EP2985251A1 - Procede et dispositif destines a eviter les enroulements d'images lors de l'enroulement d'une bobine croisee - Google Patents

Procede et dispositif destines a eviter les enroulements d'images lors de l'enroulement d'une bobine croisee Download PDF

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Publication number
EP2985251A1
EP2985251A1 EP15002029.5A EP15002029A EP2985251A1 EP 2985251 A1 EP2985251 A1 EP 2985251A1 EP 15002029 A EP15002029 A EP 15002029A EP 2985251 A1 EP2985251 A1 EP 2985251A1
Authority
EP
European Patent Office
Prior art keywords
drive drum
acceleration
phase
deceleration
cross
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP15002029.5A
Other languages
German (de)
English (en)
Inventor
Torsten Forche
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.)
Saurer Spinning Solutions GmbH and Co KG
Original Assignee
Saurer Germany GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saurer Germany GmbH and Co KG filed Critical Saurer Germany GmbH and Co KG
Publication of EP2985251A1 publication Critical patent/EP2985251A1/fr
Withdrawn legal-status Critical Current

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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
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/38—Arrangements for preventing ribbon winding ; Arrangements for preventing irregular edge forming, e.g. edge raising or yarn falling from the edge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a method for avoiding image windings during winding of a cross-wound bobbin and to an apparatus for carrying out such a method.
  • Cross-wound bobbins are produced by corresponding textile machines, which typically consist of a multiplicity of similar work stations, each producing a cross-wound bobbin, which are provided by means which are central to the textile machine, such as e.g. be supplied with a power supply.
  • a textile machine may, in particular, be an automatic winder which wraps a plurality of relatively small-volume spinning cops into a cross-wound bobbin having a substantially more yarn material, or else a spinning machine.
  • the thread is wound obliquely to the longitudinal axis of the cross-wound bobbin.
  • the thread initially moves, e.g. with an inclination to the right from the left end face of the cheese to its right, then after reaching the right front side to change the inclination to the left and be moved back to the left end, whereby a so-called double stroke is terminated and by changing the inclination Crossing angle of the thread on the cheese is formed.
  • a grooved drum with Kehrgewinderillen thread guide a cost-effective and therefore often used option.
  • such a grooved drum is used simultaneously to drive the cross-wound bobbin.
  • the then also drum drive groove drum is in frictional engagement with the cheese and the peripheral speeds of the drive drum and cheese are the same except for certain differences caused by slippage.
  • This situation occurs e.g. whenever a double stroke completes one or more complete reels.
  • the threads are then at such locations then, directly or separately by thread interleaves, one above the other or closely to each other and thereby produce at these points a) a higher package density and b) an unstable stratification.
  • the former has disadvantages in dyeing the bobbin, since such densified areas are impregnated weaker than the other sites and thus only unevenly colored.
  • the latter has disadvantages with respect to the coil stability and the run-off properties during subsequent unwinding of the cross-wound bobbin, since the layered layers of thread can slip off and become jammed together.
  • the inventor has recognized that compared to the EP 0 399 243 B1 a sufficient or even improved image disturbance can be achieved even if you shorten the deceleration phase of the drive drum so that you from the time in which the peripheral speed of the drive drum has fallen to the cheese, replaced by a non-driven freewheel, from this point in time the deceleration phase replaced by a synchronization phase. Because unlike in the EP 0 399 243 B1 In the opinion that synchronous phases should be completely avoided, the inventor has realized that synchronized phases of limited length are perfectly acceptable.
  • the sequences according to the invention from acceleration, deceleration and synchronization phases can be followed directly one after the other, ie the entire drive can be composed of these phases.
  • these phases can only occasionally, for example, at the diameters critical for the images of the cheese, can be used, while otherwise the drive drum can be operated for example at a constant peripheral speed. Again, this can give acceptable image disturbances in certain situations.
  • the periods of acceleration and deceleration phases may be determined by terminating the acceleration phases at the time when the peripheral speed of the drive drum reaches an upper limit speed and terminating the synchronization phases at the time when the peripheral speed of the drive drum stops reached lower limit speed.
  • the acceleration torque is determined such that at a predetermined by a user of the method ratio of acceleration to deceleration predetermined by the user of the method braking phase ratio (v o - v bg ) / (v o -v u ), where v o is the upper limit speed, v u is the lower limit speed, and v bg is the peripheral speed of the drive drum at the transition from the brake to the synchronization phase.
  • the brake phase ratio can be set directly the proportion of the braking phase. The smaller the braking phase ratio, the shorter the braking phase and the lower the energy requirement of the process.
  • the braking phase ratio should be chosen as small as possible from an energy saving point of view, that is, with an acceptable picture disturbance.
  • the determination of the acceleration torque BD ges to the predetermined braking phase ratio BPV vorg can eg iteratively be done by starting from a standard acceleration torque BD St and the brake phase ratio BPV St at BD St measures. If BPV St > BPV vorg , one reduces the acceleration torque by a certain amount, which corresponds to the desired accuracy for torque determination. This is iterated until the predetermined brake-phase ratio BPV is approached. At BPV St ⁇ BPV vorg one increases the acceleration torque in a corresponding manner.
  • a device which may be in particular a winding unit of a winding machine or a spinning machine and the latter in particular an open-end spinning machine, hardware only the usual known components, while the procedures can be stored as software in a control unit of the device.
  • this control unit can be separately attached to each of these workstations or centrally on the textile machine and can also perform other independent of the invention control tasks.
  • Figures 1 and 2 are schematically illustrated in front and side view simplified according to the invention a winding unit 1 of a winding machine.
  • a cross-wound bobbin 8 mounted in a coil holder 9 is driven by a drive drum 2 by means of friction.
  • a withdrawn from a cop 28 thread 7 is wound on the cheese 8.
  • This thread 7 is laid by means of a Kehrgewinderille 2 "of the drive drum 2 parallel to the axis of the cheese 8. This creates the desired Kreuzbewicklung.
  • the drive drum 2 is mounted on a drum shaft 2 'in the machine frame 3 of the winder.
  • This electric motor 6 ', in 4-quadrant operation is controlled, is controlled by an inverter 16, which receives its control commands via a control line 15 'from a spool's own control unit 14.
  • the information about the peripheral speeds of drive drum 2 and cheese 8 receives the control unit 14 of sensors 12, 10 and 31.
  • the sensors 12 and 10 which are for example responsive to the rotation angle, measure and transmit the angular velocities of the drive drum 2 and cross-wound bobbin 8 Lines 11 and 13 to the control unit 14 on, which can then calculate the circumferential speed of the known diameter of the drive drum 2 immediately.
  • the sensor 31 measures the angular position of a coil frame 29, which carries the coil holder 9 and in turn is mounted in a coil frame axis 30. Its signal is given by the sensor 31, e.g. can be designed as a rotational resistance, via a line 32 to the control unit 14, which then calculates the diameter of the cheese 8 from the angular position of the coil frame 29 and with the transmitted from the sensor 10 angular velocity then the peripheral speed of the cheese 8.
  • the peripheral speed of the cheese 8 also by a direct measurement of the yarn speed by a sensor which is traversed by the yarn and e.g. based on the cross-correlation or LDA principle.
  • the thread speed is then converted into the circumferential speed of the cross-wound bobbin 8 by means of connections well-known to those skilled in the art.
  • the instantaneous diameter of the cross-wound bobbin 8 can then be determined from the angular speeds of the drive drum 2 and cross-wound bobbin 8 as well as the known diameter of the drive drum 2. In the simplest variant, one can then view this diameter as constant until the next diameter determination in the next slip-free phase and calculate the peripheral speed of the cheese 8 with this diameter from its angular velocity. In more specific variants, however, the increase in diameter can also be calculated over the known angular speed of the cheese 8 over time, if the other known variables such as thread diameter and, for example, the yarn diameter are used. Traversing speed of the cross winding used.
  • a thread monitor 26 which is arranged in the course of the yarn 7 and which is likewise connected to the control unit 14 via a line 27.
  • This thread monitor 26 indicates the absence of the thread 7, that is, a thread break, on, the control unit 14 via the control line 15 'and the inverter 16, the electric motor 6' de-energized.
  • inventive method can be, for example, with otherwise unchanged use of known components, such as in Figures 1 and 2 illustrated by realizing a change in the running in the control unit 14 software.
  • This software then provides for an inventive temporal sequence of acceleration, deceleration and synchronization phase, which is also referred to as Schmstörzyklus BZ and schematically in FIG. 3 is shown as a representation of the evolution of the peripheral velocities v with respect to the time t.
  • the acceleration phase BP starts here from a substantially synchronous state, ie from a state in which the peripheral speed v Tr of the drive drum 2 and substantially also the peripheral speed v Kr of the cheese 8 are equal to the lower limit speed v u . Then, the electric motor 6 'is applied via the inverter 16 with a constant positive current, for example, 1.76 A, to the end of the acceleration phase BP, which is achieved when the peripheral speed v Tr of the drive drum 2 reaches the upper limit speed v o , Due to their inertia and the limited frictional coupling of the cheese 8 to the drive drum 2 can in the acceleration phase BP, the cheese 8 the drive drum 2 follow only delayed, the peripheral speed v Kr of the cheese 8 is thus always below the peripheral speed v Tr of the drive drum 2. In other words, between these two speeds, a slip S builds up.
  • the acceleration phase BP changes over to the deceleration phase AP.
  • the electric motor 6 ' is supplied via the inverter 16 with a constant negative current, eg -0.64 A, until the end of the deceleration phase AP, which is reached when the peripheral speeds v Tr of the drive drum 2 and v Kr of the cross-wound bobbin 8 assume the same value as in FIG. 3 is designated as v bg .
  • the peripheral speed v Kr of the cross drum 8 thus continues to increase, but at an increasingly slower rate, while the peripheral speed v Tr of the drive drum 2 decreases due to the braking.
  • the control unit 14 terminates the deceleration phase AP and initiates the synchronization phase GP by switching the motor 6 'de-energized.
  • the drive drum 2 and the package 8 slower due to their inertia, the frictional engagement between them ensuring that their circumferential velocities v TR and v Kr remain essentially the same.
  • the control unit 14 terminates the synchronization phase GP as soon as the peripheral speed v Tr of the drive drum 2, and thus also substantially the peripheral speed v Kr of the cheese 8, reaches the lower limit speed v u .
  • the next image disturbance cycle BZ consisting of acceleration phase BP, deceleration phase AP and synchronization phase GP is then started immediately, ie the image disturbance cycles BZ are preferably repeated periodically immediately after one another.
  • the image disturbance cycles BZ are preferably repeated periodically immediately after one another.
  • the image disturbance cycles BZ according to the invention should be used again.
  • the velocity hysteresis ⁇ v can be intuitively expressed as a percentage of the center velocity v M , which percentage should not be set too high, since the upper limit velocity v o is mainly limited by thread breaks, while the center velocity should be as high as possible because of the high productivity aimed for ,
  • the ratio of acceleration to deceleration torque in the embodiment of FIG Figures 1 and 2
  • Typical values for BPV are 15% and 10%.
  • FIGS. 4a and 4b The influence of the brake-phase ratio BPV on the energy consumption in winding a cheese was experimentally investigated and is shown by way of example in FIGS. 4a and 4b, where the energy consumption in Ws / km of coiled yarn length is plotted against the diameter of the cheese in mm. At the beginning of the coil travel, ie at small cross-coil diameters, this energy consumption is very large, but then decreases rapidly towards a saturation value approximately in hyperbolic form. The outliers of individual measurement points from the general curve trace back to thread breaks and have no significance for the basic energy consumption.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Winding Filamentary Materials (AREA)
EP15002029.5A 2014-08-12 2015-07-07 Procede et dispositif destines a eviter les enroulements d'images lors de l'enroulement d'une bobine croisee Withdrawn EP2985251A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014011938.6A DE102014011938A1 (de) 2014-08-12 2014-08-12 Verfahren und Vorrichtung zum Vermeiden von Bildwicklungen beim Wickeln einer Kreuzspule

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
DE102014011938 Previously-Filed-Application 2014-08-12

Publications (1)

Publication Number Publication Date
EP2985251A1 true EP2985251A1 (fr) 2016-02-17

Family

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EP15002029.5A Withdrawn EP2985251A1 (fr) 2014-08-12 2015-07-07 Procede et dispositif destines a eviter les enroulements d'images lors de l'enroulement d'une bobine croisee

Country Status (4)

Country Link
EP (1) EP2985251A1 (fr)
JP (1) JP2016040201A (fr)
CN (1) CN105366428A (fr)
DE (1) DE102014011938A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105926091A (zh) * 2016-06-01 2016-09-07 江苏金喷灌排设备有限公司 喷灌机水管配件制造的倍捻机上的横动机构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3703869A1 (de) * 1987-02-07 1988-08-18 Schlafhorst & Co W Verfahren zum ueberwachen und/oder steuern des spulvorgangs und spulstelle zum ausfuehren des verfahrens
EP0399243B1 (fr) 1989-05-24 1994-11-30 W. SCHLAFHORST AG & CO. Procédé et dispositif pour éviter l'enroulage en ruban lors du bobinage d'une bobine croisée
DE19519542A1 (de) * 1994-06-29 1996-01-04 Schlafhorst & Co W Verfahren und Vorrichtung zur Vermeidung von Bildwicklungen
EP2042877A1 (fr) * 2007-09-28 2009-04-01 Gebrüder Loepfe AG Procédé et dispositif destinés à la mesure de la vitesse d'un fil
EP2746206A2 (fr) * 2012-12-19 2014-06-25 Saurer Germany GmbH & Co. KG Procédé de perturbation d'image et dispositif d'enroulement d'une bobine croisée

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3521152C2 (de) * 1985-06-13 1996-05-30 Schlafhorst & Co W Verfahren und Vorrichtung zum Vermeiden von Bildwicklungen beim Wickeln einer Kreuzspule
DE102012007467A1 (de) * 2012-04-13 2013-10-17 Oerlikon Textile Gmbh & Co. Kg Verfahren zum Herstellen einer Kreuzspule
JP2013241231A (ja) * 2012-05-18 2013-12-05 Murata Machinery Ltd 糸巻取装置及び糸巻取方法
JP2014019541A (ja) * 2012-07-18 2014-02-03 Murata Mach Ltd 糸監視装置及び糸巻取機
JP2014024652A (ja) * 2012-07-27 2014-02-06 Murata Mach Ltd 糸巻取装置
JP2014094786A (ja) * 2012-11-07 2014-05-22 Murata Mach Ltd 綾振装置およびこれを備えた巻取装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3703869A1 (de) * 1987-02-07 1988-08-18 Schlafhorst & Co W Verfahren zum ueberwachen und/oder steuern des spulvorgangs und spulstelle zum ausfuehren des verfahrens
EP0399243B1 (fr) 1989-05-24 1994-11-30 W. SCHLAFHORST AG & CO. Procédé et dispositif pour éviter l'enroulage en ruban lors du bobinage d'une bobine croisée
DE19519542A1 (de) * 1994-06-29 1996-01-04 Schlafhorst & Co W Verfahren und Vorrichtung zur Vermeidung von Bildwicklungen
EP2042877A1 (fr) * 2007-09-28 2009-04-01 Gebrüder Loepfe AG Procédé et dispositif destinés à la mesure de la vitesse d'un fil
EP2746206A2 (fr) * 2012-12-19 2014-06-25 Saurer Germany GmbH & Co. KG Procédé de perturbation d'image et dispositif d'enroulement d'une bobine croisée

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105926091A (zh) * 2016-06-01 2016-09-07 江苏金喷灌排设备有限公司 喷灌机水管配件制造的倍捻机上的横动机构

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CN105366428A (zh) 2016-03-02
DE102014011938A1 (de) 2016-02-18
JP2016040201A (ja) 2016-03-24

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