CN115485424B

CN115485424B - Apparatus and method for producing combed sliver

Info

Publication number: CN115485424B
Application number: CN202180027293.0A
Authority: CN
Inventors: 妮可·泽格; 罗兰·弗里德里希
Original assignee: Trutschler Group Europe
Current assignee: Trutschler Group Europe
Priority date: 2020-04-09
Filing date: 2021-02-26
Publication date: 2024-03-22
Anticipated expiration: 2041-02-26
Also published as: DE102020109963A1; EP4133124A1; CN115485424A; WO2021204462A1

Abstract

The invention relates to a method and a device for producing combed fibre slivers (F), comprising a winding machine (W) and at least one combing machine, wherein the winding machine (W) produces a set of a plurality of lap (1) made of sliver (4) for each combing machine, the lap is transported to the combing machine and is passed to a combing head (20), wherein combed fibre slivers are produced from each lap (1), wherein one or more fibre slivers are subsequently drawn into individual fibre slivers (F). The invention is characterized in that the deviation of the sliver mass of the fiber sliver (F) is measured, compared with a nominal sliver weight and correlated with the unwinding length of the lap (1), wherein the drafting and/or tensioning on the winding machine (W) is adjusted for the next group of lap (1) over the winding length by means of said data.

Description

Apparatus and method for producing combed sliver

Technical Field

The present invention relates to a device and a method for producing combed fibre sliver according to the preamble of claims 1 and 9.

Background

It is known in the textile art to feed carded and drawn fibre sliver to a winding machine, which produces a lap from this. One or more of the lap is a reserve for producing combed sliver in the comber. Typically 5 to 6 combers are associated with a winder which produces a lap from 20 to 36 slivers. At least 8 rolls are again passed to a combing machine for combing, from which rolls drawn fiber strands of as uniform quality as possible are produced. In a winding machine, the head end of the sliver that is directly attached to the winding tube cannot be drawn to the desired mass, since this head end must first be threaded into a different roller pair and therefore cannot be drawn. In this case, the first few meters of cotton weight lying against the winding tube are too high. Likewise, the end of the sliver that is externally applied to the lap and that first enters the combing machine cannot be drawn to the desired mass on the combing machine, since it is likewise necessary to first penetrate into the combing machine. In this case, the cotton grammage of the first few meters is too high. The lap thus has a sliver weight at least at its head end and at its tail end that deviates from the nominal value, which must be adjusted by, for example, drafting or drafting adjustments in a combing machine for eight or more combed slivers. For this purpose, the combing machine has a plurality of individually driven drafting mechanism rollers per drafting mechanism in the main drafting, which results in high investment costs. In combing machines without individually driven drafting system rollers, quality fluctuations remain in the sliver, since no adjustment is possible.

Disclosure of Invention

Accordingly, the object of the present invention is to improve a device and a method for producing combed sliver as follows: the fibre sliver produced in the combing machine has a constant fibre mass at low cost.

The invention solves the task by means of a device having the features given in claim 1 and by a method according to claim 9. Advantageous embodiments of the invention are defined in the dependent claims.

The invention relates to a device for producing combed sliver, comprising a winding machine and at least one combing machine, wherein the winding machine is designed to produce a set of a plurality of lap rolls made of sliver for each combing machine. By means of the transport system, the lap can be transported to at least one combing machine and given to the combing head. The at least one combing machine is configured for producing a combed sliver from each lap, which is then drawn together with the other slivers of the combing machine into individual slivers.

The invention comprises the following technical teachings: the at least one combing machine has a measuring device which is designed to measure a deviation of the sliver quality of a sliver. The control device of the combing machine is designed to compare the sliver quality of the sliver with a nominal sliver weight and to correlate the unwinding length of the lap. By means of these data, the draft and/or tension of the sliver on the winder can be adjusted over the winding length for the next group of rolls for the combing machine. Alternatively or additionally, the drafting and/or tensioning of the sliver at the combing head of the combing machine can be regulated.

The drafting and/or tensioning can preferably be adjusted between the winding roller against which the lap is held in the combing machine and the feed cylinder. Alternatively, the draft and/or tension can be adjusted between the rollers and pressure rollers used in the automatic winding and laying process and the feed rollers.

The advantage of the described method is that all combing machines can be equipped with simpler and cheaper drafting mechanisms, wherein only one pair of drafting mechanisms needs to be equipped with drives in the main drafting and still produce a constant sliver quality. The previous second drive in the main draft can be omitted in the draft mechanism, since the optimization of the sliver quality is mainly carried out in the winding machine. This saves costs, since the drive motor is omitted on each combing machine, energy is also saved on the combing machine and a more compact construction of the drafting mechanism is obtained. Finally, the combed sliver is optimized by manual or automatic data exchange between the at least one combing machine and the winder. In this case, the operating data of the winding machine is adapted to the deviation of the sliver on the combing machine from the nominal sliver weight over the winding length.

In an advantageous development of the invention, the drafting and/or tensioning on the winding machine can be achieved by actuating at least one drafting mechanism and/or changing the relative speed between the two winding elements. In this case, the drafting can advantageously be varied by means of at least one drafting mechanism and/or a pressure roller on the winding machine. The optimization of the sliver quality of a sliver on a combing machine can be started with a drawing mechanism or a press roller in such a way that the drawing and the merging of the sliver or the drawn sliver fed into the winder are optimized.

Once the cotton is formed from the delivery of the draft sliver, the tensioning of the cotton can preferably be influenced by a winding roller, which can form a winding element of the type possible.

The data for changing the draft and/or tension on the winder can be transmitted from the at least one combing machine to the winder, preferably manually or by means of a control device of the apparatus. The control of the combing machine can be shown, for example, on a display, in which length range the mass of the sliver needs to be adjusted. This may be entered by the user into the control of the winder manually or with a data bar or using a tablet or smartphone. Alternatively, the control device of the apparatus can automatically perform a data exchange and control the winder for the next group of lap in terms of draft and tension over the winding length by means of the measured and analyzed data processed in the control device of the combing machine.

The lap group can be transported manually, semi-automatically or automatically to the associated combing machine by means of a transport system. The winder indicates to the user on the operating display when manually transporting, to which combing machine the lap group should be transported. In semiautomatic transport, the user may only have to put the lap into the combing machine from the transport trolley, since the transport trolley is equipped with a lap group from the winder and travels to the associated combing machine by means of the transport system. In the case of automatic transport, the lap is automatically removed after the winder, automatically transported and automatically placed into the associated combing machine.

The measuring device is preferably arranged on or in a sliver funnel of the at least one combing machine, wherein the sliver funnel is arranged downstream of the drafting mechanism. The measuring horn is configured to detect the sliver weight of the sliver at the sliver horn. The control device of the combing machine determines a deviation from the nominal sliver weight of the combed sliver F, which deviation is associated with the unwinding length of the lap. The unwinding length of the lap is determined by inverse calculation of the fibre mass at the sliver horn and the draft at the combing machine, so that deviations in the fibre mass can be correlated accordingly with the lap length with an accuracy of, for example, a few cm. The inverse calculation is carried out in the control device of each combing machine, which displays data for the user or transmits the data to the upper control device of the device. The drafting on the winder is adjusted using the determined data, so that the end of the sliver that is first supplied to each combing head is drafted in such a way that a constant sliver weight is present.

The method according to the invention for producing combed sliver comprises a winding machine and at least one combing machine, wherein the winding machine produces for each combing machine a set of a plurality of lap rolls made of sliver. The lap group is transported to the associated combing machine and delivers its lap to each combing head. Combed slivers are produced from each lap (4 to 16 slivers are produced per comber) and these are finally drawn into individual slivers. The invention is based on the following recognition: the deviation of the sliver weight from the nominal value can be compensated by adjusting the winder, at least for the next group of rolls. The invention is characterized in that the deviation of the sliver quality of a sliver is measured, compared with a target value and correlated with the unwinding length of the lap. By means of these data, the draft and/or tension on the winder can be adjusted over the winding length for the next group of rolls (1).

With the method according to the invention, the process can be optimized by the cooperation of the two machines of the production line, whereby the subsequent combing machine can be produced more cheaply, since the drives in the main drafting of the drafting mechanism can be omitted here. Thus, the combing machine consumes less power, is cheaper and can be constructed more compactly. While a constant sliver weight at the combing machine can be achieved.

The draft and/or tension of the head end and/or the tail end may preferably be adapted to the unwinding length of each of the rolls in the set. Thus, a constant or different cotton grammage is produced for the lap group over the winding length, whereby the combing process can be optimized.

Ideally, a constant cotton grammage can be produced over the whole winding length by means of the previously mentioned measures. Alternatively, with the device and the method, the cotton grammage over the winding length may be varied, for example to compensate for process variations on a combing machine. For example, depending on the diameter of the lap, different winding stresses (tensions) are advantageous. The adjusted cotton grammage may be advantageous for optimal combing results. When a new lap is handed over to the combing machine after the replacement of the lap, no stress is applied to the lap when the sliver is introduced. Lack of usual draft and thus higher quality fibers are combed. In this case, it may be practical to reduce the grammage of the sliver on the winder W by, for example, 3% to 6% over the respective length of the sliver.

Drawings

Other measures for improving the invention are explained in more detail below with the aid of the figures together with a description of a preferred embodiment of the invention.

In the figure:

FIG. 1 shows an apparatus for producing combed sliver;

FIG. 2 shows a schematic view of a winder;

fig. 3 shows a schematic side view of a combing head of a combing machine;

fig. 4 shows a schematic top view of a combing machine.

Detailed Description

Fig. 1 shows a device for producing combed fibre sliver, with at least one winding machine W, an automatic or manual transport system T, and a plurality of combers K1-K6. From the cans 10, the winding machine W is supplied with fibre or draft slivers 9, which are thus produced into a lap 1 for delivery to the combing machine K. The transport of the lap 1 from the winder W to the combing machines K1-K6 can be effected manually, semi-automatically or automatically by means of the transport system T. The manual transport of the lap W can be performed by a manually movable storage cart which can accommodate at least 8 or more lap for delivery to a single combing machine. The semiautomatic transport can take place by means of an automatically movable storage trolley which, after the first loading of the rolls, automatically moves the rolls to the respective combing machine and feeds them there into the receiving device. The automatic transport can take place by means of a ceiling-based transport system, from which a corresponding number of rolls 1 are taken out of temporary storage downstream of the winder W and automatically transported to the transport device of the combing machine and stored there. The control device S is designed to compare the operating data of the winding machine W with the operating data of the combing machines K1 to K8 and to control them accordingly.

According to fig. 2, a lap 1 is located on two winding rollers 2 and 3 (winding nip) of a winder W, which can rotate in the direction of the arrow. The tampon 4 (shown in broken lines) passes through a nip (press nip) comprising at least three press rolls 5,6 and 7, after which it travels towards the roll 1 and is wound onto the roll 1. The sliver 4 is formed in the drafting mechanism 8 of the winder W from one or more conveyed webs or adjacent drafting bars 9. A further drawing mechanism or drawing mechanisms may also be connected upstream of the drawing mechanism 8. A table nip consisting of two rollers 11,12 is arranged between the output roller of the drawing mechanism 8 and the pressure roller 5 of the compression nip. A deflection roller 13 is arranged upstream of the input rollers of the drafting mechanism 8 for deflecting the fibre sliver or the drafting sliver 9 from the upstream sliver can (not shown) and creel (not shown). The working direction of the coiler is denoted by a. Arrows B and C indicate the direction of travel of the drafted draft sliver 9 or sliver 4. The direction of rotation of the rolls 2,3, 5,6,7, 11 and 12 and the lap 1 is indicated by curved arrows.

The drawing mechanism 8 can be designed as a 3-up 3-down drawing mechanism, i.e. it consists of three lower rollers and three upper rollers. Alternative draft mechanism designs, such as a 4 up and 3 down draft mechanism, are also possible. A composite fibre sliver consisting of a plurality of fibre slivers or drawn slivers 9 is drawn in a drawing frame 8. The drafted sliver 9 is stretched into sliver 4 in direction B by means of the pinch rollers 11,12 and is deflected in direction C.

The winding rollers 2,3 each have a separate drive, at least one of which is controllable or adjustable, so that the winding rollers 2,3 can be operated at the same or different rotational speeds. In order to avoid the formation of air bubbles in the produced lap 1 and to stabilize the draft to the sliver 4, the winding rollers 2,3 are driven with a tension of 0 to 5%. This means that one winding roller 2,3 (preferably winding roller 3) is operated at a rotational speed which is not more than 5% lower than the winding roller 2. By means of the drives of the winding rollers 2,3 to be controlled or regulated individually, the separation process can be modified during the winding of the lap 1 in that the sliver 4 between the pressing roller 7 and the winding roller 2 is separated by a later stop of the winding rollers 2 and 3 and a simultaneous stop of the pressing rollers 5,6,7, but one end remains between the winding roller 2 and the pressing roller 7, whereby the coiler (after the insertion of a new bobbin 1 a) can automatically continue to run. Thereby, manual insertion of the tampon 4 is no longer necessary. Only when changing cans is the draft strip 9 manually placed. The press rolls 5,6,7 are also preferably provided with a separate and controllable or adjustable drive, respectively, so that the draft between the press rolls 5,6,7 and also between the press roll 7 and the winding roll 2 can be adjusted when forming the bubble. Thus, the process of producing the lap 1 can be further optimized and stabilized, whereby it is possible to run at a higher production speed.

In fig. 3, a combing head 20 is shown, wherein at least eight combing heads are mounted on a combing machine. For clarity, this embodiment is shown and described with only one combing head 20, with the details shown here mounted on each of these combing heads, except for a common drive unit and coiler. The combing head 20 comprises two winding rollers 21,22, wherein the front winding roller 21 is connected to a drive 23 driven by a motor 24. The fleece 1 is placed on winding rollers 21,22 from which the sliver 4 is unwound by a rotational movement. The sliver 4 can be diverted at the roller 25 and transferred to the feeding cylinder 26 of the nipper mechanism 27. Here, a pressure roller 30 which can be pivotally supported about a lever 28 by the loading of a spring 29 is arranged on a roller 25 which is likewise driven by the drive 23. This embodiment with rollers, spring-loaded levers 28 and pressure rollers is preferably used only during automatic lap extension and need not be an integral part of each combing machine. The clamp mechanism 27 can be driven in a back and forth motion by means of a lever by a shaft 31 connected to the driver 23. According to the example shown, the nipper mechanism 27 is in a forward position and delivers the combed fibre fleece to a subsequent pair of separating rollers 32. A circular comb 33 is rotatably mounted below the nipper mechanism 27, which circular comb, via its needle plate seat, combs out the fibre fleece provided by the closed nipper. The circular comb 33 is likewise in driving connection with the driver 23. The tampon 4 is wound around the winding bobbin 1 a. A ratchet wheel, not shown, is fastened to the feed cylinder 26, which ratchet wheel is rotated stepwise by a pawl, also not shown, due to the reciprocating movement of the nipper mechanism 27 and thereby feeds the tampon 4 to the jaws of the nipper for combing out. In operation, the sliver 4 is continuously unwound as a result of the rotational movement of the fleece 1 by the winding rollers 21,22 and reaches via the clamping position of the pressure roller 30 with the roller 25 into the region between the clamping position and the feed cylinder 26. Next, for carding, the cotton is transported by the feed cylinder 26 to the nip of the nipper mechanism 27 and then to the detaching roller 32. The web thus produced is combined into a sliver by the paired sliver-off rollers 34,35,36 and the guide plate 37 and is fed to the drawing mechanism 40 (refer to fig. 4) together with the sliver formed also at the other carding heads. The web formed by the drafting mechanism is combined into a sliver, a so-called combed sliver, and transferred to a coiler for placement in a can.

The combed individual-head sliver then passes through the sliver-out roller pairs 35-37 and is passed in sliver or web form by these sliver-out roller pairs onto a cotton guide plate 37 which is associated jointly with all the combing heads of the machine. The short fibers, clusters and impurities removed from the fibre material by the circular comb 33 and the top comb 38 are sucked as so-called noil through the guide channels into a suction channel which is commonly associated with all the combing heads of the machine. The individual slivers of the different combing heads of the machine are usually run side by side on the card 37 to a common drafting device 40. At the outlet of the drafting mechanism a sliver horn 41 is arranged which forms the web into a combed sliver and then places a combed sliver ring in the can 10.

According to fig. 4, eight combing heads 20 are arranged in the combing machine K shown here, which are each fed by a lap 1 having a width of, for example, 300mm and a fiber mass of 80 ktex. Each roll 1 has a sliver 4 with a length of about 300 m. The carding head 20 produces combed fibre tufts (Faserflor) from the combed sliver 4, respectively, which are combined to form a combed fibre sliver F1 to F8 by means of a sliver funnel 41. Each fiber strand F1 to F8 may have a fiber mass of, for example, 11.25 ktex. The sliver funnel 41 is designed as a measuring funnel, by means of which the output sliver mass of each combing head K1 to K8 is determined. The fiber strands F1 to F8 arrive at the discharge station 39 and travel with a total strand weight of 90ktex through the drawing mechanism 40 to a further sliver funnel 42, which combines all the fiber strands F1 to F8 into a single fiber strand, which is enclosed in the sliver can 10. The drawing mechanism 40 draws the eight fiber strands F1 to F8 18 times to form a single fiber strand having a sliver weight of, for example, 5ktex, and then loops the fiber strand in the can 10 at a loop speed of, for example, 230 m/min. The sliver funnel 42 is designed as a measuring funnel, by means of which the output sliver mass of the combing machine is determined. The electrical signal of each individual busbar horn 41, 42 is transmitted to the control device S via an electrical conductor.

Referring to fig. 1 to 4, it is provided according to the invention that the sliver weight of the fiber sliver F is detected at the sliver funnel 42. Deviations from the nominal sliver weight of combed sliver F are detected and correlated with the unwinding length of lap 1. The unwinding length of the lap 1 is determined by the inverse of the fibre mass at the sliver funnel 42 and the draft at the combing machine K, so that deviations in the fibre mass can be correlated with the winding length in a way of, for example, a few cm. The inverse is carried out in the control device of each combing machine, which displays data either for the user or transmits the data to the upper control device S of the apparatus. The drafting on the winder W is adjusted using the determined data, so that the end of the sliver 4 that is first supplied to each combing head 20 is drafted in such a way that a constant sliver weight is present. The adjustment of the drafting of the end of the sliver 4 by the winder W can be carried out on the drafting mechanism 8 and/or on the press rolls 5,6, 7. Alternatively or additionally, the winding tension on the head end of the tampon 4 at the winding rollers 2,3 can be adjusted by increasing the winding tension on the head end region of the tampon 4 by 0.5% to 5%. With this winding tension, the winding roller 3 runs at a rotational speed 0.5% to 5% higher than the winding roller 2, thereby reducing the fiber quality of the head end of the sliver 4.

The tension can be adjusted and varied on the combing machine K by means of the winding rollers 21,22 and the feed roller 26. In a combing machine K with an automatic winding and stretching process, the tension draft can also be adjusted and varied between the roller 25 and the pressure roller 30 and the feed roller 26. Here, no adjustment of the joining process is required. The process is not affected by the noil outlet, since all the basic settings required for this (top comb, circular comb, opening comb, etc.) on the combing machine are unchanged.

Since each combing machine K1-K6 is equipped with a set of at least eight lap 1, the data for determining the deviation from the nominal sliver weight of each combing machine K1-K6 must also be assigned to eight lap 1, respectively. The winder W thus always produces, for example, a group of eight reels 1, which are assigned to the respective combing machine, for example here to the combing machine K1, by means of a manual, semiautomatic or automatic transport system. This can be done by manual adjustment of the control device of the winder W in that the user stores data about the draft of the length of production of the lap 1 and takes into account the produced sliver weight of the combing machine to be provided accordingly. Alternatively, the control S can use data from deviations from the nominal sliver weight of, for example, the combing machine K1 for the drafting and/or tensioning of the winding machine W for the group of eight reels 1 to be produced, which reels are fed from the transport system T to the combing machine K1. After the optimized group of lap 1 has been delivered to the combing machine, the sliver weight after the drafting mechanism 40 is again checked at the sliver funnel 42 and the deviation from the nominal sliver weight is determined by the unwinding length of the lap 1. With this data, the next group of, for example, eight rolls 1 on the winder W can be further optimized if necessary.

If the combing machine K1 is already equipped, the next eight lap 1 are produced, for example, using the data of the combing machine K4, since this then requires a new lap reserve. This process is carried out in the same way as described in the combing machine K1.

The respective eight reels 1 can be transported manually by the user via the transport system T, for example via a transport trolley, to the respective combing machines K1-K6, wherein the winding machine W can display on the display screen for the user which combing machine K1-K6 the group of reels 1 is assigned.

In the semiautomatic transport system T, the transport trolley is assigned by the control device S to which combing machine K1-K6 the group of lap 1 is to be transported. The user places a group of, for example, eight lap 1 into the combing machines K1-K6 by hand only.

In an automatic transport system T, for example, groups of eight reels 1 are taken from storage after the winder W and transported to the relevant combing machines K1-K6, for example, by a ceiling-mounted conveyor system.

The control device S thus always uses the data about the deviation of the associated combing machine K from the nominal sliver weight to control the production of a group of eight lap rolls 1, for example, and in this case coordinates the transport of the group of lap rolls 1 with the corresponding combing machine K.

The advantage of the described method is that all combing machines can be equipped with simpler and cheaper drafting mechanisms 40, wherein only one pair of drafting mechanisms needs to be equipped with drives in the main drafting. The previous second drive in the main draft can be omitted in the draft mechanism 40, since the optimization of the sliver quality is mainly carried out in the winding machine. This saves costs, since the drive motor is omitted on each combing machine, energy is also saved on the combing machine and a more compact construction of the drafting mechanism is obtained. Finally, the combed sliver is optimized by manual or automatic data exchange between at least one combing machine K1-K6 and the winder W. In this case, the operating data of the winding machine W are adapted to the deviation of the sliver F from the nominal sliver weight at the combing machines K1 to K6 over the winding length.

Depending on the construction of the combing machine, it is now possible to accommodate a group of 4 to 16 lap 1, which are produced with the same parameters in terms of drafting or tensioning in the winder W. Depending on the construction of the winding machine W, the latter can be constructed with two press rolls 2,3, one or more winding rolls and one winding belt or with only winding belts. All the structures of the winder W have in common that the produced sliver 4 is drawn, for example, by means of a drawing mechanism and/or is influenced in terms of speed/rotational speed (tensioning) by a relative movement between the two winding elements.

According to the invention, it is desirable to produce a constant cotton grammage throughout the length of the winding. Alternatively, with the device and the method, the cotton grammage over the winding length may be varied, for example to compensate for process variations on a combing machine. For example, depending on the diameter of the lap, different winding stresses (tensions) are advantageous. The adjusted cotton grammage may be advantageous for optimal combing results. When a new lap is handed over to the combing machine after replacement of the lap, no stress is applied to the lap 1 when the sliver 4 is introduced. Lack of usual draft and thus higher quality fibers are combed. In this case, it may be practical to reduce the grammage of the sliver on the winder W by, for example, 3% to 6% over the respective length of the sliver.

List of reference numerals

1. Cotton roll

1a winding bobbin

2,3 winding roller

4. Sliver

5,6,7 press rolls

8. Drafting mechanism

9. Drafting strip

10. Barrel strip

11,12 bench press roll

13. Steering roller

20. Combing head

21,22 winding roller

23. Transmission device

24. Motor with a motor housing

25. Roller

26. Feeding cylinder

27. Clamp plate mechanism

28. Lever

29. Spring

30. Compression roller

31. Shaft

32. Separating roller

33. Round comb

34,35,36 strip-out rollers

37. Cotton guide plate

38. Top comb

39. Discharging table

40. Drafting mechanism

41. Conducting bar bell mouth

42. Conducting bar bell mouth

Running direction of A, B and C cotton sliver

F, F1-F8 fiber strand

K, K1-K6 combing machine

S control device

T transportation system

W winder.

Claims

1. Device for producing combed fibre sliver (F), comprising a winder (W) and at least one comber, wherein the winder (W) is configured for producing a set of a plurality of lap (1) made of sliver (F) for each comber, the device further comprising a transport system (T) configured for transporting the lap (1) to the at least one comber and to a combing head (20), wherein the at least one comber is configured for producing combed fibre sliver from each lap (1), wherein one or more fibre sliver(s) are subsequently drawn to a single sliver (F), wherein the at least one comber has a measuring device configured for measuring the deviation of the sliver mass of the fibre sliver (F), wherein a control device of the comber is configured for comparing the sliver mass of the sliver (F) with a rated sliver mass and for correlating with the unwinding length of the lap (1), characterized in that by means of these data it is possible to adjust the sliver winding length (1) for the comber and/or to draw down the sliver (4) and/or to adjust the tension speed (W) and/or the tension of the sliver (4) and/or the tension element(s) can be adjusted and/or adjusted between the two tension elements.

2. The device according to claim 1, characterized in that the drafting or tensioning of the sliver (4) in the combing head (20) takes place between the winding rollers (21, 22) and the feed roller (26) or between the pressing roller (30) and the feed roller (26).

3. The apparatus according to claim 1, characterized in that the draft can be varied by means of at least one draft mechanism (8) and/or by means of press rolls (5, 6, 7).

4. The apparatus according to claim 1, characterized in that the winding element is configured as a winding roller (2, 3).

5. Device according to claim 1, characterized in that the data for changing the draft and/or tension on the winding machine are transmitted to the device manually or by means of a control means (S).

6. An apparatus according to claim 1, characterized in that the group of rolls (1) is transported manually, semi-automatically or automatically by means of a transport system (T) to the associated combing machine (K1-K6).

7. The apparatus according to claim 1, characterized in that the measuring device is arranged on or in a sliver horn (42) of a combing machine (K1-K6), wherein the sliver horn (42) is arranged downstream of the drafting mechanism (40).

8. Method for producing combed fibre sliver (F), comprising a winder (W) and at least one comber, wherein the winder (W) produces a set of several lap (1) made of sliver (4) for each comber, transporting the lap (1) to the comber and delivering it to a combing head (20), wherein comber fibre sliver (F) is produced from each lap (1), wherein one or more fibre slivers are subsequently drawn into individual fibre slivers (F), wherein the deviation of the sliver mass of the fibre sliver (F) is measured, the sliver weight is compared with the nominal sliver weight and correlated with the unwinding length of the lap (1), characterized in that the sliver (4) draft and/or tension on the winder (W) can be adjusted for the next set of lap (1) over the winding length and/or the sliver (4) draft or tension on the comber (20) can be adjusted by actuating at least one draft mechanism and/or changing the relative draft speed of the winder (W) and/or tension on the sliver (W) between two winding elements.

9. Method according to claim 8, characterized in that the drafting and/or tensioning of the head end and/or the tail end is adapted to the unwinding length of each lap (1) of a group.

10. Method according to claim 8 or 9, characterized in that the groups of rolls (1) have constant or different cotton grammage over the winding length.

11. Method according to claim 8, characterized in that the data for changing the draft and/or tension on the winding machine are transmitted to the device manually or by means of a control device (S).

12. Method according to claim 8, characterized in that the group of rolls (1) is transported manually, semi-automatically or automatically by means of a transport system (T) to the associated combing machine (K).