EP3489399B1 - Offenendspinnmaschine mit einer verbesserten entsorgungsdüse und entsprechendes spleissverfahren - Google Patents

Offenendspinnmaschine mit einer verbesserten entsorgungsdüse und entsprechendes spleissverfahren Download PDF

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Publication number
EP3489399B1
EP3489399B1 EP18207907.9A EP18207907A EP3489399B1 EP 3489399 B1 EP3489399 B1 EP 3489399B1 EP 18207907 A EP18207907 A EP 18207907A EP 3489399 B1 EP3489399 B1 EP 3489399B1
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Prior art keywords
yarn
spinning
piecing
open
intake nozzle
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English (en)
French (fr)
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EP3489399A1 (de
Inventor
Maurizio Antoniel
Vittorio Colussi
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Savio Macchine Tessili SpA
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Savio Macchine Tessili SpA
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    • 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 present invention relates to an open-end type spinning machine with an enhanced intake nozzle unit and the relative piecing method in an open-end type spinning machine.
  • this piecing is performed by using the yarn end picked up before the breakage to 'trigger' the spinning; in particular, the fibres of the new yarn will congregate on the old end, thus achieving a continuity in the yarn produced.
  • the known open-end type spinning machines of interest for this patent are completely automatic machines in which the doffing and piecing cycles are performed by a single trolley.
  • the intake nozzle picks up the end of the yarn of the reel being formed. It contains an optical sensor to check the presence of the yarn; conventionally the device is actuated by a stepper motor.
  • the yarn centering unit catches the yarn from the nozzle and leads it to the preparation unit.
  • the device is actuated by a pneumatic cylinder.
  • the yarn preparation unit draws in the yarn, cuts it and prepares the end for the piecing; furthermore, it is equipped with a device to ensure the gripping of the yarn by the rollers of the introduction/extraction group.
  • the group is actuated by means of pneumatic cylinders and by means of depression.
  • the introduction and extraction group takes the yarn from the preparing unit to bring it in the vicinity of the output hole of the spinning unit and introduces the length thereof required to reach the rotor throat.
  • the groups are actuated by means of stepper motors (Rotation) and by means of pneumatic cylinders (lateral displacement).
  • the reel is lifted from the stop plate by means of a reel-lifting arm; the reel intake nozzle intervenes, which descends, tilting, from the rest position to the vicinity of the reel (at a distance of about 5/6 mm) .
  • intake is actuated.
  • the terminal part of the nozzle has an intake cavity in the form of a low slit as wide as the width of the reel, to allow the end to be picked up in an indeterminate position on the reel.
  • the reel is rotated by means of the reverse roller, to allow the identification and extraction of the yarn end from the reel.
  • a specific device on the same trolley, deals with the aperture of the rubber yarn extraction roll.
  • the search for the end continues until the optical sensor (the yarn presence sensor) of the nozzle verifies the presence thereof: if it is not detected, the search is repeated twice. If, despite the various attempts, the end is not picked up, the system managing the machine emits a warning, by means of a signal (light/sound), requesting the intervention of an operator to solve the issue.
  • the optical sensor the yarn presence sensor
  • the nozzle moves back to the rest position.
  • This backing allows the yarn to be stretched, making space for the intervention with the yarn centering unit which descends, by tilting, into a working position, finding the yarn in a certain position.
  • the centering unit intercepts the yarn and leads it in the vicinity of the yarn preparation unit. At this point the reel is stopped.
  • the nozzle advances slightly forward to loosen the yarn, the scissors of the centering unit cut the yarn which is picked up, by suction, by the yarn preparation unit.
  • the cut piece of yarn is drawn in and removed from the reel intake nozzle while it returns to the rest position thereof.
  • the new end just made is directed by the preparation device which, by means of a jet of compressed air, frays it to prepare it for the subsequent piecing step. Once the yarn preparation is completed, the introduction and extraction group moves into position to pick the yarn up.
  • the prepared end, picked up by the introduction group, is first passed between the rollers of the extraction roller, then brought in the vicinity of the yarn output tube at the spinning unit, and inserted into the tube so as to reach the rotor throat. Accuracy when positioning the yarn end in the rotor throat determines the quality of the piecing.
  • the yarn end introduced up to the rotor throat 'triggers' the spinning, so that the fibres processed by the rotor congregate at the end properly prepared, thus achieving continuity in the yarn produced.
  • the actual piecing is physically realized.
  • the rotation of the reel is then restarted by lowering the reel onto the drag cylinder by means of the stop plate: the pick-up is reactivated, the piecing cycle is completed and the normal spinning is restored.
  • the trolley has completed the cycle and is free to leave.
  • Such known devices in addition to increasing the complexity and the costs of the machine, also increase the time required to perform the piecing of the broken yarn.
  • Such devices are disclosed, for example, by GB 2187211 A , EP 3124413 A1 , JP S5969373 A , EP 0067279 A1 , JP H10 110334 A .
  • the spinning machine 4 comprises at least one spinning head 8 having a spinning unit 12 and a winding unit into reels 16, wherein the winding unit into reels 16 winds a reel of yarn 18 obtained from the underlying spinning unit 12 on a tube 20.
  • the spinning unit 12 produces yarn 22 by introducing a fibre web into a spinning rotor 24.
  • the spinning machine 4 comprises at least one mobile piecing trolley 28 so as to be able to position itself in the vicinity of each spinning head 8 and perform piecing operations of a broken yarn 22.
  • the spinning machine 4 comprises at least one doffing trolley 32 which can be positioned at each spinning head 8 and is fitted with devices for picking up and moving a tube 20 from a tube-holder basket to a pair of tailstocks of the winding unit into reels 16, in a known manner.
  • the piecing trolley 28 and the doffing trolley 32 at least partially penetrate each other so as to mutually override each other along a patrol path of the spinning heads 8 of the spinning machine 4.
  • Penetrating each other means that they have a shape and follow a trajectory such that they may meet in any intermediate section and cross it without disturbing each other.
  • the piecing trolley 28 comprises an intake nozzle unit 36 and an introduction group of the yarn 40.
  • the intake nozzle unit 36 is shaped so as to perform all the operations of grasping an end of the yarn 22 and preparing it for the subsequent piecing, as better described below.
  • the introduction group of the yarn 40 is shaped to grasp the end of the yarn 22, previously prepared for piecing, and bring it in the vicinity of the spinning rotor 24 of the spinning unit 12 for the piecing thereof with the yarn being formed.
  • the intake nozzle unit 36 comprises an intake nozzle 44, a yarn presence sensor 48 inside the intake nozzle 44, cutting means 52 for cutting the yarn 22 and a device 56 for the preparation of the end of the yarn 22.
  • the intake nozzle 44 is aeraulically connected, by means of a suitable piping system, not shown in the Figures, to intake means not shown in the Figures capable of creating the necessary depression to draw the yarn in; conventionally, said intake means comprise fans placed in rotation by electric motors.
  • the intake nozzle 44 comprises a cavity 60 therein, which defines a forced channel or passage for the yarn 22 drawn in, as better described below.
  • the intake nozzle 44 comprises a slit-like entrance portion 70 which draws in the yarn and which develops into a straight cylindrical portion 72 inside which the yarn is conveyed.
  • the straight cylindrical intake portion 72 has a nominal inner diameter Dn.
  • the intake nozzle 44 is provided with a flow diverter 68 aeraulically interposed between the entrance portion 70 and the intake pipe on which the nozzle, not shown in the Figures, is inserted.
  • the object of this device is to deviate the axis of the intake pipe, thus forcing the trajectory of the drawn in yarn to make it pass inside the cavity 60.
  • the flow diverter 68 is constructed so as to guarantee the dimensional continuity of the internal diameter of the intake pipe, while, at the same time, avoiding any sudden change of section and roughness to avert grips on which the yarn may get caught.
  • the flow diverter 68 is offset with respect to the intake pipe by a misalignment C of the axis in the flow diverter 68; preferably, such misalignment 68 is related to the nominal inner diameter Dn according to the following formula: 1/2Dn ⁇ C ⁇ 3/4Dn.
  • the flow of air and of the yarn drawn in thereby has a double curvature: a first curvature 76 between the axis Y' of the straight cylindrical portion 72 of the intake nozzle upstream of the flow diverter 68 and a second curvature 80 between the flow diverter 68 and the axis Y" of the intake pipe downstream of the flow diverter 68.
  • a first curvature 76 between the axis Y' of the straight cylindrical portion 72 of the intake nozzle upstream of the flow diverter 68
  • a second curvature 80 between the flow diverter 68 and the axis Y" of the intake pipe downstream of the flow diverter 68.
  • the yarn In the passage between the entrance portion 70 and the flow diverter 68 the yarn is forced by the first and second curvature 76, 80, imposed by the flow diverter 68, to pass tangentially to the two curvatures themselves, choosing the smaller distance path; this ensures that the position of the yarn always lies on a bottom 84 of the hollow of the cavity 60.
  • the bottom 84 is constituted by the portion of the cavity 60 designed for housing in abutment the drawn in yarn.
  • the cavity 60 develops longitudinally along the intake pipe 72 and preferably has a symmetrical section with respect to a transverse plane orthogonal to the axis Y' of the straight cylindrical portion 72 of the intake nozzle 72 upstream of the flow diverter 68.
  • the section of the cavity 60 has slightly different size and shapes when passing between the various transverse sections of the intake pipe 72.
  • the bottom 84 of the cavity 60 with respect to a sectional plane perpendicular to the main axis of extension thereof, has a variable angle of aperture 100 along the extension thereof inside the intake nozzle 44.
  • the cavity 60 in the first portion is narrower, and then widens after the section of the cutting means 52: this guarantees a more accurate positioning in the cutting and preparation steps, which will ensure a better quality of the subsequent piecing.
  • said angle of aperture 100 is between 80° and 100°.
  • said angle of aperture is slightly narrower, i.e., between 75° and 95°.
  • the cavity 60 has the purpose of conveying the drawn in yarn, creating as less turbulence as possible which may disturb the motion of the air carrying the yarn.
  • the motion of the air inside the straight cylindrical portion 72 of the intake nozzle 72 shall be as laminar as possible; for this purpose, the internal lateral surfaces of the straight cylindrical portion 72 of the intake nozzle 72 are connected and free from roughness which may facilitate the detachment of the fluid flow of air from the walls, thus generating turbulence. Turbulence would lead to undesirable displacements of the yarn, making the position thereof uncertain, thus compromising the accuracy of the relative operations.
  • the cutting means 52 are positioned in the vicinity of said cavity 60, inside the intake nozzle 44.
  • the end preparation device 56 of the yarn 22 is positioned, configured to direct a jet of compressed air on said yarn end 22, so as to prepare it for the subsequent piecing step, according to known systems.
  • the spinning machine 4 operates continuously, producing yarn by means of the spinning unit 12; in the meantime, the piecing trolley 28 and the doffing trolley 32 patrol the various spinning heads 8; if necessary, the piecing trolley 28 performs all the piecing operations required.
  • the piecing method comprises the steps of:
  • the piecing trolley 28 deals with the cleaning the spinning rotor 24, and/or with the cleaning of a funnel of said spinning rotor 24 and, subsequently to step g), with the lowering of the reel 18 on a relative stop plate.
  • the spinning head 8 simultaneously to steps f) and g) the spinning head 8 prepares the fibre web discarding the damaged ones and feeding the spinning rotor 24 with new fibres by means of a web feeder roller.
  • step g) the prepared end is picked up by the introduction group of the yarn 40, managed by the piecing trolley 28 which clamps the end between the feed rollers 64 thereof to bring it to the spinning unit 12.
  • said feed rollers 64 of the introduction group of the yarn 40 are assisted by the action of a reverse roller which, by rotating the reel 18, prevents the formation of undesirable loops which might engage the various mechanisms, so as to keep the yarn taut and without slack.
  • step g) the yarn 22 is inserted by the introduction group 40 in a specific path by virtue of the aid of the yarn displacer 51 of the feeding device, and the end is fed into a yarn output channel.
  • a release device 50 is preferably located, which, when armed, holds an extra length of yarn which, upon request, is released by the spinning head 8 allowing the end to reach the throat of the spinning rotor 24.
  • the piecing trolley 28 enables the spinning head 8 and abandons it after completing its tasks.
  • the spinning head 8 detaches the release device, the end reaches the throat of the spinning rotor 24 and 'triggers' spinning, so that the fibres being processed by the spinning rotor 24 congregate at the end properly prepared, thus achieving continuity in the yarn produced.
  • the open-end type spinning machine and the method of piecing a yarn of an open-end type spinning machine according to the invention allow to overcome the drawbacks presented in the background art.
  • the new yarn pick-up system has several advantages with respect to the solutions of the background art.
  • the reduction of the devices adapted to perform the cycle certainly entails a reduction in the overall size, not only of the physical devices but also of the volume necessary for the actuation of the movements of the devices themselves.
  • Reducing the number of devices helps limiting costs, since not only redundant structures (sensors, motors, actuators, etc.) are reduced, but also relative energy consumption.
  • the overall reliability of the system will also improve, since the possible breakdown of mechanical components will diminish (being fewer in number) and the necessary maintenance on the devices will also be reduced.
  • the integration of different devices allows to eliminate functions which would be redundant, such as, for example, the intake system which would be replicated on the preparing unit in order to collect scrap, the centering unit, or the various sensors and motor systems allowing the motion of the devices themselves.
  • the use of a smaller number of devices manipulating the yarn implies a reduction in the number of yarn passages from one device to another; in particular, instead of the three intermediate passages envisaged by known systems (nozzle/centering unit, centering unit/preparing unit, preparing unit/feeding unit), the present invention only provides for one intermediate passage (nozzle/feeding unit).
  • a smaller number of passages also implies a lower possibility that the yarn "escapes" during the transfer, with a consequent loss of machine time to resume the yarn when restoring the cycle.
  • Another advantage in reducing yarn transfers is that the possibility that the yarn itself is damaged, for example, by rubbing against the moving parts of the devices during the passage from one device to another, is reduced.
  • the length of this yarn portion being accurate during the step of insertion into the yarn output tube is very important: the quality of the piecing realized during the piecing step and, consequently, the quality of the entire yarn reel decisively depends on it.
  • a further advantage deriving from the new pick-up system is a better efficiency in machine management deriving from the reduction of yarn handling times, since not only are the passages reduced, but also the possible procedure re-execution times in case the yarn is 'lost' during a passage.
  • the improvement in the efficiency also derives from the reduction in energy consumption (less engines, less sensors, etc.) and from the less energy needed to operate them. Also the reduction of maintenance (having fewer devices) has a positive impact on the overall machine efficiency.

Claims (21)

  1. Offenend-Spinnmaschine (4), umfassend wenigstens einen Spinnkopf (8), welcher eine Spinneinheit (12), die Garn (22) produziert, indem eine Faserbahn in einen Spinnrotor (24) eingeführt wird, und eine Aufwickeleinheit auf Spulen (16) aufweist, wobei die Aufwickeleinheit auf Spulen (16) eine von der darunterliegenden Spinneinheit (12) erhaltene Garnspule (18) auf ein Rohr (20) aufwickelt,
    - wenigstens einen Anspinnwagen (28), welcher beweglich ist, um in der Lage zu sein, sich in der Nähe jedes Spinnkopfs (8) zu positionieren und Anspinnvorgänge eines defekten Garns (22) durchzuführen,
    wobei
    - der Anspinnwagen (28) eine Einlassdüseneinheit (36), welche geformt ist, um alle Vorgänge eines Ergreifens eines Garnendes und eines Vorbereitens des selbigen für darauffolgendes Anspinnen durchzuführen, und eine Einführungsgruppe des Garns (40) umfasst, welche geformt ist, um das Garnende zu greifen, welches zuvor für das Anspinnen vorbereitet worden ist, und um es für dessen Anspinnen mit dem gebildeten Garn zu dem Spinnrotor (24) der Spinneinheit (12) zu bringen,
    wobei die Einlassdüseneinheit (36) eine Einlassdüse (44) mit einem Eingangsabschnitt (70) umfasst, von dem sie das Garn und Schneidemittel (52) zum Schneiden des Garns (22) einzieht,
    dadurch gekennzeichnet, dass die Einlassdüseneinheit ferner einen Garnanwesenheitssensor (48) innerhalb der Einlassdüse (44) und eine Vorbereitungsvorrichtung des Garnendes (56) umfasst, und dass der Eingangsabschnitt (70) in einen geraden, zylindrischen Abschnitt (72) verläuft, in den das Garn befördert wird und der in ein Einlassrohr verläuft, welches einen inneren Durchmesser Dn aufweist, in den das Garn befördert wird,
    und wobei
    die Einlassdüse (44) darin eine Kavität (60) umfasst, die einen Durchgang definiert, in welchen das eingezogene Garn gezwungen wird,
    wobei der Querschnitt für den Durchgang von Luft in dem geraden, zylindrischen Abschnitt der Einlassdüse (72) von dem Einlassabschnitt (70) zu der Endvorbereitungsvorrichtung (56), und von der Endvorbereitungsvorrichtung (56) zu den Schneidemitteln (52) abnimmt.
  2. Offenend-Spinnmaschine (4) nach Anspruch 1, wobei die Einlassdüse (44) mit einem Strömungsverteiler (68) bereitgestellt ist, welcher aeraulisch zwischen dem geraden, zylindrischen Abschnitt (72) und dem Einlassrohr eingefügt ist, wobei der Strömungsverteiler (68) die Achse des geraden, zylindrischen Abschnitts (72) der Einlassdüse umlenkt und somit die Bewegungsbahn des angesaugten Garns zwingt innerhalb der Kavität (60) zu verlaufen.
  3. Offenend-Spinnmaschine (4) nach Anspruch 2, wobei der Strömungsverteiler (68) von dem geraden, zylindrischen Abschnitt der Einlassdüse (72) durch einen Versatz C der Achse in dem Strömungsverteiler (68) versetzt ist.
  4. Offenend-Spinnmaschine (4) nach Anspruch 3, in welcher der Versatz auf den nominalen inneren Durchmesser Dn bezogen ist, entsprechend der folgenden Formel: 1/2Dn<C<3/4Dn.
  5. Offenend-Spinnmaschine (4) nach Anspruch 2, 3 oder 4, wobei der Strömungsverteiler eine doppelte Krümmung aufweist, d. h. eine erste Krümmung (76) zwischen der Y' Achse des geraden, zylindrischen Abschnitts der Einlassdüse (72), stromaufwärts des Strömungsverteilers (68), und einer zweiten Krümmung zwischen dem Strömungsverteiler (68) und der Achse Y" des Einlassrohrs, stromabwärts des Strömungsverteilers (68).
  6. Offenend-Spinnmaschine (4) nach Anspruch 5, wobei die Achsen Y', Y" des geraden, zylindrischen Abschnitts der Einlassdüse (72), stromaufwärts des Einlassrohrs des Strömungsdeflektors (68), parallel zueinander sind.
  7. Offenend-Spinnmaschine (4) nach einem der Ansprüche 1 bis 6, wobei die Kavität (60) einen Boden (84) zur Unterbringung des Garns aufweist, wobei der Boden (84) in Bezug auf eine Ebene senkrecht zu seiner Haupterstreckungsachse einen variablen Öffnungswinkel (100) entlang seiner Erstreckung innerhalb der Einlassdüse (44) aufweist.
  8. Offenend-Spinnmaschine (4) nach Anspruch 7, wobei der Öffnungswinkel (100) bei den Schneidemitteln 52 zwischen 80° und 100° beträgt.
  9. Offenend-Spinnmaschine (4) nach Anspruch 7 oder 9, wobei der Öffnungswinkel bei der Endvorbereitungsvorrichtung (56) zwischen 75° und 95° beträgt.
  10. Offenend-Spinnmaschine (4) nach einem der Ansprüche 1 bis 9, wobei die Reduzierung des Durchgangsbereichs innerhalb des geraden, zylindrischen Abschnitts der Einlassdüse (72) zwischen 2.7% und 3.2% beträgt.
  11. Offenend-Spinnmaschine (4) nach einem der Ansprüche 1 bis 10, wobei, in der Nähe der Kavität (60), die Schneidemittel (52) innerhalb der Einlassdüse (44) positioniert sind.
  12. Offenend-Spinnmaschine (4) nach einem der Ansprüche 1 bis 11, wobei, in der Nähe der Kavität (60), die Endvorbereitungsvorrichtung (56) des Garns positioniert ist, welche dazu eingerichtet ist, einen Druckluftstrahl auf ein Ende des eingezogenen Garns zu richten.
  13. Offenend-Spinnmaschine (4) nach einem der vorhergehenden Ansprüche, wobei die Maschine (4) wenigstens einen Abnahmewagen (32) umfasst, welcher an jedem Spinnkopf (8) positioniert sein kann und mit Vorrichtungen zum Aufnehmen und Bewegen eines Rohrs (20) von einem Rohr-Halterkorb zu einem Paar von Endstücken der Aufwickeleinheit auf Spulen (16) ausgestattet sein kann.
  14. Offenend-Spinnmaschine (4) nach Anspruch 13, wobei der Anspinnwagen (28) und der Abnahmewagen (32) sich wenigstens teilweise durchdringen, um entlang eines Patrouillenwegs der Spinnköpfe (8) der Maschine (4) gegenseitig übereinander zu fahren.
  15. Verfahren zum Anspinnen eines Garns (22) in einer Offenend-Spinnmaschine (4) nach einem der vorhergehenden Ansprüche, umfassend die folgenden Schritte:
    a) Detektieren des Garnbruchs (22), mittels des Garnanwesenheitssensors (49), welcher an dem Spinnkopf angebracht ist,
    b) Anhalten der Spule (18) unter Verwendung einer Anschlagplatte, welche von dem Spinnkopf (8) betätigt wird,
    c) in der Zwischenzeit Bringen des Anspinnwagens (28) zu dem Spinnkopf (12), an dem der Garn-(22)-Bruch aufgetreten ist,
    d) Rotieren der Spule (18) mittels des Anspinnwagens (28), um die Suche nach dem auf der Spule (18) gebrochenen Garnende zu starten, und gleichzeitig die Einlassdüseneinheit (36) des Anspinnwagens (28) in die Nähe der Spule (18) zu bringen, um die das Ende betätigende Einlassmittel anzusaugen, welche mit der Einlassdüse (44) verbunden sind,
    e) Anhalten der Spule (18) nachdem das Garn innerhalb der Einlassdüse (44) aufgenommen worden ist,
    f) Betätigen der Schneidemittel (52), welche innerhalb der Einlassdüse (44) untergebracht sind, Entfernen des geschnittenen Stücks von der Rollenseite (18), Fangen des neuen Endes, welches durch Schneiden hergestellt worden ist und dessen Vorbereiten mit einem Druckluftstrahl mittels einer Endvorbereitungsvorrichtung (56), welche innerhalb der Einlassdüse (44) untergebracht ist,
    g) Betätigen einer Garnzuführeinheit (40) des Anspinnwagens (28), welche das vorbereitete Garnende greift und es in die Spinneinheit (12) einfügt.
  16. Anspinnverfahren eines Fadens in einer Offenend-Spinnmaschine (4) nach Anspruch 15, wobei sich der Anspinnwagen (28) zeitgleich zu den Schritten d), e) und f) mit einem Reinigen des Spinnrotors (24), und/oder einem Reinigen eines Trichters des Spinnrotors (24) und anschließend an Schritt g) einem Absenken der Spule (18) auf eine jeweilige Anschlagplatte befasst.
  17. Anspinnverfahren eines Fadens in einer Offenend-Spinnmaschine (4) nach Anspruch 15 oder 16, wobei der Spinnkopf (8) ebenfalls zeitgleich zu den Schritten f) und g) die Faserbahn vorbereitet, welche die Beschädigten entsorgt und dem Spinnrotor (24) unter Verwendung einer Bahneinzugsrolle neue Fasern zuführt.
  18. Anspinnverfahren eines Fadens in einer Offenend-Spinnmaschine (4) nach Anspruch 15, 16 oder 17, wobei während Schritt g) das vorbereitete Ende von der durch den Anspinnwagen (28) geleiteten Zuführeinheit (40) aufgenommen wird, welcher das Ende zwischen seine Zuführwalzen (64) klemmt, um es zu der Spinneinheit (12) zu bringen.
  19. Anspinnverfahren eines Fadens in einer Offenend-Spinnmaschine (4) nach Anspruch 18, wobei die Zuführwalzen (64) der Zuführeinheit (40) von der Handlung einer Umkehrwalze unterstützt werden, die die Bildung ungewollter Schleifen, welche in die verschiedenen Mechanismen eingreifen könnten, durch Drehen der Spule (18) verhindert, um den Faden straff und ohne Durchhang zu halten.
  20. Anspinnverfahren eines Fadens in einer Offenend-Spinnmaschine (4) nach einem der Ansprüche 15 bis 19, wobei das Garn während dem Schritt g) auf einem spezifischen Weg durch die Zuführeinheit (40) eingefügt wird und ein Ende eines Garns in einen Garnausgangskanal eingeführt wird, wobei entlang eines solchen Weges eine Freigabevorrichtung lokalisiert ist, die in einem geladenen Zustand eine Garnüberlänge enthält, welche auf Anfrage durch den Spinnkopf (8) freigegeben wird, um es dem Ende des Garns zu ermöglichen, den Spinnrotor (24) zu erreichen.
  21. Anspinnverfahren eines Fadens in einer Offenend-Spinnmaschine (4) nach Anspruch 20, wobei der Anspinnwagen (28) den Spinnkopf (8) aktiviert und ihn nachdem er seine Aufgaben vervollständigt hat aufgibt, und wobei der Spinnkopf (8) die Freigabevorrichtung abtrennt, und das Ende den Durchlass des Spinnrotors (24) erreicht und den Spinnvorgang auslöst, so dass sich die von dem Spinnrotor (24) verarbeiteten Fasern am dem ordnungsgemäß vorbereiteten Ende sammeln, wodurch eine Kontinuität des produzierten Garns erreicht wird.
EP18207907.9A 2017-11-27 2018-11-22 Offenendspinnmaschine mit einer verbesserten entsorgungsdüse und entsprechendes spleissverfahren Active EP3489399B1 (de)

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EP3489399A1 (de) 2019-05-29
CN209669418U (zh) 2019-11-22
CN109837619A (zh) 2019-06-04

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