WO2009121717A1

WO2009121717A1 - Rotary printing press which processes printing material

Info

Publication number: WO2009121717A1
Application number: PCT/EP2009/053143
Authority: WO
Inventors: Reinhold Guba; Jürgen Schölzig
Original assignee: Manroland Ag
Priority date: 2008-04-04
Filing date: 2009-03-17
Publication date: 2009-10-08
Also published as: DE102008001003B3

Abstract

The invention relates to a rotary printing press which processes printing material. The invention is based on the problem of providing a rotary printing press which processes printing material, further improves the flexibility of at least one printing unit and configures the possible uses of a rotary printing press to be more universal. This is achieved by, starting from at least one printing unit having a blanket cylinder, a varnishing apparatus being assigned such that it can be thrown off and onto the blanket cylinder, wherein the plate cylinder of the printing unit and the blanket cylinder can be separated in a contact zone, the blanket cylinder 12 is received rotatably in a variably placed bearing 32, a first cam element 29 is fixed on the variably placed bearing 32, the varnishing apparatus 17 comprises a second cam element 30, and both cam elements 29, 30 form a curved joint when the varnishing apparatus 17 is thrown on at a pairing point.

Description

Substrate printing rotary printing machine

The invention relates to a printing material-processing rotary printing press according to the preamble of claim 1. The invention is particularly suitable for a rotary printing press with at least one, for example, as an offset or flexographic printing unit designed printing unit.

A rotary printing machine of this type is known from DE 197 29 985 A1, wherein an offset printing unit additionally comprises a painting device. To increase the value of use of the offset printing unit, a metering device consisting of a chamber doctor blade and screened applicator roller is arranged and stopped by means of frame-fixed guides, preferably horizontally, on a blanket cylinder of the offset printing unit. In this case, starting from the side of the rotary printing machine which removes the printing material, the painting device can be set or set down on the blanket cylinder or starting from the side of the rotary printing press which feeds the printing material to the blanket cylinder. In the contact zone of the plate cylinder and the blanket cylinder, a separation is carried out, so that the plate cylinder is not involved in the painting process.

From US 4,617,865 a painting is known, which - starting from the boom side of a sheet material processing rotary printing press - can be brought on inclined longitudinal guides with a blanket cylinder of the final printing unit in contact. The dosing system consists essentially of a paint reservoir, a dipping into the paint reservoir scoop and a blanket cylinder associated applicator roll.

A rotary printing machine with series-arranged printing units is known from EP 0741 025 B1, wherein each printing unit has a plate cylinder, a blanket cylinder and a printing cylinder. In at least one of the printing units a by means of a rocker (similar to a Ferris wheel gondola) pivotable coating device is arranged with an applicator head. The coating device is pivotally fixed above the plate cylinder on the printing unit in a storage. On the bearing a pivotable arm is on both sides and connected to this arm is pivotable about a swivel joint in side walls of the applicator head as dosing from the boom side to the plate cylinder or the blanket cylinder and off. The applicator head comprises a chamber doctor blade and an applicator roller via which the plate or blanket cylinder is supplied with printing ink or coating fluid. A force actuator is disposed respectively on the arms and serves to lock the applicator head in the operating position.

According to US Pat. No. 5,107,790, a printing unit with an impression cylinder, a blanket cylinder and a plate cylinder (with associated dyeing and dampening unit) is known, which has two, optionally usable coating devices. The one coating device can be set in the conveying direction of the printed matter in front of the printing unit to the plate cylinder and off of this. The other coating device can be adjusted in the conveying direction of the printing material after the printing unit to the blanket cylinder and disposed thereof ablated by means of lifting device.

The invention is based on the object to provide a printing material processing rotary printing machine of the type mentioned, which further improves the flexibility of at least one printing unit and makes the application possibilities of a rotary printing machine more universal.

The problem is solved by the training features of claim 1. Further developments will become apparent from the dependent claims. A first advantage of the invention is that on at least one printing unit, preferably an offset printing unit or a flexographic printing press, the rotary printing machine is preferably arranged integrally and that selectively printed in the printing unit by means of plate / forme cylinder (with inking unit) and blanket cylinder or in Combination of varnishing device and blanket cylinder painted (full surface or spot varnish) can be. If necessary, at least one other or each printing unit of a rotary printing press can be equipped with such a painting device. The arrangement of the painting device is thus not limited to a final printing unit, as described in the following embodiment. The option provides at least one such printing unit of the rotary printing machine more flexibility and also provides a simple, cost-effective solution, especially for printers with a small proportion of painted print jobs, is.

However, such a rotary printing press is not limited to printing units with at least one painting device according to the invention. Rather, such printing units can be at least one independent, preferably modular coating unit upstream and / or downstream in the conveying direction of the printing material. Depending on requirements, printing units or coating units are supplied or arranged downstream of drying units.

In an advantageous embodiment, several printing units for the color printing of a first printing material side can preferably be arranged in the conveying direction of the printing material, and preferably at least one downstream drying device follows, if necessary followed by an independent, preferably modular coating unit, subsequently a turning device and then printing units for the color printing of the second substrate side preferably with at least one printing unit with inventive painting and preferably at least one downstream dryer device. If necessary, this dryer can be be an independent, preferably modular coating unit downstream. The independent coating units can each be followed by a further drying device.

As a second advantage is to be mentioned that instead of printing ink any kind of paint, including oil pressure varnish, in particular protective, gloss, matt or effect varnish, if necessary, flexographic ink, can be processed by means of the respective painting in the printing units. In this case, the paint can be applied to the printing material over the entire surface or partially (spot coating) or for pre-coating or final coating by means of the respective blanket cylinder. On the blanket cylinder is a planographic print form with an elastic surface, preferably a compressible blanket (including a recessed blanket) or an elastic high-pressure form fixable. Alternatively, a rubber blanket known per se (rubber sleeve) can be arranged on the blanket cylinder.

In one embodiment, the blanket cylinder in addition to the blanket clamping shafts or other clamping devices and clamping rails for receiving the format-related underlay sheet (sheet format) on. These underlay sheets can be pre-assembled in the clamping rails. In this case, the printing blanket cylinder is always associated with the printing material leading impression cylinder adjacent in a printing or painting.

The third advantage is provided by the fact that, in the case of a printing unit, the painting device can be brought into contact with a blanket cylinder of the printing unit at the side to be conveyed to or removed from the printing material. This allows a relation to the blanket cylinder on the opposite side to the painting of the printing unit arranged / left blanket washing device remain in their respective installation position, so that the blanket cylinder (or the blanket fixed thereto, the flexible high pressure form or sleeve) immediately after can be cleaned to the painting process and advantageously no further changeover times arise. In a further development, the blanket washing device can be designed such that, optionally or in combination, the blanket cylinder and additionally the adjacent printing cylinder can be cleaned.

By remaining in the installation position, there is no expense for dismantling or pivoting the painting device. The applicator roll is separated only at the contact point to the blanket cylinder, preferably turned off, and the drive of the applicator roll is stopped or is separated, for example, by uncoupling the applicator roll from the respective drive. Alternatively, the parked application roller can continue to be driven by means of preferably switchable auxiliary drive, for example, to prevent paint from drying on.

In an advantageous manner, after a first drive variant on the application roller - starting from the blanket cylinder - a drive can be fed. After a second drive variant can - starting from the adjacent pressure cylinder - a drive to be fed to the applicator roll. Alternatively, the application roller with a single drive, which is preferably controllable in a predeterminable manner, be coupled.

The fourth advantage is that such a printing unit has a blanket cylinder which is positionally displaceable positionable. These include a print-on position (transfer function of ink / coating on the substrate) or a print-from position (interruption of the transfer function) and a further printing allowance (change in position of the blanket cylinder for the purpose of setting the printing force). This spatially changeable blanket cylinder is associated with the painting device, in particular its metering device, on / off. The painting device, in particular the metering device, is preferably formed from at least one chamber doctor blade and a screened application roller. In this case, the painting device by means of gear technology to the blanket cylinder on or off and preferably adjustable with respect to the contact force. In addition, the metering device is advantageously the above Followable positions of the blanket cylinder following. The advantage here is that the line of action of employed applicator roller and portable rubber blanket cylinder always remains unchanged. For this purpose, a mating point of a cam joint can be arranged on a line of action formed by the respective axis position of blanket cylinder and adjacent applicator roller. For a process-stable dosage of the respective medium can be realized.

Further advantages of the invention are that the printing unit with painting in the conveying direction of the printing material one or more coating units can be upstream or downstream. Thus, for example, by means of the painting device according to the invention on a printing unit pre-painted (full-surface or partial coating) and then in a (directly or not directly) in the conveying direction of the substrate downstream coating unit a second coating (full-surface coating or spot coating) are applied to the substrate. The same or different paints can be used and differentiated gloss levels or matt effects as well as plasticity effects on the printing substrate can be achieved.

Alternatively, additional coatings, for example in a further coating unit and / or by means of a further, inventive coating device on a printing unit, be applied to the substrate.

The invention will be explained in more detail using an exemplary embodiment. Here are shown schematically:

1 is a rotary printing machine for sheet-shaped substrates with multiple printing units,

2 shows an offset printing unit with a painting device,

Fig. 3 is a coupling of the paint device with a

Blanket cylinder of the offset printing unit.

In a rotary printing machine, in particular an offset printing machine for processing sheet-like substrates, several printing units 3 to 7 for arranged the multi-color printing in a row construction. The rotary printing machine further comprises a feeder 1 and a feed table 2 with system, which are arranged upstream of the first printing unit 3 in the conveying direction 15 of the sheet-shaped substrates. The last printing unit 7 is followed by a per se known boom 8 in the conveying direction 15. Each of the printing units 3 to 7 each comprise a plate cylinder 11 which is in operative connection with one inking unit 13 and, if necessary, one dampening unit 14 each. Each plate cylinder 11 is further in each case with a blanket cylinder 12 in operative connection.

For the transport of the printing material in the conveying direction 15 cylinders 9, 10 are arranged. In the present rotary printing machine, a sheet-shaped printing material is processed, so that the cylinders 9, 10 are formed as sheet guiding cylinders 9, 10 with sheet-holding means, for example grippers. The sheet guiding cylinders 9 are formed as a pressure cylinder 9 and form with the respective adjacent blanket cylinder 12, a first gap 18, which acts as a pressure nip. The sheet guiding cylinders 10 are designed as transfer cylinders 10, wherein in each case at least one transfer cylinder 10 is arranged between the printing units 3 to 7.

Preferably, the blanket cylinder 12 is associated with a cleaning device 16 on / off adjustable. In a further development, this cleaning device 16 may be formed on the adjacent pressure cylinder 9 on / off. In the conveying direction 15, after the printing gap (first gap 18) formed from blanket cylinder 12 and printing cylinder 9, a drying device 22 is arranged, which dries or hardens the paint or lacquer previously applied to the printing substrate.

In the present example, the inventively designed coating device 17 is arranged on the printing unit 7 (final printing unit). The printing unit 7 comprises the blanket cylinder 12, which is rotatably accommodated in a movable mounting 32, 32 'on both sides in the respective side frame. This bearing 32 serves for the positional displacement of the blanket cylinder 12 in pressure-on position. on, print-off position or for printing in the printing gap (first gap 18). Each bearing 32 may preferably be formed as Exzenterlagerung.

At the location-adjustable mounting 32 of the blanket cylinder 12, a first cam member 29 is fixed. The cam member 29 may be circular, preferably formed with respect to the blanket cylinder 12 with the same radius (Fig. 3).

The painting device 17 further comprises a second cam member 30. Both cam members 29 (on the bearing 32) and 30 (on the painting device 17) form a curved joint in a mating station when the rubber blanket cylinder 12 is in a painting position.

In a preferred embodiment, the first cam member 29 may be formed as a curve segment. The second cam member 30 may preferably be adjustable with respect to the first cam member 29. Thus, the contact force of the applicator roller 20 (the blanket cylinder 12) in the mating point of the cam joint 29, 30 is adjustable. In a simple embodiment, the second cam member 30 may be formed as a cam roller. By means of an eccentric, the cam roller can be adjustable. Alternatively, the second cam member 30 may have a flat, plate-shaped contour and be adjustable if necessary. Gear technology is thus a cam gear, wherein the first cam member 29 is the cam carrier and the second cam member 30 may have a geometrically simple surface as mating surface as engagement or scanning member.

The mating point of the cam joint 29, 30 is preferably arranged on a line of action formed by the respective axis position of blanket cylinder 12 and applicator roll 20.

In one embodiment, for painting on / off the painting device 17 to the adjacent blanket cylinder 12, the painting device 17 may be coupled with a coupling mechanism 31, 33, 27 geared. Preferably, the second cam member 30 is fixed to the painting device 17 or especially the coupling gear 31, 33, 27. The second cam member 30 may be arranged in a joint 36 on the painting device or especially the coupling gear 31, 33, 27. Preferably, the joint 36 is technically a rotary joint or a sliding joint. The joint 36 may be arranged in an education on the line of action 35.

The coupling mechanism 31, 33, 27 comprises a stationary, preferably each one arranged on the side frame bearing 31. At this bearing 31, a rocker 33 is mounted in a rotary joint and at the free end of the rocker 33 is an actuator 27 articulated. The actuator 27 is preferably formed by a respective articulated on the frame cylinder, for example, a hydraulically or pneumatically actuated cylinder.

The painting device 17 furthermore comprises, as a metering device 20, 21, at least one preferably screened application roller 20 and a chamber doctor blade 21. The metering device 20, 21 is preferably fixed in a receptacle 28 on both sides, for example one bearing plate each. The drivable applicator roller 20 of the painting device 17 may be coupled to a single drive.

Alternatively, the application roller 20 of the painting device 17 can be coupled with a main drive 34 with a common gear train for the cylinders 9, 10 leading to the printing material and at least the blanket cylinder 12. This corresponds to a first drive variant A (FIG. 2). From the blanket cylinder 12 is thus a drive to the applicator roller 20 of the paint device 17 can be fed, wherein the blanket cylinder 12 is coupled to a main drive 34 and common gear train for the printing material leading cylinder 9, 10.

In a further embodiment, which corresponds to a second drive variant B (FIG. 2), an input drive can be fed to the application roller 20 from the immediately adjacent pressure cylinder 9 which can be operated by the main drive 34 (with gear train). According to the second drive variant B, starting from the driven

Pressure cylinder 9 by means of a gearbox connection a drive on the applicator roll 20 done. The transmission connection may preferably be Be traction mechanism or a gear transmission. For this purpose, the pressure cylinder 9 leading to the printing material is coupled to the application roller 20 by means of a traction mechanism or gear transmission.

In training as a gear transmission, at least one intermediate gear between see the gear of the printing cylinder 9 and the gear of the applicator roll 20 may be arranged. The at least one intermediate gear is preferably accommodated on the frame in a stationary mounting (not shown). Alternatively, the stationary mounting of the at least one intermediate gear may be the bearing 31 of the linkage 31, 33, 27. Thus, the intermediate gear can be mounted on the stationary bearing 31 together with the rocker 33.

In the case of the drive variant B, there are advantageously no changes in the axial distance between the impression cylinder 9 and the application roller 20, regardless of the position of the blanket cylinder 12. In the gear transmission, the engagement conditions are always constant, there are no tooth flank changes and no changing conditions in the backlash ,

In a further development, both drive variants A and B can be used simultaneously, so that the application roller 20, starting from the main drive 34, can receive input from the blanket cylinder 12 (first drive variant A) and another input from the impression cylinder 9 (second drive variant B). Preferably arranged in the drive train (first and / or second drive variant A, B) a clutch. By means of a clutch, the application roller 20 can be separated from the main drive 34 and then stopped or driven by auxiliary drive, for example, with freewheeling on.

The painting device 17 or the metering device 20, 21 preferably comprises a feed line 24 for the medium, in particular lacquer, flexo ink or cleaning fluid. Integrated into the supply line 24, a feed pump 23 is arranged. The feed pump 23 may preferably be operable in reverse operation (switchable). Furthermore, the metering device 20, 21 comprises a return line 25 for the respective medium. Feed line 24 and return line 25 are connected to at least one reservoir 26 for the respective medium. The return of the medium (return line 25) can be done by gravity or a suction pump in the receptacle. The paint supply (paint circulation system) is preferably coupled to a paint conditioner. Furthermore, the paint circulation system for cleaning the paint-contaminated components can be coupled with an automatic rinsing.

If necessary, the plate cylinder 11 may be driven on the drive side by means of the main drive 34 or a single motor, i. mechanically separated from the main drive 34 and controlled in a predeterminable manner, be coupled.

The metering device 20, 21 is not limited to the above embodiment. Rather, alternatively, the metering device 20, 21 as a the applicator roll 20 containing two-roll mill with a coating medium receiving nip or as the applicator roll 20 containing scoop roller be formed with a dipping into a container with paint medium scoop roller.

The mode of action is as follows:

For painting, the contact of blanket cylinder 12 and plate cylinder 11 required in printing operation is separated in a second gap 19. For example, by pivoting blanket and / or plate cylinder in the bearings. Alternatively, the printing plate (printing plate), if necessary, the pad on the plate cylinder 1, preferably by means of a printing plate changing device, be removed, so that in this way the contact between the blanket cylinder 12 and plate cylinder 11 is separated.

Furthermore, the cleaning device 16 is turned off by the blanket cylinder 12.

By means of the controllable by a machine control actuator 27, the painting device 17 is employed on the blanket cylinder 12. When using a working cylinder as the actuator 27 of this is moved from the position 27.2 (painting device 17) in the position 27.1 (painting 17 employed) moves. In position 27.1, the two curves are 29, 30 in contact and form the mating site. If the blanket cylinder 12 (and thus the first cam member 29) in its position on the portable storage 32 (in position 32 ') changed (pressure-on, pressure-off, Druckbeistellung) so is - when employed painting 17 - always the second curves - Member 30 to the first cam member 29 (or the blanket cylinder) tracked. At least the feed pump 23 of the painting device 17 is driven by a machine control and the metering device 20, 21 is supplied with the respective medium, so that the applicator roller 20, for example, can transfer the paint on the blanket cylinder 12.

If the painting operation (alternatively cleaning operation) is completed, the painting device 17 is turned off by means of the actuating device 27 and the mating point of the two cam members 29, 30 is separated. The drive of the painting device 17 is separated or at least the application roller 20 can be operated in the off state by means of auxiliary drive.

The printing unit can then be switched to printing.

If the painting device 17 as a whole or parts thereof, for example, are not needed for a relatively long time, then they can be removed from the detachable mountings. If necessary, a shelf on a mobile tool trolley or at an intermediate storage space, for example in the area of a catwalk or the boom, take place on the rotary printing press. Service work, such as cleaning work, can also be carried out there.

LIST OF REFERENCE NUMBERS

1 investor

2 feed table

3 first printing unit

4 second printing unit

5 third printing unit

6 fourth printing unit

7 fifth printing unit

8 outriggers

9 impression cylinders

10 transfer cylinders

11 plate cylinder

12 blanket cylinder

13 inking unit

14 dampening unit

15 conveying direction

16 cleaning device

17 painting device

18 first gap

19 second gap

20 applicator roll

21 chambered scraper

22 drying device

23 feed pump

24 supply line

25 return line

26 reservoir

27 actuator

28 recording 29 first cam member (cam segment)

30 second cam member (cam roller)

31 stationary storage

32 portable storage

33 swingarm

34 main drive (with gear train)

35 action line

36 joint

A first drive variant

B second drive variant

Claims

claims

1. substrate-processing rotary printing machine with at least one printing unit, comprising a printing cylinder leading the printing cylinder, a

Blanket cylinder and a plate cylinder and an inking unit associated with the plate cylinder and optionally a dampening unit, further comprising a painting device which can be turned on / off the blanket cylinder, comprising at least one metering device containing a drivable applicator roller, the plate cylinder and the blanket cylinder being separable in a contact zone, characterized in that the blanket cylinder (12) is rotatably accommodated in a position-adjustable mounting (32, 32 ') that a first cam member (29) is fixed to the position-adjustable mounting (32), that the painting apparatus (17) has a second cam member (17). 30) and that both cam members (29, 30) form a curve joint when the painting device (17) is in a mating position.

Second printing material processing rotary printing machine according to claim 1, characterized in that the mating point of the cam joint on one through the respective axis position of blanket cylinder (12) and applicator roll (20) formed line of action (35) is arranged.

3. substrate-processing rotary printing machine according to claim 1, characterized in that the second cam member (30) in a joint (36) on the Lackiervorrich- device (17) is arranged.

4. substrate-processing rotary printing machine according to claim 3, characterized in that the joint (36) is a hinge or a sliding joint.

5. substrate-processing rotary printing machine according to claim 2 and 3, characterized in that the joint (36) on the line of action (35) is arranged.

6. substrate-processing rotary printing machine according to claim 1, characterized in that the first cam member (29) is circular.

7. substrate-processing rotary printing machine according to claim 1, characterized in that the first cam member (29) is a curve segment.

8. substrate-processing rotary printing machine according to claim 1, characterized in that the second cam member (30) is adjustable.

9. substrate-processing rotary printing machine according to claim 1, characterized in that the second cam member (30) is a cam roller.

10. printing material processing rotary printing machine according to claim 1, characterized in that for turning on / off the blanket cylinder (12) the painting device

(17) is technically coupled to a coupling gear (31, 33, 27).

11, printing material processing rotary printing machine according to claim 1 and 10, characterized in that on the coupling mechanism (31, 33, 27), the second cam member (30) is fixed.

12. printing material processing rotary printing machine according to claim 10, characterized in that the coupling mechanism (31, 33, 27) comprises a stationary bearing (31) that on the bearing (31) end a rocker (33) is mounted in a hinge and on another end of the rocker (33) an actuating device (27) is articulated.

13. The printing material processing rotary printing machine according to claim 1, characterized in that from the immediately adjacent pressure cylinder (9) a drive on the applicator roller (20) of the painting device (17) can be fed, wherein the pressure cylinder (9) with a main drive (34) and common Gear train for the printing material leading cylinder (9, 10) is coupled.

14, printing material processing rotary printing machine according to claim 1, characterized in that the rubber blanket cylinder (12) a drive on the applicator roller (20) of the painting device (17) can be fed, wherein the blanket cylinder (12) with a main drive (34) and common gear train for the printing material leading cylinder (9, 10) is coupled.

15. substrate-processing rotary printing machine according to claim 1, characterized in that the application roller (20) of the painting device (17) is coupled to a single drive.

16, printing material processing rotary printing machine according to claim 1 and 13, characterized in that the pressure cylinder (9) by means of a traction mechanism or a gear transmission with the applicator roller (20) is coupled.

17, printing material processing rotary printing machine according to claim 16, characterized in that the toothed gear at least one between the gear of the printing cylinder (9) and the gear of the applicator roll (20) arranged, received in a stationary storage intermediate gear comprises.

18. substrate-processing rotary printing machine according to claim 12 and 17, characterized in that the stationary mounting of the intermediate gear, the bearing (31) of the

Coupling gear (31, 33, 27).