WO2005108263A1

WO2005108263A1 - Method and device for continuously winding up several threads

Info

Publication number: WO2005108263A1
Application number: PCT/EP2005/004676
Authority: WO
Inventors: Manfred Mayer; Karl-Heinz Geidelt; Peter Steinke; Peter Kroll
Original assignee: Saurer Gmbh & Co. Kg
Priority date: 2004-05-06
Filing date: 2005-04-29
Publication date: 2005-11-17
Also published as: CN1950283A; EP1747160A1; DE502005009460D1; CN1950283B; KR20070012538A; JP2007536181A; EP1747160B1

Abstract

Disclosed are a method and a device for continuously winding up several threads to bobbins (5). According to the invention, the bobbins (5) are simultaneously retained and wound on two driven bobbin spindles (7.1, 7.2). Each of said bobbin spindles (7.1, 7.2) is disposed on two rotatably mounted bobbin revolvers (10.1, 10.2) which are provided with two additional driven bobbin spindles (11.1, 11.2) for taking over the threads and continuing the winding process. During the winding process, the threads are fed to the bobbins (5) by means of two pressing rollers (6.1, 6.2) which are allocated to the bobbin spindles and rest against the circumference of the bobbins (5). In order to ensure that all threads are pulled as uniformly as possible off a device that is mounted upstream when changing bobbins on both bobbin spindles (11.1, 11.2), the pressing rollers (6.1, 6.2) are driven at a thread-guiding circumferential speed which is greater than the circumferential speed of the bobbins (5) of both bobbin spindles (11.1, 11.2) when changing the bobbin spindle. To this avail, both pressing rollers (6.1, 6.2) are driven by a joint roller drive unit which is connected to a control device (21) that controls the rotary drive of the bobbin revolvers (10.1, 10.2).

Description

Method and device for continuously winding several threads

The invention relates to a method for the continuous winding of several threads into bobbins according to the preamble of claim 1, as well as a device for carrying out the method according to the preamble of claim 9.

A generic method and a generic device are known from WO 03/068648 AI.

In the known method and the known device, the threads are wound into bobbins simultaneously in two spindles arranged side by side. For this purpose, the winding spindles are each driven by a spindle drive. Each of the winding spindles is assigned to a pressure roller, which is held in a radially movable manner with respect to the winding spindle. During the winding of the threads into bobbins, the freely rotatable pressure rollers rest on the circumference of the bobbins. Both winding spindles are cantilevered on a winding turret. The winding turrets each carry a second winding spindle which is offset by 180 °. By rotating the winding turret, the coils can thus alternately be wound on both winding spindles assigned to the winding turret. To change the bobbin, the winding spindle with the full bobbins in the operating position is moved away from the assigned pressure rollers by rotating the winding turret. At the same time, the respective second winding spindle comes into contact with the pressure rollers to take over the threads.

The known method and the known device have the disadvantage that, due to tolerances in the structure of the device and due to fluctuations in the titer of the thread, bobbins with different diameters can be wound on both winding spindles. Especially in the phase of a bobbin change, in which the bobbin spindles with the full bobbins pull out the threads without contact with the pressure rollers, thread tensioners are fluctuations in tension, which can lead to the yarns twisting, especially in the case of fully stretched threads, inevitable.

Accordingly, it is an object of the invention to develop a method and an apparatus of the type mentioned at the outset in such a way that a uniform draw-off of the threads is maintained on all threads wound at the same time without substantial thread tension fluctuations during a bobbin change.

This object is achieved according to the invention by a method with the features according to claim 1 and by a device with the features according to claim 9.

Advantageous developments of the invention are defined by the features and combinations of features of the respective subclaims.

The invention was also not suggested by the fact that basically winding machines are known which wind several threads on a winding spindle to form bobbins, as is known, for example, from EP 0 391 101 AI. Here, the winding spindle is driven by a spindle drive and the pressure roller by a roller drive. In the phases of a bobbin change, the peripheral speed of the pressure roller is increased in order to keep the thread tension in the thread path above the pressure roller at a certain level. This admittedly advantageously influences the thread feed to a winding spindle. The problem of the simultaneous feeding of several threads to two winding spindles is, however, completely ignored.

The invention has the particular advantage that, in spite of possible different winding diameters, the feed of the threads on both winding spindles is largely determined by the wrapping conditions set between the threads and the pressure rollers. For this purpose, both pressure rollers are at a peripheral speed during the change of the winding spindle Guiding the threads driven, which is greater than the respective bobbin circumferential speeds of the bobbins of both bobbin spindles. For this purpose, the device according to the invention has a roller drive for both pressure rollers, the roller drive being connected to a control device assigned to the rotary drive of the winding turret. This ensures that the changes in the peripheral speeds of the pressure roller can be carried out as a function of the rotary movement of the turret.

The peripheral speed on the pressure rollers is increased preferably by synchronous acceleration of both pressure rollers. For this purpose, the roller drive can each be formed by an electric motor with a transmission means, which connects the two pressure rollers with one another, or by two separate electric motors, which are controlled by a common control unit.

The method variant according to the invention, in which the pressure rollers remain driven during the winding of the coils in such a way that slip adjustment between the coils and the pressure rollers is possible, offers the particular advantage that the differences in the increase in the coil diameter occurring during the winding travel can be advantageously compensated for. The pressure rollers can be driven as well as braked compared to the coils. A slight increase in the pressure roller speed preferably favors the winding of the threads.

A further setting option for influencing the coil structure is given by the method variant according to the development according to the invention according to claims 4 and 5. For this purpose, the pressure rollers are preferably rigidly connected to a height-adjustable holder, so that essentially the same mixed assignments can be held on each winding spindle. In addition, the contact force to be applied by the pressure rollers for the winding of the bobbins on both winding spindles can be adjusted with simple means. In principle, however, it is also possible to connect the pressure rollers to the holder via movable means. In order to be able to operate both winding spindles in operation at identical speeds and thus identical peripheral speeds of the bobbins, each of the winding spindles is driven and controlled synchronously according to an advantageous development of the invention.

The evasive movement required to grow the bobbins during winding of the threads on both winding spindles in operation can be carried out preferably by moving the pressure rollers away by means of the movable holder or by a rotary movement of the two winding turrets, preferably in a synchronous manner. To move the holder, a slide and a slide guide are particularly proposed, by means of which both pressure rollers can be moved synchronously.

Alternatively, however, there is also the possibility of holding the pressure rollers on two movable rockers, which are fastened to the machine frame so that they can be pivoted directly. This development is particularly suitable for the method variant in which the evasive movement is carried out exclusively by rotating the two winding turrets.

In order to ensure that the threads are drawn off and the threads are fed as constantly as possible while the threads are being wound on the two winding spindles, the spindle drives are preferably controlled synchronously to adjust the bobbin peripheral speed. For this purpose, the speed of rotation of one of the pressure rollers is preferably recorded and used as a control variable for setting the winding peripheral speeds. This development of the invention is particularly characterized in that the change in the drive speeds of the winding spindles during the winding of the bobbins by a common one Control loop can be controlled. By means of a control device, a collective change in the drive speeds of the winding spindles is carried out as a function of the respectively measured speed of rotation of the pressure roller such that the speed of rotation of the detected pressure roller remains essentially constant. The second pressure roller, which is not integrated in the control loop, is automatically set to the same state as the pressure roller monitored by a sensor. In order to carry out this method variant, the development of the device according to the invention has a speed sensor which is assigned to one of the pressure rollers in order to detect its speed of rotation. The speed sensor is connected to the spindle drives of the winding spindles in the operating position by a control device to form a control loop. The sensor signal can thus advantageously be used to control both spindle drives.

The method according to the invention is explained in more detail below on the basis of some exemplary embodiments of the device according to the invention with reference to the attached figures.

They represent:

1 to

Fig. 4 shows schematically several views of a first embodiment of the device according to the invention for performing the method according to the invention

5 schematically shows a drive concept of the exemplary embodiment from FIG. 1

6 schematically shows a further drive concept of the exemplary embodiment from FIG. 1

7 schematically shows a view of a further exemplary embodiment of the device according to the invention 1 to 4, a first embodiment of the winding device according to the invention is shown in several views. 1 shows a side view of the exemplary embodiment, FIG. 2 shows a top view of the winding spindles of the exemplary embodiment, and FIGS. 3 and 4 show a front view of the exemplary embodiment in different operating situations. Insofar as no reference is made to one of the figures, the following description applies to all figures.

The embodiment of the winding device according to the invention has two winding positions 29.1 and 29.2 which are formed side by side in a machine frame 12. Here, the winding units 29.1 and 29.2 are arranged in mirror image to a central plane of symmetry. The right winding unit 29.1 thus consists of a winding turret 10.1 rotatably mounted in the machine frame 21. A first projecting winding spindle 7.1 and 180 ° offset are held on the winding turret 10.1 and a second projecting winding spindle 11.1 is held. In the operating situation shown, the first winding spindle 7.1 is in an operating position for winding several threads. The second winding spindle 11.1 is in a change position for exchanging full bobbins for empty bobbin tubes.

In mirror image of the first winding turret 10.1, a second winding turret 10.2 arranged in the same horizontal plane is held in the machine frame 12 in the second winding position 29.2. The winding turret 10.2 carries the projecting winding spindles 7.2 and 11.2. In the operating situation shown, the winding spindle 7.2 is in the operating position and the winding spindle 11.2 is in a changing position.

Both winding turrets 10.1 and 10.2 are coupled to a common rotary drive 30, the winding turrets 10.1 and 10.2 being drivable in opposite directions. The rotary drive 30 is connected to a central control device 21. A spindle drive is assigned to each of the winding spindles 7.1, 7.2, 11.1 and 11.2 held on the winding turrets 10.1 and 10.2. In Fig. 1, the spindle drives 23.2 and 31.2 of the winding spindle 7.2 and 11.2 of the winding unit 29.2 shown. The spindle drives 23.1, 23.2, 31.1 and 31.2 of the winding spindle of both winding positions 29.1 and 29.2 are connected to the central control device 21, as can be seen from FIG. 2. Each of the winding turrets 10.1 and 10.2 is preceded by a pressure roller 6.1 and 6.2 in the thread run. In the winding unit 29.1, the pressure rollers 6.1 cooperate with the winding spindles 7.1 in order to wind several threads 1.1 to form a bobbin. During the winding of the threads 1.1, the pressure roller 6.1 contacts the circumference of the bobbins 9 to be wound.

Correspondingly, in the bobbin 29.2, the pressure roller 6.2 interacts with the bobbin spindle in the operating position in this case 7.2 in order to wind a second group of threads of threads 1.2 into bobbins. Here too, the pressure roller 6.2 rests on the circumference of the coils 9 to be wound.

The pressure rollers 6.1 and 6.2 are rotatably mounted on a holder 13 and rigidly connected to one another by the holder 13. A roller drive 17 is assigned to the pressure rollers 6.1 and 6.2, as shown in FIG. 1.

The holder 13 carries a traversing means 4 arranged upstream of the pressure rollers 6.1 and 6.2. The traversing means 4 is arranged in a central plane of the thread feed between the winding positions 29.1 and 29.2 and has a plurality of traversing thread guides 5.1 and 5.2 for each winding position 29.1 and 29.2, through which the incoming threads 1.1 and 1.2 can be moved back and forth within a traverse stroke. The traversing means 4 can be formed, for example, by a reversible thread shaft which has one or more grooves on the circumference for guiding the traversing thread guides 5.1 and 5.2.

A thread guide carrier 3 is provided on an upper side of the holder 13 and carries two groups of head thread guides 2.1 and 2.2. The head thread guides

2.1 and 2.2 form the thread feed between the winding spindles 7.1 and 7.2. Here, the group of thread guides 2.1 is assigned to winding unit 29.1 and the group of thread guides 2.2 is assigned to winding unit 29.2.

The holder 13 is held vertically movable on the machine frame 12 by a slide 15 and the slide guide 14.1 and 14.2. The carriage 15 is held in the carriage guide 14.1 and 14.2 by a force transmitter 32 such that the pressure rollers 6.1 and 6.2 each have a predetermined contact force while the threads 1.1 and 1.2 are being wound on the respective bobbins 9. In this exemplary embodiment, the force transmitter 32 is formed by two relief cylinder units 16.1 and 16.2, by means of which the total weight of the two pressure rollers 6.1 and 6.2 and of the holder 13 and the components, such as the traversing means 4, which are also attached to the holder 13 is supported. The relief cylinder units 16.1 and 16.2, which engage on both sides of the device on the slide 15, are connected to a control device 21, by means of which the support action of the relief cylinder units 16.1 and 16.2 can be controlled. Thus, the contact force acting between the pressure rollers 6.1 and 6.2 and the coils 9 during winding is determined by a weight fraction of the total weight.

In the embodiment shown in FIGS. 1 to 4, four threads are wound into the bobbins 29.1 and 29.2 to form a bobbin. Basically, the number of threads wound at the same time is an example. One or more threads can be wound simultaneously for each winding unit 29.1 and 29.2. In practice, however, such winding devices are used exclusively for winding a large number of threads.

In order to start a winding process on the winding spindles 7.1 and 7.2, the pressure rollers 6.1 and 6.2 are guided into a lower position by the slide 15 and the relief cylinder unit 6.1 and 6.2. After the threads 1.1 and 1.2 of the thread sheet have been caught on the winding tubes and the thread reserves have been wound, the winding travel begins. During the winding of the coils 9 Relief cylinder units 16.1 and 16.2 are regulated and controlled such that a predetermined contact force acts on the coils 9. The contact force is preferably kept constant during the winding of the threads on the winding spindles 7.1 and 7.2. However, it is also possible to set a specific force profile of the contact force during the winding cycle. For this purpose, for example, the relief pressure in the relief cylinder units 16.1 and 16.2 is set to a predetermined value, sensed and regulated via the control device 21. With such a pressure control, the evasive movement of the carriage 15 can also be advantageously controlled.

The evasive movement required during winding of the threads 1.1 and 1.2 due to the growth of the bobbin 9 can in principle be carried out in this embodiment both by the movably held slide 15 and by the movably held bobbin spindles 7.1 and 7.2. Due to the fixed arrangement of the pressure rollers 6.1 and 6.2 on the holder 13, the coils 9 can grow in synchronization by moving the slide 15.

The rotary drive 30 of the winding turret 10.1 and 10.2 can preferably be operated stepwise or continuously to perform an evasive movement. Both winding turrets 10.1 and 10.2 are coupled to one another by a gear mechanism.

4 shows the exemplary embodiment in an operating situation in which the winding spindles 7.1 and 7.2 are pivoted by activating the rotary drive 30 of the winding turrets 10.1 and 10.2 to change the bobbin. The full coils 9 are released from the contact of the pressure rollers 6.1 and 6.2. In this phase, the control device 21 simultaneously initiates an acceleration of the pressure rollers 6.1 and 6.2 via the roller drive 17. Both pressure rollers 6.1 and 6.2 are accelerated synchronously to a predetermined peripheral speed, which is greater in relation to the peripheral speeds of the full bobbins swung away on the two winding spindles 7.1 and 7.2 is. As a result, a driving thread friction is generated on each of the threads running to the full bobbins 9 of the winding spindle 7.1 and 7.2. The peripheral speed of the pressure rollers 6.1 and 6.2 is thus higher than the thread running speed of the individual threads. This state is maintained during the winding change and is controlled depending on the rotary movement of the winding turret. As soon as a new contact between the pressure rollers 6.1 and 6.2 and the new bobbins of the winding spindle 11.1 and 11.2 takes place, the pressure rollers 6.1 and 6.2 are reset to the original value for the continuous winding of the threads.

To explain the drive concept of the previously described embodiment of the winding device according to the invention, a possible embodiment is explained below with reference to FIG. 5. For reasons of clarity, only the device parts of the winding units 29.1 and 29.2 required for driving are shown schematically in FIG. 5.

In the drive concept according to FIG. 5, the winding spindle 7.1 is coupled to the spindle drive 23.1 in the winding station 29.1. A control unit 24.1 is assigned to the spindle drive 23.1 and is connected to higher-level control devices 21. The coil 9 wound on the winding spindle 7.1 is shown in dashed lines. The pressure roller 6.1, which is also shown in broken lines, bears against the circumference of the coil 9. The pressure roller 6.1 has a roller end 18.1. A speed sensor 20 is assigned to the roller end 18.1, by means of which the rotational speed of the pressure roller 6.1 can be detected. The speed sensor 20 is connected to the control device 21.

The roller end 18.1 of the pressure roller 6.1 is coupled to the roller end 18.2 of the second pressure roller 6.2 by a gear 19. In this exemplary embodiment, the transmission means 19 is mechanically formed by a belt or a chain, so that both pressure rollers 6.1 and 6.2 of both winding positions rotate in opposite directions at the same speed. To drive the gear 19 an electric motor 25 is connected to a drive wheel 33. The drive wheel 33 is coupled to the transmission means 19. A control unit 27 is assigned to the electric motor 25 and is coupled to the control device 21. The control unit 27, the electric motor 25, the drive wheel 33 and the transmission means 19 thus form the roller drive 17.

To drive the winding turrets 10.1 and 10.2, the respective turret axes 34.1 and 34.2 are coupled to one another by a gear 35, for example a chain. The turret axis 34.1 is driven by the rotary drive 30. The rotary drive 30 is controlled by the associated control device 36, the control device 36 being connected to the central control device 21.

In the winding station 29.1, the second winding spindle 11.1 held on the winding turret 10.1 is driven by the spindle drive 31.1 and the associated control device 24.3. The control device 24.3 is coupled to the control device 21.

In the winding unit 29.2, the winding spindle 7.2 is driven counterclockwise by the spindle drive 22.2 in order to wind the threads into bobbins. The pressure roller 6.2 rotates clockwise on the circumference of the coils at a corresponding speed of the pressure roller 6.1. The transmission of rotation between the pressure rollers 6.1 and 6.2 is carried out by the gear means 19. The threads are wound synchronously in both winding stations 29.1 and 29.2, so that the bobbins 9 are constructed identically on each winding spindle 7.1 and 7.2.

The winding spindle 11.2 held in the rest position in the winding position 29.2 can be driven via the spindle drive 31.2 and the associated control device 24.4. The control device 24.4 is connected to the control device 21.

In order to maintain a constant winding speed of the threads, the speed of rotation of the pressure roller 6.1 is continuously detected by the speed sensor 20 and is given to the control device 21. In the tax device 21 is a target speed of the pressure roller 6.1 stored. As soon as an impermissible deviation is detected between the sensed actual rotational speed of the pressure roller 6.1 and the stored target rotational speed of the pressure roller 6.1, a control signal is generated and given to the control units 24.1 and 24.2. The control units 24.1 and 24.2 change the drive speeds of the spindle drives 23.1 and 23.2 in the desired sense. A constant peripheral speed of the bobbins can thus be set during the entire winding of the threads. The spindle drives 23.1 and 23.2 are preferably formed by asynchronous motors or by synchronous motors.

A superimposed load ratio between the roller drive of the pressure rollers 6.1 and 6.2 and the drives of the winding spindles 7.1 and 7.2 can be set by the electric motor 25. The pressure rollers 6.1 and 6.2 can thus act both as a driver and as a brake on the coil surface of the coils. The load ratio is given up and regulated by the control device 21.

In the event that the wound bobbins have reached a predetermined maximum diameter, the rotary drive 30 is activated via the control device 21 and the control unit 36, so that the bobbin turrets 10.1 and 10.2 move in opposite directions in such a way that the bobbin spindles 7.1 and 7.2 also the full spools are led away from the pressure rollers 6.1 and 6.2. At the same time, the electric motor 25 of the roller drive is controlled via the control device 21 and the control unit 27 in such a way that the pressure rollers 6.1 and 6.2 are accelerated to an increased peripheral speed. The gear means 19 ensures that both pressure rollers 6.1 and 6.2 are accelerated synchronously, so that the action on all threads is the same. Thus, bobbin changing operations can advantageously be carried out without affecting the upstream treatment devices or spinning devices, even with a large number of threads, without any significant effect. FIG. 6 shows a further exemplary embodiment of a drive concept for the exemplary embodiment shown in FIG. 1 of the device according to the invention. The drive concept shown in FIG. 6 is essentially identical to the previous exemplary embodiment of a drive concept according to FIG. 5. In this respect, reference can be made to the preceding description, so that only the differences are mentioned here. The roller drive of the pressure rollers 6.1 and 6.2 is formed by the two electric motors 28.1 and 28.2 and a control unit 27 assigned to the electric motors. The control unit 27 is coupled to the control device 21, so that each of the electric motors 28.1 and 28.2 can be operated with the same settings in order to drive the pressure rollers 6.1 and 6.2.

5, the spindle drives 23.1 and 23.2 of the winding spindles 7.1 and 7.2 are each controlled by a control unit 24.1. The spindle drives 23.1 and 23.2 can be designed as synchronous motors or as asynchronous motors. A control unit 24.2 is also assigned to the spindle drives 31.1 and 31.2. The control devices 24.1 and 24.2 are connected to the control device 21.

The rotary drive of the turret 10.1 and 10.2 is formed by two separate rotary drives 30.1 and 30.2, which can be controlled together via a control unit 36. The control device 36 is connected to the control device 1.

The function and the control of the individual drives is identical to the previous exemplary embodiment, so that reference is also made to the previous description at this point.

7 shows a further exemplary embodiment of the device according to the invention schematically in a front view. The exemplary embodiment according to FIG. 7 is essentially identical to the exemplary embodiment according to FIG. 1, so that reference is made to the preceding description and at this point only the differences are shown. Here, the components with the same functions have been given identical reference symbols.

Compared to the previous embodiment, in the embodiment shown in FIG. 7, the pressure rollers 6.1 and 6.2 are pivotably held on the machine frame 12 by two separate rockers 37.1 and 37.2. A swing sensor 38.1 and 38.2 is assigned to the rockers 37.1 and 37.2, by means of which a movement of the pressure rollers 6.1 and 6.2 can be sensed. The stroke sensors 38.1 and 38.2 are connected via signal lines to the control device, not shown here.

The pressure rollers 6.1 and 6.2 are each assigned separate traversing means 4.1 and 4.2 in the thread run. In this exemplary embodiment, each of the traversing means 4.1 and 4.2 is designed as wing traversing. Each of the threads is moved back and forth in its winding position by means of vanes driven in opposite directions.

All components and drives not further explained and shown here are identical to the previous embodiment.

In the operating situation shown, a plurality of coils 9 are each wound on the winding spindles 7.1 and 7.2 in the operating position. While the threads 1.1 and 1.2 are being wound up, the evasive movement is carried out by the rotary drive of the winding turrets 10.1 and 10.2. For this purpose, the stroke movement of the pressure rollers 6.1 and 6.2 is detected by the associated stroke sensors 38.1 and 38.2 and signaled to the control device. As soon as one of the pressure rollers 6.1 or 6.2 assumes an actual position that deviates from a predetermined desired range, a control command for activating the rotary drive of the winding turrets 10.1 and 10.2 is triggered within the control device. The rotary movement of the turret 10.1 and 10.2 continues until the pressure rollers 6.1 and 6.2 have returned to their target range. The drive of the pressure rollers 6.1 and 6.2 is identical to the previous exemplary embodiments, so that during a bobbin change both pressure rollers 6.1 and 6.2 are accelerated to an excessive peripheral speed which is greater than each of the winding speeds of the full bobbins carried away on the bobbin spindles 7.1 and 7.2 ,

The method according to the invention and the device according to the invention are particularly suitable for winding freshly spun threads. The threads can be drawn off from a spinning device or from a treatment device. By ensuring an essentially constant pulling force of the threads, particularly during a bobbin changing process, uniform treatment of all threads in the upstream treatment device or the spinning device can be achieved.

LIST OF REFERENCE NUMBERS

1.1.1.2 thread 2.1.2.2 thread guide 3 thread guide carriers

4,4.1,4.2 traversing means 5.1,5.2 traversing thread guide 6.1,6.2 pressure roller 7.1,7.2 winding spindles in operating position 8.1,8.2 bobbin tube

9.1.9.2 Spool 10.1, 10.2 Spool turret 11.1.11.2 Spool spindles at rest

12 machine frame

13 holders

14.1, 14.2 slide guide

15 sledges

16.1, 16.2 relief cylinder unit

17 roller drive

18.1.18.2 roller end

19 gear means

20 speed sensor

21 control device

23.1,23.2 spindle drive

24,24.1,24.2 control unit

25 electric motor

26 belt drive

27 control unit

28.1,28.2 electric motor

29.1,29.2 winding unit

30 rotary drive 31.1, 31.2 spindle drive

32 power transmitters

33 drive wheel

34.1, 34.2 turret axis

35 gear means

36 control unit

37.1, 37.2 swingarm

38.1, 38.2 stroke sensor

Claims

claims

1. A method for the continuous winding of a plurality of threads into bobbins, in which the bobbins are held and wound simultaneously on two driven bobbin spindles, the threads being fed to the bobbins by two pressure rollers assigned to the bobbin spindles, in which the bobbin spindles are produced by the pressure rollers when the bobbins are finished are guided away and in which two further driven winding spindles for taking over the threads and for continuing the winding are fed to the pressure rollers, characterized in that the two pressure rollers are driven during the change of the winding spindles at a peripheral speed for guiding the threads which is greater than the spool peripheral speed of the spools of both spindles.

2. The method according to claim 1, characterized in that the pressure rollers are accelerated synchronously to the peripheral speed.

3. The method according to claim 1 or 2, characterized in that the pressure rollers remain driven during the winding of the coils in such a way that slip compensation between the coils and the pressure rollers occurs.

4. The method according to any one of claims 1 to 3, characterized in that a contact force generated by the pressure rollers on the bobbins is kept substantially constant during the winding of the threads.

5. The method according to any one of claims 1 to 3, characterized in that a contact force generated by the pressure rollers on the coils is changed according to a predetermined force profile during the winding of the threads.

6. The method according to any one of claims 1 to 5, characterized in that the winding spindles are driven and controlled synchronously.

7. The method according to any one of the preceding claims, characterized in that during the winding, the pressure rollers are guided together by a movable holder to carry out an evasive movement for the growth of the coils.

8. The method according to any one of the preceding claims, characterized in that the peripheral speed of one of the pressure rollers is detected to control the winding peripheral speeds of the bobbins and that the drive speeds of both winding spindles are changed collectively in dependence on the detected peripheral speed such that the rotational speed of the detected pressure roller in remains essentially constant.

9. Device for carrying out the method according to one of claims 1 to 8 with two movable winding turrets (10.1, 10.2), on each of which two winding spindles (7.1, 7.2, 11.1, 11.2) for receiving a plurality of winding tubes (8) for the simultaneous winding of Threads to bobbins (5) are held projecting, with at least one rotary drive (30) assigned to the winding turrets (10.1, 10.2), with several spindle drives (23, 23.2, 31.1, 31.2) assigned to the winding spindles (7.1, 7.2, 11.1, 11.2) ) and with two rotatably mounted pressure rollers (6.1, 6.2) assigned to the winding spindles (7.1, 7.2, 11.1, 11.2) held in an operating position, which are in contact with the circumference of the spools (9) during winding, characterized in that the two pressure rollers (6.1, 6.2) can be driven by a roller drive (17) and that the roller Drive (17) is connected to a control device (21) associated with the rotary drive (30) of the turret (10.1, 10.2).

10. The device according to claim 9, characterized in that the roller drive (18) is formed by a gear means (19) and an electric motor (23), the pressure rollers (6.1, 6.2) being connected to one another in this way by the gear means (19) are that both pressure rollers (6.1, 6.2) can be driven in opposite directions at the same speed.

11. The device according to claim 9, characterized in that the roller drive (18) by two the pressure rollers (6.1, 6.2) associated electric motors (28.1, 28.2) is formed, wherein the electric motors (28.1, 28.2) by a control unit (27) synchronously are controllable.

12. Device according to one of claims 9 to 11, characterized in that the pressure rollers (6.1, 6.2) are rigidly or movably connected to a movable holder (13), so that the pressure rollers (6.1, 6.2) during the growth of the coils ( 9) can be guided together relative to the winding spindles (7.1, 7.2, 11.1, 11.2).

13. The apparatus according to claim 11, characterized in that the holder (13) and / or the pressure rollers (6.1, 6.2) each cooperate with a controllable force transmitter (32).

14. Device according to one of claims 12 or 13, characterized in that the holder (13) is held on the machine frame (12) by means of a slide (15) and a slide guide (14.1, 14.2), by means of which the pressure rollers ( 6.1, 6.2) together perform an evasive movement relative to the winding spindles (7.1, 7.2, 11.1, 11.2).

15. Device according to one of claims 9 to 11, characterized in that - the pressure rollers (6.1, 6.2) are each held on two movable rockers (32.1, 32.2), which rockers (37.1, 37.2) independently of one another the pressure rollers (6.1, 6.2) lead to the winding spindles (7.1, 7.2, 11.1, 11.2) in the radial direction.

16. Device according to one of claims 9 to 15, characterized in that one of the pressure rollers (6.1) is assigned a speed sensor (20) for detecting the speed of the pressure roller (6.1) and that the speed sensor (20) and the spindle drives ( 23.1, 23.2, 31.1, 31.2) of the winding spindles (7.1, 7.2, 11.1, 11.2) are connected to a control circuit by the control device (21).