EP0653313B1 - Method of manufacturing a tubular printing plate - Google Patents

Method of manufacturing a tubular printing plate Download PDF

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Publication number
EP0653313B1
EP0653313B1 EP94117571A EP94117571A EP0653313B1 EP 0653313 B1 EP0653313 B1 EP 0653313B1 EP 94117571 A EP94117571 A EP 94117571A EP 94117571 A EP94117571 A EP 94117571A EP 0653313 B1 EP0653313 B1 EP 0653313B1
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EP
European Patent Office
Prior art keywords
blank
register
plate
sleeve
shaped
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.)
Expired - Lifetime
Application number
EP94117571A
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German (de)
French (fr)
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EP0653313A1 (en
Inventor
Eduard Dr. Hoffmann
Johann Winterholler
Wolfgang Prem
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Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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Publication date
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Publication of EP0653313A1 publication Critical patent/EP0653313A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/18—Curved printing formes or printing cylinders
    • B41C1/182—Sleeves; Endless belts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/36—Means for registering or alignment of print plates on print press structure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49544—Roller making
    • Y10T29/4956—Fabricating and shaping roller work contacting surface element

Definitions

  • the invention relates to a method for producing a sleeve-shaped printing form, especially for offset printing a metallic material for a forme cylinder Printing machine, starting from a plate-shaped blank, which is clamped in register in a welding device and there the opposite, the beginning and end of the printing form forming plate edges welded by means of a laser beam be so that a printing form sleeve with coherent Circumferential surface arises.
  • DE-A-38 28 341 describes a method for welding sheet metal parts by means of a laser, spatial also on spatially shaped sheet metal parts winding welds can be made clean. This will be two Sheet metal parts with mutually overlapping hems in a holding device held immovable to each other. By means of a laser beam in one joint trimming step cuts both sheet metal parts simultaneously. Then their altitudes measured to the component surface changed to the opposing abutting edges of the two sheet metal parts to be able to weld together.
  • the object underlying the present invention is to be seen in that to improve the generic method in that the tin snips dispensed with and a cost saving can be achieved and still a exact dimensional cutting of the plate-shaped blank is guaranteed.
  • the blank 1 is in the form of a plate made of a metallic Workpiece, which is usually in the form of a tape, in which the Width corresponding to the particular forme cylinder and rough in the length greater than that for the perimeter of the printing form Cut the intended size.
  • the plate punch provides at the same time the blank 1 in the area to be joined Plate edges 5 a, 5 b with outside the intended printing area a register device in the form of a fitting hole system. It understands yourself that any kind of attacks, markings or other aids with which an appropriate fixation or Alignment of the plate edges 5 a, 5 b in the welding device is guaranteed, would be just as suitable.
  • the device for rounding the plate-shaped blank 1 is in known manner with retaining strips 2 a, 2 b in the form of Squeegees with a small distance over the entire length distributed, integrated adjustable and removable vacuum cups 3 designed to hold the blank 1. Furthermore are the suction bars 2 a, 2 b with pin registers 4 a, 4 b correct centering in the fitting hole system of the plate-shaped Cut 1 equipped.
  • the fixation in register can also be used for plate-shaped fixtures Cut without a pre-punched pass hole system and in the further method steps of the invention Blank to be welded to a sleeve by the blank is inserted into the welding device with sufficient protrusion, the two retaining strips with a smaller distance than that theoretically correct length of the printing form and then positioned be moved to the correct length to tighten the plate.
  • Vacuum suction cup 3 used.
  • the plate material consists of a magnetizable metal is used to fix the blank in the Welding device a magnetic device is also conceivable. In principle, you can insert the printing form in register however, a mechanical clamping device can also be used.
  • a laser beam 6 a, 6 b is used as a cutter and for true-to-size lengths of the blank 1 on both sides Plate edges 5 a, 5 b used (Fig. 5).
  • Laser cutting of flat sheets, even in complicated ones Contours and sharp corners is state of the art. Corresponding the light beam obeys the laws of Optics. So it can be guided with mirrors and lenses and change in cross section almost arbitrarily.
  • the advantage of the laser as a cutting device is mainly in the very low thermal damage to the cut edges, the high Cutting speed with constant quality and Possibility to automate the process.
  • Fig. 6 shows the overlap-free merging of the beginning and the end of the plate edges that are cut to size 8 a, 8 b, which are now welded together.
  • welding is again carried out with a focused laser beam 9 the heat exposure is limited to a narrow zone, and the Laser beam can penetrate deep into the material. Heat load and warpage of the weld metal are compared to other thermal Procedure extremely low.
  • the dimensionally accurate laser cutting in the welding device can there is no need for an external shear.
  • the for register recording of the plate blank 1 in the Welding device necessary register punchings in the sheet after fixing by the retaining strips 2 a, 2 b superfluous and can be cut to length after laser cutting can be removed together with the waste pieces 7 a, 7 b. This creates a closed sleeve surface, on which no print media is interfering in the Punching out punches.
  • Another particular advantage is the fact that the laser-cut plate edges 8 a, 8 b, due to the Process relatedness of laser cutting and laser welding can be optimally coordinated, so that even a optimal weld quality is created.
  • To apply the printing form sleeve to the forme cylinder can known facilities such.
  • the sleeve is expanded by means of compressed air on the Form cylinder pushed on.
  • the removal of the compressed air causes a positive adhesion of the printing form on the form cylinder.
  • the Coating and exposure of the printing form can on the one hand before Welding the plate-shaped blank outside the printing press by photochemical means, on the other hand after postponing the Printing form sleeve by placing the printing form on the form cylinder all around is coated and exposed.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Laser Beam Processing (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Printing Plates And Materials Therefor (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Herstellung einer hülsenförmigen Druckform, insbesondere für den Offset-Druck aus einem metallischen Werkstoff für einen Formzylinder einer Druckmaschine, ausgehend von einem plattenförmigen Zuschnitt, der in eine Schweißvorrichtung registergerecht eingespannt wird und dort die sich gegenüberstehenden, den Anfang und Ende der Druckform bildenden Plattenkanten mittels eines Laserstrahls verschweißt werden, so daß eine Druckform-Hülse mit zusammenhängender Umfangsfläche entsteht.The invention relates to a method for producing a sleeve-shaped printing form, especially for offset printing a metallic material for a forme cylinder Printing machine, starting from a plate-shaped blank, which is clamped in register in a welding device and there the opposite, the beginning and end of the printing form forming plate edges welded by means of a laser beam be so that a printing form sleeve with coherent Circumferential surface arises.

Eine durch ein gattungsbildendes Verfahren hergestellte Offset-Druckform-Hülse ist bereits in der älteren deutschen Patentanmeldung P41 40 768 offenbart. Diese Hülse ist in Verbindung mit einem kanal- und spannsegmentlosen Formzylinder, der z. B. bereits aus der deutschen Patentschrift DE-PS 27 00 118 bekannt ist, einsetzbar. Dazu wird eine Platte sowohl auf das dem Umfang als auch auf das der Breite des Formzylinders entsprechende Maß zugeschnitten und mit einer Registereinrichtung in Form eines Paßloch-Systems mittels einer Plattenstanze versehen. Der maßhaltige Zuschnitt, der genau abgelängt sein muß, erfolgt mittels einer speziellen Blechschere und wird danach registerhaltig in Form einer Hülse in eine Schweißvorrichtung eingespannt. Nun können die den Anfang und das Ende der Druckform bildende Plattenkanten mittels eines vorzugsweise Neodym-YAG-Lasers miteinander längsverschweißt werden. A manufactured by a generic method Offset printing form sleeve is already in the older German Patent application P41 40 768 disclosed. This sleeve is in Connection with a forme cylinder without channel and clamping segment, the z. B. already from the German patent DE-PS 27 00 118 is known, can be used. For this, a plate is placed on both the circumference as well as that of the width of the forme cylinder appropriate size cut and with a register device provided in the form of a fitting hole system using a plate punch. The dimensionally accurate cut, which must be cut to length, takes place using special tin snips and then in register in the form of a sleeve in a welding device clamped. Now you can see the beginning and the end of the Plate edges forming the printing form by means of a preferably Neodymium YAG lasers are longitudinally welded together.

Mit der DE 43 11 078 A1 ist weiterhin eine Vorrichtung, die lediglich ein Einlegen der zugeschnittenen Platte erfordert und nach der Platteneinlage den Rundungsvorgang der Platte zur Hülsenform und die genaue registerhaltige Positionierung der den Anfang und das Ende der Druckform bildende Plattenkanten zum Laserverschweißen ermöglicht, bekannt gemacht worden.With DE 43 11 078 A1 there is also a device that merely inserts the cut plate requires and after the plate insert the rounding process the plate to the sleeve shape and the exact register-based positioning of the Plate edges forming the beginning and end of the printing form Laser welding enabled, made known.

Die zum maßhaltigen Ablängen, das sehr genau vorgenommen werden muß, des plattenförmigen Zuschnittes verwendete Blechschere ist teuer.The to true to length, which must be done very precisely, the Plate shear used is expensive.

Die DE-A-38 28 341 beschreibt ein Verfahren zum Verschweißen von Blechteilen mittels eines Lasers, wobei auch an räumlich geformten Blechteilen räumlich gewundene Schweißnähte sauber hergestellt werden können. Dazu werden zwei Blechteile mit sich gegenseitig überlappenden Säumen in einer Haltevorrichtung unverrückbar zueinander gehalten. Mittels eines Laserstrahls werden in einem gemeinsamen Besäumungschritt beide Blechteile gleichzeitig durchtrennt. Anschließend werden ihre zur Bauteiloberfläche gemessenen Höhenlagen verändert, um die sich gegenüberstehenden Stoßkanten der beiden Blechteile miteinander verschweißen zu können.DE-A-38 28 341 describes a method for welding sheet metal parts by means of a laser, spatial also on spatially shaped sheet metal parts winding welds can be made clean. This will be two Sheet metal parts with mutually overlapping hems in a holding device held immovable to each other. By means of a laser beam in one joint trimming step cuts both sheet metal parts simultaneously. Then their altitudes measured to the component surface changed to the opposing abutting edges of the two sheet metal parts to be able to weld together.

Die der vorliegenden Erfindung zugrunde liegende Aufgabe ist darin zu sehen, das gattungsbildende Verfahren dahingehend zu verbessern, daß auf die Blechschere verzichtet und eine Kosteneinsparung erreicht werden kann und dennoch ein exaktes maßhaltiges Ablängen des plattenförmigen Zuschnittes gewährleistet bleibt.The object underlying the present invention is to be seen in that to improve the generic method in that the tin snips dispensed with and a cost saving can be achieved and still a exact dimensional cutting of the plate-shaped blank is guaranteed.

Diese Aufgabe wird durch die Verfahrensschritte im kennzeichnenden Teil des Patentanspruchs 1 gelöst.This task is accomplished through the procedural steps in the characterizing part of the Claim 1 solved.

Vorteilhafte Ausgestaltungen der Erfindung sind den Unteransprüchen zu entnehmen. Advantageous embodiments of the invention are set out in the subclaims remove.

Nachfolgend sind die einzelnen Verfahrensschritte der Erfindung anhand eines Ausführungsbeispiels und der Zeichnung erklärt. Es zeigt stark schematisiert:

Fig. 1
die unbelegte Vorrichtung zum Runden des plattenförmigen Zuschnitts,
Fig. 2
das registerhaltige Einlegen des planen Zuschnitts in die Vorrichtung zum Runden.
Fig. 3
den Rundungsvorgang,
Fig. 4
das registerhaltige Positionieren der zu verbindenden Plattenkanten des Zuschnitts,
Fig. 5
das maßhaltige Ablängen des Zuschnitts, das Entfernen der Abfallstücke,
Fig. 6
das überlappungsfreie Zusammenführen der den Anfang und Ende der Druckform bildenden Plattenkanten und anschließenden Verschweißen der Plattenkanten.
The individual method steps of the invention are explained below using an exemplary embodiment and the drawing. It shows a highly schematic:
Fig. 1
the unoccupied device for rounding the plate-shaped blank,
Fig. 2
inserting the flat blank in register into the rounding device.
Fig. 3
the rounding process,
Fig. 4
the register-based positioning of the panel edges of the blank to be connected,
Fig. 5
cutting the blank to size, removing the waste pieces,
Fig. 6
the overlap-free merging of the plate edges forming the beginning and end of the printing form and subsequent welding of the plate edges.

Der Zuschnitt 1 wird in Form einer Platte aus einem metallischen Werkstück, das in der Regel bandförmig vorliegt, in dem der Breite des bestimmten Formzylinders entsprechenden Maß und grob in der Länge mit größerem als das für den Umfang der Druckform vorgesehene Maß zugeschnitten. Die Plattenstanze versieht gleichzeitig den Zuschnitt 1 im Bereich der zu verbindenden Plattenkanten 5 a, 5 b außerhalb des vorgesehenen Druckbereichs mit einer Registereinrichtung in Form eines Paßloch-Systems. Es versteht sich, daß auch jedliche Art von Anschlägen, Markierungen oder sonstige Hilfsmittel, mit dem eine lagegerechte Fixierung bzw. Ausrichtung der Plattenkanten 5 a, 5 b in der Schweißvorrichtung gewährleistet ist, genauso geeignet wäre.The blank 1 is in the form of a plate made of a metallic Workpiece, which is usually in the form of a tape, in which the Width corresponding to the particular forme cylinder and rough in the length greater than that for the perimeter of the printing form Cut the intended size. The plate punch provides at the same time the blank 1 in the area to be joined Plate edges 5 a, 5 b with outside the intended printing area a register device in the form of a fitting hole system. It understands yourself that any kind of attacks, markings or other aids with which an appropriate fixation or Alignment of the plate edges 5 a, 5 b in the welding device is guaranteed, would be just as suitable.

Die Vorrichtung zum Runden des plattenförmigen Zuschnitts 1, die im vorliegenden Fall auch die Schweißvorrichtung ist, ist in bekannter Weise mit Festhalteleisten 2 a, 2 b in Form von Saugleisten mit im geringen Abstand über die gesamte Länge verteilten, integrierten an- und abstellbaren Vakuumsaugern 3 zum Festhalten des Zuschnitts 1 ausgebildet. Desweiteren sind die Saugleisten 2 a, 2 b mit Stiftregistern 4 a, 4 b zur registergerechten Zentrierung im Paßlochsystem des plattenförmigen Zuschnitts 1 ausgestattet.The device for rounding the plate-shaped blank 1, the in the present case also the welding device is in known manner with retaining strips 2 a, 2 b in the form of Squeegees with a small distance over the entire length distributed, integrated adjustable and removable vacuum cups 3 designed to hold the blank 1. Furthermore are the suction bars 2 a, 2 b with pin registers 4 a, 4 b correct centering in the fitting hole system of the plate-shaped Cut 1 equipped.

Fig. 2 zeigt das registerhaltige Einlegen des planen Zuschnittes 1 in die Vorrichtung zum Runden. Sitzen die Stifte 4 a, 4 b der Registereinrichtung im Paßlochsystem des Zuschnitts 1, wird dieser durch Anstellen der Vakuumsauger 3 registerhaltig in der Vorrichtung fixiert.2 shows the insertion of the flat blank 1 in register in the device for rounding. Sit the pins 4 a, 4 b Register device in the pass hole system of the blank 1, this is by placing the vacuum cups 3 in register in the Device fixed.

Die registerhaltige Fixierung kann auch bei plattenförmigen Zuschnitten ohne ein vorher eingestanztes Paßloch-System vorgenommen und in den weiteren erfindungsgemäßen Verfahrensschritten der Zuschnitt zu einer Hülse verschweißt werden, indem der Zuschnitt mit genügend überstand in die Schweißvorrichtung eingelegt wird, die beiden Festhalteleisten mit einem geringeren Abstand als die theoretisch richtige Länge der Druckform positioniert und danach zur Straffung der Platte auf die richtige Länge verfahren werden.The fixation in register can also be used for plate-shaped fixtures Cut without a pre-punched pass hole system and in the further method steps of the invention Blank to be welded to a sleeve by the blank is inserted into the welding device with sufficient protrusion, the two retaining strips with a smaller distance than that theoretically correct length of the printing form and then positioned be moved to the correct length to tighten the plate.

Da im Offsetdruck vorbehandelte Aluminiumplatten die am meisten verwendete Druckformart ist, werden beim Ausführungsbeispiel Vakuumsauger 3 benutzt. Besteht das Plattenmaterial aus einem magnetisierbaren Metall ist zum Fixieren des Zuschnittes in der Schweißvorrichtung auch eine magnetische Einrichtung denkbar. Prinzipiell kann für das registerhaltige Einlegen der Druckform jedoch auch eine mechanische Klemmeinrichtung verwendet werden.Because aluminum plates pretreated in offset printing are the most is used in the embodiment Vacuum suction cup 3 used. The plate material consists of a magnetizable metal is used to fix the blank in the Welding device a magnetic device is also conceivable. In principle, you can insert the printing form in register however, a mechanical clamping device can also be used.

Im nächsten Schritt (Fig. 3) wird der Zuschnitt 1 in bekannter Weise automatisch gerundet und die zu verbindenden Plattenkanten 5 a, 5 b des Zuschnitts 1 zum maßhaltigen Ablängen registergerecht positioniert (Fig. 4).In the next step (Fig. 3) the blank 1 is known Way rounded automatically and the board edges to be connected 5 a, 5 b of the cut 1 for true-to-length cutting to register positioned (Fig. 4).

Ein Laserstrahl 6 a, 6 b wird als Schneidgerät benutzt und zum beidseitigen maßhaltigen Ablängen des Zuschnitts 1 an beiden Plattenkanten 5 a, 5 b eingesetzt (Fig. 5). A laser beam 6 a, 6 b is used as a cutter and for true-to-size lengths of the blank 1 on both sides Plate edges 5 a, 5 b used (Fig. 5).

Das Laserschneiden von flachen Blechen, auch in komplizierten Konturen sowie scharfen Ecken, ist Stand der Technik. Entsprechend seinem Lichtcharakter gehorcht der Laserstrahl den Gesetzen der Optik. Er läßt sich also mit Spiegeln und Linsen führen und in seinem Querschnitt nahezu beliebig verändern. Der Vorteil des Lasers als Schneidgerät besteht vor allem in der sehr geringen thermischen Schädigung der Schnittflanken, der hohen Trenngeschwindigkeit mit gleichbleibender Qualität und der Möglichkeit zur Automatisierung des Prozeßes.Laser cutting of flat sheets, even in complicated ones Contours and sharp corners is state of the art. Corresponding the light beam obeys the laws of Optics. So it can be guided with mirrors and lenses and change in cross section almost arbitrarily. The advantage of the laser as a cutting device is mainly in the very low thermal damage to the cut edges, the high Cutting speed with constant quality and Possibility to automate the process.

Nach dem Schneidevorgang entstehen ein bzw. zwei Abfallstücke 7 a, 7 b die nun aus der Schweißvorrichtung entfernt werden. Da die Stifte 4 a, 4 b der Registereinrichtung im Paßlochsystem des Zuschnitts 1 zentriert sind und das Paßlochsystem sich auf den Abfallstücken 7 a, 7 b befindet, kann die Entfernung der Abfallstücke 7 a, 7 b einfach durch Wegschwenken der Stiftregister 4 a, 4 b vorgenommen werden (Fig. 5).After the cutting process, one or two pieces of waste are created 7 a, 7 b which are now removed from the welding device. There the pins 4 a, 4 b of the register device in the pass hole system of the blank 1 are centered and the fitting hole system on the waste pieces 7 a, 7 b, the removal of the Waste pieces 7 a, 7 b simply by swiveling the pin register away 4 a, 4 b are made (Fig. 5).

Fig. 6 zeigt das überlappungsfreie Zusammenführen der den Anfang und das Ende der maßhaltig abgelängten Druckform bildenden Plattenkanten 8 a, 8 b, die nun miteinander verschweißt werden.Fig. 6 shows the overlap-free merging of the beginning and the end of the plate edges that are cut to size 8 a, 8 b, which are now welded together.

Geschweißt wird wiederum mit einem fokusiertem Laserstrahl 9. So ist die Wärmeeinwirkung auf eine schmale Zone begrenzt, und der Laserstrahl kann tief in den Werkstoff eindringen. Wärmebelastung und Verzug des Schweißgutes sind im Vergleich mit anderen thermischen Verfahren äußerst gering.Welding is again carried out with a focused laser beam 9 the heat exposure is limited to a narrow zone, and the Laser beam can penetrate deep into the material. Heat load and warpage of the weld metal are compared to other thermal Procedure extremely low.

Noch einmal zusammengefaßt, werden also im Gegensatz zum Stand der Technik gestanzte, nicht aber maßhaltig abgelängte Werkstücke in die Schweißvorrichtung registerhaltig eingelegt und erst im eingespannten Zustand vom Laser auf das vorgegebene Maß zugeschnitten. Summarized again, they are in contrast punched to the state of the art, but not cut to size Workpieces placed in register in the welding device and only in the clamped state from the laser to the specified one Tailored to measure.

Durch den maßhaltigen Laser-Zuschnitt in der Schweißvorrichtung kann auf eine externe Blechschere ganz verzichtet werden. Die zur registerhaltigen Aufnahme des Plattenzuschnitts 1 in der Schweißvorrichtung notwendigen Registerstanzungen im Blech werden nach dem Fixieren durch die Festhalteleisten 2 a, 2 b überflüßig und können nach dem längenmaßhaltigen Laserzuschnitt zusammen mit den Abfallstücken 7 a, 7 b entfernt werden. Dadurch entsteht eine geschlossene Hülsenoberfläche, auf der sich keine Druckmedien in störender Weise in den Ausstanzungen ansammeln können.The dimensionally accurate laser cutting in the welding device can there is no need for an external shear. The for register recording of the plate blank 1 in the Welding device necessary register punchings in the sheet after fixing by the retaining strips 2 a, 2 b superfluous and can be cut to length after laser cutting can be removed together with the waste pieces 7 a, 7 b. This creates a closed sleeve surface, on which no print media is interfering in the Punching out punches.

Ein weiterer besonderer Vorteil ist darin zu sehen, daß die lasergeschnittenen Plattenkanten 8 a, 8 b, bedingt durch die Verfahrensverwandtschaft von Laser-Schneiden und Laser-Schweißen optimal aufeinander abgestimmt werden können, so daß auch eine optimale Schweißnahtqualität entsteht.Another particular advantage is the fact that the laser-cut plate edges 8 a, 8 b, due to the Process relatedness of laser cutting and laser welding can be optimally coordinated, so that even a optimal weld quality is created.

Zum Aufbringen der Druckformhülse auf den Formzylinder kann auf bekannte Einrichtungen, wie z. B. Markierungen auf der Formzylinderoberfläche, die mit Markierungen auf der dünnen Druckformhülse in Übereinstimmung gebracht werden, zurückgegriffen werden. Die Hülse wird unter Aufweiten mittels Druckluft auf den Formzylinder aufgeschoben. Die Wegnahme der Druckluft bewirkt eine formschlüßige Anhaftung der Druckform auf dem Formzylinder. Das Beschichten und Belichten der Druckform kann einerseits vor dem Verschweißen des plattenförmigen Zuschnitts außerhalb der Druckmaschine auf fotochemischen Wege, andererseits nach dem Aufschieben der Druckformhülse, indem die Druckform auf dem Formzylinder rundum beschichtet und belichtet wird, vorgenommen werden.To apply the printing form sleeve to the forme cylinder can known facilities such. B. marks on the Forme cylinder surface with markings on the thin Printing form sleeve to be brought into line become. The sleeve is expanded by means of compressed air on the Form cylinder pushed on. The removal of the compressed air causes a positive adhesion of the printing form on the form cylinder. The Coating and exposure of the printing form can on the one hand before Welding the plate-shaped blank outside the printing press by photochemical means, on the other hand after postponing the Printing form sleeve by placing the printing form on the form cylinder all around is coated and exposed.

Claims (4)

  1. Process for the production of a sleeve-shaped printing forme, in particular for offset printing, of a metallic material for a forme cylinder of a printing machine, proceeding from a plate-shaped blank which is clamped true-to-register into a welding device, where the opposite plate edges forming the beginning and end of the printing forme are welded by means of a laser beam, so that a printing forme sleeve with a continuous circumferential surface is produced,
    characterised in that
    the plate-shaped blank (1) having a width corresponding to the forme cylinder is cut roughly to length with a dimension greater than that specified for a printing forme by stamping from a metallic workpiece, in that the blank (1) is inserted into the welding device, without overlapping, in the true-to-register, rounded state, as a work piece that is stamped but not cut to the correct length, is cut to the correct length in the welding device by means of the laser beam acting as a cutting device (6a, 6b) so that at least one piece of waste (7a, 7b) is produced, in that the piece of waste (7a, 7b) is removed, the two plate edges (8a, 8b) forming the beginning and the end of the printing forme are set opposite each other without overlapping and are welded together.
  2. Process for the production of a sleeve-shaped printing forme according to claim 1, characterised in that the blank (1) in the true-to-register, rounded state is cut to the correct length at both opposite plate edges (5a, 5b) by means of the laser beam (6a, 6b) so that two pieces of waste (7a, 7b) are produced which are both removed.
  3. Process for the production of a sleeve-shaped printing forme according to one of the preceding claims, characterised in that the plate-shaped blank (1) is, together with a register device in the form of a fitting hole system in the region of the plate edges (5a, 5b) forming the beginning and end of the blank (1), produced by stamping outside the printing area.
  4. Process for the production of a sleeve-shaped printing forme according to claim 3, characterised in that the register device is introduced into the region of the blank (1) that is removed after the laser cutting as a waste piece (7a, 7b).
EP94117571A 1993-11-11 1994-11-08 Method of manufacturing a tubular printing plate Expired - Lifetime EP0653313B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4338467 1993-11-11
DE4338467A DE4338467C1 (en) 1993-11-11 1993-11-11 Method for producing a sleeve-shaped printing forme

Publications (2)

Publication Number Publication Date
EP0653313A1 EP0653313A1 (en) 1995-05-17
EP0653313B1 true EP0653313B1 (en) 1999-01-27

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EP94117571A Expired - Lifetime EP0653313B1 (en) 1993-11-11 1994-11-08 Method of manufacturing a tubular printing plate

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US (1) US5499580A (en)
EP (1) EP0653313B1 (en)
JP (1) JP2738509B2 (en)
CA (1) CA2135213C (en)
DE (2) DE4338467C1 (en)

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DE10049283A1 (en) * 2000-10-05 2002-04-11 Hueck Folien Gmbh & Co Kg Method and device for producing a cylindrical embossing mold
DE10116609A1 (en) 2001-04-03 2002-11-07 Roland Man Druckmasch Device for producing a sleeve-shaped printing form
DE10250706B3 (en) * 2002-10-31 2004-05-27 Koenig & Bauer Ag Clamping system for edge of printing plate on cylinder of printing machine has sharp edge engaging edge of plate bent through acute angle and spring-loaded lever holding edge bent at right-angle
DE10250683B3 (en) * 2002-10-31 2004-03-18 Koenig & Bauer Ag Manufacturing rotation body for printing machine involves fitting outer body with flow channel incision for heat-carrying medium to base body, fitting cover that covers flow channel to outer body
DE10262010B4 (en) * 2002-10-31 2007-03-29 Koenig & Bauer Ag Method for producing a rotary body of a printing machine
DE10260445A1 (en) * 2002-12-21 2004-07-08 Man Roland Druckmaschinen Ag Device for producing a sleeve-shaped printing form
DE102004041024B4 (en) * 2004-08-25 2006-07-06 Thyssenkrupp Steel Ag Method and device for producing a longitudinally welded hollow profile
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US8872063B2 (en) * 2008-06-12 2014-10-28 Asahi Kasei E-Materials Corporation Method for producing blank printing sleeve for laser engraving
DE102011051160A1 (en) * 2011-06-17 2012-12-20 Thyssenkrupp Steel Europe Ag Method for producing slotted hollow profiles
AU2013341803B2 (en) 2012-11-06 2017-05-04 Rolling Optics Innovation Ab Printing tool for production of synthetic image devices and a method of manufacturing such a tool
WO2015161278A1 (en) * 2014-04-17 2015-10-22 Universal Engraving, Inc. Graphic arts sleeve and support mandrel

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Also Published As

Publication number Publication date
CA2135213A1 (en) 1995-05-12
US5499580A (en) 1996-03-19
DE59407731D1 (en) 1999-03-11
JPH07186358A (en) 1995-07-25
EP0653313A1 (en) 1995-05-17
JP2738509B2 (en) 1998-04-08
DE4338467C1 (en) 1995-02-23
CA2135213C (en) 1998-11-24

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