EP1725488A1 - Crosswound bobbin and associated production method - Google Patents

Crosswound bobbin and associated production method

Info

Publication number
EP1725488A1
EP1725488A1 EP05715561A EP05715561A EP1725488A1 EP 1725488 A1 EP1725488 A1 EP 1725488A1 EP 05715561 A EP05715561 A EP 05715561A EP 05715561 A EP05715561 A EP 05715561A EP 1725488 A1 EP1725488 A1 EP 1725488A1
Authority
EP
European Patent Office
Prior art keywords
thread
bobbin
pitch angle
wound
cross
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.)
Granted
Application number
EP05715561A
Other languages
German (de)
French (fr)
Other versions
EP1725488B1 (en
Inventor
Gerd Stahlecker
Gernot SCHÄFFLER
Christoph RIETHMÜLLER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deutsche Institute fuer Textil und Faserforschung Stuttgart
Original Assignee
Deutsche Institute fuer Textil und Faserforschung Stuttgart
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Deutsche Institute fuer Textil und Faserforschung Stuttgart filed Critical Deutsche Institute fuer Textil und Faserforschung Stuttgart
Publication of EP1725488A1 publication Critical patent/EP1725488A1/en
Application granted granted Critical
Publication of EP1725488B1 publication Critical patent/EP1725488B1/en
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Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H55/00—Wound packages of filamentary material
    • B65H55/04—Wound packages of filamentary material characterised by method of winding
    • 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 cross-wound bobbin which can be pulled off overhead and a method for its production in which at least one thread is wound with a pitch angle which is variable during the winding operation.
  • Cross-wound bobbins are supply bobbins that can serve as templates for weaving or knitting machines in further processing. In contrast to disc coils, they have a self-supporting cross wrap and have no end walls. A thread is wound helically with a relatively large pitch angle so that the threads cross each other several times and the individual thread layers stabilize each other.
  • the invention is based on the object of further improving the running behavior of a cross-wound bobbin and at the same time achieving an increase in the bobbin density, or increasing the thread length stored in the cross-wound bobbin with the same external dimensions.
  • the object is achieved in that thread layers with parallel windings are present at certain intervals.
  • the object is achieved in that the pitch angle, seen over several thread layers, is increased on average with an increasing bobbin diameter.
  • certain diameter ranges of the cross-winding are wound with a varying traverse stroke. This further improves the running properties of the cross winding spool.
  • the combination of the aforementioned measures with the measures from WO 02/060800 A1 is particularly advantageous. It is advantageous to produce the cross wrap on a single-maneuvering machine. In contrast, it is irrelevant whether it is wound, for example, from a yarn, a thread, a filament or even from a double thread.
  • FIG. 1 shows a schematic view of a package during winding with traversing over the entire width of the package
  • FIG. 2 shows the velocity vectors and the gradient angle
  • FIGS. 3 and 4 each show a view of a cross winding bobbin when pulled off overhead
  • FIG. 5 shows a schematic view of a cross winding spool during winding with a varying traverse stroke
  • Figure 6 is a schematic view of a cross winding spool when winding with parallel windings.
  • Figure 1 shows a cross winding spool 1 in its manufacture.
  • a bobbin tube 2 rotates in the direction R around its axis of symmetry 3 and a thread 4 is fed in the direction Z at a constant delivery speed.
  • the thread 4 is simultaneously displaced parallel to the axis of symmetry 3 along the laying direction V when winding onto the bobbin tube 2.
  • the shift is carried out by a known traversing device, indicated here by the traversing thread guide 5, which moves at a traversing speed.
  • the thread 4 is wound helically with a pitch angle ⁇ .
  • the definition of the pitch angle ⁇ is shown in FIG. 2.
  • the vectors of the delivery speed v z and the traversing speed v v are plotted here and show the relationship to the pitch angle ⁇ .
  • the pitch angle ⁇ can be influenced by changing the traversing speed v.
  • the traversing thread guide 5 is moved back and forth with the stroke Hi in and against the laying direction V. With every movement along the Hi line, a thread layer is created.
  • the thread 4 of the outermost, completely finished thread layer is designated by 6.
  • the thread layer 6 extends from the reversal point 7 on one spool side 8 to the second reversal point 9 on the other spool side 10.
  • the entirety of all thread layers forms the cross wrap 11 with the diameter Di and the width B.
  • the stroke i becomes, except for a slight stroke breathing , kept essentially constant, so that the width B of the cross winder 11 that is formed corresponds approximately to the stroke Hi.
  • FIGS. 3 and 4 show the situation when a cross winding bobbin 1 is drawn off overhead.
  • the thread 4 detaches from the cross winding 11 at a detachment point 12 and is drawn off in direction A by the draw-off eyelet 13 at a constant speed.
  • the cross winding spool 1 and the trigger eye 13 are stationary in the room.
  • the thread 4 rotates in the direction W around the cross wrap 11 and the free piece of thread between the detachment point 12 and the draw-off eye 13 forms the thread balloon 14, the detachment point 12 moves in the direction P along the cross wrap 11.
  • the diameter D 2 of the cross wrap 11 decreases, the diameter increases Angular velocity of the thread balloon 14.
  • angular velocity influences the shape of the thread balloon 14. It determines whether there is a sliding trigger, a single, double or triple balloon. Furthermore, it is known that the angular velocity depends on the direction of movement P of the detachment point 12.
  • FIG. 3 shows the situation in which the detachment point 12 moves in the direction P from the head side 15 of the cross wrap 11 facing the draw-off eyelet 13 to the foot side 16.
  • FIG. 4 shows a view of the cross winding bobbin 1, in which the detachment point 12 moves in the direction P 'towards the head side 15.
  • the thread layer 6 'drawn off here should be the thread layer which was located directly below the thread layer 6 drawn off in FIG. 3.
  • the diameter D 2 of the cross wrap 11 is the same size and thus the angular velocity resulting from the diameter D 2 should be the same size.
  • the angular speed of the thread balloon 14 at the moment shown in FIG. 3 is higher than in the situation according to FIG. 4. This is due to the fact that the thread balloon 14 is enlarged by the movement of the detachment point 12 in FIG. 3.
  • the traversing thread guide 5 When winding the cross winding bobbin 1, the traversing thread guide 5 is not guided with the traversing stroke ⁇ over the entire width B, but is moved back and forth only with the reduced traversing stroke H 2 . To produce a cross wrap 11 with the width B, this traversing stroke H 2 is now shifted continuously or stepwise along the coil width.
  • the distance L fluctuates in each thread layer only with the smaller amount H 2 . This leads to a homogenization of the thread balloon 14.
  • the change 'of the distance L by the amount B now takes place so slowly that they do not adversely affect the deduction conditions. This measure is particularly effective in small diameter ranges, with diameters below 200 to 300 mm, because the folding processes of the thread balloon 14 take place below this diameter range. Above 200 to 300 mm, the traversing stroke can easily be increased to the amount Hi, since a relatively stable and insensitive single balloon is then formed when the overhead is pulled off.
  • the diameter D 3 of the cross wrap 11 is still relatively small and the supporting effect of the coil sleeve 2 is still relatively large.
  • the pitch angle ⁇ is a decisive measure for stability. If the pitch angle ⁇ is too small, windings lying on the coil sides 8, 10 can slip and form unwanted loose thread loops, the so-called strikers.
  • the supporting effect of the bobbin tube 2 can be advantageously used if the pitch angle ⁇ is kept small with the small diameter D 3 and thus increases the thread length stored in a thread layer. Only with a larger diameter D ⁇ is the pitch angle ⁇ increased.
  • the bobbin density or the wound thread length can be increased without loss of stability.
  • FIG. 6 shows a representation of a thread layer with parallel windings 17 on a cross winding spool 1.
  • Parallel windings 17 can be used particularly advantageously as protective windings for separating different series of thread layers with a reduced and shifted traversing stroke H 2 according to FIG. 5.
  • parallel windings 17 enable the maximum thread length to be stored in one thread layer and thus likewise increase the bobbin density. To avoid strikers, the parallel windings 17 should only begin at a distance a from the coil side 8 or end at a distance b in front of the coil side 10.
  • the pitch angle ⁇ is almost zero, which means that the angular velocity of the thread balloon 14 does not practically change when the thread is pulled off, depending on the direction of movement P of the separation point.
  • the layer arrangement can advantageously be controlled such that when the finished cross winding bobbin 1 is taken off overhead, the detachment point 12 according to FIG. 3 moves when a thread layer with parallel windings 17 is drawn off. The increase in the angular velocity of the thread balloon 14 can thus be further reduced.

Abstract

The invention relates to an overhead unwinding crosswound bobbin (1) and to an associated production method, in which the thickness of the finished crosswound bobbin (1) is increased and the sequence of operations in further processing is optimised. To achieve this, in one embodiment the yarn is wound in parallel convolutions (17) that are a distance apart. In another embodiment, the yarn (4) is wound onto a bobbin with a small diameter (D) at a more acute inclination angle than for a bobbin with a larger diameter (D). In addition, a traversing stroke (H) that is reduced in relation to the bobbin width (B) is displaced along the bobbin width (B).

Description

Kreuzwickelspule und Verfahren zur Herstellung Cross winding bobbin and manufacturing method
Die Erfindung betrifft eine über Kopf abziehbare Kreuzwickelspule und ein Verfahren zu ihrer Herstellung, bei dem wenigstens ein Faden mit einem während des Aufwickelvorgangs variablen Steigungswinkel aufgewickelt wird.The invention relates to a cross-wound bobbin which can be pulled off overhead and a method for its production in which at least one thread is wound with a pitch angle which is variable during the winding operation.
Kreuzwickelspulen sind Vorratspulen, die in der Weiterverarbeitung als Vorlage für Web- oder Strickmaschinen dienen können. Sie weisen im Gegensatz zu Scheibenspulen einen selbsttragenden Kreuzwickel auf und haben keine endseitigen Wände. Ein Faden wird mit relativ großem Steigungswinkel schraubenlinienförmig aufgewickelt, damit die Fäden sich mehrfach überkreuzen und die einzelnen Fadenlagen sich gegenseitig stabilisieren.Cross-wound bobbins are supply bobbins that can serve as templates for weaving or knitting machines in further processing. In contrast to disc coils, they have a self-supporting cross wrap and have no end walls. A thread is wound helically with a relatively large pitch angle so that the threads cross each other several times and the individual thread layers stabilize each other.
Aus der WO 02/060800 A1 sind die Probleme beim Überkopfabzug einer Kreuzwickelspule bekannt. Die Umlaufgeschwindigkeit des sich bei konstanter Abzugsgeschwindigkeit des Fadens bildenden Fadenballons variiert in Abhängigkeit von Spulendurchmesser und Bewegungsrichtung des Ablösepunktes des Fadens vom Kreuzwickel. Die Schwankungen der Umlaufgeschwindigkeit führen bei gewissen Durchmessern zu einem ständigen Umklappen des Fadenballons zwischen einem Einfach- und Zweifach-Ballon bzw. zwischen einem Zweifach- und Dreifach-Ballon. Das Umklappen des Fadenballons verursacht sprunghafte Änderungen der Fadenspannung und kann dadurch Fadenbrüche auslösen. In der Praxis wird die Abzugsgeschwindigkeit durch diese Spannungsspitzen begrenzt. Zur Verringerung der Fadenspannungsschwankungen ist aus der WO 02/060800 A1 bekannt, den Steigungswinkel in Abhängigkeit von der Verlegerichtung zu variieren.From WO 02/060800 A1 the problems with the overhead take-off of a cross-wound bobbin are known. The rotational speed of the thread balloon forming at a constant pull-off speed of the thread varies depending on the bobbin diameter and the direction of movement of the point of detachment of the thread from the cross wrap. With certain diameters, the fluctuations in the circulating speed result in the thread balloon constantly being folded over between a single and double balloon or between a double and triple balloon. Folding the thread balloon causes sudden changes in the thread tension and can cause thread breaks. In practice, the withdrawal speed is limited by these voltage peaks. To reduce the thread tension fluctuations, it is known from WO 02/060800 A1 to vary the pitch angle depending on the laying direction.
Der Erfindung liegt die Aufgabe zu Grunde, das Ablaufverhalten einer Kreuzwickelspule weiter zu verbessern und gleichzeitig eine Steigerung der Spulendichte zu erreichen, bzw. die im Kreuzwickel gespeicherte Fadenlänge bei gleichen Außenabmessungen zu erhöhen. Die Aufgabe wird bei einer Variante dadurch gelöst, dass in gewissen Abständen Fadenlagen mit Parallelwindungen vorhanden sind.The invention is based on the object of further improving the running behavior of a cross-wound bobbin and at the same time achieving an increase in the bobbin density, or increasing the thread length stored in the cross-wound bobbin with the same external dimensions. In one variant, the object is achieved in that thread layers with parallel windings are present at certain intervals.
Bei einer anderen Variante wird die Aufgabe wird dadurch gelöst, dass der Steigungswinkel im Durchschnitt, über mehrere Fadenlagen gesehen, mit größer werdendem Spulendurchmesser vergrößert wird. Eine Kombination beider Varianten ist selbstverständlich möglich.In another variant, the object is achieved in that the pitch angle, seen over several thread layers, is increased on average with an increasing bobbin diameter. A combination of both variants is of course possible.
Bei kleinen Spulendurchmessern ist die Umlaufgeschwindigkeit des Fadenballons und somit die Fadenspannung wesentlich höher als bei großen Durchmessern. Deshalb führen Schwankungen der Umlaufgeschwindigkeit des Fadenballons hier besonders schnell zu Fadenbrüchen und sollten deswegen so gering wie möglich sein. Je kleiner der Steigungswinkel ist, desto kleiner ist auch die Schwankung der Umlaufgeschwindigkeit von Lage zu Lage. Ein kleinerer Steigungswinkel führt also zu einem besseren Ablaufverhalten. Außerdem erhöht sich die Spulendichte. Der Extremfall sind Parallelwindungen. Hierbei ist die Umlaufgeschwindigkeit des Fadenballons praktisch konstant und die Spulendichte wird maximal. Ein gleichmäßiger und relativ kleiner Steigungswinkel über den gesamten Durchmesserbereich der Kreuzwickelspule hat den Nachteil, dass die Stabilität der fertigen Spule bei der Handhabung nicht mehr gewährleistet ist. Für eine gute Stabilität des Kreuzwickels ist ein ausreichend großer Steigungswinkel insbesondere im äußeren Durchmesserbereich erforderlich. Deshalb ist für einen optimalen Spulenaufbau ein von innen nach außen ansteigender Steigungswinkel besonders vorteilhaft.With small bobbin diameters, the rotational speed of the thread balloon and thus the thread tension is much higher than with large diameters. Therefore, fluctuations in the rotational speed of the thread balloon lead here particularly quickly to thread breaks and should therefore be as low as possible. The smaller the pitch angle, the smaller the fluctuation of the speed of rotation from layer to layer. A smaller pitch angle therefore leads to better drainage behavior. The coil density also increases. The extreme case is parallel windings. Here, the rotational speed of the thread balloon is practically constant and the bobbin density becomes maximum. A uniform and relatively small pitch angle over the entire diameter range of the cross-wound bobbin has the disadvantage that the stability of the finished bobbin during handling is no longer guaranteed. A sufficiently large pitch angle, especially in the outer diameter range, is required for good stability of the cross wrap. For this reason, a pitch angle increasing from the inside to the outside is particularly advantageous for an optimal coil structure.
Genauso vorteilhaft für einen optimalen Spulenaufbau ist es, in gewissen Abständen Fadenlagen mit Parallelwindungen einzubringen. Diese tragen zur Erhöhung der Spulendichte bei, ohne dass sie den Nachteil einer reinen Parallelwicklung haben würden, denn die Lagen mit Parallelwindungen sind durch Lagen mit größerem Steigungswinkel eingeschlossen, so dass ein Verhaken der Fäden wirkungsvoll verhindert wird.It is just as advantageous for an optimal bobbin build-up to insert thread layers with parallel turns at certain intervals. These contribute to increasing the bobbin density without having the disadvantage of a pure parallel winding, because the layers with parallel turns are enclosed by layers with a larger pitch angle, so that the threads are effectively prevented from getting caught.
In weiterer vorteilhafter Ausgestaltung der Erfindung ist es vorgesehen, gewisse Durchmesserbereiche des Kreuzwickels mit variierendem Changierhub aufzuwickeln. Dies verbessert die Ablaufeigenschaften der Kreuzwickelspule weiter.In a further advantageous embodiment of the invention, it is provided that certain diameter ranges of the cross-winding are wound with a varying traverse stroke. This further improves the running properties of the cross winding spool.
Besonders vorteilhaft ist die Kombination der vorgenannten Maßnahmen mit den Maßnahmen aus der WO 02/060800 A1. Es ist vorteilhaft, den Kreuzwickel auf einer Maschine mit Einzelchangierung herzustellen. Dagegen ist es unerheblich, ob er beispielsweise aus einem Garn, einem Zwirn, einem Filament oder sogar aus einem Doppelfaden gewickelt wird.The combination of the aforementioned measures with the measures from WO 02/060800 A1 is particularly advantageous. It is advantageous to produce the cross wrap on a single-maneuvering machine. In contrast, it is irrelevant whether it is wound, for example, from a yarn, a thread, a filament or even from a double thread.
Weitere Vorteile und Merkmale der Erfindung ergeben sich aus der nachfolgenden Beschreibung der Ausführungsbeispiele.Further advantages and features of the invention result from the following description of the exemplary embodiments.
Es zeigen:Show it:
Figur 1 eine schematische Ansicht einer Kreuzspule beim Bewickeln mit Changierung über die gesamte Spulenbreite,FIG. 1 shows a schematic view of a package during winding with traversing over the entire width of the package,
Figur 2 eine Darstellung der Geschwindigkeitsvektoren und des Steigungswinkels,FIG. 2 shows the velocity vectors and the gradient angle,
Figuren 3 und 4 jeweils eine Ansicht einer Kreuzwickelspule beim Abziehen über Kopf,FIGS. 3 and 4 each show a view of a cross winding bobbin when pulled off overhead,
Figur 5 eine schematische Ansicht einer Kreuzwickelspule beim Bewickeln mit variierendem Changierhub,FIG. 5 shows a schematic view of a cross winding spool during winding with a varying traverse stroke,
Figur 6 eine schematische Ansicht einer Kreuzwickelspule beim Bewickeln mit Parallelwindungen.Figure 6 is a schematic view of a cross winding spool when winding with parallel windings.
Figur 1 zeigt eine Kreuzwickelspule 1 bei ihrer Herstellung. Eine Spulenhülse 2 rotiert in Richtung R um ihre Symmetrieachse 3 und ein Faden 4 wird mit konstanter Liefergeschwindigkeit in Richtung Z zugeführt. Der Faden 4 wird beim Aufwickeln auf die Spulenhülse 2 gleichzeitig parallel zur Symmetrieachse 3 entlang der Verlegerichtung V verlagert. Die Verlagerung erfolgt durch eine bekannte Changiereinrichtung, hier angedeutet durch den Changierfadenführer 5, der sich mit einer Changiergeschwindigkeit bewegt. Durch die Überlagerung der Lieferung und der Changierbewegung wird der Faden 4 schraubenlinienförmig mit einem Steigungswinkel α aufgewickelt.Figure 1 shows a cross winding spool 1 in its manufacture. A bobbin tube 2 rotates in the direction R around its axis of symmetry 3 and a thread 4 is fed in the direction Z at a constant delivery speed. The thread 4 is simultaneously displaced parallel to the axis of symmetry 3 along the laying direction V when winding onto the bobbin tube 2. The shift is carried out by a known traversing device, indicated here by the traversing thread guide 5, which moves at a traversing speed. By superimposing the delivery and the traversing movement, the thread 4 is wound helically with a pitch angle α.
Die Definition des Steigungswinkels α ist in Figur 2 dargestellt. Hier sind die Vektoren der Liefergeschwindigkeit vz und der Changiergeschwindigkeit vv aufgetragen und zeigen den Zusammenhang zum Steigungswinkel α. Bei konstanter Liefergeschwindigkeit vz kann der Steigungswinkel α durch Veränderung der Changiergeschwindigkeit v beeinflusst werden. Der Changierfadenführer 5 wird mit dem Hub Hi in und entgegen der Verlegerichtung V hin und her bewegt. Bei jeder Bewegung entlang der Strecke Hi entsteht eine Fadenlage. Der Faden 4 der äußersten, komplett fertigen Fadenlage ist mit 6 bezeichnet. Die Fadenlage 6 reicht vom Umkehrpunkt 7 an der einen Spulenseite 8 bis zum zweiten Umkehrpunkt 9 an der anderen Spulenseite 10. Die Gesamtheit aller Fadenlagen bildet den Kreuzwickel 11 mit dem Durchmesser Di und der Breite B. Der Hub i wird, bis auf eine geringe Hubatmung, im Wesentlichen konstant gehalten, so dass die Breite B des entstehenden Kreuzwickels 11 in etwa dem Hub Hi entspricht.The definition of the pitch angle α is shown in FIG. 2. The vectors of the delivery speed v z and the traversing speed v v are plotted here and show the relationship to the pitch angle α. With a constant delivery speed v z , the pitch angle α can be influenced by changing the traversing speed v. The traversing thread guide 5 is moved back and forth with the stroke Hi in and against the laying direction V. With every movement along the Hi line, a thread layer is created. The thread 4 of the outermost, completely finished thread layer is designated by 6. The thread layer 6 extends from the reversal point 7 on one spool side 8 to the second reversal point 9 on the other spool side 10. The entirety of all thread layers forms the cross wrap 11 with the diameter Di and the width B. The stroke i becomes, except for a slight stroke breathing , kept essentially constant, so that the width B of the cross winder 11 that is formed corresponds approximately to the stroke Hi.
Die Figuren 3 und 4 zeigen die Situation beim Uberkopfabzug einer Kreuzwickelspule 1. Der Faden 4 löst sich vom Kreuzwickel 11 an einem Ablösepunkt 12 und wird durch die Abzugsöse 13 mit konstanter Geschwindigkeit in Richtung A abgezogen. Die Kreuzwickelspule 1 und die Abzugsöse 13 sind feststehend im Raum. Der Faden 4 rotiert in Richtung W um den Kreuzwickel 11 und das freie Fadenstück zwischen Ablösepunkt 12 und Abzugsöse 13 bildet den Fadenballon 14, dabei bewegt sich der Ablösepunkt 12 in Richtung P entlang des Kreuzwickels 11. Mit sinkendem Durchmesser D2 des Kreuzwickels 11 steigt die Winkelgeschwindigkeit des Fadenballons 14 an. Es ist aus der WO 02/060800 A1 bekannt, dass die Winkelgeschwindigkeit die Form des Fadenballons 14 beeinflusst. Sie bestimmt, ob ein gleitender Abzug, ein Einfach-, Zweifach- oder Dreifachballon vorliegt. Des Weiteren ist bekannt, dass die Winkelgeschwindigkeit von der Bewegungsrichtung P des Ablösepunktes 12 abhängt.FIGS. 3 and 4 show the situation when a cross winding bobbin 1 is drawn off overhead. The thread 4 detaches from the cross winding 11 at a detachment point 12 and is drawn off in direction A by the draw-off eyelet 13 at a constant speed. The cross winding spool 1 and the trigger eye 13 are stationary in the room. The thread 4 rotates in the direction W around the cross wrap 11 and the free piece of thread between the detachment point 12 and the draw-off eye 13 forms the thread balloon 14, the detachment point 12 moves in the direction P along the cross wrap 11. As the diameter D 2 of the cross wrap 11 decreases, the diameter increases Angular velocity of the thread balloon 14. It is known from WO 02/060800 A1 that the angular velocity influences the shape of the thread balloon 14. It determines whether there is a sliding trigger, a single, double or triple balloon. Furthermore, it is known that the angular velocity depends on the direction of movement P of the detachment point 12.
In Figur 3 ist die Situation dargestellt, in der sich der Ablösepunkt 12 in Richtung P von der der Abzugsöse 13 zugewandten Kopfseite 15 des Kreuzwickels 11 zu der Fußseite 16 bewegt.FIG. 3 shows the situation in which the detachment point 12 moves in the direction P from the head side 15 of the cross wrap 11 facing the draw-off eyelet 13 to the foot side 16.
Figur 4 zeigt eine Ansicht der Kreuzwickelspule 1, bei der sich der Ablösepunkt 12 in Richtung P' auf die Kopfseite 15 zubewegt. Die hier abgezogene Fadenlage 6' soll diejenige Fadenlage sein, die sich direkt unterhalb der in Figur 3 abgezogenen Fadenlage 6 befand. Unter dieser Voraussetzung kann angenommen werden, dass der Durchmesser D2 der Kreuzwickel 11 gleich groß ist, und somit die sich aus dem Durchmesser D2 ergebende Winkelgeschwindigkeit gleich groß sein müsste. Trotzdem ist bei gleicher Abzugsgeschwindigkeit die Winkelgeschwindigkeit des Fadenballons 14 in dem in Figur 3 dargestellten Moment höher als in der Situation nach Figur 4. Dies liegt darin begründet, dass sich der Fadenballon 14 durch die Bewegung des Ablösepunktes 12 in Figur 3 vergrößert. Da die Abzugsgeschwindigkeit konstant ist, muss die zur Vergrößerung des Fadenballons 14 benötigte Fadenlänge durch ein schnelleres Abwickeln vom Kreuzwickel 11 bereitgestellt werden. Nach der WO 02/060800 A1 ist vorgesehen, die Erhöhung der Winkelgeschwindigkeit in der in Figur 3 dargestellten Situation dadurch zu verringern, dass der Steigungswinkel α in dieser Fadenlage reduziert ist. Die Winkelgeschwindigkeitsschwankungen, die das unerwünschte Umklappen zwischen den verschiedenen Formen des Fadenballons 14 verursachen, sollen so vermindert werden.FIG. 4 shows a view of the cross winding bobbin 1, in which the detachment point 12 moves in the direction P 'towards the head side 15. The thread layer 6 'drawn off here should be the thread layer which was located directly below the thread layer 6 drawn off in FIG. 3. Under this condition, it can be assumed that the diameter D 2 of the cross wrap 11 is the same size and thus the angular velocity resulting from the diameter D 2 should be the same size. Nevertheless, with the same take-off speed, the angular speed of the thread balloon 14 at the moment shown in FIG. 3 is higher than in the situation according to FIG. 4. This is due to the fact that the thread balloon 14 is enlarged by the movement of the detachment point 12 in FIG. 3. Since the take-off speed is constant, the thread length required to enlarge the thread balloon 14 must be provided by unwinding from the cross-wrap 11 more quickly. According to WO 02/060800 A1, it is provided that the increase in the angular velocity in the situation shown in FIG. 3 is reduced by the fact that the Pitch angle α is reduced in this thread position. The angular velocity fluctuations that cause the undesired folding between the different shapes of the thread balloon 14 are to be reduced in this way.
Nach neuesten Erkenntnissen gibt es neben der Winkelgeschwindigkeit eine weitere Einflussgröße auf die Form des Fadenballons 14. Dies ist der Abstand L vom Ablösepunkt 12 zu der Abzugsöse 13. Eine Veränderung des Abstandes L verursacht auch bei konstantem Durchmesser D2 und konstanter Winkelgeschwindigkeit ein Umklappen der Form des Fadenballons 14. Unter Berücksichtigung dieser Erkenntnis ist eine Bewicklung der Kreuzwickelspule 1 mit dem Changierhub H1 über die gesamte Breite B nachteilig. Das Maß L schwankt um den relativ großen Betrag B in jeder Fadenlage. In Figur 5 ist dargestellt, wie sich dieser Nachteil vermeiden lässt. Beim Bewickeln der Kreuzwickelspule 1 wird der Changierfadenführer 5 nicht mit dem Changierhub ^ über die gesamte Breite B geführt, sondern nur mit dem verkleinerten Changierhub H2 hin und her bewegt. Zur Erzeugung eines Kreuzwickels 11 mit der Breite B wird nun dieser Changierhub H2 kontinuierlich oder schrittweise entlang der Spulenbreite verlagert. Beim Uberkopfabzug schwankt der Abstand L in jeder Fadenlage also nur noch mit dem geringeren Betrag H2. Dies führt zu einer Vergleichmäßigung des Fadenballons 14. Die Änderung ' des Abstandes L um den Betrag B erfolgt nun so langsam, dass sie die Abzugsverhältnisse nicht mehr negativ beeinflusst. Insbesondere in kleinen Durchmesserbereichen, bei Durchmessern unterhalb von 200 bis 300 mm ist diese Maßnahme wirkungsvoll, denn unterhalb dieses Durchmesserbereiches finden die Umklappvorgänge des Fadenballons 14 statt. Oberhalb von 200 bis 300 mm kann der Changierhub problemlos auf den Betrag Hi vergrößert werden, da sich dann beim Uberkopfabzug ein relativ stabiler und unempfindlicher Einfach-Ballon ausbildet.According to the latest findings, in addition to the angular velocity, there is a further influencing variable on the shape of the thread balloon 14. This is the distance L from the detachment point 12 to the draw-off eye 13. A change in the distance L causes the shape to flip over even with a constant diameter D 2 and constant angular velocity of the thread balloon 14. Taking this knowledge into account, winding the cross-wound bobbin 1 with the traverse stroke H 1 over the entire width B is disadvantageous. The dimension L fluctuates by the relatively large amount B in each thread layer. FIG. 5 shows how this disadvantage can be avoided. When winding the cross winding bobbin 1, the traversing thread guide 5 is not guided with the traversing stroke ^ over the entire width B, but is moved back and forth only with the reduced traversing stroke H 2 . To produce a cross wrap 11 with the width B, this traversing stroke H 2 is now shifted continuously or stepwise along the coil width. When pulling off overhead, the distance L fluctuates in each thread layer only with the smaller amount H 2 . This leads to a homogenization of the thread balloon 14. The change 'of the distance L by the amount B now takes place so slowly that they do not adversely affect the deduction conditions. This measure is particularly effective in small diameter ranges, with diameters below 200 to 300 mm, because the folding processes of the thread balloon 14 take place below this diameter range. Above 200 to 300 mm, the traversing stroke can easily be increased to the amount Hi, since a relatively stable and insensitive single balloon is then formed when the overhead is pulled off.
In Figur 5 wird außerdem der stabilisierende Einfluss der Spulenhülse 2 deutlich. Hier ist der Durchmesser D3 des Kreuzwickels 11 noch relativ klein und die Stützwirkung der Spulenhülse 2 noch relativ groß. Im Gegensatz dazu ist bei großem Durchmesser D wie in Figur 1 dargestellt, in hohem Maße erforderlich, dass sich der Kreuzwickel 11 selbst stabilisiert. Für die Stabilität ist der Steigungswinkel α ein entscheidendes Maß. Ist der Steigungswinkel α zu gering, können an den Spulenseiten 8,10 liegende Windungen abrutschen und dort unerwünschte lose Fadenschlaufen, die so genannten Abschläger, bilden. Die Stützwirkung der Spulenhülse 2 lässt sich vorteilhaft ausnutzen, wenn man den Steigungswinkel α beim kleinen Durchmesser D3 klein hält und so die in einer Fadenlage gespeicherte Fadenlänge erhöht. Erst mit größerem Durchmesser D^ wird auch der Steigungswinkel α vergrößert. Hierdurch lässt sich ohne Stabilitätseinbußen die Spulendichte bzw. die aufgewickelte Fadenlänge steigern. Selbstverständlich wird man den Steigungswinkel nicht fortwährend mit jeder Fadenlage vergrößern. Vielmehr wird man eine Kombination aller bekannten Maßnahmen zur Verbesserung der Ablaufeigenschaften anwenden. Das bedeutet, die oben genannte Vergrößerung des Steigungswinkels α mit steigendem Durchmesser ist als Vergrößerung des Mittelwertes zu sehen, den man aus den Steigungswinkeln mehrerer benachbarter Fadenlagen bildet.5 also shows the stabilizing influence of the coil sleeve 2. Here, the diameter D 3 of the cross wrap 11 is still relatively small and the supporting effect of the coil sleeve 2 is still relatively large. In contrast, with a large diameter D as shown in FIG. 1, it is highly necessary that the cross wrap 11 stabilize itself. The pitch angle α is a decisive measure for stability. If the pitch angle α is too small, windings lying on the coil sides 8, 10 can slip and form unwanted loose thread loops, the so-called strikers. The supporting effect of the bobbin tube 2 can be advantageously used if the pitch angle α is kept small with the small diameter D 3 and thus increases the thread length stored in a thread layer. Only with a larger diameter D ^ is the pitch angle α increased. As a result, the bobbin density or the wound thread length can be increased without loss of stability. Of course, you will not continuously increase the pitch angle with every thread layer. Rather, a combination of all known measures to improve the drainage properties will be used. This means that the above-mentioned increase in the lead angle α with increasing diameter can be seen as an increase in the mean value which is formed from the lead angles of several adjacent thread layers.
Figur 6 zeigt eine Darstellung einer Fadenlage mit Parallelwindungen 17 auf einer Kreuzwickelspule 1. Parallelwindungen 17 können insbesondere vorteilhaft als Schutzwindungen zur Trennung verschiedener Serien von Fadenlagen mit verkleinertem und verlagertem Changierhub H2 nach Figur 5 eingesetzt werden. Außerdem ermöglichen Parallelwindungen 17 das Speichern der maximalen Fadenlänge in einer Fadenlage und erhöhen somit ebenfalls die Spulendichte. Zur Vermeidung von Abschlägern sollten die Parallelwindungen 17 erst in einem Abstand a von der Spulenseite 8 beginnen bzw. schon in einem Abstand b vor der Spulenseite 10 enden.FIG. 6 shows a representation of a thread layer with parallel windings 17 on a cross winding spool 1. Parallel windings 17 can be used particularly advantageously as protective windings for separating different series of thread layers with a reduced and shifted traversing stroke H 2 according to FIG. 5. In addition, parallel windings 17 enable the maximum thread length to be stored in one thread layer and thus likewise increase the bobbin density. To avoid strikers, the parallel windings 17 should only begin at a distance a from the coil side 8 or end at a distance b in front of the coil side 10.
Bei Parallelwindungen 17 ist der Steigungswinkel α nahezu Null, dadurch ändert sich auch die Winkelgeschwindigkeit des Fadenballons 14 beim Abzug in Abhängigkeit von der Bewegungsrichtung P des Ablösepunktes praktisch nicht. Allerdings besteht beim Übereinanderwickeln von mehreren Fadenlagen mit Parallelwindungen 17 die Gefahr, dass sich Fäden 4 zwischen den darunter liegenden Windungen einklemmen. Deshalb ist es vorteilhaft, Fadenlagen mit Parallelwindungen 17 im Wechsel mit Fadenlagen mit großem Steigungswinkel α aufzuwickeln. Hierbei lässt sich die Lagenanordnung vorteilhafterweise so steuern, dass sich beim Uberkopfabzug der fertigen Kreuzwickelspule 1 der Ablösepunkt 12 gemäß Figur 3 bewegt, wenn eine Fadenlage mit Parallelwindungen 17 abgezogen wird. Die Erhöhung der Winkelgeschwindigkeit des Fadenballons 14 lässt sich so weiter verringern. In the case of parallel windings 17, the pitch angle α is almost zero, which means that the angular velocity of the thread balloon 14 does not practically change when the thread is pulled off, depending on the direction of movement P of the separation point. However, when several thread layers with parallel windings 17 are wound one on top of the other, there is a risk that threads 4 will get caught between the windings underneath. It is therefore advantageous to wind thread layers with parallel windings 17 alternating with thread layers with a large pitch angle α. Here, the layer arrangement can advantageously be controlled such that when the finished cross winding bobbin 1 is taken off overhead, the detachment point 12 according to FIG. 3 moves when a thread layer with parallel windings 17 is drawn off. The increase in the angular velocity of the thread balloon 14 can thus be further reduced.

Claims

Patentansprüche claims
1. Verfahren zur Herstellung einer über Kopf abziehbaren Kreuzwickelspule (1 ), bei dem wenigstens ein Faden (4) mit einem während des Aufwickelvorganges variablen Steigungswinkel (α) aufgewickelt wird, dadurch gekennzeichnet, dass in gewissen Zeitabständen eine oder mehrere Fadenlagen mit Parallelwindungen (17) erzeugt werden.1. A method for producing a cross-wound bobbin (1) which can be pulled off overhead, in which at least one thread (4) is wound with a pitch angle (α) which is variable during the winding process, characterized in that one or more thread layers with parallel windings (17 ) be generated.
2. Verfahren zur Herstellung einer über Kopf abziehbaren Kreuzwickelspule (1), bei dem wenigstens ein Faden (4) mit einem während des Aufwickelvorganges variablen Steigungswinkel (α) aufgewickelt wird, dadurch gekennzeichnet, dass der Steigungswinkel (α) im Durchschnitt, über mehrere Fadenlagen (6) gesehen, mit größer werdendem Spulendurchmesser (D) zunimmt.2. A method for producing a cross winding bobbin (1) which can be pulled off overhead, in which at least one thread (4) is wound with a pitch angle (α) which is variable during the winding process, characterized in that the pitch angle (α) averages over a plurality of thread layers (6) seen increases with increasing coil diameter (D).
3. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass die Parallelwindungen (17) mit einem Abstand (a) nach einer Spulenkante (8) beginnen und/oder mit einem Abstand (b) vor der anderen Spulenkante (10) enden.3. The method according to claim 1, characterized in that the parallel windings (17) begin with a distance (a) after a coil edge (8) and / or end with a distance (b) in front of the other coil edge (10).
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Steigungswinkel (α) über einen gewissen Zeitraum im Wesentlichen konstant gehalten wird und bei Erreichen eines bestimmten Spulendurchmessers (D) vergrößert wird, der dann wiederum über einen gewissen Zeitraum im Wesentlichen konstant gehalten wird.4. The method according to any one of claims 1 to 3, characterized in that the pitch angle (α) is kept substantially constant over a certain period of time and is increased when a certain coil diameter (D) is reached, which then in turn essentially over a certain period of time is kept constant.
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Faden (4) mit einem variierenden Changierhub (H) aufgewickelt wird.5. The method according to any one of claims 1 to 4, characterized in that the thread (4) is wound with a varying traverse stroke (H).
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass ein im Vergleich zur Spulenbreite (B) verkleinerter Changierhub (H) wenigstens zeitweise entlang der Spulenbreite (B) verlagert wird.6. The method according to any one of claims 1 to 5, characterized in that a traversing stroke (H) reduced in comparison to the coil width (B) is at least temporarily shifted along the coil width (B).
7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Steigungswinkel (α) mit wechselnder Verlegerichtung (V) variiert wird.7. The method according to any one of claims 1 to 6, characterized in that the pitch angle (α) is varied with changing laying direction (V).
8. Über Kopf abziehbare Kreuzwickelspule (1 ) mit wenigstens einem mit variablem Steigungswinkel (α) aufgewickelten Faden (4), dadurch gekennzeichnet, dass die Kreuzwickelspule (1) eine oder mehrere Fadenlagen mit Parallelwindungen (17) aufweist. 8. Cross-wound bobbin (1) with at least one thread (4) wound with a variable pitch angle (α), characterized in that the cross-wound bobbin (1) has one or more layers of threads with parallel windings (17).
9. Über Kopf abziehbare Kreuzwickelspule (1) mit wenigstens einem mit variablem Steigungswinkel (α) aufgewickelten Faden (4), dadurch gekennzeichnet, dass der Steigungswinkel (α) von innen liegenden Fadenlagen (6) im Durchschnitt, über mehrere Fadenlagen (6) gesehen, kleiner ist als von weiter außen liegenden Fadenlagen (6).9. Over-the-head cross winding spool (1) with at least one thread (4) wound with a variable pitch angle (α), characterized in that the pitch angle (α) seen from the inside of the thread layers (6) on average over several thread layers (6) , is smaller than from thread layers lying further out (6).
10. Kreuzwickelspule nach Anspruch 8, dadurch gekennzeichnet, dass die Parallelwindungen (17) mit einem Abstand (a) nach einer Spulenkante (8) beginnen und/oder mit einem Abstand (b) vor der anderen Spulenkante (10) enden.10. Cross winding bobbin according to claim 8, characterized in that the parallel windings (17) begin at a distance (a) after a coil edge (8) and / or end at a distance (b) in front of the other coil edge (10).
11. Kreuzwickelspule nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, dass der Steigungswinkel (α) über gewisse Bereiche von Fadenlagen (6) im Wesentlichen konstant ist, und dass der durchschnittliche Steigungswinkel (α) von einem innen liegenden Bereich kleiner ist als von einem weiter außen liegenden Bereich.11. Cross winding bobbin according to one of claims 8 to 10, characterized in that the pitch angle (α) is substantially constant over certain areas of thread layers (6) and that the average pitch angle (α) of an inner area is smaller than that of an outlying area.
12. Kreuzwickelspule nach einem der Ansprüche 8 bis 11 , dadurch gekennzeichnet, dass es Fadenlagen (6) gibt, die mit variierendem Changierhub (H) aufgewickelt sind.12. Cross winding bobbin according to one of claims 8 to 11, characterized in that there are thread layers (6) which are wound with a varying traverse stroke (H).
13. Kreuzwickelspule nach einem der Ansprüche 8 bis 12, dadurch gekennzeichnet, dass mit im Vergleich zur Spulenbreite (B) verkleinertem Changierhub (H) erzeugte Fadenlagen (6) wenigstens teilweise entlang der Spulenbreite (B) zueinander versetzt aufgewickelt sind.13. Cross winding bobbin according to one of claims 8 to 12, characterized in that thread layers (6) produced with a reduced traversing stroke (H) compared to the bobbin width (B) are wound at least partially offset with respect to one another along the bobbin width (B).
14. Kreuzwickelspule nach einem der Ansprüche 8 bis 13, dadurch gekennzeichnet, dass der Steigungswinkel ( ) mit wechselnder Verlegerichtung (V) variiert ist. 14. Cross winding bobbin according to one of claims 8 to 13, characterized in that the pitch angle () is varied with changing laying direction (V).
EP05715561A 2004-02-27 2005-02-25 Crosswound bobbin and associated production method Not-in-force EP1725488B1 (en)

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CN1934020A (en) 2007-03-21
US20080156917A1 (en) 2008-07-03
DE502005010264D1 (en) 2010-10-28
JP4863400B2 (en) 2012-01-25
EP1725488B1 (en) 2010-09-15
CN1934020B (en) 2010-12-08
ATE481347T1 (en) 2010-10-15
DE102004010824A1 (en) 2005-09-15
WO2005082758A1 (en) 2005-09-09
US7665682B2 (en) 2010-02-23

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