Method for positioning cutting devices of a longitudinal cutting device for a material web in a roll-cutting machine

Abstract

The invention relates to a method for positioning cutting devices for a time-optimized format change during the longitudinal cutting and winding up of a running material web (3), in particular a paper or cardboard web, in a roll-cutting machine (1) to form a plurality of finished rolls formed from individual material web layers, by means of at least one longitudinal cutting device (2) which comprises at least three cutting devices (2.1, 2.2, 2.3, 2.4, 2.5, 2.n), and wherein at least one cutting device is situated in a cutting state at a first cutting position (S1, S2, S3, S4, S5) and produces a longitudinal cut in a first format before a format change position (13), and at least one cutting device (2.n) is situated in a standby state, and wherein a stepless adjustment (231, 232, 233, 234) of at least one cutting device (2.1, 2.2, 2.3, 2.4, 2.5, 2.n) transversely with respect to a running direction (L) of the material web (3) is carried out timewise before and / or after the format change position (13) and is coordinated with severing of the material web (3) transversely with respect to the running direction (L) in such a way that a severing position corresponds to the format change position (13) of the material web (3).

Description

[0001] Method for positioning the cutting device of a longitudinal cutting device for a material web in a roll cutting machine

[0002] The invention relates to a method for positioning cutting devices for a time-optimized set and format change during the longitudinal cutting and winding of a running material web, in particular a paper or cardboard web, in a roll cutting machine into several finished rolls formed from individual material web layers, by means of at least one longitudinal cutting device which comprises at least three cutting devices, and wherein at least one cutting device is in a cutting state at a first cutting position and produces a longitudinal cut in a first format before a format change position and at least one cutting device is in a waiting state, and wherein at least one previous set change of the finished rolls, preferably with the same first format, is carried out, and wherein during a subsequent, combined set and format change, a second,a new format is set and the at least one cutting device produces a new longitudinal cut at a second, new cutting position, and wherein an adjustment of at least one cutting device transverse to a running direction of the material web is carried out in a time-controlled manner before and / or after reaching the format change position, and is coordinated with a separation of the material web transverse to the running direction such that a separation position corresponds to the format change position of the material web.

[0003] The invention is explained below in connection with the treatment of a paper web. However, it is also applicable to other material webs that require similar handling. These include, for example, but are not limited to, webs of cardboard, paperboard, plastic, or metal foil.

[0004] Paper webs are produced in relatively large widths of up to over 11 meters in a paper machine. The paper web is produced virtually endlessly. The running direction of the material web in the paper machine defines the longitudinal or x-direction in a clockwise coordinate system, and the transverse or y-direction in the horizontal plane of the material web.

[0005] At the end of the paper machine, the produced paper web is wound onto a winding core in its full width. This winding core is replaced cyclically, usually during ongoing production. The resulting web-wide winding roll is commonly referred to as a mother roll or full reel.

[0006] To be manageable for a subsequent user, such as a printing company, the paper web wound on a master roll must be cut into several parallel sub-webs, each with a width suitable for the respective subsequent user. These widths can vary considerably from case to case, so the paper web is usually divided according to an individually definable cutting pattern or format. This is usually done in a downstream roll cutting machine.

[0007] Such slitting machines with at least one longitudinal cutting device are known, for example, from German utility model DE29812753 U1. These slitting machines, which have multiple longitudinal cutting devices, produce individual, narrower wound rolls or so-called finished rolls from a wide material web of a parent roll. Through additional cross-cutting, several sets of finished rolls are usually produced from one parent roll. To produce different finished roll formats, cutting devices in the form of individual pairs of knives can be positioned transversely to the direction of travel of the material web.

[0008] In a known manner, the knife pairs, usually in the form of circular knives, each consist of a lower knife, a cup knife, or a counter knife that supports the web during cutting, and an upper knife or pointed knife that plunges into the web, the cutting edges of which must be positioned precisely relative to one another in the desired cutting position. Typically, the lower knife is driven, while the pointed knife, as the upper knife, is freely rotatably mounted. This is described, for example, in the German patent DE3419843C2. As is known in the prior art, a slitting machine is used to cut a material web lengthwise into partial webs, usually having a smaller width. These partial webs are wound up in the slitting machine into so-called finished rolls, shipping rolls, winding rolls, or partial rolls, and together form a finished roll set, a finished roll set, or a so-called "set."

[0009] The typical process in a slitter-reel machine with at least one slitting device and a subsequent rewinder is explained using the following example. For simplicity, we will assume that a total of three finished roll sets are produced and that the material web is already guided semi-automatically or fully automatically through the entire system in the usual way, all the way to the rewinder and the winding cores or cores located there. There, once the material web has been divided into sub-webs following activation of the slitting device, it is attached to a winding core set or core set located in the winding bed. The actual production process can now begin, in which the sub-webs are wound under tension around the winding cores to form finished rolls comprising several layers of material web.

[0010] Once the first set of finished rolls has been wound, a first "set change" takes place, i.e. the partial webs are separated transversely to the running direction, the finished roll set is ejected and the newly formed web beginnings of the partial webs are attached to a new core set. This "set change" usually takes place when the material web is at a standstill. In the present application, "set change" is understood not only to mean the process of ejecting the finished roll set when the material web is at a standstill, but the term "set change" encompasses the entire period and process steps between leaving the stationary, constant production speed of the previous finished roll set until the full production speed of the new finished roll set is reached again. The process sequence is also described in detail in the following figure description of Figures 5a to 5c.This period is used for all efficiency evaluations and can therefore also include further process steps at other material web speeds.

[0011] After the downtime due to the set change, production of a second set or a second set of finished rolls is started and completed. The above processes are then repeated over and over again. The formats or widths of the finished rolls correspond to the widths desired and requested by the end customer and can vary greatly. For this reason, the finished roll formats in a slitter-reel machine can change several times during production, in extreme cases from one set to the next, which means that only one set of finished rolls with the same format is wound. If the width of the desired finished rolls changes and a so-called "format change" is carried out, the cutting devices of the slitter-reel device are adjusted to the desired distance from one another in the width direction or across the running direction of the material web.This means that the finished rolls are produced in a new, desired width or in a new format or new cutting pattern.

[0012] Once the second set of finished rolls has been completed, a so-called format change, cutting pattern change, or width change of the partial webs is carried out during the second set change – usually while the system is at a standstill. This format change for the third set of finished rolls is usually initiated shortly before the end of the second winding process because, depending on the geometry of the slitter-reel machine, a certain length of the material web still has to be fed to the cutting device, which separates the web transversely to the running direction and forms the web end or web beginning of the partial webs. This usually results in another line stoppage, in addition to the second set change-related stoppage, because the cutting devices are adjusted transversely to the running direction when the system is at a standstill.The usual sequence of operating states is: braking from full production speed; standstill for the format change; continuing at creep speed; standstill for set change, during which the material web is also separated transversely to the running direction; fastening the new web start of the material web to the new winding core set; starting to wind the first layers onto the new winding cores and ramping up to full production speed.

[0013] If a format change occurs during the second set change, i.e., a combined "set and format change," a new core set corresponding to the new widths is inserted, and a third set of finished rolls with a new format setting is produced. The above processes are then repeated.

[0014] The time range required for a set or combined set and format change relevant to the winding process is usually determined from the time the production speed of the previous set is left until the production speed of the new finished roll set is reached.

[0015] In comparison to the set change, the combined set and format change includes at least one process step that includes the format change.

[0016] Adjusting the cutting devices changes the cut settings in the material web. In conjunction with the change in the cut settings of the longitudinal cutting device in a slitter, the width of the edge trim can also change. The edge trim or edge strip remaining at the edge of the material web is guided through a discharge device to a pulper.

[0017] In order to perform at least one format change (also known as a pattern change) in the material web, the slitter-rewinder must be shut down. With the material web also at a standstill, at least one pair of knives is then retracted from the material web, positioned at the new cutting position using at least one adjusting device, and then retracted into the material web. The slitter-rewinder can now be restarted.

[0018] Unfortunately, this current procedure for changing patterns or formats has the major disadvantage that, on the one hand, the slitter-rewinder must be shut down, and, on the other hand, the changeover is very time-consuming. This reduces the slitter-rewinder's production capacity.

[0019] Typically, a slitter-rewinder goes through the following normal "process steps" during the rewinding process, which are usually assigned a corresponding speed of the material web in the running direction. Process steps 0 to 6 are further described in the following description and in detail in the description of Figure 5. The process steps are defined by a time range. These are the steps:

[0020] 0. Format change, standstill or constant speed greater than 10 m / min of the material web

[0021] 1. Threading a new web start when the material web is at a standstill

[0022] 2. Acceleration, winding with accelerating material web

[0023] 3. Production speed, winding at a constant, adjustable speed of the material web

[0024] 4. Braking, winding up with braking, decelerating material web

[0025] 5. Separation, separation of the material web across the running direction with a separating device at standstill or at a constant speed greater than 10 m / min of the material web

[0026] 6. Ejection, Ejection of a fully wound roll set from the slitter-winder when the material web is at a standstill

[0027] The "operating state of the cutting device" means that each individual cutting device included can assume a "cutting state" or a "waiting state." In the "cutting state," the cutting device is engaged with the material web and cutting it; in the "waiting state," the cutting device is disengaged so that no cut is made in the material web.

[0028] "Cutting position" refers to a constant, fixed position of the cutting devices in the direction of travel of the material web, but a variable position perpendicular to the direction of travel of the material web. Typically, each cutting device is assigned a cutting position perpendicular to the direction of travel, in which the cutting device is engaged or disengaged from the material web, depending on the operating state.

[0029] The control unit of the roll cutting machine ensures that, depending on the process step of the rewinding process, the cutting devices are in the correct cutting positions and that the correct operating state (cutting state or standby state) of the cutting device is set.

[0030] A "format change" refers to a process step in which the cutting devices are adjusted transversely to the direction of travel from an old cutting position to a new cutting position. This process step, or the format change, is assigned at least one time range and one material web range in the direction of travel of the material web. The at least one time range can include different process steps for adjusting the cutting devices. The time range of the format change typically begins at the point in time at which at least one cutting device changes operating mode or the adjustment transversely to the direction of travel of the material web begins.For example, the format changeover time range can extend from the change in the operating state of at least one cutting device, preferably to a standby state, the adjustment of the cutting device transversely to the running direction, to the renewed change in the operating state of the at least one cutting device, preferably to a cutting state. Alternatively, it is possible for the format changeover time range to begin at the time of the start of an adjustment transversely to the running direction from an old, previous cutting position and end with the reaching of a new cutting position.

[0031] Furthermore, a material web area or a position in the running direction of the material web is assigned to the format change, where the cutting positions are usually adjusted. This material web area can, at a minimum, occupy a line or a format change position perpendicular to the running direction on the material web when the material web is at a standstill, or, in the case of a material web moving at a certain speed, it can be assigned an area with an extension or length in the running direction. "Set change" refers to the time period and the process steps it encompasses between leaving the stationary, constant production speed of a previous finished roll set until the stationary, constant production speed of the new finished roll set is reached again.A "set change" includes at least process steps 4, 5, and 6 of the previous set and steps 1 and 2 of the new, subsequent set in the rewinding process. The set change of a finished roll set marks the beginning of the rewinding process for the corresponding finished roll set.

[0032] "Combined set and format change" refers to the time period of the set change described above and at least one further process step 0 of a format change in the cutting state OS and / or the waiting state 0W of at least one cutting device. The combined set and format change of a finished roll set occurs at the beginning of the rewinding process of the corresponding finished roll set.

[0033] "Production speed" refers to a process step in the winding process of a finished roll set with a longer period of time than the other process steps and a steady, constant speed of the material web. The level or value of the steady-state speed can be adjusted depending on the existing material web properties, the number of longitudinal cuts, and / or operator inputs in the control system. The absolute value can vary from finished roll set to finished roll set.

[0034] “Braking” or “acceleration” refers to two further process steps in the winding process which can be characterised by a transient progression of the speed of the material web, preferably a braking or an acceleration; a portion of the finished rolls is also wound up in these steps.

[0035] "Automatic" means that during normal operation of the slitter-reel machine, there is no manual interaction by the operator to change the width of the finished rolls. "Adjustment" refers to the adjustment of at least one cutting device included in a slitter-reel device, transverse to the direction of travel of the material web. The adjustment is continuous, without, for example, a grid. The adjustment range extends at least across the entire width of the slitter-reel device and thus usually across the width of the material web.

[0036] A "control system" is understood here as the entirety of the functional components required to perform control and regulation tasks, as well as their interconnections. This includes control units, regulators, devices for acquiring actual values, disturbance variables, and control devices, as well as their interconnections.

[0037] The object of the invention is to provide an improved method for positioning cutting devices in a slitting device for a time-optimized combined set and format change during the slitting of a moving material web, in particular a paper or cardboard web, in a roll cutting machine. The time required for the format change is further reduced and designed in such a way that the time required for the format change has a smaller impact on the overall rewinding process in a roll cutting machine. This leads to significant production increases, even with minor optimizations in the range of seconds, especially for end customers who handle a wide variety of formats and change formats or cutting patterns several times a day.

[0038] A further object of the invention is to implement the above-mentioned objective not only for new slitter-rewinders, but also particularly advantageously for the modernization of existing older slitter-rewinders with an existing longitudinal cutting device as defined in the preamble. The utilization of the slitter-rewinder can be advantageously increased through the modernization while simultaneously reducing investment costs. The present invention is characterized by the features of the independent claims. Advantageous embodiments can be found in the subclaims, the description, and the drawings.

[0039] Advantageously, the cutting devices are adjusted while the material web is moving and the cutting device is engaged with the material web, thus creating a longitudinal cut at a cutting position in the running direction of the material web. This results in a cut at a specific angle in the running direction of the material web, which deviates from the longitudinal cutting direction in its orientation in the plane of the running direction and transverse to the running direction.

[0040] Advantageously, format changeover times are significantly shorter, as the adjustment takes place while the material web is running, and the time saved can result in significant increases in production capacity.

[0041] In an alternative embodiment, an adjustment of the at least one cutting device in the standby state is carried out in such a way that a1) the at least one cutting device in the standby state is adjusted in time before the combined set and format change and is positioned in a second, new cutting position; and b2) the at least one cutting device in the standby state is brought into the cutting state in a controlled manner at the format change position during the combined set and format change.

[0042] In an alternative embodiment, the adjustment of the at least one cutting device is carried out in the waiting state, before the combined set and format change, with a material web moving at a speed, preferably with a material web moving at production speed.

[0043] In an alternative embodiment, an adjustment of at least a first cutting device, which is in a cutting state at a first cutting position, and of at least a second cutting device, which is in a waiting state, is carried out in such a way that b1) the at least one first cutting device, which is in a cutting state, is brought into a waiting state during the previous set change and interrupts a first longitudinal cut at a first cutting position; b2) the at least one first cutting device is adjusted in the waiting state and positioned in a second, new cutting position; b3) the at least one second cutting device is adjusted in the waiting state during the previous set change and positioned in the first cutting position of the first cutting device;b4) the at least one second cutting device in the standby state during the preceding set change is brought into a cutting state such that the old longitudinal cut is continued; b5) the at least one first cutting device in the standby state is brought into a cutting state in the second, new cutting position during the combined set and format change at the format change position.

[0044] In an alternative embodiment, after step b5), step b6) is further carried out in such a way that b6) the at least one second cutting device in the cutting state is brought into a waiting state at the format change position during the combined set and format change.

[0045] In an alternative embodiment, the adjustment of the at least first cutting devices in the standby state and the at least second cutting device in the standby state is carried out during a previous set change when the material web is at a standstill.

[0046] In an alternative embodiment, an adjustment of at least a second cutting device, which is in a cutting state at a first cutting position, is carried out in such a way that c1) the at least second cutting device is adjusted in the cutting state during the combined set and format change with a material web moving at a speed, preferably directly before or after a format change position, in such a way that a new cutting line is produced which runs in the material web and deviates from the running direction to transverse to the running direction.

[0047] In an alternative embodiment, the adjustment of the at least one cutting device is carried out in the cutting state during the combined set and format change with a material web moving at a speed.

[0048] In an alternative embodiment, the adjustment of the cutting devices, which are in a cutting state, during the combined set and format change, is carried out at a speed of adjustment of the cutting devices transverse to the running direction of the material web of less than or equal to 100%, in particular less than or equal to 56%, in particular preferably substantially 56%, of the speed of the material web.

[0049] Advantageously, an optimal cutting angle for the cutting device for a high-quality cut is achieved with an appropriate adjustment speed according to the above parameters. This cutting angle must not be too blunt, nor must the adjustment speed be too high, as this would adversely affect the reliable removal of the edge strip. Furthermore, the cutting device with the corresponding lower and upper blade devices remains oriented in the material web plane with its preferred orientation in the longitudinal direction. Adjustment with the above parameters transverse to the running direction does not lead to a build-up of the material web at the cutting device and / or an interruption of the longitudinal cut, despite a deviation from the optimal cutting direction in the longitudinal direction.

[0050] In an alternative embodiment, a material web section upstream of the format change position is wound onto a previous finished roll set. In an alternative embodiment, a material web section downstream of the format change position is wound onto a new finished roll set.

[0051] Advantageously, the adjustment can be performed before, during, and / or after the format change position and ideally leads to a limitation of the size-change material web area in the running direction, thus reducing the amount of cut caused by the non-longitudinal cut. The downstream material web area is wound along with the first few meters of the new material web or new partial webs onto a new finished roll set or the first inner layers of the new finished roll set. The upstream material web area is wound along with the last few meters of the almost completely wound finished roll set or the last outer layers.The first and last meters of a finished roll set are typically marked as scrap for further production due to potential splices or other contamination, for example. The first and last meters of a finished roll are typically treated as scrap for machine-technical reasons to ensure clean threading. The area of ​​the material web used for the format changeover is therefore within the otherwise usual scrap area and therefore does not negatively impact production.

[0052] In an alternative embodiment, the cutting devices all cut the material web in a longitudinal cutting device, in particular in the same imaginary plane.

[0053] Advantageously, all cutting devices are integrated into a single slitting device, thus significantly reducing complexity and costs.

[0054] Advantageously, the integration into an imaginary knife plane, which extends transversely to the running direction and the rotation centers of the upper and lower knives, can result in several advantages. For example, the number of guide rollers required to guide the material web can be reduced to a minimum, usually a maximum of two guide rollers. Furthermore, the number of required discharge devices for the edge trim and / or for a new thread or web break in the slitter-winder can be used, which reflects further savings and a reduction in complexity and thus also less maintenance expenditure.

[0055] In an alternative embodiment, at least one, preferably two, cutting devices arranged at the edge of the longitudinal cutting device cut at least one edge strip.

[0056] In an alternative embodiment, the adjustment of the at least one cutting device in the cutting state and / or waiting state is carried out at a speed of the material web greater than 10 m / min, in particular greater than 40 m / min, particularly preferably greater than 80 m / min.

[0057] Advantageously, the time-optimized adjustment of the knives takes place at a material web speed greater than 10 m / min. The adjustment can take place at a preferably constant creep speed and / or during the transient braking process from production speed. Furthermore, the time required to adjust the cutting devices for the changeover process can advantageously be further optimized by allowing the adjustment of the edge cutting devices to take place during braking, i.e. dynamically, of the material web from production speed. This shifts the adjustment to an area of ​​the winding process that is usually determined by parameters not related to the format change, such as the inertial masses of the rolls, and thus further reduces or completely eliminates the time required at creep speed.

[0058] The invention is explained below with reference to figures. The invention expressly extends to embodiments that are not defined by feature combinations from explicit references to the claims, whereby the disclosed features of the invention can be combined with one another—as long as this is technically reasonable. Corresponding elements of the embodiments in the figures are provided with the same reference numerals. The functions of such elements in the individual figures correspond to one another, unless otherwise stated and unless contradictions arise. A repeated description is therefore omitted.

[0059] It should also be noted that the differing features of the illustrated embodiments can be interchanged and combined with one another. The invention is therefore not limited to the combinations of features shown in the illustrated embodiments.

[0060] The figures show in detail:

[0061] Fig.1 A simplified and schematic side view of the structure of a slitting device in a roll cutting machine.

[0062] Fig.2 A simplified and schematic plan view of a material web moving in the running direction with an exemplary format change of the cutting devices in a longitudinal cutting device, the associated partial webs, edge strips and the resulting cuts in the material web.

[0063] Fig.3a A detailed representation of the cutting position S4 with an alternative exemplary adjustment of the cutting device 2.4 in the cutting state before the format change position.

[0064] Fig.3b A detailed representation of the cutting position S4 with an alternative exemplary adjustment of the cutting device 2.4 in the cutting state after the format change position.

[0065] Fig.4a A detailed representation of the cutting position S4 with an alternative exemplary adjustment of the cutting device 2.4 and 2.n in waiting position and transfer of the longitudinal cut during a previous set change.

[0066] Fig.4b Alternative embodiment to Fig.4a, wherein the longitudinal cut S4 is continued at the format change position and produces a further partial web HX.

[0067] Fig.5a-c An exemplary, schematic temporal sequence of the operating states of a slitter-rewinder with a set change E and a combined set and format change F. Essential components of the slitter-rewinder 1 and the at least one longitudinal cutting device 2 comprised are the at least three cutting devices 2.1 to 2.5 and / or 2.n. Each cutting device comprises a lower knife device 5 and an upper knife device 6. The lower knife device 5 comprises a supporting lower knife 15, a knife holder 11, and a carriage 7. The upper knife device 6 comprises an upper knife 15 which is adjustable in the direction of the lower knife and plunges in, a knife holder 12, and a carriage 8. The upper knife 14 and the lower knife 15 are designed as rotating circular knives by way of example in Figure 1. The two knives 14, 15 are each mounted on a separate knife holder 11, 12 in a rotatable and / or drivable manner.The knife holders 11, 12 are furthermore adjustably connected to a carriage 7, 8 each. The lower and upper knife devices 5, 6 are mounted on a corresponding, associated knife crosshead 9, 10 via the carriages 7, 8, so that they can be adjusted transversely to the running direction L. Each carriage 7, 8 is controllable via at least one associated adjusting device 17, 18 via a control unit 21 and adjustable transversely to the running direction L of the material web 3, in the material web width direction.

[0068] The cutting devices 2.1 to 2.5 or 2.n can assume at least one "operating state," typically distinguishing or switching between a "cutting state" and a "waiting state." In the "cutting state," the cutting device is engaged with the material web 3 and cuts it; in the "waiting state," the cutting device is disengaged so that no cut is produced in the material web 3.

[0069] Preferably, the upper knife device 6 can enable extension or adjustment substantially orthogonal to a material web surface via the knife holder 12 of the upper knife 14.

[0070] The control unit 21 controls the operating state of the upper knife device 6 and the lower knife device 5. Furthermore, the knives 14, 15 can be adjusted in terms of their insertion depth, angle of attack relative to the material web, and contact pressure by the knife holders 11, 12. These adjustments can be either manually adjusted by the operator or automatically controlled by the adjustment device and the control unit. If the cutting device is in a "cutting state," the upper knife 15 is engaged with the material web 3 and performs a cut, preferably a longitudinal cut, in the material web 3.

[0071] If the cutting device is in a “waiting state”, the upper knife 15 is usually not in engagement with the material web 3 and does not perform a cut, preferably no longitudinal cut, in the material web 3.

[0072] Advantageously, the edge trimming 16 or edge strip cutting is performed by the outer cutting devices 2.1, 2.5 or edge cutting devices 2.1, 2.5 arranged at the edge of the material web, which are included in the longitudinal cutting device 2. The resulting edge strips 16, 16.1, 16.2, 16.3, 16.4 are usually not required and are fed via a discharge device 24 to a pulper, pulper, or shredding fan (not shown) for recycling in a machine for producing the material web. The discharge device 24 can comprise simple mechanical elements designed as guide or guiding elements and / or additional elements such as, for example, an edge strip suction device.

[0073] Figure 1 shows a possible embodiment with at least two guide rollers 25, over which the material web 3 is guided across its entire width before and after the longitudinal cutting device 2 and simultaneously supported. This advantageously prevents possible vibrations of the moving material web 3 in the area of ​​the longitudinal cutting device 2.

[0074] The material web 3 is usually drawn off from an upstream master roll (not shown) and guided over possible additional guide rollers or measuring rollers, such as a web tension measuring roller with integrated sensors for controlling the winding and slitting. The material web 3 is then cut into partial webs by the at least one slitting device 2. The partial webs are then wound onto a separate winding core or winding tube (not shown) to form finished rolls. The beginning of a finite section of a partial web is connected to a new winding core and then, by continuously winding around the winding core, is spanned to form so-called material web layers and wound into a finished roll. The dimension of the winding cores in the transverse direction or transverse to the running direction L of the material web 3 essentially corresponds to the corresponding widths of the partial webs I to VII.The winding cores or winding tubes of the finished rolls are usually located next to each other in the transverse direction in a common theoretical winding axis, but it is also conceivable that the winding axes of the finished rolls are located in different positions in the running direction and / or at different heights relative to each other.

[0075] Figure 2 shows a simplified and schematic plan view of a material web 3 moving in the running direction L with an exemplary format change or cutting pattern change of the cutting devices 2.1 to 2.n at a format change position 13 and an upstream material web area 13.1 and a downstream material web area 13.2 in a longitudinal cutting device 2, the associated partial webs I to IX, the edge strips 16.1 to 16.4 and the resulting longitudinal cuts or cutting positions S1 to S11 in the material web 3.

[0076] The longitudinal cutting device 2 and the included cutting devices 2.1 to 2.n remain stationary in the running direction L of the material web 3 and in the same arrangement within the roll cutting machine 1. The cutting devices in the longitudinal cutting device can be continuously adjusted within an imaginary cutting plane 22 transverse to the running direction L and can change their operating state from a "cutting state" to a "waiting state".

[0077] Figure 2 also shows on the right-hand edge a possible assignment to the time periods during the winding up of the material web 3 or the partial webs I to IX, which correspond to the process sequence of the slitter-winder 1 explained in Figures 5a to 5c. The exemplary process sequence contains three finished roll sets D, E and F, whereby the same format of the finished roll set is produced in one finished roll set D and E and a set change E takes place between finished roll sets D and E. In the subsequent finished roll set F, a changed format is produced, which is activated in the combined set and format change F between finished roll sets E and F. For the representation in Figure 2, a non-linear course of time counter to the running direction L must be taken into account. At set change E, the material web 3 is at a standstill for a certain period of time, whereby set change E takes place with a separation transverse to the material web.For the combined set and format change F, the material web 3 can be stationary and / or moving at a certain speed. If the material web 3 is stationary, a certain time range corresponds to the format change position 13. If the material web 3 is moving at a certain speed, the time range corresponds to the material web area 13.1 upstream of the format change position 13 and / or the material web area 13.2 downstream. The separation transverse to the running direction and the corresponding separation position in the material web corresponds to the format change position 13 in the combined set and format change F.

[0078] By way of example, an adjustment 231 of the cutting device 2.5 toward the center of the material web is shown, and an adjustment 232 of the cutting device 2.1 toward a material web edge is shown. It is expressly pointed out that any number of other cutting devices can be adjusted simultaneously in this way, as further illustrated by way of example in Figs. 3a and 3b. The adjustment of the cutting devices 2.1, 2.5, or even all cutting devices, can also be made in the same direction and / or in opposite directions, depending on the desired format.

[0079] While the material web is at a standstill, an adjustment 23 corresponding to the prior art is carried out, which is illustrated by way of example using the cutting device 2.3 and takes place from a first cutting position S3 to a second, new cutting position S9 in such a way that after the material web 3 has come to a standstill, the cutting device 2.3 is brought into the standby state, then undergoes an adjustment 23 transverse to the running direction L of the material web 3 and is then brought back into the cutting state. This is usually followed by an acceleration to a crawling speed for further conveying the material web until the subsequent separation of the material web 3 transverse to the running direction L by a separating device (not shown in detail), and a further standstill for the ejection of the finished roll set E and threading of the severed material web start onto a newly inserted core set.This step is followed in Figure 2 by the acceleration to production speed of the finished roll set F. This also results in a material web area 13.1 before the format change position 13 and a material web area 13.2 after the format change position 13. An adjustment of the cutting devices in both material web areas 13.1 and 13.2 takes place during the production process when braking and / or at a creep speed with the cutting devices in the cutting state. Advantageously, in an alternative embodiment, the adjustment 231, 232 can take place in the cutting state and in creep speed, at speeds of the material web 3 greater than 10 m / min, in particular greater than 40 m / min, preferably greater than 80 m / min. It is necessary that the cutting device is in a cutting state.

[0080] The longitudinal cutting device 2 can keep the cutting devices in the "cutting state" and / or "waiting state" during all operating states. The control unit 21 ensures that, depending on the production state of the roll cutting machine 1, the cutting devices 2.1, 2.2, 2.3, 2.4, 2.5, and 2.n are in the respective correct cutting positions S1 to S30 and that the correct operating state (cutting state or waiting state) of the cutting device is set.

[0081] In a possible alternative embodiment, a sensor integrated into the carriage 7, 8, in particular a magnetic control rod, reports to the control unit 21 the respective position of the cutting device transverse to the running direction L, which can be used as a control signal for adjustment.

[0082] In the exemplary representation in Figure 2, the cutting devices 2.1, 2.5 carry out the edge trimming 16.1, 16.2, 16.3, 16.4 and are referred to as edge cutting devices 2.1, 2.5. The edge cutting devices 2.1, 2.5 cut the edge strip 16.1 in the cutting position S1 and the edge strip 16.2 in the cutting position S5 from the partial webs I and IV of the material web 3 located at the edge. The edge strips 16.1 and 16.2 move like the rest of the material web 3 to at least one discharge device 24. Once the desired diameter of the wound finished roll set E of the partial webs I to IV has been reached, a combined set and format change F can be carried out. The format change takes place at the format change position 13 in the running direction L of the material web 3. The cutting device 2.In this example, cutting device 2.2 creates a longitudinal cut in cutting position S2 before format change position 13, which, for example, is not adjusted during the format change. After the format change, cutting device 2.2 creates the new cut S7 at the same position and divides the new partial webs V and VI. Cutting device 2.2 can remain in the cutting state and / or switch to the standby state and back to the cutting state.

[0083] Furthermore, Figure 2 shows an adjustment 23 of the cutting device 2.4 at the format change position 13 corresponding to the prior art and, alternatively, outlines an adjustment 234 with transfer in the waiting state prior to the format change position 13. The adjustment 234 with transfer is described in Figures 4a and 4b. The cutting device 2.4 cuts the partial webs III and IV and, in the adjustment 23 corresponding to the prior art, is disengaged at the format change position 13 or placed in a waiting state and then adjusted transversely to the running direction L to a new cutting position S10 and then placed back into a cutting state.

[0084] The edge strip 16.2 is separated from the partial web IV by the edge cutting device 2.5 in a cutting position S5 upstream of the format change position 13. The edge cutting device 2.5 is adjusted in the cutting state in an upstream material web area 13.1 upstream of the format change position 13 from its original width to a larger width of the edge strip 16.4 in the downstream material web area 13.2 transversely to the running direction L, here in the direction of the material web center. The new edge strip 16.4 is thereby separated from the new partial web IX by the edge cutting device 2.5 in the new cutting position S11, resulting in a cutting line S5-S11 in the upstream material web area 13.1 that deviates from the longitudinal direction in the transverse direction.

[0085] The speed and the distances to be covered or the adjustment range during the adjustments 231, 232 of the edge cutting devices 2.1, 2.5 transverse to the running direction L, in combination with the movement speed of the material web 3 in the running direction L, result in a transition cutting line S1-S6 and / or S5-S11. In addition, a material web area 13.1 upstream of the format change position 13 and a downstream material web area 13.2 are formed, which are determined by a length 31 in the running direction L of the material web 3.

[0086] In a possible alternative advantageous embodiment, the speed in the transverse direction of the adjustment 231, 232 in the cutting state is controlled such that it is less than or equal to 100%, in particular less than or equal to 56%, in particular preferably substantially 56%, of the speed of the material web 3. In an alternative embodiment, this control can also be applied to adjustment 235, 236, shown in Figures 3a and 3b.

[0087] If the adjustment 232 is carried out after the format change position and in the cutting state of the edge cutting devices 2.1 from a larger initial width of the edge strip 16.1 before the format change position 13 to a smaller width of the new edge strip 16.3 after the format change position 13, the adjustment 232 is only carried out after the format change position 13 has been reached, when the material web 3 is in motion. Such an adjustment 232 after the format change position 13 results in a material web area 13.2 after the format change position on the material web, creating a short material web section or transition material web section with a variable width. The material web section is advantageously wound up with the first or inner material web layers of the new partial web V.

[0088] This has the advantage that the section of material web that is not actually to be used is wound up with the first inner layers of a new finished roll, which is sorted out as waste by the user of the finished rolls through the commonly used transfer techniques using an adhesive or traces of the transfer.

[0089] If the adjustment 231 is performed before the format change position and in the cutting state of the edge cutting devices 2.5 from a smaller initial width of the edge strip 16.2 before the format change 13 to a larger width of the new edge strip 16.4 after the format change 13, the adjustment 231 is performed before reaching the format change position 13, when the material web is still moving. Such an adjustment 232 results in a material web area 13.1 before the format change position 13 on the material web 3, creating a material web section or transitional material web section with a variable width. The material web section is advantageously wound up with the last or outer material web layers of the old partial web IV.

[0090] This has the advantage that the material web section that is not actually to be used is wound up with the last outer layers of an old, almost completely wound up finished roll. Here, too, the end layer is usually glued or otherwise attached to the previous layer and these layers are also usually sorted out as rejects by the user of the finished roll.

[0091] Figure 2 shows, by way of example, another embodiment of the adjustment 233 in the standby state during the production of the previous finished roll set D or E. The adjustment 233 can be carried out when the material web is stationary or moving. The cutting device 2.n in the standby state is adjusted to a new, future cutting position S8 before the combined set and format change F. At the format change position 13 when the material web 3 is stationary or moving, the cutting device 2.n in the standby state is placed in the cutting state at cutting position S8 and cuts the new partial webs VI and VII from each other.

[0092] Figure 3a shows a detailed representation of the cutting position S4 with an alternative exemplary adjustment 235, 235A of the cutting device 2.4, which is in a cutting state, in front of the format change position 13 in an upstream format change area 13.1.

[0093] A cutting device 2.4 which is in the cutting state during the previous set change D and E produces a longitudinal cut at a cutting position S4 and divides the partial web III and partial web IV in the material web 3 for the previous finished roll set D and E from each other.

[0094] If a combined set and format change F is now pending, the cutting device 2.4, which is in the cutting state, is carried out in a material web area 13.1 upstream of the format change position 13 before the format change position 13, which corresponds to the position in the material web 3 which later separates the material web 3 transversely to the running direction L. An adjustment 235, 235A now takes place before the format change position 13, within the upstream material web area 13.1 of the cutting device 2.4 transversely to the running direction L of the material web 3, either to a left edge 235A or a right edge 235 of the material web 3, whereby new partial webs HX and IX are separated from one another and wound onto new winding cores to form new finished rolls. During the adjustment 235 to the right, a second, new cutting position S10 is set.Alternatively, with an adjustment 235A to the left, an alternative, second, new cutting position S10A (shown in dashed lines) can be set.

[0095] This results in a material web section 32, 33 which is limited in length in the running direction L at the end of partial web III and partial web IV in the upstream material web area 13.1 and which has a smaller width 33 for partial web IV towards the end of the web and a larger width 32 for partial web III for the adjustment 235 to the right. Technically, this requires that the material web section 32 of partial web III, which is limited in length and has a larger width at the end of the web, is wound onto the outer material web layers assigned to partial web IV. This slight overlap thus created is very easily torn off or separated from one another by the forces acting during ejection when the finished wound rolls are ejected. The same process applies to the alternative adjustment 235A to the left, but in mirror image.

[0096] Figure 3b shows a detailed representation of the cutting position S4 with an alternative exemplary adjustment 236, 236A of the cutting device 2.4, which is in a cutting state, after the format change position 13 in a downstream material web area 13.2.

[0097] A cutting device 2.4 which is in the cutting state at the previous set change D and E produces a longitudinal cut at a cutting position S4 and separates the partial web III and partial web IV in the material web 3 for the previous finished roll set.

[0098] If a combined set and format change F is now pending, the cutting device 2.4 in the cutting state is carried out in a material web area 13.2 downstream of the format change position after the format change position 13, which corresponds to the position in the material web 3 of the later separation of the material web 3 transversely to the running direction L.

[0099] An adjustment 236, 236A now takes place after the format change position 13 of the cutting device 2.4 transversely to the running direction L of the material web 3 either to a left 236A or a right edge 236 of the material web 3 into a second, new cutting position S10 in the case of an adjustment to the right or a second, new alternative cutting position S10A (shown in dashed lines) in the case of an adjustment to the left, which separates the new partial webs HX and IX from one another, and which are wound up into new finished rolls onto new winding cores.

[0100] This results in a material web section 34, 35 with a limited length at the beginning of the new partial web HX and partial web IX in the downstream format change material web area 13.2, which has a smaller width 35 for partial web HX at the beginning of the web and a larger width 34 for partial web IX for the adjustment 236 to the right. Technically, this requires winding or wrapping the material web section 34 of partial web IX, which is limited in length and has a larger width at the beginning of the web, onto the core or winding mandrel assigned to partial web HX. This slight overlap created in this way is very easily torn or separated when the finished wound rolls are ejected by the forces acting during ejection. The same process applies to the alternative adjustment 236A to the left, but in reverse.

[0101] Figure 4a shows a detailed representation of the cutting position S4 with an alternative exemplary adjustment with transfer 234 of the cutting device 2.4 in the cutting state and a cutting device 2.n in the waiting state before the format change position 13 during a previous set change D or E when the material web 3 is at a standstill.

[0102] A cutting device 2.4 in the cutting state during the previous set change D or E creates a longitudinal cut at a cutting position S4 and separates partial web III and partial web IV in the material web 3 for the currently produced finished roll set D or E. If a combined set and format change F is pending after a previous set change D or E, an adjustment with transfer 234 is carried out while the material web 3 is at a standstill, and the cutting device 2.4 in the cutting state is placed into a waiting state during the previous set change D or E, then adjusted to a new, future cutting position S10, and then held in the waiting state. Essentially simultaneously or slightly delayed in time, in particular less than 2 seconds, an adjustment with transfer 234 of the cutting device 2, which was in the waiting state before the standstill, takes place.n to the previous cutting position S4 of the just adjusted cutting device 2.4. Thereafter, the cutting device 2.n, which is in the waiting state at the cutting position S4, is put into a cutting state, so that the cutting device 2.n, which was in the waiting state before the standstill, receives the cut for the finished roll set D or E from the previous cutting device 2.4 at the cutting position S4.

[0103] The cutting device 2.n remains in the cutting state at the cutting position S4 and at the format change position 13 in the combined set and format change F and is set to the standby state at the format change position 13 when the material web is at a standstill and the cutting device 2.4 in the standby state at the new cutting position S10 is put into the cutting state so that the new partial webs HX and IX are separated from each other and wound onto new winding cores to form new finished rolls.

[0104] Figure 4b shows Figure 4a with a further alternative embodiment in which the cutting device 2.n in the cutting state remains in the cutting state when the material web is at a standstill at the format change position 13 and, in addition to the new cutting position S10, cuts a further partial web X with the new cutting position S30 from the material web 3.

[0105] Figure 5a shows an exemplary and schematic, state-of-the-art, chronological sequence of process steps 0 to 6 and the speed v of the material web 3 on the y-axis of a slitter-rewinder 1 during the winding of three finished roll sets D, E, and F, also called "set(s)." The sequence is described at the beginning of the description and in addition to the state-of-the-art.

[0106] The process begins at any time t on the x-axis in process step 3, production speed, during the winding of a finished roll set D or sets D. The roll cutting machine 1, as well as the included longitudinal cutting device 2 and cutting devices, go through the following process steps, which can also take place in a meaningful, different sequence:

[0107] D3 Production speed, time range with stationary speed of the material web winding up the finished roll set D;

[0108] D4 Braking, time range with variable speed of the material web, further winding of the finished roll set D shortly before completion of the finished roll set D;

[0109] D5 Separation at standstill, time range for separating the material web transversely to the running direction and when the material web is at a standstill;

[0110] D6 Ejection at standstill, time range with standstill of the material web, ejection of the finished roll set D,

[0111] E1 Threading at standstill, time range for attaching the new separated web start of the material web 3 to a new core set for a new finished roll set E;

[0112] E2 Acceleration, time range with variable speed of the material web, start of winding the new finished roll set E;

[0113] E3 Production speed finished roll set E, analog D3;

[0114] E4 Braking of the finished roll set E, analogous to D4;

[0115] FOW format change when the material web is at a standstill, time range for adjusting 23 the cutting devices in the waiting state and when the material web is at a standstill;

[0116] FOX creep speed, further travel of the material web from the format change position to the separating device for separation

[0117] E5 Separation of finished roll set E at standstill, analogous to D5;

[0118] E6 Ejection of finished roll set E when stationary; analogous to D6;

[0119] F1 Threading at standstill finished roll set F, analog E1 ;

[0120] F2 Acceleration of finished roll set F, analogue to E2; F3 Production speed of finished roll set F, analogue to E3;

[0121] The time range required for a set change tE or a combined set and format change tF, tF*, tF** relevant for the winding process is usually determined from the time of leaving the production speed D3, E3, F3 of the previous set until reaching the production speed D3, E3, F3 of the new finished roll set.

[0122] Figure 5b shows a possible embodiment of an optimized, exemplary, and schematic chronological sequence of the process steps based on Figure 5a. The reference symbols and explanations of Figure 5a continue to apply.

[0123] As shown in Figure 5b, the following process steps are newly introduced or modified so that the required combined set and format change time range tF* can be reduced compared to the state of the art tF from Figure 5a, while the time range for the set change tE remains constant:

[0124] FOS* Format change time range with a moving material web with cutting devices in the cutting state, adjustment 231, 232, 235, 236 of the cutting devices in the cutting state and at a speed of the material web of greater than 10 m / min;

[0125] Separating the material web across the running direction, completing the finished roll set E;

[0126] FOW* optimized format change time range at standstill, format change, adjustment 23 of the cutting devices in the waiting state;

[0127] Figure 5c shows a further optimized, exemplary, and schematic temporal sequence of the operating states analogous to Figure 5a or Figure 5b. The reference symbols and explanations of Figures 5a and 5b still apply.

[0128] As shown in Figure 5c, the following process steps are further modified so that the required combined set and format change time range tF** is further reduced compared to the state of the art and the curve shown in Figure 5b:

[0129] FOW** Format change time range is carried out parallel to process step D6 / E1 during the previous set change when the material web is at a standstill, adjustment 233, 234 of the cutting devices in the waiting state and when at a standstill;

[0130] FOW*** Format change time range is carried out parallel to the process steps E2, E3, E4 before the combined set and format change, adjustment 233 of the cutting devices in the waiting state and with the material web moving;

[0131] For Figures 5a to 5c, the required time range for a combined set and format change F is shortened by optimizing the format change sequence with the corresponding adjustments of the cutting devices. The time range tF** (Fig. 5c) will be shorter than the time range tF* (Fig. 5b), and the time range tF* will be shorter than the time range tF (Fig. 5a).

[0132] Throughout the entire process, the timing of the format change 13, the adjustments 231 to 236 of the cutting devices, and the separation process transverse to the running direction L of the material web 3 are coordinated and controlled at all times with the existing dimensions and configuration of the roll cutting machine 1 in such a way that the separation transverse to the running direction L of the material web 3 can take place later than the format change. The described adjustments 231 to 236 of the cutting devices, the format change position 13, and the separation transverse to the running direction L coincide at exactly the same position in the material web 3, which corresponds to the format change position 13 in the figures. Control is carried out via the control unit 21 of the roll cutting machine 1.

[0133] List of reference symbols

[0134] 1 roll cutting machine

[0135] 2 longitudinal cutting device

[0136] 2.1 , 2.2, 2.3, 2.4, 2.5 Cutting device in cutting state

[0137] 2.n Cutting device in standby mode

[0138] 3 Material web

[0139] 5 Lower knife device

[0140] 6 Upper knife device

[0141] 7, 8 sleds

[0142] 9, 10 knife traverse

[0143] 11 , 12 knife holder

[0144] 13 Format change, time range and / or position; position of the separation across the running direction

[0145] 13.1 Material path area before format change

[0146] 13.2 Material path area after the form at change

[0147] 14 upper blade, plunging blade

[0148] 15 lower blades, counter blades, pot blades

[0149] 16 verge strips

[0150] 16.1 , 16.2 Margin strip first format

[0151] 16.3, 16.4 Margin strip second format

[0152] 17, 18 Adjusting device

[0153] 21 Control unit

[0154] 22 Imaginary cutting plane of the cutting devices

[0155] 23 Adjustment of a cutter device in standby mode during a format change (Prior Art)

[0156] 232, 235 Adjustment of a cutter device in the cutting state in the upstream material web area 13.1

[0157] 231 , 236 Adjustment of a cutter device in the cutting state in the downstream material web area 13.2

[0158] 233 Adjustment of a cutter device in the waiting state before the format change

[0159] 234 Adjustment with transfer of a cutting device in the waiting state during the previous set change E 24 Discharge device

[0160] 25 Guide roller

[0161] 31 Length of material track area in running direction

[0162] 33, 34 Material web area on outer material web layers

[0163] 35, 36 Material railway area on inner material railway layers

[0164] D previous finished roll set, set change

[0165] E previous finished roll set, set change

[0166] F combined set and format change, finished roll set

[0167] L Direction of travel (arrow) t Time tE Time range of set change E tF Time range of combined set and format change F tF* Time range variant 1 tF** Time range variant 2

[0168] I, II, III, IV partial web before a format change

[0169] V, VI, VII, HX, IX, X partial web after a format change

[0170] S1, S2, S3, S4, S5 cutting line, cutting position before format change

[0171] S6, S7, S8,

[0172] S9, S10, S11 cutting line, cutting position after format change

[0173] S20, S30 Alternative variant of a cutting line, cutting position v speed of the material web

Claims

Patent claims 1. Method for positioning cutting devices for time-optimized set and format changes during longitudinal slitting and winding of a running material web (3), in particular a paper or cardboard web, in a roll slitting machine (1) to several finished rolls formed from individual layers of material web, by means of a longitudinal slitting device (2) which has at least three cutting devices (2.1, 2.2, 2.3, 2.4, 2.5, 2.n) comprises, and wherein at least one cutting device is in a cutting state at a first cutting position (S1, S2, S3, S4, S5) and produces a longitudinal cut in a first format before a format change position (13), and at least one cutting device (2.n) is in a waiting state, and wherein at least one preceding set change (E) of the finished rolls is performed, and wherein, during a subsequent combined set and format change (F), a second, new format is set, and the at least one cutting device produces a new longitudinal cut at a second, new cutting position (S6, S7, S8, S9, S10, S11), and wherein an adjustment (231, 232, 233, 234, 235) of at least one cutting device (2.1, 2.2, 2.3, 2.4, 2.5, 2.n) transverse to a running direction (L) of the material web (3) is carried out in a time-controlled manner before and / or after reaching the format change position (13), and is coordinated with a separation of the material web (3) transverse to the running direction (L) such that a separation position corresponds to the format change position (13) of the material web (3).

2. Method according to claim 1, characterized in that an adjustment (233) of the at least one cutting device is carried out in the standby state such that a1) the at least one cutting device (2.n) is adjusted in the standby state before the combined set and format change (F) and is positioned in a second, new cutting position (S8, S30); and a2) the at least one cutting device (2.n) is controlled in the cutting state during the combined set and format change (F) at the format change position (13).

3. Method according to claim 2, characterized in that the adjustment (233) of the at least one cutting device (2.n) is carried out in the waiting state, before the combined set and format change (F) with a material web (3) moving at a speed, preferably with a material web (3) moving at production speed.

4. Method according to claim 2 or 3, characterized in that an adjustment (234) of at least one first cutting device (2.4), which is in a cutting state at a first cutting position (S4), and of at least one second cutting device (2.n), which is in a waiting state, is carried out such that b1) the at least one first cutting device (2.4), which is in a cutting state, is brought into a waiting state during the preceding set change (E) and interrupts a longitudinal cut at a first cutting position (S4); b2) the at least one first cutting device (2.4) in the waiting state is adjusted and positioned in a second, new cutting position (S10); b3) the at least one second cutting device (2.n) in the waiting state is adjusted during the preceding set change (E) and positioned in the first cutting position (S4) of the first cutting device (2.4) is positioned; b4) the at least one second cutting device (2.n) in the waiting state during the preceding set change (E) is brought into cutting state so that the old longitudinal cut (S4) is continued; b5) the at least one first cutting device (2.4) in the waiting state in the second, new cutting position (S10) during the combined set and. Format change (F) at the format change position (13) is brought into a cutting state.

5. Method according to claim 4 characterized in that b6) the at least one second cutting device (2.n) is brought into a waiting state at the format change position during the combined set and format change (F) in the cutting state.

6. Method according to claim 4 or 5, characterized in that the adjustment (234) of the at least first cutting devices (2.4) in the standby state and of the at least second cutting device (2.n) in the standby state is carried out during a previous set change (E) when the material web (3) is at a standstill.

7. Method according to one of claims 4 to 6, characterized in that the adjustment (231 , 232, 235, 236) of at least a second cutting device (2.1 , 2.4, 2.5), which is in a cutting state at a first cutting position (S1 , S4, S5), is carried out such that c1) the at least second cutting device (2.1 , 2.4, 2.5) in the cutting state during the combined set and format change (F) with a material web (3) moving at a certain speed, preferably directly before or after a format change position (13), is adjusted so that a new cutting line is created in a material web area (13.1 , 13.2), which runs in the material web and deviates from the direction of travel (L) to transversely to the direction of travel (L).

8. Method according to claim 7, characterized in that the adjustment (231, 232, 235, 236) of the at least second cutting device (2.1, 2.4, 2.5) in the cutting state during the combined set and Format change (F), with an adjustment speed (231, 232, 235, 236) transverse to the direction of travel (L) of the material web (3) of less than or equal to 100%, in particular less than or equal to 56%, and more preferably substantially 56%, of the speed of the material web (3). Method according to claim 7 or 8, characterized in that the adjustment (231, 232, 235, 236) of the at least one cutting device (2.1, 2.2, 2.3, 2.4, 2.5) is carried out in the cutting state, during the combined set and format change (F), and with a material web (3) moving at a certain speed. Method according to any one of claims 7 to 9, characterized in that a material web area upstream of the format change position (13) (13.1) is wound onto a preceding set of finished rolls (E). Method according to one of claims 7 to 9, characterized in that a material web area downstream of the format change position (13) (13.2) is wound onto a new set of finished rolls (F). A method according to any of the preceding claims, characterized in that all cutting devices (2.1, 2.2, 2.3, 2.4, 2.5, 2.n) cut the material web (3) in a single longitudinal cutting device (2), in particular in the same imaginary plane (22). A method according to any of the preceding claims, characterized in that at least one, preferably two, cutting devices (2.1, 2.5) arranged at the edge of the longitudinal cutting device (2) cut at least one edge strip (16.1, 16.2, 16.3, 16.4). Method according to one of the preceding claims, characterized in that the adjustment (231 , 232, 233, 235, 236) of the at least one cutting device (2.1 , 2.2, 2.3, 2.4, 2.5, 2.n) is carried out in the cutting state and / or waiting state, at a speed greater than 10 m / min, in particular greater than 40 m / min, in particular preferably greater than 80 m / min, of the material web (3).

Images