EP3594000A1 - Method for cleaning the surface of at least one rotating component of a printing machine from a printing fluid - Google Patents

Abstract

The invention relates to a method for cleaning the surface of at least one rotatable component of a printing press from a printing fluid, one of several predetermined cleaning processes being selected and carried out automatically, the selection based on a predetermined mathematical model (15) executed on a computer (10) ) takes place and when executing the model a size is calculated which corresponds to an amount of the pressure fluid (6a, 6b) located on the surface (8). The invention provides an improved cleaning method which can be used in all operating modes of the printing press and in particular enables savings in the consumption of detergent, washcloth and / or water.

Description

The invention relates to a method for cleaning the surface of at least one rotatable component, for. B. a cylinder or a roller, a printing press from a printing fluid, e.g. B. printing ink or fountain solution, with the features of claim 1.

Technical field and state of the art

The invention is in the technical field of the graphics industry and there in particular in the area of the automated cleaning of cylinders and rollers of inking and / or dampening units.

In printing machines, e.g. B. offset printing machines, printing fluids such as printing inks, varnishes and / or dampening solution are processed and printed on substrate, e.g. B. sheets of paper transferred. At given times, it is necessary to clean the cylinders and rollers of the printing presses from the printing fluids. This can e.g. B. may be necessary for a job change if the subsequent print job requires other inks.

The DE 197 05 632 A1 discloses a method for automatically controlled washing of at least a part of a printing unit of an offset printing machine. Here, for. B. signals corresponding to positions of individual ink metering devices, signals from a siphon roller or signals containing the speed of rotation of an ink fountain roller processed and the amount or amount of ink used according to known mathematical relationships. From this measure, a signal is generated according to a previously stored function of the frequency and / or the type of washing process as a function of the color consumption, which can be formed empirically or by model calculation, which is used to control the washing device is fed. Since the ink consumption is taken into account here, only a statement can be made about the condition of printing units that are in the printing operation. No statements can therefore be made regarding other operating modes and states of the printing units.

It has also been shown in practice that the machine operator often has to manually cancel an automatically started washing program since this does not deliver an optimal washing result under the current conditions in the printing unit. The operator must then start a washing program that is better from his point of view or experience. It is therefore not possible to employ inexperienced operators, and it is further disadvantageous that such interruptions by the operator take time and thereby increase the production costs. In addition, the operator can make mistakes when selecting washing programs.

task

It is therefore an object of the invention to provide a cleaning method which is improved compared to the prior art and which, in particular, enables automated, optimal cleaning results to be achieved in all operating modes of a printing press or its printing units, in particular in the operating modes: printing operation, printing pause, start-up of the Machine, sheet guiding without printing, makeready etc.

Solution according to the invention

This object is achieved according to the invention by a method with the features of claim 1. Advantageous and therefore preferred developments of the invention result from the subclaims and from the description and the drawings. The features of the invention, the developments of the invention and the exemplary embodiments of the invention also represent advantageous developments of the invention in combination with one another.

The invention relates to a method for cleaning the surface of at least one rotatable component, for. B. a cylinder or a roller, a printing press from a pressure fluid, e.g. B. a printing ink, a varnish or a dampening solution, and / or dirt, for example paper dust, one of several predetermined cleaning processes being selected and carried out automatically, the selection being carried out on the basis of a predetermined mathematical model executed on a computer and during execution a size of the model is calculated which corresponds to an amount of the pressure fluid located on the surface.

The invention provides an improved cleaning method, which achieves optimal cleaning results in particular in all operating modes of a printing press or its printing units.

It is a further advantage of the invention that in the model-based calculation no calculation is carried out based on color consumption. Instead, a size is calculated which corresponds to an amount of the pressure fluid located on the surface. In addition, a size can also be calculated which corresponds to a duration of action of the pressure fluid on the rotatable component, e.g. the number of revolutions of the rotatable component and / or machine revolutions.

Further advantages of the invention result from the saving of detergent, washcloth and / or water and in particular from a shortening of the time in setup processes. The invention also has the advantage that the use of the wrong detergents and the problems associated with them can be avoided.

Developments of the invention

• Das Reinigen erfolgt bevorzugt als ein Waschen bzw. als ein Waschvorgang, besonders bevorzugt unter Einsatz von Wasser und/oder Waschmittel und ggf. eines Waschtuchs.
• Beim Durchführen der Reinigungsvorgänge wird jeweils bevorzugt Reinigungsmittel aufgetragen und zusammen mit dem Fluid und/oder dem Schmutz entfernt.
• Die vorgegebenen Reinigungsvorgänge sind bevorzugt auf dem Rechner abgelegt und werden bevorzugt durch eine vom Rechner ansteuerbare Reinigungsvorrichtung ausgeführt.
• Die vorgegebenen Reinigungsvorgänge weißen bevorzugt jeweils eine individuelle Reihe von aufeinander folgenden Reinigungsschritten individueller Dauer auf, z.B. Waschen, Spülen und/oder Trocknen. Es können auch mehrere, ggf. wechselnde Zyklen solcher Reihen vorgesehen sein.
• Das automatisierte Auswählen erfolgt bevorzugt durch den Rechner.
• Das mathematische Modell kann bevorzugt auf einem bekannten, allgemeinen Modell beruhen, welches speziell an den konkreten Aufbau der Druckmaschine und/oder deren Druckwerk/Druckwerke angepasst ist. Es kann eine rechentechnische Simulation der Druckmaschine darstellen, wobei wenigstens die relevanten, d.h. Fluid tragenden und übertragenden Komponenten der Maschine sowie der Bedruckstoff simuliert werden. Die Simulation kann dabei bevorzugt die Übertragung von Fluid und/oder Schmutz abbilden.
• Die berechnete Größe wird bevorzugt verwendet, um einen von mehreren vorgegebenen Reinigungsvorgängen auszuwählen. Es können bevorzugt auch mehrere solcher Größen berechnet und gemeinsam verwendet werden. Beispielsweise kann auf dem Rechner eine Tabelle hinterlegt sein, welche eine Zuordnung zwischen der berechneten Größe bzw. den berechneten Größen (oder jeweiligen Größenbereichen) und den vorgegebenen Reinigungsvorgängen darstellt.
• Die berechnete Größe kann bevorzugt die auf der Oberfläche der zu reinigenden, rotierbaren Komponente befindlichen Menge des Druckfluides sein, z.B. deren Schichtdicke.
• Das Ausführen des Modells kann bevorzugt zeitlich parallel zum Betrieb der Druckmaschine, z.B. parallel zum Ausführen eines Druckauftrages, erfolgen.
• Das Verfahren kann bevorzugt den Startzeitpunkt des Reinigens und/oder seine Dauer auswählen.
• Das Verfahren kann berücksichtigen, dass über den Bedruckstoff Druckfluid von einem Druckwerk zu einem nachgeordneten Druckwerk gelangt.
• Das Verfahren kann Teil eines Steuerverfahrens der Druckmaschine sein.

Preferred developments of the invention can be characterized by one or more of the features listed below:

• The cleaning is preferably carried out as a washing or as a washing process, particularly preferably using water and / or detergent and optionally a washcloth.
• When performing the cleaning processes, cleaning agent is preferably applied and removed together with the fluid and / or the dirt.
• The predetermined cleaning processes are preferably stored on the computer and are preferably carried out by a cleaning device which can be controlled by the computer.
• The specified cleaning processes preferably each have an individual series of successive cleaning steps of individual duration, for example washing, rinsing and / or drying. Several, possibly changing, cycles of such rows can also be provided.
• The automated selection is preferably carried out by the computer.
• The mathematical model can preferably be based on a known, general model which is specifically adapted to the specific structure of the printing press and / or its printing unit / printing units. It can represent a computational simulation of the printing press, with at least the relevant, ie fluid-carrying and transmitting components of the press and the printing material being simulated. The simulation can preferably represent the transfer of fluid and / or dirt.
• The calculated size is preferably used to select one of several predetermined cleaning processes. A plurality of such variables can preferably also be calculated and used together. For example, a table can be stored on the computer, which represents an association between the calculated size or the calculated sizes (or respective size ranges) and the predetermined cleaning processes.
• The calculated size can preferably be the amount of the pressure fluid located on the surface of the rotatable component to be cleaned, for example its layer thickness.
• The model can preferably be executed in parallel with the operation of the printing press, for example in parallel with the execution of a print job.
• The method can preferably select the start time of the cleaning and / or its duration.
• The method can take into account the fact that printing fluid passes from a printing unit to a downstream printing unit via the printing material.
• The method can be part of a control method of the printing press.

A preferred development of the invention can be characterized in that the size represents a layer thickness of the pressure fluid.

A preferred development of the invention can be characterized in that the printing fluid has at least one printing ink, e.g. a UV-curable ink or a non-UV-curable or other conventional ink, or at least a fountain solution.

A preferred development of the invention can be characterized in that the mathematical model takes predetermined transmission rates for the pressure fluid between at least two rotatable components into account when calculating the size.

A preferred development of the invention can be characterized in that the mathematical model takes predetermined transmission rates for the printing fluid between each two of a plurality of rotatable components of a printing unit of a printing press into account when calculating the size.

A preferred development of the invention can be characterized in that the mathematical model takes predetermined transmission rates for the printing fluid between the printing material and at least one rotatable component into account when calculating the size.

A preferred development of the invention can be characterized in that the mathematical model takes into account predetermined transmission rates for the printing fluid between each two of a plurality of rotatable components of a plurality of printing units of the printing press when calculating the size.

A preferred development of the invention can be characterized in that the mathematical model takes into account a turning of the printing substrate when calculating the size.

A preferred development of the invention can be characterized in that the predetermined cleaning processes differ from one another by the use of different detergents.

A preferred development of the invention can be characterized in that the predetermined cleaning processes differ from one another in terms of their duration.

Figures and embodiments of the invention

The invention and its preferred developments are described below with reference to the drawings, ie Figures 1 to 3 , described in more detail using various preferred exemplary embodiments. Features corresponding to one another are provided with the same reference symbols.

Figur 1

ein bevorzugtes Ausführungsbeispiel eines erfindungsgemäßen Verfahrens,

Figur 2

ein weiteres bevorzugtes Ausführungsbeispiel eines erfindungsgemäßen Verfahrens; und

Figur 3

ein weiteres bevorzugtes Ausführungsbeispiel eines erfindungsgemäßen Verfahrens.

The figures show:

Figure 1

a preferred embodiment of a method according to the invention,

Figure 2

another preferred embodiment of a method according to the invention; and

Figure 3

another preferred embodiment of a method according to the invention.

Figure 1 shows a schematic representation of a printing unit 2 of a printing press 1, in particular an offset printing press, with a roller inking unit 3 and a dampening unit 4. The printing press prints sheets 5, e.g. B. from paper, cardboard, cardboard or plastic film, with at least one printing ink 6a. A preferred embodiment of the method according to the invention can be carried out with the printing press shown.

The printing press 1 comprises a plurality of rotatable components 7, e.g. B. cylinders and / or rollers and other components: ink fountain 18, ink fountain roller 19, first inking roller group 20, second inking roller group 21, dampening box 22, dampening unit roller 23 (immersion roller and / or metering roller), dampening application roller 24, plate cylinder 25, blanket cylinder 26 and impression cylinder 27.

The method according to the invention serves to clean surfaces 8 of at least one such rotatable component 7. The surface can be a cylinder surface or a roller surface; instead, it can be the surface of an elevator for the rotatable component, e.g. B. a rubber blanket surface.

Cylinders and / or rollers can also be combined into groups 7a and 7b, e.g. B. to a first inking roller group 7a and / or a second inking roller group 7b, which can each comprise several inking rollers. The grouping makes sense and simplifies calculations of the model, since the individual rollers of each group are always placed against each other.

When cleaning a pressure fluid, e.g. B. the ink 6a or a fountain solution 6b from the surface 8, preferably by washing and particularly preferably by washing with an aqueous detergent. When cleaning, dirt 6c, in particular paper dust, can also be removed from the surface.

The printing press 1 comprises a computer 10, e.g. B. a control computer. The computer is connected to at least one cleaning device 11 and controls its operation, that is, for. B. switching the cleaning device on and off, the intensity of the cleaning performed, its duration, the number of spraying operations with detergent, etc.

The cleaning device 11 can comprise a plurality of spray tubes 12; each spray tube can be connected to a detergent container 13. Different detergents 14 can be stored in the different detergent containers, e.g. B. Detergent for conventional offset inks or for UV inks. The cleaning device can additionally be a washcloth and / or a rotatable one Include cleaning brush and / or a squeegee. A plurality of cleaning devices 11 can also be provided within the printing press 1 or its printing units 2.

On the computer 10 is a dynamic mathematical model (or: simulation model) in digital form, for. B. stored as a computer program and executable. The model preferably represents the transfer of fluid or fluids in the printing press 1 and / or the printing unit or the printing units 2.

Figure 1 lets the respective transfer of a fluid 16, for. B. printing ink, varnish or dampening solution, or a mixture of such fluids, between two rotatable components, for. B. Cylinders, rollers or between the substrate and rotatable components shown as arrow 16: arrow with a single tip (transfer of printing ink and / or varnish), arrow with a black tip (transfer of dampening solution) and arrow with a white tip (transfer of dirt / paper dust).

The transfer 16 takes place between two rotatable components 7 in a respective contact strip 17 between the two components. The contact strips are preferably switchable, i. H. at least one of the two components can be switched on and off from the other component. The respective carry 16 can take place in a contact strip in one of the two possible transmission directions (from component a to component b or vice versa) or in both (from component a to component b and vice versa). An example: On the contact strip between the blanket cylinder 26 and the printing material 5, it can be seen from the arrangement of the arrows and their direction that printing ink and dirt are transferred from the printing material to the cylinder and printing ink and dampening solution from the cylinder to the printing material. The same applies to all other arrows.

The mathematical model 15 preferably forms the physical processes of fluid transfer, e.g. B. by fluid splitting, based on given formulas. For example, it can be assumed that a fluid layer in a contact strip 17 is split in half (50% of the fluid remains on component a and 50% is transferred to component b).

The mathematical model 15 accesses transmission rates A (preferably stored in the computer 10). Such transfer rates A are each dependent on a first rotatable component and a second rotatable component or on a rotatable component and a printing material and on their respective surface properties (acceptance and delivery behavior). These transmission rates for each contact strip 17 can preferably be stored in the computer or in the model as respective percentage values. The transfer of fluid (and also of dirt) between two rotatable components 7 can then be calculated in the model as follows: Transfer = A ^∗ (layer thickness on the first rotatable component - layer thickness on the second rotatable component). The same applies to the transfer between the printing substrate and a rotatable component. The first rotatable component is the source and the second rotatable component is the target for the transmission of the fluid. The calculations can be carried out iteratively and thereby depict changing states (fluid layer thicknesses). The calculations can also take cleaning processes into account, as a result of which the fluid layer thicknesses locally on the cleaned component (and on possible further components attached to this component) can drop to zero.

• Übertrag von Druckfarbe von der ersten Farbwalzengruppe 20 zum Plattenzylinder 25: A=5%;
• Übertrag von Druckfarbe vom Plattenzylinder 25 zum Gummituchzylinder 26: A=50%;
• Übertrag von Druckfarbe vom Gummituchzylinder 26 zum Bogen 5: A=10%;
• Übertrag von Feuchtmittel von der Feuchtauftragswalze 24 zum Plattenzylinder 25: A=50%; und
• Übertrag von Schmutz von Bogen 5 zum Gegendruckzylinder 27: A=30%.

Some examples are intended to illustrate this carryover:

• Transfer of printing ink from the first inking roller group 20 to the plate cylinder 25: A = 5%;
• Transfer of printing ink from plate cylinder 25 to blanket cylinder 26: A = 50%;
• Transfer of printing ink from the blanket cylinder 26 to the sheet 5: A = 10%;
• Transfer of dampening solution from the dampening roller 24 to the plate cylinder 25: A = 50%; and
• Transfer of dirt from sheet 5 to impression cylinder 27: A = 30%.

The mathematical model 15 can also take into account that each rotatable component 7 is assigned one or more maximum values (and are specified as such and stored in the computer 10), which indicate how much printing ink, The dampening solution and / or dirt can be stored at most on the surface 8 of the rotatable component 7.

• Dem Plattenzylinder 25 kann ein Wert max_Farbe=5 (Maximalwert für die Farbe) und ein Wert max_Feuchtmittel=5 (Maximalwert für das Feuchtmittel) zugewiesen sein.
• Der ersten Farbwalzengruppe 20 kann ein Wert max_Farbe=40 zugewiesen sein; und
• dem Bogen 5 können die Werte max_Farbe=1, max_Feuchtmittel=1 und max_Schmutz=1 (Maximalwert für den Schmutz/Papierstaub) zugewiesen sein.

Here are a few examples:

• A value max_color = 5 (maximum value for the color) and a value max_F damping agent = 5 (maximum value for the dampening solution) can be assigned to the plate cylinder 25.
• The first inking roller group 20 can be assigned a value max_color = 40; and
• sheet 5 can be assigned the values max_Farbe = 1, max_Fuchtmittel = 1 and max_Schmutz = 1 (maximum value for the dirt / paper dust).

The mathematical model 15 stands for everyone in Figure 1 arrow 16 shown corresponding A values available. The stored percentages can be determined in advance by measurements.

The mathematical model 15 makes it possible to calculate for each rotatable component 7 how much fluid (printing ink, dampening solution) and / or dirt is on the surface 8 at a specific point in time. This calculation can be carried out at any time or continuously updated. For this purpose, the transfer of fluid / dirt is calculated with the aid of a computer. H. a simulation of the real transfer is carried out on the computer. Therefore, the mathematical model can also be understood as a simulation model.

The method according to the invention allows one of a plurality of predetermined cleaning processes to be selected and carried out automatically on the basis of such a model or such a simulation. For this purpose, as already described above, the respective cleaning device 11 can have several spray tubes 12 and several detergent containers 13. Should z. If, for example, the first inking roller group 20 is washed, the mathematical model 15, or a corresponding simulation of the printing press 1 and its transfer of fluid / dirt, is used to calculate which fluid / which fluids and in what quantity (e.g. layer thicknesses) ) are present on the surfaces 8 of the rollers of the group at the time of cleaning start. A suitable detergent 14 is based on this selected, e.g. B. for conventional printing ink or for UV printing ink, and the amount of detergent and the duration of washing and, if necessary, other cleaning parameters selected.

The mathematical model 15 can take into account the "previous history" of the switching states between the rotatable components 7 (and the printing material 5) and thus represent the current state almost perfectly. For this purpose, the mathematical model 15 is supplied with all information relating to switching operations between the rotatable components 7 (and the printing material 5), for. B. Information about which component is made when and for how long (how many revolutions) to which other component.

In this way, the mathematical model 15 can propose an optimal, predetermined washing program. Alternatively, a specified washing program can be optimally adapted in this way.

Cleaning devices 11 can, for. B. be arranged on the following components: first inking roller group 20, second inking roller group 21, blanket cylinder 26 and / or impression cylinder 27.

1. 1. Ausgangszustand: Farbwerk, Feuchtwerk, Gummituchzylinder, Gegendruckzylinder sind gewaschen; Farbkasten ist leer.
2. 2. Bediener befüllt den Farbkasten mit Farbe.
3. 3. Automatischer Farbeinlauf wird durchgeführt.
4. 4. Aktueller Zustand: Farbe im Farbkasten, Farbe im Farbwerk, Platte eingefärbt, Gummituch sauber, Druckzylinder sauber.
5. 5. Fortdruck wird gestartet: Bögen laufen in die Maschine ein.
6. 6. Plattenzylinder und Gummituchzylinder werden aneinander angestellt.
7. 7. Aktueller Zustand: Farbe im Farbkasten, Farbe im Farbwerk, Platte eingefärbt, Gummituch einfärbt, Druckzylinder sauber.
8. 8. Erster Bogen erreicht das Druckwerk, Bogen wird bedruckt.
9. 9. Aktueller Zustand: Farbe im Farbkasten, Farbe im Farbwerk, Platte eingefärbt, Gummituch eingefärbt, Druckzylinder schmutzig.

Die Eingangsgrößen für das dynamische Modell sind dabei die aktuellen Schaltzustände der Druckwerkskomponenten. Jeder Schritt eines solchen Anwendungsfalls kann im Modell simuliert werden.A typical application is described below:

1. 1. Initial state: inking unit, dampening unit, blanket cylinder, impression cylinder are washed; Color box is empty.
2. 2. Operator fills the ink fountain with paint.
3. 3. Automatic ink run-in is carried out.
4. 4. Current condition: color in the ink fountain, color in the inking unit, plate colored, rubber blanket clean, printing cylinder clean.
5. 5. Production printing starts: Sheets run into the machine.
6. 6. Plate cylinder and blanket cylinder are put together.
7. 7. Current condition: color in the ink fountain, color in the inking unit, plate colored, rubber blanket colored, printing cylinder clean.
8. 8. First sheet reaches the printing unit, sheet is printed.
9. 9. Current condition: color in the ink fountain, color in the inking unit, plate colored, rubber blanket colored, printing cylinder dirty.

The input variables for the dynamic model are the current switching states of the printing unit components. Each step of such an application can be simulated in the model.

Figure 2 shows a further preferred embodiment of the invention for a printing press 1 with an anilox inking unit 3 (anilox inking unit). The inking unit includes (unlike in Figure 1 ) a squeegee ink fountain 28, an anilox roller 29 and an inking roller 30. Also for this embodiment, the mathematical model 15 can calculate the amount of fluid and / or amount of dirt on a certain rotatable component 7, e.g. B. on the inking roller 30, calculate or simulate at a given time and automatically select and perform an optimal washing program for cleaning this component.

Alternatively, the invention can also be used in coating units, inkjet printing units and in other sheet-guiding devices.

Figure 3 shows a further embodiment of the invention for a printing press 1 with several printing units 2. A sheet 5 with top 5a and bottom 5b is conveyed to a first printing unit 2, z. B. by means of cylinders. In the first printing unit, the top is printed with a color and this side thereby becomes the face printing side 5a. Then the sheet is conveyed to the second printing unit 2 and also printed on the face side 5a, preferably with a different color. Finally, the sheet 5 is conveyed further and turned, preferably by means of a turning device 31. In the third printing unit, the underside 5b is now printed with a color, as a result of which this page now becomes the reprint page 5b.

This exemplary embodiment clarifies that the mathematical model 15 can also take into account that fluid and / or dirt passes from the printing unit 2 from one printing unit 2 to another printing unit 2 and that “top” and "below" can be exchanged (with activated turn). In this way, a first color of a first printing unit 2 can reach a second printing unit 2 and mix there with the second color. Here, for. B. UV ink and conventional ink can also be mixed. In such cases in particular, it is advantageous that, according to the invention, an optimal cleaning program with an optimal selection of a detergent is carried out automatically.

The invention can also be used in sheet guiding without printing. The blanket cylinder 26 is employed in a printing unit 2 on the impression cylinder 27; however, the plate cylinder 25 is not set against the blanket cylinder 26. Sheets are transported but not printed by printing unit 2. The blanket cylinder 26, or its surface or elevator, is therefore only pressurized with fluid 6a, 6b from upstream printing units via the transported sheets. The layer thickness of the printing fluid on the blanket cylinder is therefore less than when the plate cylinder is switched on and an adapted and possibly shorter cleaning program can be selected automatically. The adapted cleaning program can also select a cleaning agent that is matched to the pressure fluid from the upstream printing units.

LIST OF REFERENCE NUMBERS

1

press

2

Printing / printing

3

inking

4

dampening

5

Sheet of printing material / printing material

5a

Top of the sheet / face side

5b

Bottom of the sheet / reprint page

6a

printing ink

6b

dampening solution

6c

Dirt / lint

7

rotatable component / cylinder / roller

8th

surface

10

computer

11

cleaning equipment

12

lances

13

detergent container

14

laundry detergent

15

mathematical model

16

Transfer of fluid / dirt

17

Contact strips

18

paintbox

19

Ink fountain roller

20

first ink roller group

21

second ink roller group

22

wet box

23

Pan roll

24

Dampener roller

25

plate cylinder

26

Blanket cylinder

27

Impression cylinder

28

Squeegee ink fountain

29

anilox roller

30

Inking roller

31

turning device

A

transmission rates

Claims (10)

Method for cleaning the surface of at least one rotatable component of a printing press from a printing fluid, wherein one of several predetermined cleaning processes is selected and carried out automatically, the selection takes place on the basis of a predetermined mathematical model (15) executed on a computer (10) and during Executing the model a size is calculated which corresponds to an amount of the pressure fluid (6a, 6b) located on the surface (8). Method according to claim 1,
characterized,
that the size represents a layer thickness of the pressure fluid (6a, 6b). Method according to one of claims 1 or 2,
characterized,
that the printing fluid (6a, 6b) is either at least one printing ink (6a) or a dampening solution (6b). Method according to one of the preceding claims,
characterized,
that the mathematical model (15) takes into account predetermined transmission rates (A) for the pressure fluid (6a, 6b) between at least two rotatable components (7) when calculating the size. Method according to claim 4,
characterized,
that the mathematical model (15) takes into account the predetermined transfer rates (A) for the printing fluid (6a, 6b) between two of a plurality of rotatable components (7) of a printing unit (2) of the printing machine (1) when calculating the size. Method according to one of claims 4 or 5,
characterized,
that the mathematical model (15) takes into account predetermined transmission rates (A) for the printing fluid (6a, 6b) between printing material (5) and at least one rotatable component (7) when calculating the size. Method according to one of claims 4 to 6,
characterized,
that the mathematical model (15) takes into account the predetermined transfer rates (A) for the printing fluid (6a, 6b) between two of a plurality of rotatable components (7) of several printing units (2) of the printing press (1) when calculating the size. Method according to one of claims 6 or 7,
characterized,
that the mathematical model (15) takes into account a turning (31) of the printing material (5) when calculating the size. Method according to one of the preceding claims,
characterized,
that the specified cleaning processes differ from one another by the use of different detergents (14). Method according to one of the preceding claims,
characterized,
that the specified cleaning processes differ from one another in terms of their duration.

Images