EP1882566B1 - Sheet cutting and creasing press with registration alignment and method for operating such a press - Google Patents

Sheet cutting and creasing press with registration alignment and method for operating such a press Download PDF

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Publication number
EP1882566B1
EP1882566B1 EP07112024A EP07112024A EP1882566B1 EP 1882566 B1 EP1882566 B1 EP 1882566B1 EP 07112024 A EP07112024 A EP 07112024A EP 07112024 A EP07112024 A EP 07112024A EP 1882566 B1 EP1882566 B1 EP 1882566B1
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EP
European Patent Office
Prior art keywords
sheet
gripper
diecutting
machine
sheets
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP07112024A
Other languages
German (de)
French (fr)
Other versions
EP1882566A2 (en
EP1882566A3 (en
Inventor
Hendrik Dr. Frank
Stefan Görtz
Miroslav Vanek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE102007020497A external-priority patent/DE102007020497A1/en
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP1882566A2 publication Critical patent/EP1882566A2/en
Publication of EP1882566A3 publication Critical patent/EP1882566A3/en
Application granted granted Critical
Publication of EP1882566B1 publication Critical patent/EP1882566B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B26D7/015—Means for holding or positioning work for sheet material or piles of sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/08—Feeding articles separated from piles; Feeding articles to machines by grippers, e.g. suction grippers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/12—Registering, e.g. orientating, articles; Devices therefor carried by article grippers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/33—Modifying, selecting, changing orientation
    • B65H2301/331—Skewing, correcting skew, i.e. changing slightly orientation of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/50—Gripping means
    • B65H2405/55—Rail guided gripping means running in closed loop, e.g. without permanent interconnecting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2555/00—Actuating means
    • B65H2555/10—Actuating means linear
    • B65H2555/13—Actuating means linear magnetic, e.g. induction motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/176—Cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/176—Cardboard
    • B65H2701/1762—Corrugated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/42—Die-cutting

Definitions

  • the invention relates to a method for operating a sheet punching and embossing machine according to claim 1 and a sheet punching and embossing machine with register alignment according to claim 2.
  • 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 designatedWhentrenn arthritis.
  • the punching tool and punched riddle plate In order to achieve a high product quality of the punched sheets, it is necessary that the sheets and tools are precisely aligned with each other.
  • the punching tool and punched riddle plate In the punching station of a sheet punching and embossing machine, the punching tool and punched riddle plate must be brought to an exact position in the circumferential direction. It must also be ensured that both tools are directly perpendicular to the sheet transport direction without skewing. This reference position is called "first knife".
  • the tools In the subsequent processing stations, the tools must be adjusted relative to the position of the first knife, such. B. the stripping board in the breaker and therictrenngitter in therictrennstation. The tools must be set in their three degrees of freedom.
  • the tools in the subsequent processing stations must also be readjusted to bring them back into the correct position relative to the "first knife”.
  • the register describes the positional accuracy of the printed image at the cutting, creasing and breaking edges of the sheet.
  • a disadvantage of the register-accurate alignment of the prior art is that due to the high set-up times, i. due to the high time required for the adjustment of the tools, the machine productivity is impaired.
  • the DE 10 2006 025 074 A1 discloses a method and apparatus for feeding sheets to a printing machine, wherein it is provided that a sheet is detected in movement at a sheet edge by means of grippers. In gripper closure, the sheet position is then detected and, in the case of deviation from a desired position, a correction of the sheet position in or against the transport direction, transversely thereto and in oblique alignment is made. Then the sheet is transferred to a rotating onward transport system accelerated.
  • the object of the present invention is to describe a sheet punching and embossing machine which has short makeready times and high productivity.
  • This object is achieved by a method for operating a sheet punching and embossing machine according to claim 1 and a sheet punching and embossing machine according to claim 2.
  • the invention comprises a method for operating a sheet punching and embossing machine with sheet feeder, at least one processing station and a sheet transport system.
  • a single sheet is singulated from the sheet pile by a sheet feeder and passes over a feed tray.
  • the bow is pre-aligned at its front and side edges and then gripped by a pre-gripper system.
  • the printed image of the sheet is optically measured with a measuring system, which is formed by cameras and / or sensors.
  • the actual position of the printed image is compared with its nominal position. From the Comparison of the position values calculates correction values for slanted curves, side registration and circumferential registration, which are made available to the machine control.
  • the register-accurate page orientation of the sheet is done by an investment system.
  • the side-facing sheet is transferred to grippers of linearly driven gripper carriages of the sheet transport system.
  • the gripper carriage transports the sheets to the processing stations and stops the gripper carriages as soon as the sheet is in the middle of the processing station.
  • the sheet positioning happens regardless of the sheet format. This positioning is followed by skew orientation and perimeter registration by incremental movements of the linear drives, each located at the outer end of a gripper carriage. Once the sheet is aligned, the sheet can be processed.
  • the sheet transport steps to the sheet positioning, skew and perimeter register alignment and sheet processing stages are repeated for each sheet in a respective processing station.
  • the method for operating the sheet punching and embossing machine is advantageously supplemented by two further steps: A sample sheet is taken for inspection, d. H. a sheet processed by the machine is compared with its target machining. Corresponding to the difference between target machining and actual machining, correction values for the circumferential and skew register in the respective machining stations are entered into the machine control via an interface.
  • An inventive sheet punching and embossing machine has a sheet feeder, at least one punching station and at least one further processing station, such.
  • B. Ausbrecherstation or Togethertrennstation a machine control and a sheet transport system.
  • the sheet transport system has revolving gripper carriages with gripper bars equipped with grippers for gripping sheets of paper, cardboard and the like on a gripper edge and moving them through the machine.
  • the gripper carriages are driven at their outer ends by at least one linear drive.
  • the sheets are each in their circumferential direction and in its skew aligned by the incremental motion generated by linear drives.
  • the oblique alignment is done by the - viewed in the sheet transport direction - right and left carriage of a gripper carriage along the guide rails formed by stator segments of the sheet transport system is unevenly moved, ie by the cars are moved to different distances.
  • the page orientation is done by an additional device for page orientation.
  • the sheet punching and embossing machine has an optical measuring system for measuring the sheets at least in front of the first processing station.
  • the sheet punching and embossing machine can also have an optical measuring system in front of each processing station.
  • the measuring system uses elements known to the person skilled in the art, such as cameras, lasers and sensors for determining the actual arc position.
  • the sheet punching and embossing machine measuring system machine control and sheet transport system are connected to each other via data lines, in particular by a control loop, and data can be exchanged.
  • the sheet punching and embossing machine has a device for determining the position of the gripper carriage. This includes sensors attached to the machine frame and signalers attached to the respective gripper carriages. The signals emitted by the signal transmitters are received by the sensors and thus the position of a respective gripper carriage is determined. The sensors are mounted in particular in the processing stations and the punching station.
  • the gripper carriage by the linear actuators both forward and be moved back, ie in the sheet transport direction, which is given by the direction from the feeder to the boom, as well as in the opposite direction.
  • the return movement can be advantageously used in particular in the sheet alignment as well as in the transfer of the sheet to the gripper of the gripper carriage and thereby contribute to a faster and more accurate alignment or transfer.
  • 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, 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 and supplied and gripped by gripper bars of gripper carriage 8 grippers at its front edge and intermittently pulled in the sheet transport direction F through the various stations 2, 3 and 4 of the punching and embossing machine 100.
  • signal generator 31 On the gripper carriage 8 are signal generator 31, which may be configured, for example, as magnetic or light-emitting elements.
  • the punching station 2 consists of a lower table 9 and an upper table 10.
  • the lower table 9 is fixedly mounted in the machine frame and provided with a counter plate to the punching knife.
  • the upper table 10 is mounted vertically movable back and forth.
  • 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.
  • 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.
  • the boom 4 may also include a pallet 13 on which the individual sheets are stacked in the form of a stack 14, so that after reaching a certain stack height, the pallets can be moved away with the stacked sheets 14 from the field of punching and embossing machine 100.
  • the machine control 15 has an interface for displaying and entering machine parameters.
  • Fig. 2 the stationary part of the sheet transport system 7 is shown.
  • the sheet transport system 7 has two mutually parallel circumferential guide rails, which consist of a plurality of stator segments 40.
  • F gripper carriage 8 can be moved through the processing stations 2, 4.
  • the gripper carriage 8 have anchors (in Fig. 2 not shown), which act together with the stationary stator 40 as linear motors.
  • stator segments 40 are particularly finely divided by a large number of stator segments 40. This ensures that a gripper carriage 8 (in Fig. 2 not shown) and transported with grippers on the gripper edge of the sheet sheet 6 can be stopped accurately.
  • Each stator segment 40 is a frequency converter (in Fig. 2 not shown) associated with the construction of a magnetic field in the stator 40, which is controlled by a central controller 15.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Details Of Cutting Devices (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Discharge By Other Means (AREA)
  • Making Paper Articles (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Betreiben einer Bogenstanz- und - prägemaschine gemäß Anspruch 1 und eine Bogenstanz- und -prägemaschine mit Passerausrichtung gemäß Anspruch 2.The invention relates to a method for operating a sheet punching and embossing machine according to claim 1 and a sheet punching and embossing machine with register alignment according to claim 2.

Stand der TechnikState of the art

Als Stanzen wird das Schneiden mit in sich geschlossenen geometrischen Zuschnittsformen bezeichnet, die kreisförmig, oval oder mehreckig sowie Phantasieformen aller Art sein können. Auch die in der Druckweiterverarbeitung geübten Praktiken, wie Stanzen mit Locheisen, Eckenabstoßen und Registerstanzen werden zu diesem Bereich gezählt. Die Stanzung erfolgt gegen eine Stanzunterlage oder gegen Stempel, teilweise sind es auch Schervorgänge (vg. Druckweiterverarbeitung, Ausbildungsleitfaden für Buchbinder, Bundesverband Druck e. V. 1996, S. 351 ff. ). Verpackungsmaterialien aus Papier, Karton, Pappe oder Wellpappe werden hauptsächlich im Bogenformat gestanzt. Beim Stanzvorgang können zusätzlich aber auch Rilllinien oder Blindprägungen in den Nutzen eingebracht werden. Dieser komplexe Prozess macht es unabdingbar, die Bogen einzeln zu stanzen. Da es sich bei den Endprodukten um anspruchsvolle Verpackungen hinsichtlich technischer und graphischer Ausführung handelt (etwa Verpackungen für Kosmetik, Zigaretten, Pharmazie, Lebensmittel, etc.), werden besondere Anforderungen nicht nur an die Verpackungsmaterialien selbst gestellt, sondern es sind für optimale Resultate auch Stanzwerkzeuge mit geringsten Toleranzen und äußerst präzise und zuverlässig arbeitende Stanzmaschinen erforderlich. Diesen Ansprüchen wird das Flachbettstanzen am besten gerecht. Dabei werden die gedruckten und auf einer Palette gestapelten Bogen der Stanzmaschine zugeführt. In der Maschine werden in einer Ausrichteinrichtung die zu stanzenden Bogen passgenau ausgerichtet, von einem Greiferwagen übernommen und exakt in der Stanzeinrichtung zwischen einem fest gelagerten Untertisch und einem über einen Kniehebel oder Exzentergetriebe vertikal bewegbaren Obertisch positioniert.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 stamps, in some cases it is also shearing operations (see also print finishing, training guideline for Buchbinder, Bundesverband Druck e. V. 1996, p. 351 ff. ). 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 bekannten Bogenstanz- und Prägemaschinen, die zum Stanzen, Ausbrechen, Prägen und Ablegen von Bögen aus Papier, Pappe und der gleichen eingesetzt werden, ist es bekannt die Bögen mittels Greiferwagen durch die einzelnen Stationen der Maschine zu bewegen. An den Greiferwagen sind Greifer befestigt, die die Bögen an einem vorderen Ende ergreifen, wobei die Greiferwagen selbst an endlosen Ketten durch die Maschine bewegt werden. Durch diese Art der Bewegung der Bögen durch die Maschine wird ein kontinuierliches Arbeiten in den einzelnen hintereinander angeordneten Stationen der Maschine ermöglicht.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. Grippers are attached to the gripper carriage, gripping the arches at a front end, the gripper carriages themselves being moved through the machine on endless chains. This type of movement of the sheets through the machine enables continuous operation in the individual successively arranged stations of the machine.

Eine derartige Flachbettstanze ist beispielsweise aus der DE 30 44 083 A1 bekannt. Die beiden Tische sind mit Schneid- und Rillwerkzeugen bzw. entsprechenden Gegenwerkzeugen bestückt, mit denen aus dem taktweise zwischen die Tischfläche geführten Bögen die Nutzen ausgestanzt und gleichzeitig die zum sauberen Falten notwendigen Rillen eingedrückt werden. In der nachfolgenden Ausbrecheinrichtung wird der Abfall über Ausbrechwerkzeuge maschinell entfernt. Je nach Ausstattung der Maschine können schließlich die gestanzten Nutzen in einer hierfür vorgesehenen Nutzentrenneinrichtung separiert werden.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.

Um eine hohe Produktqualität der Stanzbögen zu erreichen, ist es notwendig, dass Bogen und Werkzeuge passergenau zueinander ausgerichtet sind. In der Stanzstation einer Bogenstanz- und -prägemaschine müssen Stanzwerkzeug und Stanzrillplatte auf eine exakte Position in Umfangsrichtung gebracht werden. Weiter ist sicherzustellen, dass beide Werkzeuge ohne Schrägung direkt rechtwinklig zur Bogentransportrichtung stehen. Diese Referenzposition nennt sich "erstes Messer". In den nachfolgenden Bearbeitungsstationen müssen die Werkzeuge relativ zur Lage des ersten Messers eingestellt werden, so z. B. das Ausbrechbrett im Ausbrecher und das Nutzentrenngitter in der Nutzentrennstation. Dabei müssen die Werkzeuge jeweils in ihren drei Freiheitsgraden eingestellt werden. Während des Betriebs der Bogenstanz- und -prägemaschine kann es notwendig sein, die Lage der Werkzeuge in der Stanzstation nachzujustieren. Die Werkzeuge in den nachfolgenden Bearbeitungsstationen müssen ebenfalls nacheingestellt werden um diese wieder in die richtige Position relativ zum "ersten Messer" zu bringen.In order to achieve a high product quality of the punched sheets, it is necessary that the sheets and tools are precisely aligned with each other. In the punching station of a sheet punching and embossing machine, the punching tool and punched riddle plate must be brought to an exact position in the circumferential direction. It must also be ensured that both tools are directly perpendicular to the sheet transport direction without skewing. This reference position is called "first knife". In the subsequent processing stations, the tools must be adjusted relative to the position of the first knife, such. B. the stripping board in the breaker and the Nutzentrenngitter in the Nutzentrennstation. The tools must be set in their three degrees of freedom. During operation of the sheet punching and embossing machine, it may be necessary to readjust the position of the tools in the punching station. The tools in the subsequent processing stations must also be readjusted to bring them back into the correct position relative to the "first knife".

Durch diese aufwändige Einstellarbeit der Werkzeuge wird sichergestellt, dass die Bogen passergenau bearbeitet werden. Der Passer beschreibt dabei die Lagegenauigkeit des Druckbilds zu Schnitt-, Rill- und Ausbrechkanten des Bogens. Unterschieden wird dabei zwischen Umfangspasser, d.h. der Lagegenauigkeit in Maschinenlaufrichtung und Seitenpasser, d.h. der Lagegenauigkeit quer zur Maschinenlaufrichtung.This elaborate adjustment work of the tools ensures that the sheets are processed accurately. The register describes the positional accuracy of the printed image at the cutting, creasing and breaking edges of the sheet. A distinction is made between circumferential flow, i. the registration in the machine direction and side registration, i. the positional accuracy transverse to the machine direction.

Nachteilig an dem passergenauen Ausrichten nach dem Stand der Technik ist, dass durch die hohen Rüstzeiten, d.h. durch den hohen Zeitaufwand für die Einstellung der Werkzeuge, die Maschinenproduktivität beeinträchtigt wird.A disadvantage of the register-accurate alignment of the prior art is that due to the high set-up times, i. due to the high time required for the adjustment of the tools, the machine productivity is impaired.

Die DE 10 2006 025 074 A1 offenbart ein Verfahren und eine Vorrichtung zum Zuführen von Bogen an eine Druckmaschine, wobei vorgesehen ist, dass ein Bogen in Bewegung an einer Bogenkante mittels Greifer erfasst wird. Im Greiferschluss wird dann die Bogenlage erfasst und bei Abweichung von einer Solllage eine Korrektur der Bogenlage in bzw. entgegen der Transportrichtung, quer dazu und in Schrägausrichtung vorgenommen. Dann wird der Bogen beschleunigt an ein rotierendes Weitertransportsystem übergeben.The DE 10 2006 025 074 A1 discloses a method and apparatus for feeding sheets to a printing machine, wherein it is provided that a sheet is detected in movement at a sheet edge by means of grippers. In gripper closure, the sheet position is then detected and, in the case of deviation from a desired position, a correction of the sheet position in or against the transport direction, transversely thereto and in oblique alignment is made. Then the sheet is transferred to a rotating onward transport system accelerated.

Aufgabe der vorliegenden Erfindung ist es, eine Bogenstanz- und -prägemaschine zu beschreiben, die geringe Rüstzeiten und eine hohe Produktivität aufweist.The object of the present invention is to describe a sheet punching and embossing machine which has short makeready times and high productivity.

Gelöst wird diese Aufgabe durch ein Verfahren zum Betreiben einer Bogenstanz- und - prägemaschine gemäß Anspruch 1 und eine Bogenstanz- und -prägemaschine gemäß Anspruch 2.This object is achieved by a method for operating a sheet punching and embossing machine according to claim 1 and a sheet punching and embossing machine according to claim 2.

Die Erfindung umfasst ein Verfahren zum Betreiben einer Bogenstanz- und -prägemaschine mit Bogenanleger, mindestens einer Bearbeitungsstation und einem Bogentransportsystem. Ein einzelner Bogen wird vom Bogenstapel durch einen Bogenanleger vereinzelt und läuft über einen Zuführtisch. Dabei wird der Bogen an seiner Vorder- und Seitenkante vorausgerichtet und anschließend durch ein Vorgreifersystem gegriffen. Sobald der Bogen gegriffen ist, wird das Druckbild des Bogens mit einem Messsystem, welches durch Kameras und / oder Sensoren gebildet ist, optisch vermessen. Die Ist-Position des Druckbilds wird mit seiner Soll-Position verglichen. Aus dem Vergleich der Positionswerte werden Korrekturwerte für Schrägbogen, Seitenpasser und Umfangspasser berechnet, welche der Maschinensteuerung zur Verfügung gestellt werden. Die passergenaue Seitenausrichtung des Bogens geschieht durch ein Anlagesystem. Der seitenausgerichtete Bogen wird an Greifer von linear angetriebenen Greiferwagen des Bogentransportsystems übergeben. Durch die Greiferwagen werden die Bogen in die Bearbeitungsstationen transportiert und die Greiferwagen angehalten, sobald sich der Bogen in der Mitte der Bearbeitungsstation befindet. Die Bogenpositionierung geschieht dabei unabhängig vom Bogenformat. Auf diese Positionierung folgen die Schrägbogenausrichtung und die Umfangspasserausrichtung durch inkrementelle Bewegungen der Linearantriebe, welche sich jeweils am äußeren Ende eines Greiferwagens befinden. Sobald der Bogen passerausgerichtet ist, kann der Bogen bearbeitet werden. Die Schritte Bogentransport in die Bearbeitungsstationen mit Bogenpositionierung, Schrägbogen- und Umfangspasserausrichtung und Bogenbearbeitung wiederholen sich für einen jeden Bogen in einer jeweiligen Bearbeitungsstation.The invention comprises a method for operating a sheet punching and embossing machine with sheet feeder, at least one processing station and a sheet transport system. A single sheet is singulated from the sheet pile by a sheet feeder and passes over a feed tray. The bow is pre-aligned at its front and side edges and then gripped by a pre-gripper system. As soon as the sheet is gripped, the printed image of the sheet is optically measured with a measuring system, which is formed by cameras and / or sensors. The actual position of the printed image is compared with its nominal position. From the Comparison of the position values calculates correction values for slanted curves, side registration and circumferential registration, which are made available to the machine control. The register-accurate page orientation of the sheet is done by an investment system. The side-facing sheet is transferred to grippers of linearly driven gripper carriages of the sheet transport system. The gripper carriage transports the sheets to the processing stations and stops the gripper carriages as soon as the sheet is in the middle of the processing station. The sheet positioning happens regardless of the sheet format. This positioning is followed by skew orientation and perimeter registration by incremental movements of the linear drives, each located at the outer end of a gripper carriage. Once the sheet is aligned, the sheet can be processed. The sheet transport steps to the sheet positioning, skew and perimeter register alignment and sheet processing stages are repeated for each sheet in a respective processing station.

Im Einrichtebetrieb der Bogenstanz- und -prägemaschine wird das Verfahren zum Betreiben der Bogenstanz- und -prägemaschine in vorteilhafte Weise um zwei weitere Schritte ergänzt: Ein Probebogen wird zur Kontrolle entnommen, d. h. ein von der Maschine bearbeiteter Bogen wird mit seiner Soll-Bearbeitung verglichen. Entsprechend dem Unterschied zwischen Soll-Bearbeitung und Ist-Bearbeitung werden Korrekturwerte für den Umfangs- und den Schrägpasser in den jeweiligen Bearbeitungsstationen über ein Interface in die Maschinensteuerung eingegeben.In set-up operation of the sheet punching and embossing machine, the method for operating the sheet punching and embossing machine is advantageously supplemented by two further steps: A sample sheet is taken for inspection, d. H. a sheet processed by the machine is compared with its target machining. Corresponding to the difference between target machining and actual machining, correction values for the circumferential and skew register in the respective machining stations are entered into the machine control via an interface.

Eine erfindungsgemäße Bogenstanz- und -prägemaschine besitzt einen Bogenanleger, mindestens eine Stanzstation und mindestens eine weitere Bearbeitungsstation, wie z. B. Ausbrecherstation oder Nutzentrennstation, eine Maschinensteuerung und ein Bogentransportsystem. Das Bogentransportsystem besitzt umlaufende Greiferwagen mit Greiferbrücken, welche mit Greifern ausgestattet sind, um Bogen aus Papier, Pappe und dergleichen an einem Greiferrand zu ergreifen und durch die Maschine hindurch zu bewegen. Angetrieben werden die Greiferwagen an ihren äußeren Enden durch jeweils mindestens einen Linearantrieb. In ihren Bogenhaltepositionen in der Stanzstation und den weiteren Bearbeitungsstationen werden die Bogen jeweils in ihrer Umfangsrichtung und in ihrer Schräglage durch die von Linearantrieben erzeugte inkrementelle Bewegung passerausgerichtet. Die Schrägausrichtung geschieht, indem der - in Bogentransportrichtung betrachtet - rechte und linke Fahrwagen eines Greiferwagens entlang der durch Statorsegmente gebildeten Führungsleisten des Bogentransportsystems ungleich bewegt wird, d.h. indem die Fahrwagen um verschiedene Wegstrecken verfahren werden. Die Seitenausrichtung geschieht durch eine zusätzliche Vorrichtung zur Seitenausrichtung.An inventive sheet punching and embossing machine has a sheet feeder, at least one punching station and at least one further processing station, such. B. Ausbrecherstation or Nutzentrennstation, a machine control and a sheet transport system. The sheet transport system has revolving gripper carriages with gripper bars equipped with grippers for gripping sheets of paper, cardboard and the like on a gripper edge and moving them through the machine. The gripper carriages are driven at their outer ends by at least one linear drive. In their sheet holding positions in the punching station and the other processing stations, the sheets are each in their circumferential direction and in its skew aligned by the incremental motion generated by linear drives. The oblique alignment is done by the - viewed in the sheet transport direction - right and left carriage of a gripper carriage along the guide rails formed by stator segments of the sheet transport system is unevenly moved, ie by the cars are moved to different distances. The page orientation is done by an additional device for page orientation.

In einer vorteilhaften Weiterbildung der Erfindung besitzt die Bogenstanz- und - prägemaschine mindestens vor der ersten Bearbeitungsstation ein optisches Messsystem zur Vermessung der Bogen. Alternativ kann die Bogenstanz- und -prägemaschine auch vor jeder Bearbeitungsstation ein optisches Messsystem besitzen. Das Messsystem benutzt dem Fachmann bekannte Elemente wie Kameras, Laser und Sensoren zur Bestimmung der Bogen-Ist-Position.In an advantageous development of the invention, the sheet punching and embossing machine has an optical measuring system for measuring the sheets at least in front of the first processing station. Alternatively, the sheet punching and embossing machine can also have an optical measuring system in front of each processing station. The measuring system uses elements known to the person skilled in the art, such as cameras, lasers and sensors for determining the actual arc position.

In einer vorteilhaften Ausführungsform der Bogenstanz- und -prägemaschine sind Messsystem, Maschinensteuerung und Bogentransportsystem über Datenleitungen miteinander verbunden, insbesondere durch einen Regelkreis, und Daten können ausgetauscht werden. In einer vorteilhaften Weiterbildung besitzt die Bogenstanz- und - prägemaschine eine Einrichtung zur Positionsermittlung der Greiferwagen. Diese umfasst am Maschinengestell befestigte Sensoren und an den jeweiligen Greiferwagen befestigte Signalgeber. Die von den Signalgebern ausgesendeten Signale werden von den Sensoren empfangen und so die Position eines jeweiligen Greiferwagens bestimmt. Die Sensoren sind dabei insbesondere in den Bearbeitungsstationen und der Stanzstation angebracht.In an advantageous embodiment of the sheet punching and embossing machine measuring system, machine control and sheet transport system are connected to each other via data lines, in particular by a control loop, and data can be exchanged. In an advantageous development, the sheet punching and embossing machine has a device for determining the position of the gripper carriage. This includes sensors attached to the machine frame and signalers attached to the respective gripper carriages. The signals emitted by the signal transmitters are received by the sensors and thus the position of a respective gripper carriage is determined. The sensors are mounted in particular in the processing stations and the punching station.

In einer vorteilhaften Ausführungsform der Bogenstanz- und -prägemaschine sind die Greiferwagen durch die Linearantriebe sowohl vor- als auch zurückbewegbar, d.h. in Bogentransportrichtung, welche durch die Richtung vom Anleger zum Ausleger gegeben ist, als auch in entgegen gesetzter Richtung. Die Zurückbewegung kann insbesondere bei der Bogenausrichtung wie auch bei der Übergabe des Bogens an die Greifer des Greiferwagens vorteilhaft eingesetzt werden und dabei zu einer schnelleren und exakteren Ausrichtung bzw. Übergabe beitragen.In an advantageous embodiment of the sheet punching and embossing machine, the gripper carriage by the linear actuators both forward and be moved back, ie in the sheet transport direction, which is given by the direction from the feeder to the boom, as well as in the opposite direction. The return movement can be advantageously used in particular in the sheet alignment as well as in the transfer of the sheet to the gripper of the gripper carriage and thereby contribute to a faster and more accurate alignment or transfer.

Hinsichtlich weiterer vorteilhafter Ausgestaltungen der Erfindung wird auf die Unteransprüche sowie die Beschreibung eines Ausführungsbeispiels unter Bezugnahme auf die beiliegenden Zeichnungen verwiesen.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.

Ausführungsbeispielembodiment

Die Erfindung soll an Hand eines Ausführungsbeispiels noch näher erläutert werden. Es zeigen in schematischer Darstellung

Fig. 1
eine Bogenstanze
Fig. 2
eine Prinzipskizze der Bogenstanze mit Transportsystem mit Linearantrieb
The invention will be explained in more detail with reference to an embodiment. It show in a schematic representation
Fig. 1
a bow punch
Fig. 2
a schematic diagram of the sheet punching machine with transport system with linear drive

In Figur 1 ist der prinzipielle Aufbau einer Bogenstanz- und -prägemaschine 100 zum Stanzen, Ausbrechen und Ablegen von Bögen aus Papier, Pappe und dergleichen dargestellt. Die Stanz- und Prägemaschine 100 besitzt einen Anleger 1, eine Stanzstation 2, eine Ausbrechstation 3 und einen Ausleger 4, die von einem gemeinsamen Maschinengehäuse 5 getragen und umschlossen werden.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, a breaking station 3 and a boom 4, which are supported and enclosed by a common machine housing 5.

Die Bögen 6 werden durch einen Anleger 1 von einem Stapel vereinzelt und zugeführt und von an Greiferbrücken von Greiferwagen 8 befestigten Greifern an ihrer Vorderkante ergriffen und in Bogentransportrichtung F intermittierend durch die verschiedenen Stationen 2, 3 und 4 der Stanz- und Prägemaschine 100 hindurchgezogen. An den Greiferwagen 8 befinden sich Signalgeber 31, welche beispielsweise als magnetische oder Licht emittierende Elemente ausgestaltet sein können.The sheets 6 are separated by a feeder 1 from a stack and supplied and gripped by gripper bars of gripper carriage 8 grippers at its front edge and intermittently pulled in the sheet transport direction F through the various stations 2, 3 and 4 of the punching and embossing machine 100. On the gripper carriage 8 are signal generator 31, which may be configured, for example, as magnetic or light-emitting elements.

Im Bereich des Zuführtischs 16 zwischen Anleger 1 und Stanzstation 2 befindet sich ein Messsystem 20 zur genauen Vermessung der Position der Bogen 6.In the area of the feed table 16 between feeder 1 and punching station 2 there is a measuring system 20 for precise measurement of the position of the sheets 6.

Die Stanzstation 2 besteht aus einem Untertisch 9 und einem Obertisch 10. Der Untertisch 9 ist fest im Maschinengestell gelagert und mit einer Gegenplatte zum Stanzmesser versehen. Der Obertisch 10 ist vertikal hin- und herbewegbar gelagert.The punching station 2 consists of a lower table 9 and an upper table 10. The lower table 9 is fixedly mounted in the machine frame and provided with a counter plate to the punching knife. The upper table 10 is mounted vertically movable back and forth.

Der Greiferwagen 8 transportiert den Bogen 6 von der Stanz- und Prägestation 2 in die nachfolgende Ausbrechstation 3, die mit Ausbrechwerkzeugen ausgestattet ist. In der Ausbrechstation 3 werden mit Hilfe der Ausbrechwerkzeuge die nicht benötigten Abfallstücke aus dem Bogen 6 nach unten herausgestoßen, wodurch die Abfallstücke 11 in einen unter der Station eingeschobenen behälterartigen Wagen 12 fallen.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.

Von der Ausbrechstation 3 gelangt der Bogen in den Ausleger 4, wo der Bogen entweder nur einfach abgelegt wird, oder aber gleichzeitig eine Trennung der einzelnen Nutzen erfolgt. Der Ausleger 4 kann auch eine Palette 13 enthalten, auf der die einzelnen Bögen in Form eines Stapels 14 aufgestapelt werden, so dass nach Erreichen einer bestimmten Stapelhöhe die Paletten mit den aufgestapelten Bögen 14 aus dem Bereich der Stanz- und Prägemaschine 100 weggefahren werden können.From the stripping station 3, the sheet enters the boom 4, where the sheet 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 are stacked in the form of a stack 14, so that after reaching a certain stack height, the pallets can be moved away with the stacked sheets 14 from the field of punching and embossing machine 100.

In den jeweiligen Bearbeitungsstationen 2, 3, 4 befinden sich Sensoren 30, welche die genaue Position der Greiferwagen 8 ermitteln, indem sie von den Signalgebern 31 der Greiferwagen 8 ausgesendete Signale empfangen. Die von den Sensoren 30 ermittelten Werte werden zur Auswertung an die Maschinensteuerung 15 übertragen. Die Maschinensteuerung 15 besitzt ein Interface zur Darstellung und zur Eingabe von Maschinenparametern.In the respective processing stations 2, 3, 4 are sensors 30, which determine the exact position of the gripper carriage 8 by receiving signals emitted by the signal transmitters 31 of the gripper carriage 8. The values determined by the sensors 30 are transmitted to the machine controller 15 for evaluation. The machine control 15 has an interface for displaying and entering machine parameters.

In Fig. 2 ist der ortsfeste Teil des Bogentransportsystems 7 dargestellt. Das Bogentransportsystem 7 besitzt zwei parallel zueinander ausgerichtete umlaufende Führungsschienen, welche aus einer Vielzahl von Statorsegmenten 40 bestehen. Entlang der Führungsschienen des Bogentransportsystems 7 in Bogentransportrichtung F können Greiferwagen 8 durch die Bearbeitungsstationen 2, 4 verfahren werden. Die Greiferwagen 8 besitzen Anker (in Fig. 2 nicht dargestellt), welche zusammen mit den ortsfesten Statorsegmenten 40 als Linearmotoren wirken.In Fig. 2 the stationary part of the sheet transport system 7 is shown. The sheet transport system 7 has two mutually parallel circumferential guide rails, which consist of a plurality of stator segments 40. Along the guide rails of the sheet transport system 7 in the sheet transport direction F gripper carriage 8 can be moved through the processing stations 2, 4. The gripper carriage 8 have anchors (in Fig. 2 not shown), which act together with the stationary stator 40 as linear motors.

Im Bereich der Bearbeitungsstationen 2, 4 sind die Führungsschienen durch eine hohe Anzahl von Statorsegmenten 40 besonders fein gegliedert. Dadurch ist gewährleistet, dass ein Greiferwagen 8 (in Fig. 2 nicht dargestellt) und der mit Greifern am Greiferrand des Bogens transportierte Bogen 6 passergenau angehalten werden kann. Jedem Statorsegment 40 ist ein Frequenzumrichter (in Fig. 2 nicht dargestellt) zum Aufbau eines Magnetfeldes im Statorsegment 40 zugeordnet, welcher von einer zentralen Steuerung 15 angesteuert wird.In the area of the processing stations 2, 4, the guide rails are particularly finely divided by a large number of stator segments 40. This ensures that a gripper carriage 8 (in Fig. 2 not shown) and transported with grippers on the gripper edge of the sheet sheet 6 can be stopped accurately. Each stator segment 40 is a frequency converter (in Fig. 2 not shown) associated with the construction of a magnetic field in the stator 40, which is controlled by a central controller 15.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Anlegerinvestor
22
Stanzstationpunching station
33
Ausbrechstationstripping
44
Auslegerboom
55
Maschinengehäusemachine housing
66
Bogenbow
77
Transportsystemtransport system
88th
Greiferwagen mit LinearantriebGripper carriage with linear drive
99
Untertischunder table
1010
Obertischovertable
1111
Abfallstücketrimmings
1212
Wagendare
1313
Palettepalette
1414
Auslagestapeldelivery pile
1515
Steuerungcontrol
1616
Zuführtischfeed
2020
Messsystemmeasuring system
3030
Sensorsensor
3131
Signalgebersignaler
4040
Statorsegmentstator
100100
Bogenstanz- und -prägemaschineSheet punching and embossing machine
FF
Förderrichtungconveying direction

Claims (4)

  1. Method of operating a sheet-fed diecutting and embossing machine (100) including a sheet feeder (1), at least one processing station (2, 3, 4) and a sheet transport system (7), comprising the following steps:
    a) a sheet (6) is taken from the sheet stack by the sheet feeder
    b) the sheet (6) passes over the feed table (16)
    c) the sheet (6) is pre-aligned at its front edge and its lateral edge
    d) the sheet (6) is gripped by a pre-gripping system
    e) the printed image of the sheet (6) is optically measured by a measuring system (20)
    f) the printed image is compared to a target position
    g) correction values for skewed sheets, the lateral position and the circumferential position are calculated
    h) laterally aligning the sheet (6) by means of a positioning system
    i) transferring the sheet (6) to gripper carriages (8) of the sheet transport system (7), the gripper carriages (8) being driven by linear drives
    j) transporting the sheet into a processing station (2, 3, 4) positioning the sheet in the centre of the processing station (2, 3, 4) independently of the sheet format
    k) aligning skewed sheets and the circumferential position using linear drives
    l) operating the processing station (2, 3, 4)
    repeating steps j), k) and 1) for a sheet (6) in a respective processing station (2, 3, 4) and comprising the following additional steps during set-up
    m)evaluating a test sheet
    n) correcting the circumferential and lateral positions in the respective processing stations (2, 3, 4) by inputting correction values into the machine control
  2. Sheet-fed diecutting and embossing machine (100)
    characterized in
    that to implement the method according to Claim 1, the sheet-fed diecutting and embossing machine (100) comprises a sheet feeder (1), a stop system for the lateral alignment of the sheets (6), at least one diecutting station (2), at least one further processing station (3, 4), a machine control (15) including an interface for inputting correction values for the circumferential and lateral positions in the respective processing stations (2, 3, 4) and a sheet transport system (7) that includes revolving gripper carriages (8) with gripper bars wherein grippers for gripping the sheets (6) and moving them through the machine (100) are attached to the gripper bar of a gripper carriage (8), and wherein the revolving gripper bars of the gripper carriages (8) are respectively driven at their outer ends by at least one linear drive and each sheet (6) is aligned in the circumferential direction and in terms of its angular position in their stop positions in the at least one diecutting station (2) and in the at least one processing station (3, 4) due to the movement created by the linear drives,
    wherein the sheet-fed diecutting and embossing machine (100) has an optical measuring system (20) for measuring the sheets (6) at least upstream of the first processing station (2) and
    that data are exchangeable between measuring system (20), machine control (15) and sheet transport system (7).
  3. Sheet-fed diecutting and embossing machine according to Claim 2,
    characterized in
    that the sheet-fed diecutting and embossing machine (100) has a device for detecting the position of the gripper carriages, the device comprising sensors (30) fixed to the machine frame and signal transmitters (31) fixed to the respective gripper carriage.
  4. Sheet-fed diecutting and embossing machine according to Claim 2,
    characterized in
    that the gripper carriages (8) are movable back and forth by the linear drives.
EP07112024A 2006-07-26 2007-07-09 Sheet cutting and creasing press with registration alignment and method for operating such a press Active EP1882566B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006034509 2006-07-26
DE102006034511 2006-07-26
DE102007020497A DE102007020497A1 (en) 2006-07-26 2007-04-30 Sheet punching and embossing machine with register alignment and method for operating a sheet punching and embossing machine

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EP1882566A3 EP1882566A3 (en) 2010-06-23
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EP (1) EP1882566B1 (en)
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DE202007012349U1 (en) 2007-12-13
CN101112801B (en) 2011-04-20
US20080022866A1 (en) 2008-01-31
EP1882566A2 (en) 2008-01-30
CN101112801A (en) 2008-01-30
EP1882566A3 (en) 2010-06-23

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