EP1151947B1 - Method for leading several partial webs being cut from one web onto partial rolls and winding device - Google Patents

Description

The invention relates to a method for feeding a plurality of partial webs cut from a material web onto partial web rolls, in which the beginning of the material web is introduced into a winding device, the material web is conveyed in a first path, which leads to a disposal device, through the winding device until it is in is present in full width and cut into the partial webs, and, as soon as the partial webs are present, they are severed transversely to their direction of travel. The invention further relates to a winding device for winding partial webs cut from a material web into partial web rolls with a contact roll on which the partial web rolls rest during winding, a longitudinal cutting device and a threading section with means for feeding a material web beginning to the contact roll, wherein the threading section forms part of a first path formed by the Wikkelvorrichtung which leads to a disposal facility, and in the first path a cross-cutting device is arranged.

Such a method and winding device are known from US 5 842 664 A. There, the web is removed by means of a suction roll from the surface of a spool and wound on the suction roll to exert a corresponding train on the web. Before the suction roll, a cutting device is arranged, which consists of the material web cuts a wedge-like beginning. This wedge, which accordingly does not run over the entire width of the material web and thus is easier to handle, is guided by a cutting device and various deflection to the actual winding station, which is formed by two support rollers. The material web is passed away over the front support roller and guided into a pulper.

The invention will be described below with reference to a paper web as an example of a material web. However, it is also applicable to other webs that need to be wound in a similar manner to bobbins.

Paper webs are usually produced with relatively large widths of up to 10 m, which are no longer manageable for a later user, for example, a printing company. In one of the last method steps, therefore, the paper web is cut into a plurality of sub-webs in the longitudinal direction and each sub-web is aufgewikkelt on a winding roll or Teilbahnrolle. In most cases, the partial web rolls are applied to a contact roller in order to be able to exert a certain influence on the winding hardness of the partial web rolls via the contact pressure. The partial web rolls then have widths in the range of 0.3 to 3.8 m and reach roll diameters in the order of 0.8 to 2.5 m. These rolls are ready to ship after they are packaged and can later be handled by a user.

Before starting the winding, it is necessary to ensure that the partial webs are guided into the corresponding winding positions where roll cores are usually present. For example, the roll cores may be in a winding bed when a double take-up roll winder is used as the winding device. The roll cores can also be mounted on roll holders when the winding device is designed as a support or contact roller winder. Since the partial webs are cut from the same material web, they are fed simultaneously, so to speak, and must therefore be handled simultaneously. This requires a relatively large amount of personnel, especially if a web of the winding device is fed again. In this case, the paper web is torn in a V-shape for better handling during the later following threading process. The thus prepared material web is manually on a settlement preferably centrally arranged in the winding device conveying elements, which form a Einfädelabschnitt supplied. The conveyor transports the V-shaped web until it is wound, ie the location in the winding device where the winding positions are arranged. The material web is drawn out of the machine by hand on this winding by the operator until it is in full width. Only then can the knives of the longitudinal cutting device be pivoted into the material web. If the material web is pulled further, thereby the partial webs are cut. The material web must be continued until the partial webs are finally present at the take-up. Only then can the partial webs be fastened to the sleeves and wound onto the sleeves. This Aufführvorgang requires because of the large web widths and sometimes many partial webs high personnel costs.

DE 37 10 039 A1 shows a device for drawing a material web into a machine for treating the material web, in particular in a roller, in which the V-shaped tip of the material web is pulled with the aid of a cable guide to the plant to a support roller. From there it is conveyed to the winding positions.

A comparable device for drawing a paper web in a rolling machine is shown in DE 37 10 147 A1. There, the tip of the paper web is gripped by means of an elevator and guided from below to a support roller, which is provided with suction openings.

DE 37 10 143 A1 shows a web-feed device on rolling machines, in which also a kind of elevator is used for the tip of the material web.

The invention has for its object to simplify the listing of a material web.

This object is achieved in a method of the type mentioned above in that the Teilbahnanfänge formed by the cutting by a switch arrangement in a second path, which branches off from the first path, are guided to winding positions.

This procedure achieves a substantial simplification of the Aufführvorgangs. The material web is quasi disposed of as long as it is not yet useful. It passes through the first path through the winding device, as long as the partial webs are not yet available. This initially affects the beginning of the web until the web has been threaded with its entire width in the winding device. Even after that, the material web is disposed of further, and that until such time as the partial webs have been threaded sufficiently far into the winding device. It is quite possible that one begins with the longitudinal cutting of the partial webs before the material web is present over the entire width in the winding device. Since in this case the outermost slitting knives may only be used later, such an approach will remain the exception. Only when the partial webs have been advanced to a point in the winding device, where they can be handled more or less automatically are, the web is interrupted by being cut or cut transversely to its direction of movement. The material web starts thus formed can then be fed directly to the individual winding positions. Since you can run the process to cross-cutting more or less automatically, only relatively few workers are necessary for this. Basically, the implementation of the partial webs can be realized on the hubs with a single operator.

Preferably, after being severed, the partial web starts are taken in to a transport device. As long as the web is still supplied to the disposal facility, you can pull it from the front or otherwise transport. In most cases, a train, for example, in the middle of the material web will be sufficient to pull the adjacent partial webs, which are still connected to each other at the beginning. However, when the part webs have been singulated by the transverse cutting of the web, it becomes more difficult to handle them together. If you suck the Teilbahnanfänge to the transport device, then they are held there with the necessary security to be transported to the winding positions.

Preferably, a nip is formed between the transport device and a peripheral pressure device in which the material web is held while being carried on. This nip does two things. On the one hand, the material web is held in this nip when it is severed transversely. Here is a certain hold advantageous to generate a tensile stress. A cutting process can usually do better, when the web is under a certain tension. In addition, you can also achieve by holding in this nip that the material web is applied to the transport device when it is to be sucked there. This improves the connection of the Teilbahnanfänge with the transport device.

Preferably, the nip is opened before the partial webs are wound onto the partial web rolls at a higher speed. To perform the winding device will run only relatively slowly, for example in a crawlspace. If the web moves slowly, then the benefits of a closed nip outweigh. For actual winding, however, the winding device is operated at higher speeds, for example 2000 to 3000 m / min. In this case, the closed nip would offer too much resistance. If you then open the nip, then you have this problem eliminated again.

Preferably, the nip is opened after the partial webs have been attached to the roll core. If the partial webs have been attached to the roll core, then they have a balancing support, so that the nip is no longer necessary.

Preferably, the partial webs are blown after severing the material web to the transport device. It is usually not possible to arrange the cross-cutting device, which is required for cross-cutting the material web, directly in the nip. Rather, the cross-cutter will be a predetermined distance behind it. Accordingly, after cutting, the beginning of the partial webs would hang down and possibly the further transport and the installation complicate the Teilbahnanfänge to the hubs. If you blow the Teilbahnanfänge now after cutting to the transport device, then the Teilbahnanfänge are completely on the transport device and can be promoted accordingly with a good result to the winding positions.

The object is achieved in a winding device of the type mentioned above in that a points arrangement of the cross-cutting device is arranged adjacent to where a second path begins by the winding device, which leads to at least one winding position.

With this embodiment of the winding device, the method described above can be realized particularly well. The material web may pass through the winding device in the first path, the first path terminating in the disposal device. In other words, the part of the web that can not be wound up, disposed of immediately, which greatly facilitates the handling when performing. Only then, when the material web has been introduced into the winding device so far that one has made by a cross-cutting the beginnings of all partial webs, the course of the partial webs is changed by the winding device. The switch arrangement now directs the partial web beginnings over the second path to the winding positions.

It is preferred that the switch assembly comprises a peripheral pressure device, which forms a nip with the contact roller, and a suction device which acts through the contact roller on the material web. By the pressure device to get a defined point at which the web or later the Teilbahnanfänge can branch off from the first path in the second path. The change of direction per se is caused by the suction device which sucks the material web through the contact roller, i. the Teilbahnanfänge sucks on the surface of the contact roller.

The pressure device preferably has a displacement drive. So you can remove the pressure device from the contact roller or bring her to the plant. This is particularly advantageous for the subsequent winding process, in which one wants to avoid pressurization of the material web, especially at higher speeds.

Preferably, the cross-cutting device is provided with a blowing device. The blowing device can blow the beginning of the partial webs after the cutting to the contact roller to improve the adhesion there.

Advantageously, the switch is arranged below a horizontal plane through the axis of rotation of the contact roller. This has the advantage that the material web, as long as they can not be supplied to the Wikkelpositionen in the desired form, simply "down" can fall, so that their disposal is easier.

Preferably, the first path leads into a pulper opening or a chopper entrance. You can feed the web, as long as you can not use them, directly to the pulper, which is particularly advantageous in a paper mill. But you can also feed them to a shredder, which first cuts or chops the web into small pieces, and then later bring them to a suitable recycling.

Fig. 1

eine erste Ausführungsform einer Wickelvorrichtung,

Fig. 2

eine zweite Ausführungform einer Wickelvorrichtung,

Fig. 3

einen Ausschnitt der Vorrichtung nach Fig. 1 in vergrößerter Darstellung, und

Fig. 4

den Ausschnitt in Parkstellung der Vorrichtung.

The invention will be described below with reference to preferred embodiments in conjunction with the drawings. Herein show:

Fig. 1

A first embodiment of a winding device,

Fig. 2

a second embodiment of a winding device,

Fig. 3

a detail of the device of FIG. 1 in an enlarged view, and

Fig. 4

the cutout in parking position of the device.

Fig. 1 shows a winding device 1, which is designed as a double carrier roller winder. The winding device 1 has a first support roller 2 and a second support roller 3, which together form a winding bed 4, in which several partial web rolls 5 can be wound in the axial direction next to each other. From the side view of Fig. 1, only the end face of the axially outermost part web roll 5 can be seen. The partial web rolls 5 can be pressed into the winding bed 4 by a loading roller 6 at the beginning of the winding process to increase the winding hardness, as is known per se. A likewise known per se blow box for generating a compressed air cushion in the winding bed 4, which serves to contribute to a weight relief of the partial web rolls 5, may also be provided and is not shown for reasons of clarity.

A material web 7 is fed via a plurality of deflection rollers 8-10 of the first support roller 2, specifically the underside thereof. Between the pulleys 9, 10, a longitudinal cutting device 11 is arranged, with two rows of blades 12, 13, which drove apart, or, as shown, can be driven together. In the last state, they dip into the material web 7 and produce a series of partial webs arranged parallel to one another.

If the web 7 is to be re-listed, for example, when a tambour from which it is unwound, is empty, then the tip of the web 7 is torn or cut in a V-shape. This can already be done directly after the last winding before the winding device or in the last station before the settlement on the winders. As a result, this process is not time-critical. The material web 7 is, as is known in principle, transported by below preferably centrally arranged conveyors to below the support roller 2. As soon as the tip has arrived there, a nip 15 is formed between the carrier roll 2 and the press roll 14 with the aid of a press roll 14. In this nip 15, the material web 7 is clamped and can then be transported by train until it has arrived at full width on the support roller 2. Once the full web width the Longitudinal cutting device 11 has passed, the rows of blades 12, 13 can be pivoted into the web to produce the longitudinal sections and thus the partial webs. During this entire time, ie from the time when the tip of the material web 7 reaches the nip, to the time at which the incipient partial webs reach the nip 15, the material web can be passed directly into a pulper opening 16. It is therefore disposed of immediately and does not bother.

Below the press roll 14, as can be better seen from Fig. 3, a separator 17 is arranged. The separating device 17 is designed so that it can sever the material web over its entire width more or less abruptly. However, this cutting can also be done by a traversing cut. Shown is an extendable blade 18 with a drive 19, wherein the knife 18 cooperates with a counter-holder 20 shown in dashed lines. Between the press roll 14 and the separator 17, a blower tube 21 is arranged, which can be activated simultaneously with the separator 17 and blows the partial web starts formed by the transverse cutting of the web 7 on the circumference of the first support roller 2.

The support roller 2 has in its periphery a plurality of holes 22 which connect the circumference with its hollow interior 23. The interior 23 is connected to a suction device, not shown, which can be switched on or off. Furthermore, means are provided in a manner not shown to limit the suction of the first support roller 2 to certain peripheral areas. The suction device is activated together with the separator 17, so that the beginning of the partial webs, which is blown by the blowing device 21 on the circumference of the first support roller 2, is held there.

Now, if the first support roller 2 continues to rotate, then reach the Teilbahnanfänge together with the support roller 2 in the winding bed 4 and can be determined there on the roll core 24, for example by an adhesive. Once the Teilbahnanfänge to the roll cores 24 are sufficiently fixed, the press roll 14 can be lifted from the first support roller 2. For this purpose, a displacement drive 25 is provided, for example in the form of a pneumatic piston-cylinder arrangement. This situation is shown in Fig. 4, where the press roll 14 has been lifted by means of the drive 25 from the circumference of the first support roller 2.

By applying a glue line on all partial webs, this system can also be used to create a splice point after paper tear.

Fig. 2 shows a slightly modified embodiment. Here, the winding device 1 'is designed as a back-up roll winder. Identical parts are provided with the same reference numerals and corresponding parts with primed reference numerals.

The partial web rolls 5 ', 5 "are now in contact with a common support roll 2' and are held by roll holders (not shown) .The material web 7 is guided via the support roll 2 'to a first group of partial web rolls 5" which are arranged at an axial distance from one another are. The part webs remaining between these partial web rolls 5 "become the remaining ones Part web rolls 5 'supplied, which are arranged on the gap to the other partial web rolls 5 ".

Again, below a horizontal plane 26 through the rotation axis 27, the press roll 14 is provided which forms the nip 15 with the support roller 2 '. The material web 7, as long as it has not yet been cut in the transverse direction, fed via an inclined plane 28 to a chopper 29. In the simplest case, gravity is sufficient for transport. By a double arrow 30 is indicated that the press roll 14 can be lifted from the support roller 2 '.

The procedure here is basically similar to the device according to FIG. 1. The material web 7 is conveyed through the nip 15 into the shredder 29 until the longitudinal cutting lines arrive at the separating device 17. Only when the partial web beginnings, i. the beginning of the cutting lines, arrived at the separator 17, this is triggered and severed the web over its entire width. The Teilbahnanfänge be blown with the help of the blowing device 21 to the circumference of the support roller 2 ', sucked there and promoted together with the support roller 2' in the respective Wikkelpositionen.

Only in the individual winding positions can an operator be required to monitor the attachment of the partial web starts to the roll cores 24. However, the partial web beginnings arrive virtually automatically in these winding positions. This is achieved in a simple manner by initially providing that the material web passes through a first path through the winding device, which ends in the pulper opening 16 or in the chopper 29. The material web So it is, as long as it is not yet available in a processable form, disposed of easily. Only then, when you can use them, it is severed and, so to speak on a second path that starts at the press roll 14, led to the winding positions.

From the illustrated embodiment may be departed from in many ways. So you can provide instead of the press roll 14, a rotating belt, which is pressed against the support or support roller 2, 2 '. Instead of the supporting or supporting roller 2, 2 ', it is also possible to use another transport device which guides the partial web starts into the winding positions. Such a transport device can then optionally be pivoted away at the beginning of the winding process.

Claims (12)

1. Method for threading a plurality of part webs which are cut from a material web (7) onto part-web reels (5), in which the start of the material web (7) is inserted into a winder (1), the material web is conveyed through the winder (1) on a first path which leads to a disposal device (16, 29), until the said material web (7) is present with its full width and is cut into the part webs, and the said material web (7) is severed transversely with respect to its running direction as soon as the part webs are present, characterized in that the part-web starts which are formed by the severing are guided through a diverter arrangement (21, 22, 23) into a second path which branches off from the first path to winding positions.
2. Method according to Claim 1, characterized in that, after severing, the part-web starts are sucked onto a transport device.
3. Method according to Claim 2, characterized in that a nip, in which the material web is held fixedly during threading is formed between the transport device and a circulating pressure device.
4. Method according to Claim 3, characterized in that the nip is opened before the part webs are wound onto the part-web reels at a higher speed.
5. Method according to Claim 4, characterized in that the nip is opened after the part webs have been fastened to the reel core.
6. Method according to one of Claims 2 to 5, characterized in that the part webs are blown onto the transport device after the severing of the material web.
7. Winder for winding part webs which are cut from a material web (7) to form part-web reels (5), having a contact roll (2), against which the part-web reels (5) bear during winding, a slitter (11) and a threading section with means for feeding a material-web start to the contact roll (2), the threading section forming a part of a first path through the winder (1, 1'), which first path leads to a disposal device (16, 29), and a cross-cutting device (17) being arranged in the first path, characterized in that a diverter arrangement (21, 22, 23) is arranged adjacent to the cross-cutting device (17), at which diverter arrangement (21, 22, 23) a second path through the winder begins (1, 1') which leads to at least one winding position.
8. Apparatus according to Claim 7, characterized in that the diverter arrangement has a circulating pressure device (14), which forms a nip (15) with the contact roll (2, 2'), and a suction device (22, 23) which acts on the material web (7) through the contact roll (2, 2').
9. Apparatus according to Claim 8, characterized in that the pressure device (14) has a displacing drive (19).
10. Apparatus according to one of Claims 7 to 9, characterized in that the cross-cutting device (17) is provided with a blowing device (21).
11. Apparatus according to one of Claims 7 to 10, characterized in that the diverter is arranged below a horizontal plane (26) through the rotational axis (27) of the contact roll (2, 2').
12. Apparatus according to one of Claims 7 to 11, characterized in that the first path leads into a pulper opening (16) or a cutter inlet (29).

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