EP2087972A1 - Device for punching - Google Patents

Abstract

The device has a positive mold provided with a punching and/or grooving blade and connected with an upper cup. A negative mold comprises a vacuum plate (20) and held in a frame (24). A counter mold is screwed with the plate. The frame is connected with a lower cup (9) by a clamping mechanism such as pneumatic cylinder (21). The frame is horizontally movable together with the plate relative to the lower cup by an adjusting device (23), where the plate supports the counter mold that is formed by a punching sheet. An independent claim is also included for a method for punching a sheet made of paper or cardboard, in a sheet punching and/or embossing machine.

Description

The invention relates to a punching device according to the preamble of claim 1 and further to a punching device according to the preamble of claim 10.

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 still has lateral Trolleys which are connected to endless chains of the transport system and whereby the gripper carriages are moved through 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 out of the cyclically guided between the table surface arches punched out 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 provided for this purpose Nutzentrenneinrichtung.

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 forms the negative counterpart to the punching and Rillmessern. 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.

Object of the present invention is to provide a device for punching, which allows a simple and exact adjustment of a counter-mold comprehensive form, the mold after a job change is again easy to be brought into their zero position.

This object is achieved by a punching device having the characterizing features of claim 1 and by a punching device having the characterizing features of claim 10.

The inventive device for punching sheet material of paper, cardboard and the like has an upper and a lower crucible. A first positive mold, which carries punching and / or knives, is connected to the upper crucible. A second negative mold comprising a counter-mold is connected to the lower crucible. The counter-mold is connected to a plate, preferably screwed, and counter-mold and plate are held in a frame. This frame is connected via a clamping mechanism with the lower crucible. About an adjustment of the frame together with the counter-mold carrying plate and the counter-mold are adjusted horizontally relative to the lower crucible. The adjustment is preferably actuator or motor.

In a preferred embodiment, the counter-mold is formed by a stamped sheet. In a preferred development of this embodiment, the counter-form bearing plate is formed by a vacuum plate. The stamped sheet is bolted to this and is pressed by a vacuum to the vacuum plate. The vacuum is generated by a known to the expert vacuum generator. Advantageously, the vacuum plate is made substantially thicker than the stamped sheet and represents the supporting structure of the punching sheet. The vacuum plate usually has a thickness of about 4 to 10 mm, the stamped sheet has a thickness of about 1 mm.

In an advantageous development, the clamping mechanism comprises at least two actuators which press the frame onto the lower crucible. The actuators can advantageously be designed as pneumatic cylinders. Particularly advantageous is the use of four pneumatic cylinders that ensure uniform contact pressure. As an alternative to the pneumatic cylinders, hydraulic cylinders or electric motors with driven spindles can also be used.

In an advantageous development of the invention, the adjusting device has at least two actuators for adjusting the frame with plate and counter-mold in the horizontal plane of the frame. In this plane, a two-dimensional coordinate system is spanned. The first actuator causes an adjustment of the frame in the direction of the first axis and the second actuator causes an adjustment of the frame in the direction of the second axis of the coordinate system. It is particularly advantageous to replace an actuator by two actuators, which each act on the outer end of the frame and are driven in synchronism with one another. This ensures that the frame is moved parallel to the axis and does not rotate. In the event that a defined rotation of the frame is to be achieved, the actuators of the actuator pair are not synchronized, but operated asynchronously to each other. In particular, controllable electric motors are suitable as actuators.

In a particularly advantageous embodiment of the device for punching the plate and the counter-mold is clamped by means of a clamping mechanism with the frame. The clamping mechanism has at least one fixedly attached to the frame clamping nose and at least one of the fixed clamping lug opposite arranged releasable clamping lug. The detachable clamping nose can be operated manually, pneumatically, hydraulically or by motor. Depending on the size of plate, counter-shape and frame as well as the forces acting, it may be useful to perform the clamping mechanism with a plurality of fixed and releasable clamping lugs.

In an advantageous embodiment of the device for punching this has a control device for driving the clamping mechanism and the adjusting device.
This allows the actuation of the actuators for clamping the frame with the lower crucible and the actuation of the actuators for adjusting the frame with plate and counter-shape in the horizontal plane of the frame.

The invention further includes an apparatus for punching sheet paper, paperboard and the like with upper and lower crucibles in an alternative embodiment. The device comprises a first positive mold comprising a punch and / or knife carrying a blade held in a first frame, and / or a second negative mold comprising a plate held in a second frame and carrying a counter-mold. The counter-mold is connected to the counter-form bearing plate, advantageously bolted. The first frame is detachably connected to one of the crucibles, in particular the upper crucible, and horizontally adjustable by means of a first adjusting device relative to this crucible and / or the second frame is detachably connected to the other crucible, in particular the lower crucible, and by means of a second Adjustment relative to this crucible horizontally adjustable. So it can either only one of the two forms or both forms can have an adjustable frame. The adjustment is advantageously in all cases aktuatorisch.

This second embodiment of the device for punching can be developed analogously to the first embodiment for punching, as described above.

For equipping the device for punching with tools, a punching and / or scoring knife comprehensive form is connected to the upper crucible. The counter-form screwed with the counter-mold plate is inserted into the lower frame. Subsequently, the device for punching can be set up: In a first step, the tension of the frame and crucible is solved by the clamping mechanism is released. For this purpose, the actuators are controlled by the control device accordingly. In a second step, the horizontal displacement of the frame with plate and counter-mold relative to the punching and / or scoring knives of the upper positive mold by the actuators of the adjuster are driven accordingly. Once the counter-mold is positioned relative to the punching and / or scoring knives, in a third step, the clamping of the frame and crucible by activating the clamping mechanism. For this purpose, the actuators are controlled by the control device accordingly.

The invention also includes a sheet punching and embossing machine comprising a punching apparatus in one of the embodiments described above.

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 designed in particular as an 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 Bogenstanz- und -prägemaschine

Fig. 2

die erfindungsgemäße Vorrichtung zum Stanzen in einer räumlichen Darstellung

Fig. 3

eine Draufsicht von Fig. 2

Fig. 4

einen Schnitt von Fig. 3 entlang 4-4

Fig. 5

das Detail 5 aus Fig. 4

Fig. 6

eine Ansicht von unten auf den oberen Tiegel mit Werkzeug

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

Fig. 1

a sheet punching and embossing machine

Fig. 2

the inventive device for punching in a spatial representation

Fig. 3

a top view of Fig. 2

Fig. 4

a cut of Fig. 3 along 4-4

Fig. 5

the detail 5 off Fig. 4

Fig. 6

a bottom view of the upper crucible with tool

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 with a device for punching, 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.
As can be seen, 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 punching 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 mounted vertically moved back and forth and provided with punching and Rillmessern. The lower table 9 is fixedly mounted in the machine frame and provided with a counter plate to the punching and Rillmessern.

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 breaking station 3, the unwanted pieces of waste are pushed out of the sheet 6 downwards with the aid of the stripping tools, whereby the waste pieces 11 fall into a container-like carriage 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.

Fig. 2 shows a part of the device according to the invention for punching in a spatial representation. A vacuum plate with punching plate 20 is held by a clamping mechanism 22 in a frame 24. The frame 24 is adjustable via an adjusting device 23 in the plane of the frame 24. By a clamping mechanism which comprises four pneumatic cylinders 21, the frame 24 is pressed against the lower table 9. The mode of operation of the adjusting device 23 results from the top view in FIG Fig. 3 ,

The adjusting device 23 comprises three electric motors 23.1, 23.2 and 23.3. In the plane of the frame 24, a two-dimensional Cartesian coordinate system is spanned, which has the axes x and y. The electric motors 23.1 and 23.2 are synchronized with each other and cause an adjustment, i. Displacement of the frame 24 with the vacuum plate with punching plate 20 parallel to the axis x. The electric motor 23.3 causes an adjustment, i. Displacement of the frame 24 with vacuum plate with punching plate 20 parallel to the axis y. In non-synchronized operation of the electric motors 23.-1.23.2 and 23.3, the frame 24 can be adjusted obliquely to the x-axis, d. H. the punching plate 24 can undergo a rotation.

The clamping of the vacuum plate with punching plate 20 in the frame 24 results from a sectional view in Fig. 4 , The frame 24 has on one side via a fixed clamping nose 22.2 and on the opposite side via a detachable clamping nose 22.1. The mechanism for releasing and actuating the clamping nose 22. 1 is shown in detail in FIG Fig. 5 shown. When equipping the device for punching with a vacuum plate with stamped sheet 20, this is inserted into the frame 24, at its one end under the fixed Clamping 22.2 pushed and gripped at its opposite end by the movable clamping lug 22.1 and clamped.

For better clarity, the connection of the electric motors 23.1, 23.2 and 23.3 and the pneumatic cylinder 21 to the control device 15 in the FIGS. 2 to 5 not shown. The connection of the vacuum plate with punching plate 20 with the vacuum generator 17 is in the FIGS. 2 to 5 for the sake of clarity not shown.

Fig. 6 shows a representation analogous to Fig. 3 , From this, the adjustment of a located in a frame 24 punching and / or Rillmesser carrying plate 25 is shown relative to the upper crucible 10.

LIST OF REFERENCE NUMBERS

1

investor

2

punching station

3

stripping

4

boom

5

machine housing

6

bow

7

Sheet transport system

8th

gripper carriages

9

under table

10

Upper table with punching and / or knives

11

trimmings

12

dare

13

palette

14

delivery pile

15

Control with interface and input devices

16

feed

17

Vacuum generator

20

Vacuum plate with stamped sheet

21

pneumatic cylinder

22

clamping mechanism

22.1

detachable clamping nose

22.2

fixed clamping nose

23

adjustment

23.1

first electric motor

23.2

second electric motor

24

frame

25

Punching and / or scoring knife carrying plate

100

Sheet punching and embossing machine

B

Sheet transport direction

e

Sheet transport plane

Claims (13)

Apparatus for punching (2) sheet-like material (6) of paper, cardboard and the like with an upper (10) and a lower (9) crucible, having a first positive punching and / or knifing knife, which is connected to the upper crucible (10) is connected, and with a second negative mold, which comprises a in a frame (24) held, a counter-form carrying plate (20), wherein the counter-mold connected to the plate, in particular screwed,
characterized,
in that the frame (24) is connected to the lower crucible (9) by means of a tensioning mechanism (21), and in that the frame (24), together with the counter-supporting plate (20), is adjusted relative to the lower crucible (23) by means of an adjusting device (23). 9) is horizontally adjustable. Punching device according to claim 1,
characterized,
that the adjustment is actuarial. Punching device according to one of claims 1 to 2,
characterized,
that the countershape is formed by a stamped sheet metal. Punching device according to claim 3,
characterized,
in that the counter-form bearing plate (20) is formed by a vacuum plate, the stamped sheet is screwed thereto, and is pressed by a vacuum generated by means of a vacuum generator (17) to the vacuum plate. Punching device according to claim 4,
characterized,
that the vacuum plate is designed substantially thicker than the stamped sheet. Punching device according to one of claims 1 to 5,
characterized,
in that the clamping mechanism comprises at least two actuators, in particular two pneumatic cylinders (21), which press the frame (24) onto the lower crucible (9). Punching device according to one of claims 1 to 6,
characterized,
in that the adjusting device (23) has at least two actuators, in particular two electric motors (23.1, 23.2, 23.3), wherein the adjustment of the frame (24) with plate and countershape (20) in the horizontal plane of the frame (24), in which a two-dimensional coordinate system is spanned by the first actuator (23: 1, 23.2) in the direction of the first axis (x) and by the second actuator (23.3) in the direction of the second axis (y) of the coordinate system. Punching device according to one of claims 1 to 7,
characterized,
in that the plate and the counter-mold (20) are clamped to the frame (24) by means of a clamping mechanism (22) and the clamping mechanism (22) has at least one clamping nose (22.2) fixedly attached to the frame (24) and at least one of the fixed clamping lugs releasable clamping nose (22.1) has. Punching device according to claims 6 and 7,
characterized,
in that the punching device has a control device (15) for actuating the clamping mechanism (21) and the adjusting device (23). Apparatus for punching (2) sheet material (6) of paper, paperboard and the like with upper (10) and lower (9) crucibles, having a first positive die, which has a punched and / or held in a first frame Knife-carrying plate comprises, and / or with a second negative mold, which in a second frame (24) held, a counter-plate carrying (20), wherein the counter-mold is connected to the plate, in particular screwed,
characterized,
that the first frame with one of the crucible (9, 10), in particular the upper crucible (10), detachably connected and relative to this crucible (9, 10) by means of a first adjustment device is horizontally adjustable, and / or that the second frame ( 24) with the other crucible (10, 9), in particular the lower crucible (9), is detachably connected, and by means of a second adjusting device (23) relative to this crucible (10, 9) is horizontally adjustable. Punching apparatus according to claim 10,
characterized,
that the adjustment takes place in each case actuator. Sheet punching and / or embossing machine (100) with a punching device (2) according to one of the preceding claims. A method of setting up a punching apparatus according to claim 9, comprising the following steps: a. Loosening of the clamping mechanism (21) for releasing the tension of the frame and crucible by corresponding activation of the actuators by the control device (15) b. Actuation of the actuators of the adjusting device (23) by the control device (15) to move the frame (24) with plate and counter-mold (20) relative to the punching and / or knives of the positive mold horizontally. c. Activation of the clamping mechanism (21) for clamping the frame (24) and crucible (9) by appropriate control of the actuators (21) by the control device (15).

Images