EP3368455B1 - Winding machine for web-type materials, and method for winding a web-type material onto winding tubes/cores - Google Patents

Description

The invention relates to a winding machine for web-shaped materials according to the preamble of claim 1. Furthermore, the invention relates to a method for winding web-shaped materials with the features of the preamble of claim 7.

The winding machines described here are used to wind web-shaped materials onto so-called winding tubes. Typically, the material comes directly from the manufacturing process and is put into roll form for further processing or distribution. In particular, different plastics or pulp products come into consideration as web-shaped materials, for example in the form of metal foils, plastic foils, paper webs, fleeces and the like.

First, an initial area of the web-like material is placed on an empty winding tube or roll. A simple attachment to it can take place, for example, by means of a pressure-sensitive adhesive, the rope friction effect or also an air stream. The material web is then wound up by rotating the winding tube. For this purpose, the winding tube is attached to a winding shaft which, in turn, can be driven. The winding shaft is then in contact with the plugged-on winding sleeve in such a way that the sleeve is set in rotation about the longitudinal axis together with the shaft.

As soon as a winding tube is filled up to a predefined winding diameter or filling level and thus the corresponding amount, the The winding process on the filled tube, the so-called finished winding, is completed. This must then be exchanged for an empty winding tube in order to be able to continue the winding process as quickly as possible. A direct exchange of one tube for another on the winding shaft is associated with considerable expenditure of time, especially since a filled winding tube can also have a considerable weight and can therefore only be moved relatively slowly.

In order to keep the times for the transition or change from one core to the next as short as possible, so-called turret winders were created in the past. In this case, several winding tubes are stored in the machine so that they can be driven on separate winding shafts. A filled winding tube can be exchanged for an empty winding tube by pivoting two winding tubes against one another. Thus, a filled winding tube can be moved away from the winding point and an empty winding tube can be moved towards the winding point.

In the US 2010/0294873 A1 describes a winding machine for plastic films with three winding stations and associated contact roller units. From the EP 1 391 406 A1 a winding machine with several swivel arms for positioning winding shafts is known.

However, the particular disadvantage of the known winding machines is that when the winding process changes from a full winding tube to an empty winding tube, either the feed speed of the web-like material has to be reduced in order to attach the material to the empty tube, or the product quality on the winding tube suffers.

The object of the present invention is therefore to be able to ensure a high product quality of the wound material without having to accept losses in the production speed.

This object is achieved by a winding machine with the features of claim 1. In the winding machine, two contact roller units are provided for feeding the web-shaped material. The contact roller units serve to feed the web-shaped material to the winding tubes on the winding shafts. The point at which the web-like material is wound onto the winding tube is also referred to as the winding point. It is particularly advantageous that at least two Winding tubes can each be assigned a contact roller unit. This reduces the time required for the transition from one winding tube to the next, since the normally required change of the contact roller unit from a first winding tube to a second winding tube is dispensed with. In particular, this increases the processing speed when changing the tube.

The at least two contact roller units are preferably movable independently of one another. This ensures that different positions of the winding tubes including different filling levels or winding diameters can be taken into account. The contact roller units can be moved up to the respective winding tubes separately and / or independently of one another. So-called contact roller unit carriers are used to move and in particular to support the contact roller units. In particular, two contact roller unit carriers are provided. These serve to move and / or drive the contact roller units independently. Appropriate movement or drive units are provided for this purpose. The contact roller unit carriers are preferably moved, in particular linearly, preferably displaceable. A rail system is particularly preferably used for this purpose. More preferably, at least one linear drive can be provided. The contact roller unit is mounted on at least one pivotable arm or a rocker. This is used to press against the winding core. Both the upper and the lower contact roller unit carrier are suitable for pressing on the arm or the rocker, in particular by means of a ram.

The at least one contact roller unit can in particular be used separately and / or detachably with the at least one contact roller unit carrier. The or several contact roller units are furthermore preferably interchangeable with one another. This further increases the flexibility of the winding machine. Almost any positioning of the contact roller units relative to the winding tubes is achieved. In particular, the contact roller unit with the web-like material can be brought up to the respective sleeve. Since the contact roller unit is exchangeable, the more suitable or positioned one can be used in each case Contact roller unit carriers carry out, continue or in particular also begin and / or complete the current winding process. For this purpose, the contact roller unit is brought up to the corresponding winding core at the correct location or is stored there.

According to the invention, a parking position is provided for at least one contact roller unit. However, several parking positions can also be provided. This enables a simple exchange of two contact roller units on a contact roller unit carrier. For this purpose, the contact roller unit is parked in the parking position in order to be gripped by a free contact roller unit carrier.

The contact roller unit of the winding tube can preferably be tracked on the winding shaft. This means that the contact roller unit can, for example, track a moving winding core. The tracking preferably takes place by means of the contact roller unit carrier. The tracking can in particular be related to the web-shaped material wound onto the winding tube or its outer contour. Since the filling level of the winding core changes during the winding process, it has been shown that the contact roller unit needs to be adjusted in order to ensure high product quality. This tracking reduces warping of the web-shaped material due to a deflection of the winding shaft due to its own weight. The tracking takes place from radial to tangential direction or feed, here from top to bottom. In addition, however, the aforementioned transport of the winding core can also mean that the contact roller unit needs to be adjusted. The tracking of the contact roller unit is particularly preferably carried out during a turning process of the winding machine. In particular, this is the case when the at least one winding tube and / or winding shaft is pivoted by the winding machine. This ensures that the wrapping process can be carried out and continued without interruption at any time. The tracking of the contact roller units relative to the winding tubes enables a continuous winding process to take place, in particular without reducing the winding speed.

Particularly preferably, the web-shaped material can be taken over by a second contact roller unit with an in particular empty winding tube from another contact roller unit with an in particular filled winding tube. This means that the function of the contact roller units in the winding machine can be exchanged. In particular, the contact roller units can exchange the actual feed of the web-shaped material to the winding point. Accordingly, by transferring or taking over the web-like material from one contact roller unit to the other, a continuous winding process can be ensured even when the winding tubes are changed or exchanged.

In particular, a cross-cutting device is provided for cutting through the web-like material. The severing takes place preferably during a winding process or at its end and / or during a turning process. This means that the cross-cutting device can perform a separation of the web-shaped material in particular when changing or exchanging two winding tubes. In this way, the web-like material can be severed while the winding process is running, in particular in order to achieve a transition from one winding tube to the next. The severing takes place in particular at right angles or at an angle to the material web. More preferably, the cross-cutting device can be moved, in particular independently of the contact roller units or the contact roller unit carriers. Linear movability in one or two axes is particularly preferred. The cross-cutting device has, in particular, a knife carrier, preferably a knife roller. In particular, it is a tangentially attached knife. A serrated knife is preferably used as the knife, more preferably a linear serrated knife. The roller is designed to form an air cushion for the web-shaped material, preferably with a large number of air outlet openings.

The object mentioned at the beginning is also achieved by a method for winding a web-shaped material onto winding cores with the features of claim 7. The method is particularly suitable for implementation by means of a winding machine, as described above. The web-shaped material is brought up to at least one winding tube at a winding point by at least one contact roller unit. The method is characterized in that several winding tubes are continuously wound one after the other with web-shaped material by means of at least two contact roller units. This means that a roll of the web-like material is first wound onto a winding tube in order to then carry out a change to a further winding tube in order to also wind this with further material. This process can of course take place as often as desired. A continuous winding process can thus be achieved. In particular, continuous is understood to mean that there is neither an interruption in the winding process nor temporary reductions in the winding speed. This is achieved by using at least two contact roller units.

It is further preferred that the at least one contact roller unit follows the assigned winding tubes. By means of tracking, it is achieved that even with a movement or translation of the winding tube, in particular also with the material wound thereon, a feed by means of the contact roller unit is possible at any time within the winding machine. The tracking takes place relative to the winding angle, the outer circumference of the web-like material wound on the winding tubes preferably being taken as a reference. This is particularly advantageous since the filling level of the winding tube at the winding point changes continuously during the winding process. Tracking takes place in particular from radial to tangential feed.

Further preferably, a winding tube filled at least almost up to a predefined circumference is moved away from the winding point, preferably pivoted. In particular, at the same time, possibly also with a time offset, an empty winding tube is moved, preferably pivoted, towards the winding point. This enables the winding tubes to be exchanged for one another at the winding point. The material can thus be fed to the winding tubes successively, i.e. one after the other.

The web-shaped material is at least temporarily supplied by at least two contact roller units at the same time. The web-like material can be fed to only one or two winding tubes. In the event of a transition from one winding tube to another winding tube, each of the winding tubes can be assigned a contact roller unit. In this way, a supply to the almost completed winding tube is still provided by means of the one contact roller unit, while a subsequent supply to a still empty winding tube is achieved by a second contact roller unit. An uninterrupted transition from one winding tube to the next winding tube, preferably taking place at full speed, can thus take place. The following contact roller unit takes over the material from the previous contact roller unit.

Particularly preferably, the web-shaped material is severed by means of a cross-cutting device during or after or before the transition from one winding tube to another winding tube. This cross-cutting device can, in particular, be approached to the web-shaped material. The severing is preferably carried out in immediate temporal connection with the transition of the web-like material from one winding tube to the next.

According to the invention, the at least one contact roller unit is parked in a parking position. This serves in particular to enable the contact roller unit on the contact roller unit carrier to be exchanged. Such an exchange can be achieved by the contact roller units being releasably articulated on the contact roller unit carrier. Thus, the contact roller unit carriers can be optimized and positioned for the respective task during the takeover and the winding process.

Furthermore, the web-shaped material is preferably held or supplied to the first winding tube by a first contact roller unit, while the further contact roller unit feeds the material to the second winding tube. The material can be transported to the respective winding core during the winding process. Thus, the simultaneous transport or the simultaneous supply of the web-shaped material with the at least two contact roller units achieved a uniform transition from a first to a second winding tube. In order to achieve the transfer of the actual winding process from one winding tube to the other, the web-like material must be severed accordingly.

More preferably, one of the contact roller units takes over the web material and the feeding to a winding tube from another contact roller unit when the winding tube is wound with the web material at least almost up to a predefined circumference or winding diameter. This means that an automatic switchover or a change of the winding tubes takes place depending on the filling level of the winding tubes in the winding process.

• Fig. 1 eine perspektivische Ansicht einer erfindungsgemäßen Wickelmaschine,
• Fig. 2 eine seitliche Schnittansicht der Wickelmaschine der Fig. 1 beim Bewickeln einer ersten Wickelhülse im Anfahrbetrieb,
• Fig. 3 die seitliche Schnittansicht wie in Fig. 2 beim Wickeln der ersten Wickelhülse,
• Fig. 4 die seitliche Schnittansicht wie in Fig. 2 beim Durchtrennen des bahnförmigen Materials,
• Fig. 5 die seitliche Schnittansicht wie in Fig. 2 beim Herausnehmen der ersten Wickelhülse,
• Fig. 6 die seitliche Schnittansicht wie in Fig. 2 beim Bewickeln einer zweiten Wickelhülse im Produktionsbetrieb,
• Fig. 7 die seitliche Schnittansicht wie in Fig. 2 beim Tausch der beiden Kontaktwalzeneinheiten,
• Fig. 8 die seitliche Schnittansicht wie in Fig. 2 beim Übernehmen des bahnförmigen Materials durch eine der beiden Kontaktwalzeneinheiten von der anderen,
• Fig. 9 die seitliche Schnittansicht wie in Fig. 2 beim Verschwenken der zweiten, gefüllten Wickelhülse und Durchtrennen des bahnförmigen Materials,
• Fig. 10 die seitliche Schnittansicht wie in Fig. 2 beim Herausnehmen der zweiten Wickelhülse und beim Bewickeln einer weiteren Wickelhülse im fortgesetzten Produktionsbetrieb,
• Fig. 11 die seitliche Schnittansicht wie in Fig. 2 beim Bewickeln der weiteren Wickelhülse im fortgesetzten Produktionsbetrieb,
• Fig. 12 die seitliche Schnittansicht wie in Fig. 2 beim erneuten Tausch der beiden Kontaktwalzeneinheiten,
• Fig. 13 die seitliche Schnittansicht wie in Fig. 2 beim erneuten Übernehmen des bahnförmigen Materials durch eine der beiden Kontaktwalzeneinheiten von der anderen, und
• Fig. 14 eine Detailansicht der seitlichen Schnittansicht der Fig. 4 der beiden Kontaktwalzeneinheiten.

Preferred embodiments of the invention are described in more detail below with reference to the drawing. In this show:

• Fig. 1 a perspective view of a winding machine according to the invention,
• Fig. 2 a side sectional view of the winding machine of FIG Fig. 1 when winding a first winding tube in start-up mode,
• Fig. 3 the side sectional view as in Fig. 2 when winding the first winding tube,
• Fig. 4 the side sectional view as in Fig. 2 when cutting through the web-shaped material,
• Fig. 5 the side sectional view as in Fig. 2 when removing the first winding tube,
• Fig. 6 the side sectional view as in Fig. 2 when winding a second winding tube in production,
• Fig. 7 the side sectional view as in Fig. 2 when exchanging the two contact roller units,
• Fig. 8 the side sectional view as in Fig. 2 when one of the two contact roller units takes over the web-like material from the other,
• Fig. 9 the side sectional view as in Fig. 2 when pivoting the second, filled winding tube and cutting through the web-shaped material,
• Fig. 10 the side sectional view as in Fig. 2 when removing the second winding tube and when winding a further winding tube in continued production operation,
• Fig. 11 the side sectional view as in Fig. 2 when winding the further winding core in continued production operation,
• Fig. 12 the side sectional view as in Fig. 2 when exchanging the two contact roller units again,
• Fig. 13 the side sectional view as in Fig. 2 when the web-like material is taken over again by one of the two contact roller units from the other, and
• Fig. 14 a detailed view of the side sectional view of the Fig. 4 of the two contact roller units.

A winding machine 10 according to the invention is shown as an overview in FIG Fig. 1 shown. The remaining figures show lateral sectional views of the winding machine 10, with which the mode of operation or the method steps carried out are intended to be clarified.

The winding machine 10 is used for winding or on winding a web-shaped material 11, so that this is in roll form. The winding machine 10 has for this purpose a machine frame 12 on which the individual components and units, in particular those described below, are attached or mounted.

An assembly of the winding machine 10, designated as a material feeder 13, is used to feed the web-shaped material 11. This is in the Figures 2 to 11 shown on the right side area of the machine frame 12. The material feed 13 has a number of rollers or rollers that are not specified in detail. These serve to deflect the web-shaped material 11, which is fed to the winding machine 10 in the lower region.

This feeding to the winding machine 10 can for example take place directly from a production plant or also from prefabricated rolls of the web-shaped material 11, which are to be rewound into smaller units in the form of smaller rolls or laps, for example. The material feed 13 can also contain, for example, measuring devices or clamping devices.

Since the winding machine 10 shown here is a so-called "turret winder", a bogie 14 is provided as a turning frame with several winding shafts 15. This bogie 14 is designed like a revolver. The three winding shafts 15 are arranged distributed at an angle of 120 ° in the vicinity of the outer circumference of the bogie 14.

The winding shafts 15 each serve to receive a winding tube 16. The web-shaped material 11 is wound onto these winding tubes 16 by means of the winding machine 10. For this purpose, the winding shafts 15 are designed to be drivable. In fact, a common or a separate drive can be provided for each of the winding shafts 15.

The winding tubes 16 positioned on the winding shafts 15 are detachable for this purpose, but are connected to the winding shafts 15 in a rotationally fixed manner. For example, the winding tubes 16 can be slipped onto the winding shafts 15 and clamped there by corresponding clamping elements of the winding shafts 15. For this purpose, the winding shafts 15 can have corresponding tensioning elements which enable the outer cross section of the respective winding shaft 15 to be varied.

Thus, the winding shafts 15 can be expanded in the interior of the winding tubes 16 and thus tensioned. Alternatively or additionally, suitable engaging elements can also be provided on the winding tubes 16 and the winding shafts 15, for example in the form of a toothing or the like.

The winding tubes 16 are fed to the bogie 14 by means of a tube feeding device 17. For this purpose, the tube feeding device 17 has a tube store from which a winding tube 16 can be removed by means of a winding tube feeder 26. For this purpose, drivable rollers or the like are provided on the winding tube feeder 26, which allow a winding tube 16 to be pushed onto a winding shaft 15 through the bogie 14.

For this purpose, the mounting of the winding shaft 15 on the side facing the tube feed device 17 can be removed or the winding shaft 15 can be removed from the bogie 14. The winding tube 16 can then be pushed lengthways onto the winding shaft 15 through a corresponding opening on the bogie 14, or the winding shaft 15 can be inserted into the winding tube 16. Subsequently, the winding shaft 15 is again provided with the corresponding bearing on the bogie 14.

The position on the bogie 14 in which a winding tube 16 can be slipped onto the winding shaft 15 is also referred to as the "insertion point". It is arranged within reach of the tube feed device 17 with the winding tube feeder 26 in the lateral sectional view at the top left of the bogie 14. The position of the winding shaft 15 at which the web-shaped material 11 is correspondingly wound up is also referred to as the “winding point”. It can be found in the side sectional view on the right-hand side of the bogie 14. The "removal point" of a more or less filled winding tube 16 can be found obliquely at the bottom left in the lateral sectional view at the position of the winding shaft 15.

In order to be able to bring the bogie 14 and in particular a winding tube 16 into a corresponding position for feeding, winding or removing a winding tube 16 at the corresponding three positions, the bogie 14 is driven. For this purpose, it is equipped with a ring gear 18 on the outer circumference of the lateral spur gears. A corresponding gear wheel of a drive 19 meshes with this toothed ring 18. The bogie 14 can hereby be rotated about a central, horizontal axis of rotation. Thus, the three winding shafts 15 can each be moved or pivoted from one position to the next

The actual feeding of the web-shaped material 11 to the respective winding tubes 16 to be wound is carried out by means of contact roller units 20, 21. One of the contact roller units 20, 21 takes over the web-shaped material 11 from the material feed 13. The web-shaped material 11 is then fed to the winding tube 16 at the winding point by means of corresponding rollers of the respective contact roller unit 20, 21. This can be done with freely running web-shaped material 11, in particular when starting up the machine. In production operation, however, the respective contact roller unit 20, 21 is brought up to the winding tube 16 with the web-shaped material 11 already wound thereon in such a way that an optimal winding result is achieved by pressing it with a pressure roller or contact roller 31. This optimizes in particular with regard to a smooth positioning of the layers on the one hand and a reduction in the air connection between the layers on the other hand.

The pressing of the respective contact roller 31 against the winding tube 16 is made possible by mounting the contact roller 31 on a respective rocker 39 of the contact roller unit 20, 21. This rocker 39 is pivotably mounted on that of the contact roller unit 20, 21. It can be pressed against the winding tube 16 or the roll by means of a plunger (not shown here).

The contact roller units 20 and 21 are releasably attached to contact roller unit supports 20, 23. The contact roller unit carriers 22 and 23 can be moved linearly within the winding machine 10 by means of separate rail systems 28. In addition, vertical displaceability of the contact roller units 20, 21 on the respective contact roller unit carrier 22, 23 can also be provided. With this, the contact roller units 20 and 21 Position freely within the specified, in particular mechanical, limits relative to the winding tubes 16.

The contact roller units 20 and 21 are of identical design in the present case. Accordingly, they are interchangeable with one another. This ensures that both contact roller units 20 and 21 can be used alternatively to one another, in particular for guiding the web-shaped material 11.

The releasable fastening of the contact roller units 20 and 21 to the contact roller unit supports 22 and 23 means that they can be replaced during the ongoing process. In particular, one contact roller unit 20 can be exchanged for the other contact roller unit 21 or vice versa on a contact roller unit carrier 22 or 23. In order to make this possible, at least one parking position 24 is provided for the contact roller units 20, 21, preferably on the machine frame 12 of the winding machine 10.

The parking position 24 can for example also be arranged directly on one of the contact roller unit carriers 22, 23 or on other components of the winding machine 10. It serves that one contact roller unit 20, 21 is parked there in order to enable the contact roller unit carrier 22, 23 to take over the respective other contact roller unit 21, 20. The then free contact roller unit carrier 23, 22 can then take over the temporarily parked contact roller unit 21, 20 again. In this way, defective or serviceable contact roller units 21, 20 can also be easily exchanged.

For this purpose, the contact roller units 20, 21 have two independent receptacles which can be used on the one hand with a corresponding receptacle of one contact roller unit carrier 22 and on the other hand with a corresponding receptacle of the other contact roller unit carrier 23.

In the present case, the contact roller unit carrier 22 protrudes from above into the feed area. The assigned rail system is consequently arranged in the upper area of the winding machine 10 or the machine frame 12. The contact roller unit carrier 23, however, protrudes from below into the area. The correspondingly assigned rail system 28 of this contact roller unit carrier 23 is accordingly provided on the lower region of the winding machine 10 or the machine frame 12.

The lower end areas of the contact roller units 20 and 21 can be detachably connected or coupled to the contact roller unit carrier 22 and with their upper end area to the contact roller unit carrier 23. Thus, given a suitable relative position of the contact roller unit carriers 22 and 23 to one another, a direct transfer of a contact roller units 20; 21 from one to the other contact roller unit carrier 22; 23 take place. The winding process can thus take place continuously without interruption and, in the ideal case, without reducing the transport speed of the web-shaped material 11.

For example, when changing the winding tubes 16 or the resulting roll of web-like material 11, the so-called finished roll, the web-like material 11 has to be severed. In order to be able to do this during operation, a cross-cutting device 25 is provided. This cross-cutting device 25, like the contact roller unit carriers 22 and 23, is movably supported within the machine room 12 by means of a separate rail system 28.

A corresponding cutting head 30 is adjustable in height on the cross cutting device 25. With the aid of this cutting head 30, the web-shaped material 11 can be cut transversely to the web length during operation. The severing takes place typically in the area between the two contact roller units 20, 21. In this area, the web-shaped material 11 is securely held in the contact roller units 20, 21 so that the severing can take place smoothly. The cross cutting device 25 with the cutting head 30 has a for this purpose Cutting roller or knife roller 40 which carries a knife 41. This knife 41 is typically designed as a serrated knife extending along the knife roller 40.

Both the contact roller unit carriers 22 and 23 and the cross-cutting device 25 are, as already described above, movably mounted on corresponding rail systems 28. This enables, in particular, a linear movement along the rail systems 28. As a rule, a separate drive 29 is provided for each of these units. In this way, an independent process or because of the two contact roller unit carriers 22 and 23 as well as the cross-cutting device 25 can be achieved.

A roller table 27 is used to remove a winding tube 16 typically filled with web material 11 to a predefined filling level or winding diameter from the winding machine 10. The roller table 27 is designed to be height-adjustable and is arranged to be movable within the winding machine 10. It is used to store a filled winding tube 16, a finished roll, as shown, for example, in FIG Fig. 6 you can see. For this purpose, the roller table 27 is lifted under the filled winding tube 16 and this is released from the winding shaft 15. This takes place in particular by pulling the winding shaft 15 out of the winding tube 16. As soon as the filled winding tube 16 is freely deposited on the roller table 27, this can be moved out of the area of the bogie 14. The corresponding winding shaft 15 is thus free again to receive an empty winding tube 16 to be wound.

In the detailed view of the Fig. 14 the two contact roller units 20 and 21 are positioned as in FIG Fig. 4 shown shown. In principle, the two contact roller units 20 and 21 are of identical design. They have a contact roller 31 for pressing the web-like material 11 against the winding tubes 16 or against the web-like material 11 already wound thereon. These contact rollers 31, also referred to as pressure rollers, ensure an optimal layering of the individual layers of the web-shaped material 11, in particular by at least partial removal of air pockets between the individual layers of the web-shaped material 11 on the roll. The at least one rocker 39 or the pair of two rockers 39, on which the contact roller 31 is suspended at the end and is pivotably mounted, is provided for pressing on.

A transport roller 32 ensures that the material is fed to the contact roller 31. A drive wheel 38 also serves to couple the rotation of the contact roller 31 and the transport roller 32. A counter roller 33 is also provided on the upper contact roller unit carrier 23. This ensures that the web-shaped material 11 is reliably guided between the transport roller 32 and the counter roller 33 on the respective upper contact roller unit 20 and 21 on the contact roller unit carrier 23.

Both contact roller units 20 and 21 each have an upper seat 34 and a lower seat 35. These receptacles 34, 35 serve to be coupled with correspondingly corresponding receptacles 36 and 37 of the contact roller unit carriers 22 and 23. A direct transfer of a contact roller unit 20 or 21 from the contact roller unit carrier 22 to the contact roller unit carrier 23 and vice versa can thus take place.

Another special receptacle can be provided for placing the contact roller unit 20, 21 at the parking position 24. This is preferably arranged separately from the other receptacles 34 and 35. Both contact roller unit carriers 22 and 23 can thus freely access the respectively parked contact roller unit 20, 21.

The method according to the invention is described below with reference to the illustrations in FIG Figures 2 to 13 explained in more detail:
In the Figs. 2 and 3 the start-up operation of the winding machine 10 is shown in particular. The starting area of the web-shaped material 11 is wound onto a first winding tube 16 for this purpose. For this purpose, it may first be necessary to attach it to the winding tube 16, for example by means of an adhesive like an adhesive, an air stream or the like. The fastening can, however, also take place, for example, by means of rope friction effects, adhesion, electrostatic forces or the like. The winding process is then started by rotating the winding shaft 15 with the winding tube 16 arranged thereon. If necessary, the contact roller 31 can for this purpose be moved towards the winding tube 16 by means of the rocker 39 in order to press the web-shaped material on.

After a few layers of the web-like material 11 have been applied to the winding tube 16 by appropriate rotation, the contact roller unit 21 is moved or moved towards the winding tube 16. At the same time, the bogie 14 is rotated in order to pivot the partially wound first winding tube 16 to the removal point. In Fig. 4 For this purpose, the severing of the web-shaped material 11 by means of the cross-cutting device 25 is shown. This first winding tube 16 is typically not yet optimally wound due to the start-up operation, so that it mostly does not reach sales.

However, the contact roller unit 20 has now taken over the ongoing winding process from the empty winding tube 16 which is now located at the winding point. The contact roller 31 is in direct contact with the web-shaped material 11 wound onto the sleeve 16 and ensures uniform winding. Since the severing took place during operation, it is no longer necessary according to the invention to slow down or even interrupt the winding process in order to change the winding core.

That in the Fig. 5 shown started winding on the empty winding tube 16 is in the Fig. 6 now continued. The contact roller unit 20, however, is now moved to the parking position 24 by means of the contact roller unit carrier 22 and is parked there. The empty contact roller unit carrier 22 moves below the contact roller unit 21 on the upper contact roller unit carrier 23. At this position, the contact roller unit carrier 22 takes over the contact roller unit 21 from the contact roller unit carrier 23. This is particularly in FIG Fig. 7 outlined. For this purpose, the corresponding receptacles on the contact roller unit supports 22 and 23 or the contact roller units 20 and 21 are opened and closed for coupling, respectively.

The contact roller unit carrier 22, which is now provided with the contact roller unit 21, continues the winding process on the winding tube 16 located at the winding point. For this purpose, the contact roller unit carrier 23 moves to the parking position 24 of the contact roller unit 20 and picks it up. While the winding process is being continued, the bogie 14 pivots the winding tube 16 that is currently wound in the direction of the removal point. Here, the contact roller unit 21 is continuously tracked by means of the contact roller unit carrier 22 of the winding tube 16. This means that the winding process can be continued optimally and without interruption.

The contact roller unit 20, which is now fastened to the upper contact roller unit carrier 23, takes over the web-shaped material 11. Thus, the winding process can be continued at the same time on the now empty winding tube 16, which has meanwhile been pivoted to the winding point. For this purpose, the cross-cutting device 25 again cuts through the web-shaped material 11 in the area between the two winding tubes 16. Since the winding process is continued with the winding tube 16 located on the contact roller unit 20, the now completely filled winding tube 16 can be removed. This is especially true in the Fig. 9 and 10 shown.

The Figures 11 to 13 show again the above-described winding process and changing process of both the contact roller units 20 and 21 and the corresponding empty and filled winding tubes 16. In the Figures 11 to 13 it is again shown how the exchange of the contact roller units 20 and 21 on the two contact roller unit supports 22 and 23 takes place. Thus, in the Figures 12 and 13 practically the original state of the Fig. 7 and 8th has been restored, namely with the contact roller unit 20 on the lower contact roller unit support 22 and the contact roller unit 21 on the upper contact roller unit support 23.

The described method according to the invention can be carried out permanently or continuously, that is to say in particular without interrupting the flow of material. For example, the winding machine 10 can be set up directly following a production machine for web-shaped material 11. According to the invention, it is no longer necessary to slow down the production operation, to interrupt it or to introduce waiting sections in order to carry out winding core changes. This is achieved by the inventive tracking of the contact roller units 20, 21 and the web-shaped material 11 on the winding tubes 16. The winding process can thus be carried out continuously.

List of reference symbols

10

Winding machine

11

sheet material

12th

Machine frame

13th

Material feed

14th

bogie

15th

Winding shafts

16

Winding cores

17th

Casefeeder

18th

Ring gear

19th

drive

20th

Contact roller unit

21

Contact roller unit

22nd

Contact roller unit carrier

23

Contact roller unit carrier

24

Parking position

25th

Cross cutter

26th

Core feeder

27

Roller table

28

Rail system

29

drive

30th

Cutting head

31

Contact roller

32

Transport roller

33

Counter roll

34

upper intake

35

lower intake

36

admission

37

admission

38

drive wheel

39

Swing arm

40

Knife roller

41

knife

Claims (13)

1. Winding machine for sheet materials, with a feed device for sheet material (11), with at least two winding shafts (15), wherein the winding shafts (15) are preferably arranged on a turning frame, wherein each of the winding shafts (15) is designed to receive a winding tube (16) for winding sheet material (11), and wherein the winding shafts (15) can be driven, preferably independently of one another, wherein at least two contact roller units (20, 21) are provided for feeding the sheet material (11) to the winding cores (16) on the winding shafts (15) at a winding point, characterized in that a parking position (25) is provided for at least one contact roller unit (20, 21) in order to enable an exchange of two contact roller units (20, 21) on one of the contact roller unit supports (22, 23).
2. Winding machine according to claim 1, characterized in that the at least two contact roller units (20, 21) are movable independently of each other, wherein at least two contact roller unit carriers (22, 23) are provided for independently moving and/or driving the contact roller units (20, 21), wherein the contact roller unit carriers (22, 23) are in particular linearly movable, in particular displaceable, preferably by means of a linear drive, wherein the contact roller units (20, 21) are preferably mounted on at least one arm or at least one rocker, preferably pivotable.
3. Winding machine according to claim 1 or 2, characterized in that the at least one contact roller unit (20; 21) is separately and/or detachably connectable to the at least one contact roller unit carrier (22; 23), wherein preferably at least two of the contact roller units (20, 21) are interchangeable.
4. Winding machine according to one of the preceding claims, characterized in that the contact roller unit (20, 21) of the winding tube (16) is trackable on the winding shaft (15), preferably by means of the contact roller unit carrier (22, 23), wherein the tracking is related in particular to the sheet material (11) wound onto the winding tube (16) or preferably its outer contour and/or wherein the tracking takes place in particular during a turning process by pivoting the at least one winding tube (16) and/or winding shaft (15).
5. Winding machine according to one of the preceding claims, characterized in that the sheet material (11) can be taken over by a second contact roller unit (21; 20) with an in particular empty winding tube (16) from a first contact roller unit (20; 21) with an in particular filled winding tube (16).
6. Winding machine according to one of the preceding claims, characterized in that at least one transverse cutting device (25) is provided for cutting through the sheet material (11), preferably for cutting through during a winding process and/or a turning process, wherein the cutting takes place in particular at right angles or obliquely to the sheet material (11) and/or wherein the transverse cutting device (25) is movable, preferably independently of the contact roller units (20, 21) or the contact roller unit carriers (22, 23), and/or wherein a knife (41) extending transversely to the sheet is arranged rotatably, preferably on a knife roller (40).
7. Method for winding a sheet material onto winding cores, in particular by means of a winding machine (10) according to one of the preceding claims, wherein the sheet material (11) is fed by at least one contact roller unit (20, 21) to at least one winding core (16) at a winding point, wherein several winding cores (16) are continuously wound one after the other with sheet material (11) by means of at least two contact roller units (20, 21), characterized in that the at least one contact roller unit (20; 21) is parked in a parking position (24) to enable the contact roller unit (21; 23) to be replaced on the contact roller unit carrier (22, 23).
8. Method according to claim 7, characterized in that the at least one contact roller unit (20, 21) is tracked to the associated winding tube (16), preferably to the outer circumference of the wound sheet material (11) on the winding tube (16).
9. Method according to claim 7 or 8, characterised in that a winding tube (16) filled at least almost to a predefined circumference is moved away from the winding point, preferably pivoted, wherein in particular an empty winding tube (16) is simultaneously moved towards the winding point, preferably pivoted.
10. Method according to one of the claims 7 to 9, characterized in that the sheet material (11) is at least temporarily fed simultaneously by at least two contact roller units (20, 21), wherein one contact roller unit (20; 21) takes over the sheet material (11) from the other contact roller unit (21; 20) and/or wherein each of the contact roller units (20, 21) is associated with one of the winding cores (16) in each case.
11. Method according to any one of claims 7 to 10, characterized in that the sheet material (11) is cut by means of a transverse cutting device (25), in particular before or during or after the transition from one winding tube (16) to another winding tube (16).
12. Method according to any one of claims 7 to 11, characterized in that the sheet material (11) is held against the first winding tube (16) by a first contact roller unit (20; 21), while the further contact roller unit (21; 20) brings the sheet material (11) up to the second winding tube (16)
13. Method according to one of the claims 7 to 12, characterized in that one of the contact roller units (20; 21) takes over the sheet material (11) and the feeding from another contact roller unit (21; 20) when the winding tube (16) is wound with the sheet material (11) at least almost up to a predefined circumference.

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