EP1767354A2 - Printing unit - Google Patents

Abstract

The unit has two nine-cylinder satellite arrangements (1, 2), where each arrangement comprises print works with form cylinders (11.3-11.10) and transfer cylinders (12.3-12.10), and satellite cylinders (13, 14). The form cylinders are arranged at the transfer cylinders, where the ratio of circumferences of the form cylinders to the satellite cylinders is 1:3 and the ratio of circumferences of the form cylinders to transfer cylinders is 1:1. Printing plates (11.1, 11.2) are arranged on the form cylinders relative to the circumference of the form cylinders.

Description

The invention relates to a printing unit consisting of two nine-cylinder satellite arrangements with an approximately vertically fed, then guided on a satellite cylinder, successively passing the pressure points with a first, second, third and fourth transfer cylinder and then guided on a further satellite cylinder, successively the pressure points with a fifth, sixth, seventh and eighth transfer cylinder passing and then approximately vertically discharged substrate web, wherein a form cylinder is arranged on each transfer cylinder.

From the DE 101 14 347 A1 the applicant, the contents of which is incorporated in full in this application, a printing unit consisting of nine-cylinder satellite arrangements is known in which the four each having a form and a transfer cylinder containing printing units, which are employed on a satellite cylinder having. Furthermore, in this document, two nine-cylinder satellite printing units are shown, which are arranged one above the other in a standing construction. A substrate web is first printed on one side in 4-color in the lower printing unit and then fed to the upper printing unit, where the printing substrate in reverse printing also 4-sided and 4-color is printed. The supply and removal of the printing material web to or from the satellite cylinder takes place in such a way that the web partially wraps around the respective transfer cylinder placed at the inlet or outlet and located in the printing shutoff.

In order to ensure a dynamic plate change and shut down individual transfer cylinders can, guide rollers were placed, which realize a shutdown of the transfer cylinder while the web is running enabling web. If one or more transfer cylinders are moved into a print shutdown in which they can also be stopped, the guide rollers ensure that the printing material web is still guided and transported around the satellite cylinder.

The inventors have set themselves the task of further improving such a printing unit.

This object is achieved by a printing unit according to claim 1 and according to claim 5.

The inventors have recognized that it is beneficial for both the placement of the washing cylinders for the transfer cylinders, the washing devices for the satellite cylinders and the placement of the plate changing devices when more space is created between the transfer cylinders arranged around the satellite cylinder. This space can be created by the fact that the satellite grows in circumference and thus also increases the distances between the subsequent transfer cylinder to this.

Here, however, the following problem to be solved: with increasing satellite cylinder and thus corresponding increasing cylinder mass, the drives of this cylinder must be correspondingly larger dimensions. In a printing unit, for example, a four or six-page wide version in the form of 4/2 or 6/2, in which the form cylinder each carry two printing plates and according to the transfer cylinder must take the printed images of the two printing plates, only a satellite cylinder can be arranged which only has a circumference which is an integer multiple of the circumference of the forme cylinder. With an appropriate integer increase in the size of the satellite cylinder an adaptation of the drive components is correspondingly difficult, whereby 4/2 or 6/2 printing units for this seem to be less suitable. For example, in a four-circumference satellite cylinder very much space is required and also a slowdown of this satellite cylinder when shutting down the printing machine is difficult to implement.

The inventors have further recognized that in printing units in which the forme cylinders each carry only one printing plate relative to the circumference of the forme cylinder, but optionally a plurality of printing plates in the width of the forme cylinder side by side, and with a cylinder to cylinder ratio of 1: 3 in circumference, there is sufficient space between the transfer cylinders adjoining the satellite cylinders, and at the same time the driveability is controllable due to the growing satellite cylinder mass.

From the knowledge gained, the inventors propose a printing unit consisting of two nine-cylinder satellite arrangements with an approximately vertically fed, then guided on a satellite cylinder, successively passing the pressure points with a first, second, third and fourth transfer cylinder and then on a further satellite cylinder guided, successively passing the printing locations with a fifth, sixth, seventh and eighth transfer cylinder and then approximately vertically discharged printing substrate, wherein a cylinder is arranged on each transfer cylinder to improve in that the ratio of the sizes of forme cylinder to satellite cylinder 1 to 3 is.

This makes it possible, on the one hand, that during printing individual printing units and the associated transfer and forme cylinders can be stopped and, on the other hand, there is sufficient space between adjacent transfer cylinders for the placement of various devices.

In various embodiments of the printing unit, the ratio of the sizes of forme cylinder to transfer cylinder may be either 1 to 1, 1 to 2 or 1 to 3.

As an alternative to the triple-sized satellite cylinder, a quadruple-sized satellite cylinder has also proved to be favorable. The ratio of the sizes of forme cylinder to transfer cylinder to satellite cylinder is then 1 to 2 to 4 in this embodiment.

The inventors expressly point out that the indication of the circumferential ratios of the cylinders are not to be evaluated mathematically exactly, for example as ratios of exactly millimeter specifications, but that even slight tolerances, which result from the variation in circumference by clamped or unclamped printing plates or blankets are also included.

For example, a circumference ratio of forme cylinder to transfer cylinder to satellite cylinder is from 450 mm (+/- 2 mm) to 900 mm (+/- 10 mm) to 1800 mm (+/- 2 mm) as a circumference ratio of 1 to 2 to 4 in the sense understood the invention, although mathematically speaking does not add exactly 1 to 2 to 4 with the addition of tolerance information.

It is advantageous if the circumference of the forme cylinder is between 400 mm and 700 mm, preferably between 450 mm and 600 mm. Here, the resulting masses of the transmission and satellite cylinders and the associated necessary for driving and deceleration drive components can be realized without much effort.

Relative to the circumference of the forme cylinder, at least one pressure plate is arranged on the forme cylinder. With respect to the width of the forme cylinder, one or two or three or four or five or six or seven or eight printing plates may be arranged side by side. In this case, exactly one or two or three or four or five or six or seven or eight pages of a printed product can be imaged on a printing plate. With a possible tabloid arrangement, the number of pages can increase up to 16.

In order to print different print formats with the print unit, the one to eight pages can either be displayed in broadsheet format, or the two to sixteen pages in tabloid format or in panorama format on the printing plate. But also a combination of the three types of formats on a printing plate is proposed by the inventors.

It is advantageous if in each case one arranged the supplied and discharged printing material from the first and fourth transfer cylinder and the fifth and eighth transfer cylinder in the print-off holding guide roller is. These guide rollers enable web guiding around the satellite cylinders when printing one or more transfer cylinders.

Furthermore, it is favorable if a satellite washing device is arranged between the incoming and outgoing printing material web and / or at its opposite side on the satellite cylinder. The arranged between the fed and discharged printing substrate satellite washing device allows cleaning of the print tray, which comes from the page just printed on the satellite cylinder, while the other side of the substrate is being printed.

At least on the first and second transfer cylinder and on the third and fourth transfer cylinder, a blanket washing device should be arranged in each case. As a result, two transfer cylinders can be cleaned in pairs. In addition to this, a blanket washing device can be arranged on all four transfer cylinders.

The blanket washing devices, wherein two pairs or even four can be individually adjusted to the transfer cylinder, are present in a symmetrical manner to the second nine-cylinder satellite accordingly.

The nine-cylinder satellite arrangements can operate either by the offset printing method or by the indirect gravure printing method. For this purpose, an adjustment of the inking units is made to the respective printing process.

It is advantageous if the printing unit and its cylinders are four, five, six, seven or eight pages wide. The more the width of the printing unit increases, the stiffer the cylinders are designed to prevent deflection and cylinder vibration. For example, the cylinders can have shafts made of CFRP (carbon fiber reinforced plastic) or GRP (glass fiber reinforced plastic), which already have low bending properties due to the material. Cylinder jackets made of metal can then be applied around these shafts.

Due to the favorable space between the adjacent transfer cylinders and corresponding to the cylinder adjacent to the transfer cylinders form a plate changing device can be mounted on each forme cylinder, which is arranged on the printing unit, that each one pressure plate can be initially introduced without curvature in the printing unit.

Figur 1:

Seitenansicht auf ein Zylinderpaar und einen Satellitenzylinder;

Figur 2:

Seitenansicht auf weiteres Zylinderpaar mit Satellitenzylinder mit anderem Umfangverhältnis der Zylinder;

Figur 3:

Zwei übereinander angeordnete Neun-Zylinder-Satellitendruckeinheiten.

Preferred embodiments of the invention will become apparent from the dependent claims and the description below. Various embodiments of the invention will be described, without being limited thereto, with reference to the drawings. Showing:

FIG. 1:

Side view of a cylinder pair and a satellite cylinder;

FIG. 2:

Side view of another cylinder pair with satellite cylinder with different circumference ratio of the cylinder;

FIG. 3:

Two stacked nine cylinder satellite pressure units.

Hereinafter, the present invention will be described with reference to FIGS. 1 to 3.

1 shows a side view of a pair of cylinders, consisting of Form-11.3 to 11.10 and transfer cylinder 12.3 to 12.10, which are employed on a satellite cylinder 13, 14, as used for example in known 4/2 or 6/2 printing units. The direction of rotation of the cylinder is indicated by arrows 28. The circumference of the forme cylinder 11.3 to 11.10 and the transfer cylinder 12.3 to 12.10 is the same size, while the satellite cylinder 13, 14 is twice as large as the circumference of the forme cylinder 11.3 to 11.10 and the transfer cylinder 12.3 to 12.10.

Since the forme cylinder 11.3 to 11.10 each carries two pressure plates 11.1 and 11.2 and thus on the transfer cylinder 12.3 to 12.10 at a 360 degree rotation of these two cylinders and two print images 12.1 and 12.2 on the transfer cylinder 12.3 to 12.10 are present on the double Large satellite cylinder 13, 14 accordingly alternately twice the first printed image 12.1 and twice the second printed image 12.2.

In order to obtain space between the adjacent transmission cylinders 12.3 to 12.10 and forme cylinders 11.3 to 11.10 in a four-cylinder nine-cylinder satellite arrangement around the central satellite cylinder 13, 14, the satellite cylinder 13, 14 can either maintain the print image order grow four, six or another integer multiple of the circumference of the forme cylinder 11.3 to 11.10.

FIG. 2 shows a side view of another cylinder pair with satellite cylinders 13, 14 with a different circumference ratio of the cylinders, as proposed by the inventors. The ratio of the circumferences between form 11.3 to 11.10, transmission 12.3 to 12.10 and satellite cylinder 13, 14 is here 1 to 2 to 3. The direction of rotation of the cylinder is also indicated by arrows 28. In contrast to the cylinder arrangement of Figure 1 of the forme cylinder carries 11.3 to 11.10 only a pressure plate 11.1 relative to the circumference of the forme cylinder 11.3 to 11.10. With this peripheral ratio of the cylinders, sufficient space is created between adjacent transfer cylinders 12.3 to 12.10 in a nine-cylinder satellite arrangement, so that, for example, washing devices or plate changing devices can be easily placed therebetween. In addition, the only one printing plate 11.1 supporting form cylinder 11.3 to 11.10 allows a simple print image sequence on the transmission 12.3 to 12.10 and the satellite cylinder 13, 14th

FIG. 3 shows a printing unit consisting of a nine-cylinder satellite arrangement 1 with a further nine-cylinder satellite arrangement 2 arranged above it. A printing material web 15 is supplied on the right in FIG. 3, imprinted in the perfecting method, and discharged on the right in FIG , Each nine-cylinder satellite array 1, 2 contains four printing units 3 to 10 each having one (first to eighth) forme cylinders 11.3 to 11.10 and one (first to eighth) transfer cylinders 12.3 to 12.10. In this designation, the number after the dot indicates the position number of the associated printing unit.

Each nine-cylinder satellite arrangement 1, 2 has a satellite cylinder 13, 14, with which the associated printing units 3 to 6 and 7 to 10 cooperate and form pressure points.

The first 12.3 and second 12.4, third 12.5 and fourth 12.6 transfer cylinders are arranged at a smaller distance from each other on the satellite cylinder 13. As a result, a large free peripheral area of the satellite cylinder 13 is created between the first 12.3 and the fourth 12.6 transfer cylinder. In this area, a printing substrate 15 in the direction of the arrow to the nine-cylinder satellite 1 and discharged. In this case, the supplied substrate web 15 is guided via a guide roller 16 and the discharged printing substrate 15 via a guide roller 17. The guide roller 16 is placed so that the substrate web 15, the nearest first transfer cylinder 12.3, in whose area it is guided, does not touch when it is in the print off. The print-off of the first transfer cylinder 12.3 is shown in dashed lines. The guide roller 17 is placed so as to keep the printing substrate 15 to be removed from the nine-cylinder satellite arrangement 1 away from the fourth transfer cylinder 12.6 located in the printing shutoff, whose area passes the printing material web 15 last (ie, this transfer cylinder 12.6 is not touched becomes). At the first and second transfer cylinders 12.3, 12.4 and the third and fourth transfer cylinders 12.5, 12.6 each a blanket washing device 19, 20 can be adjusted.

In the further nine-cylinder satellite arrangement 2, the printing substrate 15 is fed in the range between the fifth 12.7 and eighth 12.10 transfer cylinder. In this area, two guide rollers 21, 22 are arranged. In this case, the guide roller 21 is placed so that the printing material web 15 does not touch the closest transfer cylinder 12.7, the area of which it passes first in its print-off. The guide roller 22 is placed so that the to be paid from the nine-cylinder satellite 2 substrate 15 from the nearest transfer cylinder 12.10, the area is passed last, is kept away so that this transfer cylinder 12.10 is not touched in its printing. On the fifth 12.7 and sixth 12.8 transfer cylinder is a Blanket washing device 23 and on the seventh 12.9 and 12.10 eighth transfer cylinder another blanket washing device 24 adjustable. The pressure shutdowns of the fifth 12.7 to 12.10 eighth transfer cylinder, each shown in dashed lines.

The fifth 12.7 and the eighth 12.10 transfer cylinder are spaced apart such that between them a satellite washing 27 finds room. On the other hand, the distance between the sixth 12.8 and the seventh 12.9 transfer cylinder, with the satellite washing device 27 removed, provides access for a hand-cleaning of the satellite cylinder 14.

The printing substrate 15 is first supplied approximately vertically to the second nine-cylinder satellite array 2 after passing through the first nine-cylinder satellite array 1. It is guided via the guide roller 21 on the satellite cylinder 14 and passes in succession the pressure points, the employees of the satellite cylinder 14 fifth, sixth, seventh and eighth transfer cylinder 12.7, 12.8, 12.9, 12.10 in salaried to the satellite cylinder 14 state (pressure) with this forms. The substrate web 15 is again printed on one side 4-color. Thereafter, the printing material web 15 is removed via the guide roller 22 from the nine-cylinder satellite assembly 2.

In the nine-cylinder satellite arrangements 1, 2, a dynamic plate change is possible at each printing unit 3 to 10, that is, a printing plate change, in which a printing unit, such as the printing unit 6, is turned off and stopped, while the other printing units, for example the Printing units 3 to 5 of the nine-cylinder satellite assembly 1, continue to print the substrate web 15. It is at the printing unit, in which the printing plate change is made, both the forme cylinder 11.3 to 11.10 and the transfer cylinder 12.3 to 12.10 shutdown. Due to the circumference ratio of forme cylinder 11.3 to 11.10 and satellite 13, 14 of 1 to 3 and the gap thus obtained, the pressure plates 11.1 can be inserted or retracted without curvature in the plate changing devices provided for plate changing 29.

For washing the satellite cylinder 13 of the nine-cylinder satellite arrangement 1, the satellite washing device 18 can be set against it. The satellite cylinder 14 is washable by means of the satellite washing device 27. The transfer cylinders 12.3 to 12.10 are washable by means of the associated blanket washing devices 19, 20, 23, 24.

The nine-cylinder satellite assemblies 1, 2 of the embodiment operate on the offset printing method. Representing the printing units 3 to 8 and 10, only an inking unit 25 and a dampening unit 26 (top left in FIG. 3) are numbered on the printing unit 9. The nine-cylinder satellite arrangements 1, 2 can also operate according to another printing method, for example the indirect gravure printing method. In this case, a gravure inking unit 25.1 is then arranged on the forme cylinder 11.3 to 11.10 (indicated in brackets in the drawing) and the dampening unit 26 is dispensed with.

It is understood that the abovementioned features and the features of the claims can be used not only in the particular combinations indicated, but also in other combinations or in isolation, without departing from the scope of the invention.

LIST OF REFERENCE NUMBERS

1

first nine-cylinder satellite arrangement

2

second nine-cylinder satellite arrangement

3

printing unit

4

printing unit

5

printing unit

6

printing unit

7

printing unit

8th

printing unit

9

printing unit

10

printing unit

11.1

printing plate

11.2

second pressure plate

11.3

first form cylinder

11.4

second form cylinder

11.5

third form cylinder

11.6

fourth form cylinder

11.7

fifth form cylinder

11.8

sixth form cylinder

11.9

seventh form cylinder

11:10

eighth form cylinder

12.1

Printed image of the printing plate

12.2

Printed image of the second printing plate

12.3

first transfer cylinder

12.4

second transfer cylinder

12.5

third transfer cylinder

12.6

fourth transfer cylinder

12.7

fifth transfer cylinder

12.8

sixth transfer cylinder

12.9

seventh transfer cylinder

12:10

eighth transfer cylinder

13

satellite cylinder

14

second satellite cylinder

15

printing material

16

guide roll

17

guide roll

18

Satellite wash

19

Blanket wash

20

Blanket wash

21

guide roll

22

guide roll

23

Blanket wash

24

Blanket wash

25

inking

25.1

Gravure inking

26

dampening

27

Satellite wash

28

Direction of rotation of the cylinders

29

Plate changing device

Claims (27)

Printing unit consisting of two nine-cylinder satellite arrangements (1, 2) with an approximately vertically supplied, then on a satellite cylinder (13), successively passing the pressure points with a first, second, third and fourth transfer cylinder (12.3 - 12.6) and then on a further satellite cylinder (14), successively passed the printing areas with a fifth, sixth, seventh and eighth transfer cylinder (12.7 - 12.10) and thereafter approximately vertically discharged printing substrate (15), wherein at each transfer cylinder (12.3 -12.10) a forme cylinder (12.3 -12.10) 11.3-11.10), characterized in that the ratio of the circumferences of the forme cylinder (11.3-11.10) to the satellite cylinder (13, 14) is 1 to 3. Printing unit according to claim 1, characterized in that the ratio of the peripheries of the forme cylinder (11.3 - 11.10) to transfer cylinder (12.3 -12.10) is 1 to 1. Printing unit according to claim 1, characterized in that the ratio of the peripheries of the forme cylinder (11.3 - 11.10) to transfer cylinder (12.3 -12.10) is 1 to 2. Printing unit according to claim 1, characterized in that the ratio of the peripheries of the forme cylinder (11.3 - 11.10) to transfer cylinder (12.3 -12.10) is 1 to 3. Printing unit according to the preamble of claim 1, characterized in that the ratio of the perimeters of forme cylinder (11.3 - 11.10) to transfer cylinder (12.3 -12.10) to satellite cylinder (13, 14) is 1 to 2 to 4. Printing unit according to one or more of claims 1 to 5, characterized in that the circumference of the forme cylinder (11.3 - 11.10) between 400 mm and 700 mm, preferably between 450 mm to 600 mm. Printing unit according to one or more of claims 1 to 6, characterized in that relative to the circumference of the forme cylinder (11.3 - 11.10) at least one pressure plate (11.1, 11.2) on the forme cylinder (11.3 - 11.10) is arranged. Printing unit according to claim 7, characterized in that, based on the width of the forme cylinder (11.3 - 11.10) one or two or three or four or five or six or seven or eight printing plates (11.1, 11.2) are arranged side by side. Printing unit according to one or both of Claims 7 and 8, characterized in that exactly one or two or three or four or five or six or seven or eight pages of a printed product are imaged on a printing plate (11.1, 11.2). Printing unit according to one or more of claims 7 to 9, characterized in that the one to eight pages in broadsheet format on the printing plate (11.1, 11.2) are shown. Printing unit according to one or more of claims 7 to 9, characterized in that two to sixteen pages in tabloid format on the printing plate (11.1, 11.2) are shown. Printing unit according to one or more of claims 7 to 9, characterized in that one to four pages in panoramic format on the printing plate (11.1, 11.2) are shown. Printing unit according to one or more of claims 1 to 12, characterized in that on a printing plate (11.1, 11.2) the plurality of pages in broadsheet format and / or tabloid format and / or panorama format are mapped. Printing unit according to one or more of claims 1 to 13, characterized in that in each case one of the fed and discharged printing material web (15) from the first (12.3) and fourth (12.6) transfer cylinder and the fifth (12.7) and eighth (12.10) transfer cylinder in the Pressure shutoff away holding guide roller (16, 17, and 21, 22) is arranged. Printing unit according to one or more of claims 1 to 14, characterized in that a satellite washing device (18, 27) is arranged between the incoming and outgoing printing material web (15) and / or at its opposite side on the satellite cylinder (13, 14). Printing unit according to one or more of claims 1 to 15, characterized in that at least on the first (12.3) and second transfer cylinder (12.4), and on the third (12.5) and fourth transfer cylinder (12.6) in each case a blanket washing device (19, 20) is arranged , Printing unit according to claim 16, characterized in that a blanket washing device (19, 20) is arranged on all four transfer cylinders (12.3 - 12.6). Printing unit according to one or more of claims 1 to 17, characterized in that at least on the fifth (12.7) and sixth transfer cylinder (12.8) and seventh (12.9) and eighth transfer cylinder (12.10) in each case a blanket washing device (23, 24) is arranged. Printing unit according to claim 18, characterized in that in each case a blanket washing device (23, 24) is arranged on all four transfer cylinders (12.7 - 12.10). Printing unit according to one or more of Claims 1 to 19, characterized in that the nine-cylinder satellite arrangements (1, 2) operate according to the offset printing method. Printing unit according to one or more of claims 1 to 20, characterized in that the nine-cylinder satellite arrangement (1, 2) operate according to the indirect gravure printing method. Printing unit according to one or more of claims 1 to 21, characterized in that the forme cylinders (11.3 - 11.10), the transfer cylinders (12.3 -12.10) and the satellite cylinders (13, 14) are made four sides wide. Printing unit according to one or more of claims 1 to 22, characterized in that the forme cylinder (11.3 - 11.10), the transfer cylinder (12.3 -12.10) and the satellite cylinder (13, 14) are made five pages wide. Printing unit according to one or more of claims 1 to 23, characterized in that the forme cylinder (11.3 - 11.10), the transfer cylinder (12.3 -12.10) and the satellite cylinder (13, 14) are six sides wide. Printing unit according to one or more of claims 1 to 24, characterized in that the forme cylinders (11.3 - 11.10), the transfer cylinders (12.3 -12.10) and the satellite cylinders (13, 14) are made seven pages wide. Printing unit according to one or more of claims 1 to 25, characterized in that the forme cylinder (11.3 - 11.10), the transfer cylinder (12.3 -12.10) and the satellite cylinder (13, 14) are eight pages wide. Printing unit according to one or more of claims 1 to 26, characterized in that on each forme cylinder (11.3 - 11.10) a plate changing device (29) is provided, which is arranged on the printing unit such that the at least one pressure plate (11.1, 11.2) initially can be introduced without curvature.

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