EP1582348A2 - Methods for controlling both a first roll, which takes up a damping agent from a damping agent source, as well as a second roll, and damping systems - Google Patents

Abstract

Process for controlling a first roller (04) which takes up a damping agent from a damping agent reservoir, and a second roller (06) comprises transferring transfer the agent from the rollers to a cylinder (09) of a printing machine. The rollers have separate motors (07, 08) and both the rollers differ from one another in their surface velocities effected by the motors. A change in the surface velocity of cylinder results in a change in the slip between the rollers. An independent claim is also include for a damping system. Preferred Features: The slip between the rollers is adjusted depending on the property of the ink printed by the cylinder. Both rollers are controlled independently of a surface velocity of the cylinder.

Description

The invention relates to methods for controlling a dampening solution of a Dampening solution source receiving first roller and a second roller according to the Preamble of claim 1 or 2.

By the US 3,168,037 A a dampening unit is known in which either a a Dampening from a fountain solution receiving fountain roller or on the Dipping roller rolling transfer roller by a controllable drive such be driven, that a rotational speed of these two rolls though changeable, that the rotational speed of these two rolls but always is the same amount.

From US 3 986 452 A, a dampening unit is known in which a fountain solution a fountain solution receiving dipping roller and at least one with the Dipping roller in rolling contact further roller each one another have independent controllable drive, this further roller with an a form cylinder employed dampening roller is in rolling contact, with a iridescent bridge roller is set to the dampening roller.

EP 0 893 251 A2 discloses a dampening unit with a dampening solution consisting of a dampening solution Fountain solution receiving fountain roller and one on the fountain roller Rolling roll known, both rollers, if necessary, by separate Drive devices can be driven, but both rolls always have the same surface speed.

EP 0 462 490 A1 discloses a film dampening unit for rotary printing presses, in one of the fountain solution box to the forme cylinder of three or four rollers existing roller train a fountain roller and a metering roller by a first Electric motor are driven together, one of the metering roller in the compactor subsequent wet rubbing roller by a mechanism in addition axially and is moved and where on to the dampening roller and the forme cylinder Employed dampening roller a bridge roller is employed.

From DE 29 32 105 C2 is a dampening unit of an offset rotary printing machine known, wherein the dampening unit of the dampening solution up to the forme cylinder comprising a three-roller compactor and each of the three rollers independently from a preferably continuously adjustable, controllable Electric motor is driven.

By DE 38 32 527 C2 is a drive device for the dampening unit a Offset printing machine known, one at the same time to a dampener and provided on an inking roller iridescent bridge roller is provided, wherein the bridge roller is pneumatically driven, its speed being changed by a change the pneumatic pressure is controlled.

By DE 299 00 216 U1 a dampening unit for a printing machine is known, wherein a fountain solution receiving a first roller and one with the first roller in Moisture transfer connection standing second roller are provided, wherein both rollers are rotationally driven and wherein during operation of the dampening unit between the two rollers is a controllable by control slip.

By WO 03/039873 A1 drives of a printing unit are known, wherein the rotary drive and the traversing drive of a roller to its opposite Ends are arranged.

From JP-A-01 232 045 is a dampening unit of an offset rotary printing machine known, wherein the dampening unit of the dampening solution up to the forme cylinder comprising a three-roller compactor and wherein both the Dipping roller (1st roller) and the transfer roller (2nd roller) independently driven by a more controllable engine.

The invention is based on the object, methods for controlling a fountain solution from a fountain solution receiving first roller and a second roller to create.

The object is achieved by the features of claim 1 or 2.

The achievable with the present invention consist in particular that the Dipping roller and an adjacent wet transfer roller completely independent of each other are controllable. The slip formed between them due to a wanted Difference in their surface speed is required for proper dosing The dampening solution to be applied to the rolls is adjusted as needed. The adaptation of the Slippage takes place in particular as a function of a change in the Surface speed of the forme cylinder.

Embodiments of the invention are illustrated in the drawings and are in Described in more detail below.

Fig. 1

ein Feuchtwerk mit vier Walzen im Walzenzug zum Formzylinder;

Fig. 2

ein Feuchtwerk mit drei Walzen im Walzenzug zum Formzylinder.

Show it

Fig. 1

a dampening unit with four rolls in the compactor to form cylinder;

Fig. 2

a dampening unit with three rollers in the compactor to form cylinder.

1 and 2 each show a schematic representation of a dampening unit 01, preferably a film dampening unit 01, with a first roller 04 and a second roller 06, wherein the first roller 04 a fountain solution 02, z. As water 02 or an alcohol-water mixture 02 of a fountain solution source 03, z. B. from a Feuchtmittelreservoir 03, in particular from a fountain solution box 03 or from a with the fountain solution 02 filled tub 03 receives, wherein the first roller 04 the Fountain solution 02 at least partially directly adjacent to the first roller 04 arranged second roller 06 transmits. The first roller 04 is thus preferably as a fountain roller 04 or formed as a ductor roller 04. Alternatively, the Fountain solution source 03 z. B. as a spray bar 03 with at least one of the dampening solution 02 on the first roller 04 spray nozzle 03 to be formed, wherein the Dampening 02 is applied in the form of finely divided droplets on the first roller 04. Other embodiments provide, the dampening unit 01 as a brush dampening unit or form as a Schleuderfeuchtwerk, in which the dampening solution 02 also contactlessly applied to the first roller 04. The second roller 06 can a Dosing roller 06, a wet transfer roller 06 or a friction roller 06 be, respectively preferably with a chromed or ceramic coated surface. The first roller 04 is the first of several rollers in a compactor over which the Dampening 02 from the fountain solution 03 to that form cylinder 09 a is transported in offset printing process printing machine, the Dampening unit 01 is assigned. The in Figs. 1 and 2 differ in particular in the number of their rollers arranged in the compactor.

The printing machine is z. B. formed as a commercial printing press. Your printing unit has at least one forme cylinder 09 and a transfer cylinder (not shown), wherein these two cylinders roll on each other. Under one Commercial press, preferably one operating in offset printing Commercial printing machine, should be understood a printing press with a forme cylinder 09 be, in which on its forme cylinder 09 in the axial direction only a single Printing form is arranged, wherein the printing form in the forme cylinder 09 axial direction preferably has a plurality of print image locations, wherein the print image locations free from a given format, d. H. in particular in the forme cylinder 09 axial Direction within certain limits can have any width.

Dampening 01, which use a fountain solution 02, the z. B. to reduce a Environmental impact or to reduce its cost preferably no or at least only very little alcohol, in particular isopropyl alcohol (IPA), of clearly less than 5% of the volume of the dampening solution 02 total added added substances is required during production of the printing press, d. H. in her printing company, for a good print result a very precise to the respective production speed adapted setting of the forme cylinder 09 to be transported amount Dampening solution 02. To make matters worse, that for the printing press one always higher production speed can be realized. Reaching today's printing presses for their printing cylinder a production speed of quite 70,000 to 80,000 revolutions per hour. When the diameter of each other in Actually connected transfer cylinder and form cylinder 09 are identical, corresponds to the production speed of the printing press the Surface speed v09 of the forme cylinder 09. The dampening unit 01 with the features described below also provides for such a high Production speed the transport of a sufficient and accurately edible Amount of fountain solution 02 safe.

Furthermore, the quantity required on the forme cylinder 09 for a good printing result of the fountain solution 02 from emulsifying the color used and from the Production of the printed product required amount of ink depends. The color and The fountain solution 02 form a mixture, depending on the nature of the color in the color within a certain limits variable volumetric proportion of Dampening solution 02 is miscible. The backfilled into the dampening unit 01 color can Dampening solution 02 z. B. in a proportion of between 15% and 25% record. Of the Proportion increases with increasing surface velocity v09 of Form cylinder 09 too. The proportion of the emulsified by the fountain solution 02 However, z. B. also by an upper limit value set that on a Substrate, z. As a paper web, printed color during the passage of the Substrate by a printing unit downstream drying unit, z. B. a heatset dryer, still needs to dry safely. As a result of the aspired high Production speed of 12 m / s or more is the residence time of the substrate very short in the drying unit.

The more color print spots a printed product has, the more color it gets Form cylinder 09 required. Consequently, in such a case, an attitude must be set for the pressure required equilibrium of paint and fountain solution 02 also a greater amount of fountain solution 02 are provided on the forme cylinder 09, if with the printing press a color intensive printed product is produced. The dampening unit 01 with the features described below fits the form cylinder 09th provided amount of dampening solution 02 for a good printing result, therefore, also in Dependence on the nature of the color and its quantitative requirements for the printed product to be produced.

In order depending on the production speed of the printing press and the to be adjusted balance of color and fountain solution 02 a needs-based Adaptation of the amount of fountain solution 02 provided on the forme cylinder 09 allow the first roller 04 and the second roller 06 have separate, d. H. independently controllable drive means 07; 08 on. from one another independently controllable drive means 07; 08 for the first roller 04 and the second roller 06 have the advantage that one generated by the drive means 07 Surface speed v04 of the first roller 04 and one of the Drive device 08 generated surface speed v06 of the second roller 06th not rigid a change in the amount of dampening solution 02 influencing Parameters follows, but that for adapting the amount to be transported Dampening solution 02 also the ratio of surface velocities v04; v06 can be adjusted to each other variable and needs-based, so the dosage of the significantly influenced by the dampening unit 01 to be transported dampening 02 becomes. Depending on the currently available printing process, the same may apply to the same Value for the surface speed v09 of the forme cylinder 09 different Settings for the surface speed v04 of the first roller 04 and the Surface velocity v06 of the second roller 06 and for their relationship to each other result.

The surface velocity v04 of the first generated by the drive device 07 Roller 04 and the surface speed generated by the drive device 08 v06 of the second roller 06 are i. d. R. different from each other. Preferably, the Surface velocity v04 of the first roller 04 lower than that Surface speed v06 of the second roller 06. The Surface velocities v04; v06 are independent and variable adjustable. In a preferred embodiment, the surface speed is v06 the second roller 06 z. B. between twice to four and a half times, in particular about three times the surface speed v04 of the first roller 04. The Surface speed v04 of the first roller 04 is in height by the Requirement limits that the first roller 04 on its surface the fountain solution 02 must reliably absorb from the fountain solution 03. Experience has shown a surface speed v04 of the first roller 04 of more than 2 m / s sufficient intake of fountain solution 02 no longer ensured, since then the Dampening 02 substantially from the surface of the first roller 04th is thrown away. Therefore, the surface velocity v04 of the first roll becomes 04 is preferably set to lower values than its upper limit speed, z. B. to a value of at most 1.5 m / s. In contrast, lies the Surface velocity v09 of the forme cylinder 09 z. B. between 12 m / s and 15 m / s.

When the surface speed v06 of the second roller 06 is larger than that Surface speed v04 of the first roller 04 is set, which i. d. R. the case is, exists between the first and the second roller 04; 06 a slip because the Surface speed v04 of the first roller 04 behind the Surface velocity v06 of the second roller 06 remains. This one by the Ratio of surface velocities v04; v06 of the two rolls 04; 06 Slip formed by the independent drive means 07; 08 for the first roller 04 and the second roller 06 variably adjustable.

Depending on a change in the surface velocity v09 of a further drive means 18 driven forme cylinder 09, z. B. at startup the surface velocity v09 of the forme cylinder 09 z. From one Setting speed of the printing press on their production speed, is the from the compactor of the dampening unit 01 to be transported amount of fountain solution 02 adapt. The set-up speed of the printing press is z. B. between 1.7 m / s and 3.4 m / s, preferably between 2 m / s and 2.6 m / s, and thus amounts to between 11% and at most 25% of the production speed of the printing press or the Surface speed v09 of the forme cylinder 09. The surface speed v09 of the forme cylinder 09 is started to reach the production speed from the set-up speed so z. B. increased fourfold to ninefold. For this great speed stroke, a fast-reacting, in the too transporting amount of dampening solution 02 customizable dampening unit 01 needed. Likewise, when starting the printing press from its standstill or if the production speed is reduced, the transporting quantity to adjust the dampening solution 02 respectively. Moreover, the current need for dampening solution 02 - as mentioned - of the required for the printed product to be produced Color quantity dependent. This need for adaptation can be achieved with a rigid coupling, z. B. a gear coupling between the first roller 04 and the second roller 06 in many applications, especially in printing presses with a large Speed change, not always be sufficiently responded.

To accomplish the required adjustment, the drive means 07; 08 the rollers 04; 06 of the dampening unit 01 in their speed controllable, preferably infinitely controllable, in particular electronically controllable. The controller can remotely controlled z. B. from one of the printing press associated control center. The drive means 07; 08 for the first roller 04 and the second roller 06 are preferably as electric motors 07; 08, z. B. as AC or DC motors 07; 08 or as frequency controlled three-phase motors 07; 08 trained. Also, the drive device 18th the forme cylinder 09 can be used as an electric motor 18, e.g. As an AC or DC motor 18 or be designed as a frequency-controlled three-phase motor 18 and also as the drive means 07; 08 of the rollers 04; 06 of the dampening unit 01 controllable be. The drive device 18 of the forme cylinder 09 is in particular of the Drive devices 07; 08 of the rollers 04; 06 of the dampening unit 01 independently, d. H. it in particular there is no positive connection between the drive means 07; 08 of the Rollers 04; 06 and the drive means 18 of the forme cylinder 09. It is not required that the drive means 18 of the forme cylinder 09 exclusively only the Form cylinder 09 drives, but transmits the drive means 18 that produced by it Torque at least on the forme cylinder 09, but possibly also on the the form cylinder 09 cooperating transfer cylinder (not shown).

The control of the drive means 07; 08; 18 can be added as needed by adding an actual value detecting feedback and a feedback signal evaluating evaluation be extended to a scheme, wherein preferably the actual value of a rotational speed of the rollers 04; 06 or the forme cylinder 09 z. B. is detected with a sensor providing an electrical output signal. The Control of the drive means 07; 08; 18 is preferably done by means of a computing unit (not shown), the z. B. a corridor for cheap Specifies setting values.

The first roller 04 and the second roller 06 of the dampening unit 01 form the first Rolls in the compactor, which transports the dampening solution 02 to the forme cylinder 09, wherein the surface speed v04 of the first roller 04 and the Surface velocity v06 of the second roller 06 independently and without rigid dependence on the surface speed v09 of the forme cylinder 09 are adjustable. The surface speed v04 of the first roller 04 or the Surface speed v06 of the second roller 06 are i. d. R. less than that Surface speed v09 of the forme cylinder 09.

It can be provided that in a first operating state of the dampening unit 01 the Surface velocity v09 of the forme cylinder 09 and the Surface velocity v06 of the second roller 06 in a first ratio to each other whereas the surface velocities v06; v09 in one second operating state of the dampening unit 01 in a second relationship to each other stand. During both operating states of the dampening unit 01, the Surface velocity v09 of the forme cylinder 09 have the same value or assume mutually different values.

The compactor to the forme cylinder 09 may be about a third roller 11 or to a Fourth roller 13 are extended, wherein the third roller 11 of the second roller 06 and the fourth roller 13 of the third roller 11 is arranged downstream. The third roller 11 is z. B. by a transmission 12, z. B. a gear transmission 12 or a belt drive 12, with the second Roller 06 coupled. Alternatively, the drive of the third roller 11 by friction z. B. on the second roller 06 or by friction on the forme cylinder 09. The Surface speed of intended in the compactor for form cylinder 09 Rollers are each set such that between the second roller 06 and the third Roller 11 or between the third roller 11 and the fourth roller 13 slip. Between the first roller 04 and the second roller 06, the slip z. B. 1: 3 be, with the first roller 04 rotates slower than the second roller 06. The slip between the second roller 06 and the third roller 11 can be selected significantly larger be, wherein the third roller 11 rotates much faster than the second roller 06th

For a better distribution of dampening solution 02 on the surface of the compactor arranged rollers 06; 11; 13 and to prevent stenciling at least one of these rollers 06; 11; 13, the first roller 04 in the compactor follow, be made iridescent. It is advantageous to use the designated Traversing drive 19 from the rotary drive 07; 08 of the rollers 06; 11; 13 to decouple and independently controllable design. In particular, the frequency is the traversing movement freely selectable. The stroke of the traversing movement is z. B. ± 8 mm. However, it can also be a variably adjustable stroke of the traversing z. B. be provided between 0 mm and 16 mm. The traversing drive 19 is z. B. as a electric motor 19, z. B. as a linear motor 19, is formed. The dampening solution 02 on the form cylinder 09 applying roller 11; 13 is particularly about friction of Form cylinder 09 driven.

The forme cylinder 09 is an inking unit 16 with at least one of the forme cylinder 09th assigned to the inking roller 17, wherein the inking unit 16 a on the Surface of the forme cylinder 09 mounted printing form (not shown) by means of Inking roller 17 colors. The fountain solution 02 on the forme cylinder 09 priority applying roller 06; 11; 13, d. H. depending on the design of the roller the second roller 06, the third roller 11 or the fourth roller 13, is then preferably at the same time the forme cylinder 09 and the inking roller 17 or to an inking roller of the with the forme cylinder 09 cooperating inking 16 adjustable. The employment the fountain solution 02 on the plate cylinder 09 applying roller 06; 11; 13 to the Ink roller 17 can thus directly or indirectly via a z. B. as well Ink roller 14 trained bridge roller 14 done. Especially in one Dampening unit 01 with four rollers 04; 06; 11; 13 in the compactor can still another, the first bridge roller 14 upstream second bridge roller 23 may be provided (in Fig. 1st dashed lines), wherein the upstream bridge roller 23 between the first Bridge roller 14 and the third roller 11, d. H. in the compactor in front of the Dampening 02 arranged on the forme cylinder 09 fourth roller applied Roller 11, is arranged. The first bridge roller 14 is preferably in one Frame (not shown) stored and by at least one adjusting means, for. B. one remotely operable working cylinder, in particular a pneumatic cylinder (not shown) movable, that they optionally, z. B. controlled by the control room, one of the four below occupy described operating positions. In an operating position she is on the inking roller 17 and not at the fountain solution 02 on the forme cylinder 09th applying roller 06; 11; 13 employed. In another operating position is the Bridge roller 14 at the fountain solution 02 applying to the forme cylinder 09 Roller 06; 11; 13 and not employed on the inking roller 17. In another Operating position is the bridge roller 14 at the same time on the fountain solution 02 on the Form cylinder 09-applying roller 06; 11; 13 and on the inking roller 17th employed, wherein its normal operating position, wherein the bridge roller 14 at Need can be moved in addition to the other remaining operating positions. Of Furthermore, the bridge roller 14 at the same time from the fountain solution 02 on the Form cylinder 09-applying roller 06; 11; 13 and of the inking roller 17th be turned off. The bridge roller 14 is then turned on when with a the Fountain solution 02 on the form cylinder 09-applying roller 06; 11; 13 and / or with the Ink roller 17 in touching contact or at least for the transport of the color or the fountain solution 02 is in operative connection, whereas it is turned off when its surface the surface of one of said rollers 06; 11; 13; 17 not touched or the surfaces of said rollers 06; 11; 13; 17 for the transport of the paint or the fountain solution 02 at least not in operative connection. Also the upstream bridge roller 23 may have a plurality of operating positions by at the first bridge roller 14 or on the third roller 11 either employed or from at least one of these rollers 11; 14 is turned off, wherein at least one actuating means (not shown), z. B. a working cylinder, in particular a pneumatic cylinder, is provided, wherein the adjusting means the upstream bridge roller 23 of the one to moved another operating position, wherein the actuation of this actuating means preferably also remotely controlled, in particular from the control room, can take place.

When touching contact forms between the rollers 04; 06; 11; 13 on their Surface preferably in the axial direction of a flattened strip with a Width between 3 mm and 8 mm, preferably between 5 mm and 6 mm, from. Between the dampening solution 02 on the forme cylinder 09 applying roller 06; 11; 13 and the inking roller 17 and the forme cylinder 09 can the flattened strips have a width of 8 mm to 10 mm. Of the Touch contact between the rollers 04; 06; 11; 13; 17 or the forme cylinder 09 is z. B. manually with an adjusting spindle, preferably by a path change adjusted, with the set width of the strip during the printing process remains unchanged. If the width of the strip during the printing process should be changeable, it is advantageous to adjust the rollers 04; 06; 11; 13; 17 with execute a roller lock, the z. B. remotely controlled, preferably by a Actuation from the control center, performs a radial stroke. The setting of the width of the Strip is i. d. Irrespective of the surface velocity v09 of the Form cylinder 09.

The bridge roller 14 is preferably formed iridescent and z. From one preferably as a controllable motor 21, z. B. as a linear motor 21, trained Traversing drive 21 is preferably driven independently of its rotational movement, wherein for their rotational movement another, of the remaining drive means 07; 08; 18 independent drive device 22, z. Example, a motor 22, preferably an AC or DC motor 22 or a frequency-controlled three-phase motor 22, in particular a electrical, remotely controllable motor 22 may be provided.

When the fountain solution 02 applying to the forme cylinder 09 roller 11; 13 over Friction is driven, this roller 11; 13 be mounted in the frame such that her an axial stroke of z. B. 3 mm to 4 mm is possible, this hub thereby is executed, that they are taken by the traversing movement of the bridge roller 14 becomes. Between the fountain solution 02 on the forme cylinder 09 applying roller 11; 13 and the forme cylinder 09 is preferably no or only a minimal Slip of less than 2%, preferably less than 1%. In particular But applications can also be used as an alternative to the friction drive for the Rotational movement of the fountain solution 02 on the forme cylinder 09 applying roller 11; 13 a separate, from the remaining drive means 07; 08; 18; 22 independent Drive device (not shown), z. As a motor, preferably an AC or DC motor or a frequency-controlled three-phase motor may be provided.

For the conversion of the dampening unit 01 between the "operating mode direct humidity" and the Operating mode "indirect humidification" can be provided that the fountain solution 02 on the form cylinder 09 applying roller 11; 13 to the bridge roller 14 adjustable or is off of her. In Fig. 2 is the dampening 02 to the forme cylinder 09 applying roller 11; 13, here the roller 13, shown in two operating positions. In the dash-dotted representation, the roller 13 is parked by the bridge roller 14. Around the fountain solution 02 on the forme cylinder 09 applying roller 11; 13 in her to move desired operating position is at least one preferred remotely controllable, z. B. controllable by the control center adjusting means (not shown), z. B. a Working cylinder, preferably a pneumatic cylinder, provided that the Fountain solution 02 on the forme cylinder 09 roller 11; 13 regarding the Bridge roller 14 brings in one of the two operating positions or from the forme cylinder 09th turns off. The fountain solution 02 applying to the forme cylinder 09 roller 11; 13 can z. B. be stored in an eccentric bush in which the fountain solution 02 on the Form cylinder 09 applying roller 11; 13 with the actuating means in his desired Operating position is moved. The "direct humidification" mode is selected when the the fountain solution 02 on the forme cylinder 09 roller 11; 13 on the form cylinder 09 employed and parked by the bridge roller 14. In this operating mode, the the fountain solution 02 on the forme cylinder 09 roller 11; 13 only that Dampening solution 02 on the forme cylinder 09 on. The operating mode "indirect humidification" is chosen when the fountain solution 02 on the forme cylinder 09 applying roller 11; 13 is employed simultaneously on the forme cylinder 09 and on the bridge roller 14. At the "indirect moisture" transports the dampening solution 02 on the forme cylinder 09th applying roller 11; 13 also in not insignificant extent from the inking 16 coming color to form cylinder 09.

It can be provided that the first roller 04 and the second roller 06 together from the dampening agent 02 on the forme cylinder 09 applying roller 11; 13 are movable. For this purpose, the first roller 04 and the second roller 06 in a be supported common support, the support z. B. has a fulcrum, around which the support is rotatable, whereby the first roller 04 and the second roller 06 of the dampening solution 02 on the forme cylinder 09 applying roller 11; 13 together Swing out.

The surface of the first roller 04 is z. B. of an elastomeric material, preferably made of a rubber, in particular of a material having a hardness between 20 and 30 Shore A, preferably about 25 Shore A. The surface of the second Roller 06 is z. B. of a ceramic or a chromium-containing material, where z. B. on a roll core of a metallic material, a coating is applied from a chromium-containing material. The surface of the dampening solution 02 on the plate cylinder 09 applying roller 11; 13 is again z. B. from a Elastomer material, preferably made of a rubber, in particular of a material with a hardness between 25 and 40 Shore A, preferably about 35 Shore A. The Surface of the fountain solution 02 on the forme cylinder 09 applying roller 11; 13 is thus preferably harder than the surface of the first roller 04. Die Surface of the second roller 06 is preferably much harder, z. B. by the factor ten harder than the surface of the first roller 04 or the surface of the Fountain solution 02 on the forme cylinder 09-applying roller 11; 13 trained. The Surface of the bridge roller 14 is z. B. from a plastic, preferably from Rilsan. The surface of the upstream bridge roller 23 may, however, from a Elastomer material, preferably made of a rubber.

The surface speeds of forme cylinder 09 to the fountain solution 02 on the form cylinder 09-applying roller 13 to the third roller 11 to the second roller 06th to the first roller 04, for example, behave as 1 to (1 to 0.98) to (0.4 to 0.98) to (0.25 to 0.4) to (0.08 to 0.18), preferably 1 to 0.99 to 0.96 to 0.33 to 0.1. at Use of only three rollers in the compactor between the forme cylinder 09 and the Feuchtmittelreservoir 03 eliminates the above-mentioned separately for the third roller 11 above Slip ratio, because the third roller 11 already the fountain solution 02 on the Form cylinder 09 is applying roller.

LIST OF REFERENCE NUMBERS

01

Dampening unit, film dampening unit

02

Dampening solution, water, alcohol-water mixture

03

Dampening solution source, fountain solution reservoir, fountain solution box, bath, Spray bar, spray nozzle

04

Roller, first; Dipping roller, ductor roller

05

-

06

Roller, second; Dosing roller, wet transfer roller, rubbing roller

07

Drive device, motor, AC or DC motor, three-phase motor

08

Drive device, motor, AC or DC motor, three-phase motor

09

form cylinder

10

-

11

Roller, third

12

Transmission, gear transmission, belt drive

13

Roller, fourth

14

Bridge roller; Ink distributor roller

15

-

16

inking

17

Inking roller

18

Drive means; Motor, three-phase motor

19

Traversing drive; Engine; linear motor

20

-

21

Traversing drive; Engine; linear motor

22

Drive means; Motor, AC or DC motor, three-phase motor

23

upstream bridge roller

v04

Surface speed (04)

v06

Surface speed (06)

v09

Surface speed (09)

Claims (19)

Method for controlling a first roller (04) receiving a dampening solution (02) from a dampening solution source (03) and a second roller (06), in which the rollers (04, 06) form a dampening means (02) into a forme cylinder (09 ) of a dampening unit (01) transporting a printing press, in which the first roller (04) transfers the dampening solution (02) to the second roller (06), in which the first roller (04) is driven by a motor (07) and the second roller (06) driven by another motor (08) and both rollers (04, 06) independently of each other on a by the respective motor (07; 08) generated surface speed (v04, v06) are set, characterized in that the surface speed ( v04, v06) of the first and / or the second roll (04; 06) and / or a slip between the first and the second roll (04; 06) is respectively set in dependence on a property of a color printed by the forme cylinder (09) , where the color and the dampening solution (02) form a mixture, wherein the property of the color in the proportion of the dampening solution (02) mixed in it. Method for controlling a first roller (04) receiving a dampening solution (02) from a dampening solution source (03) and a second roller (06), in which the rollers (04, 06) form a dampening means (02) into a forme cylinder (09 ) of a dampening unit (01) transporting a printing press, in which the first roller (04) transfers the fountain solution (02) to the second roller (06), wherein the first roller (04) is driven by a motor (07) and the second roller (06) driven by another motor (08) and both rollers (04, 06) independently of each other on a by the respective motor (07; 08) generated surface speed (v04, v06) are set, characterized in that the surface speed ( v04, v06) of the first and / or the second roller (04; 06) and / or a slip between the first and the second roller (04, 06) in each case depending on a quantity required for producing a printed product from the forme cylinder (09 ) verdruc kten color is adjusted. Method according to claim 1 or 2, characterized in that the surface speed (v04; v06) of the first and / or the second roller (04; 06) is set as a function of the surface speed (v09) of the forme cylinder (09). Method according to claim 1 or 2, characterized in that the two rollers (04; 06) are controlled independently of a surface speed (v09) of the forme cylinder (09). A method according to claim 1 or 2, characterized in that the second roller (06) is operated iridescence. A method according to claim 1 or 2, characterized in that the motors (07; 08) are steplessly controlled. A method according to claim 1 or 2, characterized in that the motors (07; 08) are electronically controlled. Method according to claim 1 or 2, characterized in that the motors (07; 08) are controlled by a control station. A method according to claim 1 or 2, characterized in that the surface speed (v04) of the first roller (04) is set lower than the surface speed (v06) of the second roller (06). A method according to claim 1 or 2, characterized in that the surface speed (v04) of the first roller (04) or the surface speed (v06) of the second roller (06) is set lower than the surface speed (v09) of the forme cylinder (09). A method according to claim 1 or 2, characterized in that the surface speed (v04) of the first roller (04) is set to a value of less than 2 m / s. A method according to claim 1 or 2, characterized in that in the roller train to the forme cylinder (09) one of the second roller (06) downstream third roller (11) is provided which is coupled by a gear (12) with the second roller (06) , A method according to claim 1 or 2, characterized in that in the roller train to the forme cylinder (09) one of the second roller (06) downstream third roller (11) is provided, which is driven by friction on the second roller (06). A method according to claim 12 or 13, characterized in that in the roller train to the forme cylinder (09) of the third roller (11) downstream fourth roller (13) is provided. A method according to claim 12, 13 or 14, characterized in that a slip is set between the second roller (06) and the third roller (11) or between the third roller (11) and the fourth roller (13). Method according to claim 1, 2, 12 or 13, characterized in that the roller (06; 11; 13) which applies the dampening solution (02) to the forme cylinder (09) simultaneously with the forme cylinder (09) and indirectly via a bridge roller (14 ) or directly with an inking roller (17) of an with the forme cylinder (09) cooperating inking unit (16) is brought into contact. A method according to claim 1 or 2, characterized in that the first roller (04) for receiving the dampening solution (02) is immersed in a fountain solution reservoir (03). A method according to claim 1 or 2, characterized in that the dampening solution (02) in the form of finely divided droplets on the first roller (04) is applied. Method according to claim 1 or 2, characterized in that the surface speed (v04; v06) of the first and / or the second roller (04; 06) and / or the slip between the first and the second roller (04; Arithmetic unit is changed.

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