EP2397285B1 - Stamping and/or embossing station of a sheet stamping machine - Google Patents

Description

The invention relates to a punching and / or embossing station according to the preamble of claim 1 and further to a flatbed sheet punching and / or embossing machine according to claim 9.

description

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, to which grippers are fixed, which grasp the arches 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 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 addition to the sheet punching and embossing machines described above with circulating chains for transporting the gripper carriage goes out of the DE 20 2007 012 349 U1 a sheet punching and embossing machine, the gripper carriage are driven at their outer ends by at least one linear drive. The linear drive is designed as an electric linear drive with traveling wave motors. In such a sheet punching and embossing machine different gripper carriages can be moved at the same time at different speeds.

For an exact and high-quality punching it is necessary that the cutting and scoring tools are positioned relative to the counter tools. The DE 195 16 073 A1 describes a punching apparatus having an upper positive mold and a lower negative mold. The upper mold consists of a frame in which the punching and Rillmesser holding support plate is held by adjusting and retaining screws. The lower mold consists of a metal plate, which is the negative counterpart to the Punching and Rillmessern forms. The device has adjustable stops, which serve to position the upper and / or lower mold.

The EP 0 756 919 B1 describes a device for punching with an upper and a lower crucible. The one crucible carries punching knife, the other crucible a counter-punching plate. The counter-punching plate comprises a fixedly connected to the crucible bottom plate and also a thin top plate. The top plate is adjustable relative to the lower plate via at least one guide and drive element. By means of at least one locking element, the two plates are fixed relative to each other.

The US 5,730,039 describes a device for adjusting the position of a punching plate in a punching machine. The device comprises a punching plate and a bearing plate. The bearing plate is provided with two adjusting devices, which each comprise eccentric. The punching plate has two recesses into which the adjusting devices engage. By rotating the eccentric adjusting the punching plate is moved relative to the bearing plate.

The EP 1 153 716 B9 describes a punching machine with a punching station, which comprises a stamped sheet metal. The stamping sheet rests on a support plate and is held by moving stirrups. The movable brackets have two positions: a first clamping position, in which prevents the displacement of the punching plate on the punching plate and a rest position, in which the displacement of the punching plate on the support plate is made possible. The position of the support plate relative to the lower crucible can be changed horizontally via adjusting means.

The DE 10 2008 008 112 A1 shows an apparatus for punching sheet material of paper, paperboard and the like with upper and lower crucibles. The upper crucible is connected to a first positive punch and / or knurl mold and the lower crucible is connected to a second negative die Form, which comprises a frame held in a counter-supporting plate connected. The counter-mold is connected to the counter-form bearing plate, in particular screwed. The frame is connected by means of a clamping mechanism with the lower crucible, and is together with the counter-supporting plate by means of an adjustment relative to the lower crucible horizontally adjustable, in particular motor.

A device for punching band-shaped and arcuate material according to the preamble of claim 1 is known from the published patent application DE 196 30 369 A1 ,

task

Object of the present invention is to provide a punching and / or embossing station, which allows a simple and accurate adjustment of the lower tool of a punching and / or embossing station with greater accuracy and at least reduces the disadvantages of the prior art. This object is achieved by a punching and / or embossing station with the features of claim 1 and by a punching machine according to claim 9.

The punching and / or embossing station according to the invention is suitable for a flatbed sheet punching and / or embossing machine. It has an upper table with an upper tool and a lower table with a lower tool. In this case, the upper tool punching and / or Rillmesser and / or embossing dies and the lower tool is designed as a plate-shaped counter tool to the upper tool. The lower tool is connected by means of a frameless holding and positioning directly to the table. The holding and positioning device has an adjusting device for direct alignment of the lower tool relative to the upper tool in the three degrees of freedom of resting on the lower table tool, d. H. in the machine direction, transverse to the machine direction and as rotation in the plane of the tool.

The holding and positioning device is a frameless solution, ie the lower tool is connected directly to the lower table without a frame and there is a direct adjustment of the lower tool. Since the tool is not included in a frame, no deformation of the frame can occur during the adjustment. Thus, the tool can be positioned with greater accuracy.

In an advantageous development of the punching and / or embossing station according to the invention, the lower tool is positively and non-positively connected to the holding and positioning device. In a preferred embodiment, the holding and positioning device is attached to the lower table and has at least one stop body and at least one clamping body, which are arranged in particular on opposite sides of the punching and / or embossing station, for. B. on the drive side and the operator side. The lower tool in turn has recesses, each stop body and each clamping body is associated with a recess and the recess at least partially receives the stopper body and the clamping body. The lower tool can have a punching and / or scoring plate.

In an advantageous development of the stamping and / or embossing station, the at least one stop body and the at least one clamping body are each displaceable in the machine direction of the punching and / or embossing station and the at least one stop body is displaceable transversely to the machine direction of the punching and / or embossing station. The at least one clamping body can be moved from a release position, in which the lower tool is freely movable, into a clamping position, in which the lower tool is fixed, d. H. is held. Likewise, the clamping body can be moved from a clamping position into a release position. By this embodiment, both an accurate alignment of the lower tool and a secure fixing of the aligned lower tool is possible in an advantageous manner.

In an advantageous development, the holding and positioning device has at least one cross table, which is also referred to as XY table and each has two single-axis linear guide systems. A respective cross table is assigned to a stop body or a clamping body and thus serves to position the stop body or of the clamping body. As an alternative to cross tables, four joints can also be used. The holding and positioning of the punching and / or embossing station according to the invention has at least one four-bar linkage, also referred to as a four-link coupling gear, on. A respective four-bar linkage is included associated with a stop body or a clamping body and serves to position the stop body or of the clamping body. It when the four-bar linkage is arranged such that a pivoting movement of the four-bar mechanism causes a displacement of the associated stopper body transversely to the machine direction of the punching and / or embossing station is particularly advantageous. By means of the displacement of stopper body and clamp body, the lower tool can be aligned.

There are holding and positioning devices are conceivable, which have exclusively cross tables, which have only four joints or which have both at least one cross table and at least one four-bar linkage, for positioning the stopper body and the clamping body. In an advantageous development of the cross table and / or the four-bar linkage drives, in particular controllable electric motors for positioning the stopper body or the clamping body.

The subject matter of the invention is also a flatbed sheet punching and / or embossing machine which has a punching and / or embossing station as described above.

Further, it is advantageous if the sheet punching and embossing machine has separate drives of the sheet transport system and the individual processing stations. The drive of the sheet transport system can be e.g. be designed as electric linear drive with alternating field motors.

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 Draufsicht des Unterwerkzeuges und seine Ausrichtung
• Fig. 2a eine erste Ausführungsform der Verstelleinrichtung mit Viergelenken
• Fig. 2b die Ausführungsform aus Fig. 2a, wobei das Unterwerkzeug freigegeben ist
• Fig. 3a eine Ansicht einer zweite Ausführungsform der Verstelleinrichtung mit Kreuztischen
• Fig. 3b eine Draufsicht auf die zweite Ausführungsform von Fig. 3a
• Fig. 4a eine Detailansicht des Viergelenks aus den Fig. 2
• Fig. 4b eine Schnittdarstellung des Viergelenks aus Fig. 4a
• Fig. 5 eine Flachbett-Bogenstanz- und/oder -prägemaschine

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

• Fig. 1 a plan view of the lower tool and its orientation
• Fig. 2a a first embodiment of the adjusting device with four joints
• Fig. 2b the embodiment of Fig. 2a , wherein the lower tool is released
• Fig. 3a a view of a second embodiment of the adjustment with cross tables
• Fig. 3b a plan view of the second embodiment of Fig. 3a
• Fig. 4a a detailed view of the four-bar linkage from the Fig. 2
• Fig. 4b a sectional view of the four-bar linkage Fig. 4a
• Fig. 5 a flatbed sheet punching and / or embossing machine

In FIG. 5 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. From one side, the so-called operator side, the processing stations 2, 3, 4 are accessible; on the opposite side, the so-called drive side, there is the drive train of the sheet punching and embossing machine 100.

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 7 has a plurality of gripper carriages 8, so that a plurality of sheets 6 can be processed simultaneously in the various stations 2, 3 and 4. The gripper carriage 8 can be driven by a chain drive or in an alternative embodiment by an electromagnetic linear drive with traveling wave motors.

The punching station and / or embossing station 2 consists of a lower crucible, a so-called. Subtable 9, and an upper crucible, a so-called. Obertisch 10. The upper table 10 is vertically reciprocally mounted and provided with punching and Rillmessern (upper tool 30). The lower table 9 is fixedly mounted in the machine frame and with a Counter plate provided to the punching and Rillmessern (lower tool 20). Alternatively, the upper table 10 fixed and the lower table 9 may be moved. In embossing, embossing tools, in particular in the form of so-called embossing dies, are used instead of the punching and scoring tools.

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 of each sheet 6. 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 pallet 13 can be moved away with the sheet stack 14 from the field of punching and embossing machine 100 ,

The design of the punching and / or embossing station 2 and in particular of the holding and positioning device 40 for holding and positioning the lower tool 20 is on the basis of Fig. 1 to 4 described in more detail.

FIG. 1 shows the lower tool 20 of a punching and / or embossing station 2 (not shown), wherein the machine direction and sheet transport direction is designated B. On opposite sides of the lower die 20 each have a recess 21. In the illustration of Fig. 1 represents the right side of the operator side BS and the left side of the drive side AS. In the recess 21 on the operator side engages a clamping body 43, which allows by displacement 1 in or counter to the machine direction B circumferential adjustment. Furthermore, the clamping body 43 can perform a clamping movement k in order to clamp the lower tool 20 and thus fix it. In the drive-side recess 21 engages a stopper body 42, which by a displacement 1 in or against the Machine direction B allows a circumferential adjustment and by shifting q transversely to the machine direction B lateral adjustment of the lower tool 20. As it turned out FIG. 1 results, the lower tool 20 is not included in a frame; Rather, the adjustment and alignment of the lower tool 20 by the attacking directly on the lower tool 20 stop body 42 and clamping body 43. According to the illustration of Fig. 1 in each case a clamping body 43 and a stopper body 42 is provided. In alternative embodiments, not shown, however, a plurality of stop bodies 42 and of clamping bodies 43 may be provided.

The structure of the holding and positioning device 40 will be described below with reference to the further figures:
In the FIGS. 2a and 2b a first embodiment is shown, in which the adjusting device 41 of the holding and positioning device 40 four joints 45 has. An arranged on the left side four-bar 45 serves to adjust the stopper body 42, a arranged on the right side four-bar serves to adjust the clamping body 43. The clamping body 43 is further connected to a clamping mechanism 48 which is driven by a pneumatic cylinder 49.6. As shown by Fig. 2a If the lower tool 20 is located on the undertable 9 and is fixed in its position by the non-positively and positively engaging in the lower tool 20 stopper body 42 and the clamping body 43. In order to enable positioning of the lower tool 20, the clamping body 43 of his in Fig. 2a shown clamping position by a clamping movement k in his in Fig. 2b shown release position can be spent. The thus released lower tool 20 can by the in Fig. 1 indicated displacement movements 1 and q relative to the upper tool 30 (not shown) are aligned.

The design of the holding and positioning device 40 with four-bar 45 is in the FIGS. 4a and 4b shown in more detail. A four-bar link 45 has a first coupling 45.1 and a second coupling 45.2. The stopper body 42 is connected at a pivot point 49.4 with the coupling 45.1 and at another pivot point 49.4 with the coupling 45.2. A respective coupling 45.1 and 45.2 further has a location point 49.5. The end of a Coupling 45.2 can be moved by a driven spindle 49.1. The spindle 49.1 is driven by a drive 47 for lateral adjustment, for example a controllable electric motor. The pivotal movements of the coupling 45.2 of the four-bar link 45 is converted into a transverse displacement movement q of the stopper body 42, so that the stopper body 42 causes a transverse displacement of the lower tool 20 on the lower table 9. Fig. 4b is a sectional view through the coupling 45.1 and the stopper body 42 and serves to illustrate the longitudinal displacement of the stop body 42. The stopper body 42 is rotatably mounted at the positions 49.4 in the coupling 45.1. At its lower end, the coupling 45.1 is connected in a press fit or press fit 49.7 with a rod 49.8. The rod 49.8 is rotatably mounted at two bearing points 49.5. At one end of the rod 49.8 engages a pin 49.2, which is moved by a drive 46 for circumferential adjustment and the displacement of the rod 49.8 and thus the coupling 45.1 and the stopper body 42 causes in the direction 1 against the force of a spring 49.3.

The adjustment of a clamping body 43, as in the Fig. 2a and 2b shown, can be done by means of an analog four-bar 45.

In the Fig. 3a and 3b an alternative embodiment of the holding and positioning device 40 is shown. The adjusting device 41 of the holding and positioning device 40 has two cross tables 44. The cross table 44 on the right side is associated with the clamping body 43 and allows both a clamping movement k and a sliding movement 1 of the clamping body 43. The clamping body 43 engages in a recess 21 in the lower tool 20, so that a displacement k, 1 of Clamping body 43 also causes a displacement of the lower tool 20. In the introduced on the opposite side of the lower tool 20 recess 21 engages a stopper body 42 a. This stop body 42 is also associated with a cross table 44. The cross table 44 allows a sliding movement 1 and q of the stopper body 42 and thus a displacement of the lower tool 20. A respective cross table 44 has a drive 46, z. B. a controlled electric motor, for adjusting stopper 42 and clamping body 43 in the machine direction B (circumferential adjustment 1). A respective cross table 44 has another drive 47, z. B. a controlled electric motor, for positioning the stopper body 42 and the clamping body 43 transversely to the machine direction B (side adjustment q).

LIST OF REFERENCE NUMBERS

1

investor

2

Punching and / or embossing station

3

stripping

4

boom

5

machine housing

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

lower tool

21

recess

30

upper tool

40

Holding and positioning device

41

adjustment

42

stop body

43

clamping bodies

44

cross table

45

four joint

45.1

paddock

45.2

paddock

46

Drive circumferential adjustment

47

Drive side adjustment

48

clamping mechanism

49.1

spindle

49.2

pen

49.3

feather

49.4

swivel

49.5

bearing point

49.6

pneumatic cylinder

49.7

Press-fit / force fit

49.8

pole

100

Sheet punching and embossing machine

AS

driving side

BS

operator side

B

Sheet transport direction / machine-direction

e

Sheet transport plane

1

Displacement in or against the machine direction (circumferential adjustment)

q

Transverse to machine direction (side adjustment)

k

clamping movement

Claims (9)

1. A punching and/or embossing station (2) for a flat-bed sheet punching machine and/or flat-bed embossing machine (100) comprising an upper platen (10) with an upper tool (30) and a lower platen (9) with a lower tool (20),
   wherein the upper tool (30) comprises punching knives and/or creasing knives and/or embossing plates and wherein the lower tool (20) is designed as a plate-shaped counter-tool to the upper tool (30),
   characterized in that
   the lower tool (20) is directly coupled to the lower table (9) by means of a frameless supporting and positioning means (40) and rests on the lower platen (9) and in that the supporting and positioning means (40) comprises an adjusting means (41) for directly positioning the lower tool (20), and
   that the supporting and positioning means (40) is attached to the lower table (9) and has at least one stop body (42) and at least one clamping body (43), and that the lower tool (20) has recesses (21), wherein a recess (21) is assigned to each stop body (42) and each clamping body (43).
2. A punching and/or embossing station according to claim 1,
   characterized in that
   the lower tool (20) is positively and force-fittingly attached to the supporting and positioning means (40).
3. A punching and/or embossing station according to one of the preceding claims,
   characterized in that
   the lower tool (20) comprises a punching plate and/or creasing plate.
4. A punching and/or embossing station according to any one of the preceding claims,
   characterized in that
   the at least one stop body (42) and the at least one clamping body (43) are each displaceable (I) in the machine direction (B), and
   that the at least one stop body (42) is displaceable (q) transversely to the machine direction (B), and
   that the at least one clamping body (43) can be brought into a clamping position (k) from a release position and vice versa.
5. A punching and/or embossing station according to any one of the preceding claims,
   characterized in that
   the supporting and positioning means (40) comprises at least one cross table (44), wherein a respective cross table (44) is assigned to a stop body (42) or a clamping body (43) for positioning the stop body (42) or the clamping body (43).
6. A punching and/or embossing station according to any one of claims 1 to 4,
   characterized in that
   the supporting and positioning means (40) comprises at least one four-pivot link (45), wherein a respective four-pivot link (45) is assigned to a stop body (42) or a clamping body (43) for positioning the stop body (42) or the clamping body (43).
7. A punching and/or embossing station according to claim 6,
   characterized in that
   the four-pivot link (45) is arranged such that a pivoting movement of the four-pivot link effects a displacement (q) of the assigned stop body (42) transversely to the machine direction (B).
8. A punching and/or embossing station according to one of claims 5 to 7,
   characterized in that
   the cross table (44) and/or the four-pivot link (45) comprises drives (46, 47), in particular controllable electric motors, for driving these and thereby for positioning the stopper body (42) or the clamping body (43).
9. A flat-bed sheet punching machine and/or flat-bed embossing machine (100) comprising a punching and/or embossing station (2) according to any one of the preceding claims.

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