Station for rotary transverse cutting of material and method

Abstract

The present application relates to a station for rotary transverse cutting 5 of a material and a method. The present invention presents a station for rotary transverse cutting of a material, comprising a housing, sheeting cylinders with knives, rollers, characterized in that an upper sheeting cylinder (6) and a lower sheeting cylinder (7) arranged in the housing possess undercuts (19) as well as channels (12) for at least one pair of blades –for an upper knife (8) and a lower knife (9), wherein the upper sheeting cylinder (6) and the lower sheeting cylinder (7) are driven from a "drive" section (10), wherein at a certain stage, the upper knife (8) and the lower knife 9 arranged on the upper sheeting cylinder (6) and the lower sheeting cylinder (7) imitate an approximate vertical cutting movement.

Description

[0001] Station for rotary transverse cutting of material and method

[0002] The subject of the present invention is a station for rotary transverse cutting of a material and a method for cutting, in the field of devices for transverse cutting of a web of active materials in the accumulator-manufacturing industry, where in effect, production of electrode sheets is attained in the accumulator-manufacturing machines. A station of this kind is utilized before the process of stacking the cells. The device can also be utilized in the printing industry and every industry requiring the processing of a web and web sheets.

[0003] Currently, the most popular method in producing electrode sheets is cutting by virtue of a flat guillotine. A similar cutting system has been disclosed in the document KR101933550B1 System for Manufacturing Cell Stack of Secondary Battery which relates to a machine assisting in the manufacturing of batteries. It has different portions which work together to cut and mount the elements of the batteries. There exists a positive electrodefeeding portion in which the positive electrode film is wound and mounted. There also exists an anode-cutting portion which cuts the cathode film to a specific size. The machine has a tilting table which may rotate in both directions, and an electrode stack unit which drives the table. A separator supply unit continuously delivers the separator material. The machine also has a cathode transfer unit which conveys the cut cathode plates to the tilting table. An anode cut unit has a cutting platform and various adsorption bars for holding and cutting the cathode film in order to attain an efficient and precise manufacturing of batteries.

[0004] A system is known from the document WO2022255651 which automates the process of notching electrodes and stacking cells in secondary batteries. This system connects a notching portion to notch the lead tabs at the edges of the electrodes, and a cell-laying portion to lay the negative electrode plate, the positive electrode plate and the separator in an appropriate order to form the cell stack. The efficiency and accuracy of the process of manufacturing secondary batteries are thereby enhanced by streamlining the steps of notching and laying.

[0005] A device is known from the document WO2012074214 which cuts electrode sheets to form multi-element electrode bodies. It includes a cutter which cuts the electrode sheet when it is attached in place, and a plurality of grippers which receive and convey the electrode sheet one body at a time. This device enhances the efficiency and precision of the process of cutting, enabling mass manufacturing of multi-element electrode bodies used in various applications, such as batteries or electronic devices.

[0006] A device is disclosed in the document KR102638743 which cuts electrode sheets. The assembly consists of stacked electrode sheets with a separator therebetween. The device has a pair of cutting elements which simultaneously cut the electrode tabs. It also has a drive unit which moves the cutting elements up and down. The cutting elements are set at an angle to the surface of the assembly and have a guiding portion for attaching and cutting the tabs. The device is part of a module which includes a loading area, a cutting area, a first welding area for one tab, a second welding area for a second tab, and an unloading area. The module also has a turntable which rotates and attaches the assembly for cutting.

[0007] An invention is disclosed in the document KR20210103719 which relates to a device for cutting electrodes, for an accumulator, serving to continuously notch and cut a transported electrode sheet, which device includes: at least one transport unit which transports the delivered electrode sheet while simultaneously exerting pressure thereon in order to notch and cut it, a notching unit including a first roll and a second roll arranged over and under the electrode sheet, arranged next to the transport unit which continuously notches the transported electrode sheet while simultaneously producing leads at both widths of the electrode sheet, and a slitting unit which is arranged on one side of the transport unit and produces a notched electrode sheet with the produced lead, in the form of single electrode.

[0008] A device is disclosed in the document KR102507080 for high-speed cutting. The device for high-speed cutting, for a secondary battery, in accordance with one embodiment of that present invention serves to cut an electrode sheet forming an electrode of the secondary battery by employing an upper blade and a lower blade during the process of conveying. The device for high-speed cutting includes: a roll block coupled to the upper blade and eccentrically rotated in order to draw a circular rotation trajectory in a conveying direction of the electrode sheet on an upper portion of the electrode sheet; a sliding block coupled to the lower blade and sliding in a direction opposite to the conveying direction of the electrode sheet on the lower portion of the electrode sheet; a drive unit eccentrically rotating the roll block in the conveying direction of the electrode sheet; and a substantially vertical guide interlocking the sliding operation of the sliding block with the eccentric rotation operation of the roll block and slidably connecting the roll block and the sliding block in a substantially vertical direction such that the roll block rotates eccentrically while a posture change is prevented.

[0009] The solutions to date presenting the machines for cutting require the use of sophisticated connections of the many elements of the system. The construction thereof is very complex, expensive and time-consuming, with the quality of work and the effects not being satisfactory. With a view to the need to simplify the construction and due to the very sensitive process, the cutting requires very high precision. Other kinds of cutting, such as, e.g., groove or shear cutting, do not yield the appropriate cutting quality. The active layer of the covering is tom off and ends up being cut unevenly. Large impurities are output near the edge of the cut. Moreover, the systems to date working with a start - stop system, large accelerations, reversing or braking of the web are limited due to the inertia of the system and the vibrations of the machine. The object is thus for greater quantities of the electrode sheets to be delivered to the process of stacking This causes the manufacturing of accumulators to be accelerated. Because of the nature of the current devices, it can be observed that in other kinds of cutting, discrepancies exist in the cutting precision relative to the cutting speed. The greater the speed, the more the cutting precision decreases. When requiring a high cutting precision, the cutting blades should be located as close to each other as possible, which causes the blades to wear out quickly. The object of the device is also to facilitate the change of the blades and to achieve the appropriate cutting parameters in as short a time as possible and to reduce the work of the operator. An appropriate approaching and co-working of the blades yield the effect of self-sharpening. The start-stop systems may cause jerking of the web of the fragile material, which causes damage to the active material when increasing the manufacturing speed. In the present solution, the web moves at a stable speed, which protects the fragile coating from excessive shocks / jerking. The technical problems indicated are solved by the present invention by providing an improved and versatile structure devoid of the defects found in the solutions known to date. In order to accommodate these problems found in the prior art solutions, a new structure of the station for transverse cutting has been proposed, and the object of the present invention is to enhance the versatility of use, the efficiency of producing and constructing the structure, to increase the economicality, and at the same time to avoid any and all surface losses by affording an improved structure of the device. The object of the present invention is also to attain a versatile, effective device with high precision, wherein such precision is obtained owing to the shearing cutting which occurs in the guillotine and in the present solution.

[0010] The essence of the present invention is a station for rotary transverse cutting of a material, comprising a housing, sheeting cylinders with knives, rollers, characterized in that an upper sheeting cylinder and a lower sheeting cylinder arranged in the housing possess undercuts as well as channels for at least one pair of blades - for an upper knife and a lower knife, wherein the upper sheeting cylinder and the lower sheeting cylinder are driven from a "drive" section, wherein at a certain stage, the upper knife and the lower knife arranged on the upper sheeting cylinder and the lower sheeting cylinder imitate an approximate vertical cutting movement.

[0011] It is preferable that at the time of cutting, the working elements of the blades - the upper knife and the lower knife - are substantially perpendicular to each other, and the upper knife and the lower knife mesh with each other and perform a collision-free exit.

[0012] It is preferable that the upper sheeting cylinder and the lower sheeting cylinder have separate servo drives - a third servo drive, a fourth servo drive.

[0013] It is preferable that the "drive" section comprises a servo drive of a NIP, a second servo drive of a reception device, the third servo drive of the lower cylinder, the fourth servo drive of the upper cylinder, a fifth drive as a second drive of the reception device.

[0014] It is preferable that it possesses a receiving device at an exit of the station, wherein the receiving device comprises a belt conveyor and / or a belt conveyor and / or a reception site.

[0015] It is preferable that it comprises a lateral adjustment of the upper sheeting cylinder and comprises a lateral adjustment of the blades - the upper knife and the lower knife - by the lateral adjustment of the cylinder and / or the individual adjustments of the each blade - the upper knife and the lower knife - by a mounting system with substantially horizontal mounting holes, with substantially vertical mounting holes and adjustment bolts in the adjustment holes.

[0016] It is preferable that on the other side, the upper cylinder and the lower cylinder possess a cylinder / shaft clutch and the servo drives with a transmission.

[0017] It is preferable that the lower knife comprises an undercut. An arrangement in which the upper knife has an undercut is also possible. One can assemble various knife configurations in which the lower and upper knives are swapped, or where the cuts are made using either the upper or the lower knives.

[0018] It is preferable that the upper sheeting cylinder and the lower sheeting cylinder are slidable in phase with each other through the independent drives - the third servo drive of the lower cylinder, the fourth servo drive of the upper cylinder - which determine the distances between the upper knife and the lower knife for optimizing the cutting quality.

[0019] It is preferable that the upper sheeting cylinder and the lower sheeting cylinder and a material-feeding device are slidable in phase - they have different linear speeds relative to each other through the independent drives, for adjusting the cutting speed and / or length.

[0020] It is preferable that the station possesses encoders arranged on the sheeting cylinders, wherein the encoders simultaneously measure and adapt in a controlled manner the real shaft position of the sheeting cylinder - the upper sheeting cylinder, the lower sheeting cylinder - to the motor shaft position of the servo drive - the third servo drive of the lower cylinder and the fourth servo drive of the upper cylinder.

[0021] It is preferable that the upper sheeting cylinder, the lower sheeting cylinder are coupled together (or engaged) by wheels - a gear wheel of the upper shaft, a counter wheel, a gear wheel of the lower shaft - and driven through the third drive of the cylinder.

[0022] It is preferable that the station is equipped with the encoder.

[0023] It is preferable that the station is equipped with clamps of the cylinders.

[0024] It is preferable that the third drive of the lower cylinder is coupled with the lower cylinder through the clutch.

[0025] It is preferable that the station possesses a feeding device comprising a lower roller and an upper roller with a clamping system.

[0026] The essence is also a method for cutting sheets in the station set out above, characterized in that it comprises the following steps: a) A step of accelerating the cylinders in order to attain a correct length of the sheet and a specific phase slide between the blades. b) Stabilizing the speed of the cylinders to a speed proximate to the speed of the material. c) Tensioning the web in order to precisely perform the cutting-off. d) Meshing of the blades along with a simultaneous cutting off of the sheet, as a result of which the web turns into a sheet, and the blades mesh substantially at a right angle. e) Unmeshing of the blades and feeding of the sheet to a further process, wherein there occurs pushing of the sheet out of the station and preparation is made for cutting off of a subsequent one. f) Returning to the initial step.

[0027] The advantage of the present invention is the elimination of the flat guillotine cutting which had a disadvantage in the form of working in the start-stop cycle of the material, because of which the manufacturing speed was limited; moreover, variable cutting conditions would occur in the known machines. The imposed requirements regarding maintaining the highest cutting quality have been solved through the rotary nature of operation of the present device according to the present invention. Through an assembly of technical features, imitation of the guillotine cutting is in effect attained while maintaining better speed parameters than a flat guillotine with a simultaneous provision of the cutting precision regardless of the manufacturing speed. At the same time, an easy and fully controlled method is provided enabling to change the length of the repetition. Owing to its structure, versatility is provided as one device which can be utilized for various works, and with an optimal utilization of the material, the economicality increases. The solutions of the known prior art present a guillotine flat cutting of the electrodes, where despite the rotational movement, the tool meets the tool vertically. Moreover, the object is first and foremost for no "flat" cutting to take place, but rather for only rotary cutting to take place. The object is for the shape of the knives over a short section to imitate an approximate vertical movement, however, this would be impossible if the knife was fixedly attached to the shaft. The object is to attain a rotary imitation of the flat guillotine.

[0028] The embodiments of the present invention are visualized in the drawings in which:

[0029] - Fig. 1 - shows a section through a central plane of the station in a narrow version, with one reception conveyor,

[0030] - Fig. 2 - shows a side view of the station in the narrow version, with one reception conveyor, - Fig. 3 - shows a rear view of the station, in the narrow version with one reception conveyor,

[0031] - Fig. 4 - shows a front view of the station in the narrow version with one reception conveyor,

[0032] - Fig. 5 - shows a section of a pair of cylinders, coupled together by gear wheels,

[0033] - Figs. 6a and 6b - show an exemplary blade of a lower shaft in a side and longitudinal view,

[0034] - Fig. 7 - shows a diagram of the device and operation thereof,

[0035] - Fig. 8 - shows a close-up of the cylinders, a demonstration of meshing and a mounting of a knife to the cylinder,

[0036] - Fig. 9 - shows an example of a difference in the shape of the blade for the machine,

[0037] - Fig. 10 - shows a process of the meshing of the blade,

[0038] - Fig. 11 - shows a lateral section of the station in a wide version without the reception device,

[0039] - Figs. 12a and 12b - show a rear and side view of the station in the wide version without the reception device,

[0040] - Fig. 13 - shows a sectional view of the station in the wide version, without the reception device,

[0041] - Figs. 14a and 14b - show a sectional view and a rear view of the station in the wide version with the receiving device composed of two conveyors,

[0042] - Figs. 15a and 15b - show a perspective-view view of the station in the wide and narrow versions,

[0043] - Fig. 16 - shows a view of the cylinders with the blades attached in a side view,

[0044] - Figs. 17a, 17b, 17c, 17d - show pairs of knives mounted in cylinders,

[0045] - Fig. 18a - shows the position of the knives "-lOdeg" - angular approach of the knives before cutting, - Fig. 18b - shows the position of the knives with a value of "-5deg" - about -5 degrees, the apices of the knives are set at an angle of about 90 degrees relative to each other and begin to cut the material,

[0046] - Fig. 18c - shows the position of the knives with the value "-3deg" - the meshing of the knives,

[0047] - Fig. 18d - shows the position of the knives with the value "-Ideg" - the next stage of meshing,

[0048] - Fig. 18e - shows the position of the knives with the value "Odeg" - the vertical axis of the knives and grooves in the cylinders is aligned - the moment of the greatest meshing,

[0049] - Fig. 18f - shows the position of the knives with the value " 1 deg" - knives are coming out from the meshing, the closest distance of the upper apex from the body of the lower knife,

[0050] - Fig. 18g - shows the position of the knives with the value "3deg" - the next stage of the knife coming out after cutting off,

[0051] - Fig. 18h - shows the position of the knives with the value "5deg" - the next stage of unmeshing, the moment of unmeshing the knives,

[0052] - Fig. 18i - shows the position of the knives with the value " lOdeg" - the next step of unmeshing,

[0053] - Fig. 19a - shows the cutting cycles for 2 knives, where the pairs of knives are marked as A and A' and B and B',

[0054] - Fig. 19b - shows the cutting cycles for 6 knives, where the pairs of knives are marked as A and A' and B and B'.

[0055] An embodiment of the solution according to the present invention, being a station for rotary transverse cutting of a material as visible in Figs. 1-5 and 7-11, comprises, among others, elements such as: A driven roller 1 - i.e., a lower roller of a NIP, a rubber roller 2 clamped by means of actuators - i.e., an upper roller of the NIP, a clamping system 3 of the rubber roller, a sheet-receiving device 4 - this is, by way of example, driven rubber belts which receive the sheet and owing thereto are pushed out of the station. The term NIPs refers to the so-called NIP rollers. The NIP rollers are a sub-assembly composed of a driven roller (it can be a metal roller that can be smooth for use in delicate materials, such as in the production of battery elements, or it can be knurled to increase friction) and a clamping roller located above the drive roller (it can be made of metal and can be covered with rubber to increase friction), it is used to produce tension / slide the material or laminate the layers. NIPs can be, for example, driven rollers or a material feeding device. The name NIP is derived from English terms NIP rollers / NIP system and by definition it can mean pressure rollers containing drive rollers and rollers freely cooperating with each other in order to exert pressure on the materials passing through them.

[0056] Moreover, in an alternative embodiment, the station may possess an optional clamp system 5 of cylinders. The station also comprises an upper sheeting cylinder 6, a lower sheeting cylinder 7, an upper knife 8, a lower knife 9 and servo drives - a third servo drive 17 of a lower cylinder, a fourth servo drive 18 of an upper cylinder. The machine for cutting may be present in a wide version as well as, in an alternative embodiment, in a narrow version. The width of the station may be adapted depending on the demand. Depending on the length and diameter of the used sheeting cylinders attached in the body, as well as depending on the needs and requirements of the manufacture speeds imposed on the machine by the recipient - the parameters and overall dimensions of the station will change accordingly. Looking from the left to the right, the elements located in the machines according to the embodiments are: on the left, there is the full NIP device at the entry to the station comprising the elements of the driven roller 1 - i.e., the lower roller of the NIP, the, e.g., pneumatically clamped rubber roller 2 - i.e., the upper roller of the NIP, and located here is also the clamping system 3 of the rubber roller. It defines the speed of the machine, and simultaneously creates tension on the machine and feeds the material to a blanking-die station. The NIP -type device - which will be apparent to a person skilled in the art - is a subassembly comprising a driven roller (most often it is a metal roller which is knurled, mol eted to increase friction, although there may also be other, smooth ones) and a clamping roller located above the drive roller (most often made of metal and covered with rubber to increase friction, although there may also be other ones), it serves to produce tension / slide the material or laminate the layers; colloquial names, such as: driven rollers or a materialfeeding device, i.e., nip roller-type driven rolls, are commonly employed.

[0057] The sheet-receiving device 4 is located on the right side of the station (i.e., in a view from the service side of the station), that is, at its exit. The receiving device 4 is the site where the processed material ends up which has been subjected to treatment by the station for cutting. After the cutting, the product may exit to the reception site 4. The reception site 4 in the form of the receiving device 4 may comprise two belt conveyors which grasp the sheet before the cutting-off, imparting strain on the web - tension enabling to stabilize the cut-off fragment and retaining the material being cut. Alternatively, they may have two drives or be coupled together by one drive. There may be one lower belt conveyor which will receive merely the falling sheet - this is illustrated in one embodiment in the narrow version. In one alternative embodiment of the device in the narrow version, Figures 1 - 4, the receiving device 4 is an integral portion of the station, fastened between main plates of the station. A drive of the reception device is attached to the station's main plate. In one further alternative embodiment of the device, Fig. 14a, Fig. 14b - these may be two independent devices added to the base station. The sheet-receiving device 4, like, by way of example, tables, has its separate drives. They may be set such to grasp the sheet before the cutting-off and to create their tension. Another setting option is in such manner that after the cutting-off, the sheet inertly falls on the lower conveyor or to the collection site.

[0058] The station has the upper sheeting cylinder 6, the lower sheeting cylinder 7, the upper knife 8, the lower knife 9, wherein the upper sheeting cylinder 6 and the lower sheeting cylinder 7 have their two separate drives - i.e., the third servo drive 17 of the lower cylinder, the fourth servo drive 18 of the upper cylinder. They do not work synchronously. They synchronize merely with the speed of the paper / material over a short angular section, just before and after the cutting-off of the sheet. The upper knives 8 and the lower knives 9 are attached on the upper sheeting cylinder 6 and the lower sheeting cylinder 7, respectively. The attachment of the knife to the cylinder is implemented through a certain detachable, like, e.g., screw, connection - i.e., through mounting screws 33. The cylinders may accelerate or decelerate between the knives so as to match the length of the sheet. The cylinders may synchronize differently for each pair of the blades. In one alternative version of the embodiments, like, by way of example, for the narrow version, sheeting cylinders may be present: the upper sheeting cylinder 6, the lower sheeting cylinder 7, which are coupled together by wheels (as in Fig. 5) - i.e., they are coupled together by wheels if there is one knife - i.e., by wheels: a gear wheel 26 of the upper shaft, a counter wheel 27, a gear wheel 28 of the lower shaft - as one can see in Fig. 5.

[0059] Moreover, for the structure to meet the stiffness and strength conditions, the entire station, along with the width of the material being processed, must have greater sizes and width, which results from the engineering principles in the art. To provide a small deflection value and maintain the strength conditions, the diameter of the cylinders may be increased. For example, for the narrow station, preferably with an exemplary width of about 300- 400mm, the shafts may be used preferably with diameters of about 60-120mm. For the station in the wider version which may have a width of preferably about 800- 1000mm, the shafts may be preferably used with diameters of 180-350mm. These parameters may be adjusted accordingly without departing from the essence of the present solution.

[0060] The elements of the station visible in Fig. 2 in the side view are, among others: a "drives" section 10, main plates 11 of the station, bars and / or beams - which is an interchangeable element for a person skilled in the art, and elements of a similar kind may be used as connecting elements 13 for the station's main plates. The main plates 11 of the station, forming the body of the machine, must provide high stiffness and strength for the subassemblies embedded therein. The main plate 11 of the station has a sort-of U-shaped slot 29 to enable mounting for the upper sheeting cylinder 6 which may be in a bearing cube placed in a slot 29 of the main plate 11 of the station.

[0061] The visible elements in Fig. 3 in the rear view of the station are, among others, a first servo drive 15 of a NIP, a second servo drive 16 of the reception - receiving device 4, the third servo drive 17 of the lower cylinder, the fourth servo drive 18 of the upper cylinder.

[0062] The visible elements in Fig. 4 in the front view of the station are, among others, a lateral adjustment 14 of the upper sheeting cylinder 6. In one alternative example, in the case of possessing only one pair of the knives, adjustment of the entire upper sheeting cylinder 6 may be used on the station. This adjustment is responsible for setting the knives relative to each other such that the slot therebetween is equal. In an alternative version in which there is a greater quantity of the blades present, threaded holes 39 for substantially vertical -plane adjustment are located in the cylinders, preferably with a fine thread, so as to use a clamping screw which will push out the knife. In this manner, the knives are set between each other in a substantially vertical plane.

[0063] The visible elements of the device according to the alternative embodiments of the station, visible in Fig. 5 illustrating the pairs of the cylinders and the sections thereof, comprise, among others: first pins 21 of the shafts from the drive side, second pins 22 of the shafts from the operator side, the upper shaft - i.e., the upper sheeting cylinder 6, the lower shaft - i.e., the lower sheeting cylinder 7, a cant 25 of the upper shaft. The sheeting cylinders may also be called shafts or cylinders as the same element with a view to the fact that this is a hollow shaft, called a cylinder or a sheeting cylinder. In alternative embodiments, the station may be additionally equipped with the first gear wheel 26 of the upper shaft - the upper sheeting cylinder (optional), the angular clearance-reducing counter wheel 27 (optional), the second gear wheel 28 of the lower shaft (optional).

[0064] In Figs. 6a and 6b, an exemplary blade of the lower shaft is shown which may be one alternative embodiment of the blades, the knife / blade is attached to the cylinder through a detachable connection which must provide a robust hold, like, by way of example, through a screw connection - i.e., through the mounting screws 33, and this aim is served by the respectively made horizontal -plane mounting holes 37 and the vertical -plane mounting holes 38. Especially in one alternative embodiment, the station in the wide version has an exemplary width of preferably about 1000mm and may possess 1 or more pairs of the knives / blades. Preferably, even from 3 to 6 pairs of the knives may be used for the wide station with an exemplary diameter of the cylinder of about 200-250mm. Depending on the speed which we wish to obtain, the required length of the sheet and the width of the machine, we see the parameters such as the diameter of the shafts, the quantity of the blades change. By way of example, the diameter of the sheeting cylinders / shafts - may adopt the parameters for the machine in the narrow version, with an exemplary width of about 300- 400mm - where an exemplary magnitude of the cylinder / shaft may preferably amount to from 60 to 120mm of diameter, which may allow for, by way of example, from 1 to 3 pairs of the knives / blades on the circumference. In other alternative embodiments, there may be fewer blades, wherein then other parameters of the machine may be chosen, like, by way of example, the linear speed of the machine may be reduced according to the dependencies indicated below. The wider machine defines the diameter of the shafts. One may also control this diameter of the shafts depending on the length of the sheets which we wish to achieve. The shorter the sheets, the more preferably smaller the shaft, or the greater the quantity of the knives-blades on the circumference.

[0065] Speed dependencies - they can be, by way of example, illustrated such that for the machines in the narrower version, e.g., with a width of about 300-400, with the shafts with, e.g., about 60-100 of diameter and possessing 1 knife - a speed of 0 to 50m / min may be preferably achieved on the sheets with a length of 100mm, and for the sheet of 150mm, speeds of 0-80m / min may be preferably achieved. Alternatively, when possessing 2 knives - preferably, for a sheet length of 100mm, a speed of 30m / min may be achieved, and for a length of 150mm, lOOm / min may be achieved. From such dependencies, conclusions may be drawn about the appropriate choice of the parameters, which will be possible for a person skilled in the art and will not limit them. The analogous dependencies arise both in the wide and in the narrow machine, where we could exhibit speed dependencies and proportions regarding the sizes of the devices and the parameterization of diameters and speeds resulting therefrom. The choice of the width of the machine and the length of the shafts is a matter of individual adaptation to the demand of the recipients and may be chosen accordingly to the requirements imposed on the machine, which also determinates the proportional design of the further dimensions and parameters of the machine, its diameter of the cylinders, quantity and length of the knives, and the power of the servo motors, which is a subject for the specialists in the art.

[0066] In Fig. 7, diagram of the device is illustrated in which made marking was made of: the driven roller, the lower roller of the NIP 1, the rubber roller clamped by means of actuators, the upper roller of the NIP 2, the sheeting cylinder 6 - the upper shaft, the sheeting cylinder 7 - the lower shaft, the sheet-receiving device 4. The working directions of selected elements are also marked.

[0067] In Figs. 11, 12a, 12b, 13 showing the views and sections of the station, visible are, among others: the driven roller - the lower roller 1 of the NIP; the rubber roller clamped by means of actuators - the upper roller 2 of the NIP, as well as the upper sheeting cylinder 6, the lower sheeting cylinder 7, the upper knife 8, the lower knife 9, the first servo drive 15 of the NIP, the second servo drive 16 of the reception device as well as the drives of the cylinders: the third servo drive 17 of the lower cylinder, the fourth servo drive 18 of the upper cylinder, the drive of the material-feeding roller - i.e., the NIP - the driven roller - the lower roller of the NIP 1. The station possesses the main plates 11, the clamps 5 of the cylinders, the sensors 32 for the angular position of the cylinders - the encoder 32, the mounting screws 33, a clutch of the cylinder / shaft, and visible are also, among others, bearing arrangement 36 with a hub, a fifth drive 23 with a transmission - this is the second drive of the reception device 4. The clutch 34 is chosen with an appropriate stiffness such that the stiffness of the clutch should grow along with the width, the magnitude of the station and / or the load parameters and / or the parameters regarding the working speed. Fig. 8 shows a close-up of the cylinders and a demonstration of meshing. Just upstream of the lower knife, one can see an undercut 19 of the cylinder. In Fig. 8, indication has also been made of - mounting screws 33 for the knife and channel 12 of the sheeting cylinder.

[0068] In Fig. 9, alternative options for the shape of the blades are shown for an exemplary blade for the machine in the narrow and wide versions. The parameters of the blades are chosen, as described, depending on the diameter of the shafts - cylinders. One of the parameters of the blade is, by way of example, the angle. Preferably, the angle a and the angle P are corresponding to each other and have the same purpose, wherein their values amount to between 0 and 30 degrees. Preferably, the angle a may amount to about 9.5 degrees - when the diameter of the cylinder amounts to about 80 cm, whereas preferably, the angle P may amount to about 6 degrees - when the diameter of the cylinder amounts to about 228 cm. By way of analogy, the angle y and the angle co preferably are corresponding to each other and have the same purpose, wherein their values amount to between 0 and 30 degrees. Preferably, the angle y may amount to about 8 degrees - when the diameter of the cylinder amounts to about 80 cm, preferably the angle co may amount to about 5 degrees - when the diameter of the cylinder amounts to about 228 cm. The dimensions A and B are corresponding and may amount to a value ranging from 0 to 2mm, preferably 0.85 mm, regardless of the magnitude of the cylinder. Hence, by way of example, the first dimension A of the blade may preferably amount to about 0.85 mm, the second dimension B of the blade may preferably amount to about 0.85 mm. In Fig. 10, a process of the meshing of the blade has been shown. A technical feature and the achieved technical effect of the station is the rotary imitation of the guillotine flat cutting. The blades - the upper knife 8, the lower knife 9, arranged on the sheeting cylinders 6,7, must, to a certain extent, imitate an approximate vertical cutting movement. The parameters of the knives are chosen such that at the time of cutting, the working pieces of the blades are substantially perpendicular to each other, however, certain deviations may also arise relative thereto. The blades mesh with each other and perform a collision-free exit. The collision-freeness is provided because of the fact that the average diameter of the meshing is different than the average distance between the sheeting cylinders 6,7 - as has been discussed. Because of this, the shape of the knives results from the diameter on which we are working. During cutting, the lower knife 9 - a sort of the base of the guillotine - is set substantially perpendicular to the material. This means that over a short distance, it sets itself sort of parallel to the web. The upper knife 8 has a sharp tip and at the time of cutting, is set perpendicular to the material. The ranges of the angles of the upper knife 8 amount to preferably between 0 and 30, and of the lower knife 9, to preferably between 0 and 30 degrees.

[0069] The method for cutting the material in the station for rotary transverse cutting of a material comprises the following steps:

[0070] 1. A process of accelerating the cylinders in order to attain a correct length of the sheet and a specific phase slide between the blades. This process takes place when the blades are unmeshed. Because of this, we attain setting of the length of the sheet.

[0071] 2. Stabilizing the speed of the cylinders to a speed proximate to the speed of the material. This allows us to avoid the start stop work. When cutting with the flat guillotine, we get a standing material and a substantially vertical movement of the knives. The synchronization speed may occur before and after the cutting-off In the machine, we adjust the length of the synchronous section from the operator panel.

[0072] 3. Tensioning the web in order to precisely perform the cutting-off Because of this, we attain tension of the web between the NIP - the material -feeding device and the reception device 4, as well as a stable behavior of the web. In effect, impermissibility arises of an inert behavior of the sheet - attaining better precision of the entire device. In the version with two reception tables of the reception device 4, we have the possibility of producing tension between the NIP and the reception tables - i.e., the reception device 4. This enhances the cutting quality and assists in controlling the process, avoiding an uncontrolled behavior of the single sheets.

[0073] 4. Meshing of the blades along with a simultaneous cutting off of the sheet, as a result of which the web turns into a sheet. The blades mesh at a right angle.

[0074] 5. Unmeshing of the blades and feeding of the sheet to a further process, wherein there occurs pushing of the sheet out of the station and preparation is made for cutting off of a subsequent one.

[0075] 6. Returning to point 1.

[0076] Further, as illustrated in Figures 17a, 17b, 17c, 17d, exemplary knife pairs mounted in cylinders are shown. For example, the course of operation of the knives in individual Figures 18a-18i is also illustrated. Exemplary "deg" values are also indicated, which preferably refers to the fact that the cylinders cooperate with each other by rotating in the opposite direction. This means that one of the cylinders rotates clockwise and the other counter-clockwise. It is a deviation, which is equal from the vertical axis of both cylinders. Fig. 18a shows the position of the knives with a value of -lOdeg, i.e. the angular approach of the knives before cutting; Fig. 18b shows the position of the knives with a value of -5deg, or about -5 degrees, the apices of the knives are positioned 90 degrees relative to each other and begin to cut the material; fig. 18c shows the position of the knives with a value of -3deg, i.e. the meshing of the knives; Fig. 18d shows the position of the knives with a value of - Ideg, i.e. the next stage of meshing; Fig. 18e shows the position of the knives with a value of Odeg, i.e. the vertical axis of the knives and grooves in the cylinders is aligned and this is the moment of the greatest meshing; Fig. 18f shows the position of the knives with a value of Ideg, i.e. the knives are coming out from the meshing, the closest distance of the upper apex from the body of the lower knife, Fig. 18g shows the position of the knives with a value of 3deg, i.e. the next stage of the knife coming out after cutting off; Fig. 18h shows the position of the knives with a value of 5deg, i.e. the next stage of unmeshing, the moment of unmeshing the knives; Fig. 18i shows the position of the knives with a value of lOdeg, i.e. the next step of unmeshing.

[0077] Cutting can be done with one or multiple blades. The number of pairs of knives is selected based on speed, geometric and structural requirements and depends on the length of the required sheets, which has already been explained. Embodiments are cylinders with diameters of about 220mm, in which geometric and strength conditions allow 6 knife grooves to be made. In this configuration, it is preferable to work with one pair of mounted knives, as in Fig. 17a, it is also preferable to work with two pairs of mounted knives, as in Fig. 17b, it is also preferable to work with three pairs of mounted knives, as in Fig. 17c, it is also preferable to work with six pairs of mounted knives, as in Fig. 17d. At the same time, increasing the number of knives in this case allows to increase the speed of work by the apices of the knives touching more frequently or by making shorter sheets without rotational movements of the cylinder that do not perform the cutting. The duty cycle is exactly the same for each case, the exemplary duty cycle has already been described. However, the difference is a result of the rotation that the cylinder has to make between the cuts. It is preferable to select the number of knives depending on the length of the sheet so that the distance travelled by the cylinder between the blades is similar to the length of the sheet. Accordingly, the acceleration and deceleration of the cylinder can be reduced. It is preferred that the knives are distributed in such a way that the moment of inertia of the shaft is in the spin axis. It is also possible, in alternative embodiments, to mount 4 or 5 pairs of corresponding knives, but at higher speeds it is necessary to additionally adapt the system to potentially generated vibrations. Fig. 19a schematically illustrates exemplary web cutting cycles for 2 knives, wherein the pairs of knives are marked as A and A' and B and B'. Fig. 19b schematically illustrates exemplary web cutting cycles for 6 knives, wherein the pairs of knives are marked as A and A' and B and B'. The web of material is introduced for cutting and the cut-out pieces are obtained. In alternative embodiments, the scheme may be analogous to other predetermined material variants, knives, other dimensional / size parameters, and other properties or performance.

[0078] In accordance with the embodiments of the station, the micro-adjustment by virtue of the servos provides an automatic change of the slot between the knives, which prolongs the operation of the blades, minimizes the error when setting the knives manually. The knives are mounted to the cylinders 6,7 - the upper sheeting cylinder 6 and the lower sheeting cylinder 7, through holes in the knives - the upper knife 8, the lower knife 9, and threaded holes in the cylinders 6,7, disposed across the entire length of the slot - the undercut 19 in the cylinder. The holes are in two planes practically perpendicular to each other. Additionally, the cylinder comprises small fine-threaded holes which allow for substantially vertical-plane adjustment of the knife. Moreover, owing to the driving of both cylinders 6,7, the setting of the knives 8,9 is automatic, owing to which the operator effort and time for tool change are minimized. This also assists in eliminating the operator errors and the inaccuracies in placement of the blades / knifes. The slot generated by the separate drives of the station from the "drives" section 10 - i.e., the third servo drive 17 and the fourth servo drive 18, allows to adjust the slot between the angular approach / each of the knives - i.e., the upper knife 8 and the lower knife 9. This adaptation takes place by evaluating the cutting quality. By way of example, thicker materials and / or those not requiring high quality allow for the knives to be spaced further apart and because of this, for service life thereof to be prolonged. Additionally, the individual adjustment allows, after an initial evaluation, to adjust each of the knives 8,9 separately depending on the cutting quality. In accordance with the structure of the station according to the embodiments, the drive of both cylinders allows to control them separately - different values of accelerations and angular speeds are input - and in effect, double contact of the blades is avoided, because of which appropriate adjustment to the length of the sheets and better removal of the sheets after cutting may be achieved.

[0079] According to the said embodiments, the base of the station are the two parallel main plates 11 with the formed slot 29, and the connecting beams and / or bars 13. The main plates 11 with the formed slot 29 may preferably be sort of U-shaped. The main portion are the two knife cylinders - the upper sheeting cylinder 6 and the lower sheeting cylinder 7. The cylinders possess a pair of slat blades or a plurality of the pairs - depending on the diameter of the shafts and the length of the sheets. The cylindrical cylinders - the upper sheeting cylinder 6 and the lower sheeting cylinder 7, possess channels 12 for attaching the blades. The cylinders possess undercuts 19 so that the material is not crushed - which is visible in Fig. 8.

[0080] The cylinders - the upper sheeting cylinder 6 and the lower sheeting cylinder 7, in alternative embodiments, like, e.g., in the narrow version, may be coupled together by gear wheels and possess a drive for one of the shafts - which, however, causes a decrease by one of the functionalities, wherein the upper sheeting cylinder 6, the lower sheeting cylinder 7 are coupled together by wheels (as in Fig. 5) - i.e., they are coupled together by wheels if there is one knife - , that is, the gear wheel 26 of the upper shaft, the counter wheel 27, the gear wheel 28 of the lower shaft.

[0081] In another alternative embodiment, each cylinder has its own separate servo drive, because of which each cylinder is controlled separately. Moreover, each sheeting cylinder may be slided in phase with each other. With the participation of the independent drives on the cylinders - the upper sheeting cylinder 6 and the lower sheeting cylinder 7, and the material-feeding device 20, the cylinders may be accelerated and cutting may be performed of sheets of a different length. Moreover, the station for cutting enables alternatively, through the operation of the upper sheeting cylinder 6 and the lower sheeting cylinder 7 and through the material-feeding device 20, for the individual elements to slided in phase with each other by means of the independent drives, which has a favorable influence on the adjustment of the cutting speed and / or length of the material. Through such an arrangement of the individual elements, the knives for cutting may be approached together in the case of thinner materials and the knives for cutting may be slided apart in the case thicker materials, which allows to prolong the service life of the knives / blades. In alternative cases, it is possible not to cut with all the pairs of the knives and to space some blades apart.

[0082] In accordance with the embodiments of the station, the lower sheeting cylinder 7 is mounted in fixed hubs. The upper sheeting cylinder 6 may be mounted in a bearing cube placed in the slot 29 of the main plate 11 of the station. In the case of one drive, according to an alternative embodiment, the upper sheeting cylinder 6 requires cants 25 rolling on the lower shaft - i.e., on the lower sheeting cylinder 7, and it is required to utilize a clamping device - i.e., the clamp 5, which system will clamp the upper sheeting cylinder 6 to the lower sheeting cylinder 7. The clamp 5 enables the upper sheeting cylinder 6 to jump clear when the blades collide. The knives are screwed to the cylinders. They may possess angular adjustment relative to the axes of the cylinders.

[0083] In accordance with the embodiments, the blades are made in an appropriate shape chosen depending on the geometry, that is, the diameter of the knives, to imitate the rotary guillotine cutting. In the station, the materials being cut are from 30 microns to 600 microns thick. The hardness of the individual blades - knives is identical and / or one of the blades / knives of the upper and / or lower one may be harder, like, by way of example, between 45-65HRC. Preferably with a hardness of 60 HRC, however, in alternative embodiments, depending on the work and the material being cut, the blades are changed according to the requirements. For example, the thinner the material with a thinner core, the more preferable it is to use a sharp knife, e.g. with a 20 degree tip. In an alternative embodiment, when the material is stiff and thick, knives with a thicker tips can be used to achieve high cutting quality. One of the knives has a sharp tip, this may be, by way of example, the upper knife 8 or the lower knife 9.

[0084] The lower knife 9 constitutes the base of the guillotine. The upper knife 8 constitutes a sharp cutting portion, an equivalent to the substantially vertical movable knife in the guillotine. The lower knife 9 comprises the undercut 31 which serves a cleaning function, where scraps of the cut-off material are collected so that they do not interfere with the further process and do not impurify the subsequent sheets. Moreover, a front edge of the next sheet may fall into this groove and not engage with the blade during the feeding of the material, which could cause the edge to deteriorate and the material to pile up because of the blockage thereof. The width of the machine defines the shape of the blades. According to the proportions, the wider the material, the wider the cylinders - the upper sheeting cylinder 6, the lower sheeting cylinder 7, and the change in the magnitude of the diameter of the cylinder determinates the other angles of the blade.

[0085] In the station for rotary transverse cutting of a material, depending on the work thereof, the thickness and kind of the web material, the degree of the meshing of the blades may be changed. In one variant, the cutting point is located on a diameter other than the average diameter between the shafts: the upper shaft - the upper sheeting cylinder 6 and the lower shaft - the lower sheeting cylinder 7, by way of example, if the average diameter between the shafts amounts to a selected - adapted value (for example, 228mm), then the point of cutting is taken above this diameter, this may preferably be 0.5mm or 0.3mm. Due to the acceleration, a higher linear speed of one of the shafts - cylinders to avoid a second contact of the blades during the "exit" of the cylinder. Due to the specificity of the operation of the device, the converging blades must have only one approach to each other occurring during the cutting - as one can see in Fig. 10. In a situation where the diameter is equal and the angular velocities are identical, the knives have two contacts with each other, i.e., during the first contact (the cutting point) and symmetrically after passing through the substantially vertical plane. The second contact is undesirable due to the possibility of damage to the material.

[0086] Upstream of the cylinders - the upper sheeting cylinder 6, the lower sheeting cylinder 7, a material-pushing device 20 (NIP) is located possessing the drive roller 1 and the rubber roller 2 clamping it. The material enters between the rollers: the driven roller 1 (the lower roller of the NIP), the rubber roller 2 (the upper roller of the NIP) and because of this, the material is fed precisely. Downstream of the cylinders - the upper sheeting cylinder 6, the lower sheeting cylinder 7, the receiving 4 and feeding / pushing device 20 is located for receiving the finished sheets and feeding / pushing them onto a conveyor. This receiving 4 and feeding / pushing device 20 may be present in a plurality of options. In one embodiment, it may be present as two conveyors, an upper and a lower one, the task of which is to grasp the sheet and produce tension of the web.

[0087] The device in alternative embodiments may operate in a feedback with a vision system or other system which checks the quality of the cutting edge and adapts the angular setting of the knives for a better cutting effect or informs about the wear of the blades. The device in alternative embodiments may operate with a cylinder-cleaning system. During operation, constant monitoring occurs of the loads of the servos driving the cylinders - that is, the third servo drive 17 of the lower cylinder, the fourth servo drive 18 of the upper cylinder. The station possesses an interface, a computer - a controller with a software for calculating, controlling, calibrating. Owing thereto, adjustment occurs consisting in checking the load of a servo. If the tools - i.e., the knives adhered to the upper and lower shafts, approach each other too tightly, a temporary rise in the load of the servo motor occurs above the rated values. Based on the loads, calibrating and pre-setting are also performed of the knives - that is, the upper knife 8 and the lower knife 9.

[0088] Each of the servomotors - i.e., the first servo drive 15 of the NIP, the second servo drive 16 of the reception device, the third servo drive 17 of the lower cylinder, the fourth servo drive 18 of the upper cylinder, is present with an encoder with a resolution of preferably 0.0309 arc-second. The choice of the resolution allows to measure the angular position, by way of example, up to 0.00017mm on the arc circled by the knife / blade. Additionally, in alternative embodiments, the encoders may be mounted to the cylinders from the side opposite to the drive, because of which they then measure the direct angular position (with longer machines), which encoders are marked in the Fig. 13 in the example for the machine in the wide version. For lower or higher dimensions, these parameters will be adapted accordingly, which apparent to a person skilled in the art.

[0089] Each of the cylinders: the upper sheeting cylinder 6, the lower sheeting cylinder 7, may perform a minimum movement of about 1 micron on the circumference.

[0090] On the other side of the cylinder, the upper sheeting cylinder 6, the lower sheeting cylinder 7, the encoders 32 may be mounted so as to monitor the real angular position of the cylinder. Due to the acceleration and deceleration of the machine, this eliminates the twisting and mechanical hysteresis of the clutch 34 from the drive and the clearances originating from the clutch and transmission. Through the use of the encoder 32, it becomes possible to additionally verify the working parameters relative to the parameters read from the sensors of the servo drives. Each and every information and data and parameters are analyzed by the program comprised in the machine controller and are displayed and set on a panel of the user interface.

[0091] A material change-detecting sensor 30 is mounted upstream of the station. In this case, these are "tabs", that is, notched ears on one or both sides of the material. Owing thereto, the cutting may be performed at an accurate site relative to the material. The present solution is intended to be used in cutting of a material in the field of devices for transverse cutting of a web of active materials in the accumulator-manufacturing industry, where in effect, production of electrode sheets is attained in the accumulator-manufacturing machines. A station of this kind is utilized before the process of stacking the cells. In an embodiment, when the device is used as a machine in the field of battery manufacturing, it can be assumed that materials intended for this purpose are applied. These are especially copper, aluminium, nickel films covered with various materials, e.g. graphite, or materials containing binders and active materials (for example, NMC, NCA, LMO, LCO). The device can also be utilized in the printing industry and every industry requiring the processing of a web and web sheets.

[0092] The present invention is not limited only to the embodiments shown above. Various modifications and developments thereof are possible within the scope of the appended claims, without departing from the essence of the present invention.

[0093] List of references

[0094] 1 Driven roller, lower roller of a NIP

[0095] 2 Rubber roller clamped by means of actuators, upper roller of the NIP

[0096] 3 Clamping system of the rubber roller

[0097] 4 Reception site - Sheet-receiving device

[0098] 5 Optional clamping system of cylinders

[0099] 6 Sheeting cylinder - upper shaft

[0100] 7 Sheeting cylinder - lower shaft

[0101] 8 Upper knife

[0102] 9 Lower knife

[0103] 10 "Drives" section

[0104] 11 Main plates of the station

[0105] 12 Channels of the cylinder

[0106] 13 Connecting elements - Bars and / or beams connecting the station's main plates

[0107] 14 Lateral adjustment of the upper cylinder

[0108] 15 First servo drive of the NIP

[0109] 16 Second servo drive of the reception device

[0110] 17 Third servo drive of the lower cylinder

[0111] 18 Fourth servo drive of the upper cylinder

[0112] 19 Undercuts of the cylinders

[0113] 20 Material-feeding device - NIP, material -pushing device (NIP)

[0114] 21 Shaft pins on the drive side

[0115] 22 Shaft pins on the operator side

[0116] 23 Fifth drive - second drive of the reception device

[0117] 24 Attachment of the reception device

[0118] 25 Cant of the upper shaft

[0119] 26 Gear wheel of the upper shaft (optional)

[0120] 27 Angular clearance-reducing counter wheel (optional)

[0121] 28 Gear wheel of the lower shaft (optional)

[0122] 29 Slot of the main plate

[0123] 30 Material change-detecting sensor

[0124] 31 Undercuts in the lower knife

[0125] 32 Sensors for the angular position of the cylinders encoders

[0126] 33 Mounting screws

[0127] 34 Clutch of the cylinder / shaft

[0128] 35 Attachment of the sensor

[0129] 36 Bearing arrangement with a hub

[0130] 37 Horizontal-plane mounting holes

[0131] 38 Vertical-plane mounting holes

[0132] 39 Threaded holes for vertical-plane adjustment

Claims

Claims1. A station for rotary transverse cutting of a material, comprising a housing, sheeting cylinders with knives, rollers, characterized in that an upper sheeting cylinder (6) and a lower sheeting cylinder (7) arranged in the housing possess undercuts (19) as well as channels (12) for at least one pair of blades - for an upper knife (8) and a lower knife (9), wherein the upper sheeting cylinder (6) and the lower sheeting cylinder (7) are driven from a "drive" section (10), wherein at a certain stage, the upper knife (8) and the lower knife (9) arranged on the upper sheeting cylinder (6) and the lower sheeting cylinder (7) imitate an approximate vertical cutting movement.

2. The station according to claim 1, characterized in that at the time of cutting, the working elements of the blades - the upper knife (8) and the lower knife (9) - are substantially perpendicular to each other, and the upper knife (8) and the lower knife (9) mesh with each other and perform a collision-free exit.

3. The station according to any one of the preceding claims 1 - 2, characterized in that the upper sheeting cylinder (6) and the lower sheeting cylinder (7) have separate servo drives - a third servo drive (17), a fourth servo drive (18).

4. The station according to any one of the preceding claims 1 - 3, characterized in that the "drive" section (10) comprises a servo drive (15) of a NIP, a second servo drive (16) of a reception device (4), the third servo drive (17) of the lower cylinder, the fourth servo drive (18) of the upper cylinder, a fifth drive (23) as a second drive of the reception device.

5. The station according to any one of the preceding claims 1 - 4, characterized in that it possesses a receiving device (4) at an exit of the station, wherein the receiving device (4) comprises a belt conveyor (1) and / or a belt conveyor (2) and / or a reception site.

6. The station according to any one of the preceding claims 1 - 5, characterized in that it comprises a lateral adjustment (14) of the upper sheeting cylinder (6) and comprises a lateral adjustment of the blades - the upper knife (8) and the lower knife (9) - by the lateral adjustment (14) of the cylinder and / or the individual adjustments of the each blade - the upper knife (8) and the lower knife (9) - by a mounting system with substantiallyhorizontal mounting holes (37), with substantially vertical mounting holes (38) and adjustment bolts in the adjustment holes (39).

7. The station according to any one of the preceding claims 1 - 6, characterized in that on the other side, the upper cylinder (6) and the lower cylinder (7) possess a cylinder / shaft clutch (34) and the servo drives (17, 18) with a transmission.

8. The station according to any one of the preceding claims 1 - 7, characterized in that the lower knife (9) or the upper knife (8) comprises an undercut (31).

9. The station according to any one of the preceding claims 1 - 8, characterized in that the upper sheeting cylinder (6) and the lower sheeting cylinder (7) are slidable in phase with each other through the independent drives - the third servo drive (17) of the lower cylinder, the fourth servo drive (18) of the upper cylinder - which determine the distances between the upper knife (8) and the lower knife (9) for optimizing the cutting quality.

10. The station according to any one of the preceding claims 1 - 9, characterized in that the upper sheeting cylinder (6) and the lower sheeting cylinder (7) and a material-feeding device (20) are slidable in phase - they have different linear speeds relative to each other through the independent drives, for adjusting the cutting speed and / or length.

11. The station according to any one of the preceding claims 1 - 10, characterized in that it possesses encoders (32) arranged on the sheeting cylinders (6, 7), wherein the encoders (32) simultaneously measure and adapt in a controlled manner the real shaft position of the sheeting cylinder - the upper sheeting cylinder (6), the lower sheeting cylinder (7) - to the motor shaft position of the servo drive - the third servo drive (17) of the lower cylinder and the fourth servo drive (18) of the upper cylinder.

12. The station according to any one of the preceding claims 1, 2, 5, 6, 8, characterized in that the upper sheeting cylinder (6), the lower sheeting cylinder (7) are coupled together by wheels - a gear wheel (26) of the upper shaft, a counter wheel (27), a gear wheel (28) of the lower shaft - and driven through the third drive (17) of the cylinder.

13. The station according to claim 12, characterized in that it is equipped with the encoder (32).

14. The station according to any one of the preceding claims 1 - 13, characterized in that it is equipped with clamps (5) of the cylinders.

15. The station according to any one of the preceding claims 1 - 14, characterized in that the third drive (17) of the lower cylinder is coupled with the lower cylinder (7) through the clutch (34).

16. The station according to any one of the preceding claims 1 - 15, characterized in that it possesses a feeding device (20) comprising a lower roller (1) and an upper roller (2) with a clamping system (3).

17. A method for cutting sheets in the station defined in accordance with any one of the preceding claims 1 - 16, characterized in that it comprises the following steps: a) A step of accelerating the cylinders in order to attain a correct length of the sheet and a specific phase slide between the blades; b) Stabilizing the speed of the cylinders to a speed proximate to the speed of the material; c) Tensioning the web in order to precisely perform the cutting; d) Meshing of the blades along with a simultaneous cutting off of the sheet, as a result of which the web turns into a sheet, and the blades mesh substantially at a right angle; e) Unmeshing of the blades and feeding of the sheet to a further process, wherein there occurs pushing of the sheet out of the station and preparation is made for cutting off of a subsequent one; f) Returning to the initial step.

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