EP2313335B1 - Device and method for unwinding and/or winding up webs of material - Google Patents

Description

The invention relates to a device and a method for winding and unwinding webs.
Devices for winding and unwinding webs are known. Often a distinction is made between turret winder and contact winder. Among other things in the EP 1 897 830 A2 is shown a turret winder. The EP 0 270 498 B1 shows a contact winder.
Silk winder types have advantages and disadvantages, of which only a few are listed here. Thus, the construction of a Weridewicklers requires considerable mechanical effort, since full winding shafts, which have a considerable mass, must be swiveled.
The disadvantages of the contact winders include a long cycle time when changing rolls. In this cycle time, alternating winding pressure and the change of other winding parameters can lead to winding of limited quality.
The US 5,346,150 B shows a winder with two in the circumferential direction of the contact roller stationary winding shafts. Such a winder, the winding shafts must be removed at various sampling points.

Therefore, the object of the present invention is to remedy this situation. The object is solved by the claims 1 and 8.

If a second winding nip can be formed in a winding device, which may otherwise largely correspond to a contact winder, for example, the second winding or the second winding may be used during the winding change Winding shaft are made to the contact roller, while the first (old) winding still winding. This is especially true when the angular positions of the Anwickelspalte differ during Anwickelns. This way you can To make sure that an old and a new reel are not in each other's way. It is possible to dispense with its own drive of the winding shafts and to accelerate the second (new) winding shaft only "at rest" by the employment of the rotating contact roller. However, one or two driven winding shaft axes make sense, inter alia, if the contact winding principle often negatively striking Einkupplungs- and synchronization errors are to be avoided permanently. Another advantage of the invention is that the winding parameters can be kept very constant when changing.
For the expression of the two winding gaps advantageously two different adjusting devices can be provided. These can be designed so that they can move their associated winding completely independently.
In each case one of these adjusting devices can each be associated with a winding nip or an angular region of the contact roller in which a winding nip can be formed. These angular ranges can be separate from each other, but they can also overlap.
In addition to the customary with contact winders Anstelleinheiten an XY traversing unit can advantageously be used in or the Anstelleinheiten.

In devices of the type described, the use of a contact roller having a device for cutting the web is advantageous. Particularly recommended in this context are rollers which have a cutting tool in their outer surface, such as a knife. This engages in the cutting movement on the lateral surface of the roller and cuts through the web.

It is also advantageous if the at least one contact roller is equipped such that it can hold or fix at least parts of the track guided on its circumferential surface. This can be done by applying vacuum to openings in the roll surface, by electrical or electromagnetic forces, or the like. The DE 103 21 778 B4 shows a roller that can hold both a web on parts of its surface, as well as on a Cutting tool that can cut the web orthogonal to its transport direction. The passages of DE 103 21 778 B4 , which relate to the maintenance of the web on the roll surface, technical details of the device and process components that cause the holding, as well as the cutting device and its details, are important to the understanding of the present document and are included in the Offenbahrungsgehalt the same.

It is advantageous if a transport device for the removal of finished coils and / or winding tubes is present, which can be brought into operative connection with the adjusting devices that they can take over winding of at least two of these Anstellvorrichtungen and / or can transfer cores to this. This can be done in a common (for the at least two adjusting devices) angular range of the contact roller.
It is advantageous if the first and second winding nips lie on opposite sides of the contact roller. Then the two or more winding processes are as little as possible in the way. A certain or even an absolute symmetry (eg with respect to a line through the center of the contact roller) has further advantages (eg use of the same components on both sides of the contact roller).
A wander of one or more winding nips over the circumference of the contact roller during winding is advantageous. In this case, the winding can change its angular position continuously and optionally during the entire winding. Of advantage, however, is often to spend the still light winding relatively quickly in an end position. This end position may include fixed constraints. Later, the winding can be removed at this end position. In this way, the movement of large (winding) masses can be restricted.
If two or more winding nips are formed on a winding device, preferably during winding, it is advantageous to move the associated winding to a removal position during the respective winding process. This one removal position can also cover an angular range of the contact roller of 20 °, 30 ° or 45 °.

Further embodiments of the invention will become apparent from the description and the claims.

Fig. 1

Eine Seitenansicht einer Wickelvorrichtung bei normalem Wickelbetrieb (erster Betriebszustand)

Fig. 2 bis 15

Seitenansicht der Wickelvorrichtung auf Figur 1 bei einem zweiten bis fünfzehnten Betriebszustand

Fig. 16

Die untere x-y-Verstellung

The individual figures show:

Fig. 1

A side view of a winding device during normal winding operation (first operating state)

Fig. 2 to 15

Side view of the winding device on FIG. 1 in a second to fifteenth operating state

Fig. 16

The lower xy adjustment

Fig. 1 shows a side view of a winding device according to the invention from its operating side. Therefore, of a part of the device components, only the operation side part can be seen.
The device works in FIG. 1 in normal winding operation, which means here that the second web wrap 21 is in an angular position 22 of the contact roller 1, which corresponds to its 21 removal position. The second web wrap 21 is supported by a second winding shaft 5, which is supported by a lower xy adjustment 4. This 4 is articulated as well as the upper xy adjustment 2 on the machine frame, the operator-side shoulder 15 is shown by dashed lines. In this way, it is clarified that this shoulder 15 must be made transparent in order to reveal the view of a large part of the device components shown. The upper xy adjustment 2 carries in turn the in FIG. 1 inactive first winding shaft 3. In both winding shafts 3, 5 is in FIG. 1 not shown that they are normally applied in the winding operation with winding tubes 17, on which the webs 6 are wound.

The contact roller 1 is articulated via a pendulum holder 11 to the linkage 9 at this shoulder 15 of the machine frame. The pendulum holder 11 can be acted upon by the lifting cylinder 10 with a force which, together with the force of the lower xy adjustment 4, the pressure in the second winding nip 23 between the second web winding 21 and the contact roller. 1 certainly. The position of the lifting cylinder 10 can be arbitrarily set along the pendulum holder 11. The possibly swing-out pinch roller 7 is articulated to the machine frame (linkage 9). The web 6 runs in this embodiment of the invention via a series of guide and spreader rollers, not shown, via the pinch roller 7 to the contact roller 1, which is in the form of a vacuum suction-cutting roller.
On this 1 it is further promoted and passes through the winding nip 23 on the second web wrap 21. The direction of the film 6 is represented by the arrowheads 18 and 19, the possibilities of movement of the components of the xy adjustment are indicated by the double arrows 20.

The others FIGS. 2 to 15 illustrate some more work cycles on the same device from the same point of view. In FIG. 2 is opposite FIG. 1 merely additionally shown that the knife 25 from the interior of the contact roller 1 extends beyond the circumference of the contact roller 1 and in this case the web 6 severed. According to the cross section of the web 6, it has a positive effect that the contact roller 1 has the ability to keep the web 6 on its surface. The rear tail 27 runs on the second winding 21 which is finished with it. The front end of the web 26 is transported through the winding nip 23 to the first winding shaft 3, which has meanwhile been placed against the contact roller 1. Here begins the Anwickelprozess on the first winding shaft 3, which leads to the generation of a first web winding 28. This is in FIG. 3 shown. The web located on the winding shaft 3 is in FIG. 3 and dashed lines in some other figures to illustrate that it is at least partially behind the upper xy adjustment 2 on the operator side.

In FIG. 3 the finished second web wrap 21 is already parked by the contact roller 1, while the first winding shaft 3 is employed against the contact roller and forms the first winding nip 29 with this 1.

In FIG. 4 It shows how a finished wrap can be removed. The second web wrap 21 has already been lowered from the lower xy adjustment on the roller removal carriage 8. The service-side part of the lower The xy adjustment 4 has been moved away to the right, wherein the (here only indicated catching bearing 30 has released the operating end of the second winding shaft 5. By moving the roller removal carriage 8 in the direction of the observer, the second winding 21 can now be removed.
The situation resulting from this measure is in FIG. 5 shown: The winding 21 is removed. The initially free second winding shaft 5 has already been provided with a new, still unwound winding tube 17. In FIG. 6 has the operator side 4 of the lower xy adjustment again the user-side end of the first winding shaft 3 in the fishing camp 30 - which is not shown here - added.

In FIG. 7 is the resulting first web wrap 28 on its way from the angular position 31, which he or his winding shaft 3 held at his / her Anwickeln, to the angular position 22, in which he will be removed from the winding device. Meanwhile, the already prepared with the winding tube 17 second winding shaft 5 is spent in a "parking position", which is located near the angular position 32, in which later will be wound on it 5.

In FIG. 8 has first Bahnwickel 28 after his way from the angular position 31, which he had 28 or his winding shaft 3 at his Anwickeln held, the angular position 22, in which he 28 is removed from the winding device reached. In this position, the first web wrap 28 is finished wound. The sooner the first web wrap 28 reaches this "end position", the less mass must be moved in the movement of the roll 28.
It is noticeable that the position in which the first web wrap 28 in FIG. 8 is the position corresponding to the second web wrap 21 in FIG. 1 held. In the illustrated embodiment, both web wraps 21, 28 in this end position, which has the same angular position 22 with respect to the contact roller 1 as the removal position of both rolls, finished wound.

Furthermore, it is noticeable that the winding device is constructed substantially symmetrical to the symmetry line 16. Accordingly, the correspond in the FIGS. 9 to 14 described below processing steps in the FIGS. 2 to 7 already shown processing steps, wherein the rollers of the first and second web windings 28, 21 and the respective winding shafts 5, 3 are interchanged in these figures. So shows FIG. 9 the cross section of the web 6 with the knife 25. This processing step corresponds to the aforementioned limitations of in FIG. 2 illustrated situation. In FIG. 10 the web 6 is wound on the second winding shaft 5. This is equivalent to the winding of the first winding shaft 3 in FIG FIG. 3 ,

In FIG. 11 the transfer of the second web winding 21 to the roller conveyor 8 is shown. It is also advantageous at this point to provide forks, to which the winding shaft 3, 5 is transferred.

FIG. 12 shows the equipping of the winding shaft 5 with the winding tube 17. Here is the drive side upper xy adjustment 12 to see, since the operator-side upper xy adjustment 2 has departed from the second winding shaft 5, wherein the backup bearing 30, the operating end of the winding shaft 5 released Has. The release was of course before the removal of the second web wrap 21 and is already in FIG. 11 to announce. This release is a prerequisite for the removal of the second web winding 21 and the equipping of the second winding shaft 5 with the winding tube 17. Die in FIG. 12 illustrated situation is equivalent to the situation in FIG. 5 ,

In FIG. 13 is that in the Figures 11 and 12 free end of the winding shaft 5 is added again in the backup bearing 30, so that the upper control side xy adjustment 2 again covers the upper drive side xy adjustment 12. This is the situation in FIG. 13 with the in FIG. 6 equivalent to. The meanwhile ( FIG. 12 ) equipped with the winding tube 17 second winding shaft 5 can now be moved into a "parking position".

In FIG. 14 has the winding shaft 5 this "parking position", which has the same angular position 31 as the second winding nip 29 when winding the second winding shaft 5, achieved. However, the employment of the second winding shaft 5 to the contact roller 1 is of course not yet done, since it is still wound on the first winding shaft 3. This is on its way from its Anwickelposition, which is located in the angular position 31 of the contact roller 1, to the angular position 22 of the removal position. In this case also moves the second winding nip 29 between the contact roller 1 and the second web winding 21 in the direction of the angular position 22 of the removal position.
The arrangement of the winding shafts 3, 5 and xy-adjustments 2, 4 corresponds in mirror image (mirrored at the line of symmetry 16) again the situation in FIG. 7 ,

In FIG. 15 is back in the FIG. 1 achieved starting situation. The region in which the upper lower xy adjustment, which comprises an operator-side 4 and a drive-side 14 part, moves the winding shaft along the peripheral surface of the contact roller, thus extends from the angular position 31 (winding position of the first web winding 28) to the angular position 22 (FIG. removal position). The effective range of the upper xy adjustment (drive-side part 12, operating-side part 2) is mirror-inverted relative to the aforementioned line with respect to the symmetry line 16. It extends from the angular position 31 to the angular position 22.

In the in FIG. 15 As shown, the second web wrap 21 can be finished wound and a new lap and web wrap cycle can begin. The whole winding and Bahnwickelwechselzyklus shown can be carried out continuously and without interruptions with the device shown. Any weaknesses of the known winding methods can be eliminated in the manner outlined.

• eine ungenaue Bahnführung beim Rollenwechsel zu vermeiden,
• während des gesamten Rollenwechsels Andruck (im Wickelspalt) zu gewährleisten (ggf. sogar für den alten und den neuen Bahnwickel 21, 28),
• ein reines Kontaktwickeln "nur" mit einer angetriebenen Kontaktwalze 1 durchzuführen,
• ohne Umschlagfalte anzuwickeln
• den Bahnwickeldurchmesser quasi unbegrenzt anwachsen zu lassen (keine Begrenzung durch den Durchmesser des Wendekranzes)
• und es ist möglich, den (mechanischen) Aufwand für das Wickelwellenhandling und die Rollenentsorgung in vernünftigen Grenzen zu halten.

So it is possible in the disclosed manner, compared to the turret winder,

• to avoid an inaccurate web guide when changing rolls,
• to ensure pressure (in the winding nip) during the entire reel change (possibly even for the old and the new web winder 21, 28),
• perform a pure contact winding "only" with a driven contact roller 1,
• without enveloping fold
• to increase the web winding diameter virtually indefinitely (no limitation by the diameter of the turning ring)
• and it is possible to keep the (mechanical) effort for the winding shaft handling and roll disposal within reasonable limits.

• Es ist möglich, zu vermeiden, dass zwei Antriebe (Hilfsantrieb und Hauptantrieb) während eines Wickelvorganges an einer Wickelwelle angreifen, was zu Lastwechseln und Aufwendungen beim Synchronisieren und Einkuppeln der Antriebe führt. Beim oben gezeigten Verfahren kann eine Wickelwelle mit einem Antrieb versehen sein, der permanent während des Wickelns antreibt. Es kann aber auch ein reiner Drehmomentübertrag durch die Kontaktwalze stattfinden. Hierzu kann die noch leere Wickelwelle 17 "frühzeitig" gegen die Kontaktwalze 1 angestellt und von dieser 1 beschleunigt werden, während die andere Wickelwelle noch bewickelt wird. Der Drehmomentübertrag kann während des gesamten Wickelvorganges aufrechterhalten werden.
• Des Weiteren besteht die Möglichkeit zu vermeiden, dass es vor allen bei den Rollenwechseln zu einem ungenauen Andruck des Bahnwickels 21, 28 gegen die Kontaktwalze 1 kommt. Bei der oben beschriebenen Vorrichtung kann während des gesamten Wickelprozesses jedes Bahnwickels 21, 28 die geeignete - oft gleichmäßige Andruckkraft eingestellt werden.
• Schließlich ist es auch möglich, zu vermeiden, dass lange Zykluszeiten entstehen, die unter Umständen sogar zu Unterbrechungen der Produktion bei vor- oder nach gelagerten Maschinen führen können.

Compared to a normal Kontaktwickler offers in the FIGS. 1 to 15 shown device following options:

• It is possible to avoid that two drives (auxiliary drive and main drive) engage during a winding process on a winding shaft, resulting in load changes and expenses in synchronizing and engaging the drives. In the method shown above, a winding shaft may be provided with a drive that drives permanently during winding. But it can also take place a pure torque transfer through the contact roller. For this purpose, the still empty winding shaft 17 can be made "early" against the contact roller 1 and accelerated by this 1, while the other winding shaft is still wound. The torque transfer can be maintained throughout the winding process.
• Furthermore, there is the possibility of avoiding that, above all during roll changes, an inaccurate pressure of the web roll 21, 28 against the contact roll 1 occurs. In the apparatus described above, during the entire winding process of each web winding 21, 28 the appropriate - often uniform pressure force can be adjusted.
• Finally, it is also possible to avoid creating long cycle times, which may even lead to production interruptions in upstream or downstream machines.

At this point it is also noted that was dispensed with the representation of drives, upstream guide and spreader rollers and the like. It should also be noted that a winding core according to the present document is an arbitrarily shaped core of a web winding 21, 28. In the above description, a functional pair of a winding sleeve 17 and one of the winding shafts 3, 5 play the role of a winding core.

In FIG. 16 the function of the xy adjustments is shown once again with reference to an enlarged section of the lower xy adjustment 4. For the purposes of this document, an xy-adjustment is a device that allows the transport or the adjustment of a machine component in a plane (which is spanned by the x and y coordinates). "Xy-adjustment" is a functional term here.
FIG. 16 outlines the function of the xy adjustments shown in the embodiment.
The horizontal rail 34 is hinged in a manner to the operator side shoulder 15 of the machine frame, which permits movement of the horizontal rail 34 in the x direction. The articulation can be accomplished with rollers or rails (straight guide) or in any other way. A drive for the movement is an advantage. On the horizontal rail 34, the vertical rail 33 is articulated so that it can be moved relative to the horizontal rail in the y-direction, if necessary by a drive.

The operator-side xy-adjustments 2, 4 are connected by the winding shafts 3, 5 with the drive-side xy-adjustments 12, 14 and thus also coupled when the backup bearings 30 include the user-side ends of the winding shafts 3, 5.

The operator-side x-y adjustments can also be connected by coupling shafts with the drive-side x-y adjustments. In this case, the coupling shafts can be engaged or released by couplings. It is also possible for the x-y adjustments to be mechanically synchronously completely decoupled from one another by electric drives ("servo").

Finally, it should again be emphasized that two different winding gaps can be realized with the devices shown in the exemplary embodiments. Two different winding nips in this context also means that the winding nips 23, 24 can assume different angular positions of the contact roller or that the winding nips cover different angular regions of the contact roller. In the present embodiment, these angular ranges overlap at least in the angular position 22 of the removal position. In the present exemplary embodiments, the at least two winding gaps 23, 24 can be formed simultaneously. LIST OF REFERENCE NUMBERS 1 Vacuum suction cutting roller / contact roller 2 Upper xy adjustment / first setting device (operating side) 3 First winding shaft 4 Lower xy adjustment / second setting device (operating side) 5 Second winding shaft 6 Train / web 7 pinch roller 8th Log removal cart / transport device 9 Linkage of the (pendulum) holder 11 for contact roller (operating side) 10 lifting cylinder 11 (Pendulum) Holder for contact roller 12 Upper xy adjustment first setting device (drive side) 13 ground 14 Lower xy adjustment second setting device (drive side) 15 Shoulder of the machine frame (operating side) 16 line of symmetry 17 mandrel 18 Arrowhead in the direction of movement of the web 6 19 Arrowhead in the direction of movement of the web 6 20 Double arrows to indicate the direction of movement of the xy adjustment 21 Second web wrap / second wrap 22 Angular position of the removal position 23 Second winding nip 24 First winding gap 25 Cutting means / knife of the contact roller 1 26 Front end of the track 27 Rear end of the track 28 First train wrap / first wrap 29 Second winding nip 30 safety bearing 31 Angular position of the Anwickelns the first web roll (with respect to the contact roller 1) 32 Angular position of the Anwickelns the second web roll (with respect to the contact roller 1) 33 vertical lower xy adjustment rail 4 34 horizontal lower xy adjustment rail 4

Claims (13)

1. Device for winding and/or unwinding material webs, having the following features:

   - at least one contact roller (1) via which the material web (6) is guided toward a winding core (3, 5, 17),

   - at least one first positioning device (2, 12) for performing a relative movement between a winding core (3, 17) and the contact roller (1), by way of which positioning of the two components (1, 3, 5, 17) in relation to one another is effectible, and a first winding gap (24) - at least for commencing winding of the material web (6) - is configurable in a first angular position (31) of the contact roller (1),

   - wherein a second winding gap (23) - at least for commencing winding of the material web (6) - is configurable in a second angular position (32) of the contact roller (1),

   - wherein at least one second positioning device (4, 14) for performing a relative movement between a winding core (5, 17) and the contact roller (1) is provided,

   - by way of which (4, 14) mutual positioning of these two components is effectible and the second winding gap (23, 24) is configurable,

   - wherein the two positioning devices (2, 4, 12, 14) are movable independently from one another,
   characterized in that
   the two winding gaps are movable along the circumference of the contact roller (1).
2. Device according to Claim 1,
   characterized in that

   - by way of the first positioning device (2, 12) for performing a relative movement between a winding core (3, 17) and the contact roller (1), the first winding gap (24) in the first angular position (31) of the contact roller (1) is configurable,

   - and by way of the second positioning device (4, 14) for performing the relative movement between the winding core (5, 17) and the contact roller (1), the second winding gap (23) in the second angular position (32) of the contact roller (1) is configurable.
3. Device according to one of the preceding claims,
   characterized in that
   at least the first positioning device (2, 12), but preferably the first (2, 12) and the second (4, 14) positioning device, comprise(s) an x-y-adjustment unit (2, 12, 4, 14).
4. Device according to one of the preceding claims,
   characterized in that
   the at least one contact roller (1) is equipped with a cutting device (25) for severing the material web (6).
5. Device according to one of the preceding claims,
   characterized in that
   the at least one contact roller (1) is equipped with a unit for holding the material web (6) on the surface of said contact roller (1).
6. Device according to one of the preceding claims,
   characterized by
   a roll-conveying device (8) for receiving and/or delivering web rolls (21, 28) or winding tubes (17) on and from the first (2, 12) and second (4, 14) positioning device, respectively.
7. Device according to one of the preceding claims,
   characterized in that
   the operator-side device constituent parts (2, 4) and the drive-side device constituent parts (12, 14) of at least one of the two positioning devices (2, 4, 12, 14) are movable in a mutually independent manner.
8. Method for winding and/or unwinding material webs (6), comprising the following method features:

   - guiding the material web (6) via at least one contact roller (1) toward a first winding core (3, 17),

   - creating a first winding gap (24) for at least commencing winding of the material web (6) by way of a relative movement between a first winding core (3, 17) and the contact roller (1) in a first angular position (31) of the contact roller (1),

   - wherein for at least commencing winding of the material web (6) onto a second winding core (5, 17) a second winding gap (23) is created in a second angular position (32) of the contact roller (1),

   - wherein at least one second positioning device (4, 14) is used for performing a relative movement between a winding core (5, 17) and the contact roller (1),

   - by way of which second positioning device (4, 14) these two components are positioned in relation to one another, creating the second winding gap (23, 24),

   - wherein the two positioning devices (2, 4, 12, 14) in the course of the winding and/or unwinding process are moved in a mutually independent manner,
   characterized in that
   both winding gaps (23, 24) migrate across the circumference of the contact roller (1).
9. Method according to the preceding claim,
   characterized in that
   the first (24) and the second (23) winding gap lie on mutually opposed sides of the contact roller (1).
10. Method according to the preceding claim,
    characterized in that
    the first (24) and the second (23) winding gap are symmetrical in relation to a line (16) through the centre of the contact roller (1), at least during commencement of winding.
11. Method according to one of the preceding claims,
    characterized in
    that the first (28) and the second (21) web roll are conveyed away from the device for winding and/or unwinding material webs (6), using the same conveying device (8), and/or in that the winding tube (12) for the first (3) or the second (5) winding shaft is brought to the device for winding and/or unwinding material webs (6), using the same conveying device (8).
12. Method according to one of the preceding claims,
    characterized in that
    the first (28) and/or the second (21) web roll during its respective winding process are/is moved toward the transfer point (22) to the conveying device (8).
13. Method according to one of the preceding claims,
    characterized in that
    the axle of the first (28) and/or the second (21) roll during its respective winding process are/is driven by a drive.

Images