Method for operating a printing press comprising several printing units in succession in the substrate path and a printing press with several printing units arranged in succession in the substrate path

Abstract

Method for operating a printing press comprising several printing units (05; 06) in succession in the substrate path, wherein the printing units (05; 06) each comprise a form cylinder (32) and an inking unit (42) inking the form cylinder (32) during operation, with a lifter roller (47) moving back and forth between an ink pickup roller (44) and a first inking unit roller (46) during production operation, and wherein the form cylinders (32) of at least two printing units (05; 06) are each mechanically rotated independently of one another by a drive motor (60; 61) during production operation or at least during setup operation, wherein in the at least two printing units (05; 06) with independently driveable form cylinders (32), a cam disk (62) of a cam drive (62, 63, 64) moving the lifter roller (47) back and forth is driven by a drive connection (66, 67) from the form cylinder (32) during production operation or at least during setup operation. drive motor in setup operation (60;61) is driven rotaryally, characterized in that the mold cylinders (32), which are driven mechanically independently of each other by the drive motors (60; 61), are brought into a relative position to each other in a register-compliant position with respect to the circumferential position prior to or at the beginning of a production start-up, and that the mechanically independent drive of the mold cylinders (32) is carried out in operation by drive motors (61) designed as individual drives (61), and in order to establish the register-compliant relative position, the individual drives (61) are synchronized to a guide axis position specified by an electronic guide axis.

Description

[0001] The invention relates to a method for operating a printing press comprising several printing units in succession in the substrate path and a printing press with several printing units arranged in succession in the substrate path according to the preamble of claim 1 or 5.

[0002] DE 10 2013 209 698 A1 discloses a sheet-fed printing machine with several printing units arranged in succession, wherein the form cylinders are each driven by an individual drive.

[0003] DE 10 2016 209 967 B3 discloses a sheet-fed printing press with a lifter inking unit, wherein in one embodiment a cam disk moving the lifter roller is driven by a specially provided ink lifter cam drive and in another embodiment by a positively driven friction cylinder. In a process step, the ink lifter cam disk is rotated by the ink lifter cam drive to a detent position of the ink lifter cam disk in order to lock any adjustment of the ink lifter. In this position, the ink lifter is preferably engaged against the first friction cylinder.

[0004] DE 10 2016 205 346 A1 discloses a drive arrangement for an inking unit of a printing unit of a sheet-fed converting machine, which can be driven by an inking unit drive with an electric motor. In a drive situation, this drive can also, via corresponding coupling states, drive another inking unit roller, a cam disc that causes the pivoting movement of a lifting roller, and – while a coupling to a main drive of the sheet-fed converting machine is interrupted – a form cylinder of the printing unit.

[0005] In DE 10 2010 051 031 A1, a lifting roller of an inking unit is pivoted by a separate electric motor by driving a shaft that carries control cams and by means of which levers supporting the roller are pivoted. The pivoting can be periodically interrupted by a pivotable bar in a position in which the lifting roller rests against a downstream friction roller.

[0006] DE 40 12 292 A1 relates to a lifting gear unit, wherein the lifting movement is effected via a Maltese cross cam gear unit from a single-turn drive shaft, e.g. from the plate cylinder.

[0007] The invention is based on the objective of creating a method for operating a printing press comprising several printing units in succession in the substrate path and a printing press with several printing units arranged in succession in the substrate path.

[0008] The problem is solved according to the invention by the features of claim 1 or 5.

[0009] The advantages achievable with the invention consist in particular in the fact that a malfunction of a possibly provided mechanical locking pawl, for example by a drop in overpressure applied to a pneumatically actuated locking element, remains without consequences and / or a mechanical locking pawl can be omitted and / or rotation of possibly positively driven ink rollers can take place independently of the oscillation of the lifting roller.

[0010] A particular advantage of a forced gap between the ink pickup roller and the lift roller during standstill is that partial inking of the lift roller and any subsequent adhesion to the ink pickup roller can be avoided. An otherwise necessary additional washing process is thus eliminated.

[0011] Another advantage achievable with the invention, in the case of individual drives, is, for example, the variability in the configuration of printing presses and / or the simple possibility of correcting circumferential registers and / or unwinding errors.

[0012] In a printing press comprising several printing units in succession along the substrate path, each printing unit comprising a form cylinder and an inking unit that inks the form cylinder during operation, with a lifter roller that moves back and forth between an ink pickup roller and a first inking unit roller during production, the form cylinders of at least two, preferably all, printing units are mechanically rotated independently of one another by a drive motor during production or at least during setup. In a preferred embodiment, in the at least two printing units with independently driven form cylinders, a cam disk of a cam drive that moves the lifter roller back and forth is rotaryally driven via a drive connection by the drive motor that drives the form cylinder during production and / or at least during setup.

[0013] A particularly advantageous operation is such that, before one or each of the printing units with independently driven form cylinders is stopped, the cam disc is moved into a locking position by the drive motor that drives the respective form cylinder in production operation or at least in setup operation, in which it creates a gap between the lift roller and the ink intake roller and blocks any movement of the lift roller towards the outer surface of the ink intake roller, and in which it remains for at least a period of time when the printing unit is stopped.

[0014] A printing press, particularly suitable for this purpose, comprises several printing units arranged one behind the other in the substrate path, wherein the printing units each have a form cylinder and an inking unit inking the form cylinder during operation with a lifting roller that can be moved back and forth between an ink intake roller and a first inking unit roller during production operation, and wherein the form cylinders of at least two, preferably all, printing units can be mechanically rotated independently of each other by a drive motor during production operation or at least during setup operation.Preferably, in at least two, preferably all, printing units with independently driven form cylinders, a cam disk of a cam drive is provided which moves the lifting roller back and forth in production operation, and which can be driven rotaryally via a drive connection by the drive motor which drives the form cylinder in production operation and / or at least in setup operation.

[0015] In a particularly advantageous embodiment, the drive motors that mechanically drive the respective mold cylinders independently of one another in production operation or at least in setup operation are connected to a control means comprising a control routine, which are configured to operate the respective drive motors mechanically independently of one another in such a way that, after the control routine has been completed, the cam discs driven by the drive motors are each in a predetermined locking position, in which they create a distance between the lifting roller and the ink intake roller and block movement of the lifting roller towards the outer surface of the ink intake roller.

[0016] Exemplary embodiments of the invention are shown in the drawings and are described in more detail below.

[0017] They show: Fig. 1 a schematic representation of a sheet processing machine in a preferred embodiment; Fig. 2 a schematic representation of a superstructure module of a printing unit in a preferred embodiment; Fig. 3 a detailed representation of a section of a lift inking unit according to Fig. 2.

[0018] A machine processing a sheet-shaped substrate B, e.g., a printing press, in particular a sheet-processing machine, comprises a substrate feeder 01, for example, designated as a sheet feeder 01, a feed unit 03, for example, designated as a sheet feeder 03, and a substrate delivery unit 08, for example, designated as a sheet delivery unit 08. Between the substrate feeder 01 and the substrate delivery unit 08, one or more processing stages 05, 06, 07, also designated as units 05, 06, 07, are arranged, which are designed, for example, as a printing unit 05, 06, coating unit 07, drying unit, calendering unit, or foil transfer unit, or in another suitable manner.In the case of the sheet-fed processing machine being configured as a printing press, in particular a sheet-fed printing press, at least one of the units 05; 06 is formed by a printing unit 05; 06, in particular an offset printing unit 05; 06, to which preferably one or more units 07, in particular coating units 07, are subordinate. In the case of several printing units 05; 06, the arrangement of one or more coating units 07 between the printing units 05; 06 may also be provided.

[0019] Unless explicitly stated otherwise, the term "sheet B" refers to any substrate B that is flat and exists in sections, including substrates B that are in sheet or plate form. The sheet B defined here is preferably made of paper or cardboard, but can also be made of sheets, plates, or other materials made of plastic, cardboard, glass, or metal.

[0020] The individual components of a sheet processing machine on a sheet-fed printing press are described in more detail below.

[0021] For example, in Fig. Figure 1 shows a substrate feeder 01 designed as a sheet feeder 01, with a conveyor section 02 designed, for example, as a belt table 02, and with a substrate container 09 formed, for example, by a stack of sheets 09, which is arranged on a receiving device 10, e.g., a stacking plate 10. The stacking plate 10 is connected to transport means which ensure that the top of the sheet stack 09 is held in a defined position.

[0022] The figures show the structure of a printing substructure 31, a substructure 31 designed as a substructure module 31 of the works 05; 06, here printing works 05; 06.

[0023] Of the printing units 05; 06, only the printing unit cylinders 34; 36, for example, the printing cylinders 34; 36, and the printing unit cylinders 33 that transfer the printed image, for example, transfer cylinders 33, are shown. These, together with the printing cylinders 34; 36, also referred to as impression cylinders 34; 36, form printing zones 55, also referred to as printing points 55 or printing gaps 55. The transfer cylinders 33 are also referred to as rubber cylinders 33 or rubber blanket cylinders 33. The printing cylinders 34; 36 have a continuous cylinder shell surface, except for at least one axially extending cylinder channel 56. A gripper system 57 for taking up and transferring the sheet B in the gripper closure is preferably arranged in the cylinder channel 56. Double-sized printing cylinders 34; 36 therefore have two gripper systems 57, each arranged in a separate cylinder channel 56.Between the printing cylinders 34 and 36, a transfer drum 35, typically designed as a transfer drum 35, is arranged with curved sheet support elements 58, e.g., so-called drum caps 58, arranged concentrically to the axis of rotation. Alternatively, the transfer drum 35 can also be designed without drum caps 58 as a so-called transferter 35. For taking the sheets B from the upstream printing cylinder 34 and transferring them to the downstream printing cylinder 36, the transfer drums 35 preferably have gripper systems 59. During sheet transport on the drum caps 58 of the transfer drum 35, the sheets B can be supported, in particular, by an air cushion guide arranged under the transfer drum 35 and thus laid smoothly onto the drum caps 58.The transfer drums 35 arranged between the printing cylinders 34, for example transfer drums 35 or transferters 35, can be single-sized or multi-sized, but are preferably double-sized. Single-sized cylinders can accommodate one sheet B and double-sized cylinders can accommodate two sheets B circumferentially.

[0024] Each printing unit 05; 06 comprises, for example, in the area of ​​a so-called printing unit superstructure 30 designed as a superstructure module 30, a printing unit cylinder 32 designed in particular as a form cylinder 32, e.g. as a plate cylinder 32, and in an embodiment for the offset printing process also a printing unit cylinder 33 designed in particular as a transfer cylinder 33, e.g. as a rubber cylinder 33. Furthermore, the printing unit 05; 06 comprises, for example, in the area of ​​a so-called printing unit substructure 31, a printing unit cylinder 34 designed as a printing cylinder 34 or impression cylinder 34 and a transfer drum 35 also referred to as a transfer drum 35.

[0025] The printing units 05; 06, as can be seen, for example, in the schematically depicted structure of the printing units 05; 06 in the figures, are preferably modular in design, such that the upper printing unit structure 30 is formed by a first module 30, e.g., a so-called upper unit module 30, and the lower printing unit structure 31 by a second module 31, e.g., a so-called lower unit module 31. In the modular design, the upper unit module 30 comprises, for example, the printing cylinder 32 and, in an embodiment for offset printing, also the transfer cylinder 33. The lower unit module 31 includes, in particular, the printing cylinder 34 and, for example, the transfer drum 35. In this context, "modular" or "module" can be understood as a unit which, with its main components or at least their connecting elements, is pre-assembled in a frame and can be inserted into the machine as a whole, if necessary.to be disassembled again, with the frame being designed as a frame that can be detached from the rest of the machine frame.

[0026] In the case of the modular design, the horizontal division between the upper module 30 and the lower module 31 preferably runs between the rubber cylinder 33 and the printing cylinder 34; 36. The vertical dividing line between the lower modules 31 or between the printing units 05; 06, viewed in the sheet transport direction, is predominantly placed between the transfer drum 35 of the printing unit 05 and the printing cylinder 36 of the subsequent printing unit 06.

[0027] The transmission cylinder 33 mentioned above, e.g. designed as a rubber cylinder 33, can have at least one fastening device with a fastening element 38 for holding and / or tensioning a rubber sheet. For example, a channel 37, designated as a clamping and / or tensioning channel 37, can be provided in which the fastening elements 38, designed as clamping and / or tensioning elements 38, are arranged, in particular for tensioning a rubber sheet.

[0028] The rubber cylinder 33 is preceded, with respect to the direction of the effective ink flow, by the form cylinder 32, which is designed, for example, as a plate cylinder 32 and which also has, for example, at least one fastening device with a fastening element 40 for holding and / or clamping a printing form. The plate cylinder 32 can have a channel 39, also referred to as a clamping and / or clamping channel 39, in which, for example, at least one fastening element 40, designed as a clamping and / or clamping device 40, is located for clamping a printing form onto the outer surface of the plate cylinder 32.

[0029] The printing unit 05; 06 can be assigned an automatic or semi-automatic plate changing device 41 in the area of ​​the printing unit superstructure 30 or superstructure module 30.

[0030] At least one inking unit 42 is provided for inking the printing form, e.g., a printing plate. The inking unit 42 of at least one, preferably several or all of the printing units 05; 06 is designed as a lift inking unit 42. In the case of the preferred design as a lift inking unit 42, the inking unit 42 comprises at least one ink reservoir 43, which may be designed, for example, as a doctor blade or ink box 43, at least one ink intake roller 44 to be inked by the ink reservoir 43, designed, for example, as a ductor roller or, preferably, as an ink box roller 44, one or more further inking unit rollers 45, and preferably a lift roller 47, e.g., a so-called ink lifter 47, which oscillates between the ink intake roller 44 designed as an ink box roller 44 and a first inking unit roller 46. The inking unit rollers 45 differ, for example, in positively driven ink friction rollers 46; 48 and in inking rollers 49, e.g. the e.g.The ink rollers 48 are driven solely by friction. In the exemplary embodiment, four ink application rollers 50 are preferably provided to apply the ink, in particular printing ink, prepared by the inking rollers 45, to the printing plate.

[0031] In the direction of rotation 53 of the plate cylinder 32, which is present during operation, a dampening roller 52 is optionally arranged upstream of the inking rollers 50. This dampening roller receives the dampening solution, for example, from a dampening metering roller 65 immersed in a dampening solution reservoir. The dampening roller 52 is associated with a dampening unit 51, which is designed to apply dampening solution to the surface of the printing plate. A preferably switchable bridge roller 54 can be provided between an inking roller 50, which is the first inking roller 50 in the direction of rotation 53 of the plate cylinder 32, and the dampening roller 52. This functionally enables a connection between the dampening unit 51 and the inking unit 42. In the case of the switchable design, this allows for several operating modes to optimize the dampening solution supply.

[0032] The last printing unit 06 is followed, for example, by a coating unit 07.

[0033] The sheet-fed printing press is available in one version, e.g., one that is in Fig. 1. A first drive motor 28, shown schematically, is assigned to each plate cylinder 32. In addition to or instead of this, each plate cylinder 32 is provided with a drive motor 60; 61 that drives the respective plate cylinder 32, at least in a setup operation, directly or indirectly, mechanically independent of the first drive motor 28 (if applicable) and / or of other plate cylinders 32 (see, e.g., schematically in [reference]). Fig. 1 and Fig. 2 indicated).

[0034] In a first embodiment, this at least one first drive motor 28 is designed, for example, as a main motor 28, in particular as a main drive 28, and drives, for example, a wheel train that forms a drive unit. In the coupled state or during production operation, the drive unit comprises, in particular, the printing cylinders 34; 36, the transfer drums 35, the rubber cylinders 33, the plate cylinders 32, the optionally provided coating unit 07, and the inking units 42. In this first embodiment, each printing unit 05; 06 is provided with a drive motor 60 acting as an auxiliary drive 60, which can act directly on the plate cylinder 32 or on a drive unit that drives the plate cylinder 32 and the rubber cylinder 33, and through which, when the coupling to the drive unit comprising the printing cylinders 34; 36 and the transfer drums 35 is disengaged, the plate cylinder 32, optionally the coating unit 07, is driven.together with the transfer cylinder 33 and / or the inking unit 42, it can be driven rotaryally, mechanically independently of the associated printing cylinder 34; 36, and in particular of the rest of the drive assembly. Such an auxiliary drive 60 can preferably be decoupled from the main drive 28 and used, for example, for positioning individual cylinders, in particular the form or plate cylinder 32.

[0035] Individual functional units of the sheet-fed printing press, such as the substrate feeder 01, especially the sheet feeder 01, the ink pickup roller 44 and / or any dampening units 51 provided, can preferably be driven by separate drives, in particular individual drives, i.e. without a mechanical and / or positive drive connection to drives of the other functional units and a drive assembly comprising the main motor 28.

[0036] In an embodiment that advantageously further develops the first embodiment, the additional drive motors 61 that drive the plate cylinders 32, at least during setup, are designed as separate drives 61, in particular individual drives 61, which drive the plate cylinders 32, optionally together with the respective transfer cylinder 33 and / or the inking units 42, mechanically independently of the associated printing cylinders 34; 36, in particular of the aforementioned remaining drive assembly, and / or independently of one or more plate cylinders 32 of one or more further printing units 05; 06 comprised of the printing press, even during production operation. In this respect, at least the plate cylinders 32 are separated from the aforementioned drive assembly and driven solely by the separate drives 61, in particular individual drives 61, which are assigned only to the respective plate cylinder 32, optionally in conjunction with the associated transfer cylinder 33 and / or inking unit 42.without a mechanical and / or positive drive connection to the respective associated printing cylinder 34; 36 and / or to drives of the other plate cylinder(s) 32, and / or to a drive assembly comprising the main motor 28 and optionally to drives of other functional units such as the substrate feed device 01, the ink rollers 44 and / or the dampening units 51, the plate cylinder(s) 32 are moved rotaryally. The separate drives 61 or individual drives 61 of the plate cylinder(s) 32 can in particular be formed by so-called direct drives, whereby a direct drive is understood to be a drive 61 or individual drive 61 in which the drive motor 61 or its rotor, preferably without intermediate gear elements, is connected directly or optionally via a coupling in a coaxial arrangement to the drive shaft, in particular the journal, of the plate cylinder 32.The drive motor 61 is preferably designed such that the interposition of a gearbox can be dispensed with. The peripheral speed of the plate cylinders 32 is adapted to the peripheral speed of the cylinders interacting with the plate cylinders 32. According to another embodiment, several of the units 05; 06; 07, preferably each of the units 05; 06; 07, have their own drive motor 61 driving the drive assembly of the respective unit 05; 06; 07, but without being coupled to drives of other units 05; 06; 07 via a mechanical and / or positive drive connection. In this case, for example, the aforementioned main drive 28 can be omitted.

[0037] For example, paint shop 07 also has at least one of its own drives. Such a drive could be, for example, a direct drive and / or an auxiliary drive.

[0038] The sheets B are provided in the printing unit 09, which is designed, for example, as a sheet stack 09. The grippers, e.g., of the swing gripper 04, transfer the sheet B to grippers of a feed drum 29, through which the sheet B is transferred to the gripper system 57 of the printing cylinder 34 of the first printing unit 05.

[0039] Sheet B, now located on printing cylinder 34, is inked by the inking unit 42 via the form cylinder 32 and, in the case of offset printing, via the transfer cylinder 33. This occurs, for example, as follows: The ink stored in the ink reservoir 43, e.g., in the ink box 43, is metered zone by zone onto the ink pickup roller 44, e.g., the ink box roller 44. It is then preferably deposited as a strip of ink by the periodically moving ink lifter 47 onto the first inking roller 46, e.g., the ink friction roller 48. This roller transfers the ink via friction-driven inking rollers 49 to the friction rollers 48. The ink is then transferred via further inking rollers 45 to the ink application rollers 50 and thus onto the printing plate mounted on the cylinder 32. Viewed in the direction of rotation 53 of the cylinder 32, dampening fluid can be applied by the dampening roller 52 before the ink is applied by the ink application rollers 50.

[0040] The ink placed on the printing form is transferred to the rubber cylinder 33 in accordance with the motif and from there to the sheet B guided by the printing cylinder 34.

[0041] Sheet B is now transferred from the first printing unit 05 to the following printing unit 06 and, if necessary, subsequent printing units. This is done, for example, as follows: Sheet B is transferred from the gripper system 57 of the printing cylinder 34 to the gripper system 59 of the transfer drum 35 and thus guided through the entire sheet-fed printing press. In the individual printing units 05 and 06, the ink is then applied to sheet B via the respective transfer cylinders 33.

[0042] After the sheet B has passed through the printing units 05 and 06, it can be coated with a layer of varnish in one or more coating units 07. The sheets B, gripped at the leading edge, are transported by gripper carriages to the delivery unit 08 and deposited there.

[0043] The printing units 05; 06, each comprising an auxiliary or individual drive 60; 61, each have a form cylinder 32 and an inking unit 42 that inks the form cylinder 32 during operation, with a lifter roller 47 that can be moved back and forth between an ink pickup roller 44 and a first inking unit roller 46 during production operation. The form cylinders 32 of at least two printing units 05; 06 are thus mechanically rotatable independently of one another by a drive motor 60; 61 during production operation or at least during setup operation – e.g., for a printing form change, a washing process, or erasing or rewriting a cylinder-fixed printing form.

[0044] In the at least two printing units 05; 06 with independently driven forming cylinders 32, a cam drive 62, 63, 64 is provided with a cam disk 62 and a roller lever 63 carrying a roller 64, by which the lifting roller 47 can be moved back and forth during production operation. The cam disk 62 can be driven rotaryally via a mechanical drive connection 66, 67, advantageously a belt drive 66, 67, for example via a drive wheel 66 mechanically coupled to the drive of the forming cylinder 32, in particular a belt pulley 66, and an endless traction element 67, in particular a belt 67, from the drive motor 60; 61 that drives the forming cylinder 32 during production operation or at least during setup operation. Alternatively, the drive connection can be implemented via a gear drive only.In any case, the drive connection 66, 67 can be made directly from a drive wheel 66 or gear which is non-rotatably connected to the mold cylinder 32, or indirectly from the relevant drive motor 60; 61 or from the mold cylinder 32.

[0045] The cam disk 62 can be single-turn, i.e., with only one highest point 68 with a largest radius and one lowest point 69 with a smallest radius, or it can be multi-turn. The roller lever 63 is pivotable about a pivot axis S, e.g., parallel to the axis of rotation of the ink-receiving roller 44, and carries, e.g., the roller 64 on one of its lever arms and, offset on the same lever arm, or on another lever arm, the lifter roller 47. The cam disk 62 and the roller lever 63, which carries the roller 64 and the lifter roller 47, are designed and arranged relative to the lifter roller 47 and ink-receiving roller 44 such that the lifter roller 47 is in contact with the first inking roller 46 when the roller 64 passes through a point 68; 69 of one limit radius, e.g., the largest radius, and when the roller 64 passes through a point 68; 69 of the other limit radius, e.g. the smaller radius, is in contact with the ink receiving roller 44.

[0046] It can be advantageous if the roller lever 63 is subjected to a force by a preloading device 71, 72, 73, e.g. a plunger 73 pressed by a spring 71 against a lever arm 72 of the roller lever 63, so that the roller 64 is pressed securely against the cam track of the cam disk 62 in every phase.

[0047] Additionally, a mechanical locking device 74, 76, e.g., a pneumatically actuated actuator 74 with a plunger 76, can be provided, by which the pivoting movement of the roller lever 64 can be limited, in particular to prevent the lifting roller 47 from pivoting against the ink receiving roller 44. Such a locking device 74, 76 can be provided in addition to the solution described below for locking the roller contact to expand the possible operating states, e.g., a locked contact when the forming cylinder 32 is rotating, or it can be omitted for reasons of space or cost.

[0048] When operating such a printing press, the form cylinders 32 of at least two printing units 05; 06 are each mechanically rotated independently of one another by a drive motor 60; 61 in production operation or at least in setup operation, wherein the cam disk 62 of the cam drive 62, 63, 64 which moves the lifting roller 47 back and forth is driven rotaryally by the drive motor 60; 61 which drives the form cylinders 32 in production operation or at least in setup operation via the drive connection 66, 67, e.g. a traction drive 66, 67.

[0049] Preferably, before one or each of the printing units 05; 06 with independently driven form cylinders 32 is stopped, the cam disk 62 is moved into a locking position by the drive motor 60; 61 which drives the respective form cylinder 32 in production operation or at least in setup operation, in which it creates a gap, e.g. a gap of at least 0.5 mm, between the lifter roller 47 and the ink receiving roller 44 and blocks movement of the lifter roller 47 towards the outer surface of the ink receiving roller 44, and in which it remains for at least a period of time, preferably until the start-up procedures for a successful production start-up, when the printing unit 05; 06 is stopped.

[0050] For this purpose, the drive motors 60; 61, which mechanically drive the respective forming cylinders 32 independently of one another in production operation or at least in setup operation, are connected to a control system comprising a control routine. This control system is configured to operate the respective drive motors 60; 61 mechanically independently of one another in such a way that, after the control routine has been executed, the cam discs 62 driven by the drive motors 60; 61 are each in a predetermined locking position. In this position, they create a gap between the lift roller 47 and the ink pickup roller 44 and block any movement of the lift roller 47 towards the outer surface of the ink pickup roller 44. The control routine can be provided in circuits of a control unit assigned to the respective printing unit 05; 06, either individually or jointly, e.g., a PLC (Programmable Logic Controller).

[0051] A preferred locking position is approached and assumed in which the lifting roller 47 is pressed against the first inking roller 46 by the cam mechanism 62, 63, 64.

[0052] At least the first inking roller 46 designed as an inking friction roller 46 is preferably positively driven and / or mechanically rotatable independently of the pendulum movement of the lifting roller 47.

[0053] Prior to or at the start of production, the form cylinders 32, which are driven independently of each other by the drive motors 60 and 61, are moved into a relative position corresponding to the circumferential position and register. Depending on the substrate path length between the printing units 05 and 06, these angular positions can vary.

[0054] In an advantageous embodiment – ​​e.g., with regard to variability and / or modularity – the mechanically independently driven forming cylinders 32 are driven during operation by drive motors 61 designed as individual drives 61. In this case, to achieve the register-compliant relative position, the individual drives 61 are synchronized to a guide axis position specified by an electronic guide axis. In this case, the individual drives 61 are in signal communication with the electronic guide axis, which synchronizes the position and movement of the individual drives 61 during production. The guide axis position to be synchronized can be stationary or can advance over time, thus specifying a rotation.

[0055] In the advantageous case – e.g., with regard to control complexity and / or robustness – where the form cylinders 32 are driven by auxiliary drive motors 60 in mechanically independent operation, the auxiliary drive motors 60 engage a mechanical drive system that drives the printing cylinders 32, 33, 34 of several printing units 05, 06 after the defined register-correct relative position has been established by the auxiliary drive motors 60 – which can be determined, for example, by a provided sensor system. The latter can be driven by a main motor 28. The auxiliary drive motors 60 can continue to run – e.g., without power – or be disengaged. Reference symbol list 01 Substrate feeder, arc feeder 02 Conveyor section, belt table 03 Plant setup, arch system 04 Swing gripper 05 Work. Processing stage, printing unit, offset printing unit 06 Work, processing stage, printing unit, offset printing unit 07 Plant, processing stage, paint plant 08 Substrate dispensing device, sheet delivery 09 Packaging of printing material, stacks of sheets 10. Receiving device, stacking plate 28 Drive motor, main motor, main drive 29 Attachment drum 30 Printing mechanism superstructure, superstructure module, superstructure, module, first 31 Printing mechanism substructure, substructure module, substructure, module, second 32 printing cylinders, form cylinders, plate cylinders 33 printing cylinders, transfer cylinders, rubber cylinders, blanket cylinders 34 printing cylinders, printing cylinders, counter-pressure cylinders 35 Transfer drum, transfer drum, transferter 36 printing cylinders, printing cylinders, counter-pressure cylinders 37 Channel, clamping and / or clamping channel 38 Fasteners, clamping and / or tensioning devices 39 Channel, clamping and / or clamping channel 40 Fasteners, clamping and / or clamping devices 41 Plate changing device 42 inking unit, lift inking unit 43 paint supplies, paint box 44 Ink roller, ductor roller, ink pickup roller 45 inking roller 46 Inking roller, first, inking friction roller, positively driven 47 Lifting roller, paint lifter 48 Paint rubbing roller, forced drive 49 inking roller, driven by friction 50 ink application roller 51 Humidification system 52 Dampening roller 53 Direction of rotation (32) 54 Bridge roller 55 Pressure zone, pressure point, pressure gap 56 cylinder ports 57 Gripper system (34; 36) 58 arch support element, drum cap 59 Gripper system (35) 60 Drive motor, auxiliary drive 61 Drive motor, drive, single drive 62 Cam disc 63 roller levers 64 rolls 65 Moisture metering roller 66 Drive wheel, belt pulley 67 Traction devices, belts 68th place (highest) 69th place (lowest) 70 - 71 spring 72 Lever arm 73 pestles 74 Actuator 75 - 76 pestles B Substrate, arc-shaped, printing material, sheet S swivel axis

Claims

[1] Method for operating a printing press comprising several printing units (05; 06) in succession in the substrate path, wherein the printing units (05; 06) each comprise a form cylinder (32) and an inking unit (42) inking the form cylinder (32) during operation, with a lift roller (47) moving back and forth between an ink pickup roller (44) and a first inking unit roller (46) during production operation, and wherein the form cylinders (32) of at least two printing units (05; 06) are each mechanically rotated independently of one another by a drive motor (60; 61) during production operation or at least during setup operation, wherein in the at least two printing units (05; 06) with independently driveable form cylinders (32), a cam disk (62) of a cam drive (62, 63, 64) moving the lift roller (47) back and forth is connected to the form cylinder (32) via a drive connection (66, 67) Production plant or at least drive motor in setup operation (60;61) is rotary driven, ; characterized by , that the mold cylinders (32), which are driven mechanically independently of each other by the drive motors (60; 61), are brought into a relative position to each other in a register-compliant position with respect to the circumferential position in advance or at the beginning of a production start-up, and that the mechanically independent drive of the mold cylinders (32) is carried out in operation by drive motors (61) designed as individual drives (61) and that, in order to produce the register-compliant relative position, the individual drives (61) are synchronized to a guide axis position specified by an electronic guide axis. [2] Method according to claim 1, characterized by, that before one or each of the printing units (05; 06) with independently driven form cylinders (32) is stopped, the cam disk (62) is moved into a blocking position by the drive motor (60; 61) which drives the respective form cylinder (32) in production operation, in which it creates a gap between the lift roller (47) and the ink intake roller (44) and blocks movement of the lift roller (47) towards the outer surface of the ink intake roller (44), and in which it remains for at least a period of time when the printing unit (05; 06) is stopped. [3] Method according to claim 2, characterized by , that a position is approached and assumed as a blocking position in which the lifting roller (47) is applied to the first inking roller (46) by the cam mechanism (62, 63, 64). [4] Method according to claim 1, 2 or 3, characterized by, that the cam disk (62) is rotated via a traction gear directly or indirectly by the drive motor (60; 61) which drives the forming cylinder (32) in production operation. [5] Printing press with several printing units (05; 06) arranged one behind the other in the substrate path, wherein the printing units (05; 06) each comprise a form cylinder (32) and an inking unit (42) inking the form cylinder (32) during operation, with a lifter roller (47) movable back and forth between an ink pickup roller (44) and a first inking unit roller (46) during production operation, and wherein the form cylinders (32) of at least two printing units (05; 06) can each be mechanically rotated independently of one another by a drive motor (60; 61) during production operation or at least during setup operation, characterized by, that in the at least two printing units (05; 06) with independently driven form cylinders (32) a cam disk (62) of a cam drive (62, 63, 64) is provided which moves the lifting roller (47) back and forth in production operation, which can be rotaryally driven via a drive connection (66, 67) by the drive motor (60; 61) which drives the form cylinder (32) in production operation or at least in setup operation, characterized by , that the drive motors (61) which drive the mechanically independent forming cylinders (32) are designed as individual drives (61) which are in signal connection with an electronic guide axis which synchronizes the position and movement of the individual drives in production operation. [6] Printing press according to claim 5, characterized by, that the drive motors (60; 61) which drive the respective forming cylinders (32) mechanically independently of each other in production operation or at least in setup operation are in signal connection to control means comprising a control routine which are configured to operate the respective drive motors (60; 61) mechanically independently of each other in such a way that, after the control routine has been completed, the cam discs (62) driven by the drive motors (60; 61) are each in a predetermined locking position, in which they create a distance between the lifting roller (47) and the ink receiving roller (44) and block movement of the lifting roller (47) towards the outer surface of the ink receiving roller (44).

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