EP0391101B1 - Spooling machine - Google Patents

Spooling machine Download PDF

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Publication number
EP0391101B1
EP0391101B1 EP90104897A EP90104897A EP0391101B1 EP 0391101 B1 EP0391101 B1 EP 0391101B1 EP 90104897 A EP90104897 A EP 90104897A EP 90104897 A EP90104897 A EP 90104897A EP 0391101 B1 EP0391101 B1 EP 0391101B1
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EP
European Patent Office
Prior art keywords
speed
contact roller
mandrel
contact
package
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.)
Expired - Lifetime
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EP90104897A
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German (de)
French (fr)
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EP0391101A1 (en
Inventor
Armin Wirz
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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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
    • B65H54/40—Arrangements for rotating packages
    • B65H54/42—Arrangements for rotating packages in which the package, core, or former is rotated by frictional contact of its periphery with a driving surface
    • 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
    • B65H67/04—Arrangements for removing completed take-up packages and or replacing by cores, formers, or empty receptacles at winding or depositing stations; Transferring material between adjacent full and empty take-up elements
    • B65H67/044—Continuous winding apparatus for winding on two or more winding heads in succession
    • B65H67/048—Continuous winding apparatus for winding on two or more winding heads in succession having winding heads arranged on rotary capstan head
    • 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

  • This invention relates to an automatic winder for the "continuous" (lossless) winding of continuous filaments, in particular but not exclusively synthetic threads.
  • Such an automat comprises two or more winding mandrels, one of which is used to wind the thread, while the other is prepared in a standby position, so that the thread can be transferred to the second mandrel to continue the winding when the package on the first mandrel is completed ( "Reel change").
  • spindle drive or direct drive
  • the thread runs around the so-called contact roller on the package during the normal winding process. This contact roller exerts a predetermined contact pressure on the forming package. If necessary, it also serves as a guide for the thread between a traverse and the pack and / or supplies a signal representing the peripheral speed of the pack to a controller for the bobbin drive.
  • the contact roller is in contact with the package and the roller speed is controlled such that the peripheral speed of the roller is kept equal to the delivery speed of the thread.
  • This contact is interrupted during the coil change and must be restored after the change - a suitable method has been described in our US Pat. No. 4,548,366 (EP-A-182 389 and EP-A-200 234).
  • the bobbin changing process is a delicate operation, which is particularly associated with the risk of a breakdown of the thread tension.
  • the peripheral speed of the full package can be kept constant during the change without any problems after the contact between the contact roller and the package has been interrupted until the thread is transferred to the other mandrel - see in this connection USPS 4 487,374 (EP-A-80076).
  • it is also necessary to interrupt the traversing of the thread This represents a reduction in the effective "take-up speed" for the thread, which causes a corresponding decrease in the thread tension. This effect has not been taken into account in the prior art.
  • the speed of the contact roller should be increased during the bobbin change.
  • This increase in speed can be carried out immediately after the contact between the full pack and the contact roller has been interrupted and can take place “at a jump”, at least in comparison with an increase in the pack speed.
  • the increase in the peripheral speed of the contact roller helps to keep the thread tension in the thread path above this roller in spite of the effective switching off of the To keep traversing at a suitable level.
  • the increase in speed of the contact roller can be reversed after restarting the traversing movement of the thread, but it can prove to be advantageous not to reduce the speed of the contact roller again immediately after resuming the packaging, but only after a transition phase. During this transition phase, the thread flow can calm down again after the "disturbances" of the changing process.
  • FIG. 1A A winder according to FIG. 1A has been described in detail in our European patent specification No. 73 930 and is accordingly only indicated here.
  • the frame 10 carries two spools 12, 14.
  • Each mandrel 12, 14 is carried by a pivot arm 16, 18 and is thus pivotable about a pivot axis 20, 22 between a respective doff position (shown) and an operating position in contact with a contact roller 24.
  • the thread (not shown) is delivered in operation via a traversing (not shown) to the contact roller and therefore to a spool mandrel in the operating position, a package (spool) being formed on the mandrel.
  • the mandrel is driven in rotation about its own longitudinal axis.
  • a bobbin change is carried out, the mandrel with the full package being pivoted back into its doff position and the second mandrel being moved into the operating position.
  • the second mandrel takes over the thread and continues the winding process without interruption, for which the second mandrel must now rotate about its own longitudinal axis, but the first mandrel is braked to a standstill for the doffing.
  • the machine according to FIG. 1B is also able to carry out such a lossless exchange process, for which purpose the two mandrels 12, 14 are not each carried on a swivel arm but together by a turret head 26.
  • the turret is mounted in the frame such that it can be rotated about an axis 28 in such a way that the mandrels can be brought alternately from the doff position (below) into an operating position in contact with the contact roller 24.
  • the latter is carried by a carriage 30 that can be moved up and down.
  • Figure 2 shows a drive system with appropriate regulation that is suitable for both types of coils ( Figure 1A and 1B).
  • Reference number 12A indicates a frequency-controlled, electric drive motor which is coupled directly to the mandrel 12 and can drive it during and after the winding travel - the reference numbers 14A, 24A indicate corresponding drive motors for the second mandrel 14 and the contact roller 24.
  • Last motor is also connected to a tachometer signal generator 30, which generates a signal representing the speed of the contact roller.
  • Each drive motor 12A, 14A is supplied with energy via a respective frequency converter 32, 34, the instantaneous feed frequency being determined by a respective controller 36, 38. Both controllers 36, 38 receive a setpoint signal from a common, adjustable setpoint generator 40. During the winding travel, the working regulator 36 or 38 (ie the regulator of the winding mandrel 12 or 14) receives an actual value signal from the tachometer signal generator 30 via a switching means 41, which during the Switching procedure is switched.
  • the oscillation is indicated in FIG. 2 by its drive motor 42, which is also frequency-controlled by the control unit 44 containing the controllers 36, 38 via a frequency converter 46. Due to the traversing, the thread is moved back and forth along the mandrel axis during operation in order to enable the desired pack structure.
  • the speed of the motor 42 in relation to the regulated speed of the motor 12A or 14A, e.g. a so-called wild winding or a precision coil or a step precision winding can be built up.
  • the regulation basically corresponds to that of the European patents EP-C-182 389 and EP-C-94 483; for a winder according to FIG. 1B basically corresponds to the regulation in US Pat. No. 4,765,552.
  • FIG. 3 This diagram shows the states of the three elements mandrel 12 (motor 12A), mandrel 14 (motor 14A) and contact roller 24 (motor 24A) over time on the horizontal axis.
  • the speed of the motor 14A must be continuously reduced via the winding travel in order to take into account the constantly increasing diameter of this package with a constant delivery speed of the thread.
  • This "winding operation" of the motor 14A is regulated by the controller 38 by means of a target / actual comparison, since the package is continuously in contact with the contact roller 24, so that the tachometer signal generator 30 emits a feedback signal.
  • mandrel 12 is set in rotation at time To, for which purpose motor 12A is frequency-controlled from the setpoint generator via controller 36 in order to reproduce a predetermined ramp-up curve K.
  • This acceleration is only controlled (and not regulated) since no feedback signal is generated for mandrel 12.
  • the contact roller 24 is driven at a constant speed, which corresponds to the delivery speed of the thread.
  • the traversing motor 42 is also driven at a constant speed - the state of this motor is not shown in FIG. 3 because it does not change during the changeover process.
  • the pack reaches the specified target dimension and a spool change is initiated.
  • the empty mandrel 12 has previously reached an alternating speed W, which speed can represent a slight overspeed in relation to the delivery speed of the thread - thus the thread tension during the Handover phase is maintained.
  • the normal winding of the thread on the mandrel 14 is now canceled by suddenly moving the mandrel away from the contact roller. The thread is still included in the pack on the same mandrel, since the transfer has not yet taken place.
  • control loop is also terminated via the contact roller, so that the control unit 44 can now only perform a control function in relation to the mandrel drive 14A.
  • this control slightly accelerates the speed of motor 14A and spool 14 with the full package to increase the effective take-up speed and maintain thread tension.
  • the control unit 44 causes the contact roller motor 24A to accelerate for the same purpose. After a brief acceleration, the contact roller speed is stabilized again at a higher level.
  • the mandrel motor 14 (with the full package) continues to be accelerated relatively slowly (even after the speed increase from the contact roller has ended), so that the thread is kept taut during the change.
  • the mandrel 12 with the caught thread comes into contact with the contact roller 24, which is still driven at an increased speed (the speed of the contact roller is adjusted to the speed of the controlled mandrel 12).
  • the tachometer signal generator now again provides a feedback signal which is used to regulate the speed of the mandrel 12. - This speed now runs down a predetermined "ramp" R.
  • the speed of the mandrel is slowed down because the diameter of the packing builds up, but the negative acceleration up to the end T5 of the ramp R is somewhat steeper than during normal coil operation, which occurs after time T5.
  • the ramp R is maintained until the thread has found "rest” again - in this period T3 to T5 the traversing movement is started again, which can cause a tension peak.
  • the controller 42 determines for the contact roller 24 the relatively high speed up to an adjustable time T4 between T3 and T5.
  • the controller After T4, the controller also determines a negative acceleration B for the contact roller 24 until time T5 when the contact roller is driven again at the operating speed.
  • the effective speed of the contact roller is only partially determined by the controller between T3 and T5 - in practice, this speed is followed by a curve KK (dashed line), which is also influenced by the transmission of a torque from the mandrel 12.
  • Phase B is selected in such a way that the contact roller 24 operates again at the desired speed at the time T5, so that the normal speed at this time Operating condition prevails (both for mandrel 12 and for contact roller 24).
  • the mandrel 14 follows a more or less predetermined braking curve, which, however, is only initiated after the point in time T5. Since this curve has no significance for the invention, it is not described in more detail here.
  • each mandrel can take up more than one thread at the same time and form it into a respective package.
  • the sequence of the changing steps and their time relationships are determined by a programmable controller (not shown) in the control unit 42.
  • a programmable controller (not shown) in the control unit 42.
  • Such programmable controls are known and are not described here - they can be dependent partly on clock signals and partly on sensors (for a step that has taken place).

Description

Diese Erfindung bezieht sich auf einen Spulautomat zum "kontinuierlichen" (verlustlosen") Aufwinden von Endlosfilamenten, insbesondere aber nicht ausschliesslich synthetischen Fäden.This invention relates to an automatic winder for the "continuous" (lossless) winding of continuous filaments, in particular but not exclusively synthetic threads.

Ein solcher Automat umfasst zwei oder mehr Spulendorne, wovon einer zum Aufwinden des Fadens gebraucht wird, während der andere in einer Bereitschaftsposition aufbereitet wird, sodass der Faden beim Fertigstellen der Packung auf dem ersten Dorn an den zweiten Dorn zur Fortsetzung des Aufwindens übergeben werden kann ("Spulenwechsel"). Bei hohen Liefergeschwindigkeiten des Fadens (z.B. oberhalb 4000 m/min) kann es vorteilhaft sein, jeden Spulendorn mit einem eigenen Antrieb zu versehen ("Spindelantrieb" oder Direktantrieb). Trotzdem läuft der Faden während dem normalen Spulverfahren um eine sogenannte Kontaktwalze auf die Packung. Diese Kontaktwalze übt einen vorbestimmten Anpressdruck auf die bildende Packung aus. Gegebenenfalls dient sie auch als Führung für den Faden zwischen einer Changierung und der Packung und/oder liefert ein die Umfangsgeschwindigkeit der Packung darstellendes Signal an einen Regler für den Spulenantrieb.Such an automat comprises two or more winding mandrels, one of which is used to wind the thread, while the other is prepared in a standby position, so that the thread can be transferred to the second mandrel to continue the winding when the package on the first mandrel is completed ( "Reel change"). At high thread speeds (e.g. above 4000 m / min), it can be advantageous to provide each spool with its own drive ("spindle drive" or direct drive). Nevertheless, the thread runs around the so-called contact roller on the package during the normal winding process. This contact roller exerts a predetermined contact pressure on the forming package. If necessary, it also serves as a guide for the thread between a traverse and the pack and / or supplies a signal representing the peripheral speed of the pack to a controller for the bobbin drive.

Während des normalen Spulverfahrens, (der "Spulreise") steht die Kontaktwalze in Berührung mit der Packung und die Walzendrehzahl wird derart gesteuert, dass die Umfangsgeschwindigkeit der Walze der Liefergeschwindigkeit des Fadens gleich gehalten wird. Diese Berührung wird während dem Spulenwechsel unterbrochen und muss nach dem Wechsel wiederhergestellt werden - ein dazu geeignetes Verfahren ist in unserem US Patent 4 548 366 (EP-A-182 389 und EP-A-200 234) beschrieben worden.During the normal winding process (the "winding trip"), the contact roller is in contact with the package and the roller speed is controlled such that the peripheral speed of the roller is kept equal to the delivery speed of the thread. This contact is interrupted during the coil change and must be restored after the change - a suitable method has been described in our US Pat. No. 4,548,366 (EP-A-182 389 and EP-A-200 234).

Das Spulenwechselverfahren ist eine heikle Operation, welche insbesondere mit dem Risiko eines Zusammenbruches der Fadenspannung behaftet ist. Zur Verminderung dieses Risikos kann bei einem Spulautomat mit Spindelantrieb (direktem Antrieb) die Umfanggeschwindigkeit der vollen Packung während des Wechsels problemlos nach der Unterbrechung der Berührung zwischen der Kontaktwalze und der Packung bis zur Übergabe des Fadens an den anderen Dorn konstant gehalten werden - siehe in diesem Zusammenhang USPS 4 487 374 (EP-A-80076). Zum Ausführen des Spulenwechsels ist es aber auch notwendig, die Changierung des Fadens zu unterbrechen. Dies stellt eine Reduzierung der effektiven "Aufnahmegeschwindigkeit" für den Faden dar, was eine entsprechende Abnahme der Fadenspannung verursacht. Diese Wirkung ist im Stand der Technik nicht berücksichtigt worden.The bobbin changing process is a delicate operation, which is particularly associated with the risk of a breakdown of the thread tension. To lessen this In the case of an automatic winder with a spindle drive (direct drive), the peripheral speed of the full package can be kept constant during the change without any problems after the contact between the contact roller and the package has been interrupted until the thread is transferred to the other mandrel - see in this connection USPS 4 487,374 (EP-A-80076). To carry out the bobbin change, it is also necessary to interrupt the traversing of the thread. This represents a reduction in the effective "take-up speed" for the thread, which causes a corresponding decrease in the thread tension. This effect has not been taken into account in the prior art.

Es ist gemäss der US-PS-4552313 bekannt, beim Spulenwechsel in einem Spulautomat mit Spindelantrieb die Drehzahl des die volle Packung tragenden Dornes nach Unterbrechung der Berührung zwischen dieser Packung und der Kontaktwalze bis zur Übergabe des Fadens an den anderen Dorn zu erhöhen. Die Umfangsgeschwindigkeit der vollen Packung nimmt entsprechend zu und hilft dabei eine ausreichende Fadenspannung aufrechtzuhalten.It is known according to US-PS-4552313 to increase the speed of the mandrel carrying the full package after interrupting the contact between this package and the contact roller until the thread is transferred to the other mandrel when changing the bobbin in an automatic winder with spindle drive. The peripheral speed of the full package increases accordingly and helps to maintain sufficient thread tension.

Es werden aber heutzutage sehr schwere Packungen (bis zu 50 kg) hergestellt, sodass die Trägheit der vollen Packung eine ausreichende Beschleunigung der Packungsdrehzahl bei einer vernünftigen Leistung des Dornantriebsmotors verhindern mag.However, very heavy packs (up to 50 kg) are manufactured nowadays, so that the inertia of the full pack may prevent sufficient acceleration of the pack speed with a reasonable performance of the mandrel drive motor.

Gemäss einem Aspekt dieser Erfindung wird daher vorgeschlagen, dass während des Spulenwechsels die Drehzahl der Kontaktwalze erhöht werden sollte. Diese Drehzahlerhöhung kann sofort nach der Unterbrechung der Berührung zwischen der vollen Packung und der Kontaktwalze durchgeführt werden und kann, mindestens im Vergleich mit einer Erhöhung der Packungsdrehzahl, "sprunghaft" stattfinden. Die Zunahme der Umfangsgeschwindigkeit der Kontaktwalze hilft, die Fadenspannung im Fadenlauf oberhalb dieser Walze trotz des effektiven Ausschaltens der Changierung auf einem geeigneten Niveau zu halten. Die Drehzahlerhöhung der Kontaktwalze kann nach dem Wiederingangsetzen der Changierbewegung des Fadens rückgängig gemacht werden, allerdings kann es sich als vorteilhaft erweisen, die Kontaktwalzendrehzahl nicht sofort nach Wiederaufnahme des Packungsbildens, sondern erst nach einer Übergangsphase, wieder zu reduzieren. Während dieser Übergangsphase kann sich der Fadenlauf nach den "Störungen" des Wechselverfahrens wieder beruhigen.According to one aspect of this invention, it is therefore proposed that the speed of the contact roller should be increased during the bobbin change. This increase in speed can be carried out immediately after the contact between the full pack and the contact roller has been interrupted and can take place “at a jump”, at least in comparison with an increase in the pack speed. The increase in the peripheral speed of the contact roller helps to keep the thread tension in the thread path above this roller in spite of the effective switching off of the To keep traversing at a suitable level. The increase in speed of the contact roller can be reversed after restarting the traversing movement of the thread, but it can prove to be advantageous not to reduce the speed of the contact roller again immediately after resuming the packaging, but only after a transition phase. During this transition phase, the thread flow can calm down again after the "disturbances" of the changing process.

Unter Umständen kann es sich zudem als vorteilhaft erweisen, die Drehzahl der neuen Packung während der Übergangsphase trotz Berührung zwischen der Packung und der Kontaktwalze nicht gemäss dem Regelprogramm des normalen Spulverfahrens (der Spulreise), sondern in Anpassung an die noch erhöhte Drehzahl der Kontaktwalze, zu bestimmen, sodass das normale Regelprogramm zur kontinuierlichen Reduzierung der Packungsdrehzahl in Abhängigkeit vom Packungsaufbau erst ab dem Ende der Übergangsphase zur Geltung kommt.Under certain circumstances, it may also prove to be advantageous not to increase the speed of the new pack during the transition phase, despite contact between the pack and the contact roller, in accordance with the control program for the normal winding process (the winding cycle), but in adaptation to the increased speed of the contact roller determine that the normal control program for continuously reducing the pack speed depending on the pack structure only comes into effect at the end of the transition phase.

Ausführungsbeispiele werden nun anhand der Figuren der Zeichnungen näher erläutert. Es zeigt:

Figur 1A und 1B
schematisch je eine Variante eines Spulautomaten bekannter Bauart.
Figur 2
schematisch ein Blockschema einer Regulierung zur Anwendung mit einem Spulautomaten gemäss Figur A oder B.
Figur 3
ein Ablaufdiagramm eines sogenannten Wechselverfahrens, das mit der Regulierung gemäss Figur 2 durchgeführt werden kann.
Exemplary embodiments are now explained in more detail with reference to the figures in the drawings. It shows:
Figures 1A and 1B
schematically each variant of a known automatic winder.
Figure 2
schematically a block diagram of a regulation for use with an automatic winder according to Figure A or B.
Figure 3
a flow diagram of a so-called change process, which can be carried out with the regulation according to Figure 2.

Ein Spulautomat gemäss Figur 1A ist in unserer europäischen Patentschrift Nr. 73 930 ausführlich beschrieben worden und ist hier dementsprechend nur angedeutet. Das Gestell 10 trägt zwei Spulendorne 12, 14. Jeder Dorn 12, 14 ist von einem Schwenkarm 16, 18 getragen und ist damit schwenkbar um eine Schwenkachse 20, 22 zwischen einer jeweiligen Doffposition (gezeigt) und einer Betriebsposition in Berührung mit einer Kontaktwalze 24. Der Faden (nicht gezeigt) wird in Betrieb über eine nicht-gezeigte Changierung an die Kontaktwalze und daher an einen Spulendorn in der Betriebsposition geliefert, wobei eine Packung (Spule) auf den Dorn gebildet wird. Dazu wird der Dorn in Rotation um die eigene Längsachse angetrieben.A winder according to FIG. 1A has been described in detail in our European patent specification No. 73 930 and is accordingly only indicated here. The frame 10 carries two spools 12, 14. Each mandrel 12, 14 is carried by a pivot arm 16, 18 and is thus pivotable about a pivot axis 20, 22 between a respective doff position (shown) and an operating position in contact with a contact roller 24. The thread (not shown) is delivered in operation via a traversing (not shown) to the contact roller and therefore to a spool mandrel in the operating position, a package (spool) being formed on the mandrel. For this purpose, the mandrel is driven in rotation about its own longitudinal axis.

Wenn die Packung eine vorgegebene Grösse (Faden-Länge bzw. Durchmesser) erreicht hat, wird ein Spulenwechseldurchgeführt, wobei der Dorn mit der vollen Packung in seine Doffposition zurückgeschwenkt und der zweite Dorn in die Betriebsposition bewegt wird. Dabei übernimmt der zweite Dorn den Faden und setzt das Aufwindeverfahren ununterbrochen fort, wozu der zweite Dorn nun um die eigene Längsachse drehen muss, während aber der erste Dorn für das Doffen zum Stillstand gebremst wird.When the package has reached a predetermined size (thread length or diameter), a bobbin change is carried out, the mandrel with the full package being pivoted back into its doff position and the second mandrel being moved into the operating position. The second mandrel takes over the thread and continues the winding process without interruption, for which the second mandrel must now rotate about its own longitudinal axis, but the first mandrel is braked to a standstill for the doffing.

Die Maschine gemäss Fig 1B ist auch imstande, ein solches verlustloses Wechselverfahren durchzuführen,wozu aber die zwei Dorne 12, 14 nicht je auf einen Schwenkarm sondern gemeinsam von einem Revolverkopf 26 getragen werden. Der Revolverkopf ist im Gestell derart drehbar um eine Achse 28 montiert, dass die Dorne wechselweise aus der Doffposition (unten) in eine Betriebsposition in Berührung mit der Kontaktwalze 24 gebracht werden können.Letztere ist von einem auf- und abbewegbaren Schlitten 30 getragen.The machine according to FIG. 1B is also able to carry out such a lossless exchange process, for which purpose the two mandrels 12, 14 are not each carried on a swivel arm but together by a turret head 26. The turret is mounted in the frame such that it can be rotated about an axis 28 in such a way that the mandrels can be brought alternately from the doff position (below) into an operating position in contact with the contact roller 24. The latter is carried by a carriage 30 that can be moved up and down.

Figur 2 zeigt ein Antriebssystem mit entsprechender Regulierung, dass für beide Spulentypen (Figur 1A und 1B) geeignet ist. Mit Bezugszeichen 12A ist ein frequenzgesteuerter, elektrischer Antriebsmotor angedeutet, der direkt mit dem Dorn 12 gekuppelt ist und ihn während und nach der Spulreise antreiben kann - die Bezugszeichen 14A, 24A weisen auf entsprechende Antriebsmotoren für den zweiten Dorn 14 und die Kontaktwalze 24. Letzter Motor ist auch mit einem Tachosignalgeber 30 verbunden, welcher ein die Drehzahl der Kontaktwalze darstellendes Signal erzeugt.Figure 2 shows a drive system with appropriate regulation that is suitable for both types of coils (Figure 1A and 1B). Reference number 12A indicates a frequency-controlled, electric drive motor which is coupled directly to the mandrel 12 and can drive it during and after the winding travel - the reference numbers 14A, 24A indicate corresponding drive motors for the second mandrel 14 and the contact roller 24. Last motor is also connected to a tachometer signal generator 30, which generates a signal representing the speed of the contact roller.

Jeder Antriebsmotor 12A, 14A ist über einen jeweiligen Frequenzumwandler 32, 34 mit Energie gespiesen, wobei die momentane Speisefrequenz von einem jeweiligen Regler 36,38 bestimmt wird. Beide Regler 36, 38 erhalten ein Sollwertsignal von einem gemeinsamen, einstellbaren Sollwertgeber 40. Während der Spulreise erhält der arbeitende Regler 36 oder 38 (d.h. der Regler des spulenden Dornes 12 oder 14) ein Istwertsignal vom Tachosignalgeber 30 über ein Schaltmittel 41, welches während des Wechselverfahrens umgeschaltet wird.Each drive motor 12A, 14A is supplied with energy via a respective frequency converter 32, 34, the instantaneous feed frequency being determined by a respective controller 36, 38. Both controllers 36, 38 receive a setpoint signal from a common, adjustable setpoint generator 40. During the winding travel, the working regulator 36 or 38 (ie the regulator of the winding mandrel 12 or 14) receives an actual value signal from the tachometer signal generator 30 via a switching means 41, which during the Switching procedure is switched.

Die vorher nicht-gezeigte Changierung wird in Figur 2 durch ihren Antriebsmotor 42 angedeutet, welcher auch von der Regler 36, 38 beinhaltenden Steuereinheit 44 über einen Frequenzwandler 46 frequenzgesteuert wird. Durch die Changierung wird in Betrieb der Faden hin und her der Dornachse entlang verschoben, um den gewünschten packungsaufbau zu ermöglichen. Durch die geeignete Steuerung der Drehzahl des Motors 42 im Verhältnis zur geregelten Drehzahl des Motors 12A bzw. 14A kann z.B. eine sogenannte wilde Wicklung oder eine Präzisionsspule oder eine Stufenpräzisionswicklung aufgebaut werden.The oscillation, not previously shown, is indicated in FIG. 2 by its drive motor 42, which is also frequency-controlled by the control unit 44 containing the controllers 36, 38 via a frequency converter 46. Due to the traversing, the thread is moved back and forth along the mandrel axis during operation in order to enable the desired pack structure. By appropriately controlling the speed of the motor 42 in relation to the regulated speed of the motor 12A or 14A, e.g. a so-called wild winding or a precision coil or a step precision winding can be built up.

Für einen Spuler gemäss Figur 1A entspricht die Regulierung grundsätzlich derjenigen der europäischen Patentschriften EP-C-182 389 und EP-C-94 483; für einen Spuler gemäss Figur 1B entspricht die Regulierung grundsätzlich derjenigen der US-Patentschrift 4 765 552.For a winder according to FIG. 1A, the regulation basically corresponds to that of the European patents EP-C-182 389 and EP-C-94 483; for a winder according to FIG. 1B basically corresponds to the regulation in US Pat. No. 4,765,552.

Der Wechselablauf ist schematisch in Figur 3 dargestellt. Dieses Diagramm stellt die Zustände der drei Elemente Dorn 12 (Motor 12A), Dorn 14 (Motor 14A) und Kontaktwalze 24 (Motor 24A) über Zeit auf der horizontalen Achse dar. Zur Zeit To wird der Faden zu einer Packung auf den Dorn 14 gebildet, wobei die Drehzahl des Motors 14A kontinuierlich über die Spulreise reduziert werden muss, um den ständig zunehmenden Durchmesser dieser Packung bei konstanter Liefergeschwindigkeit des Fadens zu berücksichtigen. Dieser "Spulbetrieb" des Motors 14A wird vom Regler 38 durch Soll/Ist Vergleich geregelt, da die Packung kontinuierlich in Berührung mit der Kontaktwalze 24 steht, sodass der Tachosignalgeber 30 ein Rückkoppelungssignal abgibt.The change sequence is shown schematically in FIG. 3. This diagram shows the states of the three elements mandrel 12 (motor 12A), mandrel 14 (motor 14A) and contact roller 24 (motor 24A) over time on the horizontal axis. At time To, the thread is formed into a package on mandrel 14 , The speed of the motor 14A must be continuously reduced via the winding travel in order to take into account the constantly increasing diameter of this package with a constant delivery speed of the thread. This "winding operation" of the motor 14A is regulated by the controller 38 by means of a target / actual comparison, since the package is continuously in contact with the contact roller 24, so that the tachometer signal generator 30 emits a feedback signal.

Da aber diese Packung ihrer vorgegebenen Länge bzw. ihrem vorgegebenen Durchmesser nähert, wird Dorn 12 zur Zeit To in Rotation versetzt, wozu Motor 12A vom Sollwertgeber aus über Regler 36 frequenzgesteuert wird, um eine vorgegebene Hochlaufkurve K nachzuvollziehen. Diese Beschleunigung wird nur gesteuert (und nicht geregelt), da für Dorn 12 kein Rückkopplungssignal erzeugt wird.However, since this pack approaches its predetermined length or its predetermined diameter, mandrel 12 is set in rotation at time To, for which purpose motor 12A is frequency-controlled from the setpoint generator via controller 36 in order to reproduce a predetermined ramp-up curve K. This acceleration is only controlled (and not regulated) since no feedback signal is generated for mandrel 12.

Zur Zeit To wird die Kontaktwalze 24 mit einer konstanten Drehzahl angetrieben, welche der Liefergeschwindigkeit des Fadens entspricht. Obwohl nicht gezeigt, wird der Changiermotor 42 auch mit einer konstanten Drehzahl angetrieben - der Zustand dieses Motors wird in Figur 3 nicht gezeigt, weil er sich während des Wechselablaufes nicht ändert.At time To, the contact roller 24 is driven at a constant speed, which corresponds to the delivery speed of the thread. Although not shown, the traversing motor 42 is also driven at a constant speed - the state of this motor is not shown in FIG. 3 because it does not change during the changeover process.

Zur Zeit T1 erreicht die Packung die vorgegebene Solldimension und ein Spulenwechsel wird eingeleitet. Der leere Dorn 12 ist schon vorher auf eine Wechseldrehzahl W gekommen, wobei diese Drehzahl eine leichte Übergeschwindigkeit im Verhältnis zur Liefergeschwindigkeit des Fadens darstellen kann - somit kann die Fadenspannung während der Übergabephase aufrechterhalten werden. Das normale Aufwickeln des Fadens auf den Dorn 14 wird nun aufgehoben, indem der Dorn plötzlich von der Kontaktwalze weg bewegt wird. Der Faden wird trotzdem weiterhin in die Packung auf den gleichen Dorn aufgenommen, da die Übergabe noch nicht stattgefunden hat.At time T1, the pack reaches the specified target dimension and a spool change is initiated. The empty mandrel 12 has previously reached an alternating speed W, which speed can represent a slight overspeed in relation to the delivery speed of the thread - thus the thread tension during the Handover phase is maintained. The normal winding of the thread on the mandrel 14 is now canceled by suddenly moving the mandrel away from the contact roller. The thread is still included in the pack on the same mandrel, since the transfer has not yet taken place.

Beim Abbruch des normalen Aufwindeverfahrens wird der Regelkreis über die Kontaktwalze auch abgebrochen, sodass die Steuereinheit 44 nun nur noch eine Steuerfunktion inbezug auf den Dornantrieb 14A ausüben kann. Nach dem Zeitpunkt T1 bewirkt diese Steuerung eine leichte Beschleunigung der Drehzahl vom Motor 14A und des Spulendornes 14 mit der vollen Packung um die effektive Aufwickelgeschwindigkeit zu erhöhen und die Fadenspannung aufrechtzuerhalten. Gleichzeitig bewirkt die Steuereinheit 44 eine Beschleunigung des Kontaktwalzenmotors 24A zum gleichen Zweck. Nach einer kurzen Beschleunigung wird die Kontaktwalzendrehzahl auf einem höheren Niveau wieder stabilisiert. Der Dornmotor 14 (mit der vollen Packung), wird weiterhin, (auch nach der Beendigung der Drehzahlerhöhung von der Kontaktwalze), relativ langsam beschleunigt, sodass der Faden während des Wechsels straff gehalten wird.When the normal winding process is terminated, the control loop is also terminated via the contact roller, so that the control unit 44 can now only perform a control function in relation to the mandrel drive 14A. After time T1, this control slightly accelerates the speed of motor 14A and spool 14 with the full package to increase the effective take-up speed and maintain thread tension. At the same time, the control unit 44 causes the contact roller motor 24A to accelerate for the same purpose. After a brief acceleration, the contact roller speed is stabilized again at a higher level. The mandrel motor 14 (with the full package) continues to be accelerated relatively slowly (even after the speed increase from the contact roller has ended), so that the thread is kept taut during the change.

Der Faden wird zur Zeit T2 vom Dorn 12 gefangen und damit übernommen - Einzelheiten der Übergabe sind aus der Literatur bekannt und werden hier nicht wiederholt, es wird aber angenommen, dass Dorn 12 beim Fadenfangen nicht in Berührung mit der Kontaktwalze steht. Vor dem Zeitpunkt T2 muss die Changierbewegung des Fadens aufgehoben werden. Dies wird bekannterweise nicht durch Steuerung des Changiermotors 42 sondern durch abheben des Fadens aus dem Fadenführer bewerkstelligt. Auf jeden Fall, zur Zeit der Uebergabe wird nur ein "Wulst" aus parallelen Windungen (statt Kreuzwindungen) auf der vollen Packung vom Dorn 14 gebildet. Die Aufhebung der Changierbewegung stellt einen besonders heiklen Schritt dar, weil das Risiko eines Fadenspannungskollapses dabei gross ist. Die erhöhte Geschwindigkeit ("Speed-Boost") der Kontaktwalze, die noch leicht steigende Geschwindigkeit der Packung 14 und allenfalls eine leichte "Überdrehzahl" des Dornes 12 sollen alle dazu beitragen, die Auswirkung der Aufhebung der Changierbewegung zu begrenzen.The thread is caught by mandrel 12 at time T2 and thus taken over - details of the handover are known from the literature and are not repeated here, but it is assumed that mandrel 12 is not in contact with the contact roller during thread catching. Before the time T2, the traversing movement of the thread must be canceled. As is known, this is not achieved by controlling the traversing motor 42 but by lifting the thread out of the thread guide. In any case, at the time of transfer, only a "bead" of parallel turns (instead of cross turns) is formed on the full package by mandrel 14. Abolishing the traversing movement is a particularly delicate step because the risk of thread tension collapse is high. The increased The speed ("speed boost") of the contact roller, the still slightly increasing speed of the pack 14 and possibly a slight "overspeed" of the mandrel 12 are all intended to help limit the effect of the cancellation of the traversing movement.

Zur Zeit T3 kommt der Dorn 12, mit dem gefangenen Faden, in Berührung mit der Kontaktwalze 24, die immer noch mit erhöhter Drehzahl angetrieben wird (die Drehzahl der Kontaktwalze wird der Drehzahl des gesteuerten Dornes 12 angepasst). Der Tachosignalgeber liefert nun wieder ein Rückkopplungssignal, welches zur Regelung der Drehzahl vom Dorn 12 gebraucht wird. - diese Drehzahl läuft nun eine vorgegebene "Rampe" R runter. Die Drehzahl des Dornes wird dabei verlangsamt, weil der Durchmesser der Packung sich aufbaut -, die negative Beschleunigung bis zum Ende T5 der Rampe R ist aber etwas steiler als beim normalen Spulenbetrieb, welcher sich nach Zeitpunkt T5 einstellt. Die Rampe R wird beibehalten bis der Faden wieder "Ruhe" gefunden hat - in diesem Zeitraum T3 bis T5 wird nämlich mit der Changierbewegung wieder begonnen, was eine Spannungsspitze hervorrufen kann.At time T3, the mandrel 12 with the caught thread comes into contact with the contact roller 24, which is still driven at an increased speed (the speed of the contact roller is adjusted to the speed of the controlled mandrel 12). The tachometer signal generator now again provides a feedback signal which is used to regulate the speed of the mandrel 12. - This speed now runs down a predetermined "ramp" R. The speed of the mandrel is slowed down because the diameter of the packing builds up, but the negative acceleration up to the end T5 of the ramp R is somewhat steeper than during normal coil operation, which occurs after time T5. The ramp R is maintained until the thread has found "rest" again - in this period T3 to T5 the traversing movement is started again, which can cause a tension peak.

Die Steuerung 42 bestimmt für die Kontaktwalze 24 die relativ hohe Drehzahl bis zu einem einstellbaren Zeitpunkt T4 zwischen T3 und T5.The controller 42 determines for the contact roller 24 the relatively high speed up to an adjustable time T4 between T3 and T5.

Nach T4 bestimmt die Steuerung auch eine negative Beschleunigung B für die Kontaktwalze 24 bis zum Zeitpunkt T5, wenn die Kontaktwalze wieder mit der Betriebsdrehzahl angetrieben wird. Die effektive Drehzahl der Kontaktwalze wird aber zwischen T3 und T5 nur zum Teil von der Steuerung bestimmt - in der Praxis folgt dieser Drehzahl eine Kurve KK (gestrichelt), welche auch durch die Uebertragung eines Drehmoments vom Dorn 12 beeinflusst wird. Die Phase B ist derart gewählt, dass die Kontaktwalze 24 doch zum Zeitpunkt T5 wieder mit der gewünschten Geschwindigkeit arbeitet, sodass zu diesem Zeitpunkt der normale Betriebszustand herrscht (sowohl für Dorn 12 wie auch für Kontaktwalze 24).After T4, the controller also determines a negative acceleration B for the contact roller 24 until time T5 when the contact roller is driven again at the operating speed. The effective speed of the contact roller is only partially determined by the controller between T3 and T5 - in practice, this speed is followed by a curve KK (dashed line), which is also influenced by the transmission of a torque from the mandrel 12. Phase B is selected in such a way that the contact roller 24 operates again at the desired speed at the time T5, so that the normal speed at this time Operating condition prevails (both for mandrel 12 and for contact roller 24).

Der Dorn 14 folgt nach dem Zeitpunkt T4 einer mehr oder weniger vorgegebenen Bremskurve, welche aber zur Sicherheit erst nach dem Zeitpunkt T5 eingeleitet wird. Da diese Kurve für die Erfindung keine Bedeutung hat, wird sie hier nicht näher beschrieben.After the point in time T4, the mandrel 14 follows a more or less predetermined braking curve, which, however, is only initiated after the point in time T5. Since this curve has no significance for the invention, it is not described in more detail here.

Selbstverständlich kann jeder Dorn mehr als einen Faden gleichzeitig aufnehmen und zu einer jeweiligen Packung bilden.Of course, each mandrel can take up more than one thread at the same time and form it into a respective package.

Es ist nämlich bekannt, die Drehzahl der Kontaktwalze während des Spulenwechsels beim sogenannten Reibwalzenantrieb zu erhöhen. In diesem Fall wird der Dorn (und Packung) von der Kontaktwalze angetrieben und die Drehzahlerhöhung soll eine höhere Drehzahl der Packung während dem Wechsel bewirken. Beim Dornantrieb hat die Kontaktwalze aber keinen Einfluss auf die Dorngeschwindigkeit beim Spulenwechsel, da nach Abbruch der Berührung zwischen der Walze und der Packung sogar das Rückkopplungssignal nicht geliefert wird.It is namely known to increase the speed of the contact roller during the spool change in the so-called friction roller drive. In this case the mandrel (and packing) is driven by the contact roller and the increase in speed is intended to increase the speed of the packing during the change. With the mandrel drive, however, the contact roller has no influence on the mandrel speed when changing the bobbin, since even after the contact between the roller and the package has been broken off, the feedback signal is not delivered.

Die Reihenfolge der Wechselschritte und ihre Zeitverhältnisse werden von einer programmierbaren Steuerung (nicht gezeigt) in der Steuereinheit 42 bestimmt. Solche programmierbare Steuerungen sind bekannt und werden nicht hier beschrieben - sie können zum Teil von Taktsignalen und zum Teil von Sensoren (für einen erfolgten Schritt) abhängig sein.The sequence of the changing steps and their time relationships are determined by a programmable controller (not shown) in the control unit 42. Such programmable controls are known and are not described here - they can be dependent partly on clock signals and partly on sensors (for a step that has taken place).

Wenn die Changierbewegung des Fadens auch nach Abbruch der Berührung zwischen der vollen Packung und der Kontaktwalze aufrechterhalten werden kann, wird der Packungsdurchmesser auch während des Wechselvorganges zunehmen. Dies führt zu einer Zunahme der Fadenspannung auch ohne Beschleunigung der Packungsdrehzahl. Unter diesen Umständen kann es ausreichen, die Packungsdrehzahl nach Abbruch der Berührung mit der Kontaktwalze konstant zu halten, (statt sie zu erhöhen, wie in Figur 3 dargestellt).If the traversing movement of the thread can be maintained even after the contact between the full package and the contact roller has been broken off, the package diameter will also increase during the changing process. This leads to an increase in the thread tension even without acceleration of the package speed. In these circumstances, it may be sufficient to change the speed of the pack after the contact has been terminated to keep constant with the contact roller (instead of increasing it as shown in Figure 3).

Wenn dazu der Spulenwechsel, z.B. durch eine langsame Drehbewegung des Revolvers (Fig. 1B), relativ lang dauert, kann die Zunahme des Packungsdurchmessers bei Fortsetzung der Changierbewegung derart gross sein, dass eine leichte Abnahme der Drehzahl der vollen Packung notwendig ist, um überhöhte Fadenspannungen zu vermeiden.If the spool change, e.g. due to a slow rotary movement of the turret (FIG. 1B), which takes a relatively long time, the increase in the package diameter when the traversing movement continues can be so great that a slight decrease in the speed of the full package is necessary in order to avoid excessive thread tension.

Claims (5)

  1. An apparatus for continuously winding up at least one yarn by at least two pegs (12, 14), each provided with an own drive, and a contact roller (24) which during the normal spinning operation is in contact with the package being formed and which is provided with an own drive, characterized by a control unit (44) for the contact roller drive (24A) for effecting an increase of the contact roller speed after the interruption of the contact between the package and the contact roller.
  2. An apparatus as claimed in claim 1, characterized by such a control unit for every peg drive, that during the change of the bobbin the speed of the peg carrying the full package is increased after the interruption of the contact between this package and the contact roller up to the transfer of the yarn to the other peg.
  3. An apparatus as claimed in claim 1, characterized in that the control unit is arranged in such a way that the speed of the full package is continuously increased until the transfer of the yarn.
  4. An apparatus as claimed in one of the previous claims, characterized in that the control unit is arranged in such a way that the increase of the speed of the contact roller (24) is reversed after the renewed start-up of the traversing movement of the yarn.
  5. An apparatus as claimed in claim 4, characterized in that the control unit is arranged in such a way that the increase in the speed of the contact roller (24) is only reduced again after a transitional period, whereby the yarn course may settle down again during this transitional period in accordance with the changing process.
EP90104897A 1989-04-06 1990-03-15 Spooling machine Expired - Lifetime EP0391101B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1280/89 1989-04-06
CH128089 1989-04-06

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EP0391101A1 EP0391101A1 (en) 1990-10-10
EP0391101B1 true EP0391101B1 (en) 1994-05-18

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EP90104897A Expired - Lifetime EP0391101B1 (en) 1989-04-06 1990-03-15 Spooling machine

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US (1) US5082191A (en)
EP (1) EP0391101B1 (en)
JP (1) JP2716837B2 (en)
DE (1) DE59005704D1 (en)

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US6161789A (en) * 1996-08-29 2000-12-19 Neumag - Neumuenstersche Maschinen - Und Anlagenbau Gmbh Automatic winder using one setter for each mandrel, where the setters alternate between controlling the mandrel drive and the contact roll drive

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US5762276A (en) * 1992-10-05 1998-06-09 Toray Engineering Co., Ltd. Yarn winding roller drive
US5605294A (en) * 1993-03-15 1997-02-25 Toray Engineering Co., Ltd. Method for controlling the drive of a yarn winder, and the yarn winder thereof
JP2684337B2 (en) * 1994-04-22 1997-12-03 東レエンジニアリング株式会社 Drive control method for spindle drive type winder
DE19832811A1 (en) * 1997-07-26 1999-01-28 Barmag Barmer Maschf Bobbin winding method
DE19802509A1 (en) * 1998-01-23 1999-07-29 Rieter Ag Maschf Continuous filament winding device
CN1950283B (en) * 2004-05-06 2012-09-05 欧瑞康纺织有限及两合公司 Method and device for continuously winding up several threads
DE102012007987A1 (en) 2011-05-28 2012-11-29 Oerlikon Textile Gmbh & Co. Kg Method for continuous pulling and spooling of multiple threads as yarn sheet in melt spinning process, involves guiding threads of yarn sheet after melt spinning by driven godet with operating speed, where threads are alternatively winded
CN104960981B (en) * 2015-04-14 2017-11-03 郑州中远氨纶工程技术有限公司 Elastomeric yarn coiler device and elastomeric yarn switching method for winding

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EP0073930B1 (en) * 1981-09-03 1986-12-03 Maschinenfabrik Rieter Ag Filament winding machine
JPS5878953A (en) * 1981-11-04 1983-05-12 Teijin Ltd Yarn take-up apparatus
US4548366A (en) * 1982-05-17 1985-10-22 Rieter Machine Works, Ltd. Chuck drive system
JPS59227663A (en) * 1983-06-07 1984-12-20 Teijin Ltd Replacement of thread yarn on turret type automatic taking-up machine and apparatus thereof
JPS6327378A (en) * 1986-07-16 1988-02-05 Teijin Seiki Co Ltd Driving method for winder
US4917319A (en) * 1988-07-06 1990-04-17 Barmag Ag Method of winding yarn packages

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6161789A (en) * 1996-08-29 2000-12-19 Neumag - Neumuenstersche Maschinen - Und Anlagenbau Gmbh Automatic winder using one setter for each mandrel, where the setters alternate between controlling the mandrel drive and the contact roll drive

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JPH03111377A (en) 1991-05-13
US5082191A (en) 1992-01-21
DE59005704D1 (en) 1994-06-23
EP0391101A1 (en) 1990-10-10
JP2716837B2 (en) 1998-02-18

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