WO2008077496A2

WO2008077496A2 - Modular film unit

Info

Publication number: WO2008077496A2
Application number: PCT/EP2007/010940
Authority: WO
Inventors: Mario Preisner
Original assignee: Manroland Ag
Priority date: 2006-12-20
Filing date: 2007-12-13
Publication date: 2008-07-03
Also published as: CN101563228B; EP2104614B1; DE502007004967D1; WO2008077496A3; EP2104614A2; ATE479545T1; US20100006234A1; DK2104614T3; JP2010513075A; CN101563228A

Abstract

In order to transfer an image-type coating from a carrier film to a printed sheet, an image-type adhesive is applied to the printed sheet. In a film transfer module (2), the carrier film comprising the image-type coating is rolled over the printed sheet using contact pressure such that the coating adheres to the adhesive sections, thus forming an image. In order to improve the function, simplify the device and increase flexibility, a holder for film rolls of the transfer foil (5) is provided, allowing simplified handling.

Description

Modular film unit

The invention relates to a device for transferring imaging layers from a carrier film to printing sheet according to the preamble of patent claim 1.

It is known to produce metallic layers on printed sheets by means of a film transfer process. Thus, EP 0 569 520 B1 describes a printing material and a printing device using this material. In this case, a sheet-processing machine is shown, which has a feeder and a boom, between which two units printing units and a film transfer module 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 the printing unit following the film transfer module with a counter-pressure cylinder and a transfer cylinder, a film guide is provided. This is designed in such a way that a film strip or a transfer film is guided through the transfer nip of the film transfer module between the impression cylinder and the transfer cylinder by a film supply roll. The film strip is rewound on the exit side after leaving the film transfer module. The transfer film has a carrier layer on which imaging layers such as metallic layers, for example of aluminum, can be applied. When printing sheets are transported through the printing unit, each sheet is given an adhesive pattern. Thereafter, the sheet is passed through the film transfer module, wherein by means of the transfer cylinder, the resting on the impression cylinder sheet is brought into contact with the film material. In this case, the downwardly lying metallic layer enters into a close connection with the areas provided with adhesive on the printed sheet. After further transporting the printing sheet, the metallic layer adheres only in the area provided with the adhesive pattern. The carrier film thus becomes the metallic layer in the region of the adhesive removed. The used in this way transfer film is wound up again. The print sheet is laid out in the coated state. It is known to use such film transfer modules, for example in printing units of printing presses. A disadvantage of the known devices is that they are not flexible and that the consumption of transfer film is expensive.

The object of the invention is therefore to provide a device by means of which the transfer of an imaging layer, e.g. a Metallisierungsschicht safely, economically and can be done exactly, the device should be easy to handle.

The solution to this problem results in a device according to the features of claim 1.

Advantageously, a method is used to guide the transfer film, in which the film web is stored on one or more film rolls and can be used for changing film rolls by means of an adhesive device within the same recording an existing film roll used.

In devices according to the invention, recordings for film rolls are provided in two variants, which allow easy replacement of one or more film rolls. In a first variant, the receptacles can be provided in a module, wherein at least two axes for receiving film rolls are arranged one above the other. One or more film rolls can be mounted on each axis. The or the axes can be assigned drives. Each holder of a film roll may be associated with a web tension unit. In this way, an improvement in set-up times is achieved in conjunction with a film transfer module. In a second variant, the receptacles can be provided in two modules, wherein in each module at least two axes for receiving film rolls are arranged one above the other. One or more film rolls can be mounted on each axis. The or the axes can be assigned drives. At least in one module, one or each support of film rolls may be associated with a web tension unit. In this way, a further improvement of set-up times is achieved in connection with a film transfer module by the replacement of film rolls is greatly simplified.

In the following the invention is illustrated in more detail with reference to figures. Showing:

1 shows a basic illustration of a printing press with a film transfer device, FIG. 2 shows a first module according to the invention for receiving film and FIG

Figure 3 shows a second module according to the invention for film recording.

FIG. 1 shows a sheet-processing machine, here a printing press, which consists of at least two printing units. A sheet to be coated is provided in a first step in the applicator 1 with an imaging adhesive pattern. For this purpose, a printing unit of an offset printing press with dyeing and dampening units 11, a printing plate on a plate cylinder 12, a blanket or blanket cylinder 13 and a counter-pressure cylinder 4 can be used. In the second step, together with the. Sheet a transfer sheet 5 under pressure through a transfer nip 6 out. A film transfer module 2 used for this purpose may be a printing unit, a paint module, a base unit or another type of processing station of a sheet-fed offset printing press. The transfer nip 6 in the film transfer module 2 is formed by a transfer cylinder 3 and an impression cylinder 4. The transfer cylinder 3 may be a blanket or form cylinder of a known offset printing unit or Paint module correspond to a sheetfed offset press. Within the film transfer module 2, a web guide for transfer films 5 is shown.

The device can also be arranged as an integrated film transfer module FA within a printing unit.

In the basic illustration according to FIG. 1, a film supply roll 8 is assigned to the film transfer module 2 on the side of the sheet feed. The film supply roll 8 has a rotary drive 7. The rotary drive 7 is required for continuous regulated feeding of the transfer film 5 to the film transfer module 2 and is therefore controllable. Furthermore, in the field of film feed and removal guide devices 14, such as deflection or tensioning rollers, pneumatically actuated conducting means, baffles o. Ä. Provided. Thus, the film web of the transfer film 5 can always be guided flat without distortions and held in the same voltage with respect to the transfer cylinder 3.

The transfer film 5 can be guided around the transfer cylinder 3, wherein the transfer film 5 can advantageously be fed in and out of the transfer nip 6 only from one side of the film transfer module 2 (see dotted representation). Furthermore, the transfer film 5 can also be substantially tangential on

Transfer cylinder 3 or this only in a small circumferential angle are looped around in the transfer nip 6. Here, the transfer film 5 is fed to one side of the film transfer module 2 and discharged to the opposite side. On the discharge side of the printing unit, a film collecting roller 9 is shown, by means of which used film material is wound up. Again, a rotary drive 7 is provided, which is controllable.

In addition, dryer 16 can additionally be arranged in the film transfer module 2 or FA in order to pre-dry the adhesive on the printing substrate and / or to finish drying the finished coating. By means of an inspection device 17, the coating quality can be observed. Finally, cleaning devices R can also be provided in the film transfer module 2 or FA, around the web of film of the transfer film 5 falling and possibly to remove the cylinder ^"which adherent impurities from the machine.

FIGS. 2 and 3 show devices according to the invention for receiving film rolls.

FIG. 2 shows a device in the embodiment with a single receiving module 19 for film rolls 20, 21, which is placed on the film transfer module 2 or FA. The receiving module 19 is provided with two axes 22, 23 for holding film rolls 20, 21. On each axis 22, 23, one or more film rolls 20, 21 can be supported correspondingly in the direction of transport of the printing sheets to be coated parallel to each other processing tracks. The feed of the transfer film 5 to the transfer nip 6 is effected by one or more film rolls 20 held on the lower axis 22 on the right side of the film transfer module 2 or FA. The return of the used transfer film 5 takes place from the transfer nip 6 parallel to the film transfer module 2 or FA up to one or more supported on the upper axis 23 film rolls 21. All axes 22, 23 can be provided to drive or brake the film rolls 20, 21 with rotary actuators be.

Below the lower axis 22 or held there of the film rolls 20, a web tension unit 24 is arranged. The web tension unit 24 may be designed as a retractable module. It has a plurality of guide rollers 25, which are adjustable in accordance with the required web tension of the film web with respect to the path thereof. The adjustment can be regulated as a function of the web tension.

Depending on the number of film rolls 20 arranged on the axis 22 corresponding to the processing tracks, a plurality of web tensioning units 24 may also be arranged interchangeably as modules parallel to each other. In this arrangement, it is therefore possible to work both with one format width or with several part width film webs.

FIG. 3 shows a device with a first receiving module 19 for film rolls 27, 28 according to FIG. 2 and a second receiving module 26 for film rolls 30, 31. The first receiving module 26 is placed on the film transfer module 2 or FA and the second receiving module 29 is placed on a downstream printing or processing unit 32 of the sheet-processing machine. Each of the receiving modules 26, 29 is provided with two axes 33, 34 and 35, 36 for holding film rolls 27, 28 and 30, 31 respectively. On each of the axes 33, 34 and 35, 36, one or more film rolls 27, 28 and 30, 31 can be supported according to the processing tracks to be supplied on the sheet to be coated. All axes 33, 34 and 35, 36 can be provided with rotary actuators for driving or braking the film rolls 27, 28 and 30, 31.

The feeding of the transfer film 5 to the transfer nip 6 takes place from one or more film rolls 27, 28 from the first receiving module 26. In this case, the transfer film 5 per processing track can be supplied to the transfer nip 6 either from film rolls 27 held on the lower axis 33 or also from film rolls 28 held on the upper axis 34 on the right side of the film transfer module 2 or FA.

The return of the used transfer film 5 takes place from the transfer nip 6 from parallel to the film transfer module 2 or FA to the second receiving module 29 and to the upper and lower axes 35, 36 of the supported film rolls 30, 31.

In the first receiving module 26, a web tension unit 37 is arranged below the lower axis 33 or the film rolls 27 held there. The web tension unit 37 may be designed as a retractable module. It has a plurality of guide rollers, which are adjustable in accordance with the required web tension of the film web with respect to the path thereof. The adjustment can be regulated as a function of the web tension. Depending on the number of corresponding to the required processing traces on the axes 33, 34 arranged film rolls 27, 28 may be arranged in parallel to each other and several web tension units 37 as modules interchangeable. Furthermore, the upper axle 34 and the film rolls 28 held thereon are assigned one or more responsive web tension units 38.

Also in the last-described arrangement, it is possible to work both with a format-wide or with a plurality of part-width film webs or correspondingly required processing tracks arranged transfer films.

The arrangement also allows operation according to a quick-change concept, in which several film rolls can be used per processing track. Furthermore, an equipable within the printing machine with film rolls device is provided which is operable in the manner of a roll changer.

For this purpose, in the receiving module 26 described in FIG. 3, a supply roll 28 for transfer film 5 can already be provided on a free axis 34, while the active film roll 27 is processed. At or shortly before the complete consumption of the transfer film 5, the supply roll 28 can be connected by means of bonding with the active film roll 27 at a standstill. This can be done semi-automatically, manually or with auxiliary means. Thus, the new transfer film from the new film roll 28 can be fed directly into the film transfer module 2 by means of the transfer film currently being processed.

In conjunction with this, the system described can also be automated. For this purpose, a sufficient amount of transfer film 7 can be stored in a magazine, eg in conjunction with a web tension unit 37 or 38 for the outgoing transfer film from the active film roll 27. Then, adhesion between the active film roll 27 and the new roll 28 to be taken into use can take place. With appropriate acceleration of the subsequent use film roll 28, possibly up to machine speed, the change process between old and new film roll 27 and 28 is reduced so much that quasi a continuous role change takes place. This is also a full automation possible, as is common in automatic reel splicers in web-processing printing machines.

In this case, the conventional arrangement of the film transfer module via two printing towers, as shown in Figure 1, is obtained.

In this case, the winding film rolls 30, 31 can also be arranged twice. Even if an automated roll change from a full to an empty take-up roll is realized there, the up- and down-turn operations can be performed during non-productive or auxiliary times with minimal or even no production stoppages.

Furthermore, the arrangement can be improved by a loading and unloading of the axes 22 and 33, 34 and 23 and 35 and 36 of the receiving modules 19 and 26 and 29 via the end faces, e.g. done from the back of the printing machine ago.

The web tension units 37, 38 shown in Figures 2 and 3 extend over the entire width of the device. Thus, any arrangement and width of the film webs or partial film webs during cold foil transfer is possible. The web guide can therefore be chosen completely variable with respect to the position and width of the sub-film webs and their arrangement with respect to the position of the processing tracks on the substrate.

To further improve the arrangement is provided to associate the film guide means for detecting the splice in the film web. A corresponding sensor arrangement is arranged between the film roll-off in the receiving module 19 or 26 and the feed of the transfer film 5 to the transfer nip 6 in the film transfer module 2. By means of the recognition of the splice, the sheet or sheets coated with the splice or the area before and after the splice can be recognized and sorted out by means of appropriate aids in the delivery pile of the printing press. This can be done by means of a computer, the corresponding movement distance of sheet or transfer film are calculated. Alternatively, the splice can be marked and sensory detected by means of an RFID transponder or a magnetic strip. In this case, it is possible to transfer the marking element to the printed sheets even with multiple film webs. Then different benefits to the discharge existing on the sheet can be recognized as defective in a further processing station, so that benefits with Folienklebestelle be safely sorted out.

Furthermore, the removal of the used film web after the transfer gap can be done via turning bars, so that they can be led out laterally from the printing press. Then, a reel above of the press arranged auxiliary equipment is possible. Likewise, the used film web can be shredded there and vacuumed.

Overall, therefore, can be used in the described device according to the required on the sheet to be coated printing process traces with a format-wide film roll or several narrower film rolls on the format width. The processing can be clocked or unclocked.

In conjunction with a film tear detection, a film cap device may be associated with film catcher in the vicinity of the unwinding to the film transfer module to prevent machine damage. The film tear detection takes place from the web tension detection or control and / or a sensor for web monitoring. LIST OF REFERENCE NUMBERS

1 applicator

2 film transfer module

3 transfer cylinders

4 impression cylinders

5 transfer foil / foil web

6 transfer gap

7 roller drive

8 foil supply roll

9 foil collecting roll

10 press clothing

11 inking / dampening unit

12 plate cylinders

13 blanket cylinder

14 guide device

15 protection

16 UV dryers

17 monitoring system

18 dancer roller

19 Recording module

20 film roll (winding)

21 film roll

22 axis

23 axis

24 web tension module

25 guide roller

26 recording module

27 film roll

28 film roll

29 Recording module

30 film roll (winding)

31 film roll (winding) Printing or processing plant

axis

Web tension unit

Foil transfer module

Claims

claims

1. An apparatus for transferring image-forming layers from a carrier film, which together form a transfer film (5), on printed sheets according to the cold-film transfer method in a sheet-processing machine having at least one film transfer module (2, FA) in which a transfer cylinder (5) a transfer sheet (6) is assigned to a sheet leading impression cylinder (4) forming the transfer sheet (5) adjacent to the transfer cylinder (3) and together with printed sheet to be coated through the transfer nip (6), characterized in that the film transfer module (2) / (FA) a receiving module (19, 26) for film rolls (20, 21, 27, 28) with two mutually offset axes (22, 23, 33, 34) is assigned.

2. A device according to claim 1, characterized in that one of the film transfer module (2) / (FA) downstream processing unit (32) of the sheet processing machine another receiving module (29) for film rolls (30, 31) arranged with two offset from one another Axes (35, 36) is assigned.

3. Apparatus according to claim 1 or 2, characterized in that the axes (22, 23, 33, 34, 35, 36) for receiving film rolls (20,

21, 27, 28, 20, 31) in the first receiving module (19, 26) and / or the second receiving module (29) are arranged in different planes one above the other and / or offset from one another in the horizontal direction.

4. Apparatus according to claim 1 to 3, characterized in that the axes (22, 23, 33, 34, 35, 36) in the first receiving module (19, 26) and / or the second receiving module (29) for receiving film rolls (20, 21, 27, 28, 20, 31) are formed for one or more adjacent processing tracks.

5. Apparatus according to claim 1 to 4, characterized in that the lower axis (22, 33) of the first receiving module (19, 26) is associated with at least one module (24, 37) for web guiding and for controlling or regulating the web tension.

6. Apparatus according to claim 1 to 4, characterized in that the lower axis (22, 33) and the upper axis (23, 34) and each further axis of the first receiving module (19, 26) each have at least one module (24, 37 , 38) for web guidance and for the control or regulation of

Web tension are assigned.

7. Apparatus according to claim 5 or 6, characterized in that the one or more modules (24, 37, 38) for web guiding and for controlling or regulating the web tension over the entire or a partial width of the film transfer module (8, FA) reaching and / or are designed to act separately for each processing track.

8. Apparatus according to claim 5 to 7, characterized in that the one or more modules (24, 37, 38) are designed for web guidance and for controlling or regulating the web tension as exchangeable modules.

9. Apparatus according to claim 5 to 8, characterized in that the module or modules (24, 37, 38) for web guidance and for controlling or regulating the web tension are designed as film web memories.

10. The device according to claim 9, characterized in that the module or modules (24, 37, 38) for web guiding and for controlling or regulating the web tension means for firmly adhering connection of ends of film webs of transfer film (5) are assigned.

11. The device according to claim 1 to 10, characterized in that the one or more modules (24, 37, 38) for web guiding and for controlling or regulating the web tension means for firmly adhering connection of two webs of transfer film (5) in the region of the end portion a first film web are associated with the initial portion of a second film web.

12. The device according to claim 11, characterized in that the module or modules (24, 37, 38) for web guidance and for controlling or regulating the web tension are associated devices for firmly adhering connection of film webs of transfer film (5), wherein the film webs of Film rolls are discharged on different axes.

13. The device according to claim 1 to 12, characterized in that the module or modules (24, 37, 38) are assigned to the web guide sensors for detecting connecting regions of two film webs of two different film rolls of the transfer film (5).

14. film guide in a device for transfer of imaging layers according to one or all of claims 1 to 13, characterized in that in a first operating state transfer film (5) as a fresh film web / s for one or more processing tracks of one per processing track on a first axis (22) content Erten first film roll (20) of the film transfer module (2, FA unrolled and as a used film web / s on each one per processing track on a second axis (23) which is arranged vertically and / or horizontally offset from the first axis (22), provided second film roll (21 ) of the same recording module (19) is rolled up.

15. film guide in a device for transfer of imaging layers according to one or all of claims 1 to 13, characterized in that in a second operating state transfer film (5) as fresh film web / -en for one or more processing tracks per one processing track first film roll (20) held on a first axis (22) and / or on one or more further axes (33, 34) and retained further film rolls (27, 28) of a first receiving module (26) associated with the film transfer module (2, FA) be attached, that transfer film (5) only from one of the film rolls (27, 28) per processing track unrolled, for

Transfer gap (6) passed and as a used film web / on one per processing track on at least a first and / or one or more further axes (35, 36) provided first and / or one or more film rolls (30, 31) of a second Recording module (29) is rolled up.

16. film guide according to claim 14 or 15, characterized in that in the first receiving module per processing track at or before the end of consumption of the transfer film (5) of the rolling film roll a connection process is initiated, wherein an end of the running film web is generated and the end of the running film web with a beginning of the non-rolling web of the same processing track is bound and that the unwinding and feeding of the transfer film (5) of the respective processing track to the transfer nip (6) of the newly connected film roll is continued.

17. film guide according to claim 14 to 16, characterized in that the connecting operation is carried out simultaneously for all processing tracks.

18. film guide according to claim 14 to 16, characterized in that the connecting operation is carried out separately for each processing track.

19. A film guide according to claim 14 to 18, characterized in that the position of the connection points of the film webs for each processing track is detected separately sensory, that the position of the connection points is calculated in relation to the position of a sheet to be coated net and that to be coated Printed sheet or the area of the sheet to be coated on which the film transfer takes place in the region of a connection point is marked.

20. Film guide according to claim 19, characterized in that the marked printed sheet and / or the marked area of the printed sheet are marked or rejected in the delivery area of the sheet-processing machine.