EP1657193A1 - Reel winding device and method for winding reels - Google Patents

Abstract

A papermaking assembly discharges a web to a paper roll main winder station (1) with feeding a knife station (14) that cuts the web longitudinally into a number of strips. The first main winder station has two sub-winding stations that are axially transposed with respect to each other. A second main winder (3) has a central drum (7) with two sub-winding stations (24, 25) that are axially transposed with respect to each other. Each winding station has a spin-up device for each replacement winding core. Each winding station (2, 3) has a splicing assembly (39, 40) that can shift axially on demand with respect to the central drums (4, 7). Two or more of the sub-winding stations accommodate rolls of different size. The knife station (14) is co-located with a pulp skip (20).

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 winding station, which has a central roll and arranged on both sides of the central roll winding positions.

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 reaches its predetermined diameter has, the partial web must be separated and fed to a roll core of a new winding roll. 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.

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

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

The two winding devices are thus designed as a so-called support or contact winder, ie the individual bobbins are applied to the central roll during winding. This makes it possible, during winding to 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 back-up roll winder is mentioned, then this term should also include a contact roller winder. You have so far the partial webs always alternately supplied to the winding positions, which are arranged on both sides of the central roller. These winding positions were arranged relative to each other on gap, so that a winding device could receive the complete partial webs of a material web. Now, this structure is changed by providing a second back-up roll winder and the part sheets are now alternately no longer a winding device, but two winding devices zuleitet. 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.

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 therefore 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. You can now, for example, while performing the partial webs first run some sub-webs in the pulper until other reels 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, it is possible to check whether the finished 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 greater than the width of the web is. 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 extent is, i. the larger the diameter of the transition rollers, the better the rolling behavior. With a larger hub, i. a larger winding tube, the diameter increase is easy to implement.

The object is achieved in a method of the type mentioned above by alternately feeding the partial webs two winding devices, each of which has a central roll and arranged on both sides winding positions.

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

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 circumferential speed as the central roller and thus as the incoming partial 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 material web 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 coil, the part of the web section changing with Width absorbs, so that the rolling performance improved in such waste rolls.

In an alternative embodiment, it is provided that you run after the completion of a winding roll, the partial web 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 und

Fig. 2

eine schematische Draufsicht auf die Rollenwickelvorrichtung.

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 and

Fig. 2

a schematic plan view of the roll winding device.

A roll winding device 1 has a first winding device 2 and a second winding device 3. The first winding device 2 has a 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 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 also has a central roller 7, on both sides winding positions 8, 9 are arranged. The winding positions 8, 9 are also located in the two upper quadrants of the central roller. 7

A paper web 10, which comes from a source 11, passes over a plurality of deflection rollers 12, 13 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 and the outer blade 15 are arranged perpendicular to the plane one behind the other, just like the lower blade 16. The longitudinal cutting device 14 divides the paper web 10 into a plurality of partial webs 17, 18, the groups of the first winding device 2 or the second winding device 3 are supplied.

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 17, 18 can run, as is indicated by an end 21.

The winding devices 2, 3 are each constructed in the manner of a back-up roll winder, ie winding rolls 22-25, which are formed from the partial webs 17, 18, abut against the central rolls 4, 7 and move with increasing diameter along guideways 26-29 obliquely above, for example, at an angle of 45 ° to the vertical. Here are the bobbins
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.

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 the two winding rollers 22, 23 is located in the axial direction of the central roller 4 a significant 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 wound in the winding device 2 winding rollers) is enough space available to the winding tubes 30, 31, which are in the free winding positions to prepare. In particular, the winding tubes 30, 31 can be provided with an adhesive strip or otherwise tackified, so that after the completion of a winding roll 22, 23, the partial webs 17 a, 17 b 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 be able to make such a "splice", each central roller is associated with a cross-cutting device 39, 40, which can cut through the incoming partial webs 17, 18 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 not leading all of the partial webs 17, 18 to the winding devices 2, 3 when the paper web 10 is fed into the roll winding device 1, but instead allowing some partial webs to run into the pulper 19, as shown in FIG 1 with a dashed line (end 21) is indicated. 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. It may well be that the sum of the lengths of all the winding tubes 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 winding new rolls with changed 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.

Claims (20)

Roll winding device with a Längsschneideei device and a winding station for winding cut from a web webs part to bobbins having a first winding device with a central roll and arranged on both sides of the central roll winding positions, which are offset in the axial direction of the central roll to each other, characterized in that a second Winding device (3) having a central roller (7) and arranged on both sides of the central roller winding positions (24, 25) offset in the axial direction of the central roller (7) are arranged, is provided, and the partial webs (17, 18) alternately into the first Winding device (2) and in the second winding device (3) are guided. Apparatus according to claim 1, characterized in that each winding position has a pre-acceleration device for a winding tube (30, 31, 36, 37). Apparatus according to claim 1 or 2, characterized in that each winding device (2, 3) has at least one splicing device (39, 40). Apparatus according to claim 3, characterized in that the splicing device (39, 40) in the axial direction of the central roller (4, 7) is movable. Device according to one of claims 1 to 4, characterized in that differently sized bobbins are arranged in at least two winding positions (22-25). Device according to one of claims 1 to 5, characterized in that behind the longitudinal cutting device (14) a pulper opening (20) is arranged. Device according to one of claims 1 to 6, characterized in that it is arranged on-line with a paper machine (11), a coating machine or a calender. Device according to one of claims 1 to 7, characterized in that the longitudinal cutting device (14) has at least one knife arrangement (15, 16) which, in the cutting state, can be moved parallel to the axis of the central roll (4, 7). Apparatus according to claim 8, characterized in that the winding positions of the winding means (2, 3) 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. Apparatus according to claim 9, characterized in that transition winding tubes are provided with a relation to normal cores enlarged diameter. A process for producing winding rolls, in which dividing a material web by longitudinal cutting in partial webs and feeds the partial webs of a winding station having a central roll and arranged on both sides of the central roll winding positions, characterized in that the partial webs alternately two Winding supplies, each of which has a central roller and arranged on both sides winding positions. A method according to claim 11, characterized in that , after the completion of a winding roll in a winding position, the part web passes into the winding position opposite the free winding position of the same winding device. A method according to claim 12, characterized in that one pre-accelerates a winding tube located in the free winding position. Method according to one of claims 11 to 13, characterized in that winding winder rolls at different stages of completion at the same time. A method according to claim 14, characterized in that , when the partial webs are introduced, individual partial webs are run in a pulper until already wound winding reels have reached a predetermined diameter. A method according to claim 14 or 15, characterized in that one passes individual partial webs successively from a winding position to a free winding position. Method according to one of claims 11 to 16, characterized in that one changes the width of at least one partial web during winding. Method according to claim 17, characterized in that a partial web section whose width changes is wound up and disposed of. A method according to claim 18, characterized in that one uses a larger roll core for winding up the partial web section. Method according to one of claims 11 to 16, characterized in that , after the completion of a winding roll, the part web can be run into the pulper, thereby changing its width by adjusting a longitudinal cutting device and feeding the part web back to the winding position when the desired width is reached.

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