EP2399715B1 - Depositing and use separation station for a sheet blanking press - Google Patents

Description

The invention relates to a storage and payout station according to the preamble of claim 1, a sheet punching and / or embossing machine according to claim 7 and a method for depositing intermediate sheets according to claim 11.

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 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 forth, 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.

The DE 195 16 023 A1 describes the boom of a sheet punching machine. There are provided a receptacle for unpunched sheets and a handling device for the unpunched sheets. At a predeterminable height of the stack of punched sheets is placed on the stack of punched sheets or punched out benefit of all single stack covering un-punched bow. The tray indicates this back gate and a front gate. Both gates are arranged substantially vertically and the front gate is displaceable in the vertical direction. In the filing into a storage rake is displaced. The storage rake is movable in a lowered position for receiving an unpunched sheet from the tray out. Outside the shelf of the storage rake can be raised and moved in a raised position together with the unpunched bow after a lowering of the front gate in the tray inside.

Also known is an alternative solution from Bobst, in which a whole, unpunched sheet is removed from a receptacle and deposited directly on the stack while the stamped sheets or blanks are stacked on a rake. The stack on the rake is subsequently set down on the unpunched separation sheet by moving out the rake. Such a device is for example in the US Pat. No. 6,481,708 B2 disclosed.

Both solutions have in common that an auxiliary stack is formed on a rake and a separating sheet, also referred to as an intermediate sheet, is fed from a separate cassette. The production of the punching machine must be interrupted for retraction of the rake, resulting in a production loss of about 5 to 10 sheets.

task

Object of the present invention is therefore to provide a storage and pay station, and to describe a method for storing intermediate sheets, which further develop the known systems and at least reduce the production loss.

This object is achieved by a storage and pay station with the characterizing features of claim 1, by a sheet punching and / embossing machine according to claim 7 and by a method for depositing intermediate sheets according to claim 11.

The storage and pay dividing station according to the invention is suitable for a flat-bed sheet punching and / or embossing machine and is used to store individual benefits of a sheet and whole sheet on a stack. The storage and pay station has a hubbewegliches upper tool and cooperating with this lower tool for separating the benefits, the sheets are transported by a sheet transport system substantially in a sheet transport plane in the storage and Nutzentrennstation and transported. According to the invention, the lower tool is also designed to be movable. According to the invention, the lower tool can be raised from its working position to the depanelling in an offside position for sheet laying up to above the level of the sheet transport plane. This ensures that a sheet transport system, an unpunched sheet can be stored as an intermediate sheet on the delivery pile. A production interruption is not necessary for this, whereby the productivity in the storage and depaneling station or the punching machine comprising this station can be substantially increased. Another advantage is also that can be dispensed with the mechanically complex system with intermediate sheet cassette and retractable rake according to the prior art. Also, in the inventive solution replacing a Zwischenbogenvorrats in an interleaf cassette with a job change with new sheet size is no longer necessary. Another advantage arises because the uninterrupted current, i. no interruption for the supply of an intermediate sheet, a particularly stable sheet running.

In an advantageous embodiment of the invention, the storage and pay station on a drive, which is connected to the upper tool and the lifting movement of the upper tool is used.

In a first embodiment, the storage and pay station is further developed such that it has a coupling device for temporary mechanical connection of the lower tool with the upper tool. This ensures that the upper tool and the lower tool can be lifted together during the coupling. The drive of the storage and Nutzentrennstation thus causes the short term, in particular for the duration of a power stroke, coupled unit of upper tool and Lower tool is spent in an offside position above the sheet transport plane and a whole, unpunched sheet can be stored as an intermediate sheet on the delivery pile.

In a second embodiment, the storage and pay dividing station is developed such that it has a drive device which is connected only to the lower tool and the lifting of the lower tool beyond the level of the sheet transport plane also serves. The drive device may have, for example, at least one pneumatic, hydraulic or electromechanical actuator. In particular, a fast-acting pneumatic cylinder can be attached to each of the four corners of the lower tool.

The invention also relates to a sheet punching and / or embossing machine for punching and / or embossing sheets of paper, cardboard and the like. This machine according to the invention has at least one feeder, a punching and / or embossing station, a breakout station and a storage and pay-out station as described above. Particularly advantageously, the sheet punching and / or embossing machine has a machine drive for actuating the punching and / or embossing station, the breaking station and the storage and pay station. The upper tool of the storage and Nutzentrennstation is driven by the machine drive.

In a particularly advantageous and therefore preferred embodiment, the sheet punching and / or embossing machine according to the invention in its stamping and / or - embossing station and in their Ausbrechstation each have a Hubunterbrechungseinrichtung. This serves to prevent the working stroke of the punching tools or stripping tools. Such Hubunterbrechungseinrichtungen are the expert, for example from the DE 10 2007 012 638 A1 and the DE 10 2007 012 639 A1 known, the content of which is hereby made the subject of this description.

In an advantageous embodiment of the sheet punching and / or embossing machine, this has a control device for driving the coupling device or the drive means of the storage and pay station and for driving the Hubunterbrechungseinrichtungen of punching and / or embossing station and Ausbrechstation. Thus, the individual stations of the sheet punching and / or embossing machine can be controlled so that a sheet from the feeder through the processing stations of the machine can be transported through unprocessed through to the delivery pile. A sheet removed from the investment stack can thus be used as an intermediate sheet on the delivery pile and cause a higher stability of the benefit pile there.

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. In this case, the storage and pay station instead of the coupling device or the drive device may have a sheet transport path, which lies below the lower tool. An intermediate sheet to be deposited on the delivery stack is then guided by its linearly driven gripper carriage at the upstream end of the storage and depaneling station by means of a switch to the lower sheet transport path and deposited on the stack. About a switch in the region of the downstream end of the storage and Nutzentrennstation the gripper carriage is returned to its usual orbit.

• In einem ersten Schritt wird vom Anleger der Bogenstanz- und/oder -prägemaschine ein Bogen in die Maschine zugeführt. In einem zweiten Schritt erfolgt der Transport des Bogens durch die Bogenstanz- und/oder -prägemaschine mit ihren Bearbeitungsstationen, ohne dass eine Bearbeitung des Bogens erfolgt. In einem dritten Schritt wird, bevor der Bogen die Ablage- und Nutzentrennstation erreicht, das Unterwerkzeug von seiner Arbeitsposition über die Bogentransportebene in eine Abseitsposition über die Transportebene angehoben. In einem vierten Schritt erfolgt der Transport des Bogens in die Ablage- und Nutzentrennstation. Kommt ein Bogentransportsystem mit greiferbestückten Greiferwagen zum Einsatz, so wird der Bogen von den Greifern freigegeben, sobald er seine Positionen über dem Ablagestapel erreicht hat. In einem fünften Schritt kann nun der Bogen auf den Auslagestapel als Zwischenbogen abgelegt werden, wobei das Ablegen zusätzlich durch die Hubbewegung des Oberwerkzeugs gemäß dessen Arbeitstakt unterstützt werden kann.

The invention also provides a method for depositing intermediate sheets on the delivery stack of a sheet punching and / or embossing machine with a storage and pay station. According to the invention, this process has the following steps:

• In a first step, a sheet is fed into the machine by the investor of the sheet punching and / or embossing machine. In a second step, the sheet is transported through the sheet punching and / or embossing machine with its processing stations, without the sheet being processed. In a third step, before the sheet reaches the storage and pay dividing station, the lower tool is raised from its working position on the sheet transport plane in an offside position on the transport plane. In a fourth step, the sheet is transported to the storage and pay station. If a sheet transport system with gripper-mounted gripper carriage is used, the sheet is released by the grippers as soon as it reaches its positions above the gripper Has reached the discard pile. In a fifth step, the sheet can now be placed on the delivery stack as an intermediate sheet, the depositing can be additionally supported by the lifting movement of the upper tool according to its power stroke.

If only one intermediate sheet is to be deposited on the delivery stack, in a next step, the lower tool is lowered back into its working position, so that subsequent sheets can be processed by the upper tool and lower tool again as intended, i. that the benefits of each arc are separated.

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.

eine erfindungsgemäße Bogenstanz- und/oder -prägemaschine in einer Übersichtsdarstellung

Fig. 2a

eine erste Ausführungsvariante einer erfindungsgemäßen Ablage- und Nutzentrennstation in einer ersten Position

Fig. 2b

die Ablage- und Nutzentrennstation aus Fig. 2a in einer zweiten Position

Fig. 3

eine zweite Ausführungsvariante einer erfindungsgemäßen Ablage- und Nutzentrennstation

Fig. 4

eine Ablage- und Nutzentrennstation gemäß dem Stand der Technik

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

Fig. 1

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

Fig. 2a

a first embodiment of a storage and Nutzentrennstation invention in a first position

Fig. 2b

the storage and Nutzentrennstation off Fig. 2a in a second position

Fig. 3

a second embodiment of a storage and Nutzentrennstation invention

Fig. 4

a storage and Nutzentrennstation according to the prior art

In FIG. 1 the basic structure of a sheet punching and embossing machine 100 for punching, breaking, depaneling and storing 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 with storage and pay station 20, 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 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. 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.

Punching station 2 and breaking station 3 each have a Hubunterbrechungseinrichtung 18, as shown in the DE 10 2007 012 638 A1 and the DE 10 2007 012 639 A1 is described, which is hereby incorporated by reference.

From the stripping station 3, the sheet 6 passes into the boom 4, where the sheet 6.1 is either simply stored, or at the same time a separation of the individual 6.2 uses a respective sheet 6. The boom 4 may also include a pallet 13 on which the individual sheets 6 and 6.2 are stacked in the form of a stack 14, so that after reaching a certain stack height, the pallet 13 with the sheet stack 14 from the field of punching and embossing machine 100 can be driven away.

In Fig. 4 a boom 4 is shown with a storage and pay station 20 according to the prior art. Intermediate sheets are, as indicated by the arrow z, fed from an intermediate sheet cassette (not shown). While the upper tool 21 is liftable, the lower tool 23 is stationary.

In Fig. 2a a first embodiment of a storage and pay station 20 of a boom 4 according to the invention is shown. The storage and pay station 20 includes an upper tool 21 with punches 22 and a lower tool 23, formed as a Nutzentrenngitter, which may be received by a removable frame 24. The Nutzentrenngitter 23 is located in the representation of Fig. 2a in his working position. A transported by a gripper carriage 8 sheet 6 is, as in Fig. 1 represented transported through the punching station 2 and the breaking station 3 through to the storage and pay station 20. The upper tool 21 performs in its working stroke a lifting movement, wherein the punch 22 in cooperation with the Nutzentrenngitter 23 separate the individual benefits 6.2 of a respective arc 6. As in Fig. 2a implied, numerous benefits 6.2 have already been stored on a delivery stack 14. In order to increase the stability of the delivery stack 14, an intermediate sheet 6.1 is to be deposited on the delivery stack 14 in the next step. The two coupling elements 25 shown therefore cause a temporary mechanical connection of the lower tool 23 with the upper tool 21 (see double arrows k). The interconnected by the coupling elements 25 tools 21 and 23 are of a in Fig. 2a not shown machine drive 17 raised together h 'h. This results in the in Fig. 2b illustrated situation: The lower tool 23 is located above the sheet transport plane E and transported by a gripper carriage 8 in the storage and pay station 20 unprocessed intermediate sheet 6.1 can be stored on the delivery stack 14. Subsequently, the coupled tools 21, 23 are lowered again by the drive 17 h 'h, so that the lower tool 23 of his in Fig. 2b shown offside position again in his in Fig. 2a shown working position is spent. Once the lower tool 23 is back in its working position, the coupling of the tools 21, 23 is released by the coupling elements 25. The driven coupling elements 25 are in the FIGS. 2a and 2b only exemplified and shown schematically. This illustration is not intended to be limiting; the execution of such a coupling device is at the discretion of the expert.

Fig. 3 shows an alternative embodiment of the storage and pay dividing station 20 of a boom 4. The storage and Nutzentrennstation 20 has an upper tool 21 with punches 22, which in conjunction with a Nutzentrenngitter 23 as a lower tool separating and dropping 6.2 benefits from a sheet 6 causes a delivery stack 14. In contrast to the illustrations Fig. 2a and 2b the storage and pay station 20 has no coupling elements 25. Instead, the removable frame 24, which receives the Nutzentrenngitter 23, connected to Hubaktuatoren 26. In an alternative, not shown embodiment, the Hubaktuatoren 26 attack directly on the blanking tool 23. During operation of the storage and pay dividing station 20 for Nutzentrennen the upper tool 21 performs a lifting movement h, so that the punch 22 respectively 6.2 utility by the Blanking grid 23 push therethrough. The Nutzentrenngitter 23 is to do so in a working position below the sheet transport plane E. If an intermediate sheet 6.1 are stored on the delivery stack 14 - which according to the representation of Fig. 3 happened in the penultimate power stroke - so the Nutzentrenngitter 23 is spent together with its removable frame 24 of the Hubaktuatoren 26 in an offside position above the sheet transport plane E. A in the sheet transport direction B in the sheet transport plane E in the storage and pay station 20 transported intermediate sheet 6.1 can then be stored on the delivery stack 14. As soon as the intermediate sheet 6.1 has been deposited and if no further intermediate sheet is to be deposited directly after the delivery stack 14, removable frames 24 are moved from the offside position, not shown, back into the illustrated working position, that is to say lowered, so that they are subsequently deposited in the tray and pay station 20 transported punched sheet 6 again a separation and storage of benefits 6.2 can be done.

LIST OF REFERENCE NUMBERS

1

investor

2

Punching and / or embossing station

3

stripping

4

boom

5

machine housing

6

bow

6.1

slip 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

20

Storage and pay dividing station

21

Upper tool with punches

22

stamp

23

Dividing grille (lower tool)

24

Removable frame for holding a blanking grid

25

driven coupling element (coupling device)

26

Hubaktuator lower tool (drive device)

100

Sheet punching and embossing machine

B

Sheet transport direction

e

Sheet transport plane

H

Lifting movement of upper tool

H'

Lifting movement of lower tool

k

clamping movement

z

Supply of intermediate sheets from interleaf cassette

Claims (10)

1. Depositing and blank separating station (20) for a flat-bed diecutting and/or embossing machine (100) for depositing individual blanks (6.2) of a sheet (6) and entire sheets (6.1) on a stack (14), including a sheet transporting system (7) with a vertically movable upper tool (21) and a lower tool (23) cooperating with the upper tool (21) to separate the blanks,
   characterized in
   that each sheet (6, 6.1) is transported into the depositing and blank separating station (20) in a plane (E) of sheet transport by the sheet transporting system (7),
   that the lower tool (23) is vertically movable (h') and liftable from its operating position into a remote position above the plane (E) of sheet transport.
2. Depositing and blank separating station according to Claim 1,
   characterized in
   that the depositing and blank separating station (20) includes a drive (17) and that the latter is connected to the upper tool (21) for vertically moving (h) the upper tool (21).
3. Depositing and blank separating station according to one of the preceding claims,
   characterized in
   that the depositing and blank separating station (20) includes a coupling device (25) for temporarily connecting the lower tool (23) and the upper tool (24) in a mechanical way.
4. Depositing and blank separating station according to Claims 2 and 3,
   characterized in
   that while coupled, the upper tool (21) and the lower tool (23) are jointly liftable (h, h').
5. Depositing and blank separating station according to Claim 2,
   characterized in
   that the depositing and blank separating station (20) includes a drive device (26) and that the latter is connected to the lower tool (23) to lift (h') the lower tool (23) above the plane (E) of sheet transport.
6. Sheet-fed diecutting and/or embossing machine (100) for diecutting and/or embossing sheets (6) of paper, board and the like, including a sheet-transporting system (7), at least one feeder (1), a diecutting and/or embossing station (2), a stripping station (3), and a depositing and blank separating station (20) according to one of the preceding claims.
7. Sheet-fed diecutting and/or embossing device according to Claim 6,
   characterized in
   that the sheet-fed diecutting and/or embossing machine (100) includes a machine drive (17) at least for actuating the diecutting and/or embossing station (2), the stripping station (3) and the depositing and blank separating station (20), the upper tool (21) of the depositing and blank separating station (20) being driven by the machine drive (17).
8. Sheet-fed diecutting and/or embossing machine according to Claim 7,
   characterized in
   that the diecutting and/or embossing station (2) and the stripping station (3) include a respective vertical-movement interruption device (18).
9. Sheet-fed diecutting and/or embossing machine according to Claim 8,
   characterized in
   that the depositing and blank separating station (20) is designed in accordance with Claim 4 and 6, respectively, and that the sheet-fed diecutting and/or embossing machine (100) includes a control device (15) for actuating the coupling device (25) and the drive device (26), respectively, and the vertical-movement interruption device 818).
10. Method for depositing intermediate sheets (6.1) on a delivery stack (14) of a sheet-fed diecutting and/or embossing machine (100), in particular according to one of Claims 6 to 9, including a depositing and blank separating station (20), in particular according to one of Claims 1-5, characterized by the following steps:

    a) feeding a sheet (6.1) into the sheet-fed diecutting and/or embossing machine (100)

    b) transporting the sheet (6.1) through the sheet-fed diecutting and/or embossing machine (100) and its processing stations (2, 3) without processing the sheet (6.1)

    c) lifting the lower tool (23) of the depositing and blank separating station (20) above the plane (E) of sheet transport

    d) transporting the sheet (6.1) into the depositing and blank separating station (20)

    e) depositing the sheet (6.1) on the delivery stack (14) as an intermediate sheet

Images