DE102010041700A1 - Winding process and slitter winder - Google Patents

Abstract

The invention relates to a winding method in which a material web (M), in particular a paper or cardboard web, is unwound from a master roll (3) and divided along its running direction (x) in a longitudinal cutting process to form finished rolls (7) and then again is wound up, with at least two finished rolls (7) formed during a winding process end-to-end next to one another in a common winding bed (6) under the influence of winding rollers (18, 19, 25), the finished rolls (7) being formed and those treating them Winding rollers (18, 19, 25) form parts of a common winding system (8). One would like to stabilize the winding process and, in particular, avoid high vibration amplitudes in the winding system. For this purpose, it is provided that the longitudinal cutting process is interrupted and resumed at least once during the winding process. The invention also relates to a winder (1) which has an unwinding device (2) for a master roll (3) in which a material web (M), preferably a paper or cardboard web, can be unwound from a master roll (3), and also a longitudinal separating section (4), in which the material web (M) can be separated in the longitudinal direction (X) and has a winding device (5) which comprises a winding bed (6) in which at least two finished rolls (7) which can be positioned next to one another at the end under the influence of winding rollers ( 18, 19, 25) can be formed and the finished rolls (7) that are formed and the winding rollers (18, 19, 25) treating them form parts of a common winding system (8), the longitudinal separating section (4) of which in order to achieve the stated objectives is designed that the longitudinal cutting process can be interrupted and resumed during the winding process.

Description

The invention relates to a winding method in which a material web, in particular a paper or board web, unwound from a parent roll and divided to form finished rolls in a longitudinal separation process along its direction and wound up again, at least two forming during a winding process finished rolls are produced side by side in a common winding bed under the influence of winding rollers, wherein the forming finished rolls and the winding rollers treating them form parts of a common winding system.

Furthermore, the invention relates to a slitter-winder, which has an unwinding device for a master roll, in which a material web, preferably a paper or board web, can be unwound from a mother roll,
Furthermore, a longitudinal dividing section comprises, in which the material web is separable in the longitudinal direction
and a take-up device comprising a winding bed in which at least two finished side by side positionable finished rolls under the influence of winding rollers are formed, and form the forming finished rolls and the winding rollers treating them parts of a common winding system.

The invention will be explained below in connection with the treatment of a paper web. However, it is also applicable to other webs that are similar to handle. These are, for example, but not exhaustive, to webs of cardboard, plastic or metal foils.

Paper webs are produced in relatively large widths of up to more than 11 m in a paper machine. The production is almost endless. In this case, the machine direction of the paper machine defines the longitudinal direction for all machines and devices located in the paper factory and the transverse direction perpendicular thereto in the horizontal plane. To simplify the present document, the longitudinal direction X-direction, the transverse direction as Y-direction and the height direction perpendicular to a plane defined by these two directions are referred to as Z-direction. At the end of the paper machine, the paper web produced is wound in full width onto a winding core. This winding core is replaced cyclically, usually during production. The resulting web-wide winding is commonly referred to as mother roll. In order to be manageable for a later user, for example a printing company, the paper web wound on a mother roll has to be cut into a plurality of parallel partial webs whose widths are suitable for the respective later user. These widths can vary greatly from case to case, so that the division of the paper web is usually made according to an individually definable pattern. The partial webs are then wound into so-called partial web or finished rolls and issued together as a so-called roll throw. The pattern can be changed from roll throw to roll throw. The slitting and winding is conveniently done in a single machine, which is widely referred to as a slitter-winder. In essence, such a slitter rewinder consists of a unwinding device, a cutting section and a roll-up device, wherein the cutting section has a number of mostly disc-shaped cutters adapted to the possible divisions.

In the embodiment of a slitter-winder, the person skilled in the art distinguishes between two basic types of construction, namely the support roller and the back-up roller. This is true even if at least one of the winding rollers forming in the winding process - d. H. Teilbahn- or finished rolling influence taking winding rollers is replaced by a, revolving around rollers, belt.

Characteristic of the roll carrier type, which is of sole interest for the present application, is a retractor, in which the entire roll throw in a winding bed, which consists of two support rollers, is wound on winding tubes. The winding tubes of the roller throw can be held by means of tensioning or guiding heads or, in rarer cases, through winding shafts inserted into the winding tubes. The rolls are wound up together, as a complete throw. As a rule, this is done by means of a circumferential winding, for which purpose at least one of the two support rollers can be driven. If a winding shaft is used, a center winding or a combination of both can also take place.

In general, additional pressure rollers are used, which provide in the initial stage of each winding for a desired level of winding hardness and should take over the course of the winding process often stabilizing tasks.

To ensure competitiveness and achieve high productivity, efforts are being made to achieve high production speeds. In this case, all facilities or machines located in the production chain of a paper factory have to be oriented to the production speed predetermined by the paper machine. As a paper machine, apart from malfunctions, continuously works, it is difficult for a discontinuous slitter to follow the speed presented, since set-up, acceleration and deceleration times occur relatively frequently according to the task of format reduction and are therefore only offset by significantly higher production speeds.

This means that the roll-cutting machine has to produce roller set for roller set in a kind of stop-and-go process under extreme acceleration and deceleration values. The greatly increased production speeds of paper machines in recent years, the desire existing for economic reasons to follow the production of the paper machine with a single slitter and the grown especially in the upper format ranges spectrum of different consumer needs has resulted in today finished rolls in width ranges between about 0.2 m to 5.0 m and finished weights between a few hundred kilograms and 10 tons are produced. Their final diameter is usually about 1.5 m, with strong deviations are common. In this case, production speeds of up to 3000 m / min are sought, which should be achieved between acceleration and deceleration phases of 40 m / s ² to 60 m / s ² .

However, such high demands on the winding process and, associated therewith, on the slitter-winder still pose a high risk potential due to vibrations occurring.

The winding to be produced hardly takes on an ideal round shape. Small winding errors, for example, due to slight profile fluctuations of the paper web to be wound, add up with each full wrapping. Due to the periodic recurrence of the respective winding defects of the rotating coil, vibrations of corresponding frequency are formed depending on its circumference and peripheral speed.

With increasing production speed, the excitation frequency is always greater (with increasing peripheral speed, the same position of the winding more and more often passes through the same winding gap) and the exciter amplitude is increasingly violent (at the same time as its winding diameter and its unevenness and the effective weight increases). In this case, the probability increases greatly that form during this complex process vibrations that are suitable (via integer harmonics) to form resonances with the winding rollers of the winding machine, which can lead to a fierce, sometimes rapid "rocking" of the entire machine. As is known, in extreme cases, reels can be ejected from the winding bed.

At today's desired production speeds, there is hardly any economically viable option to interpret the natural frequencies of the support rollers involved so that a possible Eigenstimmulierung the system can be reliably excluded and superimposed to take a variety of other vibration indicators on the machine under a group of vibration indicators together are.

Mainly influenced by the aforementioned group, ie the vibration indicators that are essentially related to the paper web to be processed, also frequently observed other phenomena occur, which are at least partly due to a freedom of movement of the individual roles with each other. Observations have shown that critical winding phases can form in particular when the partial web rolls have reached or pass through a winding diameter of about 800 mm to 1100 mm.

The invention is therefore based on the object, a method and an apparatus for winding a web on a winding tube such that the conditions in the winding area will stabilize. In particular, high vibration amplitudes are to be avoided within the winding system.

According to the method, the object of the invention is achieved in that the longitudinal separation process is interrupted at least once during the winding process and resumed.

Essential to the invention is therefore the interruption of an already within the same winding process exerted longitudinal separation process and its resumption.

Thus, substantial advantages of the inventive method can be exploited if the longitudinal separation process is interrupted for a period of time that does not directly contact the beginning or end of the winding process.

It is particularly advantageous if the interruption during the main winding phase, ie after the acceleration phase at the beginning and before the deceleration phase at the end of the winding process is carried out because the vibration critical winding phases often fall into this area or at least initiated in this area.

Likewise, it may also be advantageous if during the acceleration phase, in particular towards its end or during the deceleration phase, in particular during the initiation period of the deceleration phase, the method according to the invention is used, since partly violent roll swings can occur in these periods, which is then mostly initiated by web tension fluctuations and can quickly become dangerous. By interrupting and resuming the longitudinal separation process adjacent Teilbahnrollen be connected during their formation process and thus calmed in their operating characteristics, whereby their natural frequency is changed. The connection takes place in a diameter range, which is spaced both from the outer diameter of the winding tube (s), as well as the final diameter of a finished wound to finished roll.

It is advantageous if the interruption and resumption of the longitudinal separation process is based on collected measurement data.

In this way, stabilization can be intervened as needed in the winding process. Such a trained method can therefore be used individually. Possibly complex subsequent separation processes are only necessary if the winding process of a particular roller set currently in production is to be calmed. Thus, a method of this kind can certainly comprise a daily production at which only some of the roller sets to be manufactured, for example, in a clock cycle of approximately 5 to 15 minutes, are stabilized by a brief interruption of the longitudinal separation process between adjacent partial web rolls.

In contrast, it may occasionally be advantageous if the interruption and resumption of the longitudinal separation process is initiated by means of a defined program sequence.

Frequently, papers of different types are produced on one and the same paper machine, but their parameters, such as area weights, are repeated over a certain period of time. The same applies to the pattern to be produced on the slitter-winder. In paper mills, which produce a relatively manageable spectrum of such variations, it may therefore be useful to carry out a method according to the invention on the basis of stored program sequences. This saves, for example, a certain amount of necessary control or regulation technology.

The program sequence can be created, for example, on the basis of calculations or experience.

It is preferred that the longitudinal separation process is interrupted shortly before or when a critical natural frequency of the winding system or at least part of the winding system is reached.

In this way, the achievement of critical vibration conditions is effectively prevented and ensures a smooth winding process. Thus, the production of high quality bobbins at high production speeds is made possible.

Advantageously, the longitudinal separation process is interrupted for less than 1.5 seconds, preferably for less than 1 second and most preferably for only a few tens or 100ths of a second.

Such a short interruption is perfectly sufficient, depending on the present winding speed and partial web roll diameter already achieved, to produce a connection of sufficient stability between forming adjacent partial web rolls. At full production speed, ie at a speed of the material web to be wound of, for example, 45 meters per second and an already achieved partial web roll diameter of 1000 mm and a corresponding circumference of about 3140 follows an approximately 5 winding layers strong connection of only about 0.35 seconds lasting interruption.

In some cases, however, it may well be preferred that the connection, for example with regard to the subsequent separation process of the finished rolls, only about one winding layer should be strong. Likewise, of course, a slightly longer interruption within the above-mentioned time window for generating a particularly stable connection is conceivable.

The longitudinal separation process is particularly advantageously interrupted and resumed at a web speed greater than 800 meters per minute, preferably greater than 1200 meters per minute, more preferably greater than 1500 meters per minute.

Thus, the manufacturing process can be operated particularly effectively. It is preferred that when interrupting and resuming the longitudinal separation process, the currently applied web speed is reduced by not more than about 10% ... 15%. Most preferably, the web speed is maintained even in the usual tolerance ranges and can then in modern slitter under full Production speed 2500 meters per minute, 2800 meters per minute or even up to about 3000 meters per minute.

It is advantageous if the longitudinal separation process comprises a plurality of individual separation processes distributed in parallel over time and over the CD direction of the material web and only a part of the individual separation processes is interrupted in a time-overlapping manner.

In this way, the winding process can be stabilized particularly efficient, since only those forming sub-web roles are stabilized, of which a risk of vibration is to be expected or from which already a vibration focus concretely.

Overlapping in time means that the interruptions of the individual longitudinal separation processes do not have to be exactly synchronous, although a parallel interruption and resumption is preferred in most cases.

With particular advantage, those or those individual separation processes, which seen the material web in the CD direction, interrupted in its central region longitudinally interrupted and resumed, while the marginal Einzeltrennprozesse be maintained.

In most cases, a risk of vibration from the, seen in the Y direction, middle area of the winding bed be assumed, so that in a corresponding embodiment of the method according to the invention, the winding process can be calmed efficiently and unnecessary effort in conjunction with the otherwise for the marginal finished rolls to be performed after the completion of the winding process is avoided.

In connection with the two embodiments described above, it is also conceivable that individual separation processes are interrupted in chronological order one after the other. Then it is preferred that in one or both directions, as expected in the y direction, an expected or already active vibration focus is assumed.

It is further preferred that the finished rolls to be joined are selected according to format and position in the winding bed such that a single interruption and resumption of the longitudinal cutting process is sufficient to avoid reaching critical vibration states of a part of the winding system or the winding system over the entire winding process.

As already described, it is possible to interrupt individual individual separation processes individually or in groups in time order overlapping or successively. It is also possible to interrupt and resume one and the same single separation process within a single winding process simply or repeatedly.

Thus, the operator of a slitter-winder by the method according to the invention and in particular by the possibility of combining its embodiments a variety of suitable options calming acting on the winding process is available.

Does the operator the engagement according to the invention, that is, the interruption and resumption of the longitudinal separation process and the pattern, ie format and location of the finished rolls to be produced according to the latter embodiment, a winding process is particularly safe and efficient calmed.

Advantageously, the forming finished rolls are wound on a common winding tube or each own winding tubes.

Connected finished rolls must be separated following the wrapping process. Depending on the choice of the separation process, it is also conceivable that, so to speak, in a single operation, a continuous winding tube is separated.

However, the partial web or finished rolls are preferably wound on their own winding tubes, since the stabilizing effect of the method according to the invention is immense anyway and the separation of a relatively massive winding tube, which is also particularly difficult to access the roller center is particularly expensive.

Furthermore, it is of particular advantage if the interconnected finished rolls are separated during or after the ejection from the winding bed by means of a mechanical, thermal or fluid-based separation process.

In this way, the necessary separation process can be elegantly integrated into the overall production process.

Already the ejection process from the slitter-winder offers a good opportunity to separate the interconnected finished rolls, as very targeted and appropriately sized forces can be applied to the individual web rolls or in a suitable manner to the entire roll throw.

Another opportunity for this results in the generally following the ejection process singling process. Be here the roles for better handling, for example, for attaching labels, for easier quality control or for better removal isolated. For this purpose, conventionally provided with a stop provided oblique outlet track behind the slitter winder on which the finished rolls roll along their own outer diameters. A targeted control of the stop is then sufficient for many applications to solve two connected in the manner described above finished rolls of each other.

In order to achieve a clean cut seam, however, it is preferable in many cases if one separates the connected finished rolls with the application of targeted separation mechanisms, for example with the aid of a sharp separating knife or separating plate, a wire, by means of a laser beam, water jet or by means of compressed air or the like. In this case, the effort associated with the particular separation method to be selected is to be set in relation to the requirements to be placed on the separating seam. For example, it may be important to determine whether the finished roll once again undergoes edge trimming for a later user, for example a printing company, or whether it should possibly be used to the edge, for example printed.

According to the device, the object of the invention is achieved in that the longitudinal dividing part is designed such that the longitudinal separation process can be interrupted and taken up again during the winding process.

In this way, partial web rolls forming side by side in a common winding bed can be connected to one another on a diameter range which is spaced from the diameter of the winding core and the final diameter of the finished roll. Thus, the partial web rolls during the winding process in a geometrically very favorable area are interconnected and thus highly stabilized.

For this purpose, it is particularly preferred that the longitudinal dividing section is designed such that the separation or cutting offset is less than 1.0 mm, preferably less than 0.5 mm, most preferably less than 0.2 mm. This is very easy to implement in separation processes that are based on the transmission of thermal or kinetic energy, such as laser cutting or separation by means of pure or enriched water or compressed air jet, since only the corresponding output device, such as the laser head or the water or Compressed air nozzle, must be designed accordingly finely positionable.

If the longitudinal parting section, however, designed as a cutting section with conventional upper and lower blade or cutting and pot knife, it is particularly advantageous if the contact of the two knives by horizontal mobility of the pot knife is detachable or producible so that a vertical outlet and re-entry of the cutting blade in a common curse is enforceable.

In this case, it is preferred that the longitudinal dividing section is designed such that the longitudinal separation process can be interrupted and resumed within 1.5 seconds, preferably within 1.0 seconds, very particularly preferably within a few 10ths or 100ths of a second.

Such a short interruption is depending on the present winding speed and already achieved Teilbahnrollendurchmesser the prerequisite for generating a connection sufficient but not too high stability between forming adjacent Teilbahnrollen.

With particular advantage, the longitudinal parting section is designed such that the longitudinal separation process is interruptible and resumable at a web speed of more than 800 meters per minute, preferably more than 1200 meters per minute, very preferably more than 1500 meters per minute.

Thus, the manufacturing process can be operated particularly effectively. It is preferred that when interrupting and resuming the longitudinal separation process, the currently applied web speed is reduced by not more than about 10% ... 15%. Most preferably, the web speed of 2500 meters per minute, 2800 meters per minute or even to about 3000 meters maintainable.

• – Geschwindigkeit der Materialbahn und/oder wenigstens einer Teilbahn
• – Umfangsgeschwindigkeit der sich bildenden Fertigrollen
• – Umfangsgeschwindigkeit wenigstens einer Wickelwalze
• – Schwingungszustand wenigstens eines Teils des Wickelsystems und/oder des gesamten Wickelsystems
• – Durchmesser der sich bildenden Fertigrollen in Form von individuellen Einzelmessungen
• – axiale Bewegung mindestens einer sich bildenden Fertigrolle
• – Schaukelbewegung mindestens einer sich bildenden Fertigrolle
• – Druckkontakt im Nip zwischen mindestens einer Wickelwalze und mindestens einer sich bildenden Fertigrolle, vorzugsweise zwischen allen beteiligten Wickelwalzen und allen sich bildenden Fertigrollen
• – der in der noch ungeteilten Materialbahn und/oder in wenigstens einer Teilbahn vorliegende Bahnzug

Advantageously, at least one sensor is provided for at least indirect recording of at least one of the following parameters:

• - Speed of the material web and / or at least one partial web
• - Peripheral speed of the forming finished rolls
• - Peripheral speed of at least one winding roller
• - Vibration state of at least part of the winding system and / or the entire winding system
• - Diameter of the forming finished rolls in the form of individual individual measurements
• - axial movement of at least one forming finished roll
• - Rocking movement of at least one forming finished roll
• - Pressure contact in the nip between at least one winding roller and at least one forming finished roller, preferably between all participating winding rollers and all forming finished rolls
• - The present in the still undivided web and / or in at least one partial web train

In this way, parameters can be detected that contain important information on the presence of vibrations, vibration hazards or other potential disturbances. Thus, an active control and / or regulation is possible.

Furthermore, it is preferred that a web stabilization device is provided in the region of the longitudinal separating device.

This serves primarily the process safety, since under stable track conditions the risk of an unwanted crack formation at interruption and at the resumption of the longitudinal separation process can be minimized.

Such a web stabilization device may comprise, for example, a guide track in which the present web train is particularly durable. It is also conceivable that the web is supported during the interruption of the longitudinal separation process, for example by rollers which form a nip immediately in front of and / or behind the parting line in order to reliably avoid cracking.

It is also of particular advantage if the slitter-winder has a separating device by means of which the finished rolls interconnected in the winding bed can be separated in the winding bed or outside the winding bed.

In principle, a separating device outside of the winding bed is initially preferred for economic reasons, since the changeover time required to dispense the finished set of rolls and to prepare the new winding process is very low and very durable and brings the productivity of the roll winding device to a high level bar is. For this purpose, it can be provided, for example, that the outlet bevel already described in connection with the embodiment of the method according to the invention is designed arcuate, whereby transverse forces are automatically effective on the connections when rolling out the finished rolls.

However, by providing a separator for the defined cutting relationship separation design is preferred in most cases, and in some cases unavoidable.

Such a separating device may in this case have a plurality of separating units which are preferably positionable in the cutting section of the slitter-winder along the Y direction, similar to the separating units, generally consisting of upper knife and pot knife. As separation media are then defined and undefined cutting, that is sanded or with abrasive bodies occupied blades or wires in question. It is also possible to use thermal separation devices, such as laser cutting devices. Finally, a pressurized fluid jet, for example a jet of water or air, can also be used.

In a very particularly preferred embodiment, the separating device consists of two sub-devices, which are arranged on opposite peripheral regions of the finished rolls to be separated. Both partial devices preferably have a plurality of units which can be positioned along the Y-direction, which units can preferably be positioned synchronously with one another and can be brought into operative connection with one another.

The units of a subdevices form the actual separation units and can be designed as just described. The units of the other sub-devices are designed as relatively narrow pressurizing means, by means of which on the parting lines between two adjacent finished rolls can be acted upon. In this way, the region of the parting line inclined towards the separating unit is widened and the areas of the winding layer (s) which connect the finished rolls are stretched so that ideal separation conditions are present.

Such a separating device can also be combined with the dispensing device by means of which the finished roll sets can be removed from the winding bed.

The invention is explained in more detail below with reference to exemplary embodiments with reference to the drawings. It shows

1 a schematic representation in side view of a slitter according to the invention

2 a schematic representation of an exemplary embodiment of an advantageously designed longitudinal separation section

3 a highly abstracted representation of a connection of two adjacent partial webs by interrupting the longitudinal separation process

4 Sectional view of juxtaposed ready rolling in a common Winding bed which were wound by means of a winding method according to the invention

5 exemplary embodiment of a compound according to the invention generated two adjacent sub-web roles in a side, partially cut representation

In 1 is a highly schematic way a slitter according to the invention 1 represented in the left image area an unwinding device 2 in which a paper or board web M from a parent roll 3 is developable. The paper or board web M is then through a longitudinal separation section 4 feasible, in the example shown as a longitudinal cutting device with positionable in y-direction format selection knife pairs 23 is realized, with each pair of knives 23 by a driven disk-shaped upper or cutting blade 16 and a revolving bottom or pot knife 17 is formed. The longitudinal cutting section 4 is in the x-direction by a front and a rear guide roller 11 limited, which of course can also consist of individual segments. The paper or board web M is then in the course in a, two axially parallel support rollers 18 . 19 , formed winding bed 6 feasible in the y-direction frontally juxtaposed partial web or finished rolls 7 are imageable.

This is at least one of the two support rollers 18 . 19 drivable. Preferably, however, both support rollers 18 . 19 drivable and are available via a common control and / or regulating device 20 in connection. It has been proven that when, in the direction x of the paper or board web M first support roller 18 speed controlled and the second support roller 19 is torque-controlled. Also, an elastic storage of at least one support roller 18 . 19 conceivable. Likewise, the axes can 21 . 22 the support rollers 18 . 19 be stored at different height levels in the z direction. Furthermore, the support rollers 18 . 19 have different diameter. Of course, at least one of the two support rollers 18 . 19 also one, on the paper or board web M becoming effective

Coating or sheathing, while, for example, the other support roller 18 . 19 is designed as a steel roller. Furthermore, at least one of the support rollers 18 . 19 have a passive or active damping or a repayment element. However, these advantageous embodiments are known to the person skilled in the art and are not shown here in detail for reasons of clarity.

In the example shown, the - at least at the beginning of the winding process - aligned successively winding cores 15 ' in its axial extent the distance between two adjacent pairs of blades 23 the longitudinal dividing part 4 correspond. The winding tubes 15 ' may preferably consist of cardboard or plastic. The most common diameter parameters in the market are 75 mm and 150 mm. To influence on the winding hardness profile, in particular at the beginning of a respective winding process and for stabilizing influence, in particular in the further course of the respective winding process, has the illustrated slitter 1 a pressure roller device 24 on. This consists in the example shown of several, in the y-direction one behind the other and together on a movable in the z-direction traverse 26 arranged Andruckwalzensegmenten 25 , In further embodiments, not shown, these Andruckwalzensegmente 25 also together or independently of each other laterally along the circumference U of the forming Teilbahn- or finished rolls 7 be relocatable.

The carrier rolls 18 . 19 and the pressure roller segments 25 the pressure roller device 24 are collectively referred to as winding rollers, by means of the Teilbahn- or finished rolls 7 are bildbild and during each winding process together with these a winding system 8th form in which mutually outgoing oscillations interact with each other.

As already described, such vibrations can arise for a variety of reasons and usually negatively impact each other negatively on the winding process and the winding result. Not infrequently, the maximum winding speed V is limited by vibrations occurring, and occasionally, especially in simpler paper or board grades, certain quality losses are already accepted.

At least part of the indicators responsible for these vibrations is due to a certain mutual freedom of movement of being next to each other in the changing bed 6 forming Teilbahn- or finished rolls 7 due.

According to the invention, at least two of the at least two partial web rolls or finished rolls forming side by side are produced 7 connected during the winding process by brief interruption of the longitudinal separation process with each other for the further course of the winding process.

As in 3 shown then run the two adjacent and at least one section 27 connected sub-webs M 'short term as an unseparated web in the winding bed 6 one. The length of the section 27 can, depending on the design of a slitter according to the invention 1 always be the same measure. Preferably, the longitudinal dividing part 4 the slitter 1 however, designed such that the length of the section or sections 27 is selectable. It is preferred that the length of the respective section 27 corresponding to the current diameter D of the forming Teilbahn- or finished rolls 7 and the current winding speed V, possibly also present acceleration or deceleration characteristics, is adaptable such that a compound of the adjacent sub-web roles 7 over 1 to 20 winding layers, preferably over 1 to 10 winding layers, very preferably over 2 to 5 winding layers results. Of course, the winding layers do not have to be reached in integer steps.

For better separability of the connection, it is quite preferred that the winding layers are not completely connected in itself, but that the longitudinal separation process is interrupted in short successive periods and resumed. In such a trained, in 5 can be reached, for example, two free spaces F within the connecting section 27 form, which, starting from the partial web or finished rolling center, opposite, so a common escape with the winding tube 15 ' form. It is then very preferred that the free spaces F form a clearance, which is slightly larger than the diameter of the winding tube used 15 so that a separation medium, such as a blade 28 , in the free space F is insertable, and the connection is separable from the inside out. This is one, possibly during the winding process under the winding load elongated winding tube 15 ' So do not hurt or hinder the separation process.

In 2 is an exemplary embodiment of a longitudinal separation section 4 shown according to the description too 1 as knife pair 23 is trained. The disc-shaped cutting blade 16 stands for rapid mobility with two electromagnets 29 in operative connection and is seen in the z-direction between two by the two electromagnets 29 predeterminable positions reversible, with the cutting blade 16 is in a position P within the paper or board web M to be separated and is in the other position P out of operative connection with the material web M to be separated. To collisions with the pot knife 17 To prevent this is laterally, so along the y-direction, movably arranged. The contact of the two knives 16 . 17 is then first by lateral method of the pot knife 17 solved, then enters the cutting blade 16 short-term out of operative contact with the paper or board web M to be separated and, after resumption of the separation process, the pot knife still in rotation pivots 17 back to. Preferably, the entire process takes place within one second, more preferably even fractions of a second. To avoid unwanted cracking is a web stabilization device 10 intended. The here immediately before and behind the knife pair 23 arranged guide rollers 11 then form associated with them secondary roles 12 Nips (ie nips), the cracking of the interrupted cut seam 30 reliably prevent.

Of course, the longitudinal part can 4 be formed using other separation media. For example, laser separation methods or the like can be used.

In the 1 shown ejector devices 14 of which, of course, only the foremost one can be seen in the side view shown, are along the Y-direction corresponding to the individual longitudinal separating devices of the longitudinal dividing section 4 positionable and act when ejecting, that is to say exactly when ejecting or rolling, the finished rolls 7 on the joints between two adjacent and inventively connected finished rolls 7 , As a result, stretch the joints and can be separated in a suitable manner to form a particularly accurate and clean separation or cutting edge of each other. It is economically advantageous that no additional production time is required by the temporal overlap of the ejection process and the separation process and high efficiency of the slitter 1 is guaranteed.

From the illustrated embodiments may be departed from in many ways, without departing from the spirit of the invention.

LIST OF REFERENCE NUMBERS

1

Winder

2

unwinding

3

motherhood

4

Long racing game

5

takeup

6

winding bed

7

Partial web roll, finished roll

8th

winding system

9

sensor

10

Track stabilizing device

11

deflecting

12

secondary role

13

separator

14

ejector

15

mandrel

15 '

mandrel

16

Upper knife, cutting knife

17

Bottom knife, pot knife

18

king roll

19

king roll

20

Control / regulating device

21

axis

22

axis

23

pair of blades

24

Andruckwalzeneinrichtung

25

Andruckwalzensegment

26

traverse

27

section

28

blade

29

electromagnet

30

separating seam

D

diameter

F

free space

M

web

M '

part web

P

position

P '

position

U

scope

V

Web speed, winding speed

X

Longitudinal direction, MD, running direction

Y

Transverse direction, CD

Z

height direction

Claims (16)

Winding method in which a material web (M), in particular a paper or board web, from a parent roll ( 3 ) and to form ready-made rolls ( 7 ) is split in a longitudinal separation process along its running direction (x) and subsequently wound up again, wherein at least two finished rolls forming during a winding process ( 7 ) side by side in a common winding bed ( 6 ) under the influence of winding rollers ( 18 . 19 . 25 ), wherein the forming finished rolls ( 7 ) and the winding rollers ( 18 . 19 . 25 ) Parts of a common winding system ( 8th ), characterized in that the longitudinal separation process is interrupted and resumed at least once during the winding process. Winding method according to claim 1, characterized in that the interruption and resumption of the longitudinal separation process is based on collected measurement data. Winding method according to claim 1, characterized in that the interruption and resumption of the longitudinal separation process is initiated on the basis of a defined program sequence. Winding method according to one of claims 1 to 3, characterized in that the longitudinal separation process shortly before or upon reaching a critical natural frequency of the winding system ( 8th ) or at least one part ( 7 . 18 . 19 . 25 ) of the winding system is interrupted. Winding method according to one of claims 1 to 4, characterized in that the longitudinal separation process is interrupted for less than 1.5 seconds, preferably for less than 1 second, and most preferably for only a few 10ths or 100ths of a second. Winding method according to one of claims 1 to 5, characterized in that the longitudinal cutting process at a web speed (V) of more than 800 meters per minute, preferably more than 1200 meters per minute, and preferably more than 1500 meters per minute interrupted and again is recorded. Winding method according to one of claims 1 to 6, characterized in that the longitudinal separation process comprises a plurality of temporally parallel and over the CD direction (Y) of the material web (M) distributed individual separation processes and only a part of the individual separation processes is interrupted overlapping in time. Winding method according to one of claims 1 to 7, characterized in that the- or those individual separation processes, which seen the material web in the CD direction (Y), interrupted in its central region longitudinally interrupted and resumed, while the marginal Einzeltrennprozesse be maintained. Winding method according to one of claims 1 to 8, characterized in that the finished rolls to be joined ( 7 ) according to format and position in the winding bed ( 6 ) are selected so that a single interruption and resumption of the slitting process is sufficient to achieve the critical vibration states of a part ( 7 . 18 . 19 . 25 ) of the winding system or of the winding system ( 8th ) over the entire winding process. Winding method according to one of claims 1 to 9, characterized in that the forming finished rolls ( 7 ) on a common winding tube ( 15 ) or each own winding cores ( 15 ' ). Winding method according to one of claims 1 to 10, characterized in that the interconnected finished rolls ( 7 ) during or after ejection from the winding bed ( 6 ) are separated by means of a mechanical, thermal or fluid-based separation process. Slitter ( 1 ) which is an unwinding device ( 2 ) for a mother role ( 3 ), in which a material web (M), preferably a paper or board web, from a parent roll ( 3 ) is unwound, also a longitudinal parting line ( 4 ), in which the material web (M) in the longitudinal direction (X) is separable and a take-up device ( 5 ), which has a winding bed ( 6 ) includes in the at least two front side juxtapositionable finished rolls ( 7 ) under the influence of winding rollers ( 18 . 19 . 25 ) and the forming finished rolls ( 7 ), and the winding rollers ( 18 . 19 . 25 ) Parts of a common winding system ( 8th ), characterized in that the longitudinal part ( 4 ) is designed such that the longitudinal separation process during the winding process is interruptible and resumable. Slitter ( 1 ) according to claim 12, characterized in that the longitudinal dividing part ( 4 ) is designed such that the longitudinal separation process within 1.5 seconds, preferably within 1.0 seconds, most preferably preferably within a few 10th or 100th of seconds is interruptible and resumable. Slitter ( 1 ) according to one of claims 12 or 13, characterized in that at least one sensor ( 9 ) for at least indirectly receiving at least one of the following parameters: - speed (V) of the material web (M) and / or at least one part web (M ') - peripheral speed of the forming finished rolls ( 7 ) - peripheral speed of at least one winding roller ( 18 . 19 . 25 ) - Vibration state of at least one part ( 7 . 18 . 19 . 25 ) of the winding system and / or the entire winding system ( 8th ) - Diameter (D) of the forming finished rolls ( 7 ) in the form of individual individual measurements - axial movement of at least one forming finished roll ( 7 ) - rocking movement of at least one forming finished roll ( 7 ) - pressure contact in the nip between at least one winding roller ( 18 . 19 . 25 ) and at least one forming roll ( 7 ), preferably between all participating winding rollers ( 18 . 19 . 25 ) and all forming finished rolls ( 7 ) - in the still undivided web (M) and / or in at least one sub-web (M ') present train Slitter ( 1 ) according to any one of claims 12 to 14, characterized in that in the region of the longitudinal dividing part ( 4 ) a web stabilization device ( 10 ) is provided. Slitter ( 1 ) according to one of claims 12 to 15, characterized in that the slitter-winder ( 1 ) a separating device ( 13 ), by means of which in the winding bed ( 6 ) interconnected finished rolls ( 7 ) in the winding bed ( 6 ) or outside the changing bed ( 6 ) are separable.

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