EP1249422B1 - Yarn clearing device in the winding station of a textile machine - Google Patents

Yarn clearing device in the winding station of a textile machine Download PDF

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Publication number
EP1249422B1
EP1249422B1 EP02003948A EP02003948A EP1249422B1 EP 1249422 B1 EP1249422 B1 EP 1249422B1 EP 02003948 A EP02003948 A EP 02003948A EP 02003948 A EP02003948 A EP 02003948A EP 1249422 B1 EP1249422 B1 EP 1249422B1
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EP
European Patent Office
Prior art keywords
yarn
thread
length
cleaning apparatus
measured values
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EP02003948A
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German (de)
French (fr)
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EP1249422B2 (en
EP1249422A2 (en
EP1249422A3 (en
Inventor
Andreas Krüger
Gerard Küsters
Christian Sturm
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Oerlikon Textile GmbH and Co KG
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Saurer GmbH and Co KG
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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
    • B65H61/00—Applications of devices for metering predetermined lengths of running material
    • B65H61/005—Applications of devices for metering predetermined lengths of running material for measuring speed of running yarns
    • 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
    • B65H63/06—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to presence of irregularities in running material, e.g. for severing the material at irregularities ; Control of the correct working of the yarn cleaner
    • 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
    • B65H63/06—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to presence of irregularities in running material, e.g. for severing the material at irregularities ; Control of the correct working of the yarn cleaner
    • B65H63/062—Electronic slub detector
    • 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 yarn cleaning device according to the Preamble of claim 1.
  • a quality matrix is created, in for example, the diameter deviation in percent and the error length is entered in millimeters.
  • this Matrix is set the desired degree of purification and the machine or the job specified.
  • the receives required values for determining the error length the cleaner for example by detecting the current Surface speed or the speed of the Drive roller, which by means of friction, the cheese in Rotation offset. Jobs with such Cleaners are, for example, from the CH 635 300 A5, from the DE 29 18 740 C2, from DE 39 11 505 A1 or the generic DE 196 40 184 A1 known.
  • the CH 669 779 A5 describes the length measurement of the current Yarns on spools producing cross-wound bobbins.
  • the Length measurement is carried out by means of an optical Correlator.
  • the length of the wound yarn are determined as accurately as possible to Example in the weaving preparation the rewinding of Residual coils or waste remaining on the coils To reduce or completely avoid yarn residues.
  • the yarn becomes for example, from a spinning cop to that of a Reel wound Reel wound reel.
  • Such Grooved drum is also called a drive roller with reverse thread designated.
  • a probe with built-in knife and a Control unit are used for electronic yarn cleaning.
  • the Length measuring device consists of a further probe, which contains an optical device and a preamplifier and from a counting and display unit, which all others Contains circuits. From the yarn cleaner or even one mechanical thread feeler as well as of the drive device of Cheese, the length measuring device receives the information that actually a yarn is spooled. This should be avoided be that in the Umspulpausen or at Thread breaks measured values are recorded, the lead to erroneous results.
  • the counting unit receives Signals from the length measuring device. After reaching the Target length of the wound on the cross-wound yarn is From the counting unit a signal is given to the yarn cleaner and the thread is severed by the built-in knife. One further data exchange between the Length measuring device and the yarn cleaner does not take place.
  • Another device for measuring the speed of Threads on a winding device shows the DE 42 25 842 A1.
  • the winding device is used to produce cheeses, wherein the rotation of the cheese by means of a frictional action of a drive roller is generated.
  • a runtime correlator circuit with two at a fixed distance in the direction of movement of the running textile thread successively arranged measuring points, where contact is measured, and another Signalers are connected to each other.
  • the signaler is designed as a pickup, the pulses of one with the Drive roller of the cross-wound bobbin connected.
  • the Density of the pulse sequence is a measure of the Circumferential speed of known in their diameter Drive roller and thus also approximately for the speed of the running thread.
  • Runtime correlator determined speed can via a Integrator directly for cumulative run length determination of a textile thread.
  • the generic DE 196 40 184 A1 describes the complete cleaning both long and short Garnwhere at the winding units of a winder. This will be after the occurrence of a yarn defect, the length of the yarn faulty thread between the time of occurrence the error and the time of the thread cut determined. to Elimination of the faulty thread piece becomes a suction tube positioned in front of the package. The thread end is unwound, the entry of the thread by means of a in the Suction tube arranged thread end sensor detected and the unwound from the package and in the suction pipe incoming thread length determined.
  • the unwinding process will stopped if, based on the determined thread length one such thread length has been sucked into the suction pipe, that during subsequent insertion of the bobbin-side thread in the yarn end connecting device since the occurrence of Garnschreib still wound thread length outside the Thread end connecting device for separating remains.
  • the Quality control of the yarn is carried out by the measuring head of a Cleaner.
  • a yarn cleaning device the so is set up that the means for determining the Longitudinal extension of a yarn error one contactless working measuring head with two in the direction of movement of current thread successively arranged measuring points and a delay correlator for evaluating the temporal sequence of the detected measured values has increased the accuracy of the measured error length is significant.
  • a higher measuring reliability can also be applied to one "Safety margin" when determining the Cleaning limits in the quality matrix whole or partially waived.
  • Such a surcharge exists For example, in a shortening of each as inadmissible predetermined error length to ensure that despite Occurrence of measurement inaccuracy a certain invalid Error is still detected and cut out.
  • the non-contact measuring head with two in the direction of movement of the current thread in a row having arranged measuring points and a Runtime correlator for evaluating the time sequence of has detected measured values, it may be in the two Yarn sensors arranged at the two one behind the other Measuring points are used to non-contact Sensors that act, for example, on optical or capacitive base work.
  • the yarn sensors detect one stochastic function of the transverse dimension of the running thread, where the variations of the transverse dimension mass, volume or Diameter variations can be.
  • the measuring head designed so that the yarn sensors the Detect transverse dimension of the running thread, the Transverse dimension of the current thread representing signals on the one hand for a highly accurate determination of Garn breeding, and on the other hand advantageous for a Quality control of the yarn can be used.
  • This also has the advantage that the transverse dimension of the current thread and the yarn speeds are measured at the same point and thus no caused by different measuring locations Falsifications of the measurement result may occur.
  • One so far for the yarn cleaning usual separate cleaner measuring head eliminated. By eliminating the cleaner measuring head at each Job can be in multi-site textile machines, such as Spooling machines or spinning-winding machines, considerable Achieve savings or cost reductions.
  • a further increase in measurement reliability achieved in that the yarn cleaning device so is set up as a signal to monitor the Transverse dimension of the current thread in each case a third signal as arithmetic mean of the respective measured values of the two measuring points is formed.
  • Leave with a yarn cleaning device according to the invention advantageously an increase in the accuracy of measurement and the measuring reliability, a quality improvement of the yarn as well as cost savings and productivity gains in the Achieve textile machine.
  • the drive roller 7 gives the cheese 8 by means Frictional action a rotational movement.
  • the cheese 8 is supported by a coil holder 9, which in a rotary joint 10th pivotable in the machine frame 11 partially shown is stored.
  • the thread 1 is subject to a continuous Quality monitoring. This is done by means of the Cleaner measuring head 4 the diameter of the running thread 1 measured. For the diameter or thickness measurement of the thread 1 is a known optical Sensor device used.
  • the measuring head 6 has two in the direction of movement of the current Thread 1 consecutively fixed measuring points with each a yarn sensor 12, 13. The measured values of the yarn sensors 12, 13 are evaluated via a delay correlator 14 and the Thread speed determined. About an integrator is the Thread speed for cumulative run length determination of Thread evaluated.
  • An angle sensor 15 outputs signals proportional to Thread speed off.
  • a flywheel 17 is arranged, whose individual poles when moving past the angle sensor 15th be registered.
  • the number of pulses is counted and via the control device 18 to the delay correlator 14 for Range specification for the correct locking of the control loop fed.
  • the control device 18 comprises an evaluation and Memory module.
  • the control device 18 has a module to the store specified yarn length and the specified Yarn length and the cumulated yarn length together to compare. If the cumulated yarn length reaches the predetermined value, generates the controller 18 a Signal with which the cutting device 5 is activated and the Thread 1 is severed. The winding process is terminated, the full cross-wound bobbin 8 transported away and after inserting a not shown empty sleeve a new winding process started.
  • the length measurement described allows highly accurate compliance the predetermined thread length, on the cheese 8 should be wound up.
  • Figure 2 shows a winding unit with an alternative Formation of the yarn cleaning device according to the invention, which largely equals the winding unit of FIG. in the Difference to the winding unit of Figure 1, this winding unit however, no separate detergent measuring head.
  • the yarn sensor 12 detects the thread thickness.
  • the yarn sensor 12 is part of it one known per se and therefore not in detail shown optical measuring path. Becomes an invalid Thickness deviation of the thread 1 detected, is about the Linkage with the controller 18, the length of the Garnmount determined. Carrying out a cleaner cut as well as end and beginning of the winding process are at the Spool of Figure 2 analogous to that described in Figure 1 above Process completed.
  • the measured values of the yarn 1 representing the thread thickness of the thread 1 Garnsensors 12 are on the one hand as a thickness value for the Quality control evaluated and used in conjunction with the measured values of the yarn sensor 12 of the speed relationship Yarn length measurement.
  • the measured values for Detection of the thread thickness of both the yarn sensor 12 as well the yarn sensor 13, which is like the yarn sensor 12, fed to the controller 18 and in the Control device 18 from each of the same place of the thread measured values each have a third signal as Arithmetic mean of the two measured values formed. With This signal representing the thread thickness becomes the Measurement reliability increased.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Quality & Reliability (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)

Description

Die Erfindung betrifft eine Garnreinigungseinrichtung nach dem Oberbegriff des Anspruchs 1.The invention relates to a yarn cleaning device according to the Preamble of claim 1.

Es ist üblich, an Textilmaschinen, wie zum Beispiel Spulmaschinen oder Spinn-Spulmaschinen, die Qualität des laufenden Fadens durch einen sogenannten Reiniger an jeder Arbeitsstelle zu überwachen, um eine hohe Gleichmäßigkeit beziehungsweise eine hohe Qualität des Garns zu erzielen. Dabei wird mittels eines Garnsensors kontinuierlich eine Querdimension des Fadens, zum Beispiel die Dicke des Fadens, detektiert. Bei Über- oder Unterschreitung vorgegebener Werte der Querdimension des Fadens wird die Länge dieser Toleranzüberschreitung ermittelt. Abhängig von dem Grad der Dickenabweichung und der Länge der Abweichung wird entschieden, ob der Fehler lediglich registriert oder ob der Garnabschnitt mit einem unzulässigen Fehler durch einen Reinigerschnitt oder eine Spinnunterbrechung eliminiert wird.It is common to textile machines, such as Spooling machines or spinning-winding machines, the quality of running thread through a so-called cleaner at each Job to monitor to a high uniformity or to achieve a high quality of the yarn. In this case, by means of a yarn sensor continuously a Transverse dimension of the thread, for example the thickness of the thread, detected. When exceeding or falling below specified values the transverse dimension of the thread becomes the length of this thread Tolerance exceeded determined. Depending on the degree of Thickness deviation and the length of the deviation is decided whether the error is merely registered or whether the Yarn section with an impermissible error by one Cleaner cut or a spin break is eliminated.

Für diese Entscheidung wird eine Qualitätsmatrix erstellt, in der beispielsweise die Durchmesserabweichung in Prozent und die Fehlerlänge in Millimeter eingetragen sind. Nach dieser Matrix wird der gewünschte Ausreinigungsgrad eingestellt und der Maschine beziehungsweise der Arbeitsstelle vorgegeben. Die zur Bestimmung der Fehlerlänge erforderlichen Meßwerte erhält der Reiniger zum Beispiel durch Detektion der momentanen Oberflächengeschwindigkeit beziehungsweise der Drehzahl der Antriebswalze, welche mittels Friktion die Kreuzspule in Rotation versetzt. Arbeitsstellen mit einem derartigen Reiniger sind zum Beispiel aus der CH 635 300 A5, aus der DE 29 18 740 C2, aus der DE 39 11 505 A1 oder der gattungsbildenden DE 196 40 184 A1 bekannt.For this decision, a quality matrix is created, in for example, the diameter deviation in percent and the error length is entered in millimeters. After this Matrix is set the desired degree of purification and the machine or the job specified. The receives required values for determining the error length the cleaner for example by detecting the current Surface speed or the speed of the Drive roller, which by means of friction, the cheese in Rotation offset. Jobs with such Cleaners are, for example, from the CH 635 300 A5, from the DE 29 18 740 C2, from DE 39 11 505 A1 or the generic DE 196 40 184 A1 known.

Die CH 669 779 A5 beschreibt die Längenmessung des laufenden Fadens auf Kreuzspulen herstellenden Spulmaschinen. Die Längenmessung erfolgt mit Hilfe eines optischen Korrelatorsystems. Beim Auf- oder Umspulen soll die Länge des aufgespulten Fadens möglichst genau ermittelt werden, um zum Beispiel in der Webereivorbereitung das Umspulen von Restspulen oder Abfall durch auf den Spulen verbleibenden Garnresten zu vermindern oder ganz zu vermeiden. Das Garn wird beispielsweise von einem Spinnkops auf die von einer Nutentrommel angetriebene Kreuzspule umgespult. Eine solche Nutentrommel wird auch als Antriebswalze mit Kehrgewinde bezeichnet. Ein Tastkopf mit eingebautem Messer und ein Steuergerät dienen der elektronischen Garnreinigung. Die Längenmeßeinrichtung besteht aus einem weiteren Tastkopf, welcher eine Optikeinrichtung und einen Vorverstärker enthält sowie aus einer Zähl- und Anzeigeeinheit, welche alle übrigen Schaltungen enthält. Vom Garnreiniger oder auch von einem mechanischen Fadentaster sowie von der Antriebseinrichtung der Kreuzspule erhält die Längenmeßeinrichtung die Information, daß tatsächlich ein Garn gespult wird. Damit soll vermieden werden, daß in den Umspulpausen beziehungsweise bei Fadenunterbrechungen Meßwerte erfaßt werden, die zu fehlerhaften Ergebnissen führen. Die Zähleinheit erhält Signale von der Längenmeßeinrichtung. Nach dem Erreichen der Soll-Länge des auf der Kreuzspule aufgewickelten Fadens wird von der Zähleinheit ein Signal an den Garnreiniger abgegeben und der Faden vom eingebauten Messer durchtrennt. Ein weitergehenderer Datenaustausch zwischen der Längenmeßeinrichtung und dem Garnreiniger findet nicht statt.The CH 669 779 A5 describes the length measurement of the current Yarns on spools producing cross-wound bobbins. The Length measurement is carried out by means of an optical Correlator. When winding or rewinding, the length of the wound yarn are determined as accurately as possible to Example in the weaving preparation the rewinding of Residual coils or waste remaining on the coils To reduce or completely avoid yarn residues. The yarn becomes for example, from a spinning cop to that of a Reel wound Reel wound reel. Such Grooved drum is also called a drive roller with reverse thread designated. A probe with built-in knife and a Control unit are used for electronic yarn cleaning. The Length measuring device consists of a further probe, which contains an optical device and a preamplifier and from a counting and display unit, which all others Contains circuits. From the yarn cleaner or even one mechanical thread feeler as well as of the drive device of Cheese, the length measuring device receives the information that actually a yarn is spooled. This should be avoided be that in the Umspulpausen or at Thread breaks measured values are recorded, the lead to erroneous results. The counting unit receives Signals from the length measuring device. After reaching the Target length of the wound on the cross-wound yarn is From the counting unit a signal is given to the yarn cleaner and the thread is severed by the built-in knife. One further data exchange between the Length measuring device and the yarn cleaner does not take place.

Eine weitere Vorrichtung zum Messen der Geschwindigkeit von Fäden an einer Wickeleinrichtung zeigt die DE 42 25 842 A1. Die Wickeleinrichtung dient der Herstellung von Kreuzspulen, wobei die Drehung der Kreuzspule mittels Friktionswirkung von einer Antriebswalze erzeugt wird. Eine Laufzeitkorrelator-Schaltung mit zwei in festem Abstand in Bewegungsrichtung des laufenden Textilfadens hintereinander angeordneten Meßpunkten, an denen berührungslos gemessen wird, und ein weiterer Signalgeber sind miteinander verbunden. Der Signalgeber ist als Impulsaufnehmer ausgebildet, der Impulse von einem mit der Antriebswalze der Kreuzspule verbundenen Polrad aufnimmt. Die Dichte der Impulsfolge ist dabei ein Maß für die Umfangsgeschwindigkeit der in ihrem Durchmesser bekannten Antriebswalze und damit auch annähernd für die Geschwindigkeit des laufenden Fadens. Diese Signale werden dem Laufzeitkorrelator zur Bereichsvorgabe für das Einrasten des Regelkreises auf das richtige Totzeitmaximum (Maximum der Korrelationsfunktion für die Laufzeit des Fadens vom ersten zum zweiten Meßpunkt = Totzeit) zugeleitet. Dadurch kann die hohe Meßgenauigkeit des Laufzeitkorrelators ohne erheblichen Aufwand an Rechenkapazität auch bei sich ändernden Fadengeschwindigkeiten genutzt werden. Die mit Hilfe des Laufzeitkorrelators ermittelte Geschwindigkeit kann über einen Integrator unmittelbar zur kumulativen Lauflängenbestimmung eines Textilfadens ausgewertet werden.Another device for measuring the speed of Threads on a winding device shows the DE 42 25 842 A1. The winding device is used to produce cheeses, wherein the rotation of the cheese by means of a frictional action of a drive roller is generated. A runtime correlator circuit with two at a fixed distance in the direction of movement of the running textile thread successively arranged measuring points, where contact is measured, and another Signalers are connected to each other. The signaler is designed as a pickup, the pulses of one with the Drive roller of the cross-wound bobbin connected. The Density of the pulse sequence is a measure of the Circumferential speed of known in their diameter Drive roller and thus also approximately for the speed of the running thread. These signals are the Runtime correlator for the range setting for the locking of the Control circuit to the right dead time maximum (maximum of Correlation function for the duration of the thread from the first to the second measuring point = dead time) forwarded. This allows the high accuracy of the time of flight correlator without significant Effort of computing capacity even with changing Thread speeds are used. The with the help of Runtime correlator determined speed can via a Integrator directly for cumulative run length determination of a textile thread.

Die gattungsbildende DE 196 40 184 A1 beschreibt die vollständige Ausreinigung sowohl langer als auch kurzer Garnfehler an den Spulstellen einer Spulmaschine. Dazu wird nach Auftreten eines Garnfehlers die Länge des fehlerbehafteten Fadens zwischen dem Zeitpunkt des Auftretens des Fehlers und dem Zeitpunkt des Fadenschnitts ermittelt. Zur Beseitigung des fehlerbehafteten Fadenstücks wird ein Saugrohr vor der Auflaufspule positioniert. Das Fadenende wird abgespult, der Eintritt des Fadens mittels eines in dem Saugrohr angeordneten Fadenendensensors festgestellt und die von der Auflaufspule abgewickelte und in das Saugrohr einlaufende Fadenlänge ermittelt. Der Abwickelvorgang wird gestoppt, wenn auf Basis der ermittelten Fadenlänge eine solche Fadenlänge in das Saugrohr eingesaugt worden ist, daß beim anschließenden Einlegen des auflaufspulenseitigen Fadens in die Fadenendenverbindeeinrichtung die seit Auftreten des Garnfehlers noch aufgespulte Fadenlänge außerhalb der Fadenendenverbindeeinrichtung zum Abtrennen verbleibt. Die Qualitätsüberwachung des Garns erfolgt durch den Meßkopf eines Reinigers.The generic DE 196 40 184 A1 describes the complete cleaning both long and short Garnfehler at the winding units of a winder. This will be after the occurrence of a yarn defect, the length of the yarn faulty thread between the time of occurrence the error and the time of the thread cut determined. to Elimination of the faulty thread piece becomes a suction tube positioned in front of the package. The thread end is unwound, the entry of the thread by means of a in the Suction tube arranged thread end sensor detected and the unwound from the package and in the suction pipe incoming thread length determined. The unwinding process will stopped if, based on the determined thread length one such thread length has been sucked into the suction pipe, that during subsequent insertion of the bobbin-side thread in the yarn end connecting device since the occurrence of Garnfehler still wound thread length outside the Thread end connecting device for separating remains. The Quality control of the yarn is carried out by the measuring head of a Cleaner.

Die Geschwindigkeit des den Reiniger beim Spulvorgang durchlaufenden Fadens variiert beispielsweise abhängig von der Verlegefrequenz des Fadens um circa ± 35 Prozent. Entsprechend ungenau sind die nach dem Stand der Technik durch Auswertung der Antriebswalzenimpulse gewonnenen Garnfehlerlängen für die Ausreinigung des Garns.The speed of the cleaner during the winding process For example, continuous thread varies depending on the Laying frequency of the thread by about ± 35 percent. Corresponding Inaccurate are the according to the prior art by evaluation the drive roller pulses obtained yarn error lengths for the Cleaning the yarn.

Es ist Aufgabe der Erfindung, die bekannten Garnreinigungseinrichtungen an Spulstellen von Textilmaschinen zu verbessern.It is an object of the invention, the known Garnreinigungseinrichtungen winding units of textile machines to improve.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.This object is solved by the features of claim 1.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche. Further advantageous embodiments of the invention are Subject of the dependent claims.

Eine erfindungsgemäße Garnreinigungseinrichtung, die so eingerichtet ist, daß die Einrichtung zum Bestimmen der Längsausdehnung eines Garnfehlers einen berührungslos arbeitenden Meßkopf mit zwei in Bewegungsrichtung des laufenden Fadens hintereinander angeordneten Meßpunkten aufweist sowie einen Laufzeitkorrelator zur Auswertung der zeitlichen Abfolge der detektierten Meßwerte besitzt, erhöht die Genauigkeit der gemessenen Fehlerlänge signifikant. Neben einer höheren Meßsicherheit kann auch auf einen "Sicherheitszuschlag" bei der Festlegung der Ausreinigungsgrenzen in der Qualitätsmatrix ganz oder teilweise verzichtet werden. Ein derartiger Zuschlag besteht zum Beispiel in einer Verkürzung der als jeweils unzulässig vorgegebenen Fehlerlänge, um sicherzustellen, daß trotz Auftreten der Meßungenauigkeit ein bestimmter unzulässiger Fehler noch detektiert und herausgeschnitten wird. Wird aus den an der Antriebswalze nach dem Stand der Technik detektierten Impulsen eine Geschwindigkeit ermittelt, die niedriger ist als die tatsächliche Geschwindigkeit des durch den Reinigermeßkopf der Garnreinigungseinrichtung laufenden Fadens, wird eine Fehlerlänge berechnet, die kürzer ist als die tatsächliche Fehlerlänge. Dadurch könnten tatsächlich vorhandene unzulässige Fehler nicht als solche erkannt werden und die Garnqualität unerwünscht mindern. Wird dagegen eine Geschwindigkeit ermittelt, die höher ist als die tatsächliche Geschwindigkeit, wird aufgrund der Meßergebnisse auf einen unzulässigen Fehler geschlossen, obwohl ein solcher nicht vorliegt und die Zahl der Reinigerschnitte oder der Spinnunterbrechungen somit unnötig erhöht.A yarn cleaning device according to the invention, the so is set up that the means for determining the Longitudinal extension of a yarn error one contactless working measuring head with two in the direction of movement of current thread successively arranged measuring points and a delay correlator for evaluating the temporal sequence of the detected measured values has increased the accuracy of the measured error length is significant. Next A higher measuring reliability can also be applied to one "Safety margin" when determining the Cleaning limits in the quality matrix whole or partially waived. Such a surcharge exists For example, in a shortening of each as inadmissible predetermined error length to ensure that despite Occurrence of measurement inaccuracy a certain invalid Error is still detected and cut out. Will out the on the drive roller according to the prior art Detected pulses determines a speed, the is lower than the actual speed of the through the cleaner measuring head of the yarn cleaning device running Thread, an error length is calculated that is shorter than the actual error length. This could actually happen existing inadmissible errors can not be recognized as such and undesirably reduce the yarn quality. Will against a Determined speed that is higher than the actual Speed, due to the measurement results on one Inadmissible error closed, although not one present and the number of cleaner cuts or the Spin interruptions thus unnecessarily increased.

Da mit einer erfindungsgemäßen Garnreinigungseinrichtung der Sicherheitszuschlag weitgehend oder ganz vernachlässigt werden kann, sinkt die Zahl der als unzulässig angezeigten Garnfehler deutlich und damit auch die Zahl der Reinigungsschnitte oder der Spinnunterbrechungen. Dies führt zu einer verbesserten Garnqualität und einer Steigerung der Produktivität der Arbeitsstelle oder der Textilmaschine.Since with a yarn cleaning device according to the invention the Security surcharge be largely or completely neglected can, the number of yarn errors indicated as inadmissible decreases clearly and thus also the number of cleaning cuts or the spinning breaks. This leads to an improved Yarn quality and an increase in productivity Job or textile machine.

Bei einer Einrichtung zum Bestimmen der Längsausdehnung eines Garnfehlers, die einen berührungslos arbeitenden Meßkopf mit zwei in Bewegungsrichtung des laufenden Fadens hintereinander angeordneten Meßpunkten aufweist sowie einen Laufzeitkorrelator zur Auswertung der zeitlichen Abfolge der detektierten Meßwerte besitzt, kann es sich bei den zwei Garnsensoren, die an den beiden hintereinander angeordneten Meßpunkten eingesetzt sind, um berührungslos arbeitende Sensoren handeln, die zum Beispiel auf optischer oder kapazitiver Basis arbeiten. Die Garnsensoren erfassen eine stochastische Funktion der Querdimension des laufenden Fadens, wobei die Schwankungen der Querdimension Masse-, Volumen- oder Durchmesserschwankungen sein können. Ist der Meßkopf erfindungsgemäß so ausgebildet, daß die Garnsensoren die Querdimension des laufenden Fadens detektieren, können die die Querdimension des laufenden Fadens repräsentierenden Signale einerseits für eine hochgenaue Bestimmung der Garngeschwindigkeit, und andererseits vorteilhaft für eine Qualitätsüberwachung des Garns genutzt werden. Dies hat zudem den Vorteil, daß die Querdimension des laufenden Fadens und die Garngeschwindigkeit an derselben Stelle gemessen werden und somit keine durch unterschiedliche Meßorte hervorgerufene Verfälschungen des Meßergebnisses auftreten können. Ein bisher für die Garnreinigung üblicher gesonderter Reinigermeßkopf entfällt. Durch den Wegfall des Reinigermeßkopfes an jeder Arbeitsstelle lassen sich bei Vielstellen-Textilmaschinen, wie Spulmaschinen oder Spinn-Spulmaschinen, erhebliche Einsparungen beziehungsweise Kostensenkungen erzielen.In a device for determining the longitudinal extent of a Garnfehlers, the non-contact measuring head with two in the direction of movement of the current thread in a row having arranged measuring points and a Runtime correlator for evaluating the time sequence of has detected measured values, it may be in the two Yarn sensors arranged at the two one behind the other Measuring points are used to non-contact Sensors that act, for example, on optical or capacitive base work. The yarn sensors detect one stochastic function of the transverse dimension of the running thread, where the variations of the transverse dimension mass, volume or Diameter variations can be. Is the measuring head According to the invention designed so that the yarn sensors the Detect transverse dimension of the running thread, the Transverse dimension of the current thread representing signals on the one hand for a highly accurate determination of Garngeschwindigkeit, and on the other hand advantageous for a Quality control of the yarn can be used. This also has the advantage that the transverse dimension of the current thread and the yarn speeds are measured at the same point and thus no caused by different measuring locations Falsifications of the measurement result may occur. One so far for the yarn cleaning usual separate cleaner measuring head eliminated. By eliminating the cleaner measuring head at each Job can be in multi-site textile machines, such as Spooling machines or spinning-winding machines, considerable Achieve savings or cost reductions.

Vorzugsweise wird eine weitere Steigerung der Meßsicherheit dadurch erreicht, daß die Garnreinigungseinrichtung so eingerichtet ist, daß als Signal zur Überwachung der Querdimension des laufenden Fadens jeweils ein drittes Signal als arithmetischer Mittelwert aus den jeweiligen Meßwerten der beiden Meßpunkte gebildet ist.Preferably, a further increase in measurement reliability achieved in that the yarn cleaning device so is set up as a signal to monitor the Transverse dimension of the current thread in each case a third signal as arithmetic mean of the respective measured values of the two measuring points is formed.

Mit einer erfindungsgemäßen Garnreinigungseinrichtung lassen sich in vorteilhafter Weise eine Steigerung der Meßgenauigkeit und der Meßsicherheit, eine Qualitätsverbesserung des Garns sowie Kosteneinsparungen und Produktivitätssteigerungen an der Textilmaschine erzielen.Leave with a yarn cleaning device according to the invention advantageously an increase in the accuracy of measurement and the measuring reliability, a quality improvement of the yarn as well as cost savings and productivity gains in the Achieve textile machine.

Anhand der in den Figuren dargestellten Ausführungsbeispiele wird die Erfindung weiter erläutert.With reference to the embodiments illustrated in FIGS the invention will be further explained.

Es zeigen:

Fig. 1
eine Spulstelle einer Spulmaschine in vereinfachter Darstellung mit dem Meßkopf einer Längenmeßeinrichtung und einem Reinigermeßkopf im Fadenlauf,
Fig. 2
eine Spulstelle einer Spulmaschine in vereinfachter Darstellung mit dem Meßkopf einer Längenmeßeinrichtung.
Show it:
Fig. 1
a winding unit of a winding machine in a simplified representation with the measuring head of a length measuring device and a cleaner measuring head in the yarn path,
Fig. 2
a winding unit of a winding machine in a simplified representation with the measuring head of a length measuring device.

An der Spulstelle der Figur 1 wird der Faden 1 von einer Ablaufspule 2 abgezogen und durchläuft eine geregelte Fadenbremse 3, einen Reiniger 4, eine Schneideinrichtung 5 und den Meßkopf 6 einer Einrichtung zum Bestimmen der durchlaufenden Fadenlänge, bevor er durch eine mit Kehrgewinderillen versehene Antriebswalze 7 in eine Changierbewegung versetzt und auf die Kreuzspule aufgewickelt wird. Die Antriebswalze 7 erteilt der Kreuzspule 8 mittels Friktionswirkung eine Rotationsbewegung. Die Kreuzspule 8 wird von einem Spulenhalter 9 getragen, der in einem Drehgelenk 10 im teilweise dargestellten Maschinengestell 11 schwenkbar gelagert ist.At the winding unit of Figure 1, the thread 1 of a Drain coil 2 deducted and goes through a regulated Thread brake 3, a cleaner 4, a cutter 5 and the measuring head 6 of a device for determining the continuous thread length before passing through a Kehrgewinderillen provided drive roller 7 in a Offset traversing motion and wound on the cheese becomes. The drive roller 7 gives the cheese 8 by means Frictional action a rotational movement. The cheese 8 is supported by a coil holder 9, which in a rotary joint 10th pivotable in the machine frame 11 partially shown is stored.

Der Faden 1 unterliegt einer kontinuierlichen Qualitätsüberwachung. Dazu wird mittels des Reinigermeßkopfes 4 der.Durchmesser des laufenden Fadens 1 gemessen. Für die Durchmesser- beziehungsweise Dickenmessung des Fadens 1 wird eine an sich bekannte optische Sensoreinrichtung eingesetzt.The thread 1 is subject to a continuous Quality monitoring. This is done by means of the Cleaner measuring head 4 the diameter of the running thread 1 measured. For the diameter or thickness measurement of the thread 1 is a known optical Sensor device used.

Mit Hilfe des berührungslos arbeitenden Meßkopfes 6 wird die Länge des zur Kreuzspule 8 durchlaufenden Fadens 1 bestimmt. Der Meßkopf 6 weist zwei in Bewegungsrichtung des laufenden Fadens 1 hintereinander fest angeordnete Meßpunkte mit jeweils einem Garnsensor 12, 13 auf. Die Meßwerte der Garnsensoren 12, 13 werden über einen Laufzeitkorrelator 14 ausgewertet und die Fadengeschwindigkeit ermittelt. Über einen Integrator wird die Fadengeschwindigkeit zur kumulativen Lauflängenbestimmung des Fadens ausgewertet.With the help of the non-contact measuring head 6 is the Length determined by the cross-wound bobbin 8 thread 1. The measuring head 6 has two in the direction of movement of the current Thread 1 consecutively fixed measuring points with each a yarn sensor 12, 13. The measured values of the yarn sensors 12, 13 are evaluated via a delay correlator 14 and the Thread speed determined. About an integrator is the Thread speed for cumulative run length determination of Thread evaluated.

Ein Winkelsensor 15 gibt Signale proportional der Fadengeschwindigkeit ab. Zum Erzeugen der Impulse ist auf der Welle 16 der Antriebswalze 7 ein Polrad 17 angeordnet, dessen einzelne Pole beim Vorbeiwandern am Winkelsensor 15 registriert werden. Die Anzahl der Impulse wird gezählt und über die Steuereinrichtung 18 dem Laufzeitkorrelator 14 zur Bereichsvorgabe für das richtige Einrasten des Regelkreises zugeleitet. Die Steuereinrichtung 18 umfaßt ein Auswerte- und Speichermodul.An angle sensor 15 outputs signals proportional to Thread speed off. To generate the pulses is on the Shaft 16 of the drive roller 7, a flywheel 17 is arranged, whose individual poles when moving past the angle sensor 15th be registered. The number of pulses is counted and via the control device 18 to the delay correlator 14 for Range specification for the correct locking of the control loop fed. The control device 18 comprises an evaluation and Memory module.

Weitere Einzelheiten zu einer Längenmessung mit Laufzeitkorrelator, wie sie auch in der in Fig. 1 dargestellten Spulstelle eingesetzt ist, können der DE 42 25 842 A1 entnommen werden.More details about a length measurement with Runtime correlator, as in the in Fig. 1 used winding unit is used, the DE 42 25 842 A1 are taken.

Die Steuereinrichtung 18 weist ein Modul auf, um die vorgegebene Garnlänge zu speichern und die vorgegebene Garnlänge und die kumulierte Garnlänge miteinander zu vergleichen. Erreicht die kumulierte Garnlänge den vorgegebenen Wert, generiert die Steuereinrichtung 18 ein Signal, mit dem die Schneideinrichtung 5 aktiviert und der Faden 1 durchtrennt wird. Der Wickelvorgang wird beendet, die volle Kreuzspule 8 abtransportiert und nach Einlegen einer nicht dargestellten leeren Hülse ein neuer Wickelvorgang gestartet.The control device 18 has a module to the store specified yarn length and the specified Yarn length and the cumulated yarn length together to compare. If the cumulated yarn length reaches the predetermined value, generates the controller 18 a Signal with which the cutting device 5 is activated and the Thread 1 is severed. The winding process is terminated, the full cross-wound bobbin 8 transported away and after inserting a not shown empty sleeve a new winding process started.

Die beschriebene Längenmessung erlaubt hochgenaues Einhalten der vorgegebenen Fadenlänge, die auf der Kreuzspule 8 aufgewickelt sein soll.The length measurement described allows highly accurate compliance the predetermined thread length, on the cheese 8 should be wound up.

Erfaßt der Reinigermeßkopf 4 eine unzulässige Unter- oder Überschreitung der Dicke des Fadens 1, wird die Länge dieses Garnfehlers über die Steuereinrichtung 18 detektiert. Zeigt sich, daß ein gemäß der vorgegebenen Reinigungsgrenzen der Qualitätsmatrix unzulässiger Garnfehler vorliegt, wird die Schneideinrichtung 5 aktiviert und ein Reinigerschnitt in bekannter Weise durchgeführt. Nach dem Eliminieren des fehlerbehafteten Fadenabschnittes, wie es beispielsweise aus der DE 196 14 184 A1 bekannt ist, werden die Fadenenden in einer Spleißeinrichtung 19 wieder verbunden und der Spulvorgang anschließend fortgesetzt.Detects the Reinigermeßkopf 4 an impermissible bottom or Exceeding the thickness of the thread 1, the length of this Garnfehler detected via the control device 18. Shows itself that one according to the predetermined cleaning limits of Quality matrix of improper yarn error is present, the Cutting device 5 is activated and a cleaner cut in performed in a known manner. After eliminating the faulty thread section, as it for example DE 196 14 184 A1 is known, the thread ends in a splicing device 19 connected again and the Winding process then continued.

In Verbindung mit der hochgenauen Längenmessung ist eine qualitativ hochwertige Qualitätsüberwachung des Fadens 1 erreichbar. Die hohe Meßsicherheit ermöglicht eine deutliche Verminderung der Reinigerschnitte und damit der Garnqualität sowie eine Steigerung der Produktivität durch weniger Unterbrechungen des Spulvorgangs.In connection with the high-precision length measurement is a high quality quality control of the thread 1 reachable. The high measuring reliability allows a clear Reduction of the cleaner cuts and thus the yarn quality as well as an increase in productivity through less Interruptions of the winding process.

Figur 2 zeigt eine Spulstelle mit einer alternativen Ausbildung der erfindungsgemäßen Garnreinigungseinrichtung, die weitgehend der Spulstelle der Figur 1 gleicht. Im Unterschied zur Spulstelle der Figur 1 weist diese Spulstelle jedoch keinen separaten Reinigermeßkopf auf. Der Garnsensor 12 detektiert die Fadendicke. Der Garnsensor 12 ist dabei Teil einer an sich bekannten und daher nicht im einzelnen dargestellten optischen Meßstrecke. Wird eine unzulässige Dickenabweichung des Fadens 1 detektiert, wird über die Verknüpfung mit der Steuereinrichtung 18 die Länge des Garnfehlers bestimmt. Die Durchführung eines Reinigerschnittes sowie Ende und Beginn des Spulvorganges werden an der Spulstelle der Figur 2 analog dem bei Figur 1 vorbeschriebenen Ablauf vollzogen.Figure 2 shows a winding unit with an alternative Formation of the yarn cleaning device according to the invention, which largely equals the winding unit of FIG. in the Difference to the winding unit of Figure 1, this winding unit however, no separate detergent measuring head. The yarn sensor 12 detects the thread thickness. The yarn sensor 12 is part of it one known per se and therefore not in detail shown optical measuring path. Becomes an invalid Thickness deviation of the thread 1 detected, is about the Linkage with the controller 18, the length of the Garnfehler determined. Carrying out a cleaner cut as well as end and beginning of the winding process are at the Spool of Figure 2 analogous to that described in Figure 1 above Process completed.

Die die Fadendicke des Fadens 1 repräsentierenden Meßwerte des Garnsensors 12 werden einerseits als Dickenwert für die Qualitätsüberwachung ausgewertet und dienen in Verknüpfung mit den Meßwerten des Garnsensors 12 der Geschwindigkeitsbeziehungsweise Fadenlängenmessung. The measured values of the yarn 1 representing the thread thickness of the thread 1 Garnsensors 12 are on the one hand as a thickness value for the Quality control evaluated and used in conjunction with the measured values of the yarn sensor 12 of the speed relationship Yarn length measurement.

In einer alternativen Ausgestaltung der Erfindung werden an einer Spulstelle, entsprechend der Figur 2, die Meßwerte zur Detektion der Fadendicke sowohl des Garnsensors 12 wie auch des Garnsensors 13, der wie der Garnsensor 12 ausgebildet ist, der Steuereinrichtung 18 zugeleitet und in der Steuereinrichtung 18 aus den jeweils von der gleichen Stelle des Fadens gewonnenen Meßwerten jeweils ein drittes Signal als arithmetischer Mittelwert der beiden Meßwerte gebildet. Mit diesem die Fadendicke repräsentierenden Signal wird die Meßsicherheit erhöht.In an alternative embodiment of the invention are to a winding unit, according to the figure 2, the measured values for Detection of the thread thickness of both the yarn sensor 12 as well the yarn sensor 13, which is like the yarn sensor 12, fed to the controller 18 and in the Control device 18 from each of the same place of the thread measured values each have a third signal as Arithmetic mean of the two measured values formed. With This signal representing the thread thickness becomes the Measurement reliability increased.

Die Erfindung ist selbstverständlich nicht auf die Ausführung beschränkt, die in den Figuren 1 und 2 dargestellt ist. Der Antrieb, die Lagerung und die Halterung von Vorrichtungsteilen sowie die Steuerung und Verknüpfung erfolgt, soweit hier nicht näher erläutert, entsprechend dem Stand der Technik, wie er zum Beispiel aus den zitierten Druckschriften und dem dort angeführten bekannten Stand der Technik hervorgeht.The invention is of course not on the execution limited, which is shown in Figures 1 and 2. Of the Drive, storage and mounting of device parts as well as the control and linking takes place, as far as not here explained in more detail, according to the prior art, as he for example, from the cited documents and the there cited known prior art.

Claims (3)

  1. A yarn cleaning apparatus at the winding head of a textile machine, comprising a mechanism for determining the longitudinal extension of a yarn defect,
    characterised in that the mechanism for determining the longitudinal extension of a yarn defect comprises a measurement head (6) working in contactless manner with two measurement points disposed one behind the other in the direction of movement of the moving thread (1) and also has a running time correlator (14) for evaluating the chronological sequence of the detected measured values.
  2. A yarn cleaning apparatus according to Claim 1,
    characterised in that the yarn cleaning apparatus is set up so that it uses measured values detected by the measurement head (6) for the continuous monitoring of the transverse dimension of the thread (1).
  3. A yarn cleaning apparatus according to Claim 2,
    characterised in that the yarn cleaning apparatus is set up so that as a signal for monitoring the transverse dimension of the thread (1) a third signal is formed as an arithmetic mean value from the respective measured values of the two measurements points.
EP02003948A 2001-04-14 2002-02-22 Yarn clearing device in the winding station of a textile machine Expired - Lifetime EP1249422B2 (en)

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DE10118660 2001-04-14
DE10118660A DE10118660A1 (en) 2001-04-14 2001-04-14 Yarn cleaning device at the winding unit of a textile machine

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EP1249422A3 EP1249422A3 (en) 2003-01-02
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DE10118660A1 (en) 2002-10-17
DE50202968D1 (en) 2005-06-09
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EP1249422A2 (en) 2002-10-16
EP1249422A3 (en) 2003-01-02

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