DE102010051239A1 - Processing station for a punching machine and method for sample sheet delivery - Google Patents

Abstract

The invention relates to a sheet punching machine (100) with a punching station (2), at least one further processing station (3, 4) which has an upper tool (21) that is lifted by a drive (4.1) and a lower tool that interacts with it, the upper tool ( 21) has a tool holder (21.2) and a lifting tool (21.1) and the distance between lifting tool (21.1) and tool holder (21.2) can be reduced (a) by a lifting movement. This ensures that test sheets (6.1) cannot be processed by the tools (21, 23) and can be ejected. The invention also relates to a method for discharging and depositing a sample sheet (6.1).

Description

The invention relates to a storage and pay station according to the preamble of claim 1, a sheet punching and / or embossing machine according to claim 9 and a method for depositing intermediate sheets according to claim 10.

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, embossing, breaking, if necessary. Nutzentrennen and storing sheets of paper, cardboard and the same, 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 order to assess the quality of the punching process, the machine operator needs a so-called test sheet. In this sample sheet, although the punching should be done, but it should at least no separation into individual benefits have taken place. If necessary, the breaking-out process, in which waste is broken out of the punched sheet, should also be prevented. This allows the machine operator to judge all the punching lines by means of a complete, complete sheet.

In order to obtain a sample sheet, the punching machine must be temporarily switched off in the above-described punching machines. This makes it possible to remove a punched sheet before it is subsequently processed further in the stripping station and the depaneling station.

A disadvantage of this procedure is that the productivity is reduced by switching off and the subsequent startup of the punching machine.

Also known are other types of punching machines, in particular manufactured by the company Bobst, which allow to take a sample sheet without having to stop the punching machine. This is made possible by the fact that the drive of the breaking station as well as the Nutzentrennstation is disconnected from the main drive of the processing stations in the short term.

A disadvantage of this procedure is that by decoupling the masses of the drives of Nutzentrennstation and Ausbrechstation a momentum shock is introduced into the main drive system, causing a vibration excitation of the main drive system.

Object of the present invention is therefore to a processing station and a punching machine with such a processing station create, which need not be turned off for taking a sample sheet, nor undergoes a vibration entry by decoupling individual drive trains. Another object is to describe a method for discharging and depositing a sample sheet, which avoids the disadvantages of the prior art described above.

This object is achieved by a processing station with the characterizing features of claim 1, by a sheet punching and / or embossing machine according to claim 9 and by a method for discharging and depositing sample sheet according to claim 10.

The processing station according to the invention for a flatbed sheet punching and / or embossing machine has a sheet transport system for transporting the sheets through the processing station as well as a lifting upper tool, which cooperates with a lower tool. The lower tool can in particular be stationary. If the processing station is a breaking station for breaking up waste from sheets, the upper tool and lower tool are designed as stripping tools. If the processing station is a blanking and depositing station for depositing a single use of a sheet on a stack, the upper tool and lower tool are designed as a blanking tool. According to the invention, the upper tool has a tool holder and a lifting tool, which is held by the tool holder. The distance between the lifting tool and the tool holder is variable. This change in distance occurs in a particularly advantageous and therefore preferred embodiment by a lifting movement, in particular a pure vertical movement, of the lifting tool. In other words: The lifting tool is raised.

This makes it possible in an advantageous manner that even if a sample sheet is to be removed, the drive of the processing station can remain coupled to the main drive of all processing stations of the punching machine. Exactly at the time at which a sheet which is to be designed as a test sheet passes through the processing station, the distance between the lifting tool and the tool holder is reduced so far by a lifting movement that the lifting tool causes no processing of the sample sheet in the course of its normal working cycle and the sample sheet below the lifting tool can pass unprocessed. Thus, it is achieved that a test sheet learns no processing by upper tool and lower tool, while the flat-bed sheet punching and / or embossing machine as a higher-level system of the processing station does not have to be turned off.

In a particularly advantageous embodiment, the lifting tool is connected by at least one actuator with the tool holder, wherein the at least one actuator causes the change in distance. In particular, four actuators may be provided, namely one actuator each at a respective corner of the lifting tool. In a preferred embodiment, the at least one actuator is designed as a pneumatic cylinder, as this allows for a short switching times and on the other tolerates vibrations and shocks during the lifting movements of the upper tool.

In an advantageous development, the processing station has a test sheet display, which may be formed, for example, as a cassette or drip tray. This can be arranged in particular below the sheet transport system of the processing station, so that a respective sample sheet can be transported from the sheet transport system to the test sheet delivery and released there. This allows the operator to easily remove the sample sheet.

In an advantageous development of the processing station according to the invention, the latter has a control unit which controls the at least one actuator by using a number of test sheets, the sheet transport speed and, if applicable, the machine cycle predetermined by the machine operator. Thus, the at least one actuator is then actuated taking into account the working cycle and the required actuating speed when a sample sheet is to pass through the processing station unprocessed.

This control unit can be integrated in particular in the control unit of a higher-level punching machine.

The invention also relates to a sheet punching and / or embossing machine for punching and / or embossing sheets of paper, cardboard, plastic and the like with a sheet transport system, with a feeder, with a punching and / or embossing station and at least one further processing station, in particular a stripping station and a boom, wherein at least the boom is designed according to the above description of the processing station according to the invention. However, it is particularly advantageous if both breaking station and boom have the embodiment according to the invention, since such a test sheet can be designed, which has only experienced the punching process in the sense of sheet processing.

The invention also relates to a method for discharging and depositing a sample sheet in a test sheet delivery of a sheet punching and / or in particular, as described above, with at least one stamping station and at least one further machining station, which is embodied in particular as described above, the method having the following steps:
In a first step, a sheet is fed into the sheet punching machine, the sheet is transported by a transport device through the machine and there is a processing of the sheet at least by the at least one punching station. In a second step, the lifting tool of the upper tool of at least one of the processing stations, namely at least one Nutzentrenn- and depositing station - also referred to as boom - spent by lifting in a non-operative position. Even if the upper tool carries out its working stroke stroke movement, it causes no processing of the sample sheet in this non-action position. Therefore, the sample sheet can be transported in a next step in the sample sheet delivery. Subsequently, the lifting tool can be lowered back into its working position, so that subsequent sheets are processed again regularly by the lifting tool.

By a slightly modified method, a plurality of sample sheets can be discharged. For this purpose, after lifting and before lowering again the lifting tool several sheets processed in the punching station and transported to the test sheet delivery.

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

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

1 , an inventive sheet punching and / or embossing machine in an overview

2a a workstation to a first snapshot

2 B the workstation to a second snapshot

3a a processing station according to the invention to a first snapshot

3b the processing station according to the invention to a second snapshot during the discharge of a sample sheet

In 1 is the basic structure of a sheet punching and embossing machine 100 shown for punching, breaking, depaneling and storing sheets of paper, cardboard, plastic and the like. The punching and embossing machine 100 owns a feeder 1 , a punching station 2 , a breakout station 3 and a boom 4 with storage and pay dividing station, by a common machine housing 5 worn and enclosed and from a main drive 17 are driven. From one side, the so-called operator side, are the processing stations 2 . 3 . 4 accessible; on the opposite side, the so-called drive side, is the drive train of the sheet punching and embossing machine 100 , A machine control 15 controls the processes within the punching machine 100 ,

The bows 6 be through an investor 1 isolated from a pile, the sheet transport system 7 supplied and from on gripper bridges of a gripper carriage 8th gripped grippers seized at its front edge and in the sheet transport direction B intermittently through the various stations 2 . 3 and 4 the punching and embossing machine 100 pulled.

The sheet transport system 7 has several gripper carriages 8th so that several bows 6 at the same time in different stations 2 . 3 and 4 can be edited. The gripper carriage 8th 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 sub-table 9 , and an upper crucible, a so-called upper table 10 , The upper table 10 is vertically moved back and forth and provided with punching and Rillmessern. The undercounter 9 is firmly mounted in the machine frame and provided with a counter plate to the punching and Rillmessern. Alternatively, the upper table 10 fixed and the undertable 9 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 8th transports the bow 6 from the punching and embossing station 2 in the following stripping station 3 that with breakout tools 21 . 23 Is provided. In the stripping station 3 be using the stripping tools 21 . 23 the unwanted pieces of waste 11 out of the bow 6 pushed out to the bottom, causing the waste pieces 11 into a cart-like container inserted under the station 12 fall.

From the breakout station 3 the bow comes 6 in the boom 4 where the bow 6.1 either simply filed, or at the same time a separation of the individual benefits 6.2 a respective bow 6 he follows. The boom has this 4 a blanking tool 21 . 23 , The boom 4 can also do a palette 13 included on the individual bows 6 or benefit 6.2 in the form of a stack 14 be stacked so that after reaching a certain stack height the pallet 13 with the sheet pile 14 from the field of punching and embossing machine 100 can be driven away.

The 2a and 2 B show the editing process of an arc 6 in a processing station 3 . 4 using the example of the depaneling and storage station 4 in a detailed view. How out 2a Obviously, a bow was made 6 from the gripper carriage 8th of the sheet transport system 7 in the sheet transport direction B to below the with stamping 22 provided upper tool 21 transported. Below the arch 6 there is a Nutzentrenngitter as a lower tool 23 which is in a removable frame 24 is included. As in 2 B shown, experiences the lifting tool 21.1 a stroke h, which the individual benefits 6.2 of the bow 6 separated from each other and on a pile 14 stores. To do this, the stamps dive 22 of the blanking tool 21.1 with an immersion depth t in the sheet transport plane E.

Should now a test sheet 6.1 the processing station 3 . 4 happen without the sample sheet 6.1 a processing by the tools 21 . 23 learns, it is ensured according to the invention that the upper tool 21 does not dive into the sheet transport plane E during its stroke stroke h. This is based on the 3a and 3b explains:
As in 3a shown, the upper tool 21 - shown here using the example of a blanking tool - a tool holder 21.2 on which of the recording of the lifting tool, namely the Nutzentrennwerkzeugs 21.1 serves. The blanking tool 21.1 is by actuators, which are designed as a pneumatic cylinder, with the tool holder 21.2 connected. The actuators 26 can perform an adjustment, which is a change in distance a between tool holder 21.2 and lifting tool 21.1 causes. For editing a sheet, not shown here 6 leads the upper tool 21 a stroke h through. The upper tool is guided 21 during its lifting movement by means of guides 4.2 , The stroke h is the upper tool 21 from a drive 4.1 impressed. The drive 4.1 can thereby by a - not shown here - gear train with the machine drive 17 the sheet punching and embossing machine 100 be connected. To edit a sheet 6 to effect, here its Nutzentrennung, leads the upper tool 21 in each machine cycle a working stroke of the size H through, with the stamp 22 immerse in the sheet transport plane E (immersion depth t).

As in 3b shown, there is a test sheet 6.1 below the upper tool 21 , Because of this from the tools 21 . 23 should not be processed, but from the gripper carriage 8th of the sheet transport system 7 , to the test sheet display 25 was to be transported by the actuators 26 the distance between the tool holder 21.2 and the lifting tool 21.1 significantly reduced (a). While the lifting tool 21 in the snapshot of 3a is at its highest point, is the lifting tool 21 in the snapshot of 3b in its lowest point. That is, it has already carried out its stroke of stroke H and yet is still above the sample sheet 6.1 so that this is ensured by the top tool 21 is not processed. The sample sheet 6.1 can therefore, without any editing in the processing station 3 . 4 to be further transported to the test sheet display.

A breakout station 3 can analogously in the 3a and 3b illustrated Nutzentrenn- and storage station 4 be educated. Breakout tools used in stripping stations are well known to those skilled in the art. Instead of the Nutzentrennstempel 22 owns the lifting tool 21.1 of the stripping tool Stamp for breaking up waste 11 out of the bow 6 , It is crucial that the distance between the tool holder 21.2 and the stripping tool 21.1 changed, that is reduced, will, so that a sample sheet 6.1 no breaking out of his waste pieces 11 learn. Instead of the Nutzentrenngitters comes as a lower tool 24 a break-out board is used. In addition, a lying below the stripping board, stroke-driven counter tool can be used with Ausbrechstiften, the Ausbrechstifte grab a respective piece of waste from below and ensure its removal. To damage the underside of the sample sheet 6.1 By avoiding the lower stripping pins, it may be necessary to lower the counter tool during test sheet ejection. This can be done advantageously analogous to the lifting of the upper tool described above.

LIST OF REFERENCE NUMBERS

1

investor

2

Punching and / or embossing station

3

stripping

4

boom

4.1

drive

4.2

Guide upper tool

5

machine housing

6

bow

6.1

test sheet

6.2

Use

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

17

machine drive

19

Counter tool (lifting stripping pins)

21

Upper tool with punches

21.1

Blanking tool or stripping tool (lifting tool)

21.2

tool holder

22

stamp

23

Dividing grille or stripping board (lower tool)

24

Removable frame for holding a dividing grille or the lower tool with break-out board

25

Sample sheet delivery

26

Actuator (pneumatic cylinder)

100

Sheet punching and embossing machine

B

Sheet transport direction

e

Sheet transport plane

H

stroke

a

Distance change by lifting movement

H

Lifting movement of upper tool

t

Immersion depth

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 3044083 A1 [0004]
• DE 202007012349 U1 [0031]

Claims (11)

Processing station ( 3 . 4 ) for a flatbed sheet punching and / or embossing machine ( 100 ) for the removal of waste ( 11 ) from sheet ( 6 ) or to store individual benefits ( 6.2 ) of an arc ( 6 ) on a stack ( 14 ) and test sheets ( 6.1 ), with a sheet transport system ( 7 ), with one of a drive ( 4.1 ) lifting upper tool ( 21 ) and a cooperating, lower tool ( 23 ) for the removal of waste ( 11 ) or to separate the benefits ( 6.2 ), characterized in that the upper tool ( 21 ) a tool holder ( 21.2 ) and a lifting tool ( 21.1 ), wherein the distance between the lifting tool ( 21.1 ) and tool holder ( 21.2 ) is variable (a). Processing station ( 3 . 4 ) according to claim 1, characterized in that the change in distance by a lifting movement (a) of the lifting tool ( 21.1 ) is effected. Processing station ( 3 . 4 ) according to one of the preceding claims, characterized in that the lifting tool ( 21.1 ) by at least one actuator ( 26 ) with the tool holder ( 21.2 ) and the at least one actuator ( 26 ) causes the change in distance (a). Processing station ( 3 . 4 ) according to claim 3, characterized in that the at least one actuator is a pneumatic cylinder ( 26 ). Processing station ( 3 . 4 ) according to one of the preceding claims, characterized in that the processing station ( 4 ) a test sheet display ( 25 ) having. Processing station ( 2 . 3 ) according to one of claims 3 to 5, characterized in that the processing station ( 3 . 4 ) a control unit ( 15 ) using a predetermined number of sample sheets ( 6.3 ), the sheet transport speed and / or the machine cycle the at least one actuator ( 26 ). Processing station ( 3 . 4 ) according to one of the preceding claims, characterized in that the processing station ( 3 . 4 ) a stripping station ( 3 ) is equipped with a stripping tool ( 21 . 23 ). Processing station ( 3 . 4 ) according to one of claims 1 to 6, characterized in that the processing station ( 3 . 4 ) a Nutzentrenn- and storage station ( 4 ) is with a blanking tool ( 21 . 23 ). Sheet punching and / or embossing machine ( 100 ) for punching and / or embossing sheets ( 6 ) made of paper, cardboard, plastic and the like with a sheet transport system ( 7 ), with an investor ( 1 ), a punching and / or embossing station ( 2 ), at least one further processing station ( 3 . 4 ) in particular a stripping station ( 3 ) and a boom ( 4 ), whereby at least the boom ( 4 ) according to one of the preceding claims. Method for discharging and depositing from a sample sheet ( 6.1 ) in a test sheet display ( 25 ) a sheet punching and / or embossing machine ( 100 ), in particular according to claim 7, with at least one stamping station ( 2 ) and at least one further processing station ( 3 . 4 ), in particular according to one of claims 1 to 8, characterized by the following steps: a) feeding a sheet ( 6.1 ) in the sheet punching and / or embossing machine ( 100 ), Transport of the bow ( 6.1 ) by means of a transport device ( 7 ) and editing the sheet ( 6.1 ) at least through the punching station ( 2 ) b) Lifting the lifting tool ( 21.1 ) of the upper tool ( 21 ) at least one of the processing stations ( 3 . 4 ) in an unactuated position c) transport of the sheet ( 6.1 ) in a test sheet display ( 25 ) d) lowering the lifting tool ( 21.1 )) at least one of the processing stations ( 3 . 4 ) in his working position Method for discharging and depositing a plurality n of sample sheets ( 6.1 ) in a test sheet display ( 25 ) a sheet punching and / or embossing machine ( 100 ), in particular according to claim 7, with at least one stamping station ( 2 ) and at least one further processing station ( 3 . 4 ), in particular according to one of claims 1 to 8, characterized by the following steps: a) feeding a first sheet ( 6.1 ) in the sheet punching and / or embossing machine ( 100 ), Transport of the bow ( 6.1 ) by means of a transport device ( 7 ) and editing the sheet ( 6.1 ) at least through the punching station ( 2 ) b) Lifting the lifting tool ( 21.1 ) of the upper tool ( 21 ) at least one of the processing stations ( 2 . 3 ) in an un-action position c) transport of the first sheet ( 6.1 ) in a test sheet display ( 25 ) d) repetition of steps a) and c) with n - 1 additional sheets ( 6.1 ) e) Lowering the lifting tool ( 21.1 ) of the at least one processing station ( 3 . 4 ) in his working position

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