EP0291710B1 - Method and apparatus for controlling pieced yarn in an open-end spinning unit - Google Patents

Method and apparatus for controlling pieced yarn in an open-end spinning unit Download PDF

Info

Publication number
EP0291710B1
EP0291710B1 EP88106282A EP88106282A EP0291710B1 EP 0291710 B1 EP0291710 B1 EP 0291710B1 EP 88106282 A EP88106282 A EP 88106282A EP 88106282 A EP88106282 A EP 88106282A EP 0291710 B1 EP0291710 B1 EP 0291710B1
Authority
EP
European Patent Office
Prior art keywords
thread
fibres
joining
collector
joiner
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
Application number
EP88106282A
Other languages
German (de)
French (fr)
Other versions
EP0291710A1 (en
Inventor
Hans Raasch
Helmut Schlösser
Joachim Dr.-Ing. Rüge
Heinz-Dieter Goebbels
Manfred Lassmann
Norbert Schippers
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
W Schlafhorst AG and Co
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 W Schlafhorst AG and Co filed Critical W Schlafhorst AG and Co
Publication of EP0291710A1 publication Critical patent/EP0291710A1/en
Application granted granted Critical
Publication of EP0291710B1 publication Critical patent/EP0291710B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • D01H4/48—Piecing arrangements; Control therefor
    • D01H4/50—Piecing arrangements; Control therefor for rotor spinning

Definitions

  • the invention relates to a method and a device for monitoring the piecer in a sliver drawing-in device, a disintegration device, a fiber guiding device, a fiber collecting, arranging and imparting a rotational movement to them, then applying them to the open thread end and a pulling device pulling the thread out of the fiber collector having an OE spinning unit, in which the returned thread end for forming the piecer is applied to an amount of piecing fiber fed into the fiber collector, whereupon the thread is continuously withdrawn from the fiber collector and fibers are continuously fed into the fiber collector.
  • the type of fiber collector is of secondary importance for the application of the invention. As is known, there are differently designed fiber collectors and the manner in which a fiber collector gives the fibers a rotational movement is correspondingly different. If, for example, the fiber collector is designed as a rotor and the rotor has a fiber collecting groove, the fibers lie lengthwise in the fiber collecting groove and circle around the axis of rotation of the fiber collector. In other fiber collectors, for example, the fibers are given a rotational movement about their longitudinal axis.
  • the object of the invention is to obtain data by monitoring the piecer and to make this data available for quality assurance of the piecer.
  • this object is achieved in that the diameter values in relation to the longitudinal axis of the thread are automatically measured, electronically stored and compared with comparison values on the piecer and the thread sections located in front of and behind the piecer, each having at least approximately the length of the piecer, and that From this comparison, targeted intervention options for the improvement of future piecers, in particular for the improvement of the piecer profile, can be derived.
  • length-related diameter values are obtained, from which, for example, the piecing profile, including the yarn path located before and after the piecer, results.
  • the diameter can be recorded, for example, per millimeter of thread length.
  • the length-related diameter values are stored electronically, for example in digital form, and compared with comparison values, so that intervention options for improving future piecers can be determined directly from this comparison.
  • the comparison result is used for the electronic control of an automatically operating piecing device.
  • the primary idea here is a mobile or positionable piecing device that operates the individual spinning positions or OE spinning units in succession. This piecing device can work according to a predetermined program, but is adaptable according to the invention.
  • the comparison result is advantageous for the dimensioning of a previously fed into the fiber collector
  • the amount of piecing fibers used is particularly interesting for OE rotor spinning devices. Pre-feeding a certain amount of fiber before the actual threading is of crucial importance for the quality of the piecer.
  • the determination of the pre-feed amount of the fibers is also particularly critical, while the times at which the ongoing fiber feed begins and the thread take-off begins are easier to determine and less critical.
  • mean values are formed from the length-related diameter values obtained on the occasion of the piecing processes carried out continuously, and the comparison values are derived or formed from these mean values. Certain limits can be placed on the averaging. For example, one can limit the number of measurements to be used for averaging. In addition, it can be predetermined whether the mean values should be obtained from continuous measurements or whether only every second, tenth or nth piecing production is to be used for averaging. A more precise approach to the ideal comparison value of the respective spinning section is expected.
  • a piecing device on an OE spinning machine for forming a piecer in a sliver drawing-in device, a disintegration device, a fiber guiding device, a fiber collector that collects, arranges and gives them a rotational movement, then places them on the open thread end and one fiber collector OE spinning unit having a pulling device pulling the fiber collector, in which the returned end of the thread for forming the piecer is applied to an amount of piecing fiber fed into the thread collector, whereupon the thread is continuously withdrawn from the fiber collector and fibers are continuously fed into the fiber collector.
  • the device for deriving intervention options for improving the piecing profile of future piecers has a controllable piecing fiber quantity dosing device.
  • the dosing of the piecing fiber amounts can be done completely automatically.
  • the dosing of the piecing fiber quantity can also be carried out independently of other intervention options to improve the piecing profile of future piecers.
  • the piecing program can also be changed from time to time, for example, by hand with regard to the time of individual sub-processes of the entire piecing process. An automatic change of this type is also conceivable.
  • the piecing-fiber quantity metering device has a releasable operative connection to the sliver drawing-in device of the OE spinning unit, to the output of which at least one comparator which responds to thread signals which deviate from comparison values is connected.
  • the comparator is set up to take over the mean values of the measured length-related diameter values formed in the mean value images as comparison values.
  • a setpoint generator can be arranged as an intermediate link between the mean value images and the comparator, which can be set to manual or automatic operation, for example, as desired.
  • the piecing fiber quantity dosing device is connected to a correction quantity adjuster.
  • This correction amount adjuster can be set manually or automatically.
  • the size of the allowable amount of correction can, for example, be made automatically dependent on how many piecers were produced in a certain past time period.
  • An OE spinning machine has a plurality of OE spinning units 1, each with a sliver drawing-in device 2, a dissolving device 3, a fiber guiding device 4, a fiber collector 5 and a take-off device 6.
  • the sliver feed device 2 consists of a feed roller driven by an electric motor. A switch 7 is connected upstream of the electric motor. The sliver 8 passes through a feed table 9 under the feed roller to the opening device 3.
  • the opening device 3 consists of a rotating, toothed roller.
  • the fiber guiding device 4 is designed as a fiber channel that extends from the housing 10 of the opening device 3 to the fiber collector 5.
  • the fiber collector 5 is designed as a rotor which sits on a shaft 11. The fibers 12 separated by the dissolving device 3 first reach the conical jacket-shaped sliding surface 13 and from there into the fiber collecting groove 14 of the rotating fiber collector 5.
  • the fiber collector 5 brings the fibers lying in the fiber collecting groove 14 into a rotational movement. They rotate by lying lengthwise in the fiber collecting groove 14 about the common axis of rotation of the shaft 11 and the fiber collector 5.
  • the trigger device 6 consists of a pair of rollers.
  • the thread 17 follows the broken line 17 '. It is continuously wound on a cheese, not shown here.
  • the take-off device 6 can be switched from forward gear to reverse gear for the purpose of piecing and returning the thread into the fiber collector 5.
  • a mobile piecing device 20 is assigned to the OE spinning machine.
  • the piecing device 20 moves from the spinning unit to the spinning unit and is able to automatically carry out the re-piecing after thread break or the first piecing.
  • the piecing device 20 remains in front of the spinning unit in question stand and then carry out the individual tasks required for piecing according to the program, for example controlled by adjustable or controllable time relays.
  • the drawing shows in a schematic representation only the parts of the piecing device 20 which are important for understanding the invention.
  • An amplifier 25 is connected to a device 21 for automatically measuring the diameter values in association with the longitudinal axis of the piecer 22 and the thread sections 23 and 24 located in front of and behind the piecer 22 and each having at least the length of the piecer 22 for electronically storing the measured, length-related diameter values.
  • a line 27 leads from the device 26 to a mean value image 29 and a line 28 to a comparator 30.
  • the comparator 30 compares the measured, length-related diameter values with comparison values which are given to it by a setpoint generator 31.
  • the setpoint generator 31 is connected to the mean value image 29 so that it can adopt the mean values formed there as setpoints.
  • the device 21 is a thread signal pickup, which in this case is arranged in such a way that it can observe and measure both the piecer 22 and the thread sections 23 and 24 located in front of and behind the piecer at the same time.
  • the storage device 26 stores those measured values which result at the time when the piecer 22 is in the middle between two thread guides 32 and 33 and thus also in the middle of the Thread signal pickup 21 is located.
  • the storage device 26 transmits its content to the mean value image 29 for the purpose of forming an average value from measurements already carried out and to the comparator 30 for forming a comparison value.
  • the comparative value determined by the comparator 30 is sent via line 34 to a device 35 for deriving intervention options for improving the piecing profile of future piecers.
  • the device 35 contains, as piecing fiber quantity metering device 36, a computer which is preceded by a memory 37 which is connected to the comparator 30 by the line 34.
  • a signal converter 38 connects to the computer 36.
  • the signal converter 38 can optionally output analog or digital control signals as correction signals for the fiber ribbon feed device 2.
  • a line 39 leads from the signal converter 38 to an electromagnetic drive 40, which can establish a releasable operative connection to the switch 7 of the sliver drawing-in device 2.
  • the operative connection comes about in that the electromagnetic drive 40 extends a plunger 41, which acts mechanically on a switching lever 42 of the switch 7 with the aim of turning the switch 7 on or off again after the plunger 41 has been withdrawn.
  • the switch 7 can also be switched on and off electromagnetically from the OE spinning unit 1 in a manner not shown here.
  • the piecing device 20 is active in front of the OE spinning unit 1, it takes over the switching of the switch 7.
  • the thread guides 32 and 33 of the piecing device 20 fetch the thread 17 from its normal running position 17 'until the device 21, with its Measurements begin so early that when the thread is running, it can also detect the piecer 22 and the thread sections 23 and 24 located in front of and behind the piecer at the right time.
  • the amplified thread signals stored in the device 26 are compared in the comparator 30 with comparison values, and the comparison result passes via the line 34 to the device 35, where it is stored in the memory 37 for producing a future piecer.
  • the previous comparison result is also stored in the memory 37, so that the computer 36 can compare the two comparison results with one another in order to determine whether the piecer 22 currently present corresponds to the quality standard or not.
  • the computer 36 causes the signal converter 38 and the electromagnetic drive 40 to open the switch 7 and thereby prevent further feeding of the fiber sliver 8, causing a thread breakage, with the result that the piecing process is still must be repeated once.
  • the drawing shows that the piecer 22 has not met the quality standard and that the switch 7 is already switched off.
  • the sliver feed device 2 also runs when the piecer is of good quality Operating speed.
  • the two thread guides 32 and 33 then move to the left to bring the thread 17 into its normal running position 17 '. Then they release the thread 17.
  • the piecing device 20 can continue to a new work location. At the new place of work, the piecing device 20 then takes over the switching of the switch 7 located there in accordance with the comparison result of the previous piecer measurement on the OE spinning unit 1, which is stored in the memory 37 -Dosing device 36 determined duty cycle for entering a certain amount of piecing fibers in the fiber collector 5 temporarily switched on.
  • the maximum possible duty cycle has been set on a correction quantity adjuster 44.
  • the take-off device 6 is then started and the thread 17 continuously drawn in the direction of the arrow 19.
  • the switch 7 is also switched on again. If the piecer 22 does not meet the quality requirements, the switch 7 is switched off again, otherwise it remains switched on.
  • the computer 36 also has a few outputs 43 to which, for example, display devices, registration devices, notification devices or, in general, other devices for deriving intervention options for improving the piecing profile of future piecers can be connected.
  • the piecing profile can also be controlled by Pulling device 6, the sliver feed device 2 and / or the opening device 3 and / or the speed of the shaft 11 are influenced.
  • the device 21 can be designed differently. For example, it can be set up in such a way that it detects the diameter or profile of the thread or piecer optoelectrically over a certain short thread path and processes this thread signal, for example, into a curve.
  • the thread signal can also be detected capacitively or in any other known manner. Regardless of the type of detection of the thread signals, there is finally a more or less accurate electronic image of the piecing device and its adjacent thread sections in the device 26.

Description

Verfahren und Vorrichtung zum Überwachen der Anspinner in einem OE-SpinnaggregatMethod and device for monitoring the piecer in an OE spinning unit

Die Erfindung betrifft Verfahren und Vorrichtung zum Überwachen der Anspinner in einem eine Faserbandeinzugsvorrichtung, eine Auflösevorrichtung, eine Faserleitvorrichtung, einen die Fasern sammelnden, ordnenden und ihnen eine Drehbewegung erteilenden, sie danach an das offene Fadenende anlegenden Fasersammler und eine den Faden aus dem Fasersammler abziehende Abzugsvorrichtung aufweisenden OE-Spinnaggregat, bei dem das rückgeführte Fadenende zum Bilden des Anspinners an eine in den Fasersammler eingespeiste Anspinn-Fasermenge angelegt wird, worauf der Faden laufend aus dem Fasersammler abgezogen wird und laufend Fasern in den Fasersammler eingespeist werden.The invention relates to a method and a device for monitoring the piecer in a sliver drawing-in device, a disintegration device, a fiber guiding device, a fiber collecting, arranging and imparting a rotational movement to them, then applying them to the open thread end and a pulling device pulling the thread out of the fiber collector having an OE spinning unit, in which the returned thread end for forming the piecer is applied to an amount of piecing fiber fed into the fiber collector, whereupon the thread is continuously withdrawn from the fiber collector and fibers are continuously fed into the fiber collector.

Die Art des Fasersammlers ist für Anwendung der Erfindung von nebengeordneter Bedeutung. Bekanntlich gibt es unterschiedlich ausgebildete Fasersammler und entsprechend unterschiedlich ist auch die Art und Weise, wie ein Fasersammler den Fasern eine Drehbewegung erteilt. Ist der Fasersammler beispielsweise als Rotor ausgebildet und besitzt der Rotor eine Fasersammelrille, so legen sich die Fasern der Länge nach in die Fasersammelrille und kreisen um die Drehachse des Fasersammlers. Bei anderen Fasersammlern wird den Fasern beispielsweise eine Drehbewegung um ihre Längsachse erteilt.The type of fiber collector is of secondary importance for the application of the invention. As is known, there are differently designed fiber collectors and the manner in which a fiber collector gives the fibers a rotational movement is correspondingly different. If, for example, the fiber collector is designed as a rotor and the rotor has a fiber collecting groove, the fibers lie lengthwise in the fiber collecting groove and circle around the axis of rotation of the fiber collector. In other fiber collectors, for example, the fibers are given a rotational movement about their longitudinal axis.

Insbesondere bei OE-Rotorspinnmaschinen ist es von Bedeutung für die Qualität des Anspinners, mit welcher Umfangsgeschwindigkeit der Fasersammler gerade rotiert in dem Augenblick, in dem das rückgeführte Fadenende die im Fasersammler vorhandene Anspinn-Fasermenge berührt, wie groß die Anspinn-Fasermenge in diesem Augenblick gerade ist, wie rasch der Faden daraufhin aus der Rückführbewegung in die Abzugsbewegung gebracht werden kann und mit welcher Abzugsgeschwindigkeit der Faden dann abgezogen wird.In the case of OE rotor spinning machines in particular, it is important for the quality of the piecer, at what circumferential speed the fiber collector is rotating at the moment when the returned thread end is in the Fiber collector existing piecing fiber quantity touches how large the piecing fiber quantity is at this moment, how quickly the thread can then be brought from the return movement into the draw-off movement and at what withdrawal speed the thread is then drawn off.

Beim automatischen Anspinnen wird nach einem Anspinn-Programm verfahren, und es ist schwierig, von vornherein eine gute Qualität des Anspinners zu erreichen.Automatic piecing uses a piecing program and it is difficult to achieve good piecing quality from the start.

Will man beim Anspinnen die richtigen Einflußgrößen um den richtigen Betrag verändern, um schließlich zu qualitativ guten Anspinnern zu gelangen, ist es eine Grundvoraussetzung, die Anspinner zu überwachen. Zum Stand der Technik wird auf die DE-A 35 30 905, DE-A-3 440 009 und auf die DE-A 27 25 105 hingewiesen.If you want to change the right influencing factors by the right amount when piecing, in order to finally achieve good piecers, it is a basic requirement to monitor the piecers. With regard to the prior art, reference is made to DE-A 35 30 905, DE-A-3 440 009 and DE-A 27 25 105.

Der Erfindung liegt die Aufgabe zugrunde, durch Überwachung der Anspinner Daten zu gewinnen und diese Daten zur Qualitätssicherung der Anspinner zur Verfügung zu stellen.The object of the invention is to obtain data by monitoring the piecer and to make this data available for quality assurance of the piecer.

Gemäß der Erfindung wird diese Aufgabe dadurch gelöst, daß an dem Anspinner und den vor und hinter dem Anspinner gelegenen, jeweils mindestens etwa die Länge des Anspinners aufweisenden Fadenstrecken automatisch die Durchmesserwerte in Zuordnung zur Fadenlängsachse gemessen, elektronisch gespeichert und mit Vergleichswerten verglichen werden, und daß aus diesem Vergleich gezielt Eingriffsmöglichkeiten zur Verbesserung künftiger Anspinner, insbesondere zur Verbesserung des Anspinnerprofils, abgeleitet werden.According to the invention, this object is achieved in that the diameter values in relation to the longitudinal axis of the thread are automatically measured, electronically stored and compared with comparison values on the piecer and the thread sections located in front of and behind the piecer, each having at least approximately the length of the piecer, and that From this comparison, targeted intervention options for the improvement of future piecers, in particular for the improvement of the piecer profile, can be derived.

Es werden demgemäß längenbezogene Durchmesserwerte gewonnen, aus denen sich beispielsweise das Anspinnerprofil einschließlich der vor und nach dem Anspinner gelegenen Fadenstrecke ergibt. Die Durchmessererfassung kann beispielsweise pro Millimeter Fadenlänge vorgenommen werden. Bei kleineren Längen ergibt sich ein genaueres, bei größeren Fadenlängen beziehungsweise größeren Abständen der Durchmessererfassung ein gröberes Abbild des Anspinnerprofils beziehungsweise Fadenprofils.Accordingly, length-related diameter values are obtained, from which, for example, the piecing profile, including the yarn path located before and after the piecer, results. The diameter can be recorded, for example, per millimeter of thread length. With shorter lengths there is a more precise picture of the piecing profile or thread profile with larger thread lengths or larger distances of the diameter detection.

Die längenbezogenen Durchmesserwerte werden elektronisch gespeichert, beispielsweise in digitaler Form, und mit Vergleichswerten verglichen, so daß sich unmittelbar aus diesem Vergleich gezielt Eingriffsmöglichkeiten zur Verbesserung künftiger Anspinner ermitteln lassen.The length-related diameter values are stored electronically, for example in digital form, and compared with comparison values, so that intervention options for improving future piecers can be determined directly from this comparison.

Es bedarf einiger Erfahrung, für jede Garnart und jedes Fasermaterial das günstigste Anspinnerprofil herauszufinden und dann zum Maßstab zu nehmen. Weiterbildungen der Erfindung leisten auch hierzu ihren Beitrag.It takes some experience to find out the cheapest piecing profile for each yarn type and each fiber material and then to use it as a benchmark. Further developments of the invention also make their contribution here.

In Weiterbildung der Erfindung wird das Vergleichsergebnis zur elektronischen Steuerung einer automatisch arbeitenden Anspinnvorrichtung herangezogen. Hierbei ist in erster Linie an eine fahrbare beziehungsweise ortsveränderbare, die einzelnen Spinnstellen beziehungsweise OE-Spinnaggregate nacheinander bedienende Anspinnvorrichtung gedacht. Diese Anspinnvorrichtung kann nach einem vorgegebenen Programm arbeiten, das aber gemäß der Erfindung anpassungsfähig ist.In a further development of the invention, the comparison result is used for the electronic control of an automatically operating piecing device. The primary idea here is a mobile or positionable piecing device that operates the individual spinning positions or OE spinning units in succession. This piecing device can work according to a predetermined program, but is adaptable according to the invention.

Vorteilhaft wird das Vergleichsergebnis zur Bemessung einer zuvor in den Fasersammler eingespeisten Anspinn-Fasermenge herangezogen. Diese Weiterbildung der Erfindung ist insbesondere für OE-Rotor-Spinnvorrichtungen interessant. Die Voreinspeisung einer bestimmten Fasermenge vor dem eigentlichen Fadenansetzen ist für die Qualität des Anspinners von ausschlaggebender Bedeutung. Die Bestimmung der Voreinspeisemenge der Fasern ist auch besonders kritisch, während die Zeitpunkte, in denen die laufende Fasereinspeisung beginnt und der Fadenabzug einsetzt, leichter zu bestimmen und weniger kritisch sind.The comparison result is advantageous for the dimensioning of a previously fed into the fiber collector The amount of piecing fibers used. This development of the invention is particularly interesting for OE rotor spinning devices. Pre-feeding a certain amount of fiber before the actual threading is of crucial importance for the quality of the piecer. The determination of the pre-feed amount of the fibers is also particularly critical, while the times at which the ongoing fiber feed begins and the thread take-off begins are easier to determine and less critical.

Bei der Bemessung einer zuvor in den Fasersammler eingespeisten Anspinn-Fasermenge können sich aufgrund der Messungen erhebliche Mengenänderungen beim Herstellen des nächstfolgenden Anspinners ergeben. Dies kann zu abrupten, meßbaren und sichtbaren Anspinneränderungen führen, die unerwünscht sind. Daher ist in Weiterbildung der Erfindung vorgesehen, daß bei jeder Änderung der Anspinn-Fasermenge eine vorgegebene Korrektur-Fasermenge innerhalb Toleranzgrenzen weder überschritten noch unterschritten wird. Von Mal zu Mal kann die Änderung des Anspinners nun in vorwählbaren kleinen Schritten erfolgen. Aus der Messung resultierende Zufälligkeiten werden dadurch kompensiert.When dimensioning a piecing fiber quantity previously fed into the fiber collector, the measurements can result in considerable quantity changes when producing the next piecer. This can lead to abrupt, measurable and visible piecing changes that are undesirable. It is therefore provided in a development of the invention that with each change in the piecing fiber quantity, a predetermined correction fiber quantity is neither exceeded nor undershot within tolerance limits. From time to time the piecing can now be changed in pre-selectable small steps. This compensates for the randomness resulting from the measurement.

In Weiterbildung der Erfindung werden aus den anläßlich fortlaufend durchgeführter Anspinnvorgänge gewonnenen längenbezogenen Durchmesserwerten Mittelwerte gebildet und aus diesen Mittelwerten die Vergleichswerte abgeleitet beziehungsweise gebildet. Dabei können der Mittelwertbildung bestimmte Grenzen gesetzt werden. Man kann beispielsweise die Anzahl der zur Mittelwertbildung heranzuziehenden Messungen begrenzen. Außerdem kann vorbestimmt werden, ob die Mittelwerte aus fortlaufenden Messungen gewonnen werden sollen oder ob nur jede zweite, zehnte beziehungsweise n-te Anspinnerherstellung zur Mittelwertbildung herangezogen werden soll. Erwartet wird hierbei ein genaueres Herantasten an den idealen Vergleichswert der jeweiligen Spinnpartie.In a further development of the invention, mean values are formed from the length-related diameter values obtained on the occasion of the piecing processes carried out continuously, and the comparison values are derived or formed from these mean values. Certain limits can be placed on the averaging. For example, one can limit the number of measurements to be used for averaging. In addition, it can be predetermined whether the mean values should be obtained from continuous measurements or whether only every second, tenth or nth piecing production is to be used for averaging. A more precise approach to the ideal comparison value of the respective spinning section is expected.

In Weiterbildung der Erfindung ist eine Anspinnvorrichtung an einer OE-Spinnmaschine zum Bilden eines Anspinners in einem eine Faserbandeinzugsvorrichtung, eine Auflösevorrichtung, eine Faserleitvorrichtung, einen die Fasern sammelnden, ordnenden und ihnen eine Drehbewegung erteilenden, sie danach an das offene Fadenende anlegenden Fasersammler und eine den Faden aus dem Fasersammler abziehende Abzugsvorrichtung aufweisenden OE-Spinnaggregat, bei dem das rückgeführte Fadenende zum Bilden des Anspinners an eine in den Fadensammler eingespeiste Anspinn-Fasermenge angelegt wird, worauf der Faden fortlaufend aus dem Fasersammler abgezogen wird und laufend Fasern in den Fasersammler eingespeist werden, zum Durchführen des Verfahrens gekennzeichnet durch eine Einrichtung zum automatischen Messen der Durchmesserwerte in Zuordnung zur Fadenlängsachse des Anspinners und der vor und hinter dem Anspinner gelegenen, jeweils mindestens die Länge des Anspinners aufweisenden Fadenstrecken, außerdem gekennzeichnet durch eine Einrichtung zum elektronischen Speichern der gemessenen, längenbezogenen Durchmesserwerte, durch eine Einrichtung zum Vergleichen der gemessenen, längenbezogenen Durchmesserwerte mit Vergleichswerten und außerdem gekennzeichnet durch eine Einrichtung zum Ableiten von Eingriffsmöglichkeiten zur Verbesserung des Anspinnerprofils künftiger Anspinner.In a further development of the invention is a piecing device on an OE spinning machine for forming a piecer in a sliver drawing-in device, a disintegration device, a fiber guiding device, a fiber collector that collects, arranges and gives them a rotational movement, then places them on the open thread end and one fiber collector OE spinning unit having a pulling device pulling the fiber collector, in which the returned end of the thread for forming the piecer is applied to an amount of piecing fiber fed into the thread collector, whereupon the thread is continuously withdrawn from the fiber collector and fibers are continuously fed into the fiber collector. for carrying out the method, characterized by a device for automatically measuring the diameter values in association with the longitudinal axis of the piecer and the thread sections located in front of and behind the piecer, each having at least the length of the piecer, except furthermore characterized by a device for electronically storing the measured, length-related diameter values, by a device for comparing the measured, length-related diameter values with comparison values and also characterized by a device for deriving intervention options for improving the piecing profile of future piecers.

Alle diese erfindungsgemäßen Einrichtungen brauchen nur einmal vorhanden zu sein, wenn die OE-Spinnmaschine lediglich eine fahrbare beziehungsweise ortsveränderbare Anspinnvorrichtung besitzt.All of these devices according to the invention only need to be present once if the OE spinning machine only has a mobile or relocatable piecing device.

In Weiterbildung der Erfindung besitzt die Einrichtung zum Ableiten von Eingriffsmöglichkeiten zur Verbesserung des Anspinnerprofils künftiger Anspinner eine steuerbare Anspinnfasermengen-Dosiervorrichtung.In a further development of the invention, the device for deriving intervention options for improving the piecing profile of future piecers has a controllable piecing fiber quantity dosing device.

Die Dosierung der Anspinnfasermengen kann völlig automatisch geschehen. Die Dosierung der Anspinnfasermenge kann außerdem unabhängig von sonstigen Eingriffsmöglichkeiten zur Verbesserung des Anspinnerprofils künftiger Anspinner durchgeführt werden. Aufgrund angezeigter Vergleichswerte kann beispielsweise von Zeit zu Zeit auch von Hand das Anspinn-Programm hinsichtlich des Zeitpunktes einzelner Teilvorgänge des gesamten Anspinnvorgangs verändert werden. Auch eine automatische derartige Veränderung ist denkbar.The dosing of the piecing fiber amounts can be done completely automatically. The dosing of the piecing fiber quantity can also be carried out independently of other intervention options to improve the piecing profile of future piecers. Based on the displayed comparison values, the piecing program can also be changed from time to time, for example, by hand with regard to the time of individual sub-processes of the entire piecing process. An automatic change of this type is also conceivable.

In Weiterbildung der Erfindung besitzt die Anspinnfasermengen-Dosiervorrichtung eine lösbare Wirkverbindung zu der Faserbandeinzugsvorrichtung des OE-Spinnaggregats, an dessen Ausgang mindestens ein auf von Vergleichswerten abweichende Fadensignale ansprechender Komparator angeschlossen ist.In a further development of the invention, the piecing-fiber quantity metering device has a releasable operative connection to the sliver drawing-in device of the OE spinning unit, to the output of which at least one comparator which responds to thread signals which deviate from comparison values is connected.

Auch dann, wenn der Fadensignalaufnehmer bereits eine längere Strecke vor dem Anspinner zu arbeiten beginnt und es eine längere Strecke hinter dem Anspinner seine Tätigkeit wieder einstellt, so kann aus seinen Fadensignalen doch die begrenzte Strecke herausgefiltert werden, die verhältnismäßig kurz vor dem Anspinner beginnt und verhältnismäßig kurz hinter dem Anspinner endet.Even if the thread signal pick-up already starts to work a longer distance in front of the piecer and it stops operating a longer distance behind the piecer, the limited distance that begins relatively shortly before the piecer and relatively can be filtered out of its thread signals ends shortly after the piecer.

In Weiterbildung der Erfindung sind die Einrichtung zum automatischen Messen der längenbezogenen Durchmesserwerte und/oder die Einrichtung zum elektronischen Speichern der gemessenen längenbezogenen Durchmesserwerte und/oder der Komparator an einen Mittelwertbilder angeschlossen. Außerdem ist in Weiterbildung der Erfindung der Komparator zur Übernahme der im Mittelwertbilder gebildeten Mittelwerte der gemessenen längenbezogenen Durchmesserwerte als Vergleichswerte eingerichtet. Als Zwischenglied zwischen Mittelwertbilder und Komparator kann ein Sollwertgeber angeordnet sein, der beispielsweise nach Wahl auf Handbetrieb oder automatischen Betrieb gestellt werden kann.In a further development of the invention, the device for automatically measuring the length-related diameter values and / or the device for electronically storing the measured length-related diameter values and / or the Comparator connected to a mean value graph. In a further development of the invention, the comparator is set up to take over the mean values of the measured length-related diameter values formed in the mean value images as comparison values. A setpoint generator can be arranged as an intermediate link between the mean value images and the comparator, which can be set to manual or automatic operation, for example, as desired.

In Weiterbildung der Erfindung ist die Anspinnfasermengen-Dosiervorrichtung mit einem Korrekturmengeneinsteller verbunden. Dieser Korrekturmengeneinsteller kann von Hand oder automatisch einstellbar sein. Die Größe der zulässigen Korrekturmenge kann beispielsweise automatisch davon abhängig gemacht werden, wie viele Anspinner in einem bestimmten zurückliegenden Zeitabschnitt hergestellt wurden.In a further development of the invention, the piecing fiber quantity dosing device is connected to a correction quantity adjuster. This correction amount adjuster can be set manually or automatically. The size of the allowable amount of correction can, for example, be made automatically dependent on how many piecers were produced in a certain past time period.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung schematisch dargestellt. Anhand dieses Schaltungsbeispiels wird die Erfindung weiter erläutert und beschrieben.An embodiment of the invention is shown schematically in the drawing. The invention is further explained and described on the basis of this circuit example.

Eine OE-Spinnmaschine besitzt eine Mehrzahl von OE-Spinnaggregaten 1 mit jeweils einer Faserbandeinzugsvorrichtung 2, einer Auflösevorrichtung 3, einer Faserleitvorrichtung 4, einem Fasersammler 5 und einer Abzugsvorrichtung 6.An OE spinning machine has a plurality of OE spinning units 1, each with a sliver drawing-in device 2, a dissolving device 3, a fiber guiding device 4, a fiber collector 5 and a take-off device 6.

Die Faserbandeinzugsvorrichtung 2 besteht aus einer durch einen Elektromotor angetriebenen Einzugswalze. Dem Elektromotor ist ein Schalter 7 vorgeschaltet. Das Faserband 8 gelangt über einen Zuführtisch 9 unter der Einzugswalze hindurch zu der Auflösevorrichtung 3. Die Auflösevorrichtung 3 besteht aus einer rotierenden, gezahnten Walze. Die Faserleitvorrichtung 4 ist als ein Faserkanal ausgebildet, der von dem Gehäuse 10 der Auflösevorrichtung 3 bis zum Fasersammler 5 reicht. Der Fasersammler 5 ist als Rotor ausgebildet, der auf einer Welle 11 sitzt. Die durch die Auflösevorrichtung 3 vereinzelten Fasern 12 gelangen zunächst auf die kegelmantelförmige Rutschfläche 13 und von dort in die Fasersammelrille 14 des rotierenden Fasersammlers 5.The sliver feed device 2 consists of a feed roller driven by an electric motor. A switch 7 is connected upstream of the electric motor. The sliver 8 passes through a feed table 9 under the feed roller to the opening device 3. The opening device 3 consists of a rotating, toothed roller. The fiber guiding device 4 is designed as a fiber channel that extends from the housing 10 of the opening device 3 to the fiber collector 5. The fiber collector 5 is designed as a rotor which sits on a shaft 11. The fibers 12 separated by the dissolving device 3 first reach the conical jacket-shaped sliding surface 13 and from there into the fiber collecting groove 14 of the rotating fiber collector 5.

Der Fasersammler 5 bringt die in der Fasersammelrille 14 liegenden Fasern in eine Drehbewegung. Sie rotieren, indem sie sich der Länge nach in die Fasersammelrille 14 legen, um die gemeinsame Drehachse der Welle 11 und des Fasersammlers 5.The fiber collector 5 brings the fibers lying in the fiber collecting groove 14 into a rotational movement. They rotate by lying lengthwise in the fiber collecting groove 14 about the common axis of rotation of the shaft 11 and the fiber collector 5.

In der Fasersammelrille 14 legen sich die dort befindlichen Fasern an das Fadenende 16 an. Der zum Fadenende 16 gehörende Faden 17 wird durch ein Fadenabzugsrohr 18 hindurch in Richtung des Pfeils 19 mit Hilfe der Abzugsvorrichtung 6 fortlaufend abgezogen. Die Abzugsvorrichtung 6 besteht aus einem Walzenpaar.In the fiber collecting groove 14, the fibers located there lie against the thread end 16. The thread 17 belonging to the thread end 16 is continuously drawn off through a thread draw-off tube 18 in the direction of arrow 19 with the help of the draw-off device 6. The trigger device 6 consists of a pair of rollers.

Im normalen Spinnbetrieb folgt der Faden 17 der unterbrochenen Linie 17′. Er wird fortlaufend auf eine hier nicht dargestellte Kreuzspule aufgewickelt. Die Abzugsvorrichtung 6 kann zum Zweck des Anspinnens und der Rückführung des Fadens in den Fasersammler 5 von Vorwärtsgang auf Rückwärtsgang umgestellt werden.In normal spinning operation, the thread 17 follows the broken line 17 '. It is continuously wound on a cheese, not shown here. The take-off device 6 can be switched from forward gear to reverse gear for the purpose of piecing and returning the thread into the fiber collector 5.

Der OE-Spinnmaschine ist eine wanderfähige Anspinnvorrichtung 20 zugeordnet. Die Anspinnvorrichtung 20 wandert von Spinnaggregat zu Spinnaggregat und ist in der Lage, das Wiederanspinnen nach Fadenbruch oder das erstmalige Anspinnen automatisch durchzuführen. Zu diesem Zweck bleibt die Anspinnvorrichtung 20 vor dem betreffenden Spinnaggregat stehen und führt dann nach Programm, zum Beispiel gesteuert durch einstellbare oder steuerbare Zeitrelais, die einzelnen zum Anspinnen erforderlichen Tätigkeiten durch.A mobile piecing device 20 is assigned to the OE spinning machine. The piecing device 20 moves from the spinning unit to the spinning unit and is able to automatically carry out the re-piecing after thread break or the first piecing. For this purpose, the piecing device 20 remains in front of the spinning unit in question stand and then carry out the individual tasks required for piecing according to the program, for example controlled by adjustable or controllable time relays.

Die Zeichnung zeigt in schematischer Darstellung lediglich die zum Verständnis der Erfindung bedeutsamen Teile der Anspinnvorrichtung 20.The drawing shows in a schematic representation only the parts of the piecing device 20 which are important for understanding the invention.

In einem Gerät 15 sind folgende Teile zusammengefaßt:The following parts are combined in a device 15:

An eine Einrichtung 21 zum automatischen Messen der Durchmesserwerte in Zuordnung zur Fadenlängsachse des Anspinners 22 und der vor und hinter dem Anspinner 22 gelegenen, jeweils mindestens die Länge des Anspinners 22 aufweisenden Fadenstrecken 23 und 24 schließt sich ein Verstärker 25 an, an den eine Einrichtung 26 zum elektronischen Speichern der gemessenen, längenbezogenen Durchmesserwerte angeschlossen ist. Von der Einrichtung 26 führt eine Leitung 27 zu einem Mittelwertbilder 29 und eine Leitung 28 zu einem Komparator 30. Der Komparator 30 vergleicht die gemessenen, längenbezogenen Durchmesserwerte mit Vergleichswerten, die ihm von einem Sollwertgeber 31 vorgegeben werden. Der Sollwertgeber 31 ist an den Mittelwertbilder 29 angeschlossen, so daß er die dort gebildeten Mittelwerte als Sollwerte übernehmen kann.An amplifier 25 is connected to a device 21 for automatically measuring the diameter values in association with the longitudinal axis of the piecer 22 and the thread sections 23 and 24 located in front of and behind the piecer 22 and each having at least the length of the piecer 22 for electronically storing the measured, length-related diameter values. A line 27 leads from the device 26 to a mean value image 29 and a line 28 to a comparator 30. The comparator 30 compares the measured, length-related diameter values with comparison values which are given to it by a setpoint generator 31. The setpoint generator 31 is connected to the mean value image 29 so that it can adopt the mean values formed there as setpoints.

Die Einrichtung 21 ist ein Fadensignalaufnehmer, der in diesem Fall so angeordnet ist, daß er zum gleichen Zeitpunkt sowohl den Anspinner 22 als auch die vor und hinter dem Anspinner gelegenen Fadenstrecken 23 und 24 beobachten und messen kann. Die Speichereinrichtung 26 speichert diejenigen Meßwerte, die sich zu dem Zeitpunkt ergeben, wenn sich der Anspinner 22 in der Mitte zwischen zwei Fadenführern 32 und 33 und somit auch mitten vor dem Fadensignalaufnehmer 21 befindet. Die Speichereinrichtung 26 gibt ihren Inhalt an den Mittelwertbilder 29 zwecks Bildung eines Mittelwertes aus bereits vorgenommenen Messungen und an den Komparator 30 zum Bilden eines Vergleichswertes weiter.The device 21 is a thread signal pickup, which in this case is arranged in such a way that it can observe and measure both the piecer 22 and the thread sections 23 and 24 located in front of and behind the piecer at the same time. The storage device 26 stores those measured values which result at the time when the piecer 22 is in the middle between two thread guides 32 and 33 and thus also in the middle of the Thread signal pickup 21 is located. The storage device 26 transmits its content to the mean value image 29 for the purpose of forming an average value from measurements already carried out and to the comparator 30 for forming a comparison value.

Der vom Komparator 30 ermittelte Vergleichswert gelangt über eine Leitung 34 zu einer Einrichtung 35 zum Ableiten von Eingriffsmöglichkeiten zur Verbesserung des Anspinnerprofils künftiger Anspinner.The comparative value determined by the comparator 30 is sent via line 34 to a device 35 for deriving intervention options for improving the piecing profile of future piecers.

Die Einrichtung 35 enthält als Anspinnfasermengen-Dosiervorrichtung 36 einen Rechner, dem ein Speicher 37 vorgeschaltet ist, der durch die Leitung 34 mit dem Komparator 30 verbunden ist. An den Rechner 36 schließt sich ein Signalumsetzer 38 an. Der Signalumsetzer 38 kann wahlweise analoge oder digitale Steuersignale als Korrektursignale für die Faserbandeinzugsvorrichtung 2 ausgeben. Vom Signalumsetzer 38 führt eine Leitung 39 zu einem Elektromagnetantrieb 40, der eine lösbare Wirkverbindung zum Schalter 7 der Faserbandeinzugsvorrichtung 2 herstellen kann. Die Wirkverbindung kommt dadurch zustande, daß der Elektromagnetantrieb 40 einen Stößel 41 ausfährt, der mechanisch auf einen Schalthebel 42 des Schalters 7 einwirkt mit dem Ziel, den Schalter 7 einzuschalten oder nach Zurückziehen des Stößels 41 wieder auszuschalten. Der Schalter 7 kann allerdings auch auf hier nicht dargestellte Art und Weise elektromagnetisch von dem OE-Spinnaggregat 1 aus ein- und ausgeschaltet werden. Solange aber die Anspinnvorrichtung 20 vor dem OE-Spinnaggregat 1 tätig ist, übernimmt sie das Schalten des Schalters 7.The device 35 contains, as piecing fiber quantity metering device 36, a computer which is preceded by a memory 37 which is connected to the comparator 30 by the line 34. A signal converter 38 connects to the computer 36. The signal converter 38 can optionally output analog or digital control signals as correction signals for the fiber ribbon feed device 2. A line 39 leads from the signal converter 38 to an electromagnetic drive 40, which can establish a releasable operative connection to the switch 7 of the sliver drawing-in device 2. The operative connection comes about in that the electromagnetic drive 40 extends a plunger 41, which acts mechanically on a switching lever 42 of the switch 7 with the aim of turning the switch 7 on or off again after the plunger 41 has been withdrawn. However, the switch 7 can also be switched on and off electromagnetically from the OE spinning unit 1 in a manner not shown here. However, as long as the piecing device 20 is active in front of the OE spinning unit 1, it takes over the switching of the switch 7.

Anläßlich des Herstellens des Anspinners 22, das auf an sich bekannte Art und Weise geschieht und hier nicht näher beschrieben ist, holen die Fadenführer 32 und 33 der Anspinnvorrichtung 20 den Faden 17 aus seiner normalen Lauflage 17′ bis vor die Einrichtung 21, die mit ihren Messungen bereits so frühzeitig beginnt, daß sie bei laufendem Faden auch den Anspinner 22 und die vor und hinter dem Anspinner gelegenen Fadenstrecken 23 und 24 im richtigen Zeitpunkt erfassen kann. Die verstärkten und in der Einrichtung 26 gespeicherten Fadensignale werden im Komparator 30 mit Vergleichswerten verglichen, und das Vergleichsergebnis gelangt über die Leitung 34 zur Einrichtung 35, wo es im Speicher 37 zum Herstellen eines künftigen Anspinners gespeichert wird. Im Speicher 37 ist auch noch das vorherige Vergleichsergebnis gespeichert, so daß der Rechner 36 beide Vergleichsergebnisse miteinander vergleichen kann, um festzustellen, ob der gerade vorhandene Anspinner 22 dem Qualitätsstandard entspricht oder nicht.On the occasion of the manufacture of the piecer 22, which is done in a manner known per se and is not described in more detail here, the thread guides 32 and 33 of the piecing device 20 fetch the thread 17 from its normal running position 17 'until the device 21, with its Measurements begin so early that when the thread is running, it can also detect the piecer 22 and the thread sections 23 and 24 located in front of and behind the piecer at the right time. The amplified thread signals stored in the device 26 are compared in the comparator 30 with comparison values, and the comparison result passes via the line 34 to the device 35, where it is stored in the memory 37 for producing a future piecer. The previous comparison result is also stored in the memory 37, so that the computer 36 can compare the two comparison results with one another in order to determine whether the piecer 22 currently present corresponds to the quality standard or not.

Falls der Anspinner 22 dem Qualitätsstandard nicht entspricht, veranlaßt der Rechner 36 über den Signalumsetzer 38 und den Elektromagnetantrieb 40 das Öffnen des Schalters 7 und dadurch das Unterbinden der weiteren Zufuhr des Faserbands 8, wodurch ein Fadenbruch zustande kommt mit der Folge, daß der Anspinnvorgang noch einmal wiederholt werden muß. Die Zeichnung zeigt, daß der Anspinner 22 den Qualitätsstandard nicht erfüllt hat und daß der Schalter 7 bereits ausgeschaltet ist.If the piecer 22 does not meet the quality standard, the computer 36 causes the signal converter 38 and the electromagnetic drive 40 to open the switch 7 and thereby prevent further feeding of the fiber sliver 8, causing a thread breakage, with the result that the piecing process is still must be repeated once. The drawing shows that the piecer 22 has not met the quality standard and that the switch 7 is already switched off.

Für den nächstfolgenden Anspinnvorgang bleibt jetzt nur noch der zuletzt gemessene Vergleichswert im Speicher 37.For the next subsequent piecing process, only the last measured comparison value now remains in the memory 37.

Wenn sich der Anspinner 22 vor der Einrichtung 21 befindet, läuft die Faserband-Einzugsvorrichtung 2 dann, wenn der Anspinner qualitativ gut ist, mit Betriebsgeschwindigkeit. Die beiden Fadenführer 32 und 33 bewegen sich anschließend nach links, um den Faden 17 in seine normale Lauflage 17′ zu bringen. Dann geben sie den Faden 17 frei. Nachdem der Schalter 7 wieder Verbindung mit einer Spinnaggregat-eigenen Betätigungsvorrichtung hat, kann die Anspinnvorrichtung 20 an einen neuen Arbeitsort weiterfahren. An dem neuen Arbeitsort übernimmt die Anspinnvorrichtung 20 dann wieder das Schalten des dort befindlichen Schalters 7 nach Maßgabe des im Speicher 37 festgehaltenen Vergleichsergebnisses der vorhergehenden Anspinnermessung an dem OE-Spinnaggregat 1. Vor dem Herstellen des Anspinners wird der Schalter 7 nach Maßgabe der von der Anspinnfasermengen-Dosiervorrichtung 36 ermittelten Einschaltdauer zum Eingeben einer bestimmten Anspinnfasermenge in den Fasersammler 5 vorübergehend eingeschaltet. Die maximal mögliche Einschaltdauer ist an einem Korrekturmengeneinsteller 44 eingestellt worden. Danach wird die Abzugsvorrichtung 6 gestartet und der Faden 17 in Richtung des Pfeils 19 laufend abgezogen. Mit dem Start der Abzugsvorrichtung 6 wird auch der Schalter 7 wieder eingeschaltet. Sollte der Anspinner 22 den Qualitätsanforderungen nicht genügen, wird der Schalter 7 wieder ausgeschaltet, anderenfalls bleibt er eingeschaltet.If the piecer 22 is located in front of the device 21, the sliver feed device 2 also runs when the piecer is of good quality Operating speed. The two thread guides 32 and 33 then move to the left to bring the thread 17 into its normal running position 17 '. Then they release the thread 17. After the switch 7 is again connected to a spinning unit's own actuating device, the piecing device 20 can continue to a new work location. At the new place of work, the piecing device 20 then takes over the switching of the switch 7 located there in accordance with the comparison result of the previous piecer measurement on the OE spinning unit 1, which is stored in the memory 37 -Dosing device 36 determined duty cycle for entering a certain amount of piecing fibers in the fiber collector 5 temporarily switched on. The maximum possible duty cycle has been set on a correction quantity adjuster 44. The take-off device 6 is then started and the thread 17 continuously drawn in the direction of the arrow 19. When the trigger device 6 starts, the switch 7 is also switched on again. If the piecer 22 does not meet the quality requirements, the switch 7 is switched off again, otherwise it remains switched on.

Der Rechner 36 besitzt noch einige Ausgänge 43, an die beispielsweise Anzeigeeinrichtungen, Registriereinrichtungen, Meldeeinrichtungen oder ganz allgemein weitere Einrichtungen zum Ableiten von Eingriffsmöglichkeiten zur Verbesserung des Anspinnerprofils künftiger Anspinner angeschlossen werden können. Außer durch die Menge der vorab eingespeisten Fasern kann das Anspinnerprofil auch durch Steuerung der Abzugsvorrichtung 6, der Faserband-Einzugsvorrichtung 2 und/oder der Auflösevorrichtung 3 und/oder der Drehzahl der Welle 11 beeinflußt werden.The computer 36 also has a few outputs 43 to which, for example, display devices, registration devices, notification devices or, in general, other devices for deriving intervention options for improving the piecing profile of future piecers can be connected. In addition to the amount of pre-fed fibers, the piecing profile can also be controlled by Pulling device 6, the sliver feed device 2 and / or the opening device 3 and / or the speed of the shaft 11 are influenced.

Die Einrichtung 21 kann unterschiedlich ausgebildet sein. Sie kann beispielsweise so eingerichtet sein, daß sie optoelektrisch über eine bestimmte kurze Fadenstrecke den Durchmesser beziehungsweise das Profil des Fadens beziehungsweise Anspinners erfaßt und dieses Fadensignal beispielsweise zu einem Kurvenzug aufarbeitet. Das Fadensignal kann auch kapazitiv oder auf irgendeine andere bekannte Art erfaßt werden. Unabhängig von der Art der Erfassung der Fadensignale liegt schließlich ein mehr oder weniger genaues elektronisches Abbild des Anspinners und seiner benachbarten Fadenstrecken in der Einrichtung 26 vor.The device 21 can be designed differently. For example, it can be set up in such a way that it detects the diameter or profile of the thread or piecer optoelectrically over a certain short thread path and processes this thread signal, for example, into a curve. The thread signal can also be detected capacitively or in any other known manner. Regardless of the type of detection of the thread signals, there is finally a more or less accurate electronic image of the piecing device and its adjacent thread sections in the device 26.

Claims (12)

  1. Method of monitoring the thread-joiners (22) in an open-end spinning unit comprising a fibre band draw-in device (2), a teasing device (3), a fibre guide device (4), a fibre collector (5) for collecting the fibres (12), arranging them and imparting a rotary movement to them, and thereafter laying them against the open thread end (16), and a pulling device (6) pulling the thread (17) out of the fibre collector (5), wherein the guided-back thread end (16) is laid against a joining-on quantity of fibres fed into the fibre collector (5) for the purpose of forming the thread-joiner, whereupon the thread (17) is continually pulled out of the fibre collector (5) and fibres are continually fed into the fibre collector (5), characterized in that the diameter values in association with the thread longitudinal axis are automatically read at the thread-joiner (22) and at each of the thread length elements (23, 24) disposed before and behind the thread-joiner (22) and each having at least the length of the thread-joiner (22), are electronically stored and are compared with reference values, and that from this comparison intervention possibilities are derived for improving future thread-joiners, especially for improving the thread-joiner profile.
  2. Method according to Claim 1, characterized in that the result of the comparison is utilized for electronically controlling an automatically operating thread-joining device.
  3. Method according to Claim 2, characterized in that the result of the comparison is utilized for measuring a joining-on fibres quantity previously fed into the fibres collector.
  4. Method according to Claim 3, characterized in that, at each change in the joining-on fibres quantity, this change neither exceeds nor falls below a predetermined correction fibres quantity, within tolerance limits.
  5. Method according to one of Claims 1 to 4, characterized in that mean values are formed from the length-related diameter values obtained from successively performed thread-joining operations, and that from these mean values the reference values are derived or formed.
  6. Thread-joining device on an open-end spinning machine for forming a thread-joiner (22) in an open-end spinning unit comprising a fibre band draw-in device (2), a teasing device (3), a fibre guide device (4), a fibres collector (5) for collecting the fibres (12), arranging them and imparting a rotary movement to them, and thereafter laying them against the open thread-end (16), and a pulling device (6) pulling the thread (17) out of the fibres collector (5), wherein the backward-guided thread end (16) is laid against a joining-on fibres quantity fed into the fibres collector (5) for the purpose of forming the thread-joiner (22), whereupon the thread (17) is continually pulled out of the fibres collector (5) and fibres (12) are continually fed into the fibres collector (5), for carrying out the method according to one of Claims 1 to 5, characterized by a device (21) for automatically measuring the diameter values in association with the thread longitudinal axis of the thread-joiner (22) and of each of the thread length elements (23, 24) disposed before and behind the thread-joiner (22) and each having a length at least equal to that of the thread-joiner (22), a device (26) for electronically storing the measured, length-related diameter values, a device (30) for comparing the measured, length-related diameter values with reference values, and by a device (35) for deriving intervention possibilities for improving the thread-joiner profile of future thread-joiners (22).
  7. Thread-joining device according to Claim 6, characterized in that the device (35) for deriving intervention possibilities for improving the thread-joiner profile of future thread-joiners possesses a controllable metering device (36) for the joining-on fibres quantity.
  8. Thread-joining device according to Claim 7, characterized in that the metering device (36) for the joining-on fibres quantity possesses a releasable operative connection (39, 40, 41) to the fibre band draw-in device (2) of the open-end spinning unit (1).
  9. Thread-joining device according to Claim 7 or 8, characterized by a thread signal pick-up (21), to which at least one comparator (30), responding to thread signals which deviate from reference values, is connected.
  10. Thread-joining device according to one of Claims 6 to 9, characterized in that the devices (21) and/or (26) and/or the comparator (30) are connected to a mean value former (29).
  11. Thread-joining device according to Claim 10, characterized in that the comparator (30) is arranged for taking-over the mean value of the measured, length-related diameter values formed in the mean value former (29) as reference values.
  12. Thread-joining device according to one of Claims 7 to 11, characterized in that the metering device (36) for the joining-on fibres quantity is connected to a correction quantity adjuster (44).
EP88106282A 1987-05-19 1988-04-20 Method and apparatus for controlling pieced yarn in an open-end spinning unit Expired - Lifetime EP0291710B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873716728 DE3716728A1 (en) 1987-05-19 1987-05-19 METHOD AND DEVICE FOR MONITORING THE TENSIONER IN AN OE-SPINNAGGREGAT
DE3716728 1987-05-19

Publications (2)

Publication Number Publication Date
EP0291710A1 EP0291710A1 (en) 1988-11-23
EP0291710B1 true EP0291710B1 (en) 1992-01-22

Family

ID=6327863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88106282A Expired - Lifetime EP0291710B1 (en) 1987-05-19 1988-04-20 Method and apparatus for controlling pieced yarn in an open-end spinning unit

Country Status (4)

Country Link
US (1) US4825632A (en)
EP (1) EP0291710B1 (en)
JP (1) JP2716455B2 (en)
DE (2) DE3716728A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5832709A (en) * 1995-12-20 1998-11-10 W. Schlafhorst Ag & Co. Method of checking the yarn profile associated with a yarn piecing operation in an open-end spinning machine
DE19649314B4 (en) * 1995-12-20 2006-06-14 Saurer Gmbh & Co. Kg Procedure for checking the thread profile

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4030100C2 (en) * 1990-09-22 2000-03-23 Schlafhorst & Co W Method and device for determining the changes in criteria of an automatic piecing process
DE4404538C1 (en) * 1994-02-12 1995-04-27 Rieter Ingolstadt Spinnerei Method and device for piecing on an open-end spinning apparatus
DE19955674A1 (en) * 1999-11-19 2001-05-23 Schlafhorst & Co W Piecing device with an evaluation device for determining parameters of an automatic piecing process
DE10354608A1 (en) * 2003-11-21 2005-06-16 Saurer Gmbh & Co. Kg Process for producing a fancy yarn on an open-end rotor spinning machine and fancy yarn
DE102005033562A1 (en) * 2005-07-19 2007-01-25 Saurer Gmbh & Co. Kg Method for operating an open-end spinning device
DE102016109682A1 (en) 2016-05-25 2017-11-30 Rieter Ingolstadt Gmbh Method for piecing a thread in an open-end spinning device
CN113279096B (en) * 2021-06-11 2022-03-29 日照品特裕华纺织科技有限公司 Intelligent yarn broken end lapping system of ring spinning frame

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS167566B1 (en) * 1972-09-26 1976-04-29
CH568405A5 (en) * 1974-02-08 1975-10-31 Zellweger Uster Ag
DE2437485A1 (en) * 1974-08-03 1976-02-12 Zinser Textilmaschinen Gmbh METHOD AND DEVICE FOR MONITORING THE OPERATION OF TEXTILE MACHINES DELIVERING FAEDEN
DE2507199C2 (en) * 1975-02-20 1986-01-30 W. Schlafhorst & Co, 4050 Mönchengladbach Device for controlling the piecing process in rotor spinning machines
DE2605737B2 (en) * 1976-02-13 1979-08-30 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt Working method for recognizing the incorrect operation of spinning units of open-end spinning machines
DE2605978C2 (en) * 1976-02-14 1986-06-05 W. Schlafhorst & Co, 4050 Mönchengladbach Device for controlling the piecing process in rotor spinning machines
DE2714353A1 (en) * 1977-03-31 1978-10-12 Fritz Stahlecker TEXTILE MACHINE WITH DEVICES FOR DETECTING THE LATERAL DIMENSION OF THE RUNNING YARN
DE2725105C3 (en) * 1977-06-03 1994-07-07 Fritz Stahlecker Method for carrying out a piecing process and device for carrying out the method
JPS5930922A (en) * 1982-08-12 1984-02-18 Toyoda Autom Loom Works Ltd Ending in open end fine spinning frame
DE3402367A1 (en) * 1984-01-25 1985-08-01 Fritz 7347 Bad Überkingen Stahlecker OE FRICTION SPINNING MACHINE WITH A VARIETY OF SPINNING UNITS
SE442915B (en) * 1984-07-25 1986-02-03 Barnaulskij Ok B Avtomatiki PROCEDURE FOR SEATING THE DIAMETER OF A TRADE
CS251339B1 (en) * 1984-09-26 1987-06-11 Frantisek Burysek Spinning-in process control device in spinning units
DE3440009C2 (en) * 1984-11-02 1994-07-07 Schlafhorst & Co W Method and device for forming a piecer
DE3606466A1 (en) * 1985-03-22 1986-09-25 Fritz 7347 Bad Überkingen Stahlecker Method for operating an open-end friction spinning machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5832709A (en) * 1995-12-20 1998-11-10 W. Schlafhorst Ag & Co. Method of checking the yarn profile associated with a yarn piecing operation in an open-end spinning machine
DE19649314B4 (en) * 1995-12-20 2006-06-14 Saurer Gmbh & Co. Kg Procedure for checking the thread profile
DE19649329B4 (en) * 1995-12-20 2007-12-13 Oerlikon Textile Gmbh & Co. Kg Method for checking the thread profile on a running thread during piecing in an open-end spinning machine

Also Published As

Publication number Publication date
JPH01156520A (en) 1989-06-20
EP0291710A1 (en) 1988-11-23
DE3716728A1 (en) 1988-12-01
US4825632A (en) 1989-05-02
DE3867901D1 (en) 1992-03-05
JP2716455B2 (en) 1998-02-18

Similar Documents

Publication Publication Date Title
DE3530905C2 (en)
DE2725105C2 (en) Method for carrying out a piecing process and device for carrying out the method
EP2184387B1 (en) Method for operating an open ended spinning frame and open ended spinning machine
EP1101846B1 (en) Piecing device comprising an evaluation unit for determining parameters of an automatic piecing process
DE2543839B1 (en) DEVICE FOR CREATING A UNIFORM TEXTILE FIBER TAPE
EP0123969B1 (en) Method of making an endless tubular felt, and apparatus for carrying out this method
DE2544209A1 (en) PROCESS FOR SPINNING AN OPEN-END SPINNING UNIT
DE2620806C2 (en) Method for transferring a running thread from a piecing device to a spinning unit
DE2605978C2 (en) Device for controlling the piecing process in rotor spinning machines
DE3440009C2 (en) Method and device for forming a piecer
EP1960574B1 (en) Method for starting to spin a thread, and rotor-spinning machine for carrying out the method
DE102007018536B4 (en) Open-end spinning machine
EP0291710B1 (en) Method and apparatus for controlling pieced yarn in an open-end spinning unit
DE3427357A1 (en) METHOD AND DEVICE FOR DETERMINING YARN NUMBER OR THICKNESS DIFFERENCES
DE102015122391B4 (en) Method for controlling a piecing process for re-piecing a yarn on a spinning machine
DE3206272C2 (en)
DE10348689A1 (en) Process for producing a fancy yarn
DE3516120C2 (en) Automatic piecing method and automatic piecing device
DE2556237C2 (en) Spinning machine system with several open-end spinning machines and at least one maintenance device
EP1749907B1 (en) Method for controlling the draft in a drafting area of a textile machine, and the textile machine
DE2432938B2 (en) METHOD AND DEVICE FOR THREAD LENGTH MEASUREMENT IN A TEXTILE MACHINE WITH SEVERAL WINDING STATIONS
DE3144760C2 (en) Method and device for controlling the piecing process in an open-end rotor spinning machine
DE102022117598B3 (en) Device for drawing and winding threads
WO2005071150A1 (en) Method for the production of a fancy yarn
EP3875647B1 (en) Spinning machine and method for operating same

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FR GB IT LI

17P Request for examination filed

Effective date: 19890304

17Q First examination report despatched

Effective date: 19900925

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: W. SCHLAFHORST AG & CO.

ITF It: translation for a ep patent filed

Owner name: DE DOMINICIS & MAYER S.R.L.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB IT LI

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3867901

Country of ref document: DE

Date of ref document: 19920305

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19990322

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000420

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20000420

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20050419

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20050425

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20050427

Year of fee payment: 18

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060430

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060430

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20060430

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061101

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20061230

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060502

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070420