DE19807167C2 - Printing form cylinder for a printing machine with register adjustment - Google Patents

Description

The invention relates to a printing form cylinder for a printing press with register adjustment.

From US 1 651 295 A a printing press cylinder with axial register adjustment is known. The cylinder body is formed from at least two half-shells, one on the bearing seats Shaft are axially movable. The half shells are through on the side of the shaft arranged guide elements against which the actuators support connected axial actuators.

A forme cylinder for a digital printing press is also known (DE 43 03 872 A1), in which the two receiving and unwinding printing film in the forme cylinder arranged rollers can be adjusted in the axial and circumferential directions.

Due to the winding principle, there is no use from outside the printing press illustrated printing plates possible.

The object of the invention is to provide a printing form cylinder with an integrated axial and Circumferential register adjustment for each of the two illustrated and outside the press printing plates attached to the printing form cylinder.

According to the invention, the object is achieved by a printing form cylinder with the features Claim 1 solved. Appropriate configurations are disclosed in the subclaims.

The inventive solution is described in more detail using an exemplary embodiment.

The drawing shows in

Fig. 1-sectional view of the printing form cylinder,

Fig. 2 side view.

. In the illustration of the printing form cylinder according to Figure 1 and 2 for better clarity shown in each case the circumferential register adjustment above the center line of the plate cylinder, the Axialregisterverstellung and below the center line of the plate cylinder; Otherwise, an axial register adjustment and a circumferential register adjustment are arranged both in the upper and in the lower part.

The printing form cylinder consists of a shaft 1 with three bearing seats 2 arranged as circular disks and spaced apart along the printing form cylinder width, two half shells 3 assigned to the bearing seats 2 ; 4 and laterally arranged on the bearing seats of the printing form cylinder guide elements 5 ; 6 .

Depending on the width of the printing form cylinder, one or two bearing seats 2 or a number of bearing seats 2 exceeding three are also possible.

The guide elements 5 ; 6 allow a displacement of the half-shells 3 ; 4 on the bearing seats 2 , as well as a rotation of the half shells 3 , 4 in the circumferential direction within adjustment limits, but prevent the assignment of the half shells 3 ; 4 to the bearing seats 2 is lost. The guide elements 5 ; 6 advantageously act as bearer rings at the same time.

Each half sheep 3 , 4 is each with two clamping devices 7 ; 8 for fastening and tensioning one on each half shell 3 ; 4 arranged pressure plate 9 equipped.

Axialregisterverstellung to the pressure plate 9, the half-shells 3 are; 4 axially displaced relative to the bearing seats 2 on the same.

To this end, each half-shell 3, 4, in Figures 1 and 2 in the upper part of the representation shown in the first half-shell 3, at least one which is supported against the second guiding element 6 the first actuator. 10 - formed in the case shown as a screw - and at least one spring 11 supported against the first guide element 5 . The actuating element 10 is connected to a first actuating element 12 , which is designed as an electric motor. When the first actuating element 12 is actuated, the first actuating element 10 is rotated and the first half-shell 3 including the clamped pressure plate 9 is displaced in the axial direction.

To the circumferential register adjustment of the printing plate 9, the half-shells 3 are; 4 rotated radially on the bearing seats 2 .

For this purpose, with each half-shell 3 , 4 , shown in FIGS. 1 and 2 in the lower part of the illustration with the second half-shell 4 , at least one pressure piece 13 is firmly connected.

The pressure piece 13 extends perpendicular to the axial direction. A second actuating element 16 is arranged on the shaft 1 and is supported against a first side 14 of the pressure piece 13 .

The second actuating element 16 is connected to a second actuating element 15 - designed as an electric motor. When the second actuating element 15 is actuated, the second actuating element 16 is rotated and the second half-shell 4 including the clamped pressure plate 9 is rotated in the radial direction.

A pressure spring 18 connected to the shaft 1 is assigned to the second side 17 of the pressure piece 13 .

REFERENCE NUMBERS

1

wave

2

bearing seat

3

first half shell

4

second half shell

5

first guide element

6

second guide element

7

first tensioning device

8th

second tensioning device

9

printing plate

10

first control element

11

feather

12

first actuator

13

Pressure piece

14

first page

15

second actuator

16

second actuator

17

second page

18

compression spring

Claims (4)

1. Printing form cylinder for a printing press with a register adjustment for two printing plates clamped by means of clamping devices, with a shaft ( 1 ) with bearing seats ( 2 ) formed thereon, which extend over the width of the printing form cylinder, for the movable mounting of half-shells ( 3 , 4 ) which hold the printing plates ( 9 ) and hold by means of the clamping devices ( 7 , 8 ), the half-shells ( 3 , 4 ) for axial register adjustment on the bearing seats ( 2 ) being axially displaceable and guided by guide elements ( 5 , 6 ) arranged on the side of the shaft ( 1 ) and each half shell ( 3 , 4 ) is assigned at least one first adjusting element ( 10 ) which is supported against the one of the guide elements ( 5 , 6 ) and is connected to a first actuating element ( 12 ), characterized in that
that for the axial register adjustment each half shell ( 3 , 4 ) is assigned a spring ( 11 ) which is supported against the other of the lateral guide elements ( 5 , 6 ),
that for a circumferential register adjustment, each half-shell ( 3 , 4 ) on the bearing seats ( 2 ) can be rotated in the circumferential direction and is fixedly connected to at least one pressure piece ( 13 ) arranged perpendicular to the axial direction, on the first side (14) of which a second actuating element ( 15 ) connected, on the shaft ( 1 ) arranged second actuating element ( 16 ) engages and on its opposite second side (17) engages a compression spring ( 18 ) arranged on the shaft ( 1 ). 2. Printing form cylinder for a printing machine according to claim 1, characterized in that the guide elements ( 5 ; 6 ) are designed as bearer rings. 3. Printing form cylinder for a printing machine according to claim 1, characterized in that the actuating elements ( 12 ; 15 ) are designed as electric motors. 4. Printing form cylinder for a printing machine according to claim 1, characterized in that the shaft ( 1 ) carries at least two bearing seats ( 2 ) arranged at a distance across the printing form cylinder width.