EP1375711A2 - Yarn draw-off nozzle for an open-end spinning machine - Google Patents

Yarn draw-off nozzle for an open-end spinning machine Download PDF

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Publication number
EP1375711A2
EP1375711A2 EP03009160A EP03009160A EP1375711A2 EP 1375711 A2 EP1375711 A2 EP 1375711A2 EP 03009160 A EP03009160 A EP 03009160A EP 03009160 A EP03009160 A EP 03009160A EP 1375711 A2 EP1375711 A2 EP 1375711A2
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EP
European Patent Office
Prior art keywords
yarn
yarn take
nozzle
take
bumps
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP03009160A
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German (de)
French (fr)
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EP1375711A3 (en
EP1375711B1 (en
Inventor
Gerd Stahlecker
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication of EP1375711A2 publication Critical patent/EP1375711A2/en
Publication of EP1375711A3 publication Critical patent/EP1375711A3/en
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Publication of EP1375711B1 publication Critical patent/EP1375711B1/en
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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
    • D01H4/40—Removing running yarn from the yarn forming region, e.g. using tubes

Definitions

  • the invention relates to a yarn take-off nozzle for open-end spinning devices, with a pulling yarn deflecting arched contact surface, which is essentially a flat end face in an essentially perpendicular yarn take-off channel passes over, and with linear unevenness arranged in the contact surface, which on cross the entire length of the yarn to be drawn off at an acute crossing angle, the deviates significantly from 0 ° and 90 °.
  • Bumps of this type on yarn take-off nozzles are known and can either be notches or be formed as bump-like projections. Such are commonly used in practice Bumps are either radial to the center of the yarn take-off nozzle or spiral to.
  • the US Patent 3,965,661 for radial bumps and DE 37 07 526 A1 for called spiral bumps It is also known (German interpretation 21 40 157), on the same yarn take-off nozzle both radial and concentric to the center Provide arranged bumps in the form of notches.
  • Yarn take-off nozzles guide the spun yarn from the heart of the open-end spinning device, the so-called spinning rotor, to the outside.
  • the formation of the yarn take-off nozzle itself has one great influence on the quality of the spun yarn and on the spinning stability of the open-end spinning device.
  • the design of the yarn take-off nozzle ultimately determines the Spinning conditions in the spinning rotor. This is especially true with regard to the yarn twist made by the spun yarn runs back into the inside of a fiber collecting groove of the spinning rotor.
  • the Applying bumps in the form of notches or projections has proven to be suitable here Compromise solution proven.
  • the drawn yarn is given a so-called False twist, which increases the spinning stability and is periodically interrupted by he "jumps back" from time to time. Unfortunately, it has been shown that a Increasing the spinning stability often with a deterioration in the quality of the spun yarns accompanied.
  • the invention is based on the object, one of the unevenness mentioned to have featured yarn take-off nozzle that as well in terms of spinning stability as well has good properties in terms of yarn quality.
  • the task is solved in that neighboring bumps are so close together are arranged so that the yarn always contacts at least one unevenness.
  • a yarn draw-off nozzle with a contact surface is created, in which the false twist effect increases to increase the spinning stability without Fiber damage occurs as with the notched ones known in practice
  • Yarn take-off nozzles are known. Due to the features of the invention, the yarn is on the The edges of the bumps are continuously unrolled. The course of the bumps according to The invention guarantees that - in the presence of bumps formed as notches - the yarn is not pulled into the notch base, but on the notch edges at the bottom the radius of the contact surface undergoes a certain wrap, which the false twist effect of the yarn take-off nozzle without damaging the fibers.
  • the bumps mentioned should be arranged so that the crossing angle with the yarn to be drawn is always between 15 ° and 45 °. It is particularly advantageous if the crossing angle is at least approximately constant over the entire length of the bumps is. For the bumps designed according to the invention, this requires a slight one curved curve, but on the other hand leads to a particularly continuous Force application.
  • the unevenness can either in the direction of the yarn or point in the opposite direction.
  • the rotor plate 2 has a fiber sliding surface which widens conically to form a fiber collecting groove 6 7 on.
  • the hollow interior of the rotor plate 2 has its largest Diameter.
  • the spinning rotor 1 can be opened through a front opening 8 in the rotor housing 5 Pull out the operating side.
  • the opening 8 of the rotor housing 5 is together with the open front 9 of the rotor plate 2 by a cover 10 which can be moved away locked.
  • the cover 10 then puts on with the interposition of an annular seal 11 the rotor housing 5.
  • the cover 10 contains a fiber feed channel 12 which lies outside the drawing plane and which in a manner not shown, because in a known manner, begins at an opening roller and its mouth 13 is directed against the fiber sliding surface 7. Due to the effect of the mentioned vacuum source During operation, the fibers are separated by the opening roller through the fiber feed channel 12 shot against the fiber sliding surface 7, from where they slide into the fiber collecting groove 6, there one Form fiber ring and in a known manner as yarn 14 in the axial direction of the shaft 3 subtracted from. The transport air sucked in via the fiber feed channel 12 can be supplied via a Drain overflow gap 15 on the open front side 9 of the spinning rotor 1.
  • the spun yarn 14 shown in dash-dot lines is first of all from the fiber collecting groove 6 at least approximately in a normal plane of the spinning rotor 1 and then via a yarn take-off channel 17 of a yarn take-off nozzle 18 according to FIG Deduction direction A is drawn off by means of a pair of draw rollers, not shown, and one also supplied winding package, not shown.
  • the Garnabzugskanal 17 is coaxial with Shaft 3 of the spinning rotor 1, so that the yarn 14 by means of the yarn take-off nozzle 18 by approximately 90 ° is deflected, the yarn 14 in the normal plane mentioned corresponding to the Direction of rotation B revolves like a crank, see also FIG. 2.
  • the yarn take-off nozzle 18 is by means of a External thread 20 screwed into a corresponding hole in the cover 10.
  • a funnel-shaped arched contact surface 21 which on a lying in the normal plane, in Essentially flat end face 19 begins.
  • the Contact surface 21 is an arcuate curved surface, which is directly the smallest cross section 22 of the yarn take-off channel 17 follows. In the illustrated axial section in FIG about a quarter circle with a radius of curvature that is, for example, 3 mm.
  • the contact surface 21 is provided with linear unevenness 23, 3 as notches 24 or according to FIG. 4 as bump-like projections can.
  • the invention relates specifically to the design of these bumps 23 with the The aim is to produce a good quality yarn 14 with high spinning stability of the open-end spinning device produce.
  • the linear unevenness 23 cross on it entire length of the yarn 14 to be drawn off at an acute crossing angle ⁇ , which is clear deviates from both 0 ° and 90 °.
  • adjacent bumps 23 are like this arranged close together that the yarn 14 always at least one bump 23, however preferably contacted several bumps 23 at the same time. This will in particular achieved that the withdrawn yarn 14 with the participation of the radius of the contact surface 21 to the Edges of the bumps 23 undergoes a certain wrap without, for example, in the Notch ground to be drawn into.
  • the crossing angle ⁇ is advantageously between 15 ° and 45 °.
  • the bumps 23, starting from the area of the yarn take-off channel 17, show the variant shown in Figure 2 in the direction of rotation B of the yarn 14th
  • the bumps 23 are formed as slightly curved curves, what leads to the fact that the crossing angle ⁇ remains constant at every point of an unevenness 23. In FIG. 5 shows a large number of such crossing angles ⁇ . It can also be seen that Adjacent bumps 23 are so close together that the yarn 14 is always contacted several bumps 23.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

An open-end spinning assembly has a curved funnel-shaped contact surface over which a thread is drawn. The surface has a flat end-face (19) translating over a convex (21) surface to a yarn withdrawal passage at 90 degrees to the end-face. The contact surface has linear grooves and ridges which cross the yarn (14) fibres at an acute angle over their entire length. Fibres are always in contact with adjacent grooves and ridges. The angle subtended between the fibres, grooves (23) and ridges is approx. constant. The grooves have a coarse helical pitch. The angle alpha at which the threads intersect the grooves is approx. constant and between 15 and 45. The angle of intersection is against the direction of yarn travel.

Description

Die Erfindung betrifft eine Garnabzugsdüse für Offenend-Spinnvorrichtungen, mit einer ein abzuziehendes Garn umlenkenden gewölbten Kontaktfläche, die von einer im Wesentlichen ebenen Stirnfläche in einen im Wesentlichen senkrecht dazu verlaufenden Garnabzugskanal übergeht, und mit in der Kontaktfläche angeordneten linienförmigen Unebenheiten, welche auf ihrer gesamten Länge das abzuziehende Garn unter einem spitzen Kreuzungswinkel kreuzen, der deutlich von 0° und 90° abweicht.The invention relates to a yarn take-off nozzle for open-end spinning devices, with a pulling yarn deflecting arched contact surface, which is essentially a flat end face in an essentially perpendicular yarn take-off channel passes over, and with linear unevenness arranged in the contact surface, which on cross the entire length of the yarn to be drawn off at an acute crossing angle, the deviates significantly from 0 ° and 90 °.

Unebenheiten dieser Art an Garnabzugsdüsen sind bekannt und können entweder als Kerben oder als höckerartige Vorsprünge ausgebildet sein. Üblicherweise in der Praxis verwendete derartige Unebenheiten verlaufen entweder radial zum Zentrum der Garnabzugsdüse oder aber spiralförmig dazu. Das Garn, welches um das Zentrum der Garnabzugsdüse kurbelartig rotiert, weist zu diesen Unebenheiten am Kreuzungspunkt einen Kreuzungswinkel von etwa 0° bei radialen Unebenheiten oder einen Kreuzungswinkel von annähernd 90° bei spiralförmigen Unebenheiten auf. Beispielhaft hierfür seien das US-Patent 3,965,661 für radiale Unebenheiten und die DE 37 07 526 A1 für spiralförmige Unebenheiten genannt. Dabei ist es auch bekannt (deutsche Auslegeschrift 21 40 157), an ein und derselben Garnabzugsdüse sowohl radiale als auch konzentrisch zum Zentrum angeordnete Unebenheiten in Form von Kerben vorzusehen.Bumps of this type on yarn take-off nozzles are known and can either be notches or be formed as bump-like projections. Such are commonly used in practice Bumps are either radial to the center of the yarn take-off nozzle or spiral to. The yarn, which rotates in a crank-like manner around the center of the yarn take-off nozzle, points toward the latter Bumps at the crossing point a crossing angle of about 0 ° with radial bumps or a crossing angle of approximately 90 ° for spiral bumps. exemplary for this purpose, the US Patent 3,965,661 for radial bumps and DE 37 07 526 A1 for called spiral bumps. It is also known (German interpretation 21 40 157), on the same yarn take-off nozzle both radial and concentric to the center Provide arranged bumps in the form of notches.

Durch die Figuren 9 und 10 der DE 15 60 302 C3 ist es darüber hinaus bekannt, die Kontaktflächen von Garnabzugsdüsen mit im Wesentlichen tangential zum Garnabzugskanal verlaufenden Kerben oder Rippen zu versehen. Dadurch werden die Unebenheiten unter einem spitzen Kreuzungswinkel gekreuzt, der deutlich von 0° oder 90° abweicht. Die vorliegende Erfindung geht deshalb im Oberbegriff von der letztgenannten Druckschrift aus. It is also known from FIGS. 9 and 10 of DE 15 60 302 C3 that Contact surfaces of yarn take-off nozzles with essentially tangential to the yarn take-off channel extending notches or ribs. This will make the bumps under one acute crossing angle crossed, which differs significantly from 0 ° or 90 °. The present The invention is therefore based on the last-mentioned document in the preamble.

Garnabzugsdüsen führen das ersponnene Garn vom Herzstück der Offenend-Spinnvorrichtung, dem so genannten Spinnrotor, nach außen. Die Ausbildung der Garnabzugsdüse selbst hat einen großen Einfluss auf die Qualität des ersponnenen Garnes und auf die Spinnstabilität der Offenend-Spinnvorrichtung. Die Ausgestaltung der Garnabzugsdüse bestimmt letztlich die Spinnbedingungen im Spinnrotor. Dies gilt insbesondere hinsichtlich der Garndrehung, die vom ersponnenen Garn bis in das Innere einer Fasersammelrille des Spinnrotors zurückläuft. Das Anbringen von Unebenheiten in Form von Kerben oder Vorsprüngen hat sich hier als geeignete Kompromisslösung erwiesen. Das abgezogene Garn erhält dadurch einen so genannten Falschdrall, der die Spinnstabilität erhöht und immer wieder periodisch unterbrochen wird, indem er von Zeit zu Zeit gewissermaßen "zurückspringt". Leider hat es sich jedoch gezeigt, dass eine Erhöhung der Spinnstabilität häufig mit einer Qualitätsverschlechterung der ersponnenen Garne einhergeht.Yarn take-off nozzles guide the spun yarn from the heart of the open-end spinning device, the so-called spinning rotor, to the outside. The formation of the yarn take-off nozzle itself has one great influence on the quality of the spun yarn and on the spinning stability of the open-end spinning device. The design of the yarn take-off nozzle ultimately determines the Spinning conditions in the spinning rotor. This is especially true with regard to the yarn twist made by the spun yarn runs back into the inside of a fiber collecting groove of the spinning rotor. The Applying bumps in the form of notches or projections has proven to be suitable here Compromise solution proven. The drawn yarn is given a so-called False twist, which increases the spinning stability and is periodically interrupted by he "jumps back" from time to time. Unfortunately, it has been shown that a Increasing the spinning stability often with a deterioration in the quality of the spun yarns accompanied.

Der Erfindung liegt die Aufgabe zu Grunde, eine die eingangs genannten Unebenheiten aufweisende Garnabzugsdüse zu schaffen, die so wohl hinsichtlich der Spinnstabilität als auch hinsichtlich der Garnqualität gute Eigenschaften aufweist.The invention is based on the object, one of the unevenness mentioned to have featured yarn take-off nozzle that as well in terms of spinning stability as well has good properties in terms of yarn quality.

Die Aufgabe wird dadurch gelöst, dass benachbarte Unebenheiten so dicht beieinander angeordnet sind, dass das Garn stets mindestens eine Unebenheit kontaktiert.The task is solved in that neighboring bumps are so close together are arranged so that the yarn always contacts at least one unevenness.

Mit den Merkmalen der Erfindung wird eine Garnabzugsdüse mit einer Kontaktfläche geschaffen, bei der sich der Falschdralleffekt zum Erhöhen der Spinnstabilität verstärkt, ohne dass Faserschädigungen auftreten, wie sie mit den in der Praxis bekannten gekerbten Garnabzugsdüsen bekannt sind. Auf Grund der Erfindungsmerkmale wird das Garn auf den Kanten der Unebenheiten kontinuierlich ziehend abgerollt. Der Verlauf der Unebenheiten gemäß der Erfindung garantiert, dass - bei Vorhandensein von als Kerben ausgebildeten Unebenheiten - das Garn nicht etwa in den Kerbgrund hineingezogen wird, sondern auf den Kerbkanten auf Grund des Radius der Kontaktfläche eine gewisse Umschlingung erfährt, welche die Falschdrallwirkung der Garnabzugsdüse verstärkt, ohne die Fasern zu schädigen.With the features of the invention, a yarn draw-off nozzle with a contact surface is created, in which the false twist effect increases to increase the spinning stability without Fiber damage occurs as with the notched ones known in practice Yarn take-off nozzles are known. Due to the features of the invention, the yarn is on the The edges of the bumps are continuously unrolled. The course of the bumps according to The invention guarantees that - in the presence of bumps formed as notches - the yarn is not pulled into the notch base, but on the notch edges at the bottom the radius of the contact surface undergoes a certain wrap, which the false twist effect of the yarn take-off nozzle without damaging the fibers.

Die genannten Unebenheiten sollten so angeordnet sein, dass der Kreuzungswinkel mit dem abzuziehenden Garn ständig zwischen 15° und 45° liegt. Dabei ist es besonders vorteilhaft, wenn der Kreuzungswinkel über die gesamte Länge der Unebenheiten wenigstens annähernd konstant ist. Dies erfordert für die erfindungsgemäß gestalteten Unebenheiten zwar eine leicht geschwungene Kurve, führt jedoch andererseits zu einer besonders kontinuierlichen Krafteinleitung.The bumps mentioned should be arranged so that the crossing angle with the yarn to be drawn is always between 15 ° and 45 °. It is particularly advantageous if the crossing angle is at least approximately constant over the entire length of the bumps is. For the bumps designed according to the invention, this requires a slight one curved curve, but on the other hand leads to a particularly continuous Force application.

Grundsätzlich gibt es für die Richtung des Kreuzungswinkels zwei Möglichkeiten: Ausgehend vom Bereich des Garnabzugskanals, können die Unebenheiten entweder in Umlaufrichtung des Garnes oder entgegen der Umlaufrichtung weisen.There are basically two options for the direction of the crossing angle: Starting from Area of the yarn take-off channel, the unevenness can either in the direction of the yarn or point in the opposite direction.

Weitere Vorteile und Merkmale der Erfindung ergeben sich aus der nachfolgenden Beschreibung einiger Ausführungsbeispiele.Further advantages and features of the invention result from the following description some embodiments.

Es zeigen:

  • Figur 1 in stark vergrößerter Darstellung einen Axialschnitt durch einen Teil einer Offenend-Spinnvorrichtung mit einer erfindungsgemäßen Garnabzugsdüse,
  • Figur 2 eine Ansicht in Richtung des Pfeiles II der Figur 1 auf die ebenfalls stark vergrößert dargestellte Garnabzugsdüse,
  • Figur 3 in noch weiter vergrößerter Darstellung einen Ausschnitt aus Figur 2 entsprechend der Schnittfläche III-III, wobei die dargestellte Unebenheit als Kerbe ausgebildet ist,
  • Figur 4 eine Darstellung ähnlich Figur 3, wobei die Unebenheit als höckerartiger Vorsprung ausgebildet ist,
  • Figur 5 in ebenfalls stark vergrößerter Darstellung eine diagrammähnliche Teilansicht der Figur 2 zwecks Erläuterung einer besonders vorteilhaften Variante nach der Erfindung.
  • Die in Figur 1 nur teilweise dargestellte Offenend-Spinnvorrichtung enthält einen Spinnrotor 1, der aus einem Rotorteller 2 und einem darin eingepressten Schaft 3 besteht. Der Schaft 3 ist in nicht dargestellter Weise gelagert und angetrieben.
  • Der Rotorteller 2 rotiert bei Betrieb in einer Unterdruckkammer 4, die durch ein Rotorgehäuse 5 gebildet ist, welches in nicht dargestellter Weise an eine Unterdruckquelle angeschlossen ist.
    • Show it:
  • 1 shows a greatly enlarged illustration of an axial section through part of an open-end spinning device with a yarn draw-off nozzle according to the invention,
  • FIG. 2 shows a view in the direction of arrow II in FIG. 1 onto the yarn take-off nozzle, which is also shown in a greatly enlarged form,
  • FIG. 3 shows a detail from FIG. 2 corresponding to the sectional area III-III in a further enlarged illustration, the unevenness shown being designed as a notch,
  • FIG. 4 shows an illustration similar to FIG. 3, the unevenness being designed as a bump-like projection,
  • Figure 5 is also a greatly enlarged representation of a diagrammatic partial view of Figure 2 for the purpose of explaining a particularly advantageous variant according to the invention.
  • The open-end spinning device shown only partially in FIG. 1 contains a spinning rotor 1, which consists of a rotor plate 2 and a shaft 3 pressed therein. The shaft 3 is mounted and driven in a manner not shown.
  • The rotor plate 2 rotates during operation in a vacuum chamber 4, which is formed by a rotor housing 5, which is connected to a vacuum source in a manner not shown.

    • Der Rotorteller 2 weist eine sich konisch zu einer Fasersammelrille 6 erweiternde Fasergleitfläche 7 auf. In der Fasersammelrille 6 hat der hohle Innenraum des Rotortellers 2 seinen größten Durchmesser. Der Spinnrotor 1 lässt sich durch eine vordere Öffnung 8 des Rotorgehäuses 5 zur Bedienungsseite hin herausziehen. Bei Betrieb ist die Öffnung 8 des Rotorgehäuses 5 zusammen mit der offenen Vorderseite 9 des Rotortellers 2 durch eine wegbewegbare Abdeckung 10 verschlossen. Die Abdeckung 10 legt sich unter Zwischenschaltung einer Ringdichtung 11 dann an das Rotorgehäuse 5 an.The rotor plate 2 has a fiber sliding surface which widens conically to form a fiber collecting groove 6 7 on. In the fiber collecting groove 6, the hollow interior of the rotor plate 2 has its largest Diameter. The spinning rotor 1 can be opened through a front opening 8 in the rotor housing 5 Pull out the operating side. In operation, the opening 8 of the rotor housing 5 is together with the open front 9 of the rotor plate 2 by a cover 10 which can be moved away locked. The cover 10 then puts on with the interposition of an annular seal 11 the rotor housing 5.

    Die Abdeckung 10 enthält einen außerhalb der Zeichenehene liegenden Faserzuführkanal 12, der in nicht dargestellter, weil bekannter Weise an einer Auflösewalze beginnt und dessen Mündung 13 gegen die Fasergleitfläche 7 gerichtet ist. Durch die Wirkung der genannten Unterdruckquelle werden bei Betrieb durch die Auflösewalze vereinzelte Fasern durch den Faserzuführkanal 12 gegen die Fasergleitfläche 7 geschossen, von wo sie in die Fasersammelrille 6 gleiten, dort einen Faserring bilden und in bekannter Weise als Garn 14 in axialer Richtung des Schaftes 3 abgezogen werden. Die über den Faserzuführkanal 12 angesaugte Transportluft kann über einen Überströmspalt 15 an der offenen Vorderseite 9 des Spinnrotors 1 abfließen.The cover 10 contains a fiber feed channel 12 which lies outside the drawing plane and which in a manner not shown, because in a known manner, begins at an opening roller and its mouth 13 is directed against the fiber sliding surface 7. Due to the effect of the mentioned vacuum source During operation, the fibers are separated by the opening roller through the fiber feed channel 12 shot against the fiber sliding surface 7, from where they slide into the fiber collecting groove 6, there one Form fiber ring and in a known manner as yarn 14 in the axial direction of the shaft 3 subtracted from. The transport air sucked in via the fiber feed channel 12 can be supplied via a Drain overflow gap 15 on the open front side 9 of the spinning rotor 1.

    Das ersponnene, strichpunktiert dargestellte Garn 14 wird zunächst aus der Fasersammelrille 6 wenigstens annähernd in einer zum Schaft 3 liegenden Normalebene des Spinnrotors 1 und anschließend über einen Garnabzugskanal 17 einer Garnabzugsdüse 18 gemäß der Abzugsrichtung A mittels eines nicht dargestellten Abzugswalzenpaares abgezogen und einer ebenfalls nicht dargestellten Auflaufspule zugeführt. Der Garnabzugskanal 17 liegt koaxial zum Schaft 3 des Spinnrotors 1, so dass das Garn 14 mittels der Garnabzugsdüse 18 um etwa 90° umgelenkt wird, wobei das Garn 14 in der genannten Normalebene entsprechend der Umlaufrichtung B kurbelartig umläuft, siehe auch Figur 2. Die Garnabzugsdüse 18 ist mittels eines Außengewindes 20 in eine entsprechende Bohrung der Abdeckung 10 eingeschraubt.The spun yarn 14 shown in dash-dot lines is first of all from the fiber collecting groove 6 at least approximately in a normal plane of the spinning rotor 1 and then via a yarn take-off channel 17 of a yarn take-off nozzle 18 according to FIG Deduction direction A is drawn off by means of a pair of draw rollers, not shown, and one also supplied winding package, not shown. The Garnabzugskanal 17 is coaxial with Shaft 3 of the spinning rotor 1, so that the yarn 14 by means of the yarn take-off nozzle 18 by approximately 90 ° is deflected, the yarn 14 in the normal plane mentioned corresponding to the Direction of rotation B revolves like a crank, see also FIG. 2. The yarn take-off nozzle 18 is by means of a External thread 20 screwed into a corresponding hole in the cover 10.

    Dem Umlenken des Garnes 14 aus der genannten Normalebene in den Garnabzugskanal 17 dient eine trichterförmige gewölbte Kontaktfläche 21, die an einer in der Normalebene liegenden, im Wesentlichen ebenen Stirnfläche 19 beginnt. In dem in Figur 1 dargestellten Axialschnitt ist die Kontaktfläche 21 eine kreisbogenartige gewölbte Fläche, der unmittelbar der kleinste Querschnitt 22 des Garnabzugskanals 17 folgt. Die Kontaktfläche 21 bildet in dem dargestellten Axialschnitt in etwa einen Viertelkreis mit einem Krümmungsradius, der beispielsweise 3 mm beträgt. The deflection of the yarn 14 from the normal plane mentioned is used in the yarn take-off channel 17 a funnel-shaped arched contact surface 21, which on a lying in the normal plane, in Essentially flat end face 19 begins. In the axial section shown in Figure 1 is the Contact surface 21 is an arcuate curved surface, which is directly the smallest cross section 22 of the yarn take-off channel 17 follows. In the illustrated axial section in FIG about a quarter circle with a radius of curvature that is, for example, 3 mm.

    In an sich bekannter Weise ist die Kontaktfläche 21 mit linienförmigen Unebenheiten 23 versehen, die gemäß Figur 3 als Kerben 24 oder gemäß Figur 4 als höckartige Vorsprünge ausgebildet sein können. Speziell auf die Ausgestaltung dieser Unebenheiten 23 bezieht sich die Erfindung mit dem Ziel, bei hoher Spinnstabilität der Offenend-Spinnvorrichtung ein qualitativ gutes Garn 14 zu erzeugen.In a manner known per se, the contact surface 21 is provided with linear unevenness 23, 3 as notches 24 or according to FIG. 4 as bump-like projections can. The invention relates specifically to the design of these bumps 23 with the The aim is to produce a good quality yarn 14 with high spinning stability of the open-end spinning device produce.

    Wie insbesondere aus Figur 2 ersichtlich ist, kreuzen die linienförmigen Unebenheiten 23 auf ihrer gesamten Länge das abzuziehende Garn 14 unter einem spitzen Kreuzungswinkel α, der deutlich sowohl von 0° als auch von 90° abweicht. Zusätzlich jedoch sind benachbarte Unebenheiten 23 so dicht beieinander angeordnet, dass das Garn 14 stets mindestens eine Unebenheit 23, jedoch vorzugsweise mehrere Unebenheiten 23 gleichzeitig kontaktiert. Dadurch wird insbesondere erreicht, dass das abgezogene Garn 14 unter Mitwirkung des Radius der Kontaktfläche 21 an den Kanten der Unebenheiten 23 eine gewisse Umschlingung erfährt, ohne beispielsweise in den Kerbengrund hineingezogen zu werden. Der Kreuzungswinkel α liegt dabei vorteilhaft zwischen 15° und 45°. Die Unebenheiten 23, ausgehend vom Bereich des Garnabzugskanals 17, weisen bei der in Figur 2 dargestellten Variante in Umlaufrichtung B des Garnes 14.As can be seen in particular from FIG. 2, the linear unevenness 23 cross on it entire length of the yarn 14 to be drawn off at an acute crossing angle α, which is clear deviates from both 0 ° and 90 °. In addition, however, adjacent bumps 23 are like this arranged close together that the yarn 14 always at least one bump 23, however preferably contacted several bumps 23 at the same time. This will in particular achieved that the withdrawn yarn 14 with the participation of the radius of the contact surface 21 to the Edges of the bumps 23 undergoes a certain wrap without, for example, in the Notch ground to be drawn into. The crossing angle α is advantageously between 15 ° and 45 °. The bumps 23, starting from the area of the yarn take-off channel 17, show the variant shown in Figure 2 in the direction of rotation B of the yarn 14th

    Es sei an dieser Stelle erwähnt, dass die Umlaufgeschwindigkeit B sehr viel größer ist als die Geschwindigkeit des Garnes 14 in Abzugsrichtung A.It should be mentioned at this point that the rotational speed B is much higher than that Speed of yarn 14 in take-off direction A.

    Anhand der diagrammartigen, stark vergrößert dargestellten Figur 5 wird nachfolgend eine Variante beschrieben, bei welcher der Kreuzungswinkel α über die gesamte Länge der Unebenheiten 23 wenigstens annähernd konstant ist. Zusätzlich ist, abweichend von Figur 2, vorgesehen, dass die Unebenheiten 23, ausgehend vom Bereich des Garnabzugskanals 17, entgegen der Umlaufrichtung B des Garnes 14 weisen.On the basis of the diagrammatic FIG. 5, shown in a greatly enlarged form, one is shown below Variant described, in which the crossing angle α over the entire length of the Bumps 23 is at least approximately constant. In addition, deviating from FIG. 2, provided that the unevenness 23, starting from the area of the yarn take-off channel 17, point against the direction of rotation B of the yarn 14.

    Zwischen den in Figur 5 erkennbaren beiden Viertelkreisen befindet sich die nur auszugsweise dargestellte Kontaktfläche 21, auf welcher lediglich drei linienförmige Unebenheiten, in Form von Kerben oder Vorsprüngen, dargestellt sind. Selbstverständlich ist die gesamte Kontaktfläche 21 mit solchen Unebenheiten 23 versehen. Man erkennt femer eine Momentaufnahme eines in Umlaufrichtung B umlaufenden, mit einer durchgezogenen Linie dargestellten Garnes 14, welches sich außerdem in Abzugsrichtung A bewegt. Strichpunktiert sind mit 14' und 14" zwei nachfolgende Momente des Garnes 14 dargestellt. Between the two quarter circles recognizable in FIG. 5, there is only an extract shown contact surface 21, on which only three linear bumps, in the form of Notches or protrusions are shown. Of course, the entire contact surface 21 is included provided such bumps 23. You can also see a snapshot of an in Circumferential direction B circumferential yarn 14 shown with a solid line, which also moves in trigger direction A. Dash-dotted are 14 'and 14 "two subsequent moments of the yarn 14 are shown.

    Man erkennt, dass die Unebenheiten 23 als leicht geschwungene Kurven ausgebildet sind, was dazu führt, dass an jeder Stelle einer Unebenheit 23 der Kreuzungswinkel α konstant bleibt. In Figur 5 ist hier eine Vielzahl solcher Kreuzungswinkel α angedeutet. Weiterhin ist erkennbar, dass benachbarte Unebenheiten 23 so dicht beieinander angeordnet sind, dass das Garn 14 stets mehrere Unebenheiten 23 kontaktiert.It can be seen that the bumps 23 are formed as slightly curved curves, what leads to the fact that the crossing angle α remains constant at every point of an unevenness 23. In FIG. 5 shows a large number of such crossing angles α. It can also be seen that Adjacent bumps 23 are so close together that the yarn 14 is always contacted several bumps 23.

    Claims (5)

    Garnabzugsdüse für Offenend-Spinnvorrichtungen, mit einer ein abzuziehendes Garn umlenkenden gewölbten Kontaktfläche, die von einer im Wesentlichen ebenen Stirnfläche in einen im Wesentlichen senkrecht dazu verlaufenden Garnabzugskanal übergeht, und mit in der Kontaktfläche angeordneten linienförmigen Unebenheiten, welche auf ihrer gesamten Länge das abzuziehende Garn unter einem spitzen Kreuzungswinkel kreuzen, der deutlich von 0° und 90° abweicht, dadurch gekennzeichnet, dass benachbarte Unebenheiten (23) so dicht beieinander angeordnet sind, dass das Garn (14) stets mindestens eine Unebenheit (23) kontaktiert.Yarn take-off nozzle for open-end spinning devices, with a curved contact surface deflecting a yarn to be drawn off, which merges from a substantially flat end face into a yarn take-off channel running essentially perpendicularly to it, and with linear unevenness arranged in the contact area, which underneath the yarn to be drawn off along its entire length intersect at an acute crossing angle that differs significantly from 0 ° and 90 °, characterized in that adjacent bumps (23) are arranged so close to one another that the yarn (14) always contacts at least one bump (23). Garnabzugsdüse nach Anspruch 1, dadurch gekennzeichnet, dass der Kreuzungswinkel (α) zwischen 15° und 45° beträgt.Yarn take-off nozzle according to claim 1, characterized in that the crossing angle (α) is between 15 ° and 45 °. Garnabzugdüse nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Kreuzungswinkel (α) über die gesamte Länge der Unebenheiten (23) wenigstens annähernd konstant ist.Yarn take-off nozzle according to claim 1 or 2, characterized in that the crossing angle (α) is at least approximately constant over the entire length of the unevenness (23). Garnabzugsdüse nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Unebenheiten (23), ausgehend vom Bereich des Garnabzugskanals (17), in Umlaufrichtung (B) des Garnes (14) weisen.Yarn take-off nozzle according to one of claims 1 to 3, characterized in that the unevenness (23), starting from the area of the yarn take-off channel (17), point in the circumferential direction (B) of the yarn (14). Garnabzugsdüse nach einem der Ansprüche 1 bis 3. dadurch gekennzeichnet, dass die Unebenheiten (23), ausgehend vom Bereich des Garnabzugskanals (17), entgegen der Umlaufrichtung (B) des Garnes (14) weisen.Yarn take-off nozzle according to one of Claims 1 to 3, characterized in that the unevenness (23), starting from the area of the yarn take-off channel (17), points counter to the direction of rotation (B) of the yarn (14).
    EP03009160A 2002-06-20 2003-04-19 Yarn draw-off nozzle for an open-end spinning machine Expired - Lifetime EP1375711B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10228504 2002-06-20
    DE10228504A DE10228504A1 (en) 2002-06-20 2002-06-20 Yarn take-off nozzle for open-end spinning devices

    Publications (3)

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    EP1375711A2 true EP1375711A2 (en) 2004-01-02
    EP1375711A3 EP1375711A3 (en) 2004-05-12
    EP1375711B1 EP1375711B1 (en) 2010-01-20

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP03009160A Expired - Lifetime EP1375711B1 (en) 2002-06-20 2003-04-19 Yarn draw-off nozzle for an open-end spinning machine

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    EP (1) EP1375711B1 (en)
    CN (1) CN1470691A (en)
    AT (1) ATE455883T1 (en)
    DE (1) DE10228504A1 (en)

    Families Citing this family (7)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE102004013828B4 (en) * 2004-03-15 2007-03-15 Wilhelm Stahlecker Gmbh Garnabzugsdüse for an open-end rotor spinning device
    DE102004036953B4 (en) * 2004-07-21 2012-11-08 Wilhelm Stahlecker Gmbh Garnabzugsdüse for an open-end rotor spinning device
    DE102011120106A1 (en) * 2011-12-02 2013-06-06 Oerlikon Textile Gmbh & Co. Kg Cover element of an open-end spinning device for closing an evacuated, forwardly open rotor housing
    DE102012108550A1 (en) * 2012-02-08 2013-08-08 Maschinenfabrik Rieter Ag Garnabzugseinheit a rotor spinning machine and method for producing a yarn using a rotor spinning machine
    CN102747470B (en) * 2012-07-12 2015-07-08 宁波双盾纺织帆布实业有限公司 Twisting prevention head
    CN106319696A (en) * 2016-11-15 2017-01-11 江苏普美纺织有限公司 Rotor spinning false twister
    CN106319697A (en) * 2016-11-15 2017-01-11 江苏普美纺织有限公司 Rotor spinning false twister

    Citations (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE1560302A1 (en) * 1966-08-24 1971-04-01 Schubert & Salzer Maschinen Sliver spinning device
    DE3707526A1 (en) * 1987-03-09 1988-09-29 Vnii Legkogo Textil Masch UNIT FOR RINGLESS SPINNING
    DE4224632A1 (en) * 1992-07-25 1994-01-27 Schlafhorst & Co W Open end rotor spinning unit - has yarn withdrawal passage from the rotor, with spirally shaped steps, at reducing angles
    DE19738382A1 (en) * 1997-09-03 1999-03-04 Schlafhorst & Co W Open end spinner yarn take off

    Patent Citations (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE1560302A1 (en) * 1966-08-24 1971-04-01 Schubert & Salzer Maschinen Sliver spinning device
    DE3707526A1 (en) * 1987-03-09 1988-09-29 Vnii Legkogo Textil Masch UNIT FOR RINGLESS SPINNING
    DE4224632A1 (en) * 1992-07-25 1994-01-27 Schlafhorst & Co W Open end rotor spinning unit - has yarn withdrawal passage from the rotor, with spirally shaped steps, at reducing angles
    DE19738382A1 (en) * 1997-09-03 1999-03-04 Schlafhorst & Co W Open end spinner yarn take off

    Also Published As

    Publication number Publication date
    EP1375711A3 (en) 2004-05-12
    DE10228504A1 (en) 2004-01-08
    EP1375711B1 (en) 2010-01-20
    CN1470691A (en) 2004-01-28
    ATE455883T1 (en) 2010-02-15

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