EP2173557A1

EP2173557A1 - Method for the arrangement of printing blocks on a plate cylinder of a printing machine

Info

Publication number: EP2173557A1
Application number: EP08786016A
Authority: EP
Inventors: Karl Robert SCHÄFER
Original assignee: Koenig and Bauer AG
Current assignee: Koenig and Bauer AG
Priority date: 2007-07-30
Filing date: 2008-07-10
Publication date: 2010-04-14
Also published as: CN101583492B; WO2009016011A1; US20100043660A1; CN101583492A; US7856925B2; DE102007035689B3

Abstract

The invention relates to a method for the arrangement of printing blocks (07, 08) on a plate cylinder (03)of a printing machine, each of the printing blocks being located at one of a plurality of mounting locations located adjacent to each other in the axial direction of the plate cylinder, each of the printing blocks being stored in a storage device comprising storage positions located adjacent to and offset from each other at a fixed distance in the axial direction of the plate cylinder prior to the arrangement of said printing blocks at one of the mounting locations of the plate cylinder, the plate cylinder and/or the storage device being displaced axially relative to each other by a positioning distance, such that said displacement arranges a printing block to be arranged on the plate cylinder at a mounting location located adjacent to the mounting location of another printing block already located there or still to be located there, at a distance (S) reduced relative to the distance (A) between two adjacent storage positions of the storage device.

Description

description

Method of arranging printing forms on a forme cylinder of a printing machine

The invention relates to a method for arranging printing forms on a forme cylinder of a printing press according to the preamble of claim 1.

From DE 10 238 106 A1 a device for arranging printing forms on a forme cylinder of a printing press is known, wherein a printing form storing storage device as a whole in the axial direction of the forme cylinder is displaceable relative to on the forme cylinder juxtaposed mounting locations.

From DE 10 2004 052 020 A1 it is known to movably arrange manipulator heads in the axial direction of the forme cylinder in order to position printing forms in relation to a predetermined page register and to simultaneously change printing forms to be arranged next to one another in the axial direction.

From DE 10 2005 039 773 A1 it is known to arrange printing forms to be arranged on a forme cylinder in a storage device next to one another at a distance which has pressure forms juxtaposed on the forme cylinder in the axial direction thereof and to keep this distance as low as possible.

EP 808 714 B1 discloses a device for the axial positioning of printing plates during mounting on a cylinder of a rotary printing press by means of transport, wherein means for positioning the printing plate on the cylinder in one of a plurality of axially juxtaposed positions preselectable position within a printing plate associated cylinder portion are provided, wherein one, a certain cylinder portion associated pressure plate a plurality of stops or a plurality of sensors are assigned. The invention has for its object to provide a method for arranging printing forms on a forme cylinder of a printing press.

The object is achieved by the features of claim 1.

The achievable with the present invention consist in particular that despite a design-related fixed distance between adjacent juxtaposed memory positions of the memory device stored in or at these memory positions printing forms can be arranged at least almost completely adjacent to adjacent mounting locations on the forme cylinder. As a result, a plurality of individual printing plates in the axial direction of the forme cylinder can be virtually assembled to form a panorama printing form, ie the respective printed images of the individual printing forms complement each other mosaically at least almost to a common uniform printed image. This composite according to the proposed method of several individual printing forms panorama printing form may include all axially juxtaposed on the form cylinder printing forms in the limiting case. In an arrangement of z. B. six or eight juxtaposed printing plates, the forme cylinder has an axial length z. B. from 1,800 mm to 2,400 mm, wherein an integrally manufactured panoramic printing form may have this dimension as its width and thus would be very unwieldy. The proposed method, which juxtaposes the printed images of individual printing forms as possible without a disturbing seam, is therefore a considerable relief in handling compared to otherwise very wide panoramic printing plates, which are also very prone to damage, for the rest. B. by bending or unwanted bumps. The procedure can be fully automated. On a printing press existing storage devices for storing to be arranged on the respective form cylinder printing forms can be used unchanged. An embodiment of the invention is illustrated in the drawings and will be described in more detail below.

Show it:

1 shows an arrangement of a forme cylinder and a printing form storing storage device between two frame walls of a printing press;

FIG. 2 shows an arrangement of a first printing form on the forme cylinder of FIG. 1; FIG.

FIG. 3 shows the forme cylinder of FIG. 1 in an axially changed position; FIG.

4 shows a placement of a second printing form on the forme cylinder of FIG. 1.

Fig. 1 shows an example between a two parallel frame walls 01; 02 arranged form cylinder 03 of a printing press, z. B. in a planographic printing process, preferably in an offset printing process, working printing machine. The printing machine can be designed as a web-fed printing press or as a sheet-fed press. The printing machine is preferably designed as a newspaper printing machine. The printing machine has z. B. a plurality of printing units each having a forme cylinder 03 according to FIG. 1, wherein the forme cylinder 03 each z. B. cooperates with a transfer cylinder, not shown, wherein on the lateral surface of each transfer cylinder in the axial direction side by side each z. B. a plurality of printing ink on a substrate transfer printing blankets are arranged. Also, the form cylinder 03 is associated with an unillustrated inking unit and optionally also not shown dampening unit. The forme cylinder 03 has no register stop. Belonging to one of the printing units of the printing press forme cylinder 03 is on pin 04; 06 in or on the frame walls 01; 02 rotatably mounted and preferably by a solely associated with him drive (not shown) rotatably driven. The forme cylinder 03 has a plurality of plate-shaped flexible printing plates 07; 08 assignable lateral surface, said lateral surface in the axial direction of the forme cylinder 03 a length L z. B. from 1 .800 mm up to 2,400 mm and in the operating state shown in Figure 1 is not yet with printing plates 07; 08 is occupied. For the sake of simplicity, FIGS. 1 to 4 each show only two printing plates 07 to be arranged next to one another in the axial direction of the forme cylinder 03; 08, although four, six or eight printing plates 07; 08 can be arranged next to each other. Each of the printing plates 07; 08 is to be arranged in each case at a certain mounting location on the lateral surface of the forme cylinder 03, wherein the lateral surface of the forme cylinder 03 in the axial direction next to each other has as many mounting locations as printing plates 07; 08 are to be arranged next to each other on the lateral surface of the forme cylinder 03. It can also be provided that on the forme cylinder 03 in the circumferential direction more, z. B. two printing plates 07; 08 can be arranged one behind the other, so that at the respective axial positions of the forme cylinder 03 each more, z. B. two mounting locations in the circumferential direction of the forme cylinder 03 are provided one behind the other. Thus, on the outer surface of the forme cylinder 03 z. B. an assignment with four or six printing plates 07; 08 in the axial direction of the forme cylinder 03 and in each case with two printing plates 07; 08 may be provided in its circumferential direction.

Each of the arranged on the lateral surface of the forme cylinder 03 printing plates 07; 08 has a print image 09; 1 1, which in each case before the arrangement of the respective printing forme 07; 08 on the forme cylinder 03 z. B. in a supplied with data from a pre-printing device on a working surface of the respective printing plate 07; 08 is applied. The location of the print image 09; 1 1, in which the imaging device the respective print image 09; 1 1 on the work surface of the respective printing plate 07; 08 applies, can be variably selected by a preferably electronic control unit and set to meet a specific print job needs.

The printing plates 07; 08 are, before they are arranged at their respectively associated mounting locations of the forme cylinder 03, each arranged in memory positions of a memory device, wherein the memory device is brought with their memory positions in an operative connection to the mounting locations of the forme cylinder 03. In a preferred embodiment, the storage device with its storage positions is at least then at a stationary position between the respective opposite frame walls 01; 02 arranged when the operative connection between their storage positions and the juxtaposed mounting locations of the forme cylinder 03 is made. If in the circumferential direction of the forme cylinder 03 consecutively several printing plates 07; 08 are arranged, this form cylinder 03 associated storage device in association with the respective axial positions of the forme cylinder 03 preferably each have a plurality of storage positions.

The plurality of juxtaposed memory positions of the memory device are each arranged at a fixed, ie unchangeable distance A spaced from each other, said distance A is due to the design of the memory device and z. B. between 3 mm and 10 mm, preferably about 5 mm. In the space formed by the distance A between adjacent memory positions of the memory device is z. B. a fixedly connected to the memory device stop 12 is provided, to which a forme cylinder 03 supplied printing forme 08 with its parallel to their intended conveying direction edge 13 due to a directed in the axial direction of the forme cylinder 03 against this stop 12, acting on this printing plate 08 force before and / or during their feeding to the forme cylinder 03 strikes. During the feeding process, the printing plate 08 may be guided with its edge 13 on the stop 12 to a side register ensure correct feeding of this printing forme 08 to the designated installation location on the forme cylinder 03. With effect for an outer printing forme 07, ie for a printing forme 07, which is associated with one of an end face 14 of the forme 03 closest mounting location of this forme cylinder 03, preferably also another with the memory device firmly connected stop 16 is provided to which this outer printing forme 07 with its aligned parallel to their intended direction of conveyance edge 17 in the manner previously described laterally aligned and z. B. is also performed during its feeding.

1, a machine center 18 and a cylinder center 19 are indicated in each case as auxiliary lines, wherein the center of the machine 18, the geometric center between the two mutually parallel, in this reference frame considered as stationary frame walls 01; 02 and wherein the cylinder center 19 is a measure of the half of the length L of the pressure plates 07; 08 assignable lateral surface of the forme cylinder 03 indicates. In the illustration of FIG. 1, there is an offset V between the machine center 18 and the cylinder center 19, since the forme cylinder 03 is positioned closer to the right frame wall 02 in the example shown in FIG. 1 than at the left frame wall 01 preferred embodiment is provided that the with its pin 04; 06 in the frame walls 01; 02 mounted forme cylinder 03 in its axial direction by a drive, not shown, translationally acting within a predetermined limits preferably variably adjustable travel relative to the frame walls 01; 02 and to the memory positions of the memory device is displaceable and thus between the frame walls 01; 02 can be positioned differently. The maximum travel to which the forme cylinder 03 in its axial direction between the frame walls 01; 02 is displaceable, is in the range of several millimeters, z. B. up to 10 mm, and preferably corresponds to that distance A, the two adjacent memory positions of the memory device between them.

Figs. 2 to 4 explain an embodiment of the method for arranging Printing forms 07; 08 on the forme cylinder 03 shown in FIG. 1, wherein the printing forms 07; 08 are each individually and sequentially fed to their respective mounting location on the forme cylinder 03. In Figs. 2 to 4, the respective frame walls 01; 02 of a particular page of the printing press respectively aligned with each other. In the example explained here, of the two illustrated in Figures 1 to 4 printing plates 07; 08 first the "left" printing plate 07 and then the "right" printing forme 08 are fed to the forme cylinder 03. In order to achieve that the "left" printing plate 07 with its right to its conveying direction parallel edge 21 in spite of the provided in this area stationary, the "right" printing plate 08 associated stop 12 at least as dense z. B. at the cylinder center 19 adjacent to the forme cylinder 03, the forme cylinder 03 is axially displaced to the left, which is indicated in Fig. 2 by a left arrow. After the forme cylinder 03 its caused by the displacement new position between the frame walls 01; 02, the "left" printing plate 07 is conveyed to the forme cylinder 03, which is indicated in FIG. 2 by an arrow oriented orthogonally to the axis 23 (FIG. 1) of the forme cylinder 03, and there at the installation location provided for it a rotational movement of the forme cylinder 03 and finally attached to the lateral surface of the forme cylinder 03 by a positive connection and / or frictional connection by the Aufziehen of the "left" printing plate 07 preceding new axial positioning of the forme cylinder 03 can be a z. B. originally between the machine center 18 and the cylinder center 19 existing offset V reduced or even canceled.

After the "left" printing plate 07 has been mounted on its mounting location provided on the lateral surface of the forme cylinder 03, the forme cylinder 03 is axially repositioned, for example, by the forme cylinder 03 now being displaced to the right by one adjustment path, which is shown in FIG. 3 is indicated by a right arrow, so that the stop 12 aligned and / or guided edge 13 of the "right" When the printing forme 08 is fed to the forme cylinder 03 as closely as possible, that is to say at a distance of 1 mm or less, it comes to lie on the right edge 21 of the adjacent, already mounted "left" printing plate 07. By this arrangement of printing forms, which is very closely spaced apart 07, 08 on the forme cylinder 03, the respective printed images 09, 13 of these printing plates 07, 08 can be guided very close to each other, so that on the printed material quasi the visual impression of printed by a panorama printing form printed image is formed (Fig.

In practice, between adjacent mounted on the plate cylinder 03 printing plates 07; 08, however, a gap 22 with a non-zero gap width S remain (Figure 4), since the dimensions of each printing plate 07; 08 are subject to tolerances due to their manufacturing process. In addition, in a preferred embodiment of the printing plates used in this method 07; 08 at least that edge 13; 17, on one of the stops 12; 16 is aligned, edited by a trimming and thus tolerated in their position. Moreover, the position of a gap between adjacent blankets which are clamped on the transfer cylinder cooperating with the forme cylinder 03 is considerable, since it is not possible to transfer printing ink to the printing substrate at the position of this gap existing between adjacent blankets, and consequently it makes no sense makes, at this position the print image 09; 13 of one of the printing plates 07; 08 provide. In any case, however, by the displacement of the forme cylinder 03, a further arranged on this forme 03 printing plate 08 at a mounting location of a previously arranged printing plate 07 in a relation to the distance A between two adjacent memory positions of the memory device adjacent spaced mounting location arranged on the forme cylinder 03rd arranged. The gap width S of between two adjacent arranged printing plates 07; 08 remaining gap 22 is z. B. less than 3 mm, preferably about 1 mm or less. It is understood that in the manner described above, more than two printing plates 07; 08 successively in the axial direction of the forme cylinder 03 can be arranged side by side, with these printing plates 07; 08 applied print images 09; 13 at least merge almost into one unit and convey in their image on the substrate the impression of a panorama print image, since the participating printing plates 07; 08 at their respective joined edge 13; 21 each one at least there without borders attached print image 09; 13 have. After all involved in the panorama print image printing forms 07; 08 have been arranged on the forme cylinder 03, the forme cylinder 03 can be adjusted in its axial position such that the position of the printed images 09 carried by it; 13 with the position of further printed images 09; 13 on at least one other forme cylinder 03 in the same printing press matches, so that on the same transported by this printing substrate a precisely fitting overprint of the printed images 09; 13 of these different form cylinder 03 is made possible.

If on the forme cylinder 03 in the circumferential direction more, z. B. two printing plates 07; 08 are arranged, these printing plates 07; 08 arranged closely spaced behind one another. Usually, those ends of each printing plate 07; 08, which after the arrangement of these printing plates 07; 08 face on the forme cylinder 03 in its circumferential direction, prior to the arrangement of these printing plates 07; 08 folded on the forme cylinder 03 in a bending device and in the arrangement of these printing plates 07; 08 introduced on the forme cylinder 03 in a slot-shaped opening extending in the axial direction of the forme cylinder 03, wherein this opening opens a channel extending in the axial direction of the forme cylinder 03 under its lateral surface. A slot width of this opening is z. B. less than 5 mm, preferably less than 3 mm, in particular only about 1 mm, so that between the respective ends of two in the circumferential direction of the forme cylinder 03 successively arranged printing plates 07; 08 also a distance z. B. of less than 5 mm, preferably less than 3 mm, in particular only about 1 mm or less results.

By appropriate control of the imaging device, the respective print image 09; 13 virtually borderless on the respective working surface of the successively arranged printing plates 07; 08 are applied so that print images 09; 13 of printing plates 07; 08, which are arranged adjacent to each other in the circumferential direction of the forme cylinder 03, on the substrate to produce the visual impression of a common, contiguous print image. With the proposed method, it is possible to print the respective print images 09; 13 both of several in the axial direction of the forme cylinder 03 juxtaposed printing plates 07; 08 as well as several in the circumferential direction of the forme cylinder 03 successively arranged printing plates 07; 08 to form a mosaic to a common, coherent printed image. Thus, optionally, a group of adjacent printing plates 07; 08, with which the lateral surface of the forme cylinder 03 is occupied, are joined together to form a common, continuous printed image. Finally, the respective print images 09; 13 of all arranged on the lateral surface of the forme cylinder 03 printing plates 07; 08 are combined to form a common, coherent print image if the participating print images 09; 13 on the work surface of their respective printing plate 07; 08 are appropriately placed by an appropriate control of the imaging device.

The above-described method for arranging printing plates 07; 08 on a form cylinder 03 of a printing press is preferably carried out fully automated, with a control unit, for. B. belonging to the printing press control center, both the axial displacement and positioning of the relevant forme cylinder 03 and the supply of the respective printing plates 07; 08 controls this form cylinder 03 when a corresponding control command to form a panorama print image is triggered. Another embodiment of the proposed method for arranging printing plates 07; 08 on a forme cylinder 03 of a printing press can provide that in addition to or alternatively to the displacement of the forme cylinder 03, the storage device is axially displaced by a travel that another shift to be arranged on the forme cylinder 03 printing form 08 at one to the mounting location of the previously arranged printing form 07 arranged in a relation to the distance A between two adjacent storage positions of the storage device reduced distance adjacent mounting location on the forme cylinder 03 is arranged. In any case, in the described method, a lateral, d. h in the axial direction of the forme cylinder 03 directed relative movement between the forme cylinder 03 and the memory device with the proviso, in the arrangement of printing plates 07; 08 on the forme cylinder 03 to reduce the distance A between two adjacent memory positions of the memory device. Accordingly, a relative movement takes place between the forme cylinder 03 and / or the storage device in such a way that a printing forme 08 to be arranged on the forme cylinder 03 is formed by the relatively displaced displacement along an axial travel path at a printing forme which is already preferably arranged there or is still to be arranged 07 arranged in a relation to the distance A between two adjacent storage positions of the storage device reduced distance adjacent mounting location on the forme cylinder 03 is arranged.

LIST OF REFERENCE NUMBERS

01 frame wall

02 frame wall

03 form cylinder

04 cones

05 -

06 cones

07 printing form

08 printing form

09 printed image

10 -

1 1 printed image

12 stop

13 edge

14 front side

15 -

16 stop

17 edge

18 engine center

19 cylinder center

20 -

21 edge

22 gap

23 axis

A distance

L length

S gap width

V offset

Claims

claims

1. A method for arranging printing plates (07, 08) on a forme cylinder (03) of a printing machine, wherein one of the respective printing plates (07, 08) is arranged in one of a plurality of mounting locations arranged side by side in the axial direction of the forme cylinder (03), wherein each the printing plates (07; 08) are stored in a storage position of a storage device having storage locations in the axial direction of the forme cylinder (03) next to one another and at a fixed distance (A) from each other at one of the mounting locations of the forme cylinder (03), wherein the forme cylinder (03) and / or the storage device are displaced axially relative to one another such that by this displacement a printing forme (08) to be arranged on the forme cylinder (03) is already arranged at one of the assembly location of another or yet to be arranged there Printing plate (07) in one opposite the distance (A) between two adjacent Memory positions of the memory device reduced distance adjacent arranged mounting location on the forme cylinder (03) is arranged.

2. The method according to claim 1, characterized in that on the on the forme cylinder (03) in the relation to the distance (A) between two adjacent memory positions of the memory device reduced distance adjacent to be arranged printing plates (07, 08) in each case before their arrangement on the forme cylinder (03) a printing image (09, 11) is arranged in such a way with an imaging device that the relevant printed image (09, 11) extends at least as far as an edge (13, 21) of the respective printing form (07, 08), wherein this edge (13; 21) in each case faces the other of the printing form (07; 08) to be arranged adjacently at a reduced distance.

3. The method according to claim 2, characterized in that each of the other the edge (13) facing the printing plate (07; 08) to be arranged at a reduced distance before and / or during its feeding to the forme cylinder (03) is aligned with a stop (12) belonging to the storage device.

4. Method according to claim 2, characterized in that the respective edge (13) facing the printing forme (07, 08) to be arranged at a reduced spacing is guided on the stop (12) belonging to the storage device.

5. The method according to claim 1, characterized in that more than two printing plates (07; 08) are arranged one after the other in a distance reduced relative to the distance (A) between two adjacent storage positions of the storage device, arranged on the same forme cylinder (03).

6. The method according to claim 1, characterized in that the storage device with its respective one of the printing plates (07; 08) storing memory positions in an operative connection to the mounting locations of the forme cylinder (03) is brought.

7. The method according to claim 1, characterized in that the forme cylinder (03) is axially displaced before it is fed to the first printing plate (07).

8. The method according to claim 1, characterized in that the forme cylinder (03) is displaced axially, after it has been supplied to it the last of the juxtaposed printing forms (07, 08).

9. The method according to claim 1, characterized in that the axial displacement and positioning of the forme cylinder (03) and / or the storage device as well as the supply of juxtaposed printing plates (07, 08) to This form cylinder (03) is automatically executed by a control unit.

10. The method according to claim 9, characterized in that the automated execution of the axial displacement and positioning of the forme cylinder (03) and / or the storage device as well as the supply of juxtaposed printing plates (07, 08) to this forme cylinder (03) by a Control command for forming a panorama print image is triggered.

1 1. A method according to claim 1, characterized in that on the forme cylinder (03) and in the circumferential direction a plurality of printing plates (07, 08) are arranged.

12. The method according to claim 1, characterized in that on the forme cylinder (03) in the axial direction side by side four or six or eight printing plates (07; 08) and in the circumferential direction of the respective axially juxtaposed mounting locations of the forme cylinder (03) respectively at least two printing plates (07, 08) are arranged one behind the other.

13. The method according to claim 1, characterized in that the on the forme cylinder (03) to be arranged printing plates (07, 08) before their arrangement on the forme cylinder (03) with the imaging device each with a print image (09, 1 1) are imaged wherein a position of the respective print image (09, 11) on a work surface of the respective printing form (07, 08) can be selected by a control of the imaging device.

14. The method according to claim 2 or 13, characterized in that the printed images (09; 1 1) of a group of adjacent on the forme cylinder (03) to be arranged printing plates (07; 08) or the printed images (09; 1 1) all on the Form cylinder (03) to be arranged printing plates (07, 08) each by a control of Imaging device be mounted on the respective working surface of the participating printing plates (07, 08) in such a way that the individual printed images (09, 11) of the printing forms (07, 08) belonging to this group or the individual printed images (09, 11) of each of these printing forms (07, 08) in each case mosaically to form a common printed image.

15. The method according to claim 2 or 13, characterized in that the imaging device is controlled by data from a prepress.

16. The method according to claim 1, characterized in that on the forme cylinder (03) in the axial direction adjacent to be arranged printing plates (07; 08) between their edges (13; 21) a gap (22) with a gap width (S) of less than 3 mm, in particular about 1 mm or less.

17. The method according to claim 1, characterized in that on the forme cylinder (03) in the circumferential direction adjacent to be arranged printing plates (07; 08) between their respective ends a distance of less than 3 mm, in particular about 1 mm or less.

18. Method according to claim 1, characterized in that each printing form (07; 08) stored in one of the storage positions of the storage device in each case orthogonal to the axis (23) of the forme cylinder (03) at the mounting location provided for it on the forme cylinder (03) Form cylinder (03) is promoted.

19. Method according to claim 1, characterized in that the printing forms (07; 08) to be arranged on the forme cylinder (03) are mounted on the mounting location provided for them by a rotary movement of the forme cylinder (03).

20. The method according to claim 1, characterized in that on the forme cylinder (03) to be arranged printing plates (07, 08) on the lateral surface of the forme cylinder (03) are fastened in each case by a positive connection and / or frictional connection.

21. A method according to claim 1, characterized in that the memory device with their respective one of the printing plates (07, 08) storing memory positions relative to the forme cylinder (03) is laterally displaced before the forme cylinder (03), the first printing plate (07) is supplied.

22. The method according to claim 1, characterized in that it is carried out in a newspaper printing press.

23. The method according to claim 1, characterized in that it is carried out in a printing press operating in an offset printing method.