EP1853755A1

EP1853755A1 - Flyerless spinning method and device with a drawing unit

Info

Publication number: EP1853755A1
Application number: EP05823834A
Authority: EP
Inventors: Chokri Cherif
Original assignee: Rieter Ingolstadt Spinnereimaschinenbau AG
Current assignee: Rieter Ingolstadt GmbH
Priority date: 2005-03-03
Filing date: 2005-11-15
Publication date: 2007-11-14
Anticipated expiration: 2025-11-15
Also published as: CN101133197A; DE102005009731A1; DE502005011257D1; EP1853755B1; ATE505571T1; CN101133197B; WO2006092176A1; JP2008531862A; US20060207238A1

Abstract

Proposed is a spinning method for the direct spinning of sliver (FB') by means of a ring spinning machine ( 200 ), whereby one or more slivers (FB'), which said slivers were previously produced in a carding ( 100 ) or a combing machine, were drafted in a first draft system ( 4 ) situated upstream of the said ring spinning machine ( 200 ) to produce a single sliver (FB'), which, without the interposition of a flyer was made available to the ring spinning machine ( 200 ), in which the said single sliver (FB'), by means of a second draft system ( 204 ) is drawn and formed into a yarn (G). The invented method characterizes itself in that the sliver (FB'), at the output of the first draft system ( 4 ) has a band weight less than 2.5 ktex and is provided with a protective winding, and in that this sliver (FB') in the second draft system ( 204 ) is subjected to a draft of more than 30. Likewise, an apparatus to carry out this method is also proposed.

Description

Flyerless spinning process and device with a drafting system

The invention relates to a flyless spinning method for directly spinning sliver and a device with a drafting system according to the preambles of the independent claims.

Various attempts have been made to spin out slivers directly on the ring spinning machine. In such spinning process can be dispensed with the flyer process, so that thereby costs and space can be saved. It is known, in particular, to lay slivers with belt finenesses of about 5 ktex following a first drafting system, which is usually a component of a line, in cans. These cans are then fed to a gate, where they are withdrawn and introduced into each spinning station of a ring spinning machine. Since false distortions can easily occur at the gate, no fine strips below 3.5 ktex were used here. Since the distortion on the ring spinning machine is limited, only coarse ring yarns can be spun out with this known method. However, this method has not enforced because of the difficult operation, the space required by the cans and said Fehlverzügen.

Finer yarns are usually obtained by interposing a flyer, by means of which a sliver with an exemplary weight of 5 ktex band to a roving (roving) with a Luntengewicht 200 - 1200 tex warped and wound on a spool, to then present this to a ring spinning machine. It is an object of the present invention to develop a method and a device according to the preambles of the independent claims such that fine to very fine yarns can be obtained without the use of a flyer.

This object is achieved in the aforementioned method or the device by the features of the independent claims.

The essence of the invention is that in the first drafting a thin strip is obtained, which is then provided with a protective rotation and then warped in the second drafting with a high delay.

Compared to the prior art, in this case one or more fiber ribbons in the first drafting system are warped to form a thin sliver, which lies below the usual band weight at the exit of a section. Although it is known to warp by means of the known routes one or more slivers down to 1, 5 ktex; However, the resulting sliver is not provided here with an effective protective rotation, apart from the low protection rotation (in the range of one rotation per meter sliver), which is obtained by the rotating belt channel and the other hand, much slower rotating round storage can. Also, such a thin sliver in the prior art is not presented directly to a second drafting system. By contrast, very fine yarns in the range down to 10 tex and less can be obtained by means of the procedure according to the invention, which was not possible with the known processes. This means that yarns can be produced without the use of a flyer, which ensure the highest standards in terms of fineness. The very work-, capital- and space-intensive flyer is no longer necessary according to this procedure. According to the invention, the sliver produced by the first drafting system has a band weight of less than 2.5 ktex, and preferably less than 1.3 ktex. Particularly preferably, the band weight of the sliver produced by the first drafting system is below 0.8 ktex. Such bands can be realized by means of a route by one or more slivers can be fed to this first drafting system. For example, a single strip fed to the drafting system may have a strip thickness of about 5 ktex, which is warped in the drafting system with a draft of 6 to obtain a sliver with a fineness below 1 ktex. In the case of, for example, four slivers to be doubled, each having a band strength of 5 ktex and a distortion of 20, a sliver having a fineness of 1 ktex would be obtained.

In addition to the thin sliver to be produced, the device according to the invention is characterized in that the means for generating the protective rotation are designed such that the number of rotations per meter of sliver produced is greater than five, advantageously even greater than ten.

The method according to the invention makes it possible to choose the delivery speed of the sliver produced by the first drafting device greater than 250 m / min, since the protective rotation makes the sliver less sensitive.

Particularly preferably, the second drafting system is part of a spinning station of a ring spinning machine, which is designed and operated so that a delay of more than 40, preferably more than 70 and preferably more than 100 has.

In a produced from the first drafting sliver with, for example, a band weight of 1 ktex and, for example, a default of 100 This results in a yarn of fineness 10 tex, which in many cases meets the highest standards of fineness.

The storage of the stretched in the first drafting sliver can be done in pitchers. Preferably, however, the stretched sliver is wound on a spool, which is then the spinning machine - in particular a ring spinning machine - submitted.

According to a particularly preferred embodiment, the coil is arranged to wind up the stretched sliver with horizontally oriented coil axis. It is advisable in this case to oscillate the coil back and forth in the horizontal direction in order, for example, to achieve a cross or parallel winding of the sliver on the winding body.

According to an alternative embodiment alternates instead of the rotating coil, which is arranged with a horizontal axis, the storage organ, which is formed for example as a band channel. In this case, the coil-near end of the filing device oscillates back and forth along the bobbin. The end remote from the coil can be arranged in a stationary manner, wherein the deposition member is moved in the manner of a pendulum.

Advantageously, in the aforementioned embodiment, the storage element during the pendulum movement additionally be set in rotation about its axis in order to obtain a protective rotation in aufweri- on the bobbin aufzuwickeln sliver.

According to an advantageous alternative, the coil can also be aligned or be with a vertical coil axis, wherein the coil for winding the distorted in the first drafting sliver in the vertical direction can be changed. Again, the coil can be made according to an alternative tive embodiment be arranged stationary, while the storage organ oscillates along the vertical bobbin.

In order to obtain the protective rotation of the sliver stretched by the first drafting system, there are several possibilities which are already known per se. For example, for this purpose at least one nozzle can be used at the outlet of the first drafting system, which is designed, for example, as a pneumatically actuated compression nozzle. The compression nozzle may be provided between the first drafting device and downstream Kander rollers. Alternatively, the compaction nozzle is provided downstream of said calender rolls.

The mentioned compression nozzle has a passage for the sliver. Preferably, at least one through-bore opens eccentrically into this passage, which preferably extends at an angle or obliquely to the passage. By means of this arrangement, the sliver in the passage channel is given a rotation about its longitudinal axis, which causes the desired protective rotation of the sliver. Alternatively, the device for generating a protective rotation can comprise a rotation tube which rotates about its longitudinal axis, either alternately in left and right rotation or only in one direction of rotation. Other alternatives for false twisting stationary wire screws, rings, flat rotors, rods o. The like.

According to a further alternative (or additionally), the means for generating the protective rotation comprise a band channel, as is known, for example, in principle for depositing sliver in sliver cans. Such a belt channel is usually arranged in a turntable and has a curved space curve to store sliver in loops. In a winding of the sliver produced in the first drafting device on a horizontally oriented coil, the inlet and the outlet of the band channel is arranged on a common straight line in a preferred embodiment, which is used only for generating the protective rotation. The band channel is preferably rotated in this horizontal coil position around this straight line, which thus defines an axis of rotation, whereby the desired protective rotation is obtained. In a vertical coil arrangement, the band channel inlet and band channel outlet are preferably offset from one another.

Advantageous developments of the invention are characterized by the features of the subclaims.

In the following the invention will be explained in more detail with reference to FIGS. Show it:

Figure 1 is a schematic representation of the production of

Cotton flakes to a yarn;

Figure 2 is a schematic side view of the mechanics of a route;

FIG. 3 shows a drafting system with an oscillating horizontal cross-wound bobbin;

FIG. 4 shows a drafting arrangement with a horizontal parallel winding reel and an oscillating belt channel;

Figure 5 is a drafting with a vertical cross-wound bobbin, and 6a, b, c different means for achieving a protective rotation of the sliver at the exit of the drafting system according to the figures 2 to 4.

FIG. 1 schematically shows a sequence of spinning machines. The hopper 105 of a card 100 is filled, for example, with cotton, and the card 100 produces from the cotton material in a known manner by carding the cotton a sliver FB. This sliver FB can be stored in a can 110 and then delivered to a downstream section 1 (as shown in FIG. 1), or the sliver FB 'is fed directly to the route 1. The line 1 produces from one or more slivers FB (shown is the case of only one sliver) a sliver FB 'which is wound on a spool 70 according to the embodiment of FIG. 1 (see also the following figures). Downstream of the track 1 is a ring spinning machine 200 with a plurality of Riemchenstreckwerken 204 (only one is shown), which in each case a coil 70 with sliver FB 'is supplied. The ring spinning machine 200 produces from this sliver FB 'a yarn G, which is also wound on a spool 290. According to the invention, no flyer is provided between the track 1 and the ring spinning machine 200.

A route 1 is shown in more detail in Figure 2 in a schematic side view. Here are several, essentially untwisted fiber ribbons FB (these are shown here from above) of the route 1 presented side by side. It is also possible to supply the track only a sliver FB, which is presented by an upstream carding or combing machine directly or under clipboard in a pot (see Figure 1). At the entrance of the track 1, a funnel 12 is arranged, which compresses the slivers FB. Alternatively, other compressors may be used. After passing through a scanning device 2, 3 as a component an inlet sensor, the now compressed sliver FB ', which consists of the plurality of individual slivers FB, guided in a drafting system 4, which forms the core of the route 1.

In the present case, the drafting device 4 has three drafting elements or pairs of rollers, between which the actual distortion takes place. These are the input roller pair 5a, 5b, the middle pair of rollers 6a, 6b and the output or supply roller pair 7a, 7b, which rotate in this order each increased peripheral speed. As a result of these different circumferential speeds of the pairs of rollers, the sliver FB ', which is laid out like a nonwoven in the drafting system and clamped along the clamping lines of the respective pairs of rollers, is warped in accordance with the ratio of the circumferential speeds. The pair of input rollers 5a, 5b and the middle pair of rollers 6a, 6b form the so-called pre-draft field VF, the middle pair of rollers 6a, 6b and the delivery roller pair 7a, 7b, the so-called main drafting field HF.

In the main drafting field HF, a pressure bar 20 is also arranged, which deflects the fiber sliver FB 'and thus provides better guidance of the fibers, in particular the fibers not clamped between the two roller pairs 6a, 6b and 7a, 7b (so-called floating fibers). The warped sliver FB 'is summarized by means of a Umlenkoberwalze 9 and a belt forming device 10 and a Kalanderwalzenpaar 13, 14 and a curved band channel 16 which is arranged in a rotating with the angular velocity Ω turntable 17, at a speed v _L in one Can 18 stored. The tape storage is thus accomplished by the belt channel 16 and the rotating pot.

It should be noted that in Figure 1, only mechanical components of the route 1 are shown. Regulation facilities, central computer, drives u. Like. Are not shown, since they are not essential in the context of the present invention and can correspond to the known embodiments.

According to the invention, the sliver FB 'at the exit of the drafting system 4 has a band weight of less than 2.5 ktex. Preferably, the tape weight is even less than 1.3 ktex, and preferably less than 0.8 ktex. The aim of this low band weight at the exit of the first drafting system 4 is, together with a high draft of more than 30, preferably more than 70 and preferably more than 100, in the second drafting unit 204 of the ring spinning machine 200 (see Figure 1) a yarn on the ring spinning machine 200, which ranges from a yarn count of below 100 tex down to 10 tex or even less. Such Garnfeinheiten are not yet known in flyerlosen process and are realized with the inventive design of the presented method or the presented device. Dispensing with the elaborate flyer saves space, time and costs.

According to the invention, the sliver FB 'after leaving the first drafting system 4 is provided with an effective protective rotation to give it a higher strength, without thereby the defaulting ability in the second drafting system is significantly affected. According to the embodiment of Figure 3, this protective rotation, which in the apparatus according to the invention is more than five rotations per meter of sliver, is realized by a band channel 26 rotating about a vertical axis 21 (see arrow f1), its inlet 26a and outlet 26a centric lie on this axis 21. The warped sliver FB 'obtained by the curved course of the belt channel 26 and the rotation of the desired protective rotation to subsequently spool it according to the embodiment shown in Figure 3 on a spool 70 a only schematically indicated winding device 75, wherein the coil 70 to their horizontal coil axis 71 rotates (see arrow f2). In order to realize the distribution of the sliver FB 'on the entire bobbin, the coil 70 reciprocates in the direction of its axis 71 (see arrow f3). The corresponding coil drives are not shown here for the sake of simplicity. Single drives or multiple drives can be used. Control via a central computer of the route 100 is recommended.

In the embodiment according to FIG. 3, the band deposition is realized by the band channel 26 and the winding device 75.

4, a winding device 85 is shown with a stationary coil 80, which is set in rotation about its longitudinal axis 81 (see arrow f4) by a schematically indicated drive device 82. The coil-side end 36b of a spatially curved band channel 36 is frictionally engaged by an endless flat belt 88, which is wound around two horizontally spaced cylinders 87, 89 rotatable about their vertical longitudinal axes. The cylinder 87 is driven in such a way by a reversing motor 86 (see arrow f5) that the belt 88 oscillates back and forth (see arrow f6) while the outlet 36b of the belt channel 36 moves from one end of the reel to the other and back that the sliver FB 'is wound onto the spool 80. The spool-distal inlet 36a of the band channel 36 is substantially stationary, so that the band channel 36 moves in the manner of a slow pendulum. In the illustrated embodiment, a parallel winding is achieved on the coil 80 in this case. Any guide means to guide the band channel 36 exactly at this pendulum motion, are not shown for simplicity.

The belt channel 36 is additionally rotated about its own longitudinal axis by the two-sided frictional engagement on the part of the belt (see arrow f7), whereby the desired protective rotation is achieved in the fiber belt FB '. As shown in Figure 5, according to another embodiment, a winding device 95 is provided with a vertically arranged coil 90 with the thus vertically aligned coil axis 91 at the output of the track 1. Again, the spool 90 travels up and down in the direction of the vertical axis 91 (see arrow f8) in order to wind up the sliver FB 'over the entire package height.

A band channel 46, which is immediately downstream of the calender rolls 13, 14, also serves here to issue a protective rotation in the sliver FB '. However, the outlet 46b of the band channel 46 is eccentrically arranged so that the band channel 46 can rotate around the coil 90 to wind up the sliver FB '(see arrow f8).

According to FIGS. 6a and 6b, 6c, two possibilities are shown in order to impart protective rotation to the sliver FB '-as a alternative or in addition to a sliver channel 16, 26, 36 or 46. In FIG. 6a, a rotary tube 56 is shown, which is set in rotation about its longitudinal axis according to arrow f10. The fiber sliver FB 'winds here around a wire screw 57 running inside the rotary tube 56. In conjunction with said rotation, the sliver FB' at the exit of the rotary tube 56, from which it is pulled off here by means of rollers 13a, 14a, receives the desired protective rotation before it is placed in a jug or wound on a spool.

FIGS. 6b, 6c show an obliquely-cut top view or a sectional side view of a pneumatically actuated compression nozzle 66, which has a central through-passage 67 for the fiber band FB '. In these, two through holes 68 running obliquely to the fiber-belt transport direction open eccentrically, into which compressed air is introduced (see arrows f11). This can on the one hand for threading of the sliver FB 'into the nozzle 66, on the other hand, for twisting the sliver FB' in the nozzle 66 (see arrows f8).

The compression nozzle 66 may be upstream or downstream of the calender rolls 13, 14. For example, it can replace the band-forming device 10 or the band channel 26 shown in FIG.

The inventive method makes it possible to set the delivery speed v _L (see Figure 2) of the first drafting system 4 to more than 250 m / min, since the protective rotation of more than five turns per meter - advantageously more than ten turns per meter - the From the first drafting 4 produced sliver FB 'is sufficiently fixed.

The invention is not limited to the illustrated and described embodiments. Variations within the scope of the claims are possible. For example, instead of a ring spinning machine, other spinning machines can be used, for example air or friction spinning machines. Likewise, it is possible to give the sliver leaving the line a more effective protective rotation (at least five turns per meter of sliver) by rotating a round tray - if one is used according to Figure 2 - at a higher speed than is usual. The false-twisting, which is generated solely by the rotation of the curved band channel (in the range of one turn per meter), is thereby amplified. Advantageously, in this case the speed ratio (revolutions per unit time) of the turntable 17 together with the belt channel 16 to the can 18 10: 1, preferably 4: 1, preferably 2: 1 or even more effective - even below. Traditionally, this ratio is about 20: 1. It is advisable to put the can 18 in faster rotation to reduce the speed ratio in order to obtain the desired protective rotation. Moreover, the invention can be used for routes in which the first drafting system can be regulated or unregulated.

Claims

Patent claims

1. A flyless spinning method for directly spinning sliver (FB ') by means of a spinning machine (200), wherein in one of the spinning machine (200) upstream, the first drafting system (4) one or more slivers (FB') previously from at least one card ( 100) or combing machine are produced, are drawn to a sliver (FB '), which is presented without the interposition of a flyer of said spinning machine (200), in which the sliver (FB') by means of a second drafting system (204) stretched and to a Yarn (G) is formed, characterized in that the sliver (FB ') at the output of the first drafting system (4) has a band weight of less than 2.5 ktex and is provided with a protective rotation, and in that this sliver

(FB ') in the second drafting system (204) is warped with a delay of more than 30.

2. The method according to claim 1, characterized in that in the first drafting system (4) a sliver (FB ') is produced with a band weight of less than 1, 3 ktex.

3. The method according to claim 1 or 2, characterized in that in the first drafting system (4) a sliver (FB ') is produced with a band weight of less than 0.8 ktex.

4. The method according to any one of the preceding claims, characterized in that the delivery speed of the first drafting system (4) warped sliver (FB ') is more than 250 m / min.

5. The method according to any one of the preceding claims, characterized in that the stretching in the second drafting system (204) in a ring spinning machine (200) or air-spinning machine is made.

6. The method according to any one of the preceding claims, characterized in that the second drafting system (204) is a Riemchenstreckwerk.

7. The method according to any one of the preceding claims, characterized in that the sliver (FB ') in the second drafting system (204) is warped with a default of more than 40.

8. The method according to any one of the preceding claims, characterized in that the sliver (FB ') in the second drafting system (204) is warped with a delay of more than 70.

9. The method according to any one of the preceding claims, characterized in that the sliver (FB ') in the second drafting system (204) is warped with a delay of more than 100.

10. The method according to any one of the preceding claims, characterized in that the sliver (FB ') following the drawing in the first drafting device (4) on a spool (70; 80; 90) is wound, which then the spinning machine (200) is submitted.

1 1.Verfahren according to any one of the preceding claims, characterized in that the coil (70, 80) for winding up the sliver (FB ') with a horizontal coil axis (71, 81) is arranged.

12. The method according to any one of claims 1 to 10, characterized. that the coil (90) for winding up the sliver (FB ') with vertical

Coil axis (91) is arranged.

13. The method according to any one of the preceding claims, characterized in that the first drafting system (4) produced sliver (FB ') is provided with a protective rotation such that the number of rotations per meter sliver is greater than five.

14. The method according to any one of the preceding claims, characterized in that the protective rotation in the first drafting system (4) produced sliver (FB ') is issued with more than ten turns per meter sliver.

15. The method according to any one of the preceding claims, characterized in that the protective rotation by means of at least one nozzle (66) at the output of the first drafting system (4) is realized.

16. The method according to any one of the preceding claims, characterized in that the protective rotation by means of a pneumatically acted compression nozzle (66) is generated.

17. Method according to one of the preceding claims, characterized in that the protective rotation is generated mechanically, for example by means of a rotating tube (56), a band channel (16; 26; 36; 46) or the like.

18. The method according to any one of the preceding claims, characterized in that the protective rotations in the sliver (FB ') by adjusting the speed ratio of turntable (17) incl. Bandkanal (16) to a round storage can (18), which the sliver ( FB ') receives from the first drafting system (4), to below 10: 1, preferably below 4: 1, generated.

19. Device with a drafting system (4), in which one or more fiber slivers (FB) presented are converted into a resulting sliver (FB '). stretches, with a device for the tape storage (16, 18, 26, 75, 36, 85, 46, 95) for depositing this sliver (FB '), characterized in that the drafting system (4) for producing a sliver (FB'; ) having a band weight of between 0.3 ktex to 2.5 ktex, and means (16, 18; 26; 36, 88; 46; 56; 66) are provided which comprise a

Protective rotation in the produced sliver (FB ') with five or more turns per meter of sliver effect.

20. Device according to one of the preceding device claims, (Ja ₁ characterized in that the drafting system (4) a plurality of roller pairs

(5a, 5b, 6a, 6b, 7a, 7b), each defining a nip line for the fiber material to be drawn.

Apparatus according to any one of the preceding apparatus claims, characterized in that the means (16, 18; 26; 36, 88; 46; 56; 66) for generating the protective rotation comprise at least one pneumatically actuated compression nozzle (66).

22. Device according to one of the preceding device claims, characterized in that the compression nozzle (66) between the first drafting system (4) and this downstream calender rolls (13,

14) is provided.

23. Device according to one of the preceding device claims, characterized in that the compression nozzle (66) downstream of the calender rolls (13, 14) is arranged.

24. Device according to one of the preceding device claims, characterized in that the compression nozzle (66) has a passage channel (67) for the sliver (FB '), in which at least one obliquely to the passage channel (67) extending through bore (68) opens eccentrically.

25. Device according to one of the preceding device claims, characterized in that the means (16, 18; 26; 36, 88; 46; 56; 66) for generating the protective rotation comprise stationary or rotating elements (56) which mechanically effect the protective rotation, for example, rotating tubes (56), stationary wire screws, rings, flat rotors, rods o. The like ..

26. Device according to one of the preceding device claims, characterized in that the means (16, 18; 26; 36, 88; 46; 56; 66) for generating a protective rotation comprise a band channel (16; 26; 36; 46).

27. Device according to one of the preceding device claims, characterized in that the inlet (26 a) and the outlet (26 b) of the band channel (26) lie on a common axis (21).

28. Device according to one of the preceding device claims, characterized in that the band channel (26) about the said axis (21) is set in rotation.

29. Device according to one of the device claims 19 to 26, characterized in that the outlet (46 b) is arranged eccentrically to the axis (91) of the inlet (46 a).

30. Device according to one of the preceding device claims, characterized in that the inlet (36 a) of the band channel (36) is substantially stationary, while the outlet (36 b) is capable of performing a traversing movement along a coil (80).

31. Device according to one of the preceding device claims, characterized in that the device for the tape storage (16, 18, 26, 75, 36, 85, 46, 95) comprises a driven winding device (75, 85, 95), by means of which the produced sliver on a coil (70; 80; 90) can be wound up.

32. Device according to one of the preceding device claims, (Ja ₁ characterized in that the winding device (75; 85) for receiving a coil (70; 80) with a horizontal position of the coil axis (71; 81) is formed.

33. Device according to one of the device claims 19 to 31, characterized in that the winding device (95) for receiving a coil

(90) is formed with a vertical position of the coil axis (91).

34. Device according to one of the device claims 19 to 29, characterized in that the band channel (16) in a turntable (17) is arranged and the speed ratio of turntable (17) to the round storage can (18) to less than 10: 1, preferably under 4: 1 is adjustable.