EP2479011B1 - Adapter unit for receiving stamping tools - Google Patents

Description

The invention relates to an adapter unit according to the preamble of claim 1 for receiving punching tools.

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 used for punching, embossing, breaking, if necessary. Nutzentrennen and storing sheets of paper, cardboard and the same be, 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.

The DE 102 51 780 A1 describes a sheet punching and embossing machine with a punching device. It is provided a frame for receiving a fitted with punching and knurling knives supporting plate, wherein the support plate, also commonly referred to as a punching tool, can be clamped by means of hydraulically actuated clamping elements. Such a frame is also referred to as a quick-release frame or closing frame. A disadvantage of such a closure frame is that only tools of a certain format, namely the nominal size, can be held by the latter. However, since the production of punching and / or stamping tools is complex and expensive, it is of interest to be able to use tools whose size differs from the nominal format. Newer sheet punching and / or embossing machines increasingly have a larger nominal size compared to older machines. For smaller or only occasionally repeating orders, it is not economical to have a reworked to the larger nominal size machining tool. One already existing tools should continue to be used on the new larger format machine.

The DE 195 16 074 B4 discloses an apparatus for punching with a frame for holding a tool composed of various stamped parts. For this purpose, a sliding clamping bar and slidable telescopic rods are arranged in the frame. With these, the individual tools are connected via fixing elements. A disadvantage of such a device is that results in an uneven punching pressure distribution over the entire crucible surface. Thus, punching forces can be transmitted only in the area of the frame where individual tools are located. The unequal punching pressure distribution results in a high load on the cutting edges as well as a reduced cutting quality.

task

It is therefore an object of the present invention to further develop the known state of the art and to at least partially solve the abovementioned problems.

This object is achieved by an adapter unit having the features of claim 1.

The adapter unit according to the invention has a first recess for alternative recording of punching and / or stamping tools of different format in the tool holder of a punching and / or embossing station. The stamping and / or embossing tool may comprise a plate element with active elements such as punching knives and / or knives and / or embossing dies. The adapter unit has a plurality of telescopic clamping elements for holding the punching and / or embossing tool. Due to the telescoping of the clamping elements is ensured in an advantageous manner that the tool may have different dimensions. According to the invention, the adapter unit has at least one further recess in which a plate can be received, which is equipped with force transmission elements. These punching or embossing force transmission elements serve to transmit the pressing force of the crucible of the punching and / or embossing station and thus contribute to one more uniform distribution of the punching and / or stamping force. The adapter unit corresponds in its external dimensions to the nominal format of the punching and / or embossing station. It is manufactured in particular from a plate-shaped element made of a stiff, kink-resistant and lightweight material, such as aluminum or fiber-reinforced plastic (eg GFK or CFK).

In an advantageous development of the adapter unit according to the invention, at least one plate equipped with punching force transmission elements is part of the adapter unit. The plate can be designed for example as a wooden plate.

In a particularly advantageous and therefore preferred embodiment, the force transmission elements are punching blades. Even if no machining of a sheet of paper, cardboard, plastic and the like to be processed in the punching and / or embossing station is desired at the positions of the punching force transmission elements, the use of punching knives represents a cost-effective variant. Thus, the plates equipped with punching knives to be commissioned by the stamping and stamping tool manufacturers. As an alternative to the punching blades, however, it is also possible, for example, to use plates or small hard rubber discs as punching force transmission elements.

According to the invention, a respective further recess has at least one locking element for holding the respective plate. This may be, for example, a displaceable or rotatable clamping element, a screw connection, or a tensioning element acting with spring force.

In a particularly advantageous and therefore preferred embodiment, a respective clamping element has a bolt for transmitting a clamping force. This bolt, which can also be referred to as a bump, is in particular made of a high-strength, kink-resistant material such as steel. In the event that the adapter unit is accommodated in a closing frame, the clamping force of the closing frame is transmitted by the bolt to the punching and / or embossing tool located in the first recess. This will keep this safe.

In an advantageous development of the adapter unit according to the invention, a respective clamping element is variable in its length from a first length for clamping a punching and / or embossing tool first format to a second length for clamping a punching and / or embossing tool second format. In an advantageous embodiment, a respective clamping element on a claw coupling with two levels to implement the Längenveränderlichkeit. If the elements of the dog clutch are engaged with each other in the first plane, the clamping element is of a first length; If the elements of the dog clutch are engaged with each other in the second plane, the clamping element is of a second length. As an alternative to this graded length variability of the clamping element and a stepless change in length is possible, for example by providing a thread. An advantage of the use of a stepped adjustability by means of the dog clutch is that for the change in length of the clamping element there is only a small amount of time.

In one embodiment variant of the adapter unit according to the invention, this has a spring pin as a compression spring for holding a respective clamping element. This spring pin prevents a clamping element from slipping out during removal, storage and installation of the adapter unit and is lost. Furthermore, a respective clamping element may comprise a spring, which pulls a respective bolt into a recess in the adapter unit. If no clamping force is applied to a respective bolt from the outside, the spring force of the spring causes the clamping element to release the punching and / or stamping tool and this can be removed from the adapter unit.

In a particularly advantageous and therefore preferred embodiment of the adapter unit, the number of punching force transmission elements on the at least one plate on the number and distribution of active elements (ie punching, Rillmesser, embossing clichés) of a respective punching and / or embossing tool dependent. The number of punching force transmission elements and optionally also their distribution is chosen such that a punching and / or embossing force is approximately evenly distributed over the surface of a crucible of the punching and / or -prägestation. So z. Eg the Line density of steel strips symmetrical evenly distributed over the maximum format, ie the nominal format of the punching and / or embossing station. In order to ensure a uniform distribution of the punching force in this way, a collection of plates with different numbers of punching force transmission elements can be kept in stock, which can be used depending on the configuration of the punching and / or embossing tool in the at least one further recess of the adapter unit.

Alternatively, the at least one plate individually with

Stamping force transmission elements are equipped and this depending on the configuration of the punching and / or embossing tool used.

The described invention and the described advantageous developments of the invention are also in any combination with each other advantageous developments of the invention.

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:

Übersichtsdarstellung einer Flachbett-Bogenstanz- und -prägemaschine mit einer Stanz- und/oder Prägestation

Fig. 2

Draufsicht auf eine erfindungsgemäße Adaptereinheit

Fig. 3a

Detaildarstellung des Klemmelements aus Fig. 2

Fig. 3b und c

Längenveränderlichkeit des Klemmelements

Fig. 4a-c

Auswahl an Platten

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

Fig. 1:

Overview of a flatbed sheet punching and embossing machine with a punching and / or embossing station

Fig. 2

Top view of an adapter unit according to the invention

Fig. 3a

Detail of the clamping element Fig. 2

Fig. 3b and c

Length variability of the clamping element

Fig. 4a-c

Selection of plates

In FIG. 1 is the basic structure of a sheet punching and embossing machine 100 for punching, breaking, Nutzentrennen and storing sheets of paper, cardboard and the like. 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, is the drive train of the sheet punching and embossing machine 100. The processing stations 2, 3, 4 and a sheet transport system 7 are driven by a main drive 17. The control of the machine and the various processing operations via a central machine control 15.

The sheets 6 are separated by a feeder 1 from a stack, aligned on the feed table 16, fed to the sheet transport system 7 and gripped by gripper bridges 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 the punching and embossing machine 100 pulled through.

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, such as in the DE 20 2007 012 349 U1 described.

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 vertically reciprocally mounted and provided with an upper tool 30 with punching and Rillmessern. The upper tool 30 is held by a quick-release frame, a so-called. Locking frame 31. The lower table 9 is fixedly mounted in the machine frame and provided with a counter-plate 20 to the punching and Rillmessern. 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. In addition, hot foil can still be applied during the embossing process.

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 21, 23. In the breaking station 3, the waste pieces 11 which are not required are pushed out of the sheet 6 downward with the aid of the breaking-out tools 21, 23, 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 , In order not to have to stop the machine 100 during the stack exchange, auxiliary stacking devices can be used.

As in Fig. 2 illustrated, the adapter unit 300 is received by a closing frame or quick release frame 31. The outer dimensions of the adapter unit 300 correspond to the nominal size WF1 of the closing frame 31. That is, if no adapter unit 300 is received by the closing frame 31, an unillustrated upper tool 30 of the nominal size WF1 can be supported by the closing frame 31. The adapter unit 300 is connected by screws to the base of the closing frame 31. Also, cylinders or similar elements may be provided (not shown), which clamp the adapter unit 300 in the context of the closing frame 31.

The U-shaped adapter unit 300 has a first recess 301, in which a tool 30 can be accommodated. In addition, the adapter unit 300 has further recesses 302, in which plates 303 provided with punching force transmission elements 304 can be received. The number of further recesses 302 depends on the area of the adapter unit 300 and its stability and is at the discretion of the person skilled in the art. In the Fig. 2 illustrated

Embodiment of the adapter unit 300 has seven such further recesses 302. In four of these recesses 302 plates 303 were used. A respective plate 303 has a plurality of punching force transmission elements 304, which are formed in the illustrated embodiment by punching blades. The plates 303 are held by locking elements 305. The adapter unit 300 has a plurality of clamping elements 310, by means of which a clamping force applied by the closing frame 31 can be transmitted to a tool 30 located in the first recess 301. As indicated by dotted lines, a tool 30 of reduced format WF2 or even smaller format WF3 can be received in the first recess 301. A secure holding of a tool 30 of different format WF2, WF3 is ensured by a telescopic design of the clamping elements 310.

In Fig. 3a Such a clamping element 310 is shown in more detail: The bolt 317 of a clamping element 310 transmits a holding force F applied by the closing frame 31. A respective bolt 317 consists of a manually rotatable adjusting bolt 317.1, which rests against the closing frame 31, and a clamping bolt 317.2 which engages on the Tool 30 is applied. In the adjusting bolt 317.1 a groove 316 is introduced, in which engages a bolted to the adapter unit spring pin 306. This spring pin 306 prevents the clamping member 310 from slipping out of the adapter unit 300 while the adapter unit 300 is inserted into or taken out of the closing frame 31. During storage of the adapter unit 300, this ensures that no clamping element 310 slips out and is lost. While the spring pin 306 prevents the clamping element 310 from slipping out, the rotatability of the pin 317 is not restricted. The clamping member 310 may further include a spring 311, as in Fig. 2 is shown, and which retracts a respective clamping bolt 317.2, while no holding force F is transmitted from the closing frame 31, in the adapter unit 300 and thus ensures that a tool 30 is released and can be removed.

If the adapter unit 300 does not receive a tool 30 of the format WF2 but of the format WF3, then the telescopic clamping element 310 must have a Experience length change 315. The implementation of this change in length 315 is in the FIGS. 3b and 3c shown in more detail. The clamping element 310 has for this purpose a dog clutch 312, the two coupling elements can be engaged with each other either in a first plane 314 or in a second plane 313. In the illustration according to Fig. 3b For example, the coupling elements of the dog clutch 312 engage each other in the first plane 314, and the clamping element 310 is adapted to clamp a reduced size tool WF2. So that the clamping element 310 can safely clamp a tool 30 of still smaller format WF3, the clamping element 310 must be lengthened and undergo a change in length 315. For this purpose, the adjusting bolt 317.1 is pulled out of the adapter unit 300 against the action of the spring pin 306, rotated by 90 ° and pushed back into the adapter unit 300 until the spring pin 306 engages in the groove 316. The result of this change in length 315 of the clamping element 310 is in Fig. 3c shown. The coupling elements of the dog clutch 312 are now engaged with each other in the second plane 313, whereby the clamping element 310 has been extended by the distance 315.

In order to ensure an equally distributed power transmission over the entire surface WF1, 302 plates 303 can be used as described above in the recesses. It can either, as in Fig. 2 shown, only individual recesses 302 are provided with plates 303, or all recesses 302 are equipped with plates 303. In order to further optimize the distribution of the punching force over the surface WF1, the plates 303 can be individually equipped with punching force transmission elements 304 depending on the design of the tool 30. Alternatively, for the at least one further recess 302, a selection of plates 303 may be provided as shown in FIGS FIGS. 4a, b and c are shown by way of example. While the plate 303 in Fig. 4a has an average number of punching force transmission elements 304 has the plate according to Fig. 4b a much smaller number and the plate according to Fig. 4c a significantly higher number of punching force transmission elements.

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

overtable

11

trimmings

12

container

13

palette

14

delivery pile

15

Control with interface and input devices

16

feed

20

Lower tool (punched chisel plate)

30

Upper tool (punching and / or embossing tool)

31

chase

100

Sheet punching and / or embossing machine

300

adapter unit

301

Recess for tool

302

Further recess

303

plate

304

Power transmission element (e.g., punching blade)

305

locking

306

feather pen

310

clamping element

311

feather

312

claw clutch

313

second level

314

First floor

315

change in length

316

groove

317

transmission bolts

317.1

adjusting

317.2

clamping bolts

WF1

maximum size

WF2

reduced format

WF3

minimum format

B

Sheet transport direction

e

Sheet transport plane

F

Holding force of the closing frame

Claims (10)

1. Adapter unit (300) including a first recess (301) for alternatively receiving diecutting and/or embossing tools (30) of different formats (WF2, WF3) in a tool mount (31) of a diecutting and/or embossing station (2),
   including a plurality of telescopic clamping elements (310) for retaining the diecutting and/or embossing tool (30),
   characterized in
   that the adapter unit (300) includes at least one further recess (302) for receiving a plate (303) provided with force transmission elements (304), and that a respective further recess (302) includes at least one locking element (305) for retaining the respective plate (303).
2. Adapter unit according to Claim 1,
   characterized in
   that it includes at least one plate (302) provided with force transmission elements (304).
3. Adapter unit according to one of the preceding claims,
   characterized in
   that the force transmission elements (304) are diecutting knives.
4. Adapter unit according to one of the preceding claims,
   characterized in
   that the adapter unit (300) is U-shaped.
5. Adapter unit according to one of the preceding claims,
   characterized in
   that a respective clamping element (310) includes a bolt (317) for transmitting a clamping force (F).
6. Adapter unit according to Claim 5,
   characterized in
   that the length of a respective clamping element (310) is variable from a first length for clamping a diecutting and/or embossing tool (30) of a first format (WF2) to a second length for clamping a diecutting and/or embossing tool (30) of a second format (WF3).
7. Adapter unit according to Claim 6,
   characterized in
   that a respective clamping element (310) includes a dog clutch (312) having two planes (131, 314) for implementing the variability of the length (315).
8. Adapter unit according to one of Claims 5 to 7,
   characterized in
   that for retaining a respective clamping element (310), the adapter unit (300) includes a respective spring pin (306) and/or that a respective clamping element (310) includes a spring (311).
9. Adapter unit according to one of Claims 2 to 8,
   characterized in
   that it includes a diecutting and/or embossing tool (30) and that the number of force transmission elements (304) depends on the number and distribution of operative elements of a respective diecutting and/or embossing tool (30) and is selected such that a diecutting and/or embossing force is approximately evenly distributed across the surface (WF1) of a platen (10) of the diecutting and/or embossing station (2).
10. Adapter unit according to one of the preceding claims,
    characterized in
    that the tool mount is a chase (31) and that the diecutting and/or embossing tool (30) is a plate element including diecutting knives and/or grooving knives and/or embossing dies.

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