EP1947043B1 - Winding device - Google Patents

Description

The invention relates to a winding device for winding a continuously tapered material web from successively provided winding shafts to form coils of the material web on the winding shafts according to the preamble of patent claim 1.

Winding devices of the type mentioned are widely known and are used for example for winding continuously tapered material webs made of plastics. Examples of such material webs include single- or multi-layered extruded plastic films, which are fed from an upstream extrusion line of the winding device, as well as nonwoven webs based on meltblown microfibers and / or continuous fibers or combinations of the aforementioned webs.

In these winding devices different designs are distinguished, wherein a common design, from which the invention proceeds, comprises a so-called contact roller, which is rotatably mounted in the winding device and guided over the wound material web before its winding and from there to the winding shaft or the coil forming thereon is delivered. For the purposes of the invention, a contact roller is understood to mean both a roller which is actually in direct frictional contact with the winding shaft or the coil forming thereon, as well as a roller in which a certain gap exists for the winding shaft or the coil forming thereon . which bridges the material web in the delivery of the contact roller on the winding shaft or the coil.

In a known winding device according to DE 42 13 712 C2 the contact roller is provided with a rotary drive, so that the voltage applied to the contact roller winding shaft or the coil forming thereon is rotated by friction in opposite directions to the contact roller and wound the web to the coil. In a to be carried out after reaching the desired coil thickness winding shaft replacement a new winding shaft is placed in the region of the upper vertex of the contact roller on the surface thereof and winds the web after cross cutting the same in this position a few turns until they after discharging the previously wound winding shaft of a a suitable transfer device is moved along the contact roller surface in a winding position, in which then the next forming coil is finished wound.

From the DE 32 12 960 C2 a similar winding device is known, but in addition in the winding station for the winding shaft a separate rotary drive of the same provides, so that then can be dispensed with a friction drive through the contact roller, which in particular when winding the web with a gap between the contact roller and the winding shaft or of the coil forming thereon is necessary.

A disadvantage of the known winding devices is that in the course of a winding shaft change supplied new winding shaft in the Anwickelstation basically by friction, i. the peripheral drive is rotated by the driven contact roller. The applied to the web winding tension and pressure or contact pressure are completely undefined during this time, which can lead to positional offset and wrinkles on the new winding shaft.

In addition, the new winding shaft is based on the transfer from the Anwickelstation in the Aufwickelstation with its own weight less and less the contact roller effecting the friction drive, which is detrimental to a constant contact pressure and can lead to tensile losses due to increasing slip between the contact roller and the forming coil.

A generic winding device is from the WO 94/26641 A known, but which only works in one direction. Another winding device is in the EP-A1-0 912 435 described.

The invention therefore has the task of further developing a winding device of the type mentioned in that the disadvantages of the prior art are avoided.

To solve this problem, the invention proposes the formation of a winding device with the features of claim 1.

Advantageous embodiments and modifications of the invention are the subject of the dependent claims.

The solution according to the invention is based on the winding shaft receiving device comprising two winding shaft receiving stations, each of which serves to receive a winding shaft. Each winding shaft receiving station has its own rotary drive for the recorded winding shaft and both winding shaft receiving stations are independently movable between the Anwickelposition and the removal position, so that both winding shaft receiving stations alternately record a currently wound winding shaft, while the other Wickelwellenaufnahmestaton in a loading position for inserting a new Winding shaft is movable, which is located between the Anwickelposition and the removal position. Due to the completely independent traversability of the two winding shaft receiving stations, the other winding shaft receiving station can thus be equipped in the loading position with a new winding shaft during the winding of the web on a take in a first winding shaft receiving station and before operation of the Quertrennvornchtung be moved to the recorded new winding shaft in the Anwickelposition, so that after actuation of the cross-cutting device, the new winding shaft is located directly in the Anwickelposition and is driven there by the rotary drive of its associated winding shaft receiving station.

Consequently, the winding shafts are already driven from the first contact with the material web during Anwickelns to actuate the cross-cutting device, which also ends the winding, continuously and permanently by the rotary drive of the associated winding shaft receiving station, so that in the simplest way the winding tension by appropriate control of the rotary drive of the winding shaft receiving station can be controlled, from the beginning of Anwickelvorganges to the end of the winding of the web on the coil. A separate rotary drive of the contact roller is thus no longer needed, since even when Anwickeln a new winding shaft no friction drive on the contact roller is required more.

Due to the lack of drive of the contact roller, the winding tension can be measured continuously and independently of a winding shaft change, for example, by a suitable web tension measuring roller is arranged in front of the non-driven contact roller.

Since the insertion position for inserting a new winding shaft in the winding device according to the invention is constant and is provided at a suitable location between the Anwickelposition and the removal position, the winding device according to the invention is also suitable for almost any winding shaft diameter without alterations, which also in the course of the continuous winding of Material web can be varied. The winding device according to the invention thereby achieves a particularly high flexibility.

In the context of the invention is also provided that the winding shafts of the winding shaft receiving stations and their associated rotary actuators are driven in different directions of rotation, so that as required both a so-called clockwise as well as a left-handed winding of the supplied material web in the winding device according to the invention can be effected.

The winding shaft receiving stations are preferably formed with two carriages assigned to the respective shaft ends of the winding shafts, which carriages can be moved on guide rails of the winding station.

In order to ensure that the two winding shaft receiving stations can be moved independently of each other, a separate travel drive is more preferably provided for each carriage, so that mutually associated carriages of a winding shaft receiving station are driven separately from each other and in particular require no mechanical connection with each other, but moved synchronously by suitable drive control can be.

According to the invention, provision is made in particular for one slide each of the winding shaft receiving station to carry the rotary drive for the winding shaft as a drive slide, while the other slide serves as a counter slide only for the further guidance of the winding shaft.

A preferred design of the winding device according to the invention comprises a frame with preferably vertically extending side parts, between which the contact roller and the winding shafts are arranged and the guide rails of the carriages are attached to the side parts. Here, it is provided that the drive carriage with the larger space having rotary actuators arranged on the opposite outer sides of the side parts and are movable along the guide rails, while the only small footprint having counter slide of the winding shaft receiving stations are arranged on the mutually facing inner sides of the side parts and each counter-slide for the preparation of a winding shaft change under the currently wound winding shaft through from the removal position into the insertion position is movable.

In order to ensure a stable support of winding shafts which receive considerable weight during winding with the coil, the winding station preferably has a horizontally extending support for the shaft ends of the winding shafts received in the winding shaft receiving stations, so that the winding shaft receiving stations themselves control the weight forces of the winding shafts and thereupon do not have to wear wound coils. The support can be created for example by appropriate contouring of the side parts of the frame of the winding device according to the invention.

The winding shaft receiving stations are further preferably equipped with retractable bolts for guiding the recorded Wickewelle, the bolts come in their extended position laterally to the shaft ends of the winding shaft to the plant, but are sunk in the process from the removal position to the loading position in the winding shaft receiving stations to not to collide with the currently wound winding shaft and ensure the unobstructed mobility of the winding shaft receiving the new winding shaft receiving station compared to the currently wound winding shaft.

The rotary drives of the winding shaft receiving stations are preferably formed by a drive motor with a downstream coupling, so that the rotary drives coupled after receiving a winding shaft in the winding shaft receiving station and can be disconnected from the winding shaft receiving station before removal of the finished wound winding shaft.

According to a particularly preferred proposal of the winding device according to the invention is also provided that the contact roller is guided relative to the currently wound winding shaft and means are provided for generating a predetermined contact pressure of the contact roller on the winding shaft or the coil forming thereon. As a result of this design, the contact pressure between the contact roller and the winding shaft or the coil formed thereon is effected exclusively via the contact roller, which has a defined and constant mass during the entire duration of the winding process, in contrast to the changing mass of the winding shaft and of itself forming coils, so that the winding device according to the invention during the entire winding process can produce a constant pressure ratio, which has an extremely positive effect on the winding result.

To ensure the relative mobility of the contact roller to the currently wound winding shaft, the contact roller is preferably displaceably guided in an adjustment slide and a linear drive acting on the contact roller, For example, a pneumatic or hydraulic cylinder is provided to produce the predetermined contact pressure of the contact roller.

To perform a winding shaft change in a winding device for winding a continuously tapered material web on successively provided winding shafts to form coils of the material web on the winding shafts, the material web is guided over a rotatably mounted in the winding device contact roller and from this to the winding shaft and the forming thereon Coil delivered. The winding shaft is received in a winding station with a winding shaft receiving device and is rotated by means of a rotary drive and the winding shaft receiving device according to the diameter of the coil forming on the winding shaft relative to the contact roller from a Anwickelposition moved to a removal position. It has a rotary drive for the recorded winding shaft, wherein in a winding shaft replacement exchanged against the wound with the web winding shaft new winding shaft is inserted into the winding shaft receiving device, the material web is separated and the leading end of the web thus formed is wound on the new winding shaft.

The Wicketwellenaufnahmevorrichtung comprises two independently working winding shaft receiving stations and at the beginning of the winding shaft replacement, the winding winding receiving shaft receiving winding shaft receiving station is moved towards the removal position and the other winding shaft receiving station is moved in the opposite direction in a loading position between the contact roller and the removal position. Then a new winding shaft is inserted into this winding shaft receiving station and together with this in the

Moving Anwickelposition, the web separated by the material and wound the leading end of the web on the driven by the rotary drive of the winding shaft receiving station new winding shaft in the Anwickelstation.

Figur 1

in schematisierter Darstellung eine Seitenansicht einer er- findungsgemäßen Wickeleinrichtung in einer ersten Be- triebsweise

Figur 2

die Seitenansicht der erfindungsgemäßen Wickeleinrich- tung in einer zweiten Betriebsweise

Figur 3

die Ansicht der Wickeleinrichtung gem. Pfeil V in Figur 1

Figur 4

die Durchführung eines Wickelwellenwechsels bei der erfindungsgemäßen Wickeleinrichtung in der ersten Be- triebsweise gem. Figur 1

Figur 5

die Durchführung eines Wickelwellenwechsels der erfin- dungsgemäßen Wickeleinrichtung in der Betriebsweise gem. Figur 2.

Further details and embodiments of the winding device according to the invention are explained below with reference to an embodiment in the drawing. Show it:

FIG. 1

in a schematic representation of a side view of a winding device according to the invention in a first mode of operation

FIG. 2

the side view of the winding device according to the invention in a second mode of operation

FIG. 3

the view of the winding device acc. Arrow V in FIG. 1

FIG. 4

the implementation of a winding shaft change in the winding device according to the invention in the first mode of operation gem. FIG. 1

FIG. 5

the implementation of a winding shaft change of the inventive winding device in the operation gem. FIG. 2 ,

In the FIGS. 1 and 3 is a winding device in the manner of a so-called contact roller winder for winding a continuously tapered material web 7, for example, shown originating from an extrusion device plastic film web.

In a frame with vertically extending side parts 1, a contact roller 2 is rotatably mounted in a manner not shown, wherein the contact roller 2 extends between the two side parts 1 of the frame.

Further, a winding station A with two independently operable winding shaft receiving stations 5, 6 is provided, wherein in the in the FIG. 1 shown operating state a winding shaft 3 is inserted into the winding shaft receiving station 5, is driven in rotation by this in the manner explained in more detail below in the direction indicated by arrow and is supported with its shaft ends on a horizontally extending support 13 of the side parts 1.

For winding the material web 7, this is first supplied in the illustrated manner via guide rollers 10, 12 of the contact roller 2, conveyed over a partial circumferential region thereof and then from the contact roller 2 to the winding shaft receiving station 5 located in the rotationally driven winding shaft 3 and the already on it forming coil 70 discharged from wound web 7 and further wound up.

As in particular from the FIG. 3 can be seen, the two winding shaft receiving stations 5, 6 each comprise two carriages, namely a drive carriage 59 and 69 and a drive carriage associated counter carriage 58 and 68. With respect to the with the drawing plane according to FIG. 3 coincident projection plane, the two winding shaft receiving stations with respect to the center perpendicular M mirror-symmetrical structure.

The two drive carriages 59, 69 are equipped with the rotary drive for the winding shaft 3 to be received in the winding shaft receiving station 5, 6, this rotary drive comprising a drive motor 50, 60 with a downstream angle drive 51, 61 and a gear 52, 62. The gear 52, 62 are provided with a downstream and by means of a drive 53, 63 switchable coupling with coupling claws 54, 64, which with appropriate actuation of the drive 53, 63 with the end face arranged on the shaft ends of the inserted winding shaft 3 coupling claws 30 of the winding shaft 3 in Active connection occur, so that then a direct rotary drive of the winding shaft 3 in the winding shaft receiving station 5, 6 via the associated drive motor 50, 60 takes place, which is usually referred to as the central drive of the winding shaft 3.

On the drive carriage 59, 69 opposite side of the recorded in the winding shaft receiving stations 5, 6 winding shaft 3, a counter-slide 58, 68 is provided which does not perform a drive function, but only the lateral guidance of otherwise with their shaft ends 3a on the support 13 of the side parts. 1 overlying winding shaft is used. The counter-slides 58, 68 have for this purpose two by means of pneumatic cylinders 56, 66 as drive on and extendable bolts 55, 65, which on both sides of the winding shaft 3 as shown in the FIG. 1 come to rest in their extended state and take over the side guide of the winding shaft 3, while this is supported with its own weight on the support 13 of the side parts 1.

The drive carriage 59, 69 are formed with such by means of pneumatic cylinders 56, 66 as drives and extendable bolts 55, 65 for lateral guidance of the winding shaft 3.

In the presentation of the FIG. 1 the bolts of the winding shaft receiving station 6 are retracted.

It is understood that the position of the winding shaft 3 on the support 13 during the ongoing Aufwicklungsvorganges a coil 70 and the associated diameter increase must change continuously. As shown in the FIG. 1 the winding device operates in such a way that the located on the winding shaft 3 coil 70 is in contact with the contact roller 2, ie between the coil 70 and the contact roller 2 in the area marked with arrow S no air gap is present, but the device is not limited thereto, but can also be operated with a gap in the area S between coil 70 and contact roller 2 due to the own rotary drive of the winding shaft 3.

However, if the coil 70 deviates from the illustration in FIG. 1 at the beginning of winding on the winding shaft 3 still a small diameter has, wherein the starting diameter of the coil 70 corresponds to the outer diameter of the winding shaft 3, this must in the illustration according to FIG. 1 to be moved to the right on the support 13 to corresponding path, while the position of the winding shaft 3 is gradually shifted to the left on the support 13 with increasing diameter of the forming coils 70.

For this purpose, the carriages 58, 59, 68, 69 of the winding shaft receiving stations 5, 6 are movable in guide rails 14, 140 in the region of the side parts 1 parallel to the support 13, wherein the two drive carriages 59, 69 due to the higher space requirement due to the rotational drive received thereon arranged for the winding shaft 3 on the two outer sides of the side parts 1 and slidably guided in guide rails 14, while the compact-built counter-slides 58, 68 are guided on the mutually facing inner sides of the side parts 1 in corresponding guide rails 140 slidably. By means of independent drives 57, 570 and 67, 670, the drive carriages 59, 69 and counter carriages 58, 68 of a winding shaft receiving station 5, 6 synchronously to each other and independently of the other winding shaft receiving station 6, 5 along the guide rails 14, 140 movable without them one require mechanical connection.

If now the coil 70 on the winding shaft 3, which in the example according to FIG. 1 is inserted in the winding shaft receiving station 5, has reached a predetermined diameter, so a winding shaft change is performed, ie the currently wound winding shaft 3 must be replaced with a subsequent new winding shaft without the supply and winding of the web 7 is interrupted.

For this purpose, as from the FIG. 4 can be seen in uninterrupted winding operation, the winding shaft receiving device 5 with the winding shaft 3 and forming thereon coil 7 first in the direction of arrow P1 to the left in the direction of a removal position A2 proceed, which by corresponding synchronous actuation of the drives 57, 570 of the drive carriage 59 and counter carriage 58th is effected. At the same time a Deflection roller 40 pivoted from a designated 40.1 rest position in a working position in which it comes into contact with the material web 7 before emergence onto the coil 70.

At the same time or at an earlier time, the hitherto not active winding shaft receiving station 6 is moved to a loading position indicated by reference numeral E, which is effected by corresponding actuation of the drives 67, 670. If the winding shaft receiving station 6 has previously been in the removal position A2 prior to the movement into the insertion position E, the movement takes place in the opposite direction to the travel direction of the winding shaft receiving station 5 carrying the currently wound winding shaft 3. However, since the drive and counter carriages 59, 69, 58, 68 are arranged mirror-symmetrically with respect to the central axis M in the projection and are arranged alternately on the outside and inside of the side parts 1, the two winding shaft receiving stations 5, 6 can be operated independently of each other and without collision are passed to each other. Moreover, since the bolts 55 for the lateral guidance of the shaft ends 3a of the winding shafts 3 by means of the pneumatic cylinder 56, 66 are retracted when not in use, the carriage 58, 59, 68, 69 in an operating condition in which they have not yet recorded a winding shaft 3 , drive under the located in the other winding shaft receiving station winding shaft 3 with retracted bolt 55 without collision. In that regard, the two winding shaft receiving stations 5, 6 independently along the guide rails 14, 140 movable

As already explained above, the currently not provided with a winding shaft 3 winding shaft receiving station 6 is moved to the insertion position E and is there by means of a not shown winding shaft 8 according to arrow P2 equipped with a new winding shaft 3, while the web 7 under Deflection by the guide roller 40 is further wound on the coil 70 of the winding shaft 3 located in the winding shaft receiving station 5. However, in the insertion position E in the winding shaft receiving station 6 inserted new winding shaft 3 already in the insertion position E by appropriate actuation of the clutch drive 63 are connected to the drive motor 60 of the winding shaft receiving station 6 and also the bolts 55 for lateral guidance of the winding shaft 3 are now extended.

Due to the coupling of the drive motor 60, the new winding shaft 3 is rotatably driven immediately after its insertion into the winding shaft receiving station 6 from the drive motor 60 in the manner of a central drive. Now located in the winding shaft receiving station 6 and rotatably driven new winding shaft 3 can be brought by moving the winding shaft receiving station 6 to the right in the Anwickelposition A1, in which it depending on the operation of the winding device on the contact roller 2 to the plant or with a certain desired gap is spaced from this. The representation of the winding shaft receiving station 6 provided with reference numeral 6.1 shows this in the Anwickelposition A1, while reference numeral 6 selbige in the insertion position E shows.

Following that, in the meantime, from her in the FIG. 1 apparent rest position in the standby position moved cross-cutting device 4 operated with cutting knife 42 and separates the web transversely to its direction through the winding device, so that the winding ends on the winding shaft located in the winding shaft receiving station 5 winding 3 and the formed leading end of the fed material web 7 directly which is located in Anwickelposition new winding shaft 3 is wound in the winding shaft receiving station 6. Since already on the first revolutions of the new winding shaft 3 in the winding shaft receiving station 6, the rotary drive of the new winding shaft 3 takes place by the drive motor 60, the winding tension of the web on the web 7 is constant and defined controllable even when Anwickeln the new winding shaft 3. As a result, the winding result is enormously improved and a rotary drive of the contact roller 2 can be dispensed with.

Subsequently, the previously wound winding shaft 3 can be removed with the coil 70 from located in the removal position A2 winding shaft receiving station 5, while gradually a new coil 70 on the in the winding shaft receiving station 6 located winding shaft 3 is formed, which is accordingly gradually moved according to the increase in diameter of the coil 70 to the left until a new winding shaft change takes place in which then moved the winding shaft receiving station 5 from the removal position A2 in the insertion position E and equipped with a further new winding shaft 3 becomes, as has already been described above.

Since the insertion position E between the Anwickelposition A1 and the removal position A2 is provided and has a certain distance from the contact roller 2, winding shafts 3 can be used with a wide variety of diameters in the winding device shown, since the respective winding shaft receiving station 5, 6 after the assembly with a new winding shaft in the insertion position E is always actively moved to the Anwickelposition A1, the exact position depending on the winding shaft diameter, which is also the initial diameter of the coil 70 may vary.

The significant during the winding process as a controlled variable winding tension can be controlled in the winding device in the simplest way, including, for example, the guide roller 10 is formed as a web tension measuring roll and always the current acting on the web 7 web of the drives 50 and 60 of the two alternately in use winding shaft receiving stations 5, 6 measures. As soon as the cross-cutting device 4 is actuated during a winding shaft change, the assignment is switched from one drive 50 to the other drive 60, so that a continuous web tension control can take place in front of the contact roller 2.

As from a comparison of the two operating states according to FIG. 1 and FIG. 2 can be seen, the winding device can be operated not only with a first direction of rotation, in accordance with FIG. 1 the contact roller in a clockwise direction and the winding shaft with the coil located thereon 70 moves counterclockwise, which is commonly referred to as left-hand rotation, but the rotary drives the winding shaft receiving stations 5, 6 are also able to operate the winding shafts 3 with the corresponding opposite sense of rotation, which in FIG. 2 is shown and commonly referred to as clockwise is, in which the winding shaft and the coil located thereon 70 moves in a clockwise direction and the contact roller 2 in the counterclockwise direction. Accordingly, in the reverse direction of rotation that side of the wound material web 7, which faces the winding shaft 3 in the left-hand rotation, is now wound facing the outer surface of the coil 70, which may be required for various further processing steps and the like.

The material web 7 is according to FIG. 2 supplied in the second mode of operation of the winding device via guide rollers 10, 11, in turn, the guide roller 10 may be formed as a web tension measuring roll, and from there to the contact roller 2, from which they then transfer to the winding shaft 3 and the forming thereon coil 70 becomes.

The operation of the two winding shaft receiving stations 5, 6 agrees with the above-explained operation in reverse running gem. FIG. 1 coincide, only during the winding shaft change, in the FIG. 5 is shown, another configuration of the cross-cutting device 4 is required.

After the new winding shaft 3 has been inserted into the winding shaft receiving station 6 located in the insertion position E and moved together with it into the winding position A1, as described in 6.1, a deflection roller 41 pivots from a ready position 41.1 into a working position, in which it a loop-shaped diversion of the material web 7 to the new winding shaft 3 to the previously wound coil 70 causes. Then, the material web 3 can be transversely severed by means of the cross-cutting device 4 and the local separating knife 42 in the region between the new winding shaft 3 and the guide roller 41, whereupon the leading end of the material web 7 thus formed directly on the already rotatably driven with the rotary drive of the winding shaft receiving station 6 new winding shaft 3 is wound, so that even in this mode of operation of the winding device a controlled winding tension is maintained.

Since in the previously described winding device, the winding shafts 3 starting during their entire contact with the wound web 7 From the first revolutions of winding up on the new winding shaft 3 material web 7 to operate the cross-cutting device 4 in the manner of a central drive of the rotary drives of the winding shaft receiving stations 5 and 6 are rotationally driven, the above-described winding device can do without its own drive the contact roller 2. This is merely rotatably mounted in the side parts 1 of the frame and rotated by the circumferentially guided over the surface material web 7 as a result of the train of the drive motors 50 and 60 of the web 7.

If the winding device is to be operated as a contact roller winder with a superficial contact between the contact roller 2 and forming on the winding shaft 3 coil 70, formed without rotary drive contact roller 2 as shown in the FIG. 6 be slidably guided in an adjusting slide 20 relative to the currently wound winding shaft 3, said adjusting slide parallel to the support 13 and the guide rail 14, 140 in a manner not shown along the side parts 1 is displaceable. In addition, linear drives in the form of pneumatic or hydraulic cylinders 21 are provided which are supported on the one hand stationary on the frame, on the other hand act in the direction of displacement of the Verstellschlittens 20 on the contact roller 2 and thus a defined contact pressure of the contact roller 2 on the surface of the currently wound winding shaft 3 and of the coils 70 formed thereon in the area of the gap S. Since the diameter and thus the mass of the contact roller 2 does not change during the entire Aufwicklungsvorganges of the coil 70, thus a constant contact pressure of the contact roller 2 with respect to the currently wound winding shaft 3 and the coil forming thereon 70 produced and measured in a simple manner and be regulated.

By the, during the entire winding process in use central drive of the winding shaft 3 in the winding shaft receiving station 5 and 6 takes place in the above-described winding means a controlled winding of the winding shaft from the core to the finished coil, the friction clutch commonly used by a driven contact roller during Anwickelvorgang after the cross-cutting of the web through the central drive is replaced and therefore the drive of the contact roller can be omitted. An uncontrolled winding of the web on a new winding shaft with the usually associated positional offset and wrinkling is thus counteracted. The winding result is improved enormously and the winding device can be operated trouble-free and reliable even at very high feed rates of the web 7.

Claims (11)

1. Winding device for winding a continuously feeding material web (7) on successively provided winding shafts (3) with the formation of coils (70) of the material web (7) on the winding shafts (3), comprising

   - a contact roller (2), which is rotatably mounted in the winding device, via which the material web (7) to be wound can be guided and delivered to the winding shaft (3) or the coil (70) forming thereon,

   - a winding station (A) with a winding shaft receiving device for the receiving and rotatable mounting of a winding shaft (3), the winding shaft receiving device being displaceable, in accordance with the diameter of the coil (70) forming on the winding shaft (3), relative to the contact roller (2) from a winding position (A1) to a removal position (A2) and having a rotary drive for the received winding shaft (3),

   - a winding shaft feed (8) for feeding a new winding shaft (3), which is to be exchanged for the winding shaft (3) wound with the material web (7), into the winding shaft receiving mechanism,

   - a transverse separating device (4) for the transverse separation of the material web (7) in the course of the winding shaft exchange,

   wherein the winding shaft receiving device comprises two winding shaft receiving stations (5, 6), which in each case have their own rotary drive for the winding shafts (3) and can be moved independently of one another between the winding position (A1) and the removal position (A2) and the winding shaft receiving stations (5, 6) alternately receive a winding shaft (3) currently to be wound, while the respective other winding shaft receiving station (6, 5) can be moved into an insertion position (E) to insert a new winding shaft (3) between the winding position (A1) and the removal position (A2) and can be moved into the winding position (A1) before actuation of the transverse separating device (4) with the received new winding shaft (3), characterised in that the winding shafts (3) can be driven in a different rotational direction by the winding shaft receiving stations (5, 6).
2. Winding device according to claim 1, characterised in that the winding shaft receiving stations (5, 6) comprise two slides (58, 59, 68, 69) which are associated with the respective shaft ends of the winding shafts (3) and can be moved on guide rails (14, 140) of the winding station (A).
3. Winding device according to claim 2, characterised in that a separate movement drive is provided for each slide (58, 59 or 68, 69).
4. Winding device according to claim 2, characterised in that a separate movement drive is provided for each slide (58, 59 or 68, 69).
5. Winding device according to any one of claims 1 to 4, characterised in that a frame with side parts (1) is provided, between which the contact roller (2) and the winding shafts (3) are arranged and the guide rails (14, 140) of the slides (58, 59, 68, 69) are fastened on the side parts (1), the drive slides (58, 68) being arranged on the mutually remote outer sides of the side parts (1) and the counter-slides (59, 69) being arranged on the mutually facing inner sides of the side parts (1) and each counter-slide (59, 69) being movable underneath the currently wound winding shaft (3) from the removal position (A2) into the insertion position (E).
6. Winding device according to any one of claims 1 to 5, characterised in that the winding station (A) has a horizontally extending support (13) for the shaft ends (3a) of the winding shafts (3) received in the winding shaft receiving stations (5, 6).
7. Winding device according to any one of claims 1 to 6, characterised in that the winding shaft receiving stations (5, 6) are equipped with retractable bolts (55, 65), to guide the received winding shaft (3).
8. Winding device according to any one of claims 1 to 7, characterised in that the rotary drives of the winding shaft receiving stations (5, 6) comprise a drive motor (50, 60) with a downstream coupling (54) for coupling and uncoupling the drive motor (50, 60) to the received winding shaft (3).
9. Winding device according to any one of claims 1 to 8, characterised in that the contact roller (2) is displaceably guided relative to the currently wound winding shaft (3) and means are provided to produce a predeterminable contact pressure of the contact roller (2) on the winding shaft (3) or the coil (70) forming thereon.
10. Winding device according to claim 9, characterised in that the contact roller (2) is displaceably guided in an adjustment slide (20).
11. Winding device according to either of claims 9 or 10, characterised in that a linear drive (21) acting on the contact roller (2) is provided as the means to produce a predeterminable contact pressure of the contact roller (2).

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