Corrugated board equipment

Abstract

A corrugated board plant comprises a device (1) for producing a single-sided laminated corrugated board web, a lamination web spreading device (17) for spreading a lamination web (18, 19), and a connecting device (36) for connecting the single-sided laminated corrugated board web (2) and the lamination web (18, 19) to form a double-sided laminated corrugated board web (39) having a first longitudinal edge region (47). Furthermore, the corrugated board device has a web edge detection device with at least one first web edge detection device (44) arranged downstream of the connecting device (36) for detecting the web edge of the double-sided laminated corrugated board web (39) in the double-sided laminated corrugated board web (39). A first web edge (50, 51, 54) of the single-sided laminated corrugated board web (2) and of the laminating web (18, 19) is detected at least in the first longitudinal edge region (47) of the double-sided laminated corrugated board web (39) in order to check the arrangement of the single-sided laminated corrugated board web (2) and of the laminating web (18, 19) in the double-sided laminated corrugated board web (39) with respect to one another. The cardboard installation also has a processing unit (56) which is in signal connection with the web edge detection device and which is capable of processing a web edge signal relating to the double-sided laminated cardboard web (39).

Description

Technical Field

[0001] The present invention relates to a corrugated cardboard device. Additionally, the present invention also relates to a method for producing corrugated cardboard. Background Art

[0002] Corrugated cardboard devices are known through public prior use, where, before single webs are adhesively joined to each other, the web edges of the single webs are detected in order to check their arrangement relative to each other, so as to form a double-sided laminated corrugated cardboard web. The quality of such double-sided laminated corrugated cardboard webs is often unsatisfactory. Their production is also not always sustainable. Summary of the Invention

[0003] The object of the present invention is to provide an improved corrugated cardboard device. In particular, the corrugated cardboard device should be able to produce corrugated cardboard particularly efficiently and sustainably, and the corrugated cardboard should preferably also have extremely high quality. In addition, a corresponding method should be provided.

[0004] According to the present invention, this object is achieved by the features specified in independent claims 1 and 15. It has been recognized according to the present invention that the size and / or (lateral) dimensions of a single-sided laminated corrugated cardboard web and / or a laminated web can change, in particular shrink, before they are joined to each other to form a double-sided laminated corrugated cardboard web, and / or they can have a run relative to each other. The core of the present invention lies in at least one first web edge detection device which is arranged downstream of the connecting device in the conveying or transporting direction of the double-sided laminated corrugated cardboard web, so as to be able to detect or check the double-sided laminated corrugated cardboard web after connection. Thus, it is possible to take into account or detect the size change of the single-sided laminated corrugated cardboard web and / or the laminated web and / or their run relative to each other based on the double-sided laminated corrugated cardboard web.

[0005] For example, by means of a web edge detection device or a processing unit, precise connection of the single-sided laminated corrugated cardboard web and the laminated web can be achieved, for example, automatically, particularly fully automatically. When appropriate, readjustment of the single-sided laminated corrugated cardboard web and / or the laminated web is carried out, particularly in its lateral direction or width direction, advantageously when exceeding a predetermined tolerance range. Preferably, adjustment of the web edge difference of the single-sided laminated corrugated cardboard web and / or the laminated web is carried out.

[0006] The at least one first web edge detection device preferably operates in a non-contact manner during operation and preferably operates when transporting a double-sided laminated corrugated cardboard web. Advantageously, it is designed as an optical, in particular electro-optical, web edge detection device which preferably can detect or measure, for example continuously or cyclically, the spacing or distance of the single-sided laminated corrugated cardboard web or at least one single web / material web (face web and intermediate web) and the first web edge, in particular the longitudinal edge, of the laminated web in the double-sided laminated corrugated cardboard web, in order to check the arrangement, alignment or offset of the single-sided laminated corrugated cardboard and the laminated web in the double-sided laminated corrugated cardboard web in the transverse direction or width direction (i.e., perpendicular to the longitudinal direction or longitudinal extension of the double-sided laminated corrugated cardboard).

[0007] Advantageously, each longitudinal edge region has a run along the longitudinal direction of the double-sided laminated corrugated cardboard web. The longitudinal edge region preferably extends adjacent to the respective longitudinal edge of the double-sided laminated corrugated cardboard web. The first longitudinal edge region extends, for example, on the operator side, while the second longitudinal edge region extends, for example, on the drive side. Alternatively, the opposite orientation is also possible. The longitudinal edge regions extend spaced apart from each other in the transverse direction of the double-sided laminated corrugated cardboard web.

[0008] Suitably, the connecting device is designed as a heating-pressing device which preferably forms at least one connecting gap through which the single-sided laminated corrugated cardboard web and the laminated web are guided to be connected to each other, in particular glued or firmly connected.

[0009] Advantageously, upstream of the device for producing the single-sided laminated corrugated cardboard web, there is arranged a first unwinding device for unwinding a first material web, preferably an infinitely long first material web, and a second unwinding device for unwinding a second material web, preferably an infinitely long second material web.

[0010] The device for producing the single-sided laminated corrugated cardboard web preferably can produce the first material web and the second material web into a single-sided laminated corrugated cardboard web. The device preferably includes a corrugating device for corrugating the first material web to form a corrugated web. Suitably, the device has a sizing device for sizing the corrugated web. Advantageously, the device for producing the single-sided laminated corrugated cardboard web has a pressing device for pressing the sized corrugated web and the second material web together to form a single-sided laminated corrugated cardboard web.

[0011] Advantageously, the laminated web unwinding device can unwind an infinitely long laminated web.

[0012] The processing unit is preferably implemented as a control and / or regulation unit and is capable of receiving and processing web edge signals, in particular web edge signals directly or indirectly from a web edge detection device. Advantageously, the processing unit is an electrical, preferably electronic, processing unit. The processing unit is, for example, part of a web edge detection device. However, the processing unit is preferably arranged upstream of the web edge detection device.

[0013] Further advantageous designs of the invention are disclosed in the dependent claims.

[0014] The arrangement of at least one first web edge detection device according to dependent claim 2 enables extremely high detection accuracy for a double-sided laminated corrugated cardboard web, which allows for particularly efficient production of a double-sided laminated corrugated cardboard web. In addition, such a double-sided laminated corrugated cardboard web has extremely high quality. Suitably, the at least one first web edge detection device is arranged spaced apart from the double-sided laminated corrugated cardboard web, in particular on the side of the double-sided laminated corrugated cardboard web, i.e., spaced apart in its transverse or width direction, but preferably adjacent to the double-sided laminated corrugated cardboard web. Advantageously, the at least one first web edge detection device is arranged there at the vertical height of the double-sided laminated corrugated cardboard web.

[0015] The design according to dependent claim 3 results in a particularly accurate and fast web edge detection device. Advantageously, the at least one first web edge detection device performs more than 100 measurements per second, preferably more than 500, preferably more than 1000. The at least one first web edge detection device preferably includes at least one light beam source, such as a laser source, which directs or focuses at least one light beam, advantageously a large number of light beams or light beam lines, onto the first web edge of a single-sided laminated corrugated cardboard web and a laminated web. Suitably, the at least one first web edge detection device also has at least one receiving unit which is capable of receiving at least one light beam reflected from the web edge of a single-sided laminated corrugated cardboard web and a laminated web, preferably via at least one optical element or steering mirror. The at least one receiving unit is implemented, for example, as a sensor, camera, photodiode, CCD unit, etc. In operation, the at least one reflected light beam preferably acts on the at least one receiving unit at a specific angle depending on the distance. Preferably, the distance to the first web edge of a single-sided laminated corrugated cardboard web and a laminated web can be determined or calculated based on the position of at least one point of the at least one light beam on the at least one receiving unit and the distance from the at least one light beam source to the at least one receiving unit. Thus, the determination of the distance is carried out by calculating the angle.

[0016] The design according to dependent claim 4 allows for adjustment of the double-sided laminated corrugated cardboard web, for example automatic adjustment, preferably stepwise or stepless adjustment, in particular adjustment of its width in the transverse direction. Alternatively, the at least one first web edge detection device is, for example, position-fixed or stationary, which enables detection of the web edges of the double-sided laminated corrugated cardboard web in a relatively cost-effective manner.

[0017] The at least one web edge evaluation device according to dependent claim 5 is preferably capable of receiving and processing the web edge signals of the double-sided laminated corrugated cardboard web from the at least one first web edge detection device. The at least one web edge evaluation device is preferably of an electrical or electronic nature and is at least temporarily in a direct or indirect signal connection with the processing unit.

[0018] The at least one second web edge detection device according to dependent claim 6 is preferably designed to be the same as the at least one first web edge detection device. Preferably, the at least one second web edge detection device is also arranged similarly to the at least one first web edge detection device. The web edge detection device according to dependent claim 6 has a very high detection accuracy. The web edge detection device can detect the offset between the single-sided laminated corrugated cardboard web and the laminated web in the double-sided laminated corrugated cardboard web particularly accurately and reliably. Appropriately, the at least one first web edge detection device and the at least one second web edge detection device are arranged at a common vertical height.

[0019] Preferably, the at least one first web edge detection device detects the first web edge of the laminated web during operation, i.e., the web edge on the first side. Advantageously, the at least one first web edge detection device also detects at least one first web edge of the single-sided laminated corrugated cardboard web or at least one single web (face web and / or intermediate web) of the single-sided laminated corrugated cardboard web, i.e., at least one web edge on the first side. Preferably, the difference between the detected first web edges is calculated.

[0020] Furthermore, the at least one second web edge detection device detects the second web edge of the laminated web during operation, i.e., the web edge on the second side. Advantageously, the at least one second web edge detection device also detects at least one second web edge of the single-sided laminated corrugated cardboard web or at least one single web (face web and / or intermediate web) of the single-sided laminated corrugated cardboard web, i.e., at least one web edge on the second side. Preferably, the difference between the detected second web edges is calculated.

[0021] Subsequently, preferably the difference between the calculated differences is calculated.

[0022] Preferably, the method is also used similarly for a double-sided laminated corrugated cardboard web having more than one single-sided laminated corrugated cardboard web.

[0023] The design according to dependent claim 7 also allows the detection of the arrangement of the single-sided laminated corrugated cardboard web and the laminated web relative to each other in the double-sided laminated corrugated cardboard web with particular precision and functional reliability. The double-sided laminated corrugated cardboard web has a run between the at least one first web edge detection device and the at least one second web edge detection device, for example a centered or laterally offset run.

[0024] The design according to dependent claim 8 makes it possible to detect the first web edge before trimming and preferably also the second web edge if appropriate, so that the (original) offset between the single-sided laminated corrugated cardboard web and the laminated web in the double-sided laminated corrugated cardboard web can be determined reliably and accurately. For example, the trimming device is part of a slitting / corrugating device. Accordingly, the at least one first web edge detection device and preferably also the at least one second web edge detection device (if any) are arranged between the trimming device and the connecting device.

[0025] The design according to dependent claim 9 allows the laminated web and the single-sided laminated corrugated cardboard web to be displaced relative to each other if necessary or required, which particularly affects the arrangement of the laminated web and the single-sided laminated corrugated cardboard web relative to each other in the double-sided laminated corrugated cardboard web. The at least one displacement device preferably contacts directly or indirectly the web to be displaced and can, for example, be displaced axially, for example translationally, and / or deflected or tilted or skewed.

[0026] The design according to dependent claim 10 enables the particularly efficient production of double-sided laminated corrugated cardboard webs. Trimming can thus be avoided or reduced. Scrap can thus be avoided or reduced. Preferably, there is alignment or adjustment of the center or edge of the web. The webs are adhesively or glued together, for example precisely at the center or edge.

[0027] For example, the at least one displacement device according to dependent claim 11 can cause a corresponding displacement, for example translation and / or tilting, of at least one receiving device for receiving at least one roll of laminated web, which allows the run of the laminated web to be changed in its transverse direction and the arrangement of the laminated web relative to the single-sided laminated corrugated cardboard web in the double-sided laminated corrugated cardboard web to be changed. In particular, at least one receiving device can be translated laterally and / or tilted or skewed from its basic or neutral position. In the basic position, the laminated web is unwound normally. Advantageously, the transverse position of the laminated web relative to the single-sided corrugated cardboard web in the double-sided laminated corrugated cardboard web is changed here, for example to minimize the single-layer edge region.

[0028] The at least one displacement device according to dependent claim 12 is preferably capable of deflecting or diverting a single-sided laminated corrugated cardboard web. For example, it is designed as a displacement roller, in particular a displaceable roller, which makes it possible to change the run of the single-sided laminated corrugated cardboard web in its transverse direction and makes it possible to change the single-sided laminated corrugated cardboard web relative to the laminated web in the double-sided laminated corrugated cardboard web. In particular, at least one displacement roller can be tilted or inclined from its basic position or neutral position. In the basic position, the single-sided laminated corrugated cardboard web remains undeflected.

[0029] That is, the web edge detection device according to dependent claim 13 can perform a quality inspection on the double-sided laminated corrugated cardboard web. For example, it is possible to determine whether there is at least local crushing in the double-sided laminated corrugated cardboard web or its laminated web or the single-sided laminated corrugated cardboard web. For example, this allows the conclusion to be drawn as to whether the double-sided laminated corrugated cardboard web or its single web has been incorrectly heated, for example too cold or too hot, and / or whether the working gap has been incorrectly set, for example too narrow or too wide.

[0030] The corrugated cardboard device according to dependent claim 14 is capable of producing a double-sided laminated corrugated cardboard web with more than three layers (for example, five or seven layers). The device for producing the single-sided laminated corrugated cardboard web is preferably designed identically. Each device for producing the single-sided laminated corrugated cardboard web is capable of producing a single-sided laminated corrugated cardboard web.

[0031] Dependent claims 2 to 14 also form preferred refinements of the method according to independent claim 15. Description of the Drawings

[0032] Preferred embodiments of the present invention will be described below by way of example with reference to the drawings. In the drawings:

[0033] Figure 1 A partial side view of a corrugated cardboard device according to the present invention is shown,

[0034] Figure 2 illustrated in a simplified manner Figure 1 a view of the web edge detection device of the corrugated cardboard device shown in

[0035] Figure 3 shown corresponding to Figure 2 a view which shows an alternative web edge detection device of the corrugated cardboard device according to the present invention,

[0036] Figure 4 a top view which essentially shows the displacement device together with its surroundings, the displacement device being for displacing the single-sided laminated corrugated cardboard web of the corrugated cardboard device shown, and

[0037] Figure 5 shows a cross-section corresponding to Figure 4 the section line V-V in DETAILED DESCRIPTION

[0038] First, referring to Figure 1 , the corrugated board apparatus includes a first apparatus 1 for producing a single-sided laminated corrugated board web, and the first apparatus is capable of producing a first single-sided laminated infinite corrugated board web 2. The corrugated board apparatus further has a second apparatus 3 for producing a single-sided laminated corrugated board web, and the second apparatus is capable of producing a second single-sided laminated infinite corrugated board web 4.

[0039] Upstream of the first apparatus 1 for producing a single-sided laminated corrugated board web, a first splicing apparatus (not shown) and a second splicing apparatus (not shown) are arranged.

[0040] The first splicing apparatus is implemented as an intermediate web splicing apparatus. The first splicing apparatus includes a first unwinding device for unwinding a first finite intermediate web from a first intermediate web roll and a second unwinding device for unwinding a second finite intermediate web from a second intermediate web roll. The first splicing apparatus is capable of connecting the first finite intermediate web and the second finite intermediate web to each other to form a first infinite intermediate web 6 ( Figure 2 ).

[0041] The second splicing apparatus is designed to be the same as the first splicing apparatus. The second splicing apparatus is implemented as a face web splicing apparatus and includes a third unwinding device for unwinding a first finite face web from a first face web roll and a fourth unwinding device for unwinding a second finite face web from a second face web roll. The second splicing apparatus is capable of connecting the first finite face web and the second finite face web to each other to form a first infinite face web 5 ( Figure 2 ).

[0042] Upstream of the second apparatus 3 for producing a single-sided laminated corrugated board web, a third splicing apparatus (not shown) and a fourth splicing apparatus (not shown) are arranged.

[0043] The third splicing apparatus is implemented as an intermediate web splicing apparatus. The third splicing apparatus includes a fifth unwinding device for unwinding a third finite intermediate web from a third intermediate web roll and a sixth unwinding device for unwinding a fourth finite intermediate web from a fourth intermediate web roll. The third splicing apparatus is capable of connecting the third finite intermediate web and the fourth finite intermediate web to each other to form a second infinite intermediate web 8 ( Figure 2 ).

[0044] The fourth splicing device is designed to be the same as the third splicing device. The fourth splicing device is implemented as a web splicing device and includes a seventh unwinding device for unwinding a third limited web from a third web roll and an eighth unwinding device for unwinding a fourth limited web from a fourth web roll. The fourth splicing device is capable of connecting the third limited web and the fourth limited web to each other to form a second infinite web 7 ( Figure 2 ).

[0045] The first infinite intermediate web 6 and the first infinite web 5 are fed into a first device 1 for producing a single-sided laminated corrugated web. The second infinite intermediate web 8 and the second infinite web 7 are fed into a second device 3 for producing a single-sided laminated corrugated web.

[0046] Each device 1, 3 for producing a single-sided laminated corrugated web includes a corrugating device (not shown) having a first corrugating roll and a second corrugating roll for producing the corresponding fed infinite intermediate web 6 or 8 into an infinite corrugated web having corrugations or flutes. The corrugating rolls are arranged adjacent to each other in each device 1, 3 for producing a single-sided laminated corrugated web and form a corrugating roll pair. These corrugating rolls form a corrugating gap for guiding the corresponding infinite intermediate web 6 or 8 therethrough and corrugating it. The corrugating rolls are supported in a rotatable or rotatably drivable manner. The rotational axes of the corrugating rolls in each corrugating roll pair have a direction parallel to each other and preferably overlapping each other.

[0047] In order to connect the corresponding infinite webs 5, 7 to the corresponding infinite corrugated intermediate web or corrugated web 6 or 8 to form the corresponding single-sided laminated corrugated web 2 or 4, each device 1, 3 for producing a single-sided laminated corrugated web has a sizing device which advantageously includes a sizing roll, a glue-dropping roll and a glue container. Each sizing roll forms a glue gap together with the adjacent first corrugating roll for guiding the corresponding infinite corrugated intermediate web or corrugated web 6 or 8 therethrough and sizing it. The glue located in the respective glue container is applied to the tops of the corrugations of the corresponding infinite corrugated web 6 or 8 via the corresponding sizing roll. Each glue-dropping roll is assigned to the corresponding sizing roll for forming a uniform glue layer on the corresponding sizing roll.

[0048] Then, in the corresponding apparatus 1 or 3 for producing a single-sided laminated corrugated cardboard web, each smooth endless web 5, 7 is joined to a corresponding endless corrugated web 6 or 8 provided with glue from a corresponding glue container. In order to press the respective endless web 5 or 7 against the endless corrugated web 6 or 8 provided with glue, which in turn is partially abutted against an adjacent first corrugating roll, each apparatus 1, 3 for producing a single-sided laminated corrugated cardboard web has a pressing device (not shown), which is embodied as a pressing belt device or a pressing belt module. Each pressing device is arranged above an adjacent first corrugating roll. The pressing device has at least two pressing belt-type deflecting rolls arranged at a distance from one another and an endless pressing belt guided around the pressing belt-type deflecting rolls. Each first corrugating roll is partially engaged from below into the space between the adjacent pressing belt deflecting rolls, so that the pressing belt is deflected by the corresponding first corrugating roll. Each pressing belt presses against the corresponding endless web 5 or 7, which in turn presses against the endless corrugated web 6 or 8 provided with glue and abutted against an adjacent first corrugating roll, to form a single-sided laminated corrugated cardboard web 2 or 4.

[0049] The first single-sided laminated endless corrugated web 2 comprises exactly one first endless web 5 and exactly one first endless intermediate web 6. The second single-sided laminated endless corrugated cardboard web 4 has exactly one second endless web 7 and exactly one second endless intermediate web 8. Each single-sided laminated endless corrugated cardboard web 2 or 4 is two-layered.

[0050] Each single-sided laminated endless corrugated cardboard web 2 or 4 is fed via a corresponding lifting and transporting device of a bridge 9 of the corrugated cardboard apparatus for intermediate storage and buffering, where, if there is sufficient storage capacity, the corrugated cardboard web forms a loop.

[0051] The first single-sided laminated endless corrugated cardboard web 2 is guided on the bridge 9 to a first guiding device 10 for guiding the first single-sided laminated endless corrugated cardboard web 2. The first guiding device 10 is arranged in the end region downstream of the bridge 9.

[0052] The second single-sided laminated endless corrugated cardboard web 4 is guided on the bridge 9 to a second guiding device 11 for guiding the second single-sided laminated endless corrugated cardboard web 4. The second guiding device 11 is arranged in the end region downstream of the bridge 9. The second guiding device is located below the first guiding device 10.

[0053] Each guiding device 10, 11 can, for example, detect the lateral position of the respective single-sided laminated endless corrugated cardboard web 2 or 4. Appropriately, each guiding device 10, 11 can correct the lateral position of the respective endless single-sided corrugated cardboard web 2 or 4 downstream, and in particular, ensure the lateral deviation of the respective single-sided laminated endless corrugated cardboard web 2 or 4 downstream if necessary. Here, each guiding device 10, 11 can correspondingly guide the respective single-sided laminated endless corrugated cardboard web 2 or 4. For this purpose, each guiding device 10, 11 has at least one guiding roller 12, which, for example, is in direct contact with the respective single-sided laminated endless corrugated cardboard web 2 or 4 or is partially wound by it. The at least one guiding roller 12 extends in a basic position perpendicular to the conveying direction 14 of the respective single-sided laminated endless corrugated cardboard web 2 or 4. The at least one guiding roller can be tilted or inclined from the basic position, in particular about a vertical axis or a perpendicular axis, so that the respective single-sided laminated endless corrugated cardboard web 2 or 4 undergoes a lateral deviation or a lateral translation. For this purpose, each guiding roller 12 is preferably assigned a corresponding (actuating) drive. For the lateral deviation of the respective single-sided laminated endless corrugated cardboard web 2 or 4, the corresponding guiding roller 12 is preferably pressed against the single-sided laminated endless corrugated cardboard web 2 or 4 to be deflected. The guiding devices 10, 11 can be operated independently of each other. As Figure 4 shown, the at least one guiding roller 12 extends only over a partial width of the respective single-sided laminated endless corrugated cardboard web 2 or 4.

[0054] For example, a splicing detection device is provided in or adjacent to each guiding device 10, 11, which can detect a change in the width of the respective single-sided laminated endless corrugated cardboard web 2 or 4 and / or directly detect a splicing point in the respective single-sided laminated endless corrugated cardboard web 2 or 4. For this purpose, each splicing detection device preferably has a rotatable detection roller lying flat on the respective single-sided laminated endless corrugated cardboard web 2 or 4 and / or a non-contact scanning device for scanning the side region of the respective single-sided laminated endless corrugated cardboard web 2 or 4. The detection rollers each extend transversely to the conveying direction 14 of the respective single-sided laminated endless corrugated cardboard web 2 or 4 and are used to mechanically detect the splicing points in the passed single-sided laminated endless corrugated cardboard web 2 or 4. The scanning device can detect a change in the width of the passed single-sided laminated endless corrugated cardboard web 2 or 4, which can also lead to a conclusion about the splicing point in the single-sided laminated endless corrugated cardboard web 2 or 4.

[0055] For example, upstream of and preferably adjacent to each guide roller 12, a pair of loop releasing rollers are arranged, which ensure there that the corresponding single-sided laminated endless corrugated cardboard webs 2 or 4 are loop released. The loop releasing rollers in a pair of loop releasing rollers are arranged spaced apart from each other substantially horizontally, and extend transversely to the conveying direction 14 of the corresponding single-sided laminated endless corrugated cardboard web 2 or 4. Each single-sided laminated endless corrugated cardboard web 2, 4 is guided through a pair of loop releasing rollers.

[0056] Alternatively or additionally, preferably, at least one guide roller 13 is arranged upstream of and beneficially adjacent to each guide roller 12 for guiding the corresponding single-sided laminated endless corrugated cardboard web 2 or 4.

[0057] A braking roller 16 is provided downstream of each guide roller 12, which braking roller is preferably made of rubber and can be rotationally driven and / or braked by a servo drive (not shown). The braking roller 16 ensures that the tensioned or taut single-sided laminated endless corrugated cardboard webs 2, 4, the web tension of which is preferably kept constant. Each single-sided laminated endless corrugated cardboard web 2, 4 is assigned a braking roller 16, and the corresponding single-sided laminated endless corrugated cardboard web 2 or 4 is guided around the braking roller.

[0058] A light curtain 16a is arranged between each guide roller 12 and the downstream braking roller 16, which light curtain can detect the corresponding single-sided laminated endless corrugated cardboard web 2 or 4.

[0059] At least one guide roller 15 is arranged downstream of each braking roller 16 for guiding the corresponding single-sided laminated endless corrugated cardboard web 2 or 4.

[0060] The corrugated cardboard equipment further includes a laminated web splicing device 17, which can produce a laminated web 18, in particular an endless laminated web. The laminated web splicing device 17 is preferably implemented in the same way as other splicing devices. The laminated web splicing device has a ninth unwinding device 21 for unwinding a first finite laminated web 19 from a first laminated web roll 20 and a tenth unwinding device 23 for unwinding a second finite laminated web from a second laminated web roll 22.

[0061] The laminated web splicing device 17 also has a frame 24, which frame has at least one frame base 25, at least one frame column 26 and at least one frame bracket 27. The at least one frame base 25 is fixed to the floor or a pedestal. The at least one frame column 26 extending vertically or upright with respect to the floor is arranged at the at least one frame base 25. The at least one frame bracket 27 is arranged at an end of the at least one frame column 26 opposite to the at least one frame base 25 and parallel to the floor. The ninth unwinding device 21 and the tenth unwinding device 23 are arranged opposite to each other with respect to the at least one frame column 26 or the frame base 25.

[0062] The at least one frame bracket 27 carries the splicing device 17 of the laminating web splicing apparatus. By means of the splicing device, a first finite laminating web 19 and a second finite laminating web are connected to each other to provide an infinite laminating web 18. The first finite laminating web 19 or the second finite laminating web is guided from the respective laminating web rolls 20 and 22 into the splicing device. The splicing device is preferably embodied as a connecting and cutting device. The connecting and cutting device includes, for example, a first preparation device, a second preparation device, a first connecting device, a second connecting device, a table device and a guide rail, and a displaceable storage trolley. The infinite laminating web 19 is single-layered.

[0063] The frame 24 carries a long first carrying assembly that extends horizontally and supports a ninth unwinding device 21. The ninth unwinding device 21 has two first carrying arms 28 that are arranged along the longitudinal direction of the first carrying assembly and each carry a first receiving portion. These first receiving portions are guided into the central opening of the first laminating web roll 20. These first receiving portions engage with the first laminating web roll 20 from two end faces. Here, the longitudinal central axis of the first laminating web roll 20 is parallel to the first carrying assembly.

[0064] The first carrying arms 28 can be translated longitudinally together integrally along the longitudinal direction of the first carrying assembly, which results in the longitudinal translation of the first laminating web roll 20 along its longitudinal central axis, or the translation of the first finite laminating web 19 or the infinite laminating web 18 that is unwound therefrom in its transverse direction or width direction. Alternatively or additionally, these first carrying arms can pivot relative to each other about the first carrying assembly, which enables the tilting of the first laminating web roll 20 and thus enables the deviation of the first finite laminating web 19 or the infinite laminating web 18 in its transverse direction.

[0065] The frame 24 also carries a long second carrying assembly that extends horizontally and is parallel to the first carrying assembly. The second carrying assembly supports a tenth unwinding device 23. The tenth unwinding device 23 has two second carrying arms 29 that are arranged along the longitudinal direction of the second carrying assembly and each carry a second receiving portion. These second receiving portions are guided into the central opening of the second laminating web roll 22. These second receiving portions engage with the second laminating web roll 22 from two end faces. Here, the longitudinal central axis of the second laminating web roll 22 is parallel to the second carrying assembly.

[0066] The second carrier arm 29 can be longitudinally translated integrally together along the second carrier assembly, which causes the second laminate web roll 22 to be longitudinally translated along its longitudinal central axis, or the second finite laminate web or infinite laminate web 18 deployed therefrom to be translated in its transverse direction or width direction. Alternatively or additionally, these second carrier arms can pivot relative to each other about the second carrier assembly, which enables the tilting of the second laminate web roll 22 and thus the deflection of the second finite laminate web or infinite laminate web 18 in its transverse direction.

[0067] In order to cause a corresponding displacement of the first carrier arm 28, the laminate web splicing device 17 has at least one corresponding first displacement unit 30, which includes, for example, at least one electric drive, pneumatic drive or hydraulic drive.

[0068] In order to cause a corresponding displacement of the second carrier arm 29, the laminate web splicing device 17 has at least one corresponding second displacement unit 31, which includes, for example, at least one electric drive, pneumatic drive or hydraulic drive.

[0069] Downstream of the braking roller 16 and the laminate web splicing device 17, a preheating device 32 of the corrugated board equipment is arranged, which includes three preheating rollers 33 arranged overlapping each other. The single-sided laminated infinite corrugated board webs 2, 4 and the infinite laminate web 18 are fed into the preheating device 32, and these webs are each partially wound around the preheating rollers 33 and thus heated.

[0070] Downstream of the preheating device 32, a gluing device 34 is arranged, which has two overlapping gluing rollers 35. The corrugated webs 6 or 8 of each single-sided laminated infinite corrugated board web 2, 4 abut against the corresponding gluing roller 35, and the gluing roller thus applies the glue from the assigned glue tank to the corrugated webs 6 or 8, preferably in a metered manner.

[0071] Downstream of the gluing device 34, a connecting device 36 of the corrugated board equipment is arranged, which is in the form of a heating-pressing device. In the heating-pressing device 36, the single-sided laminated infinite corrugated board webs 2, 4 provided with glue and the infinite laminate web 18 are heated and pressed together. For this purpose, the heating-pressing device 36 has a horizontal heating table 37 and at least one infinite pressing belt 38, which extends partially adjacent to the heating table 37 and is guided around the pressing belt guide rollers. A connecting gap is formed between the heating table 37 and the at least one pressing belt 38, and the single-sided laminated infinite corrugated board webs 2, 4 and the infinite laminate web 18 are guided through this connecting gap to form the double-sided laminated infinite corrugated board web 39 with a total of five layers here.

[0072] If the corrugated board equipment includes exactly one device for producing a single-sided laminated corrugated board web, a double-sided or two-sided laminated corrugated board web with a total of three layers can be produced. If the corrugated board equipment includes, for example, three devices for producing a single-sided laminated corrugated board web, a double-sided laminated corrugated board web with a total of seven layers can be produced.

[0073] Downstream of the connecting device 36, a slitting / corrugating device 40 of the corrugated board equipment is arranged. The slitting / corrugating device 40 has a corrugating station and a slitting station arranged one behind the other. Each of these corrugating stations has a pair of corrugating tools arranged overlapping each other, through which the double-sided laminated endless corrugated board web 39 passes. Each of these slitting stations has a rotatably drivable knife, which can engage with the double-sided laminated endless corrugated board web 39 for slitting. When the knife cuts into the double-sided laminated endless corrugated board web 39, the knife interacts with a relatively arranged, rotatably drivable counter element (for example, a brush roll). Through these slitting stations, the double-sided laminated endless corrugated board web 39 can be divided into several partial corrugated board webs 41, 42, which are conveyed further in the conveying direction 14 and are initially still adjacent to each other. These slitting stations can also perform trimming, especially two-sided trimming, on the double-sided laminated endless corrugated board web 39. These slitting stations also form a trimming device.

[0074] Downstream of the slitting / corrugating device 40, a diverter 43 is provided, which guides the partial corrugated board webs 41, 42 to different levels.

[0075] Downstream of the diverter 43, a cross-cutting device (not shown) of the corrugated board equipment is provided, which includes a pair of cross-cutting rollers arranged in pairs. The pair of cross-cutting rollers can completely cut off the partial corrugated board webs 41, 42 in the transverse direction, thereby producing sheets.

[0076] Downstream of the cross-cutting device, a stacking device (not shown) for stacking the sheets is arranged.

[0077] Between the connecting device 36 and the slitting / corrugating device 40, a first web edge detection device 44 and a second web edge detection device 45 are arranged. The web edge detection devices 44, 45 are designed to be the same and are arranged in a fixed position laterally spaced apart from but adjacent to the double-sided laminated endless corrugated board web 39, which is horizontal there. These web edge detection devices are arranged on such a horizontal straight line or plane that extends perpendicular to the conveying direction 14, that is, in the transverse direction or width direction of the double-sided laminated endless corrugated board web 39. The double-sided laminated endless corrugated board web 39, for example, has a run centered between the web edge detection devices 44, 45. The web edge detection devices 44, 45 are arranged almost on the left and right sides of the double-sided laminated endless corrugated board web 39.

[0078] The web edge detection devices 44, 45 are preferably carried by a carrying device that is directly or indirectly connected to the floor or base. For example, each web edge detection device 44, 45 is assigned its own carrying device. Alternatively, they share a common carrying device.

[0079] The web edge detection devices 44, 45 are designed as laser triangulation web edge detection devices. As Figure 2 shown, the first web edge detection device 44 generates a first laser field 46 during operation, which acts laterally from the outside on the adjacent first longitudinal edge region 47 of the double-sided laminated infinite corrugated cardboard web 39 and covers its entire thickness D. The second web edge detection device 45 generates a second laser field 48 during operation, which acts laterally from the outside on the adjacent second longitudinal edge region 49 of the double-sided laminated infinite corrugated cardboard web 39 and covers its entire thickness. The laser fields 46, 48 have a direction towards each other from the respective web edge detection devices 44 and 45, and preferably increase their lateral extension or height. During operation, they form laser lines on / at the double-sided laminated infinite corrugated cardboard web 39. The longitudinal edge regions 47, 49 are parallel to each other and extend parallel to each other in the conveying direction 14.

[0080] The first laser field 46 acts laterally from the outside on the first longitudinal edges 50 of the adjacent faces of the first infinite face web 5, the first longitudinal edges 51 of the adjacent faces of the first infinite intermediate web 6, the first longitudinal edges 52 of the adjacent faces of the second infinite face web 7, the first longitudinal edges 53 of the adjacent faces of the second infinite intermediate web 8, and the first longitudinal edges 54 of the adjacent faces of the infinite laminated web 18. The first longitudinal edges 50, 51, 52, 53 and 54 have adjacent and overlapping directions with each other. They are (substantially) parallel to each other and extend in the conveying direction 14. They each have a direction within the first longitudinal edge region 47.

[0081] The second laser field 48 acts laterally from the outside on the second longitudinal edges 50 of the adjacent faces of the first infinite face web 5, the second longitudinal edges 51 of the adjacent faces of the first infinite intermediate web 6, the second longitudinal edges 52 of the adjacent faces of the second infinite face web 7, the second longitudinal edges 53 of the adjacent faces of the second infinite intermediate web 8, and the second longitudinal edges 54 of the adjacent faces of the infinite laminated web 18. The second longitudinal edges 50, 51, 52, 53 and 54 have adjacent and overlapping directions with each other. They are (substantially) parallel to each other and extend in the conveying direction 14. They each have a direction within the second longitudinal edge region 49. The longitudinal edges 50, 51, 52, 53 and 54 of the respective webs 5, 6, 7, 8 and 18 each have parallel directions with each other. They form corresponding longitudinal edges.

[0082] Each web edge detection device 44, 45 is capable of generating laser fields 46 and 48 that extend there across the entire thickness D of the double-sided laminated endless corrugated cardboard web 39. The spacing or distance of the longitudinal edges 50 to 54 to the adjacent web edge detection devices 44, 45 can be determined in this way. The transverse position or run of the longitudinal edges 50 to 54 can be detected or measured. For this purpose, the web edge detection devices 44, 45 are at least temporarily in a signal connection with a web edge evaluation device 55, which receives the corresponding web edge electrical signals. Alternatively, each web edge detection device 44, 45 has, for example, its own integrated web edge evaluation device. Thus, the spacing or distance of the longitudinal edges 50 to 54 to the adjacent web edge detection devices 44, 45 is converted into a spacing signal or a web edge signal, in particular an electrical signal.

[0083] The web edge evaluation device 55 and the web edge detection devices 44, 45 are components of a web edge detection device.

[0084] The web edge detection device is at least temporarily in a signal connection with a processing unit 56 of the corrugated cardboard device, which is preferably capable of controlling and / or regulating the corrugated cardboard device or its operation.

[0085] The processing unit 56 is also at least temporarily in a signal connection with the laminated web splicing device 17, in particular with the first displacement unit 30 and the second displacement unit 31. The processing unit is also at least temporarily in a signal connection with the first guiding device 10 and the second guiding device 11.

[0086] In operation, the processing unit 56 receives electrical signals from the web edge detection device that relate to the respective current transverse positions of the first endless face web 5, the first endless intermediate web 6, the second endless face web 7, the second endless intermediate web 8, and the endless laminated web 18 in the web edge detection devices 44, 45. That is, the processing unit receives electrical signals from the web edge detection device in operation that relate to the respective current transverse positions of the single-sided laminated endless corrugated cardboard webs 2, 4, and the endless laminated web 18 in the web edge detection devices 44, 45.

[0087] If the web edge evaluation device 55 determines during operation that the first endless surface web 5, the first endless intermediate web 6, the second endless surface web 7, the second endless intermediate web 8, and / or the endless laminated web 18, or the first single-sided laminated endless corrugated cardboard web 2, the second single-sided laminated endless corrugated cardboard web 4, and / or the endless laminated web 18 are offset from each other in the transverse direction perpendicular to the conveying direction 14, or if there is a deviation between the actual value (range) and the set value (range) of the transverse position of the longitudinal edge in the transverse direction, then correspondingly, the processing unit 56 actuates the first guiding device 10 to laterally deflect the first single-sided laminated endless corrugated cardboard web 2, actuates the second guiding device 11 to laterally deflect the second single-sided laminated endless corrugated cardboard web 4, actuates the first displacement unit 30 to laterally deflect the finite first laminated web 19 or the endless laminated web 19, and / or actuates the second displacement unit 31 to laterally deflect the finite second laminated web or the endless laminated web 19. Thus, the transverse positions of the longitudinal edges 50 to 54 can vary from each other in the double-sided laminated endless corrugated cardboard web 39. Preferably, the adjustment of the longitudinal edge differences of the first single-sided laminated endless corrugated cardboard web 2, the second single-sided laminated endless corrugated cardboard web 4, and the endless laminated web 19 is carried out.

[0088] The terms "arranged upstream", "arranged downstream", "upstream", "downstream", etc. used here specifically refer to the conveying direction or transport direction of the associated or assigned web.

[0089] The signal connections shown can be wired or wireless. They preferably can transmit signals, especially electrical signals. They can be present continuously or periodically. The corresponding signals or information can be transmitted in this way.

[0090] The following refers to Figure 3 an alternative embodiment. Compared with the previous embodiment (the description of which is hereby expressly incorporated by reference), only exactly one device 1 for producing a single-sided laminated corrugated cardboard web is provided, so that the double-sided laminated endless corrugated cardboard web 39 has only three layers in total.

[0091] Each web edge detection device 44, 45 can be displaced in the transverse direction or width direction of the double-sided laminated endless corrugated cardboard web 39, preferably under guidance, for example, can be particularly horizontally translated or slid. The web edge detection devices 44, 45 can be displaced towards or away from each other, so that, for example, they can be adjusted to the width or transverse extent of the double-sided laminated endless corrugated cardboard web 39 to be detected. The displacement of the web edge detection devices 44, 45 is carried out manually or automatically, for example.

[0092] The web edge detection devices 44, 45 are preferably carried by a carrying device 57 that is directly or indirectly connected to the floor or base. For example, each web edge detection device 44, 45 is assigned its own carrying device 57. Alternatively, they share a common carrying device 57.

Claims

1. A corrugated cardboard device, the corrugated cardboard device comprising: a) A device (1) for producing a single-sided laminated corrugated cardboard web; b) A laminated web unwinding device (17) for unwinding the laminated webs (18, 19); c) A connecting device (36) for connecting the single-sided laminated corrugated cardboard web (2) of the device (1) for producing a single-sided laminated corrugated cardboard web and the laminated webs (18, 19) to each other to form a double-sided laminated corrugated cardboard web (39), the double-sided laminated corrugated cardboard web having a first longitudinal edge region (47) and a second longitudinal edge region (49); d) A web edge detection device having at least one first web edge detection device (44) arranged downstream of the connecting device (36), the at least one first web edge detection device for detecting in the double-sided laminated corrugated cardboard web (39), at least within the first longitudinal edge region (47) of the double-sided laminated corrugated cardboard web (39), the first web edges (50, 51, 54) of the single-sided laminated corrugated cardboard web (2) and the laminated webs (18, 19) to check the arrangement of the single-sided laminated corrugated cardboard web (2) and the laminated webs (18, 19) with respect to each other in the double-sided laminated corrugated cardboard web (39); and e) A processing unit (56) which is at least temporarily in signal connection with the web edge detection device and is capable of processing web edge signals regarding the double-sided laminated corrugated cardboard web (39).

2. The corrugated cardboard device according to claim 1, characterized in that, The at least one first web edge detection device (44) is arranged on the side of the double-sided laminated corrugated cardboard web (39).

3. The corrugated cardboard equipment according to claim 1 or 2, characterized in that, The at least one first web edge detection device (44) is designed as a triangulation web edge detection device.

4. The corrugated cardboard equipment according to any one of the preceding claims, characterized in that, The at least one first web edge detection device (44) is displaceable in the transverse direction of the double-sided laminated corrugated cardboard web (39).

5. The corrugated cardboard equipment according to any one of the preceding claims, characterized in that, The web edge detection device has at least one web edge evaluation device (55) which is at least temporarily in signal connection with the at least one first web edge detection device (44).

6. The corrugated cardboard equipment according to any one of the preceding claims, characterized in that, The web edge detection device has at least one second web edge detection device (45) for detecting in the double-sided laminated corrugated cardboard web (39), at least within the second longitudinal edge region (49) of the double-sided laminated corrugated cardboard web (39), the second web edges (50, 51, 54) of the single-sided laminated corrugated cardboard web (2) and the laminated webs (18, 19) to check the arrangement of the single-sided laminated corrugated cardboard web (2) and the laminated webs (18, 19) with respect to each other in the double-sided laminated corrugated cardboard web (39).

7. The corrugated cardboard equipment according to claim 6, characterized in that, The at least one first web edge detection device (44) and the at least one second web edge detection device (45) are arranged opposite to each other.

8. The corrugated cardboard equipment according to any one of the preceding claims, characterized in that Trimming device (40) for trimming a double-sided laminated corrugated cardboard web (39), wherein at least one first web edge detection device (44) is arranged upstream of the trimming device (40).

9. The corrugated cardboard equipment according to any one of the preceding claims, characterized in that At least one displacement device (10, 11, 30, 31) which is at least temporarily in signal connection with the processing unit (56) for displacing the laminated webs (18, 19) and / or the single-sided laminated corrugated cardboard web (2) relative to one another in their transverse direction as a function of the web edge signal.

10. The corrugated cardboard equipment according to claim 9, characterized in that, The at least one displacement device (10, 11, 30, 31) can ensure a centered or precisely edge-aligned arrangement of the laminated webs (18, 19) and the single-sided laminated corrugated cardboard web (2) in the double-sided laminated corrugated cardboard web (39).

11. The corrugated cardboard equipment according to claim 9 or 10, characterized in that, The laminated web spreading device (17) is at least temporarily in signal connection with the processing unit (56) and comprises at least one displacement device (30, 31) which can displace the laminated webs (18, 19) in their transverse direction as a function of the web edge signal, if appropriate.

12. The corrugated cardboard equipment according to any one of claims 9 to 11, characterized in that, The single-sided laminated corrugated cardboard web (2) is assigned at least one displacement device (10, 11) which is arranged upstream of the connecting device (36) and can displace the single-sided laminated corrugated cardboard web (2) in its transverse direction as a function of the web edge signal, if appropriate.

13. The corrugated cardboard equipment according to any one of the preceding claims, characterized in that, The web edge detection device can determine the web width of the single-sided laminated corrugated cardboard web (2), the laminated webs (18, 19) and / or the double-sided laminated corrugated cardboard web (39).

14. The corrugated cardboard equipment according to any one of the preceding claims, characterized in that At least two devices in a device (1, 3) for producing a single-sided laminated corrugated cardboard web, wherein at least one first web edge detection device (44) can detect at least two first longitudinal edges (50, 51, 52, 53, 54) of the single-sided laminated corrugated cardboard webs (2, 4) and the laminated webs (18, 19) at least in the first longitudinal edge region (47) of the double-sided laminated corrugated cardboard web (39) to check the arrangement of at least two of the single-sided laminated corrugated cardboard webs (2, 4) and the laminated webs (18, 19) relative to one another in the double-sided laminated corrugated cardboard web (39).

15. A method for producing corrugated cardboard, the method comprising the following steps: - producing a single-sided laminated corrugated cardboard web (2) by means of a device (1) for producing a single-sided laminated corrugated cardboard web; - spreading the laminated webs (18, 19) by means of a laminated web spreading device (17); - connecting the single-sided laminated corrugated cardboard web (2) and the laminated webs (18, 19) to one another by means of a connecting device (36) to form a double-sided laminated corrugated cardboard web (39) which has a first longitudinal edge region (47) and a second longitudinal edge region (49); - In the double-sided laminated corrugated cardboard web (39), at least the first web edges (50, 51, 54) of the single-sided laminated corrugated cardboard web (2) and the laminated webs (18, 19) are detected within at least the first longitudinal edge region (47) of the double-sided laminated corrugated cardboard web (39), in order to check the arrangement of the single-sided laminated corrugated cardboard web (2) and the laminated webs (18, 19) relative to one another in the double-sided laminated corrugated cardboard web (39) by means of at least one first web edge detection device (44) arranged downstream of the connecting device (36); and - The web edge signals regarding the double-sided laminated corrugated cardboard web (39) are processed by means of a processing unit (56), which is at least temporarily in signal connection with the web edge detection device.

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