EP1581391B1 - Printing machine and method for printing a print web - Google Patents

Printing machine and method for printing a print web Download PDF

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Publication number
EP1581391B1
EP1581391B1 EP03799442A EP03799442A EP1581391B1 EP 1581391 B1 EP1581391 B1 EP 1581391B1 EP 03799442 A EP03799442 A EP 03799442A EP 03799442 A EP03799442 A EP 03799442A EP 1581391 B1 EP1581391 B1 EP 1581391B1
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EP
European Patent Office
Prior art keywords
printing
belt
print web
supporting
units
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Expired - Lifetime
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EP03799442A
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German (de)
French (fr)
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EP1581391A1 (en
Inventor
Klaus Thimm
Wolfgang Becker
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Rosenberg & Co GmbH
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Rosenberg & Co GmbH
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Publication of EP1581391A1 publication Critical patent/EP1581391A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/02—Conveying or guiding webs through presses or machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F5/00—Rotary letterpress machines
    • B41F5/24—Rotary letterpress machines for flexographic printing

Definitions

  • the invention relates to a method for printing a printing web by means of a plurality of printing units, each having a circulating, printing plates carrying and guided around a plate cylinders printing tape.
  • the invention further relates to a printing machine having a plurality of printing units, each having a circulating, printing plates carrying and a plate cylinder guided pressure belt and an inking device, and having a roller having print path guide with pressure means for pressing the printing web to the printing tape with the printing plates.
  • the printing of printing webs is carried out regularly in that the paper web is looped into different printing units, wherein during the transition from one printing unit to another regularly takes place a deflection of for example 180 °.
  • flexo printing machines For printing smaller runs, as they are often required for printed packaging, flexo printing machines have proven, as they are known for example from DE 44 10 132 C2.
  • the printing plate is located here as a flexible material on a circulating printing belt, which is guided over a Druckzlinder, where in co-operation with a counter-pressure cylinder, the printing line passing between the two cylinders is printed.
  • the known printing methods are proven and can be used without problems in printing webs which have sufficient tensile stability in order to absorb the tensile forces exerted during the passage of the printing web through the cylinder gaps of driven cylinders onto the pressure web running freely between deflection cylinders.
  • GB-A-2188003 A similar arrangement with the basically same disadvantages with respect to the printing results is known from GB-A-2188003.
  • a central arrangement of a support band is provided, which is endlessly guided on a curved track circumferentially with support rollers.
  • the printing units are formed with cliché cylinders, which must be replaced when changing the printing length.
  • the printing units are located radially outside of arranged between the support rollers counter-pressure cylinders.
  • the invention is based on the problem to enable a printing of a printing web with a low intrinsic stability by multiple printing units with a simple design and flexible to be changed printing press.
  • a method of the type mentioned above is characterized in that the printing web is guided in the area of the printing units on a transported at the same speed, guided substantially rectilinear support belt and that the multiple printing arranged side by side in the transport direction of the support belt Printing works done.
  • the method according to the invention allows the use in particular of ribbon printing units, which bring considerable advantages due to their flexible usability.
  • the printing of printing webs with a low intrinsic stability and / or greater elasticity succeeds in that the printing web in the region of Printing units is transported together with a support belt to which the printing web has no relative speed, so that the printing web is supported over the transport path through the printing units at all times flat.
  • the guide of the printing web is ideally straight.
  • a substantially rectilinear guidance within the meaning of this application is still present even if smaller deflections below 45 °, preferably below 20 °, occur. Minor deflections within said limits are harmless to the present invention.
  • the printing takes place in the transport direction at equal intervals, ie equidistant.
  • the present invention is preferably used in a roll-to-roll printing. However, it is also possible to divide the printing web immediately after printing in suitable track sections.
  • the inventive method allows an advantageous arrangement of the printing units parallel to each other, preferably in parallel stands of a printing press.
  • the printing units for maintenance or for a pressure change in a simple manner accessible. Any readjustments of the flexographic printing unit can be carried out in a simple manner without difficulty. If the printing web is rectilinear, preferably above the plate cylinder, the accessibility to the printing units is not hindered by the course of the printing web.
  • a printing machine of the type mentioned above is further characterized in that the printing web guide is formed by the printing units through a support belt moved at the speed of the printing web and that the printing units are formed on machine stands aligned along the support belt, wherein the Support band runs essentially straight.
  • the printing units are preferably mounted on parallel machine stands, arranged the plate cylinder of the printing units in the printing state at the same height and provided a substantially horizontal course of the support belt above the plate cylinder.
  • the support belt can rotate over support rollers, wherein the support rollers for supporting the printing web are preferably arranged close to tight.
  • Other support means may also be used, such as sliding plates.
  • a counter-pressure cylinder is arranged opposite each of the plate cylinders, which is preferably aligned tangentially with the support rollers, so that a straight course of the support belt can be maintained in the area of the impression cylinder.
  • the printing web runs on the side facing away from the impression cylinder side of the support band.
  • the printing units can be set up to receive print belts of different lengths, that is to say be flexographic printing units in particular.
  • the support belt is expediently driven slip-free and is preferably designed to form a positive connection with a drive element.
  • a printing web 1 runs from a supply roll 2 into a printing zone 3 and is wound onto a take-up reel 4 in the printed state.
  • the printing zone 3 there are four printing units 5, which are attached as tape printing units on vertical uprights 6.
  • Each printing unit 5 thus has an over a plate cylinder 7 and a tension roller 8 endlessly circulating pressure belt 9, on which the printing plate forming flexible plates are attached.
  • the plate cylinder 7 are all in the print state at the same height, so that the printing web 1 runs horizontally over the respective horizontal tangent of the plate cylinder 7.
  • the printing web 1 passes through the printing units 5 together with a support belt 10.
  • the support belt 10 runs endlessly between two deflection rollers 11 with a horizontally extending lower run 12.
  • On the horizontally extending Untertrum 12 is the printing web, which is moved at the same web speed as the support belt 10.
  • From the printing web 1 opposite side of Untertrums 12 presses in the plate cylinder 7 each a fixedly arranged impression cylinder 13 against the Untertrum 12 and the Printing web 1.
  • the printing web 1 is printed.
  • Figure 1 is illustrated by a schematically drawn operator 14 that the gap between the printing units 5 is easily accessible, so that the printing units 5 are easily accessible for maintenance and furnishing purposes and without difficulty.
  • the support belt 10 is supported in the region of its lower run 12 on the opposite side of the printing web 1 by in the transport direction close to lying close support rollers 12 'and held in contact with the printing web 1.
  • the contact with the printing web 1 is intensified by the fact that the printing web 1 is guided before entering the printing zone 3 and after exiting the printing zone 3 via deflection rollers 16, through which the printing web against the horizontal course through the print zone 3 through slightly the distance between deflection roller 16 and the associated deflection roller 11 of the rotating pressure belt 10 is deflected upward at an angle ⁇ 10 °.
  • Figure 2 illustrates in a schematic representation of the structure of a printing unit 5.
  • the lower tension roller 8 is movable on the vertical stand 6 in the vertical direction to tension the rotating pressure belt 9.
  • the printing process takes place in the gap between the plate cylinder 7 and impression cylinder 13, through which the pressure belt 9, but also the arrangement of printing web 1 and Untertrum 12 of the support belt 10 pass.
  • Prior to the entry of the printing tape 9 in said gap between the plate cylinder 7 and counter-pressure cylinder 13 is applied to the outside of the printing tape 9 and a cliché applied thereto by an inking roller 17 color in the desired amount.
  • an anilox roller inking roller 17 is deliverable with a linear guide 18 against the circumference of the plate cylinder 7 by means of a servo motor 19.
  • the delivery of Ink application roller 17 via a driven by a belt drive 20 and within a bellows 21 guided (not shown) spindle.
  • the rotary drive of the inking roller 17 via a (not shown) speed-controlled servo motor.
  • the plate cylinder 7 can be pressed by means of a linear guide 22 and a servo motor 23 and a spindle 24 against the stationary counter-pressure roller 13.
  • the rotational movement of the plate cylinder 7 is effected by a speed-controlled servomotor 25.
  • the printing unit shown is suitable in connection with the arrangement shown in Figure 1 in particular for printing large Druckrapporte.
  • The, pressure repeat can be changed by replacing the pressure belt 9 against a pressure belt 9 of a different length quickly and easily.
  • the vertically adjustable tension roller 8 on the one hand, a replacement readily possible and on the other hand, the required voltage can be quickly adjusted again.
  • the printing machine according to the invention is therefore characterized by a high degree of flexibility in that a short-term conversion of the printing press to another print repeat is possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Printing Methods (AREA)
  • Coloring (AREA)
  • Advancing Webs (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Screen Printers (AREA)

Abstract

In order to print a print web ( 1 ) by means of a plurality of printing groups ( 5 ), the print web ( 1 ) is guided in the region of the printing groups ( 5 ) on a support band ( 10 ) which is transported at the same speed and multiple printing is carried out by printing groups ( 5 ) arranged next to each other in the direction of transport of the support band ( 10 ). Preferably, the printing groups ( 5 ) are arranged on vertical machine stands ( 6 ), which are disposed near to each other and parallel to each other, and terminate with plate cylinders ( 7 ) at the same level, thereby enabling the print web ( 1 ) to run through a print zone ( 3 ) in a substantially horizontal manner.

Description

Die Erfindung betrifft ein Verfahren zum Bedrucken einer Druckbahn mittels einer Mehrzahl von Druckwerken, die jeweils ein umlaufendes, Druckklischees tragendes und um einen Plattenzylindern geführtes Druckband aufweisen.The invention relates to a method for printing a printing web by means of a plurality of printing units, each having a circulating, printing plates carrying and guided around a plate cylinders printing tape.

Die Erfindung betrifft ferner eine Druckmaschine mit mehreren Druckwerken, die jeweils ein umlaufendes, Druckklischees tragendes und ein um einen Plattenzylinder geführtes Druckband und eine Farbauftragseinrichtung aufweisen, und mit einer Rollen aufweisenden Druckbahnführung mit Andruckeinrichtungen zum Andrücken der Druckbahn an das Druckband mit den Druckklischees.The invention further relates to a printing machine having a plurality of printing units, each having a circulating, printing plates carrying and a plate cylinder guided pressure belt and an inking device, and having a roller having print path guide with pressure means for pressing the printing web to the printing tape with the printing plates.

Das Bedrucken von Druckbahnen, insbesondere Papierbahnen, erfolgt regelmäßig dadurch, dass die Papierbahn schlingenförmig in verschiedene Druckwerke hineingeführt wird, wobei beim Übergang von einem Druckwerk zum anderen regelmäßig eine Umlenkung um beispielsweise 180° stattfindet.The printing of printing webs, in particular paper webs, is carried out regularly in that the paper web is looped into different printing units, wherein during the transition from one printing unit to another regularly takes place a deflection of for example 180 °.

Für den Druck kleinerer Auflagen, wie sie für bedruckte Verpackungen häufig benötigt werden, haben sich Flexo-Druckmaschinen bewährt, wie sie beispielsweise aus der DE 44 10 132 C2 bekannt sind. Das Druckklischee befindet sich dabei als flexibles Material auf einem umlaufenden Druckband, das über einen Druckzlinder geführt wird, wo in Zusammenarbeit mit einem Gegendruckzylinder die zwischen den beiden Zylindern durchlaufende Druckbahn bedruckt wird.For printing smaller runs, as they are often required for printed packaging, flexo printing machines have proven, as they are known for example from DE 44 10 132 C2. The printing plate is located here as a flexible material on a circulating printing belt, which is guided over a Druckzlinder, where in co-operation with a counter-pressure cylinder, the printing line passing between the two cylinders is printed.

Die bekannten Druckverfahren sind bewährt und ohne Probleme bei Druckbahnen verwendbar, die eine ausreichende Zugstabilität aufweisen, um die beim Durchlaufen der Druckbahn durch Zylinderspalte von angetriebenen Zylindern auf die zwischen Umlenkzylindern frei laufenden Druckbahn ausgeübten Zugkräfte aufzunehmen.The known printing methods are proven and can be used without problems in printing webs which have sufficient tensile stability in order to absorb the tensile forces exerted during the passage of the printing web through the cylinder gaps of driven cylinders onto the pressure web running freely between deflection cylinders.

Problematisch sind die bekannten Druckverfahren dieser Art für Druckbahnen, die eine geringere Eigenstabilität und/oder insbesondere eine größere Elastizität aufweisen, wodurch größere Zugkräfte nicht angewendet werden dürfen.The known printing methods of this type are problematic for printing webs which have a lower intrinsic stability and / or in particular a greater elasticity, whereby larger tensile forces must not be used.

Für die Bedruckung derartiger Druckbahnen ist es bekannt, einen großen Zentralzylinder vorzusehen, über dessen Umfang die Druckwerke verteilt sind. Für den Druckvorgang wird die Druckbahn auf dem Umfang der Zentralwalze ohne Relativgeschwindigkeit transportiert und dabei bedruckt. Auf diese Weise gelingt die Bedruckung auch von Druckbahnen mit einer geringen Eigenstabilität, jedoch unter In-Kauf-Nahme erheblicher Nachteile. Bei der Verwendung eines Zentralzylinders sind bisher noch keine Band-Druckwerke einsetzbar, da die Druckwerke radial vom Zentralzylinder aus gesehen angeordnet werden müssen und somit unterschiedlich ausgerichtet sind. Auf die umlaufenden, mit einer Spannwalze gespannten Druckbänder wirken daher durch das Eigengewicht unterschiedliche Kräfte ein, die zu unterschiedlichen Druckergebnissen bei den verschiedenen Druckwerken führen. Bei der Verwendung herkömmlicher Druckzylinder muss bei einer Änderung der Größe des Druckrapports ein Austausch der Druckzylinder vorgesehen werden. Außerdem erlauben die Druckzylinder nur Rapportlängen bis zu 2,5 m, während mit Druckbändern deutlich größer Rapportlängen realisierbar sind.For the printing of such printing webs, it is known to provide a large central cylinder, over the circumference of the printing units are distributed. For printing, the printing web is transported on the circumference of the central roller without relative speed and thereby printed. In this way, the printing of printing lines with a low intrinsic stability succeeds, but under acquisition of considerable disadvantages. When using a central cylinder so far no tape printing units are used, since the printing units must be arranged radially from the central cylinder seen and thus are aligned differently. Therefore, due to the dead weight, different forces act on the peripheral pressure belts, which are tensioned with a tensioning roller, which lead to different pressure results in the various printing units. When using conventional printing cylinders, an exchange of the printing cylinders must be provided when changing the size of the print repeat. In addition, the printing cylinders allow only repeat lengths up to 2.5 m, while with printing tapes significantly longer repeat lengths can be realized.

Eine ähnliche Anordnung mit den prinzipiell gleichen Nachteilen hinsichtlich der Druckergebnisse ist durch GB-A-2188003 bekannt. Anstelle der Zentralwalze ist eine zentrale Anordnung eines Stützbandes vorgesehen, das endlos auf einer gekrümmten Bahn umlaufend mit Stützrollen geführt wird. Die Druckwerke sind mit Klischeezylindern gebildet, die bei einer Änderung der Drucklänge ausgewechselt werden müssen. Die Druckwerke befinden sich radial außerhalb von zwischen den Stützrollen angeordneten Gegendruckzylindern.A similar arrangement with the basically same disadvantages with respect to the printing results is known from GB-A-2188003. Instead of the central roller, a central arrangement of a support band is provided, which is endlessly guided on a curved track circumferentially with support rollers. The printing units are formed with cliché cylinders, which must be replaced when changing the printing length. The printing units are located radially outside of arranged between the support rollers counter-pressure cylinders.

Durch US 2,649,044 ist eine Druckanordnung für die Bedruckung von Stoffbahnen bekannt, bei der die Stoffbahn mehrfach umgelenkt und gespannt wird und anschließend in Kontakt mit einem geradlinig geführten Stützband durch drei nebeneinander angeordnete Druckwerke transportiert wird, um drei Bedruckungen zu erhalten. Nach der Bedruckung wird die Stoffbahn mehrfach umgelenkt und schlaufenförmig durch einen Trockner geleitet und anschließend zusammengelegt. Die Stoffbahn weist daher eine ausreichende Zugstabilität auf. Für einen Wechsel der Bedruckung und des Druckrapports müssen die Druckzylinder ausgetauscht werden.By US 2,649,044 a printing arrangement for the printing of panels is known in which the fabric is repeatedly deflected and stretched and then transported in contact with a rectilinear guided support belt by three juxtaposed printing units to obtain three prints. After printing, the fabric is deflected several times and looped through a dryer and then merged. The fabric therefore has sufficient tensile strength. To change the printing and the print repeat, the impression cylinders must be replaced.

Der Erfindung liegt demgegenüber die Problemstellung zugrunde, eine Bedruckung einer Druckbahn auch mit einer geringen Eigenstabilität durch mehrere Druckwerke mit einer einfach aufgebauten und flexibel zu ändernden Druckmaschine zu ermöglichen.The invention is based on the problem to enable a printing of a printing web with a low intrinsic stability by multiple printing units with a simple design and flexible to be changed printing press.

Zur Lösung dieses Problems ist erfindungsgemäß ein Verfahren der eingangs erwähnten Art dadurch gekennzeichnet, dass die Druckbahn im Bereich der Druckwerke auf einem mit gleicher Geschwindigkeit transportierten, im Wesentlichen geradlinig geführten Stützband geführt wird und dass die mehrfache Bedruckung durch die in der Transportrichtung des Stützbandes nebeneinander angeordneten Druckwerke erfolgt.To solve this problem according to the invention a method of the type mentioned above is characterized in that the printing web is guided in the area of the printing units on a transported at the same speed, guided substantially rectilinear support belt and that the multiple printing arranged side by side in the transport direction of the support belt Printing works done.

Das erfindungsgemäße Verfahren erlaubt die Verwendung insbesondere von Band-Druckwerken, die aufgrund ihrer flexiblen Verwendbarkeit erhebliche Vorteile mit sich bringen. Die Bedruckung auch von Druckbahnen mit einer geringen Eigenstabilität und/oder größeren Elastizität gelingt dadurch, dass die Druckbahn im Bereich der Druckwerke zusammen mit einem Stützband transportiert wird, zu dem die Druckbahn keine Relativgeschwindigkeit aufweist, sodass die Druckbahn über den Transportweg durch die Druckwerke jederzeit flächig abgestützt wird. Bei der im Wesentlichen geradlinigen Führung des Stützbandes werden auf die Druckbahn keine durch Umlenkbewegung auf verschiedenen Radien erzeugte Spannungen ausgeübt. In einer weiter bevorzugten Ausführungsform ist die Führung der Druckbahn ideal geradlinig. Eine im Wesentlichen geradlinige Führung im Sinne dieser Anmeldung liegt auch dann noch vor, wenn kleinere Umlenkungen unter 45°, vorzugsweise unter 20°, vorkommen. Geringfügige Umlenkungen innerhalb der genannten Grenzen sind für die vorliegende Erfindung unschädlich.The method according to the invention allows the use in particular of ribbon printing units, which bring considerable advantages due to their flexible usability. The printing of printing webs with a low intrinsic stability and / or greater elasticity succeeds in that the printing web in the region of Printing units is transported together with a support belt to which the printing web has no relative speed, so that the printing web is supported over the transport path through the printing units at all times flat. In the substantially rectilinear guidance of the support band, no stresses generated by deflecting movement at different radii are exerted on the pressure track. In a further preferred embodiment, the guide of the printing web is ideally straight. A substantially rectilinear guidance within the meaning of this application is still present even if smaller deflections below 45 °, preferably below 20 °, occur. Minor deflections within said limits are harmless to the present invention.

Vorzugsweise erfolgt die Bedruckung in Transportrichtung mit gleichen Abständen, also äquidistant.Preferably, the printing takes place in the transport direction at equal intervals, ie equidistant.

Die vorliegende Erfindung wird bevorzugt bei einer Bedruckung von Rolle zu Rolle eingesetzt. Es ist jedoch auch möglich, die Druckbahn nach der Bedruckung sofort in geeignete Bahnabschnitte aufzuteilen.The present invention is preferably used in a roll-to-roll printing. However, it is also possible to divide the printing web immediately after printing in suitable track sections.

Das erfindungsgemäße Verfahren erlaubt eine vorteilhafte Anordnung der Druckwerke parallel zueinander, vorzugsweise in parallelen Ständern einer Druckmaschine. Dadurch sind die Druckwerke für Wartungsarbeiten oder für einen Druckwechsel in einfacher Weise zugänglich. Etwaige Neueinstellungen des Flexo-Druckwerks können in einfacher Weise ohne Schwierigkeiten ausgeführt werden. Wenn die Druckbahn geradlinig, vorzugsweise oberhalb der Plattenzylinder verläuft, ist die Zugänglichkeit zu den Druckwerken nicht durch den Verlauf der Druckbahn behindert.The inventive method allows an advantageous arrangement of the printing units parallel to each other, preferably in parallel stands of a printing press. As a result, the printing units for maintenance or for a pressure change in a simple manner accessible. Any readjustments of the flexographic printing unit can be carried out in a simple manner without difficulty. If the printing web is rectilinear, preferably above the plate cylinder, the accessibility to the printing units is not hindered by the course of the printing web.

Zur Lösung des oben erwähnten Problems ist ferner eine Druckmaschine der eingangs erwähnten Art dadurch gekennzeichnet, dass die Druckbahnführung durch die Druckwerke hindurch durch ein mit der Geschwindigkeit der Druckbahn bewegtes Stützband gebildet ist und dass die Druckwerke an entlang dem Stützband ausgerichteten Maschinenständern ausgebildet sind, wobei das Stützband im Wesentlichen geradlinig läuft.To solve the above-mentioned problem, a printing machine of the type mentioned above is further characterized in that the printing web guide is formed by the printing units through a support belt moved at the speed of the printing web and that the printing units are formed on machine stands aligned along the support belt, wherein the Support band runs essentially straight.

Dabei sind die Druckwerke vorzugsweise an parallel angeordneten Maschinenständern gelagert, die Plattenzylinder der Druckwerke im Druckzustand auf gleicher Höhe angeordnet und ein im Wesentlichen horizontaler Verlauf des Stützbandes oberhalb des Plattenzylinders vorgesehen.The printing units are preferably mounted on parallel machine stands, arranged the plate cylinder of the printing units in the printing state at the same height and provided a substantially horizontal course of the support belt above the plate cylinder.

Das Stützband kann über Stützrollen umlaufen, wobei die Stützrollen zur Abstützung der Druckbahn vorzugsweise dicht an dicht angeordnet sind. Andere Stützeinrichtungen können ebenfalls verwendet werden, wie beispielsweise Gleitbleche.The support belt can rotate over support rollers, wherein the support rollers for supporting the printing web are preferably arranged close to tight. Other support means may also be used, such as sliding plates.

In einer vorteilhaften Ausführungsform der erfindungsgemäßen Druckmaschine ist gegenüberliegend von den Plattenzylindern jeweils ein Gegendruckzylinder angeordnet, der vorzugsweise tangential mit den Stützrollen fluchtet, sodass ein geradliniger Verlauf des Stützbandes auch im Bereich des Gegendruckzylinders erhalten bleiben kann. Die Druckbahn verläuft auf der dem Gegendruckzylinder abgewandten Seite des Stützbandes.In an advantageous embodiment of the printing press according to the invention a counter-pressure cylinder is arranged opposite each of the plate cylinders, which is preferably aligned tangentially with the support rollers, so that a straight course of the support belt can be maintained in the area of the impression cylinder. The printing web runs on the side facing away from the impression cylinder side of the support band.

Die Druckwerke können zur Aufnahme unterschiedlich langer Druckbänder eingerichtet sein, also insbesondere Flexo-Druckwerke sein.The printing units can be set up to receive print belts of different lengths, that is to say be flexographic printing units in particular.

Das Stützband wird zweckmäßigerweise schlupffrei angetrieben und ist vorzugsweise zur Ausbildung eines Formschlusses mit einem Antriebselement ausgebildet.The support belt is expediently driven slip-free and is preferably designed to form a positive connection with a drive element.

Die Erfindung soll im Folgenden anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert werden. Es zeigen:

Figur 1 -
eine schematische Seitenansicht einer erfindungsgemäßen Druckmaschine zur Bedruckung einer Druckbahn von Rolle zu Rolle mit vier Druckwerken
Figur 2 -
eine vergrößerte Darstellung eines der in Figur 1 vorgesehenen Druckwerke.
The invention will be explained in more detail below with reference to an embodiment shown in the drawing. Show it:
FIG. 1 -
a schematic side view of a printing machine according to the invention for printing a printing web from roll to roll with four printing units
FIG. 2 -
an enlarged view of one of the provided in Figure 1 printing units.

In der Darstellung der Figur 1 läuft eine Druckbahn 1 von einer Vorratsrolle 2 in eine Druckzone 3 und wird im bedruckten Zustand auf eine Aufwickelrolle 4 aufgewickelt. In der Druckzone 3 befinden sich vier Druckwerke 5, die als Band-Druckwerke an vertikalen Ständern 6 befestigt sind. Jedes Druckwerk 5 weist somit ein über einen Plattenzylinder 7 und eine Spannwalze 8 endlos umlaufendes Druckband 9 auf, auf dem das Druckklischee bildende flexible Platten befestigt werden.In the representation of FIG. 1, a printing web 1 runs from a supply roll 2 into a printing zone 3 and is wound onto a take-up reel 4 in the printed state. In the printing zone 3 there are four printing units 5, which are attached as tape printing units on vertical uprights 6. Each printing unit 5 thus has an over a plate cylinder 7 and a tension roller 8 endlessly circulating pressure belt 9, on which the printing plate forming flexible plates are attached.

Die Plattenzylinder 7 befinden sich im Druckzustand alle auf gleicher Höhe, sodass die Druckbahn 1 horizontal über die jeweils horizontale Tangente der Plattenzylinder 7 verläuft.The plate cylinder 7 are all in the print state at the same height, so that the printing web 1 runs horizontally over the respective horizontal tangent of the plate cylinder 7.

In der Druckzone 3, also im Bereich der Druckwerke 5 läuft die Druckbahn 1 zusammen mit einem Stützband 10 durch die Druckwerke 5 hindurch. Das Stützband 10 läuft endlos zwischen zwei Umlenkrollen 11 mit einem horizontal verlaufenden Untertrum 12 um. An dem horizontal verlaufenden Untertrum 12 liegt die Druckbahn an, die mit der gleichen Bahngeschwindigkeit bewegt wird wie das Stützband 10. Von der der Druckbahn 1 gegenüberliegenden Seite des Untertrums 12 drückt im Bereich der Plattenzylinder 7 jeweils ein ortsfest angeordneter Gegendruckzylinder 13 gegen den Untertrum 12 und die Druckbahn 1. Beim Durchlaufen des Spalts zwischen Plattenzylinder 7 und Gegendruckzylinder 13 wird die Druckbahn 1 bedruckt.In the printing zone 3, that is in the area of the printing units 5, the printing web 1 passes through the printing units 5 together with a support belt 10. The support belt 10 runs endlessly between two deflection rollers 11 with a horizontally extending lower run 12. On the horizontally extending Untertrum 12 is the printing web, which is moved at the same web speed as the support belt 10. From the printing web 1 opposite side of Untertrums 12 presses in the plate cylinder 7 each a fixedly arranged impression cylinder 13 against the Untertrum 12 and the Printing web 1. When passing through the gap between the plate cylinder 7 and counter-pressure cylinder 13, the printing web 1 is printed.

In Figur 1 ist durch eine schematisch eingezeichnete Bedienperson 14 verdeutlicht, dass der Zwischenraum zwischen den Druckwerken 5 bequem begehbar ist, sodass die Druckwerke 5 zu Wartungs- und Einrichtungszwecken bequem und ohne Schwierigkeiten zugänglich sind.In Figure 1 is illustrated by a schematically drawn operator 14 that the gap between the printing units 5 is easily accessible, so that the printing units 5 are easily accessible for maintenance and furnishing purposes and without difficulty.

Das Stützband 10 wird im Bereich seines Untertrums 12 auf der der Druckbahn 1 gegenüberliegenden Seite durch in Transportrichtung dicht an dicht liegende Stützrollen 12' abgestützt und im Kontakt mit der Druckbahn 1 gehalten. Der Kontakt mit der Druckbahn 1 wird dadurch intensiviert, dass die Druckbahn 1 vor dem Eintritt in die Druckzone 3 und nach dem Austritt aus der Druckzone 3 über Umlenkrollen 16 geführt wird, durch die die Druckbahn gegenüber dem horizontalen Verlauf durch die Druckzone 3 hindurch geringfügig auf der Strecke zwischen Umlenkrolle 16 und der zugehörigen Umlenkrolle 11 des umlaufenden Druckbandes 10 nach oben mit einem Winkel < 10° ausgelenkt wird.The support belt 10 is supported in the region of its lower run 12 on the opposite side of the printing web 1 by in the transport direction close to lying close support rollers 12 'and held in contact with the printing web 1. The contact with the printing web 1 is intensified by the fact that the printing web 1 is guided before entering the printing zone 3 and after exiting the printing zone 3 via deflection rollers 16, through which the printing web against the horizontal course through the print zone 3 through slightly the distance between deflection roller 16 and the associated deflection roller 11 of the rotating pressure belt 10 is deflected upward at an angle <10 °.

Figur 2 verdeutlicht in einer schematischen Darstellung den Aufbau eines Druckwerks 5. Durch einen vertikalen Doppelpfeil ist angedeutet, dass die untere Spannwalze 8 an dem vertikalen Ständer 6 in vertikaler Richtung verfahrbar ist, um das umlaufende Druckband 9 zu spannen. Der Druckvorgang findet in dem Spalt zwischen Plattenzylinder 7 und Gegendruckzylinder 13 statt, durch den das Druckband 9, aber auch die Anordnung aus Druckbahn 1 und Untertrum 12 des Stützbandes 10 hindurchlaufen. Vor dem Eintreten des Druckbandes 9 in den genannten Spalt zwischen Plattenzylinder 7 und Gegendruckzylinder 13 wird auf die Außenseite des Druckbandes 9 bzw. eines darauf aufgebrachten Klischees durch eine Farbauftragwalze 17 Farbe in der gewünschten Menge aufgetragen. Hierzu ist die als Rasterwalze ausgebildete Farbauftragwalze 17 mit einer Linearführung 18 gegen den Umfang des Plattenzylinders 7 mittels eines Servomotors 19 zustellbar. Die Zustellung der Farbauftragwalze 17 erfolgt über eine mittels eines Riemenantriebs 20 angetriebene und innerhalb eines Faltenbalgs 21 geführten (nicht dargestellten) Spindel. Der Rotationsantrieb der Farbauftragswalze 17 erfolgt über einen (nicht dargestellten) drehzahlgeregelten Servomotor.Figure 2 illustrates in a schematic representation of the structure of a printing unit 5. By a vertical double arrow is indicated that the lower tension roller 8 is movable on the vertical stand 6 in the vertical direction to tension the rotating pressure belt 9. The printing process takes place in the gap between the plate cylinder 7 and impression cylinder 13, through which the pressure belt 9, but also the arrangement of printing web 1 and Untertrum 12 of the support belt 10 pass. Prior to the entry of the printing tape 9 in said gap between the plate cylinder 7 and counter-pressure cylinder 13 is applied to the outside of the printing tape 9 and a cliché applied thereto by an inking roller 17 color in the desired amount. For this purpose, designed as an anilox roller inking roller 17 is deliverable with a linear guide 18 against the circumference of the plate cylinder 7 by means of a servo motor 19. The delivery of Ink application roller 17 via a driven by a belt drive 20 and within a bellows 21 guided (not shown) spindle. The rotary drive of the inking roller 17 via a (not shown) speed-controlled servo motor.

In entsprechender Weise ist der Plattenzylinder 7 mittels einer Linearführung 22 und einem Servomotor 23 und über eine Spindel 24 gegen die ortsfeste Gegendruckrolle 13 drückbar. Die Drehbewegung des Plattenzylinders 7 wird durch einen drehzahlgeregelten Servomotor 25 bewirkt.In a corresponding manner, the plate cylinder 7 can be pressed by means of a linear guide 22 and a servo motor 23 and a spindle 24 against the stationary counter-pressure roller 13. The rotational movement of the plate cylinder 7 is effected by a speed-controlled servomotor 25.

Das dargestellte Druckwerk eignet sich in Verbindung mit der in Figur 1 dargestellten Anordnung insbesondere zum Drucken großer Druckrapporte. Der , Druckrapport kann durch Ersetzen des Druckbandes 9 gegen ein Druckband 9 einer anderen Länge schnell und unkompliziert verändert werden. Durch die vertikal verstellbare Spannwalze 8 ist einerseits ein Austausch ohne weiteres möglich und kann andererseits die benötigte Spannung schnell wieder eingestellt werden.The printing unit shown is suitable in connection with the arrangement shown in Figure 1 in particular for printing large Druckrapporte. The, pressure repeat can be changed by replacing the pressure belt 9 against a pressure belt 9 of a different length quickly and easily. By the vertically adjustable tension roller 8, on the one hand, a replacement readily possible and on the other hand, the required voltage can be quickly adjusted again.

Die erfindungsgemäße Druckmaschine zeichnet sich daher durch eine hohe Flexibilität aus, indem eine kurzfristige Umrüstung der Druckmaschine auf einen anderen Druckrapport möglich ist.The printing machine according to the invention is therefore characterized by a high degree of flexibility in that a short-term conversion of the printing press to another print repeat is possible.

Claims (15)

  1. A method for printing a print web (1) by means of a plurality of printing units (5),characterized in that the print web (1) is guided in the region of the printing units (5) on a supporting belt (10) transported at the same speed, and in that the multiple printing is carried out by means of the printing units (5) arranged beside one another in the transport direction of the supporting belt (10).
  2. The method as claimed in claim 1, characterized in that the printing is carried out equidistantly in the transport direction.
  3. The method as claimed in claim 1 or 2, characterized in that the printing is carried out from roll (2) to roll (4).
  4. The method as claimed in one of claims 1 to 3, characterized in that, in the printing unit (5), the print web (1) with the supporting belt (10) is transported through between a. plate cylinder (7) and an impression cylinder (13), the print web (1) being guided on the side of the supporting belt (10) facing away from the impression cylinder (13) .
  5. The method as claimed in one of claims 1 to 4, characterized in that the supporting belt (10) is guided over supporting rollers (12') arranged in a fixed location.
  6. The method as claimed in claim 5, characterized in that the supporting rollers (12') are arranged close together.
  7. A printing machine having a plurality of printing units (5), which each have a circulating printing belt (9) carrying a printing plate and a printing belt (9) guided around a plate cylinder (7) and an ink applicator device (17), and having a print web guidance system with rollers and pressing devices (13) for pressing the print web (1) onto the printing belt (9) with the printing plate, characterized in that the print web guidance through the printing units (5) is formed by a supporting belt (10) moved at the speed of the print web (1), and that the printing units (5) are constructed on machine stands (6) aligned along the supporting belt (10), the supporting belt preferably running substantially rectilinearly.
  8. The printing machine as claimed in claim 7, characterized in that the printing units (5) are mounted on machine stands (6) which are arranged in parallel, in that the plate cylinders (7) of the printing units (5) are arranged at the same height in the printing state, and in that the supporting belt (10) runs substantially horizontally above the plate cylinders (7).
  9. The printing machine as claimed in claim 7 or 8, characterized in that the supporting belt (10) circulates over supporting rollers (12').
  10. The printing machine as claimed in claim 9, characterized in that the supporting rollers (12') are arranged close together.
  11. The printing machine as claimed in one of claims 7 to 10, characterized in that in each case an impression cylinder (13) is arranged opposite the plate cylinders (7).
  12. The printing machine as claimed in claim 11, characterized in that the impression cylinder (13) is aligned tangentially with the supporting rollers (12').
  13. The printing machine as claimed in claim 11 or 12, characterized in that the print web (1) is guided through the printing unit (5) with the supporting belt (10) on the side facing away from the impression cylinder (13).
  14. The printing machine as claimed in one of claims 7 to 13, characterized in that the printing units (5) are set up to accommodate printing belts (9) of different lengths.
  15. The printing machine as claimed in one of claims 7 to 14, characterized by a slip-free drive of the supporting belt.
EP03799442A 2003-01-08 2003-12-30 Printing machine and method for printing a print web Expired - Lifetime EP1581391B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10300502 2003-01-08
DE10300502A DE10300502A1 (en) 2003-01-08 2003-01-08 Printing machine and method for printing on a printing web
PCT/DE2003/004258 WO2004062915A1 (en) 2003-01-08 2003-12-30 Printing machine and method for printing a print web

Publications (2)

Publication Number Publication Date
EP1581391A1 EP1581391A1 (en) 2005-10-05
EP1581391B1 true EP1581391B1 (en) 2007-03-21

Family

ID=32602470

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03799442A Expired - Lifetime EP1581391B1 (en) 2003-01-08 2003-12-30 Printing machine and method for printing a print web

Country Status (7)

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US (1) US20060150837A1 (en)
EP (1) EP1581391B1 (en)
AT (1) ATE357336T1 (en)
AU (1) AU2003299273A1 (en)
DE (2) DE10300502A1 (en)
ES (1) ES2281694T3 (en)
WO (1) WO2004062915A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140196621A1 (en) * 2011-04-29 2014-07-17 Manroland Web Systems Gmbh Rotary offset printing machine and method for printing on substrates
DE102011119088A1 (en) 2011-11-22 2013-05-23 Gallus Druckmaschinen Gmbh Flexographic printing unit with toggle lever system
DE102014101435B4 (en) * 2014-02-05 2015-09-03 CONPRINTA GmbH & Co. KG Printing unit for a flexographic printing machine

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Publication number Priority date Publication date Assignee Title
US2139164A (en) * 1931-11-16 1938-12-06 Theodore E Knowlton Method and apparatus for preventing slipping in printing
US2142148A (en) * 1936-11-25 1939-01-03 Printcote Co Inc Rotary printing press
US2408143A (en) * 1944-01-15 1946-09-24 William C Huebner Apparatus for multicolor printing with electro lines of force
US2649044A (en) * 1947-08-11 1953-08-18 Dungler Julien Web feed means for rotary printing machines
US2533985A (en) * 1947-09-12 1950-12-12 Aronstein Joseph Process for multicolor printing on flocked area of fabric
DE1864031U (en) * 1961-11-18 1962-12-20 Dornbusch & Co MULTICOLOR PRINTING DEVICE FOR FILMS MADE OF THERMOPLASTIC PLASTIC AND SIMILAR THIN AREA-LIKE GOODS.
GB1057456A (en) * 1964-08-27 1967-02-01 Colodense Ltd Multi-colour printing of flexible materials
US3934505A (en) * 1973-12-10 1976-01-27 Bernard Screen Printing Corporation Method and apparatus for synchronous printing of a moving web
NL8302812A (en) * 1983-08-10 1985-03-01 Anderson & Vreeland Bv Flexographic printing press - has endless non-stretching belt running through printing mechanisms with impression cylinders
DE3442732A1 (en) * 1984-11-23 1986-06-05 Karl-Heinz 4800 Bielefeld Honsel FLEXO PRINTING MACHINE
EP0290850B1 (en) * 1987-05-07 1991-10-09 Conprinta Ltd. Flexographic-printing machine, in particular for background printing
EP0311217B1 (en) * 1987-10-09 1992-01-22 Stork Brabant B.V. Multicolor, rotary screen printing machine
DE4410132C2 (en) * 1994-03-24 1996-07-25 Thimm Verpackung Gmbh & Co Flexographic printing machine, in particular for multi-color printing
US5729817A (en) * 1996-10-17 1998-03-17 Accent Color Sciences, Inc. Accent printer for continuous web material
US6557465B2 (en) * 2001-02-20 2003-05-06 Corrugated Gear & Services, Inc. Printing machine with dual ink applicators

Also Published As

Publication number Publication date
WO2004062915A1 (en) 2004-07-29
EP1581391A1 (en) 2005-10-05
DE10300502A1 (en) 2004-07-29
ES2281694T3 (en) 2007-10-01
US20060150837A1 (en) 2006-07-13
AU2003299273A1 (en) 2004-08-10
DE50306875D1 (en) 2007-05-03
ATE357336T1 (en) 2007-04-15

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