WO2011003758A1

WO2011003758A1 - Method and device for generating a structured layer

Info

Publication number: WO2011003758A1
Application number: PCT/EP2010/059110
Authority: WO
Inventors: Uwe Püschel; Guido Reschke; Jürgen Schölzig; Wolfgang Treiss
Original assignee: Manroland Ag
Priority date: 2009-07-07
Filing date: 2010-06-28
Publication date: 2011-01-13
Also published as: DE102010029423A1; EP2576220A1; CN102470666A; CN102470666B; JP2012532769A

Abstract

The invention relates to a method and a device for generating a structured layer on a sheet material in a processing machine. The aim of the invention is to improve a method and a device such that the machine can be used in a more flexible manner. The aim is achieved in that, in an application unit (B) formed by the film transfer unit, a paint layer is arranged on a substrate on the surface-deforming device having a pressing gap (10), in which a structured layer is pressed on the substrate coated with the paint layer. The pressing operation is carried out only at the counter pressure cylinder (2) and the further cylinder (1, 30). Following the pressing gap (10), the structured layer and the substrate coated with the paint layer can be transported during a dry radiation operation synchronously with the counter pressure cylinder (2). The structured surface is then separated from the substrate in a discharge gap (11) and transported away.

Description

The invention relates to a method and an apparatus for producing a structured layer on a sheet matehal in a processing machine according to the preambles of the independent claims.

For the refinement of printed, varnished sheet (sheet material) by means of a cold foil transfer process, several methods and devices are known.

A method and a device of this type is known from EP 0 569 520 B1, wherein a cold foil material and a printing device using this material are described. In this case, a sheet material processing machine is shown which has a feeder and a boom, between which two units printing units and a coating unit are arranged. In at least one of the printing units, an adhesive pattern is applied by means of the planographic printing process. This adhesive pattern is applied in a cold printing process and has a specific imaging subject. In a printing unit following the coating unit with an impression cylinder and a transfer cylinder a film guide is provided. This is designed in such a way that a cold foil material is guided by a roller acting as a press nip printing nip of the coating unit between the impression cylinder and the transfer cylinder and the remaining cold foil material is wound up on the outlet side after leaving the coating unit again.

WO 2008/084191 A1 discloses a transparent coating process with the following steps: application of a curable lacquer layer to a substrate (printing material), pressing of a surface treated film surface against the still moist lacquer layer, hardening of the lacquer layer while the film is pressed against this and separating of the film from the paint layer after the paint simply hardened. For this purpose, a machine configuration is disclosed, which comprises an upstream printing unit or a coating unit for the transfer of a curable lacquer layer to the substrate and a downstream of this printing unit or a coating unit for pressing the film surface against the still wet lacquer layer. Furthermore, the machine configuration comprises a curing unit for curing the lacquer layer while the film is pressed against this or the substrate and a substrate transport system for the coated substrate and the film, which separates the film from the lacquer layer after the lacquer has cured. The pressed against the coating layer film adheres by the tack or adhesion of the paint on the paint layer and in addition, a guide roller is arranged downstream, which realizes the Anpresskontakt the film with the paint layer on the substrate. The separation of the (unnecessary) film from the substrate takes place after passing through the guide roller.

DE 10 2006 021 069 A1 discloses a printing press with a painting unit arranged downstream of a printing unit and with a holographic finishing unit arranged downstream of the painting unit. The holographic finishing unit comprises a film former having a hologram surface, which can be brought into operative connection by means of a feed device in synchronism with a sheet guiding cylinder. The holographic finishing unit further comprises a pair of rollers which, in the production operation, press the hologram surface of the film base onto the sheet material resting on the sheet guiding cylinder. Both rollers are further movable to an interruption condition with the film blank being out of contact with the sheet material. Between both rollers, an ultraviolet (UV) - exposure device is arranged, which emits UV rays to the sheet material.

DE 10 2007 034 302 A1 further forms the embodiment according to DE 10 2006 021 069 A1 in that a transfer film is pressed onto the sheet material. In this case, the gripper which holds the sheet material on the sheet-guiding cylinder can be pressed into the interior of the sheet-guiding cylinder during the pressing-on of the transfer film. be lowered.

The embodiments according to DE 10 2007 034 302 A1 and DE 10 2006 021 069 A1 continue to form in that the UV exposure device can be moved in the direction of the sheet guiding cylinder or away from it. In this case, the UV exposure device is movable away from the sheet guiding cylinder with the film molding or away.

The object of the invention is to be able to carry out a method and a device of the type mentioned above more flexibly.

The object is solved by the training features of claim 1 and 2. Further developments emerge from the dependent claims. For finishing sheet material, the sheet matehal is first coated with a lacquer layer on the respective side, which is to have a structure. Subsequently, in a press nip of an application work, formed by a sheet guiding cylinder, especially a counter-pressure cylinder, and a cylinder, for example a forme cylinder or blanket cylinder, a structural layer or a structural film with a structural layer and the sheet material with already applied lacquer layer is supplied. In this case, only in the press nip a surface-related force is applied to the structure layer or the structure film with a structure layer, so that their surface structure is transferred into the paint layer. After passing through the press nip, the sheet material with the lacquer layer and the structural layer or the structural film with a structural layer in a wrap X X congruent, ie superimposed, transported on the sheet material leading sheet guiding cylinder in the conveying direction. While the sheet material with lacquer layer and the structural layer or structural film with structural layer arranged thereon passes the wrap angle X in the conveying direction, no additional force is applied to the sheet material guided on the impression cylinder, since the required connection is already effected in the upstream press by means of a surface-related force. gap was generated. Subsequent to the already mentioned press nip, in which the surface structure of the structural layer or structural film (with structural layer) was transferred to the lacquer layer on the sheet matehal, the sheet matehal with lacquer layer and the structural layer is thus placed only on the counterpressure cylinder Front edge fixed to grippers transported or guided in the conveying direction. The pressed in the press nip to the sheet material (with resist layer) structural film or the structural layer is thus transported synchronously (congruent) with the sheet material in the conveying direction on the impression cylinder.

In addition, in the conveying direction after passing through the press nip, the sheet material with lacquer layer and structured foil or the structural layer in the wrap angle X of a sheet guiding cylinder is exposed to radiation or drying. Preferably, the action of the radiation or drying takes place immediately after leaving the press nip. At least the paint layer in the form embossed by the structural film or the structural layer is exposed to the radiation or drying on the sheet material. In this case, a curing / drying process is excited in the paint layer and carried out as far as possible.

In the conveying direction, the wrap angle X is followed by an outlet gap in which the textured layer with structured layer can be separated from the sheet material with structured lacquer layer guided on the sheet guiding cylinder and the sheet material with the structured lacquer layer can be further transported on the impression cylinder. With the separation of the structural layer with a structured surface or the structural film with a structural layer from the structured lacquer layer located on the sheet material, the molding process, ie the replication of the surface structure of the respective structural layer, in the structured lacquer layer is completed. By means of action of the radiation or drying of a radiation / drying source, the structured lacquer layer is substantially dimensionally stable solidified. Preferably deflection means are arranged fixed to the frame for the removal of the used structural layer or structural film. These deflecting means are merely used to guide the web of the structure layer or structural film to be removed and are in contact with the impression cylinder leading the sheet matehal and the sheet material having a structured coating layer.

In addition, if required, such an application plant can have a further processing unit, e.g. for embossing, cutting or punching, be downstream. The invention will be explained in more detail below using an exemplary embodiment. Here are shown schematically:

1 an application plant in the first embodiment,

2 shows a further arrangement of an application plant,

Fig. 3 shows a further arrangement of an application plant and

Fig. 4 a structural roll for an application plant.

A processing machine, preferably for the finishing of sheet material 6, comprises in the conveying direction 3 of the sheet material 6 a feeder as well as a plant and several printing units C. If required, the processing machine can additionally comprise at least one coating unit A.

Such a printing unit C comprises a counter-pressure cylinder 2 designed as a sheet-guiding cylinder, a cylinder 1 - here as a blanket cylinder, a plate / forme cylinder 19, an inking unit 20 and, if required, a dampening unit 21. The respective counter-pressure cylinder 2 can move beyond the printing gap formed from blanket cylinder 1 and impression cylinder 2, a second radiation / drying source 9 to be assigned. The further printing units C are of substantially identical construction and may also have such radiation / drying sources 9.

A coating unit A comprises at least one sheet material guiding the sheet material 6. gendruckzylinder 2, one with the impression cylinder 2 operatively connected cylinder 1, designed here as a forme cylinder or blanket cylinder. The cylinder 1 of each coating unit A is in operative connection with a metering device 17. The respective counter-pressure cylinder 2 can be assigned a second radiation / drying source 9 after the paint gap, formed from cylinder 1 and impression cylinder 2. The second radiation / drying sources 9 arranged in the printing units C and coating units A can be designed as ultraviolet (UV) dryers. Between printing units C and between a printing unit C and a coating unit A transfer cylinder 18 are arranged. The Gegenruck- 2 and the transfer cylinder 18 are sheet guiding cylinder with sheet holding means, preferably with grippers for fixing a sheet edge.

The grippers of the sheet guiding cylinders, especially the counter-pressure cylinders 2 and the transfer cylinders 18, can be conventional grippers projecting beyond the lateral surface (s) of the counter-pressure cylinder 2 or transfer cylinder 18. Alternatively, the grippers can be arranged within the lateral surface (s) of the sheet guiding cylinder 2 or 18, including an elevator on the lateral surface. Alternatively, the grippers may be temporarily movable at least when a printing, coating or press nip 10 passes into the interior of the sheet guiding cylinder 2, 18, in particular the counterpressure cylinder 2.

All plate / form cylinder 19 may be integrated in a first training in the gear train of the main drive of the printing press. In a second embodiment, all plate / forme cylinder 19 are mechanically separated (at least in the printing operation of the main drive (with gear train) and coupled in each case with a single drive for the printing operation or for setting.

The processing machine comprises an application plant B, for example in the basic structure of a conventional coating unit, which comprises a forme cylinder, here as a cylinder 1, and if necessary a metering device 17, and a sheet guiding cylinder as an impression cylinder 2. Preferably, the impression cylinder 2 is preceded by a transfer cylinder 18. For the lacquer layer structuring or alternatively the function of a cold foil transfer is the metering device 17 at least separated from the associated form cylinder (cylinder 1), preferably turned off.

After completion of the paint application or paint layer structuring or the cold foil transfer and removal of a Strukturfolien- or structural layer material 7 from the press nip 10, formed from cylinder 1 and impression cylinder 2, the metering device 17 can again brought into functional contact with the forme cylinder 1 and the application unit B again as conventional Coating can be used.

Alternatively, the application work B in the basic structure may also be a printing unit which comprises a blanket cylinder, here designed as a cylinder 1, and a plate / forme cylinder 19 and at least one inking unit 20. For the function of the Lackschichtstrukturierung or the cold foil transfer of the plate / forme cylinder 19 is at least separated from the associated blanket cylinder 1. After completion of the application and removal of the structural film or structural layer material 7 from the press nip 10, formed from blanket cylinder 1 and plate / forme cylinder 19, the plate / forme cylinder 19 can be brought into operation with inking unit 20 with the blanket cylinder 1 and the application unit B again be used as a printing unit.

In Fig. 1 is u. a. as a commissioning unit a printing unit C shown, which is formed from a cylinder 1, here as a blanket cylinder 1, a plate / forme cylinder 19, an inking unit 20 and, if necessary, a dampening unit 21 is formed. The blanket cylinder 1 is associated with a Bogenmatehal 6 leading impression cylinder 2. If necessary, in the conveying direction 3 after the contact point of

Blanket cylinder 1 and impression cylinder 2, a second radiation / drying source 9, for example, a UV dryer, be arranged. By means of the applicator unit designed as printing unit C, starting from the inking unit 20, coatings of the lacquer can be applied to the sheet material 6 guided on the impression cylinder 2 via a printing plate fixed to the plate / forme cylinder 19 and the blanket cylinder 1. Alternatively, a separation can take place between the plate / forme cylinder 19 and the blanket cylinder 1. The paint is then transferred from one to the blanket cylinder 1 on / off adjustable (additional) metering device 17 on a plate fixed to the blanket cylinder 1 and applied to the substrate. In Fig. 2, the application plant B is shown, in the conveying direction 3, a printing unit C is arranged with the same function for the paint coating. Alternatively, instead of the printing unit C, the coating unit B may be preceded by a coating unit A having the same function for the lacquer coating.

This application unit B comprises an immediately downstream, preferably integrated sheet delivery device D. This sheet delivery device D comprises an endlessly circulating conveying device 22, which has means for holding the respective sheet material neck 6 in order to convey the sheet material neck 6 in the direction of a delivery stack 23 and deposit on it , The conveyor 22 is arranged downstream of the counter-pressure cylinder 2 of the application unit B in the conveying direction 3. If required, the sheet delivery D can have a further, second radiation / drying source 9.

The application work B comprises the impression cylinder 10 forming the impression cylinder 2 and cylinder 1, which comprise means for generating a force acting on the Bogenmatehal 6 with lacquer layer and on the structural layer or structural film 7 (with structural layer), surface-related force. The structural layer of the structural film 7 may have a regular, irregular or stochastic structure. If necessary, the structural layer (structural film 7) can be produced by means of a device directly in the processing machine. For example, the application plant B can have a laser device that generates the structure layer for this purpose.

As a sheet material 6, for example, paper, cardboard, corrugated board or foil can be used, wherein the sheet material 6 (pre) can be finished or laminated. The cylinder 1 may comprise a cylinder channel which is in operative connection with sheet holding means arranged on the adjacent counterpressure cylinder 2 (sheet guiding cylinder 2). The means for generating a surface force may be gear mechanisms and / or bearings, which also have a positive Onsveränderung of the cylinder 1, for example, to adapt to the thickness of Bogenmatehals 6 and / or to the thickness of the structural layer or structural film 7 and to adjust the pressing force in the press nip 10 allow. Subsequent to the press nip 10, the structural layer or structural film 7 (with structural layer) and the sheet matehal 6 coated with the lacquer layer can be transported synchronously in a wrap angle X on the impression cylinder 2 in the conveying direction 3. In the region of the wrap angle X, a first radiation / drying source 8 is arranged adjacent to the impression material 2 with lacquer layer and structure layer or structure foil 7 (with structure layer) leading impression cylinder 2 at a distance to harden the lacquer layer. In the conveying direction 3, an outlet gap 11 is arranged after the wrap angle X. In this outlet gap 11, the structural layer or structural film 7 (with structural layer) with a structured surface of the sheet material 6 with the structured lacquer layer is separable and the sheet material 6 is further transported with the structured lacquer layer on the impression cylinder 2.

Individual or all radiation / drying sources 8; 9, in particular taking into account the nature of the paint as preferred UV dryer, IR dryer or other dryer can be performed.

In a further embodiment, at least the first radiation / drying source 8 can be formed as a UV radiation / drying source 8 based on LEDs (Light Emitting Diode) in the application unit B. Such an LED radiation / drying source 8 extends at least over the format width and, if appropriate, peripherally in the conveying direction 3. Preferably, the UV radiation / drying source 8 can extend over the format width and / or in the circumferential direction, ie. H. in the conveying direction 3, the Bogenmatehals 6 individually activatable UV LED, for example, UV LED emitters 34, have, whose emitted radiation is directed to the sheet material 6. If desired, the UV-LED radiation emitted by the UV-LED can be directed to the areas of the sheet matehal 6 that each carry a lacquer layer (UV-curing lacquer layer).

The use of a UV radiation / drying LED-based is not on the first radiation / drying source 8 limited. Rather, at least one second radiation / drying source 9 in the sheet delivery D for post-curing may be formed as a UV radiation / drying source 9 based on LEDs. By means of the UV LED emitter 34, the heat input into the sheet material 6 can advantageously remain relatively low and, if necessary, only certain UV LEDs can be activated for spot radiation.

In the conveying direction 3, a guide roller 15 for discharging the used structural layer or structural film 7 (with structure layer) is arranged after the outlet gap 11, wherein it is out of contact with the sheet material 6 on the impression cylinder 2 and thereby forms the outlet gap 11 with the impression cylinder 2.

By means of a printing unit C, coating unit A upstream of the application unit B, or a coating unit integrated in a printing unit C, a UV-drying lacquer layer is applied to the sheet material 6. The lacquered (full-area or partial) sheet material 6 is brought into contact in the following press nip (press nip 10) of the application unit B with a structural layer or a structural film 7 carrying a structural layer, which on the contact side to the sheet material 6 (with paint) a surface structure, preferably a fine relief, has.

Such special films (structured film / structural layer 7) are known and find

Use in different applications.

A shaped surface structure or a relief transferred in this way to paint layers can then lead to certain holographic and haptic effects under the action of suitable refraction of light.

In order to transfer the desired surface structure or the desired relief in detail to the lacquer layer, the lacquer must, during the contact between the adhering lacquer layer resting on the sheet material 6 and the structural layer or structured foil 7 (with structural layer), by means of radiation, preferably from UV radiation, to be dried. The drying of the lacquer layer takes place through the structural layer or structural foil 7 (with structural layer). by. Only then are sheet material 6 and structural layer or structural film 7 (with structural layer) separated.

In order to ensure the transfer of the surface structure or the relief to the lacquer layer, the structural layer or structural film 7 (with structural layer) after the pressure nip (press nip 10) still has a defined distance, ie. H. a wrapping angle X, are guided over the impression cylinder 2 and thereby irradiated with UV radiation or UV light. In the conveying direction 3 follows the wrapping angle X of the outlet gap 11 in which the structure layer with a structured surface or the structure film with structure layer 7 of the guided on the sheet guiding cylinder 2 sheet material 6 with structured lacquer layer is separable and the sheet material 6 with the structured lacquer layer on the impression cylinder. 2 can be transported further. With the separation of the structured layer with a structured surface or the structured foil with a structural layer 7 from the structured lacquer layer located on the sheet material 6, the molding process, i. H. the replica of the surface structure of the respective structural layer 7, finished in the structured lacquer layer. By means of the action of the radiation or drying of the radiation / drying source 8, the structured lacquer layer is solidified substantially dimensionally stable, i. sufficiently hardened. The structural film with structural layer 7 can from a Vorratsas

This coating process can be carried out at the application plant B as follows:

In Fig. 1 an arrangement according to the invention is shown. In the printing unit C, a lacquer layer (full-surface or partial) is applied directly or by means of a metering unit 17, which is arranged there and optionally can be deposited, onto the sheet material 6 guided on the sheet guiding cylinder 2. The lacquered sheet material 6 is transported with still deformable lacquer layer by means of sheet guiding cylinder 2 and 18 to the downstream sheet guiding cylinder 2 of the application B and the press nip 10. Here is a structural layer or structural film 7 (with a structural layer) from a film supply roll 13 through the press nip 10 between the blanket cylinder 1 and the impression cylinder 2 and then via a Umform- Guide roller 15 is guided to a film collecting roller 14. The film supply rolls 13 and film collecting rolls 14 may be mounted on a rotatable roll star or alternatively in a film store in front of or next to the processing machine.

Alternatively, the structure film 7 with structure layer 7 can also be designed to be endlessly circulating over rollers.

Furthermore, the structure film with structure layer 7 can be transported forward or backward.

If necessary, the application unit B may comprise a cleaning device for the purpose of cleaning the structured film with structured layer 7. The transported structured film with structural layer 7 is temporarily brought into contact with the cleaning device.

The structural layer or structural film 7 (with structural layer) as well as the varnish-coated sheet material 6 are fed together to the press nip 10. In this case, exclusively in the press nip 10, a surface-related force is generated on the sheet material 6 with lacquer layer and the structural layer or structural foil 7 (with structural layer). After the passage of the press nip 10, the structural layer or structural film 7 (with structural layer) and the sheet material 6 guided on the impression cylinder 2 and coated with a lacquer layer are transported synchronously in the wrapping angle X on the impression cylinder 2 in the conveying direction 3.

Following the press nip 10, at least the lacquer layer is exposed to radiation or drying, in particular UV radiation. In this case, the sheet material 6 with lacquer layer and the structural layer or structural foil 7 are guided congruently in the conveying direction 3 in a wrap angle X on the sheet guiding cylinder 2 of the application unit B. At the end of the wrapping angle X, the outlet gap 11 is provided and in this the structural layer or structural film 7 is separated and removed from the lacquer layer adhering to the sheet material 6 and the sheet material 6 with the structured lacquer layer is deposited on the sheet guiding cylinder 2 (impression cylinder) Conveying direction 3 discharged

The drying of the lacquer layer takes place via a suitable first radiation / drying source 8 corresponding to the installation space, for example a UV LED dryer 8, which is assigned to the impression cylinder 2 between the press nip 10 and the deflection roller 15. In an alternative embodiment, the UV light of an existing intermediate UV dryer can be mirrored / focused in such a way that the radiation acts on the composite of structural layer or structural film 7 (with structural layer) and lacquer layer.

When guiding the structural layer or structural film 7 (with a structural layer) in the outlet gap 11, the deflecting roller 15 is not in direct contact with the sheet guiding cylinder 2 or counterpressure cylinder 2, thus exerts no pressure against it. As a result, the outlet gap 11 for the structural layer or structural film 7 (with structural layer) is formed by the deflection roller 15. Since the structure embossing by means of a structural layer or structural film 7 in the lacquer layer applied to the sheet material 6 is already effected in the press nip 10 of the application unit B between the blanket cylinder 1 and the impression cylinder 2, the guide roller 15 can smoothly detach the structural layer or structural film 7 (with structural layer) of the now structured paint surface support.

FIG. 2 shows a comparable embodiment. Here the application plant B is arranged on a printing unit C downstream module, from which the sheet material 6 is forwarded directly to a sheet delivery D. The module can be a paint module in the basic structure.

The paint feed to the sheet material 6 can be done here by the structure layer or structure film 7 by a metering device 17. For example, in the conveying direction 3 in front of the press nip 10, a metering device 17 for paint can be brought into contact with the structured surface of the structure layer or structure film 7 and a paint transfer onto the structure layer or structure film 7 takes place. In this case, the cylinder 1 of the application unit B with an order roller of the metering device 17 be in operative connection.

Furthermore, alternatively, the paint feed can also be effected in the upstream printing unit C directly or by means of a possibly adjustable integrated painting device (metering device 17).

In an alternative arrangement according to FIG. 3, a structural roller 30 (detailed representation in FIG. 4, for the variant described here, see the dashed representation in FIG. 3) is in contact with an impression cylinder 2 of a coating unit A, which can be used as application unit B. The wrap angle X for the structural layer or structural film 7 on the circumference of the impression cylinder 2 can be minimized in this arrangement. For this purpose, this structure roller 30 is constructed on a roller core 31 made of a roller body 32 which is permeable to UV radiation, in which UV LED emitter 34 is cast in a suitable arrangement in the circumferential and longitudinal direction or integrated in another form. The structural roll 30 is comparatively soft (sleeve or the like) on the surface of its roll shell 33, so that a defined overpressure to the impression cylinder 2 is possible. The (on) drying of the lacquer layer on the sheet material 6, which serves to maintain the embossed relief structure, takes place behind the press nip 10 and is accordingly carried out during the rolling over of the structure roller 30.

In an alternative embodiment, a UV intermediate dryer 8, which is oriented toward the lacquer layer, is used, and instead of the integrated UV LED spotlight 34, by means of suitable focusing or partitioning, a conventional UV intermediate dryer 8 radiating through the structure roller 30 can be used.

For clarity, the penetration of the structure roller 30 is indicated by the dryer radiation to the paint layer in Fig. 4. If the UV light permeable sleeve or the roll shell 33 of the structure roller 30 is provided directly on its surface with a structure which is pronounced as a micro-fine relief, the structure roller 30 can also directly in a forth conventional UV coating unit A on the impression cylinder 2 are used (see reference numeral 30 in Fig. 3 in solid lines).

To ensure the function of the structuring, a suitable cleaning device can then be provided on the structure roller 30, which keeps the said microfine relief in the roll shell 33 clean and thus enables the embossing effect in the lacquer layer at any time with full quality.

From the radiation / dryer sources 8, 9 can radiate heat to adjacent components or assemblies, which can be designed to be tempered by means of cooling devices. For example, the deflection rollers 15, the guide rollers 16, the structure roller 30 and, if required, the cylinder 1, which are in operative connection with the structural layer or structural film 7, can be cooled. The cooling of the inside and / or outside can act on the respective component or assembly.

For final drying of the structured lacquer layer on the sheet matehal 6, at least one radiation / drying source 9, for example a UV radiation / drying source, preferably a UV LED emitter 34, can be arranged in the sheet delivery D.

If necessary, the structural layer or structural film 7 can be formed endlessly circulating or by means of film supply roll 13 and film collecting roll 14, detachable / wound up.

To avoid charging processes, a discharge device may be provided in the application unit B, which discharges the structure layer or structural film 7.

The application plant B can be a lifting device or a handling device for exchanging or exchanging the respective structural film with a structural layer 7.

In addition to printing units C and / or coating units A and at least one application unit B, a processing machine may comprise a device for cold foil transfer to the sheet matehal 6. Such a device for cold foil transfer can upstream or downstream of the application unit 2 in the conveying direction 3 be. For example, in a device for cold foil transfer, a cold foil can be transferred to the sheet material and subsequently a surface structure of the lacquer layer on the sheet material takes place. In this case, the lacquer layer to be structured can also be applied to cold foil matehal which is already firmly adhered to the sheet material 6.

In addition to the first radiation / drying source 8 adjacent to the impression cylinder 23, a further radiation / drying source can be arranged inside the cylinder 1. This further radiation / drying source generates radiation which penetrates the contour of the cylinder 1 and acts at least on the lacquer layer on the sheet material 6 in the region of the press nip 10. For this purpose, the cylinder 1, at least in the direction of the circumference, has a material which allows the initiated radiation to pass in the direction of the sheet material 6 with lacquer and the structural layer or structural foil 7.

For the implementation of the process of embossing in the lacquer layer, it is necessary to lower the normally over the circumference of the impression cylinder 2 protruding gripper or to edit the gripper backs in a suitable manner. Alternatively, the grippers may be movable into the interior of the impression cylinder 2 at least at the passage of the press nip 10.

The protruding gripper backs would otherwise touch the structural layer or structural film 7 (with structural layer) or, in the alternative case, the structural roller 30 with each overrunning of the cylinder channel in the impression cylinder 2 and thus permanently damage it. To avoid this, the structural layer or structural film 7 (with structural layer) or the structural roller 30 would have to be lifted in line with the machine run. A detailed transfer of the relief would not be possible.

The film guide and drying according to the invention described above can be used optionally. Cold foil transfer with tangential film guidance is still possible as an alternative. LIST OF REFERENCE NUMBERS

1 cylinder (blanket / blanket cylinder)

2 impression cylinders

3 conveying direction

6 sheet material

7 Structural film / structural layer

8/9 Radiation drying source

10 press nip (printing / varnishing nip)

11 outlet gap

13 film supply roll

14 foil collecting roll

15 guide roller

16 guide roller

17 metering device

18 transfer cylinders

19 plate / Formzyl Indian

20 inking unit

21 dampening unit

22 conveyor

23 delivery pile

30 textured roller

31 rolls core

32 roll body

33 roll jacket

34 UV LED spotlights

A coating unit (flexographic printing unit)

B application plant

C printing unit

D bow boom

X wrap angle

Claims

claims

A method of forming a patterned layer on a sheet material

(6) in a processing machine, comprising means (A) for coating the sheet material (6) with a lacquer layer, and subsequently a device (B) deforming the surface of the lacquer layer, the sheet material (6) being conveyed in the conveying direction (FIG. 3) leading counter-pressure cylinder (2) and a further cylinder (1, 30) a press nip (10) is formed, through which the sheet material (6) is guided with the overlying lacquer layer, and wherein the surface of the sheet material (6) opposite one

Structural layer (7) is arranged, wherein in the press nip (10), the structural layer

(7) is pressed onto the sheet material (6) coated with the lacquer layer by means of a force,

characterized,

that only in the press nip (10) a surface-related force on the sheet material (6) with lacquer layer and the structural layer (7) is produced, that following the press nip (10) the structural layer (7) and on the impression cylinder (2) guided sheet material (6) coated with a lacquer layer are conveyed synchronously on the counterpressure cylinder (2) in the conveying direction (3) at a wrap angle (X),

that at least the lacquer layer is exposed to radiation or drying and

in the conveying direction (3) after the wrap angle (X) in an outlet gap (11), the structure layer (7) is separated and removed from the lacquer layer and the sheet material (6) with the structured lacquer layer on the lacquer layer

Counter-pressure cylinder (2) in the conveying direction (3) is continued.

2. A device for producing a structured layer on a sheet material (6) in a processing machine, comprising means (A) for coating the sheet material (6) with a lacquer layer and a downstream applicator (B), with a sheet material (6) in Conveying direction (3) leading impression cylinder (2) and a further cylinder (1), which form a press nip (10), wherein the sheet material (6) is guided through the press nip (10) with a lacquer layer on the surface and a structure layer (7) opposite the surface of the sheet material (6) and in the press nip (10). the structure layer (7) can be pressed by means of a force onto the sheet material (6) coated with the lacquer layer for structuring the lacquer layer,

characterized,

that only the impression cylinder (2) and cylinder (1) forming the press nip (10) comprise means for producing a surface-related force acting on the sheet material (6) with lacquer layer and the structural layer (7),

in that, following the press nip (10), the structure layer (7) and the sheet material (6) coated with the lacquer layer can be conveyed synchronously on the impression cylinder (2) in the conveying direction (3) in a wrap angle (X),

that in the region of the wrap angle (X) the counterpressure cylinder (2) leading to the sheet material (6) with lacquer layer and structural layer (7) is arranged adjacent to a radiation / drying source (8) at a distance from the hardening of the lacquer layer, and

that in the conveying direction (3) after the wrap angle (X) has an outlet gap

(11) is arranged, in which the structured layer (7) with a structured surface of the sheet material (6) with structured lacquer layer is separable and the sheet material (6) with the structured lacquer layer on the impression cylinder (2) in the conveying direction (3) further transportable is.

3. Apparatus according to claim 2,

characterized,

a structural film (7) carrying the structural layer (7) is arranged in the application unit (B) and can be transported together with the sheet material coated with a lacquer layer through the press nip (10) between the impression cylinder (2) and the cylinder (1) ,

4. Apparatus according to claim 2,

characterized,

in that the application work (B) has a structural roller (30) which forms the press nip (10) with the impression cylinder (2), and in that the structure roller (30) has at least one roll shell permeable to the radiation

(33) and that at least one radiator for generating a radiation effect through the structure roller (30) in the press nip (10) is provided.

5. Apparatus according to claim 2,

characterized,

the cylinder (1) has a cylinder channel.

6. Apparatus according to claim 2,

characterized,

in that the cylinder (1) is coupled to means for generating a surface-related force and a positional change of the cylinder (1).

7. Apparatus according to claim 2,

characterized,

in that a radiation / drying source 9 is arranged in the sheet delivery (D).

8. Apparatus according to claim 2,

characterized,

in the application plant (B) a discharge device for unloading the

Structure layer or structural film (7) is provided.

9. Apparatus according to claim 2,

characterized,

that the application work (2) a device for cold foil transfer to the

Bogenmatehal (6) upstream or downstream in the conveying direction (3).

10. Apparatus according to claim 2,

characterized,

in that a radiation / drying source is arranged inside the cylinder (1).