EP1240986A2 - Press-cutting device with suction and blowing means - Google Patents

Press-cutting device with suction and blowing means Download PDF

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Publication number
EP1240986A2
EP1240986A2 EP02005516A EP02005516A EP1240986A2 EP 1240986 A2 EP1240986 A2 EP 1240986A2 EP 02005516 A EP02005516 A EP 02005516A EP 02005516 A EP02005516 A EP 02005516A EP 1240986 A2 EP1240986 A2 EP 1240986A2
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EP
European Patent Office
Prior art keywords
suction
punching
arrangement according
sheet
blower device
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.)
Granted
Application number
EP02005516A
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German (de)
French (fr)
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EP1240986B1 (en
EP1240986B2 (en
EP1240986A3 (en
Inventor
Eugen c/o Offsetdruck Nürnberg GmbH & Co. Wimmer
Thomas c/o Offsetdruck Nürnberg GmbH & Co. Mück
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.)
OFFSETDRUCK NUERNBERG GMBH & CO. PAPIERVERARBEITU
Original Assignee
Offsetdruck Nuernberg & Co Papierverarbeitungs-Kg GmbH
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Application filed by Offsetdruck Nuernberg & Co Papierverarbeitungs-Kg GmbH filed Critical Offsetdruck Nuernberg & Co Papierverarbeitungs-Kg GmbH
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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
    • B26D7/18—Means for removing cut-out material or waste
    • B26D7/1845—Means for removing cut-out material or waste by non mechanical means
    • B26D7/1863—Means for removing cut-out material or waste by non mechanical means by suction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/54—Auxiliary folding, cutting, collecting or depositing of sheets or webs
    • B41F13/56—Folding or cutting

Definitions

  • the invention relates to a punching arrangement mentioned in the preamble of claim 1 Art.
  • the punching of sheets printed multicolored in offset printing is more expedient Way after the last printing unit, because in particular by punching openings in the sheets lose their stability, so that a more precise printing would be difficult or impossible. It should be taken into account that the printable Sheets in offset sheet-fed printing machines as they pass through the respective printing units can only be gripped at their front edge and transported further.
  • Such a punching machine comprises a first cylinder, which is generally has such a large diameter that it is suitable for machining several successive Bow turns only once. It wears on its otherwise smooth outer surface several so-called punched sheets arranged one behind the other in the circumferential direction, the number of which corresponds to the number of arches that this is at a full revolution Stamping cylinders are to be processed. With this arrangement can then in everyone Sheet of a die cut. Should several die cuts be punched in one sheet several stamped sheets can be placed on the lateral surface for each sheet of the punching cylinder arranged and against each other in the circumferential direction and / or be positioned offset in the axial direction.
  • the punching is done in that another cylinder with the punching cylinder a smooth, hard surface that is defined by the gap between the two Presses through the protruding sheet metal burrs.
  • the sheets After punching, the sheets are stacked on top of each other to dry. Is the The drying process has progressed to such an extent that there is no longer any blurring of the Colors can come, so stacks of several sheets are stacked one on top of the other lying diecuts separated by the fact that their connecting webs to the machine with a suitable tool or by hand in a separate sheet Work process.
  • the invention is therefore based on the object of a punching arrangement of the type mentioned Art to create, with the help of printed in an offset sheet-fed press Sheets can be punched so that post-processing is no longer necessary and completely clean, flawless punched edges are created.
  • the invention provides that summarized in claim 1 Characteristics before.
  • the punching tool is designed so that no connecting webs between the die cuts and the rest of the sheet remain, d. H. the die cuts completely punched out become.
  • a is during the operation of the fixed suction device provided immediately above the Surface of the respective arc creates a negative pressure through which the released Die cut is sucked off.
  • the term "fixed during operation” is intended to express be that the device in question does not move during operation, in particular the movements required for conveying and punching the printed sheets does not participate.
  • the fixed positions during operation of both the suction and as well as the blower device to be changed to the rule of Adapt product to product to different positions of the diecuts to be produced.
  • blower device as a suction device, with the help of one on the side of the contact surface opposite the arch generated negative pressure acting through holes provided in the contact surface pulls the bow against the contact surface.
  • the blower device preferably works with overpressure and at least comprises a nozzle that is stationary during operation and is on the same side of the sheet how the suction device is arranged and in the immediate vicinity of the Punching area a gas flow, preferably a compressed air flow against the sheet directs through which it counteracts the effect of the vacuum of the suction device pressed against the contact surface and stabilized there.
  • a punching arrangement 1 comprises two rotating in the direction of arrows R1, R2, each having a steel surface Cylinder 2, 3 of which the larger cylinder 2 on its otherwise completely smooth Shell surface two punching plates 4, 4 arranged diametrically opposite one another wearing.
  • the position of the sheet 6 relative to the punching plates 4, 4 is shown in Fig. 1 so that the diecut is completely within the surface of the sheet 6, so that by the Punching process creates a window that is surrounded on all sides by sheet material.
  • the punching arrangement according to the invention is not limited to this.
  • the Punching plates 4, 4, of which several are also available for each sheet 6 to be processed can be provided, can also be arranged so that at least one of punch them a die cut on the edge of the sheet 6 in question.
  • a suction funnel 8 of a suction device 11 occurs during operation, from which it is sucked off after the complete punching.
  • the suction opening 9 is located actually at a much smaller distance directly above the lateral surface of the cylinder 2, as shown in Fig. 1.
  • the distance of the adapted to the curvature of the cylinder 2 Bottom of the funnel 8 from the lateral surface of the cylinder 2 is between 0.5 cm and 1.5 cm and is preferably about 1 cm.
  • the outlet opening located at the tapered end 10 of the suction funnel 8 opens directly in a suction line 12, which is at its end, not shown, with a negative pressure generating blower device and a collecting device for receiving the extracted die cuts is connected.
  • a slide 13 is provided, by means of which the strength of the Vacuum can be regulated, through which the die cuts are sucked off.
  • this slide is this slide, as shown in Fig. 1, obliquely to the longitudinal axis of the suction line 12 directed that its upper, influencing the width of the passage Edge of the suction funnel 8 is further away. This prevents suction Collect the die cuts on the slide 13 and block the suction line 12.
  • the size of the suction opening 9 of the suction funnel 8 is adjustable to optimally adapt them to different die-cut sizes to be able to ..
  • the punching arrangement 1 further comprises one Blower device 14 fixed during operation, of which only one in FIGS Supply line 16 for compressed air is shown, which in two distribution lines 17, 17 ' opens, each of which in turn leads to two branch lines 18, 19 and 18 ', 19 'for each suction funnel 8, 8' splits, each via a distributor 20 in three flexible nozzle lines 21, 22, 23 and 24, 25, 26 or 21 ', 22', 23 'and 24', 25 ', 26' opens.
  • Each of the nozzle lines 21 to 26 ' carries at its free end a nozzle 30, which is is located at a short distance above the outer surface of the cylinder 2.
  • the distance of the nozzles 30 from the outer surface of the cylinder 2 is preferably in the range from 2 cm to 4 cm.
  • the compressed air emerging from the fixed nozzles 30 during operation, the via a pressure regulator (not shown) provided in the feed line 16 in its Strength can be regulated, presses the sheets 6 passing under the nozzles 30 against the lateral surface of the cylinder 2, so that the sheet 6 despite the negative pressure the respective funnel 8 or 8 'is generated in the area in which the liberated Diecut moves in due to the forward movement of the sheet 6, remains stable and can be transported easily. It is essential that the on its top freshly printed and therefore still wet sheets 6 on this side without contact remains and thus blurring of the colors is avoided.
  • Between each of the manifolds 20 and the associated branch line 18, 19 or 18 ', 19' is one of Manually operated valve 31, 32 or 31 ', 32' provided, with the help of the compressed air supply can be turned off to the relevant nozzles 30.
  • nozzles 30 Commercially available cooling nozzles for drill stands can be used as nozzles 30, whose opening has a diameter of about 5 mm. It has been shown that a Actuation of the nozzles 30 with an overpressure of 4 bar is advantageous.
  • the nozzles 30 are in the immediate vicinity of the Outside surfaces of the suction funnels 8 and 8 'arranged, the inlet openings 9 and 9' are only slightly larger than the die-cut to be extracted. This ensures that the sheet 6 in the immediate vicinity through the compressed air emerging from the nozzles 30 Neighborhood of the area are pressed against the outer surface of the cylinder 2, in which the associated suction funnel 8 generates a vacuum that otherwise could cause the sheet 6 to lift off the outer surface of the cylinder 2. by virtue of the flexibility of the nozzle lines 21 to 25 'allows the nozzles 30 to continue within Regions pivoted and thus their configuration to the contour of the suction opening 9 or 9 'to the associated suction funnel 8 or 8'.
  • 3a and 3b is a cutout 35 and 35 'of the outer surface of a cylinder 2 reproduced, for the sake of clarity the actually curved outer surface section 35 or 35 'is shown.
  • Each of the two surface cutouts 35 or 35 ' carries a punched sheet 4 or 4', the former being designed according to the invention is, while the latter corresponds to the prior art.
  • the two 4, 4 ' are each about 0.8 mm over the outer surface of the cylinder 2 in question in the radial direction in front.
  • the die-cutting was printed in an offset sheet-fed printing press Sheet 6 performed according to the prior art so that in the stamping used punch plates 4 'recesses 36, of which in Fig. 3b in each Side edge is reproduced.
  • the punched part became through these recesses 36 not completely punched out of the sheet in question, but remained on each recess 36 there is a connecting web between the diecut and the rest of the sheet, which later had to be cut by hand.
  • the punching plates 4 are formed continuously so that the punched part is punched out completely.

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  • 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)
  • Details Of Cutting Devices (AREA)
  • Discharge By Other Means (AREA)
  • Massaging Devices (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

The offset printing machine is combined with a stamping machine (1), which makes holes in a printed piece of paper. There is a large drum (2), carrying e.g. two stamping tools (4) with sharp edges. The tools press the paper sheets (6) against a smaller pressure drum (3), so that the sharp edges cut through the paper. The rotation of the drum then carries the paper under a suction hood (8) with nozzles (30) for pressurized air at the sides.

Description

Die Erfindung betrifft eine Stanzanordnung der im Oberbegriff von Anspruch 1 genannten Art.The invention relates to a punching arrangement mentioned in the preamble of claim 1 Art.

Das Stanzen von im Offsetdruck mehrfarbig bedruckten Bogen erfolgt zweckmäßiger Weise nach dem letzten Druckwerk, da insbesondere durch das Stanzen von Öffnungen in den Bogen diese an Stabilität verlieren, so daß ein weiteres paßgenaues Drucken schwierig bzw. unmöglich würde. Dabei ist zu berücksichtigen, daß die zu bedruckenden Bogen in Offset-Bogendruckmaschinen beim Durchlauf durch die jeweiligen Druckwerke immer nur an ihrer Vorderkante ergriffen und weiterbefördert werden.The punching of sheets printed multicolored in offset printing is more expedient Way after the last printing unit, because in particular by punching openings in the sheets lose their stability, so that a more precise printing would be difficult or impossible. It should be taken into account that the printable Sheets in offset sheet-fed printing machines as they pass through the respective printing units can only be gripped at their front edge and transported further.

Da beim Offsetdruck feucht in feucht gedruckt wird, ist es wichtig, daß frisch bedruckte Oberflächenbereiche nur mit Drucktüchern, von denen die Druckfarbe übertragen wird, in Berührung kommen.Because offset printing uses damp to moist, it is important that freshly printed Surface areas only with blankets from which the printing ink is transferred in Come into contact.

Es ist bekannt, hinter dem letzten Druckwerk einer Offset-Druckmaschine ein spezielles Stanzwerk vorzusehen, das ähnlich aufgebaut ist, wie die Druckwerke und mit diesen im Gleichtakt arbeitet. Ein solches Stanzwerk umfaßt einen ersten Zylinder, der im allgemeinen einen so großen Durchmesser aufweist, daß er sich für die Bearbeitung mehrerer aufeinanderfolgender Bogen nur einmal dreht. Er trägt auf seiner ansonsten glatten Mantelfläche mehrere, in Umfangsrichtung hintereinander angeordnete, sogenannte Stanzbleche, deren Anzahl der Anzahl der Bogen entspricht, die bei einer vollen Umdrehung dieses Stanzzylinders bearbeitet werden sollen. Mit dieser Anordnung kann dann in jedem Bogen ein Stanzling angestanzt werden. Sollen mehrere Stanzlinge in einem Bogen angestanzt werden, so können für jeden Bogen auch mehrere Stanzbleche auf der Mantelfläche des Stanzzylinders angeordnet und gegeneinander in Umfangsrichtung und/oder axialer Richtung versetzt positioniert sein.It is known to have a special one behind the last printing unit of an offset printing press To provide punching unit, which is constructed similarly to the printing units and with these in Common mode works. Such a punching machine comprises a first cylinder, which is generally has such a large diameter that it is suitable for machining several successive Bow turns only once. It wears on its otherwise smooth outer surface several so-called punched sheets arranged one behind the other in the circumferential direction, the number of which corresponds to the number of arches that this is at a full revolution Stamping cylinders are to be processed. With this arrangement can then in everyone Sheet of a die cut. Should several die cuts be punched in one sheet several stamped sheets can be placed on the lateral surface for each sheet of the punching cylinder arranged and against each other in the circumferential direction and / or be positioned offset in the axial direction.

Diese bekannten Stanzbleche sind nur etwa 0,8 mm über die glatte Mantelfläche des Stanzzylinders radial vorstehende Grate bzw. Schneiden, deren Kontur die Form des anzustanzenden Stanzlings bestimmt. Mit dem Ausdruck "anstanzen" soll hier zum Ausdruck gebracht werden, daß die Kontur nicht durchgehend ist, sondern Unterbrechungen aufweist, so daß der Stanzling nicht vollständig ausgestanzt wird sondern durch Verbindungsstege, die aufgrund dieser Unterbrechungen zwischen ihm und dem Rest des Bogens stehenbleiben, mit dem Bogen verbunden bleibt. Dies wird weiter unten unter Bezugnahme auf Fig. 3b noch genauer erläutert. These known stamped sheets are only about 0.8 mm over the smooth surface of the Punching cylinder radially protruding ridges or cutting edges, the contour of which is the shape of the punched Die cut. With the expression "punch" should express here brought that the contour is not continuous, but has interruptions, so that the die-cut is not completely punched out but by connecting bars, the one due to these interruptions between him and the rest of the arch stop, remains connected to the arch. This is referred to below 3b explained in more detail.

Das Stanzen erfolgt dadurch, daß gegenüber dem Stanzzylinder ein weiterer Zylinder mit einer glatten, harten Oberfläche angeordnet ist, der die durch den Spalt zwischen den beiden Zylindern hindurchlaufenden Bogen gegen die vorstehenden Stanzblech-Grate drückt.The punching is done in that another cylinder with the punching cylinder a smooth, hard surface that is defined by the gap between the two Presses through the protruding sheet metal burrs.

Nach erfolgtem Stanzen werden die Bogen zum Trocknen aufeinander gestapelt. Ist der Trocknungsvorgang soweit fortgeschritten, daß es nicht mehr zu einem Verwischen der Farben kommen kann, so werden aus mehrere Bogen umfassenden Stapeln die übereinander liegenden Stanzlinge dadurch herausgetrennt, daß ihre Verbindungsstege zu den jeweiligen Bogen mit einem geeigneten Werkzeug maschinell oder von Hand in einem gesonderten Arbeitsgang durchtrennt werden.After punching, the sheets are stacked on top of each other to dry. Is the The drying process has progressed to such an extent that there is no longer any blurring of the Colors can come, so stacks of several sheets are stacked one on top of the other lying diecuts separated by the fact that their connecting webs to the machine with a suitable tool or by hand in a separate sheet Work process.

Dabei ergibt sich das Problem, daß die Stege häufig nicht sauber reißen und sichtbare Reste am Druckprodukt stehen bleiben. Auch können einzelne Stanzlinge an dem zugehörigen Bogen hängenbleiben und sich insbesondere umklappen, wodurch die Weiterverarbeitung behindert wird. Wenn sich ein Stanzblech nach und nach in den Gegendruckzylinder eindrückt, so kann es geschehen, daß die Stanzlinge aus den Bogen nicht mehr heraus gebrochen werden können. Auch ist der zum endgültigen Heraustrennen erforderliche Nachbearbeitungsschritt mit einem zusätzlichen Zeit- und Kostenaufwand verbunden.The problem arises that the webs often do not tear cleanly and are visible Remains of the printed product remain. Individual die cuts can also be made on the associated Sheets get stuck and in particular fold down, which means further processing is hindered. If a stamping plate is gradually in the impression cylinder presses in, so it can happen that the die cuts no longer come out of the sheet can be broken. It is also necessary for the final removal Post-processing step associated with additional time and cost.

Somit liegt der Erfindung die Aufgabe zugrunde, eine Stanzanordnung der eingangs genannten Art zu schaffen, mit deren Hilfe in einer Offset-Bogendruckmaschine bedruckte Bogen so gestanzt werden können, daß eine Nachbearbeitung nicht mehr nötig ist und völlig saubere, einwandfrei Stanzkanten entstehen.The invention is therefore based on the object of a punching arrangement of the type mentioned Art to create, with the help of printed in an offset sheet-fed press Sheets can be punched so that post-processing is no longer necessary and completely clean, flawless punched edges are created.

Zur Lösung dieser Aufgabe sieht die Erfindung die im Anspruch 1 zusammengefaßten Merkmale vor.To achieve this object, the invention provides that summarized in claim 1 Characteristics before.

Zunächst ist das Stanzwerkzeug so ausgebildet, daß keine Verbindungsstege zwischen den Stanzlingen und dem Rest des Bogens verbleiben, d. h. die Stanzlinge völlig freigestanzt werden. Um die Stanzlinge sofort aus dem Stanzwerk zu entfernen, ist eine während des Betriebs feststehende Absaugeinrichtung vorgesehen, die unmittelbar über der Oberfläche des jeweiligen Bogens einen Unterdruck erzeugt, durch den der freiwerdende Stanzling abgesaugt wird.First, the punching tool is designed so that no connecting webs between the die cuts and the rest of the sheet remain, d. H. the die cuts completely punched out become. In order to remove the diecuts from the punching unit immediately, a is during the operation of the fixed suction device provided immediately above the Surface of the respective arc creates a negative pressure through which the released Die cut is sucked off.

Ohne weitere Maßnahmen würde ein solcher Unterdruck allerdings auch den frisch bedruckten und auf seiner Oberseite noch feuchten Bogen von seiner Unterlage abheben und zum Flattern bringen. Um dies zu vermeiden, ist daher gemäß der Erfindung weiterhin eine während des Betriebs feststehende Gebläseeinrichtung vorgesehen, die mit Hilfe eines Gasstroms den Bogen an seine Anlagefläche trotz des von der Absaugeinrichtung erzeugten Unterdrucks andrückt und stabilisiert. Without further measures, such a negative pressure would also apply to the freshly printed one and lift the still wet sheet from its surface on its upper side and make it flutter. To avoid this, therefore, is still according to the invention a fixed blower device is provided during operation, which with the help of a Gas flow the bow to its contact surface despite that generated by the suction device Negative pressure and stabilized.

Mit der Bezeichnung "während des Betriebs feststehend" soll zum Ausdruck gebracht werden, daß sich die betreffende Einrichtung während des Betriebs nicht bewegt, insbesondere die zum Weiterbefördern und Stanzen der Druckbogen erforderlichen Bewegungen nicht mitmacht. Zum Einrichten der Stanzanordnung auf ein neues herzustellendes Druckprodukt können jedoch die während des Betriebes festen Positionen sowohl der Ansaug- als auch der Gebläseeinrichtung verändert werden, um sie an die im Regelfall von Produkt zu Produkt unterschiedlichen Positionen der zu erzeugenden Stanzlinge anzupassen.The term "fixed during operation" is intended to express be that the device in question does not move during operation, in particular the movements required for conveying and punching the printed sheets does not participate. To set up the punching arrangement for a new one to be manufactured Printed product, however, the fixed positions during operation of both the suction and as well as the blower device to be changed to the rule of Adapt product to product to different positions of the diecuts to be produced.

Prinzipiell ist es möglich, die Gebläseeinrichtung ebenfalls als Ansaugeinrichtung auszubilden, die mit Hilfe eines auf der dem Bogen gegenüberliegenden Seite der Anlagefläche erzeugten, durch in der Anlagefläche vorgesehene Löcher hindurch wirkenden Unterdrucks den Bogen gegen die Anlagefläche zieht.In principle, it is possible to also design the blower device as a suction device, with the help of one on the side of the contact surface opposite the arch generated negative pressure acting through holes provided in the contact surface pulls the bow against the contact surface.

Vorzugsweise arbeitet die Gebläseeinrichtung jedoch mit Überdruck und umfaßt wenigstens eine während des Betriebs feststehende Düse, die auf der gleichen Seite des Bogens wie die Ansaugeinrichtung angeordnet ist und in unmittelbarer Umgebung des Stanzbereiches einen Gasstrom, vorzugsweise einen Druckluftstrom gegen den Bogen richtet, durch welchen er entgegen der Wirkung des Unterdrucks der Absaugeinrichtung an die Anlagefläche angedrückt und dort stabilisiert wird.However, the blower device preferably works with overpressure and at least comprises a nozzle that is stationary during operation and is on the same side of the sheet how the suction device is arranged and in the immediate vicinity of the Punching area a gas flow, preferably a compressed air flow against the sheet directs through which it counteracts the effect of the vacuum of the suction device pressed against the contact surface and stabilized there.

Diese und weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen niedergelegt.These and further advantageous embodiments of the invention are in the subclaims resigned.

Die Erfindung wird im folgenden anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnung beschrieben ; in dieser zeigen:

Fig. 1
eine starke schematisierte Seitenansicht einer erfindungsgemäßen Stanzanordnung,
Fig. 2
in verändertem Maßstab eine Ansicht der Stanzanordnung aus Fig. 1 von links her gesehen, und
Fig. 3a und 3b
jeweils eine perspektivische Ansicht eines Stanzbleches gemäß der Erfindung bzw. nach dem Stand der Technik.
The invention is described below using an exemplary embodiment with reference to the drawing; in this show:
Fig. 1
2 shows a strong schematic side view of a punching arrangement according to the invention,
Fig. 2
seen on a modified scale a view of the punching arrangement of FIG. 1 from the left, and
3a and 3b
each a perspective view of a punched sheet according to the invention or according to the prior art.

Wie man den Fig. 1 und 2 entnimmt, umfaßt eine erfindungsgemäße Stanzanordnung 1 zwei in Richtung der Pfeile R1, R2 rotierende, jeweils eine stählerne Mantelfläche aufweisende Zylinder 2, 3 von denen der größere Zylinder 2 auf seiner ansonsten völlig glatten Mantelfläche zwei einander diametral gegenüberliegend angeordnete Stanzbleche 4, 4 trägt. 1 and 2, a punching arrangement 1 according to the invention comprises two rotating in the direction of arrows R1, R2, each having a steel surface Cylinder 2, 3 of which the larger cylinder 2 on its otherwise completely smooth Shell surface two punching plates 4, 4 arranged diametrically opposite one another wearing.

Durch den zwischen den Zylindern 2, 3 gebildeten Spalt, der in Fig. 1 nicht maßstabsgetreu, sondern der Deutlichkeit halber stark vergrößert dargestellt ist, laufen in einer Offset-Druckmaschine frisch bedruckte Bogen 6 hindurch, die dabei in der bei diesen Maschinen üblichen Weise nur an ihrer Vorderkante von einer entsprechenden Greifeinrichtung (nicht dargestellt) gehalten und geführt werden. Die Bogen 6 liegen dabei mit ihrer trockenen Unterseite an der Mantelfläche des größeren Zylinders 2 und den auf dieser Mantelfläche befindlichen Stanzblechen 4, 4 an. Durch die glatte Mantelfläche des kleineren Zylinders 3 werden die Bogen so gegen die radial vorstehenden Stanzbleche 4, 4 (siehe Fig. 3a) gepreßt, daß der von ihrem scharfen Rand umgebene Bereich des Bogens 6 als Stanzling vollständig aus dem Bogen heraus gestanzt wird. Dabei ist angenommen, daß bei jeder Umdrehung des großen Zylinders 2 zwei bedruckte Bogen 6 durch die Stanzanordnung 1 hindurchlaufen, so daß durch die Stanzbleche 4, 4 an zwei aufeinanderfolgenden Bogen 6 jeweils an der gleichen Stelle ein Stanzling freigestanzt wird.Due to the gap formed between the cylinders 2, 3, which is not to scale in FIG. 1, but for the sake of clarity, shown in a greatly enlarged form, run in an offset printing press freshly printed sheets 6 through, which in the case of these machines usual way only on its front edge by a corresponding gripping device (not shown) are held and guided. The sheets 6 lie with their dry Underside on the outer surface of the larger cylinder 2 and on this outer surface punching plates 4, 4 located. Due to the smooth surface of the smaller cylinder 3 the sheets are so against the radially projecting punched sheets 4, 4 (see Fig. 3a) pressed that the area of the sheet 6 surrounded by its sharp edge as a die-cut is completely punched out of the sheet. It is assumed that everyone Rotation of the large cylinder 2 two printed sheets 6 through the punch arrangement 1 run through so that through the punch plates 4, 4 on two successive sheets 6th a die cut is punched out in the same place.

Die Lage des Bogens 6 relativ zu den Stanzblechen 4, 4 ist in Fig. 1 so dargestellt, daß der Stanzling vollständig innerhalb der Fläche des Bogens 6 liegt, so daß durch den Stanzvorgang ein Fenster entsteht, das auf allen Seiten von Bogenmaterial umgeben ist. Die erfindungsgemäße Stanzanordnung ist hierauf jedoch nicht beschränkt. Die Stanzbleche 4, 4, von denen auch für jeden zu bearbeitenden Bogen 6 mehrere vorgesehen sein können, können auch so angeordnet sein, daß wenigstens eines von ihnen einen Stanzling am Rand des betreffenden Bogens 6 wegstanzt.The position of the sheet 6 relative to the punching plates 4, 4 is shown in Fig. 1 so that the diecut is completely within the surface of the sheet 6, so that by the Punching process creates a window that is surrounded on all sides by sheet material. However, the punching arrangement according to the invention is not limited to this. The Punching plates 4, 4, of which several are also available for each sheet 6 to be processed can be provided, can also be arranged so that at least one of punch them a die cut on the edge of the sheet 6 in question.

Wesentlich ist, daß der Stanzling bereits während seines Freiwerdens in die Ansaugöffnung 9 eines unmittelbar hinter dem Spalt zwischen den Zylindern 2, 3 angeordneten, während des Betriebs feststehenden Absaugtrichters 8 einer Absaugeinrichtung 11 eintritt, von der er nach dem völligen Freistanzen abgesaugt wird. Die Ansaugöffnung 9 befindet sich tatsächlich in weit geringerem Abstand direkt über der Mantelfläche des Zylinders 2, als dies die Fig. 1 zeigt. Der Abstand der an die Krümmung des Zylinders 2 angepaßten Unterseite des Trichters 8 von der Mantelfläche des Zylinders 2 liegt zwischen 0,5 cm und 1,5 cm und beträgt vorzugsweise etwa 1 cm.It is essential that the diecut already enters the suction opening while it is being released 9 of a directly behind the gap between the cylinders 2, 3, a suction funnel 8 of a suction device 11 occurs during operation, from which it is sucked off after the complete punching. The suction opening 9 is located actually at a much smaller distance directly above the lateral surface of the cylinder 2, as shown in Fig. 1. The distance of the adapted to the curvature of the cylinder 2 Bottom of the funnel 8 from the lateral surface of the cylinder 2 is between 0.5 cm and 1.5 cm and is preferably about 1 cm.

Die am verjüngten Ende 10 des Absaugtrichters 8 befindliche Austrittsöffnung mündet direkt in eine Absaugleitung 12, die an ihrem nicht dargestellten Ende mit einer einen Unterdruck erzeugenden Gebläseeinrichtung sowie einer Sammeleinrichtung zum Aufnehmen der abgesaugten Stanzlinge verbunden ist.The outlet opening located at the tapered end 10 of the suction funnel 8 opens directly in a suction line 12, which is at its end, not shown, with a negative pressure generating blower device and a collecting device for receiving the extracted die cuts is connected.

In der Absaugleitung 12 ist ein Schieber 13 vorgesehen, mit dessen Hilfe die Stärke des Unterdrucks reguliert werden kann, durch den die Stanzlinge abgesaugt werden. Vorzugsweise ist dieser Schieber, wie in Fig. 1 gezeigt, so schräg zur Längsachse der Absaugleitung 12 gerichtet, daß seine obere, die Weite des Durchlasses beeinflussende Kante vom Absaugtrichter 8 weiter entfernt ist. Dadurch wird verhindert, daß sich abgesaugte Stanzlinge am Schieber 13 ansammeln und die Absaugleitung 12 verstopfen können. In the suction line 12, a slide 13 is provided, by means of which the strength of the Vacuum can be regulated, through which the die cuts are sucked off. Preferably is this slide, as shown in Fig. 1, obliquely to the longitudinal axis of the suction line 12 directed that its upper, influencing the width of the passage Edge of the suction funnel 8 is further away. This prevents suction Collect the die cuts on the slide 13 and block the suction line 12.

Vorteilhafter Weise kann vorgesehen sein, daß die Größe der Ansaugöffnung 9 des Ansaugtrichters 8 verstellbar ist, um sie an unterschiedliche Stanzlingsgrößen optimal anpassen zu können..It can advantageously be provided that the size of the suction opening 9 of the suction funnel 8 is adjustable to optimally adapt them to different die-cut sizes to be able to ..

Um zu verhindern, daß der mit Hilfe der Absaugeinrichtung 11 über dem Bogen 6 erzeugte Unterdruck den nur an seiner in Fig. 1 linken Vorderkante gehaltenen Bogen 6 destabilisiert und insbesondere zum Flattern bringt, umfaßt die Stanzanordnung 1 weiterhin eine während des Betriebs feststehende Gebläseeinrichtung 14, von der in den Fig. 2 nur eine Zuführleitung 16 für Druckluft wiedergegeben ist, die in zwei Verteilerleitungen 17, 17' mündet, von denen sich jede wiederum in zwei Verzweigungsleitungen 18, 19 bzw. 18', 19' für jeden Absaugtrichter 8, 8' aufspaltet, die jeweils über ein Verteilerstück 20 in drei flexible Düsenleitungen 21, 22, 23 und 24, 25, 26 bzw. 21', 22', 23' und 24', 25', 26' mündet. Jede der Düsenleitungen 21 bis 26' trägt an ihrem freien Ende eine Düse 30, die sich in einem geringen Abstand über der Mantelfläche des Zylinders 2 befindet.To prevent that generated with the help of the suction device 11 over the sheet 6 Vacuum destabilizes the sheet 6 held only on its left front edge in FIG. 1 and in particular causes it to flutter, the punching arrangement 1 further comprises one Blower device 14 fixed during operation, of which only one in FIGS Supply line 16 for compressed air is shown, which in two distribution lines 17, 17 ' opens, each of which in turn leads to two branch lines 18, 19 and 18 ', 19 'for each suction funnel 8, 8' splits, each via a distributor 20 in three flexible nozzle lines 21, 22, 23 and 24, 25, 26 or 21 ', 22', 23 'and 24', 25 ', 26' opens. Each of the nozzle lines 21 to 26 'carries at its free end a nozzle 30, which is is located at a short distance above the outer surface of the cylinder 2.

Der Abstand der Düsen 30 von der Mantelfläche des Zylinders 2 liegt vorzugsweise im Bereich von 2 cm bis 4 cm.The distance of the nozzles 30 from the outer surface of the cylinder 2 is preferably in the range from 2 cm to 4 cm.

Die aus den während des Betriebs feststehenden Düsen 30 austretende Druckluft, die über einen in der Zuführleitung 16 vorgesehenen Druckregler (nicht dargestellt) in ihrer Stärke geregelt werden kann, drückt die unter den Düsen 30 hindurch laufenden Bogen 6 gegen die Mantelfläche des Zylinders 2 an, so daß die Bogen 6 trotz des Unterdrucks, den der jeweilige Trichter 8 bzw. 8' in dem Bereich erzeugt, in welchen sich der frei werdende Stanzling aufgrund der Vorwärtsbewegung des Bogens 6 hinein bewegt, stabil bleibt und problemlos weiterbefördert werden kann. Wesentlich ist dabei, daß der auf seiner Oberseite frisch bedruckte und daher noch feuchte Bogen 6 auf dieser Seite berührungsfrei bleibt und somit ein Verwischen der Farben vermieden wird. Zwischen jedem der Verteilerstücke 20 und der zugehörigen Verzweigungsleitung 18, 19 bzw. 18', 19' ist ein von Hand betätigbares Ventil 31, 32 bzw. 31', 32' vorgesehen, mit dessen Hilfe die Druckluftzufuhr zu den betreffenden Düsen 30 abgestellt werden kann.The compressed air emerging from the fixed nozzles 30 during operation, the via a pressure regulator (not shown) provided in the feed line 16 in its Strength can be regulated, presses the sheets 6 passing under the nozzles 30 against the lateral surface of the cylinder 2, so that the sheet 6 despite the negative pressure the respective funnel 8 or 8 'is generated in the area in which the liberated Diecut moves in due to the forward movement of the sheet 6, remains stable and can be transported easily. It is essential that the on its top freshly printed and therefore still wet sheets 6 on this side without contact remains and thus blurring of the colors is avoided. Between each of the manifolds 20 and the associated branch line 18, 19 or 18 ', 19' is one of Manually operated valve 31, 32 or 31 ', 32' provided, with the help of the compressed air supply can be turned off to the relevant nozzles 30.

Als Düsen 30 können im Handel erhältliche Kühldüsen für Bohrständer verwendet werden, deren Öffnung einem Durchmesser von etwa 5 mm besitzt. Es hat sich gezeigt, daß eine Beaufschlagung der Düsen 30 mit einem Überdruck von 4 Bar vorteilhaft ist.Commercially available cooling nozzles for drill stands can be used as nozzles 30, whose opening has a diameter of about 5 mm. It has been shown that a Actuation of the nozzles 30 with an overpressure of 4 bar is advantageous.

Wie man den Fig. 1 und 2 entnimmt, sind die Düsen 30 in unmittelbarer Nachbarschaft der Außenflächen der Absaugtrichter 8 bzw. 8' angeordnet, deren Eintrittsöffnungen 9 bzw. 9' nur geringfügig größer sind als der jeweils abzusaugende Stanzling. Dadurch ist gewährleistet, daß die Bogen 6 durch die aus den Düsen 30 austretende Druckluft in unmittelbarer Nachbarschaft des Bereiches an die Mantelfläche des Zylinders 2 angedrückt werden, in welchem der zugehörige Absaugtrichter 8 einen Unterdruck erzeugt, der ansonsten dazu führen könnte, den Bogen 6 von der Mantelfläche des Zylinders 2 abzuheben. Aufgrund der Flexibilität der Düsenleitungen 21 bis 25' können die Düsen 30 innerhalb weiter Bereiche verschwenkt und somit ihre Konfiguration an die Kontur der Ansaugöffnung 9 bzw. 9' bis zugehörigen Absaugtrichters 8 bzw. 8' angepaßt werden.1 and 2, the nozzles 30 are in the immediate vicinity of the Outside surfaces of the suction funnels 8 and 8 'arranged, the inlet openings 9 and 9' are only slightly larger than the die-cut to be extracted. This ensures that the sheet 6 in the immediate vicinity through the compressed air emerging from the nozzles 30 Neighborhood of the area are pressed against the outer surface of the cylinder 2, in which the associated suction funnel 8 generates a vacuum that otherwise could cause the sheet 6 to lift off the outer surface of the cylinder 2. by virtue of the flexibility of the nozzle lines 21 to 25 'allows the nozzles 30 to continue within Regions pivoted and thus their configuration to the contour of the suction opening 9 or 9 'to the associated suction funnel 8 or 8'.

Wie man insbesondere der Fig. 2 entnimmt, können auch mehrere Stanzlinge gleichzeitig aus dem Bogen 6 ausgestanzt werden, wobei dann vorzugsweise für jeden Stanzling ein eigener Absaugtrichter 8, 8' mit den zugehörigen Düsenleitungen 21 bis 26 bzw. 21 bis 26' vorgesehen ist.As can be seen in particular from FIG. 2, several diecuts can also be used simultaneously are punched out of the sheet 6, then preferably one for each diecut separate suction funnel 8, 8 'with the associated nozzle lines 21 to 26 or 21 to 26' is provided.

In den Fig. 3a und 3b ist jeweils ein Ausschnitt 35 bzw. 35' der Mantelfläche eines Zylinders 2 wiedergegeben, wobei der Deutlichkeit halber der eigentlich gekrümmte Mantelflächenausschnitt 35 bzw. 35' eben dargestellt ist. Jede der beiden Mantelflächenausschnitte 35 bzw. 35' trägt ein Stanzblech 4 bzw. 4', wobei ersteres gemäß der Erfindung ausgebildet ist, während letzteres dem Stand der Technik entspricht. Die beiden 4, 4' stehen jeweils etwa 0,8 mm über die Mantelfläche des betreffenden Zylinders 2 in radialer Richtung vor.3a and 3b is a cutout 35 and 35 'of the outer surface of a cylinder 2 reproduced, for the sake of clarity the actually curved outer surface section 35 or 35 'is shown. Each of the two surface cutouts 35 or 35 'carries a punched sheet 4 or 4', the former being designed according to the invention is, while the latter corresponds to the prior art. The two 4, 4 'are each about 0.8 mm over the outer surface of the cylinder 2 in question in the radial direction in front.

Wie eingangs erwähnt, wurde das Stanzen von in einer Offset-Bogendruckmaschine bedruckten Bogen 6 nach dem Stand der Technik so durchgeführt, daß die im Stanzwerk verwendeten Stanzbleche 4' Aussparungen 36 aufwiesen, von denen in Fig. 3b in jeder Seitenkante eine wiedergegeben ist. Durch diese Aussparungen 36 wurde der Stanzling nicht vollständig aus den betreffenden Bogen freigestanzt, sondern es blieb an jeder Aussparung 36 ein Verbindungssteg zwischen dem Stanzling und dem Rest des Bogens stehen, der dann später von Hand durchgetrennt werden mußte.As mentioned at the beginning, the die-cutting was printed in an offset sheet-fed printing press Sheet 6 performed according to the prior art so that in the stamping used punch plates 4 'recesses 36, of which in Fig. 3b in each Side edge is reproduced. The punched part became through these recesses 36 not completely punched out of the sheet in question, but remained on each recess 36 there is a connecting web between the diecut and the rest of the sheet, which later had to be cut by hand.

Demgegenüber sind, wie in Fig. 3a gezeigt, bei der erfindungsgemäßen Stanzanordnung die Stanzbleche 4 durchgehend ausgebildet, so daß der Stanzling völlig freigestanzt wird.In contrast, as shown in Fig. 3a, in the punching arrangement according to the invention the punching plates 4 are formed continuously so that the punched part is punched out completely.

Claims (13)

Stanzanordnung (1), die zum Stanzen von in einer Offset-Bogendruckmaschine mit wenigstens einem Druckwerk bedruckten Bogen (6) wenigstens ein Stanzwerkzeug (4) umfaßt,
dadurch gekennzeichnet, daß das Stanzwerkzeug (4) so ausgebildet ist, daß es den betreffenden Stanzling völlig freistanzt, und
daß eine mit Unterdruck arbeitende Absaugeinrichtung (11) für die Stanzlinge und eine Gebläseeinrichtung (14) vorgesehen sind, die den bedruckten Bogen (6) während des Absaugens mit Hilfe eines Gasstroms an einer Anlagefläche stabilisiert, wobei die Absaugeinrichtung (11) und die Gebläseeinrichtung (14) während des Betriebs feststehend angeordnet sind.Punching arrangement (1) which comprises at least one punching tool (4) for punching sheets (6) printed in an offset sheet-fed printing press with at least one printing unit,
characterized in that the punching tool (4) is designed in such a way that it completely stamps the punched piece in question, and
that a vacuum device (11) for the diecuts and a blower device (14) are provided which stabilize the printed sheet (6) during suction with the help of a gas stream on a contact surface, the suction device (11) and the blower device ( 14) are stationary during operation. Stanzanordnung nach Anspruch 1, dadurch gekennzeichnet, daß sie als automatisch arbeitende Einheit ausgebildet und hinter dem wenigstens einen Druckwerk angeordnet ist, um im Gleichtakt mit diesem aus bzw. von den bedruckten Bogen (6) wenigstens einen Stanzling aus - bzw. abzustanzen.Stamping arrangement according to Claim 1, characterized in that it is designed as an automatically operating unit and is arranged behind the at least one printing unit in order to punch or punch out at least one stamped part from or from the printed sheets (6) in synchronism with it. Stanzanordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Absaugeinrichtung (11) wenigstens einen während des Betriebs feststehenden Absaugtrichter (8) umfaßt, dessen enge Austrittsöffnung in eine zum Wegfördern der abgesaugten Stanzlinge dienende Absaugleitung (12) mündet, während seine weite Ansaugöffnung (9) in unmittelbarer Nähe der Bewegungsbahn der einen Oberfläche des bedruckten Bogens (6) direkt hinter dem Arbeitsbereich des Stanzwerkzeugs (4) angeordnet ist.Punching arrangement according to Claim 1 or 2, characterized in that the suction device (11) comprises at least one suction funnel (8) which is stationary during operation, the narrow outlet opening of which opens into a suction line (12) which serves to convey the sucked-out punched pieces away, while its wide suction opening ( 9) is arranged in the immediate vicinity of the path of movement of one surface of the printed sheet (6) directly behind the working area of the punching tool (4). Stanzanordnung nach Anspruch 3, dadurch gekennzeichnet, daß die Größe des Querschnitts der Ansaugöffnung (9) des wenigstens einen Absaugtrichters (8) etwas größer als der von ihm abzusaugende Stanzling ist.Punching arrangement according to claim 3, characterized in that the size of the cross section of the suction opening (9) of the at least one suction funnel (8) is somewhat larger than the punched piece to be sucked off by it. Stanzanordnung nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß die Größe der Ansaugöffnung (9) des Ansaugtrichters (8) verstellbar ist.Punching arrangement according to claim 3 or 4, characterized in that the size of the suction opening (9) of the suction funnel (8) is adjustable. Stanzanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Gebläseeinrichtung (14) wenigstens eine während des Betriebs feststehende Düse (30) umfaßt, die einen Gasstrahl gegen die Oberfläche des bedruckten Bogens (6) richtet, über der sich die Ansaugöffnung (9) des Absaugtrichters (8) befindet.Stamping arrangement according to one of the preceding claims, characterized in that the blower device (14) comprises at least one nozzle (30) which is stationary during operation and which directs a gas jet against the surface of the printed sheet (6) over which the suction opening (9) of the suction funnel (8). Stanzanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Gebläseeinrichtung (14) mehrere während des Betriebs feststehende Düsen (30) umfaßt, die jeweils einen Gasstrahl gegen die Oberfläche des bedruckten Bogens (6) richten, über der sich die Ansaugöffnung (9) des Absaugtrichters (8) befindet, und die in etwa gleichförmig um den Umfang der Ansaugöffnung (9) des wenigstens einen Absaugtrichters (8) herum angeordnet sind.Stamping arrangement according to one of the preceding claims, characterized in that the blower device (14) comprises a plurality of nozzles (30) which are stationary during operation, each of which directs a gas jet against the surface of the printed sheet (6) over which the suction opening (9) of the suction funnel (8), and which are arranged approximately uniformly around the circumference of the suction opening (9) of the at least one suction funnel (8). Stanzanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das in der Gebläseeinrichtung (14) strömende Gas Luft ist.Punching arrangement according to one of the preceding claims, characterized in that the gas flowing in the blower device (14) is air. Stanzanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zwei Zylinder (2, 3) vorgesehen sind, zwischen denen die bedruckten Bogen (6) hindurchlaufen und von denen der eine Zylinder (2) auf seiner ansonsten glatten Umfangsoberfläche eine der Anzahl der zu erzeugenden Stanzlinge entsprechende Anzahl von Stanzblechen (4, 4') trägt, während der andere, eine völlig glatte Umfangsoberfläche aufweisende Zylinder (3) als Gegendruckzylinder zum Andrücken der Bogen (6) gegen die Stanzbleche (4, 4') dient.Punching arrangement according to one of the preceding claims, characterized in that two cylinders (2, 3) are provided, between which the printed sheets (6) pass and of which one cylinder (2) has one of the number of those to be produced on its otherwise smooth peripheral surface Die-cut parts carry the corresponding number of die-cut plates (4, 4 '), while the other cylinder (3), which has a completely smooth peripheral surface, serves as a counter-pressure cylinder for pressing the sheets (6) against the die-cut plates (4, 4'). Stanzanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß für jeden zu erzeugenden Stanzling ein eigener Absaugtrichter (8, 8') vorgesehen ist.Punching arrangement according to one of the preceding claims, characterized in that a separate suction funnel (8, 8 ') is provided for each punched article to be produced. Stanzanordnung nach Anspruch 10, dadurch gekennzeichnet, daß die Gebläseeinrichtung (14) wenigstens eine Düse umfaßt, deren Gasstrahl den bedruckten Bogen im Umfangsbereich der Ansaugöffnungen von wenigstens zwei Absaugtrichtern (8, 8') an der Anlagefläche stabilisiert.Stamping arrangement according to claim 10, characterized in that the blower device (14) comprises at least one nozzle, the gas jet of which stabilizes the printed sheet in the peripheral region of the suction openings of at least two suction funnels (8, 8 ') on the contact surface. Stanzanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sich die Anlagefläche mit dem jeweils durch die Gebläseeinrichtung (14) an ihr stabilisierten bedruckten Bogen (6) mitbewegt.Stamping arrangement according to one of the preceding claims, characterized in that the contact surface moves with the printed sheet (6) stabilized on it by the blower device (14). Stanzanordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie bei einer mehrere Druckwerke umfassenden Offset-Bogendruckmaschine hinter dem letzten Druckwerk angeordnet ist.Stamping arrangement according to one of the preceding claims, characterized in that it is arranged behind the last printing unit in an offset sheet-fed printing machine comprising a plurality of printing units.
EP02005516A 2001-03-12 2002-03-11 Press-cutting device with suction and blowing means Expired - Lifetime EP1240986B2 (en)

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ATE341428T1 (en) 2006-10-15
EP1240986B1 (en) 2006-10-04
DE20104247U1 (en) 2001-09-06
DE50208301D1 (en) 2006-11-16
CZ297940B6 (en) 2007-05-02
EP1240986B2 (en) 2010-01-27
CZ2002886A3 (en) 2002-10-16
EP1240986A3 (en) 2004-05-19

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