EP2497733A2 - Procédé destiné à éviter les enroulements d'images - Google Patents

Procédé destiné à éviter les enroulements d'images Download PDF

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Publication number
EP2497733A2
EP2497733A2 EP12157914A EP12157914A EP2497733A2 EP 2497733 A2 EP2497733 A2 EP 2497733A2 EP 12157914 A EP12157914 A EP 12157914A EP 12157914 A EP12157914 A EP 12157914A EP 2497733 A2 EP2497733 A2 EP 2497733A2
Authority
EP
European Patent Office
Prior art keywords
traversing frequency
stroke
traversing
frequency
change
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Withdrawn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
EP12157914A
Other languages
German (de)
English (en)
Other versions
EP2497733A3 (fr
Inventor
Dietmar Greis
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.)
Rieter Ingolstadt GmbH
Original Assignee
Rieter Ingolstadt GmbH
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 Rieter Ingolstadt GmbH filed Critical Rieter Ingolstadt GmbH
Publication of EP2497733A2 publication Critical patent/EP2497733A2/fr
Publication of EP2497733A3 publication Critical patent/EP2497733A3/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Withdrawn legal-status Critical Current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
    • 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
    • B65H54/28—Traversing devices; Package-shaping arrangements
    • B65H54/2884—Microprocessor-controlled traversing devices in so far the control is not special to one of the traversing devices of groups B65H54/2803 - B65H54/325 or group B65H54/38
    • B65H54/2887—Microprocessor-controlled traversing devices in so far the control is not special to one of the traversing devices of groups B65H54/2803 - B65H54/325 or group B65H54/38 detecting the position of the yarn guide
    • 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 present invention relates to a method and apparatus for preventing image windings when winding cross-wound packages in a wild winding on a textile machine.
  • the yarn is hereby oscillated by a yarn guide on a reciprocating double stroke, wherein the traversing frequency of the yarn guide during the winding cycle is continuously varied within a predetermined deviation range by a nominal frequency to generate a picture disturbance.
  • the coils are driven by a friction roller on its circumference at a constant peripheral speed, so that the speed of the coil from the coil diameter, which builds up gradually depends.
  • the yarn guide is driven at a constant speed, so that the turns ratio, i. H. reduces the number of spool revolutions per double stroke of the thread guide with increasing diameter.
  • Known rotor spinning machines such as the rotor spinning machine R40 of the applicant, have a mechanical device for image disturbance in the form of a Schmstörgetriebes on.
  • the Schmstörgetriebe comprises a cam, which acts on the speed of the yarn guide driving traversing drives. This cam runs over a plurality of double strokes of the thread guide, for example, over 15 double strokes, once to and in this case varies the frequency of the traversing drive within a certain, deviating from the nominal frequency range. Subsequently, the cam again runs over the next 15 double strokes, so that always the same fault cycle is performed periodically.
  • the disadvantage here is that, in particular from a certain larger diameter, can nevertheless lead to image windings and thus the diameter of the coils to be produced is limited. Furthermore, due to the constant repetition of the same disturbance, uneven coil buildup with densified areas may occur. Also, the Rickstörgetriebe is prone to wear and requires regular maintenance.
  • the DE 195 48 257 A1 describes the problems of an inhomogeneous coil structure and the insufficient image disturbance in the usual periodic disturbance functions, such as sawtooth, sine or rectangular functions and proposes to carry out the slope of the periodic disturbance function in the zero crossings very steep and continue the areas in the extreme points with the shortest possible residence time to pass through to prevent the formation of image windings even more effectively. Furthermore, it is described to realize a periodic disturbance function by an electronic control of the drive motor of the thread guides. This makes it possible, within limits, to vary the amplitude and / or the period duration of the periodic disturbance function in order to improve the image disturbance. Nevertheless, this electronic picture disturbance is also based on the periodic repetition of the same disturbance cycle, so that there is still the risk of quality problems with the coils.
  • periodic disturbance functions such as sawtooth, sine or rectangular functions
  • Object of the present invention is therefore to produce a sustainable image interference with good coil quality.
  • a corresponding device for avoiding image windings comprises a control device for controlling the drive of the yarn guide and for generating a picture disturbance by a change in the traversing frequency.
  • a random juxtaposition of individual noise patterns is generated by a setpoint for the traversing frequency from the deviation range is selected by a random generator per interference pattern and the traversing frequency is set by a control device to the respectively selected setpoint.
  • the thread guide set a different value of the traversing frequency. After reaching the respectively set setpoint, the value of the traversing frequency is then kept constant over the further course of the individual stroke or the double stroke.
  • each double stroke or each individual stroke of the thread guide now with the help of a random generator assigned another value of the traversing frequency, so that the image disturbance with great flexibility and even with larger coil diameters without repetitions. An image structure can therefore be permanently avoided even with larger coil diameters.
  • local compressions on the coils are reliably avoided by the different for each double stroke or for each individual stroke of the yarn guide traversing frequency, resulting in improved quality and improved process flow of the coils.
  • a change in the traversing frequency takes place exclusively within a single stroke of the thread guide. Even if only one set value is assigned to each double stroke and not each individual stroke, the change in the traversing frequency takes place in each case only within a single stroke. This causes that over the reversal points of the thread guide no acceleration takes place, but the thread is stored at a constant speed. It has been found that the tendency for Abeller Struktur can thereby be significantly reduced.
  • a disturbance pattern extends over exactly one double stroke, with a different setpoint value for each double stroke is selected and adjusted for the traversing frequency. Since both the size and the distance of the successive setpoint values, which are predetermined in each case for a double stroke, are different, an optimal image disturbance can take place, whereby a repetition of a predetermined pattern does not occur.
  • the device for preventing image windings can be operated in a first mode, in which each individual interference pattern extends over exactly one double stroke.
  • the stated advantages can also be achieved if a different desired value (S) for the traversing frequency (F) is already selected and set for each individual stroke (EH). It is essential that after reaching the predetermined setpoint within the single stroke or the double stroke no change in the traversing frequency more occurs, as this ensures that no integer turns occur.
  • a disturbance pattern extends over a plurality of double strokes, wherein the setpoint selected by the random generator is set in stages and wherein in each case a double stroke or a single stroke is assigned to one stage.
  • a particularly gentle picture disturbance can take place since the speed change from a double stroke or a single stroke to the next is comparatively small.
  • the device for preventing image windings can be operated in a second mode, with the device preferably being switchable between the first and the second mode at any time and optionally also during operation of the textile machine.
  • the desired value is set here in uniform stages. This also contributes to a gentler picture noise, since only a small, always the same speed change per double stroke or each single stroke is performed. It is also advantageous if a rate of change of the traversing frequency is the same at each stage, thus in every step of the rising angle equals the speed increase. This contributes to a uniform winding of the coils.
  • a change in the traversing frequency takes place here outside the edge laying areas of the cross-wound bobbin.
  • the edgebanding areas are particularly sensitive, so that a particularly exact thread placement is important here.
  • Abtrainr be avoided and a quiet coil structure can be made possible, since a change in speed of the thread laying takes place only along the less sensitive bobbin.
  • the drive of the yarn guide is controlled accordingly by the control device.
  • the device for preventing image windings has a corresponding sensor which is connected to the control device and outputs a corresponding signal when the end position is detected.
  • the change of the traversing frequency to the next nominal value is usually completed within a single stroke, so that it is sufficient to detect only one of the end positions. According to a development of the invention, however, it may also be provided to detect both end positions in order to reliably exclude a change in the sensitive edge laying areas.
  • the size of the deviation range from the nominal frequency corresponds to the operating parameters of the machine and / or the yarn material to be wound is preset at an operating unit of the control device.
  • a comparatively large range of deviation can be set, since the changes are made very gently, while in a disturbance cycle, which extends only over a single stroke or a single double stroke, the size of the range of deviation can be set correspondingly lower in order to avoid too large jumps in the traversing frequency from one single stroke or double stroke to the next.
  • the device comprises a display device, in particular a visual display device.
  • the activity of the image disturbance can thereby be easily controlled by an operator.
  • Fig. 1 shows an example of a textile machine 1, in this case a spinning machine, to which the inventive method and apparatus according to the invention can be advantageously used.
  • the spinning machine 1 has a plurality of workstations 2 arranged next to one another, on each of which a spun yarn 3 is wound onto a cross-wound bobbin 4.
  • the coil 4 is for this purpose driven by a rubbing roller 5, while at the same time the yarn 3 is reciprocated by a yarn guide 6 over the stroke of the coil H back and forth, so that the yarn 3 is finally placed crosswise on the spool 4.
  • the friction rollers 5 are interconnected by a continuous shaft 7 and driven centrally at one end of the spinning machine 1 by a drive 8.
  • the yarn guide 6 all jobs 2 are interconnected by a machine-length traversing rod 9, which is also driven by a central drive 10.
  • the drive of the traversing rod 9 in this case includes a special Hubkurvengetriebe, which converts the rotational movement of the central drive 10, a reciprocating motion of the traversing rod 9. Since the bobbins 4 are always driven at their circumference at the same speed and, on the other hand, the traversing frequency F is constant over the entire winding cycle, the yarn 3 is wound in a wild winding, i. wound onto the bobbins 4 at a constant crosshair angle.
  • the turns ratio which is defined as the number of coil revolutions per double stroke DH, however, becomes smaller as the coil diameter increases.
  • a device 12 for avoiding image windings which varies the traversing frequency F within a certain deviation range A by a nominal frequency NF in order to prevent the occurrence of integer winding ratios.
  • the device 12 comprises a control device 14 with a random generator 11 which is connected to the drive 10 of the traversing rod 9 is connected and this controls accordingly.
  • a drive 10 of the yarn guide 6 is provided as an electronically controlled central drive, wherein the drive 10 for generating the double stroke DH drives a Hubkurvengetriebe.
  • the invention is equally applicable to an electronically controlled Einzelchang réelle per spinning station.
  • control device 14 with the drive 8 of the coil which is presently also designed as a central drive, connected in a control manner.
  • the speed of the winding drive 8 is detected by a speed sensor, not shown here, and forms the input of the control device 14 for the calculation of the nominal frequency NF of the traversing drive.
  • a speed sensor not shown here
  • it can be provided to also detect the speed of the traversing drive 8, as shown here by a dotted line.
  • a random setpoint value S which likewise forms an input variable of the control device 14, is output by the random number generator 11.
  • a disturbance pattern 13 is now generated therefrom by the control device 14 and the drive 10 of the thread guide is correspondingly acted upon until the next setpoint value S is predetermined by the random generator 11.
  • the drive 10 is in this case controlled such that a different traversing frequency F is set for each double stroke DH.
  • the device 12 according to the invention In contrast to the prior art, in which a predetermined disturbance cycle, which extends over a plurality of double strokes, is repeated continuously, the device 12 according to the invention now generates a random juxtaposition of individual disturbance patterns 13. As a result, even with large coil diameters, the occurrence of image windings can be avoided, while in the prior art the constant repetition of the same fault cycle could still cause image windings or mirroring. Since a different traversing frequency F is set for each double stroke DH in the image disturbance according to the invention, a very uniform coil structure without compression zones can be achieved.
  • Fig. 2 shows a first embodiment of the invention, in which a method for preventing image windings is shown, which further improves the image disturbance and enables a uniform coil structure.
  • a consecutive number of double strokes DH of the thread guide 6 and the traversing rod 9 symbolically represented over a certain period, while in the underlying area of the representation of the course of the traversing frequency F on the number of double strokes DH shown or is displayed over the corresponding period of time.
  • the magnitude of the traversing frequency F is given here as a percentage deviation from the nominal frequency NF, so that according to the present representation, the value zero corresponds exactly to the nominal frequency NF of the traversing frequency F.
  • the random generator 11 now selects to generate each individual interference pattern 13 a setpoint S, which is within a predetermined deviation range A to the nominal frequency NF.
  • the deviation range A is ⁇ 6% of the nominal frequency NF, which corresponds to the value zero.
  • the deviation range A can also be asymmetrical to the nominal frequency NF.
  • the predetermined by the random generator 11 setpoint S for the traversing frequency F is set by the controller 14 to the respective selected setpoint S and held for a while, then the next set by the random generator setpoint S2 is approached and held and so on. Because the successive setpoint values S1, S2, S3, etc.
  • a particularly advantageous embodiment of the invention is shown, according to which a change in the traversing frequency F in each case exclusively of a single stroke EH of the yarn guide 6 and the traversing rod 9 takes place.
  • a disturbance pattern 13 in this case extends over exactly one double stroke DH of the traversing rod 9, whereby the change of the traversing frequency F from the current actual value to the next nominal value S takes place exclusively within a single stroke EH of the thread guide 6.
  • the change of the traversing frequency F begins exactly at the beginning of a single stroke EH in the left end position LE and is completed before the yarn guide 6 reaches the other end position RE.
  • these advantages can also be achieved if a different traversing frequency F is already set for each individual stroke EH.
  • a disturbance pattern extends over exactly one individual stroke EH of the thread guide, the change of the traversing frequency F also preferably taking place exclusively outside the edge regions, ie outside the end positions LE and RE of the thread guide.
  • Fig. 3 shows an embodiment of the invention as in Fig. 2
  • the deviation range A compared to the Fig. 3 is lower.
  • a deviation range A of ⁇ 4% of the nominal frequency NF is shown.
  • the device 12 has for this purpose an operating unit 17. This also contributes to a quieter and more uniform coil construction.
  • the size of the deviation range A can thus be adjusted in an advantageous manner according to the operating parameters of the machine 1, for example in accordance with the delivery speed or also as a function of the yarn material to be wound.
  • the change of the traversing frequency F can be represented to a new setpoint S respectively by a display, which is symbolized in this case by corresponding asterisks.
  • the control device 14 comprises for this purpose a display device 17 (s. Fig. 1 ), for example, an LED, which is attached to the control device 14, and which indicates the change of the traversing frequency F in each case by a brief flashing.
  • the operator also receives visually visible information about the execution of the image disturbance.
  • the change in the traversing frequency F can be controlled by the control device 14 when at least one of the end positions LE and RE of the yarn guide 6 is monitored by at least one sensor 15 becomes.
  • Fig. 1 a display device 17
  • the change in the traversing frequency F can be controlled by the control device 14 when at least one of the end positions LE and RE of the yarn guide 6 is monitored by at least one sensor 15 becomes.
  • the sensor 15 can be arranged, for example, directly in the region of a yarn guide 6 or else in the region of the machine-length traversing rod 9. Likewise, however, the sensor may be provided directly in the region of the drive 10.
  • the sensor 15 also forms an input to the controller 14. In the absence of the sensor signal of the sensor 15, the change of the traversing frequency F is blocked by the controller 14, so that the vote of the change in the traversing frequency F to the area outside the edge laying areas of the coil 4 in favorable way is possible.
  • Fig. 4 shows an alternative embodiment of the invention, in which a disturbance pattern 13 extends over several double strokes DH.
  • the setpoint value S selected by the random generator 11 is hereby set in steps by the control device 14, wherein in each case one step is assigned to one double stroke DH.
  • the nominal frequency NF is initially set again in steps, and then the next setpoint value S2 is also approached in several stages, wherein once again a step is assigned to a double stroke DH.
  • the setpoint S selected in each case is set in uniform stages.
  • a different value of the traversing frequency F is assigned to each double stroke DH by the gradual approach of the desired value S.
  • each individual stroke EH assign a different value of the traversing frequency F and thus the setpoint S gradually, preferably approach in uniform stages.
  • a particularly uniform coil structure can be achieved in this case if, as also shown here, the rate of change of the traversing frequency F is the same at each stage.
  • the described embodiment of the invention is therefore preferably used at high delivery speeds from 150 meters per minute.
  • this particularly gentle method for avoiding image windings in yarns which have high curls or high elongation can be used very advantageously.
  • a change in the traversing frequency F occurs exclusively within a single stroke EH, which can be done advantageously by a sensor 15, which at least one of the end positions LE, RE Thread guide 6 and the traversing rod 9 detected.
  • a sensor 15 which at least one of the end positions LE, RE Thread guide 6 and the traversing rod 9 detected.
  • adjustment of the size of the deviation range A is possible in order to allow adaptation to different parameters.
  • a visual display In the present case, the optical display is carried out until the setpoint value predetermined by the control device 13 is reached over several stages, so that the LED lights up over a somewhat longer period of time.
  • the operating personnel can thus also use the optical display to identify the method according to which the image disturbance is carried out. The switching between the two modes can also be done via the control unit 17.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Winding Filamentary Materials (AREA)
EP12157914.8A 2011-03-10 2012-03-02 Procédé destiné à éviter les enroulements d'images Withdrawn EP2497733A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011005330A DE102011005330A1 (de) 2011-03-10 2011-03-10 Verfahren zur Vermeidung von Bildwicklungen

Publications (2)

Publication Number Publication Date
EP2497733A2 true EP2497733A2 (fr) 2012-09-12
EP2497733A3 EP2497733A3 (fr) 2013-08-21

Family

ID=45841237

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Application Number Title Priority Date Filing Date
EP12157914.8A Withdrawn EP2497733A3 (fr) 2011-03-10 2012-03-02 Procédé destiné à éviter les enroulements d'images

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Country Link
US (1) US20120261504A1 (fr)
EP (1) EP2497733A3 (fr)
CN (1) CN102674077A (fr)
DE (1) DE102011005330A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105926091B (zh) * 2016-06-01 2018-09-07 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 (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19548257A1 (de) 1995-12-22 1997-10-09 Schlafhorst & Co W Verfahren zur Vermeidung von Bildwicklungen beim Wickeln von Kreuzspulen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2855616A1 (de) * 1978-12-22 1980-06-26 Barmag Barmer Maschf Verfahren zum aufspulen von faeden
DE3825413A1 (de) * 1988-07-27 1990-02-01 Schlafhorst & Co W Verfahren zur fadenverlegung auf einer kreuzspule
DE4337891A1 (de) * 1993-11-05 1995-05-11 Zinser Textilmaschinen Gmbh Verfahren und Vorrichtung zum Aufspulen von Fäden
DE19916669A1 (de) * 1999-04-14 2000-11-02 Stahlecker Fritz Vorrichtung zum Aufspulen von Fäden auf Spulen mit wilder Kreuzwicklung
JP2004196459A (ja) * 2002-12-17 2004-07-15 Tmt Machinery Inc 糸条の巻取方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19548257A1 (de) 1995-12-22 1997-10-09 Schlafhorst & Co W Verfahren zur Vermeidung von Bildwicklungen beim Wickeln von Kreuzspulen

Also Published As

Publication number Publication date
DE102011005330A1 (de) 2012-09-13
EP2497733A3 (fr) 2013-08-21
US20120261504A1 (en) 2012-10-18
CN102674077A (zh) 2012-09-19

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