DE202009018080U1 - punching machine - Google Patents

Abstract

Punching machine (1 ') with a magnetic cylinder (20) and a counter-punching cylinder (30), characterized in that an at least five years aged frame (9) and a precision bearing (26) for the magnetic cylinder (20) are provided.

Description

The The invention relates to a punching machine with a magnetic cylinder and a counter punch cylinder.

Both printing presses and punching machines are basically known in the art. Such printing machines comprise a printing part with printing cylinder or pressure roller and counter-pressure roller. From the WO 2005/021265 A2 For example, a sheet-fed offset printing machine for printing individual sheets is known. This sheetfed offset printing press comprises, in addition to a printing or coating unit, a device for punching out cutouts in the sheets in the printing or coating unit of the printing press. The printing or coating unit comprises a rubber or varnish cloth cylinder and a counter-pressure cylinder, which limit a gap for the passage of the sheets. One of the cylinders is provided with a stamped sheet having over its outer surface protruding burrs. The printing or coating unit further comprises a suction device for sucking the punched out on passing through the gap from the cut-outs punching waste. In order to prevent lifting of the sheets from the other cylinder as a result of suction applied to the sheet negative pressure, the punching sheet is provided in the circumferential direction of the rubber or varnish cylinder with protruding Andruckleisten pressing the sheet in the region of the gap against an outer surface of the other cylinder ,

All Printing and punching machines are expensive to buy. Further at least the printing presses have to be retracted, to ensure consistent machining precision achieve.

Of the present invention is based on the object, as possible cost-effective punching machine to create a special Precise punching already right after the commissioning of the Punching machine allowed.

The Task becomes for a punching machine after the generic term of claim 1 achieved in that at least five Years of frame and a precision bearing for the Magnetic cylinders are provided. Be further developments of the invention defined in the dependent claims.

Thereby a cost effective way is created based on a printing press a punching machine available to ask, so that only individual parts of the printing machine replaced but not the cost of rebuilding a punching machine must be spent. The further big advantage is that by using a aged under substantially constant operating conditions Frame of the printing press this is low tension and thus special Good concentricity for the stored in this Cylinder can be achieved. Instead of the printing cylinder or the pressure roller is now provided the magnetic cylinder in conjunction with the counter punch cylinder, to any kind of punching Paper and cardboard. Therefore a printing usually a normal storage of Pressure roller with a lower requirement for precision The storage is sufficient, proves a precision storage for the magnetic cylinder and the punching cylinder as extreme advantageous, as in punching a high precision is required, so that the punching result due to such precision storage can be optimized. Advantageous is a hydraulic storage of the magnetic cylinder chosen as a precision bearing, As a result, a very precise storage even when Processing of cardboard can be achieved. Especially with the punching of cardboard can it in a magnetic cylinder storage over Spring force come to a lifting or jumping of the cylinder, so that the precision of the position of the magnetic cylinder is not or at least can hardly be guaranteed.

Around a precise execution of punching operations to ensure the magnetic cylinder advantageous a concentricity of ± 5 μm to its bearings on. It also proves to be advantageous, even the counter-punching cylinder with a concentricity of ± 5 μm to its bearings to provide. This is a particularly precise punching execution possible.

magnetic cylinders and counter-punching cylinders are advantageously designed so that with these punching, punching, perforating punching, grooving or creases and window punches are performed can. Depending on what kind of punching made should be, a protector or stamping sheet on the counter punch cylinder and at least one stamped profile or punching element on the magnetic cylinder trained accordingly.

When It also proves to be advantageous, at least one adjusting device for adjusting or adjusting the position of the magnetic cylinder provided. This is the positioning of the magnetic cylinder also possible with high precision. Especially can counter-balance cylinder and magnetic cylinder thereby be precisely aligned with each other to achieve an optimal Punching result to achieve.

The counter-punching cylinder is or is advantageously provided with the protector sheet, which is advantageous is designed as a hardened sheet. To accommodate the protector sheet of the counter-punching cylinder is advantageously provided with a clamping device or a tensioning rail system for releasably securing the protector sheet. It is also possible to provide another fastening system for securing the protector sheet. For receiving the clamping device, the counter-punching cylinder may advantageously be provided with at least one recess and / or recess. This can be arranged in particular in the region of the counter-punching cylinder, which lies remote from the processing region, ie the region which comes into contact with the paper sheets or cardboard to be punched. Likewise, the protector sheet is advantageously provided with at least one fastening device for fastening to the counter-punching cylinder, in particular with openings, recesses or cut-outs for the engagement of fastening means, such as screws or bolts. This is a particularly stable and at the same time precise arrangement of the protector plate on the counter punch cylinder possible. Alternatively, the protector could be glued to the surface of the counter-punching cylinder, but then usually no longer the required hardness can be guaranteed, since the adhesive layer is yielding soft, so that it can lead to inaccuracies during the punching process. Further, replacement of the protector sheet is less easily possible than providing releasable fasteners such as screws or bolts. An exchange of a worn protector sheet is thus much worse possible with the provision of an adhesive layer than when releasable fastening devices are provided. The provision of an adhesive layer also has the disadvantage that it would have to be removed by solvent, which in turn, however, attack the adhesion of the magnets of the magnetic cylinder and thus damage or at least partially render it useless.

By a complete removal of the printing part can the dimensions of the punching machine in height opposite the printing press can be reduced, resulting in ease of use increases and thus reduces set-up times.

Also it is possible, the counter pressure roller itself to the counter punch cylinder rebuild, so not to remove them and by a new counter punch cylinder to replace. The counter punch cylinder can in any case surface-treated, in particular chromium-plated and correspondingly ground to the requirements and provided with the protector sheet become.

Advantageous are also in particular in the area of the magnetic cylinder and / or the counter punch cylinder safety devices for the protection of Intended for users. It can in particular at least one light grid as a safety device against unintentional interference with a Boom chain to be provided for a single sheet extraction. Next These safety devices can also further control devices be provided, such as a manual device or automatic advancement of the magnetic cylinder and / or of the counter-punching cylinder or a jogging operation control device for stepwise forward and / or backward movement of the magnetic cylinder for providing this with a punched profile or punching element or for dressing this. Not only at the first startup, but also below, it proves to be advantageous, the magnetic cylinder easy to position for a change from punched profile sheets or punching elements and later Trimming the cylinder, as consistently as possible to provide the same concentricity to a precise To ensure stamping image. Especially can be a calibrated trimming device for trimming the magnetic cylinder be provided in the micron range.

Further is it possible to provide sensors in the punching machine, the regular the condition of the magnetic cylinder and possibly also the counter-punching cylinder with regard to their concentricity and monitor other condition. Furthermore, a Measuring device and a display device for measurement, adjustment and displaying the position of the magnetic cylinder and / or the counter punch cylinder installed or provided to each other. Advantageous is the Measuring or interrogation device formed digitally for determining the position of the magnetic cylinder and / or the counter-punching cylinder. Also may be a digital display device for displaying the cylinder position and / or the Zylinderbeistellung between magnetic and counter-punching cylinder be provided.

Advantageous is the magnetic cylinder with a number of pockets for engagement provided by grippers for fixing holding bows.

The Task is also solved by the use of a cast steel frame an at least five-year-old offset printing press for Production of a punching machine. Especially when using a cast steel frame an offset printing press that is at least five years old ensures that it is stress-relieved while operating conditions remain the same is aged, so for the punching machine is special give good long-term constant concentricity properties. hereby can achieve the desired precision in punching operations be achieved particularly well.

The object is also achieved by a punching machine, wherein at least one numbering direction and / or an imprint device is provided for numbering / are. By such a numbering device or

imprinting apparatus can be a numbering of sheets or individual parts done a bow. By combination with a punching machine It is thus possible in particular on a sheet of material Delimit areas by perforations and / or punches and these with separate numbering, in particular consecutive are to be provided. For example, not only labels, but also stamps etc. or security prints with a continuous Numbering to be made on sheets.

Advantageous At least one numbering shaft and switching curves can be provided his and / or a book printing unit. It is also possible to provide at least a jacket cylinder and a nylon cliche, in each case attaching numbers possible on the sheets processed in the machine is.

Around Transfer color from one rubber roller to the next, is advantageously provided a transfer roller. This one will integrated into the punching machine instead of a plate cylinder. Also, at least one distributor roller for rubbing paint be provided. It proves to be particularly advantageous, a Oscillating device for lateral oscillation of the distributor roller to rub the paint. This makes the paint application special well evened.

When It also proves to be advantageous, at least one color box and to provide a lifting roller in the region of the punching machine, so that These space-saving devices also help with numbering can be arranged in the punching machine.

A Numbering shaft can instead of one in a printing press otherwise provided rubber cylinder in this to form the punching and Numbering machine are introduced. One in a normal printing press Existing plate cylinder can either be removed or bypassed become. Because of the relative large diameter, its fundamental wave is very stable, so this is great for the individual elements of the Punching and numbering machine can be used. In a bridge the plate cylinder can be designed as a flange bearings and a roller bearing are arranged on the flange bearing, so that just needs to be screwed in a bit and Thus, the printing press can be converted in a simple way can. When converting the press into a punching and Numbering machine can use the numbering station either as the first station or as a second station and according to the punching station either be formed as a second or as the first station. The chronological order can from the respectively to be punched and numbered sheet or the finally resulting stamped objects be made dependent.

to closer explanation of the invention will be hereinafter an embodiment of this closer of the drawings. These show in:

1 a schematic diagram of a printing machine with a pressure roller and a counter-pressure roller and indicated magnetic cylinder and counter-punching cylinder for conversion into a punching machine,

2 a side view of a magnetic cylinder for installation in the printing machine according to 1 instead of the pressure roller there,

3 a side view of a counter-punching cylinder according to the invention without protector sheet,

4 a sectional view of the counter-punching cylinder according to 3 along the line AA, without protective sheet,

5 a sectional view of the counter-punching cylinder according to 3 along the line AA with attached protector sheet,

6 a detailed view of the 5 in the area of a clamping rail receptacle for clamping the protector sheet,

7 a plan view of the protector plate and its fastening device with additionally enlarged details of the fastening device and the clamping rail, and

8th a schematic diagram of a punching and numbering machine, manufactured on the basis of a printing press.

1 shows a schematic diagram of a printing press 1 with a pressure roller 2 and a counter pressure roller 3 , The printing press 1 also has a housing 4 and at least one frame 9 on, are arranged in the pressure roller and counter-pressure roller and other components of the printing press.

As by the arrows 5 . 6 indicated, are used to retool the printing press 1 in a punching machine 1' the pressure roller 2 and the counter-pressure roller 3 taken and instead a magnetic cylinder 20 as well as a counter punch cylinder 30 in the case 4 inserted into the machine. This is through the arrows 7 . 8th indicated. The resulting punching Machine is by the reference numeral 1' indicated.

It thus becomes the frame 9 the used printing press continues to be used for the new punching machine, which has the advantage that due to the use of the printing press at substantially constant operating conditions, the frame has a low stress, so that a precise storage of the magnetic cylinder in particular, but also the counter-punching cylinder is possible. For example, the press may have run 40 to 50 million presses before being converted to the punch press. It is thus a very precise storage and guarantee constant concentricity properties for magnetic cylinder and counter punch cylinder possible.

Instead of replacing the counter pressure roller against the counter punch cylinder 30 can the counterpressure roller 3 also removed and converted into the counter punch cylinder. This can in particular be worked up, chrome-plated and ground in order to achieve the desired concentricity required for punching machine utilization. Here, the counter-punching cylinder is also provided with a clamping or clamping rail system for receiving a punching plate, which further down to the 3 to 7 is explained in more detail.

In order to provide a particularly precise storage for the magnetic cylinder, but also for the counter-punching cylinder, the bearings of pressure roller and counter-pressure roller are renewed or by a precision bearing 26 replaced as they are in 2 is indicated. In particular, a hydraulic bearing is suitable here.

Furthermore, side cheeks of the housing 4 the printing press 1 removed and replaced with smaller side panels, since when removing the printing part an upper part of the printing press can be removed. All other cylinders of the printing machine, in particular a plate cylinder, which are arranged above the counter-pressure roller can be removed. This results in a lower height of the punching machine compared to the printing press, thus a smaller footprint, and a lower power consumption, thus lower energy costs. Various safety devices to protect the user and the punching machine can also be installed, these being in 1 not shown. Furthermore, electrical safety circuits are adapted to the new use as a punching machine and a possibly existing safety control is extended or renewed. For trimming the magnetic cylinder and possibly also the counter-punching cylinder, a jogging control can be provided, which allows a stepwise forward and backward movement of the magnetic cylinder and possibly also of the counter-punching cylinder. As a result, adjustments for the desired concentricity of particular ± 5 microns of magnetic cylinder and counter-punch cylinder can be guaranteed at any time.

In order to adjust the magnetic cylinder and the counter-punching cylinder with respect to their position exactly, an electronic digital display, if necessary, on both sides of the punching machine, is provided. Such is in 1 but not shown. Furthermore, sensors for sensing the respective position of magnetic cylinder and counter punch cylinder can be integrated into the machine. These too are in 1 but not shown.

2 shows a partially broken side view of the magnetic cylinder 20 in an exemplary embodiment. The magnetic cylinder 20 has a number of pocket-like recesses 21 on, in the gripper can engage for fixing sheets to be punched. In the area of the gripper edge are additional magnets 22 provided to keep the die safe.

The magnetic cylinder 20 is ground with high precision and has a runout accuracy of +/- 5 μm. This, in combination with the high-precision storage, makes an optimal punching possible. In the bow area 25 of the magnetic cylinder 20 can be recorded in different shapes or individual punch segments to produce the desired stamping images depending on the application. In this case, in particular complete punching, stamping, as for example for labels, perforations, stamped cuts or creases or grooving in any version are possible. The respective shape of the punched pictures as well as the type of punching can be varied as desired.

The 3 to 7 show an exemplary embodiment of the counter-punching cylinder 30 , This one is with a protector sheet 31 provided, which is connected in a special way with this. The connection is made via a clamping rail 32 as they are in 5 is particularly good to see, as well as in the enlarged view in 7 , The clamping rail 32 is in a recess 33 attached to the counter-punching cylinder via a number of screws. Except the recess 33 the counter punch cylinder still has an inner channel 34 in the longitudinal direction, so it is not designed as a solid solid body. This channel 34 is particularly good at the sectional views along the line AA 3 in 4 and 5 refer to. The clamping rail 32 is enlarged in 7 shown. The assembly of both is in 5 to see. The clamping rail 32 has a number of through holes 35 on to those on the body of the counter punching cylinder 30 to be releasably fastened by means of screws. Furthermore, the protector sheet with or without locking screws on the counter-punching cylinder 30 be attached, so only between clamping rail 32 and counter punch cylinder clamped or additionally held there by screws. Without securing screws, replacement of the protector plate is easier and faster.

As 7 can be further removed, has the protector sheet 31 in its edge area 36 recesses 37 on. With the recesses 37 grips the protector plate over the screws for attaching gripper pads 44 time. The protector sheet may further on the lateral surface of the counter-punching cylinder 30 be aligned with the plan.

In his the edge area 36 opposite edge area 38 the protector sheet is replaced by another releasable fastening device 39 held clamped. This includes a screw 40 as well as a nut part 41 , The nut part 41 is with a towards the inner channel 34 the counter punch cylinder extending blind hole 42 Mistake. The blind holes 42 serve for tensioning the protector sheet. In the outer ring or Schmitzring 45 of the counter-punch cylinder 30 are right and left or at both ends tapped holes 46 provided for receiving pivot pins, not shown, in the blind holes 42 intervention.

In particular 4 can be removed, is the counter punch cylinder 30 not always provided with a uniformly shaped lateral surface, but has a remote area 43 on. In 5 is the counter punch cylinder 30 with attached protector sheet 31 shown. The counter-punching cylinder is thus milled and trimmed accordingly for a particularly secure recording of the protector sheet.

For the punching process are on the magnetic cylinder 20 Sheets with punched profile or punching elements applied. These can have a line height of 1 mm in order to be able to punch cardboard up to 350 g / m ² . The respective punched profiles or individual punched segments can be mounted on the surface of the magnetic cylinder without the aid of further tools, so that here an application-specific easy-to-handle change of these is possible. Due to the good accessibility of the magnetic cylinder, such a change is also facilitated.

Magnet- and counter-punching cylinders are in particular with a concentricity ground by +/- 5 microns to their bearings. In combination with the especially precisely calibrated Protector sheets on the counter punch cylinder or laser cut punched sheet metal on the magnetic cylinder can be minimal tolerances Punching, perforating, grooves or grooves etc. can be achieved.

To the mutual alignment or addition of magnetic and counter punch cylinder Sensors are placed in the machine and in particular a digital display to work with a very high accuracy too can. For a protector, punching plate change or change the sheets with the punched profile on the magnetic cylinder can the magnetic cylinder and the counter punch cylinder manually moved forward and backward continuously. hereby is also easy to trim the cylinder to ensure the high concentricity accuracy possible. Any required Trimming by means of calibrated trimming material is problem-free in the μ-range possible. By using the components of a printing machine, combined with a precision bearing, such as a hydraulic Storage, the magnetic cylinder can work with a high force effect, so that particularly good punching results are achieved can. Just by using a hydraulic Storage can be a jumping of the cylinder when punching cardboard boxes be avoided, which is a spring force bearing of the magnetic cylinder can not be guaranteed. Especially when grooving and Punching of larger cardboard weights proves therefore the use of hydraulic cylinders with appropriate Hydraulic power units or a hydraulic bearing of the magnetic cylinder as particularly advantageous.

in principle It is not only possible from the press a punching machine but also to the press while maintaining of the printing unit the magnetic cylinder and the counter punch cylinder with to integrate the appropriate additional components. It is also possible, these two cylinders and the additional components in the coating unit of the printing press too integrate. By such integration of the punching components In the printing press, a so-called inline punching machine is created.

8th shows a punching and numbering machine 1' , This includes next to the magnetic cylinder 20 and the counter punch cylinder 30 are in the punching and numbering machine 1' a numbering wave 47 as well as an impression cylinder 48 intended. Furthermore, a color box 49 and a squeegee roller 50 in the punching and numbering machine 1' arranged. Between the lifting roller and the numbering shaft, a number of transfer rollers are provided. The numbering shaft is arranged on the bearing thereof instead of a rubber cylinder provided in the former printing machine. One at a printing press otherwise provided plate cylinder is removed or bridged, since this in the punching and numbering machine 1' is not needed.

According to the in 8th shown embodiment of the punching and numbering machine 1' takes place at an imported into the machine sheet first numbering and then only the punching process, the machining direction by the end-side arrow 51 is indicated. In principle, it is also possible first to provide the stamping station as the first station and the numbering or impression station as the second station. Concerning. the punching station is referred to the above remarks for converting a printing press in a punching machine.

Next the embodiments described in the foregoing and shown in the figures of Punching machines made of printing presses and magnetic cylinders and counter-punching cylinders for this can still numerous more will be provided, each one at least five years aged frame and a precision bearing for the magnetic cylinder can be provided. At the corresponding counter-punching cylinders can each protector plates by a clamping device be attached to the counter punch cylinder.

LIST OF REFERENCE NUMBERS

1

press

1'

punching machine

2

platen

3

Backing roll

4

casing

5

arrow

6

arrow

7

arrow

8th

arrow

9

frame

20

magnetic cylinders

21

pocket-like recess

22

magnet

23

first The End

24

second The End

25

arch area

26

precision storage

30

Counterpunch cylinder

31

protector sheet

32

clamping rail

33

recess

34

internal channel

35

Through opening

36

border area from 31

37

recess

38

border area from 31

39

fastening device

40

screw

41

female member

42

Grundlochborung from 41

43

stepped Area

44

Gripper pad

45

outer ring

46

threaded hole

47

Nummerierwelle

48

Impression cylinder

49

paintbox

50

vibrator roller

51

arrow

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• WO 2005/021265 A2 [0002]

Claims (31)

Punching machine ( 1' ) with a magnetic cylinder ( 20 ) and a counter punch cylinder ( 30 ), characterized in that a frame aged at least five years ( 9 ) and a precision bearing ( 26 ) for the magnetic cylinder ( 20 ) are provided. Punching machine ( 1' ) according to claim 1, characterized in that as a precision bearing ( 26 ) a hydraulic storage is providable. Punching machine ( 1' ) according to claim 1 or 2, characterized in that the magnetic cylinder ( 20 ) is provided with a concentricity of ± 5 microns to the bearings. Punching machine ( 1' ) according to one of claims 1 to 3, characterized in that the counter-punching cylinder ( 30 ) is provided with a concentricity of ± 5 microns to the bearings. Punching machine ( 1' ) according to one of the preceding claims, characterized in that the magnetic cylinder ( 20 ) is formed or provided with such a punched profile or at least such a punching element or provided that can be generated with this punching, punching, perforating punches, creases and window punches. Punching machine ( 1' ) according to one of the preceding claims, characterized in that at least one adjusting device for adjusting the position of the magnetic cylinder ( 20 ) is provided. Punching machine ( 1' ) according to one of the preceding claims, characterized in that the magnetic cylinder ( 20 ) with a number of pocket-like receptacles ( 21 ) is provided for engagement with grippers. Punching machine ( 1' ) according to one of the preceding claims, characterized in that a device for manual or automatic advancement of the magnetic cylinder ( 20 ) and / or the counter-punching cylinder ( 30 ) and / or intended for a jogging operation. Punching machine ( 1' ) according to claim 8, characterized in that the device comprises at least one pushbutton. Punching machine ( 1' ) according to claim 8, characterized in that a jogging control means for stepwise forward and / or backward movement of the magnetic cylinder ( 20 ) is provided for providing this with a stamped profile or punching element or for trimming this. Punching machine ( 1' ) according to one of the preceding claims, characterized in that the counter-punching cylinder ( 30 ) with a protector sheet ( 31 ) is provided. Punching machine ( 1' ) according to one of claims 11, characterized in that the counter-punching cylinder ( 30 ) with at least one clamping device ( 32 ) for releasably securing the protector sheet ( 31 ) is provided. Punching machine ( 1' ) according to one of claims 12, characterized in that the counter-punching cylinder ( 30 ) with at least one recess and / or recess for fastening the clamping device ( 32 ) is provided. Punching machine ( 1' ) according to one of claims 11 to 13, characterized in that the protector sheet ( 31 ) with at least one fastening device for fastening to the counter-punching cylinder ( 30 ), in particular with openings, recesses or cut-outs ( 37 ) for engaging fasteners. Punching machine ( 1' ) according to one of the preceding claims, characterized in that safety devices, in particular in the region of the magnetic cylinder ( 20 ) and / or the counter-punching cylinder ( 30 ), are provided for the protection of users. Punching machine ( 1' ) according to claim 15, characterized in that at least one light grid is provided as a safety device against unintentional engagement in a boom chain for a single sheet removal. Punching machine ( 1' ) according to one of the preceding claims, characterized in that sensors are provided in the punching machine, which determines the state of the magnetic cylinder ( 20 ) and the counter-punching cylinder ( 30 ) with regard to their concentricity and condition. Punching machine ( 1' ) according to one of the preceding claims, characterized in that a measuring device and a display device for measuring, setting and displaying the position of the magnetic cylinder ( 20 ) and / or the counter-punching cylinder ( 30 ) are provided to each other, in particular a digital measuring or interrogation and / or display device. Punching machine ( 1' ) according to one of the preceding claims, characterized in that a digital display device for indicating the cylinder position and / or the cylinder provision between magnetic ( 20 ) and counter-punching cylinders ( 30 ) is provided. Punching machine ( 1' ) according to one of the preceding claims or according to the preamble of claim 1, characterized in that at least one numbering device and / or an impression device is provided for numbering / are. Punching machine ( 1' ) according to claim 20, characterized in that at least one numbering shaft and switching curves are provided and / or that a book printing unit is provided. Punching machine according to claim 21, characterized that the bearing of a plate cylinder designed as a flange bearing and a roller bearing for a transfer roller the flange bearing is arranged. Punching machine according to claim 20, 21 or 22, characterized characterized in that a first station as a numbering station and a second station is designed as a stamping station or a first Station as punching station and a second station as numbering station is trained. Punching machine ( 1' ) according to claim 20 or 21, characterized in that at least one jacket cylinder and a nylon plate are provided. Punching machine ( 1' ) according to one of claims 20 to 24, characterized in that at least one transfer roller and / or distributor roller is provided for triturating paint. Punching machine ( 1' ) according to claim 25, characterized in that an oscillating means is provided for laterally oscillating the distributor roller for rubbing the ink. Punching machine ( 1' ) according to one of claims 20 to 26, characterized in that at least one ink fountain and a squeegee roller are provided. Use of a cast steel frame ( 9 ) of an at least five-year-old offset printing machine ( 1 ) for producing a punching machine ( 1' ). Counter punch cylinder ( 30 ) for use in a punching machine ( 1' ), in particular according to one of claims 1 to 27, characterized in that the counter-punching cylinder ( 30 ) with at least one clamping device ( 32 ) for releasably securing a protector sheet ( 31 ) is provided. Counter punch cylinder ( 30 ) according to claim 29, characterized in that the counter-punching cylinder ( 30 ) with at least one recess and / or recess for fastening the clamping device ( 32 ) is provided. Counter punch cylinder ( 30 ) according to claim 29 or 30, characterized in that the counter-punching cylinder ( 30 ) with a channel extending in the longitudinal direction of the cylinder ( 34 ) is provided.

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