EP2388115B1 - Stamping and/or embossing device - Google Patents

Description

The invention relates to a punching and / or stamping device according to claim 1 and a sheet punching and / or embossing machine according to claim 9.

State of the art

As punching the cutting is referred to with closed geometric blank forms that can be circular, oval or polygonal and imaginary shapes of all kinds. Also the practices practiced in print finishing, such as punching with punch, corner punching and register punching are counted to this area. The punching takes place against a punching pad or against stamp, in some cases it is also shearing operations. Packaging materials made of paper, cardboard, cardboard or corrugated board are mainly punched in sheet format. When punching but also creasing lines or blind embossing can be introduced into the benefit. This complex process makes it indispensable to punch the sheets individually. Since the end products are sophisticated packaging in terms of technical and graphic design (such as packaging for cosmetics, cigarettes, pharmacy, food, etc.), special requirements are not only placed on the packaging materials themselves, but are also punching tools for optimum results required with the smallest tolerances and extremely precise and reliable punching machines. Flatbed punching best meets these demands. The printed sheets stacked on a pallet are fed to the punching machine. In the machine, the sheets to be punched are precisely aligned in an alignment device, taken over by a gripper carriage and positioned exactly in the punching device between a fixed undercounter and a vertical over a knee lever or eccentric upper table.

In known sheet punching and embossing machines, which are used for punching, breaking, stamping and depositing sheets of paper, cardboard and the like, it is known to move the sheets by means of gripper carriage through the individual stations of the machine. A respective gripper carriage has a gripper bridge, are attached to the gripper, the grab the bows at a front end. A gripper carriage further has lateral carriages, which are connected to endless chains of the transport system and whereby the gripper carriage to be moved by the machine. By this type of movement of the sheets through the machine, a continuous work in the individual successively arranged stations of the machine, in particular punching, break-away and Nutzentrennstation allows.

Such a flat bed punch is for example from the DE 30 44 083 A1 from which the features of the preamble of claim 1 are known. The two tables are equipped with cutting and scoring tools or corresponding counter tools with which punched out of the cyclically guided between the table surface sheets the benefits and at the same time pressed the necessary for clean folding grooves. In the subsequent breakout the waste is removed by machine tools. Depending on the equipment of the machine finally the punched benefits can be separated in a designated Nutzentrenneinrichtung.

In eccentric punching, it is necessary that the dynamic forces occurring during punching are introduced into solid foundations. In order to avoid vibration of the machine as possible this foundation must have a very large mass. This is on the one hand disadvantageous, because this entails corresponding costs and on the other hand, because a machine can not be installed at any location.

task

Object of the present invention is therefore to provide a punching and / or embossing device for a sheet punching and / or embossing machine, which manages without such a complex foundation.

This object is achieved by a punching and / or embossing device according to claim 1 and by a sheet punching and / or embossing machine according to claim 9.

The punching and / or embossing device according to the invention is suitable for a sheet punching and / or embossing machine for punching and / or embossing sheets of paper, cardboard, plastic and the like. The punching and / or stamping device has a machine frame, a lower table and an upper table, the lower table being immovable, i. fixed, and the upper table is vertically movable by a drive. Advantageously, the undertable is fastened to a yoke by means of connecting elements, i. acting as a carrier cross member, a substantially horizontal cross-beam. In other words: the sub-table hung "suspended". Also, the drive of the upper table and the upper table itself are supported against the yoke - or in other words: are suspended from the yoke - and in turn the yoke is suspended from the machine frame. Due to this advantageous suspension on the yoke, the transmission of vibrations to a foundation of the punching and / or embossing device or the sheet punching and / or embossing machine is substantially reduced. This is achieved by the fact that the force pulses of the moving or deformed components, i. from under table, upper table and drive, in their effect on the suspension point of the yoke almost neutralize. Advantageously, the vibration entry into the foundation and thus the movement of the foundation is reduced.

In an advantageous embodiment of the punching and / or embossing device according to the invention, the drive is designed as an eccentric shaft drive. The above-described advantageous suspension of the upper table and drive also reduces the relative movement between the eccentric shafts of an eccentric shaft drive and the transmission of the Exezenterwellenantriebs, so there lower forces occur, which allows a simpler construction of the drive.

In an advantageous development of the punching and / or embossing device whose machine frame has side walls on which the yoke is suspended. The side walls in turn can be screwed to a machine foundation.

In a particularly preferred embodiment, four connecting elements between under table and yoke are provided, in particular a connecting element in each corner of the

Under the table. The fasteners may be columns with tie rods.

In an advantageous embodiment of the punching and / or embossing device according to the invention this has a device for adjusting the punching or embossing force. This can for example have wedges, which are located between eccentric shafts and upper table and wherein the displacement of successive wedges causes an adjustment of the punching or embossing force. Such a device is the expert, for example from the DE 10 2007 012 638 A1 known.

In order to prevent the vibration entry during punching or embossing, i. When the under table and the upper table meet, the mass of the lower table is a multiple of the mass of the upper table. In particular, the mass of the undertable corresponds to twice to four times the mass of the upper table.

The subject of the invention is also a sheet punching and / or embossing machine with a punching and / or stamping device as described above.

With regard to further advantageous embodiments of the invention, reference is made to the dependent claims and the description of an embodiment with reference to the accompanying drawings.

embodiment

Fig. 1

eine Flachbett-Bogenstanz- und/oder -prägemaschine

Fig. 2a

die erfindungsgemäße Stanz- und /oder Prägeeinrichtung mit dem Obertisch in seiner obersten Position

Fig. 2b

die erfindungsgemäße Stanz- und /oder Prägeeinrichtung mit dem Obertisch in seiner untersten Position

The invention will be explained in more detail with reference to an embodiment. It show in a schematic representation

Fig. 1

a flatbed sheet punching and / or embossing machine

Fig. 2a

the punching and / or embossing device according to the invention with the upper table in its uppermost position

Fig. 2b

the punching and / or embossing device according to the invention with the upper table in its lowest position

In FIG. 1 the basic structure of a sheet punching and embossing machine 100 for punching, breaking and depositing sheets of paper, cardboard and the like is shown. The punching and embossing machine 100 has a feeder 1, a punching station 2, a breaking station 3 and a boom 4, which are supported and enclosed by a common machine housing 5.

The sheets 6 are separated by a feeder 1 from a stack, fed to the sheet transport system 7 and gripped by gripper bars of a gripper carriage 8 grippers at its front edge and intermittently in the sheet transport direction B through the various stations 2, 3 and 4 of the punching and embossing machine 100th pulled.
The sheet transport system has 7 more gripper carriage 8, so that multiple sheets 6 can be processed simultaneously in the various stations 2, 3 and 4. The gripper carriage 8 can be driven by an electromagnetic linear drive with traveling wave motors in an alternative embodiment.

The punching station 2 consists of a lower crucible, a so-called. Under table 9, and an upper crucible, a so-called. Obertisch 10. The upper table 10 is mounted vertically reciprocable and provided with punching and / or Rillmessern. The lower table 9 is fixedly mounted in the machine frame and provided with a counter plate to the punching and Rillmessern. When embossing, embossing tools, in particular in the form of so-called embossing dies, are used instead of the punching and scoring tools. This punching station 2, also referred to as punching and / or embossing device is in the FIGS. 2a and 2b shown in more detail.

The gripper carriage 8 transports the sheet 6 from the punching and embossing station 2 in the subsequent breaking station 3, which is equipped with breakout tools. In the break-out station 3, the unwanted pieces of waste are pushed out of the sheet 6 downwards by means of the break-off tools, whereby the waste pieces 11 fall into a carriage-like container 12 inserted below the station.

From the breaking station 3, the sheet 6 enters the boom 4, where the sheet 6 is either simply stored, or at the same time there is a separation of the individual benefits. The boom 4 may also include a pallet 13, on which the individual sheets 6 are stacked in the form of a stack 14, so that after reaching a certain stack height, the pallets 14 are moved away with the stacked sheets 6 from the field of punching and embossing machine 100 can.

How out FIG. 2a it can be seen, the lower table 9 is suspended by means of columns with tie rods 22 on the yoke 20. The upper table 10 and the eccentric shaft 24 are also based against the yoke 20 (not shown). The yoke 20 is suspended from side walls 21 of the punching and / or stamping device 2. The side walls 21 are connected to a foundation 23.

The eccentric shaft 24 of the punching and / or stamping device 2 comprises eccentric shafts 25, which rotate about axes 26. In the presentation of Fig. 2a is the upper table 10 in its top dead center, ie its highest position. To adjust the punching or embossing 25 adjusting wedges 28 are provided between the upper table 10 and eccentric shafts.

Vibrations of the lower table 9 in the lateral direction, which are e.g. can be caused by minimal unevennesses of the foundation, are by bending bar 29 mounted between the lower table 9 and a respective side wall 21, e.g. designed as leaf springs prevented.

In Fig. 2b the force situation is shown at the moment in which the upper table 10 strikes the lower table 9 approximately in the sheet transport plane E. That is, the upper table 10 is in its bottom dead center, ie its lowest position. The upper table 10 generates when striking the lower table 9 a force pulse, a so-called punched punch S. The power flow of this punching stroke S is as follows: the forces are passed through the lower table 9 in the columns 22 with tie rods and so in the yoke 20. On the other hand, the punching stroke S acts on the yoke 20 via the upper table 10 and the eccentric shaft drive 24 and causes a force impulse on the yoke 20, a so-called expansion A. The punching and / or embossing device 2 is designed such that the force pulses of punching stroke S and expansion A almost neutralize each other and therefore hardly vibrations on the suspension points 27 of the yoke 20 are transmitted to the side walls 21 , This also vibration entries in the foundation 23 are low, so that the foundation 23 may be of compact design.

LIST OF REFERENCE NUMBERS

1

investor

2

Punching station (punching and / or embossing device)

3

stripping

4

boom

5

Machine housing / machine frame

6

bow

7

Sheet transport system

8th

gripper carriages

9

under table

10

overtable

11

trimmings

12

dare

13

palette

14

delivery pile

15

Control with interface and input devices

16

feed

20

yoke

21

Side wall

22

Pillar with tie rod

23

foundation

24

Exzenterwellenantrieb

25

eccentric shaft

26

axis

27

suspension

28

adjusting wedges

29

Bending beam (leaf spring)

100

Sheet punching and embossing machine

B

Sheet transport direction

e

Sheet transport plane

S

Punching stroke (force impulse)

A

Extension (force impulse)

Claims (9)

1. Diecutting and/or stamping/embossing device (2) for a sheet-fed diecutting and/or stamping/embossing device (100) for diecutting and/or stamping/embossing sheets (6) made of paper, cardboard, synthetic materials and the like, including a machine frame (5), a lower table (9) and an upper table (10), the lower table (9) being immovable and the upper table (10) being vertically movable by means of a drive (24),
   characterized in
   that the lower table (9) is fixed to a cross beam (20) by means of connecting elements (22), that the drive (24) and the upper table (10) are supported against the cross beam (20), and that the cross beam (20) is suspended on the machine frame (5).
2. Diecutting and/or embossing/stamping device according to Claim 1,
   characterized in
   that the drive is embodied as an eccentric shaft drive (24).
3. Diecutting and/or embossing/stamping device according to one of the preceding claims,
   characterized in
   that the machine frame (5) includes side walls (21) on which the cross beam (20) is suspended.
4. Diecutting and/or embossing/stamping device according to one of the preceding claims,
   characterized in
   that four connecting elements (22) are provided.
5. Diecutting and/or embossing/stamping device according to one of the preceding claims,
   characterized in
   that the connecting elements are columns (22) with tie rods.
6. Diecutting and/or embossing/stamping device according to one of the preceding claims,
   characterized in
   that the diecutting and/or embossing/stamping force is adjustable by means of wedges (27) that are part of the diecutting and/or embossing/stamping device (2) and are in particular located between eccentric shafts (25) and upper table (10).
7. Diecutting and/or embossing/stamping device according to one of the preceding claims,
   characterized in
   that the mass of the lower table (9) corresponds to a multiple of the mass of the upper table (10), in particular to twice or four times the mass of the upper table (10).
8. Diecutting and/or embossing/stamping device according to one claims 3-7,
   characterized in
   that between the lower table (9) and a respective side wall (21) at least one respective bending beam (29) is provided.
9. Sheet-fed diecutting and/or embossing/stamping machine (100) including a diecutting and/or embossing/stamping device (2) according to one of the preceding claims.

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