EP3371353A1 - Buse de sortie de fil à rainures s'étendant radialement au trou de buse - Google Patents

Buse de sortie de fil à rainures s'étendant radialement au trou de buse

Info

Publication number
EP3371353A1
EP3371353A1 EP16790971.2A EP16790971A EP3371353A1 EP 3371353 A1 EP3371353 A1 EP 3371353A1 EP 16790971 A EP16790971 A EP 16790971A EP 3371353 A1 EP3371353 A1 EP 3371353A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
notch
yarn
wall
inlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP16790971.2A
Other languages
German (de)
English (en)
Other versions
EP3371353B1 (fr
Inventor
Günter BAUR
Michael Basting
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.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
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 Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP3371353A1 publication Critical patent/EP3371353A1/fr
Application granted granted Critical
Publication of EP3371353B1 publication Critical patent/EP3371353B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • 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
    • 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
    • D01H4/04—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 imparting twist by contact of fibres with a running surface
    • D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor
    • D01H4/10—Rotors

Definitions

  • the present invention relates to a yarn draw-off nozzle for an open-end rotor spinning device having an inlet-side nozzle funnel and an outlet-side nozzle bore adjoining the nozzle funnel.
  • notches extending essentially radially to the nozzle bore are arranged, which have an inlet wall and a baffle wall as well as a notch inlet which is located radially on the outside and a notch outlet which is located radially inside.
  • Thread withdrawal nozzles have become known in the prior art in open-end rotor spinning devices in many designs. Such yarn withdrawal nozzles have the task of redirecting the spun yarn during removal from the spinning device and the withdrawn yarn a
  • the spinning stability can be substantially increased by introducing a false twist by means of the yarn draw-off nozzle.
  • the yarn draw-off nozzles have surface structures which have basically proven to improve the spinning stability, but at the same time also have a considerable influence on the quality of the spun yarn. Predominantly come as surface structures spiral elevations or radially arranged notches used. In general, spiral nozzles are considered to be advantageous for the yarn quality, but often offer less spin stability. Cone nozzles, on the other hand, are well suited for increasing spin stability, but are considered more aggressive in yarn quality.
  • DE 199 06 1 1 1 A1 proposes a yarn draw-off nozzle with notches arranged radially in the region of the nozzle funnel, the notches being configured asymmetrically.
  • the asymmetric notch is designed such that the thread initially runs smoothly over a very flat inlet wall into the notch base where it is then abruptly stopped by the steep baffle.
  • a yarn withdrawal nozzle is provided with radially extending, asymmetrical notches, which are curved in a sickle-shaped manner.
  • the curvature of the notches is executed contrary to the curvature of the crank-like circumferential yarn.
  • the object of the present invention is to propose a yarn draw-off nozzle which enables high spinning stability and nevertheless reduces negative influences on the yarn quality.
  • a yarn withdrawal nozzle for an open-end rotor spinning device has an inlet-side nozzle funnel and an outlet-side nozzle bore adjoining the nozzle funnel.
  • the nozzle funnel In the region of the nozzle funnel extending notches extending substantially radially to the nozzle bore, wherein the notches an inlet wall and a baffle wall and a Having radially outer notch inlet and a radially inner notch outlet.
  • a preferably flat, scored groove bottom is arranged between the inlet wall of the notch and the baffle wall. The inlet wall and the baffle wall thus do not abut each other directly in the region of the notch base, which was often rounded in the prior art.
  • the notch bottom has a width between 0.16 mm and 0.22 mm, in particular between 0.18 mm and 0.20 mm.
  • the thread can be braked gently as it passes over the notch bottom and slide in the direction of the baffle. The thread is thus securely and over a longer period of the effect of the notch exposed, at the same time the yarn damaging effect of the notches is reduced. It has been found that, with such a width of the notch bottom, an optimal compromise can be achieved between the spinnability enhancing effect of the notches on the one hand and the yarn quality on the other hand.
  • the notches have a flatter inlet wall and a steeper baffle wall. The skipping of the notches through the thread can thereby also be avoided and the thread is safely passed to him briefly restrained baffle.
  • the notch outlet is arranged in an input region of the nozzle bore.
  • the notch thus extends into the nozzle bore and is characterized comparatively steep.
  • the thread can be better in enter the notches and thus experiences a particularly significant change in length in the circumferential yarn leg.
  • the change in length and therefore also the thread tension tip produced by the notch are greater, the steeper the notch. Due to the steeper outlet of the notches in the nozzle bore while a smoother transition when reaching and leaving the notch is achieved at the same time, so that negative influences of the notches on the yarn quality can be avoided.
  • the notch outlet is arranged at a depth of between 0.1 mm and 0.5 mm away from an inlet of the nozzle bore.
  • the thread can be guided particularly securely into the notches and a steep notch is achieved. Since the notch also considered in the withdrawal direction in the direction of the nozzle bore offset from the nozzle funnel, it is further achieved that the slidably circulating yarn less than previously sweeps over the notch inlet. This also helps to avoid skipping the thread. Likewise, this reduces a yarn-damaging effect of the notch intake and improves the yarn quality.
  • the nozzle funnel in the region of the notch enemas has a circumferential recess, in particular a circumferential, preferably rounded, groove.
  • the recess can be directly adjacent to the notch enemas; It is also possible that an upper area of the notches with the original notch inlets is removed through the recess and thus new notches which now lie deeper in the nozzle funnel emerge at the transition of the cutout to the notch.
  • the recess itself can extend to the end face of the nozzle funnel or even interrupt the surface of the nozzle funnel. By such a recess, an aggressive effect of the notch run on the thread can be further reduced.
  • the recess instead of a circumferential groove, it is also possible to form the recess, for example by a spherical recess. It is furthermore advantageous if the inlet wall and / or the baffle wall are constructed as flat surfaces, ie without curves. Preferably, the notch bottom between the baffle wall and the inlet wall is formed as a flat surface. The thread is thereby defined defined within the notch over its entire length and the production of the thread take-off nozzle is facilitated.
  • inlet wall and / or the baffle wall are bent and / or bent, then a gentler thread treatment can take place in this way than in the case of an uncurved surface.
  • the kinked or curved surface shortens the steep surface and continues through a flatter surface to the top of the nozzle.
  • an angle of the baffle to a Kerbm ittelebene between 32.5 ° and 47.5 °, preferably between 35 ° and 45 °, more preferably between 37 ° and 42 °.
  • the baffle is thus made comparatively flat.
  • the release of the thread after its deceleration by the baffle can also be done gently and an undefined jumping of the thread can also be avoided.
  • a first angle ( ⁇ i) of a first part of the inlet wall and / or the baffle wall to a notch central plane between 32.5 ° and 47.5 °, preferably between 35 ° and 45 °, more preferably between 37 ° and 42 ° and a second angle (ß2) of a second part of the inlet wall (8) and / or the baffle (9) to the first part between 10 ° and 20 °, preferably between 13 ° and 17 °.
  • ß2 second angle
  • the angle of the inlet wall to a notch center plane between 50 ° and 65 °, preferably between 52 ° and 60 °, more preferably between 54 ° and 58 °.
  • the notch angle between the inlet wall and the baffle wall is thus advantageously between 80 ° and 15 °, preferably between 85 ° and 110 ° and more preferably between 96 ° and 100 °. Such values have been found to be optimal for guiding the thread securely into the notch while still gently decelerating.
  • the depth of the notch is preferably between 0.14 mm and 0.25 mm, preferably between 0.16 mm and 0.22 mm and particularly preferably between 0.16 and 0.20 mm ,
  • FIG. 1 shows a schematic representation of an open-end spinning device with a spinning rotor and a take-off nozzle
  • FIG. 2 shows a schematic illustration of a notch of a yarn withdrawal nozzle with a notch bottom
  • FIG. 3 is a schematic sectional view of a yarn withdrawal nozzle with a notch outlet in the input region of the nozzle bore, FIG.
  • FIG. 4 is a schematic sectional view of a yarn withdrawal nozzle with a circumferential recess
  • FIG. 5 is a schematic sectional view of a further yarn withdrawal nozzle with a peripheral recess
  • FIG. Figure 6 is a plan view of a yarn withdrawal nozzle with notches, as well
  • FIG. 7 shows a further embodiment of a yarn draw-off nozzle with a bent baffle wall.
  • FIG. 1 shows a schematic sectional view of a spinning rotor 2 and a yarn draw-off nozzle 1 in an open-end spinning device, which is only partly shown here.
  • the spinning rotor 2 is supplied in a known manner with a fiber material dissolved in individual fibers.
  • the spinning rotor 2 runs during the yarn production at high speeds, so that the supplied fibers are stored in the form of a fiber ring in the rotor groove 3 of the spinning rotor 2.
  • the newly spun yarn F is withdrawn continuously via the yarn withdrawal 1 and extends with its end into the rotor groove 3 of the spinning rotor 2. Due to the rotation of the spinning rotor 2 thus creates a crank-like circumferential yarn legs, in which the stored in the rotor groove 3 fibers are involved ,
  • the yarn withdrawal 1 has in the usual way a cylindrical nozzle bore 6 and a nozzle funnel 5, which forms a curved Garnumlenk Structure for deducting thread F.
  • the end face 16 of the yarn withdrawal nozzle 1 adjoins the nozzle funnel 5 on the side of the yarn withdrawal nozzle 1 facing away from the nozzle bore 6, which may be designed to be sloping in a different manner, for example flat, curved, or even in the direction of the head diameter D K of the yarn draw-off nozzle 1
  • the nozzle bore 6 is usually coaxial with the axis of rotation 15 of the spinning rotor 2, so that the withdrawn thread F is deflected during its withdrawal from the rotor groove 3 via the deflection of the nozzle funnel 5 by about 90 °.
  • the rotation introduced into the thread propagate as far as possible into the rotor groove 3 in order to achieve the best possible spinning stability.
  • the surface of the nozzle funnel 5 is for this purpose with notches 7 (see Figure 2) or surveys provided. Although these structures increase the spinning stability, they can also impair the yarn quality, in particular in the case of notches.
  • FIG. 2 shows a schematic section through a notch 7 of a yarn draw-off nozzle 1 with which a particularly good and reliable effect of the notch 7 on the drawn yarn F can be ensured.
  • the notch 7 in this case has, in a manner known per se, an inlet wall 8 and a baffle 9 which the thread F reaches in succession through the nozzle funnel 5 during its curvy circulation. The direction of rotation of the thread F is symbolized here by an arrow.
  • notch shapes of the prior art which were always executed V-shaped, but now provided that the inlet wall 8 and the baffle 9 are not directly adjacent, but a defined notch bottom 12 with a defined width B between the inlet wall. 8 and the baffle 9 extends.
  • the notch bottom 12 is present completely flat.
  • the notch 7 thus has a simple geometric structure, which is easy to manufacture.
  • the arrangement of the notch bottom 12 between the inlet wall 8 and the baffle 9 ensures that the thread F in each case reaches the notch base, which is here designed as a flat notch bottom 12.
  • An undefined jumping of the thread F from the inlet wall 8 directly on the baffle 9, as it often occurred in the prior art, can be avoided thereby. It is thus ensured that the thread F reaches the notch bottom 12 and thereby undergoes a sufficient change in length in the rotating yarn leg 15.
  • the secure reaching of the notch bottom 12 is still supported according to the present illustration in that the thread F is passed over a comparatively flat inlet wall 8 slowly and gently in the direction of the notch bottom 12.
  • the angle ⁇ to a notch center plane 14 or to a parallel thereto is preferably between 54 ° and 58 ° and is for example, executed at 56 °.
  • the notch bottom 12 further has a width B between 0.18 mm and 0.24 mm.
  • the width B of the notch bottom is 0.22 mm.
  • the angle ⁇ of the baffle 9 to the notch center plane 14, however, is preferably between 37 ° and 42 °. According to a particularly advantageous embodiment, the angle ⁇ is 40 °.
  • the thread F can indeed be braked in a desirable manner in a particularly advantageous manner, but still gently be led out of the notch 7 again.
  • a notch angle ⁇ + ß between the inlet wall 8 and the baffle 9 for example, 96 °.
  • the depth T of the notch 7 is between 0.16 mm and 0.20 mm.
  • the depth T is 0.18 mm.
  • the notch shape shown thus not only contributes to improving the spinning stability, but also to improving the yarn quality.
  • FIG. 3 shows, in a schematic sectional illustration, a yarn draw-off nozzle 1, in which the notches 7 (in the present case two notches 7 can be seen opposite one another) extend into the nozzle bore 6.
  • the notch outlet 1 1 which is defined here by the exit-side intersection or the exit-side intersection of the notch bottom 12 with the inner surface of the thread take-off 1, at a distance A between 0.1 mm and 0.5 mm is located.
  • the distance A is 0.25 mm.
  • the entrance of the nozzle bore 6 is defined as the beginning of the constant inner cross section of the yarn draw-off nozzle 1.
  • the yarn draw-off nozzle 1 in the region of the nozzle funnel 5 has an ever-changing inner cross-section.
  • the inlet of the nozzle bore 6 is thus defined by the tangential edge shown here.
  • the notches 7 are thus in a position in which the thread F is no longer pressed so strongly onto the surface of the nozzle funnel 5.
  • a Such comparatively steep notch 7 thus has a positive effect on the yarn quality due to the fact that the circumferential yarn leg 4 sweeps less strongly over the notch inlet 10 and is also advantageous for spinning stability.
  • the notch inlet 10 is in turn defined in the case of conventional V-shaped notches by the common intersection of the inlet wall 8 and the baffle 9 with the inner surface of the nozzle funnel 5 or in the present case by the input-side cut line of the notch bottom 12 with the inner surface of the nozzle funnel.
  • FIG. 4 shows a further embodiment of a yarn draw-off nozzle 1, in which the yarn-damaging effect of the notch inlet 10 is defused by a peripheral recess 13, in this case a circumferential groove 13a.
  • the circumferential groove 13a preferably has a radius Ri between 0.15 mm and 0.3 mm and in the present case is designed so that it only interrupts the surface of the nozzle funnel 5.
  • the circumferential groove 13a could also be designed so that it extends into the end face 16 of the yarn draw-off nozzle 1.
  • the notch inlets 10 and the comparatively sharp transition between the curved surface of the nozzle funnel 5 and the notch 7 can thereby be made more gentle.
  • FIG. 5 shows another embodiment of a yarn draw-off nozzle 1, in which the notch enemas 10 were defused by a spherical recess 13b.
  • the radius R2 of the spherical recess 13b is preferably adapted to the inner diameter Di of the nozzle bore 6 and is between 0.7 and 0.9 * Di * d i.
  • the radius R2 is 0.8 * D
  • FIG. 6 also shows a plan view of a yarn draw-off nozzle 1 with the notch 7 described with a defined notch bottom 12.
  • the arrow in turn shows the direction of rotation of the circulating yarn leg 4. Recognizable are still the flatter inlet wall 8 and In the present case, a total of four notches 7 are distributed uniformly over the circumference, but also an embodiment with only three notches 7 or more than four notches 7 would be possible.
  • a notch 7 is shown, in which the baffle 9 is formed kinked.
  • the notch bottom 12 facing the first part of the baffle 9 is inclined at an angle ßi to the notch center plane 14.
  • the edge of the yarn withdrawal nozzle 1 facing the second part of the baffle 9 is formed flat and has a second angle ß 2 .

Landscapes

  • 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

L'invention concerne une buse de sortie de fil (1), destinée à un dispositif de filage à rotor à bout ouvert, comprenant un cône de buse (5) du côté de l'entrée et un trou de buse (6), du côté de la sortie, qui se raccorde au cône de buse (5) ainsi que des rainures (7) disposées dans la zone du cône de buse (5) et s'étendant sensiblement radialement par rapport au trou de buse (6). Les rainures comportent une paroi d'entrée (8) et une paroi de rebond (9) ainsi qu'une entrée de rainure radialement extérieure (10) et une sortie de rainure radialement intérieure (11). Un fond de rainure (12) de forme bidimensionnelle, de préférence plane, est formé entre la paroi d'entrée (8) et la paroi de rebond (9).
EP16790971.2A 2015-11-06 2016-11-02 Buse de sortie de fil à rainures s'étendant radialement au trou de buse Active EP3371353B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015119112.1A DE102015119112A1 (de) 2015-11-06 2015-11-06 Fadenabzugsdüse mit radial zur Düsenbohrung verlaufenden Kerben
PCT/EP2016/076323 WO2017076847A1 (fr) 2015-11-06 2016-11-02 Buse de sortie de fil à rainures s'étendant radialement au trou de buse

Publications (2)

Publication Number Publication Date
EP3371353A1 true EP3371353A1 (fr) 2018-09-12
EP3371353B1 EP3371353B1 (fr) 2020-04-15

Family

ID=57233437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16790971.2A Active EP3371353B1 (fr) 2015-11-06 2016-11-02 Buse de sortie de fil à rainures s'étendant radialement au trou de buse

Country Status (5)

Country Link
US (1) US10767284B2 (fr)
EP (1) EP3371353B1 (fr)
CN (1) CN108350612B (fr)
DE (1) DE102015119112A1 (fr)
WO (1) WO2017076847A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015119114A1 (de) * 2015-11-06 2017-05-11 Maschinenfabrik Rieter Ag Fadenabzugsdüse
US20210146406A1 (en) * 2019-11-18 2021-05-20 Ford Global Technologies, Llc Cleaning apparatus for sensor
DE102020133359A1 (de) 2020-12-14 2022-06-15 Saurer Spinning Solutions Gmbh & Co. Kg Multifunktionsdüse für eine Spinnmaschine
DE102022114064A1 (de) 2022-06-03 2023-12-14 Saurer Spinning Solutions Gmbh & Co. Kg Fadenabzugsdüse sowie Offenend-Spinnvorrichtung mit einer Fadenabzugsdüse

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DE1806054A1 (de) * 1968-10-30 1970-10-08 Schubert & Salzer Maschinen Verfahren und Vorrichtung zum Verspinnen eines Faserbandes
CS160258B1 (fr) * 1971-03-05 1975-03-28
DE2140157B2 (de) * 1971-08-11 1973-11-29 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt Fadenabzugsrohr für eine Offen-End-Spinnvorrichtung
JPS49132329A (fr) * 1973-04-21 1974-12-19
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GB1503991A (en) * 1975-05-22 1978-03-15 Toyoda Automatic Loom Works Thread guides of open-end spinning units
DE2544721A1 (de) * 1975-10-07 1977-04-14 Feldmuehle Anlagen Prod Vorrichtung zum verspinnen
JPS54125735A (en) * 1978-03-20 1979-09-29 Toyoda Automatic Loom Works Rotary spinning chamber in opennend spinning frame
DE3323988A1 (de) * 1983-07-02 1985-01-03 Fritz 7347 Bad Überkingen Stahlecker Vorrichtung zum oe-friktionsspinnen
DE3344741A1 (de) * 1983-12-10 1985-06-20 W. Schlafhorst & Co, 4050 Mönchengladbach Fadenabzugsduese fuer eine offenend-rotor-spinnmaschine
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US5265406A (en) * 1990-03-09 1993-11-30 Schubert & Salzer Maschinenfabrik Ag Open-end spinning device
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DE19906111A1 (de) 1999-02-13 2000-10-05 Felix Backmeister Faden-Abzugsdüse in einer Open-End-Spinnmaschine
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DE102016109687A1 (de) * 2016-05-25 2017-11-30 Rieter Ingolstadt Gmbh Fadenabzugsdüse für eine Offenendspinnvorrichtung

Also Published As

Publication number Publication date
EP3371353B1 (fr) 2020-04-15
US10767284B2 (en) 2020-09-08
WO2017076847A1 (fr) 2017-05-11
CN108350612B (zh) 2021-09-10
US20180320292A1 (en) 2018-11-08
DE102015119112A1 (de) 2017-05-11
CN108350612A (zh) 2018-07-31

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