EP1707524A1 - Textile machine making cross-wound bobbins - Google Patents

Textile machine making cross-wound bobbins Download PDF

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Publication number
EP1707524A1
EP1707524A1 EP06003338A EP06003338A EP1707524A1 EP 1707524 A1 EP1707524 A1 EP 1707524A1 EP 06003338 A EP06003338 A EP 06003338A EP 06003338 A EP06003338 A EP 06003338A EP 1707524 A1 EP1707524 A1 EP 1707524A1
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EP
European Patent Office
Prior art keywords
suction
textile machine
suction nozzle
thread
wound bobbins
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
EP06003338A
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German (de)
French (fr)
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EP1707524B1 (en
Inventor
Hans-Günter Wedershoven
Herbert Wellage
Stefan Bungter
Michael Reimann
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.)
Oerlikon Textile GmbH and Co KG
Original Assignee
Saurer GmbH and Co KG
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Publication of EP1707524A1 publication Critical patent/EP1707524A1/en
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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
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/70—Other constructional features of yarn-winding machines
    • B65H54/707—Suction generating system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/08—Automatic end-finding and material-interconnecting arrangements
    • B65H67/081—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement
    • B65H67/085—Automatic end-finding and material-interconnecting arrangements acting after interruption of the winding process, e.g. yarn breakage, yarn cut or package replacement end-finding at the take-up package, e.g. by suction and reverse package rotation
    • 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 textile machine with at least one winding unit, which contains a deliverable to a take-up spool suction nozzle, which is connected to a vacuum supply device.
  • a suction nozzle of the type mentioned has the task to seek a thread end on the circumference of a bobbin and suck, while the package is rotated in the unwinding and then insert into a thread connector.
  • the maintenance device includes a suction nozzle, which can be fed to a take-up reel of the relevant winding unit in order to search for the thread end on the package and then remove it.
  • a so-called Saugluftdosiervorraum is provided which can connect the suction nozzle with a vacuum supply device via a switching valve. The Saugluftdosiervorraum opens and closes the connection between the suction nozzle and Saugluftwaits heard.
  • each spinning unit with a deliverable to a take-up spool suction nozzle.
  • the suction nozzle which is looking for a thread end and should pull off when the take-up reel is driven against the winding direction, is connected via a switchable valve to a vacuum supply device.
  • the DE 17 85 293 A describes an adjustable aperture in the main suction of the suction nozzle for the upper thread.
  • this panel can temporarily still occupy a fixed intermediate position. This intermediate position is set only when the thread end is detected and the reduced negative pressure has the opportunity to exit through a longitudinal slot located in the suction nozzle to form a chord for thread detection by separate gripping members.
  • the invention has for its object to improve the flexibility of a cheese-producing winder of the type mentioned, in particular to optimize the absorption of the so-called upper thread of the cheese.
  • the suction nozzle is associated with a device with which the suction of the suction nozzle is variable and which is adjustable by means of a controllable drive and which is adjustable depending on the wound on the package spool to a predeterminable open position.
  • the invention allows a differentiated adjustment of the effect of the negative pressure at the individual winding units with relatively simple means, without further elements of the winding unit of the cheese-producing textile machine or the cheeses need to be reset.
  • the effect of the negative pressure which is exerted by means of the suction nozzle on the spool and the thread piece to be found and deducted by her, independent of the negative pressure adjustable, which is needed in other areas, even if several or all areas to one common vacuum supply are connected. It is thus possible to optimize the negative pressure in the region of the respective suction nozzle, without influencing other areas or winding stations, in which also negative pressure from the vacuum supply is required.
  • the hand-fillable round Kopsmagazine has at their winding units to process a variety of different yarn lots, which also differ significantly in terms of sensitivity of the yarns.
  • the means for changing the suction contains an adjustable aperture. By means of such a diaphragm, the suction effect can be changed in large areas.
  • the drive contains a stepping motor, which can be controlled by means of a winding station computer.
  • the stepper motor can bring the shutter in any desired position and hold there.
  • vacuum fluctuations in the common vacuum supply can be intercepted by the fact that the diaphragm position is adapted to this changed negative pressure and then ensures a consistent matched to the type of thread negative pressure at the suction nozzle.
  • the negative pressure in the common vacuum supply is monitored and fed to the winding station computer, which then controls the adjustment of the aperture position.
  • a sensor for monitoring the detection of the thread end and forwarding of the detection signal to the winding station computer is present.
  • the winding station computer has a circuit which, after the absence of the detection signal over a predeterminable time period, drives the drive in such a way that the device increases the suction effect of the suction nozzle.
  • This ensures that a set for example due to a sensitive thread low vacuum at the nozzle orifice now and then does not require that the operator must then intervene to detect the thread end, if automatic detection at elevated negative pressure is still possible , The increase of the negative pressure can be done gradually. Under gradual is to be understood as continuously increasing or gradual.
  • the thread search can be supported by a pitching movement of the suction nozzle in a small angular range.
  • the thread search can also be interrupted by respective pivoting back of the suction nozzle to a larger pivoting, possibly to the normal position. In a renewed attempt, the suction effect is then reinforced by an altered aperture.
  • the means for varying the suction by means of the drive in predetermined time sequences between predetermined open positions is adjustable. In this way it is possible to effect a rapid rise and fall of the suction air flow, with which the suction nozzle acts on the package when seeking and removing a thread end. This makes it possible to facilitate the finding of thread ends rolled into the bobbin.
  • the frequency of the pulses causes an influence on the intensity of the action on the thread.
  • the figure shows a schematic representation of a winding unit of a cross-wound producing textile machine, in this case a winder, are reeled in the cops to cheeses and usually has a plurality of such winding units.
  • the winding units according to the invention may also be winding units, which are arranged following a spinning device.
  • a cross-wound bobbin takes the length of a plurality of bobbins 1.
  • the yarn 2 is monitored for yarn defects by passing through an optical or capacitive electronic cleaner 4.
  • the thread 2 is cut.
  • the faulty thread length is cut out, after which the resulting thread ends are reconnected. This is done, for example, by means of a splicer 5.
  • the package 3 is held in a creel 6 which is pivotable about an axis 7 such that the Bobbin 3 rests with its circumference on a winding roller 8 during the entire cycle travel, by which it is driven by friction.
  • the winding roller 8 is provided with a drive motor, not shown, which can drive both in the winding (marked with arrow) and in the unwinding.
  • the cleaner 4 cuts through the thread 2 or the thread breaks for other reasons, the end of the thread connected to the package is still wound on the package 3 and then lies somewhere on the circumference of this package 3.
  • the end connected to the bobbin 1 is held in a thread tensioner 9.
  • the two thread ends to be connected must be inserted into the thread connecting device, i. into the splicer 5.
  • a bobbin gripper 10 which is pivotable about an axis 11, delivered to the thread tensioner 9 tapered lower thread, which comes from the bobbin 1.
  • a suction nozzle 12, which is pivotable about an axis 13, the bobbin 3 is delivered.
  • the package 3 is driven by the winding roller 8 against the winding direction.
  • the suction gripper 12 pivots back after detection of the thread end with the withdrawn from the package reel, the so-called upper thread, in the position shown and places the thread in the splicer 5 a.
  • the suction nozzle 12 is a curved, tubular body which forms a flat nozzle at its free end, which corresponds approximately to the width of the package 3.
  • the suction nozzle is in the region of its axis of rotation 13 to a vacuum supply device connected.
  • the rotation axis 13 is designed, for example, as a tubular projection, which is located in extension to a machine-long vacuum supply device.
  • the tubular extension 13 which also forms the axis of rotation, associated with a diaphragm 14, with which the opening cross-section and thus the strength of Saugluftströmung and the suction of the suction nozzle 12 can be adjusted.
  • the diaphragm 14 is pivotable by means of a drive 15, which has a stepper motor.
  • the aperture 14 is adjustable by means of the drive in any desired position.
  • the stepper motor is controlled by means of a winding station computer 16, which also controls the other elements of the winding unit, ie the cleaner 4, the splicer 5, the drive of the winding roller 8, the thread tensioner 9 and the drives, the pivoting movement of the thread gripper 10 and the suction nozzle 12th cause.
  • the winding station computer 16 is associated with an input unit 17, with which the operating conditions can be entered, and in particular also the desired opening position of the aperture 14, which is set by the motor drive. This can also be done from a central point of the winder. For this purpose, the Spulstellenrechner, as indicated in the drawing, connected to a data bus of the machine.
  • the motor drive can provide that the aperture 14 is opened and closed at certain times, and that the aperture 14 assumes a specific position in the open position and thus releases a predeterminable cross section.
  • the aperture 14 is set to an opening cross-section, when the suction nozzle 12 of the package 3 is delivered, which differs from the opening cross-section to which the aperture is set, while the suction nozzle 12 with the found thread from the package 3 again moved to insert the upper thread in the thread connector (splicer).
  • the switching between the opening cross sections is controlled by a sensor 18 which is disposed within the suction nozzle 12 and detects whether the suction nozzle has found the thread end of the package 3 and recorded.
  • the aperture 14 for the more intensive thread search can be opened further.
  • the further opening of the aperture 14 can be gradual or continuous.
  • the aperture 14, when the suction gripper 12 of the package 3 is delivered, is reciprocated in rapid alternation between an open or closed or between a more open and less open position, so that an ab- and swelling Saugluftströmung is obtained, which acts on the circumference of the package 3.
  • This movement of the diaphragm 14 is effected by appropriate control of the preferably designed as a stepping motor then reversing drive 15.
  • the rise and fall of the suction air flow is expediently made only as long as the suction gripper of the package 3 is delivered. If it has been detected by the sensor 18 that a yarn end has been found and recorded, then the shutter 14 is stopped in a predetermined position, which is associated with a predetermined suction.
  • a vacuum monitoring not shown in the common vacuum supply is coupled to the winding station computer and transmits the print data. In this way, the aperture can also be adjusted depending on the negative pressure in the vacuum supply.
  • the respectively to be released from the diaphragm cross-section which is required individually is to be determined depending on the negative pressure in the vacuum supply and the vacuum required at the suction nozzle mouth empirically or to optimize.
  • the diaphragm positions close to the closed position are to be determined particularly precisely, since in the region of the open position, no significant changes in vacuum in the region of the suction nozzle orifice occur. This results primarily from the fact that only with increasing undershooting of the cross section of the suction nozzle opening a significant pressure reduction occurs.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)

Abstract

The machine has a suction nozzle (12) that for serving a running bobbin (3), where the nozzle is connected to a common negative pressure supplying device. An orifice is attached to the nozzle, with which a suction effect of the nozzle is varied. The nozzle is adjustable by a controllable drive (15), and is adjustable onto a preset opening position depending on the thread type that is wound on the running bobbin.

Description

Die Erfindung betrifft eine Kreuzspulen herstellende Textilmaschine mit wenigstens einer Spulstelle, die eine einer Auflaufspule zustellbare Saugdüse enthält, die an eine Unterdruckversorgungseinrichtung angeschlossen ist.The invention relates to a cross-wound textile machine with at least one winding unit, which contains a deliverable to a take-up spool suction nozzle, which is connected to a vacuum supply device.

Eine Saugdüse der eingangs genannten Art hat die Aufgabe, ein Fadenende auf dem Umfang einer Auflaufspule zu suchen und anzusaugen, während die Auflaufspule in Abwickelrichtung gedreht wird und dann in einen Fadenverbinder einzulegen.A suction nozzle of the type mentioned has the task to seek a thread end on the circumference of a bobbin and suck, while the package is rotated in the unwinding and then insert into a thread connector.

Es ist im Zusammenhang mit Spulmaschinen bekannt DE 32 25 379 A1 ), für mehrere Spulstellen ein verfahrbares Wartungsgerät vorzusehen, das Fadenverbindungen herstellt, nachdem ein Reinigungsschnitt bei einem Umspulvorgang ausgeführt worden ist. Das Wartungsgerät enthält eine Saugdüse, die einer Auflaufspule der betreffenden Spulstelle zustellbar ist, um das Fadenende auf der Auflaufspule zu suchen und dann abzuziehen. Um die Saugdüse mit Saugluft zu beaufschlagen, ist eine so bezeichnete Saugluftdosiervorrichtung vorgesehen, die über ein Schaltventil die Saugdüse mit einer Unterdruckversorgungseinrichtung verbinden kann. Die Saugluftdosiervorrichtung öffnet und schließt die Verbindung zwischen Saugdüse und Saugluftversorgungseinrichtung.It is known in connection with winding machines DE 32 25 379 A1 ) to provide for several winding units a movable maintenance device that produces thread connections after a cleaning cut has been carried out in a rewinding. The maintenance device includes a suction nozzle, which can be fed to a take-up reel of the relevant winding unit in order to search for the thread end on the package and then remove it. In order to apply suction to the suction nozzle, a so-called Saugluftdosiervorrichtung is provided which can connect the suction nozzle with a vacuum supply device via a switching valve. The Saugluftdosiervorrichtung opens and closes the connection between the suction nozzle and Saugluftversorgungseinrichtung.

Bei einer OE-Rotorspinnmaschine ist es bekannt ( DE 101 39 074 A1 ), jedes Spinnaggregat mit einer einer Auflaufspule zustellbaren Saugdüse zu versehen. Die Saugdüse, die ein Fadenende suchen und bei entgegen der Aufwickelrichtung angetriebener Auflaufspule abziehen soll, ist über ein schaltbares Ventil mit einer Unterdruckversorgungseinrichtung verbunden.In an OE rotor spinning machine, it is known ( DE 101 39 074 A1 ) to provide each spinning unit with a deliverable to a take-up spool suction nozzle. The suction nozzle, which is looking for a thread end and should pull off when the take-up reel is driven against the winding direction, is connected via a switchable valve to a vacuum supply device.

Auch die DE 102 57 804 A1 , 102 01 533 A1 und 101 39 074 A1 beschreiben Saugluftversorgungen für Saugdüsen zur Oberfadenerfassung. Allen ist jedoch gemeinsam, dass der Saugluftanschluss schaltbar ist, das heißt, an- und abgeschaltet werden kann.Also the DE 102 57 804 A1 . 102 01 533 A1 and 101 39 074 A1 describe suction air supplies for suction nozzles for upper thread detection. However, all have in common that the Saugluftanschluss is switchable, that is, can be switched on and off.

Die DE 17 85 293 A beschreibt eine verstellbare Blende im Hauptsaugkanal der Saugdüse für den Oberfaden. Diese Blende kann neben der vollständigen Offenstellung und der vollständigen Geschlossenstellung vorübergehend noch eine feste Zwischenstellung einnehmen. Diese Zwischenstellung wird erst dann eingestellt, wenn das Fadenende erfasst ist und durch den reduzierten Unterdruck die Möglichkeit hat, durch einen in der Saugdüse befindlichen Längsschlitz auszutreten, um eine Sehne zur Fadenerfassung durch separate Greiforgane zu bilden.The DE 17 85 293 A describes an adjustable aperture in the main suction of the suction nozzle for the upper thread. In addition to the full open position and the full closed position, this panel can temporarily still occupy a fixed intermediate position. This intermediate position is set only when the thread end is detected and the reduced negative pressure has the opportunity to exit through a longitudinal slot located in the suction nozzle to form a chord for thread detection by separate gripping members.

Es ist weiter bekannt ( DE 196 50 934 A1 ), eine Kopsvorbereitungseinrichtung, die eine Vielzahl von Spulstellen einer Spulmaschine mit vorbereiteten Kopsen versorgt, mittels einer Absperreinrichtung an eine Saugluftversorgungseinrichtung anzuschließen. Die Kopsvorbereitungseinrichtung besteht aus einem stationären, mit einem Längsschlitz versehenen Rohr, dem ein Kops zustellbar ist. Die zwischen dem Rohr und einer zentralen Saugluftversorgungseinrichtung angeordnete Absperreinrichtung enthält eine motorisch angetriebene Blende, mit der die Saugluft nicht nur zu- und abgeschaltet werden kann, sondern auch bezüglich der Stärke ihrer Wirkung eingestellt werden kann.It is further known ( DE 196 50 934 A1 ), a Kopsvorbereitungseinrichtung that supplies a plurality of winding units of a winder with prepared cops to connect by means of a shut-off device to a Saugluftversorgungseinrichtung. The Kopsvorbereitungseinrichtung consists of a stationary, provided with a longitudinal slot tube, which is a Kops deliverable. The between the pipe and a central Saugluftversorgungseinrichtung arranged shut-off device includes a motor-driven aperture, with which the suction air can not only be switched on and off, but also with respect to the strength of their effect can be adjusted.

Der Erfindung liegt die Aufgabe zugrunde, die Flexibilität einer Kreuzspulen herstellenden Spulmaschine der eingangs genannten Art zu verbessern, insbesondere die Aufnahme des so genannten Oberfadens von der Kreuzspule zu optimieren.The invention has for its object to improve the flexibility of a cheese-producing winder of the type mentioned, in particular to optimize the absorption of the so-called upper thread of the cheese.

Diese Aufgabe wird dadurch gelöst, dass der Saugdüse eine Einrichtung zugeordnet ist, mit der die Saugwirkung der Saugdüse veränderbar ist und die mittels eines steuerbaren Antriebes verstellbar ist und die in Abhängigkeit von der auf die Auflaufspule aufgewundenen Fadenart auf eine vorbestimmbare Öffnungsstellung einstellbar ist.This object is achieved in that the suction nozzle is associated with a device with which the suction of the suction nozzle is variable and which is adjustable by means of a controllable drive and which is adjustable depending on the wound on the package spool to a predeterminable open position.

Unterschiedliche Garne reagieren unterschiedlich empfindlich auf einen Unterdruck, der von der Saugdüse auf die Garne und auf die Auflaufspule ausgeübt wird. Wenn unterschiedliche Garne oder Fäden mit unterschiedlicher Empfindlichkeit für Unterdruck auf einer Maschine verarbeitet werden sollen, so erlaubt die Erfindung eine differenzierte Anpassung der Wirkung des Unterdrucks an den einzelnen Spulstellen mit relativ einfachen Mitteln, ohne dass weitere Elemente der Spulstelle der Kreuzspulen herstellenden Textilmaschine oder der Kreuzspulen herstellenden Textilmaschine neu eingestellt werden müssen. Dabei ist die Wirkung des Unterdruckes, der mittels der Saugdüse auf die Spule und das von ihr aufzufindende und abzuziehende Fadenstück ausgeübt wird, unabhängig von dem Unterdruck einstellbar, der in anderen Bereichen benötigt wird, auch wenn mehrere oder alle Bereiche an eine gemeinsame Unterdruckversorgung angeschlossen sind. Es ist also möglich, den Unterdruck im Bereich der jeweiligen Saugdüse zu optimieren, ohne andere Bereiche oder Spulstellen zu beeinflussen, in denen ebenfalls Unterdruck aus der Unterdruckversorgung benötigt wird.Different yarns react differently to a negative pressure exerted by the suction nozzle on the yarns and on the package. If different yarns or threads are to be processed with different sensitivity for negative pressure on a machine, so the invention allows a differentiated adjustment of the effect of the negative pressure at the individual winding units with relatively simple means, without further elements of the winding unit of the cheese-producing textile machine or the cheeses need to be reset. In this case, the effect of the negative pressure, which is exerted by means of the suction nozzle on the spool and the thread piece to be found and deducted by her, independent of the negative pressure adjustable, which is needed in other areas, even if several or all areas to one common vacuum supply are connected. It is thus possible to optimize the negative pressure in the region of the respective suction nozzle, without influencing other areas or winding stations, in which also negative pressure from the vacuum supply is required.

Dabei wird es erst durch die Erfindung möglich, beispielsweise an einer Spulmaschine zum Umspulen von Kopsen, die von Hand befüllbare runde Kopsmagazine an ihren Spulstellen aufweist, eine Vielzahl unterschiedlicher Garnpartien zu verarbeiten, die sich auch hinsichtlich der Empfindlichkeit der Garne deutlich voneinander unterscheiden.It is only possible by the invention, for example, on a winding machine for rewinding cops, the hand-fillable round Kopsmagazine has at their winding units to process a variety of different yarn lots, which also differ significantly in terms of sensitivity of the yarns.

In Ausgestaltung der Erfindung wird vorgesehen, dass die Einrichtung zum Verändern der Saugwirkung eine verstellbare Blende enthält. Mittels einer derartigen Blende lässt sich die Saugwirkung in großen Bereichen verändern.In an embodiment of the invention it is provided that the means for changing the suction contains an adjustable aperture. By means of such a diaphragm, the suction effect can be changed in large areas.

In weiterer Ausgestaltung der Erfindung wird vorgesehen, dass der Antrieb einen Schrittmotor enthält, der mittels eines Spulstellenrechners ansteuerbar ist. Der Schrittmotor kann die Blende in jede gewünschte Stellung bringen und dort halten.In a further embodiment of the invention, it is provided that the drive contains a stepping motor, which can be controlled by means of a winding station computer. The stepper motor can bring the shutter in any desired position and hold there.

Außerdem können Unterdruckschwankungen in der gemeinsamen Unterdruckversorgung dadurch abgefangen werden, dass die Blendenstellung an diesen veränderten Unterdruck angepasst wird und auch dann einen gleich bleibenden auf die Fadenart abgestimmten Unterdruck an der Saugdüse gewährleistet. Dazu wird der Unterdruck in der gemeinsamen Unterdruckversorgung überwacht und dem Spulstellenrechner zugeleitet, der dann die Anpassung der Blendenstellung ansteuert.In addition, vacuum fluctuations in the common vacuum supply can be intercepted by the fact that the diaphragm position is adapted to this changed negative pressure and then ensures a consistent matched to the type of thread negative pressure at the suction nozzle. For this purpose, the negative pressure in the common vacuum supply is monitored and fed to the winding station computer, which then controls the adjustment of the aperture position.

Gemäß einer Weiterbildung der Erfindung ist ein Sensor zur Überwachung der Erfassung des Fadenendes und Weiterleitung des Erfassungssignales an den Spulstellenrechner vorhanden. Der Spulstellenrechner besitzt eine Schaltung, die nach Ausbleiben des Erfassungssignales über einen vorgebbaren Zeitraum den Antrieb so ansteuert, dass die Einrichtung die Saugwirkung der Saugdüse erhöht. Dadurch ist gewährleistet, dass ein zum Beispiel auf Grund eines empfindlichen Fadens eingestellter niedriger Unterdruck an der Düsenmündung nicht hin und wieder dazu führt, dass die Bedienperson auch dann eingreifen muss, um das Fadenende zu erfassen, wenn eine automatische Erfassung bei erhöhtem Unterdruck noch möglich ist. Die Erhöhung des Unterdruckes kann allmählich erfolgen. Unter allmählich ist dabei kontinuierlich ansteigend oder stufenweise zu verstehen.
Die Fadensuche kann durch eine Nickbewegung der Saugdüse in einem geringen Winkelbereich unterstützt werden. Die Fadensuche kann auch durch jeweiliges Zurückschwenken der Saugdüse um einen größeren Schwenkweg, gegebenenfalls bis in die Grundstellung, unterbrochen werden. Bei einem erneuten Versuch ist dann die Saugwirkung durch eine veränderte Blendenstellung jeweils verstärkt.According to one embodiment of the invention, a sensor for monitoring the detection of the thread end and forwarding of the detection signal to the winding station computer is present. The winding station computer has a circuit which, after the absence of the detection signal over a predeterminable time period, drives the drive in such a way that the device increases the suction effect of the suction nozzle. This ensures that a set for example due to a sensitive thread low vacuum at the nozzle orifice now and then does not require that the operator must then intervene to detect the thread end, if automatic detection at elevated negative pressure is still possible , The increase of the negative pressure can be done gradually. Under gradual is to be understood as continuously increasing or gradual.
The thread search can be supported by a pitching movement of the suction nozzle in a small angular range. The thread search can also be interrupted by respective pivoting back of the suction nozzle to a larger pivoting, possibly to the normal position. In a renewed attempt, the suction effect is then reinforced by an altered aperture.

In weiterer Ausgestaltung der Erfindung wird vorgesehen, dass die Einrichtung zum Verändern der Saugwirkung mittels des Antriebes in vorbestimmten Zeitfolgen zwischen vorbestimmten Öffnungsstellungen verstellbar ist. Auf diese Weise ist es möglich, ein schnelles An- und Abschwellen der Saugluftströmung zu bewirken, mit welchem die Saugdüse auf die Auflaufspule beim Aufsuchen und Abziehen eines Fadenendes einwirkt. Dadurch ist es möglich, das Auffinden von in die Spule eingewalzten Fadenenden zu erleichtern. Außerdem kann über die Öffnungsstellung der Blende hinaus durch die Frequenz der Impulse eine Beeinflussung der Intensität der Einwirkung auf den Faden bewirkt werden.In a further embodiment of the invention it is provided that the means for varying the suction by means of the drive in predetermined time sequences between predetermined open positions is adjustable. In this way it is possible to effect a rapid rise and fall of the suction air flow, with which the suction nozzle acts on the package when seeking and removing a thread end. This makes it possible to facilitate the finding of thread ends rolled into the bobbin. In addition, beyond the open position of the aperture the frequency of the pulses causes an influence on the intensity of the action on the thread.

Die Erfindung wird nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert.The invention will be explained in more detail with reference to an embodiment shown in the drawing.

Die Figur zeigt in schematischer Darstellung eine Spulstelle einer Kreuzspulen herstellenden Textilmaschine, im vorliegenden Fall einer Spulmaschine, bei der Kopse zu Kreuzspulen umgespult werden und die üblicherweise eine Vielzahl derartiger Spulstellen besitzt. Alternativ kann es sich bei den erfindungsgemäßen Spulstellen auch um Spulstellen handeln, die im Anschluss an eine Spinneinrichtung angeordnet sind.The figure shows a schematic representation of a winding unit of a cross-wound producing textile machine, in this case a winder, are reeled in the cops to cheeses and usually has a plurality of such winding units. Alternatively, the winding units according to the invention may also be winding units, which are arranged following a spinning device.

An jeder Spulstelle wird von einer Spinnspule 1, einem so genannten Kops, ein Faden 2 abgezogen und als eine Kreuzspule aufgewickelt, der so genannten Auflaufspule 3. Eine Kreuzspule nimmt die Länge einer Vielzahl von Spinnspulen 1 auf.At each winding station of a bobbin 1, a so-called cop, a thread 2 withdrawn and wound up as a cross-wound bobbin, the so-called package 3. A cross-wound bobbin takes the length of a plurality of bobbins 1.

Während des Umspulens wird der Faden 2 auf Garnfehler überwacht, indem er durch einen optischen oder kapazitiven elektronischen Reiniger 4 läuft.During rewinding, the yarn 2 is monitored for yarn defects by passing through an optical or capacitive electronic cleaner 4.

Stellt der Reiniger 4 einen Fehler fest, so wird der Faden 2 geschnitten. Die fehlerhafte Fadenlänge wird herausgetrennt, wonach die entstandenen Fadenenden wieder miteinander verbunden werden. Dies erfolgt beispielsweise mittels eines Spleißers 5.If the cleaner 4 detects an error, the thread 2 is cut. The faulty thread length is cut out, after which the resulting thread ends are reconnected. This is done, for example, by means of a splicer 5.

Die Auflaufspule 3 ist in einem Spulenrahmen 6 gehalten, der um eine Achse 7 derart verschwenkbar ist, dass die Auflaufspule 3 während der gesamten Spulenreise mit ihrem Umfang auf einer Wickelwalze 8 aufliegt, von der sie mittels Friktion angetrieben wird. Die Wickelwalze 8 ist mit einem nicht dargestellten Antriebsmotor versehen, der sie sowohl in Aufwickelrichtung (mit Pfeil gekennzeichnet) als auch in Abwickelrichtung antreiben kann.The package 3 is held in a creel 6 which is pivotable about an axis 7 such that the Bobbin 3 rests with its circumference on a winding roller 8 during the entire cycle travel, by which it is driven by friction. The winding roller 8 is provided with a drive motor, not shown, which can drive both in the winding (marked with arrow) and in the unwinding.

Wenn der Reiniger 4 den Faden 2 durchtrennt oder der Faden aus anderen Gründen bricht, so wird das mit der Auflaufspule verbundene Ende des Fadens noch auf die Auflaufspule 3 aufgewickelt und liegt dann irgendwo auf dem Umfang dieser Auflaufspule 3. Das mit der Spinnspule 1 verbundene Ende wird in einem Fadenspanner 9 gehalten. Um die Fadenverbindung wieder herzustellen, müssen die beiden zu verbindenden Fadenenden in die Fadenverbindungseinrichtung eingelegt werden, d.h. in den Spleißer 5.If the cleaner 4 cuts through the thread 2 or the thread breaks for other reasons, the end of the thread connected to the package is still wound on the package 3 and then lies somewhere on the circumference of this package 3. The end connected to the bobbin 1 is held in a thread tensioner 9. In order to restore the thread connection, the two thread ends to be connected must be inserted into the thread connecting device, i. into the splicer 5.

Hierzu wird ein Unterfadengreifer 10, der um eine Achse 11 verschwenkbar ist, dem zu dem Fadenspanner 9 zulaufenden Unterfaden zugestellt, der von der Spinnspule 1 kommt. Eine Saugdüse 12, die um eine Achse 13 schwenkbar ist, wird der Auflaufspule 3 zugestellt. Um das Fadenende an dem Umfang der Auflaufspule 3 zu finden, aufzunehmen und abzuziehen, wird die Auflaufspule 3 von der Wickelwalze 8 entgegen der Aufwickelrichtung angetrieben. Der Sauggreifer 12 schwenkt nach Erfassung des Fadenendes mit dem von der Auflaufspule abgezogenen Faden, dem so genannten Oberfaden, in die dargestellte Stellung zurück und legt den Faden in den Spleißer 5 ein.For this purpose, a bobbin gripper 10, which is pivotable about an axis 11, delivered to the thread tensioner 9 tapered lower thread, which comes from the bobbin 1. A suction nozzle 12, which is pivotable about an axis 13, the bobbin 3 is delivered. To find the thread end at the circumference of the package 3, record and subtract, the package 3 is driven by the winding roller 8 against the winding direction. The suction gripper 12 pivots back after detection of the thread end with the withdrawn from the package reel, the so-called upper thread, in the position shown and places the thread in the splicer 5 a.

Die Saugdüse 12 ist ein gebogener, rohrförmiger Körper, der an seinem freien Ende eine Flachdüse bildet, die etwa der Breite der Auflaufspule 3 entspricht. Die Saugdüse ist im Bereich ihrer Drehachse 13 an eine Unterdruckversorgungseinrichtung angeschlossen. Hierzu ist die Drehachse 13 beispielsweise als ein rohrförmiger Ansatz gestaltet, der sich in Verlängerung an einer maschinenlangen Unterdruckversorgungseinrichtung befindet.The suction nozzle 12 is a curved, tubular body which forms a flat nozzle at its free end, which corresponds approximately to the width of the package 3. The suction nozzle is in the region of its axis of rotation 13 to a vacuum supply device connected. For this purpose, the rotation axis 13 is designed, for example, as a tubular projection, which is located in extension to a machine-long vacuum supply device.

Um die Saugwirkung der Saugdüse erfindungsgemäß einstellen zu können, ist dem rohrförmigen Ansatz 13, der auch die Drehachse bildet, eine Blende 14 zugeordnet, mit welcher der Öffnungsquerschnitt und damit die Stärke der Saugluftströmung und die Saugwirkung der Saugdüse 12 eingestellt werden kann.In order to adjust the suction of the suction nozzle according to the invention, the tubular extension 13, which also forms the axis of rotation, associated with a diaphragm 14, with which the opening cross-section and thus the strength of Saugluftströmung and the suction of the suction nozzle 12 can be adjusted.

Die Blende 14 ist mittels eines Antriebs 15 verschwenkbar, der einen Schrittmotor besitzt. Die Blende 14 ist mittels des Antriebs in jeder gewünschten Stellung einstellbar.The diaphragm 14 is pivotable by means of a drive 15, which has a stepper motor. The aperture 14 is adjustable by means of the drive in any desired position.

Der Schrittmotor wird mittels eines Spulstellenrechners 16 angesteuert, der auch die übrigen Elemente der Spulstelle steuert, d.h. den Reiniger 4, den Spleißer 5, den Antrieb der Wickelwalze 8, den Fadenspanner 9 sowie die Antriebe, die die Verschwenkbewegung des Fadengreifers 10 und der Saugdüse 12 bewirken. Dem Spulstellenrechner 16 ist eine Eingabeeinheit 17 zugeordnet, mit der die Betriebsbedingungen eingegeben werden können, und insbesondere auch die gewünschte Öffnungsstellung der Blende 14, die von dem motorischen Antrieb eingestellt wird. Dies kann auch von zentraler Stelle der Spulmaschine geschehen. Dazu ist der Spulstellenrechner, wie zeichnerisch angedeutet, an einen Datenbus der Maschine angeschlossen.
Der motorische Antrieb kann vorsehen, dass die Blende 14 zu bestimmten Zeitpunkten geöffnet und geschlossen wird, und dass die Blende 14 in der Öffnungsstellung eine bestimmte Position einnimmt und damit einen vorbestimmbaren Querschnitt freigibt. Bei einer Ausführungsform der Erfindung wird vorgesehen, dass die Blende 14 auf einen Öffnungsquerschnitt eingestellt wird, wenn die Saugdüse 12 der Auflaufspule 3 zugestellt ist, der sich von dem Öffnungsquerschnitt unterscheidet, auf den die Blende eingestellt ist, während sich die Saugdüse 12 mit dem aufgefundenen Faden von der Auflaufspule 3 wieder hinweg bewegt, um den Oberfaden in den Fadenverbinder (Spleißer) einzulegen. Das Umschalten zwischen den Öffnungsquerschnitten wird dabei von einem Sensor 18 gesteuert, der innerhalb der Saugdüse 12 angeordnet ist und der erkennt, ob die Saugdüse das Fadenende der Auflaufspule 3 gefunden und aufgenommen hat. So wird nach erkannter Erfassung des Fadenendes mittels der Blendenstellung der Unterdruck zurückgenommen, da der für die Fadensuche benötigte höhere Unterdruck nicht mehr anliegen muss.The stepper motor is controlled by means of a winding station computer 16, which also controls the other elements of the winding unit, ie the cleaner 4, the splicer 5, the drive of the winding roller 8, the thread tensioner 9 and the drives, the pivoting movement of the thread gripper 10 and the suction nozzle 12th cause. The winding station computer 16 is associated with an input unit 17, with which the operating conditions can be entered, and in particular also the desired opening position of the aperture 14, which is set by the motor drive. This can also be done from a central point of the winder. For this purpose, the Spulstellenrechner, as indicated in the drawing, connected to a data bus of the machine.
The motor drive can provide that the aperture 14 is opened and closed at certain times, and that the aperture 14 assumes a specific position in the open position and thus releases a predeterminable cross section. In one embodiment of the Invention is provided that the aperture 14 is set to an opening cross-section, when the suction nozzle 12 of the package 3 is delivered, which differs from the opening cross-section to which the aperture is set, while the suction nozzle 12 with the found thread from the package 3 again moved to insert the upper thread in the thread connector (splicer). The switching between the opening cross sections is controlled by a sensor 18 which is disposed within the suction nozzle 12 and detects whether the suction nozzle has found the thread end of the package 3 and recorded. Thus, after detecting the detection of the thread end by means of the diaphragm position, the negative pressure is withdrawn, since the required for the thread search higher negative pressure does not have to be present.

Des weiteren kann, wenn der Sensor 18 über einen vorgebbaren Zeitraum die Fadenerfassung nicht an den Spulstellenrechner 16 meldet, die Blende 14 für die intensivere Fadensuche weiter geöffnet werden. Alternativ kann die weitere Öffnung der Blende 14 stufenweise oder kontinuierlich geschehen.Furthermore, if the sensor 18 does not report the thread detection to the winding station computer 16 over a predefinable period of time, the aperture 14 for the more intensive thread search can be opened further. Alternatively, the further opening of the aperture 14 can be gradual or continuous.

Bei einer anderen Ausführungsform wird vorgesehen, dass die Blende 14, wenn der Sauggreifer 12 der Auflaufspule 3 zugestellt ist, in schnellem Wechsel zwischen einer geöffneten oder geschlossenen oder zwischen einer weiter geöffneten und weniger geöffneten Position hin- und herbewegt wird, so dass eine ab- und anschwellende Saugluftströmung erhalten wird, die auf den Umfang der Auflaufspule 3 wirkt. Diese Bewegung der Blende 14 wird durch entsprechende Ansteuerung des vorzugsweise als Schrittmotor ausgebildete dann reversierenden Antriebs 15 bewirkt. Das An- und Abschwellen der Saugluftströmung wird zweckmäßigerweise nur so lange vorgenommen, wie der Sauggreifer der Auflaufspule 3 zugestellt ist. Wenn vom Sensor 18 erkannt worden ist, dass ein Fadenende gefunden und aufgenommen worden ist, so wird dann die Blende 14 in einer vorbestimmten Stellung, der eine vorbestimmte Saugwirkung zugeordnet ist, angehalten.In another embodiment, it is provided that the aperture 14, when the suction gripper 12 of the package 3 is delivered, is reciprocated in rapid alternation between an open or closed or between a more open and less open position, so that an ab- and swelling Saugluftströmung is obtained, which acts on the circumference of the package 3. This movement of the diaphragm 14 is effected by appropriate control of the preferably designed as a stepping motor then reversing drive 15. The rise and fall of the suction air flow is expediently made only as long as the suction gripper of the package 3 is delivered. If it has been detected by the sensor 18 that a yarn end has been found and recorded, then the shutter 14 is stopped in a predetermined position, which is associated with a predetermined suction.

Eine nicht dargestellte Unterdrucküberwachung in der gemeinsamen Unterdruckversorgung ist mit dem Spulstellenrechner gekoppelt und übermittelt die Druckdaten. Auf diese Weise kann die Blendenstellung auch abhängig vom Unterdruck in der Unterdruckversorgung angepasst werden.A vacuum monitoring, not shown in the common vacuum supply is coupled to the winding station computer and transmits the print data. In this way, the aperture can also be adjusted depending on the negative pressure in the vacuum supply.

Der jeweils von der Blende freizugebende Querschnitt, der individuell benötigt wird, ist in Abhängigkeit vom Unterdruck in der Unterdruckversorgung und dem an der Saugdüsenmündung benötigten Unterdruck empirisch zu ermitteln beziehungsweise zu optimieren. Dabei sind die Blendenstellungen nahe der Geschlossenstellung besonders genau zu ermitteln, da im Bereich der Offenstellung sich noch keine signifikanten Unterdruckänderungen im Bereich der Saugdüsenmündung ergeben. Dies resultiert vor allem daraus, dass erst bei zunehmender Unterschreitung des Querschnittes der Saugdüsenmündung eine deutliche Druckreduzierung eintritt.The respectively to be released from the diaphragm cross-section, which is required individually is to be determined depending on the negative pressure in the vacuum supply and the vacuum required at the suction nozzle mouth empirically or to optimize. In this case, the diaphragm positions close to the closed position are to be determined particularly precisely, since in the region of the open position, no significant changes in vacuum in the region of the suction nozzle orifice occur. This results primarily from the fact that only with increasing undershooting of the cross section of the suction nozzle opening a significant pressure reduction occurs.

Claims (8)

Kreuzspulen herstellende Textilmaschine mit nebeneinander angeordneten Spulstellen, die jeweils eine einer Auflaufspule zustellbare Saugdüse enthalten, die an eine gemeinsame Unterdruckversorgungseinrichtung angeschlossen sind,
dadurch gekennzeichnet,
dass der Saugdüse (12) eine Einrichtung (14) zugeordnet ist, mit der die Saugwirkung der Saugdüse (12) veränderbar ist und die mittels eines steuerbaren Antriebs (15) verstellbar ist und die in Abhängigkeit von der auf die Auflaufspule aufgewundenen Fadenart auf eine vorbestimmbare Öffnungsstellung einstellbar ist.Textile machine producing cross-wound bobbins with winding units arranged next to one another, each of which contains a suction nozzle which can be delivered to a take-up bobbin and which are connected to a common vacuum supply device,
characterized,
in that the suction nozzle (12) is assigned a device (14) with which the suction effect of the suction nozzle (12) can be changed and which is adjustable by means of a controllable drive (15) and which can be predefined depending on the type of thread wound on the package Opening position is adjustable. Kreuzspulen herstellende Textilmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Einrichtung zum Verändern der Saugwirkung eine verstellbare Blende (14) enthält.Textile machine producing cross-wound bobbins according to claim 1, characterized in that the means for changing the suction comprises an adjustable aperture (14). Kreuzspulen herstellende Textilmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Antrieb (15) einen Schrittmotor enthält, der mittels eines Spulstellenrechners (16) ansteuerbar ist.Textile machine producing cross-wound bobbins according to claim 1 or 2, characterized in that the drive (15) contains a stepping motor which can be activated by means of a winding station computer (16). Kreuzspulen herstellende Textilmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Öffnungsstellung in Abhängigkeit vom momentanen Unterdruck in der Unterdruckversorgungseinrichtung einstellbar ist.Textile machine producing cross-wound bobbins according to claim 1, characterized in that the open position can be set as a function of the momentary negative pressure in the vacuum supply device. Kreuzspulen herstellende Textilmaschine nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass ein Sensor (18) zur Überwachung der Erfassung des Fadenendes und Weiterleitung des Erfassungssignales an den Spulstellenrechner (16) vorhanden ist und dass der Spulstellenrechner eine Schaltung besitzt, die nach Ausbleiben des Erfassungssignales über einen vorgebbaren Zeitraum den Antrieb (15) so ansteuert, dass die Einrichtung (14) die Saugwirkung der Saugdüse (12) erhöht.Textile machine producing cross-wound bobbins according to one of claims 1 to 4, characterized in that a sensor (18) for monitoring the detection of the thread end and forwarding of the detection signal to the winding station computer (16) is present and that the winding station computer has a circuit which after failure of the Detection signal over a predetermined period of the drive (15) controls so that the means (14) increases the suction of the suction nozzle (12). Kreuzspulen herstellende Textilmaschine nach Anspruch 5, dadurch gekennzeichnet, dass die Schaltung so eingerichtet ist, dass sie die Saugwirkung der Saugdüse allmählich erhöht.A cheese-making textile machine according to claim 5, characterized in that the circuit is adapted to gradually increase the suction of the suction nozzle. Kreuzspulen herstellende Textilmaschine nach Anspruch 6, dadurch gekennzeichnet, dass die Schaltung so eingerichtet ist, dass sie die Saugwirkung der Saugdüse stufenweise erhöht.Textile machine producing cross-wound bobbins according to claim 6, characterized in that the circuit is arranged so that it increases the suction of the suction nozzle in stages. Kreuzspulen herstellende Textilmaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Einrichtung (14) zum Verändern der Saugwirkung mittels des Antriebs (15) in vorbestimmbaren Zeitfolgen zwischen vorbestimmbaren Öffnungsstellungen verstellbar ist.Textile machine producing cross-wound bobbins according to one of claims 1 to 3, characterized in that the device (14) for changing the suction effect by means of the drive (15) in predeterminable time sequences between predeterminable open positions is adjustable.
EP20060003338 2005-04-01 2006-02-18 Textile machine making cross-wound bobbins Expired - Fee Related EP1707524B1 (en)

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DE200510014887 DE102005014887A1 (en) 2005-04-01 2005-04-01 Cheese making textile machine

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ITMI20110978A1 (en) * 2011-05-30 2012-12-01 Savio Macchine Tessili Spa SUCTION DEVICE FOR SERVICE TROLLEYS FOR OPEN-END YARNS
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DE102005014887A1 (en) 2006-10-05
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EP1707524B1 (en) 2010-04-28
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CN100577546C (en) 2010-01-06
JP2006282394A (en) 2006-10-19

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