EP1740380A1

EP1740380A1 - Printing unit pertaining to a multi-colour roller rotary press, and method for operating the same

Info

Publication number: EP1740380A1
Application number: EP04741487A
Authority: EP
Inventors: Thomas Heinrich Hoffmann; Jürgen Alfred STIEL
Original assignee: Koenig and Bauer AG
Current assignee: Koenig and Bauer AG
Priority date: 2004-04-28
Filing date: 2004-04-28
Publication date: 2007-01-10
Anticipated expiration: 2024-04-28
Also published as: EP1740380B1; DE502004010090D1; WO2005115756A1; EP1767356A2; US20080000366A1; EP1767356A3; US7735418B2; ATE442958T1

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

description

Printing unit of a multi-color web-fed rotary printing press and method for handling it

The invention relates to a printing unit of a multi-color web-fed rotary printing press and to methods for handling it according to the preamble of claim 1, 3, 7 or 9 or 10 or 11.

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

EP 12 64 686 A1 discloses a printing unit with double printing units arranged vertically one above the other, the printing unit cylinders being mounted in a central part and the two inking units each being mounted in outer frame parts. These outer frame parts can be moved horizontally relative to the central frame part in order to introduce plate handling devices into the intermediate space if necessary.

EP 1 49 694 A1 discloses a printing unit with a plurality of bridge-shaped double printing units arranged vertically one above the other, each consisting of two printing units forming a double printing point, the printing unit cylinders of which are all stored in an intermediate frame section and inking units assigned to the printing units are each stored in outer frame sections. The adjacent frame sections are designed so that they can be changed in relation to one another.

The invention has for its object a printing unit To create multi-color web-fed rotary printing press and methods for handling it.

The object is achieved by the features of claim 1, 3, 7 or 9 or 10 or 11.

The advantages that can be achieved with the invention are, in particular, that in a first aspect, despite the compact design, high print quality is ensured with little effort. On the one hand, this is achieved in that the printing group cylinders can remain in a fixed, for example preset position, even when the printing unit is opened (reproducibility). Secondly, the quality (duplication) is increased in that a connecting plane of the axes of rotation of the cooperating transfer cylinders forms an angle unequal to 90 °, in particular between 77 and 87 °, with the plane of the web entering the respective double printing unit. Furthermore, the use of finite rubber blankets designed as multi-part printing blankets can result in a rigid mounting of the printing unit cylinders in the frame walls (rigidity).

This configuration is supported or possible by a drive concept specially adapted to it. To avoid a drive train reaching over the separation point between the printing unit cylinder and the inking unit, each double printing unit is rotatably driven by at least one of its own drive motors independently of the other double printing units and the assigned inking units. Each inking unit accordingly has its own independent drive motor for its rotary drive. Gear play in the area of a separable gear as well as a transfer of impacts to the pressure point via the drive train, resulting from reversing movements in the inking unit, are avoided. In an advantageous embodiment, the printing group cylinders can all be individually driven by independent drive motors. However, in order to minimize the effort with high quality and variability, in the preferred embodiment here interacting form and transfer cylinders in pairs driven by a drive motor independent of the other pairs. Thus, it is still possible to change the printing form of each individual printing point by means of the drive motor which drives the pair, both in printing operation and in maintenance and possibly in longitudinal registers. In this context, the frame section accommodating all printing unit cylinders is also advantageous in terms of a simple construction, since a common lubricant chamber can be formed here for all drive trains of the printing units.

Of particular advantage in terms of quality and compact design is the design of the printing or inking units as printing or inking units of "waterless offset printing", ie there is no dampening solution supply (dampening unit) provided, the colors and the printing forms are appropriate Properties selected.

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

Show it:

1 shows a printing unit in operating position B;

2 shows a printing unit in maintenance position A;

3 shows a drive configuration in front view;

4 shows two drive configurations in plan view;

Fig. 5 two versions of the inking unit. A printing machine, e.g. 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, or web 02 for short, is repeated several times, e.g. B. here fourfold, or several webs can be printed one or more times simultaneously. The printing unit 01 has a plurality (in the present case four) of double printing units 03 arranged vertically one above the other for double-sided printing in rubber-to-rubber operation. The double printing units 03 are each formed by two printing units 04, each of which is designed as a transfer cylinder 06 and a cylinder 06; 07, e.g. B. printing unit cylinder 06; 07 and an inking unit 08. A (double) pressure point 05 is formed in each case between the two transfer cylinders 06. The components mentioned are only designated on the uppermost double printing unit 03 of FIG. 1, the (double) printing units 03; 04, however, are essentially identical, in particular in the configuration of the features relevant to the invention.

Forme and transfer cylinder 07; 06 are preferably designed with a bale width of at least four standing printed pages arranged next to one another in newspaper format, in particular in broadsheet format. For example, a double-width web 02 can be printed side by side with four sides, and the forme cylinder 07 can accordingly be coated with four printing forms side by side. The cylinders 06; 07 has a circumference which essentially corresponds to two printed pages arranged one behind the other in newspaper format.

The printing couple cylinders 06; 07 of the several (four) double printing units 03 arranged one above the other are rotatably mounted in a central frame or wall section 11, which in turn is preferably arranged fixed in space, that is to say, for example, on a floor 09 of the printing room, a fixed 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 each in frame or Wall sections 12; 13 mounted, which in turn are vertically movable relative to the central frame section 11 relative to the floor 09 or support 09 or mounting plate 09 or mounting frame 09 (hereinafter support 09). For this purpose, the outer frame sections 12; 13 in corresponding bearing elements 14; 16 of the frame section 12; 13 and the carrier 09 stored. As shown, these can be rollers 14 running in rails 16 or alternatively as linear guide elements 14; 16 be executed.

The wall sections 11; 12; 13 designed in such a way that in their operating position B on their mutually facing side they are essentially complementary to one another in pairs and move together at their dividing lines or butt lines 17; 18 nevertheless form an essentially closed side front (FIGS. 1 and 2). Thus, the largest possible area for accommodating the bearings in the corresponding frame section 11; 12; 13 can be achieved and requirements for noise, personal and / or dirt protection can be met. In order to achieve the most stable possible storage with correspondingly strong cylinder journals, the central frame section 11 deviates from a vertical alignment in the region of the cylinder bearings (not shown in FIGS. 1 and 2) and has corresponding bulges 19 that receive the bearings. The outer frame sections 12; 13 have correspondingly complementary recesses 21. The recesses 21 and bulges 19 are on the bearing arrangements in the inking unit 08 and printing unit 04 with regard to sufficient or even the greatest possible strength of the enclosure, i. H. at least a minimum thickness formed by the respective frame.

Fig. 2 shows a maintenance position A on both sides of the printing points 05, the relative position of the inking units 08 to the printing unit cylinders 06; 07 by moving the frame sections 12; 13 is effected. It can also only one side is turned off (maintenance position A), while the other is in operating position B. In principle, the relative positions can also be achieved in a different embodiment in that an outer frame section 12 (13) is fixed in space, and the middle and the other outer frame section 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 couple cylinders 06; 07 of the printing unit 01, the pins of the forme and transfer cylinders 07; 06 each end with gears 22; 23, in particular spur gears 22; 23, are non-rotatably connected and form a drive connection in pairs. The drive in pairs takes place advantageously from a drive motor 24 via a gear, in particular a reduction gear, to one of the two cylinders 06; 07, in particular the forme cylinder 07. The drive on the forme cylinder 07 contributes to the simple and robust construction due to the shorter travel range. In the example, the drive takes place 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 can be connected in a rotationally fixed manner to the forme cylinder journal, on which the pinion 26 drives. In this embodiment, the spur gears 22; 23 are toothed in favor of axial relative displaceability (side register) and the gear 27 and pinion 26 are helically toothed (strength). In principle, it is also possible to first drive with the configurations mentioned onto the transfer cylinder 06 and from there onto the forme cylinder 07 (reference numbers 06 and 07 would then have to be interchanged). In a variant not shown, the output from the drive motor 24 to one of the cylinders 06; 07 not via a gear connection (pinion) but a traction mechanism gear (e.g. belts, especially toothed belts with corresponding pulleys). If the drive motor 24 is dimensioned sufficiently strong and / or has an attachment gear (reduction), the drive motor 24 can also coaxially on one of the cylinders 06; 07 of the couple. As can be seen in FIG. 4, the frame section 11, together with a cover 28, preferably forms the spur and gear wheels 22; 23; (27) or pinion 26 containing lubricant chamber 29. This preferably extends over the four spur gears 22; 23 of a double printing unit 03 in width and across all four double printing units 03 in height. I.e. there is one for the printing couple cylinders 06; 07 of the printing unit 01 common lubricant chamber 29.

The double printing units 03 are designed relative to the intended vertical web run in such a way that a connecting plane of the axes of rotation of the cooperating transfer cylinders 06 with the plane of the web 02 entering the respective double printing unit 03 in the starting position has 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 cylinders 07 do not lie in the same plane as that of the transfer cylinders 06, i. H. the double printing units 03 are not linear, but angled - preferably bridge-shaped. The cylinders 06; 07 are accordingly stored in the frame section 11. As indicated schematically in FIG. 4 a by double dashes, the pins of the transfer cylinders 06 are mounted in radial bearings 32, which in turn are mounted in eccentric bushes 33 for the adjustability of the transfer cylinders 06. This storage can be z. B, be designed as a three-ring or four-ring bearing 32, 33. In one variant, only one of the transfer cylinders 06 is mounted so as to be adjustable and the other is fixed. The storage of the forme cylinders 07 can also be carried out, but only the radial bearings 31 are indicated.

In a preferred embodiment, the printing unit 01 is a printing unit 01 for the dry offset, i.e. designed for waterless or dampening medium offset printing. In this embodiment, the printing unit 01 has no dampening units and is therefore even more compact. In Fig. 1, the inking units 08 are shown symbolically and can in of different types.

In a first embodiment which is particularly advantageous with regard to the compact design, the inking units 08 are designed as short inking units 08 (FIG. 2, top right), i. H. they have an anilox roller 34 which dips into an ink pan 36, takes up ink there and by a doctor device 37, z. B, a doctor knife or a doctor blade, the excess paint is stripped off. Ink tray 36 and doctor blade device 37 can preferably be designed as a chamber doctor blade 36, 37 as a structural unit, which receives its ink from an ink supply via a pump, not shown. The anilox roller 34 preferably has one of the printing unit cylinders 06; 07 mechanically independent drive motor 35. The ink is removed from the anilox roller 34 by at least one application roller 38, advantageously two (FIG. 2) or even three, and fed to the forme cylinder 07. Since the cups of the anilox roller 34 essentially define the amount of ink to be picked up, the amount of ink can be produced either via a relative speed of two rollers or advantageously via the temperature of the ink and / or ink-transporting components (for example at least the anilox roller 34). The anilox roller 34 is in this case by one of the printing unit cylinders 06; 07 mechanically independent, in particular also independent of application rollers 38, own drive motor 35 driven in rotation. If the amount of ink changes significantly, the anilox roller 34 may have to be replaced by another.

In an embodiment which is advantageous with regard to the variability in the amount of ink, the inking units 08 according to FIGS. B. executed as rollers f arbwerke 08. Again, the ink is applied to the printing form of the forme cylinder 07 by several (here two) application rollers 38. The application rollers 38, however, do not receive the ink by means of an anilox roller 34, but rather via a roller train which has at least one oscillating roller 39 with a hard surface, a so-called distribution cylinder 39; a roller train which has two distribution cylinders 39 with a hard surface and an intermediate one is advantageous Intermediate roller 41 has a soft surface. The Distribution cylinder 39 remote from the forme cylinder receives the ink via a further intermediate roller 41 from a film roller 42 with a hard surface. For the concept of the divisible printing unit 01, it is provided that the two distribution cylinders 39 are mechanically coupled to one another via a transmission (gear train or traction mechanism transmission) and by means of a common printing unit cylinder 06; 07 mechanically independent drive motor 43 are rotationally driven (drive train shown in broken lines). An oscillating axial movement of the two distribution cylinders 39 can be converted in a simple embodiment from the rotary movement thereof via a corresponding gear. However, an embodiment is advantageous in which the axial movement is carried out by at least one other drive motor, not shown. The intermediate and application rollers 41; 38 are preferably driven only via friction. The film roller 42 receives the ink from a duct roller 44 with which it forms a nip. The duct roller 44 is rotatably driven by its own drive motor 46. The ink can be metered onto the roller 44 in various ways.

In a simple embodiment (FIG. 5a), the ductor roller is designed as an immersion roller 44, which is immersed in the ink reservoir of an ink tray 47. The color quantity to be transported via the gap to the film roller 42 is set by targeted control of the rotational speed of the drive motor 46 (the duct roller 44).

In an advantageous variant (FIG. 5 b), the inking unit 08 is designed as a pump inking unit 08 and receives the required amount of ink controlled by a pump device 48, which allows the amount of ink to be applied to the duct roller 44 in a targeted manner by means of one or more pumps. The amount of ink to be applied can advantageously be controlled zonally for sections of the duct roller 44 in the axial direction, which is achieved by means of several pumps or several individually controllable valves or in particular a combination of both. In this way, a different color requirement can be taken into account over a web to be printed. The pump (s) can be designed as a piston pump or as a continuously running gear pump. As indicated in FIGS. 1, 2 and 5, the transfer cylinders 06 preferably have at least one axially extending opening 49, in particular channel opening 49, on their circumference, into which the ends of an elevator 51 depicted in FIG. 5b can be inserted and possibly into an inner channel can be attached. The elevator 51 is advantageous as a multi-part printing blanket 51, eg a dimensionally stable carrier plate (e.g. metal) and an elastic layer (e.g. rubber). B. so-called. Metal printing blanket 51 executed. Two printing blankets 51 are preferably arranged axially next to one another on the four printing pages wide transfer cylinders 06, which are advantageously offset in the circumferential direction (for example by 180 °). In contrast to blanket sleeves, this makes it possible to change the elevators 51 without providing an opening and correspondingly releasable radial bearings in the wall section 11. In operating position B, the elevator 51 can be comfortably extracted from the space between the inking units 08 and printing unit cylinders 06; 07 can be changed. The same applies to access to a web 02 in the event of problems during pulling in or after a web break.

It is advantageous if the maintenance position A has to be assumed in the above-mentioned incidents, but not in the case of routine printing form changes. As depicted in FIG. 1, at the bottom left for all printing units 04, in an advantageous development all printing units 04 are assigned printing plate changing devices 52 or printing plate handling devices 52. These can advantageously have two guides, on one of which the printing form, in particular the printing plate, guided between the inking units 08, can be fed to the form cylinder 07 and on the other of which the printing form to be removed can be removed from the form cylinder 07. The guides can also be designed as closed shafts. The printing form changing devices 52 or their guides / shafts are connected to the outer frame sections 12; 13 connected and are moved together with them when moving the inking units 08. For feeding or removing the printing plates Expediently, at least one transport means is provided for the printing form, which has, for example, a drive means (e.g. motor) and a driven holding means (friction surface, stop, squeegee). For the routine change of printing form, the printing unit 01 therefore does not have to be moved into its maintenance position A, which in turn would result in time and possibly an adjustment of settings and readjustment. The printing couple cylinders 06; 07, in particular also the transfer cylinders 06 forming the printing point 05, can remain in their relative position to one another.

The printing forme handling device 52 is preferably designed so that, viewed in the axial direction of the forme cylinder 07, a printing forme can be handled on four sections next to one another. This can be done by correspondingly wide continuous guides or shafts and at least four transport means for the sections, or by four guides / shafts arranged next to one another, each with assigned transport means.

The cylinders 06; 07 and / or printing form handling devices 52 is to be used accordingly on six printed pages side by side.

LIST OF REFERENCE NUMBERS

01 printing unit

02 material web, web

03 double printing unit

04 printing unit

05 Pressure point, double pressure parts

06 Transfer cylinder, printing unit cylinder

07 cylinders, forme cylinders, printing unit cylinders

08 Cylinder, inking unit, short inking unit, rollers for inking unit, pump inking unit

09 Floor, support, mounting plate, mounting frame

10 -

11 frame section, wall section, middle

12 frame section, wall section, outer

13 frame section, wall section, outer

14 bearing element, roller, linear guide element

15 -

16 bearing element, rail, linear guide element

17 dividing line, butt line

18 dividing line, butt line

19 Bulge 0 - 1 recess 2 gear, spur gear 3 gear, spur gear 4 drive motor 5 - 6 pinion 7 gear 28 cover

29 Lubricant compartment

30 -

31 radial bearings

32 radial bearings

33 eccentric bushing

34 anilox roller

35 drive motor

36 paint tray

37 Rake device

38 applicator roller

39 roller, distribution cylinder

40 -

41 intermediate roller

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, printing blanket, metal printing blanket

52 printing plate changing devices, printing plate handling device

A Maintenance position B Operating position α angle

Claims

Expectations

1. Printing unit of a multi-color web-fed rotary printing press with a plurality of vertically superposed double printing units (03) each consisting of two printing units (04) forming a double printing point (05), the printing unit cylinders (06; 07) all of which are in a central frame section (11), and the printing units (04 ) assigned inking units (08) are each stored in outer frame sections (12; 13), the adjacent frame sections (1 1; 12; 13) being changeable in relation to one another, characterized in that the form and transfer cylinders (07; 06) each printing unit (04) is coupled in pairs via a gear connection (22; 23) and is driven in pairs by its own drive motor (24) such that the gear connections (22, 23) of all printing unit cylinders (06; 07) of the printing unit (01) are in one , through the middle frame section (11) and a cover (28) formed lubricant space (29) are arranged, and that the color ke (08) for their rotary drive on the assigned outer frame section (12; 13) each have at least one drive motor (35; 43) that is independent of the printing unit cylinders (06; 07).

2. Printing unit according to claim 1, characterized in that the printing unit cylinders (06; 07) are each mounted in radial bearings (31; 32) and that a dividing or butting line (17; 18) between the middle and the outer frame section (11 ; 12; 13) deviates from a vertical alignment in such a way that both for the bearing arrangements in the inking unit (08) and the printing unit cylinder (06; 07) each have a minimum thickness for surrounding the radial bearing (31; 32) is realized by the respective frame section (11; 12; 13).

3. Printing unit of a multi-color web-fed rotary printing press with a plurality vertically superimposed double printing units (03) each consisting of two printing units (04) forming a double printing point (05), the printing unit cylinders (06; 07) all of which are in a central frame section (11), and the inking units (08) assigned to the printing units (04) each in outer frame sections (12; 13) are mounted, the adjacent frame sections (11; 12; 13) being changeable in relation to one another, characterized in that the printing unit cylinders (06; 07) are each mounted in radial bearings (31; 32) and that a dividing or butt line (17; 18) between the middle and the outer frame section (1 1; 12; 13) deviates from a vertical alignment in such a way that both for the bearing arrangements in the inking unit (08) and the printing unit cylinder (06; 07) a minimum thickness of the encirclement of the radial bearing (31; 32) is realized by the respective frame section (11; 12; 13) with regard to encircling the bearing,

4. Printing unit according to claim 2 or 3, characterized in that the central frame section (11) on the front side at the level of the forme cylinder (07) has protruding bulges (19) from the vertical alignment, which surround the radial bearings (31) of the forme cylinder ( 07) form or reinforce.

5. Printing unit according to claim 4, characterized in that the outer frame sections (12; 13) corresponding to the bulges (19) have complementary recesses (21).

6. Printing unit according to claim 1, or 3, characterized in that the double printing units (03) are bridge-shaped, and that a connecting plane of the axes of rotation of the cooperating transfer cylinders (06) with the plane of the web entering the respective double printing unit (03) ( 02) forms an angle (α) between 77 ° and 87 ° in the position.

7. Printing unit of a multi-color web-fed rotary printing press with a plurality of bridge-shaped double printing units (03) arranged vertically one above the other, each consisting of two printing units (04) forming a double printing point (05), the printing unit cylinders (06; 07) all of which are in a central frame section (11), and the printing units ( 04) assigned inking units (08) are each stored in outer frame sections (12; 13), and the adjacent frame sections (1 1; 12; 13) can be changed in spacing relative to one another, characterized in that the double printing units (03) in the Are designed in a bridge-shaped manner that a connecting plane of the axes of rotation of the cooperating transfer cylinders (06) with the plane of the web (02) entering the respective double printing unit (03) forms an angle (α) between 77 ° and 87 ° in the position of contact.

8. Printing unit according to claim 1, 3 or 7, characterized in that a printing form handling device (52) is provided for each printing unit (04), each of which is arranged in the corresponding outer frame sections (12; 13) connected to them.

9. Printing unit of a multi-color web-fed rotary printing machine with a plurality of vertically superposed double printing units (03) each consisting of two printing units (04) forming a double printing point (05), the printing unit cylinders (06; 07) all of which are in a central frame section (11), and the printing units ( 04) assigned inking units (08) are each stored in outer frame sections (12; 13), the adjacent frame sections (11, 12; 13) being able to be changed in spacing relative to one another, and wherein a printing plate handling device (52) per printing unit (04) is provided, characterized in that the printing form handling devices (52) are arranged in the outer frame sections (12; 13) connected to them.

0. A method for handling a printing unit (01) according to one of claims 8 or 9, characterized in that a printing form change is carried out on one of the printing units (04) by means of the printing form handling device (52) while the outer one has this printing form handling device (52) Frame section (12; 13) and the middle frame section (11) are in the operating position (B),

1 . Method for handling a printing unit (01) according to one of claims 8 or 9, characterized in that an elevator (51) designed as a finite printing blanket (51) is changed on a transfer cylinder (06) of one of the printing units (04) while the this printing unit (04) assigned to the outer frame section (12; 13) and the middle frame section (11) to each other in the maintenance position (A), d. H. are moved apart.