EP0990719B1 - Spinning device - Google Patents

Description

The invention relates to a spinning device according to the Preamble of claim 1.

DE 40 36 119 describes a device for producing a twisted thread known in which a guide member inside a nozzle block is arranged. That from a drafting system outgoing sliver is drawn into the nozzle block and near the inlet opening of a spindle around the sliver exposed to rotating air flow and thereby rotated. A Fiber strand guide takes the place as a so-called false core the inner fibers of the sliver, causing the fibers along the outer peripheral surface of the fiber strand guide need to move to the inlet port. The Fibers uncontrolled by the effect of the rotating air flow exposed. A distracting, from the turning range on the spindle towards the exit point of the sliver between continuous false wire on the front rollers of the drafting system only the one arranged inside the sliver acts Fiber strand guide counter. The sliver is then sucked into the spindle by means of a suction air flow, and so on to create a thread.

Modern spinning machines are constantly increasing Productivity and yarn properties requirements posed.

The invention is therefore based on the object generic device for sliver guidance so too improve that an improved manufacturing process is possible is.

This task is characterized by the characteristics of the Claim 1 solved.

Further advantageous embodiments of the invention are Subject of the subclaims.

According to the invention, the sliver guide is outside of a imaginary center line of the running sliver arranged so that at least some of the fibers are on the inside Surface of the sliver guide is passed, the Sliver guide from spaced apart Fiber guiding elements exist, which the free passage of a Allow part of the fibers as a core fiber bundle. The can Spinning device be designed so that the core fiber bundle not when passing the sliver through the sliver guide is deflected. With such a form of training can high production speeds can be achieved. Advantageous the core fiber bundle comprises at least 10%, preferably 20% to 40% of the fibers. By touching the sliver standing, inner surface of the fiber guide elements becomes a good hold or good guidance of the sliver caused between the fiber guide elements. The shares of Core and cladding structures can thus be controlled in parallel longitudinally oriented and divided into twisted fibers be, with the core fibers only a certain proportion form. The uncontrolled spreading of fibers and Fiber ends as well as continuing to twist towards to the exit point of the sliver between the Front rolling of the drafting system is effectively prevented.

With fiber guide elements that form the core fiber bundle, can be arranged in parallel in the longitudinal direction oriented fibers and thus improve the yarn properties. At the same time, an increase in Production speed enabled.

In a further advantageous embodiment, at least one Part of the fiber guide elements designed as a flat plate, which has a stronger effect on the sliver leaves. Alternatively, at least part of the is preferably Fiber guiding elements are needle-shaped. This allows that Applying particularly low pressure to the sliver. Fiber guide elements that are flat or needle-shaped are easy to manufacture. A Training the fiber guide elements as parts of a single Body, the fiber guide elements from a hollow cone are generated by introducing openings also simple and therefore inexpensive to manufacture and allows an improvement of yarn values especially at high Production speeds. The introduction of the openings can by eroding or drilling.

The training can also take the form of a compact sliver guide device with sliver channel and Fiber guiding elements take place, the sliver guiding device consists of one piece. Through the compact, one-piece design becomes easy to use and enables easy and quick interchangeability.

In a preferred embodiment, the fiber guide elements evenly distributed around the sliver, in particular concentric or symmetrical, and the Minimum distance of the fiber guide elements from the imaginary The center line of the running sliver is slightly less than half the diameter of the sliver. Have an advantageous effect a single sliver has at least three fiber guiding elements on. Such arrangements allow targeted dosing or Increasing the leadership and holding effect. Preferably, the Fiber guide elements each have the same shape to a approximately uniform effect over the scope of the To achieve sliver distribution.

The inlet opening is preferably at least on the outlet side the sliver is designed as a slit-shaped sliver channel, on its opposite long sides Fiber guide elements are arranged, the Fiber guide elements at least approximately parallel to that imaginary centerline of the sliver so that they extend part of the fiber flow from the channel to the vicinity of Cover the input opening of the spindle and therefore largely withdraw from the influence of the rotating air flow. This is the whereabouts of a core fiber bundle with predominantly parallel and longitudinal fibers in largely undisturbed Arrangement allows. With the invention Spinning device can be thread speeds of 300 m / min and more and thus achieve high productivity. A increased yarn strength and thus an increase in value of the finished Yarn is also possible. For printing the from the Compressed air source supplied compressed air can be a low value to get voted. Given the large number of spinning positions modern spinning machine leads to low air pressure considerable cost reductions in yarn production.

The fiber guide elements advantageously follow in Direction of fiber flow directly onto the sliver channel and are seen in the middle of the width of the sliver channel the long sides of the sliver channel arranged. The one Sliver facing inner surfaces of the fiber guide elements run in the fiber flow direction or in the direction of respective free end of the fiber guide elements on the Center of the sliver and have the smallest distance from each other at their free ends, thereby introducing facilitates and the guidance of the continuous sliver is improved.

The fiber guide elements are preferably so elastic trained to be at an increase in through the sliver applied to the inner surfaces of the fiber guide elements Pressure can be deflected across the extension. The fiber guide elements preferably run with their free, ends pointing in the direction of movement of the sliver flow towards each other and have the smallest distance from each other their free ends without touching each other. The Fiber guide elements are advantageously designed so that you Cross section increases towards the free ends. It can Core fiber bundle centered on the imaginary axis of the Device run and the imaginary center line of the Sliver and the axis of the device coincide. By such training will be the introduction and the run the sliver facilitates and the leadership of the continuous sliver improved.

The position of the fiber guide elements is preferably adjustable and can be chosen according to the respective requirements become. In particular, the distance between the free Ends of the fiber guide elements and the entrance opening of the Spindle 0.2 mm to 0.7 mm. This will make a targeted Control both in the effect and in the area of effect possible in a particularly simple manner. With such training and changing the position of the fiber guide elements can Thread formation can be influenced and varied advantageously.

With the device according to the invention, a high Productivity at high thread speeds of over 300 m / min and possible with increased yarn tenacity. The Spinning device can be manufactured inexpensively and operate.

Further details of the invention are given below the embodiments shown in the drawings.

Fig. 1 eine erfindungsgemäße Vorrichtung in schematischer Darstellung im Längsschnitt,

Fig. 2 die Ansicht des Spindelkopfes in Längsrichtung,

Fig. 3 eine Teilansicht des Spinnvorganges im Bereich der Faserführungselemente und des Spindelkopfes,

Fig. 4 die Teilansicht der Fig. 3 mit Längsschnitt des Spindelkopfes und gesponnenem Fadenabschnitt,

Fig. 5 eine perspektivische Darstellung des Prinzips des Spinnvorganges,

Fig. 6 die schematische Darstellung einer zweiten Ausführungsform der Faserführungselemente,

Fig. 7 die Ausführungsform der Fig. 6 in der Ansicht I-I,

Fig. 8 und 9 die schematische Darstellung weiterer Ausführungsformen der Faserführungselemente.

Fig. 10 Faserführungselemente, die mit einem Faserbandleitkörper eine Einheit bilden, in eine Spinnstelle eingebaut und im Längsschnitt dargestellt,

Fig. 11 eine Ausbildung einer Faserbandführung mit schlitzförmigem Faserbandkanal in schematischer Darstellung,

Fig. 12 eine Ausführungsform gemäß Fig. 11 mit Faserführungselementen im Längsschnitt, vergrößert dargestellt,

Fig. 13 die Ausführungsform der Fig. 11 im Schnitt I-I,

Fig. 14 die Ausführungsform der Fig. 13 in der Ansicht II-II.

Show it:

1 shows a device according to the invention in a schematic representation in longitudinal section,

2 shows the view of the spindle head in the longitudinal direction,

3 is a partial view of the spinning process in the area of the fiber guide elements and the spindle head,

4 shows the partial view of FIG. 3 with a longitudinal section of the spindle head and spun thread section,

5 is a perspective view of the principle of the spinning process,

6 shows the schematic representation of a second embodiment of the fiber guide elements,

7 shows the embodiment of FIG. 6 in view II,

8 and 9 the schematic representation of further embodiments of the fiber guide elements.

10 fiber guide elements, which form a unit with a sliver guide body, installed in a spinning station and shown in longitudinal section,

11 shows a design of a sliver guide with a slit-shaped sliver channel in a schematic representation,

12 shows an embodiment according to FIG. 11 with fiber guide elements in longitudinal section, shown enlarged,

13 shows the embodiment of FIG. 11 in section II,

Fig. 14 shows the embodiment of Fig. 13 in view II-II.

The spinning station 1 shown in FIG. 1 has a housing 2 on, at one end a disc 3 arranged and the two front rollers 4,4 'of a drafting system is facing. in the Inside the housing 2 between the disc 3 and one Receiving body 5 is held by a retaining ring 6 Nozzle device 7 is formed around an axis 8. The axis 8 falls in the representation of FIG. 1 with the center line 9 of the continuous sliver 10 together. From the inlet side of the Housing 2 leads a sliver channel 11 along the Center line 9 in the middle through the disk 3. From the sliver channel 11 there is a transition through an expanding conical Section into an initially cylindrical and then yourself also tapered area within the Nozzle device 7 and the receiving body 5. In the conical trained cavity 12 of the receiving body 5 and the Nozzle device 7 projects with a hollow spindle 13 to the spindle input opening 14 tapering Spindle head 15 into it. Between the spindle 13 and the Nozzle device 7 and the receiving body 5 remain annular part of the cavity 12.

On the disk 3 is the fiber guide elements 16 formed fiber guide attached, the Fiber guide elements 16 obliquely inwards The direction of fiber movement is inclined towards the center line 9 run. Is located between the housing 2 and the retaining ring 6 an air chamber 17. The air chamber 17 is over to the outside a bore 18 with one for simplification reasons shown air source and inward through further holes 19 connected to an annular air duct 20. The Nozzle device 7 is provided with four air nozzles 21, which Connect air duct 20 to the sliver duct 11 and at the Mouth in the sliver channel 11 in a tangential orientation on a between the fiber guide elements 16 and the Spindle input opening 14 are directed area. The Compressed air supplied by the air source flows over the Air chamber 17 in the annular air channel 20 is then emitted from the air nozzles 21 and thus generated one rotating at high speed around the sliver 10 Air flow directly at the spindle inlet opening 14. This Airflow is stopped after rotating through the annular part of the cavity 12 in the chamber 22 and continue to an opening in the Housing 2 passed through which it exits. Generated at the same time this airflow is a suction airflow that is related to that at a Nip point 23 of the front rolls 4, 4 'emerging sliver 10 through the inlet opening 24 and the sliver channel 11 in the Cavity 12 moves and in the cavity 12 by one of one Vacuum source, not shown, generated suction air flow is continued.

The sliver 10 stretched in the drafting system is used by the Front rollers 4,4 'fed to the spinning station 1 and supported from the suction air flow acting in front of the guide channel, into which centrally arranged inlet opening 24 of the disk 3 and further drawn into the sliver channel 11. The inside on the Axis 8 or directed towards the sliver 10 Inclination of the needle-shaped fiber guide elements 16 facilitates the introduction and management of the current Sliver 10.

Further details can be found in FIGS. 2 to 5. The Fiber guide elements 16 can put a slight pressure on the Exercise sliver 10, which deforms somewhat in this case, as shown in Fig. 2. With this kind of Positive-locking guidance of the sliver 10 is a Propagate the rotation in the sliver 10 over the between the Fiber guide elements 16 and the spindle input opening 14 lying area in the direction of the front rollers 4,4 ' of the drafting system effectively prevented.

Moves the rear end of a fiber 25 in the area of around the moving sliver 10 circulating air flow outside of the covering effect of the fiber guide elements 16, so it is the force of the exiting from the air nozzles 21 Airflow fully exposed and is from the surface of the Sliver 10 lifted or released. The other End of fiber 25 is not peeled off. It's a twist subjected and already inserted into the hollow spindle 13 and hence the immediate effect of the air flow withdrawn. Detached free fiber ends are replaced by the rotating air flow and, supported by the in the cavity 12 acting suction air flow to the spindle inlet opening 14 and looped around the conical spindle head 15 as in FIG. 3 shown. The loop can be in several turns respectively.

By the movement of the sliver 10, which in the illustration of Figures 1 and 2 from left to right, the rear free ends of the fibers 25 continuously retracted, with a helical wrap of the Sliver 10 takes place through the free ends. The Manufacturing principle for such a thread 26 illustrates Fig. 4. The proportions of the core and shell structures in Cross-section of the thread 26 are in this way in parallel in Longitudinally oriented and divided into twisted fibers, the longitudinally oriented core fibers only one form a small part of the thread 26. One remains in the thread 26 real rotation.

The principle of the spinning process described is also from Fig. 5 in a simplified perspective view seen. The path of the sliver 10 or Spun thread 26 runs in the illustration in FIG. 5 linear and horizontal and is through the center line 9 indicated. After passing through the nozzle device 7 and Fiber guide elements 16, the sliver 10 of the effect of subjected to air flow directed in the direction of the arrow and as spun thread 26 drawn off by the spindle 13.

6 and 7 show fiber guide elements 27, which as triangular plates are formed. With that of the center line 9 facing tip act symmetrically around the center line 9 arranged fiber guide elements 27 to that in FIGS. 6 and 7 sliver 10, not shown.

Fig. 8 also shows a plate-shaped design of Fiber guiding elements 28, the center line 9 facing edge of the fiber guide elements 28 on an arc moved the middle and also not in Fig. 8 Sliver 10 shown over a compared to FIG. 6th longer area guided by the fiber guide elements 28 and is covered.

The fiber guide elements 29 shown in FIG. 9 are made of made in one piece, wherein a hollow body 30 both one Sliver guide body 31 as well as by introducing the Openings 32 produced fiber guide elements 29. The Introducing the openings 32 can be simple, for example Way by eroding or drilling. The Fiber guide elements 29 widen to their free ones the axis of rotation of the hollow body 30 towards the ends. As a result, they form and guide the not shown, along the Rotation axis of the hollow body 30 moving sliver particularly effective.

10 shows a sliver guide, the Fiber guide elements 33 also part of a single one Hollow body 34 corresponding to that shown in FIG. 9 Execution are. The partially conical one Hollow body 34 comprises a sliver guide body 35 with a Sliver channel 36 and the concentric around the Axis of rotation 37 of the hollow body 34 arranged Fiber guide elements 33, which have their free ends on the Rotation axis 37 approach. The one shown in FIG Sliver guide is integrated in a spinning station, the largely that shown in Fig. 1 and already detailed corresponds to the described design of the spinning station 1. In the 10 has a disc 38, the holds the sliver guide body 35 centrally.

11 also corresponds to the spinning device largely the spinning devices already described 1 and 10. The disc 39, however, holds an alternative Form of training for sliver guidance. The Sliver guide body 40 surrounds a slot-shaped Sliver channel 41. The to the sliver channel 41 in Connecting fiber flow direction and with the Sliver guide body 40 forming a unit Fiber guiding elements 42, 43 are on the long sides of the slot-shaped sliver channel 41 arranged that the Fiber guide element 42 the continuous sliver 44 in the middle from above and the fiber guide element 43 in the middle of the Fiber guide element 42 opposite the lower side of the Sliver 44 acted upon with a guiding effect and the Surface of the sliver 44 is partially covered. The each coming into contact with the sliver 44 lying surface of the fiber guide elements 42,43 slightly inclined towards the inside to the fiber flow direction Center line 45 of the sliver 44 without reaching it. The slightly larger distance from the center line 45 to the inside to the surface of the sliver 44 directly facing the sliver guide body 40 adjacent part of the Fiber guide elements 42,43 compared to the fiber flow direction at the free ends 46,47 lying surface of the Fiber guide elements 42, 43 facilitate the introduction and improves the guidance of the continuous sliver 44.

Another alternative embodiment is shown in FIGS. 12 to 14 remove.

These figures show one in different views Sliver guide body 48 with a sliver channel 49, the Sliver guide body 48 with two fiber guide elements 50, 51 forms a unit consisting of one piece. The each to the imaginary center line 52 of the not shown Fiber band lying surface of the fiber guide elements 50, 51 runs slightly inclined inwards to the fiber flow direction towards the center line 52 without reaching it, the Angle α is about 89 °. The fiber channel is slit-shaped with a height 53 of, for example, 0.6 mm and a width 54 of, for example, 3.6 mm. During the running Spinning process, the cross section of the sliver channel 49 from continuous sliver filled. On in the fiber flow direction seen rear end of the sliver guide body 48 closes at the top and bottom of the Long side of the slit-shaped sliver channel 49 Fiber guide element 50.51 in the middle. The ends 55,56 of the Fiber guide elements 50, 51 are towards the center line 52 directed concave.

The invention is of course not on the illustrated embodiments limited. So it can Spindle 13 in addition to the fixed shown Embodiment may also be rotatable. The direction of rotation the spindle 13 and the blow-out direction of the air nozzles 21 cause the enveloping direction of the fibers. They are preferably correct Direction of rotation of the spindle 13 and the blow-out direction of the Air nozzles 21 for an undisturbed wrapping direction of the Sheath fiber ends match. The center line 9 of the sliver 10 does not have to be continuously aligned on the extension of the Axis 8 of the spindle 13 lie, but can for example in places run at an acute angle to axis 8.

The drive and the storage of device parts as well as the Control and linking with previous or subsequent aggregates, unless otherwise specified here explained in a manner known per se.

Claims (16)

1. Spinning device comprising an inlet aperture for a drafted sliver (10, 44), a sliver guide and a hollow spindle (13) for guiding the formed and drawn-off thread (26), means being available for producing an air flow in the region of the sliver guide and the spindle (13), the air flow acting on the fibres of the drafted sliver (10, 44) to rotate it, characterised in that the sliver guide is arranged outside an imaginary median line (9, 45, 52) of the running sliver (10, 44) in such a way that at least some of the fibres on the inner surface of the fibre guide are guided along, the sliver guide consisting of mutually spaced fibre guide elements (16, 27, 28, 29, 33, 42, 43, 50, 51) allowing free passage of a core fibre bundle.
2. Device according to claim 1, characterised in that the core fibre bundle comprises at least 10%, preferably 20% to 40% of the fibres.
3. Device according to either of claims 1 or 2, characterised in that the fibre guide elements (29, 50, 51) are at least partially constructed in such a way that they form the core fibre bundle.
4. Device according to either of claims 1 or 2, characterised in that at least some of the fibre guide elements (27, 28, 42, 43) are designed as a flat plate.
5. Device according to either of claims 1 or 2, characterised in that at least some of the fibre guide elements (16) are needle-shaped in design.
6. Device according to any one of claims 1 to 3, characterised in that the fibre guide elements (33) form parts of a single body and are produced from a hollow cone by introducing apertures.
7. Device according to any one of the preceding claims, characterised in that the fibre guide elements (16, 27, 28, 29, 33, 42, 43, 50, 51) are arranged uniformly distributed around the sliver (10, 44), in particular concentrically or symmetrically, and the minimum spacing of the fibre guide elements (16, 27, 28, 29, 33, 42, 43, 50, 51) from the imaginary median line (9, 45, 52) of the running sliver (10, 44) is slightly less than half the diameter of the sliver (10, 44).
8. Device according to any one of the preceding claims, characterised in that the sliver guide comprises at least three fibre guide elements (16, 27, 28) acting on a single sliver (10).
9. Device according to any one of claims 1 to 4, characterised in that the inlet aperture, at least on the discharge side of the sliver (44), is designed as a slot-shaped sliver passage (41, 49), on the opposing longitudinal sides of which the fibre guide elements (42, 43, 50, 51) are arranged and in that the fibre guide elements (42, 43, 50, 51) extend at least virtually parallel to the imaginary median line (45, 52) of the sliver (44), so they cover a part of the fibre flow from the sliver passage (41, 49) virtually up to the inlet aperture (14) of the spindle (13) and therefore as far as possible remove it from the action of the rotating air flow.
10. Device according to claim 9, characterised in that the fibre guide elements (42, 43, 50, 51) in the fibre flow direction directly follow the sliver passage (41, 49) and, viewed over the width (54) of the sliver passage (41, 49), are respectively arranged in the centre on the longitudinal sides of the sliver passage (41, 49).
11. Device according to any one of the preceding claims, characterised in that the fibre guide elements (16, 27, 28, 29, 33, 42, 43, 50, 51) have the same shape.
12. Device according to any one of the preceding claims, characterised in that the fibre guide elements (16, 27, 28, 29, 33, 42, 43, 50, 51) each have at least one free end (46, 47, 55, 56) pointing in the fibre flow direction, run toward the centre of the sliver (10, 44) in the fibre flow direction with the inner face facing the sliver (10, 44) and have the least spacing from one another at their free ends (46, 47, 55, 56).
13. Device according to any one of the preceding claims, characterised in that the fibre guide elements (16, 29, 33, 42, 43, 50, 51) are designed to be elastic in such a way that in the event of an increase in the pressure applied by the sliver (10, 44) on the inner faces of the fibre guide elements (16, 29, 33, 42, 43, 50, 51), they can be deflected transversely to their extension.
14. Device according to either of claims 1 or 2, characterised in that the fibre guide elements (29) are designed in such a way that their cross-section increases toward the free ends.
15. Device according to any one of the preceding claims, characterised in that the spacing between the free ends of the fibre guide elements (16, 27, 28, 29, 33, 42, 43, 50, 51) and the feed aperture (14) of the spindle (13) is 0.2 mm to 0.7 mm.
16. Device according to any one of the preceding claims, characterised in that the position of the fibre guide elements (16, 27, 28, 29, 33, 42, 43, 50, 51) can be adjusted.

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