WO2017162846A1

WO2017162846A1 - Method for guiding steel strip in a continuously operating press, and system

Info

Publication number: WO2017162846A1
Application number: PCT/EP2017/057032
Authority: WO
Inventors: Gernot Von Haas
Original assignee: Dieffenbacher GmbH Maschinen- und Anlagenbau
Priority date: 2016-03-24
Filing date: 2017-03-24
Publication date: 2017-09-28
Also published as: DE102016105565B4; DE102016105565A1

Abstract

A method is specified for guiding steel strip in a continuously operating press (7) for producing, in particular lignocellulosic, material boards such as chipboards, fibreboards, OSB boards, plywood panels or plastic sheets, with flexible, endless steel strips (11) that transmit the applied pressure and pull the material to be pressed through the press (7), wherein a mat of material to be pressed (9, 9') is introduced between the steel strips (11) into a press nip (22) of the continuously operating press (7), and the steel strips (11) are guided via drive drums (21) and deflection drums (10), wherein the course of the steel strips (11) out of the longitudinal axis (I-I) is measured by means of strip path sensors (27) and is adjusted into the longitudinal axis (I-I) of the continuously operating press (7) with a strip path regulating device. The method furthermore provides for the readjustment of the steel strips (11) into the longitudinal axis (I-I) of the continuously operating press (7) to take place in that at least one of the trimming devices (5) for trimming the peripheries of the mat of material to be pressed (9, 9') is adjusted in a transverse direction to the production direction (28). Furthermore, the invention relates to a system for producing material boards.

Description

Method for steel strip guide

in a continuously working press and plant

The invention relates to a method for steel strip guide in a

Continuously operating press according to the preamble of claim 1 and a plant for the production of, in particular lignocellulose-containing, material plates such as chipboard, fiberboard, OSB boards, plywood boards or plastic sheets according to claim 6.

In the production of material plates, especially wood-based panels from chips, fibers and / or chips or the production of other plates of lignocellulosic materials or plastic plates increasingly continuous presses are used in the industry.

The known continuously operating presses usually already have a high availability. Analyzing the causes of unavailability after an ABC analysis, one finds that besides the routine maintenance and servicing times, which make up the bulk of the unavailability, there are also changes to other products, problems in mat diffusion,

Temperature fluctuations or bleeding of the steel strip or the rolling rods can lead to stoppages. Causes of a running of the steel strip and / or the rolling rods are, inter alia, disturbances that in the pressing area on the

Steel bands act. Such disturbances can arise, for example, due to fluctuations in the scattering weight. Density differences in the material to be pressed, which lead to asymmetric force profiles in the continuously operating press, that is to say one-sided scattering increases, for example, lead to a specific pressure increase on this side, which leads to increased frictional forces in the system steel strip rolling bar rolling surfaces. The frictional forces exert a steering effect on the steel bands in the form that one or both steel bands migrate to the higher specific pressure side.

In order to counteract this, regulation of the strip running is usually provided, for which a large number of different principles of action have already been proposed in the prior art. Thus, from the document DE 199 31 176 A1 discloses to provide a regulation of the tape run by means of the drive or outlet drums and one or more Bandregeiwalzen in the return system of the continuously operating presses. About the inclination of the outlet drums or drive drums in the horizontal plane by steep drives the belt run counteracted to keep the steel strip so in the allowable range of the continuously operating press. By the

Tilting of the drive current drum act Rückstelikräfte on the steel strip. However, the steel bands in the pressing area are massively clamped by the high pressing pressure, so that the partial forces applied in the outlet have only a limited effect on the pressing area. With increasingly longer continuously working presses the effectiveness of the inclination of the

Driving drums as a control mechanism ever lower and thus also fades the ability to compensate for the system imposed disturbances or

counteract.

From the document DE 40 17 791 C2 is also known, the regulation of

Steel strip running and the provision of the band profile make by the fact that the axis adjustment on a longitudinal side by an angle on the circulating and / or the drive drum axis at least at the beginning of an adjustment of a frame part takes place by the Kurzhubzylinder in the high pressure region from a horizontal position in such an inclined position is moved so that in the inlet direction left or right a pressure or path profile is adjusted. In this case, an asymmetrical pressure profile in the pressed material is produced by a deliberate skewing of the frames and thus causes a steering effect on the steel strip, which is identical to the mode of action with the mechanism described above. In this case, the heating plate is raised only partially on one side in normal operation. Built-in tape sensors in the

Pressing area reproduce the current position of the steel strip in the press and serve as an input signal for controlling the heating plate tilt. With this procedure, even very long, continuously operating presses can be safely installed

Tape run are mastered. However, this method also has disadvantages. The most serious is the fact that the chipboard tolerances are adversely affected by the one-sided lifting of the heating plates. Other plate properties, such as the transverse tensile strength or the density profile, are also affected or may occur asymmetrically across the plate width. In addition, the effectiveness is not always satisfactory. If the heating plate is raised in certain areas, in subsequent areas in which the heating plate is parallel again, on the previously raised side, an excessive specific pressing pressure, which counteracts the previously achieved band deflection effect, is produced. It can therefore not be used as a permanent control mechanism, but can only be used for emergency belt control in extreme situations.

The document EP 1 479 510 A2 provides for a provision of the steel belts in the longitudinal axis of a continuously operating press in that one of the longitudinal sides of the pre-press with the pressure rollers located therein is lifted for a limited time by means of hydraulic actuators, so that in cross-section

Pressgutmatte forms a deviating from the plane parallelism cross-sectional shape and adjusts the higher longitudinal side of the pressed material a higher one-sided back pressure on the inlet plate of Keiiverdichtereinlaufs until the provision of the steel strip to be controlled is completed. For this purpose, the Rollstangen- and / or

Steel band in the press nip measured by tape sensors and a

Bandiaufregeleinrichtung controls the actuators to adjust the longitudinal side of the pre-press at an angle and retract with the one-sided higher Pressgutmatte in the wedge compressor and thus act on the steel strip conveyor of the press. By a conscious inclination of a longitudinal side of the pre-press makes a strong impact on the tape running of the steel strip noticeable and a provision of the running steel strip can be adjusted. This method has the advantage that no or only marginal negative impact on the quality or the

Material properties and dimensional accuracy of the finished plate by the

Resetting the steel belts occurs. However, there are several disadvantages with this method as well.

These disadvantages are essentially due to the fact that the control intervention takes place at the site of the pre-press, and thus in a location that is far upstream of the press. Here, on the one hand, the length of the pre-press itself must be taken into account, depending on

Execution of the pre-press, for example, 10 m or even 15 m may be, as well as the length of the area between pre-press and press inlet, which may be more 5 m to 20 m and more depending, for example on whether there are other devices such as a microwave preheating arranged is the alone a length between 10 m and 20 m can take. For a production speed of, for example, 1200 mm / s, as is known and customary in some systems for the production of chipboard, fiberboard or OSB wood-based panels, this can be an additional dead time of the regulation of

for example 12 s (for a total length of 15 m), or 25 s (for a

Total length of 30 m) and more, so that only a relatively slow control is possible and therefore can only be responded to a band course correspondingly slow. This can be very problematic, especially for presses for MDF or OSB wood board production, which have a length of over 50 m and a production width of 4 feet or about 1200 mm, because of the very narrow Ribbons and the great length the steel bands are very sensitive to disturbances and tend very fast to the course. In particular, in the start-up operation, when the pressed material mat is retracted into the otherwise empty press, this can therefore lead within a short time to an increased band profile, which is so large that the corresponding limit switches are actuated and an emergency stop of the presses can be triggered.

Another problem that arises in practice, is that due to the many possible configurations of the pre-press itself, as well as the variety of optional existing or non-existent devices between the pre-press and the continuous press, almost every system a different Distance between the pre-press and the inlet of the continuous press so that the corresponding dead time is different for almost every system. It is therefore necessary for each (or almost every) installation to have its own set of tape running controls, without the experience gained on other equipment and the controller settings that have been found to be optimal or at least practicable for that equipment. In practice, this means an increased expenditure of personnel and time in the commissioning of a newly built system, which is associated with corresponding costs.

It is therefore an object of the present invention to overcome the above drawbacks and to allow improved recovery of the steel strip extending from the longitudinal axis and / or the rolling bars in the pressing area. It is a further object of the present invention to provide improved recovery of the longitudinally extending steel strip and / or the roll bars in the

To enable pressing area, which can be realized inexpensively and easily.

These and other objects are achieved with a method and apparatus as defined in the independent claims. Further preferred embodiments are set forth in the dependent claims.

As a solution, a method is given for steel strip guide in a continuous press for the production of, in particular

Lignocellulosehaitigen, material plates such as chipboard, fiberboard, OSB boards, plywood or plastic plates, with the pressing pressure and the material to be pressed through the press pulling flexible, endless steel belts, a pressed material mat is introduced between the steel belts in a press nip of the continuous press , the steel bands over

Drive drums and idler pulleys are performed, the course of the

Steel strips are measured from the longitudinal axis by means of one or more tape running sensors and adjusted with a strip running control device in the longitudinal axis of the continuously operating press. The provision of steel straps in the

The longitudinal axis of the continuously operating press is thereby effected in that at least one of the trimming devices is adjusted for trimming the edges of the mat of the pressed material mat in a transverse direction to the production direction.

As a further solution, a plant for the production of, in particular lignocellulosehaitigen, Werkstoffpiatten as particleboard, fiberboard, OSB boards, plywood boards or plastic plates is given, comprising: a continuous press with flexible, endless steel belts for transmitting the

Pressing pressure and for drawing the material to be pressed by the press, wherein the steel belts are guided by drive drums and idler pulleys and define a press nip; one or more tape sensors for measuring the

Course of the steel strips from a longitudinal axis of the continuously operating press; and a belt running device for adjusting the steel belts in the longitudinal axis. The system further comprises at least two trimming devices for trimming the mat edges of the pressed material mat, wherein at least one of the trimming devices by means of at least one adjusting device is adjustable in a transverse direction, and the tape running control device is arranged to control the at least one adjusting device to adjust the at least one of the trimming devices in the transverse direction to the production direction, to regulate the steel strips in the longitudinal axis.

The invention proposes, in the case of a course of the steel strips, to offset the position of the press material mat relative to the longitudinal axis of the continuously operating press with the aid of a lateral adjustment of the trimming devices in the transverse direction. The Pressgutmatte therefore no longer runs centrally or symmetrically to the longitudinal axis of the continuously operating press in this, and there is a to the longitudinal axis of the continuously operating press asymmetric loading of the continuously operating press, the corresponding asymmetric

Forces profiles in the continuous press leads. That is, an offset of the pressed material mat in the transverse direction to one side leads to increased frictional forces in the system of steel belt rolling rod rolling surfaces on this side. The frictional forces exert a steering effect on the steel bands in the form that one or both steel bands on the side with the larger load, that is, the side to which the

Pressgutmatte is shifted, wander or run. With the lateral offset of the Pressgutmatte in the transverse direction can be counteracted so the band profile to keep the steel strip in the allowable range of the continuously operating press.

Of particular advantage here is that the Besäumungseinrichtungen are usually arranged very close or immediately before the inlet of the continuously operating press, for example, at a distance of less than 10 m, 7 m, 5 m, or 3 m, so that a correspondingly small Regelstotzeit results, which allows a very rapid regulation. This makes it possible for the invention

Bandlaufregelung to work in an enlarged range of application, and in particular for larger gradients, with fast tendency to tread

Presses such as long and / or narrow presses, and to ensure a safe control of the tape during startup when entering a Pressgutmatte.

The arrangement or position of the trimming devices is usually relative to the inlet of the continuously operating press for the same or comparable press types similar or largely similar, so that gained in the past

Experience with comparable presses easily transferred. This represents a significant facilitation in the commissioning of newly built facilities.

Another advantage is that no change in the shape of the Pressgutmatte done by this type of tape running control, that is, the pressed material mat is formed with a consistently constant height and compression and introduced into the continuous press, so that a negligible or even no negative influence on the quality or the material properties and the

Dimensional accuracy of the finished plate by the provision of steel straps occurs or even to be feared would be.

Also, this type of tape running control is not subject to any time limit in the use of the scheme. In other words, this type of Bandiaufregelung without any disadvantages to fear permanently in use. For example, minor alignment errors, such as lateral or angular misalignment, between the longitudinal axis of the continuous press and the longitudinal axis of the forming belt, which would otherwise cause the steel belts to run in operation, and which have heretofore always encountered highly accurate alignment had to be compensated for by the use of the stripline control described herein.

It is preferably provided that for the provision of the steel strips in the longitudinal axis of the continuously operating press, the trimming devices are adjusted in the transverse direction to the production direction. More preferably, the adjustment takes place in such a way that a distance between the trimming devices is kept constant.

The trimming devices can be designed as Besäumsägen or as trimming cutter.

The tape travel controller is preferably implemented by a PID controller. But also other regulators, which the tape running control device via a

Control algorithm can control are conceivable. Preferably, the trimming devices are arranged at a distance of less than 10 m, preferably less than 7 m, more preferably less than 5 m, most preferably less than 3 m in front of an inlet region of the continuously operating press. Thus, a short controlled system is achieved, which reduces the regular dead time to a minimum.

Alternatively or in combination, the trimming devices are adjustable in the transverse direction to the production direction, wherein the one adjusting device allows a simultaneous adjustment of the trimming devices, wherein preferably the adjustment is made so that a distance between the trimming devices is kept constant. Due to the constant width of the compressed pressed material mat is not affected in their dimensions and can be handled with the other plates as usual.

In a preferred embodiment, the trimming devices are adjustable in the transverse direction to the production direction, wherein at least two adjusting devices are provided, each of which can adjust one of the trimming devices in the transverse direction to the production direction, wherein preferably the adjustment is made so that a distance between the trimming devices is kept constant ,

Preferably, the facility is set up to carry out a procedure as indicated above.

The scattering of the Pressgutmatte 9 can be made so that it is spread wider than the width of the steel strip. Thus, it can be ensured that trimming of the mat edges is always possible and thus the course of the steel strip can be influenced since the pressed material mat may have at most the width of the steel strip when entering the press.

Further advantageous measures and embodiments of the subject matter of

The invention will become apparent from the dependent claims and the following description with the drawings.

Show it:

Fig. 1 is a schematic plan view of an exemplary plant for the production of Material boards such as chipboard, fiberboard, OSB boards and plywood boards or plastic boards,

2 is a schematic side view of an enlarged view of a system according to FIG.

1 from the pre-press to the continuous press,

3 shows an exemplary embodiment of trimming devices; and

Fig. 4 is a continuously operating press in plan view.

As shown in FIGS. 1 to 4 is in an exemplary plant for the production of material boards such as chipboard, fiberboard, OSB boards, plywood boards or plastic plates a Pressgutmatte 9 by means of one or more

Scattering machines 1 scattered on a forming belt 8 and thereby guided in the direction of production 28 to the continuously operating press 7 out. The spreading machine 1 can scatter a pressed material mat 9, which can also be wider than the width of the steel strip 1 1 of a subsequent press 7. The scattered pressed material mat 9 can pass through a belt scale 2 for checking the scattering quality of the spreading machines 1 and an optional pre-press 3 for precompression of the pressed material mat 9. After the pre-press 3, the pre-compressed press material mat 9 can be examined with a metal detector 4 for foreign bodies. Optionally at this point also a

Microwave preheating installed. Subsequently, the pressed material mat 9 passes through a trimming area, in which the pressed material mat 9 is trimmed at its lateral edges of the mat by trimming devices 5 in a manner known per se, and a

Abwurfbereich 18 a discharge bunker 6. To separate the trimmed Pressgutmatte 9 'for a discharge, a separator 20 (in Fig. 2 for the sake of clarity, not shown) may be provided. During production, the

Shedding area 18 bridged by means of a transfer nose 16 and the forming belt 8. As a rule, between the forming belt 8 and the continuously operating press 7 there is still an intermediate belt 19 which transfers the trimmed press material mat 9 'to the continuously operating press 7. In the press 7 is the edged

Pressgutmatte 9 'pressed using pressure and heat to a material plate. This is done by means of a continuous, as

Double belt press running press 7, with top and bottom arranged endless circulating steel bands 1 1, which are guided around guide drums 10. The

Steel belts 1 1 form a press nip 22, in which the trimmed Pressgutmatte 9 'is pressed. For rolling support of the steel strips 1 1 can be arranged between the heated press plates 13 and the steel strips 1 1 a roll bar circulation 12. The press 7 is followed by a final production (not shown).

The trimming devices 5 are shown in greater detail in FIG. As shown in Fig. 3, the trimming devices 5 are in this embodiment as

Besäumsägen running, each trimming device 5 has a saw blade 5a, which is driven by a drive 5b to trim a respective lateral longitudinal edge of the pressed material mat 9. In this case, side strips are separated from the press material mat 9, so that the trimmed press material mat 9 'assumes a desired width b in a transverse direction transversely to the production direction 28. The trimming devices 5 are usually arranged and adjusted so that normally the trimmed pressed material mat 9 'centered, that is, is symmetrical to an ideal position, which is indicated in Fig. 3 by the reference numeral 26. The ideal position 26 corresponds to the longitudinal axis L-l of the continuously operating press 7, that is, if the trimmed Pressgutmatte 9a on the forming belt 8 in the middle or

is symmetrical to the ideal position 26, then the trimmed Pressgutmatte 9 'of the continuously operating press 7 is supplied so that it is also in the continuous press 7 centered or symmetrical to the longitudinal axis L-l of the continuously operating press 7.

As can also be seen in FIG. 3, in this embodiment, the

Trimming devices 5 attached to a common carriage 24, the in

Linear guides 23 is mounted and guided, so that the carriage 24 can be adjusted by an adjusting device 25 in the transverse direction transversely to the direction of production 28. Therefore, if the carriage 24 is moved in the transverse direction, then both trimming devices 5 are also moved in the transverse direction, as indicated by the arrows in FIG. 3, which results in that the trimming of the pressed material mat 9 is no longer symmetrical to the ideal position 26 but with a corresponding lateral offset to the ideal position 26 in the transverse direction to the production direction 28.

The control of the adjusting device 25 is effected by a belt running control device (not shown), which receives measurement signals from arranged on the continuous press 7 tape running sensors 27. The strip running sensors 27 can preferably be arranged at the edges of the steel strips 1 1 and contact them to detect a course of the steel strips 1 1. The actual measured values of the

Tape running sensors 27 are evaluated by the tape running control device and based on a control algorithm, which is implemented by the belt running controller, a control signal is determined, with which the adjusting device 25 is driven to bring about a determined by the control algorithm offset of the press material mat 9 in the transverse direction to the production direction 28.

For example, if the tape running sensors 27 show that the steel belts 11 have a course to the right in the direction of production 28, the

Actuator 25 so controlled that the carriage 24, and with this the

Trimming devices 5, seen in the direction of production 28 in this regard

opposite direction are shifted to the left. The trimmed pressed material mat 9 'is hereby also adjusted eccentrically to the ideal position 26 by the corresponding offset, and thus off-center to the longitudinal axis L-l of the press 7 laterally. As a result, in the press 7 this results in a correspondingly asymmetrical load in the press nip 22 due to the eccentrically introduced edged pressed material mat 9 '. The steel bands 1 1 run to the side with higher load. In this way, the steel strip course is counteracted with the one-sided laterally offset edged pressed material mat 9 '.

It has been found in experiments that in most cases and plants a setting range or maximum lateral offset of +/- 10 mm relative to the ideal position 26 is sufficient to cause a safe return of the steel strips 1 1.

In this way, a sensitive steel strip running control is made possible, wherein the deferral of the steel strips 1 1 in the longitudinal axis L-L according to the invention by a laterally offset in the transverse direction trimming of the pressed material mat 9 takes place.

While a preferred embodiment has been described above, this is merely illustrative and not restrictive, and various other configurations may be practiced. Thus, the trimming devices 5 can also be designed as trimming cutters.

It is also possible, instead of mechanically connecting the trimming devices 5, such as by the slide 24, and only one actuator 25 to be provided, which due to the mechanical coupling simultaneously adjusts both trimming devices 5, the trimming devices 5 without mechanical coupling and each separately adjustable execute, wherein at least two adjusting devices 25 can be provided, each adjusting one of the two Besäumeinrichtungen 5. This can be advantageous in particular if, as a result of this separate adjustability of the two lateral trimming devices 5, an adjustment of the width b of the trimmed press material mat 9 'is likewise realized, for example via an input of the

Operator at a plant control. For tape running control can then

Tape running control corresponding control signals to the two

Actuate 25 issue or cause so that the desired lateral offset of the edged Pressgutmatte 9 'to the ideal position 26 is made.

In addition, it is also possible that only one of the two Besäumeinrichtungen 5 is adjusted laterally, while the other Besäumeinrichtung 5 remains in position, and, for example, fixed mechanically and not adjustable. In this case, the setting of a lateral offset of the trimmed pressed material mat 9 'to the ideal position 26 takes place in that by a corresponding adjustment of the

Trimming device 5 on only one side of the width b of the trimmed Pressgutmatte 9 'is increased or decreased, and in this way a trimmed

Pressgutmatte 9 'results, which is no longer central or symmetrical to the ideal position 26, but due to the larger or smaller width b relative to the ideal position 26 is offset to one side. Since only one trimming device 5 has to be adjusted laterally, a correspondingly lower mechanical effort is necessary for this purpose, which is however associated with the disadvantage that the width b of the trimmed press material mat 9 'does not remain constant during the strip running control.

The Einjustierung and coarse regulation of the steel strips 1 1 can optionally be done by the longitudinal axis ll of the drive drum axes by means of actuators (not shown) is adjusted. List of Reference P1512

1 spreading machine

2 belt scale

3 pre-press

4 metal detector

5 trimming device

5a saw blade

5b drive

6 waste bunker

7 press

8 form band

9 pressed material mat

9 'pressed material mat (trimmed)

10 tail pulley

1 1 steel strip

12 Rolistangenumlauf

13 press plate

16 handover nose

18 discharge area

19 intermediate band

20 separating device

21 drive drum

22 press nip

23 linear guides

24 sleds

25 adjusting device

26 Ideal situation

27 tape running sensor

28 Production direction

li longitudinal axis of the continuously operating press 7 b width of the pressed material mat 9, 9 ' State of the art:

DE 199 31 176 A1 DE 40 17 791 C2 EP 1 479 510 A2

Claims

claims

1 . Method for steel strip guide in a continuously operating press (7) for the production of, in particular lignocellulosic material plates such as chipboard, fiberboard, OSB boards, plywood or plastic plates, with the pressing pressure transmitted and the material to be pressed through the press pulling, flexible, endless Steel bands (1 1), wherein a pressed material mat (9, 9 ') between the steel bands (1 1) in a press nip (22) of the continuous press (7) is introduced, the steel bands (1 1) over

Drive drums (21) and idler pulleys (10) are guided, wherein the course of the steel belts (1 1) from the longitudinal axis (ll) by means of one or more tape running sensors (27) measured and with a belt running device in the longitudinal axis (ll) of the continuously operating press (7), characterized in that

the provision of the steel strips (1 1) in the longitudinal axis (l-l) of the continuously operating press (7) by at least one of the Besäumeinrichtungen (5) for trimming the mat edges of the pressed material mat (9, 9 ') in a

Transverse direction to the production direction (28) is adjusted.

2. The method according to claim 1, characterized in that the

Besäumeinrichtungen (5) at a distance of less than 10 m, preferably less than 7 m, more preferably less than 5 m, most preferably less than 3 m in front of an inlet region of the continuously operating press (7) are arranged.

3. The method according to any one of the preceding claims, characterized in that for the provision of the steel strips (1 1) in the longitudinal axis (ll) of the continuously operating press (7) the trimming devices (5) are adjusted in the transverse direction to the production device (28), wherein preferably the adjustment is made so that a distance (b) between the

Trimming devices (5) is kept constant.

4. The method according to any one of the preceding claims, characterized in that the Besäumeinrichtungen (5) are designed as Besäumsägen or as Besäumfräser.

5. The method according to any one of the preceding claims, characterized in that the strip running controller implements a PID controller.

6. plant for the production of, in particular lignocellulosic,

Material boards such as chipboard, fiberboard, OSB boards, plywood boards or plastic boards, comprising:

a continuous press (7) with flexible, endless steel belts (1 1) for transmitting the pressing pressure and for drawing the material to be pressed by the press (7), wherein the steel belts (1 1) via drive drums (21) and idler pulleys (10 ) and define a press nip (22);

one or more tape running sensors (27) for measuring the course of the steel belts (1 1) from a longitudinal axis L-l of the continuously operating press (7); and

a strip running control device for adjusting the course of the steel strips (1 1) in the longitudinal axis (L-l),

characterized in that

the system further comprises at least two trimming devices (5) for trimming the mat edges of the pressed material mat (9, 9 '), wherein at least one of the trimming devices (5) is adjustable by means of at least one adjusting device (25) in a transverse direction, and

the strip running control device is set up to control at least one setting device (25) in order to adjust at least one of the trimming devices (5) in the transverse direction to the production direction (28) in order to line the steel strips (1 1) into the longitudinal axis (1-l).

7. Plant according to claim 6, characterized in that the

8. Installation according to one of claims 6 to 7, characterized in that the

Trimming devices (5) in the transverse direction to the production direction (28) are adjustable, wherein the one adjusting device (25) allows a simultaneous adjustment of the trimming devices (5), wherein preferably the adjustment takes place such that a distance (b) between the trimming devices (5 ) is kept constant.

9. Plant according to one of claims 6 to 7, characterized in that the

Trimming devices (5) in the transverse direction to the production direction (28) are adjustable, wherein at least two adjusting devices (25) are provided, each one of the trimming devices (5) in the transverse direction to

Production direction (28) can be adjusted, wherein preferably the adjustment is made so that a distance (b) between the Besäumeinrichtungen (5) is kept constant.

10. Plant according to one of claims 6 to 9, characterized in that the

Trimming devices (5) are designed as Besäumsägen or as trimming cutter.

1 1. Installation according to one of claims 6 to 10, characterized in that the

Installation is designed to carry out the method according to one of claims 1 to 5.