Method for changing rolls in a machine for winding and wrapping a web of material and such a machine

Abstract

The invention relates to a method for changing finished rolls in a machine (1) for winding and rewinding a material web (M) and / or material sub-webs (MT), preferably a paper web. The machine (1) winds the material web (M) or the material sub-webs (MT) onto a winding core (44) to form at least one finished roll (40) at a constant web speed of more than 1600 m / min. First, a first adhesive (13.1) and a second adhesive (13.2) are applied to a transfer element (11) that can be moved against the material web (M) or the material sub-webs (MT), and then the transfer element (11) is moved against the material web (M) or the material sub-webs (MT) and the two adhesives (13.1, 13.2) are transferred to the material web (M) running in the direction of travel (L) for bonding a new web start to the winding sleeve (44) and / or a web end to a full finishing roll (40.2) before the first carrying drum (41) is reached.At an activation point, a transfer process is carried out between the transfer element (11) and the material web (M) or material sub-webs (MT) while the material web (M) or material sub-webs (MT) are running. According to the invention, during the finishing roll change, the activation point of the transfer element (11) is carried out during the deceleration process from the normal and essentially constant web speed with a deceleration value, preferably constant, of greater than 0.20 m / s².

Description

[0001] The invention relates to a method for changing finished rolls in a machine, preferably a roll slitting machine, for winding and rewinding a web of material and / or partial webs of material, preferably a paper web, a cardboard web, or a tissue web, wherein the machine comprises an unwinding unit, preferably a longitudinal slitting device, a transfer element, and a winding unit. The unwinding unit unwinds the web of material from a parent roll wound on a core, and the winding unit winds the web of material or the partial webs of material onto at least one core to form at least one finished roll. The parent roll is driveable, and at least one finished roll is supported and driven by at least one support drum.

[0002] The invention is explained below in connection with the treatment of a paper web. However, it is also applicable to other material webs that are handled similarly. These include, but are not limited to, fibrous webs made of paper, cardboard, corrugated board, or tissue.

[0003] Paper webs are produced in relatively large widths of up to over 11 meters in a paper machine. Production is virtually continuous. The direction of travel of the paper machine defines the longitudinal direction for all machines and equipment in the paper mill, and the transverse direction is defined perpendicular to it in the horizontal plane.

[0004] At the end of the paper machine, the produced paper web is wound in its full width onto a core, known as the reel. This core is replaced cyclically during ongoing production. The resulting web-wide reel is commonly called a master reel or full reel and, depending on the paper grade, can hold several hours' worth of paper machine production. This master reel can reach a very high weight, from several dozen tons up to a maximum of 150 tons per reel. Handling such a heavy master reel presents a particular challenge for the equipment used.

[0005] To be manageable for a later user, such as a printing company or a converter, the paper web wound on a master roll must be cut into several parallel sections, the widths of which are suitable for the respective end user. These widths can vary considerably, so the division of the paper web is usually carried out according to a custom-defined cutting pattern.

[0006] The individual webs are then wound into smaller finished rolls compared to the parent roll, and these are output together as a so-called finished roll batch. The cutting pattern can be changed from one finished roll batch to the next. The slitting and winding are conveniently carried out in a single machine, which is then often referred to as a roll slitting machine.

[0007] All the winding devices described above, i.e., those for producing parent rolls as well as those for producing partial or finished rolls, have in common that the web to be wound to form a winding roll forms a winding gap with at least one winding roller against which it is supported or rests, and which is accordingly referred to as a support or carrying roller or support or carrying drum. These support drum(s), which are in direct contact with the forming winding rolls, thus also represent the directly acting tools by means of which the winding quality and the winding speed can be influenced. The parent roll and / or the winding roll are driven either directly via drive devices that can be connected to the rolls or indirectly via the support drum(s).A higher-level control and regulation device is typically used to control and regulate machines. This device processes a multitude of input variables (actual values) and control variables (setpoint values). For example, many actual values ​​originate from sensors, drive controllers, frequency converters, and so on. Similarly, numerous control variables are fed into the existing drive controllers or the associated frequency converters that control the drives. These control and regulation devices are almost entirely digitalized today. This means that a processing unit handles and processes the data, for example, taking additional parameters into account and / or filtering the data.

[0008] The described winding machine at the end of a paper machine and the roll slitting machine usually differ in their production speeds. The winding machine at the end of a paper machine is linked to the production speed of the paper machine, i.e., it is usually operated below 1600 m / min. For a roll slitting machine, an "off-line" arrangement is very often advantageous; this means that the roll slitting machine can be operated independently and production speeds of well over 2000 m / min up to 3600 m / min can be achieved.

[0009] These significantly higher production speeds in a roll slitting machine place significantly higher demands on the components.

[0010] Document (1) EP 2 295 356 A2 discloses a method and apparatus for changing finished rolls in machines for winding material webs, in particular paper or cardboard webs, onto cores, in which adhesive is applied to the material web to adhere the web start to a new core and / or the web end to a full finished roll, wherein the adhesive is first applied to a transfer element movable against the material web, which has a lower adhesive strength than the material web, and then the transfer element is moved against the material web and transfers the adhesive to it. Document (1) discloses an advantageous implementation of the transfer of the adhesive at a decreasing speed for a time-optimized process during roll changes.

[0011] Document (2) EP 0 744 365 A2 also discloses a method for changing finished rolls in a winding machine, wherein, shortly before the winding roll(s) reach their target diameter, the machine speed is reduced to a constant or gradually decreasing creep speed. The web is then perforated with a separate perforating device to create a weakening point across its width, and adhesive is applied beforehand using a separate adhesive dispenser, with no significant relative speed between the web and the outer surface of the perforating device. After the web has bonded to the finished roll, the roll is ejected, thereby cutting the web at the weakening point.

[0012] In the current state of the art, the finishing roll change is performed in quasi-stationary operating conditions and at web speeds significantly reduced from the normal web speed of up to 3600 m / min (100%), preferably at so-called creep speeds of less than approximately 1% of the normal web speed. A quasi-stationary operating condition is one in which there is no acceleration or deceleration, or a constant web speed. Furthermore, the finishing roll change process is often carried out at very low deceleration values. This enables reliable and precise control of the perforation and adhesive application.

[0013] Up to now, it has been avoided to perform the finished roll change process in a constant deceleration process starting from the operating speed, as practical experience has repeatedly shown that material web breaks occur when the perforating device enters or the transfer element enters the material web. These material web breaks cause significant production losses.

[0014] The object of the invention is to create a method and a machine according to the independent claims, which can further increase the production capacity of the machine and ensure a safer and more reliable finished roll change, free from material web breaks.

[0015] The problem is solved according to the invention by the characterizing part of the independent claims. Further advantageous embodiments of the present invention are found in the dependent claims.

[0016] The inventive method for changing finished rolls is characterized in that the activation time of the transfer process during the deceleration process is carried out from the normal and essentially constant web speed with a deceleration value of greater than 0.20 m / s 2< , in particular greater than 0.5 m / s 2< , preferably greater than 1.0 m / s 2< , and especially preferably greater than 2 m / s 2< .

[0017] In other words, the activation point of the transfer process is carried out in a constant delay process that starts from the operating speed.

[0018] The inventors discovered that the material web breaks are caused by the occurrence of relative velocities between the material web and the transfer element.

[0019] InIn a further development of the method, the actual web speed of the material web or material sub-webs present in the transfer process is directly specified to the drive control of the transfer element as a target value for a movement speed of the transfer element, so that a relative speed to each other is essentially 0 m / min.

[0020] The inventors further discovered that, due to system-related dead time losses and filter times, the relative velocities occurring during a transfer process when the material web and / or material sub-webs are decelerated are always slightly too high than the target value of the velocity arriving at the drive control of the transfer element.

[0021] Typically, the cycle times present in the higher-level control and regulation devices of the machine, which occur for processing signals and also filter times that are applied to the measurement signals of the first support roller, are unavoidable.

[0022] In In an alternative embodiment, the method is characterized in that, during the transfer process of the applied adhesives from the transfer element to the material web or material sub-webs, the actual web speed, preferably the actual circumferential speed, of the first support roller is transmitted as a target value specification for the movement speed of the transfer element.

[0023] In In an alternative embodiment, the method is characterized in that the actual path speed is specified by a direct, preferably analog or digital, real-time connection of the drive controls of the transfer element.

[0024] Advantageously, this allows the dead times of the control programs present in the higher-level control and regulation devices of the machine, which are required for processing signals, as well as filter times applied to measurement signals between 1ms and 50ms, to be bypassed by a direct, preferably analog or digital, real-time control connection of the drive control of the transfer element.

[0025] In In an alternative embodiment, the method is characterized in that the direct, preferably analog or digital, real-time control connection transmits an existing actual circumferential speed of the first support roller as the target circumferential speed of the transfer element to the drive control of the transfer element essentially without a time offset.

[0026] Advantageously, this allows the target circumferential speed of the transfer element and the actual circumferential speed of the first support roller to be essentially the same. This advantageously enables a clean transfer of the cut point onto the material web.

[0027] In In an alternative embodiment, the method is characterized in that the new activation time is carried out when the actual path speed is greater than 40 m / min, in particular greater than 55 m / min, preferably greater than 70 m / min.

[0028] InIn an alternative embodiment, the method is characterized by the fact that the activation time of the transfer process is automatically determined directly in a control device, depending on the positioning distance and a braking distance until the material web or material sub-webs come to a standstill, and deviations between the positioning and braking distances are compensated for. Advantageously, the calculation for this method can be performed in the higher-level control device.

[0029] In an alternative embodiment, the method is characterized by the fact that the activation point of the transfer process is automatically determined directly in a drive control unit of the transfer element, depending on the positioning distance and a braking distance until the material web or material sub-webs come to a standstill, and deviations between the positioning and braking distances are compensated for. Advantageously, the calculation for this method can be performed in the drive control unit of the transfer element.

[0030] According to the invention, the machine is characterized in that the drive control of the transfer element and the drive control of the first support drum can be connected by a direct, preferably analog, real-time control connection, such that an existing actual web speed, preferably an actual circumferential speed of the first support drum, is specified as a target value for a movement speed of the transfer element, preferably as a target circumferential speed of the transfer element.

[0031] The invention expressly extends to embodiments which are not given by combinations of features from explicit cross-references of the claims, whereby the disclosed features of the invention can be combined with each other - insofar as this is technically meaningful.

[0032] Corresponding elements of the embodiments shown in the figures are identified by the same reference numerals. The functions of such elements in the individual figures are identical unless otherwise described and provided this does not lead to contradictions. Therefore, a repeated description is omitted.

[0033] It should also be noted that the differing features of the illustrated embodiments can be interchanged and combined. The invention is therefore not limited to the combinations of features shown in the illustrated embodiments.

[0034] Further features and advantages of the invention will become apparent from the following description of preferred embodiments with reference to the drawings.

[0035] The invention will be explained below with reference to the following figures. Figure 1shows a side view of a roll cutting machine with a gluing and cutting device 10; Figure 2 shows a simplified velocity-time diagram compared to the state of the art; Figure 3a to 3e The illustrations show the adhesive and separating device 10 in different operating states.

[0036] The figures are shown in a common coordinate system, where MD is the machine direction or the main direction of movement of the material web, CD is the transverse direction of the material web or the machine, and z is the third axis or height direction in a right-handed coordinate system.

[0037] The Figure 1Figure 1 shows a schematic and simplified representation of a machine 1 for winding and rewinding a material web M or several material webs MT. The material web M is unwound from a master roll 20 or a solid drum 20 by an unwinding device 2 or unwinding unit 2. The material web M is wound in several layers onto a core 22 and thus forms the master roll 20. During unwinding, the diameter of the master roll 20 decreases successively until the unwinding or production must be stopped and the unwound master roll 20 is replaced by a new, solid master roll 20 and / or the wound-up, at least one finished roll 40 in the winding unit 4 has been completely wound and is replaced by a new core 44.

[0038] A normal, simplified unwinding procedure consists of changing the mother roll 20 (mother roll change) and / or the finishing roll(s) 40, 40.1, 40.2 (finishing roll change) while the machine 1 is at a standstill, joining and / or separating the material web M or material sub-webs MT, accelerating to production speed vnor, unwinding at production speed vnor and braking or decelerating to a standstill to ensure a change of the finishing rolls 40 and / or a change of the mother roll 20.

[0039] Operating conditions with high deceleration values, in particular, pose a challenge for the entire device due to the high masses involved. However, rapid acceleration and deceleration are desirable, as this offers significant potential for productivity gains. The goal is to accelerate or decelerate weights of up to 150 tons to speeds of up to 3600 m / min within less than 30 seconds (~2 m / s²), preferably less than 15 seconds (~4 m / s²). This requires a special design of the equipment used, especially the control and regulation devices and drive controls.

[0040] The mother roll 20 with winding core 22 is interchangeably and slidably mounted in the unwinding 2. The winding core 22 can be connected to the drive device 24 enclosed in the unwinding 2, which is suitable for driving the winding core 22 and the mother roll 20.

[0041] The material web M or the material sub-webs MT The material web M moves in a direction L which is indicated by directional arrows. Coming from the parent roller 20, it is guided and deflected over at least one, preferably several, deflecting or guide rollers 5.

[0042] Preferably, the material web M coming from the parent roll 20 is cut into at least two, three or more material sub-webs in a longitudinal cutting device 3. MT cut and continued.

[0043] The material web M or the material sub-webs can be listed below. MT guided over at least one spreading device 6 to widen the at least one cut of the longitudinal cutting device 3 in order to cut the material webs MT better to wind onto the individual winding sleeves 44 lying next to each other in the machine transverse direction CD.

[0044] The material web M or material subwebs MT are guided to and over a first support drum 41 and wound onto at least one winding core 44 to form at least one finished roll 40. The finished roll 40 is supported and driven by the first support drum 41 and a second support drum 42, forming a first winding gap 46.

[0045] Alternatively, in an embodiment not shown, the finishing roll 40 can also be driven by only one, first support drum 41, in this case it can be a so-called central drum 41.

[0046] Furthermore, a gluing and cutting device 10 is arranged in front of or within the winding unit 4 in the track of the material web M or material sub-webs MT. In particular, the gluing and cutting device 10 is arranged after the spreading device 6 and in front of or on the first support drum 41 or the so-called central drum 41.

[0047] A finished roll 40 develops through the winding process with a steadily increasing diameter, starting from a new winding core 44, via a partially wound finished roll 40.1 to a full or finished finished roll 40.2 (shown as a dashed line).

[0048] Once a finished roll 40 is fully wound, a first adhesive 13.1, running transversely to the direction of travel or in the transverse direction CD, is applied to the material web M or the material sub-webs MT. Viewed in the direction of travel, following this first adhesive 13.1, a cut or perforation is made by the cutting or perforating agent 14, which separates or weakens the web. Subsequently, a second adhesive 13.2, also running transversely to the material web M or the material sub-webs MT, is applied. In summary, a separation point 15 is formed by the two adhesives 13.1, 13.2 and / or the cut and perforation.

[0049] When the cutting point 15 has then covered a positioning distance PS from its order point 16 at the transfer element 11 onto the material web M or the material sub-webs MT up to the first winding gap 46, the incoming material web M or the material sub-webs MT (e.g. by braking the parent roll 20) is abruptly slowed down and thereby cut at the weakening zone.

[0050] The first adhesive 13.1 in the direction of travel serves to bond the resulting web end of the material web M or material sub-webs MT to the last layer of the finished roll 40.2, and the second adhesive 13.2 (viewed in the direction of travel L) serves to bond the new web beginning of the now following material web M or material sub-webs MT to a new winding sleeve 44.

[0051] The gluing and separating device 10 comprises a movable, preferably rotatable and driveable, transfer element 11, in particular an eccentric roller, which can be brought into engagement with the material web M or the material sub-webs MT. Advantageously, the transfer element 11 is only brought into contact with the material web M or the material sub-webs MT during the activation of the gluing and separating device 10.

[0052] The transfer element 11 comprises a cutting or perforating means 14 on its circumference, in particular one or more knives extending in the transverse direction of CD, preferably one or more serrated perforation knives.

[0053] The cutting or perforating means 14 can also be designed to be recessed.

[0054] The adhesive and separating device 10 further comprises a supporting support element 12 arranged opposite the transfer element 11 and the material web M or the material sub-webs MT, preferably the support element 12 is a rubberized, rotatable eccentric support roller which has a cross-section congruent with the transfer element 11, wherein the support element 12 and the transfer element 11 are coupled in such a way that a drive can drive both elements simultaneously and bring both into engagement synchronously with the material web M and / or the material sub-webs MT.

[0055] The support element 12 and the transfer element 11 are only engaged or in contact with the material web M or the material sub-webs MT during the transfer process of the adhesives and / or the perforation; during the rest of the operation of the machine 1, the support element 12 and the transfer element 11 are not in contact with the material web M or the material sub-webs MT.

[0056] The adhesive and separating device 10 further comprises an adhesive application element 13, which is arranged on the circumferential surface of the transfer element 11. The adhesive application element 13 can apply a first adhesive 13.1 and a second adhesive 13.2, preferably simultaneously, to the circumference of the transfer element 11 in the transverse direction CD. The adhesive can be, for example, a glue or an adhesive tape.

[0057] The first adhesive 13.1 is applied in the direction of travel L of the material web M or the material sub-webs. MT The first adhesive is applied before the cutting or perforating element 14, and the second adhesive 13.2 is applied after the cutting or perforating element 14.

[0058] Furthermore, a higher-level, in particular digital, control and regulating device 90 of the machine 1 is shown. In simplified terms, a control and regulating connection from the higher-level control and regulating device 90 to a drive control 91 of the transfer element 11 and further to the drive of the transfer element 11, as well as to a drive control 92 of the first support roller 41 and further to the drive of the first support roller 41, are shown with dashed lines.

[0059] Furthermore, a direct, preferably analog, real-time control connection 98 is provided from the drive control 92 of the first support roller 41 to the drive control 91 of the transfer element 11. This real-time control connection 98 makes it possible to specify an existing actual web speed v, preferably an actual circumferential speed of the first support drum 41, as a target value for a movement speed of the transfer element 11, preferably as a target circumferential speed of the transfer element 11.

[0060] The Figure 2 Figure 1 shows a simplified velocity-time diagram (vt diagram) of the operation of a machine 1 for winding and rewinding, for example, a roll slitting machine. The velocity is the speed of travel in the direction L of the material web M or the material sub-webs. MT in machine 1.

[0061] The speed v shown is dimensionless on the y-axis and is relative to the maximum web speed v in front of the corresponding machine 1. The time t represents the winding and rewinding of a finished roll 40 from a new winding core 44, over a freshly wound finished roll 40.1, to a finished roll 40.2. Until shortly before reaching the finished roll 40.2 at the time A shown, a deceleration process is initiated in the machine with a negative acceleration or deceleration value. This is typically controlled and regulated, as shown in the solid line, to a so-called constant creep speed until a time B before the machine comes to a standstill.

[0062] Alternatively, once the reduced, constant creep speed is reached, a reduced deceleration phase (long dashed line), particularly one less than 0.20 m / s², can typically be initiated until the vehicle comes to a standstill. Both alternatives are marked with Prior Art.

[0063] Simultaneously or shortly after reaching time B, at time C, the activation time C, the adhesive and separating device 10 is activated and, as already explained, transfers the first adhesive 13.1, the perforation line through the cutting element 14, and the second adhesive 13.2 onto and into the material web M or the material sub-webs MT. Once this has occurred, for example at or shortly before reaching the time D shown, a further deceleration process is initiated, which decelerates the machine 1 from creep speed to standstill at v = 0 m / min, represented as time E.

[0064] This commonly used method allows for a simple design of the control device 90 and can be precisely determined and controlled by the constant speed or the low delay values ​​when activating the transfer element 11 without complex consideration of the varying inertial masses of the moving components.

[0065] In the embodiment of the machine 1 according to the invention, a new, optimized time profile E4 of the deceleration process from web speed vnor from time A until the new standstill at time E' is shown, as in the short dashed line. The activation of the transfer element 11 or the adhesive and separating device 10 ( Figure 3a, 3b, 3c ) now takes place in the first delay process at maximum delay at time C'.

[0066] This requires consideration of the exact masses of inertia, the distance or lengths to be covered, such as positioning distance and braking distance, the material web M or the material sub-webs MT from the gluing and cutting device 10 to the transfer of the adhesive strips 13.1 and 13.2 onto the finished wound roll 40.2 ( Figure 3d ) and onto the new winding sleeve 44 ( Figure 3e ) must be taken into account in the control and regulating device. Even the smallest deviations lead to incorrect transfer of the adhesive strips and separation of the material web M or the material sub-webs MT.

[0067] The embodiment according to the invention makes it possible to shorten or optimize the time required from time A, the start of the deceleration from web speed, to time E, the standstill, so that a new, shortened, optimized time profile from time A to E' is established. The shortened time profile of AE' is shorter compared to the time profile of AE (prior type) of up to 30 s, in particular 20 s, preferably 15 s.

[0068] The Figure 3a to 3e Figure 10 shows the gluing and cutting device in different operating states. A section of the material web M or the material sub-webs MT is shown, which moves in the direction of travel L at a speed v or a maximum vnor.

[0069] The adhesive and cutting device 10 comprises a rotatable and driveable transfer element 11, a rotatable and driveable support element 12, and an adhesive application element 13. A cutting or perforating element 14 is fixedly or retractably arranged on the circumference of the transfer element 11. Retractable means that the cutting or perforating element 14 can be retracted within the circumference of the transfer element 11, such that the cutting or perforating element 14 cannot create a cutting edge or perforation line in the material web M or the material webs MT, even when the transfer element 11 is in contact with the material web M or the material webs MT.

[0070] The Figure 3aFigure 1 shows a first preparation state of the adhesive and separating device 10, in which the transfer element 11 and also the support element 12 are movable in the MD-z plane and positioned in such a way that both elements 11, 12 are in contact with the material web M or the material sub-webs MT.

[0071] The transfer element 11 is positioned in its rotational position such that the cutting element 14 and the adhesive application element 13 are congruent to each other. This means that the first adhesive strip 13.1 is applied to the transfer element 11 exactly in front of the cutting element 14 in the transverse direction of CD, and the second adhesive strip 13.2 is applied exactly after the cutting element 14 in the transverse direction of CD.

[0072] In Figure 3bAfter the adhesive has been applied by the adhesive application element 13, the transfer element 11 is positioned in its rotational position in a starting position, shortly before engaging the material web M or the material sub-webs MT. In particular, the support element 12 is positioned in contact with the material web M or the material sub-webs MT and rotates at the material web speed, either passively or actively driven.

[0073] The transfer element 11 is still without contact with the material web M or the material sub-webs MT. In an alternative embodiment, the transfer element 11 can be positioned further closer to the material web M or the material sub-webs MT in the MD-z plane.

[0074] From the position shown in Figure 3bThe adhesive and separating device 10 can be activated, which then rotates a maximum of 180° in the direction of travel L of the material web M or the material sub-webs MT, thus briefly engaging or contacting the material web M or the material sub-webs MT. The first adhesive 13.1 is transferred from the transfer element 11 to the material web M or the material sub-webs MT. Subsequently, the cutting element 14 perforates in the transverse direction CD, weakening the material web M or the material sub-webs MT for later separation. Following this, the second adhesive 13.2 is transferred to the material web M or the material sub-webs MT. In summary, these three steps create a separation point 15 in the material web M or the material sub-webs MT.

[0075] The end of the described process is in Figure 3cThe illustration shows the gluing and cutting device 10 in an end position and ready for the process to restart. Also shown is the separation point 15 created by the gluing and cutting device 10 in the material web M or material sub-webs MT, which have already traveled a certain distance in the direction of travel L.

[0076] Finally, the separation point 15 is transported to the winding unit 4. A brief jolt during braking or when the finished roll 40.2 is ejected from the winding unit 4 causes the material web M or the material sub-webs MT to separate automatically at the prepared separation point 15, creating a web end with the positioned first adhesive strip 13.1 and a new web beginning with the positioned second adhesive strip 13.2 of the material web M or the material sub-webs MT.

[0077] Upon reaching winding stage 4, as described in Figure 3dAs shown, the web end of the material web M or the web ends of the material sub-webs MT are glued to the outer layer of the finished finished roll 40.2 or finished rolls 40.2 with the first adhesive strip 13.1.

[0078] Upon reaching winding stage 4, as described in Figure 3e shown, the web start of the material web M or the web starts of the material sub-webs MT are glued to the new winding sleeve 44 with the second adhesive strip 13.1 onto the new winding sleeve 44 or winding sleeves 44. Reference symbol list

[0079] 1 Machine 2 Unwinding 3 Longitudinal cutting device 4 Winding 5 Deflection or guide roller(s) 6 Spreading device 10 Gluing and cutting device 11 Transfer element 12 Support element 13 Adhesive application element 13.1 First adhesive 13.2 Second adhesive 14 Perforating element 15 Cutting point 16 Application point 20 Mother roller 22 Winding core 24 Drive device 40 Finishing roll 40.1 Partially wound finished roll 40.2 Fully wound or fully wound finished roll 41 First support drum 42 Second support drum 44 Winding sleeve 46 First winding gap 90 Control and regulating device of the machine 91 Drive control of the transfer element 92 Drive control of the first support roller 98 Direct real-time control connection A Time - Start of first deceleration from web speed B Time - Start of creep speed, C Activation time (Prior type) D Time - End of creep speed, start of further deceleration E Standstill (Prior type) C'New activation time E'New standstill E4Optimized time profile according to the present method M Material web MT Material sub-webs L Direction of travel Material web t Time v Speed ​​v'New activation speed vk Creep speed vNormal maximum speed during machine operation MD Machine direction CD Cross direction z Vertical direction

Claims

1. A method for changing finished rolls during the winding and rewinding of a material web (M) and / or material sub-webs (MT), preferably a paper web, a cardboard web or a tissue web, in a machine (1), preferably a roll slitting machine (1), wherein the machine (1) winds the material web (M) or the material sub-webs (MT) onto at least one winding core (44) to form at least one finished roll (40) at a normal and substantially constant web speed (vnor) of more than 1600 m / min, in particular more than 2000 m / min, preferably up to 3600 m / min, and wherein the at least one finished roll (40) is driven by a first support drum (41), preferably and by a second support drum (42) and forms a first winding gap (46) with the first support drum (41), and wherein a first adhesive is initially applied to a transfer element (11) movable relative to the material web (M) or the material sub-webs (MT). (13.1) and a second adhesive (13.2) are applied and, the transfer element (11) is subsequently moved against the material web (M) or material sub-webs (MT) and, the first adhesive (13.1) and the second adhesive (13.2) are transferred to the material web (M) or material sub-webs (MT) running in the direction of travel (L) for bonding a new web start to the at least one winding core (44) and / or a web end to at least one full finishing roll (40.2) before the first winding gap (46) is reached and, the applied adhesives (13.1, 13.2) travel a positioning distance (PS) from their application point (16) on the transfer element (11) to the first winding gap (46) and, at an activation time (C), a transfer process is carried out between the transfer element (11) and the running material web (M) or the running material sub-webs (MT). characterized by the fact thatthe activation point (C') of the transfer process during the deceleration process from the normal and essentially constant orbital speed (vnor) with a, preferably constant, deceleration value of greater than 0.20 m / s 2 , especially greater than 0.5 m / s 2 , preferably greater than 1.0 m / s 2 , especially preferred greater than 2.0 m / s 2 , is carried out.

2. Method according to claim 1, characterized by the fact that an actual web speed (v) of the material web (M) or the material sub-webs (MT) present in the transfer process is directly specified to a drive control (91) of the transfer element (11) as a target value specification for a movement speed of the transfer element (11), such that a relative speed to each other is essentially 0 m / min.

3. Method according to claim 1 or 2, characterized by the fact thatan actual orbital speed (v) present in the transfer process is specified by a direct, preferably analog or digital, real-time control connection (98).

4. Method according to claim 3, characterized by the fact that the direct, preferably analog, real-time control connection (98) transmits an existing actual circumferential speed of the first support roller (41) as the target circumferential speed of the transfer element (11) to the drive control (91) of the transfer element (11) essentially without a time offset.

5. Method according to any of the preceding claims, characterized by the fact that The activation time (C') is carried out when the actual path speed (v') is greater than 40 m / min, in particular greater than 55 m / min, preferably greater than 70 m / min.

6. Method according to any one of claims 1 to 5, characterized by the fact thatThe activation time (C') of the transfer process is automatically determined directly in a drive control (90) depending on the positioning distance (PS) and a braking distance until the material web (M) or material sub-webs (MT) come to a standstill, and deviations of the positioning distance to the braking distance are compensated.

7. Method according to any one of claims 1 to 5, characterized by the fact that The activation time (C') of the transfer process is automatically determined directly in a drive control (91) of the transfer element (11) as a function of the positioning distance (PS) and a braking distance until the material web (M) or material sub-webs (MT) come to a standstill, and deviations of the positioning distance to the braking distance are compensated.

8. Machine (1) for winding and rewinding, in particular a roll slitting machine, a material web (M) and / or material partial webs (MT), preferably a paper web, a cardboard web or a tissue web, for carrying out the method according to claim 1, wherein the driveable first support drum (41) comprises a drive control (92) and the driveable transfer element (11) comprises a drive control (91), characterized by the fact that the drive control (91) of the transfer element (11) and the drive control (92) of the first support drum (41) can be connected by a direct, preferably analog or digital, real-time control connection (98) such that an existing actual web speed (v), preferably an actual circumferential speed of the first support drum (41), is specified as a target value for a movement speed of the transfer element (11), preferably as a target circumferential speed of the transfer element (11).

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