EP1740380B1 - Printing unit pertaining to a multi-colour roller rotary press, and method for operating the same - Google Patents

Abstract

The printing unit includes two groups (04) creating a double print position (05) with printing group cylinders (06, 07) mounted together. The printing and transfer cylinder is of each printing group are coupled in pairs by a gear connection, and our driven in pairs by a separate drive motor. The gear connection is are in a common lubricant chamber. The inking systems (08) have a separate drive motor.

Description

The invention relates to a printing unit of a multicolour web-fed rotary printing press and to methods for its handling according to the preamble of claim 1, 6 or 7.

By the WO 95/24314 A1 Such a printing unit is known, wherein four double printing units are arranged vertically one above the other and in the region of their double pressure point are horizontally movable relative to each other. For this purpose, the printing units of the same web page are each mounted in a common frame, wherein at least one of the frames is horizontally movable.

The EP 12 64 686 A1 discloses a printing unit with vertically stacked double printing units, wherein the printing cylinder in a middle, and the two inking units are each mounted in outer frame parts. These outer frame members are movable horizontally relative to the central frame member to introduce disk handling devices into the gap as needed.

In the EP 11 49 694 A1 is a printing unit with a plurality of vertically stacked bridge-shaped double printing from two each a double printing point forming printing disclosed, the printing cylinder all in a middle frame section and the printing units associated inking are each stored in outer frame sections. The adjacent frame sections are variable relative to each other in the distance are executed.

The invention is based on the object, a printing unit of a To provide a multi-color web-fed rotary printing press and methods for its handling.

The object is achieved by the features of claim 1, 6 or 7.

The achievable with the present invention consist in particular that in a first aspect, despite a compact design high print quality is guaranteed with little effort. This is achieved on the one hand by the fact that the printing cylinder can remain in a fixed, for example preset position, even when the printing unit is opened to one another (reproducibility). Secondly, the quality (doubling) is increased by the fact that a connecting plane of the axes of rotation of the co-operating transfer cylinder forms an angle not equal to 90 °, in particular between 77 and 87 °, with the plane of the web entering the respective double printing unit. Furthermore, by the use of finite, designed as a multi-part blankets blankets a rigid storage of the printing cylinder can be effected in the frame walls (stiffness).

This configuration is supported or possible by a specially adapted drive concept. To avoid reaching over the separation point between the printing unit cylinder and inking drive train each double printing unit is driven by at least one own drive motor rotationally independent of the other double printing units and the associated inking units. Each inking unit receives its own independent drive motor to its rotary drive. Gears in the range of a separable transmission and a transmission of shocks to the pressure point over the drive train, resulting from reversing movements in the inking unit are avoided. The printing cylinder can be driven individually by each independent drive motors in an advantageous embodiment. However, in order to minimize the effort with high quality and variability, are in The here preferred embodiment each cooperating form and transfer cylinder driven in pairs by one of the other pairs independent drive motors. Thus, a printing plate change of each individual printing point is still possible by the drive motor driving the pair, both during printing operation and also during maintenance and possibly during longitudinal registering. In this connection, the frame section accommodating all the printing unit cylinders is also advantageous in relation to a simple construction, since a common lubricant space can be formed here for all drive trains of the printing units.

Of particular advantage in terms of quality and compact design is the formation of the printing or inking as printing or inking of "waterless offset printing", d. H. there is no dampening solution (dampening unit) provided, the colors and the printing forms are selected with appropriate properties.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Show it:

Fig. 1

a printing unit in operating position B;

Fig. 2

a printing unit in maintenance position A;

Fig. 3

a drive configuration in front view;

Fig. 4

two drive configurations in plan view;

Fig. 5

two versions of the inking unit.

A printing machine, z. B. web-fed rotary printing press, in particular a multi-color web-fed rotary printing press, has a printing unit 01, in which a web of material 02, briefly web 02 successively multiple, z. B. here four times, or several tracks at the same time one or more times are printable. The printing unit 01 has a plurality of (in the present case four) vertically stacked double printing units 03 for the two-sided printing in rubber-against-rubber operation. The double printing units 03 are each formed by two printing units 04, which each have a cylinder 06 formed as a transfer cylinder 06 and a forme cylinder 06; 07, z. B. printing cylinder 06; 07, and have an inking 08. In each case between the two transfer cylinders 06 a (double) pressure point 05 is formed in Anstelllage. The above components are only on the top double printing unit 03 of Fig. 1 denotes, wherein the stacked (double) printing units 03; 04, however, essentially - are executed identically - in particular in the embodiment of the relevant features of the invention.

Shaping and transfer cylinder 07; 06 are preferably formed with a bale width of at least four juxtaposed standing print pages in newspaper format, in particular in broadsheet format. Thus, a double-width web 02 side by side printed with four sides, and the forme cylinder 07 are occupied in accordance with four printing forms side by side. Advantageously, the cylinders 06; 07 on a circumference, which essentially corresponds to two consecutively arranged printed pages in the newspaper format.

The printing cylinder 06; 07 of the plurality of (four) stacked double printing units 03 are rotatably mounted in a middle frame or wall portion 11, which in turn is preferably arranged fixed space, ie, for example, on a floor 09 of the printing room, a fixed space carrier 09, a mounting plate 09 or a mounting frame 09 for the printing unit 01. The inking units 08 on both sides of the double printing units 03 are in rack or

Wall sections 12; 13, which in turn are mounted vertically relative to the central frame portion 11 movable relative to the bottom 09 or support 09 or mounting plate 09 or mounting frame 09 (hereinafter carrier 09). For this purpose, the outer frame sections 12; 13 in mutually corresponding bearing elements 14; 16 of the frame portion 12; 13 and the carrier 09 stored. These can be as illustrated as running in rails 16 rollers 14 or as a sliding or rolling body mounted mutually associated linear guide elements 14; 16 to be executed.

Preferably, the wall sections 11; 12; 13 formed in such a way that they are formed in their operating position B on its side facing each other in pairs substantially complementary to each other and collapsed at their dividing lines or lines 17; 18 nevertheless form a substantially closed page front ( Fig. 1 and 2 ). Thus, the largest possible area for receiving the bearings in the corresponding frame section 11 on both the cylinder side and the inking unit side; 12; 13 and meet requirements for noise, personal and / or pollution protection. In order to achieve the most stable possible storage with correspondingly strong cylinder pin, the middle frame portion 11 deviates in the area of in Fig. 1 and 2 Not shown cylinder bearing from a vertical alignment and has corresponding, the bearing receiving protrusions 19. The outer frame sections 12; 13 have corresponding thereto form complementary recesses 21. The recesses 21 and bulges 19 are formed on the bearing assemblies in the inking unit 08 and printing unit 04 in terms of sufficient or even greatest possible strength of the enclosure, ie at least a minimum thickness through the respective frame out.

Fig. 2 shows a maintenance position A on both sides of the pressure points 05, wherein the relative position of the inking units 08 to the printing cylinder 06; 07 by moving the inking units 08 receiving frame sections 12; 13 is effected. It can also only one side turned off (maintenance position A), while the other is in operating position B. The relative positions can in principle also be achieved in another embodiment, by an outer frame portion 12 (13) fixed space, and the middle and the other outer frame portion 11; 13 (12) or even all three frame sections 11; 12; 13 are movably mounted.

3 and 4 show an advantageous drive configuration for the printing cylinder 06; 07 of the printing unit 01, wherein the pins of the forming and transfer cylinder 07; 06 frontally each with gears 22; 23, in particular spur gears 22; 23, rotatably connected and in pairs form a drive connection. The pairwise drive is advantageously carried out by a drive motor 24 via a transmission, in particular a reduction gear, on one of the two cylinders 06; 07, in particular the forme cylinder 07. The drive on the forme cylinder 07 contributes due to the lower travel to the simple and robust design. In the example, the drive via a pinion 26 on the spur gear 22 ( Fig. 4a ). In another embodiment ( Fig. 4b ), in addition to the spur gear 22, a second gear 27 may be rotatably connected to the forme cylinder pin on which the pinion 26 drives. In this embodiment, the drive connection forming spur gears 22; 23 toothed in favor of an axial Relativverschiebbarkeit (side register) and the gear 27 and pinion 26 helically toothed (strength) to be executed. In principle, it is also possible with the aforementioned configurations first to drive the transfer cylinder 06 and from there to the forme cylinder 07 (reference numbers 06 and 07 would then have to be exchanged). In a variant, not shown, for improved damping of the output from the drive motor 24 to one of the cylinder 06; 07 is not a gear connection (pinion) but a traction mechanism (eg belt, especially timing belt with corresponding pulleys) done. If the drive motor 24 is dimensioned sufficiently strong and / or has an auxiliary gear (reduction), the drive motor 24 can also act coaxially on one of the cylinders 06; 07 of the couple are driven.

As in Fig. 4 to recognize, preferably the frame portion 11 together with a cover 28 a the front - and gears 22; 23; (27) or pinion 26 accommodating lubricant space 29. This preferably extends over the four spur gears 22; 23 of a double printing unit 03 in width and over all four double printing units 03 in height. Ie. there is one for the printing cylinder 06; 07 of the printing unit 01 common lubricant space 29.

The double printing units 03 are formed relative to the intended vertical web run such that a connection plane of the axes of rotation of the co-acting transfer cylinder 06 with the plane of the incoming into the respective double printing unit 03 web 02 in Anstell position an angle α not equal to 90 °, in particular between 77 ° and 87 ° forms (exemplary in Fig. 1 ). Preferably, the axes of rotation of the forme cylinder 07 in Anstelllage not in the same plane as that of the transfer cylinder 06, ie the double printing units 03 are not linear, but angled - preferably bridge-shaped - running. The cylinders 06; 07 are stored for this purpose in the frame section 11 accordingly. As in Fig. 4a schematically indicated by double strokes, the pins of the transfer cylinder 06 are mounted in radial bearings 32, which in turn are mounted for the adjustability of the transfer cylinder 06 in eccentric bushes 33. This storage can be a total of z. B. be designed as a three-ring or four-ring bearing 32, 33. In one variant, only one of the transfer cylinder 06 is mounted so adjustable and the other firmly. The storage of the forme cylinder 07 can also be carried out, but only the radial bearings 31 are indicated.

In a preferred embodiment, the printing unit 01 is designed as a printing unit 01 for the dry offset, ie for the water- or damp-free offset printing. The printing unit 01 has no dampening units in this embodiment and is therefore even more compact. In Fig. 1 the inking units 08 are shown symbolically and can be viewed in be executed of various kinds.

In a particularly advantageous in view of the compact design first embodiment, the inking units 08 are designed as short inking units 08 ( Fig. 2 , top right), ie they have an anilox roller 34, which dips into a paint tray 36 where it picks up color and by a squeegee device 37, z. As a doctor blade or a doctor blade, the excess color is stripped off. Ink tray 36 and doctor blade 37 may preferably be designed as a chamber doctor blade 36, 37 as a unit, which receives its color from a color supply via a pump, not shown. Preferably, the anilox roller 34 has one of the printing unit cylinders 06; 07 mechanically independent drive motor 35. The ink is passed through at least one application roller 38, advantageously two ( Fig. 2 ) or even three, removed from the anilox roller 34 and fed to the forme cylinder 07. Since the cups of the anilox roller 34 essentially define the quantity of ink to be picked up, the amount of ink can be either over a relative speed of two rollers or advantageously over the temperature of the ink and / or ink-carrying components (eg at least the anilox roller 34). The anilox roller 34 is in this case by one of the printing cylinders 06; 07 mechanically independent, in particular also of applicator rollers 38 independent own, drive motor 35 rotatably driven. If there is a significant change in the amount of ink, if necessary, the anilox roller 34 must be replaced by another one.

In an embodiment advantageous in terms of variability in the amount of ink, the inking units 08 are shown in FIG Fig. 5a and 5b z. B. executed as roller inking 08. Again, the ink is applied by several (here two) application rollers 38 to the printing forme of the forme cylinder 07. The application rollers 38, however, do not receive the ink through an anilox roller 34, but via a roller train which has at least one iridescent roller 39 with a hard surface, a so-called friction cylinder 39. advantageous is a compactor, which has two hard cylinder friction cylinder 39 and an intermediate intermediate roller 41 soft surface. Of the Form cylinder remote friction cylinder 39 receives the color via a further intermediate roller 41 of a film roller 42 with a hard surface. For the concept of the separable pressure unit 01, it is provided that the two distribution cylinders 39 via a transmission (gear train or traction mechanism) mechanically coupled together and by a common, from the printing cylinders 06; 07 mechanically independent drive motor 43 are rotationally driven (drive train shown in dashed lines). An iridescent axial movement of the two distribution cylinders 39 can be converted in a simple embodiment of the rotational movement of the same via a corresponding gear. However, an embodiment is advantageous, wherein the axial movement is effected by at least one other drive motor, not shown. The intermediate and applicator rollers 41; 38 are preferably driven only by friction. The film roll 42 receives the ink from a ductor roll 44 with which it forms a nip. The ductor roller 44 is rotatably driven by its own drive motor 46. The dosage of the ink on the ductor roller 44 can be done in various ways.

In a simple version ( Fig. 5a ), the ductor roller is designed as a dipping roller 44, which dips into the ink reservoir of a paint trough 47. By selectively controlling the rotational speed of the drive motor 46 (the ductor roller 44), the amount of ink to be transported via the nip to the film roller 42 is set.

In an advantageous variant ( Fig. 5b ) the inking unit 08 is designed as a pumping ink 08 and receives the required amount of ink controlled by a pumping device 48, which allows, by means of one or more pumps selectively apply the amount of ink on the ductor roller 44. Advantageously, the amount of ink to be applied zonal for sections of the ductor roller 44 in the axial direction separately controllable, which is achieved by a plurality of pumps or more individually controllable valves or in particular a combination of both. As a result, different color requirements can be taken into account via a web to be printed. The pump (s) can (may) be designed as a piston pump or as a continuously running gear pump.

As in Fig. 1 . 2 and 5 indicated, the transfer cylinder 06 preferably at its periphery at least one axially extending opening 49, in particular channel opening 49, in which the ends of a representative in Fig. 5b illustrated elevator 51 can be inserted and possibly fastened in an inner channel. The elevator 51 is advantageous as a multi-part blanket 51 having a dimensionally stable support plate (eg metal) and an elastic layer (eg rubber), e.g. B. so-called. Metal blanket 51, executed. Preferably two printing blankets 51 are arranged axially next to each other on the four printing pages wide transfer cylinders 06, which in an advantageous development are offset in the circumferential direction (for example by 180 °). As a result, in contrast to blanket sleeves (sleeves), a change of the elevators 51 is possible without providing an opening and correspondingly releasable radial bearings in the wall section 11. The elevator 51 can conveniently in maintenance position A from the resulting - gap between inking units 08 and printing cylinders 06; 07 are changed. The same applies to access to a web 02 in case of problems during feeding or after a web break.

It is advantageous if the maintenance position A must indeed be taken in the above-mentioned incidents, but not in the routine pressure plate change. As representative in Fig. 1 , shown lower left for all printing 04, all printing units 04 Druckformwechselvorrichtungen 52 and Druckformhandbehungsvorrichtungen 52 are assigned in an advantageous development. These may advantageously have two guides, on one of which the printing forme, in particular printing plate, guided between the inking units 08 through, the form cylinder 07 can be fed and on the other of the abzunehmende printing form from the forme cylinder 07 can be discharged. The guides can also be designed as closed shafts. The printing plate changing devices 52 and their guides / shafts are connected to the outer frame sections 12; 13 connected and are moved when moving the inking units 08 with these together. For the supply and removal of the printing plates expediently, at least one transport means for the printing forme is provided, which has, for example, a drive means (eg motor) and a driven holding means (friction surface, stop, suction foot). For the routine printing form change, therefore, the printing unit 01 does not have to be brought into its maintenance position A, which in turn would result in time and possibly an adjustment of settings and readjustment. The printing cylinder 06; 07, in particular also the pressure point 05 forming transfer cylinder 06 may remain in their relative position to each other.

Preferably, the printing plate handling device 52 is designed so that viewed in the axial direction of the forme cylinder 07 on four sections next to each other, a printing form is manageable. This can be done by correspondingly wide continuous guides or shafts and at least four transport means for the sections, or by four juxtaposed guides / shafts with each associated transport.

The in the Beschreiung to four printed pages wide cylinders 06; 07 and / or printing plate handling devices 52 is accordingly to be used side by side on six printed pages.

LIST OF REFERENCE NUMBERS

01

Printing unit.

02

Material web, train

03

Double printing

04

printing unit

05

Pressure point, double pressure point

06

Transfer cylinder, printing cylinder

07

Cylinder, forme cylinder, printing cylinder

08

Cylinder, inking unit, short inking unit, roller inking unit, pump inking unit

09

Floor, support, mounting plate, mounting frame

10

-

11

Rack section, wall section, middle one

12

Rack section, wall section, outer

13

Rack section, wall section, outer

14

Bearing element, roller, linear guide element

15

-

16

Bearing element, rail, linear guide element

17

Dividing line, joint line

18

Dividing line, joint line

19

bulge

20

-

21

recess

22

Gear, spur gear

23

Gear, spur gear

24

drive motor

25

-

26

pinion

27

gear

28

cover

29

lubricant space

30

-

31

radial bearings

32

radial bearings

33

eccentric

34

anilox roller

35

drive motor

36

paint tray

37

Rekelvorrichtung

38

applicator roll

39

Roller, distribution cylinder

40

-

41

intermediate roll

42

film roller

43

drive motor

44

duct roller

45

-

46

drive motor

47

paint tray

48

pumping device

49

Opening, channel opening

50

-

51

Elevator, blanket, metal blanket

52

Printing form changing devices, printing form handling device

A

maintenance position

B

operating position

α

angle

Claims (27)

1. Printing unit of a multicolour web-fed rotary printing press comprising a plurality of decks (03) arranged vertically one on top of the other and consisting of in each case two printing couples (04) which form a double printing position (05) and the printing couple cylinders (06; 07) of which are all mounted in a middle frame section (11), and inking units (08) coordinated with the printing couples (04) are mounted in each case in outer frame sections (12; 13), the adjacent frame sections (11; 12; 13) being variable relative to one another in distance, characterized in that forme cylinder and transfer cylinder (07; 06) of each printing couple (04) are coupled in pairs via a gear connection (22; 23) and are driven in pairs by a separate drive motor (24), in that the gear connections (22, 23) of all printing couple cylinders (06; 07) of the printing unit (01) are arranged in a common lubricating space (29) formed by the middle frame section (11) and a cover (28), and in that the inking units (08) have, for their rotational drive, on the coordinated outer frame section (12; 13), in each case at least one separate drive motor (35; 43) independent of the printing couple cylinders (06; 07), in that the printing couple cylinders (06; 07) are mounted in each case in radial bearings (31; 32) and in that a separating line or abutment line (17; 18) between the middle and the outer frame section (11; 12; 13) deviates from a vertical alignment in a manner such that, both for the bearing arrangements in the inking unit (08) and the printing couple cylinder (06; 07), in each case a minimum thickness of the enclosure of the radial bearing (31; 32) by the respective frame section (11; 12; 13) is realized with regard to enclosure of the bearing.
2. Printing unit according to Claim 1, characterized in that the middle frame section (11) has, on the end face at the height of the forme cylinder (07), in each case bulges (19) which project from the vertical alignment and form or reinforce the enclosure of the radial bearings (31) of the forme cylinders (07).
3. Printing unit according to Claim 2, characterized in that the outer frame sections (12; 13) have shape-complementary recesses (21) corresponding to the bulges (19).
4. Printing unit according to Claim 1, characterized in that the decks (03) are in the form of bridges, and in that a connecting plane of the axes of rotation of the cooperating transfer cylinders (06) makes an angle (α) between 77° and 87° with the plane of the web (02) running into the respective deck (03) in the thrown-on position.
5. Printing unit according to Claim 1, characterized in that one printing forme handling apparatus (52) is provided per printing couple (04), which in each case are arranged in the corresponding outer frame sections (12; 13) and connected to these.
6. Method for handling a printing unit (01) according to Claim 5, characterized in that a printing forme change is carried out on one of the printing couples (04) by means of the printing forme handling apparatus (52), while the outer frame section (12; 13) having this printing forme handling apparatus (52) and the middle frame section (11) are in operating position (B) relative to one another.
7. Method for handling a printing unit (01) according to Claim 5, characterized in that a packing (51) in the form of a finite blanket (51) is changed on a transfer cylinder (06) of one of the printing couples (04), while the outer frame section (12; 13) coordinated with this printing couple (04) and the middle frame section (11) are in maintenance position (A) relative to one another, i.e. are moved apart.
8. Printing unit according to Claim 1, characterized in that the outer frame sections (12; 13) are mounted in bearing elements (14; 16) corresponding to one another.
9. Printing unit according to Claim 8, characterized in that the bearing elements (14; 16) are in the form of rollers (14) running in rails (16).
10. Printing unit according to Claim 8, characterized in that the bearing elements (14; 16) are in the form of linear guide elements (14; 16) mounted on sliding or roller bodies and coordinated with one another.
11. Printing unit according to Claim 1, characterized in that the driving in pairs is effected by the drive motor (24) via a step-down gear, on one of the two cylinders (06; 07), in particular on the forme cylinder (07).
12. Printing unit according to Claim 1, characterized in that at least one transfer cylinder (06) of the deck (03) is mounted in radial bearings (32) which in turn are mounted in eccentric bushes (33).
13. Printing unit according to Claim 12, characterized in that radial bearing (32) and eccentric bush (33) are collectively in the form of a three-ring bearing (32, 33).
14. Printing unit according to Claim 12, characterized in that radial bearing (32) and eccentric bush (33) are collectively in the form of a four-ring bearing (32, 33).
15. Printing unit according to Claim 1, characterized in that the printing unit (01) is in the form of printing unit (01) for dry offset, i.e. for offset printing without water and without fountain solution.
16. Printing unit according to Claim 1, characterized in that the inking units (08) are in the form of short inking units (08).
17. Printing unit according to Claim 16, characterized in that the short inking unit (08) has an engraved roller (34) which dips into an ink trough (36), picks up ink there and is scraped by a doctor blade apparatus (37).
18. Printing unit according to Claim 17, characterized in that ink trough (36) and doctor blade apparatus (37) are in the form of an ink chamber blade system (36, 37).
19. Printing unit according to Claim 1, characterized in that the inking units (08) are in the form of a roller inking unit (08).
20. Printing unit according to Claim 19, characterized in that the roller inking unit (08) has a plurality of application rollers (38) and at least one changing roller (39).
21. Printing unit according to Claim 1, characterized in that the inking units (08) are in the form of a pumped inking unit (08).
22. Printing unit according to Claim 21, characterized in that the pumped inking unit (08) has a pump apparatus (48) by means of which it obtains the required amount of ink, controlled by means of one or more pumps.
23. Printing unit according to Claim 22, characterized in that the amount of ink to be applied can be controlled separately in the axial direction zone by zone for sections of the duct roller (44).
24. Printing unit according to Claim 23, characterized in that a plurality of pumps or a plurality of individually controllable valves or in particular a combination of the two is provided for the zone-by-zone control.
25. Printing unit according to Claim 24, characterized in that the pump is in the form of a piston pump.
26. Printing unit according to Claim 24, characterized in that the pump is in the form of a continuously operating gear pump.
27. Printing unit according to Claim 1, characterized in that a packing (51) on the transfer cylinder (06) is in the form of a multipart blanket (51) having a dimensionally stable support plate and a resilient layer, e.g. metal blanket (51).

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