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EP1531046B1 - Cylindrical carrier for receiving an exchangeable printing sleeve and method for its manufacturing - Google Patents

Cylindrical carrier for receiving an exchangeable printing sleeve and method for its manufacturing Download PDF

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Publication number
EP1531046B1
EP1531046B1 EP04026661A EP04026661A EP1531046B1 EP 1531046 B1 EP1531046 B1 EP 1531046B1 EP 04026661 A EP04026661 A EP 04026661A EP 04026661 A EP04026661 A EP 04026661A EP 1531046 B1 EP1531046 B1 EP 1531046B1
Authority
EP
European Patent Office
Prior art keywords
carrier
pressure
core
jacket
pressure medium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP04026661A
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German (de)
French (fr)
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EP1531046A1 (en
Inventor
Hans-Georg Schepers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schepers GmbH and Co KG
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Schepers GmbH and Co KG
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Filing date
Publication date
Application filed by Schepers GmbH and Co KG filed Critical Schepers GmbH and Co KG
Priority to PL04026661T priority Critical patent/PL1531046T3/en
Publication of EP1531046A1 publication Critical patent/EP1531046A1/en
Application granted granted Critical
Publication of EP1531046B1 publication Critical patent/EP1531046B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F27/00Devices for attaching printing elements or formes to supports
    • B41F27/10Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders
    • B41F27/105Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders for attaching cylindrical printing formes

Definitions

  • the present invention relates to a cylindrical carrier for receiving a replaceable by axial sliding and peeling hollow cylindrical pressure sleeve and a method for producing the carrier.
  • Carrier and printing sleeves of the type mentioned are known from practical use in the printing industry. It has been customary to make the pushing and removing the replaceable printing sleeves using a compressed air cushion.
  • the carrier has on its outer circumference a number of small holes which are fed from the interior of the carrier ago with compressed air.
  • the supplied compressed air forms when pushing or pulling the pressure sleeve, an air cushion between the outer periphery of the carrier and the inner circumference of the pressure sleeve.
  • the pushing or pulling can be done with a small force, because the compressed air cushion ensures a small, but sufficiently large expansion of the inner diameter of the pressure sleeve.
  • nickel sleeves are used here whose wall thickness is at most about 0.3 to 0.5 mm. This is very limited in the use and in the selection of printing sleeves.
  • such thin pressure sleeves are very sensitive to mechanical damage.
  • a carrier according to the preamble of claim 1 is in EP-A-0 736 382 or US-A-4,934,266 disclosed.
  • the task of creating a support of the type mentioned above which offers a greater freedom of choice with respect to the aufziehbaren pressure sleeves on this and can be combined with more stable and therefore insensitive sleeves.
  • a change of the printing sleeve should be possible both inside and outside a printing press.
  • a good concentricity of the printing cylinder-forming unit of carrier and sleeve should be ensured and a mutual rotation of the carrier and sleeve can be excluded in the printing operation.
  • a method for producing a suitable carrier is to be created.
  • the carrier the component whose outer diameter is changeable for the purpose of pushing on and off of printing sleeves.
  • the pressure sleeves which are to be used together with the carrier, need not be changeable in their inner diameter. This is advantageously achieved that pressure sleeves with a greater wall thickness and in particular with different wall thicknesses can be combined with a carrier.
  • a relatively large range of printing lengths that is to say, of printing sleeve outer circumferences, can be covered.
  • This offers the advantage for printers that they manage with a relatively small number of carriers, even if they use printing sleeves with many different print lengths, so outer peripheral lengths. The necessary investments for carriers can be greatly reduced in this way.
  • the different print lengths are then simply by correspondingly different thicknesses the sleeves at a few predetermined inner diameters, according to the existing carriers implemented.
  • the carrier according to the invention is at least as comfortable as the previously known carrier with compressed air cushion, so that in this respect no compromises must be made.
  • a mutual rotation of the carrier and pressure sleeve is securely excluded by the frictional engagement between the expanded carrier shell and the pressure sleeve, so that in this respect no problems in the operation of a printing press are to be feared.
  • the carrier jacket is connected between the two front ends along a plurality of circumferentially extending connecting lines with the carrier core, wherein the gap space is formed by a plurality of interconnected in the pressure medium permeable connection part-gap spaces.
  • the partial gap spaces are formed by running in the circumferential direction of the carrier core recesses, which are bounded by outwardly projecting, extending in the circumferential direction of the carrier core webs.
  • the carrier core and the carrier shell made of steel or aluminum and by Welds are connected together.
  • the embodiment of the carrier according to the invention provides that the carrier coat is provided on its outer circumference with an elastic coating.
  • This elastic coating on the outer circumference of the carrier shell provides for an increased frictional engagement between the outer periphery of the coating and the inner circumference of the pressure sleeve and for an improved compensation of deviations of the outer peripheral surface of the carrier from an ideal cylindrical shape. This ensures that deviations of the outer shape of the carrier shell from the cylindrical shape do not affect the outer peripheral surface of the pressure sleeve; Rather, the outer peripheral surface of the pressure sleeve remains completely cylindrical, even if the outer peripheral surface of the support jacket is not a perfect cylinder jacket surface. This ensures a high-quality print result.
  • the elastic coating is formed by a rubber coating or by a support made of polyurethane or silicone rubber.
  • the coatings mentioned provide the desired increased frictional engagement and, on the other hand, the desired balance of form, the materials being both sufficiently wear-resistant and durable and not requiring much effort for their processing.
  • the carrier is not too heavy, is further preferably provided that the carrier core is hollow cylindrical and at its end faces each have an inserted Stirnend Giant, each with a Lagerachsstummel and that at least one Stirnend schizophrenia a channel for Zuund / or discharge of the pressure medium is performed.
  • the channel or channels run concentrically through the Lagerachsstummel, whereby an imbalance is avoided even in a channel guide through the Lagerachsstummel.
  • a device for generating and / or changing the pressure of the pressure medium can be arranged in the carrier core, wherein the device can be actuated or switched from outside the carrier core.
  • This embodiment of the carrier offers the particular advantage that it requires no external devices for the generation, supply and discharge of pressure medium. Rather, all the means required for changing the pressure of the pressure medium in the gap space are integrated into the carrier. This makes the use of the carrier possible regardless of whether or not a suitable printing medium source is present in a printing operation.
  • the device is preferably a piston-cylinder arrangement accommodated in a front-end end piece or bearing stub axle of the carrier core.
  • This arrangement is designed so that by moving the piston of the piston-cylinder assembly in the gap a selectable pressure of the pressure medium can be adjusted without having to be fed or discharged from the outside pressure medium.
  • the piston is preferably displaceable by an adjusting tool that can be fed from the outside or by an adjusting device that can be shifted from the outside.
  • a feed opening suitable for this purpose is expediently formed concentrically with the relevant bearing stub axle or front end piece of the carrier core, in order to maintain a rotationally symmetrical structure of the carrier.
  • the pressure medium may be a gas, preferably air, or a liquid, preferably oil, or a viscous mass, preferably lubricating grease.
  • the method provides that a carrier core and a radially surrounding outer support jacket to form a loadable with a pressure medium gap space between the outer periphery of the carrier core and the inner circumference of the carrier shell are at least the front end sealed together and that is then processed at a pressure p1 of the pressure medium in the gap of the carrier jacket on its outer peripheral surface to a cylindrical shape, after which the carrier jacket at a pressure p0, which is smaller than the pressure p1, a radially inwardly deviating from the cylindrical shape, a low-force pushing and withdrawing a pressure sleeve gestattende form assumes its outer peripheral surface and at a pressure p2, which is higher than the pressure p1, an expanded, partially or fully against the inner periphery of a deferred pressure sleeve frictionally fitting shape of its outer peripheral surface assumes.
  • the carrier coat is processed at a pressure p1 of the pressure medium in the gap to a cylindrical shape, it is ensured that at the lower pressure p0 the outer circumference of the carrier shell due to the inherent elasticity occupies a radially inwardly deviating from the ideal cylindrical shape.
  • the support jacket is at least over the largest part of its outer peripheral surface in diameter smaller than the inner diameter of an associated pressure sleeve.
  • the further pressure increase no longer ensures a further expansion of the outer circumference of the carrier, but only for an increase in the contact pressure of the outer circumference of the carrier to the inner circumference of the sleeve, since the sleeve is not variable here in terms of their inner diameter.
  • the pressure p2 is suitably determined by tests and selected so high that a sufficiently secure frictional engagement between the carrier and the pressure sleeve is guaran teed, the mutual rotations during operation safely excludes the pressure cylinder formed by the carrier and printing sleeve in a printing press.
  • the pressure p0 may be, for example, the atmospheric air pressure or ambient pressure, whereby the generation of a vacuum, which would be associated with greater technical complexity, is not required.
  • the reduction of the outer diameter of the carrier is due to the elastic properties of the carrier shell without further aids, so that a total of a very simple, yet reliable construction without any joints or other wearing elements is achieved.
  • Figure 1 of the drawing shows partly in view, partly in a sectional view of a carrier 1, which carries a pressure sleeve 2, wherein the unit of carrier 1 and pressure sleeve 2 forms a pressure cylinder.
  • the carrier 1 consists of a hollow-cylindrical in its basic form carrier core 10, which is surrounded on the outside, leaving a gap 11 by a likewise hollow cylindrical carrier shell 12.
  • the carrier core 10 and the carrier shell 12 are sealed together. As a result, a closed gap 11 is formed.
  • the parts 10, 12 and 15 of the carrier 1 are made of metal, in particular steel or aluminum, which ensures the necessary stability and allows easy welding joints.
  • Lagerachsstummel 15 'and the associated front end 15 extends axially from the outside coming a bore 16 axially and concentrically toward the interior of the carrier 1, but ends before the hollow interior of the carrier 1 at a distance in front of the axially inner end face of the front end 15. From the inner end of the bore 16 extends a bore 16 'in the radial direction outwards into the gap space eleventh
  • a piston-cylinder unit 17 is housed in the axially inner end region of the bore 16.
  • This piston-cylinder unit 17 has an adjustable piston with which the pressure of a in the gap 11 and in the bore 16 'located pressure medium can be changed.
  • an adjusting screw 17 ' is provided, which in a not specifically shown Thread within the bore 16 is guided.
  • FIG. 2 shows a detail of the structure of the carrier 1 near its left end in FIG. At the lower left in FIG. 2, a part of the front end piece 15 with the bore 16 'running radially therein can be seen. The front end 15 is inserted rotationally in the hollow cylindrical carrier core 10.
  • the carrier core 10 has on its outer circumference a series of circumferential recesses in the circumferential direction, which are separated by circumferential ridges 13 from each other. In this way, a gap space 11 is formed, which is formed by a series of axially adjacent, separated by the webs 13 part-gap spaces 11 '.
  • the partial gap spaces 11 ' are mutually in a permeable to the pressure medium therein communication.
  • the support jacket 12 is connected along frontally and circumferentially extending welds 14, 14' tightly and firmly connected to the carrier core 10 ,
  • the carrier core 10 has a significantly higher material thickness than the carrier shell 12.
  • the carrier shell 12 has a smaller material thickness, which is dimensioned such that, in the case of a change the pressure of the pressure medium in the gap space 11 or in the partial gap spaces 11 'can cause a deformation of the outer peripheral surface 12' of the carrier shell 12.
  • the outer peripheral surface 12 'of the carrier shell 12 has a shape that deviates radially inwardly at least over partial areas from an ideal cylindrical shape. In this state of the carrier shell 12, the pressure sleeve 2 can be withdrawn with little effort in the axial direction of the carrier 1 or pushed onto the carrier 1.
  • the pressure sleeve 2 here has a relatively large thickness, which ensures that the pressure sleeve 2 has a fixed inner and outer diameter, which is not enlarged by forces exerted from the inside.
  • a secure frictional engagement between the outer peripheral surface 12 'of the support shell 12 and the inner peripheral surface 21 of the pressure sleeve 2 is effected, so that mutual rotations between the carrier 1 and the pressure sleeve 2 when used in a printing press can not occur.
  • the Carrier shell 12 With a reduction of the pressure of the pressure medium in the gap space 11 to the low pressure p0, the Carrier shell 12 due to its inherent elasticity back to a shape that has a smaller outer diameter, which then pulling off the pressure sleeve 2 and pushing on another pressure sleeve 2 is possible easily and with little effort.
  • the carrier corresponds in many parts to the carrier 1 according to FIG. 1 and FIG.
  • a rubber coating 18 on the outer peripheral surface 12 'of the carrier shell 12 is attached.
  • This rubber coating 18 has the purpose, on the one hand to achieve an improved frictional engagement between the outer peripheral surface of the rubber coating 18 and the inner peripheral surface 21 of the pressure sleeve 2 and on the other to provide a surface shape compensation, in the event that the outer peripheral surface 12 'of the support jacket 12 in its expanded Condition has a deviating from an ideal cylindrical shape surface shape.
  • These deviations in shape are then compensated by the rubber coating 18 or a similar elastic coating, so that there is no risk that shape deviations of the outer peripheral surface 12 'of the support shell 12 can propagate to the outer peripheral surface 20 of the pressure sleeve 2.
  • an absolutely cylindrical surface shape of the outer peripheral surface 20 of the printing sleeve 2 and thus a good printing result with high quality are guaranteed in each case.
  • the carrier 1 and the pressure sleeve 2 correspond to the exemplary embodiment according to FIGS. 1 and 2.
  • the carrier core 10 is provided with the Stirnend Partnersen 15 and the Lagerachsstummeln 15 '. If necessary, then the machining of the outer peripheral surface of the carrier core 10 to form the gap space 11 and the partial gap spaces 11 'can then take place. Subsequently, the carrier jacket 12 is pushed onto the carrier core 10 and then welded tightly to the carrier core 10 along the welds 14, 14 '(see FIG. 2 and FIG. 4).
  • the gap space 11 ' is filled with pressure medium under a pressure p1, wherein the pressure p1 is greater than the above-mentioned pressure p0 and smaller than the pressure p2 also mentioned above.
  • the carrier jacket 12 Due to the pressure p1, the carrier jacket 12, which is exposed to the outside in this processing step and in particular is not surrounded by a pressure sleeve 2, is expanded to a certain extent.
  • the support jacket 12 is machined on its outer circumferential surface 12 'to an exactly cylindrical shape, e.g. by a turning and / or grinding process.
  • the carrier shell 12 returns due to its own restoring force, whereby its outer peripheral surface 12 'assumes a surface shape which deviates radially inwardly from the previously assumed cylindrical shape , At least over most of the outer peripheral surface 12 'thus the diameter of the carrier 1 is reduced and the pressure sleeve 2 can be pushed with little effort in this state on the carrier 1 or withdrawn from the carrier 1 for the purpose of a sleeve change.

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  • Printing Plates And Materials Therefor (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)

Abstract

The cylindrical carrier (1) for a printing cylinder (2) at a printing press, where the cylinder is exchanged by sliding on and off the carrier, has an inner core (10) and a carrier mantle (12) around it. The mantle is sealed at the core at least at the end sides, leaving a space (11) between the mantle and core which can be filled with compressed air from a piston/cylinder unit (17,17'). On a zero pressure, the mantle contracts radially inwards over at least a part of its length, to allow the printing cylinder to be pushed over it and, when the pressure is increased, the mantle expands to hold the printing cylinder with a friction lock. The mantle has an outer elastic cladding of a rubber-type material.

Description

Die vorliegende Erfindung betrifft einen zylindrischen Träger für die Aufnahme einer durch axiales Aufschieben und Abziehen auswechselbaren hohlzylindrischen Druckhülse sowie ein Verfahren zur Herstellung des Trägers.The present invention relates to a cylindrical carrier for receiving a replaceable by axial sliding and peeling hollow cylindrical pressure sleeve and a method for producing the carrier.

Träger und Druckhülsen der eingangs genannten Art sind aus der praktischen Anwendung in der Druckindustrie bekannt. Dabei ist es bisher üblich, das Aufschieben und Abziehen der auswechselbaren Druckhülsen mit Hilfe eines Druckluftpolsters vorzunehmen. Hierzu besitzt der Träger an seinem Außenumfang eine Anzahl von kleinen Bohrungen, die vom Inneren des Trägers her mit Druckluft beschickbar sind. Die zugeführte Druckluft bildet beim Aufschieben oder Abziehen der Druckhülse ein Luftpolster zwischen dem Außenumfang des Trägers und dem Innenumfang der Druckhülse. Dadurch kann das Aufschieben oder Abziehen mit einem geringen Kraftaufwand erfolgen, weil das Druckluftpolster für eine geringfügige, aber ausreichend große Aufweitung des Innendurchmessers der Druckhülse sorgt. Wenn die Zuführung von Druckluft beendet wird, verschwindet das Luftpolster zwischen Träger und Druckhülse und die Druckhülse legt sich unter Verkleinerung ihres Innendurchmessers reibschlüssig an den Außenumfang des Trägers an, so daß dann ein einsatzbereiter Druckzylinder vorliegt.Carrier and printing sleeves of the type mentioned are known from practical use in the printing industry. It has been customary to make the pushing and removing the replaceable printing sleeves using a compressed air cushion. For this purpose, the carrier has on its outer circumference a number of small holes which are fed from the interior of the carrier ago with compressed air. The supplied compressed air forms when pushing or pulling the pressure sleeve, an air cushion between the outer periphery of the carrier and the inner circumference of the pressure sleeve. As a result, the pushing or pulling can be done with a small force, because the compressed air cushion ensures a small, but sufficiently large expansion of the inner diameter of the pressure sleeve. When the supply of compressed air is stopped, the air cushion disappears between the carrier and pressure sleeve and the pressure sleeve settles with reduction of its inner diameter frictionally against the outer circumference of the carrier, so that then there is a ready-to-use pressure cylinder.

Als nachteilig ist bei diesem Stand der Technik anzusehen, daß die auf dem bekannten Träger einsetzbaren Druckhülsen nur eine sehr geringe Dicke aufweisen dürfen, um das erforderliche Aufweiten mittels des Druckluftpolsters in ausreichendem Umfang erreichen zu können. In der Praxis werden hier Nickelhülsen eingesetzt, deren Wandstärke maximal etwa 0,3 bis 0,5 mm beträgt. Damit ist man beim Einsatz und bei der Auswahl von Druckhülsen sehr stark eingeschränkt. Außerdem sind derart dünne Druckhülsen sehr empfindlich gegen mechanische Beschädigungen.A disadvantage is to be regarded in this prior art that the usable on the known carrier printing sleeves may only have a very small thickness in order to achieve the required expansion by means of the compressed air cushion in a sufficient extent. In practice, nickel sleeves are used here whose wall thickness is at most about 0.3 to 0.5 mm. This is very limited in the use and in the selection of printing sleeves. In addition, such thin pressure sleeves are very sensitive to mechanical damage.

Ein Träger gemäß dem Oberbegriff des Anspruchs 1 ist in EP-A-0 736 382 oder US-A-4 934 266 offenbart.A carrier according to the preamble of claim 1 is in EP-A-0 736 382 or US-A-4,934,266 disclosed.

Für die vorliegende Erfindung stellt sich deshalb die Aufgabe, einen Träger der eingangs genannten Art zu schaffen, der hinsichtlich der auf diesen aufziehbaren Druckhülsen eine größere Wahlfreiheit bietet und der mit stabileren und damit unempfindlichen Hülsen kombinierbar ist. Gleichzeitig soll das Aufschieben und Abziehen der Druckhülse auf den Träger bzw. vom Träger mit geringen Kräften und damit schonend insbesondere für die Druckhülse möglich bleiben. Weiterhin soll ein Wechsel der Druckhülse sowohl innerhalb als auch außerhalb einer Druckmaschine möglich sein. Schließlich soll ein guter Rundlauf der den Druckzylinder bildenden Einheit aus Träger und Hülse gewährleistet sein und eine gegenseitige Verdrehung von Träger und Hülse im Druckbetrieb ausgeschlossen sein. Außerdem soll ein Verfahren zur Herstellung eines geeigneten Trägers geschaffen werden.For the present invention, therefore, the task of creating a support of the type mentioned above, which offers a greater freedom of choice with respect to the aufziehbaren pressure sleeves on this and can be combined with more stable and therefore insensitive sleeves. At the same time the pushing and pulling the pressure sleeve to the carrier or from the carrier with low forces and thus gently remain possible in particular for the pressure sleeve. Furthermore, a change of the printing sleeve should be possible both inside and outside a printing press. Finally, a good concentricity of the printing cylinder-forming unit of carrier and sleeve should be ensured and a mutual rotation of the carrier and sleeve can be excluded in the printing operation. In addition, a method for producing a suitable carrier is to be created.

Die Lösung des den Träger betreffenden Teils dieser Aufgabe gelingt erfindungsgemäß mit einem Träger gemäß Anspruch 1.The solution of the carrier-related part of this object succeeds according to the invention with a carrier according to claim 1.

Erfindungswesentlich ist hier der Träger das Bauteil, dessen Außendurchmesser zum Zweck des Aufschiebens und Abziehens von Druckhülsen veränderbar ist. Die Druckhülsen, die zusammen mit dem Träger verwendet werden sollen, brauchen in Ihrem Innendurchmesser nicht veränderbar zu sein. Damit wird vorteilhaft erreicht, daß auch Druckhülsen mit einer größeren Wandstärke und insbesondere mit unterschiedlichen Wandstärken mit einem Träger kombiniert werden können. Damit kann mit einem einzelnen Träger ein relativ großer Bereich von Drucklängen, das heißt von Druckhülsen-Außenumfängen, abgedeckt werden. Dies bietet für Druckereien den Vorteil, daß sie mit einer relativ geringen Anzahl von Trägern auskommen, auch wenn sie Druckhülsen mit vielen verschiedenen Drucklängen, also Außenumfangslängen, einsetzen. Die erforderlichen Investitionen für Träger können auf diese Weise stark reduziert werden. Die unterschiedlichen Drucklängen werden dann einfach durch entsprechend unterschiedliche Dicken der Hülsen bei wenigen vorgegebenen Innendurchmessern, entsprechend den vorhandenen Trägern, realisiert. In der Handhabung ist der erfindungsgemäße Träger mindestens ebenso komfortabel wie die bisher bekannten Träger mit Druckluftpolster, so daß in dieser Beziehung keinerlei Abstriche gemacht werden müssen. Zudem ist es problemlos möglich, den Träger vollkommen rotationssymmetrisch aufzubauen, so daß auch ein guter Rundlauf des Trägers für sich und der Kombination aus Träger und Druckhülse gewährleistet ist. Eine gegenseitige Verdrehung von Träger und Druckhülse wird durch den Reibschluß zwischen dem expandierten Trägermantel und der Druckhülse sicher ausgeschlossen, so daß auch in dieser Hinsicht keine Probleme im Betrieb einer Druckmaschine zu befürchten sind.Essential to the invention here is the carrier, the component whose outer diameter is changeable for the purpose of pushing on and off of printing sleeves. The pressure sleeves, which are to be used together with the carrier, need not be changeable in their inner diameter. This is advantageously achieved that pressure sleeves with a greater wall thickness and in particular with different wall thicknesses can be combined with a carrier. Thus, with a single carrier, a relatively large range of printing lengths, that is to say, of printing sleeve outer circumferences, can be covered. This offers the advantage for printers that they manage with a relatively small number of carriers, even if they use printing sleeves with many different print lengths, so outer peripheral lengths. The necessary investments for carriers can be greatly reduced in this way. The different print lengths are then simply by correspondingly different thicknesses the sleeves at a few predetermined inner diameters, according to the existing carriers implemented. In handling the carrier according to the invention is at least as comfortable as the previously known carrier with compressed air cushion, so that in this respect no compromises must be made. In addition, it is easily possible to construct the carrier completely rotationally symmetrical, so that a good concentricity of the carrier is guaranteed for themselves and the combination of carrier and pressure sleeve. A mutual rotation of the carrier and pressure sleeve is securely excluded by the frictional engagement between the expanded carrier shell and the pressure sleeve, so that in this respect no problems in the operation of a printing press are to be feared.

In einer bevorzugten Weiterbildung des Trägers ist vorgesehen, daß der Trägermantel zwischen den beiden Stirnenden entlang von mehreren in Umfangsrichtung verlaufenden Verbindungslinien mit dem Trägerkern verbunden ist, wobei der Spaltraum durch mehrere untereinander in für das Druckmedium durchlässiger Verbindung stehende Teil-Spalträume gebildet ist. Mit dieser Unterteilung des Spaltraums in mehrere Teil-Spalträume wird insbesondere eine höhere Formstabilität und eine höhere Belastbarkeit des Trägers erreicht, ohne daß die gewünschte Funktion eingeschränkt wird.In a preferred development of the carrier it is provided that the carrier jacket is connected between the two front ends along a plurality of circumferentially extending connecting lines with the carrier core, wherein the gap space is formed by a plurality of interconnected in the pressure medium permeable connection part-gap spaces. With this subdivision of the gap space into a plurality of partial gap spaces in particular a higher dimensional stability and a higher load capacity of the carrier is achieved without the desired function is limited.

Weiter ist bevorzugt vorgesehen, daß die Teil-Spalträume durch in Umfangsrichtung des Trägerkerns verlaufende Eintiefungen gebildet sind, die von nach außen vorstehenden, in Umfangsrichtung des Trägerkerns verlaufenden Stegen begrenzt sind. Diese Ausgestaltung bietet insbesondere den Vorteil, daß der Träger in Umfangsrichtung vollkommen rotationssymetrisch bleibt, so daß keine Unwuchten entstehen können.Further, it is preferably provided that the partial gap spaces are formed by running in the circumferential direction of the carrier core recesses, which are bounded by outwardly projecting, extending in the circumferential direction of the carrier core webs. This embodiment has the particular advantage that the carrier remains completely rotationally symmetrical in the circumferential direction, so that no imbalance can arise.

Um auf der einen Seite eine ausreichende Stabilität und Formbeständigkeit des Trägers zu erzielen und um auf der anderen Seite für den Träger möglichst kostengünstiges und leicht verarbeitbares Material einsetzen zu können, ist bevorzugt vorgesehen, daß der Trägerkern und der Trägermantel aus Stahl oder Aluminium bestehen und durch Schweißnähte miteinander verbunden sind.In order to achieve on the one hand a sufficient stability and dimensional stability of the carrier and to use on the other hand for the carrier most cost-effective and easily processable material, it is preferably provided that the carrier core and the carrier shell made of steel or aluminum and by Welds are connected together.

Die Ausgestaltung des erfindungsgemäßen Trägers sieht vor, daß der Trägermantel auf seinem Außenumfang mit einer elastischen Beschichtung versehen ist. Diese elastische Beschichtung auf dem Außenumfang des Trägermantel sorgt zum einen für einen erhöhten Reibschluß zwischen dem Außenumfang der Beschichtung und dem Innenumfang der Druckhülse und zum anderen für einen verbesserten Ausgleich von Abweichungen der äußeren Umfangsfläche des Trägers von einer idealen Zylinderform. Damit wird gewährleistet, daß Abweichungen der äußeren Form des Trägermantels von der Zylinderform sich nicht bis auf die äußere Umfangsfläche der Druckhülse auswirken; vielmehr bleibt die äußere Umfangsfläche der Druckhülse vollkommen zylindrisch, auch wenn die Außenumfangsfläche des Trägermantels keine vollkommene Zylindermantelfläche ist. Hierdurch wird ein qualitativ hochwertiges Druckergebnis gewährleistet.The embodiment of the carrier according to the invention provides that the carrier coat is provided on its outer circumference with an elastic coating. This elastic coating on the outer circumference of the carrier shell provides for an increased frictional engagement between the outer periphery of the coating and the inner circumference of the pressure sleeve and for an improved compensation of deviations of the outer peripheral surface of the carrier from an ideal cylindrical shape. This ensures that deviations of the outer shape of the carrier shell from the cylindrical shape do not affect the outer peripheral surface of the pressure sleeve; Rather, the outer peripheral surface of the pressure sleeve remains completely cylindrical, even if the outer peripheral surface of the support jacket is not a perfect cylinder jacket surface. This ensures a high-quality print result.

Bevorzugt wird weiter vorgeschlagen, daß die elastische Beschichtung durch eine Gummierung oder durch eine Auflage aus Polyurethan- oder Silikonkautschuk gebildet ist. Die genannten Beschichtungen bieten einerseits den gewünschten verstärkten Reibschluß und andererseits den gewünschten Formausgleich, wobei die Materialien sowohl ausreichend verschleißfest und haltbar sind als auch für ihre Verarbeitung keinen zu großen Aufwand erfordern.Preferably, it is further proposed that the elastic coating is formed by a rubber coating or by a support made of polyurethane or silicone rubber. On the one hand, the coatings mentioned provide the desired increased frictional engagement and, on the other hand, the desired balance of form, the materials being both sufficiently wear-resistant and durable and not requiring much effort for their processing.

Damit der Träger nicht zu schwer wird, ist weiterhin bevorzugt vorgesehen, daß der Trägerkern hohlzylindrisch ist und an seinen Stirnseiten je ein eingesetztes Stirnendstück mit je einem Lagerachsstummel aufweist und daß durch zumindest ein Stirnendstück ein Kanal für die Zuund/oder Abführung des Druckmediums geführt ist. Bevorzugt verlaufen dabei der Kanal oder die Kanäle konzentrisch durch die Lagerachsstummel, wodurch eine Unwucht auch bei einer Kanalführung durch die Lagerachsstummel vermieden wird. Gleichzeitig besteht so die Möglichkeit, Druckmedium auch in einem in eine Druckmaschine eingebauten Zustand von Träger und Druckhülse zuzuführen oder abzulassen, was den Wechsel einer Druckhülse auch in einem in eine Druckmaschine eingebauten Zustand des Trägers erlaubt.Thus, the carrier is not too heavy, is further preferably provided that the carrier core is hollow cylindrical and at its end faces each have an inserted Stirnendstück, each with a Lagerachsstummel and that at least one Stirnendstück a channel for Zuund / or discharge of the pressure medium is performed. Preferably, the channel or channels run concentrically through the Lagerachsstummel, whereby an imbalance is avoided even in a channel guide through the Lagerachsstummel. At the same time there is the possibility to supply pressure medium even in a built-in a printing machine state of the carrier and pressure sleeve or release, which allows the change of a printing sleeve in a built-in a printing machine state of the carrier.

Weiterhin kann erfindungsgemäß im Trägerkern eine Einrichtung zur Erzeugung und/oder Veränderung des Drucks des Druckmediums angeordnet sein, wobei die Einrichtung von außerhalb dem Trägerker betätigbar oder schaltbar ist. Diese Ausgestaltung des Trägers bietet insbesondere den Vorteil, daß er keine externen Einrichtungen für die Erzeugung, Zuführung und Abführung von Druckmedium benötigt. Vielmehr sind alle für die Veränderung des Drucks des Druckmediums im Spaltraum benötigten Mittel in den Träger integriert. Dies macht dem Einsatz des Trägers unabhängig davon möglich, ob in einem Druckereibetrieb eine geeignete Druckmediumquelle vorhanden ist oder nicht.Furthermore, according to the invention, a device for generating and / or changing the pressure of the pressure medium can be arranged in the carrier core, wherein the device can be actuated or switched from outside the carrier core. This embodiment of the carrier offers the particular advantage that it requires no external devices for the generation, supply and discharge of pressure medium. Rather, all the means required for changing the pressure of the pressure medium in the gap space are integrated into the carrier. This makes the use of the carrier possible regardless of whether or not a suitable printing medium source is present in a printing operation.

Bevorzugt ist dabei die Einrichtung eine in einem stirnendseitigen Stirnendstück oder Lagerachsstummel des Trägerkerns untergebrachte Kolben-Zylinder-Anordnung. Diese Anordnung ist so gestaltet, daß durch Verschieben des Kolbens der Kolben-Zylinder-Anordnung in dem Spaltraum ein auswählbarer Druck des Druckmediums eingestellt werden kann, ohne daß von außen Druckmedium zugeführt oder abgeführt werden muß.In this case, the device is preferably a piston-cylinder arrangement accommodated in a front-end end piece or bearing stub axle of the carrier core. This arrangement is designed so that by moving the piston of the piston-cylinder assembly in the gap a selectable pressure of the pressure medium can be adjusted without having to be fed or discharged from the outside pressure medium.

In weiterer Ausgestaltung ist bevorzugt der Kolben durch ein von außen zuführbares Verstellwerkzeug oder durch eine von außen schaltbare Verstellvorrichtung verschiebbar. Bei Ausführung mit einem von außen zuführbaren Verstellwerkzeug wird eine dafür geeignete Zuführöffnung zweckmäßig konzentrisch zu dem betreffenden Lagerachsstummel oder Stirnendstück des Trägerkerns ausgebildet, um einen rotationssymetrischen Aufbau des Trägers beizubehalten.In a further embodiment, the piston is preferably displaceable by an adjusting tool that can be fed from the outside or by an adjusting device that can be shifted from the outside. In the case of a design with an adjustment tool that can be supplied from the outside, a feed opening suitable for this purpose is expediently formed concentrically with the relevant bearing stub axle or front end piece of the carrier core, in order to maintain a rotationally symmetrical structure of the carrier.

Hinsichtlich des in dem Träger verwendeten Druckmediums besteht eine große Wahlfreiheit. Das Druckmedium kann ein Gas, vorzugsweise Luft, oder eine Flüssigkeit, vorzugsweise Öl, oder eine viskose Masse, vorzugsweise Schmierfett, sein. Mit allen Druckmedien kann der gewünschte Effekt, nämlich das wahlweise Vergrößern oder Verkleinern des Außendurchmessers des Trägers durch Einstellung von unterschiedlichen Drücken des Druckmediums erreicht werden.With regard to the printing medium used in the carrier, there is a great freedom of choice. The pressure medium may be a gas, preferably air, or a liquid, preferably oil, or a viscous mass, preferably lubricating grease. With all print media, the desired effect, namely the optional enlargement or reduction of the outer diameter of the carrier can be achieved by setting different pressures of the print medium.

Die Lösung des Teils der Aufgabe, der sich mit einem Verfahren zur Herstellung des Trägers befaßt, gelingt erfindungsgemäß mit einem Verfahren mit den im Patentanspruch 12 angegebenen Merkmalen. Gemäß diesem Patentanspruch sieht das Verfahren vor,
daß ein Trägerkern und ein diesen radial außen umgebender Trägermantel unter Ausbildung eines mit einem Druckmedium beschickbaren Spaltraums zwischen dem Außenumfang des Trägerkerns und dem Innenumfang des Trägermantels zumindest stirnendseitig dicht miteinander verbunden werden und
daß danach bei einem Druck p1 des Druckmediums im Spaltraum der Trägermantel auf seiner Außenumfangsfläche zu einer Zylinderform bearbeitet wird, wonach der Trägermantel bei einem Druck p0, der kleiner als der Druck p1 ist, eine von der Zylinderform radial nach innen hin abweichende, ein kräftearmes Aufschieben und Abziehen einer Druckhülse gestattende Form seiner Außenumfangsfläche annimmt und bei einem Druck p2, der höher ist als der Druck p1, eine expandierte, teil- oder vollflächig gegen den Innenumfang einer aufgeschobenen Druckhülse reibschlüssig anliegende Form seiner Außenumfangsfläche annimmt.
The solution of the part of the problem, which deals with a method for producing the carrier, according to the invention succeeds with a method having the features specified in claim 12. According to this claim, the method provides
that a carrier core and a radially surrounding outer support jacket to form a loadable with a pressure medium gap space between the outer periphery of the carrier core and the inner circumference of the carrier shell are at least the front end sealed together and
that is then processed at a pressure p1 of the pressure medium in the gap of the carrier jacket on its outer peripheral surface to a cylindrical shape, after which the carrier jacket at a pressure p0, which is smaller than the pressure p1, a radially inwardly deviating from the cylindrical shape, a low-force pushing and withdrawing a pressure sleeve gestattende form assumes its outer peripheral surface and at a pressure p2, which is higher than the pressure p1, an expanded, partially or fully against the inner periphery of a deferred pressure sleeve frictionally fitting shape of its outer peripheral surface assumes.

Dadurch, daß der Trägermantel bei einem Druck p1 des Druckmediums im Spaltraum zu einer Zylinderform bearbeitet wird, wird sichergestellt, daß bei dem niedrigeren Druck p0 der Außenumfang des Trägermantels infolge der ihm eigenen Elastizität eine radial nach innen hin von der idealen Zylinderform abweichende Form einnimmt. Im Zustand mit dem Druck p0 ist also der Trägermantel zumindest über den größten Teil seiner Außenumfangsfläche im Durchmesser kleiner als der Innendurchmesser einer zugehörigen Druckhülse. Wenn eine Druckhülse auf den Träger aufgeschoben ist und der Druck im Spaltraum über den Druck p1 auf einen noch höheren Druck p2 erhöht wird, nimmt die Außenumfangsfläche des Trägers zunächst wieder ihre zylindrische Form an, die sie bei dem Druck p1 erhalten hat. Die weitere Druckerhöhung sorgt nicht mehr für eine weitere Expansion des Außenumfangs des Trägers, sondern nur noch für eine Erhöhung der Anpreßkraft des Außenumfangs des Trägers an den Innenumfang der Hülse, da die Hülse hier hinsichtlich ihres Innendurchmessers nicht veränderlich ist. Der Druck p2 wird zweckmäßig durch Versuche ermittelt und so hoch gewählt, daß ein ausreichend sicherer Reibschluß zwischen Träger und Druckhülse gewährleitstet ist, der gegenseitige Verdrehungen im Betrieb des durch Träger und Druckhülse gebildeten Druckzylinders in einer Druckmaschine sicher ausschließt. Der Druck p0 kann beispielsweise der atmosphärische Luftdruck oder Umgebungsdruck sein, wodurch die Erzeugung eines Vakuums, was mit größerem technischem Aufwand verbunden wäre, nicht erforderlich ist. Die Verkleinerung des Außendurchmessers des Trägers ergibt sich aufgrund der elastischen Eigenschaften des Trägermantels ohne weitere Hilfsmittel, so daß insgesamt eine sehr einfache und doch zuverlässige Konstruktion ohne jegliche Gelenke oder andere verschleißende Elemente erreicht wird.Characterized in that the carrier coat is processed at a pressure p1 of the pressure medium in the gap to a cylindrical shape, it is ensured that at the lower pressure p0 the outer circumference of the carrier shell due to the inherent elasticity occupies a radially inwardly deviating from the ideal cylindrical shape. In the state with the pressure p0, therefore, the support jacket is at least over the largest part of its outer peripheral surface in diameter smaller than the inner diameter of an associated pressure sleeve. When a pressure sleeve is pushed onto the carrier and the pressure in the gap space above the pressure p1 is increased to an even higher pressure p2, the outer peripheral surface of the carrier first returns to its cylindrical shape, which it has received at the pressure p1. The further pressure increase no longer ensures a further expansion of the outer circumference of the carrier, but only for an increase in the contact pressure of the outer circumference of the carrier to the inner circumference of the sleeve, since the sleeve is not variable here in terms of their inner diameter. The pressure p2 is suitably determined by tests and selected so high that a sufficiently secure frictional engagement between the carrier and the pressure sleeve is guaran teed, the mutual rotations during operation safely excludes the pressure cylinder formed by the carrier and printing sleeve in a printing press. The pressure p0 may be, for example, the atmospheric air pressure or ambient pressure, whereby the generation of a vacuum, which would be associated with greater technical complexity, is not required. The reduction of the outer diameter of the carrier is due to the elastic properties of the carrier shell without further aids, so that a total of a very simple, yet reliable construction without any joints or other wearing elements is achieved.

Zwei Ausführungsbeispiele der Erfindung werden im folgenden anhand einer Zeichnung erläutert. Die Figuren der Zeichnung zeigen:

Figur 1
einen Träger zusammen mit einer Druckhülse in Ansicht, teils in aufgeschnittener Darstellung, in einer ersten Ausführung,
Figur 2
den Ausschnitt II in Figur 1 in einer vergrößerten Darstellung,
Figur 3
den Träger zusammen mit einer Druckhülse in gleicher Darstellungsweise wie in Figur 1, in einer zweiten Ausführung, und
Figur 4
den Ausschnitt IV in Figur 3 in vergrößerter Darstellung.
Two embodiments of the invention are explained below with reference to a drawing. The figures of the drawing show:
FIG. 1
a carrier together with a pressure sleeve in view, partly in a cutaway view, in a first embodiment,
FIG. 2
the detail II in Figure 1 in an enlarged view,
FIG. 3
the carrier together with a pressure sleeve in the same representation as in Figure 1, in a second embodiment, and
FIG. 4
the detail IV in Figure 3 in an enlarged view.

Figur 1 der Zeichnung zeigt teils in Ansicht, teils in geschnittener Darstellung einen Träger 1, der eine Druckhülse 2 trägt, wobei die Einheit aus Träger 1 und Druckhülse 2 einen Druckzylinder bildet.Figure 1 of the drawing shows partly in view, partly in a sectional view of a carrier 1, which carries a pressure sleeve 2, wherein the unit of carrier 1 and pressure sleeve 2 forms a pressure cylinder.

Der Träger 1 besteht aus einem in seiner Grundform hohlzylindrischen Trägerkern 10, der außenseitig unter Freilassung eines Spaltraums 11 von einem ebenfalls hohlzylindrischen Trägermantel 12 umgeben ist. Der Trägerkern 10 und der Trägermantel 12 sind dicht miteinander verbunden. Hierdurch wird ein abgeschlossener Spaltraum 11 gebildet.The carrier 1 consists of a hollow-cylindrical in its basic form carrier core 10, which is surrounded on the outside, leaving a gap 11 by a likewise hollow cylindrical carrier shell 12. The carrier core 10 and the carrier shell 12 are sealed together. As a result, a closed gap 11 is formed.

An beiden Stirnenden des Trägers 1 ist je ein Stirnendstück 15 mit je einem axial nach außen weisenden Lagerachsstummel 15' verdrehfest in den hohlzylindrischen Trägerkern 10 eingesetzt.At both ends of the carrier 1, a respective end face 15, each with an axially outwardly pointing Lagerachsstummel 15 'rotationally inserted into the hollow cylindrical carrier core 10.

Die Teile 10, 12 und 15 des Trägers 1 bestehen aus Metall, insbesondere aus Stahl oder Aluminium, was die nötige Stabilität gewährleistet und problemlose Schweißverbindungen erlaubt.The parts 10, 12 and 15 of the carrier 1 are made of metal, in particular steel or aluminum, which ensures the necessary stability and allows easy welding joints.

Durch den in Figur 1 linken Lagerachsstummel 15' und das zugehörige Stirnendstück 15 verläuft von axial außen her kommend eine Bohrung 16 axial und konzentrisch in Richtung zum Inneren des Trägers 1, endet aber vor dem hohlen Inneren des Trägers 1 im Abstand vor der axial inneren Stirnfläche des Stirnendstücks 15. Vom inneren Ende der Bohrung 16 verläuft eine Bohrung 16' in Radialrichtung nach außen bis in den Spaltraum 11.By the left in Figure 1 Lagerachsstummel 15 'and the associated front end 15 extends axially from the outside coming a bore 16 axially and concentrically toward the interior of the carrier 1, but ends before the hollow interior of the carrier 1 at a distance in front of the axially inner end face of the front end 15. From the inner end of the bore 16 extends a bore 16 'in the radial direction outwards into the gap space eleventh

Im axial inneren Endbereich der Bohrung 16 ist eine Kolben-Zylinder-Einheit 17 untergebracht. Diese Kolben-Zylinder-Einheit 17 besitzt einen verstellbaren Kolben, mit welchem der Druck eines im Spaltraum 11 und in der Bohrung 16' befindlichen Druckmediums verändert werden kann. Zur Veränderung der Position des Kolbens der Kolben-Zylinder-Einheit 17 ist hier eine Verstellschraube 17' vorgesehen, die in einem nicht eigens dargestellten Gewinde innerhalb der Bohrung 16 geführt ist. Mittels eines in Axialrichtung von außen her durch die Bohrung 16 zugeführten Drehwerkzeuges kann die Schraube 17' verdreht werden, wobei hierdurch eine axiale Verstellung der Lage der Schraube 17' und gleichzeitig des Kolbens der Kolben-Zylinder-Einheit 17 bewirkbar ist.In the axially inner end region of the bore 16, a piston-cylinder unit 17 is housed. This piston-cylinder unit 17 has an adjustable piston with which the pressure of a in the gap 11 and in the bore 16 'located pressure medium can be changed. To change the position of the piston of the piston-cylinder unit 17 here an adjusting screw 17 'is provided, which in a not specifically shown Thread within the bore 16 is guided. By means of a supplied in the axial direction from the outside through the bore 16 rotary tool, the screw 17 'can be rotated, thereby an axial adjustment of the position of the screw 17' and at the same time the piston of the piston-cylinder unit 17 is effected.

Figur 2 zeigt in der Ausschnittsdarstellung den Aufbau des Trägers 1 nahe seinem in Figur 1 linken Stirnende. Links unten in Figur 2 ist ein Teil des Stirnendstücks 15 mit der darin radial verlaufenden Bohrung 16' erkennbar. Das Stirnendstück 15 ist in den hohlzylindrischen Trägerkern 10 verdrehfest eingesetzt.FIG. 2 shows a detail of the structure of the carrier 1 near its left end in FIG. At the lower left in FIG. 2, a part of the front end piece 15 with the bore 16 'running radially therein can be seen. The front end 15 is inserted rotationally in the hollow cylindrical carrier core 10.

Der Trägerkern 10 besitzt an seinem Außenumfang eine Reihe von in Umfangsrichtung umlaufenden Eintiefungen, die durch umlaufende Stege 13 voneinander getrennt sind. Auf diese Weise wird ein Spaltraum 11 gebildet, der durch eine Reihe von in Axialrichtung nebeneinander liegenden, durch die Stege 13 getrennten Teil-Spalträume 11' gebildet ist. Die Teil-Spalträume 11' stehen untereinander in einer für das darin befindliche Druckmedium durchlässigen Verbindung.The carrier core 10 has on its outer circumference a series of circumferential recesses in the circumferential direction, which are separated by circumferential ridges 13 from each other. In this way, a gap space 11 is formed, which is formed by a series of axially adjacent, separated by the webs 13 part-gap spaces 11 '. The partial gap spaces 11 'are mutually in a permeable to the pressure medium therein communication.

Radial nach außen hin folgt auf den Trägerkern 10 und den Spaltraum 11 aus den Teil-Spalträumen 11' der ebenfalls hohlzylindrische Trägermantel 12. Der Trägermantel 12 ist entlang von stirnseitigen sowie in Umfangsrichtung verlaufenden Schweißnähten 14, 14' dicht und fest mit dem Trägerkern 10 verbunden.Radially outward follows on the support core 10 and the gap 11 from the partial gap spaces 11 'of the likewise hollow cylindrical support jacket 12. The support jacket 12 is connected along frontally and circumferentially extending welds 14, 14' tightly and firmly connected to the carrier core 10 ,

Wie die Figuren 1 und 2 verdeutlichen, hat der Trägerkern 10 eine deutlich höhere Materialstärke als der Trägermantel 12. Der Trägermantel 12 hat eine geringere Materialstärke, die so bemessen ist, daß sich bei einer Änderung des Drucks des Druckmediums im Spaltraum 11 bzw. in den Teil-Spalträumen 11' eine Verformung der Außenumfangsfläche 12' des Trägermantels 12 bewirken läßt.As shown in FIGS. 1 and 2, the carrier core 10 has a significantly higher material thickness than the carrier shell 12. The carrier shell 12 has a smaller material thickness, which is dimensioned such that, in the case of a change the pressure of the pressure medium in the gap space 11 or in the partial gap spaces 11 'can cause a deformation of the outer peripheral surface 12' of the carrier shell 12.

Bei einem niedrigen Druck p0 hat die Außenumfangsfläche 12' des Trägermantels 12 eine Form, die zumindest über Teilflächen von einer idealen Zylinderform radial nach innen hin abweicht. In diesem Zustand des Trägermantels 12 kann die Druckhülse 2 mit geringem Kraftaufwand in Axialrichtung von dem Träger 1 abgezogen oder auf den Träger 1 aufgeschoben werden.At a low pressure p0, the outer peripheral surface 12 'of the carrier shell 12 has a shape that deviates radially inwardly at least over partial areas from an ideal cylindrical shape. In this state of the carrier shell 12, the pressure sleeve 2 can be withdrawn with little effort in the axial direction of the carrier 1 or pushed onto the carrier 1.

Eine Erhöhung des Drucks des Druckmediums im Spaltraum 11 auf einen Druck p2, der höher ist als der Druck p0, wird zunächst der Trägermantel 12 soweit expandiert, daß er wieder seine zylindrische Form der Außenumfangsfläche 12' erhält und sich dann mit zunehmender Andruckkraft an die zylindrische Innenumfangsfläche 21 der Druckhülse 2 anlegt.An increase in the pressure of the pressure medium in the gap 11 to a pressure p2, which is higher than the pressure p0, the support jacket 12 is first expanded so far that it again receives its cylindrical shape of the outer peripheral surface 12 'and then with increasing pressure force to the cylindrical Inner peripheral surface 21 of the pressure sleeve 2 applies.

Wie die Zeichnungsfiguren 1 und 2 veranschaulichen, hat die Druckhülse 2 hier eine relativ große Dicke, die dafür sorgt, daß die Druckhülse 2 einen festen Innen- und Außendurchmesser aufweist, der durch von innen her ausgeübte Kräfte nicht vergrößerbar ist. Durch die Beaufschlagung des Spaltraums 11 mit dem unter Druck stehenden Druckmedium wird ein sicherer Reibschluß zwischen der Außenumfangsfläche 12' des Trägermantels 12 und der Innenumfangsfläche 21 der Druckhülse 2 bewirkt, so daß gegenseitige Verdrehungen zwischen dem Träger 1 und der Druckhülse 2 beim Einsatz in einer Druckmaschine nicht auftreten können.As shown in drawing figures 1 and 2, the pressure sleeve 2 here has a relatively large thickness, which ensures that the pressure sleeve 2 has a fixed inner and outer diameter, which is not enlarged by forces exerted from the inside. By acting on the gap space 11 with the pressurized pressure medium, a secure frictional engagement between the outer peripheral surface 12 'of the support shell 12 and the inner peripheral surface 21 of the pressure sleeve 2 is effected, so that mutual rotations between the carrier 1 and the pressure sleeve 2 when used in a printing press can not occur.

Bei einer Erniedrigung des Drucks des Druckmediums im Spaltraum 11 auf den niedrigen Druck p0 stellt sich der Trägermantel 12 aufgrund der ihm eigenen Elastizität wieder auf eine Form zurück, die einen geringeren Außendurchmesser aufweist, wodurch dann ein Abziehen der Druckhülse 2 und das Aufschieben einer anderen Druckhülse 2 leicht und mit geringem Kraftaufwand möglich ist.With a reduction of the pressure of the pressure medium in the gap space 11 to the low pressure p0, the Carrier shell 12 due to its inherent elasticity back to a shape that has a smaller outer diameter, which then pulling off the pressure sleeve 2 and pushing on another pressure sleeve 2 is possible easily and with little effort.

Bei dem in den Figuren 3 und 4 gezeigten zweiten Ausführungsbeispiel eines Trägers 1 stimmt der Träger in weiten Teilen mit dem Träger 1 gemäß Figur 1 und Figur 2 überein.In the case of the second exemplary embodiment of a carrier 1 shown in FIGS. 3 and 4, the carrier corresponds in many parts to the carrier 1 according to FIG. 1 and FIG.

Als unterschiedliches Merkmal ist bei dem Träger 1 gemäß den Figuren 3 und 4 eine Gummierung 18 auf der Außenumfangsfläche 12' des Trägermantels 12 angebracht. Diese Gummierung 18 hat den Zweck, zum einen einen verbesserten Reibschluß zwischen der Außenumfangsfläche der Gummierung 18 und der Innenumfangsfläche 21 der Druckhülse 2 zu erzielen und zum anderen einen Oberflächenformausgleich zu bieten, für den Fall, daß die Außenumfangsfläche 12' des Trägermantels 12 in ihrem expandierten Zustand eine von einer idealen Zylinderform abweichende Oberflächenform hat. Diese Formabweichungen werden dann durch die Gummierung 18 oder eine gleichwirkende elastische Beschichtung ausgeglichen, so daß keinerlei Gefahr besteht, daß sich Formabweichungen der äußeren Umfangsfläche 12' des Trägermantels 12 bis auf die Außenumfangsfläche 20 der Druckhülse 2 fortpflanzen können. Damit sind in jedem Falle eine absolut zylindrische Oberflächenform der Außenumfangsfläche 20 der Druckhülse 2 und damit ein gutes Druckergebnis mit hoher Qualität gewährleistet.As a different feature, in the carrier 1 according to Figures 3 and 4, a rubber coating 18 on the outer peripheral surface 12 'of the carrier shell 12 is attached. This rubber coating 18 has the purpose, on the one hand to achieve an improved frictional engagement between the outer peripheral surface of the rubber coating 18 and the inner peripheral surface 21 of the pressure sleeve 2 and on the other to provide a surface shape compensation, in the event that the outer peripheral surface 12 'of the support jacket 12 in its expanded Condition has a deviating from an ideal cylindrical shape surface shape. These deviations in shape are then compensated by the rubber coating 18 or a similar elastic coating, so that there is no risk that shape deviations of the outer peripheral surface 12 'of the support shell 12 can propagate to the outer peripheral surface 20 of the pressure sleeve 2. Thus, an absolutely cylindrical surface shape of the outer peripheral surface 20 of the printing sleeve 2 and thus a good printing result with high quality are guaranteed in each case.

In ihren übrigen Teilen entsprechen der Träger 1 und die Druckhülse 2 dem Ausführungsbeispiel gemäß den Figuren 1 und 2.In its remaining parts, the carrier 1 and the pressure sleeve 2 correspond to the exemplary embodiment according to FIGS. 1 and 2.

Zur Herstellung des Trägers 1, wie er in den Zeichnungsfiguren 1 bis 4 dargestellt ist, wird bevorzugt das folgende Herstellungsverfahren angewendet:For the preparation of the carrier 1, as shown in the drawing figures 1 to 4, the following manufacturing method is preferably used:

Zunächst wird der Trägerkern 10 mit den Stirnendstücken 15 und den Lagerachsstummeln 15' versehen. Bei Bedarf kann dann anschließend die Bearbeitung der äußeren Umfangsfläche des Trägerkerns 10 zur Bildung des Spaltraums 11 bzw. der Teil-Spalträume 11' erfolgen. Nachfolgend wird der Trägermantel 12 auf den Trägerkern 10 aufgeschoben und dann dicht mit dem Trägerkern 10 entlang der Schweißnähte 14, 14' (vergleiche Figur 2 und Figur 4) verschweißt.First, the carrier core 10 is provided with the Stirnendstücken 15 and the Lagerachsstummeln 15 '. If necessary, then the machining of the outer peripheral surface of the carrier core 10 to form the gap space 11 and the partial gap spaces 11 'can then take place. Subsequently, the carrier jacket 12 is pushed onto the carrier core 10 and then welded tightly to the carrier core 10 along the welds 14, 14 '(see FIG. 2 and FIG. 4).

Danach wird der Spaltraum 11' mit Druckmedium unter einem Druck p1 gefüllt, wobei der Druck p1 größer ist als der oben erwähnte Druck p0 und kleiner ist als der ebenfalls zuvor erwähnte Druck p2. Durch den Druck p1 wird der Trägermantel 12, der in diesem Bearbeitungsschritt nach außen hin frei liegt und insbesondere nicht von einer Druckhülse 2 umgeben ist, in einem gewissen Maße expandiert. In diesem gegen seine ihm eigene Rückstellkraft expandierten Zustand wird der Trägermantel 12 an seiner Außenumfangsfläche 12' auf eine exakt zylindrische Form bearbeitet, z.B. durch einen Dreh- und/oder Schleifvorgang.Thereafter, the gap space 11 'is filled with pressure medium under a pressure p1, wherein the pressure p1 is greater than the above-mentioned pressure p0 and smaller than the pressure p2 also mentioned above. Due to the pressure p1, the carrier jacket 12, which is exposed to the outside in this processing step and in particular is not surrounded by a pressure sleeve 2, is expanded to a certain extent. In this state, which has been expanded against its own restoring force, the support jacket 12 is machined on its outer circumferential surface 12 'to an exactly cylindrical shape, e.g. by a turning and / or grinding process.

Wird nach dieser Bearbeitung der Druck des Druckmediums im Spaltraum 11 auf den niedrigen Druck p0 abgesenkt, stellt sich der Trägermantel 12 infolge seiner ihm eigenen Rückstellkraft zurück, wodurch seine äußere Umfangsfläche 12' eine Oberflächenform annimmt, die radial nach innen von der zuvor eingenommenen Zylinderform abweicht. Zumindest über den größten Teil der Außenumfangsfläche 12' wird somit der Durchmesser des Trägers 1 verkleinert und die Druckhülse 2 kann in diesem Zustand kräftearm auf den Träger 1 aufgeschoben bzw. zum Zweck eines Hülsenwechsels vom Träger 1 abgezogen werden.If, after this processing, the pressure of the pressure medium in the gap 11 is lowered to the low pressure p0, the carrier shell 12 returns due to its own restoring force, whereby its outer peripheral surface 12 'assumes a surface shape which deviates radially inwardly from the previously assumed cylindrical shape , At least over most of the outer peripheral surface 12 'thus the diameter of the carrier 1 is reduced and the pressure sleeve 2 can be pushed with little effort in this state on the carrier 1 or withdrawn from the carrier 1 for the purpose of a sleeve change.

Claims (10)

  1. Cylindrical carrier (1) for receiving a hollow cylindrical printing sleeve (2) exchangeable by axially pushing it on and pulling it off,
    wherein the carrier (1) comprises a carrier core (10) and a carrier jacket (12) surrounding the latter radially outside;
    wherein the carrier jacket (12) is sealingly connected with the carrier core (10) at least on the front end side;
    wherein a gap space (11) chargeable with a pressure medium is provided between the outer circumference of the carrier core (10) and the inner circumference of the carrier jacket (12);
    wherein, at a first pressure p0 of the pressure medium in the gap space (11), the carrier jacket (12) comprises - at least over one part of its axial length - an outer circumferential surface (12') deviating from the cylinder form radially towards the inside, allowing the printing sleeve (2) to be pushed on and pulled off at a low-force; and
    wherein, at a second, higher pressure p2 of the pressure medium in the gap space (11), the carrier jacket (12) comprises an expanded outer circumferential surface (12')which is adjacent, over the partial or complete surface, in a frictionally locking manner to the inner circumferential surface (21) of a pushed-on printing sleeve (2),
    characterized in that the carrier jacket (12) is provided with an elastic coating (18) on its outer circumferential surface (12').
  2. Carrier according to claim 1, characterized in that the elastic coating (18) is formed by rubber coating or by a layer of polyurethane or silicone rubber.
  3. Carrier according to claim 1 or 2, characterized in that the carrier jacket (12) between the two front ends of the carrier (1) is connected with the carrier core (10) along a plurality of connecting lines (14, 14') extending in circumferential direction, wherein the gap space (11) is formed by a plurality of partial gap spaces (11') being in a permeable interconnection with each other for the pressure medium.
  4. Carrier according to claim 3, characterized in that the partial gap spaces (11') are formed by cavities extending in the circumferential direction of the carrier core (10) and being limited by outwardly protruding fins (13) extending in the circumferential direction of the carrier core (10).
  5. Carrier according to any one of the preceding claims, characterized in that the carrier core (10) and the carrier jacket (12) are made of steel or aluminum and connected with each other by weld seams.
  6. Carrier according to any one of the preceding claims, characterized in that the carrier core (10) is a hollow cylinder and comprises, on its front faces, one inserted front end piece (15) each with one bearing journal (15') each and that a duct (16, 16') is passed through at least one front end piece (15) for the supply and/or discharge of the pressure medium.
  7. Carrier according to any one of the preceding claims, characterized in that a device (17, 17') is provided in the carrier core (10) for producing and/or changing the pressure of the pressure medium, the device being operable or switchable from the outside of the carrier core (10).
  8. Carrier according to claim 7, characterized in that the device (17, 17') is a piston cylinder arrangement provided in a front-end front end piece (15) or bearing journal (15') of the carrier core (10).
  9. Carrier according to claim 8, characterized in that the piston of the device (17, 17') is slidable by an adjusting tool feedable from the outside or by an adjusting device switchable from the outside.
  10. Carrier according to any one of the preceding claims, characterized in that the pressure medium is a gas, preferably air, or a liquid, preferably oil, or a viscous mass, preferably lubricating grease.
EP04026661A 2003-11-12 2004-11-10 Cylindrical carrier for receiving an exchangeable printing sleeve and method for its manufacturing Expired - Lifetime EP1531046B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04026661T PL1531046T3 (en) 2003-11-12 2004-11-10 Cylindrical carrier for receiving an exchangeable printing sleeve and method for its manufacturing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10352817A DE10352817A1 (en) 2003-11-12 2003-11-12 Cylindrical carrier for receiving a replaceable printing sleeve and method for producing the carrier
DE10352817 2003-11-12

Publications (2)

Publication Number Publication Date
EP1531046A1 EP1531046A1 (en) 2005-05-18
EP1531046B1 true EP1531046B1 (en) 2008-01-02

Family

ID=34428691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04026661A Expired - Lifetime EP1531046B1 (en) 2003-11-12 2004-11-10 Cylindrical carrier for receiving an exchangeable printing sleeve and method for its manufacturing

Country Status (5)

Country Link
EP (1) EP1531046B1 (en)
AT (1) ATE382480T1 (en)
DE (2) DE10352817A1 (en)
ES (1) ES2298667T3 (en)
PL (1) PL1531046T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110216976A (en) * 2019-07-16 2019-09-10 深圳市兴博防伪技术开发有限公司 A kind of rubber roller

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1297413B (en) * 1965-12-09 1969-06-12 Saueressig Kg Geb Roller with jacket connected non-rotatably to a roller core
IT1222651B (en) * 1987-09-11 1990-09-05 Cerutti Spa Off Mec PRINTING CYLINDER FOR ROTARY PRINTING MACHINES
IT1277167B1 (en) * 1995-03-20 1997-11-05 Rossini Erminio Spa IMPROVEMENTS TO DEFORMABLE SPINDLES FOR ROTARY PRINTING CYLINDERS
US6161478A (en) * 1999-11-02 2000-12-19 The Holdrite Co., Inc. Printing cylinder assembly

Also Published As

Publication number Publication date
ATE382480T1 (en) 2008-01-15
EP1531046A1 (en) 2005-05-18
DE10352817A1 (en) 2005-06-23
ES2298667T3 (en) 2008-05-16
DE502004005815D1 (en) 2008-02-14
PL1531046T3 (en) 2008-06-30

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