Method for operating a corrugator, corrugator, computer programme product, and paper roll

Abstract

The invention relates to a method for operating a corrugator (2), the corrugator (2) being used to produce a corrugated cardboard web (4) and having a number of adjustable operating parameters (6) for this purpose, a number of paper rolls (12) being fed to the corrugator (2), each having a paper web made of a paper from which the corrugated cardboard web (4) is produced, the paper of each paper roll (12) being characterised by a number of paper parameters (14) which have individual values for each of the paper rolls (12) so that the paper of each paper roll (12) is individually characterised on the basis of its values for the paper parameters (14), and the operating parameters (6) being adjusted depending on the values of the paper parameters (14) so that the production of the corrugated cardboard web (4) is individually adapted to the paper of the fed paper roll (12). The invention also relates to a corrugator (2), a computer programme product, and a paper roll (12).

Description

[0001] Description

[0002] Method for operating a corrugated board plant, corrugated board plant, computer program product, paper roll

[0003] The invention relates to a method for operating a corrugated board plant as well as a corrugated board plant, a computer program product and a paper roll.

[0004] A corrugator is used to produce a single sheet of corrugated board. The corrugator is fed with several paper webs in the form of paper rolls. The paper rolls are unwound by a respective unwinder of the corrugator, and the resulting paper webs are joined together to form a single corrugated board web by several processing units.

[0005] For example, one of the paper webs is corrugated with a corrugating roller and then glued to two non-corrugated paper webs. Multi-layer corrugated board webs with more than one corrugated paper web are also possible. The finished corrugated board web is then optionally finished using the corrugator, i.e., cut into individual pieces and, if necessary, slit and / or grooved.

[0006] The quality of the produced corrugated board web depends, on the one hand, on the selection of appropriate values ​​for the operating parameters of the corrugator during operation (i.e., during the production of the corrugator web), but, on the other hand, also on the properties of the paper webs from which the corrugator web is produced. The operating parameters are adjusted, for example, manually by an operator during operation of the corrugator or automatically based on measurements taken by sensors directly upstream of each processing unit (inline measurement). This allows for responses to both changing ambient conditions and varying paper web properties.For example, temperature and humidity controls for adjusting the temperature and humidity of a particular paper web are conceivable as part of a control system for the corrugated board plant in order to influence the processing result of this processing unit as optimally as possible directly before a particular processing unit.

[0007] US 11,162,226 B2 describes a process in which a paper web is conditioned with a liquid film to achieve a specific moisture content. The conditioning depends on a hygroexpansiveness attribute, which is measured for or assigned to the paper web. The measurement of the hygroexpansiveness attribute is based on a subsequent measurement of the shape of the finished corrugated board, from which the hygroexpansiveness attribute is then calculated, so that similar paper webs can then be assigned the same hygroexpansiveness attribute. Accordingly, the assignment of the hygroexpansiveness attribute is generally based on the fact that similar paper webs can be assigned the same hygroexpansiveness attribute.

[0008] Additionally, reference is made to US 10,095,206 B2, EP 3 392 649 B1, EP 3 369 564 B1, EP 2 572 038 B1, EP 2 406 616 B1, EP 2 391 505 B1, EP 1 902 833 A1, EP 0 936 059 A2, DE 10 2017 219 064 A1, DE 10 2015 206 650 A1, CN 107 458 032 A, CN 107 631 684 A, CN 112 644 092 B, CN 207 105 756 U, CN 210 553 357 U.

[0009] Against this background, it is an object of the invention to improve the production of a corrugated board web. To this end, a suitable method for operating a corrugated board system, a corresponding corrugated board system, a computer program product, and an advantageous paper roll are to be provided.

[0010] The object is achieved according to the invention by a method having the features according to claim 1, a corrugated cardboard plant having the features according to claim 13, a computer program product having the features according to claim 14 and a paper roll having the features according to claim 15. Advantageous embodiments, further developments and variants are the subject of the dependent claims. The statements in connection with the method also apply mutatis mutandis to the corrugated cardboard plant, the computer program product and the paper roll and vice versa. If steps of the method are specified below, advantageous embodiments for the corrugated cardboard plant result from the fact that it is designed to carry out one or more of these steps (in particular by means of a control unit of the corrugated cardboard plant).Analogously, advantageous embodiments for the computer program product result from the fact that it comprises instructions which, when executed by a corrugator, cause it to carry out one or more of these steps.

[0011] A core idea of ​​the invention is in particular the use of paper data in a corrugated board plant and the supply (also transmission) of this paper data to the corrugated board layer.

[0012] The method is used to operate a corrugated board plant. This, in turn, is used to produce a corrugated board web and, for this purpose, has a number of adjustable operating parameters. An operating parameter is set by selecting and setting a value for this operating parameter. The behavior of one or more processing units of the corrugated board plant is controlled by the operating parameters. Examples of processing units are unwinders, splicers, printers, single-facers, bridges, preheaters, gluing units, double-facers, drying sections, cutting units, slitting units, creasing units, and the like. However, the details of the processing units are not important here. Examples of operating parameters are: conveyor speed, tension, ink quantity, corrugating roll temperature, glue quantity, water quantity for moistening, drying temperature, cutting and / or creasing position, and the like.The details of the processing parameters are also not relevant at this stage.

[0013] Within the scope of the method, a number of paper rolls are fed to the corrugator, each with a (i.e. at least one) paper web from which the corrugated board web is produced. In other words: the corrugator is supplied with a number of paper rolls during operation. “A number of” is understood here and also more generally to mean “one or more” or “at least one”. A respective paper roll is formed in particular by a paper web and a sleeve (also referred to as a bushing), on which the paper web is wound, which is unwound from the corrugator to produce the corrugated board web by means of an unwinder and is suitably connected to further paper webs of further paper rolls. A respective paper web is made of paper or consists of paper. The processing units then process the paper webs according to the operating parameters, i.e.Each operating parameter is assigned to at least one of the processing units and defines its behavior during operation and thus the processing of the paper web by this processing unit.

[0014] In particular, several paper rolls are fed into the corrugated board machine in two ways. Firstly, several paper rolls are fed into the corrugated board web, the paper webs of which are then joined together as different layers of the corrugated board web, i.e., several paper rolls for different layers are fed more or less simultaneously. Secondly, several paper rolls are fed into the corrugated board web sequentially to ensure continuous operation. This means that after one paper roll is used up, a new paper roll is fed in, thus ensuring that several paper rolls are fed for the same layer.

[0015] The paper rolls are each characterized by a number of paper parameters, which have individual values ​​for each of the paper rolls, so that each of the paper rolls is individually characterized based on their values ​​for the paper parameters. To be more precise, the paper of a particular paper roll is characterized by a number of paper parameters, which have individual values ​​for each of the paper rolls, so that the paper of each paper roll is individually characterized based on its values ​​for the paper parameters. The paper parameters therefore specifically characterize the paper of a particular paper roll, but for the sake of simplicity, we will occasionally refer to just the paper roll below, although this will then mean its paper in particular. The values ​​of the paper parameters of an individual paper roll are also referred to as “paper data” and together form a data set for this paper roll.The paper parameters each describe, directly or indirectly, one or more properties of the paper on the paper roll, so that different values ​​mean or imply different properties accordingly. The term “paper parameters” is particularly broadly defined and refers not only to the physical, mechanical or chemical properties of the paper itself, but also to any information that enables the paper to be characterized, e.g., place of manufacture, time of manufacture, storage time of the paper or operating parameters of a paper machine during paper production, and the like. In a suitable embodiment, the paper data are averaged values ​​or spatially and / or time-resolved values ​​(e.g., spatially resolved moisture along the length and width of the paper web) or a combination thereof.Which paper parameters are used is initially irrelevant; what's more important here is that the paper parameter values ​​are unique for each paper roll. For example, the paper parameter is the fiber orientation of the paper in the paper roll, and the corresponding value is a for a first paper roll, b for a second paper roll, and c for a third paper roll.

[0016] The value of the paper parameter is therefore individual for each paper roll (more precisely: its paper), although this does not mean that two paper rolls do not have the same value for a particular paper parameter. As a rule, however, the paper in two paper rolls differs in one or more of the paper parameters due to their production, storage, transport, etc. and therefore has different properties. This individuality of the paper rolls is taken into account when operating the corrugated board plant and thus when processing the paper rolls, and is used to optimize the production of the corrugated board web. For this purpose, the operating parameters of the corrugated board plant are set depending on the values ​​of the paper parameters (i.e. depending on the paper data), so that the production of the corrugated board web is individually adapted to the paper roll (i.e. its paper) being processed at a given time.In other words: since the properties of paper regularly differ from paper roll to paper roll (and possibly even across a single paper roll), the operation of the corrugator is adapted accordingly to the paper roll in use, preferably on a recurring and / or continuous basis. The paper data is not, or not exclusively, determined in the corrugator, but rather beforehand and, in particular, away from and independently of the corrugator. The paper data advantageously includes the history and / or previous life of the paper in the paper roll, so that the paper data represent, so to speak, a life history of the paper roll.In particular, the paper data does not necessarily only contain those paper parameters that could also be determined inline in the corrugator, but advantageously also those paper parameters that, due to their nature, cannot be determined within the corrugator, e.g. paper production process parameters. The method presented here is therefore dynamic in that individual properties of the paper roll are taken into account. The above applies analogously to the simultaneous processing of several paper rolls, whose paper data are then used jointly to set the operating parameters. The paper parameters themselves - and thus the paper data as a whole - are static, i.e. constant for the paper of an entire paper roll, or dynamic, i.e. vary along the paper of the paper roll, so that, for example,a parameter curve is created depending on the section of the paper web currently being unrolled. A combination is also possible, so that one or more paper parameters are static and one or more other paper parameters are dynamic.

[0017] In this case, without loss of generality, it is assumed that there are multiple paper rolls, each with multiple paper parameters, and that multiple operating parameters are also set depending on the paper parameters. This is generally preferred.

[0018] What is advantageous in this case is that the paper parameters of a particular paper roll are used to set the operating parameters of the corrugator and are thus used directly to set the operating parameters and thus also to control the corrugator. This is in contrast to US 11,162,226 B2 mentioned at the beginning, in which a particular paper roll is first assigned a hygroexpansivity attribute based on a comparison with other paper rolls, on the basis of which the conditioning within the corrugator is then set. Thus, there is no setting of the operating parameters dependent on the specific properties of a particular paper roll. Furthermore, there is an assignment using a purely data-based model that is correlated across several corrugator lines from different corrugator manufacturers and whereby the operating parameters of the corrugator lines are essentially compared with one another.However, similar or even unchanged paper data are assumed (e.g., the same manufacturer or the same production slot). In other words, the approach in US Pat. No. 11,162,226 B2 aims to utilize data from different corrugating lines, whereas the present invention aims to utilize paper data from paper rolls with regularly varying paper properties, possibly even for only a single corrugating line.

[0019] Generally speaking, certain paper parameters of a paper roll have not been used outside of the corrugator to control the corrugator, even if these paper parameters were known. This is not initially necessary either, because by focusing only on the corrugated board layer itself, feedback control is also possible, in which the operating parameters are readjusted based on the corrugated board web produced. However, such a reaction and the subsequent adjustment inevitably lead to rejects or at least a suboptimal product being produced in the meantime, which reduces the profitability of the corrugator. In contrast, the corrugator presented here has an advantageously shortened control loop due to the use of paper parameters for control.Since the values ​​of the paper parameters are known very early on in operation, and in particular before the paper roll is even processed, the controlled system reacts accordingly and proactively to any changes in the values ​​of the paper parameters. The controlled system here is therefore particularly a feedforward control. In a feedback control, on the other hand - as already described - the manufactured output product (the corrugated board web) would be examined and the operating parameters would then be controlled retroactively based on this, i.e. the output product provides the input signal for the controlled system. In the feedforward control described and advantageously used here, on the other hand, the input product (the paper roll) provides the input signal for the controlled system in order to control (or more precisely: to regulate) the operating parameters and obtain a specific output product.

[0020] Preferably, the values ​​used for the paper parameters of a single paper roll are aggregated as much as possible, i.e., received by the corrugator from as few different sources as possible and preferably only from a single source, thus forming as much of a consolidated data set as possible. The paper data is therefore preferably not transferred to the corrugator at different points in time and / or at different times, but rather collected in a single data set and / or at a single time. Optionally, the paper data of several paper rolls can even be aggregated in a similar manner, in such a way that individual values ​​can still be assigned to a single paper roll, expediently using an ID for each paper roll.

[0021] The invention initially makes use of the observation that the properties of the paper in a paper roll are fundamentally determined by its production and can then change further as a result of its development (transport, storage, etc.). By the time the paper roll is actually fed into the corrugator and processed therein, the values ​​of the paper parameters of a particular paper roll have developed according to its individual life cycle, so that essentially no two paper rolls are completely identical. By treating different paper rolls largely identically up until processing, it is fundamentally possible to keep the properties of these paper rolls as similar as possible, so that processing with the same operating parameters leads to tolerable fluctuations in the quality of the corrugated board web.In practice, this may be sufficient in many cases, but in any case it requires compliance with certain tolerances during paper production.

[0022] The invention now additionally taps into the potential that arises from the fact that the properties of the paper on each paper roll are actually taken into account individually, so that even small differences are compensated for by appropriately adjusting the operating parameters, in order to produce a corrugated board web of maximum quality starting from a paper roll with given properties. A further advantage of the invention described here is that paper rolls can be produced with greater tolerances, since any deviations from values ​​defined as ideal for the paper parameters are now optimally compensated for during operation of the corrugator. This makes paper and paper rolls in general easier and more cost-effective to produce. Furthermore, paper rolls that would previously have been rejected due to severe defects can now also be used.It is now also possible to use paper rolls that are not typically intended for the production of corrugated board. Thanks to the now known paper data and its applications, essentially any paper roll can be optimally and purposefully used for the production of corrugated board. Ultimately, this makes paper and paper rolls in general more cost-effective to produce or procure, with corresponding benefits for the corrugated board web.

[0023] In this case, the individual properties of the paper on a paper roll are profitably used to optimize the process control of the corrugator. In other words, the individual properties of a paper roll are used to control the corrugator, so that its operation is then dependent on the individual values ​​of the paper parameters of each paper roll. The corrugator is thus controlled on a roll-by-roll basis. This requires, in particular, that the paper data for each paper roll is known and available before its processing, preferably as early as possible, and therefore not only determined immediately before a respective processing station using corresponding sensors. Preferably, the paper data is already known before the paper on a paper roll is fed into the corrugator.Alternatively or additionally, the paper parameter values ​​of a particular paper roll are measured using suitable sensors within the corrugator, not immediately before or even after a respective processing unit, but already while the paper roll is unwinding in the unwinder or immediately afterward, i.e., before the paper web is processed in a processing unit (e.g., printer, single facer, preheater, gluing unit). Accordingly, the method presented here differs from inline measurement precisely in that the paper data of the paper roll is supplied in advance and, in particular, is also used, rather than only when needed or subsequently. This avoids suboptimal products and rejects.

[0024] A particular advantage is that the paper data can be used to check the plausibility, calibrate, or test sensors in the corrugator, and is expediently used for this purpose. The value of a paper parameter is then determined using a sensor in the corrugator and compared with the value stored for this paper parameter in the paper data. Based on this, at least the aforementioned options for action: checking the plausibility, calibrating, and testing the sensor arise. For example, moisture sensors in the corrugator exhibit a measurement inaccuracy, which is corrected and / or correlated using the paper parameter "moisture" from the paper data of the paper roll.

[0025] A further advantage is that the energy requirement for producing a corrugated cardboard web from the respective paper roll (i.e. for processing the paper roll) can be determined using the paper data, preferably the temperature and humidity of the paper. Accordingly, in an expedient embodiment, an energy requirement is determined based on the paper data of a paper roll, which indicates how much energy is needed to produce a corrugated cardboard web from the paper roll. Preferably, values ​​for the operating parameters are selected based on a rule that links the values ​​of the paper parameters with the values ​​for the operating parameters in such a way that a quality measure for the corrugated cardboard web is changed, in particular improved, in particular maximized. The quality measure is basically arbitrary; an example of a suitable quality measure is the extent of bending of the corrugated cardboard web, also referred to as "warp", or the proportion of rejects, i.e.which portion of the corrugated board web cannot be used as intended due to defective manufacturing. Another suitable quality measure is a strength value of the corrugated board web, in particular edge crush resistance (e.g. according to ECT = Edge Crush Test), flat crush resistance (e.g. according to FCT = Flat Crush Test) or the like, and generally any corrugated board property. A combination of several quality measures is also advantageous. The rule is learned in a suitable embodiment, i.e. it is generated in advance in a learning process in which the quality measure is measured as a function of the paper parameters and the operating parameters. The rule is then derived from this function. Various approaches are suitable for the learning process; the details are not important here.

[0026] In this case, the operating parameters are advantageously set not only indirectly, but directly depending on the values ​​of the paper parameters. The previously described rule is in particular a function for which the paper parameters are then input parameters and for which the operating parameters are correspondingly output parameters. The values ​​of the paper parameters are converted by the corrugator directly into suitable values ​​for the operating parameters in accordance with the rule, in particular a predefined one, and these values ​​are then also set. A determination of intermediate parameters is preferably not carried out. This is in contrast to US 11,162,226 B2 mentioned at the beginning, in which the hygroexpansivity attribute is first determined for a given paper web in order to then obtain suitable operating parameters for conditioning the paper web on this basis.This is unnecessary in this case, as the aforementioned rule directly links the paper parameters with the operating parameters, thereby eliminating the need for corresponding calculations and preliminary considerations. This is based in particular on the realization that knowledge of the causal relationships or causalities is not important, but rather that it is sufficient to determine the rule empirically in advance through appropriate experiments, training procedures and / or a big data approach. In this respect, the rule itself is not necessarily known, but rather a type of black box that merely outputs corresponding values ​​for the operating parameters for given paper data. For example, the rule is implemented by a neural network or the like, e.g. in a virtual sensor. In principle, various solutions are conceivable and suitable, which achieve similar or identical results in different ways.

[0027] Which paper parameters are actually used is initially of secondary importance and becomes less relevant as the number of paper parameters increases. Accordingly, at least 10 paper parameters are preferably used, in particular at least 100. The total volume of paper data results primarily from the number of values ​​stored for the respective paper parameters. A static paper parameter contains only a single value (e.g. running meters on the paper roll, production date or mean value of a dynamic paper parameter), whereas a dynamic paper parameter contains a large number of values ​​(e.g. moisture as a function of width and length of the paper roll), which depends in particular on the value density / sampling rate (e.g. 1 / cm) and is regularly in the range from 1,000 to 1,000,000 or more.The paper parameters do not necessarily have to have a directly identifiable, causal relationship to the quality measure for the corrugated board web. Especially with the aforementioned big data approach, knowledge of relationships is of secondary importance. However, some paper parameters regularly have a greater influence on the quality of the corrugated board web than others and are therefore used preferentially, especially when only a few (i.e., a maximum of 10) paper parameters are used. Therefore, in a suitable embodiment, one or more of the paper parameters are selected from the following paper parameters: fiber orientation of the paper in the paper roll, failure stress of the paper in the paper roll.

[0028] In a practical embodiment, two of the paper rolls fed to the corrugator for simultaneous processing are selected such that they differ from each other by no more than a maximum value in at least one of the paper parameters. In other words, two of the paper rolls that are also processed simultaneously are as similar as possible. The adjustment of the operating parameters depending on the values ​​of the paper parameters is simplified by selecting paper rolls that are as similar as possible. This is particularly advantageous with regard to moisture content. Accordingly, in a suitable embodiment, one of the paper parameters is the moisture content of the paper in a particular paper roll.It is then expedient to select two additional paper rolls (which are fed to the corrugator for simultaneous processing) such that their moisture contents do not differ from one another by more than a maximum value, in particular 2% (relative to one another). In other words: paper rolls with as similar moisture contents as possible are selected. The two paper rolls are then processed simultaneously and form, in particular, different layers of the corrugated board web, preferably two outer layers of the corrugated board web, i.e., a top side and a bottom side. This is based on the consideration that if the moisture deviation is too great, i.e., a deviation which is greater than the maximum value, the production of a corrugated board web may no longer be possible or at least cannot be guaranteed with sufficient quality.Since the paper parameters are advantageously accessible in this case, it is possible to select the paper rolls in such a way that they optimally match each other, especially with regard to the respective moisture content of the paper as described.

[0029] Particularly preferably, at least one of the paper parameters is a dynamic paper parameter whose values ​​are specified as a function of the width and / or length of the paper web of the paper roll. In contrast, static paper parameters have the same value along the entire paper web. Suitable dynamic paper parameters are: fiber orientation as a function of a width and / or length of the paper web, temperature as a function of a width and / or length of the paper web, e.g. in the form of a "heat map", which indicates the temperature at a respective point on the paper web, and humidity as a function of a width and / or length of the paper web, analogously e.g. in the form of a "moisture map". A dynamic paper parameter is characterized by the fact that it potentially has different values ​​at different points on the paper web and therefore describes an inhomogeneity of the paper roll.Using one or more dynamic paper parameters results in a more detailed image of the paper roll, which is advantageously used when adjusting the operating parameters. The operating parameters are then adjusted dynamically accordingly.

[0030] It is also expedient to use papermaking process parameters, i.e. process parameters that were used in the production of the paper of a respective paper roll itself. The papermaking process parameters are not immediate, direct properties of the paper (such as moisture, fiber orientation, length, width, etc.), but rather parameters of the production of the paper and thus merely indirect or indirect paper parameters. In a suitable embodiment, the paper parameters accordingly comprise a number of papermaking process parameters that were used in the production of the paper roll. The papermaking process parameters are, in particular, operating parameters of a paper machine for producing the paper roll and / or for producing the paper of the paper roll.The papermaking process parameters are used to expediently determine a correlative relationship between the production of the corrugated board and the production of the paper used in it, which may not be apparent in the direct paper parameters. Subsequent determination of other paper parameters such as failure stress and fiber orientation, temperature, humidity, and the like may therefore be unnecessary, so that in an advantageous embodiment these are omitted entirely or partially. This utilizes the knowledge that ultimately the production of the paper roll significantly influences its properties and that production, in turn, is significantly influenced by the papermaking process parameters. Therefore, these are advantageously used directly to adjust the operating parameters of the corrugator.

[0031] Suitable paper parameters are listed below: a) Paper roll properties

[0032] - (exact) sleeve outer diameter

[0033] - (exact) running meters on the paper roll

[0034] - Splice points in the paper roll b) Development of the paper

[0035] - Production date

[0036] - Manufacturer name

[0037] - Place of manufacture

[0038] - Date of manufacture

[0039] - Storage time

[0040] - Storage conditions (e.g. humidity and / or ambient temperature)

[0041] - Transport time

[0042] - Transport conditions (e.g. humidity and / or ambient temperature) c) Basic properties of the paper

[0043] - Humidity / moisture content

[0044] - mass per unit area

[0045] - Thickness

[0046] - Ash content

[0047] - Fiber orientation (also fiber orientation angle) d) Tensile properties of the paper

[0048] - Breaking strength

[0049] - Tear length

[0050] - Elongation at break

[0051] - Elastic modulus e) Surface printability properties of the paper

[0052] - Smoothness, e.g. according to Bekk

[0053] - Roughness, e.g. according to Bendtsen - Air permeability, e.g. according to Bendtsen / Gurley f) Corrugated board properties (especially corrugated board base paper properties)

[0054] - Flat crush resistance (e.g. according to CMT = Concora Medium Test, FCT = Flat Crush Test or similar)

[0055] - Strip crush resistance (e.g., according to SCT = Short Crush Test). The above list indicates preferred paper parameters, but is not intended to be exhaustive. Using only a subset of the paper parameters mentioned is already advantageous, but it is particularly useful to use as many paper parameters as possible.

[0056] Regardless of whether a paper parameter is static or dynamic, those paper parameters that change as little as possible, or not at all, during the paper roll's lifetime, i.e., until it is processed in the corrugator, are particularly suitable. For example, the temperature of a paper roll typically changes during transport from the paper mill to the corrugator and is therefore less suitable (but not entirely unsuitable). Humidity is less problematic than temperature, but also fundamentally changes over time. In contrast, the fiber direction (possibly even as a dynamic paper parameter as a function of width and length) remains unchanged and is therefore particularly suitable.

[0057] Determining the paper parameter values ​​is not necessarily a component of the method for operating the corrugator described here. It is advisable to determine at least one, and preferably all, of the paper parameter values ​​for a particular paper roll in advance, namely before this paper roll is fed into the corrugator. The paper parameter values ​​are thus known before the corrugator is fed with the paper roll and therefore only need to be transmitted to the corrugator to set the operating parameters. This ensures uninterrupted and fully automated operation.

[0058] Suitably, the values ​​of the paper parameters of a particular paper roll were determined during its production, especially in the case of the paper production process parameters mentioned above. Alternatively or additionally, the values ​​of the paper parameters of a particular paper roll were determined after its production, in particular by means of a laboratory test. In general, it is advantageous if at least some of the paper parameters are determined during or immediately after production, and in particular by the manufacturer of the paper roll itself, and stored appropriately, e.g., on a data carrier, for later transmission to a corrugator.

[0059] It is advantageous to update one or more paper parameters using paper data that describes the life cycle of the paper roll, in particular up to the actual processing in the corrugator. The paper data then contains, on the one hand, one or more paper parameters that vary over time (e.g., temperature or humidity) and, in addition, logistics data (i.e., storage, transport and / or tracking data, e.g., transport duration, transport conditions, storage duration, storage temperature, etc.). The time-varying paper parameter is stored, for example, during or after the production of the paper roll and before its removal from the paper mill and is then subject to further changes due to the storage and transport of the paper roll. This change is then tracked using the logistics data in order to then update the paper parameters (i.e.,recalculate), preferably immediately before or during processing in the corrugator. In a suitable embodiment, a temperature and humidity logger travels with the paper roll on a truck, and the initial paper parameters temperature and humidity from the paper mill are then updated with recorded data from the temperature and humidity logger, e.g., enriched, and corrected using a suitable model (e.g., temperature distribution calculations and diffusion equations).

[0060] The corrugator advantageously has a data interface via which the values ​​of the paper parameters of a particular paper roll are transmitted to the corrugator. The values ​​are transmitted before, during and / or after feeding the corrugator, advantageously even before the paper roll is unwound for processing. In principle, however, it is sufficient if at least those values ​​are transmitted immediately before a particular processing station that are specifically required for processing the incoming paper web into this processing station in order to set the operating parameters assigned to this processing station. In keeping with the forward-looking approach preferred here, however, all values ​​are preferably transmitted together as a single, aggregated data set via the data interface and are then immediately available.

[0061] In a particularly preferred embodiment, each paper roll is assigned a data carrier on which the individual values ​​of the paper parameters of the respective paper roll are stored. Each data carrier is thus assigned to exactly one paper roll and, in particular, contains only the paper data of a single paper roll. To set the operating parameters depending on the paper parameters, the data carrier is preferably read by the corrugator. For this purpose, the corrugator has a suitable reader. The reader is, in particular, part of the data interface already mentioned. The data carrier is suitably a code, e.g. a QR code or barcode, a transponder, e.g. an RFID tag or NFC tag, or a volatile or non-volatile memory, e.g. a floppy disk, a CD, or a flash memory. The reader is accordingly, for example, a scanner, a receiving unit with an antenna, a drive, a USB port, or the like.The data carrier provides an offline solution in which the values ​​of the paper parameters are transmitted to the corrugator without the corrugator having to be connected to the Internet or another network in order to receive the data set for a particular paper roll.

[0062] The data carrier is either attached to the paper roll or is provided separately from it. According to one embodiment, the data carrier is a label or a type of data sheet for the paper roll and is also referred to as a “roll tag”. The data carrier can also advantageously be shipped together with the paper roll. Accordingly, in an advantageous embodiment, the data carrier is attached to the paper roll, e.g. directly to its paper web or to a packaging of the paper roll, e.g. glued or printed directly to the paper or to the core. This makes assignment and handling of the data set particularly uncomplicated. For example, the data carrier is a code that is attached to the paper roll and which is read by a reader on the corrugator when it is fed into the corrugator.

[0063] In principle, it is conceivable for a paper roll to be used multiple times (e.g. three times), i.e. after being fed into the corrugator, it is not necessarily used up completely, but only partially, and then removed from the corrugator and stored again. If required, the now partially used paper roll is then fed back into the corrugator at a later time. The data carrier is therefore preferably designed such that it is reliably linked to the paper roll even when the paper roll is fed to and removed from the corrugator several times. In a suitable embodiment, the data carrier is detachable for this purpose and is removed when the paper roll is fed in and then attached to the paper roll again when it is removed and subsequently stored.In another suitable embodiment, the data carrier is attached to the paper roll in such a way that the data carrier does not have to be removed, i.e. it remains on the paper roll when it is processed in the corrugator. For this purpose, the data carrier is expediently attached in the center, in particular on or in a core of the paper roll. Contactless or electronically readable data carriers such as RFID and NFC tags and the like are particularly suitable for this purpose. Overall, this ensures that the paper parameters are available over the entire useful life of a paper roll, even if it is used multiple times. The statements regarding the data carrier apply analogously to the ID already mentioned, which is described in more detail below.

[0064] Updating the paper parameters is particularly advantageous for paper rolls that are used multiple times. In a suitable embodiment, one or more of the paper parameters of a paper roll are updated if this paper roll is only partially used and is removed from the corrugator and stored temporarily for later reuse, in particular away from the corrugator, e.g. in a roll storage area. The update is either a change to an existing paper parameter or the addition of a new paper parameter. For example, it is useful to update the length of the paper, i.e., storing the remaining length of paper, or the diameter of the paper roll and, in principle, all properties of the paper roll that change during processing in the corrugator. A suitable newly added paper parameter, for example, is an unwinding direction, i.e.,the direction in which the paper roll was unwound during processing (especially in the case of paper from which a flute for a corrugated board web is made). A particularly advantageous embodiment is one in which one or more operating parameters of the corrugator that were used when processing the paper roll are saved when the paper parameters are updated, so that when the paper roll is used again, the last operating parameters used for this paper roll are immediately accessible and usable. Once selected, the operating parameters are inherited, so to speak. Alternatively or additionally, the update saves information about the other paper rolls with which the paper roll was processed together and, optionally, also the operating parameters under which this occurred. In this way, operating parameters are learned that are particularly advantageous when used in conjunction with such or similar paper rolls (e.g. from the same batch).The update is performed primarily using a writing device on the corrugator. Optionally, the reading device and the writing device can be combined to form a single reading and writing device.

[0065] Alternatively or in addition to the aforementioned offline solution, an online solution is also generally advantageous, e.g. a cloud solution. Such an online solution has the particular advantage that the determination of paper parameters, e.g. by means of a laboratory test, is possible in parallel (i.e. at the same time) as the transport of the paper roll, and the paper parameters are then transmitted online. In a suitable embodiment, at least a subset (one or more), in particular each, of the paper rolls has a particularly individual ID (also referred to as an identifier or identification mark), which is stored together with the paper data of the respective paper roll in a database, e.g. a data lake. In a suitable embodiment, the database is part of a cloud. The ID is used to assign a specific paper roll to its paper data, which is then determined and / or stored independently of the paper roll.The use of an ID to assign a paper roll to a data record from a set of multiple aggregated data records has already been outlined above. In a suitable embodiment, the database is separate from the corrugator and connected to it for data transfer, e.g., via the Internet or another network. A configuration in which the database is part of the corrugator is also suitable. The database is connected either to a single corrugator or, alternatively, to multiple corrugator systems. The corrugator system requests the paper data for a particular paper roll from the database using its ID. As soon as the corrugator system has received the values, the operating parameters are set accordingly.In principle, it is also possible for the regulation used here to be stored in the database, which then directly transmits the corresponding values ​​for the operating parameters when the corrugator is requested for a given ID. Even with the online solution, the paper parameters are thus used directly to control the corrugator; the ID merely represents a pointer to the database to request the corresponding data set, which is not directly attached to the paper roll itself. The ID, however, is advantageously attached to the paper roll; accordingly, the statements regarding the data carrier also apply analogously to the ID.

[0066] A bi-directional interface between the corrugated board plant and a paper machine (or paper mill in general) is also advantageous. Via the bi-directional interface, paper data is then transmitted to the corrugated board plant in order to control it as described. On the other hand, corrugated board data is also transmitted to the paper machine via the bi-directional interface in order to control it. In a suitable embodiment, a basically symmetrical constellation is realized in which the corrugated board data, analogous to the paper data, contain corrugated board parameters of the corrugated board and thus describe properties of the corrugated board. The paper parameters mentioned in connection with the paper data are basically also suitable as corrugated board parameters. Alternatively or additionally, corrugated board-specific corrugated board parameters such as warp or gluing quality are advantageously used.The paper machine is then controlled using the corrugated board data. Here, too, the explanations for controlling the corrugated board line also apply analogously to the control of the paper machine, although in detail the paper machine is consequently controlled using different operating parameters than a corrugated board line. A particular advantage of the bidirectional interface is that defects and rejects in the corrugated board line are correlated with paper data from the paper roll processed there and reported back to the paper machine, whereupon the machine makes appropriate corrections (i.e., changes operating parameters accordingly) in order to produce paper that does not lead to, or at least to a lesser extent, the aforementioned defects or rejects.In other words, the paper machine receives feedback regarding the suitability of the paper produced by the paper machine, and depending on this feedback, the operating parameters of the paper machine are optimized with the aim of improving the subsequent production of corrugated board.

[0067] In a practical embodiment, the corrugator has one or more sensors by means of which the values ​​of the paper parameters of a respective paper roll are measured, in particular during operation, while this paper roll is accommodated in the corrugator and preferably before this paper roll is processed. This is also an online solution. According to our interpretation, processing begins as soon as the paper is unwound from an unwinder of the corrugator and in particular also includes one or more of the following processing steps: splicing, corrugating (with a corrugating roller), moistening, drying, printing, and gluing and / or joining to another paper web. In principle, all processing steps benefit from knowledge of the actual values ​​of the paper parameters, but in particular all processing steps after unwinding or splicing.Accordingly, it is sufficient if the sensors are arranged along the paper web downstream of the unwinder or splicer and upstream of any other processing units. It is also advantageous to integrate the sensors into the unwinder or splicer, so that the paper parameter values ​​are measured immediately before, during, or after unwinding / splicing.

[0068] Alternatively or in addition to one or more actual sensors as described above, in an advantageous embodiment the corrugator has a virtual sensor, also known as a soft sensor. The virtual sensor does not actually carry out any measurements in the corrugator; instead the paper data is fed to the virtual sensor, specifically those paper parameters that were determined outside the corrugator (e.g. during paper production). Optionally, one or more paper parameters that were determined as described using an actual sensor in the corrugator are also fed to the virtual sensor. A particularly advantageous embodiment is also one in which the aforementioned paper production process parameters are fed to the virtual sensor, since these cannot be measured in the corrugator itself due to their design.The virtual sensor then determines the operating parameters for the corrugator, particularly from the supplied paper data, and thus implements the aforementioned big data approach and / or the previously described rule for assigning the values ​​of the operating parameters to the values ​​of the paper parameters.

[0069] A corrugated board system according to the invention comprises a control unit configured to carry out a method as described above. The control unit is particularly configured to execute one or more of the described steps of the method. For this purpose, the control unit controls the processing units accordingly and thus sets the operating parameters.

[0070] The corrugator system suitably includes a job scheduling system. The job scheduling system allows for the proactive planning of operating parameter settings. This is enhanced by the individual paper parameter values ​​now available for each paper roll. The job scheduling system specifically queries the paper data for each paper roll, e.g., using a reader or an ID, and forwards this paper data to the control unit, which then appropriately adjusts the operating parameters and thus the individual processing units, especially as soon as the respective paper roll is processed.

[0071] A computer program product according to the invention comprises instructions which, when executed by a corrugated board plant, in particular as described above, cause the plant to select and adjust the operating parameters in a method as described above, depending on the values ​​of the paper parameters, so that the production of the corrugated board web is individually adapted to the paper of the respective paper roll fed in. In particular, the aforementioned rule for assigning the values ​​of the operating parameters to the values ​​of the paper parameters is also implemented with the computer program product. Suitably, the computer program product also comprises instructions which, when executed by a corrugated board plant, implement the aforementioned order planning system for the plant.

[0072] A paper roll according to the invention is used in particular for producing a corrugated cardboard web and is characterized, as described above, by a number of paper parameters with individual values. The paper roll has a data carrier on which the individual values ​​of the paper parameters are stored. The data carrier is designed such that it can be read by a corrugator in a method as described above, in particular in order to then control the corrugator based on the values ​​of the paper parameters. Alternatively or additionally, the paper roll has an ID for referencing the values ​​of the paper parameters in a database. The ID is designed to serve as a pointer for requesting the values ​​of the paper parameters from the database by means of a corrugator in a method as described above.

[0073] In the following, exemplary embodiments of the invention are explained in more detail with reference to a drawing. In each case, there is a schematic representation of: Fig. 1, a corrugated board plant,

[0074] Fig. 2 shows a variant of the corrugator from Fig. 1 .

[0075] 1 and 2 each show a corrugated board plant 2 to explain exemplary embodiments of a method for operating such a corrugated board plant 2. The corrugated board plant 2 is used to produce a corrugated board web 4 and, for this purpose, has a number of adjustable operating parameters 6. “A number of” is understood here and also very generally to mean “one or more” or “at least one”. An operating parameter 6 is set by selecting and setting a value for this operating parameter 6. The behavior of one or more processing units 8 of the corrugated board plant 2 is controlled by means of the operating parameters 6. Examples of the processing units 8 are the unwinder 10, splicer, printer, single facer, bridge, preheater, gluing unit, double facer, drying section, cutting unit, slitting unit, creasing unit and the like.

[0076] As part of the method, a number of paper rolls 12 are fed to the corrugated board plant 2, each containing a paper web from which the corrugated board web 4 is produced. Each paper roll 12 is formed by a rolled-up paper web, which is unwound from the corrugated board plant 2 by means of an unwinder 10 to produce the corrugated board web 4 and is suitably connected to further paper webs from further paper rolls 12. The processing units 8 then process the paper webs according to the operating parameters 6. In the figures, the path of the paper webs and the corrugated board web 4 through the corrugated board plant 2 is shown only in a highly simplified manner.

[0077] The paper rolls 12 are each characterized by a number of paper parameters 14, which have individual values ​​for each of the paper rolls 12, so that each of the paper rolls 12 is individually characterized based on its values ​​for the paper parameters 14 (also referred to as paper data). The paper parameters 14 each directly or indirectly describe one or more properties of the paper in the paper roll 12, so that different values ​​mean or imply different properties. As a rule, two paper rolls 12 differ in one or more of the paper parameters 14 due to their production, storage, transport, etc. This individuality of the paper rolls 12 is taken into account during their processing and used to optimize the production of the corrugated cardboard web 4.For this purpose, the operating parameters 6 are set depending on the values ​​of the paper parameters 14, so that the production of the corrugated cardboard web 4 is individually adapted to the respective paper roll 12. In the present case, the individual paper data of a paper roll 12 are therefore used to control the corrugator 2, so that its operation then depends on the individual values ​​of the paper parameters 14 of a respective paper roll 12. The values ​​used of the paper parameters 14 of an individual paper roll 12 are aggregated as far as possible, i.e., combined into a data set 16.

[0078] In the exemplary embodiments shown, values ​​for the operating parameters 6 are selected based on a rule 18, which links the values ​​of the paper parameters 14 with the values ​​for the operating parameters 6 in such a way that a quality measure for the corrugated cardboard web 4 is maximized. The rule 18 is, for example, learned, ie, it is generated in advance in a learning process in which the relationship between the operating parameter 6 and the paper parameter 14 is determined and the rule 18 is then determined directly from these data or indirectly via a function derived from these data.

[0079] In this case, the operating parameters 6 are set not only indirectly, but directly dependent on the values ​​of the paper parameters 14. The specification 18 is, for example, a function that has the paper parameters 14 as input parameters and the operating parameters 6 as output parameters. The values ​​of the paper parameters 14 are converted by the corrugator 2 according to specification 18 into suitable values ​​for the operating parameters 6, and these values ​​are then also set. It is preferable not to determine any intermediate parameters. Which paper parameters 14 are specifically used is initially of secondary importance and becomes less relevant as the number of paper parameters 14 increases. Accordingly, as many paper parameters 14 as possible are used here, e.g., at least 10 or even at least 100.However, some paper parameters 14 regularly have a greater influence on the quality of the corrugated board web 4 than others and are therefore used specifically in a possible embodiment. For example, one or more of the paper parameters 14 are selected from the following paper parameters 14: fiber orientation of the paper in the paper roll, failure stress of the paper in the paper roll 12.

[0080] In one possible embodiment, at least one of the paper parameters 14 is a dynamic paper parameter 14, whose values ​​are specified as a function of the width and / or length of the paper web of the paper roll 12. In contrast, static paper parameters 14 have the same value along the entire paper web of the paper roll 12. Suitable dynamic paper parameters 14 are humidity and temperature as a function of the width and / or length of the paper web of the paper roll 12.

[0081] Alternatively or additionally, the paper parameters 14 comprise a number of papermaking process parameters used in the production 20 of the paper of the paper roll 12. The papermaking process parameters are operating parameters of a paper machine of a paper mill for producing 20 the paper roll 12 or at least for producing the paper for the paper roll 12.

[0082] In the exemplary embodiment shown here, some or all of the values ​​of the paper parameters 14 of a respective paper roll 12 were determined in advance, namely before this paper roll 12 is fed to the corrugator 2. The values ​​of the paper parameters 14 are thus known before the corrugator 2 is fed with the paper roll 12 and accordingly only need to be transmitted to the corrugator 2 in order to set the operating parameters 6. In addition, at least some of the values ​​of the paper parameters 14 of a respective paper roll 12 were already determined during its production 20, specifically in the case of the paper production process parameters mentioned above. Alternatively or additionally, the values ​​of the paper parameters 14 of a respective paper roll 12 were determined after its production 20, e.g., by means of a laboratory test 22.For example, the paper parameters 14 of the paper roll 12 are determined and stored during or immediately after production 20 and, if necessary, by the manufacturer of the paper roll 12 itself.

[0083] In the illustrated embodiments, the corrugated board machine 2 has a data interface 24, via which the values ​​of the paper parameters 14 of a respective paper roll 12 are transmitted to the corrugated board machine 2. The values ​​are transmitted before, during, and / or after loading the corrugated board machine 2, e.g., before the paper roll 12 is unwound for processing.

[0084] In the embodiment of Fig. 1, each paper roll 12 is assigned a data carrier 26, on which the individual values ​​of the paper parameters 14 of the respective paper roll 12 are stored. Each data carrier 14 is assigned to exactly one paper roll 12 and here also contains only the values ​​of a single paper roll 12. To set the operating parameters 6 depending on the paper parameters 14, the data carrier 26 is read by the corrugator 2. For this purpose, the corrugator 2 has a suitable reader 28. The data carrier 26 implements an offline solution in which the values ​​of the paper parameters 14 are transmitted to the corrugator 2 without the latter having to be connected to the Internet or another network in order to receive the data set 16 for a respective paper roll 12. The data carrier 26 can be shipped with the paper roll 12 and is, in a sense, a label or a type of data sheet for the paper roll 12.In the embodiment shown here, the data carrier 26 is attached to the paper roll 12.

[0085] Alternatively or in addition to the offline solution, an online solution is also generally advantageous. An exemplary embodiment of this is shown in Fig. 2. There, each of the paper rolls 12 has an ID 30, which is stored in a database 32 together with the values ​​of the paper parameters 14 of the respective paper roll 12. The ID 30 is, for example, attached to the paper roll in the same way as the data carrier 26 in Fig. 1. The database 32 is either designed separately from the corrugator 2, as shown in Fig. 2, or is a part thereof (not shown). The corrugator 2 requests the values ​​of the paper parameters 14 of a respective paper roll 12 from the database 32 based on its ID 30. As soon as the corrugator 2 has received the values, the operating parameters 6 are set accordingly.In principle, it is also possible for the regulation 18 used here, if applicable, to be stored in the database 32, which then directly transmits the corresponding values ​​for the operating parameters 6 when the corrugator 2 is requested for a given ID 30. Thus, even with the online solution, the paper parameters 14 are used directly to control the corrugator 2; the ID 30 merely represents a virtual placeholder for the paper roll 12 and its paper data in order to query the associated data set 16.

[0086] In the embodiment of Fig. 1, the corrugated board system 2 has one or more sensors 34, by means of which some of the values ​​of the paper parameters 14 of a respective paper roll 12 are measured during operation. This paper roll 12 is already accommodated in the corrugated board system 2. This is also an online solution. Processing essentially begins with unwinding from the unwinder 10 and then includes all subsequent processing steps. In principle, all processing steps benefit from knowledge of the actual values ​​of the paper parameters 14, but especially any processing steps after unwinding or splicing. Accordingly, unlike what is shown in Fig. 1, it is sufficient if the sensors 34 are arranged along the paper web downstream of the unwinder 10 or the splicer and upstream of any other processing units 8. The solution with one or more sensors 34 is also applicable to the embodiment of Fig.2 applicable.

[0087] The respective corrugated board system 2 also has a control unit 36 ​​which is designed to carry out the described method. The control unit 36 ​​controls the processing units 8 accordingly and thus sets the operating parameters 6. Furthermore, the corrugated board system 2 in Fig. 2 also has a job planning system 38 with which the setting of the operating parameters 6 is planned in advance. The job planning system 38 queries, for example, as shown in Fig. 2, the values ​​of the paper parameters 14 of a respective paper roll 12 from the database 32 used using the ID 30 of a respective paper roll 12 and forwards these to the control unit 36, which then sets the operating parameters 6 and thus the individual processing units 8 as soon as the respective paper roll 12 is processed. A job planning system 38 is also possible in the embodiment according to Fig. 1.

[0088] The corrugated board plant 2 shown here also executes a computer program product for operation, with commands which cause the corrugated board plant 2 to select and adjust the operating parameters 6 as described in the described method, depending on the values ​​of the paper parameters 14, so that the production of the corrugated board web 2 is individually adapted to the respective paper roll 12 fed in.

[0089] Individual aspects which are only described or shown in connection with one of the embodiments can in principle also be transferred to the other embodiments independently of the other concepts contained in the respective embodiment.

[0090] List of reference symbols

[0091] 2 corrugated board lines

[0092] 4 corrugated cardboard web

[0093] 6 Operating parameters

[0094] 8 processing unit

[0095] 10 dispensers

[0096] 12 paper rolls

[0097] 14 Paper parameters

[0098] 16 data sets

[0099] 18 Regulation

[0100] 20 Production (of the paper roll)

[0101] 22 Laboratory examination

[0102] 24 Data interface

[0103] 26 data carriers

[0104] 28 reader

[0105] 30 ID

[0106] 32 database

[0107] 34 Sensor

[0108] 36 Control unit

[0109] 38 Order planning system

Claims

Claims Method for operating a corrugated board plant (2), - wherein the corrugated cardboard plant (2) serves to produce a corrugated cardboard web (4) and for this purpose has a number of adjustable operating parameters (6), - wherein a number of paper rolls (12) are fed to the corrugated board plant (2), each with a paper web of paper from which the corrugated board web (4) is produced, - wherein the paper rolls (12) are each characterized by a number of paper parameters (14) which have individual values ​​for each of the paper rolls (12), so that each of the paper rolls (12) is individually characterized based on its values ​​for the paper parameters (14), - wherein the operating parameters (6) are adjusted depending on the values ​​of the paper parameters (14), so that the production of the corrugated cardboard web (4) is individually adapted to the respective paper roll (12) fed in. The method according to claim 1, wherein values ​​for the operating parameters (6) are selected based on a rule (18) that links the values ​​of the paper parameters (14) with the values ​​for the operating parameters (6) in such a way that a quality measure for the corrugated cardboard web (4) is influenced, in particular improved, in particular maximized. The method according to claim 1 or 2, wherein one or more of the paper parameters (14) are selected from the following paper parameters (14): fiber orientation of the paper of the paper roll (12), failure stress of the paper of the paper roll (12). The method according to one of claims 1 to 3, wherein one of the paper parameters (14) is a moisture content of the paper of a respective paper roll (12), wherein two of the paper rolls (12) which are fed to the corrugator (2) for simultaneous processing are selected such that their moisture contents do not differ from one another by more than a maximum value. Method according to one of claims 1 to 4, wherein at least one of the paper parameters (14) is a dynamic paper parameter (14) whose values ​​are specified as a function of a width and / or length of the paper web of the paper roll (12). Method according to one of claims 1 to 5, wherein the paper parameters (14) comprise a number of papermaking process parameters which were used in the production (20) of the paper of a respective paper roll (12).Method according to one of claims 1 to 6, wherein the values ​​of the paper parameters (14) of the paper of a respective paper roll (12) were determined before this paper roll (12) is fed to the corrugated cardboard machine (2). Method according to one of claims 1 to 7, wherein the corrugated cardboard machine (2) has a data interface (24) via which the values ​​of the paper parameters (14) of the paper of a respective paper roll (12) are transmitted to the corrugated cardboard machine (2). Method according to one of claims 1 to 8, wherein each paper roll (12) is assigned a data carrier (26) on which the individual values ​​of the paper parameters (14) of the paper of the respective paper roll (12) are stored, wherein the data carrier (26) is in particular read out by the corrugated cardboard machine (2). Method according to claim 9, wherein the data carrier (26) is attached to the paper roll (12). Method according to one of claims 1 to 10, wherein at least a subset, in particular each, of the paper rolls (12) has an ID (30) which is stored in a database (32) together with the values ​​of the paper parameters (14) of the paper of the respective paper roll (12), wherein the corrugator (2) requests the values ​​of the paper parameters (14) of the paper of a respective paper roll (12) from the database (32) based on its ID (30). Method according to one of claims 1 to 11, wherein the corrugator (2) has one or more sensors (34) by means of which the values ​​of the paper parameters (14) of the paper of a respective paper roll (12) are measured while the latter is accommodated in the corrugator (2). Corrugated cardboard plant (2) which has a control unit (36) which is designed to carry out a method according to one of claims 1 to 12.A computer program product comprising instructions which, when executed by a corrugated cardboard system (2), cause the system, in a method according to one of claims 1 to 12, to select and adjust the operating parameters (6) depending on the values ​​of the paper parameters (14), so that the production of the corrugated cardboard web (4) is individually adapted to the paper of the respectively fed paper roll (12). - which is characterized by a number of paper parameters (6) with individual values, - which has a data carrier (26) on which the individual values ​​of the paper parameters (14) are stored and which is designed such that it can be read out by a corrugated cardboard plant (2) in a method according to one of claims 1 to 12, and / or - which has an ID (30) for referencing the values ​​of the paper parameters (14) in a database (32), wherein the ID (30) is designed to request the values ​​of the paper parameters (14) from the database (32) based on the ID (30) by means of a corrugator (2) in a method according to one of claims 1 to 12.

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