EP2947187A1 - Dispositif de fausse torsion pour un dispositif de filage à bout libre - Google Patents

Dispositif de fausse torsion pour un dispositif de filage à bout libre Download PDF

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Publication number
EP2947187A1
EP2947187A1 EP15168098.0A EP15168098A EP2947187A1 EP 2947187 A1 EP2947187 A1 EP 2947187A1 EP 15168098 A EP15168098 A EP 15168098A EP 2947187 A1 EP2947187 A1 EP 2947187A1
Authority
EP
European Patent Office
Prior art keywords
false twist
yarn
edges
false
open
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
EP15168098.0A
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German (de)
English (en)
Other versions
EP2947187B1 (fr
Inventor
Gerd Stahlecker
Siegfried Krohmer
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
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Publication date
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP2947187A1 publication Critical patent/EP2947187A1/fr
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Publication of EP2947187B1 publication Critical patent/EP2947187B1/fr
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Classifications

    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01HSPINNING OR TWISTING
    • D01H4/00Open-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
    • D01H4/40Removing running yarn from the yarn forming region, e.g. using tubes
    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01HSPINNING OR TWISTING
    • D01H7/00Spinning or twisting arrangements
    • D01H7/02Spinning or twisting arrangements for imparting permanent twist
    • D01H7/90Arrangements with two or more spinning or twisting devices of different types in combination

Definitions

  • the present invention relates to a false twist device for an open-end spinning device for introducing a false twist into a yarn produced in the open-end spinning device.
  • the false twist device has a substantially cylindrical body as well as a plurality of false twist edges disposed in the yarn withdrawal direction one behind the other and opposite the yarn withdrawal direction at an angle in the body.
  • the invention relates to an open-end spinning device with such a false twist device and a method for introducing a false twist into a yarn produced in an open-end spinning device of a rotor spinning machine.
  • the spinning rotor In the production of yarns in an open-end spinning apparatus of a rotor spinning machine, the spinning rotor is fed with staple fibers dissolved in individual fibers and withdrawn as a spun yarn having a twist via a yarn draw-off nozzle arranged centrally in the spinning rotor.
  • the individual fibers in the end of the already produced yarn which extends as a rotating yarn leg between the rotor groove and the Garnabzugsdüse, integrated and granted the yarn rotation.
  • the spinning stability of the open-end spinning device depends essentially on the rotation of the rotating yarn leg extending between the yarn draw-off nozzle and the rotor groove. A too low yarn twist always has a negative effect on the spinning stability.
  • the DE 40 39 755 A1 shows such Garnabzugs worn a rotor spinning machine, in which the Garnabzugsdüse is followed by a Garnumlenkstelle at which the yarn is withdrawn over obliquely to the yarn run false twist edges.
  • the false twist edges can have a substantially circular cross section, web-like or triangular. In this case, a greater false twist can be generated, the more sharp-edged the profile of the false twist edges. However, damage to the yarn surface may occur if the false twist edge is too sharp, so that in practice a compromise must always be made between introducing as much false twist as possible and avoiding damage to the yarn.
  • the generation of the false twist is further influenced by the wrap angle of the yarn with respect to the false twist edge.
  • the DE 87 02 807 U1 therefore proposes to arrange a further deflection or a further false twist edge, which is arranged opposite to the first false twist edge, and deflects the yarn in a direction deviating from the direction of the preceding deflection to one of the yarn withdrawal nozzles following the false twist edge.
  • the angle of wrap of the yarn at the first false twist edge can be increased and a lifting of the yarn from the false twist edge can be avoided.
  • the effect of the false twist edge can thereby be improved.
  • the introduction of the false twist is also influenced by the sharp edges of the false twist edges, so that here too the possibilities of introducing a false twist without damaging the yarn are limited.
  • the object of the present invention is therefore to enable improved false twist generation with only a small load of the yarn.
  • a false twist device for an open-end spinning device for introducing a false twist into a yarn produced in the open-end spinning device has a substantially tubular body and a plurality of false twist edges disposed in the yarn withdrawal direction one behind the other and opposite the yarn withdrawal direction at an angle in the body. It is envisaged that the plurality of false twist edges protrude into the interior of the tubular body in such a way that the yarn undergoes a deflection at each of the false twist edges. At the same time, the false twisted edges are arranged offset in the body in the circumferential direction such that the yarn additionally experiences a spatial, in particular helical deflection relative to its regular yarn withdrawal direction due to the successive deflections at the multiple false twist edges.
  • the false twist device is arranged downstream of a Garnabzugsdüse in an open-end spinning a rotor spinning machine in Garnabzugsraum to push back rotations as false twist in the direction of the spinning rotor.
  • the yarn is drawn off via a yarn take-off nozzle and drawn over false twist edges arranged in a false twist device downstream of the yarn take-off nozzle, whereby a false twist is imparted to the yarn. It is provided that the yarn is exposed by the false twist edges of a spatial, in particular helical deflection relative to its regular Garnabzugsraum, wherein the yarn is given an additional false twist.
  • the yarn is deflected in each case at defined, successive in the yarn path points of the false twist device by the arrangement of several false twist edges.
  • the yarn is given a torque by the deflection at the points defined by the false twist edges, since it undergoes a rotation or a corresponding spatial deflection due to the offset in the circumferential direction false twist edges by the sequence of deflections.
  • the false twist edges have a height that is greater than half the inner diameter of the body. In this way, both the wrap angle can be increased at the individual false twist edges and thus a higher false twist can be introduced, as well as a greater spatial deflection of the yarn can be achieved, which causes an additional false twist. It is advantageous if the false twist edges each have the same height. However, a spatial deflection of the yarn can also be achieved if the false twist edges have different heights, ie false twist edges are used, which protrude differently far into the interior of the false twist device.
  • the false twist device has at least three false twist edges, wherein the false twist edges are preferably offset from each other by a uniform offset angle in the circumferential direction.
  • This can be cheaper A helical deflection at the three or more false twist edges are generated and thereby the false twist are introduced into the yarn.
  • the uniform introduction of the false twist in the yarn is supported by the uniform offset angle. If three false twist edges are provided, then the false twist edges are preferably offset by an offset angle of 120 ° with respect to one another.
  • the false twist edges are arranged inclined at an inclination angle of 40 ° to 60 ° to the Garnabzugsraum. By such a tilt angle, a particularly high false twist can be generated.
  • the false twist edges are designed as insertable into the body of the false twist device webs.
  • the webs can be glued into a cylindrical or semi-cylindrical body, clipped or attached in any other way.
  • the entire false twist device with the tubular body and the false twist edges is designed as insertable into the open-end spinning device and preferably removable again from the open-end spinning device insert. This can in turn be glued into a corresponding housing or in a trigger channel of the open-end spinning device or used and attached in any other way.
  • the insert has a plurality of, preferably in the Garnabzugsraum successively arranged, preferably cylindrical or semi-cylindrical sections.
  • a false twist edge is preferably arranged in each of the sections.
  • Such a semi-cylindrical portion of the insert with a false twist edge can be produced in a cost effective manner as a molded part, since it is easily demolded due to its shape.
  • the various sections can also be produced as identical parts, which are then assembled to one another only by the offset angle relative to one another.
  • the sections each have at least one positioning element, by means of which they can be positioned in the circumferential direction by the offset angle relative to an adjacent section. With appropriate arrangement of the positioning elements, the sections can still be advantageously formed as equal parts.
  • the insert or the sections of the insert made of ceramic, metal or plastic.
  • the insert or its sections are designed as injection molded pieces. This allows a cheaper production of the false twist device.
  • the false twist device has a housing which surrounds the insert, preferably likewise a cylindrical or tubular housing. By receiving the individual sections in a tubular housing, these can be arranged interchangeable in a particularly simple manner and be easily replaced when worn.
  • the Garnabzugsdüse and the false twist device have a common, preferably removably arranged in the open-end spinning, housing.
  • the false twist device and the Garnabzugsdüse are executed in this case as a structural unit.
  • An axial fixation of the insert or the sections of the insert can also take place by means of the Garnabzugsdüse and / or by means of the housing.
  • a separate axial attachment of the sections with each other or the sections in the housing can be omitted hereby.
  • the false twist device is arranged in Garnabzugsraum preferably directly behind the Garnabzugsdüse.
  • the false twist device has a separate housing or is arranged separately from the Garnabzugsdüse in a trigger channel of the open-end spinning device.
  • the false-twist device is followed by a take-off tube and / or a further twist element.
  • the further deflection on the downstream swirl element it can be ensured that the yarn experiences a sufficient wrap angle at each of the successive false twist edges and that a lifting of the yarn from the false twist edge is prevented.
  • FIG. 1 shows a schematic side view of an open-end spinning device 1 of a rotor spinning machine 2.
  • the rotor spinning machine 2 includes a plurality of in the longitudinal direction of the spinning machine 2 juxtaposed jobs.
  • Each workstation usually contains a feed device 8, which supplies the open-end spinning device 1 with a fiber material 6 via a dissolving device 9, which dissolves the fiber material 6 into individual fibers.
  • the fiber material 6 is stored in storage containers 4 on the rotor spinning machine 2. That in single fibers dissolved fiber material 6 is finally the spinning rotor 3 of the open-end spinning device 1 via a fiber feed channel 5 (see FIG. 2 ).
  • the yarn 7 produced in the spinning rotor 3 is finally drawn off from the open-end spinning apparatus 1 via a draw-off device 10 and wound onto a bobbin 12 by means of a winding device 11.
  • the open-end spinning apparatus 1 is in the FIG. 2 shown in a schematic, sectional side view.
  • the open-end spinning apparatus 1 comprises a spinning rotor 3, whose rotor cup is arranged in a rotor housing 13.
  • the rotor housing 13 is usually acted upon by spinning vacuum and closed by a removable cover 14.
  • a seal 15 is provided between the rotor housing 13 and the cover 14, to maintain the pressure prevailing in the rotor housing 13 spinning negative pressure.
  • the lid 14 is still the already to FIG. 1 described fiber feed channel 5 is arranged, which is on the one hand with the opening device 9 in connection and the other end protrudes into the spinning rotor 3 in order to perform the fiber material 6 of the inner wall of the spinning rotor 3 can.
  • the individual fibers fed into the spinning rotor 3 are now transported into the rotor groove of the spinning rotor 3 due to the centrifugal force. There they get in contact with a circulating yarn leg 7a of the already produced yarn 7 and are incorporated into the yarn end 7a due to the rotation of the spinning rotor 3.
  • the yarn twist in the rotating yarn leg 7a located between the yarn draw-off nozzle 16 and the rotor groove is increased by means of a false twist device 17.
  • the yarn 7 produced in the spinning rotor 3 is finally drawn off through the take-off device 10 via a yarn withdrawal nozzle 16 likewise arranged in the cover 14 and via the false twist device 17 arranged downstream of the yarn withdrawal nozzle 16.
  • a withdrawal tube 18 is still arranged after the false twist device 17, which contains further false twist edges 19.
  • this is not essential.
  • the yarn 7 can be fed directly after its exit from the false twist device 17 without further deflection and without passing another swirl element of the trigger device 10.
  • the false twist edges 19 are arranged not only in the yarn withdrawal direction G one behind the other, but at the same time offset in the circumferential direction in the body 20 of the false twist device 17 are arranged. In this way, a spatial deflection of the yarn 7 can be achieved, which in addition to the rotation displacement by the false twist edges 19 gives the yarn a further rotation, which in turn is propagated as a false twist in the region of the rotor groove.
  • FIG. 3 shows such a false twist device 17 in a schematic representation.
  • the regular Garnabzugscardi G is in FIG. 3 represented by a dash-dotted line.
  • the false twist edges 19 are offset not only in Garnabzugsplatz G successively, but at the same time in the circumferential direction of the false twist device 17 and the body 20 of the false twist device 17 offset in the body 20 and protrude into the garnmodeden inner cross section or interior 21st the false twist device 17, so that the yarn 7 is a spatial deflection relative to the regular Garnabzugsplatz G learns.
  • the yarn path of the deflected yarn 7 is shown by a dotted line.
  • the yarn 7 is deflected at each of the false twist edges 19 by an amount e of the regular Garnabzugsraum G. Due to the helical staircase-like arrangement of the false twist edges 19, the yarn 7 experiences a helical deflection, which imposes an additional torque on the yarn 7. It is particularly advantageous if, as shown here, the false twist edges 19 are offset from one another in the circumferential direction by a uniform offset angle. For example, in the case of three false twist edges 19, as shown here, the false twist edges 19 can be rotated by 120 ° to each other. However, it is not absolutely necessary to distribute false twist edges 19 to exactly 360 ° of the circumferential direction.
  • the desired spatial deflection of the yarn 7 can also be achieved with several false twist edges 19 or fewer false twist edges 19, wherein it is not absolutely necessary, the false twist edges 19 at regular intervals with respect to the Garnabzugsplatz G or with regular offset angles with respect to the To arrange circumferential direction.
  • the resulting by the arrangement of false twist edges 19 spatial deflection or helix of the yarn 7 can be oriented both to the right and to the left with respect to Garnabzugscardi G. With Z-wire in the yarn, the helix is clockwise in the yarn withdrawal direction.
  • FIG. 4 shows a first embodiment of a false twist device 17, which is designed as an existing of several sections 22 insert 23.
  • the false twist device 17 or the insert 23 in the present case consists of three substantially semi-cylindrical sections 22, wherein in each of the sections 22 a false twist edge 19 is arranged.
  • the false twist edges 19 preferably have an angle ⁇ of 40 ° to 60 ° to the Garnabzugsraum G. By this inclination of the false twist edges 19, in turn, the injectable false twist can be further increased.
  • the individual sections 22 are now each rotated by an offset angle to each other and in Garnabzugscardi G in succession to the insert 23 composed.
  • one or more cams 24 are arranged on each of the sections 22, which in turn interact with corresponding recesses 25 of adjacent sections 22.
  • the cams 24 and the recesses 25 thus form positioning elements, by means of which the individual sections 22 can be positioned relative to one another in the circumferential direction.
  • the individual sections 22 of the false twist device 17 are thereby connected in a form-fitting manner in the circumferential direction and secured against rotation.
  • FIG. 6 shows a detailed view of such a single section 22 with a false twist edge 19. Like the FIG. 6 can be removed, due to the shape as a semi-cylindrical shell with the false twist edge 19 disposed therein, such a portion 22 in a favorable manner as an injection molded piece produced because the shape allows easy removal from the mold.
  • Such a false twisting device 17 constructed from individual sections 22 preferably also has a housing 26 surrounding the insert 23 or the individual sections 22 of the insert 23. It can be provided to insert the insert 23 with its surrounding housing 26 in the open-end spinning device. However, it is also conceivable, the insert 23 and the individual portions 22 of the insert 23 directly into a flue channel of the open-end spinning device 1, for example, in the cover member 14 (see FIG. 2 ) can be designed to use.
  • the false twist device 17 and the Garnabzugsdüse 16 are arranged in a common housing 26.
  • the false twist device 17 is thus directly downstream of the Garnabzugsdüse 16 in this case, so that the torque generated by the false twist device 17 directly supporting one already By the Garnabzugsdüse 16 generated false twist acts.
  • the individual sections 22 of the insert 23 may additionally be fastened to one another, for example glued together.
  • FIG. 5 Removable, while the false twist edges 19 have a height H, which is greater than half the inner diameter of the body I 20, so that in this way a good spatial deflection of the yarn 7 can be generated.
  • a unit comprising a Garnabzugsdüse 16 and a false twist device 17 can be easily removed from the open-end spinning device 1 and the Garnabzugsdüse 16 and the false twist edges 19 and the insert 23 can be easily replaced.
  • the invention is not limited to the illustrated embodiments.
  • the false twist device 17 could have a cylindrical body 20, in whose cylindrical surface formed as webs or pins formed as false twist edges 19 from the side.
  • the false twist device 17, such as in the Figures 2 and 5 shown coaxially with Garnabzugsdüse 16 and directly downstream of Garnabzugsdüse 16 to arrange.
  • the false twist device 17 may also be provided at an angle to the Garnabzugsdüse 16.
  • numerous variations are possible with respect to the number and arrangement of the false twist edges 19 within the false twist device 17.
  • the false twist device 17 may further comprise an inlet region or outlet region, which constitutes a further yarn deflection. Further modifications and combinations within the scope of the claims also fall under the invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
EP15168098.0A 2014-05-21 2015-05-19 Dispositif de fausse torsion pour un dispositif de filage a bout libre Active EP2947187B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014107181.6A DE102014107181A1 (de) 2014-05-21 2014-05-21 Falschdrallvorrichtung für eine Offenendspinnvorrichtung

Publications (2)

Publication Number Publication Date
EP2947187A1 true EP2947187A1 (fr) 2015-11-25
EP2947187B1 EP2947187B1 (fr) 2019-08-07

Family

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Family Applications (1)

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EP15168098.0A Active EP2947187B1 (fr) 2014-05-21 2015-05-19 Dispositif de fausse torsion pour un dispositif de filage a bout libre

Country Status (5)

Country Link
US (1) US9580841B2 (fr)
EP (1) EP2947187B1 (fr)
CN (1) CN105088434B (fr)
DE (1) DE102014107181A1 (fr)
TW (1) TWI612191B (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014119380A1 (de) * 2014-12-22 2016-06-23 Rieter Ingolstadt Gmbh Rotorspinnmaschine mit einer Vielzahl von Arbeitsstellen und einer Absaugeinrichtung
USD827682S1 (en) * 2016-12-02 2018-09-04 Carpet Industry Clearinghouse, Inc. False twist block assembly
DE102020118327A1 (de) * 2020-07-10 2022-01-13 Maschinenfabrik Rieter Ag Verfahren und Vorrichtung zur Falschdrahteinleitung sowie Spinnmaschine
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

Citations (6)

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Publication number Priority date Publication date Assignee Title
JPS489744U (fr) * 1971-06-11 1973-02-02
JPS5045438U (fr) * 1974-07-09 1975-05-07
JPS5113563Y1 (fr) * 1969-08-05 1976-04-12
JPS5291922A (en) * 1976-01-26 1977-08-02 Toray Industries Method of open end spinning
DE8702807U1 (de) 1986-03-19 1987-05-27 Stahlecker, Fritz, 7347 Bad Überkingen Vorrichtung zum OE-Spinnen
DE4039755A1 (de) 1990-12-13 1992-06-17 Schlafhorst & Co W Garnabzugseinrichtung einer oe-rotorspinnvorrichtung

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Publication number Priority date Publication date Assignee Title
JPS5113563Y1 (fr) * 1969-08-05 1976-04-12
JPS489744U (fr) * 1971-06-11 1973-02-02
JPS5045438U (fr) * 1974-07-09 1975-05-07
JPS5291922A (en) * 1976-01-26 1977-08-02 Toray Industries Method of open end spinning
DE8702807U1 (de) 1986-03-19 1987-05-27 Stahlecker, Fritz, 7347 Bad Überkingen Vorrichtung zum OE-Spinnen
DE4039755A1 (de) 1990-12-13 1992-06-17 Schlafhorst & Co W Garnabzugseinrichtung einer oe-rotorspinnvorrichtung

Also Published As

Publication number Publication date
US20150337463A1 (en) 2015-11-26
TWI612191B (zh) 2018-01-21
EP2947187B1 (fr) 2019-08-07
CN105088434A (zh) 2015-11-25
US9580841B2 (en) 2017-02-28
CN105088434B (zh) 2019-08-23
TW201600664A (zh) 2016-01-01
DE102014107181A1 (de) 2015-11-26

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