EP1685054B1 - Yarn cleaner - Google Patents

Yarn cleaner Download PDF

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Publication number
EP1685054B1
EP1685054B1 EP04765945A EP04765945A EP1685054B1 EP 1685054 B1 EP1685054 B1 EP 1685054B1 EP 04765945 A EP04765945 A EP 04765945A EP 04765945 A EP04765945 A EP 04765945A EP 1685054 B1 EP1685054 B1 EP 1685054B1
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EP
European Patent Office
Prior art keywords
yarn
diameter
effect
value
parameter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
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EP04765945A
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German (de)
French (fr)
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EP1685054A1 (en
Inventor
Iris Biermann
Olav Birlem
Hans Grecksch
Christoph Haase
Gerhard Rienas
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Oerlikon Textile GmbH and Co KG
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Oerlikon Textile GmbH and Co KG
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Publication of EP1685054A1 publication Critical patent/EP1685054A1/en
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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
    • 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 cleaner according to the preamble of claim 1.
  • yarn cleaners which monitor, for example, the diameter of the yarn continuously with a non-contact measuring head. If an intolerable error is detected due to the exceeding of limits designated as cleaning limits, the error is cut out of the yarn, the yarn ends are reconnected and the production process is continued such as from DE 10062479 A1 .
  • EP-A-1 295 835 EP-A-0 877 108 or WO 00/73189 known.
  • a single reference diameter is determined and chosen for cleaning limits.
  • a reference diameter is the reference diameter for all further evaluations. Measured actual diameters of the yarn are usually given as a percentage of the reference diameter.
  • the yarn cleaner according to the invention makes it possible to detect diameter-related yarn defects even with effect yarn.
  • the variability of the yarn parameter which is caused solely by the change between webs and effects, does not result in unnecessary cutting operations which would reduce productivity and create undesirable joints.
  • the yarn cleaner according to claim 3 can be set up.
  • the selection of only the effects may be due to the fact that the satisfactory bridge training is assumed, but the effect training is not reliable enough.
  • the amount of computation required and the number of times of cutting can be reduced.
  • the diameter of the effect yarn is primarily used as a yarn parameter, the cleaning limits being different depending on the respective measuring point, ie web or effect.
  • the web diameter also referred to as a web thickness
  • a yarn cleaner according to claim 7 can be determined with a yarn cleaner according to claim 7 largely uninfluenced by the effects and thus close to reality. This also has a positive effect on the accuracy of the effect detection.
  • the boundary between web and effect can be determined with sufficient accuracy for the cleaning of the effect yarn.
  • the fancy yarn 1 is withdrawn through the withdrawal tube 2 from the spinning device 3 and wound onto the cheese 4.
  • the effect yarn 1 passes between the spinning device 3 and cheese 4 a yarn cleaner 5, which includes a measuring head 6 and a processor 8, and then a guide eye 9.
  • the yarn cleaner 5 is associated with a thread monitor 7.
  • the drive drum 10 drives the cheese 4 during the winding by means of frictional engagement.
  • a motor 11 gives the drive drum 10 the rotational movement.
  • the yarn cleaner 5 is used to monitor the quality of the current fancy yarn 1.
  • Der Garnrenberg 5 is connected to other facilities for control, data storage or evaluation and the control of other elements of the spinning unit or the spinning machine by means of the line 12.
  • the components of the yarn cleaner 5 may be integrated in a common housing.
  • the effect yarn can also be withdrawn from a delivery bobbin instead of a spinning device.
  • Fig. 2 shows the representation of the effect yarn 1 as a juxtaposition of measured values. Although the regions of the effects 13 and of the webs 14 can be seen, the beginning and end of the effects 13 and the effect thickness or the effect diameter D E and the web thickness or the web diameter D ST are not clear and therefore not sufficiently recognizable.
  • the yarn cleaner 5 registers the yarn diameter D at a distance of 2 mm.
  • One cycle represents a gauge length of 2 mm effect yarn 1.
  • the cleaner 5 initially forms an arithmetic mean of the yarn diameter from a predetermined length of effect yarn 1 as the reference diameter, subtracting the reference diameter from the measured ones Individual values of the yarn diameter and forms the mean value of the web diameter D ST as an arithmetic mean of all negative difference values that have been measured adjacent to other negative difference values.
  • the determination of the effect diameter D E and the boundaries between effects 13 and webs 14 is determined on the basis of FIG. 3 explained.
  • the curve 15 represents in the representation of Fig. 3 starting from the left to the point 16 the web diameter D ST . From the point 16, the curve 15 increases and passes at point 17, the value of the limit diameter D GR . At point 18, the predetermined yarn length L V has passed since reaching point 17. After a diameter increase of 15% is registered at point 17 and the exceeding of the limit diameter D GR over the predetermined length L V, for example, lasts six cycles or 12 mm long, the point 17 is defined as the beginning of the effect 13.
  • the curve 15 falls below the limit diameter D GR at the point 19.
  • the undershooting stops until point 20 and thus over the predetermined yarn length L V on.
  • the point 19 is defined as the end of the effect 13.
  • the area between point 17 and point 19 is defined as effect 13.
  • the section of the effect yarn 1 following point 19 or the end of the effect 13 is defined as a web 14 until a start of an effect 13 is determined again.
  • the effect diameter D E is assigned a predetermined tolerance range with a cleaning limit RG EO as the upper limit value and with a cleaning limit RG EU as the lower limit value. Accordingly, the web diameter D ST is a predetermined tolerance range with a cleaning limit RG STO as upper Limit and with a cleaning limit RG STU assigned as the lower limit.
  • the yarn cleaner 5 continuously determines whether the diameter values of the effect yarn 1 detected by the measuring head 6 originate from a region which is defined as a web 14 or as an effect 13. If the diameter values of the effect yarn 1 originate from a region which is defined as a web 14, these diameter values are compared with the limit values assigned to the web diameter D ST , the cleaning limit RG STO and the cleaning limit RG STU . If the diameter values of the effect yarn 1 originate from a region which is defined as effect 13, these diameter values are compared with the limit values associated with the effect diameter D E , the cleaning limit RG EO and the cleaning limit RG EU .
  • the yarn cleaner 5 may be arranged so that either only defects in land areas or only defects in effect areas are cleaned out.
  • the yarn cleaner 5 is set up so that the exceeding of these limits or cleaning limits registered as an untolerable error and this is cut out.
  • the yarn cleaner 5 is alternatively set up so that when these limit values or cleaning limits are exceeded, it is detected over which yarn length the exceeding continues.
  • a known two-dimensional classifying matrix also called a cleaner matrix
  • a classifying matrix is divided into length ranges in one dimension and into diameter ranges in the other dimension and forms a class by combining a length range with a diameter range.
  • the cleaning of yarn according to classes is known, for example, from the reference "Complete system for quality assurance in winding", Melliand - reprint October 1992, for a long time.

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

Abstract

The yarn cleaner (5) is designed for cleaning out defects from an effect yarn (1), which is formed from an alternating stringing together of webs and of effects comprised of given thickenings. The yarn cleaner has a measuring head (6) in which at least one yarn parameter is measured, whereby cleaning limits are determined for the yarn parameter, and the presence of a defect in the yarn is signaled when these limits are surpassed. The measured values of the yarn parameter are compared with the cleaning limits and intolerable defects are cut out from the yarn. The cleaning limits are each dependent on whether the values are measured in the web or in the effect. The yarn cleaner (5) is suited for keeping the desired diameter quality of effect yarn on winding and spinning winding machines.

Description

Die Erfindung betrifft einen Garnreiniger gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a yarn cleaner according to the preamble of claim 1.

Bei der Herstellung von Garn wird üblicherweise eine möglichst hohe Gleichmäßigkeit des Garns in engen Toleranzen sowie ein Garn ohne sichtbare Fehler, wie es untolerierbare Dick- oder Dünnstellen im Garn sind, angestrebt. Um dieses zu erreichen, werden sogenannte Garnreiniger eingesetzt, die beispielsweise den Durchmesser des Garns fortlaufend mit einem berührungslos arbeitenden Meßkopf überwachen. Wird aufgrund der Überschreitung von als Reinigungsgrenzen bezeichneten Grenzwerten ein untolerierbarer Fehler detektiert, wird der Fehler aus dem Garn herausgeschnitten, die Garnenden wieder verbunden und der Produktionsvorgang fortgesetzt wie beispielsweise aus der DE 10062479 A1 , EP-A-1 295 835 , EP-A-0 877 108 oder WO 00/73189 bekannt.In the production of yarn is usually the highest possible uniformity of the yarn in close tolerances and a yarn without visible defects, as are intolerable thick or thin spots in the yarn, sought. To achieve this, so-called yarn cleaners are used, which monitor, for example, the diameter of the yarn continuously with a non-contact measuring head. If an intolerable error is detected due to the exceeding of limits designated as cleaning limits, the error is cut out of the yarn, the yarn ends are reconnected and the production process is continued such as from DE 10062479 A1 . EP-A-1 295 835 . EP-A-0 877 108 or WO 00/73189 known.

Bei einer üblichen Garnüberwachung wird ein einziger Bezugsdurchmesser bestimmt und dafür Reinigungsgrenzen gewählt. Zum Beispiel aus der Literaturstelle "Elektronisches Garnüberwachungssystem Corolab für Rotor-Spinnspulautomaten Autocoro", Chemiefasern/Textilindustrie, 40./92. Jahrgang, April 1990, ist es zur Bestimmung eines Bezugsdurchmessers bekannt, bei Beginn der Messung an einer Spinnstelle über die ersten Garnmeter eine Durchmesser-Mittelwertbestimmung des Garns vorzunehmen. Dieser sogenannte Referenzdurchmesser ist der Bezugsdurchmesser für alle weiteren Auswertungen. Gemessene IST-Durchmesser des Garns werden üblicherweise als Prozentwert bezogen auf den Bezugsdurchmesser angegeben.In a conventional yarn monitoring a single reference diameter is determined and chosen for cleaning limits. For example, from the reference "Electronic yarn monitoring system Corolab for rotor spinning machines Autocoro", man-made fibers / textile industry, 40./92. Vintage, April 1990, it is known for determining a reference diameter to make a diameter average determination of the yarn at the beginning of the measurement at a spinning station on the first yarn meter. This so-called reference diameter is the reference diameter for all further evaluations. Measured actual diameters of the yarn are usually given as a percentage of the reference diameter.

Es ist Aufgabe der Erfindung, einen Reiniger vorzuschlagen, dessen Einsatzbereich vergrößert ist.It is an object of the invention to provide a cleaner whose application is increased.

Diese Aufgabe wird mit einem Garnreiniger mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved with a yarn cleaner with the features of claim 1.

Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous embodiments of the invention are the subject of the dependent claims.

Der erfindungsgemäße Garnreiniger ermöglicht es, auch bei Effektgarn durchmesserbezogene Garnfehler zu erkennen. Die Schwankungen des Garnparameters, die allein durch den Wechsel zwischen Stegen und Effekten hervorgerufen werden, wirken sich nicht in unnötigen Schneidvorgängen aus, die die Produktivität senken und unerwünschte Verbindungsstellen schaffen würden.The yarn cleaner according to the invention makes it possible to detect diameter-related yarn defects even with effect yarn. The variability of the yarn parameter, which is caused solely by the change between webs and effects, does not result in unnecessary cutting operations which would reduce productivity and create undesirable joints.

Für Steg und Effekt werden unterschiedliche Reinigungsgrenzen festgelegt, sodass die Fehlerermittlung nahezu so genau erfolgen kann wie bei einem effektfreien Garn.For web and effect, different cleaning limits are defined, so that the error detection can be almost as accurate as with an effect-free yarn.

Die an sich bekannten Reinigerfunktionen sind dabei weitgehend anwendbar, wodurch eine zufrieden stellende Bewertung des erzeugten Effektgarnes möglich wird (Anspruch 2).The known cleaning functions are largely applicable, whereby a satisfactory evaluation of the produced effect yarn is possible (claim 2).

Können bei einem Effektgarn entweder Fehler in den Stegbereichen oder Fehler in den Effektbereichen toleriert werden, kann der Garnreiniger gemäß Anspruch 3 eingerichtet sein. Die Auswahl nur der Effekte kann dadurch begründet sein, dass die zufrieden stellende Stegausbildung unterstellt wird, die Effektausbildung aber nicht zuverlässig genug ist. Wenn alternativ unterstellt werden kann, dass Abweichungen in der Effektausbildung nicht ins Gewicht fallen, kann es ausreichen, wenn nur die längeren Stegabschnitte analog einem regulären Garn gereinigt werden. Mit der Beschränkung auf eine Alternative kann der für die Ausreinigung erforderliche Rechenaufwand und die Zahl der Schneidvorgänge gesenkt werden.If either defects in the land areas or defects in the effect areas can be tolerated in a fancy yarn, the yarn cleaner according to claim 3 can be set up. The selection of only the effects may be due to the fact that the satisfactory bridge training is assumed, but the effect training is not reliable enough. Alternatively, if it can be assumed that deviations in the effect training are not significant, it may be sufficient if only the longer bridge segments are analogous to a regular one Yarn to be cleaned. With the restriction to one alternative, the amount of computation required and the number of times of cutting can be reduced.

Vorrangig wird als Garnparameter der Durchmesser des Effektgarnes herangezogen, wobei die Reinigungsgrenzen in Abhängigkeit von der jeweiligen Messstelle, also Steg oder Effekt, unterschiedlich sind.The diameter of the effect yarn is primarily used as a yarn parameter, the cleaning limits being different depending on the respective measuring point, ie web or effect.

Der Stegdurchmesser, auch als Stegdicke bezeichnet, kann mit einem Garnreiniger nach Anspruch 7 weitgehend unbeeinflusst von den Effekten und somit realitätsnah ermittelt werden. Dies wirkt sich auch in der Genauigkeit der Effekterfassung positiv aus.The web diameter, also referred to as a web thickness, can be determined with a yarn cleaner according to claim 7 largely uninfluenced by the effects and thus close to reality. This also has a positive effect on the accuracy of the effect detection.

Mit einem Garnreiniger gemäß Anspruch 8 ist eine relativ einfache, jedoch hinreichend genaue Effektgrenzenbestimmung möglich.With a yarn cleaner according to claim 8, a relatively simple, but sufficiently accurate effect boundary determination is possible.

Mit der Weiterbildung des Garnreinigers gemäß Anspruch 9 wird einem zu niedrig angesetzten Mittelwert für die Effekte entgegengewirkt. Einerseits könnte ein niedrig angesetzter Mittelwert zu unerwünschten Schnitten führen, wenn der Effekt, partiell gewollt stark ausgeprägt ist. Andererseits wäre eine unzureichende Differenzierung der Reinigungsgrenzen zwischen Effekt und Steg vorhanden.With the development of the yarn cleaner according to claim 9 counteracts a too low scheduled average for the effects. On the one hand, a low average could lead to unwanted cuts if the effect is partially intentionally strong. On the other hand, there would be insufficient differentiation of the cleaning boundaries between effect and ridge.

Mit einem Garnreiniger gemäß Anspruch 8 und 10 kann die Grenze zwischen Steg und Effekt mit für die Ausreinigung des Effektgarns hinreichender Genauigkeit ermittelt werden.With a yarn cleaner according to claim 8 and 10, the boundary between web and effect can be determined with sufficient accuracy for the cleaning of the effect yarn.

Die Erfindung ist anhand eines Ausführungsbeispieles näher erläutert. Es zeigen:

Fig. 1
eine vereinfachte schematische Darstellung einer Arbeitsstelle einer Spinnspulmaschine,
Fig. 2
ein Effektgarn, dass durch die Aneinanderreihung von Messwerten des Garndurchmessers dargestellt ist,
Fig. 3
eine Prinzipdarstellung eines Effektbereiches mit angrenzenden Stegteilen.
The invention is explained in more detail with reference to an embodiment. Show it:
Fig. 1
a simplified schematic representation of a workstation of a spinning winder,
Fig. 2
an effect yarn, represented by the juxtaposition of measured values of the yarn diameter,
Fig. 3
a schematic representation of an effect area with adjacent web parts.

In der in Fig. 1 dargestellten Spinnstelle wird das Effektgarn 1 durch das Abzugsröhrchen 2 aus der Spinnvorrichtung 3 abgezogen und auf die Kreuzspule 4 aufgewickelt. Das Effektgarn 1 durchläuft zwischen Spinnvorrichtung 3 und Kreuzspule 4 einen Garnreiniger 5, der einen Meßkopf 6 und einen Prozessor 8 umfasst, sowie anschließend eine Führungsöse 9. Dem Garnreiniger 5 ist ein Fadenwächter 7 zugeordnet. Die Antriebstrommel 10 treibt die Kreuzspule 4 während des Aufwickelvorganges mittels Reibschluss an. Ein Motor 11 erteilt der Antriebstrommel 10 die Drehbewegung. Der Garnreiniger 5 dient der Qualitätsüberwachung des laufenden Effektgarns 1. Der Garnreiniger 5 ist mit weiteren Einrichtungen zur Steuerung, Datenspeicherung oder -auswertung und der Ansteuerung von weiteren Elementen der Spinnstelle beziehungsweise der Spinnmaschine mittels der Leitung 12 verbunden. Die Bauteile des Garnreinigers 5 können in einem gemeinsamen Gehäuse integriert sein.In the in Fig. 1 spinning unit shown the fancy yarn 1 is withdrawn through the withdrawal tube 2 from the spinning device 3 and wound onto the cheese 4. The effect yarn 1 passes between the spinning device 3 and cheese 4 a yarn cleaner 5, which includes a measuring head 6 and a processor 8, and then a guide eye 9. The yarn cleaner 5 is associated with a thread monitor 7. The drive drum 10 drives the cheese 4 during the winding by means of frictional engagement. A motor 11 gives the drive drum 10 the rotational movement. The yarn cleaner 5 is used to monitor the quality of the current fancy yarn 1. Der Garnreiniger 5 is connected to other facilities for control, data storage or evaluation and the control of other elements of the spinning unit or the spinning machine by means of the line 12. The components of the yarn cleaner 5 may be integrated in a common housing.

Alternativ kann das Effektgarn statt von einer Spinnvorrichtung auch von einer Ablaufspule abgezogen werden.Alternatively, the effect yarn can also be withdrawn from a delivery bobbin instead of a spinning device.

Fig. 2 zeigt die Darstellung des Effektgarnes 1 als Aneinanderreihung von Messwerten. Die Bereiche der Effekte 13 und der Stege 14 sind zwar erkennbar, doch sind Beginn und Ende der Effekte 13 sowie die Effektdicke bzw. der Effektdurchmesser DE und die Stegdicke bzw. der Stegdurchmesser DST, nicht eindeutig und damit nicht ausreichend erkennbar. Fig. 2 shows the representation of the effect yarn 1 as a juxtaposition of measured values. Although the regions of the effects 13 and of the webs 14 can be seen, the beginning and end of the effects 13 and the effect thickness or the effect diameter D E and the web thickness or the web diameter D ST are not clear and therefore not sufficiently recognizable.

Der Garnreiniger 5 registriert den Garndurchmesser D jeweils im Abstand von 2 mm. Ein Takt repräsentiert eine Messlänge von 2 mm Effektgarn 1. Zur Bestimmung des der Ausreinigung zugrunde gelegten Stegdurchmessers DST bildet der Reiniger 5 bei Beginn der Messung zunächst einen arithmetischen Mittelwert des Garndurchmessers aus einer vorbestimmten Länge Effektgarn 1 als Referenzdurchmesser, subtrahiert den Referenzdurchmesser von den gemessenen Einzelwerten des Garndurchmessers und bildet den Mittelwert des Stegdurchmessers DST als arithmetischen Mittelwert aus allen negativen Differenzwerten, die benachbart zu anderen negativen Differenzwerten gemessen worden sind.The yarn cleaner 5 registers the yarn diameter D at a distance of 2 mm. One cycle represents a gauge length of 2 mm effect yarn 1. To determine the web diameter D ST used for cleaning, the cleaner 5 initially forms an arithmetic mean of the yarn diameter from a predetermined length of effect yarn 1 as the reference diameter, subtracting the reference diameter from the measured ones Individual values of the yarn diameter and forms the mean value of the web diameter D ST as an arithmetic mean of all negative difference values that have been measured adjacent to other negative difference values.

Die Ermittlung des Effektdurchmessers DE und der Grenzen zwischen Effekten 13 und Stegen 14 wird anhand der Figur 3 erläutert. In der Darstellung der Fig. 3 ist der Garndurchmesser D in Prozent über die Garnlänge LG als Kurve 15 dargestellt. Die Kurve 15 repräsentiert in der Darstellung der Fig. 3 von links beginnend bis zum Punkt 16 den Stegdurchmesser DST. Ab dem Punkt 16 steigt die Kurve 15 an und passiert am Punkt 17 den Wert des Grenzdurchmessers DGR. Am Punkt 18 ist die vorbestimmte Garnlänge LV seit Erreichen des Punktes 17 durchgelaufen. Nachdem am Punkt 17 eine Durchmesserzunahme von 15 % registriert wird und die Überschreitung des Grenzdurchmessers DGR über die vorbestimmte Länge LV z.B. sechs Takte bzw. 12 mm lang anhält, wird der Punkt 17 als Beginn des Effektes 13 definiert. Die Kurve 15 unterschreitet den Grenzdurchmesser DGR am Punkt 19. Die Unterschreitung hält bis zum Punkt 20 und somit über die vorbestimmte Garnlänge LV an. Damit wird der Punkt 19 als Ende des Effektes 13 definiert. Der Bereich zwischen Punkt 17 und Punkt 19 wird als Effekt 13 definiert. Der nach Punkt 19 beziehungsweise dem Ende des Effektes 13 folgende Abschnitt des Effektgarnes 1 wird solange als Steg 14 definiert, bis wieder ein Beginn eines Effektes 13 ermittelt wird.The determination of the effect diameter D E and the boundaries between effects 13 and webs 14 is determined on the basis of FIG. 3 explained. In the presentation of the Fig. 3 is the Yarn diameter D in percent over the yarn length L G shown as a curve 15. The curve 15 represents in the representation of Fig. 3 starting from the left to the point 16 the web diameter D ST . From the point 16, the curve 15 increases and passes at point 17, the value of the limit diameter D GR . At point 18, the predetermined yarn length L V has passed since reaching point 17. After a diameter increase of 15% is registered at point 17 and the exceeding of the limit diameter D GR over the predetermined length L V, for example, lasts six cycles or 12 mm long, the point 17 is defined as the beginning of the effect 13. The curve 15 falls below the limit diameter D GR at the point 19. The undershooting stops until point 20 and thus over the predetermined yarn length L V on. Thus, the point 19 is defined as the end of the effect 13. The area between point 17 and point 19 is defined as effect 13. The section of the effect yarn 1 following point 19 or the end of the effect 13 is defined as a web 14 until a start of an effect 13 is determined again.

Aus den vier größten Durchmessern 21 innerhalb des Effektes 13 wird ein arithmetischer Mittelwert gebildet. Dadurch ist die Angabe des Effektdurchmessers DE weitgehend unabhängig von natürlichen Duchmesserschwankungen im Effektbereich. Als Effektdurchmesser DE wird dieser arithmetische Mittelwert definiert.From the four largest diameters 21 within the effect 13 an arithmetic mean is formed. Thus, the indication of the effective diameter D E is largely independent of natural Duchmesserschwankungen in the effect area. The effect diameter D E is defined as this arithmetic mean.

Dem Effektdurchmesser DE wird ein vorbestimmter Toleranzbereich mit einer Reinigungsgrenze RGEO als oberer Grenzwert und mit einer Reinigungsgrenze RGEU als unterer Grenzwert zugeordnet. Entsprechend wird dem Stegdurchmesser DST ein vorbestimmter Toleranzbereich mit einer Reinigungsgrenze RGSTO als oberer Grenzwert und mit einer Reinigungsgrenze RGSTU als unterer Grenzwert zugeordnet.The effect diameter D E is assigned a predetermined tolerance range with a cleaning limit RG EO as the upper limit value and with a cleaning limit RG EU as the lower limit value. Accordingly, the web diameter D ST is a predetermined tolerance range with a cleaning limit RG STO as upper Limit and with a cleaning limit RG STU assigned as the lower limit.

Der Garnreiniger 5 ermittelt fortlaufend, ob die vom Meßkopf 6 detektierten Durchmesserwerte des Effektgarns 1 aus einem Bereich stammen, der als Steg 14 oder als Effekt 13 definiert ist. Stammen die Durchmesserwerte des Effektgarns 1 aus einem Bereich, der als Steg 14 definiert ist, werden diese Durchmesserwerte mit der dem Stegdurchmesser DST zugeordneten Grenzwerten, der Reinigungsgrenze RGSTO und der Reinigungsgrenze RGSTU verglichen. Stammen die Durchmesserwerte des Effektgarns 1 aus einem Bereich, der als Effekt 13 definiert ist, werden diese Durchmesserwerte mit der dem Effektdurchmesser DE zugeordneten Grenzwerten, der Reinigungsgrenze RGEO und der Reinigungsgrenze RGEU verglichen.The yarn cleaner 5 continuously determines whether the diameter values of the effect yarn 1 detected by the measuring head 6 originate from a region which is defined as a web 14 or as an effect 13. If the diameter values of the effect yarn 1 originate from a region which is defined as a web 14, these diameter values are compared with the limit values assigned to the web diameter D ST , the cleaning limit RG STO and the cleaning limit RG STU . If the diameter values of the effect yarn 1 originate from a region which is defined as effect 13, these diameter values are compared with the limit values associated with the effect diameter D E , the cleaning limit RG EO and the cleaning limit RG EU .

Alternativ kann der Garnreiniger 5 so eingerichtet sein, dass alternativ entweder nur Fehler in Stegbereichen oder nur Fehler in Effektbereichen ausgereinigt werden.Alternatively, the yarn cleaner 5 may be arranged so that either only defects in land areas or only defects in effect areas are cleaned out.

In einer ersten Ausbildung ist der Garnreiniger 5 so eingerichtet, dass die Überschreitung dieser Grenzwerte bzw. Reinigungsgrenzen als untolerierbarer Fehler registriert und dieser herausgeschnitten wird.In a first embodiment of the yarn cleaner 5 is set up so that the exceeding of these limits or cleaning limits registered as an untolerable error and this is cut out.

In einer zweiten Ausbildung ist der Garnreiniger 5 alternativ so eingerichtet, dass bei Überschreitung dieser Grenzwerte bzw. Reinigungsgrenzen detektiert wird, über welche Garnlänge die Überschreitung andauert. Mittels einer an sich bekannten zweidimensionalen Klassiermatrix, auch Reinigermatrix genannt, wird entschieden, ob ein untolerierbarer Fehler vorliegt, und auf diese Weise die Fehlerlängen in die Bestimmung der Reinigungsgrenzen einbezogen. Eine Klassiermatrix ist in einer Dimension in Längenbereiche und in der anderen Dimension in Durchmesserbereiche unterteilt und bildet durch Kombination eines Längenbereiches mit einem Durchmesserbereich jeweils eine Klasse. Das Reinigen von Garn nach Klassen ist beispielsweise aus der Literaturstelle "Vollständiges System zur Qualitätssicherung in der Spulerei", Melliand - Sonderdruck Oktober 1992, seit langem bekannt.In a second embodiment, the yarn cleaner 5 is alternatively set up so that when these limit values or cleaning limits are exceeded, it is detected over which yarn length the exceeding continues. By means of a known two-dimensional classifying matrix, also called a cleaner matrix, it is decided whether there is an untolerable error, and in this way the error lengths are included in the determination of the cleaning limits. A classifying matrix is divided into length ranges in one dimension and into diameter ranges in the other dimension and forms a class by combining a length range with a diameter range. The cleaning of yarn according to classes is known, for example, from the reference "Complete system for quality assurance in winding", Melliand - reprint October 1992, for a long time.

Weitere Ausbildungen des Garnreinigers im Rahmen der Erfindung sind möglich und nicht auf das dargestellte Ausführungsbeispiel beschränkt.Further embodiments of the yarn cleaner in the invention are possible and not limited to the illustrated embodiment.

Claims (10)

  1. Yarn clearer for clearing out defects from a yarn, in the measuring head of which at least one yarn parameter is measured, wherein for the yarn parameter clearing limits are determined, the exceeding of which signals the presence of a defect in the yarn, for which purpose the measured values of the yarn parameter are compared with the clearing limits and intolerable defects are cut out from the yarn, characterised in that the yarn clearer is set up for cleaning fancy yarn (1), wherein the fancy yarn (1) is formed from an alternating alignment of webs (14) and effects (13) consisting of predetermined thickenings, in that at least one value of the yarn parameter is predetermined for webs (14) and at least one value of the yarn parameter is predetermined for the effects (13) of the fancy yarn (1), in that a predetermined tolerance range is allocated to the value of the yarn parameter for the effect with an upper cleaning limit (RGEO) which is greater than the value of the yarn parameter for effects (13) as the upper limit value, and with a lower cleaning limit (RGEU) which lies below the value of the yarn parameter for effects (13) as a lower limit value, in that a predetermined tolerance range is allocated to the value of the yarn parameter for the web with an upper cleaning limit (RGSTO), which lies above the value of the yarn parameter for webs (14) as an upper limit value and with a lower cleaning limit (RGSTU) which lies below the value of the yarn parameter for webs (14) as the lower limit value, in that detected yarn parameter values from a web area are compared with the limit values assigned to the web parameter and in that detected yarn parameter values from an effect range are compared with the limit values allocated to the effect parameter.
  2. Yarn clearer according to claim 1, characterised in that the yarn clearer (5) is set up to reset yarn clearer functions, known per se, in such a way that at least one of the following defects is detectable:
    short thick point, long thick point,
    short thin point, long thin point,
    periodically recurring defects.
  3. Yarn clearer according to either of claims 1 or 2, characterised in that the yarn clearer (5) is set up in such a way that, alternatively, either only defects in the web regions are cleared out or only defects in the effect regions are cleared out.
  4. Yarn clearer according to either of claims 1 or 2, characterised in that the yarn parameter is the diameter of the fancy yarn (1), in that the clearing limits of the yarn clearer (5) are matched to at least one diameter value for the effect thickness and to at least one diameter value for the web thickness.
  5. Yarn clearer according to claim 4, characterised in that the yarn clearer (5) is set up in such a way that it determines over a predetermined yarn length the average diameter values of the webs (14) and the average diameter values of the effects (13), and in that the average diameter values are determined at least at the beginning of the measurement.
  6. Yarn clearer according to either of claims 4 or 5, characterised in that the defect lengths are included in the determination of the clearing limits.
  7. Yarn clearer according to any one of claims 4 to 6, characterised in that to determine the average value of the web diameter DST it initially forms an arithmetic average value of the yarn diameter from a predetermined length of fancy yarn (1) as a reference diameter, subtracts the reference diameter from the individual values of the yarn diameter and forms the average value of the web diameter DST as the arithmetic average value of all the negative differential values, which have been measured adjacent to other negative differential values.
  8. Yarn clearer according to any one of claims 4 to 7, characterised in that the yarn clearer (5) is set up such that it determines the effect region, in that the beginning of the effect (13) is defined by fulfilling a first criterion and the end of the effect is defined by fulfilling a second criterion, between the beginning and the end of the effect (13) a specifiable number of largest diameters is determined, an arithmetic average value is formed from the diameters determined, which is specified as the diameter of the effect (13) and the region of the fancy yarn (1) outside the effect (13) is defined as the web region.
  9. Yarn clearer according to claim 8, characterised in that the diameter DE of the effect (13) is formed as the average diameter value from the four largest diameters between the beginning and end of the effect (13).
  10. Yarn clearer according to either of claims 8 or 9, characterised in that the first criterion is to be considered exceeding a limit diameter DGR, which is greater by a defined amount than the average value of the web diameter DST, and in that the exceeding continues over a predetermined yarn length LV1 and in that the second criterion is considered to be falling below the limit diameter DGR and the falling below continues over the predetermined yarn length LV2.
EP04765945A 2003-11-10 2004-10-13 Yarn cleaner Not-in-force EP1685054B1 (en)

Applications Claiming Priority (2)

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DE10352429A DE10352429A1 (en) 2003-11-10 2003-11-10 yarn clearer
PCT/EP2004/011451 WO2005047155A1 (en) 2003-11-10 2004-10-13 Yarn cleaner

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EP1685054A1 EP1685054A1 (en) 2006-08-02
EP1685054B1 true EP1685054B1 (en) 2008-05-28

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EP04765945A Not-in-force EP1685054B1 (en) 2003-11-10 2004-10-13 Yarn cleaner

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US (1) US7424800B2 (en)
EP (1) EP1685054B1 (en)
CN (1) CN100415622C (en)
DE (2) DE10352429A1 (en)
WO (1) WO2005047155A1 (en)

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Also Published As

Publication number Publication date
CN100415622C (en) 2008-09-03
US7424800B2 (en) 2008-09-16
CN1867508A (en) 2006-11-22
DE10352429A1 (en) 2005-06-23
DE502004007304D1 (en) 2008-07-10
WO2005047155A1 (en) 2005-05-26
US20070119144A1 (en) 2007-05-31
EP1685054A1 (en) 2006-08-02

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