EP3889327A1 - Élément de torsion pour une filière d'un métier à filer à jet d'air, ainsi que poste de travail d'un métier à filer à jet d'air - Google Patents

Élément de torsion pour une filière d'un métier à filer à jet d'air, ainsi que poste de travail d'un métier à filer à jet d'air Download PDF

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Publication number
EP3889327A1
EP3889327A1 EP21166694.6A EP21166694A EP3889327A1 EP 3889327 A1 EP3889327 A1 EP 3889327A1 EP 21166694 A EP21166694 A EP 21166694A EP 3889327 A1 EP3889327 A1 EP 3889327A1
Authority
EP
European Patent Office
Prior art keywords
fiber guide
yarn
curvature
fiber
spinneret
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
EP21166694.6A
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German (de)
English (en)
Other versions
EP3889327B1 (fr
Inventor
Simon-Moritz Funke
Petr Haska
Evzen Pilar
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 EP3889327A1 publication Critical patent/EP3889327A1/fr
Application granted granted Critical
Publication of EP3889327B1 publication Critical patent/EP3889327B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/11—Spinning by false-twisting
    • D01H1/115—Spinning by false-twisting using pneumatic means
    • 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
    • D01H4/02—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 a fluid, e.g. air vortex

Definitions

  • the present invention relates to a swirl element for a spinneret of an air-jet spinning machine, wherein the swirl element has a base body and a fiber guide element, and wherein the base body and / or the fiber guide element has a fiber guide channel with an inlet opening and an outlet opening for a fiber structure, wherein the fiber guide channel is designed, to guide the fiber structure during a spinning process in a transport direction from the inlet opening to the outlet opening, and wherein the fiber guide channel is designed to guide a yarn against the transport direction via the inlet opening from the spinneret as part of a piecing process.
  • the invention also relates to a work station of an air-jet spinning machine with a spinneret.
  • Generic spinnerets with corresponding swirl elements are known in the prior art and are used to produce a yarn from an elongated fiber structure with the aid of a vortex air flow generated by air nozzles within a vortex chamber of the spinneret.
  • the outer fibers of the fiber structure are wound around the inner fibers (core fibers) in the area of the inlet opening of the usually spindle-shaped yarn-forming element, so that the result is a yarn that is finally drawn off from the swirl chamber via the take-off channel of the yarn-forming element and with the help of a winding device can be wound onto a tube.
  • the end of the yarn is then picked up by an operator, a service robot or a device fixed at the work site and prepared for the subsequent overlap with the fiber structure. Because of the limited installation space between the spinneret and the drafting system, the end of the yarn is mostly deflected essentially perpendicular to the transport direction.
  • a spinning machine with a corresponding twisting device is from the DE 697 07 197 T2 known.
  • the disadvantage of this is that there is an increased risk of yarn damage due to the vertical deflection of the yarn on the twisting device. Furthermore, an increased space requirement between the drafting device and the twisting device is necessary for the deflection of the yarn from the twisting device.
  • the object of the present invention is therefore to create a twist element and a work station for an air-jet spinning machine which reduces the risk of yarn damage during the piecing process.
  • a swirl element is proposed for a spinneret of an air-jet spinning machine, the swirl element having a base body and a fiber guide element, and the base body and / or the fiber guide element having a fiber guide channel with an inlet opening and an outlet opening for a fiber structure.
  • the fiber guide channel is designed to guide the fiber structure during a spinning process in a transport direction from the inlet opening to the outlet opening.
  • the fiber guide channel is designed to guide a yarn in the context of a piecing process against the transport direction via the inlet opening from the spinneret.
  • a yarn is at least temporarily guided out of the spinneret against the transport direction via the inlet opening.
  • the regular operation of the air-jet spinning machine i.e. the production of a yarn from the fiber structure with the aid of the spinneret, is referred to as the spinning process.
  • the piecing process refers to the operation for re-spinning the yarn after an interruption in the spinning process.
  • the base body and / or the fiber guide element have at least one curvature at the inlet opening.
  • the curvature can generally be understood as a curvature of the surface.
  • an edge that is created by two surfaces at an angle to one another can be smoothed.
  • the gentle deflection of the yarn along the curve has the advantage that the friction between the yarn and the twist element is reduced. This also minimizes the risk of yarn damage.
  • constant contact of the yarn on the twist element can be achieved during the deflection. This leads to a smaller space requirement for the yarn when it is deflected.
  • the at least one curvature is a rounding, in particular with a radius of 0.5 mm to 10 mm.
  • a rounding is usually the gentlest form of deflecting a yarn, as this results in the least amount of friction and therefore a very low risk of yarn damage.
  • the at least one curvature has an angle of curvature of 60 ° to 180 °, advantageously of 90 ° to 120 °.
  • the angle of curvature is the angle spanned by two straight lines, which each lead from the center point to one of the end points of the curvature. The greater the angle of curvature, the longer the curvature and the further the yarn can be deflected.
  • the fiber guiding channel has a fiber guiding contour, in particular with a fiber guiding surface and an inlet ramp, and a delimiting contour opposite the fiber guiding contour, the curvature being arranged on the fiber guiding surface, the inlet ramp and / or the delimiting contour.
  • the guide contour advantageously has the guide surface for guiding the fiber structure and the inlet ramp for preventing a fiber sliver jam upon entry, the guide surface and the inlet ramp are preferably connected to one another via an inlet edge. It is advantageous here if, when the yarn is deflected in the direction of the fiber guide contour, the at least one curvature is arranged at the entry edge, that is, between the guide surface and the inlet ramp. If the yarn is deflected in the direction of the delimiting contour, the curvature is advantageously arranged on the delimiting contour.
  • the fiber guide channel is arranged laterally offset with respect to a longitudinal axis of the spinneret, the contour of the fiber guide channel on the outside relative to the longitudinal axis having the curvature.
  • the longitudinal axis of the spinneret is the axis in which the Yarn is withdrawn from the spinneret. If the base body of the swirl element is rotationally symmetrical, the longitudinal axis of the spinneret is advantageously also the axis of rotation of the swirl element.
  • the outer contour can be either the fiber guiding contour or the delimiting contour of the fiber guiding channel.
  • the fiber guide element and / or the base body has a fiber guide sleeve at the inlet opening, the curvature being arranged at least in part on the fiber guide sleeve.
  • the fiber guide sleeve can be connected to the fiber guide element and / or the base body in a fixed or detachable manner. This allows the position of the curvature and thus the deflection to be changed. The angle of curvature and / or the radius of the rounding can also be increased by the fiber guide sleeve. This also has the advantage that the fiber guide sleeve and thus the curvature can be removed if necessary.
  • the fiber guide sleeve completely encloses the inlet opening of the fiber guide channel.
  • the fastening of the fiber guide sleeve on the fiber guide element and / or on the base body can be simplified.
  • a shift in the curvature can be realized in this way.
  • the base body and / or the fiber guide element and / or the fiber guide sleeve has a guide groove at the inlet opening, the curvature being arranged on the guide groove.
  • the guide groove guides the yarn through the curve when it is deflected. This prevents the yarn from sliding away from the curvature, in particular to the side.
  • the guide groove has the advantage that the position of the deflection, in particular closer to the outlet opening of the swirl element, can be shifted.
  • the guide groove is V-shaped, opening against the direction of transport.
  • the V-shaped design makes it easier to introduce the yarn into the guide groove.
  • the V-shaped guide groove can be designed in such a way that the yarn is braked during the piecing process by means of contact friction. In this way, the yarn tension can additionally or alternatively be increased.
  • the base body and / or the fiber guide element has a braking section for braking the yarn during the piecing process, the braking section preferably being arranged in the area of the curvature and / or adjoining it.
  • a braking section is to be understood as a section in the base body and / or in the fiber guiding element which brakes the yarn during the piecing process, in particular through contact friction.
  • the yarn is often loaded with piecing tension by external means, in particular by a drafting device upstream of the twisting element, in order to ensure easier piecing.
  • the braking section can increase the piecing tension and thereby simplify the piecing process.
  • the braking section is designed in a meandering shape, in particular as a meandering valley, at the curvature.
  • a meandering design is to be understood as a series of at least two arcs. If the yarn runs within the meander-shaped braking section during the piecing process, the yarn undergoes multiple changes of direction in its course.
  • As a meandering valley on the Curvature is to be understood as a meander-shaped depression on the curvature. This depression can additionally have a valley base radius which is preferably greater than the yarn radius and in which the yarn runs when it is deflected. The yarn can be gently deflected by means of the curvature and gently braked by means of the meander-shaped braking section, thereby increasing the piecing tension.
  • the spinneret has a swirl element according to the preceding and / or following description, wherein the features mentioned can be present individually or in any combination.
  • the work station has an intermediate store for picking up and deflecting the yarn in a storage direction over the at least one curve.
  • the intermediate storage is advantageously a suction unit which can be delivered to the work station or is an integral part of the same and with the aid of which the yarn end can be sucked in in the area of the outlet opening of the swirl element.
  • the intermediate storage device can additionally have means for yarn end preparation.
  • the transport direction spans a deflection angle with the storage direction, the curvature angle being greater than or equal to the deflection angle. This ensures that the yarn always rests on the curve during the deflection and thus a gentle deflection takes place.
  • the meander shape of the braking section extends in such a way that the yarn is deflected at an angle to the storage direction within the braking section during the piecing process and is thus braked.
  • Figure 1 shows a schematic side view of a work station 1 of an air-jet spinning machine during the spinning process, the air-jet spinning machine generally comprising several work stations 1 arranged one behind the other perpendicular to the plane of the drawing and preferably constructed in the same way.
  • a Drafting device 2 which is supplied in a transport direction T with a fiber structure 3, for example in the form of a doubled drafting sliver presented in a spinning can (not shown).
  • the work station 1 shown has a spinneret 4 with a swirl element 5 at a distance from the drafting system 2.
  • the twist element 5 has a base body 6 and a fiber guide element 7, the base body 6 and / or the fiber guide element 7 having a fiber guide channel 8 with an inlet opening 9 and an outlet opening 10 for the fiber structure 3.
  • the spinneret 4 is shown in section here.
  • the fiber structure 3 or at least some of the fibers of the fiber structure 3 are provided with a twist in a known manner in order to produce a yarn 12.
  • the rotation is created here by a targeted air flow in the region of the tip of a yarn forming element 13, the air flow being generated by air nozzles 14 opening preferably tangentially into the swirl chamber 11.
  • the workstation 1 shown further comprises a take-off device 15 formed by, for example, a pair of take-off rollers and a winding device 17, which is connected downstream of the pair of take-off rollers and has a replaceable bobbin 16.
  • the winding device 17 is used to wind up the yarn 12 emerging from the spinneret 4 in the transport direction T, which the The vortex chamber 11 exits via a take-off channel 18 running inside the yarn forming element 13.
  • the air-jet spinning machine has a yarn monitoring unit 19 which monitors defined parameters of the yarn 12 (for example the yarn thickness, the yarn tenacity or other parameters representative of the quality of the yarn 12).
  • the fiber structure feed is interrupted during yarn production, a yarn break between the spinneret 4 and the Winding device 17 or a deliberate interruption of the spinning process because the yarn 12 produced by the spinneret 4 does not meet the requirements, a piecing process is necessary after the interruption.
  • the interruption takes place here by reducing the conveying speeds of the drafting system 2, the take-off device 15 and / or the winding device 17. The reduction does not have to take place simultaneously or continuously. In any case, however, the respective conveying speeds should be throttled in such a way that the stable spinning process collapses if the conveying speeds fall below defined limit values and thus no more yarn 12 is produced from the fiber structure 3 from a certain point in time. At this point in time, the yarn production is finally interrupted, during which the yarn 12 detaches from the fiber structure 3 without a separate application of force.
  • a resulting bobbin-side yarn end 20 (see Figure 2 ) is located after the interruption in an area between the take-off device 15 and the spinneret 4 and is guided from here counter to the transport direction T through the take-off channel 18 and the fiber guide channel 8 from the inlet opening 9. It is at this point in the piecing process of the in Figure 1 The embodiment shown in the spinning process is in Figure 2 shown.
  • An intermediate storage device 21 arranged at the work station 1 picks up the yarn end 20 at the inlet opening 9 and deflects the yarn 12 in a storage direction S.
  • the picking up and deflection is advantageously carried out by means of negative pressure.
  • the intermediate store 21 can have means for yarn end preparation.
  • the storage direction S can, as shown in the present exemplary embodiment, run transversely to an axis of rotation D of one of the rollers of the drafting system 2. In the exemplary embodiment shown, the axis of rotation D thus runs perpendicular to the plane of the sheet.
  • the storage direction S can run parallel or in the direction of the axis of rotation D of one of the rollers of the drafting system 2.
  • the base body 6 and the fiber guide element 7 have a curvature 22, in particular a rounding with a radius between 0.5 mm and 10 mm, for the gentle deflection of the yarn 12.
  • This curvature 22 can be arranged in the base body 6, in the fiber guide element 7 or, as shown here, overlapping in the base body 6 and in the fiber guide element 7.
  • the at least one curve 22 is arranged on the twist element 5 in such a way that the yarn 12 runs over the at least one curve 22 when it is picked up and deflected in the storage direction S. If the storage direction S thus runs transversely to the axis of rotation D, as shown here, the curvature 22 is arranged transversely to the axis of rotation D on the swirl element 5. If the storage direction S runs alternatively in the direction of the axis of rotation D, the curvature 22 is arranged on the swirl element 5 in the direction of the axis of rotation D. The piecing process can then be completed by introducing the yarn end 20 together with the fiber structure 3 into the spinneret 4 and superimposing it in a controlled manner.
  • Figure 3a shows a schematic side view of a sectioned spinneret 4 according to an embodiment.
  • the spinneret 4 and not the entire work station 1 is shown here.
  • the spinneret 4 from the Figures 1 and 2 can, however, by the embodiment of Figure 3a be replaced.
  • the yarn 12 is only indicated in its course in the context of the piecing process.
  • the fiber guide channel 8 has a fiber guide contour 24, advantageously an inlet ramp and an adjoining fiber guide surface.
  • the inlet ramp and the fiber guide surface are connected to one another via an entry edge 27.
  • the curvature 22 is arranged on the delimiting contour 25 of the fiber guiding channel 8 opposite the fiber guiding contour 24.
  • the curvature 22 extends in contrast to that in FIGS Figures 1 and 2
  • the fiber guide channel 8 is arranged laterally offset to a longitudinal axis L of the spinneret 4, the outer contour of the fiber guide channel 8 in relation to the longitudinal axis L, which is the delimiting contour 25 here, having the curvature 22.
  • FIG 3b is a schematic side view of a sectioned spinneret 4 according to an alternative embodiment.
  • two curvatures 22 are arranged here on the fiber guide contour 24, one of the curvatures 22 being arranged on the leading edge 27.
  • the fiber guide contour 24 is the inner contour of the fiber guide channel 8 in relation to the longitudinal axis L.
  • the two curvatures 22 are each formed as a rounding with a radius of 0.5 mm to 10 mm.
  • the exemplary embodiment shown here can also be used at workstation 1 according to FIGS Figures 1 and 2 be arranged.
  • Figure 4a shows a schematic side view of a cut swirl element 5 according to a further embodiment.
  • the Figure 4b shows a schematic front view of the swirl element 5 according to the embodiment of FIG Figure 4a .
  • the swirl element 5 from the Figures 1 , 2 , 3a and 3b can, however, by the embodiment of Figures 4a and 4b be replaced.
  • the yarn 12 is only indicated in its course in the context of the piecing process.
  • the base body 6 and the fiber guide element 7 of the swirl element 5 have an overlapping curvature 22.
  • the curvature 22 can also be arranged here in the base body 6 and / or in the fiber guide element 7.
  • the curvature 22 here has an angle of curvature K in the range from 60 ° to 180 °, advantageously from 90 ° to 120 °.
  • the angle of curvature K is the angle spanned by two straight lines which each lead from the center point to one of the end points of the curvature 22. The greater the angle of curvature K, the longer the curvature 22 and the further the yarn 12 can thus also be deflected.
  • This angle of curvature K should advantageously, as shown here, be greater than a deflection angle U, which spans between the transport direction T and the storage direction S. As a result, the yarn 12 can always rest on the curve 22 during the deflection and thus a gentle deflection can take place.
  • a guide groove 23 is arranged at the inlet opening 9 of the swirl element 5.
  • the guide groove 23 can advantageously be V-shaped.
  • the V-shaped design makes it easier to introduce the yarn 12 into the guide groove 23 during the piecing process.
  • This guide groove 23 has the additional advantage that the curvature 22 in the transport direction T can be moved closer to the outlet opening 10 of the fiber guide channel 8. If the spinneret 4 is in a job 1, as in the Figures 1 and 2 As shown, arranged, the distance from the yarn 12 deflected in the storage direction S to the drafting device 2 can be increased by such a guide groove 23.
  • Figure 5 is a schematic side view of a cut swirl element 5 according to a further embodiment. Similar to the Figures 4a and 4b is only that here for reasons of clarity Swirl element 5 is shown. The swirl element 5 from the Figures 1 , 2 , 3a and 3b can, however, by the embodiment of Figure 5 be replaced. For a clearer representation, the yarn 12 is only indicated in its course in the context of the piecing process.
  • the exemplary embodiment in FIG Figure 5 a fiber guide sleeve 26.
  • the fiber guide sleeve 26 is arranged on the fiber guide element 7 and / or on the base body 6 and completely encloses the inlet opening 9 of the fiber guide channel 8.
  • the fiber guide sleeve 26 can be connected to the fiber guide element 7 and / or the base body 6 in a fixed or detachable manner.
  • the curvature 22 is only arranged on the fiber guide sleeve 26 here.
  • the curvature 22 has the angle of curvature Kauf, which in the present exemplary embodiment, in particular due to the fiber guide sleeve 26, is in the higher range of 60 ° to 180 °.
  • the curvature 22 in the transport direction T can be moved closer to the outlet opening 10 of the fiber guide channel 8.
  • the deflection can be designed in such a way that the yarn 12, as shown here, has a very large deflection angle U.
  • the curvature 22 it is possible for the curvature 22 to extend over the base body 6 and / or the fiber guide element 7. Furthermore, a guide groove 23 similar to the exemplary embodiment of FIG Figures 4a and 4b to be available.
  • Figure 6 shows a section VI of the swirl element 5 from Figure 4a . It thus shows a view from below in the transport direction T of the swirl element 5.
  • the swirl element 5 is shown for better clarity.
  • the swirl element 5 from the Figures 1 , 2 , 3a and 3b can however by the embodiment of Figures 4a, 4b and 6th be replaced.
  • the yarn 12 is shown as a solid line in its course as part of the piecing process. The yarn 12 is thus at the time shown, as in FIG Figure 4a shown, deflected in storage direction S.
  • the guide groove 23 is also V-shaped in FIG. 6.
  • the curvature 22 is arranged at the base of the guide groove 23.
  • the base body 6 and the fiber guide element 7 have a braking section 28 in the region of the curvature 22.
  • the braking section 28 is introduced into the curvature 22 as a meandering valley.
  • the meandering arcs of the braking section 28 run obliquely to the storage direction S, as shown here.
  • the yarn 12 within the braking section 28 can be deflected obliquely to the storage direction S and braked by contact friction on the meandering arcs.
  • the braking section 28 it is possible for the braking section 28 to extend over the base body 6 and / or the fiber guide element 7 and / or the fiber guide sleeve 26, which are shown in FIG Figure 5 is shown extends. Furthermore, the braking section 28 could be arranged on the V-shaped guide groove 23 so that the yarn 12 rests against the flanks of the guide groove 23 when it is deflected.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP21166694.6A 2020-04-02 2021-04-01 Poste de travail d'un métier à filer à jet d'air Active EP3889327B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020109170.2A DE102020109170A1 (de) 2020-04-02 2020-04-02 Drallelement für eine Spinndüse einer Luftspinnmaschine sowie Arbeitsstelle einer Luftspinnmaschine

Publications (2)

Publication Number Publication Date
EP3889327A1 true EP3889327A1 (fr) 2021-10-06
EP3889327B1 EP3889327B1 (fr) 2023-10-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP21166694.6A Active EP3889327B1 (fr) 2020-04-02 2021-04-01 Poste de travail d'un métier à filer à jet d'air

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Country Link
EP (1) EP3889327B1 (fr)
CN (1) CN113493950A (fr)
DE (1) DE102020109170A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0389178U (fr) * 1989-12-26 1991-09-11
DE69707197T2 (de) 1996-05-16 2002-06-20 Murata Machinery Ltd Anspinnverfahren und -vorrichtung für eine Spinnmaschine
DE10258719A1 (de) * 2002-12-09 2004-06-24 Wilhelm Stahlecker Gmbh Vorrichtung zum Herstellen eines gesponnenen Fadens
EP3243941A1 (fr) * 2016-04-29 2017-11-15 SAVIO MACCHINE TESSILI S.r.l. Métier à filer du type air-jet

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008006379A1 (de) 2008-01-29 2009-07-30 Oerlikon Textile Gmbh & Co. Kg Luftspinnvorrichtung
DE102012101039A1 (de) 2012-02-09 2013-08-14 Maschinenfabrik Rieter Ag Luftspinnmaschine mit separaten Spinn- und Anspinndüsen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0389178U (fr) * 1989-12-26 1991-09-11
DE69707197T2 (de) 1996-05-16 2002-06-20 Murata Machinery Ltd Anspinnverfahren und -vorrichtung für eine Spinnmaschine
DE10258719A1 (de) * 2002-12-09 2004-06-24 Wilhelm Stahlecker Gmbh Vorrichtung zum Herstellen eines gesponnenen Fadens
EP3243941A1 (fr) * 2016-04-29 2017-11-15 SAVIO MACCHINE TESSILI S.r.l. Métier à filer du type air-jet

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Publication number Publication date
DE102020109170A1 (de) 2021-10-07
CN113493950A (zh) 2021-10-12
EP3889327B1 (fr) 2023-10-25

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