EP0562296B1 - Method for winding filamentary material, continuously fed at preferably constant speed, in a stepped precision winding and winding device for carrying out the method - Google Patents

Method for winding filamentary material, continuously fed at preferably constant speed, in a stepped precision winding and winding device for carrying out the method Download PDF

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Publication number
EP0562296B1
EP0562296B1 EP93102947A EP93102947A EP0562296B1 EP 0562296 B1 EP0562296 B1 EP 0562296B1 EP 93102947 A EP93102947 A EP 93102947A EP 93102947 A EP93102947 A EP 93102947A EP 0562296 B1 EP0562296 B1 EP 0562296B1
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EP
European Patent Office
Prior art keywords
winding
bobbin
drive
speed
thread guide
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Expired - Lifetime
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EP93102947A
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German (de)
French (fr)
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EP0562296A1 (en
Inventor
Heinz Hefert
Peter Siebertz
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Georg Sahm GmbH and Co KG
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Georg Sahm 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
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/38—Arrangements for preventing ribbon winding ; Arrangements for preventing irregular edge forming, e.g. edge raising or yarn falling from the edge
    • B65H54/381—Preventing ribbon winding in a precision winding apparatus, i.e. with a constant ratio between the rotational speed of the bobbin spindle and the rotational speed of the traversing device driving shaft
    • B65H54/383—Preventing ribbon winding in a precision winding apparatus, i.e. with a constant ratio between the rotational speed of the bobbin spindle and the rotational speed of the traversing device driving shaft in a stepped precision winding apparatus, i.e. with a constant wind ratio in each step
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/06—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers for making cross-wound packages
    • B65H54/08—Precision winding arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/40—Arrangements for rotating packages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a method for winding continuously, preferably at a constant speed, a thread-like winding material fed to a winding device in a graduated precision cross winding, in which the speed of the bobbin detects with a first sensor and the speed of the drive of the traversing thread guide with a second sensor, the speeds with each other compared and depending on which the drive of the traversing thread guide is regulated.
  • Thread-like winding material is understood to mean in particular yarns or tapes.
  • the winding direction for carrying out the method is provided with a drive for the bobbin and a first assigned sensor, with a drive for the traversing thread guide and a second assigned sensor and with a first controller for processing the signals of the two sensors for regulating the drive of the traversing thread guide.
  • the speed of the bobbin and the number of double strokes of the traversing thread guide form a fixed ratio, the so-called bobbin ratio.
  • the crossing angles necessarily change.
  • changing the crossing angle is only possible within certain limits in order not to endanger the stability of the coil. Therefore the achievable diameter ratio between a full and an empty spool is limited.
  • Precision cross-wound coils can however, be optimally adapted to the special requirements of the ware or its use.
  • the change in the bobbin ratio from one stage of the precision cross winding to the next is so small that the resulting change in the winding speed of the yarn or ribbon 3%, Preferably 0.3%, the mean wind speed does not exceed. This limits the change in wind speed. Due to the constant peripheral speed of the bobbin during the winding cycle, the change in the winding speed cannot be eliminated. This requires a very narrow gradation, so that the number of winding phases increases with a constant winding ratio in each case. By an abrupt change in the coil ratio during the coil build-up in several phases, however, the crossing angle can be kept within limits that are favorable for the coil build-up.
  • EP-A-0 150 771 also shows a method and a device of the type described at the outset, that is, the winding of winding material in a graduated precision cross winding, the speed of the bobbin being detected with a first sensor and the speed of the drive of the traversing thread guide with a second sensor , the speeds are compared with one another and the drive of the traversing thread guide is regulated as a function thereof. It is the object of the invention to create a bobbin in a precision cross winding with optimal properties with regard to the bobbin construction, in particular the mass distribution of the thread on the bobbin, and with regard to the bobbin winding. The thread should be wound onto the bobbin at a constant peripheral speed. The winding ratio is changed in many stages so that the crossing angle remains approximately constant.
  • EP-A-195 325 also assumes a constant bobbin circumferential speed when winding threads into cross-wound bobbins and reduces the speed of the traversing thread guide between a predetermined upper limit and a predetermined lower limit proportional to the decreasing spindle speed. When the lower limit is reached, the speed of the traversing thread guide is increased again up to the upper limit. This creates a precision cross winding with winding ratios reduced in steps. To improve the bobbin build-up, the upper and lower limits of the traversing speed are reduced or increased in the same direction during the winding cycle.
  • EP-A-194 524 also shows a method for winding threads in a graduated precision cross winding.
  • the bobbin ratios In order to achieve optimal thread placement on the bobbin, the bobbin ratios not only have to be precalculated with great accuracy, but must also be adhered to exactly. Since the electrical and electronic measurement and control technology, which are limited for the measurement of the rotational speeds and compliance with the proportionality between the spindle drive and the drive of the traversing thread guide, the modulation of the winding ratio in each winding phase is proposed to improve the winding structure.
  • the modulation width should be less than 0.1%.
  • DE-A-26 49 780 describes a winding machine for textile yarns in which the bobbin is driven on its circumference by means of a speed-controlled drive roller and the reverse thread shaft in which the traversing thread guide is moved is also speed-controlled. Both speeds are controlled by electronic control circuits and computers, which take into account, among other things, the mathematical relationships between winding speed, peripheral speed of the bobbin or drive roller and thread laying speed, so that the difference between thread speed and winding speed can be specified. With this device, the production of precision cross-wound bobbins with constant feed speed and constant thread tension during winding is possible.
  • preprogrammed jumps in the winding ratio can be carried out on the computer in order to avoid unfavorable regions of the crossing angles when the bobbin is full and empty.
  • the technical effort for these computer-controlled speeds of the driving roller and the reverse thread shaft is correspondingly high. Changes in the wind-up speed are not completely eliminated because a positive drive always has slippage.
  • the invention is based on the object, starting from a method and a winding device of the type described above, that is to say in a stepped precision cross winding, to avoid the disadvantages which are associated with a constant coil peripheral speed.
  • this is achieved in that the drive of the bobbin is regulated in such a way that the winding speed of the winding material on the bobbin corresponds to the speed of the continuously supplied winding material during the entire winding cycle, in that the drive of the bobbin is regulated in such a way by a thread tension transducer, preferably a dancer that in each winding phase with constant winding ratio, the decreasing winding speed caused by decreasing crossing angle is compensated for by a continuous increase in the speed of the bobbin, and that with every jump between two winding phases with constant winding ratio, the increasing winding speed caused by increasing the crossing angle is caused by a decrease in the winding angle Speed of the coil is compensated.
  • a thread tension transducer preferably a dancer that in each winding phase with constant winding ratio, the decreasing winding speed caused by decreasing crossing angle is compensated for by a continuous increase in the speed of the bobbin, and that with every jump between two winding phases with constant winding ratio, the increasing winding speed caused by increasing the crossing angle
  • the winding speed thus remains the same not only in the individual winding phases with a constant winding ratio, but also during the jumps between the individual winding phases, that is to say in the time in which one winding ratio is left and the other winding ratio is aimed for.
  • the new method is thus ideally suited for winding up items to be delivered continuously at a preferably constant speed, as is the case in particular with spun threads. This does not adversely affect the rinsed material. It always remains under a defined thread tension, so that all advantages of a stepped precision cross winding are achieved.
  • the conditions are due to the change in the crossing angle addressed.
  • the conditions that result from the increase in the diameter of the coil must of course also be taken into account. This influence is greater than the influence of changing the crossing angle.
  • Each updraft phase can be started with a matching starting crossing angle and ending with a matching ending crossing angle.
  • the crossing angle runs through a fixed, constant area in the area of each winding phase, which is decisive for the quality of the coil construction and the further processing properties of the coil.
  • a winding device suitable for carrying out the method is equipped with a drive for the bobbin and a first assigned sensor, with a drive for the traversing thread guide and a second assigned sensor and with a first controller for processing the signals of the two sensors for regulating the drive of the traversing thread guide .
  • a second controller for regulating the drive of the bobbin is designed in the sense of the winding speed of the continuously supplied winding material and connected to the drive of the bobbin.
  • the second controller is preceded by a thread tension transducer, preferably a dancer, which adjusts the rotational speed of the drive of the bobbin in the sense of the winding speed of the continuously supplied winding material via this second controller.
  • the drive of the winding spindle is adjusted so that the z. B. the tension of the thread measured by the dancer arm remains defined.
  • the drive for the coil can preferably consist of an axle drive. But it is also possible for Drive the coil to provide a drive roller, as is known per se.
  • the sensors are usually designed as tachometers
  • the sensors are now designed as pulse generators, with the computer each having a counter for each pulse generator.
  • the speeds of the drives can be recorded exactly, that is, much more precisely than with a tachometer.
  • a motor that can be regulated in terms of its speed can be provided, which is preceded by a control device. It is also possible to provide a motor which can be regulated in terms of its speed for driving the traversing thread guide and which is preceded by a control device. In this way it is possible to determine the speed of the traversing thread guide as a function of the speed of the drive of the bobbin in accordance with the desired winding ratio, and on the other hand to regulate the drive of the bobbin in the sense of the winding speed of the continuously fed winding material, even with changing crossing angles, to reach.
  • a three-phase motor 1 is illustrated in FIG. 1, via which the spindle 2, which is only symbolically indicated, is driven. It can be a direct axle drive or a drive roller drive.
  • a pulse generator 3 is assigned to the three-phase motor 1, with the aid of which the speed of the spindle 2 or the three-phase motor 1 can be determined exactly.
  • a three-phase motor 4 is provided, via which the traversing thread guide 5, which is only indicated, is driven.
  • a second pulse generator 6 is assigned to the traversing thread guide 5 or the three-phase motor 4, so that its speed or rotational speed can also be monitored very precisely.
  • Electrical lines 7 and 8 lead to a computer 9, each having a counter 10 and 11, a comparator 12 and a first controller 13.
  • a second controller 20 is provided, which can be designed as a PID controller. With the counter 11, the pulses of the pulse generator 3 are counted. The counter 10 counts the pulses from the pulse generator 6. The number of pulses is further processed in the comparator 12 and fed to the first controller 13.
  • a dancer 14 with a roller 15, over which the thread of the ware is passed, is connected upstream of the second controller 20.
  • a movement of the dancer 14 leads to a signal change which is fed to the second controller 20.
  • a first electrical line 16 leads from the second regulator 20 to the three-phase motor 1 via a regulator 17 designed as a frequency converter.
  • the second regulator 20 primarily regulates the three-phase motor 1 and thus the drive of the spindle 2 in the sense of the winding speed of the continuously at preferably constant speed supplied ware.
  • an electrical line 18 leads from the first controller 13 via a control device 19 designed as a frequency converter to the three-phase motor 4 of the drive of the traversing thread guide 5.
  • FIG. 2 shows a diagram to illustrate the constant length of winding material per unit of time (winding speed) wound up during the winding cycle.
  • winding speed the amount of the length of the reels per unit time L is always constant.
  • the circumferential speeds v U as well as the traversing speeds v C change in each winding phase with a constant winding ratio, and yet the length of the winding material per unit time L remains constant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Winding Filamentary Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)

Abstract

A method for winding filamentary winding material, continuously fed at a preferably constant speed to a winding device, in a stepped precision winding provides that the rotational speed of the bobbin (2) is detected by a first sensor (3) and the rotational speed of the drive (4) of the traversing thread guide (5) is detected by a second sensor (6), the rotational speeds are compared with one another and the drive (4) of the traversing thread guide (5) is regulated in dependence thereon. The drive (1) of the bobbin (2) is regulated in such a way that the winding speed of the winding material on the bobbin (2) corresponds to the speed of the continuously fed winding material during the entire winding trip. <IMAGE>

Description

Die Erfindung bezieht sich auf ein Verfahren zum Aufspulen kontinuierlich mit vorzugsweise konstanter Geschwindigkeit einer Spuleinrichtung zugeführtem, fadenförmigem Spulgut in gestufter Präzisionskreuzwicklung, in dem die Drehzahl der Spule mit einem ersten Fühler und die Drehzahl des Antriebs des Changierfadenführers mit einem zweiten Fühler erfaßt, die Drehzahlen miteinander verglichen und abhängig davon der Antrieb des Changierfadenführers geregelt wird. Unter fadenförmigem Spulgut werden insbesondere Garne oder Bändchen verstanden. Die Spulrichtung zur Durchführung des Verfahrens ist mit einem Antrieb für die Spule und einem ersten zugeordneten Fühler, mit einem Antrieb für den Changierfadenführer und einem zweiten zugeordneten Fühler und mit einem ersten Regler zur Verarbeitung der Signale der beiden Fühler zur Regelung des Antriebs des Changierfadenführers versehen.The invention relates to a method for winding continuously, preferably at a constant speed, a thread-like winding material fed to a winding device in a graduated precision cross winding, in which the speed of the bobbin detects with a first sensor and the speed of the drive of the traversing thread guide with a second sensor, the speeds with each other compared and depending on which the drive of the traversing thread guide is regulated. Thread-like winding material is understood to mean in particular yarns or tapes. The winding direction for carrying out the method is provided with a drive for the bobbin and a first assigned sensor, with a drive for the traversing thread guide and a second assigned sensor and with a first controller for processing the signals of the two sensors for regulating the drive of the traversing thread guide.

Die Herstellung von Spinnfasergarnen, Filamentgarnen u. dgl. erfolgt üblicherweise mit konstanter Geschwindigkeit, mit der sie der Spuleinrichtung zugeführt werden.The production of spun yarns, filament yarns and the like. The like. Usually takes place at a constant speed at which they are fed to the winding device.

Bei der Präzisionskreuzwicklung bildet die Drehzahl der Spule und die Anzahl der Doppelhübe des Changierfadenführers ein festes Verhältnis, das sog. Spulverhältnis. Mit steigendem Durchmesser der Spule ändern sich dabei notwendigerweise die Kreuzungswinkel. Die Änderung des Kreuzungswinkels ist jedoch nur innerhalb gewisser Grenzen möglich, um die Stabilität der Spule nicht zu gefährden. Deshalb ist das erreichbare Durchmesserverhältnis zwischen einer vollen und einer leeren Spule begrenzt. Präzisionskreuzgewickelte Spulen können jedoch optimal an die speziellen Anforderungen des Spulguts bzw. dessen Verwendung angepaßt werden.With the precision cross winding, the speed of the bobbin and the number of double strokes of the traversing thread guide form a fixed ratio, the so-called bobbin ratio. As the diameter of the coil increases, the crossing angles necessarily change. However, changing the crossing angle is only possible within certain limits in order not to endanger the stability of the coil. Therefore the achievable diameter ratio between a full and an empty spool is limited. Precision cross-wound coils can however, be optimally adapted to the special requirements of the ware or its use.

Bei der wilden Wicklung besteht keine Abhängigkeit, z. B. keine getriebliche Verbindung, zwischen dem Spulspindelantrieb und dem Antrieb des Changierfadenführers. Die Spule wird oft an ihrem Umfang mittels einer Treibwalze mit konstanter Umfangsgeschwindigkeit angetrieben. Die wilde Wicklung besitzt einen konstanten Kreuzungswinkel, der für die Stabilität der Spule förderlich ist. Das Durchmesserverhältnis zwischen voller und leerer Spule ist dabei unkritischer. Allerdings ändert sich bei einer wilden Wicklung laufend das Spulverhältnis. Bei bestimmten Werten für das Spulverhältnis wird das Spulgut in mehreren Lagen übereinander abgelegt, so daß sog. Spiegel oder Bilder entstehen. Die abgelegten Windungen sind vergleichsweise locker und führen Zu Störungen in der Weiterverarbeitung, so daß letztendlich hohe Fadenbruchzahlen entstehen können.In the wild winding there is no dependency, e.g. B. no gear connection between the winding spindle drive and the drive of the traversing thread guide. The coil is often driven at its circumference by means of a drive roller at a constant circumferential speed. The wild winding has a constant crossing angle, which is conducive to the stability of the coil. The diameter ratio between full and empty spool is less critical. However, the winding ratio changes continuously in the case of a wild winding. With certain values for the winding ratio, the material to be wound is placed in several layers one above the other, so that so-called mirrors or images are created. The stored turns are comparatively loose and lead to disruptions in further processing, so that ultimately high thread breakage numbers can occur.

Aus der EP-A- 55 849 ist ein Verfahren der eingangs beschriebenen Art und eine Spuleinrichtung zur Durchführung des Verfahrens bekannt, bei denen die gestufte Präzisionskreuzwicklung Anwendung findet. Die Spule wird dabei mittels einer Treibwalze an ihrem Umfang mit konstanter Geschwindigkeit angetrieben. Die Spulenumfangsgeschwindigkeit wird während der gesamten Spulreise konstant gehalten. Durch den sich innerhalb einer Aufwindephase mit konstantem Spulverhältnis ändernden Kreuzungswinkel ändert sich notwendigerweise die Aufwindegeschwindigkeit des Spulguts auf der Spule. Um zu große Unterschiede in der Aufwindegeschwindigkeit und deren nachteilige Auswirkungen auf die Qualität der Garne und des Spulenaufbaus zu vermeiden, wird vorgeschlagen, daß die Änderung der Spulverhältnisse von einer Stufe der Präzisionskreuzwicklung zur nächsten so gering ist, daß die dadurch bedingte Änderung der Aufwindegeschwindigkeit des Garns oder Bändchens 3 %, Vorzugsweise 0,3 %, der mittleren Aufwindegeschwindigkeit nicht überschreitet. Damit wird die Änderung der Aufwindegeschwindigkeit zwar begrenzt. Infolge der konstant gehaltenen Umfangsgeschwindigkeit der Spule während der Spulreise läßt sich jedoch die Änderung der Aufwindegeschwindigkeit nicht beseitigen. Damit wird eine sehr enge Abstufung erforderlich, so daS sich die Anzahl der Aufwindephasen mit jeweils konstantem Spulverhältnis vergrößert. Durch eine sprungweise Änderung des Spulverhältnisses während des Spulenaufbaus in mehreren Phasen kann jedoch der Kreuzungswinkel in für den Spulenaufbau günstigen Grenzen gehalten werden. Beim Sprung von einer Aufwindephase zur nächsten wird der Kreuzungswinkel wieder vergrößert. Dabei erhöht sich notwendigerweise auch die Aufwindegeschwindigkeit, was in nachteiliger Weise zur Veränderung der Fadenspannung führt. Da sich bei der bekannten gestuften Präzisionskreuzwicklung mit konstanter Umfangsgeschwindigkeit der Spule unterschiedliche Aufwindegeschwindigkeiten nicht vermeiden lassen, wird zur Behebung der damit verbundenen Nachteile eine Begrenzung der zulässigen Änderung der Aufwindegeschwindigkeit vorgeschlagen.From EP-A-55 849 a method of the type described in the introduction and a winding device for carrying out the method are known, in which the stepped precision cross winding is used. The spool is driven at a constant speed on its circumference by means of a drive roller. The bobbin peripheral speed is kept constant during the entire bobbin travel. As a result of the crossing angle changing within a winding phase with a constant winding ratio, the winding speed of the items to be wound on the bobbin necessarily changes. In order to avoid excessive differences in the winding speed and their adverse effects on the quality of the yarns and the bobbin construction, it is proposed that the change in the bobbin ratio from one stage of the precision cross winding to the next is so small that the resulting change in the winding speed of the yarn or ribbon 3%, Preferably 0.3%, the mean wind speed does not exceed. This limits the change in wind speed. Due to the constant peripheral speed of the bobbin during the winding cycle, the change in the winding speed cannot be eliminated. This requires a very narrow gradation, so that the number of winding phases increases with a constant winding ratio in each case. By an abrupt change in the coil ratio during the coil build-up in several phases, however, the crossing angle can be kept within limits that are favorable for the coil build-up. When jumping from one ascent phase to the next, the crossing angle is increased again. This also necessarily increases the winding speed, which disadvantageously leads to a change in the thread tension. Since in the known stepped precision cross winding with a constant circumferential speed of the coil, different winding speeds cannot be avoided, a limitation of the permissible change in the winding speed is proposed to remedy the disadvantages associated therewith.

Die EP-A-0 150 771 zeigt ebenfalls ein Verfahren und eine Vorrichtung der eingangs beschriebenen Art, also das Aufspulen von Spulgut in gestufter Präzisionskreuzwicklung, wobei die Drehzahl der Spule mit einem ersten Fühler und die Drehzahl des Antriebs des Changierfadenführers mit einem zweiten Fühler erfaßt, die Drehzahlen miteinander verglichen und abhängig davon der Antrieb des Changierfadenführers geregelt wird. Es liegt die Aufgabe zugrunde, eine Spule in Präzisionskreuzwicklung mit optimalen Eigenschaften hinsichtlich des Spulenaufbaus, insbesondere der Masseverteilung des Fadens auf der Spule, und hinsichtlich des Spulenablaufs zu schaffen. Der Faden soll mit konstanter Umfangsgeschwindigkeit auf die Spule aufgewickelt werden. Das Spulverhältnis wird in vielen Stufen so geändert, daß der Kreuzungswinkel annähernd konstant bleibt.EP-A-0 150 771 also shows a method and a device of the type described at the outset, that is, the winding of winding material in a graduated precision cross winding, the speed of the bobbin being detected with a first sensor and the speed of the drive of the traversing thread guide with a second sensor , the speeds are compared with one another and the drive of the traversing thread guide is regulated as a function thereof. It is the object of the invention to create a bobbin in a precision cross winding with optimal properties with regard to the bobbin construction, in particular the mass distribution of the thread on the bobbin, and with regard to the bobbin winding. The thread should be wound onto the bobbin at a constant peripheral speed. The winding ratio is changed in many stages so that the crossing angle remains approximately constant.

Auch die EP-A- 195 325 geht beim Aufwickeln von Fäden zu Kreuzspulen von einer konstanten Spulenumfangsgeschwindigkeit aus und vermindert die Geschwindigkeit des Changierfadenführers zwischen einer fest vorgegebenen Obergrenze und einer fest vorgegebenen Untergrenze proportional zur abnehmenden Spindeldrehzahl. Bei Erreichen der Untergrenze wird die Geschwindigkeit des Changierfadenführers wieder bis in den Bereich der Obergrenze erhöht. Dadurch entsteht eine Präzisionskreuzwicklung mit in Stufen verkleinerten Spulverhältnissen. Zur Verbesserung des Spulenaufbaus wird die Ober- und die Untergrenze der Changiergeschwindigkeit im Lauf der Spulreise gleichsinnig vermindert oder vergrößert.EP-A-195 325 also assumes a constant bobbin circumferential speed when winding threads into cross-wound bobbins and reduces the speed of the traversing thread guide between a predetermined upper limit and a predetermined lower limit proportional to the decreasing spindle speed. When the lower limit is reached, the speed of the traversing thread guide is increased again up to the upper limit. This creates a precision cross winding with winding ratios reduced in steps. To improve the bobbin build-up, the upper and lower limits of the traversing speed are reduced or increased in the same direction during the winding cycle.

Auch die EP-A- 194 524 zeigt ein Verfahren zum Aufwickeln von Fäden in gestufter Präzisionskreuzwicklung. Zur Erzielung einer optimalen Fadenablage auf der Spule müssen die Spulverhältnisse nicht nur mit großer Genauigkeit vorberechnet, sondern auch genau eingehalten werden. Da die elektrische und elektronische Meß- und Regelungstechnik, die für die Messung der Drehzahlen und die Einhaltung der Proportionalität zwischen dem Spindelantrieb und dem Antrieb des Changierfadenführers begrenzt sind, wird zur Verbesserung des Wickelaufbaus die Modulation des Spulverhältnisses in jeder Aufwindephase vorgeschlagen. Die Modulationsbreite soll weniger als 0,1 % betragen.EP-A-194 524 also shows a method for winding threads in a graduated precision cross winding. In order to achieve optimal thread placement on the bobbin, the bobbin ratios not only have to be precalculated with great accuracy, but must also be adhered to exactly. Since the electrical and electronic measurement and control technology, which are limited for the measurement of the rotational speeds and compliance with the proportionality between the spindle drive and the drive of the traversing thread guide, the modulation of the winding ratio in each winding phase is proposed to improve the winding structure. The modulation width should be less than 0.1%.

In der DE-A- 26 49 780 wird eine Wickelmaschine für Textilgarne beschrieben, bei der die Spule mittels einer drehzahlgesteuerten Treibwalze an ihrem Umfang angetrieben wird und die Kehrgewindewelle, in der der Changierfadenführer bewegt wird, ebenfalls drehzahlgesteuert ist. Beide Drehzahlen werden über elektronische Steuerschaltungen und Rechner, die u. a. die mathematischen Zusammenhänge zwischen Aufwindegeschwindigkeit, Umfangsgeschwindigkeit der Spule bzw. Treibwalze und Fadenverlegegeschwindigkeit berücksichtigen, so geregelt, daß die Differenz zwischen Fadengeschwindigkeit und Aufwindegeschwindigkeit vorgegeben werden kann. Mit dieser Einrichtung ist die Herstellung von Präzisionskreuzspulen bei konstanter Zuführgeschwindigkeit und konstanter Fadenzugkraft beim Aufwinden möglich. Dabei können über den Rechner vorprogrammierte Sprünge im Spulverhältnis durchgeführt werden, um ungünstige Bereiche der Kreuzungswinkel bei voller und leerer Spule zu vermeiden. Der technische Aufwand für diese rechnergesteuerten Drehzahlen von Treibwalze und Kehrgewindewelle ist entsprechend hoch. Änderungen in der Aufwindegeschwindigkeit sind damit nicht vollständig eliminiert, weil ein kraftschlüssiger Antrieb immer Schlupf aufweist.DE-A-26 49 780 describes a winding machine for textile yarns in which the bobbin is driven on its circumference by means of a speed-controlled drive roller and the reverse thread shaft in which the traversing thread guide is moved is also speed-controlled. Both speeds are controlled by electronic control circuits and computers, which take into account, among other things, the mathematical relationships between winding speed, peripheral speed of the bobbin or drive roller and thread laying speed, so that the difference between thread speed and winding speed can be specified. With this device, the production of precision cross-wound bobbins with constant feed speed and constant thread tension during winding is possible. In this case, preprogrammed jumps in the winding ratio can be carried out on the computer in order to avoid unfavorable regions of the crossing angles when the bobbin is full and empty. The technical effort for these computer-controlled speeds of the driving roller and the reverse thread shaft is correspondingly high. Changes in the wind-up speed are not completely eliminated because a positive drive always has slippage.

Der Erfindung liegt die Aufgabe zugrunde, ausgehend von einem Verfahren und einer Spuleinrichtung der eingangs beschriebenen Art, also in gestufter Präzisionskreuzwicklung, die Nachteile zu vermeiden, die mit einer konstanten Spulenumfangsgeschwindigkeit verbunden sind.The invention is based on the object, starting from a method and a winding device of the type described above, that is to say in a stepped precision cross winding, to avoid the disadvantages which are associated with a constant coil peripheral speed.

Erfindungsgemäß wird dies dadurch erreicht, daß der Antrieb der Spule so geregelt wird, daß die Aufwindegeschwindigkeit des Spulguts auf der Spule während der gesamten Spulreise der Geschwindigkeit des kontinuierlich zugeführten Spulguts entspricht, daß der Antrieb der Spule von einem Fadenzugkraftaufnehmer, vorzugsweise Tänzer, derart geregelt wird, daß in jeder Aufwindephase mit konstantem Spulverhältnis die durch abnehmenden Kreuzungswinkel verursachte abnehmende Aufwindegeschwindigkeit durch eine kontinuierliche Erhöhung der Drehzahl der Spule ausgeglichen wird, und daß bei jedem Sprung zwischen zwei Aufwindephasen mit konstanten Spulverhältnissen die durch die Erhöhung des Kreuzungswinkels verursachte zunehmende Aufwindegeschwindigkeit durch eine Erniedrigung der Drehzahl der Spule ausgeglichen wird. Die Aufwindegeschwindigkeit bleibt damit nicht nur in den einzelnen Aufwindephasen mit jeweils konstantem Spulverhältnis gleich, sondern auch während der Sprünge zwischen den einzelnen Aufwindephasen, also in der Zeit, in der das eine Spulverhältnis verlassen und das andere Spulverhältnis angestrebt wird. Damit ist das neue Verfahren ideal geeignet zum Aufspulen von kontinuierlich mit vorzugsweise konstanter Geschwindigkeit angeliefertem Spulgut, wie es insbesondere bei Spinnfäden der Fall ist. Das Spulgut wird damit nicht negativ beeinflußt. Es verbleibt immer unter definierter Fadenspannung, so daß damit sämtliche Vorteile einer gestuften Präzisionskreuzwicklung erreicht werden. Mit der Erfindung sind auch die Verhältnisse durch die Änderung des Kreuzungswinkels angesprochen. Zusätzlich müssen natürlich auch noch die Verhältnisse berücksichtigt werden, die sich aufgrund der Zunahme des Durchmessers der Spule ergeben. Dieser Einfluß ist größer als der Einfluß über die Änderung des Kreuzungswinkels.According to the invention, this is achieved in that the drive of the bobbin is regulated in such a way that the winding speed of the winding material on the bobbin corresponds to the speed of the continuously supplied winding material during the entire winding cycle, in that the drive of the bobbin is regulated in such a way by a thread tension transducer, preferably a dancer that in each winding phase with constant winding ratio, the decreasing winding speed caused by decreasing crossing angle is compensated for by a continuous increase in the speed of the bobbin, and that with every jump between two winding phases with constant winding ratio, the increasing winding speed caused by increasing the crossing angle is caused by a decrease in the winding angle Speed of the coil is compensated. The winding speed thus remains the same not only in the individual winding phases with a constant winding ratio, but also during the jumps between the individual winding phases, that is to say in the time in which one winding ratio is left and the other winding ratio is aimed for. The new method is thus ideally suited for winding up items to be delivered continuously at a preferably constant speed, as is the case in particular with spun threads. This does not adversely affect the rinsed material. It always remains under a defined thread tension, so that all advantages of a stepped precision cross winding are achieved. With the invention, the conditions are due to the change in the crossing angle addressed. In addition, the conditions that result from the increase in the diameter of the coil must of course also be taken into account. This influence is greater than the influence of changing the crossing angle.

Jede Aufwindephase kann mit einem übereinstimmenden Anfangskreuzungswinkel beginnend und mit einem übereinstimmenden Endkreuzungswinkel endend durchgeführt werden. Dabei durchläuft der Kreuzungswinkel im Bereich jeder Aufwindephase einen festgelegten, konstant bleibenden Bereich, der für die Qualität des Spulenaufbaus und die Weiterverarbeitungseigenschaften der Spule maßgeblich ist.Each updraft phase can be started with a matching starting crossing angle and ending with a matching ending crossing angle. The crossing angle runs through a fixed, constant area in the area of each winding phase, which is decisive for the quality of the coil construction and the further processing properties of the coil.

Eine zur Durchführung des Verfahrens geeignete Spuleinrichtung ist mit einem Antrieb für die Spule und einem ersten zugeordneten Fühler, mit einem Antrieb für den Changierfadenführer und einem zweiten zugeordneten Fühler und mit einem ersten Regler zur Verarbeitung der Signale der beiden Fühler zur Regelung des Antriebs des Changierfadenführers ausgestattet. Erfindungsgemäß ist ein zweiter Regler zur Regelung des Antriebs der Spule im Sinn der Aufwindegeschwindigkeit des kontinuierlich zugeführten Spulguts ausgebildet und mit dem Antrieb der Spule verbunden. Dem zweiten Regler ist ein Fadenzugkraftaufnehmer, vorzugsweise Tänzer, vorgeschaltet, der über diesen zweiten Regler die Drehzahl des Antriebs der Spule im Sinn der Aufwindegeschwindigkeit des kontinuierlich zugeführten Spulguts anpaßt. Während des Sprungs zwischen einem Spulverhältnis zum nächsten Spulverhältnis bei der gestuften Präzisionswicklung wird der Antrieb der Spulspindel so angepaßt, daß die z. B. vom Tänzerarm gemessene Spannung des Fadens definiert bleibt.A winding device suitable for carrying out the method is equipped with a drive for the bobbin and a first assigned sensor, with a drive for the traversing thread guide and a second assigned sensor and with a first controller for processing the signals of the two sensors for regulating the drive of the traversing thread guide . According to the invention, a second controller for regulating the drive of the bobbin is designed in the sense of the winding speed of the continuously supplied winding material and connected to the drive of the bobbin. The second controller is preceded by a thread tension transducer, preferably a dancer, which adjusts the rotational speed of the drive of the bobbin in the sense of the winding speed of the continuously supplied winding material via this second controller. During the jump between a winding ratio to the next winding ratio in the stepped precision winding, the drive of the winding spindle is adjusted so that the z. B. the tension of the thread measured by the dancer arm remains defined.

Der Antrieb für die Spule kann vorzugsweise aus einem Achsantrieb bestehen. Es ist aber auch möglich, für den Antrieb der Spule eine Treibwalze vorzusehen, wie dies an sich bekannt ist.The drive for the coil can preferably consist of an axle drive. But it is also possible for Drive the coil to provide a drive roller, as is known per se.

Während im Stand der Technik die Fühler in der Regel als Tachometer ausgebildet sind, sind jetzt die Fühler als Impulsgeber ausgebildet, wobei der Rechner je einen Zähler für je einen Impulsgeber aufweist. Mit einem solchen Impulsgeber als Fühler lassen sich die Drehzahlen der Antriebe exakt erfassen, also wesentlich genauer als mit einem Tachometer.While in the prior art the sensors are usually designed as tachometers, the sensors are now designed as pulse generators, with the computer each having a counter for each pulse generator. With such a pulse generator as a sensor, the speeds of the drives can be recorded exactly, that is, much more precisely than with a tachometer.

Für den Antrieb der Spule kann ein in seiner Drehzahl regelbarer Motor vorgesehen sein, dem ein Regelgerät vorgeschaltet ist. Ebenso ist es auch möglich, für den Antrieb des Changierfadenführers einen in seiner Drehzahl regelbaren Motor vorzusehen, dem ein Regelgerät vorgeschaltet ist. Auf diese Weise ist es möglich, die Geschwindigkeit des Changierfadenführers in Abhängigkeit von der Geschwindigkeit des Antriebs der Spule entsprechend dem jeweils gewünschten Spulverhältnis, festzulegen und andererseits eine Ausregelung des Antriebs der Spule im Sinn der Aufwindegeschwindigkeit des kontiuierlich zugeführten Spulguts, auch bei sich ändernden Kreuzungswinkeln, zu erreichen.For the drive of the coil, a motor that can be regulated in terms of its speed can be provided, which is preceded by a control device. It is also possible to provide a motor which can be regulated in terms of its speed for driving the traversing thread guide and which is preceded by a control device. In this way it is possible to determine the speed of the traversing thread guide as a function of the speed of the drive of the bobbin in accordance with the desired winding ratio, and on the other hand to regulate the drive of the bobbin in the sense of the winding speed of the continuously fed winding material, even with changing crossing angles, to reach.

Die Erfindung wird anhand eines bevorzugten Ausführungsbeispiels der Spuleinrichtung weiter beschrieben und verdeutlicht. Es zeigen:

Figur 1
einen schematischen Schaltplan wesentlicher Elemente der Spuleinrichtung und
Figur 2
ein Diagramm der konstanten aufgewickelten Spulgutlänge pro Zeiteinheit bei unterschiedlichen Kreuzungswinkeln.
The invention is further described and illustrated with the aid of a preferred embodiment of the winding device. Show it:
Figure 1
a schematic circuit diagram of essential elements of the winding device and
Figure 2
a diagram of the constant coiled length per unit of time at different crossing angles.

In Figur 1 ist ein Drehstrommotor 1 verdeutlicht, über den die nur symbolhaft angedeutete Spindel 2 angetrieben wird. Es kann sich dabei um einen direkten Achsantrieb handeln oder um einen Treibwalzenantrieb. Dem Drehstrommotor 1 ist ein Impulsgeber 3 zugeordnet, mit dessen Hilfe sich die Drehzahl der Spindel 2 bzw. des Drehstrommotors 1 exakt ermitteln läßt.A three-phase motor 1 is illustrated in FIG. 1, via which the spindle 2, which is only symbolically indicated, is driven. It can be a direct axle drive or a drive roller drive. A pulse generator 3 is assigned to the three-phase motor 1, with the aid of which the speed of the spindle 2 or the three-phase motor 1 can be determined exactly.

Weiterhin ist ein Drehstrommotor 4 vorgesehen, über welchen der nur angedeutete Changierfadenführer 5 angetrieben wird. Ein zweiter Impulsgeber 6 ist dem Changierfadenführer 5 bzw. dem Drehstrommotor 4 zugeordnet, so daß sich auch dessen Geschwindigkeit bzw. Drehzahl sehr genau überwachen läßt. Elektrische Leitungen 7 und 8 führen zu einem Rechner 9, der je einen Zähler 10 und 11, einen Vergleicher 12 und einen ersten Regler 13 aufweist. Es ist ein zweiter Regler 20 vorgesehen, der als PID-Regler ausgebildet sein kann. Mit dem Zähler 11 werden die Impulse des Impulsgebers 3 gezählt. Der Zähler 10 zählt die Impulse des Impulsgebers 6. Die Anzahl der Impulse wird im Vergleicher 12 weiterverarbeitet und dem ersten Regler 13 zugeführt. Ein Tänzer 14 mit einer Rolle 15, über den der Faden des Spulguts geführt wird, ist dem zweiten Regler 20 vorgeschaltet. Eine Bewegung des Tänzers 14 führt zu einer Signaländerung, die dem zweiten Regler 20 zugeführt wird. Vom zweiten Regler 20 führt eine erste elektrische Leitung 16 über ein als Frequenzumformer ausgebildetes Regelgerät 17 zu dem Drehstrommotor 1. Der zweite Regler 20 regelt in erster Linie den Drehstrommotor 1 und damit den Antrieb der Spindel 2 im Sinn der Aufwindegeschwindigkeit des kontinuierlich mit vorzugsweise konstanter Geschwindigkeit zugeführten Spulguts. Darüberhinaus führt vom ersten Regler 13 eine elektrische Leitung 18 über ein als Frequenzumformer ausgebildetes Regelgerät 19 zu dem Drehstrommotor 4 des Antriebs des Changierfadenführers 5.Furthermore, a three-phase motor 4 is provided, via which the traversing thread guide 5, which is only indicated, is driven. A second pulse generator 6 is assigned to the traversing thread guide 5 or the three-phase motor 4, so that its speed or rotational speed can also be monitored very precisely. Electrical lines 7 and 8 lead to a computer 9, each having a counter 10 and 11, a comparator 12 and a first controller 13. A second controller 20 is provided, which can be designed as a PID controller. With the counter 11, the pulses of the pulse generator 3 are counted. The counter 10 counts the pulses from the pulse generator 6. The number of pulses is further processed in the comparator 12 and fed to the first controller 13. A dancer 14 with a roller 15, over which the thread of the ware is passed, is connected upstream of the second controller 20. A movement of the dancer 14 leads to a signal change which is fed to the second controller 20. A first electrical line 16 leads from the second regulator 20 to the three-phase motor 1 via a regulator 17 designed as a frequency converter. The second regulator 20 primarily regulates the three-phase motor 1 and thus the drive of the spindle 2 in the sense of the winding speed of the continuously at preferably constant speed supplied ware. In addition, an electrical line 18 leads from the first controller 13 via a control device 19 designed as a frequency converter to the three-phase motor 4 of the drive of the traversing thread guide 5.

Figur 2 zeigt ein Diagramm zur Verdeutlichung der während der Spulreise aufgewickelten konstanten Spulgutlänge pro Zeiteinheit (Aufwindegeschwindigkeit). Trotz unterschiedlicher Kreuzungswinkel α, wie sie notwendigerweise bei der Präzisionskreuzwicklung in jeder Stufe durchlaufen werden und sich damit ändern, ist der Betrag der Spulgutlänge pro Zeiteinheit L immer konstant. Man erkennt, wie sich in jeder Aufwindephase mit einem konstanten Spulverhältnis sowohl die Umfangsgeschwindigkeiten vU wie auch die Changiergeschwindigkeiten vC verändern und trotzdem die Spulgutlänge pro Zeiteinheit L konstant bleibt. Die Spuleinrichtung gemäß Figur 1 mit ihrem Rechner 9 und den Reglern 13, 20 wirkt auf die Antriebe der Spindel 2 einerseits und des Changierfadenführers 5 andererseits so ein, daß die zugehörigen Umfangsgeschwindigkeiten an der Spindel 2 bzw. Spule und die Changiergeschwindigkeiten am Changierfadenführer 5 in Abhängigkeit von sich änderndem Kreuzungswinkel geregelt werden.FIG. 2 shows a diagram to illustrate the constant length of winding material per unit of time (winding speed) wound up during the winding cycle. In spite of different crossing angles α, which are necessarily passed through in each step in the precision cross winding and thus change, the amount of the length of the reels per unit time L is always constant. It can be seen how the circumferential speeds v U as well as the traversing speeds v C change in each winding phase with a constant winding ratio, and yet the length of the winding material per unit time L remains constant. The winding device according to FIG. 1 with its computer 9 and the controllers 13, 20 acts on the drives of the spindle 2 on the one hand and the traversing thread guide 5 on the other hand such that the associated peripheral speeds on the spindle 2 or bobbin and the traversing speeds on the traversing thread guide 5 are dependent be regulated by changing the crossing angle.

Bezugszeichenliste:Reference symbol list:

1 =1 =
DrehstrommotorAC motor
2 =2 =
Spindelspindle
3 =3 =
ImpulsgeberImpulse generator
4 =4 =
DrehstrommotorAC motor
5 =5 =
ChangierfadenführerTraversing thread guide
6 =6 =
ImpulsgeberImpulse generator
7 =7 =
elektrische Leitungelectrical line
8 =8 =
elektrische Leitungelectrical line
9 =9 =
Rechnercomputer
10 =10 =
Zählercounter
11 =11 =
Zählercounter
12 =12 =
VergleichsgerätComparison device
13 =13 =
erster Reglerfirst regulator
14 =14 =
Tänzerdancer
15 =15 =
Rollerole
16 =16 =
elektrische Leitungelectrical line
17 =17 =
FrequenzumformerFrequency converter
18 =18 =
elektrische Leitungelectrical line
19 =19 =
FrequenzumformerFrequency converter
20 =20 =
zweiter Reglersecond controller

Claims (6)

  1. A method for winding filamentary material, continuously fed at preferably constant speed of a winding device, in a stepped precision winding, in which the rotational speed of the bobbin is recorded by means of a first sensor and the rotational speed of the drive for the traversing thread guide by means of a second sensor, the rotational speeds are compared with each other, and depending on this, the drive for the traversing thread guide is controlled, whereby the bobbin drive is controlled in such a way that the winding speed of the material to be wound on the bobbin during the entire winding operation corresponds to the speed of the material to be wound which is being fed continuously, that the bobbin drive is controlled by a thread tension sensor, preferably compensator, in such a way that in each winding phase with constant bobbin ratio, the winding speed which is slowing down due to decreasing crossing angle is compensated by a continuous increase in the rotational speed of the bobbin, and that with each jump between two wind-up phases with constant bobbin ratios, the winding speed which is becoming faster due to increasing crossing angle is compensated by a reduction in the rotational speed of the bobbin.
  2. The method of claim 1, whereby the winding phase is performed by beginning with a coincident initial crossing angle and ending with a coincident final crossing angle.
  3. A bobbin winder for executing the method of one or several of the claims 1 and 2, having a drive for the bobbin and a first allocated sensor, a drive for the traversing thread guide and a second allocated sensor, and a first regulator for processing the signals of the two sensors in order to control the drive for the traversing thread guide, whereby a second regulator (20) for regulating the bobbin drive, in the sense of the winding speed for the material to be wound which is being fed continuously, is constructed and connected to be bobbin drive, and that a thread tension sensor, preferably compensator (14), is wired upstream of the second regulator (20), whereby said compensator adjusts, via this second regulator, the r.p.m. of the bobbin drive in the sense of the winding speed for the material to be wound which is being fed continuously.
  4. The bobbin winder of claim 3, whereby the sensors are designed as pulse generators (3, 6), and that the computer (9) has a counter (11, 12) for each pulse generator.
  5. The bobbin winder of claim 3 or 4, whereby a motor, the r.p.m. of which can be regulated, is provided as the drive for the bobbin, and that a regulating device is wired upstream of said motor.
  6. The bobbin winder of one or several of the claims 3 to 5, whereby a motor, the r.p.m. of which can be regulated, is provided as the drive for the traversing thread guide (5), and that a regulating device (19) is wired upstream of said motor.
EP93102947A 1992-03-16 1993-02-25 Method for winding filamentary material, continuously fed at preferably constant speed, in a stepped precision winding and winding device for carrying out the method Expired - Lifetime EP0562296B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4208393A DE4208393A1 (en) 1992-03-16 1992-03-16 METHOD FOR REWINDING CONTINUOUSLY WITH PREFERRED, CONSTANT SPEED OF A THREADED DEVICE, THREAD-SHAPED GOODS IN STEPPED PRECISION CROSSWINDING, AND REEL DEVICE FOR IMPLEMENTING THIS
DE4208393 1992-03-16

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EP0562296B1 true EP0562296B1 (en) 1995-07-26

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DE19538480C2 (en) * 1995-10-16 2001-10-25 Sahm Georg Fa Spooling machine and method for winding a continuously running thread on a spool
EP0950627A1 (en) * 1998-04-17 1999-10-20 Schärer Schweiter Mettler AG Method and device for winding a yarn fed with constant speed onto a bobbin
DE19950285A1 (en) * 1999-10-19 2001-04-26 Rieter Ag Maschf Swinging arm traverse for winder is driven by computer controlled servomotor according to a continuously corrected movement pattern
DE10209851A1 (en) * 2002-03-06 2003-09-18 Rieter Ingolstadt Spinnerei Method and device for winding a thread on a cross winding device
DE10342266B4 (en) * 2002-09-25 2016-02-04 Saurer Germany Gmbh & Co. Kg Method for producing a cross-wound bobbin
DE10352819A1 (en) * 2003-11-12 2005-06-23 Rieter Ingolstadt Spinnereimaschinenbau Ag Cross-winding of thread on a textile machine, adjusts cross winder unit speed in proportion with delivery speed of thread supplied
DE102009011843A1 (en) * 2009-03-05 2010-09-09 Oerlikon Textile Gmbh & Co. Kg Method for winding cross-wound packages with precision winding on a double-twisting machine
CN112110258A (en) * 2020-09-19 2020-12-22 许继电源有限公司 Shore power cable drum tension control system and control method

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DE2165600A1 (en) * 1971-02-23 1972-09-14 Leesona Corp., Warwick, R.I. (V.St.A.) Process for making a package of yarn
CH603469A5 (en) * 1975-11-05 1978-08-15 Rieter Ag Maschf
DE2947261A1 (en) * 1979-11-23 1981-06-04 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Cross spool head for spooling machine - has fixed spindle driven by controllable motor and fitted with changing device
DE3049573A1 (en) * 1980-12-31 1982-07-29 Fritjof Dipl.-Ing. Dr.-Ing. 6233 Kelkheim Maag DEVICE FOR PRODUCING YARN BOBBINS
DE3401530A1 (en) * 1984-01-18 1985-07-25 Fritjof Dipl.-Ing. Dr.-Ing. 6233 Kelkheim Maag PRECISION COIL, METHOD AND DEVICE FOR PRODUCING THE SAME
CN1005029B (en) * 1985-03-05 1989-08-23 巴马格·巴默机器制造股份公司 Winding method
DE3660670D1 (en) * 1985-03-11 1988-10-13 Barmag Barmer Maschf Winding method
GB2224520B (en) * 1988-11-07 1993-06-23 Appalachian Electronic Instr High speed precision yarn winding system
DE3920374A1 (en) * 1989-06-22 1991-01-03 Schlafhorst & Co W Cross wound bobbin winding - uses yarn tension and processor to maintain constant winding within bobbin dia. steps

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EP0562296A1 (en) 1993-09-29
DE4208393A1 (en) 1993-09-23
JPH06200428A (en) 1994-07-19
DE59300392D1 (en) 1995-08-31
TW213889B (en) 1993-10-01
KR930019535A (en) 1993-10-18
ATE125515T1 (en) 1995-08-15

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