EP3889327A1 - Swirl element for a spinneret of an air spinning machine and spinneret of an air spinning machine - Google Patents
Swirl element for a spinneret of an air spinning machine and spinneret of an air spinning machine Download PDFInfo
- 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
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- European Patent Office
- Prior art keywords
- fiber guide
- yarn
- curvature
- fiber
- spinneret
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- 238000009987 spinning Methods 0.000 title claims abstract description 22
- 239000000835 fiber Substances 0.000 claims abstract description 135
- 238000000034 method Methods 0.000 claims abstract description 30
- 230000008569 process Effects 0.000 claims abstract description 30
- 238000010042 air jet spinning Methods 0.000 claims abstract description 16
- 238000003860 storage Methods 0.000 claims description 18
- 238000012432 intermediate storage Methods 0.000 claims description 4
- 238000004804 winding Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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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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Abstract
Die Erfindung betrifft ein Drallelement (5) für eine Spinndüse (4) einer Luftspinnmaschine, wobei das Drallelement (5) einen Grundkörper (6) und ein Faserführungselement (7) aufweist, und wobei der Grundkörper (6) und/oder das Faserführungselement (7) einen Faserführungskanal (8) mit einer Eintrittsöffnung (9) und einer Austrittsöffnung (10) für einen Faserverband (3) aufweist, wobei der Faserführungskanal (8) ausgebildet ist, den Faserverband (3) während eines Spinnvorgangs in einer Transportrichtung (T) von der Eintrittsöffnung (9) zur Austrittsöffnung (10) zu führen, und wobei der Faserführungskanal (8) ausgebildet ist, ein Garn (12) im Rahmen eines Anspinnvorgangs entgegen der Transportrichtung (T) über die Eintrittsöffnung (9) aus der Spinndüse (4) zu führen. Der Grundkörper (6) und/oder das Faserführungselement (7) weist an der Eintrittsöffnung (9) wenigstens eine Krümmung (22) auf, zum sanften Umlenken des Garns (12) während des Anspinnvorgangs. Ferner betrifft die Erfindung eine Arbeitsstelle (1) einer Luftspinnmaschine mit einer Spinndüse (4). The invention relates to a swirl element (5) for a spinneret (4) of an air-jet spinning machine, the swirl element (5) having a base body (6) and a fiber guide element (7), and the base body (6) and / or the fiber guide element (7) ) has a fiber guide channel (8) with an inlet opening (9) and an outlet opening (10) for a fiber structure (3), the fiber guide channel (8) being designed to carry the fiber structure (3) in a transport direction (T) of during a spinning process the inlet opening (9) to the outlet opening (10), and wherein the fiber guide channel (8) is designed to take a yarn (12) during a piecing process against the transport direction (T) via the inlet opening (9) from the spinneret (4) respectively. The base body (6) and / or the fiber guiding element (7) has at least one curve (22) at the inlet opening (9) to gently deflect the yarn (12) during the piecing process. The invention also relates to a work station (1) of an air-jet spinning machine with a spinneret (4).
Description
Die vorliegende Erfindung betrifft ein Drallelement für eine Spinndüse einer Luftspinnmaschine, wobei das Drallelement einen Grundkörper und ein Faserführungselement aufweist, und wobei der Grundkörper und/oder das Faserführungselement einen Faserführungskanal mit einer Eintrittsöffnung und einer Austrittsöffnung für einen Faserverband aufweist, wobei der Faserführungskanal ausgebildet ist, den Faserverband während eines Spinnvorgangs in einer Transportrichtung von der Eintrittsöffnung zur Austrittsöffnung zu führen, und wobei der Faserführungskanal ausgebildet ist, im Rahmen eines Anspinnvorgangs ein Garn entgegen der Transportrichtung über die Eintrittsöffnung aus der Spinndüse zu führen. Ferner betrifft die Erfindung eine Arbeitsstelle einer Luftspinnmaschine mit einer Spinndüse.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.
Gattungsgemäße Spinndüsen mit entsprechenden Drallelementen sind im Stand der Technik bekannt und dienen der Herstellung eines Garns aus einem länglichen Faserverband mit Hilfe einer durch Luftdüsen innerhalb einer Wirbelkammer der Spinndüse erzeugten Wirbelluftströmung. Die äußeren Fasern des Faserverbands werden hierbei im Bereich der Eintrittsöffnung des in der Regel spindelförmigen Garnbildungselements um die innenliegenden Fasern (Kernfasern) gewunden, so dass im Ergebnis ein Garn entsteht, welches schließlich über den Abzugskanal des Garnbildungselements aus der Wirbelkammer abgezogen und mit Hilfe einer Spulvorrichtung auf eine Hülse aufgespult werden kann.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.
Kommt es während der Garnherstellung zu einer Unterbrechung der Faserverbandzuführung, zu einem Garnriss zwischen der Spinndüse und der Spulvorrichtung oder zu einer gewollten Unterbrechung des Spinnvorgangs, weil das von der Spinndüse hergestellte Garn nicht den Vorgaben entspricht, so ist nach der Unterbrechung ein Anspinnvorgang nötig.If there is an interruption in the fiber structure feed during yarn production, a yarn break between the spinneret and the winding device or a deliberate interruption of the spinning process because the yarn produced by the spinning nozzle does not meet the specifications, a piecing process is necessary after the interruption.
In diesem Zusammenhang ist bekannt, das Garnende, das sich nach der Unterbrechung der Garnherstellung innerhalb der Spinndüse, zwischen der Spinndüse und der Spulvorrichtung bzw. der dort gehaltenen Garnspule oder auf der Oberfläche der Garnspule befindet, entgegen der eigentlichen Transportrichtung durch die Spinndüse zurückzuführen. Das Garnende wird hierbei beispielsweise durch eine innerhalb des Abzugskanals erzeugte Luftströmung durch den Abzugskanal und schließlich durch die Eintrittsöffnung des Faserführungselements der Spinndüse in einen Bereich zwischen der Spinndüse und dem der Spinndüse vorgeschalteten Streckwerk transportiert.In this context, it is known to return the yarn end, which is located after the interruption of yarn production inside the spinneret, between the spinneret and the winding device or the yarn bobbin held there or on the surface of the yarn bobbin, against the actual transport direction through the spinneret. The end of the yarn is transported, for example, by an air flow generated within the take-off channel through the take-off channel and finally through the inlet opening of the fiber guide element of the spinneret into an area between the spinneret and the drafting device upstream of the spinneret.
In dem Bereich zwischen der Spinndüse und dem Streckwerk wird das Garnende anschließend von einer Bedienperson, einem Serviceroboter oder einer an der Arbeitsstelle fixierten Vorrichtung erfasst und für die anschließende Überlappung mit dem Faserverband vorbereitet. Wegen des begrenzten Bauraums zwischen der Spinndüse und dem Streckwerk wird das Garnende meist im Wesentlichen senkrecht zur Transportrichtung ausgelenkt.In the area between the spinneret and the drafting system, 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.
Eine Spinnmaschine mit einer entsprechenden Drallvorrichtung ist aus der
Aufgabe der vorliegenden Erfindung ist es somit, ein Drallelement sowie eine Arbeitsstelle einer Luftspinnmaschine zu schaffen, welches das Risiko von Garnschäden beim Anspinnvorgang reduziert.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.
Die Aufgabe wird gelöst durch ein Drallelement und eine Arbeitsstelle einer Luftspinnmaschine mit den Merkmalen der unabhängigen Patentansprüche. Vorgeschlagen wird ein Drallelement für eine Spinndüse einer Luftspinnmaschine, wobei das Drallelement einen Grundkörper und ein Faserführungselement aufweist, und wobei der Grundkörper und/oder das Faserführungselement einen Faserführungskanal mit einer Eintrittsöffnung und einer Austrittsöffnung für einen Faserverband aufweist. Der Faserführungskanal ist ausgebildet, den Faserverband während eines Spinnvorgangs in einer Transportrichtung von der Eintrittsöffnung zur Austrittsöffnung zu führen. Ferner ist der Faserführungskanal ausgebildet, ein Garn im Rahmen eines Anspinnvorgangs entgegen der Transportrichtung über die Eintrittsöffnung aus der Spinndüse zu führen. Im Rahmen des Anspinnvorgangs wird ein Garn zumindest zeitweise entgegen der Transportrichtung über die Eintrittsöffnung aus der Spinndüse geführt. Als Spinnvorgang wird hier der reguläre Betrieb der Luftspinnmaschine, also das Herstellen eines Garns aus dem Faserverband mit Hilfe der Spinndüse, bezeichnet. Als Anspinnvorgang wird hingegen der Betrieb zum Wiederanspinnen des Garns nach einer Unterbrechung des Spinnvorgangs bezeichnet.The object is achieved by a swirl element and a work station of an air-jet spinning machine with the features of the independent claims. 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. Furthermore, 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. During the piecing process, 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, on the other hand, refers to the operation for re-spinning the yarn after an interruption in the spinning process.
Erfindungsgemäß ist nun vorgesehen, dass der Grundkörper und/oder das Faserführungselement an der Eintrittsöffnung wenigstens eine Krümmung aufweist. Die Krümmung kann allgemein als eine Wölbung der Oberfläche verstanden werden. Mittels einer derartigen Krümmung kann eine Kante, welche durch zwei im Winkel zueinanderstehenden Oberflächen entsteht, geglättet werden. Durch diese Krümmung wird das Garn im Rahmen des Anspinnvorgangs sanft an der Eintrittsöffnung umgelenkt. Die sanfte Umlenkung des Garns entlang der Krümmung hat den Vorteil, dass die Reibung zwischen dem Garn und dem Drallelement reduziert wird. Ferner wird dadurch das Risiko von Garnschäden minimiert. Zusätzlich dazu ist aufgrund der Krümmung eine konstante Anlage des Garns am Drallelement während des Umlenkens realisierbar. Dies führt zu einem geringeren Platzbedarf des Garns beim Umlenken.According to the invention, it is now provided that 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. By means of such a curvature, an edge that is created by two surfaces at an angle to one another can be smoothed. As a result of this curvature, the yarn is gently deflected at the inlet opening during the piecing process. 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. In addition, due to the curvature, 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.
Vorteilhaft ist es, wenn die wenigstens eine Krümmung eine Rundung, insbesondere mit einem Radius von 0,5 mm bis 10 mm, ist. Eine Rundung ist meist die schonendste Form zur Umlenkung eines Garns, da hierbei die geringste Reibung und somit ein sehr geringes Risiko von Garnschäden besteht.It is advantageous if 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.
Ebenso ist es vorteilhaft, wenn die wenigstens eine Krümmung einen Krümmungswinkel von 60° bis 180°, vorteilhafterweise von 90° bis 120°, aufweist. Der Krümmungswinkel ist der Winkel, den zwei Geraden, welche jeweils vom Mittelpunkt zu einem der Endpunkte der Krümmung führen, aufspannen. Je größer der Krümmungswinkel ist, desto länger ist auch die Krümmung und desto weiter kann somit auch das Garn umgelenkt werden.It is also advantageous if 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.
Auch ist es äußert vorteilhaft, wenn der Faserführungskanal eine Faserführungskontur, insbesondere mit einer Faserführungsfläche und einer Einlauframpe, sowie eine der Faserführungskontur gegenüberliegende Begrenzungskontur aufweist, wobei die Krümmung an der Faserführungsfläche, der Einlauframpe und/oder der Begrenzungskontur angeordnet ist. Weist die Führungskontur vorteilhafterweise die Führungsfläche zum Führen des Faserverbands und die Einlauframpe zum Verhindern eines Faserbandstaus beim Eintritt auf, so sind die Führungsfläche und die Einlauframpe vorzugweise über eine Eintrittskante miteinander verbunden. Vorteilhaft ist es hierbei, wenn bei der Umlenkung des Garns in Richtung der Faserführungskontur die wenigstens eine Krümmung an der Eintrittskante, also zwischen Führungsfläche und Einlauframpe, angeordnet ist. Wird das Garn in Richtung der Begrenzungskontur umgelenkt, so ist die Krümmung vorteilhafterweise an der Begrenzungskontur angeordnet.It is also extremely advantageous if 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. If 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.
Ebenso ist es vorteilhaft, wenn der Faserführungskanal seitlich versetzt zu einer Längsachse der Spinndüse angeordnet ist, wobei die bezogen auf die Längsachse außenliegende Kontur des Faserführungskanals die Krümmung aufweist. Die Längsachse der Spinndüse ist hierbei die Achse, in der das Garn aus der Spinndüse abgezogen wird. Ist der Grundkörper des Drallelements rotationssymmetrisch, so ist die Längsachse der Spinndüse vorteilhafterweise ebenso die Rotationsachse des Drallelements. Bei der außenliegenden Kontur kann es sich sowohl um die Faserführungskontur oder um die Begrenzungskontur des Faserführungskanals handeln. Durch die versetzte Anordnung des Faserführungskanals und der Anordnung der Krümmung auf der außenliegenden Kontur erfolgt die Umlenkung stets derart, dass eine unnötige Richtungsumkehr des Garns vermieden wird. Daraus folgt eine besonders schonende Führung des Garns.It is also advantageous if 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. Due to the offset arrangement of the fiber guide channel and the arrangement of the curvature on the outer contour, the deflection always takes place in such a way that an unnecessary reversal of the direction of the yarn is avoided. This results in a particularly gentle guiding of the yarn.
Auch ist es von Vorteil, wenn das Faserführungselement und/oder der Grundkörper an der Eintrittsöffnung eine Faserführungshülse aufweist, wobei die Krümmung wenigstens zum Teil an der Faserführungshülse angeordnet ist.It is also advantageous if 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.
Die Faserführungshülse kann hierbei fest oder lösbar mit dem Faserführungselement und/oder dem Grundkörper in Verbindung stehen. Dadurch kann die Position der Krümmung und somit der Umlenkung verändert werden. Ebenso kann durch die Faserführungshülse der Krümmungswinkel und/oder der Radius der Rundung vergrößert werden. Ferner hat dies den Vorteil, dass die Faserführungshülse und so die Krümmung bei Bedarf entfernt werden kann.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.
Vorteile bringt es zudem mit sich, wenn die Faserführungshülse die Eintrittsöffnung des Faserführungskanals vollständig umschließt. Dadurch kann das Befestigen der Faserführungshülse am Faserführungselement und/oder am Grundkörper vereinfacht werden. Zusätzlich kann dadurch eine Verschiebung der Krümmung realisiert werden.There are also advantages if the fiber guide sleeve completely encloses the inlet opening of the fiber guide channel. As a result, the fastening of the fiber guide sleeve on the fiber guide element and / or on the base body can be simplified. In addition, a shift in the curvature can be realized in this way.
Vorteilhaft ist es zudem, wenn der Grundkörper und/oder das Faserführungselement und/oder die Faserführungshülse an der Eintrittsöffnung eine Führungsnut aufweist, wobei die Krümmung an der Führungsnut angeordnet ist.It is also advantageous if 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.
Durch die Führungsnut wird das Garn beim Umlenken durch die Krümmung geführt. Dadurch wird ein, insbesondere seitliches, Abgleiten des Garns von der Krümmung weg verhindert. Zusätzlich hat die Führungsnut den Vorteil, dass die Umlenkung in ihrer Position, insbesondere näher an die Austrittsöffnung des Drallelements, verlagert werden kann.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. In addition, 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.
Vorteile bringt es zudem mit sich, wenn die Führungsnut v-förmig, entgegen der Transportrichtung öffnend, ausgebildet ist. Die v-förmige Ausbildung erleichtert das Einführen des Garns in die Führungsnut. Zudem kann die v-förmige Führungsnut derart ausgebildet sein, dass das Garn im Rahmen des Anspinnvorgangs mittels Kontaktreibung gebremst wird. So kann zusätzlich oder alternativ die Garnspannung erhöht werden.It also has advantages if 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. In addition, 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.
Ebenso ist es vorteilhaft, wenn der Grundkörper und/oder das Faserführungselement einen Bremsabschnitt zum Bremsen des Garns im Rahmen des Anspinnvorgangs aufweist, wobei der Bremsabschnitt vorzugsweise im Bereich der Krümmung und/oder daran anschließend angeordnet ist. Als Bremsabschnitt ist dabei ein Abschnitt im Grundkörper und/oder im Faserführungselement zu verstehen, der das Garn im Rahmen des Anspinnvorgangs, insbesondere durch Kontaktreibung, bremst. Im Rahmen des Anspinnvorgangs wird häufig durch externe Mittel, insbesondere durch ein dem Drallelement vorgeschaltetes Streckwerk, das Garn mit einer Anspinnspannung belastet, um ein einfacheres Anspinnen zu gewährleisten. Der Bremsabschnitt kann dabei zusätzlich oder alternativ zu den externen Mitteln die Anspinnspannung erhöhen und dadurch den Anspinnvorgang vereinfachen.It is also advantageous if 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. During the piecing process, 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. In addition or as an alternative to the external means, the braking section can increase the piecing tension and thereby simplify the piecing process.
Vorteilhaft ist es zudem, wenn der Bremsabschnitt mäanderförmig, insbesondere als mäanderförmiges Tal, an der Krümmung, ausgebildet ist. Als mäanderförmige Ausbildung ist dabei eine Aneinanderreihung wenigstens zweier Bögen zu verstehen. Verläuft das Garn im Rahmen des Anspinnvorgangs innerhalb des mäanderförmigen Bremsabschnitts, so erfährt das Garn in dessen Verlauf mehrfache Richtungswechsel. Als mäanderförmiges Tal an der Krümmung ist eine mäanderförmige Vertiefung an der Krümmung zu verstehen. Diese Vertiefung kann zusätzlich einen Talgrundradius aufweisen, der vorzugsweise größer als der Garnradius ist und in welchem das Garn beim Umlenken verläuft. So kann das Garn mittels der Krümmung sanft umgelenkt und mittels des mäanderförmigen Bremsabschnitts sanft gebremst und dadurch die Anspinnspannung erhöht werden.It is also advantageous if 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.
Ferner wird eine Arbeitsstelle einer Luftspinnmaschine mit einer Spinndüse vorgeschlagen. Die Spinndüse weist ein Drallelement gemäß der vorangegangenen und/oder nachfolgenden Beschreibung auf, wobei die genannten Merkmale einzeln oder in beliebiger Kombination vorhanden sein können.Furthermore, a work station of an air-jet spinning machine with a spinneret is proposed. 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.
Vorteilhaft ist es, wenn die Arbeitsstelle einen Zwischenspeicher besitzt, zum Aufgreifen und Umlenken des Garns in eine Speicherrichtung über die wenigstens eine Krümmung. Der Zwischenspeicher ist hierbei vorteilhafterweise eine Saugeinheit, welche der Arbeitsstelle zustellbar oder integraler Bestandteil derselben ist und mit deren Hilfe das Garnende im Bereich der Austrittsöffnung des Drallelements ansaugbar ist. Zur Vorbereitung des Garnendes kann der Zwischenspeicher zusätzlich Mittel zur Garnendenpräparation aufweisen.It is advantageous if 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. In order to prepare the yarn end, the intermediate storage device can additionally have means for yarn end preparation.
Auch ist es von Vorteil, wenn die Transportrichtung mit der Speicherrichtung einen Umlenkwinkel aufspannt, wobei der Krümmungswinkel größer oder gleich dem Umlenkwinkel ist. Dadurch ist gewährleistet, dass das Garn während der Umlenkung stets auf der Krümmung aufliegt und so eine sanfte Umlenkung erfolgt.It is also advantageous if 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.
Zudem ist es von Vorteil, wenn sich die Mäanderform des Bremsabschnitts derart erstreckt, dass das Garn im Rahmen des Anspinnvorgangs innerhalb des Bremsabschnitts schräg zur Speicherrichtung umgelenkt und so gebremst wird.In addition, it is advantageous if 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.
Weitere Vorteile der Erfindung sind in den nachfolgenden Ausführungsbeispielen beschrieben. Es zeigt:
Figur 1- eine schematische Seitenansicht einer Arbeitsstelle einer Luftspinnmaschine während des Spinnvorgangs,
Figur 2- eine schematische Seitenansicht einer Arbeitsstelle einer Luftspinnmaschine ähnlich
Figur 1 während des Anspinnvorgangs, - Figur 3a
- eine schematische Seitenansicht einer geschnittenen Spinndüse gemäß einem Ausführungsbeispiel,
- Figur 3b
- eine schematische Seitenansicht einer geschnittenen Spinndüse gemäß einem alternativen Ausführungsbeispiel,
- Figur 4a
- eine schematische Seitenansicht eines geschnittenen Drallelements gemäß einem weiteren Ausführungsbeispiel,
- Figur 4b
- eine schematische Vorderansicht des Drallelements gemäß dem Ausführungsbeispiel der
Figur 4a , Figur 5- eine schematische Seitenansicht eines geschnittenen Drallelements gemäß einem weiteren Ausführungsbeispiel, und
Figur 6- einen Schnitt VI des Drallelements aus
Figur 4a .
- Figure 1
- a schematic side view of a work station of an air-jet spinning machine during the spinning process,
- Figure 2
- a schematic side view of a work station similar to an air-jet spinning machine
Figure 1 during the piecing process, - Figure 3a
- a schematic side view of a cut spinneret according to an embodiment,
- Figure 3b
- a schematic side view of a sectioned spinneret according to an alternative embodiment,
- Figure 4a
- a schematic side view of a cut swirl element according to a further embodiment,
- Figure 4b
- a schematic front view of the swirl element according to the embodiment of FIG
Figure 4a , - Figure 5
- a schematic side view of a cut swirl element according to a further embodiment, and
- Figure 6
- a section VI of the swirl element
Figure 4a .
Die Arbeitsstelle 1 verfügt in dem in
Innerhalb einer Wirbelkammer 11 wird der Faserverband 3 bzw. mindestens ein Teil der Fasern des Faserverbands 3 zur Herstellung eines Garns 12 auf bekannte Weise mit einer Drehung versehen. Die Drehung entsteht hierbei durch eine gezielte Luftströmung im Bereich der Spitze eines Garnbildungselements 13, wobei die Luftströmung durch vorzugsweise tangential in die Wirbelkammer 11 mündende Luftdüsen 14 erzeugt wird.Within a
Die gezeigte Arbeitsstelle 1 umfasst des Weiteren eine durch beispielsweise ein Abzugswalzenpaar gebildete Abzugseinrichtung 15 sowie eine dem Abzugswalzenpaar nachgeschaltete und eine auswechselbare Spule 16 aufweisende Spulvorrichtung 17. Die Spulvorrichtung 17 dient schließlich dem Aufspulen des in Transportrichtung T aus der Spinndüse 4 austretenden Garns 12, welches die Wirbelkammer 11 über einen innerhalb des Garnbildungselements 13 verlaufenden Abzugskanal 18 verlässt.The
Darüber hinaus verfügt die Luftspinnmaschine über eine Garnüberwachungseinheit 19, welche definierte Parameter des Garns 12 (z. B. die Garndicke, die Garnfestigkeit oder andere für die Qualität des Garns 12 repräsentative Parameter) überwacht.In addition, the air-jet spinning machine has a
Kommt es während der Garnherstellung zu einer Unterbrechung der Faserverbandzuführung, zu einem Garnriss zwischen der Spinndüse 4 und der Spulvorrichtung 17 oder zu einer gewollten Unterbrechung des Spinnvorgangs, weil das von der Spinndüse 4 hergestellte Garn 12 nicht den Vorgaben entspricht, so ist nach der Unterbrechung ein Anspinnvorgang nötig. Die Unterbrechung erfolgt hierbei durch Reduzierung der Fördergeschwindigkeiten des Streckwerks 2, der Abzugseinrichtung 15 und/oder der Spulvorrichtung 17. Die Reduzierung muss hierbei nicht gleichzeitig oder kontinuierlich erfolgen. In jedem Fall sollten die jeweiligen Fördergeschwindigkeiten jedoch derart gedrosselt werden, dass der stabile Spinnprozess durch Unterschreiten definierter Grenzwerte der Fördergeschwindigkeiten zusammenbricht und somit ab einem gewissen Zeitpunkt kein Garn 12 mehr aus dem Faserverband 3 erzeugt wird. Zu diesem Zeitpunkt kommt es schließlich zu einer Unterbrechung der Garnherstellung, bei der sich das Garn 12 ohne separate Krafteinwirkung von dem Faserverband 3 löst.If the fiber structure feed is interrupted during yarn production, a yarn break between the
Ziel ist es schließlich, dass sich ein entstandenes spulenseitiges Garnende 20 (siehe
Bei den nachfolgenden Beschreibungen der in den Figuren dargestellten Ausführungsbeispielen werden für Merkmale, die im Vergleich zu vorangestellten Ausführungsbeispielen in ihrer Ausgestaltung und/oder Wirkweise identisch und/oder zumindest vergleichbar sind, gleiche Bezugszeichen verwendet. Sofern diese nicht nochmals detailliert erläutert werden, entspricht deren Ausgestaltung und/oder Wirkweise der Ausgestaltung und Wirkweise der vorstehend bereits beschriebenen Merkmale.In the following descriptions of the exemplary embodiments shown in the figures, the same reference symbols are used for features that are identical and / or at least comparable in their design and / or mode of operation compared to the preceding exemplary embodiments. Unless these are explained again in detail, their design and / or mode of action corresponds to the design and mode of action of the features already described above.
Ein an der Arbeitsstelle 1 angeordneter Zwischenspeicher 21 greift das Garnende 20 an der Eintrittsöffnung 9 auf und lenkt das Garn 12 in eine Speicherrichtung S um. Das Aufgreifen und Umlenken erfolgt vorteilhafterweise mittels Unterdruck. Zur Vorbereitung des Garnendes 20 kann der Zwischenspeicher 21 Mittel zur Garnendenpräparation aufweisen. Die Speicherrichtung S kann dabei, wie im vorliegendem Ausführungsbeispiel gezeigt, quer zu einer Drehachse D einer der Walzen des Streckwerks 2 verlaufen. Die Drehachse D verläuft im gezeigten Ausführungsbeispiel somit senkrecht zur Blattebene. Alternativ kann die Speicherrichtung S parallel bzw. in Richtung der Drehachse D einer der Walzen des Streckwerks 2 verlaufen.An
Um die Umlenkung möglichst sanft zu gestalten, wird im Rahmen der vorliegenden Erfindung ein Drallelement 5 vorgeschlagen, mit dessen Hilfe die Reibung zwischen dem Drallelement 5 und dem Garn 12 reduziert wird und somit ein sehr geringes Risiko von Garnschäden besteht. In vorliegendem Ausführungsbeispiel weist der Grundkörper 6 und das Faserführungselement 7 eine Krümmung 22, insbesondere eine Rundung mit einem Radius zwischen 0,5 mm und 10 mm, zum sanften Umlenken des Garns 12 auf. Diese Krümmung 22 kann im Grundkörper 6, im Faserführungselement 7 oder wie hier dargestellt übergreifend im Grundkörper 6 und im Faserführungselement 7 angeordnet sein.In order to make the deflection as gentle as possible, a
Die wenigstens eine Krümmung 22 ist dabei derart am Drallelement 5 angeordnet, dass das Garn 12 beim Aufgreifen und Umlenken in die Speicherrichtung S über die wenigstens eine Krümmung 22 verläuft. Verläuft somit die Speicherrichtung S wie hier dargestellt, quer zur Drehachse D, so ist die Krümmung 22 quer zur Drehachse D am Drallelement 5 angeordnet. Verläuft die Speicherrichtung S alternativ in Richtung der Drehachse D, so ist die Krümmung 22 in Richtung der Drehachse D am Drallelement 5 angeordnet. Anschließend daran kann der Anspinnvorgang fertig gestellt werden, indem das Garnende 20 zusammen mit dem Faserverband 3 in die Spinndüse 4 eingeführt und kontrolliert überlagert wird.The at least one
Alternativ ist es selbstverständlich möglich, die dem Anspinnvorgang vorausgehende Umlenkung und/oder die Garnendenpräparation nicht durch den spinnstelleigenen Zwischenspeicher 21, sondern durch eine Bedienperson auf händische Weise oder durch einen Serviceroboter mit Zwischenspeicher 21 ausführen zu lassen, der entlang einer Vielzahl von Arbeitsstellen 1 hin und her patrouilliert.Alternatively, it is of course possible to have the deflection and / or the yarn end preparation prior to the piecing process carried out not by the spinning station's own
Um beim Spinnvorgang, wie in
In
Ähnlich zum Ausführungsbeispiel der
Um ein seitliches Abgleiten des Garns 12 zu vermeiden, ist an der Einlassöffnung 9 des Drallelements 5 eine Führungsnut 23 angeordnet. Die Führungsnut 23 kann vorteilhafterweise v-förmig ausgebildet sein. Die v-förmige Ausbildung erleichtert das Einführen des Garns 12 in die Führungsnut 23 im Rahmen des Anspinnvorgang. Diese Führungsnut 23 hat den zusätzlichen Vorteil, dass die Krümmung 22 in Transportrichtung T näher an die Austrittsöffnung 10 des Faserführungskanals 8 verlegt werden kann. Ist die Spinndüse 4 in einer Arbeitsstelle 1, wie in den
In
Im Unterschied zu den vorangegangenen Figuren weist das Ausführungsbeispiel in
Alternativ zu dem hier abgebildeten Ausführungsbeispiel ist es möglich, dass sich die Krümmung 22 über den Grundkörper 6 und/oder das Faserführungselement 7 erstreckt. Ferner könnte an der Faserführungshülse 26, am Grundkörper 6 und/oder am Faserführungselement 7 eine Führungsnut 23 ähnlich zum Ausführungsbeispiel der
Wie im Ausführungsbeispiel der
Alternativ zu dem hier abgebildeten Ausführungsbeispiel ist es möglich, dass sich der Bremsabschnitt 28 über den Grundkörper 6 und/oder das Faserführungselement 7 und/oder der Faserführungshülse 26, die in
Die vorliegende Erfindung ist nicht auf die dargestellten und beschriebenen Ausführungsbeispiele beschränkt. Abwandlungen im Rahmen der Patentansprüche sind ebenso möglich wie eine Kombination der Merkmale, auch wenn diese in unterschiedlichen Ausführungsbeispielen dargestellt und beschrieben sind.The present invention is not limited to the illustrated and described exemplary embodiments. Modifications within the scope of the patent claims are just as possible as a combination of the features, even if these are shown and described in different exemplary embodiments.
- 11
- Arbeitsstelleplace of work
- 22
- StreckwerkDrafting system
- 33
- FaserverbandFiber bandage
- 44th
- SpinndüseSpinneret
- 55
- DrallelementSwirl element
- 66th
- GrundkörperBase body
- 77th
- FaserführungselementFiber guide element
- 88th
- FaserführungskanalFiber guide channel
- 99
- EintrittsöffnungInlet opening
- 1010
- AustrittsöffnungOutlet opening
- 1111
- WirbelkammerVortex chamber
- 1212th
- Garnyarn
- 1313th
- GarnbildungselementYarn forming element
- 1414th
- LuftdüseAir nozzle
- 1515th
- AbzugseinrichtungDeduction device
- 1616
- SpuleKitchen sink
- 1717th
- SpulvorrichtungWinding device
- 1818th
- AbzugskanalExhaust duct
- 1919th
- GarnüberwachungseinheitYarn monitoring unit
- 2020th
- GarnendeEnd of yarn
- 2121
- ZwischenspeicherCache
- 2222nd
- Krümmungcurvature
- 2323
- FührungsnutGuide groove
- 2424
- FaserführungskonturFiber guide contour
- 2525th
- BegrenzungskonturBoundary contour
- 2626th
- FaserführungshülseFiber guide sleeve
- 2727
- EintrittskanteLeading edge
- 2828
- BremsabschnittBraking section
- TT
- TransportrichtungTransport direction
- SS.
- SpeicherrichtungStorage direction
- KK
- KrümmungsaufspannwinkelAngle of curvature
- UU
- UmlenkwinkelDeflection angle
- LL.
- LängsachseLongitudinal axis
- DD.
- DrehachseAxis of rotation
Claims (15)
der Grundkörper (6) und/oder das Faserführungselement (7) an der Eintrittsöffnung (9) wenigstens eine Krümmung (22) aufweist zum sanften Umlenken des Garns (12) im Rahmen des Anspinnvorgang.Swirl element (5) for a spinneret (4) of an air-jet spinning machine,
the base body (6) and / or the fiber guide element (7) at the inlet opening (9) has at least one curvature (22) for gently deflecting the yarn (12) during the piecing process.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020109170.2A DE102020109170A1 (en) | 2020-04-02 | 2020-04-02 | Twist element for a spinneret of an air-jet spinning machine as well as work station of an air-jet spinning machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3889327A1 true EP3889327A1 (en) | 2021-10-06 |
EP3889327B1 EP3889327B1 (en) | 2023-10-25 |
Family
ID=75362493
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21166694.6A Active EP3889327B1 (en) | 2020-04-02 | 2021-04-01 | Spinneret of an air spinning machine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3889327B1 (en) |
CN (1) | CN113493950A (en) |
DE (1) | DE102020109170A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0389178U (en) * | 1989-12-26 | 1991-09-11 | ||
DE69707197T2 (en) | 1996-05-16 | 2002-06-20 | Murata Kikai K.K., Kyoto | Piecing method and device for a spinning machine |
DE10258719A1 (en) * | 2002-12-09 | 2004-06-24 | Wilhelm Stahlecker Gmbh | Machine spinning thread from staple fiber band using air vortex, includes twist-blocker formed by deflection surface for thread |
EP3243941A1 (en) * | 2016-04-29 | 2017-11-15 | SAVIO MACCHINE TESSILI S.r.l. | Air-jet type spinning device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008006379A1 (en) | 2008-01-29 | 2009-07-30 | Oerlikon Textile Gmbh & Co. Kg | Air-jet spinning device for use in production of yarn, has cladding gap downstream to plane, in which air flow initially withdrawing from nozzles impinges housing part surface, where gap width suddenly increases and is in specific range |
DE102012101039A1 (en) | 2012-02-09 | 2013-08-14 | Maschinenfabrik Rieter Ag | Air-jet spinning machine with separate spinning and piecing nozzles |
-
2020
- 2020-04-02 DE DE102020109170.2A patent/DE102020109170A1/en active Pending
-
2021
- 2021-03-31 CN CN202110354402.1A patent/CN113493950A/en active Pending
- 2021-04-01 EP EP21166694.6A patent/EP3889327B1/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0389178U (en) * | 1989-12-26 | 1991-09-11 | ||
DE69707197T2 (en) | 1996-05-16 | 2002-06-20 | Murata Kikai K.K., Kyoto | Piecing method and device for a spinning machine |
DE10258719A1 (en) * | 2002-12-09 | 2004-06-24 | Wilhelm Stahlecker Gmbh | Machine spinning thread from staple fiber band using air vortex, includes twist-blocker formed by deflection surface for thread |
EP3243941A1 (en) * | 2016-04-29 | 2017-11-15 | SAVIO MACCHINE TESSILI S.r.l. | Air-jet type spinning device |
Also Published As
Publication number | Publication date |
---|---|
CN113493950A (en) | 2021-10-12 |
DE102020109170A1 (en) | 2021-10-07 |
EP3889327B1 (en) | 2023-10-25 |
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