System and method for producing a material strip, assembly of manipulation devices for manipulating the strip speed, and use of a drive roller unit

Abstract

The invention relates to a system for producing a continuously cast material strip conveyed along a conveying path in the conveying direction, having a continuously operating strip casting machine for primarily shaping the material strip, wherein a manipulation device for manipulating the strip speed is provided downstream of the strip casting machine, the manipulation device being used to supply a strip reserve between the strip casting machine and the manipulation device and / or a strip counterpressure at the strip casting machine.

Description

[0001] Page 1 of 43

[0002] Applicant: SMS group GmbH

[0003] Our reference number: P80909DE

[0004] September 16, 2024

[0005] Plant and method for producing a material strip, arrangement of manipulation devices for manipulating a strip speed, and use of a drive roller unit

[0006] The invention relates to a system for producing a continuously cast material strip conveyed along a conveyor line in the conveying direction, comprising a continuously operating strip casting machine for the initial forming of the material strip.

[0007] The invention further relates to an arrangement comprising a first manipulation device for manipulating a belt speed of a material belt moving along a conveyor line in the conveying direction and at least a second manipulation device for manipulating a belt speed of this material belt.

[0008] The invention also relates to a method for producing a continuously cast material strip conveyed along a conveying path in the conveying direction, in which the material strip is continuously cast by means of a strip casting machine and conveyed forward in the conveying direction, and in which the material strip is further processed downstream of the strip casting machine by means of at least one processing device, in particular a hot rolling device.

[0009] The invention further relates to the use of a drive roller unit for driving a material belt. Page 2 of 43

[0010] P80909DE

[0011] From the prior art, in particular plants of this type for producing a material strip conveyed along a conveying line in the conveying direction and continuously cast with a strip casting machine are known, especially also with processing devices downstream on the conveying line, such as rolling devices comprising rolling stands in particular for the direct hot rolling of the material strip previously cast on the strip casting machine.

[0012] Such systems have proven particularly useful in the production of aluminium strips, especially with a strip casting thickness of less than 25 mm and a finished strip thickness of less than 2 mm.

[0013] The invention is based on the objective of providing an improvement or an alternative to the prior art. In particular, the invention is based on the objective of enabling the casting of continuously cast material strips with greater dimensional accuracy and subsequent more advantageous processing.

[0014] The object of the invention is to provide a system for producing a continuously cast material strip conveyed along a conveyor in the conveying direction, comprising a continuously operating strip casting machine for the initial forming of the material strip, wherein a manipulation device for manipulating the strip speed is arranged downstream of the strip casting machine, by means of which a strip reserve between the strip casting machine and the manipulation device and / or a strip back pressure at the strip casting machine can be provided.

[0015] By arranging such a manipulation device downstream, i.e., behind the belt casting machine in the direction of conveyance, at least two primary effects can be achieved independently of each other. Page 3 / 43

[0016] P80909DE

[0017] Firstly, by means of the manipulation device, a belt reserve can be generated and provided at the plant with regard to the continuous material belt, by means of which a decoupling of the belt casting machine and downstream processing devices at the plant can be achieved, whereby the material belt is nevertheless endless from the belt casting machine to this processing machine, i.e. not cut or already prepared.

[0018] This allows the operation of the strip casting machine to be more independent of downstream processing devices, such as a rolling mill, or vice versa. This makes it possible to adjust the operating parameters of the strip casting machine despite a coupled mass flow.

[0019] Furthermore, the risk of a band rupture at the system can be significantly reduced with the help of the band reserve.

[0020] Furthermore, the manipulation device allows the belt tension of the material belt to be adjusted much more easily in relation to a downstream processing device.

[0021] Advantageously, the strip reserve can be generated and applied downstream of the strip casting machine and upstream of the handling device, so that the strip casting machine can always continuously produce and discharge the material strip, especially regardless of how downstream processing steps are carried out, for example with a temporarily faster or slower processing of the material strip.

[0022] Secondly, the proposed manipulation device can be used to generate and adjust a back pressure on the material strip at the strip casting machine, so that the downstream manipulation device can be used to apply pressure to the material strip shown on page 4 / 43.

[0023] P80909DE

[0024] The ongoing casting process of a belt casting machine can be influenced.

[0025] Specifically, shrinkage effects on the material strip can be counteracted by influencing the strip back pressure on the strip casting machine, whereby such shrinkage effects can occur as a result of cooling of the material melt and / or the cast material strip on and / or in the strip casting machine.

[0026] Such shrinkage effects could previously only be counteracted by adjusting the process at the strip casting machine. According to the invention, this is now achieved cumulatively or alternatively by a device downstream of the strip casting machine.

[0027] In particular, the manipulation device can be used to temporarily reduce the belt speed of the material belt compared to the initial speed inside the belt casting machine and / or the exit speed of the material belt at the belt casting machine in order to build up the belt reserve and / or the belt back pressure.

[0028] For the purposes of the invention, the term "belt speed" generally describes a speed downstream of the belt casting machine, which the material belt has at least a short distance behind the outlet of the belt casting machine, preferably 500 mm or more behind the outlet of the belt casting machine, preferably 1,000 mm or more and particularly 2,000 mm or more, especially at or behind the present manipulation device.

[0029] Therefore, the term "belt speed" describes a conveying speed of the material belt further downstream of the belt casting machine, which differs from the exit speed (page 5 / 43).

[0030] P80909DE on the one hand and the initial speed on the other hand differs.

[0031] In this respect, the conveying speed of the material belt, characterized by the term "belt speed", differs from the exit speed described here at or before the exit of the belt casting machine, at which the material belt exits the belt casting machine into the environment and is then transferred to a roller conveyor of the conveying line.

[0032] In the context of the invention, the term "initial velocity" refers to a velocity by which the solidifying and / or solidified material strip is initially moved forward in the conveying direction in the strip casting machine.

[0033] This initial speed can correspond to the peripheral speed of a conveying device of the strip casting machine, such as a conveyor system or the like. The peripheral speed of a conveying device of the strip casting machine can be understood as the strip speed of the strip casting machine and / or the mold speed of a mold circulating within the strip casting machine.

[0034] The term "belt reserve" is understood here to mean an excess of belt which can be "accumulated" on the conveyor line downstream of the belt casting machine and upstream of the present manipulation device in order to be able to separate work processes with regard to the belt casting machine and downstream processing devices from each other in terms of process technology.

[0035] The terms "belt back pressure" and / or "increased belt back pressure" describe compressive forces and / or compressive stresses on the material belt and / or specifically within the material belt. (See page 6 / 43)

[0036] P80909DE, depending on the selected level of the tape back pressure, a “compression” of the material tape can also be achieved, as is intended here.

[0037] The belt counter-pressure is initiated in such a way that it acts in the material belt in the opposite direction to the conveying direction towards the belt casting machine.

[0038] Thus, the term "belt counter-pressure" is in contrast to the term "belt tension", which describes tensile forces and / or tensile stresses on the material belt and / or specifically within the material belt.

[0039] For example, the risk of critical wrinkling, cracking, or similar issues with the material tape can be reduced by means of a belt tension.

[0040] The term "downstream" refers to a location which, viewed in the direction of transport, is situated behind a position to which reference is made.

[0041] Therefore, the expression "upstream" refers to a place which, viewed in the direction of transport, is located in front of a position to which reference is made.

[0042] It should be noted here that, within the context of the present patent application, indefinite articles and indefinite numerical expressions such as "one...", "two...", etc., are generally to be understood as minimum specifications, i.e., "at least one...", "at least two...", etc., unless it is clear from the context or the specific text of a particular passage that only "exactly one...", "exactly two...", etc., is meant. Page 7 of 43

[0043] P80909DE

[0044] It should also be noted here that, within the context of the present patent application, the expression "in particular" is always to be understood as introducing an optional, preferred feature. The expression is not to be understood as "namely" or "namely".

[0045] In other words, the invention generally proposes a system for producing a continuously cast material strip conveyed along a conveyor line in the conveying direction, comprising a continuously operating strip casting machine for the initial forming of the material strip, in which a device for generating a strip reserve and / or a reservoir of strip material is arranged downstream of the strip casting machine.

[0046] As already described, this allows in particular the decoupling of a continuously operating strip casting machine and downstream processing devices, such as a rolling device, especially with a hot rolling stand, or the like.

[0047] Therefore, the present manipulation device can also be regarded as a decoupling device for decoupling a belt feed in the conveying direction of the material belt with regard to the belt reserve.

[0048] This allows a belt buffer to be established on the conveyor line, in a very simple case for example by a corresponding belt sag.

[0049] On the other hand, the invention proposes a system for producing a continuously cast material strip conveyed along a conveyor line in the conveying direction, comprising a continuously operating strip casting machine for the initial forming of the material strip, in which a page 8 / 43 is located downstream of the strip casting machine.

[0050] P80909DE

[0051] A pressure build-up device is arranged to build up a band counter-pressure against the band casting machine.

[0052] The counter-pressure of the belt can counteract critical shrinkage of the material strip as it cools and solidifies on the belt casting machine, as explained above.

[0053] It is understood that, as a side effect of reducing the belt feed speed downstream of the belt casting machine to provide the belt reserve, a different belt back pressure may also occur on the material belt.

[0054] Therefore, it is also possible to manipulate the belt back pressure and / or the increased belt back pressure depending on the generation of a belt reserve and vice versa.

[0055] Preferably, the strip casting machine is set up for the primary forming of an aluminium material strip or another non-ferrous material strip, such as a Mg, Zn, Sn, Cu, Pb material strip or alloys thereof.

[0056] Advantageously, the strip casting machine can be designed as a strip casting machine with a circulating mold, in particular in the form of a circulating belt or caterpillar, especially as a caterpillar strip casting machine.

[0057] To enable the provision of the strip reserve and the increased strip back pressure to be implemented more independently of each other and thus more precisely at the system downstream of the strip casting machine, it is advantageous to arrange an additional manipulation device for manipulating the strip speed between the strip casting machine and the manipulation device. Page 9 / 43

[0058] P80909DE

[0059] This allows two manipulation devices to be connected in series, in order to realize cumulative effects and advantages downstream of the strip casting machine.

[0060] Therefore, an arrangement of two manipulation devices arranged directly one behind the other is advantageous for reducing the belt speed of the material belt multiple times, but at least twice, in particular temporarily, wherein a first manipulation of the belt speed is set up to provide an increased belt back pressure at the conveying line and / or at the belt casting machine, and wherein a further, in particular second, manipulation of the belt speed is set up to provide a belt reserve at the conveying line, in particular behind the belt casting machine.

[0061] The term "immediately" describes the fact that at least one manipulation device is located directly behind the strip casting machine.

[0062] In other words, this means that no processing device is arranged between the strip casting machine by means of which the material strip is structurally processed, such as a rolling device for forming the material strip, a shearing device for cutting the material strip to length, or the like.

[0063] In any case, it is advantageous if a pressure build-up device for building up a strip back pressure against the strip casting machine is arranged between a device for generating a strip reserve and the strip casting machine.

[0064] The proposed arrangement can be installed particularly easily on the existing system if the system has a cascade device consisting of two manipulation devices. Page 10 / 43

[0065] P80909DE

[0066] The term “cascade device” describes, within the meaning of the present invention, a device which has at least two manipulation devices that are arranged one behind the other.

[0067] Such a cascade device can, for example, be advantageously retrofitted to an existing plant for the production of a material strip.

[0068] Furthermore, it is advantageous if a construction space and / or a conveyor section between the strip casting machine and a handling device and / or a construction space and / or a conveyor section between two handling devices arranged one behind the other in the conveying direction are free of processing devices for processing the material strip.

[0069] If a construction space between the strip casting machine and the handling device is freely designed, both a strip reserve upstream of the handling device can be advantageously provided, and a strip back pressure can be advantageously applied up to the exit of the strip casting machine and, if necessary, possibly further against the conveying direction.

[0070] If a space between two manipulation devices is freely designed, either cumulatively or alternatively, a belt reserve can be advantageously provided between the manipulation devices.

[0071] I is a manipulation device spaced at a distance of greater than or equal to 1,500 mm from the strip casting machine and / or from another manipulation device - Page 11 / 43

[0072] P80909DE arranges, preferably of greater than or equal to 2,000 mm and particularly preferably of greater than or equal to 2,500 mm, a strip reserve can be advantageously provided.

[0073] If a manipulation device is arranged opposite the strip casting machine and / or opposite another manipulation device at a distance of less than or equal to 4,000 mm, preferably less than or equal to 3,500 mm and particularly preferably less than or equal to 3,000 mm, a strip back pressure can be reliably built up in accordance with the invention, in particular without undesirable warping of the material strip or the like.

[0074] Furthermore, for the provision of a belt reserve in accordance with the invention, it is advantageous if a lowerable conveyor section is arranged upstream of a manipulation device.

[0075] A lowerable conveyor section of this type is often also referred to as a loop pit on a conveyor line for conveying a belt of material.

[0076] However, such a lowerable conveyor section or a related mode of operation is not necessary or advantageous for providing an increased belt back pressure in accordance with the invention.

[0077] If a manipulation device is controlled depending on a working speed, in particular a casting speed, of the strip casting machine and / or a rotational speed of a conveyor system of the strip casting machine, a strip reserve and / or strip back pressure can be provided significantly more precisely. Page 12 / 43

[0078] P80909DE

[0079] It should also be mentioned here that the term "control" is to be understood in the sense of "regulate" as well. Therefore, in this context, a control device is preferably always also a regulating device.

[0080] The manipulation device can be configured in various ways to manipulate the belt speed on the conveyor, particularly to temporarily reduce the belt speed. For example, the manipulation device can have flat contact elements that are brought into contact with the material belt and can thus interact to reduce the belt speed in the manner of a frictional locking device.

[0081] However, it is more advantageous if the manipulation device has feed devices, in particular roller-shaped feed devices, which are designed to advance, in particular, an aluminum material strip or another non-ferrous material strip, such as a Mg, Zn, Sn, Cu, Pb material strip or alloys thereof, in the conveying direction.

[0082] Such feed devices, in particular roller-shaped feed devices, can on the one hand only interact with the material strip in the sense of line contact and / or roll on this material strip, whereby the surface of the material strip is subjected to less area stress.

[0083] On the other hand, the feed devices, especially roller-type feed devices, can be provided with a surface texture. This can, among other things, favorably influence the surface quality of the material strip.

[0084] Depending on the effects to be achieved with the respective manipulation device, it is advantageous if a page 13 / 43

[0085] P80909DE

[0086] The manipulation device can be controlled depending on torque and / or speed.

[0087] In particular, the proposed feed devices, especially roller-shaped feed devices, allow for the simple construction of a torque-dependent and / or speed-dependent controlled manipulation device.

[0088] With regard to a preferred embodiment, it is advantageous if a manipulation device has a drive roller unit for driving the material belt.

[0089] By means of a drive roller unit, in particular temporary manipulation of the belt speed can be achieved even in a small installation space, especially if the drive roller unit is characterized by the roller-shaped feed devices described above, in particular in the form of working rollers.

[0090] It is understood that the drive roller unit can, for example, consist of a single drive roller, whereby the material belt can be guided between this single drive roller of the drive roller unit and a roller conveyor roller of a roller conveyor along the conveying path of the plant.

[0091] In the context of the invention, the term "drive roller" describes a cylindrical roller element that can rotate about its longitudinal axis. The drive roller can be actively controlled and / or regulated depending on torque and / or speed. More precisely, the drive roller can be actively accelerated, either positively or negatively, independently of the movement of the material strip.

[0092] The terms "roller-shaped feed device" and "drive roller" can also be used synonymously. Page 14 / 43

[0093] P80909DE

[0094] The present manipulation device can interact more intimately with the material belt if the drive roller unit has at least one lower drive roller and at least one upper drive roller, wherein the drive roller unit has a distance adjustment device by means of which a distance between the at least one lower drive roller and the at least one upper drive roller can be adjusted.

[0095] The belt speed can also be manipulated more precisely using both lower and upper drive rollers.

[0096] Furthermore, forces in the material belt can be influenced more advantageously if the material belt interacts on both sides with actively driven drive rollers whose distance to each other is adjustable.

[0097] In particular, the distance adjustment device allows the drive roller unit to be adjusted to requirements regarding different belt thicknesses, belt materials or the like.

[0098] The drive roller unit can be operated more precisely with regard to the needs of the present system if the drive roller unit has at least one actuator for influencing a belt back pressure and / or a belt tension of the material belt.

[0099] By means of such an actuator, the drive rollers of the drive roller unit can be controlled and / or regulated in such a way that a required back pressure on the material strip, in particular against the strip casting machine, or a required strip tension, in particular against a processing device located further downstream, is established. Page 15 / 43

[0100] P80909DE

[0101] Suitable measures can be implemented, for example, by adjusting the torques and / or speeds on the drive rollers depending on a determined belt back pressure or belt tension, possibly in combination with adjusting a distance between the lower and upper drive roller.

[0102] It is understood that the actuator functions described above can be implemented in different ways.

[0103] Such actuators can be implemented in a particularly advantageous way if the drive roller unit has a speed-variable drive device for driving at least one drive roller of the drive roller unit and / or a torque-variable drive device for driving at least one drive roller of the drive roller unit.

[0104] Using such drive devices, values ​​regarding desired or required belt counter-pressures and / or belt tensions can be manipulated with particular precision.

[0105] Suitable drive systems can include, for example, synchronous lathes and / or doubly fed asynchronous machines.

[0106] For example, with regard to the material strip, back pressures on the strip casting machine can be manipulated very effectively and / or set sufficiently high if the peripheral speed of a drive roller of the drive roller unit is 99.8% or less of the peripheral speed of a circulating conveyor on the strip casting machine, preferably 99.6% or less, and particularly preferably 99% or less. Preferably, the peripheral speed of a drive roller of the drive roller unit is 99.7% or less of the peripheral speed of a circulating conveyor on page 16 / 43.

[0107] P80909DE

[0108] Strip casting machine, further preferably 99.5% or less and particularly preferably 99.3% or less.

[0109] In this context, it has proven advantageous if the peripheral speed of a drive roller of the drive roller unit is 95% or more of the peripheral speed of the circulating conveyor on the strip casting machine, preferably 96% or more, and particularly preferably 97% or more. Preferably, the peripheral speed of a drive roller of the drive roller unit is 96.5% or more of the peripheral speed of a circulating conveyor on the strip casting machine, further preferably 97.5% or more, and particularly preferably 98% or more.

[0110] In this case, a circulating conveying system of the strip casting machine can include, for example, a belt or mold system, or the like, to design a crawler conveyor unit on the strip casting machine. Alternatively, a conveying system can also include roller systems or similar components.

[0111] In this respect, the material strip on a manipulation device has a strip speed that is 2% or less lower than the initial speed of the cast material strip in the strip casting machine, preferably 1.5% or less, and particularly preferably 1% or less. Sufficient strip back pressure can already be provided at the strip casting machine by means of such a small speed difference.

[0112] Furthermore, it is advantageous if a manipulation device for manipulating the strip speed, by means of which an increased strip back pressure can be provided at the strip casting machine, is located opposite the strip casting machine depending on a setting on the strip casting machine, in particular on page 17 / 43

[0113] P80909DE

[0114] The casting nozzle device of the strip casting machine can control the determined material strip thickness.

[0115] Furthermore, it has proven advantageous if a manipulation device for manipulating the tape speed is controllable depending on another manipulation device for manipulating the tape speed.

[0116] This allows the interaction of two or more manipulation devices connected in series to be influenced in a particularly targeted manner.

[0117] It is advantageous if a rolling device for rolling the material strip is arranged downstream of a manipulation device for manipulating the belt speed, by means of which a belt reserve can be provided.

[0118] Conversely, this means that the manipulation device is arranged upstream of the rolling device, so that the manipulation device can be used immediately to optimize a strip tension between the manipulation device and the rolling device, while this manipulation device can preferably be used simultaneously to provide the strip reserve.

[0119] This allows for a simple structural decoupling between the casting process of the material strip on the strip casting machine and a mechanical processing device located further downstream.

[0120] This is particularly advantageous with regard to a rolling mill characterized by at least one hot rolling stand, by means of which the strip of material cast shortly beforehand from a molten material can be hot-rolled directly at the mill, preferably without an intermediate separation. Page 18 / 43

[0121] P80909DE

[0122] It should be mentioned again at this point that the belt casting machine can be designed differently, for example as a roller belt casting machine or the like.

[0123] However, the invention proposed here can be used particularly effectively if the strip casting machine comprises a circulating mold in the form of two circulating strips or caterpillars.

[0124] Such strip casting machines, often also referred to as crawler strip casting machines, are characterized by at least one crawler drive unit, with two crawler drive units being preferred, namely a lower and an upper crawler drive unit. Such crawler drive units have a circulating belt or chain drive.

[0125] Since strip casting machines with a rotating mold are already known from the prior art, their further construction and / or function will not be discussed in more detail here.

[0126] In any case, it is advantageous if the strip casting machine has a strip thickness casting capacity of greater than or equal to 5 mm, preferably greater than or equal to 7.5 mm and particularly preferably greater than or equal to 10 mm, and / or a strip thickness casting capacity of less than or equal to 40 mm, preferably less than or equal to 30 mm or less than or equal to 20 mm and particularly preferably less than or equal to 10 mm.

[0127] This allows aluminum material strips, but also other non-ferrous material strips, to be advantageously produced with the present system.

[0128] If the strip casting machine has a strip casting capacity of greater than or equal to 100 mm, preferably greater than or equal to 500 mm and particularly preferably greater than or equal to 1,000 mm, page 19 / 43

[0129] P80909DE and / or a strip casting capacity of less than or equal to 2 . 800 mm, preferably less than or equal to 2 . 300 mm or less than or equal to 1 . 800 mm and particularly preferably less than or equal to 1 . 500 mm, even aluminum material strips of such wide dimensions, but also other non-ferrous material strips, can be advantageously produced.

[0130] Furthermore, it is advantageous for the production of such material strips if the strip casting machine has a strip casting speed of greater than or equal to 2 m / min, preferably greater than or equal to 5 m / min and particularly preferably greater than or equal to 8 m / min, and / or a strip casting speed of less than or equal to 15 m / min, preferably less than or equal to 12 m / min and particularly preferably less than or equal to 10 m / min.

[0131] The system can be expediently extended by a strip cooling device for cooling the material strip. According to an advantageous embodiment, this device can be arranged downstream of a processing device, in particular downstream of a rolling device.

[0132] Preferably, this strip cooling device is arranged downstream of a rolling device, in particular downstream of a hot rolling stand.

[0133] For further processing of the material strip, it is advantageous if the system has a belt brush device for brushing the material strip.

[0134] Preferably, the belt brush device is arranged upstream of the rolling mill, in particular upstream of a hot rolling mill stand. Page 20 / 43

[0135] P80909DE

[0136] The present plant can be further appropriately equipped if the plant includes at least one belt shear for cutting the material belt, which is arranged downstream of the manipulation device, in particular a reservoir generation device.

[0137] At least one belt shear can also be used for further decoupling on the conveyor line.

[0138] At least one of the band shears can be designed as a flying band shear for this purpose.

[0139] Furthermore, it is advantageous if the system has one or preferably two reeling devices for winding the material strip, in particular with a constant torque, wherein the reeling device has at least one actuator for influencing an angular velocity and / or a torque.

[0140] According to a further aspect of the invention, the present problem is also solved by an arrangement comprising a first manipulation device for manipulating the belt speed of a material belt moving along a conveyor line in the conveying direction and a second manipulation device for manipulating the belt speed of this material belt, wherein the arrangement is located on the conveyor line between a belt casting machine for continuously casting the material belt and a processing device for processing this continuously cast material belt.

[0141] Using such an arrangement, both a belt back pressure and a belt reserve can be provided particularly precisely downstream of a belt casting machine.

[0142] The two manipulation devices can interact directly with each other if there is a space between the first and page 21 / 43

[0143] P80909DE the second manipulation device is free from a processing device for processing the material strip.

[0144] As already described above, the manipulation devices according to the invention can be implemented in a particularly simple yet effective manner if each manipulation device has a drive roller unit for driving the material belt.

[0145] By means of such an arrangement, a device for handling a continuously cast material strip conveyed along a treatment section can be realized with a first drive roller unit for compressing a material dispensed from a strip casting machine upstream of the first drive roller unit and with a second drive roller unit for generating a material strip reserve downstream of the first drive roller unit and upstream of the second drive roller unit.

[0146] The object of the invention is also solved by a method for producing a continuously cast material strip conveyed along a conveying path in the conveying direction, in which the material strip is continuously cast by means of a strip casting machine and conveyed forward in the conveying direction, preferably continuously, and in which the material strip is further processed downstream of the strip casting machine by means of at least one processing device, in particular a hot rolling device, wherein the method is characterized in that the material strip downstream of the strip casting machine, but upstream of the at least one processing device, is conveyed forward at least once at a slower rate in the conveying direction such that a strip reserve is generated between the strip casting machine and the at least one processing device, and / or an increased strip back pressure is generated at the strip casting machine.Page 22 / 43.

[0147] P80909DE

[0148] The proposed method allows, on the one hand, the optimization of casting and / or production processes with regard to the material strip directly at the strip casting machine, and on the other hand, the decoupling of the strip casting machine from downstream processing processes for the mechanical processing of the material strip to be achieved.

[0149] It is advantageous if the material strip is conveyed more slowly forward on a first drive roller unit than on and / or in the strip casting machine before the material strip is fed to the at least one processing device.

[0150] This allows a counter-pressure to be built up and / or increased on the strip of material at the strip casting machine, so that shrinkage effects on the solidifying and / or further cooling strip of material can be counteracted.

[0151] Therefore, increasing the belt back pressure can counteract critical belt shrinkage on the belt casting machine.

[0152] Advantageously, the material strip can be compressed on the strip casting machine by means of the belt counter pressure.

[0153] This allows the material thickness of the material strip to be kept constant or even increased despite the material strip having cooled down, or at least the extent of any decrease in material thickness can be reduced.

[0154] Therefore, critical shrinkage of the material strip cooling on the strip casting machine can be advantageously counteracted, in particular by means of compression effects which can be achieved by means of the manipulation device on the material strip on the strip casting machine. Page 23 / 43

[0155] P80909DE

[0156] The strip casting machine and downstream processing devices can be advantageously decoupled from each other in terms of process technology if the material strip is conveyed more slowly in the conveying direction on a second drive roller unit than on and / or in the strip casting machine and / or than on the first drive roller unit before the material strip is fed to the at least one processing device.

[0157] Therefore, the strip casting machine and the at least one processing device can be decoupled from each other by means of at least one drive roller unit.

[0158] It is particularly advantageous if the strip casting machine and the at least one processing device are decoupled from each other with regard to their work processes by means of the strip reserve, with a continuous material strip.

[0159] Furthermore, the tension of the material strip between this second manipulation device and a processing device located further downstream, in particular a rolling device for rolling the material strip, can be variably adjusted by means of the second manipulation device.

[0160] One variant of the process is characterized by the fact that the belt speed of the material belt is temporarily reduced at least once, preferably twice, or in particular differently, downstream of the belt casting machine and upstream of the at least one processing device, before the material belt is subsequently fed to the at least one processing device.

[0161] The belt speed can be temporarily manipulated in a simple and precise manner from a process engineering perspective if the belt speed of the material belt is controlled by a single drive roller (page 24 / 43).

[0162] P80909DE is reduced once or twice by means of two drive roller units before the material strip is fed to the at least one processing device.

[0163] According to a further aspect of the invention, the problem is solved by using a drive roller unit driving a material belt to generate a belt reserve upstream of this drive roller unit and immediately downstream behind a belt casting machine, or between two drive roller units.

[0164] Advantageously, such a drive roller unit can be used to decouple a casting process taking place on the strip casting machine and a processing device downstream of this strip casting machine, thereby significantly improving the production of a material strip.

[0165] According to another aspect of the invention, the problem is solved by using a drive roller unit that drives a material belt to build up a belt counter-pressure on a belt casting machine.

[0166] This can advantageously counteract critical shrinkage of the material strip as it cools and solidifies on the strip casting machine.

[0167] Further advantages, details and features of the invention will also become apparent from the exemplary examples explained below.

[0168] Components which are at least essentially identical in their function in the individual figures may be marked with the same reference symbols, whereby the components do not have to be referenced and explained in all figures.

[0169] The drawing shows: Page 25 / 43

[0170] P80909DE

[0171] Figure 1: schematically a model view of a first plant for producing a continuously cast material strip with a strip casting machine and with a manipulation device arranged downstream for manipulating the strip speed of the material strip, by means of which a strip reserve can be provided between the strip casting machine and the manipulation device;

[0172] Figure 2: schematically a model view of an alternative plant for producing a continuously cast material strip with a strip casting machine and with a manipulation device arranged downstream for manipulating the strip speed of the material strip, by means of which a strip counter-pressure can be provided at the strip casting machine;

[0173] Figure 3: schematically a model view of another plant for producing a continuously cast material strip, in which the manipulation devices from Figures 1 and 2 are combined; and

[0174] Figure 4: schematically a model view of the further plant from Figure 3 according to a first possible combination with a first selection of downstream processing devices.

[0175] The first embodiment shown in Figure 1 with regard to a first plant 1 for producing a continuously cast material strip 2 has a conveying section 4 along which the material strip 2 is continuously conveyed forward in the conveying direction 6.

[0176] In this first embodiment, the system 1 includes a strip casting machine 8 for the initial forming of the material strip 2 (each only schematically indicated), wherein the material strip 2 is formed on side 26 / 43.

[0177] P80909DE

[0178] The conveyor route is only indicated in the area of ​​the strip casting machine 8.

[0179] The strip casting machine 8 is designed here, for example, as a caterpillar casting machine (not again specifically designated) and the strip casting machine 8 has a lower circulating conveying device 10 and an upper circulating conveying device 12, which together form the circulating mold in which the cast strip solidifies.

[0180] The lower circulating conveyor 10 comprises a lower endless circulating crawler track 10A with block elements 10B arranged thereon, wherein the lower endless circulating crawler track 10A is guided by two deflection and / or drive wheels I OC (referred to only by way of example).

[0181] Accordingly, the upper circulating conveyor 12 comprises an upper endless circulating crawler track 12A with block elements 12B arranged thereon, wherein the upper endless circulating crawler track 12A is guided by two deflection and / or drive wheels 12C.

[0182] The two crawler trains 10A and 12A each run at a peripheral speed v. R (only by way of example) around .

[0183] Between the two circulating conveying devices 10 and 12, a preferably variably adjustable casting gap 14 is formed, into which a molten material 16 is fed at the inlet side 8A of the belt casting machine 8, which is discharged from a melting vessel 20 into the casting gap 14 by means of a casting nozzle device 18.

[0184] The material melt used here, ze 16, is, for example, aluminum or an alloy thereof; however, the material melt can also be a non-ferrous material melt or the like. Page 27 / 43

[0185] P80909DE

[0186] The molten material 16 and the material strip 2 which gradually solidifies and cools further move through the belt casting machine 8 in the conveying direction 6 with the help of the moving block elements 10B and 12B, until the cast material strip 2 finally exits the belt casting machine 8 at the exit side 8B and can then be transferred, for example, to a roller conveyor 4A (only schematically referred to) of the conveying line 4.

[0187] The molten material ze 16 and the cast material strip 2 move within the casting gap 14 of the strip casting machine 8 at an initial velocity v z in conveying direction 6 forwards.

[0188] The initial velocity v is preferred z and the circumferential speed v R the endlessly circulating caterpillar trains 10A and 12B are identical, or have at most negligible speed differences to each other, as long as this is not desired for process engineering reasons.

[0189] The system 1 also includes a control device 22 for controlling and / or regulating system components, whereby wired or wireless connections between the control device 22 and system components of the system 1 are not explicitly shown.

[0190] Downstream of the strip casting machine 8 is a manipulation device 30A for manipulating the strip speed v Bof the material belt 2 arranged on the conveyor section 4, by means of which a belt reserve 32 (not explicitly shown) of material belt 2 can be generated and provided between the belt casting machine 8 and this handling device 30A, insofar as a device for generating a belt reserve 32 of belt material 2. Page 28 / 43

[0191] P80909DE

[0192] The manipulation device 30A is primarily speed-dependent in order to generate and / or provide the band reserve 32.

[0193] With the help of this belt reserve 32 provided by the manipulation device 30A, the belt casting machine 8 can be very well decoupled from work processes of processing devices 64 arranged further downstream of the manipulation device 30A (see Figure 4).

[0194] In particular, the manipulation device 30A can also be used without difficulty to make a belt tension 33 on the material belt 2 further downstream of the manipulation device 30A variably adjustable due to the upstream belt reserve 32, especially without the risk of a belt break caused by this.

[0195] The manipulation device 30A is arranged at a distance 34 from the belt casting machine 8, whereby a construction space 36 created thereby on the conveyor line 6 is free of machining devices 64.

[0196] In order to handle the belt reserve 32 with particular operational reliability within the available installation space 36, a conveyor section 38 of the installation space 36 is designed to be at least partially lowerable. This allows, for example, a depression into which the material belt 2 can lower itself, deviating from the roller conveyor level 4B of the conveyor section 4.

[0197] The manipulation device 30A includes a drive roller unit 40 for driving the material belt 2 .

[0198] The drive roller unit 40 can actively drive the material belt 2 forward in the conveying direction 6 on the one hand, and on the other hand page 29 / 43

[0199] P80909DE can also actively brake, at least temporarily, in order to generate the band reserve 32 (not explicitly shown) upstream of the manipulation device 30A.

[0200] The drive roller unit 40 has a lower drive roller 40A and an upper drive roller 40B, wherein the two drive rollers 40A and 40B can be variably adjusted with respect to their drive roller distance 44 to each other by means of a distance adjustment device not shown here.

[0201] The drive roller unit 40 has a speed-variable drive device 46 for driving the drive rollers 40A, 40B and / or a torque-variable drive device 47 for driving the drive rollers 40A, 40B.

[0202] In this respect, the manipulation device 30A and / or its drive roller unit 40 for manipulating the belt tension 33 downstream of the manipulation device 30A and for providing the belt reserve 32 upstream of the manipulation device 30A has an actuator 48 for the drive devices 46 and / or 47.

[0203] To provide the belt reserve 32 and / or the belt tension 33, the drive rollers 40A and 40B are rotated at a drive roller circumferential speed v T (shown only as an example) operated, which is temporarily lower than the initial velocity v z and / or the circumferential speed v R the crawler trains 10A and 12A.

[0204] The drive rollers 40A and 40B are feed devices 50, in particular roller-shaped feed devices 50, which may preferably be selected depending on the material of the specifically cast material strip 2.

[0205] According to the representation shown in Figure 2, further

[0206] An example is a system 100 for manufacturing a page 30 / 43

[0207] P80909DE shows a continuously cast material strip 2, which is similar to the system 1 shown in Figure 1. Therefore, only the essential differences between system 1 (see Figure 1) and system 100 are described below with regard to this further embodiment, in order to avoid repetition.

[0208] In plant 100, downstream of the strip casting machine 8, there is a further manipulation device 30B for manipulating the strip speed v. Bof the material belt 2 on the conveyor line 4, by means of which an increased belt back pressure 52 (shown here only schematically) can be generated and provided between the belt casting machine 8 and the further handling device 30B with respect to the material belt 2.

[0209] More precisely, the further manipulation device 30B is set up and controlled in such a way that an increased belt back pressure 52 can be provided, in particular at the exit side 8B of the belt casting machine 8 and, if necessary, at least partially further upstream into the casting gap 14, in order to counteract shrinkage effects when the material belt 2 that has just been cast cools down.

[0210] This is particularly advantageous for thin cast material strips 2 in order to counteract unfavorable material structure structures.

[0211] To reduce the risk of critical folding of the material strip 2 between the strip casting machine 8 and the further handling device 30B, it is advantageous for building up and providing the desired strip back pressure 52 at the strip casting machine 8 if the further handling device 30B is positioned downstream of the strip casting machine 8 at a smaller distance 54 relative to the further handling device 30B than the distance 34 with regard to the first embodiment. Page 31 / 43

[0212] P80909DE

[0213] This results in a smaller installation space 56 and / or a smaller conveyor section 58 between the strip casting machine 8 and the further handling device 30B. The installation space 56 is also free of other processing devices here.

[0214] To generate and / or provide the belt back pressure 52, the further manipulation device 30B is primarily controlled by torque.

[0215] The belt counterpressure 52 acts in the opposite direction to the conveying direction 6.

[0216] According to the further embodiment shown in Figure 3, a system 200 for producing a continuously cast material strip 2 is shown, in which the two manipulation devices 30A and 30B are used to manipulate the strip speed v respectively. B as an arrangement 60 together downstream of the strip casting machine 8 are .

[0217] In other words, this means that the further manipulation device 30B is arranged between the strip casting machine 8 and the manipulation device 30A.

[0218] The arrangement 60 is described here as a compact cascade device 62 consisting of two manipulation devices 30A and 30B for manipulating the respective belt speed v. B integrated into plant 200.

[0219] A space 36 is provided between the two manipulation devices 30A and 30B, which corresponds to the space 36 from the first embodiment (Annex 1). Page 32 / 43

[0220] P80909DE

[0221] Therefore, in this construction space 36, a conveyor section 38 is again designed to be at least partially lowerable in order to support the provision of the belt reserve 32 between the two manipulation devices 30A and 30B, while upstream of the manipulation device 30A a belt counter-pressure 52 can be built up and provided against the belt casting machine 8.

[0222] In any case, the two construction spaces 36 and 56 remain free of processing devices for processing the material strip 2.

[0223] Regarding further functionalities of the now two manipulation devices 30A and 30B connected in series, reference is made to the description of the exemplary embodiments in Figures 1 and 2 in order to avoid repetition here as well.

[0224] According to the further embodiment shown in Figure 4, a plant 300 for producing a continuously cast material strip 2 is shown with a variety of different processing devices 64, wherein the plant 300 comprises the plant configuration of the plant 200, i.e. the arrangement 60 with the two manipulation devices 30B and 30A arranged directly one behind the other.

[0225] In this arrangement, a brushing device 64B and a rolling device 64A are arranged as a first processing device 64 immediately behind the arrangement 60 and / or behind the manipulation device 30A for providing the strip reserve 32, wherein the rolling device 64A has a hot rolling stand (not shown separately) for hot rolling the material strip 2 following the casting process with the strip casting machine 8 without intermediate processing. Page 33 / 43

[0226] P80909DE

[0227] Further downstream behind the rolling device 64A, a cooling device (not shown) can be arranged on the conveyor line 6 as a further processing device 64, followed by a belt shear device 64C as yet another further processing device 64.

[0228] At the end of the conveyor section 6 of the system 300, a reeling device 66 is arranged, on which the material strip 2 is wound up, so that it can be readily provided for further processing independently of the system 300.

[0229] Page 34 / 43

[0230] P80909DE

[0231] Reference symbol list

[0232] 1 Annex

[0233] 2 Material tape

[0234] 4 Conveyor section

[0235] 4A Roller walkway

[0236] 4B Roller walkway level

[0237] 6 Direction of conveyance

[0238] 8 strip casting machine

[0239] 8A Entrance side or entrance-side

[0240] 8B Exit side or exit-side

[0241] 10 lower circulating conveyor 10A lower endless circulating crawler train 10B lower block elements

[0242] I OC lower deflection and / or drive wheels

[0243] 12 upper circulating conveyor 12A upper endless circulating crawler conveyor 12B upper block elements

[0244] 12C upper deflection and / or drive wheels

[0245] 14 Pouring gap

[0246] 16 material melt

[0247] 18 Pouring nozzle assembly

[0248] 20 melting pots

[0249] 22 Control unit

[0250] 30A manipulation device

[0251] 30B further manipulation device

[0252] 32 Band reserve

[0253] 33 Band pull

[0254] 34 distance

[0255] 36 Construction space

[0256] 38 Conveyor section

[0257] 40 drive roller unit

[0258] 40A lower drive roller

[0259] 40B upper drive roller

[0260] 44 Drive roller spacing Page 35 / 43

[0261] P80909DE

[0262] 46 variable speed drive unit

[0263] 47 torque variable drive unit

[0264] 48 Actuator

[0265] 50 feed devices

[0266] 52 Band counterpressure

[0267] 54 smaller distance

[0268] 56 smaller installation space

[0269] 58 smaller conveyor section

[0270] 60 Arrangement

[0271] 62 Cascade device

[0272] 64 machining devices

[0273] 64A rolling device

[0274] 64B Brush attachment

[0275] 64C Band shear device

[0276] 66 Reel device

[0277] 100 more facilities

[0278] 200 more facilities

[0279] 300 more facilities v R Peripheral speed of crawler trains / Working speed v z Initial velocity v B Band speed vT drive roller peripheral speed

Claims

Page 36 / 43 P80909DE Patent claims 1. Plant (1; 100; 200; 300) for producing a continuously cast material strip (2) conveyed along a conveying section (4) in the conveying direction (6), comprising a continuously operating strip casting machine (8) for initial forming of the material strip (2), wherein downstream of the strip casting machine (8) is a manipulation device (30A; 30B) for manipulating the strip speed (v B ) is arranged by means of which a belt reserve (32) is provided between the belt casting machine (8) and the handling device (30A; 30B) and / or a belt back pressure is provided (52) are available at the strip casting machine (8).

2. Plant (1; 100; 200; 300) according to claim 1, characterized in that a further manipulation device (30A; 30B) for manipulating the strip speed (v) is connected between the strip casting machine (8) and the manipulation device (30A; 30B). B ) is arranged.

3. System (1; 100; 200; 300) according to claim 1 or 2, characterized in that the system (1; 100; 200; 300) comprises a cascade device (62) consisting of two manipulation devices (30A; 30B).

4. Plant (1; 100; 200; 300) according to one of claims 1 to 3, characterized in that a construction space (36; 56) and / or a conveyor section (38; 58) between the strip casting machine (8) and a handling device (30A; 30B) and / or a construction space (36) and / or a conveyor section (38) between two handling devices (30A; 30B) arranged one behind the other in the conveying direction (6) are free of processing devices (64) for processing the material strip (2).

5. Plant (1; 100; 200; 300) according to one of claims 1 to 4, characterized in that a manipulation device (30A; 30B) is located opposite the strip casting machine (8) and / or opposite a -36- Page 37 / 43 P80909DE further manipulation device (30A; 30B) is arranged with a distance (34; 54) of greater than or equal to 1,500 mm, preferably greater than or equal to 2,000 mm and particularly preferably greater than or equal to 2,500 mm, and / or with a distance (34; 54) of less than or equal to 4,000 mm, preferably less than or equal to 3,500 mm and particularly preferably less than or equal to 3,000 mm.

6. Plant (1; 100; 200; 300) according to one of claims 1 to 5, characterized in that a lowerable conveying section (38) is arranged upstream of a manipulation device (30A; 30B).

7. System (1; 100; 200; 300) according to one of claims 1 to 6, characterized in that a manipulation device (30A; 30B) depending on a working speed (v R ) , in particular a casting speed, the belt casting machine (8) , and / or a rotational speed (v R) a conveying device (10, 12) of the strip casting machine (8) is controlled.

8. Plant (1; 100; 200; 300) according to one of claims 1 to 7, characterized in that the manipulation device (30A; 30B) has feed devices (50), in particular roller-shaped feed devices (50), which are configured to advance in the conveying direction (6), in particular an aluminum material strip or another non-ferrous material strip, such as a Mg, Zn, Sn, Cu, Pb material strip or alloys thereof.

9. System (1; 100; 200; 300) according to one of claims 1 to 8, characterized in that a manipulation device (30A; 30B) is controllable depending on torque and / or speed.

10. Plant (1; 100; 200; 300) according to one of claims 1 to 9, characterized in that a manipulation device (30A; 30B) has a drive roller unit (40) for driving the material belt (2). -37- Page 38 / 43 P80909DE 11. Plant (1; 100; 200; 300) according to claim 10, characterized in that the drive roller unit (40) has at least one lower drive roller (40A) and at least one upper drive roller (40B), wherein the drive roller unit (40) has a distance adjustment device by means of which a distance (44) between the at least one lower drive roller (40A) and the at least one upper drive roller (40B) can be adjusted.

12. Plant (1; 100; 200; 300) according to claim 10 or 11, characterized in that the drive roller unit (40) has at least one actuating element (48) for influencing a belt back pressure (52) and / or a belt tension (33) of the material belt (2).

13. Plant (1; 100; 200; 300) according to one of claims 10 to 12, characterized in that the drive roller unit (40) has a speed-variable drive device (46) for driving at least one drive roller (40A, 40B) of the drive roller unit (40) and / or a torque-variable drive device (47) for driving at least one drive roller (40A, 40B) of the drive roller unit (40).

14. Plant (1; 100; 200; 300) according to one of claims 10 to 13, characterized in that a circumferential speed (v T ) of a drive roller (40A, 40B) of the drive roller unit (40) 99.8% or less of the circumferential speed (v R ) of a circulating conveying device (10, 12) on the strip casting machine (8) is, preferably 99.6% or less and particularly preferably 99% or less, and / or a peripheral speed (v T ) of a drive roller (40A, 40B) of the drive roller unit (40) 95% or more of the circumferential speed (vR ) of the circulating conveying device (10, 12) on the strip casting machine (8) is preferably 96% or more and particularly preferably 97% or more .

15. Plant (1; 100; 200; 300) according to one of claims 1 to 14, characterized in that a manipulation device (30A; 30B) for manipulating the belt speed (v B ) , by means of Page 39 / 43 P80909DE which can provide an increased band back pressure (52) at the band casting machine (8) relative to the band casting machine (8) depending on a material band thickness determined at the band casting machine (8), in particular at a casting nozzle device (18) of the band casting machine (8).

16. Plant (1; 100; 200; 300) according to one of claims 1 to 15, characterized in that a manipulation device (30A; 30B) for manipulating the belt speed (v B) depending on a further manipulation device (30A; 30B) for manipulating the belt speed (v B ) is controllable.

17. Plant (1; 100; 200; 300) according to one of claims 1 to 16, characterized in that downstream of a manipulation device (30A; 30B) for manipulating the belt speed (v B ) , by means of which a strip reserve (32) can be provided, a rolling device (64A) for rolling the material strip (2) is arranged.

18. Plant (1; 100; 200; 300) according to one of claims 1 to 17, characterized in that the strip casting machine (8) comprises a strip casting machine with a circulating mold, preferably in the form of a circulating strip or a caterpillar.

19. Plant (1; 100; 200; 300) according to one of claims 1 to 18, characterized in that the strip casting machine (8) has a strip thickness casting capacity of greater than or equal to 5 mm, preferably greater than or equal to 7.5 mm and particularly preferably greater than or equal to 10 mm, and / or has a strip thickness casting capacity of less than or equal to 40 mm, preferably less than or equal to 30 mm and particularly preferably less than or equal to 20 mm and most preferably less than or equal to 10 mm.

20. Plant (1; 100; 200; 300) according to one of claims 1 to 19, characterized in that the strip casting machine (8) has a strip casting capacity of greater than or equal to 100 mm, Page 40 / 43 P80909DE preferably of greater than or equal to 500 mm and particularly preferably of greater than or equal to 1,000 mm, and / or has a strip casting capacity of less than or equal to 2,800 mm, preferably of less than or equal to 2,300 mm and particularly preferably of less than or equal to 1,800 mm and most particularly preferably of less than or equal to 1,500 mm.

21. Plant (1; 100; 200; 300) according to one of claims 1 to 20, characterized in that the strip casting machine (8) has a strip casting speed of greater than or equal to 2 m / min, preferably greater than or equal to 5 m / min and particularly preferably greater than or equal to 8 m / min, and / or has a strip casting speed of less than or equal to 15 m / min, preferably less than or equal to 12 m / min and particularly preferably less than or equal to 10 m / min.

22. Arrangement (60) comprising a first manipulation device (30A; 30B) for manipulating a belt speed (v B) a material belt (2) moving along a conveyor line (4) in the conveying direction (6) and from a second manipulation device (30A; 30B) to manipulate a tape speed (v B ) this material strip (2) , characterized in that the arrangement (60) is arranged on the conveying line (4) between a strip casting machine (8) for continuously casting the material strip (2) and a processing device (64) for processing this continuously cast material strip (2).

23. Arrangement (60) according to claim 22, characterized in that a space (36) between the first and the second manipulation device (30A; 30B) is free of a processing device (64) for processing the material strip (2).

24. Arrangement (60) according to claim 22 or 23, characterized in that the manipulation devices (30A; 30B) each have a drive roller unit (40) for driving the material belt (2). Page 41 / 43 P80909DE 25. Method for producing a continuously cast material strip (2) conveyed along a conveying path (4) in the conveying direction (6), wherein • the material strip (2) is continuously cast using a strip casting machine (8), • the material belt (2) is conveyed forward in the conveying direction (6), preferably continuously, • the material strip (2) is further downstream of the strip casting machine (8) by means of at least one processing device (64), in particular a hot rolling device (64A), • the material belt (2) downstream of the belt casting machine (8) , but upstream of the at least one processing device (64) is conveyed at least once at such a slower speed in the conveying direction (6) in certain sections, • that a strip reserve (32) is generated between the strip casting machine (8) and the at least one processing device (64) with respect to the material strip (2), and / or • that an increased band back pressure (52) is generated at the band casting machine (8).

26. Method according to claim 25, characterized in that the material strip (2) is conveyed forward more slowly on a first drive roller unit (40) than on and / or in the strip casting machine (8) before the material strip (2) is fed to the at least one processing device (64).

27. Method according to claim 25 or 26, characterized in that the material strip (2) is conveyed more slowly in the conveying direction (6) on a second drive roller unit (40) than on and / or in the strip casting machine (8) and / or than on the first drive roller unit (40) before the material strip (2) is fed to the at least one processing device (64). Page 42 / 43 P80909DE 28. Use of a drive roller unit (40) driving a material belt (2) to generate a belt reserve (32) upstream of this drive roller unit (40) and immediately downstream behind a belt casting machine (8) , or between two drive roller units (40) .

29. Use of a drive roller unit (40) driving a material belt (2) to build up a belt counter-pressure (52) on a belt casting machine (8) .

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