EP1657194B1 - Reel winding device and method for winding reels - Google Patents

Abstract

A paper mill discharges a web (10) of paper to a roll winding station (1) with longitudinal knife cutters (14) forming two strips and feeding a number of winding sub-stations (22-25). The assembly has a first winding sub-station (2) with a central drum (4) feeding two axially transposed winding units. The assembly has a second winding sub-station (3) using the same central drum (4) and feeding further axially transposed winding units (24, 25) which feed alternately to the first (2) and second (3) winding stations. The first (2) and second (3) main winding stations are located either side of the main central drum (4). The winding rollers at each station are located at different heights. The assembly further includes web splicing stations and a pulp trap for trimmings, and is co-located with e.g. a paper mill or printing press.

Description

The invention relates to a reel winding apparatus having a longitudinal cutting device and a winding station for winding part webs cut from a material web into winding reels, which has a first winding device with a central roll and winding positions arranged on both sides of the central roll, which are offset in the axial direction of the central roll. Furthermore, the invention relates to a method for producing winding rolls, in which one divides a material web by longitudinal cutting into partial webs and feeds the partial webs of a first winding device having a central roll and both sides of the central roll arranged winding positions, offset in the axial direction of the central roll to each other at 15, are ordered.

The invention will be described below with reference to a paper web as an example of a material web. But it is equally applicable to corresponding webs, for example, in webs of films or cardboard.

Paper webs are currently produced in widths of up to 11 m. In order to be manageable for a later user, such as a printing company, the paper web must be divided into narrower strips, the so-called partial webs, and wound up into winding rolls. The winding rolls have an axial length in the range of 0.2 to 5 m and a diameter in the range of 0.5 to 2.5 m.

A winding roll can only take a limited length of a partial web. Once the winding roll has reached its predetermined diameter, the part web must be separated and a roll core of a new winding roll be supplied. This has the consequence that between the individual winding operations relatively large dead times are necessary in which practically not wound, but only prepared. Due to these time losses, such a reel-winding device must wind at a speed which is greater than the speed of a paper machine previously arranged in a production process. In many cases, therefore, you need even more reel winders to keep up with a paper machine can.

From the US Pat. No. 6,007,014 a roll winding device with a longitudinal cutting device and a winding station for winding part webs cut from a material web into winding rolls is known. The roll winding device has a winding device with a central roll and arranged on both sides of the central roll winding positions, which are arranged offset in the axial direction of the central roll to each other.

The invention has for its object to be able to keep dead times small or even eliminate.

This object is achieved with a reel winding device of the type mentioned above in that a second winding device, which uses the central roller, arranged on both sides of the central roller winding positions, which are offset in the axial direction of the central roller to each other, and the partial webs alternately in the first winding device and are guided in the second winding device.

The two winding devices are thus designed as so-called contact winders, ie the individual winding rollers are applied to the central roller during winding. This makes it possible, during winding wrap a certain winding tension in the winding roll, so that you can reach a predetermined winding hardness. In any case, with a back-up roll winder, the bobbins partly rest against the central roll with their own weight. In a contact roller winder, the necessary pressure is generated from outside. If in the following of a contact roller winder is mentioned, then this term should also include a backup roller winder. So far, the partial webs have always alternately fed the winding positions, on both sides of the central roller are arranged. These winding positions were arranged relative to each other on a gap, so that a winding device could accommodate the complete partial webs of a material web. Now this structure is changed by providing a second contact roller winder and the partial webs now alternately no longer a winding device, but two winding devices zuleitet. Both winding devices use the central roller together, so that a total of at least four winding position groups are provided on the central roller. This has the advantage that in each winding device winding positions remain free and these winding positions are also freely available for preparation, because in addition to the individual winding positions, the corresponding adjacent partial web is missing. It is therefore possible to transfer the partial webs, which are wound in a winding position, after completion of the winding roll in another winding position. Since this winding position is in the same winding device, the transfer is much easier. The free winding position could be prepared accordingly, so that the passing of the partial web from the "full" to the "free" winding position can be done much faster. As a result, dead times are kept small.

It is advantageous if the first winding device and the second winding device are arranged on opposite sides of the central roller. This makes the best use of the space available at the central roller.

It is also advantageous if the first winding device in the direction of gravity at the top and the second winding device in the direction of gravity are arranged at the bottom of the central roller. Thus prevail in each winding device for all belonging to a winding device winding positions the same conditions, which facilitates the control of the respective winding course.

Each winding position preferably has a pre-acceleration device for a winding tube. This pre-acceleration device can be formed by a corrugated tube drive. But it is also possible that the Vorbeschleunigungs device simply presses the winding tube against the central roll and can accelerate it by frictional force. If the winding tube has been accelerated to the peripheral speed of the central roller, then the partial web can be transferred practically without stopping by the full winding roll on the empty winding roll.

Preferably, each winding device has at least one splicing device. With the splice device, the material web is severed after reaching the desired diameter of a full winding roll and a new roll core, which is arranged in the free winding position supplied. In a corresponding embodiment of the splicing device can thus achieve a so-called "flying splice" or flying change, i. the winding does not have to be interrupted, so that virtually no dead times occur due to a roll change. Even if you have to lower the winding speed when changing from a full to an empty winding roll, there are still time advantages.

Preferably, the splice device is movable in the axial direction of the central roller. It is therefore no longer necessary that the splice device covers the entire axial length of the central roll. Rather, it is now possible to ensure that the splicing device works off one winding roll after the other, so to speak. The splice device must be so have only a limited working length. The narrower the partial webs are, the easier it is to make a transition from the full to the empty winding reel.

Preferably, differently sized bobbins are arranged in at least two winding positions. It can be with this configuration ensure that not all bobbins are finished at the same time, but the transition of the partial webs of a full winding roll on an empty winding roll can be staggered in time one behind the other. This simplifies the control of the reel winder.

It is also advantageous if a pulper opening is arranged behind the longitudinal cutting device. For example, when feeding the partial webs, it is then possible first to let some partial webs run into the pulper until other winding rolls have reached a predetermined diameter. With this configuration it is ensured that the winding rollers have different diameters during later winding.

Preferably, the reel winder is arranged on-line with a paper machine, a coater or a calender. Since the change from a full winding roll to an empty winding roll can be done practically without loss of time, because sufficient reserve positions are available, such on-line operation can be realized.

It is also advantageous if the longitudinal cutting device has at least one knife arrangement which, in the cutting state, can be moved parallel to the axis of the central roll. With such a knife assembly you can then change the cutting plan during operation. This has the advantage that the position of the knife assembly can be checked by means of a finished cut strip. In other words, can Check whether the cut strip, ie the partial web, has the desired width. On the other hand then a change of the cutting plan during winding is possible. Although winding rolls produced when changing the cutting plan can not be further processed in the rule. The partial web wound up here must be disposed of. But since changing the cutting plan requires only a relatively short time, this disadvantage can be accepted. So far, one had to always diverge the blades of a knife assembly and remove the web to properly position the knife assemblies. This is no longer necessary.

It is preferred that the winding positions of the winding means relative to each other are adjustable so that the sum of the length of the winding tubes is greater than the width of the material web. This is possible by having two winding devices available. Such a design facilitates the change of the cutting plan, because you can make virtually any changes in width.

Preferably, transition cores are provided with a relation to normal cores enlarged diameter. On the transition cores only comparatively few turns are wound, namely as many turns, as required, to accommodate a portion of the sub-web can, whose width changes. Now, if these transition rollers have to be removed from the winding device, then they usually roll off on their circumference. The larger this circumference is, ie the larger the diameter of the transition rollers, the better the rolling behavior. With a larger winding core, ie a larger winding tube, the increase in diameter can be realized in a simple manner.

The object is achieved in a method of the type mentioned above in that one feeds the partial webs alternately two winding devices, each of which has a central roller and on both sides thereof arranged winding positions, wherein a common central roller is used for both winding devices.

With this configuration, it is ensured that an opposite free winding position is provided in each winding device for a winding position, with the addition that in the vicinity of this free Wi-ckelposition enough space is available to meet a preparation for a new winding roll. Clamping heads which pick up adjacent cores do not disturb the preparation. Nevertheless, one comes with a single central roller.

Preferably, after the completion of a winding roll in a winding position, the partial web is guided into the free winding position of the same winding device lying opposite the winding position. This makes it possible to shorten the dead time considerably. In most cases, it is not necessary to shut down the winder when passing. On the contrary, it is possible to continue the winding device at reduced speed or in some cases even at full speed. It is preferable to pre-accelerate a winding tube located in the free winding position. If the winding tube has the same peripheral speed as the central roller and thus as the incoming part of the web, then you can fix the part of the web, which has been separated from a full winding roll readily on the new winding tube and continue the winding process. Interruptions are then practically no longer necessary.

It is also advantageous if you wrap winder rollers in different stages of completion at the same time. In this case, for example, you can ensure that you always have to transfer only one or a few partial webs simultaneously from a full winding roll to an empty winding tube. This simplifies the control and keeps the device overhead low. In particular, you can with a corresponding staggering of the diameter of the bobbins ensure that a splice device must always be provided only for one change at the same time.

Preferably, when feeding the partial webs, individual partial webs are run in a pulper until already wound winding reels have reached a predetermined diameter. In other words, so you cut, as before, from a web of material a predetermined number of partial webs and leads, for example, only two partial webs in the two winding devices, in each winding device one. Once these partial webs have formed a winding roll with a predetermined diameter, the next two partial webs are passed into the two winding devices. In this case, the first two partial webs continue to wind, so that when winding the second two partial webs, the corresponding winding rollers also increase their diameter. It can thereby be achieved that the first winding rolls are finished when the last partial webs have begun to wind.

This can be exploited to transfer individual partial webs in succession from a winding position to a free winding position. As mentioned above, this simplifies the control and device structure.

Preferably, the width of at least one partial web is changed during winding. One is thus able to make a change in the cutting plan when winding. As a result, the desired train remains on the partial webs.

Preferably, a partial web section whose width changes is wound up and disposed of. Such a sub-web section will be unfavorable for further processing in the rule. But since it is only a matter of small lengths, this part of the web section can be returned to paper production.

Preferably, a larger roll core is used for winding up the partial web section. This automatically increases the circumferential surface of a roll which receives the partial web section with a changing width, so that the rolling behavior improves in such waste rolls.

In an alternative embodiment, it is provided that after the completion of a winding roll, the partial web can be run in the pulper, thereby changing their width by adjusting a longitudinal cutting device and feeds the partial web back to the winding position when the desired width is reached. In this embodiment, although an additional listing of the partial web with a changed width in the winding station is required. But you save yourself but the step of the intermediate winding on a winding tube, from which the sub-web would have to be disposed of with changing width again. Since changing the width of the sub-web can be done relatively quickly, the sub-web must be passed in changing the width only for a relatively short time in the pulper. The resulting losses are comparatively low.

Fig. 1

eine schematische Seitenansicht einer Rollenwickelvorrichtung in zwei unterschiedlichen Betriebszuständen und

Fig. 2

eine schematische Draufsicht auf eine Abwicklung der Rollenwickelvorrichtung entlang des Umfangs der Zentralwalze.

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

Fig. 1

a schematic side view of a roll winding device in two different operating conditions and

Fig. 2

a schematic plan view of a settlement of the reel winding apparatus along the circumference of the central roll.

A roll winding device 1 has a first winding device 2 and a second winding device 3. Both winding devices 2, 3 have a common central roller 4. On both sides of the central roller 4, approximately in the middle of the two upper quadrants of the central roller 4, a plurality of winding positions 5, 6 of the first winding device 2 are arranged, of which two are visible in Fig. 1. The other winding positions are parallel to the axis of the central roller 4 behind it.

The second winding device 3 has the same central roller 4, on both sides winding positions 8, 9 are arranged. The winding positions 8, 9 are located in the two lower quadrants of the central roller 4th

A paper web 10, which comes from a source 11, passes over a deflection roller 12 to a longitudinal cutting device 14. The source 11 may be a paper machine, a coater or a calender. The roll winding device 1 is thus arranged on-line to this source 11.

The longitudinal cutting device 14 has upper blade 15 and lower blade 16, wherein in each case an upper blade 15 cooperates with a lower blade 16 The longitudinal cutter 14 divides the paper web 10 into a plurality of partial webs 17a, 17b, 18a, 18b which are fed in groups to the first winding device 2 or the second winding device 3.

In the web running direction behind the longitudinal cutting device 14, a pulper 19 is arranged with an opening 20 into which the paper web 10 or partial webs 17a, 17b, 18a, 18b can run.

The winding devices 2, 3 are each constructed in the manner of a contact roller winder, i. Winding rolls 22-25, which form from the partial webs 17a, 17b, 18a, 18b, abut against the central roll 4 and migrate with increasing diameter along guideways 26 obliquely upwards (winding device 2) or downwards (winding device 3), for example, at an angle of 45 ° to the vertical. In this case, the winding rollers 22-25 winding sleeves 30, 31, which are shown schematically in Fig. 2. The cores 30, 31 are mounted in guide heads 32, 33. The guide heads 32, 33 may also have a rotary drive.

In Fig. 2, the common central roller 4 is shown twice, namely once from above with the winding device 2 and once from below with the winding device. 3

As can be seen in FIG. 2, the partial webs 17, 18 are now fed alternately to the two winding devices 2, 3. The partial webs 17 wrap around the central roller 4 so that they are fed either to a winding roll 23 or a winding roll 22. Between these two winding rollers 22, 23 is located in the axial direction of the central roller 4 is a clear distance 34. Opposite the winding roller 22 is a free winding position with the winding tube 31. Opposite the winding roller 23 is a free winding position with the winding tube 30. Due to the gaps (ent-speaking gaps also arise between the other in the Wrapping device 2 wound bobbins) is enough space available to prepare the cores 30, 31, which are in the free winding positions. In particular, the cores 30, 31 can be provided with an adhesive strip or otherwise tackified, so that after the completion of a winding roll 22, 23, the sub-webs 17a, 17b can be transferred to each located in the free winding positions winding sleeves 31, 30 as shown by arrows 35a, 35b.

In a corresponding manner 3 winding rollers 24, 25 are arranged in the second winding device. Opposite each winding roll 24, 25 there is a free winding position in the empty winding tubes 36, 37 can be prepared to receive partial webs 18a, 18b can, as indicated by arrows 38a, 38b.

In order to make such a "splice", each Wickelei device 2, 3 is a cross-cutting device 39, 40 associated with the incoming partial webs 17, 18 can cut individually or together. With the help of guiding devices 41-44, the corresponding partial webs 17a, 17b, 18a, 18b are then fed to the respective free winding position.

As can be seen from Fig. 2, the individual winding rollers 22, 23 and 24, 25 quite different diameters. This is desired. These different diameters can be produced, for example, by inserting the paper web 10 into the roll winder 1 not all partial webs 17, 18 leads to the winding devices 2, 3, but some sub-webs run in the pulper 19, as indicated in Fig. 1 with a dashed line (end 21). Only then, when a winding roll 22, 24 has reached a predetermined diameter, the next partial webs are passed into the winding devices 2, 3. Continued winding further increases the diameter of the wound rolls wound first, while the diameter of the wound rolls wound thereafter remains smaller. This is continued until all winding positions are occupied by bobbins. Now, if a winding roll has reached the desired diameter, then you can transfer the partial web 17b or 18a on the correspondingly free winding tube 31, 36, while the other bobbins 23, 25 continue to wind. On the hubs cores 31, 36 then again creates a winding roll whose diameter is smaller than the diameter of the other winding rolls and that until such rolls are full and the corresponding partial webs must be transferred to new cores. As a result, you can keep the effort when passing the partial webs of full roles on new cores small and in terms of control technology and in terms of design. The guiding devices 41-44 and the transverse cutting devices 39, 40 only have to be designed for a limited width.

The knives 15, 16 of the slitter 14 can be moved while cutting. This makes it possible to change the cutting plan, ie the widths of the individual partial webs 17, 18. For this purpose, it is only necessary that one provides in the free winding positions winding tubes 30, 31 and 36, 37, which is wide enough for the widest region of a partial web section whose width changes. So it may well be that the sum of the lengths of all cores of the two winding devices 2, 3 is longer than the width of the supplied paper web 10th

The sub-web sections, whose widths change, can not be used for further processing in most cases. It is therefore expediently wound on a transition winding tube whose diameter is greater than the diameter of a winding sleeve normally used. This gives you a waste roll with an enlarged diameter that can be rolled out better.

In an alternative embodiment, it is possible to direct the partial web sections whose widths change directly into the pulper 20, as is schematically illustrated by the end 21. For this purpose, it is expedient to wait until adjacent winding rolls 22, 24 have reached their desired final diameter and, in any case, a knocking off of the corresponding part webs 17b, 18a is required. After knocking off, the corresponding partial webs 17b, 18a are not transferred directly to a new winding sleeve 31, 36, but the corresponding partial webs 17b, 18a are passed into the pulper 20. At this moment, the knives 15, 16 of the longitudinal cutting device 14 can already be used laterally, so transversely to the direction of the partial webs 17, 18, are adjusted. As soon as the partial webs 17b, 18a have reached the desired width, they are transferred to the new roll cores 31, 36. You can then start the winding of new bobbins with a different width. Depending on the speed of the partial webs 17, 18, although a certain length of the partial webs is lost. However, the loss is relatively small because the adjustment of the longitudinal cutting device 14 can be done relatively quickly. When adjusting, you do not even have to make sure that the cutting edges are smooth. The only condition is that the sub-webs do not tear when changing the width.

The invention enables a winding of the partial webs with relatively great flexibility and relatively little design effort. All partial webs 17, 18 revolve around the central roller 4 in the same direction to its winding position. Dividing the central roller 4 into four quadrants I, II, III, IV, so for example at a certain time in the quadrant I, the one half of the partial webs are wound up. In Quadrant II then wait a correspondingly large number of empty tubes on the same tracks that are taken when the roll wraps on quadrant I have reached their desired size. Similarly, the same arrangement applies to the other half of the partial webs, which are wound in the quadrant III and later transferred to the quadrant IV. This procedure requires only a central roller 4 and ensures a quick change. After the bobbins are full, the central roller 4, at which the track ends are somehow held, just by a quarter turn to be moved and already the trailing ends have reached their new winding position. The full bobbins can be removed and replaced with new sleeves, for which again enough space and handling space is available.

Claims (22)

1. Reel winding device having a slitter and a winding station for winding part webs cut from a material webs into reels, which device has a first winding device (2) having a central roll (4) and winding positions (22, 23) which are arranged on both sides of the central roll (4) and are arranged offset from one another in the axial direction of the central roll (4), characterized in that a second winding device (3), which uses the central roll (4), has winding positions (24, 25) which are arranged on both sides of the central roll (4) and are arranged offset from one another in the axial direction of the central roll (4), and the part webs (17, 18) are led alternately into the first winding device (2) and into the second winding device (3).
2. Device according to Claim 1, characterized in that the first winding device (2) and the second winding device (3) are arranged on mutually opposite sides of the central roll (4).
3. Device according to Claim 2, characterized in that the first winding device (2) is arranged at the top on the central roll in the direction of the force of gravity, and the second winding device (3) is arranged at the bottom on the central roll in the direction of the force of gravity.
4. Device according to one of Claims 1 to 3, characterized in that each winding position has a pre-acceleration device for a core (30, 31; 36, 37).
5. Device according to one of Claims 1 to 4, characterized in that each winding device (2, 3) has at least one splicing device (39, 40).
6. Device according to Claim 5, characterized in that the splicing device (39, 40) can be moved in the axial direction of the central roll (4, 7).
7. Device according to one of Claims 1 to 6, characterized in that reels of different size are arranged in at least two winding positions (22-25).
8. Device according to one of Claims 1 to 7, characterized in that a pulper opening (20) is arranged after the slitter (14).
9. Device according to one of Claims 1 to 8, characterized in that it is arranged online with a paper machine (11), a coating machine or a calender.
10. Device according to one of Claims 1 to 9, characterized in that the slitter (14) has at least one knife arrangement (15, 16) which, when it is cutting, can be moved parallel to the axis of the central roll (4, 7).
11. Device according to Claim 10, characterized in that the winding positions of the winding devices (2, 3) can be set relative to one another in such a way that the sum of the lengths of the cores is greater than the width of the material web.
12. Device according to Claim 11, characterized in that transition cores having a diameter enlarged as compared with normal cores are provided.
13. Method for producing winding reels, in which a material web is subdivided into part webs by slitting and the part webs are supplied to a first winding device, which has a central roll and winding positions which are arranged on both sides of the central roll and are arranged offset from one another in the axial direction of the central roll, characterized in that the part webs are supplied alternately to the first and a second winding device, each of which has a central roll and winding positions arranged on both sides thereof, a common central roll being used for both winding devices.
14. Method according to Claim 13, characterized in that, after a reel has been completed in a winding position, the part web is led into the free winding position of the same winding device that is opposite the winding position.
15. Method according to Claim 14, characterized in that a core located in the free winding position is pre-accelerated.
16. Method according to one of Claims 13 to 15, characterized in that reels are wound simultaneously at different stages in the completion.
17. Method according to Claim 16, characterized in that, during the threading of the part webs, individual part webs are allowed to run into a pulper until reels that are already being wound have reached a predetermined diameter.
18. Method according to Claim 16 or 17, characterized in that individual part webs are led over one after another from a winding position to a free winding position.
19. Method according to one of Claims 13 to 18, characterized in that the width of at least one part web is changed during winding.
20. Method according to Claim 19, characterized in that a part web section whose width changes is wound up and disposed of.
21. Method according to Claim 20, characterized in that a larger reel core is used to wind up the part web section.
22. Method according to one of Claims 13 to 18, characterized in that, after a reel has been completed, the part web is allowed to run into the pulper, in the process its width is changed by displacing a slitter, and the part web is supplied to the winding position once more when the desired width has been reached.

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