EP0653313A1 - Method of manufacturing a tubular printing plate - Google Patents

Method of manufacturing a tubular printing plate Download PDF

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Publication number
EP0653313A1
EP0653313A1 EP94117571A EP94117571A EP0653313A1 EP 0653313 A1 EP0653313 A1 EP 0653313A1 EP 94117571 A EP94117571 A EP 94117571A EP 94117571 A EP94117571 A EP 94117571A EP 0653313 A1 EP0653313 A1 EP 0653313A1
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EP
European Patent Office
Prior art keywords
blank
printing form
plate
register
printing
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
EP94117571A
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German (de)
French (fr)
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EP0653313B1 (en
Inventor
Eduard Dr. Hoffmann
Johann Winterholler
Wolfgang Prem
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Manroland AG
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MAN Roland Druckmaschinen AG
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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, in particular for offset printing from a metallic material for a forme cylinder of a 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 the plate edges forming the printing form are welded by means of a laser beam, so that a printing form sleeve with a coherent peripheral surface is formed.
  • the object underlying the present invention is to be seen in improving the generic method in such a way that the sheet metal shears can be dispensed with and a cost saving can be achieved while still ensuring that the plate-shaped blank is cut to length exactly.
  • the blank 1 is cut in the form of a plate from a metallic workpiece, which is generally in the form of a ribbon, in the measure corresponding to the width of the particular forme cylinder and roughly in length with a larger dimension than that provided for the circumference of the printing form.
  • the plate punch simultaneously provides the blank 1 in the area of the plate edges 5 a, 5 b to be connected outside the intended printing area with a register device in the form of a fitting hole system. It goes without saying that any kind of stops, markings or other aids, with which a positionally correct fixing or alignment of the plate edges 5 a, 5 b in the welding device is ensured, would also be suitable.
  • the device for rounding the plate-shaped blank 1 which in the present case is also the welding device, is in a known manner with retaining bars 2 a, 2 b in the form of suction bars with integrated vacuum suction cups 3 which are distributed over the entire length and are a short distance apart designed to hold the blank 1. Furthermore are the suction strips 2 a, 2 b are equipped with pin registers 4 a, 4 b for correct centering in the fitting hole system of the plate-shaped blank 1.
  • Fig. 2 shows the registration of the flat blank 1 in the rounding device. If the pins 4 a, 4 b of the register device are seated in the fitting hole system of the blank 1, this is fixed in place in the device by turning on the vacuum cups 3.
  • the fixation in register can also be carried out in the case of plate-shaped blanks without a previously punched-in fitting hole system and the blank can be welded into a sleeve in the further method steps according to the invention by inserting the blank into the welding device with sufficient protrusion, the two retaining strips with a smaller distance than position the theoretically correct length of the printing form and then move it to the correct length to tighten the plate.
  • vacuum suction devices 3 are used in the exemplary embodiment. If the plate material consists of a magnetizable metal, a magnetic device is also conceivable for fixing the blank in the welding device. In principle, however, a mechanical clamping device can also be used for inserting the printing form in register.
  • the blank 1 is automatically rounded in a known manner and the plate edges 5 a, 5 b of the blank 1 to be connected are positioned in register for dimensionally accurate cutting (FIG. 4).
  • a laser beam 6 a, 6 b is used as a cutting device and is used to cut the blank 1 to size on both sides at both edges 5 a, 5 b (FIG. 5).
  • Laser cutting of flat sheets, even in complicated contours and sharp corners, is state of the art. According to its light character, the laser beam obeys the laws of optics. It can therefore be guided with mirrors and lenses and its cross-section can be changed almost at will.
  • the advantage of the laser as a cutting device is above all the very low thermal damage to the cutting edges, the high cutting speed with constant quality and the possibility of automating the process.
  • FIG. 6 shows the overlap-free merging of the plate edges 8 a, 8 b forming the beginning and the end of the dimensionally cut printing form, which are now welded together.
  • Welding is again carried out with a focused laser beam 9.
  • the heat effect is limited to a narrow zone and the laser beam can penetrate deep into the material. Thermal stress and warpage of the weld metal are extremely low compared to other thermal processes.
  • punched but not dimensionally cut workpieces are inserted into the welding device in register and only cut to the specified size by the laser in the clamped state.
  • the register punchings in the sheet necessary for registering the plate blank 1 in the welding device become superfluous after being fixed by the retaining strips 2 a, 2 b and can be removed together with the waste pieces 7 a, 7 b after the lengthwise laser cutting. This creates a closed sleeve surface on which no print media can accumulate in the cutouts in a disruptive manner.
  • To apply the printing forme sleeve to the forme cylinder can known devices such.
  • the sleeve is pushed onto the forme cylinder by means of compressed air.
  • the removal of the compressed air causes the printing form to adhere positively to the form cylinder.
  • the coating and exposure of the printing form can be carried out on the one hand before welding the plate-shaped blank outside the printing machine by photochemical means, and on the other hand after the printing form sleeve has been pushed on, by coating and exposing the printing form on the form cylinder all around.

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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)

Abstract

Zur Herstellung einer hülsenförmigen Druckform aus einem metallischen Werkstoff für einen Formzylinder einer Druckmaschine wird ein plattenförmiger, mit einer Registereinrichtung versehener Zuschnitt 1 mit einem dem Formzylinder entsprechender Breite und einem in der Länge grobem mit größerem als das für eine Druckform vorgegebene Maß zugeschnitten und gleichzeitig im Bereich der zu verschweißenden Plattenkanten außerhalb des Druckbereichs mit der Registereinrichtung versehen. Der Zuschnitt 1 wird im registergerechten gerundeten Zustand in der Schweißvorrichtung mittels des Laserstrahls 6 a, 6 b als Schneidgerät maßhaltig abgelängt, so daß zwei Abfallstücke 7 a, 7 b entstehen. Die Abfallstücke 7 a, 7 b werden entfernt, die den Anfang und das Ende der Druckform bildenden Plattenkanten 8 a, 8 b überlappungsfrei einander gegenübergestellt und miteinander laserverschweißt. <IMAGE>To produce a sleeve-shaped printing form from a metallic material for a forme cylinder of a printing press, a plate-shaped blank 1 provided with a register device is cut with a width corresponding to the forme cylinder and a lengthier one with a larger dimension than that specified for a printing form and at the same time in the area of the plate edges to be welded outside the printing area with the register device. The blank 1 is cut to size in the register-appropriate rounded state in the welding device by means of the laser beam 6 a, 6 b as a cutting device, so that two pieces of waste 7 a, 7 b are produced. The waste pieces 7 a, 7 b are removed, the plate edges 8 a, 8 b forming the beginning and the end of the printing form are juxtaposed without overlap and laser-welded to one another. <IMAGE>

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, in particular for offset printing from a metallic material for a forme cylinder of a 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 the plate edges forming the printing form are welded by means of a laser beam, so that a printing form sleeve with a coherent peripheral surface is formed.

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.An offset printing form sleeve produced by a generic method is already disclosed in the earlier German patent application P41 40 768. This sleeve is in connection with a channel and clamping segmentless forme cylinder, the z. B. is already known from German patent DE-PS 27 00 118, can be used. For this purpose, a plate is cut both to the extent corresponding to the size and to the width of the forme cylinder and provided with a register device in the form of a fitting hole system by means of a plate punch. The dimensionally accurate cut, which must be cut to length, is carried out using special metal shears and is then clamped in register in the form of a sleeve in a welding device. Now the plate edges forming the beginning and the end of the printing form can be longitudinally welded to one another using a preferably neodymium-YAG laser.

Mit der älteren deutschen Patentanmeldung P 43 11 078 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 the older German patent application P 43 11 078 there is also a device that only requires inserting the cut plate and, after inserting the plate, enables the plate to be rounded to form the sleeve and the precise registration of the plate edges forming the beginning and end of the printing form for laser welding , announced.

Die zum maßhaltigen Ablängen, das sehr genau vorgenommen werden muß, des plattenförmigen Zuschnittes verwendete Blechschere ist teuer.The sheet metal scissors used for accurate cutting to length, which must be carried out very precisely, of the plate-shaped blank are expensive.

Deshalb ist die der vorliegenden Erfindung zugrunde liegende Aufgabe 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.Therefore, the object underlying the present invention is to be seen in improving the generic method in such a way that the sheet metal shears can be dispensed with and a cost saving can be achieved while still ensuring that the plate-shaped blank is cut to length exactly.

Diese Aufgabe wird durch die Verfahrensschritte im kennzeichnenden Teil des Patentanspruchs 1 gelöst.This object is achieved by the method steps in the characterizing part of patent claim 1.

Vorteilhafte Ausgestaltungen der Erfindung sind den Unteransprüchen zu entnehmen.Advantageous embodiments of the invention can be found in the subclaims.

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 cut in the form of a plate from a metallic workpiece, which is generally in the form of a ribbon, in the measure corresponding to the width of the particular forme cylinder and roughly in length with a larger dimension than that provided for the circumference of the printing form. The plate punch simultaneously provides the blank 1 in the area of the plate edges 5 a, 5 b to be connected outside the intended printing area with a register device in the form of a fitting hole system. It goes without saying that any kind of stops, markings or other aids, with which a positionally correct fixing or alignment of the plate edges 5 a, 5 b in the welding device is ensured, would also be 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, which in the present case is also the welding device, is in a known manner with retaining bars 2 a, 2 b in the form of suction bars with integrated vacuum suction cups 3 which are distributed over the entire length and are a short distance apart designed to hold the blank 1. Furthermore are the suction strips 2 a, 2 b are equipped with pin registers 4 a, 4 b for correct centering in the fitting hole system of the plate-shaped blank 1.

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.Fig. 2 shows the registration of the flat blank 1 in the rounding device. If the pins 4 a, 4 b of the register device are seated in the fitting hole system of the blank 1, this is fixed in place in the device by turning on the vacuum cups 3.

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 carried out in the case of plate-shaped blanks without a previously punched-in fitting hole system and the blank can be welded into a sleeve in the further method steps according to the invention by inserting the blank into the welding device with sufficient protrusion, the two retaining strips with a smaller distance than position the theoretically correct length of the printing form and then move it 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.Since aluminum plates pretreated in offset printing are the most commonly used type of printing form, vacuum suction devices 3 are used in the exemplary embodiment. If the plate material consists of a magnetizable metal, a magnetic device is also conceivable for fixing the blank in the welding device. In principle, however, a mechanical clamping device can also be used for inserting the printing form in register.

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 automatically rounded in a known manner and the plate edges 5 a, 5 b of the blank 1 to be connected are positioned in register for dimensionally accurate cutting (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 cutting device and is used to cut the blank 1 to size on both sides at both edges 5 a, 5 b (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 contours and sharp corners, is state of the art. According to its light character, the laser beam obeys the laws of optics. It can therefore be guided with mirrors and lenses and its cross-section can be changed almost at will. The advantage of the laser as a cutting device is above all the very low thermal damage to the cutting edges, the high cutting speed with constant quality and the possibility of automating 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 7 a, 7 b arise which are now removed from the welding device. Since the pins 4 a, 4 b of the register device are centered in the pass hole system of the blank 1 and the pass hole system is on the waste pieces 7 a, 7 b, the removal of the waste pieces 7 a, 7 b can be done simply by pivoting away the pin register 4 a, 4 b be 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.6 shows the overlap-free merging of the plate edges 8 a, 8 b forming the beginning and the end of the dimensionally cut printing form, 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 effect is limited to a narrow zone and the laser beam can penetrate deep into the material. Thermal stress and warpage of the weld metal are extremely low compared to other thermal processes.

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.In summary, in contrast to the prior art, punched but not dimensionally cut workpieces are inserted into the welding device in register and only cut to the specified size by the laser in the clamped state.

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.Thanks to the dimensionally accurate laser cutting in the welding device, there is no need for external shears. The register punchings in the sheet necessary for registering the plate blank 1 in the welding device become superfluous after being fixed by the retaining strips 2 a, 2 b and can be removed together with the waste pieces 7 a, 7 b after the lengthwise laser cutting. This creates a closed sleeve surface on which no print media can accumulate in the cutouts in a disruptive manner.

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 can be seen in the fact that the laser-cut plate edges 8 a, 8 b can be optimally coordinated with one another due to the process relatedness of laser cutting and laser welding, so that an optimal weld seam quality also results.

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 forme sleeve to the forme cylinder can known devices such. B. markings on the forme cylinder surface, which are brought into line with markings on the thin printing form sleeve. The sleeve is pushed onto the forme cylinder by means of compressed air. The removal of the compressed air causes the printing form to adhere positively to the form cylinder. The coating and exposure of the printing form can be carried out on the one hand before welding the plate-shaped blank outside the printing machine by photochemical means, and on the other hand after the printing form sleeve has been pushed on, by coating and exposing the printing form on the form cylinder all around.

Claims (4)

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, dadurch gekennzeichnet, daß der eine dem Formzylinder entsprechende Breite aufweisende plattenförmige Zuschnitt (1) in der Länge grob mit größerem als das für eine Druckform vorgegebene Maß abgelängt wird, daß der Zuschnitt (1) im registergerechten, gerundeten Zustand in der Schweißvorrichtung mittels des Laserstrahls als Schneidgerät (6 a, 6 b) maßhaltig abgelängt wird, so daß mindestens ein Abfallstück (7 a, 7 b) entsteht, daß das Abfallstück (7 a, 7 b) entfernt wird, die beiden, den Anfang und Ende der Druckform bildende Plattenkanten (8 a, 8 b) überlappungsfrei einander gegenübergestellt und miteinander verschweißt werden.Process for producing a sleeve-shaped printing form, in particular for offset printing from a metallic material for a form cylinder of a printing machine, starting from a plate-shaped blank which is clamped in register in a welding device and there by means of the opposite plate edges forming the beginning and end of the printing form a laser beam are welded, so that a printing form sleeve with a continuous circumferential surface is formed, characterized in that the plate-shaped blank (1) having a width corresponding to the forme cylinder is roughly cut to length with a greater dimension than that specified for a printing form such that the Cutting (1) in the register-correct, rounded state in the welding device by means of the laser beam as a cutting device (6 a, 6 b) is cut to length, so that at least one piece of waste (7 a, 7 b) arises that the piece of waste (7 a, 7 b) is removed, the two plate edges (8 a, 8 b) forming the beginning and end of the printing form are juxtaposed without overlap and welded together. Verfahren zur Herstellung einer hülsenförmigen Druckform nach Anspruch 1, dadurch gekennzeichnet, daß der Zuschnitt (1) im registergerechten, gerundeten Zustand an beiden sich gegenüberstehenden Plattenkanten (5 a, 5 b) mittels des Laserstrahls (6 a, 6 b) maßhaltig abgelängt wird, so daß zwei Abfallstücke (7 a, 7 b) entstehen, die beide entfernt werden.Method for producing a sleeve-shaped printing form according to claim 1, characterized in that the blank (1) is cut to length in the register-correct, rounded state on both opposing plate edges (5 a, 5 b) by means of the laser beam (6 a, 6 b), so that two pieces of waste (7 a, 7 b) arise, both of which are removed. Verfahren zur Herstellung einer hülsenförmigen Druckform nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der plattenförmige Zuschnitt (1) mitsamt einer Registereinrichtung in Form eines Paßloch-Systems im Bereich der Anfang und Ende des Zuschnitts (1) bildenden Plattenkanten (5a, 5b) außerhalb des Druckbereichs durch Stanzung hergestellt wird.Method for producing a sleeve-shaped printing form according to one of the preceding claims, characterized in that the plate-shaped blank (1) together with a register device in the form of a fitting hole system in the area of the plate edges (5a, 5b) forming the beginning and end of the blank (1) outside of the printing area is produced by punching. Verfahren zur Herstellung einer hülsenförmigen Druckform nach Anspruch 3, dadurch gekennzeichnet das die Registereinrichtung in den Bereich des Zuschnitts (1) eingebracht wird, der nach dem Laser-Schneiden als Abfallstück (7 a, 7 b) entfernt wird.A method for producing a sleeve-shaped printing form according to claim 3, characterized in that the register device is introduced into the region of the blank (1) which is removed as a waste piece (7 a, 7 b) after laser cutting.
EP94117571A 1993-11-11 1994-11-08 Method of manufacturing a tubular printing plate Expired - Lifetime EP0653313B1 (en)

Applications Claiming Priority (2)

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DE4338467 1993-11-11
DE4338467A DE4338467C1 (en) 1993-11-11 1993-11-11 Method for producing a sleeve-shaped printing forme

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EP0653313B1 EP0653313B1 (en) 1999-01-27

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

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19710901C1 (en) * 1997-03-15 1998-08-13 Roland Man Druckmasch Appliance for producing sleeve-type printing form from original sheet
US6322652B1 (en) * 1998-09-04 2001-11-27 3M Innovative Properties Company Method of making a patterned surface articles
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
FI20045462A (en) * 2004-11-29 2006-05-30 Avantone Oy Embosseringsorgan
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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2547873A1 (en) * 1975-10-25 1977-04-28 Kyuroku Kk Endless print belt for high speed printer - comprises thin heat treatable steel sheet with photoetched symbols on its surface
DE2949095B1 (en) * 1979-12-06 1981-03-26 Maschinenfabrik Weingarten AG, 88250 Weingarten Device for connecting two material tapes
EP0326994A1 (en) * 1988-02-03 1989-08-09 Thyssen Industrie Ag Method and devices for butt welding thin plates together, especially those made of steel, by means of a powerful laser beam
DE3828341A1 (en) * 1988-08-20 1989-10-05 Daimler Benz Ag Method of butt welding thin-gauge sheet-metal parts by the fusion welding process
DE4140768A1 (en) * 1991-12-11 1993-06-17 Roland Man Druckmasch OFFSET PRINTING FORM

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN146438B (en) * 1976-01-08 1979-06-02 Strachan & Henshaw Ltd
US4139145A (en) * 1977-09-21 1979-02-13 Computer Peripherals, Inc. Band welding fixture
JPS6096385A (en) * 1983-10-27 1985-05-29 Mitsubishi Electric Corp Joining method of metallic plate
JPS60121089A (en) * 1983-12-02 1985-06-28 Mitsubishi Electric Corp Butt joining method of steel plates by laser beam
JPS61255782A (en) * 1985-05-08 1986-11-13 Kawasaki Steel Corp Butt welding method in laser welding of steel strip
JPS61276794A (en) * 1985-05-31 1986-12-06 Kawasaki Steel Corp Laser butt welding method for metallic strip
DE4100302C1 (en) * 1991-01-08 1992-02-06 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh, 4100 Duisburg, De
JPH04327388A (en) * 1991-04-26 1992-11-16 Nippon Steel Corp Cutting and welding method and equipment by laser beam for sheet metals
US5312025A (en) * 1992-07-20 1994-05-17 Rolf Rottger Method of and device for manufacturing bands of steel

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2547873A1 (en) * 1975-10-25 1977-04-28 Kyuroku Kk Endless print belt for high speed printer - comprises thin heat treatable steel sheet with photoetched symbols on its surface
DE2949095B1 (en) * 1979-12-06 1981-03-26 Maschinenfabrik Weingarten AG, 88250 Weingarten Device for connecting two material tapes
EP0326994A1 (en) * 1988-02-03 1989-08-09 Thyssen Industrie Ag Method and devices for butt welding thin plates together, especially those made of steel, by means of a powerful laser beam
DE3828341A1 (en) * 1988-08-20 1989-10-05 Daimler Benz Ag Method of butt welding thin-gauge sheet-metal parts by the fusion welding process
DE4140768A1 (en) * 1991-12-11 1993-06-17 Roland Man Druckmasch OFFSET PRINTING FORM
EP0554542A1 (en) * 1991-12-11 1993-08-11 MAN Roland Druckmaschinen AG Offset printing element

Also Published As

Publication number Publication date
CA2135213A1 (en) 1995-05-12
EP0653313B1 (en) 1999-01-27
US5499580A (en) 1996-03-19
DE59407731D1 (en) 1999-03-11
JPH07186358A (en) 1995-07-25
JP2738509B2 (en) 1998-04-08
DE4338467C1 (en) 1995-02-23
CA2135213C (en) 1998-11-24

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