v 3 , by the change of the pitch angle α is variable. By the in FIG. 3 illustrated addition of the vectors of the peripheral speed v 2 and the traversing speed v 3 , which are perpendicular to each other, we obtain the resulting winding speed v 4 , with which the thread 2 runs onto the cross-wound bobbin 6.

Der Fadenführer 9 ist in dem hier dargestellten Beispiel als an einem Schwenkhebel 16 angebrachte Öse dargestellt und kann über den mit dem Schwenkhebel 16 verbundenen Antrieb 17 in Changierrichtung B axial zur Kreuzwickelspule hin- und herbewegt werden. Die Ausgestaltung des Fadenführers 9 und sein Antrieb sind jedoch lediglich beispielhaft und können genauso gut auch anders gestaltet sein. Beispielsweise kann der Fadenführer 9 auch durch zwei gegenläufig rotierende Flügelräder gebildet werden, die den Faden in Changierrichtung B verlegen.The yarn guide 9 is shown in the example shown here as attached to a pivot lever 16 eyelet and can be reciprocated over the associated with the pivot lever 16 drive 17 in traversing B axially to the cross-wound bobbin. However, the embodiment of the yarn guide 9 and its drive are merely exemplary and can just as well be designed differently. For example, the yarn guide 9 can also be formed by two counter-rotating impellers, which move the yarn in traversing B.

Der Antrieb 17 des Fadenführers 9 und der Antrieb 15 der Wickelwalze 13 sind mit einer Steuerung 18 verbunden. Die Steuerung 18 steuert die Antriebe 15 und 17 so, dass die gewünschte Umfangsgeschwindigkeit v2 und Changiergeschwindigkeit v3 vorliegen. Die Steuerung 18 ist ebenfalls mit dem Antrieb 7 des Lieferwalzenpaares 3, 4 verbunden. Wenn die Steuerung 18 den Antrieb 7 nicht steuert, so erhält sie wenigstens eine Information über die Liefergeschwindigkeit v1 des Lieferwalzenpaares 3, 4.The drive 17 of the thread guide 9 and the drive 15 of the winding roller 13 are connected to a controller 18. The controller 18 controls the drives 15 and 17 so that the desired circumferential speed v 2 and traversing speed v 3 are present. The controller 18 is also connected to the drive 7 of the delivery roller pair 3, 4. If the controller 18 does not control the drive 7, it receives at least information about the delivery speed v 1 of the delivery roller pair 3, 4.

Bei konstanter Liefergeschwindigkeit v1 ist es wichtig, dass auch die Aufspulgeschwindigkeit v4 im Wesentlichen konstant bleibt. Die Aufspulgeschwindigkeit v4 kann sich leicht von der Liefergeschwindigkeit v1 unterscheiden, um eine gewisse Fadenzugspannung des Fadens 2 zu gewährleisten. Mit Hilfe der Steuerung 18 kann die Umfangsgeschwindigkeit v2 und die Changiergeschwindigkeit v3 so gesteuert werden, dass der Steigungswinkel α veränderbar ist, und die Aufspulgeschwindigkeit v4 dabei konstant bleibt. In Figur 3 ist ein Beispiel dargestellt, bei dem der Steigungswinkel α auf einen größeren Steigungswinkel α' vergrößert werden soll. Hierzu wird die Umfangsgeschwindigkeit v2 auf den Wert v'2 verkleinert und die Changiergeschwindigkeit v3 auf den Wert v'3 vergrößert.At a constant delivery speed v 1 , it is important that the winding speed v 4 also remains substantially constant. The winding speed v 4 may differ slightly from the delivery speed v 1 in order to ensure a certain yarn tension of the yarn 2. With the aid of the controller 18, the peripheral speed v 2 and the traversing speed v 3 can be controlled so that the pitch angle α is variable and the winding speed v 4 remains constant. In FIG. 3 an example is shown in which the pitch angle α is to be increased to a larger pitch angle α '. For this purpose, the circumferential velocity v 2 'and 2 reduced the traversing speed v to v 3' to the value of v increases. 3

Erfindungsgemäß ist vorgesehen, dass der Steigungswinkel α in Abhängigkeit des Spulendurchmessers D gewählt wird, um eine Kreuzwickelspule 6 mit definierten Eigenschaften herzustellen. Der Spulendurchmesser D wird anhand der Länge des bereits aufgewickelten Fadens 2 berechnet. In der Steuerung 18 ist hierzu ein mathematisches Modell hinterlegt, mit dem der Spulendurchmesser D anhand der Länge des bereits aufgewickelten Fadens 2 berechenbar ist.According to the invention, it is provided that the pitch angle α is selected as a function of the coil diameter D in order to produce a cross-wound bobbin 6 with defined properties. The bobbin diameter D is calculated on the basis of the length of the already wound thread 2. In the controller 18 for this purpose, a mathematical model is deposited, with which the coil diameter D can be calculated based on the length of the already wound yarn 2.

Zur Steigerung der Genauigkeit ist ein gemeinsamer Sensor 19 zur Messung des Spulendurchmessers D an mehreren Spulstellen 5 vorgesehen. Wie in Figur 2 erkennbar, ist an einer Spinnmaschine eine Vielzahl von Spinneinheiten 1 und die zugehörigen Spulstellen 5 nebeneinander in der Spinnmaschine angeordnet. Übliche Spinnmaschinen enthalten mehrere hundert Spinneinheiten 1 nebeneinander, die gleichzeitig jeweils einen Faden 2 erzeugen. An der Spinnmaschine ist ein in Längsrichtung der Spinnmaschine verfahrbarer Wagen 20 angeordnet, der einzelnen Spulstellen 5 bzw. den Spinneinheiten 1 zustellbar ist. Der Wagen 20 kann beispielsweise ein Wartungswagen sein, der zur Beheben von Fadenbrüchen in der Spinneinheit 1 und/oder zum Auswechseln einer vollen Kreuzwickelspule 6 gegen eine leere Hülse 10 dient. An dem Wagen 20 ist der Sensor 19 angeordnet. Der Sensor 19 misst den Spulendurchmesser D der Kreuzwickelspule 6 an derjenigen Spulstelle 5 an der der Wagen 20 gerade vorüberfährt. Der Sensor 19 kann dabei beispielsweise wie es durch den gestrichelt dargestellten Pfeil 21 angedeutet ist, direkt die Oberfläche des Garnkörpers 11 abtasten und daraus den Spulendurchmesser D bestimmen.To increase the accuracy of a common sensor 19 for measuring the coil diameter D at a plurality of winding units 5 is provided. As in FIG. 2 can be seen, a plurality of spinning units 1 and the associated winding units 5 is arranged side by side in the spinning machine on a spinning machine. Conventional spinning machines contain several hundred spinning units 1 side by side, which each generate a thread 2 at the same time. At the spinning machine a movable in the longitudinal direction of the spinning machine 20 is arranged, the individual winding units 5 and the spinning units 1 is deliverable. The carriage 20 may be, for example, a service trolley, which serves to remedy yarn breaks in the spinning unit 1 and / or to replace a full cross-wound bobbin 6 against an empty sleeve 10. On the carriage 20, the sensor 19 is arranged. The sensor 19 measures the bobbin diameter D of the cross-wound bobbin 6 at that winding station 5 at which the carriage 20 just passes. The sensor 19 may, for example, as shown by the dashed arrow 21st is indicated directly scan the surface of the package 11 and determine therefrom the coil diameter D.

Alternativ kann auch vorgesehen sein, dass der Sensor 19 den Spulendurchmesser D bestimmt, wenn der Wagen 20 an einer Spinneinheit anhält, um dort einen Fadenbruch zu beheben.Alternatively, it can also be provided that the sensor 19 determines the bobbin diameter D when the carriage 20 stops at a spinning unit in order to fix a thread break there.

Es kann beispielsweise vorteilhaft sein, dass der Sensor 19 die Position des Spulenrahmens 12 abtastet, wie es durch den gestrichelt dargestellten Pfeil 22 angedeutet ist. Die Abtastung der Position des Spulenrahmens 12 ist ein indirektes Maß für den Spulendurchmesser D. Die Abtastung des Spulen rahmens 12 kann beispielsweise mechanisch über einen Hebel oder auch optisch berührungslos geschehen.It may be advantageous, for example, that the sensor 19 scans the position of the coil frame 12, as indicated by the dashed arrow 22. The scanning of the position of the coil frame 12 is an indirect measure of the coil diameter D. The scanning of the coil frame 12, for example, mechanically done via a lever or optically contactless.

Durch die in gewissen Zeitabständen erfolgende Kontrollmessung des Spulendurchmessers D durch den Sensor 19 lässt sich der in der Steuerung 18 berechnete Wert des Spulendurchmessers D korrigieren. Der bei der Referenzmessung bestimmte Durchmesserwert kann an dieser Spulstelle der weiteren Berechnung des Spulendurchmesser zugrunde gelegt werden, so dass der berechnete Wert wesentlich genauer ist. Es kann auch vorgesehen sein, dass durch jeden gemessenen Spulendurchmesser D das in der Steuerung 18 hinterlegte mathematische Modell für die Berechnung des Spulendurchmessers D verbessert und optimiert wird. Dadurch lässt sich die Genauigkeit der Durchmesserberechnung an allen Spulstellen 5 verbessern. Durch die vorliegende Erfindung lassen sich sehr einfach und kostengünstig Kreuzwickelspulen 6 mit genau definierten Eigenschaften für die Weiterverarbeitung herstellen, ohne dass an jeder Spulstelle 5 ein Sensor 19 zur permanenten Erfassung des Spulendurchmessers D vorhanden ist.By taking place at certain intervals control measurement of the coil diameter D by the sensor 19 can be corrected in the controller 18 calculated value of the coil diameter D. The diameter value determined during the reference measurement can be used as the basis for further calculation of the coil diameter at this winding station, so that the calculated value is much more accurate. It can also be provided that the mathematical model stored in the controller 18 for calculating the coil diameter D is improved and optimized by each measured coil diameter D. As a result, the accuracy of the diameter calculation at all winding units 5 can be improved. By means of the present invention, it is possible to produce cross-wound bobbins 6 with precisely defined properties for further processing in a very simple and cost-effective manner, without a sensor 19 for permanently detecting the bobbin diameter D being present at each winding station 5.

Claims (9)

  1. A method for producing cross-wound bobbins (6) at a winding station (5) of a spinning machine or winding machine, the pitch angle of the wound thread (2) being modified during winding and the pitch angle (α) being selected as a function of the bobbin diameter (D), characterized in that a length of the already wound thread is calculated using the supply speed at the winding station of the spinning machine or using the winding speed at the winding station of the winding machine, and that the bobbin diameter is calculated using a mathematical model and based on the calculated length of the thread already wound.
  2. The method according to claim 1, characterized in that when calculating the bobbin diameter, the thread tension and/or the pitch angle at which the thread was wound is considered.
  3. The method according to claim 1 or 2, characterized in that a reference measurement of the bobbin diameter is performed in order to correct the calculated value of the bobbin diameter.
  4. A device for producing cross-wound bobbins (6) at a plurality of winding stations (5) of a spinning machine or a winding machine having a drive (13) for rotating the cross-wound bobbin (6) and having a variably driven thread guide (9) at each winding station (5) for laying a thread (2) to be wound in the axial direction of the cross-wound bobbin (6) at a changeable pitch angle α, said angle being selected as a function of the bobbin diameter, characterized in that a controller (18) is provided for calculating the bobbin diameter (D) from the length of the thread (2) already wound and is connected to the drive (17) of the thread guide (9), wherein a mathematical model is stored in the controller (18), a length of the thread already wound can be calculated by means of the controller (18) using the supply speed at the winding station of the spinning machine or winding machine, and the bobbin diameter can be calculated using a mathematical model and using the calculated length of the thread already wound
  5. The device according to claim 4, characterized in that a common sensor (19) is provided for measuring the bobbin diameter (D) at a plurality of winding stations (5).
  6. The device according to claim 5, characterized in that the sensor (19) can be positioned at the winding stations (5) one after the other.
  7. The device according to one of the claims 5 or 6, characterized in that the sensor (19) is disposed on a carriage (20) displaceable along the spinning machine or winding machine.
  8. The device according to any one of the claims 5 through 7, characterized in that the sensor (19) can be placed directly at a cross-wound bobbin (6).
  9. The device according to any one of the claims 5 through 7, characterized in that the sensor (19) can be placed next to a bobbin frame (12) for receiving a sleeve (10) of the cross-wound bobbin (6).
EP08871694.9A 2008-01-28 2008-10-17 Method and apparatus for producing cross-wound bobbins Active EP2238062B1 (en)

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DE102008008083A DE102008008083A1 (en) 2008-01-28 2008-01-28 Method and apparatus for making cross-wound packages
PCT/EP2008/008796 WO2009095043A1 (en) 2008-01-28 2008-10-17 Method and apparatus for producing cross-wound bobbins

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DE102008008083A1 (en) 2009-07-30
CN101970325B (en) 2013-04-03
JP5128679B2 (en) 2013-01-23
EP2238062A1 (en) 2010-10-13
US20100301155A1 (en) 2010-12-02
WO2009095043A1 (en) 2009-08-06
JP2011510884A (en) 2011-04-07

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