EP1709222A1 - Procede pour produire un file fantaisie - Google Patents

Procede pour produire un file fantaisie

Info

Publication number
EP1709222A1
EP1709222A1 EP04804368A EP04804368A EP1709222A1 EP 1709222 A1 EP1709222 A1 EP 1709222A1 EP 04804368 A EP04804368 A EP 04804368A EP 04804368 A EP04804368 A EP 04804368A EP 1709222 A1 EP1709222 A1 EP 1709222A1
Authority
EP
European Patent Office
Prior art keywords
yarn
effect
transverse dimension
spinning
fancy
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04804368A
Other languages
German (de)
English (en)
Other versions
EP1709222B1 (fr
Inventor
Hans Grecksch
Gerhard Rienas
Christoph Haase
Olav Birlem
Iris Biermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oerlikon Textile GmbH and Co KG
Original Assignee
Saurer GmbH and Co KG
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 GmbH and Co KG filed Critical Saurer GmbH and Co KG
Publication of EP1709222A1 publication Critical patent/EP1709222A1/fr
Application granted granted Critical
Publication of EP1709222B1 publication Critical patent/EP1709222B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/32—Counting, measuring, recording or registering devices
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/42—Control of driving or stopping
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/34—Yarns or threads having slubs, knops, spirals, loops, tufts, or other irregular or decorative effects, i.e. effect yarns

Definitions

  • the invention relates to a method for producing a fancy yarn according to the preamble of claim 1.
  • a fancy yarn is a yarn in which there are thick spots with predetermined larger diameters and with predetermined lengths, the so-called effects.
  • the intermediate yarn sections with a smaller diameter, that is, the non-effect sections, are referred to as webs.
  • the effect data determining a fancy yarn include, in particular, the effect lengths, effect diameter, the frequency of effects and the respective non-effect thread length or web length.
  • Fancy yarns are becoming increasingly important. Areas of application are, for example, denim fabrics, fabrics for casual wear and home textiles.
  • Effect yarns can also be produced on rotor spinning machines.
  • the fiber feed to the opening roller of the rotor spinning device is changed by varying the speed of the feed rollers.
  • mechanical gears are driven, which drive machine-long continuous shafts.
  • the feed rollers are set in rotation by means of these shafts. Due to the large mass of the moving parts of such a drive system and the gear play, however, an exact and abrupt change in the yarn thickness at the beginning and end of an effect is difficult or impossible to achieve.
  • the speed at Spinning fancy yarn may need to be greatly reduced compared to the speed of spinning fancy yarn.
  • the spinning machine described in DE 40 41 130 AI is used to produce fancy yarn using a program control for the effect formation.
  • Specifications such as the speed of the drive motors, speeds or certain machine parameters are provided and controlled.
  • the speed curve of the electric motor is specified as a setpoint curve for a specific flame or effect type of the fancy yarn to be produced.
  • the actual speed is monitored, for example, and registered in a control device.
  • Deviations from the desired design of the fancy yarn are not recognized in the spinning machine of DE 40 41 130 AI. This can lead to a reduction the quality of the fancy yarn or even the production of reject yarn.
  • the formation of the fancy yarn in rotor spinning does not only depend on the control of the feed roller, but is also influenced, for example, by the negative pressure in the spinning device or by the yarn twist. It can therefore easily happen that the various influencing variables are inadequately coordinated and the design of the fancy yarn produced deviates from the specified configuration of the fancy yarn to an undesirable extent.
  • a change in the spinning settings on the basis of a visual qualifying check of the yarn often leads to complex and very time-consuming coordination processes.
  • the method according to the invention controls the formation of the fancy yarn, which enables a comparison on the basis of quantified properties of the fancy yarn. A comparison can be made until there is sufficient agreement with the specified design of the fancy yarn. That is, according to the present invention, it is possible to do that in multiple cycles Check the result of each change in parameters and initiate a change again. In this way, a yarn can be produced which largely corresponds to the specified design of the fancy yarn.
  • the correspondence can be checked either by statistical recording, in particular tabular recording of the effects, that is to say their thickness, length and distribution, or else their display on a screen.
  • the display on a screen can, for example, be carried out using the Oasys® system from Zweigle.
  • a tabular specification in the form of a so-called effect table describes the repeat of the fancy yarn and is explained as an example. Rows with information on sections designed as a web and with information on sections of the fancy yarn designed as an effect alternate in the effect table in succession.
  • the first line of the effect table contains the specification of a web length and the web thickness.
  • the second line contains the specification of an effect length and an effect thickness. This is followed by another line with web length and web thickness etc.
  • the change can be made, for example, in the bridge length or the effect length.
  • the next yarn repeat after such a so-called “fault” is then a yarn repeat with an unchanged original first line.
  • the cycle is repeated with sporadically inserted "faults" until the specified length of yarn has been wound on the bobbin.
  • the effect formation which is determined on the basis of the evaluation of the measured diameter values, is compared with the effect formation, which is predetermined by the effect table.
  • the thicknesses and lengths of the effects and bars listed in the effect table form the TARGET values, the correspondence of which is checked with the measured ACTUAL values.
  • the continuous measurement of a transverse dimension such as the diameter of the fancy yarn, enables an assessment based on quantified properties, as a result of which the comparison can be carried out more quickly and in a more targeted manner than a merely qualifying visual assessment.
  • changes to the previous data are made.
  • the change in certain spinning parameters has certain effects on the yarn cross section. Some parameters can be changed automatically. In particular, this is possible when controlling the fiber feed to the opening roller by controlling the feed roller. If the feed roller temporarily rotates faster than the speed that is set for producing a web section, more becomes Fiber material per unit of time fed to form the thread. This creates a thicker thread section or an effect.
  • the effect thickness is at least approximately proportional to the speed of the feed roller.
  • the speed of the feed roller is increased accordingly. However, if the measured effect thickness is too large, the speed of the feed roller is reduced accordingly. If, for example, it is determined by evaluating the measured diameter values of the thread that the effect starts too late or the preceding web is too long and the length of the effect is therefore insufficient, the beginning of the phase in which the feed roller rotates faster and thus can promotes more fiber material to the opening roller, are accordingly placed at an earlier point in time. This extends the effect. If the effect ends too late and is therefore too long, the end of the phase in which the feed roller rotates faster and thus conveys more fiber material to the opening roller can be set earlier. In the event of deviations in the position, the diameter and the length of the webs, the same procedure is used for effects.
  • the person skilled in the art is also aware of other possibilities for changing spinning parameters which have an effect on the yarn cross section.
  • By changing the rotor speed the rotation of the thread and the thickness of the thread can be influenced. With a higher twist the thread is constricted more.
  • the setting of the negative pressure in the spinning device also has an effect on the effect formation and can be used as a manipulated variable for the Effects training can be used.
  • the choice of the speed of the opening roller and its design, in particular its clothing, or the selection of further spinning means such as, for example, the spinning rotor, offers further possibilities of influence.
  • the combing performance of the opening roller influencing the effect is determined both by the type of clothing and by the peripheral speed of the opening roller.
  • spinning settings which relate to the basic setting of the machine and which, unlike the directly effect-related data, do not fluctuate with a changing transverse dimension of the yarn.
  • the thickness of the yarn section can be changed by changing the twist factor.
  • the combing performance of the opening roller influencing the effect is determined both by the type of clothing and by the peripheral speed of the opening roller. If such spinning settings are included in the balancing process, the possibilities to quickly reach optimally selected or set spinning parameters are improved.
  • the data to be fed back to the rotor spinning machine are effective for various control devices. Accordingly, the data contain addresses of control devices for which they are intended. When downloading, this leads to the intended assignment of the data. This also includes data that are only displayed on a display of the central control device. This applies in particular to data that cannot be implemented by the machine itself.
  • the selection of spin agents is an example.
  • the change to achieve a sufficient correspondence between the specified effect formation and the effect formation of the yarn produced is advantageously carried out as a control process, which is supported by the use of control algorithms and empirically determined spinning settings in tabular form. Both control algorithms and empirically determined ones Spinning settings in table form serve to shorten the control process through targeted changes.
  • the thread produced is selected as the object of the monitoring.
  • the degree of agreement or deviation is determined by comparing the effect formation of the fancy yarn produced with the target effect formation specified for the yarn. Detected deviations from the target-effect formation are sufficiently minimized or completely eliminated for the further yarn production by means of the control process.
  • the control process is based on the actual effects training.
  • only compliance with the specifications for feeding fiber material is monitored, there are disadvantages. If the feeding of the fiber material, which is fed to the fancy yarn formation in the form of fiber tapes or rovings, is controlled without taking into account the actual effect formation, other disturbance variables and their effect on the effect formation of the fancy yarn produced are not recognized.
  • control process is based on the actual effects training. As a result, any deviation of the actual effect formation from the target effect formation occurring due to the influence of disturbance variables is recognizable. In this way, an effective control process can be carried out. If the feed speed changes when the fiber material is fed in or the draw-off speed of the fancy yarn produced, these become two
  • the speeds are matched to one another so that the effect image corresponds to the target effect training.
  • the method according to the invention is explained using a rotor spinning machine.
  • 1 is a schematic diagram of a spinning station
  • FIG. 2 shows the opening device of a spinning station in a simplified schematic representation in partial view
  • FIG. 3 shows a basic illustration of the control, in particular of feed rollers of a rotor spinning machine
  • Fig. 4 is a fancy yarn, which is represented by the series of measured values of the yarn diameter and
  • Fig. 5 shows the schematic representation of a yarn effect.
  • a single spinning station 1 is shown in side view from the large number of spinning stations of a rotor spinning machine.
  • a sliver 3 is drawn from a sliver can 2 through a so-called compressor 4 into the spin box 5 of the rotor spinning device.
  • the device arranged in the spinning box 5 for separating the fibers and feeding them into the spinning rotor 6 are known from the prior art and are therefore not explained in detail.
  • the drive of the spinning rotor 6 is indicated, which consists of a belt 7 running along the machine, with which all the rotors of the spinning stations installed on a long side of the spinning machine are driven. Alternatively, however, are also Individual drives of the rotors possible.
  • the belt 7 rests on the rotor shaft 8 of the spinning rotor 6.
  • the thread 9 is formed in the spinning rotor 6 and is drawn off through the thread draw-off tube 10 by means of the draw-off rollers 11.
  • the thread 9 then passes through a sensor 12, which is part of a so-called cleaner 13 for monitoring the quality of the thread 9.
  • the measured diameters are recorded in relation to the length of the thread.
  • a yarn defect is detected, for example, the rotation of the feed roller 27 shown in FIG. 2 is stopped, thereby causing the yarn to be interrupted.
  • the thread 9 is guided by a thread guide 14 in such a way that it is wound onto a package 15 in crosswise positions.
  • the cheese 15 is carried by a bobbin holder 16 which is pivotally mounted on the machine frame.
  • the cross-wound bobbin 15 lies with its circumference on the winding drum 17 and is driven by it so that the thread 9 is wound up in cross-layers in cooperation with the thread guide 14.
  • the directions of rotation of the cheese 15 and the winding drum 17 are indicated by arrows.
  • the sensor 12 is connected via the line 18 to a local control unit 20 of the spinning station.
  • the control unit 20 is connected via the line 21 to a central computer 22 of the rotor spinning machine.
  • the stepping motor 23 of the feed roller is connected to the control device 25 via the line 24.
  • Figure 2 shows details of the dissolution of the sliver 3 in individual fibers.
  • the sliver 3 drawn in by the compressor 4 is clamped between the clamping table 26 and the feed roller 27 and the rapidly rotating one Dissolving roller 28 submitted.
  • the feed roller 27 is connected to the stepper motor 23 via the drive connection 29. Stepper motor 23 can be controlled via line 24.
  • the direction of rotation of the opening roller 28 is indicated by the arrow 30.
  • the diameter of the yarn is measured.
  • the yarn mass could be determined, for example, using a capacitive sensor instead of an optical sensor.
  • the mass of a yarn section passing through the measuring range is measured, while a mean diameter value within the measuring range is determined in the optical measurement. Both measurements are equally suitable for evaluating the effect formation. In the present example, however, the invention is explained on the basis of the diameter determination.
  • the formation of the fancy yarn is input or read into a schematically illustrated input device 31 and this data is transmitted to a yarn design unit 32.
  • the transmission is indicated by arrow 33.
  • the yarn design unit 32 the data required for spinning on a rotor spinning machine is generated using a yarn design software.
  • These data include both the directly effect-related data, which fluctuate with the changing diameter of the yarn, and the basic settings of the rotor spinning machine relevant data. These include, for example, the rotor, draw-off roller and opening roller speeds, as well as the selection of the spin material. While the latter are preferably called up from a table, the speeds are to be determined by appropriate algorithms. These algorithms are based on known relationships.
  • the data generated in the yarn design unit 32 are transmitted via a bus system 34 to a central control device 35 of the rotor spinning machine.
  • the transmission can also be carried out using portable data carriers, such as a compact flash card.
  • the central control device 35 is connected to the central computer 22 via the data line 36.
  • the control device 25 comprises the control of, for example, 24 stepper motors 23 of the respective feed rollers 27 via lines 24. All 24 winding units are constructed in the same way.
  • a control card 40 is connected to the control device 25 by means of a connection device 39. The data required for the production of fancy yarn for controlling the stepper motors 23 are transmitted via a bus system 41
  • the control card 40 sets the data on the thickness and length of the effects and the to produce fancy yarn Change to match the other spinning settings in control data for the stepper motors 23 to generate the rotary movement of the feed rollers 27.
  • the data required for controlling the stepper motors of the feed rollers are transmitted to further control cards, not shown, which are connected to control devices of further sections of the rotor spinning machine.
  • control devices of further sections of the rotor spinning machine.
  • One of the other control devices is indicated by dashed lines.
  • the other control devices are constructed like the control device 25, have the same connection device and a connected control card.
  • Each additional control device controls the spinning positions of a section of the rotor spinning machine formed from 24 spinning positions.
  • the feed roller 27 transports more fiber material to the opening roller 28. This has the consequence that more fiber material gets into the rotor 6 per unit of time and the spun thread becomes thicker.
  • the length of the thick spot depends on the length of time for the increased fiber supply.
  • the diameter of the thick point is dependent on the speed of the stepping motor 23 or the feed roller 27.
  • the central computer 22 also controls the control device 25 via the line 43, with control commands specifying whether the control device 25 controls the production of fancy yarn or the production of fancy yarn.
  • the freshly spun yarn is measured by the sensor 12 and the measured values are transmitted to the yarn design unit 32, which is also provided with a display (not shown) in order to display the current fancy yarn or to quantify deviations from the specification. If the appearance or the statistical description of the freshly spun yarn does not correspond to the specified design of the fancy yarn, further changes must be made. These changes can consist both of the change in the effect parameters that are entered in the yarn design unit and the change of machine parameters that are usually to be entered on the central computer 22.
  • control connections 44 are provided on the central computer, which can lead, for example, to a control device 45 for the take-off rollers 11 or a control device 46 for the spinning rotors 6, the control devices 45 and 46 being formed, for example, by frequency converters.
  • a display 47 on the central computer also shows the selected spin agents, which, as already mentioned, have a not inconsiderable influence on the development of the effects.
  • Effects 48 and webs 49 are recognizable, but the beginning and end of effects 48 as well as the effect thickness or the effect diameter D E and the web thickness or the web diameter DS T / are not clearly and therefore not sufficiently recognizable.
  • the sensor 12 continuously eats the yarn diameter D and transmits the measurement data for evaluation via the central computer 22 to the yarn design unit 32.
  • the yarn diameter D is in each case after 2 mm of yarn length registered.
  • One cycle represents a measuring length of 2 mm yarn.
  • 5 shows the yarn diameter D in percent over the yarn length L G as curve 10.
  • 5 represents the web diameter D S ⁇ starting from the left up to point 51. From point 51, curve 50 increases and passes the value of the limit diameter D GR at point 52. At point 53, the predetermined yarn length L 1 has passed since point 52 was reached. After a diameter increase of 15% is registered at point 52 and the exceeding of the limit diameter D GR continues over the predetermined length L v ⁇ , for example six cycles or 12 mm long, point 52 is defined as the beginning of the effect.
  • the curve 50 falls below the limit diameter D GR at point 54.
  • the drop below continues until point 55 and thus over the predetermined length L v2 .
  • Point 54 is thus defined as the end of the effect.
  • the effect length L E is determined from the beginning and end of the effect between point 52 and point 54.
  • An arithmetic mean is formed from the four largest diameters 56 within the effect. As a result, the specification of the effect diameter is largely independent of natural diameter fluctuations in the effect area. This arithmetic mean is defined as the effect diameter D E.
  • the yarn cleaner 37 continuously determines whether the diameter values of the thread 9 detected by the sensor 12 originate from an area which is defined as a web 49 or as an effect 48.
  • the fluctuation range B s denotes the distance between the diameter of the effect 48 and the diameter of the web 49. If the diameter values of the thread 9 originate from a region which is defined as the web 49, these diameter values become the limit values assigned to the web diameter D s ⁇ Limit value RG S ⁇ o and limit value RG ST0 If the diameter values of the thread 9 originate from a region which is defined as effect 48, these diameter values are compared with the limit values assigned to the effect diameter D E , the limit value RG E o and the limit value RG E ⁇ .
  • the limit values are selected in such a way that exceeding them means an intolerable deviation.
  • An intolerable deviation triggers a change in the spinning parameters. For example, if an effect does not have the correct dimension because the thickness of this effect is too small, the fiber feed for the phase in which this effect is formed is increased by increasing the speed of the feed roller and in this way the deviation from the specified one Effect thickness reduced or eliminated.
  • the yarn cleaner 37 can be set up in such a way that either only deviations in land areas or only deviations in effect areas are taken into account.
  • the web length and the effect length can also be compared with predetermined lengths without exceeding the diameter limit values, and with the aid of length limit values it can be decided whether there are intolerable deviations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

L'invention concerne un procédé qui améliore la conformité du filé fantaisie produit avec le motif prédéfini du filé fantaisie. Selon le procédé de l'invention, le filé fantaisie est conduit, après sa formation dans un métier à filer, à travers un dispositif de capteur et le diamètre du filé fantaisie est mesuré en continu au moyen du dispositif de capteur. Le motif fantaisie du filé produit est déterminé à partir des valeurs de mesure du diamètre et est comparé au motif fantaisie prédéfini. L'ajustement est exécuté jusqu'à ce qu'une conformité suffisante entre le motif fantaisie prédéfini et le motif fantaisie du filé produit optimisé soit atteinte.
EP04804368A 2004-01-21 2004-12-29 Procede pour produire un file fantaisie Active EP1709222B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004003032A DE102004003032A1 (de) 2004-01-21 2004-01-21 Verfahren zum Herstellen eines Effektgarnes
PCT/EP2004/014782 WO2005071150A1 (fr) 2004-01-21 2004-12-29 Procede pour produire un file fantaisie

Publications (2)

Publication Number Publication Date
EP1709222A1 true EP1709222A1 (fr) 2006-10-11
EP1709222B1 EP1709222B1 (fr) 2012-05-23

Family

ID=34744947

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04804368A Active EP1709222B1 (fr) 2004-01-21 2004-12-29 Procede pour produire un file fantaisie

Country Status (5)

Country Link
US (1) US7721519B2 (fr)
EP (1) EP1709222B1 (fr)
CN (1) CN1906341B (fr)
DE (1) DE102004003032A1 (fr)
WO (1) WO2005071150A1 (fr)

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Publication number Priority date Publication date Assignee Title
CZ300469B6 (cs) * 2004-02-16 2009-05-27 Oerlikon Czech S.R.O. Zpusob podávání pramene pri výrobe efektní príze a sprádací jednotka k jeho provádení
EP2270494B1 (fr) 2005-11-18 2013-04-24 Uster Technologies AG Procédé pour caractériser des fils d'effet
US10246292B2 (en) * 2013-10-01 2019-04-02 Maschinenfabrik Rieter Ag Yarn clearer and spinning station, equipped therewith, of a spinning machine, and method for operating a spinning station
DE102014119380A1 (de) * 2014-12-22 2016-06-23 Rieter Ingolstadt Gmbh Rotorspinnmaschine mit einer Vielzahl von Arbeitsstellen und einer Absaugeinrichtung
DE102017112080A1 (de) * 2016-06-15 2017-12-21 Rieter Ingolstadt Gmbh Verfahren zum Optimieren der Produktion einer Rotorspinnmaschine

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CN85108085B (zh) * 1985-10-19 1988-04-27 如皋染织厂 花式纱线及纺捻方法和设备
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IT1304528B1 (it) * 1998-01-02 2001-03-19 Massimo Brunamonti Metodo e dispositivo per la rilevazione di difetti di filati in fasedi produzione in particolare filati di ciniglia.
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Also Published As

Publication number Publication date
CN1906341A (zh) 2007-01-31
EP1709222B1 (fr) 2012-05-23
WO2005071150A1 (fr) 2005-08-04
US7721519B2 (en) 2010-05-25
US20080243288A1 (en) 2008-10-02
DE102004003032A1 (de) 2005-08-11
CN1906341B (zh) 2010-07-07

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