EP2091734B1 - Printing machine for printing on a substrate - Google Patents
Printing machine for printing on a substrate Download PDFInfo
- Publication number
- EP2091734B1 EP2091734B1 EP07822441A EP07822441A EP2091734B1 EP 2091734 B1 EP2091734 B1 EP 2091734B1 EP 07822441 A EP07822441 A EP 07822441A EP 07822441 A EP07822441 A EP 07822441A EP 2091734 B1 EP2091734 B1 EP 2091734B1
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- EP
- European Patent Office
- Prior art keywords
- printing press
- impression cylinder
- cylinder
- printing
- sleeve
- 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.)
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Images
Classifications
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F7/00—Rotary lithographic machines
- B41F7/02—Rotary lithographic machines for offset printing
- B41F7/10—Rotary lithographic machines for offset printing using one impression cylinder co-operating with several transfer cylinders for printing on sheets or webs, e.g. satellite-printing units
Definitions
- the invention relates to a printing machine for printing a printing material web.
- plastic films are often used as substrate, which are stretchable.
- the elasticity increases with the heat.
- a strong heat input takes place through the drying devices, which frequently apply hot air to the printing material.
- plastic films, but also other materials are often printed on so-called central cylinder printing machines.
- the printing material web which rests on the central impression cylinder, can be passed by mostly several inking units, which can print them with different colors and motifs.
- the printing material web must already rest completely on the central impression cylinder. After the printing material web has been brought from an unwinding device via one or more web guide rollers to the impression cylinder, it is usually pressed by means of a pressure roller to the impression cylinder, so that subsequently a displacement of the web can be excluded relative to the impression cylinder.
- the surface properties of the pressure roller are responsible for such problems. Under surface properties are z. B. to understand the material properties of the surface layers or coatings, but also the geometric properties such as the diameter of the pressure roller.
- the geometric properties also include, in particular, grooves or grooves, which may be introduced into the surface of a pressure roller in various embodiments.
- the object of the present invention is to propose a printing machine with which the risk of damage to the printing material webs is reduced.
- the pressure roller of a mandrel and at least one sleeve is assembled.
- the mandrel of the pressure roller is a relatively small cylinder-like body in its diameter, which is supported and held with its first end in the printing press.
- the second end of the mandrel is mounted in a holder which is hinged in the frame of the printing machine, which holder is removable from the second end of the mandrel.
- the sleeve is a sleeve-shaped body which is relative to the mandrel is movable.
- the sleeve or sleeve can be easily pulled down axially from the mandrel. Subsequently, a sleeve can be pushed onto the mandrel.
- a plurality of sleeves with different surface properties can be provided, from which a suitable for the material of the printing material sleeve can be selected in which the printing material carries as possible no damage.
- the surface properties may be determined by the nature of the surfaces (material, surface geometries), but also by the outer diameter of the sleeve.
- sleeves are also used whose surfaces are at least partially provided with grooves.
- the pressure rollers of the invention comprise sleeves which are at least partially covered with rubber flooring whose Shore hardnesses are between 60 and 80 Shore.
- the invention also offers advantages when the properties of the sleeve have changed due to wear in the course of printing operation.
- a spare sleeve can be kept ready, which is then pushed onto the mandrel instead of the worn sleeve. Since now the removal, renewal or repair, such. As regrinding, and the incorporation of a conventional pressure roller is eliminated, the invention can lead to an enormous saving of time and thus to a significant reduction of expensive machine life.
- a hydraulic tensioning device can be provided, which is integrated in the mandrel and which cause an increase in diameter of the mandrel in certain axial sections when they are pressurized. The corresponding with these sections sections of the inner sleeve of the sleeve in this first variant of an unyielding material.
- the inner sleeve may consist of resilient materials.
- the inner diameter of the inner sleeve is slightly smaller than the outer diameter of the mandrel, so that a sleeve frictionally rests on the mandrel.
- compressed air is injected between the outer surface of the mandrel and the inner sleeve of the sleeve, so that the inner diameter of the sleeve increases. Then the sleeve can be moved without much effort. But other locking options are conceivable that avoids a relative movement of the sleeve to the mandrel.
- These include, for example, magnetic or magnetizable elements, one of which in or on the sleeve and a may be arranged in or on the mandrel.
- Other possibilities include elements and materials that change their dimensions due to electrical variables such as voltage. These include, for example, piezo elements.
- a mandrel can be designed so that both Sleeveditionn can be used on it.
- sleeve and mandrel are firmly connected or clamped together by mechanical means such as screws or wedges.
- the present invention includes a selection of nip rollers for use on a printing press, the nip rollers of which comprise a mandrel and a sleeve.
- this system of printing press and multiple sleeves comprises different sleeves, which at least partially comprise rubber flooring of different Shore hardness.
- the sleeves may additionally include pads with different grooving or smooth surfaces.
- an actuator is preferably provided at each end of the pressure roller. These actuators act on the pressure roller with the necessary for employment of the impression cylinder contact pressure.
- the actuators can act on linearly displaceable carriage, so that the Anstellweg is also rectilinear.
- the pressure roller is mounted in lever arms, so that the Anstellweg is located on a circular arc.
- the actuators then act on ends of these lever arms.
- spring elements act on the ends of the pressure roller, which act on the pressure roller with a force which contains at least one component which is directed away from the impression cylinder.
- the spring force of the spring elements is smaller than the maximum contact force of the actuators. This measure serves to ensure that, if the maximum force of the actuators can not be applied, the pressure roller is automatically removed from the impression cylinder.
- the maximum force can be exceeded, for example, by damage to the actuator or, in the case of compressed-air-operated piston-cylinder units, by a decrease in the air pressure.
- piston-cylinder units are provided as actuators, in which the aforementioned spring elements are integrated.
- the spring elements are based on the bottom of the cylinder, which is formed for example by the housing bottom, and act on the piston.
- FIG. 1 shows a functional diagram of a central cylinder flexographic printing machine 3 in the execution of a print job, to which all six inking units Fn are required. Therefore, all printing cylinders D1 to D6 are shown in their printing position.
- FIG. 2 shows various elements of a printing press 3 according to the invention in a perspective view.
- the plates 10, 11 are shown.
- These plates 10 and 11 are components of the machine frame, in which, inter alia, the impression cylinder 2 is rotatably mounted. Again, the substrate web 1 can be seen, which is guided around the impression cylinder 2 around.
- the illustration of printing unit or inking cylinder has been omitted in this figure.
- the pressure roller 4 comprises a mandrel 12, on which a sleeve 13 is applied, wherein the sleeve 13, after cancellation of a frictional connection, in the axial direction of the mandrel is displaceable.
- the mandrel 12 is mounted at both ends in suitable bearings 14, for example in ball or needle bearings.
- the bearings are connected to carriages which are linearly displaceable on frame-fixed guide rails 15.
- the pressure roller 4 is thus with a rectilinear motion to the impression cylinder. 2 unemployable.
- the bearings 14 may also be mounted in pivot arms, which are pivotable about a frame-fixed pivot point, so that the pressure roller 4 can be pivoted to the impression cylinder 2, as it is based on the FIGS. 5 to 9 will be described in more detail.
- the carriage can be released from the bearing 14 and moved, as shown in the figures with reference to the plate 10 associated carriage.
- the carriages may comprise shell pieces 17, a first of which is pivotally attached to a second so that the bearing 14 is clamped between both shell pieces 17 when the first is in the pivoted position.
- the shell pieces can be fixed to each other, which can be carried out for example by means of a screw connection.
- the screw connection can be made and released via a hand lever 19. After loosening the fixation and the moving away of the shell pieces 17, the path in the axial direction of the mandrel 12 is free in order to be able to remove the sleeve 13 unhindered.
- the movement mechanism assigned to the plate 10 for adjusting the pressure roller 4, which comprises the slide and the guide rail, is assigned to the side of the plate 10 facing away from the impression cylinder 2.
- the hand lever 19, which serves for releasing or for producing the screw connection between the two bearing pieces 17, can be easily reached by the machine operator without having to grasp through the window-like opening 18.
- the mandrel 2 passes through the aperture 18.
- actuators 20 such as piston-cylinder units, which are attached to the machine frame and on the carriage, with which the pressure roller is moved act.
- Each end of the pressure roller can a Be assigned actuator 20.
- Such an actuator can preferably be driven hydraulically, pneumatically or by electric motor.
- the contact force of the pressure roller is controllable, preferably adjustable. In this way, the adjusting force can be adapted in particular to the material of the printing material web.
- At least one actuator can occupy at least three predefined positions. The first of these is the position in which the pressure roller is employed on the impression cylinder, the second of which is the position in which the pressure roller is turned off by impression cylinder, that is no longer in contact with it. When moving to the third position of the relevant carriage is moved relative to the mandrel, so that the sleeve is then freely accessible to be withdrawn axially.
- the Fig. 3 shows again some in the FIG. 2 shown elements in the side view.
- FIGS. 4a and 4b show nip rollers 4, each comprising a mandrel 12 and a sleeve (sleeve) 13.
- the illustrated sleeves 13 are each covered on their outer surfaces with grooves 21, 22.
- the angles of the grooves which they occupy with the axis of rotation of the mandrel 12 are different in the figures. As an angle here is meant in each case the smallest angle, the axis of rotation and groove can take.
- the sleeves 13 in the FIGS. 4a and 4b So represent embodiments for sleeves 13 with different surface properties.
- the grooves make an angle of at least 45 degrees with respect to the axis of rotation.
- this angle is at most 45 degrees.
- FIG. 5 shows a further embodiment of a printing machine according to the invention.
- the bearing 14 is not complete in operation encompassed. Rather, a recess of the lever arm 30 surrounds the bearing 14.
- the lever arm 30 and the bearing 14 can also be connected to one another with a screw, for example a hand-operated knurled screw.
- This lever arm 30 is rotatably mounted on the pin 31, which is arranged fixed to the frame, so that it can be pivoted relative to the plate 10 and thus relative to the counter-pressure cylinder 2.
- the bearing 14 remote from the part of the lever arm 30 is pivotally connected to an actuator 32 at the pivot point 33.
- the actuator 32 is pivotally connected to the plate 10 at the pivot point 34.
- the actuator which is preferably configured as a compressed-air-operated piston-cylinder unit, thus moves the lever arm 30 so that it is pivoted away from the bearing 14 of the pressure roller by its operation, in the case of the piston-cylinder unit by the displacement of the piston rod 35. If the lever arm 30 and the bearing be connected to each other, as described above, the pressure roller 4 is lifted from the surface of the impression cylinder 2 by the actuation of the actuator 32.
- a piston-cylinder unit As an actuator, it can be acted upon with compressed air in both directions of movement (see Compressed air connections in FIG Fig. 10 ).
- the piston which is located within the piston-cylinder unit, can be pressurized from both sides with compressed air. This has the consequence that can be pressed by means of this unit, the pressure roller to the impression cylinder or swing.
- the use of a pneumatically actuable piston-cylinder unit is advantageous at this point, since the compressibility of air leads to a certain elastic effect.
- FIG. 6 shows the same view as the FIG. 5
- the lever arm 30, which may also be referred to as a roll holder, as far as pivoted away from the bearing 14 that the sleeve 13 on the visible end of the pressure roller 4 of the Anpresswalzendorn 12 is removable.
- a spring 36 is provided which acts on the lever arm 30 with a force, so that when no force is exerted on the lever arm by the actuator, the pressure roller remains pivoted away from the impression cylinder.
- a spring directly on the piston 37 see Fig. 10
- a spring is preferably used in the cylinder 38 (see Fig. 10 ).
- a compression spring is provided.
- Such a piston-cylinder unit with integrated spring element has the great advantage of a compact design.
- lever arm 30 and actuator 32 from each other in order to pivot the lever arm manually.
- the separation of this compound takes place approximately at the fulcrum 33.
- FIGS. 7 . 8 and 9 illuminated the bearing of the pressure roller on the drive side.
- the arranged on the operating side elements, already mentioned in the description of the Figures 5 and 6 have been entered into the FIGS. 7 to 9 not drawn.
- FIG. 7 illustrating a plan view of a printing press according to the invention
- the mandrel 12 of the pressure roller 4 is mounted in a further lever arm 40.
- the mandrel 12 is rotatably mounted in at least two axially spaced, but not shown bearings. Because of these two bearings, it is possible for the purpose of sleeve replacement to hold the mandrel 12 einindig, even if the lever arm 30 is no longer in contact with the bearing 14. The user-side end of the pressure roller is thus freely accessible.
- the lever arm 40 is rotatably mounted on the pin 41 in the plate 11, which may be part of the printing press frame, stored. This formed by the pivot 41 pivot axis of the lever arm 40 is aligned with the axis of rotation 31 of the lever arm 30.
- the lever arm 40 is movable by means of an actuator 42 which is coupled via a pivot joint 43 movable with the lever arm 40.
- the actuator 42 is also articulated via the hinge 44 pivotally connected to the plate 11, wherein this connection in the present embodiment comprises a holder 45 which is fixed to the plate 11.
- the actuator can be attached via the rotary joint directly to the plate 11.
- the lever arm 40 may be acted upon analogously to the lever arm 30 with a spring force, so that the pressure roller 4 on the drive side of Counterpressure cylinder is kept away when the actuator exerts no force.
- the actuator 42 may be configured analogously to the actuator 32. In particular, it can be identical. Both actuators 32, 42 are preferably compressed-air-operated piston-cylinder units.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rotary Presses (AREA)
- Dot-Matrix Printers And Others (AREA)
- Character Spaces And Line Spaces In Printers (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Abstract
Description
Die Erfindung betrifft eine Druckmaschine zum Bedrucken einer Bedruckstoffbahn.The invention relates to a printing machine for printing a printing material web.
Es sind verschiedene Arten von Druckmaschinen bekannt, wobei diese Bedruckstoffbögen oder -bahnen bedrucken können.There are various types of printing machines are known, which can print on these substrates sheets or sheets.
Gerade im Bereich des Verpackungsdrucks werden häufig bahnförmige Kunststofffolien als Bedruckstoff verwendet, die dehnbar sind. Die Dehnfähigkeit steigt allerdings mit der Wärme. Ein starker Wärmeeintrag erfolgt durch die Trocknungsvorrichtungen, die den Bedruckstoff häufig mit Heißluft beaufschlagen. Um eine Dehnung und die damit einhergehenden Registerfehler zu vermeiden, werden solche Kunststofffolien, aber auch andere Materialien, oft auf so genannten Zentralzylinder-Druckmaschinen bedruckt. Die Bedruckstoffbahn, die dabei auf dem zentralen Gegendruckzylinder aufliegt, ist an zumeist mehreren Farbwerken vorbei führbar, welche diese mit verschiedenen Farben und Motiven bedrucken können.Especially in the field of packaging printing web-shaped plastic films are often used as substrate, which are stretchable. However, the elasticity increases with the heat. A strong heat input takes place through the drying devices, which frequently apply hot air to the printing material. In order to avoid stretching and the associated register errors, such plastic films, but also other materials, are often printed on so-called central cylinder printing machines. The printing material web, which rests on the central impression cylinder, can be passed by mostly several inking units, which can print them with different colors and motifs.
Die Bedruckstoffbahn muss allerdings, bevor sie das in ihrer Laufrichtung erste Farbwerk erreicht, bereits vollständig auf dem zentralen Gegendruckzylinder aufliegen. Nachdem die Bedruckstoffbahn von einer Abwickeleinrichtung über eine oder mehrere Bahnführungswalzen an den Gegendruckzylinder herangeführt wurde, wird sie in der Regel mit Hilfe einer Anpresswalze an den Gegendruckzylinder angepresst, so dass anschließend eine Verschiebung der Bahn relativ zum Gegendruckzylinder ausgeschlossen werden kann.However, before it reaches the first inking unit in its running direction, the printing material web must already rest completely on the central impression cylinder. After the printing material web has been brought from an unwinding device via one or more web guide rollers to the impression cylinder, it is usually pressed by means of a pressure roller to the impression cylinder, so that subsequently a displacement of the web can be excluded relative to the impression cylinder.
Allerdings wurde in der Vergangenheit festgestellt, dass Bedruckstoffbahnen nach dem Anpressen auf den Gegendruckzylinder zum Teil Falten oder andere Beschädigungen aufwiesen. Solche Bedruckstoffbahnen oder zumindest deren Falten aufweisenden Abschnitte sind nicht mehr brauchbar und daher als Ausschuss zu entsorgen. Die Neigung, Falten zu zeigen, ist Beobachtungen zufolge stark vom Material der Bedruckstoffbahn abhängig. Insbesondere verhalten sich Papierbahnen anders als Kunststoffbahnen. Auch unterscheidet sich Flachmaterial in seinen Eigenschaften von Schlauchmaterial, bei dem zwei zusammenhängende, übereinander liegende Materiallagen über den Gegendruckzylinder geführt werden.However, it was found in the past that printed material webs had some wrinkles or other damage after being pressed onto the impression cylinder. Such printing material webs or at least their folds having sections are no longer useful and therefore to dispose of as a committee. The tendency to show wrinkles is, according to observations, strongly dependent on the material of the printing material web. In particular, paper webs behave differently than plastic webs. Also, flat material differs in its properties of tubing in which two contiguous, superimposed layers of material are passed over the impression cylinder.
Untersuchungen haben ergeben, dass für derartige Probleme die Oberflächeneigenschaften der Anpresswalze verantwortlich sind. Unter Oberflächeneigenschaften sind z. B. die Materialeigenschaften der Oberflächenschichten oder -beschichtungen, aber auch die geometrischen Eigenschaften wie etwa der Durchmesser der Anpresswalze zu verstehen. Zu den geometrischen Eigenschaften zählen insbesondere auch Nuten oder Rillen, die in verschiedenen Ausführungen in die Oberfläche einer Anpresswalze eingebracht sein können.Investigations have shown that the surface properties of the pressure roller are responsible for such problems. Under surface properties are z. B. to understand the material properties of the surface layers or coatings, but also the geometric properties such as the diameter of the pressure roller. The geometric properties also include, in particular, grooves or grooves, which may be introduced into the surface of a pressure roller in various embodiments.
Eine konventionelle Ausführung ist in
Die Aufgabe der vorliegenden Erfindung ist es, eine Druckmaschine vorzuschlagen, mit der die Gefahr von Beschädigungen der Bedruckstoffbahnen verringert wird.The object of the present invention is to propose a printing machine with which the risk of damage to the printing material webs is reduced.
Erfindungsgemäß wird diese Aufgabe durch die Merkmale des kennzeichnenden Teils des Anspruchs 1 gelöst. Demnach ist vorgesehen, dass die Anpresswalze aus einem Dorn und zumindest einem Sleeve zusammensetzbar ist. Der Dorn der Anpresswalze ist ein in seinem Durchmesser relativ kleiner zylinderartiger Körper, der mit seinem ersten Ende in der Druckmaschine gelagert und gehalten wird. Das zweite Ende des Dorns ist in einem Halter, welcher in dem Gestell der Druckmaschine angelenkt ist, gelagert, wobei dieser Halter von dem zweiten Ende des Dorns entfernbar ist. Der Sleeve ist ein hülsenförmiger Körper, welcher relativ zu dem Dorn bewegbar ist. Ist der Halter von dem zweiten Ende des Dorns entfernt worden, kann der Sleeve oder die Hülse auf einfache Weise in axialer Richtung von dem Dorn heruntergezogen werden. Anschließend kann ein Sleeve auf den Dorn aufgeschoben werden.According to the invention, this object is solved by the features of the characterizing part of
Zur Anpassung der Oberflächeneigenschaften der Anpresswalze reicht es also, lediglich den zumindest einen Sleeve in seinen Oberflächeneigenschaften an das zu bedruckende Material anzupassen. Dazu können mehrere Sleeves mit verschiedenen Oberflächeneigenschaften vorgehalten werden, aus denen ein zu dem Material der Bedruckstoffbahn passender Sleeve ausgewählt werden kann, bei dem die Bedruckstoffbahn möglichst keine Beschädigungen davon trägt. Die Oberflächeneigenschaften können dabei von der Art der Oberflächen (Material, Oberflächengeometrien), aber auch von dem Außendurchmesser der Hülse bestimmt sein.To adapt the surface properties of the pressure roller so it is sufficient to adapt only the at least one sleeve in its surface properties of the material to be printed. For this purpose, a plurality of sleeves with different surface properties can be provided, from which a suitable for the material of the printing material sleeve can be selected in which the printing material carries as possible no damage. The surface properties may be determined by the nature of the surfaces (material, surface geometries), but also by the outer diameter of the sleeve.
Diese Oberflächen können sich beispielsweise in ihrer Härte unterscheiden. So benötigt man zum Bedrucken von Schläuchen Anpresswalzen, die zumindest zum Teil Gummibeläge relativ großer Shorehärte umfassen, damit die zwischen den Folienbahnen eingeschlossene Luft, die zu Problemen beim Bedrucken führen kann, bei dem Anpressen auf den Gegendruckzylinder herausgedrückt werden kann. Nur dann liegen beide übereinander liegende Bahnen des Schlauches auch ausreichend gut auf dem Gegendruckzylinder auf.These surfaces may differ, for example, in their hardness. So you need for printing hoses press rollers, which at least partially rubber covers of relatively high Shore hardness, so that the trapped between the film web air, which can lead to problems when printing, can be pushed out in the pressing on the impression cylinder. Only then are both superimposed webs of the hose also sufficiently well on the impression cylinder.
Um die beschriebenen Probleme zu vermeiden, sind auch Sleeves einsetzbar, deren Oberflächen zumindest zum Teil mit Nuten versehen sind.In order to avoid the problems described, sleeves are also used whose surfaces are at least partially provided with grooves.
Bei anderen, einlagigen Folienbahnen oder auch bei Papierbahnen können diese harten Anpresswalzen jedoch zu Beschädigungen führen, insbesondere bei dünnen Folien. Daher sind hier Sleeves mit Gummibelägen niedriger Shorehärte vorteilhaft einsetzbar.In other, single-layer film webs or paper webs, however, these hard pressure rollers can cause damage, especially in thin films. Therefore, here sleeves with rubber coatings low Shore hardness can be used advantageously.
Bei diesen einlagigen Bedruckstoffbahnen können auch Sleeves eingesetzt werden, deren Oberflächen zumindest zum Teil glatt sind, das heißt keine Vertiefungen, wie etwa Nuten, umfassen.In these single-layer printing material webs and sleeves can be used, the surfaces of which are at least partially smooth, that is, no depressions, such as grooves include.
Bevorzugt umfassen die erfindungsgemäßen Anpresswalzen Sleeves, die zumindest zum Teil mit Gummibelägen belegt sind, deren Shorehärten zwischen 60 und 80 Shore liegen.Preferably, the pressure rollers of the invention comprise sleeves which are at least partially covered with rubber flooring whose Shore hardnesses are between 60 and 80 Shore.
Vorteile bietet die Erfindung auch dann, wenn sich im Laufe des Druckbetriebes die Eigenschaften der Hülse aufgrund von Verschleiß verändert haben. In diesem Fall kann ein Ersatzsleeve bereitgehalten werden, welcher dann anstelle des verschlissenen Sleeves auf den Dorn aufgeschoben wird. Da nun das Ausbauen, das Erneuern oder Reparieren, wie z. B. Nachschleifen, und das Einbauen einer herkömmlichen Anpresswalze entfällt, kann die Erfindung zu einer enormen Zeiteinsparung und damit zur deutlichen Verkürzung von teurer Maschinenstandszeit führen.The invention also offers advantages when the properties of the sleeve have changed due to wear in the course of printing operation. In this case, a spare sleeve can be kept ready, which is then pushed onto the mandrel instead of the worn sleeve. Since now the removal, renewal or repair, such. As regrinding, and the incorporation of a conventional pressure roller is eliminated, the invention can lead to an enormous saving of time and thus to a significant reduction of expensive machine life.
Da der Sleeve im Betrieb reibschlüssig auf dem Dorn aufliegen soll, aber zum Austausch leicht relativ zum Dorn bewegbar sein soll, ist es erforderlich, den Sleeve auf dem Dorn nach dem Aufschieben zu arretieren. Dazu kann eine hydraulische Spannvorrichtung vorgesehen werden, welche in dem Dorn integriert ist und welche eine Durchmesservergrößerung des Dorns in bestimmten axialen Abschnitten bewirken, wenn diese unter Druck gesetzt werden. Die mit diesen Abschnitten korrespondierenden Abschnitte der Innenhülse des Sleeves bestehen in dieser ersten Variante aus einem unnachgiebigen Material.Since the sleeve should rest on the mandrel in frictional engagement with the mandrel, but should be easy to move relative to the mandrel for replacement, it is necessary to lock the sleeve on the mandrel after sliding. For this purpose, a hydraulic tensioning device can be provided, which is integrated in the mandrel and which cause an increase in diameter of the mandrel in certain axial sections when they are pressurized. The corresponding with these sections sections of the inner sleeve of the sleeve in this first variant of an unyielding material.
In einer anderen Variante der Sleeves kann dessen Innenhülse aus nachgiebigen Materialien bestehen. Der Innendurchmesser der Innenhülse ist geringfügig kleiner als der Außendurchmesser des Dorns, so dass ein Sleeve reibschlüssig auf dem Dorn aufliegt. Zum Wechseln des Sleeves wird zwischen der Außenoberfläche des Dorns und der Innenhülse des Sleeves Druckluft eingeblasen, so dass sich der Innendurchmesser des Sleeves vergrößert. Dann kann der Sleeve ohne großen Kraftaufwand bewegt werden. Aber auch andere Arretierungsmöglichkeiten sind denkbar, die eine Relativbewegung des Sleeves zum Dorn vermeidet. Hierzu zählen zum Beispiel magnetische bzw. magnetisierbare Elemente, von denen eines im oder am Sleeve und ein anderes im oder am Dorn angeordnet sein kann. Als weitere Möglichkeiten seien Elemente und Materialien genannt, die aufgrund elektrischer Größen wie etwa Spannung ihre Abmaße ändern. Dazu zählen beispielsweise Piezoelemente.In another variant of the sleeves, the inner sleeve may consist of resilient materials. The inner diameter of the inner sleeve is slightly smaller than the outer diameter of the mandrel, so that a sleeve frictionally rests on the mandrel. To change the sleeve, compressed air is injected between the outer surface of the mandrel and the inner sleeve of the sleeve, so that the inner diameter of the sleeve increases. Then the sleeve can be moved without much effort. But other locking options are conceivable that avoids a relative movement of the sleeve to the mandrel. These include, for example, magnetic or magnetizable elements, one of which in or on the sleeve and a may be arranged in or on the mandrel. Other possibilities include elements and materials that change their dimensions due to electrical variables such as voltage. These include, for example, piezo elements.
Ein Dorn kann so ausgestaltet sein, dass beide Sleevevarianten auf ihm eingesetzt werden können. Selbstverständlich sind auch weitere Varianten denkbar, bei denen beispielsweise Sleeve und Dorn durch mechanische Mittel wie etwa Schrauben oder Keile miteinander fest verbunden bzw. verspannt werden.A mandrel can be designed so that both Sleevevarianten can be used on it. Of course, other variants are conceivable in which, for example, sleeve and mandrel are firmly connected or clamped together by mechanical means such as screws or wedges.
Die vorliegende Erfindung umfasst eine Auswahl von Anpresswalzensleeves zur Verwendung an einer Druckmaschine, deren Anpresswalzen einen Dorn und ein Sleeve umfassen. Vorteilhafterweise umfasst dieses System von Druckmaschine und mehreren Sleeves verschiedene Sleeves, welche zumindest zum Teil Gummibeläge unterschiedlicher Shorehärte umfassen. Die Sleeves können zusätzlich Beläge mit verschiedener Nutung oder glatten Oberflächen umfassen. Auf diese Weise kann durch Aufbringen geeigneter Sleeves den bereits oben beschriebenen Anforderungen beim Bedrucken von einlagigen oder mehrlagigen Bedruckstoffbahnen auf einfache Weise nachgekommen werden.The present invention includes a selection of nip rollers for use on a printing press, the nip rollers of which comprise a mandrel and a sleeve. Advantageously, this system of printing press and multiple sleeves comprises different sleeves, which at least partially comprise rubber flooring of different Shore hardness. The sleeves may additionally include pads with different grooving or smooth surfaces. In this way, by applying suitable sleeves, the requirements already described above for printing single-layer or multi-layer printing material webs can be met in a simple manner.
Zum Anstellen der Anpresswalze an den Gegendruckzylinder ist bevorzugt an jedem Ende der Anpresswalze ein Aktuator vorgesehen ist. Diese Aktuatoren beaufschlagen die Anpresswalze mit der zur Anstellung an den Gegendruckzylinder notwendigen Anpresskraft.For adjusting the pressure roller to the impression cylinder an actuator is preferably provided at each end of the pressure roller. These actuators act on the pressure roller with the necessary for employment of the impression cylinder contact pressure.
Dabei können die Aktuatoren auf geradlinig verschiebbare Schlitten wirken, so dass der Anstellweg ebenfalls geradlinig ist.The actuators can act on linearly displaceable carriage, so that the Anstellweg is also rectilinear.
In einem weiteren bevorzugten Ausführungsbeispiel ist die Anpresswalze in Hebelarmen gelagert, so dass der Anstellweg auf einem Kreisbogen liegt. Die Aktuatoren wirken dann auf Enden dieser Hebelarme.In a further preferred embodiment, the pressure roller is mounted in lever arms, so that the Anstellweg is located on a circular arc. The actuators then act on ends of these lever arms.
In weiterer Ausgestaltung der Erfindung wirken Federelemente auf die Enden der Anpresswalze, welche die Anpresswalze mit einer Kraft beaufschlagen, die zumindest eine Komponente enthält, die vom Gegendruckzylinder weg gerichtet ist. Die Federkraft der Federelemente ist allerdings kleiner als die maximale Anpresskraft der Aktuatoren. Diese Maßnahme dient dazu, dass, wenn die maximale Kraft der Aktuatoren nicht aufgebracht werden kann, die Anpresswalze automatisch vom Gegendruckzylinder entfernt wird. Die maximale Kraft kann beispielsweise durch Schäden am Aktuator oder, bei druckluftbetriebenen Kolbenzylindereinheiten, durch Nachlassen des Luftdrucks unterschritten werden.In a further embodiment of the invention, spring elements act on the ends of the pressure roller, which act on the pressure roller with a force which contains at least one component which is directed away from the impression cylinder. However, the spring force of the spring elements is smaller than the maximum contact force of the actuators. This measure serves to ensure that, if the maximum force of the actuators can not be applied, the pressure roller is automatically removed from the impression cylinder. The maximum force can be exceeded, for example, by damage to the actuator or, in the case of compressed-air-operated piston-cylinder units, by a decrease in the air pressure.
In einer bevorzugten Ausgestaltung der Erfindung sind Kolbenzylindereinheiten als Aktuatoren vorgesehen, in die die vorgenannten Federelemente integriert sind. Die Federelemente stützen sich dabei auf dem Boden des Zylinders ab, der beispielsweise durch den Gehäuseboden gebildet wird, und wirken auf den Kolben.In a preferred embodiment of the invention piston-cylinder units are provided as actuators, in which the aforementioned spring elements are integrated. The spring elements are based on the bottom of the cylinder, which is formed for example by the housing bottom, and act on the piston.
Weitere Ausführungsbeispiele der Erfindung gehen aus der gegenständlichen Beschreibung und den Ansprüchen hervor.Further embodiments of the invention will become apparent from the description and the claims.
Die einzelnen Figuren zeigen:
- Fig. 1
- Seitenansicht einer Druckmaschine
- Fig. 2
- Ansicht der offenen Seite des Regals für Sleeves
- Fig. 3
- Draufsicht auf die Druckmaschine aus
Fig. 1 - Fig. 4a, b
- Ausführungsbeispiele für Sleeves
- Fig. 5
- Seitenansicht einer weiteren erfindungsgemäßen Druckmaschine
- Fig. 6
- Wie
Fig. 5 , nur mit abgestellter Anpresswalze - Fig. 7
- Draufsicht auf eine erfindungsgemäße Druckmaschine gemäß
Fig. 5 und6 - Fig. 8
- Ansicht VIII - VIII aus
Fig. 7 - Fig. 9
- Wie
Fig. 8 , nur mit abgestellter Anpresswalze - Fig. 10
- Schnitt durch einen als Kolbenzylindereinheit ausgestaltetem Aktuator
- Fig. 1
- Side view of a printing press
- Fig. 2
- View of the open side of the shelf for sleeves
- Fig. 3
- Top view of the printing press
Fig. 1 - Fig. 4a, b
- Embodiments for sleeves
- Fig. 5
- Side view of another printing press according to the invention
- Fig. 6
- As
Fig. 5 , only with the pressure roller off - Fig. 7
- Top view of a printing press according to the invention
Fig. 5 and6 - Fig. 8
- View VIII - VIII from
Fig. 7 - Fig. 9
- As
Fig. 8 , only with the pressure roller off - Fig. 10
- Section through an actuator designed as a piston-cylinder unit
Bei der dargestellten Funktionsskizze wurden von den normalen mechanischen Komponenten einer solchen Maschine lediglich der Gegendruckzylinder 2 und die Druckzylinder D1 bis D6 dargestellt. Die anderen Komponenten sind dem Fachmann hinreichend bekannt und zum Teil ebenfalls in der Druckschrift
Die
Die Anpresswalze 4 umfasst einen Dorn 12, auf dem eine Hülse 13 aufgebracht ist, wobei die Hülse 13, nach Aufhebung einer reibschlüssigen Verbindung, in axialer Richtung des Dorns verschiebbar ist.The
Der Dorn 12 ist beidendig in geeigneten Lagern 14, beispielsweise in Kugel-oder Nadellagern, gelagert. Die Lager sind mit Schlitten verbunden, die auf gestellfesten Führungsschienen 15 linear verschiebbar sind. Die Anpresswalze 4 ist damit mit einer geradlinigen Bewegung an den Gegendruckzylinder 2 anstellbar. Alternativ hierzu können die Lager 14 auch in Schwenkarmen gelagert sein, die um einen gestellfesten Drehpunkt schwenkbar sind, so dass die Anpresswalze 4 an den Gegendruckzylinder 2 angeschwenkt werden kann, wie es anhand der
Die Schlitten können jedoch vom Lager 14 gelöst und bewegt werden, wie dies in den Figuren anhand des der Platte 10 zugeordneten Schlittens dargestellt ist. Zu diesem Zweck können die Schlitten Schalenstücke 17 umfassen, von denen ein erstes schwenkbar an einem zweiten angebracht ist, so dass das Lager 14 zwischen beiden Schalenstücken 17 eingeklemmt ist, wenn sich das erste in der angeschwenkten Position befindet. In dieser Position können die Schalenstücke aneinander fixiert sein, was sich beispielsweise mittels einer Schraubverbindung durchführen lässt. Die Schraubverbindung kann über einen Handhebel 19 hergestellt und gelöst werden. Nach dem Lösen der Fixierung und dem Wegbewegen der Schalenstücke 17 ist der Weg in axialer Richtung des Dorns 12 frei, um ungehindert die Hülse 13 abziehen zu können.However, the carriage can be released from the
Um das Wechseln der Hülse 13 zu ermöglichen, weist zumindest eine der beiden Platten 10, 11 einen fensterartigen Durchbruch 18 auf, durch welchen die Hülse von dem Dorn abgezogen werden kann. Im in der
Dem Anstellen der Anpresswalze 4 an den Gegendruckzylinder 2 dienen Aktuatoren 20, wie beispielsweise Kolben-Zylinder-Einheiten, die am Maschinengestell befestigt sind und auf die Schlitten, mit welchen die Anpresswalze bewegt wird, wirken. Jedem Ende der Anpresswalze kann ein Aktuator 20 zugeordnet sein. Ein solcher Aktuator kann vorzugsweise hydraulisch, pneumatisch oder elektromotorisch angetrieben werden.The hiring of the
Die Anstellkraft der Anpresswalze ist steuerbar, vorzugsweise regelbar. Auf diese Weise kann die Anstellkraft insbesondere an das Material der Bedruckstoffbahn angepasst werden.The contact force of the pressure roller is controllable, preferably adjustable. In this way, the adjusting force can be adapted in particular to the material of the printing material web.
Zumindest ein Aktuator kann zumindest drei vordefinierte Positionen einnehmen. Die erste davon ist die Position, in der die Anpresswalze an den Gegendruckzylinder angestellt ist, die zweite davon ist die Position, in der die Anpresswalze von Gegendruckzylinder abgestellt ist, also mit dieser nicht mehr in Kontakt steht. Bei der Bewegung in die dritte Position wird der betreffende Schlitten relativ zum Dorn bewegt, so dass die Hülse dann frei zugänglich ist, um axial abgezogen werden zu können.At least one actuator can occupy at least three predefined positions. The first of these is the position in which the pressure roller is employed on the impression cylinder, the second of which is the position in which the pressure roller is turned off by impression cylinder, that is no longer in contact with it. When moving to the third position of the relevant carriage is moved relative to the mandrel, so that the sleeve is then freely accessible to be withdrawn axially.
Die
Die
In der
In der
Die
Im Falle der Verwendung einer Kolbenzylindereinheit als Aktuator kann dieser in beide Bewegungsrichtungen mit Druckluft beaufschlagbar sein (siehe Druckluftanschlüsse in
Die
Bei der Verwendung einer Kolbenzylindereinheit kann durch das Vorsehen einer Feder, welche den Hebelarm mit einer permanenten Kraft beaufschlagt, vermieden werden, dass in Betriebspausen, in denen sich der Luftdruck innerhalb der Kolbenzylindereinheit verringert, die Anpresswalze aufgrund des fehlenden Luftdrucks und aufgrund ihrer Schwerkraft diese auf den Gegendruckzylinder fällt. Steht die Anpresswalze über längere Zeit in Kontakt mit dem Gegendruckzylinder, ohne dass beide sich drehen, besteht die Gefahr, dass die Hülse der Anpresswalze Flachstellen oder Dellen bekommt, so dass der Rundlauf und damit die ordnungsgemäße Funktion der Anpresswalze beeinträchtigt wird.When using a piston-cylinder unit, by providing a spring which applies a permanent force to the lever arm, it can be avoided that during operation pauses in which the air pressure within the piston-cylinder unit decreases, the pressure roller due to the lack of air pressure and due to its gravity the impression cylinder falls. If the pressure roller is in contact with the impression cylinder for an extended period of time without the two turning, there is the risk that the sleeve of the pressure roller will get flat or dents, so that concentricity and thus the proper functioning of the pressure roller will be impaired.
Befindet sich der Hebelarm 30 in einer Position, in der die Anpresswalze vom Gegendruckzylinder 2 abgehoben ist, und ist der Hebelarm 30 mit dem Lager 14 der Anpresswalze verbunden, so gibt es nun mehrere denkbare Möglichkeiten, um den Hebelarm 30 von dem Lager abzuschwenken, um die Hülse 13 austauschen zu können. Selbstverständlich muss zunächst die Verbindung zwischen Lager 14 und Hebelarm 30 gelöst werden. Dann kann der Hebelarm mithilfe des Aktuators weiter verschwenkt werden. Ist als Aktuator eine Kolbenzylindereinheit vorgesehen, so muss diese zumindest dreistufig sein. Diese drei Stufen müssten mit den folgenden Positionen des Hebelarms verknüpft sein:
- 1.) Anpresswalze an den Gegendruckzylinder angestellt
- 2.) Anpresswalze vom Gegendruckzylinder abgehoben
- 3.) Hebelarm vom Lager abgeschwenkt (Wechselposition für die Hülse 13)
- 1.) Anpresswalze employed on the impression cylinder
- 2) lifted off the pressure roller from the impression cylinder
- 3.) Lever arm pivoted away from the bearing (change position for the sleeve 13)
Es ist allerdings auch möglich, Hebelarm 30 und Aktuator 32 voneinander zu lösen, um den Hebelarm händisch weiter schwenken zu können. Die Trennung dieser Verbindung erfolgt etwa am Drehpunkt 33.However, it is also possible to release
Während in den
In der
Der Hebelarm 40 ist über den Zapfen 41 drehbar in der Platte 11, welche Bestandteil des Druckmaschinengestells sein kann, gelagert. Diese durch den -Zapfen 41 gebildete Dreh- bzw. Schwenkachse des Hebelarms 40 fluchtet mit der Drehachse 31 des Hebelarms 30. Der Hebelarm 40 ist mittels eines Aktuators 42 bewegbar, der über ein Drehgelenk 43 beweglich mit dem Hebelarm 40 gekoppelt ist. Der Aktuator 42 ist zudem gelenkig über das Drehgelenk 44 gelenkig mit der Platte 11 verbunden, wobei diese Verbindung im vorliegenden Ausführungsbeispiel einen Halter 45 umfasst, welcher an der Platte 11 befestigt ist. Selbstverständlich kann der Aktuator über das Drehgelenk direkt an der Platte 11 befestigt sein.The
Der Hebelarm 40 kann analog zum Hebelarm 30 mit einer Federkraft beaufschlagt sein, so dass die Anpresswalze 4 auch auf der Antriebsseite vom Gegendruckzylinder entfernt gehalten wird, wenn der Aktuator keine Kraft ausübt. Der Aktuator 42 kann analog zum Aktuator 32 ausgestaltet sein. Insbesondere kann er baugleich sein. Bevorzugt sind beide Aktuatoren 32, 42 druckluftbetriebene Kolbenzylindereinheiten.
Claims (15)
- Printing press (3) for printing of a panel (1), which (3) comprises of the following characteristics:- a central impression cylinder (2)- means for the advance of the panel (1) to the central impression cylinder (2),- a nip roll (4) for the pressing of the panel (1) to the central impression cylinder (4), and- several impression cylinders (D1...D6) actuated against the central impression cylinder (4)characterized in that
the impression cylinder (4) is composed of an arbour (12) and at least one sleeve. - Printing press (3) according to claim 1,
characterized in that
the sleeve is locked on the arbour (12) either hydraulically or pneumatically. - Printing press (3) according to one of the preceding claims,
characterized in that
the arbour (12) can be actuated against the impression cylinder (2) by means of a cylinder (D1 ...D6) which is either applied pneumatically or hydraulically. - Printing press (3) according to one of the preceding claims,
characterized in that
the actuation path of the impression cylinder (4) is straight against the nip roll (2). - Printing press (3) according to one of the preceding claims,
characterized in that
at least one shoulder of the frame of the printing press (3) is equipped with a window-like hollow through which the sleeve can be detached. - Printing press (3) according to one of the preceding claims,
characterized in that
the actuation force of the roller can be controller preferably regulated. - Printing press (3) according to one of the preceding claims,
characterized in that
the roller is brought from a actuation position to a trimmer position by a pivoting of a roll holder preferably comprising a cylinder. - Printing press according to one of the preceding claims,
characterized in that
at each end of the nip roll an actuator is provided applying a force to the nip roll which is required for the actuation to the impression cylinder. - Printing press according to the preceding claim,
characterized in that
at each end of the nip roll a spring element is provided applying a force to the nip roll which contains at least one component which is directed away from the impression cylinder. - Printing press according to the preceding claim,
characterized in that
the force applied by the spring elements is less that the maximal applicable pressing force of the actuators. - Printing press according to one of the two preceding claims,
characterized in that
the actuators are piston cylinder units whereas the spring elements support themselves on a cylinder bottom and affect the pistons. - Printing press (3) according to claim 1, with a choice of several actuating roller sleeves.
- Printing press according to the preceding claim,
characterized in that
the different sleeves do at least partly possess of rubber covers with different shore hardness. - Printing press according to one of the preceding claims,
characterized in that
the different sleeves do at least partly possess of coverings with different surface geometry. - Printing press according to one of the preceding claims,
characterized in that
the different sleeves do at least partly possess of different diameters.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102006053363 | 2006-11-10 | ||
PCT/EP2007/062152 WO2008055977A1 (en) | 2006-11-10 | 2007-11-09 | Printing machine for printing on a substrate |
Publications (2)
Publication Number | Publication Date |
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EP2091734A1 EP2091734A1 (en) | 2009-08-26 |
EP2091734B1 true EP2091734B1 (en) | 2010-02-24 |
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Application Number | Title | Priority Date | Filing Date |
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EP07822441A Active EP2091734B1 (en) | 2006-11-10 | 2007-11-09 | Printing machine for printing on a substrate |
Country Status (5)
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EP (1) | EP2091734B1 (en) |
AT (1) | ATE458609T1 (en) |
DE (1) | DE502007002964D1 (en) |
ES (1) | ES2340438T3 (en) |
WO (1) | WO2008055977A1 (en) |
Cited By (1)
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WO2014183913A1 (en) * | 2013-05-13 | 2014-11-20 | Eltromat Gmbh | Ink measuring device, in particular for printing machines |
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WO2011151487A1 (en) * | 2010-06-01 | 2011-12-08 | Comexi Group Industries, S.A.U | Device for installing and removing an insertion roller for a flexographic machine |
CN114953720B (en) * | 2022-05-10 | 2024-01-05 | 江苏凯欣达纺织品有限公司 | Knurling equipment for composite material woven cloth |
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Publication number | Priority date | Publication date | Assignee | Title |
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US3041966A (en) * | 1959-09-24 | 1962-07-03 | Hoe & Co R | Multicolor web offset press |
AT221467B (en) * | 1960-11-21 | 1962-05-25 | Ver Faerbereien Aktien Ges | Roller printing machine, in particular for textile printing |
IT1203476B (en) * | 1987-04-15 | 1989-02-15 | Componenti Grafici Srl | IMPROVEMENTS IN FLEXIBLE ROLLERS FOR ROTARY MACHINES |
US6745688B1 (en) * | 1998-03-31 | 2004-06-08 | Heidelberger Druckmaschinen Ag | Lithographic web-fed rotary printing press |
-
2007
- 2007-11-09 AT AT07822441T patent/ATE458609T1/en active
- 2007-11-09 WO PCT/EP2007/062152 patent/WO2008055977A1/en active Application Filing
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WO2014183913A1 (en) * | 2013-05-13 | 2014-11-20 | Eltromat Gmbh | Ink measuring device, in particular for printing machines |
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ATE458609T1 (en) | 2010-03-15 |
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