EP1177100B1 - Expandable layer made of a compressible material - Google Patents

Expandable layer made of a compressible material Download PDF

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Publication number
EP1177100B1
EP1177100B1 EP00926708A EP00926708A EP1177100B1 EP 1177100 B1 EP1177100 B1 EP 1177100B1 EP 00926708 A EP00926708 A EP 00926708A EP 00926708 A EP00926708 A EP 00926708A EP 1177100 B1 EP1177100 B1 EP 1177100B1
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EP
European Patent Office
Prior art keywords
depressions
expandable layer
sleeve
layer
circumferential surface
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EP00926708A
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German (de)
French (fr)
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EP1177100A1 (en
Inventor
Kilian Saueressig
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Saueressig GmbH and Co KG
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Saueressig GmbH and Co KG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/10—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders
    • B41F27/105—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders for attaching cylindrical printing formes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N7/00—Shells for rollers of printing machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/04—Intermediate layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/14—Location or type of the layers in shells for rollers of printing machines characterised by macromolecular organic compounds

Definitions

  • the invention relates to an expansion layer of compressible material, which may be arranged in a rotary printing form between a carrier core and a sleeve, wherein on the outer peripheral surface or on the inner peripheral surface of the expansion layer recesses are arranged, which are at least partially formed as circumferential open ring channels, and a rotary printing form and a carrier core having such a stretch layer.
  • rotary printing forms are frequently used in which a sleeve is seated on a metallic roll core.
  • the sleeves are often produced galvanically, for example as nickel sleeves, or consist of fiber-reinforced thermosetting materials.
  • the functional profile On the outer surface of the sleeve is the functional profile.
  • metal cylinders with a technical surface such as polytetrafluoroethylene coatings, which have a dehydrating effect, metallic sleeves or hollow cylinders with a technical surface, and wound fiber-reinforced thermoset sleeves with a technical surface.
  • the technical sleeves like the sleeves for flexographic printing, can be pneumatically mounted on roll cores. They are also used as tubes or as semi-finished products for cylinder production.
  • Sleeves are more and more made with the help of thermoplastic pipes or hoses or composite materials.
  • the tubular semi-finished products are mounted or pushed by means of heat supply to a conical cylinder. This is described in more detail in DE 198 54 735.8.
  • Non-conical production cylinders can also be used in the production of the sleeve. After warming up the manufacturing cylinder, for example via a heat transfer fluid or via an upstream heating process, the tubular semifinished product is pushed by means of a Aufpreßcardi on the production cylinder. It is also possible to direct the semi-finished product directly from an extruder to the production core. After Aufschiebeporgang the manufacturing core is cooled, so that consolidates the thermoplastic material of the sleeve.
  • the tensile stresses that are frozen after the consolidation can be adjusted so that the sleeve can remain on the production cylinder or be removed from the mold.
  • the demoulding is done for example by means of a scraper.
  • the demolded sleeves can be placed on a corresponding support cylinder and also removed again. This can be done pneumatically or mechanically.
  • the connection of the sleeve to the carrier core which consists for example of steel or plastic, can produce by means of friction or positive engagement.
  • the sleeve is manufactured on a production core, which has a slightly smaller diameter than the later carrier core.
  • the manufacturing core can also have the same dimensions, in which case the shrinkage stresses generated during production are utilized.
  • the sleeve is manufactured on a production core having geometric structures, such as grooves, which are molded into the sleeve.
  • the carrier cores carry the complementary structure, so that is ensured by the combination for the positive engagement.
  • the stretch layer also has the advantage that small bumps, for example, on the inside of the tubular body for the sleeve do not affect, since they are compensated by the stretch on the subsequent carrier core. Thus, no elaborate internal machining by honing and the like is required. Thus, otherwise critical semi-finished products such as extruded thermoplastic tubes or pipes produced by Pulltrusion fiber composite plastics can be used for the sleeve. There remains the advantage that geometric structures are molded on the production cylinder during manufacture.
  • the stretch layer thus stores the one hand, the force that is necessary for the frictional connection of the carrier cylinder and sleeve, thus ensuring the adhesion between them. At the same time, an even distribution of the surface pressure is ensured.
  • a functional profile is introduced into the sleeve after the production process. This can be done by direct structuring by means of laser beam, by ablation from the ionized state or by mechanical processing. Also, in a second process coatings of polyurethane, polytetrafluoroethylene, copper and the like can be applied, which are then available as a functional layer. Flexoclips can be glued directly on. Depending on the later purpose tubular body of various materials and dimensions are used. The use of stretch layers makes it possible that the sleeve itself may have a thick wall thickness, so that they can stretch only slightly.
  • the sleeve is used as a printing plate in gravure printing, flexographic printing or embossing, with the help of a laser Sieb Modellen can continue to be introduced into the sleeve
  • the functional layer may for example also be a wear protection layer.
  • the flexible design of the surface also makes it possible to use it as a textile printing stencil.
  • EP 0 196 443 A2 discloses a sleeve whose inner layer consists of an elastic rubber material, and which is provided on its outer side with grooves extending in the circumferential direction. Air ducts are filled with compressed air during mounting and have no influence on the compressibility of the position in which they are located. A similar sleeve is described in US 4,864,926. Both sleeves must be mounted with compressed air.
  • depressions are arranged on the outer peripheral surface of the expansion layer or on its inner peripheral surface.
  • the depressions may extend in the axial and / or radial direction on the stretch layer and have a wide variety of shapes and cross sections. They can also be formed as holes, which continue, for example, hole structures in the sleeve through the stretch layer. At least a part the recesses are formed according to a required bending compensation of the sleeve.
  • a portion of the material of the expansion layer is displaced during the mounting of the sleeve, so that the compressibility of the expansion layer is increased.
  • they can also compensate for the bending of the sleeve.
  • the invention provides a carrier core having a stretchable layer of compressible material that may be disposed in a rotary printing form between the carrier core and a sleeve, with recesses being disposed on the outer peripheral surface or on the inner peripheral surface of the extension layer, with a first portion of depressions extend in the axial direction on the expansion layer and a further part of depressions extend in the radial direction on the expansion layer, wherein a portion of the material of the expansion layer is displaceable in the recesses and at least a portion of the recesses are formed according to a required bending compensation of the sleeve.
  • the invention also cites a rotary printing form having a stretchable layer of compressible material disposed in the rotary printing form between a carrier core and a sleeve, with recesses being arranged on the outer peripheral surface or on the inner circumferential surface of the expansion layer, wherein according to the invention a first part of depressions extend in the axial direction on the expansion layer and a further part of depressions extend in the radial direction on the expansion layer, wherein a portion of the material of the expansion layer is displaceable in the recesses and at least a portion of the recesses are formed according to a required bending compensation of the sleeve.
  • the recesses are at least partially formed as circumferential open ring channels.
  • the ring channels can run parallel to each other.
  • the ring channels are arranged equidistantly; if the bending compensation requires it differently, however, ring channel groupings in which the ring channels lie relatively close to one another are also possible.
  • the recesses may be at least partially formed as channels for liquid or gaseous media, which serve for example for cooling or heating of the sleeve.
  • the channels can also spray channels for color or sow g be channels.
  • the stretch layer preferably consists of an elastic material with a gaseous filling, for example a plastic foam or expanded polystyrene beads.
  • the elastic material and / or the wear protection layer is provided with electrically conductive particles.
  • FIG. 1 shows a cylindrical carrier core 2, on which an expansion layer 3 is located.
  • This expansion layer is provided on its outer circumference with a plurality of depressions 4, which are formed here as an open circumferential annular channels.
  • the stretch layer 3 may have on its outer side a wear protection layer, which is not shown.
  • a sleeve 1 is pushed onto the carrier core 2 and the stretch layer 3 from the left side of the drawing figure.
  • a trained by carrier core 2 and 3 stretched channel 5 is provided, via which the sleeve 1 can be pressurized. This is generated for example by a gaseous medium.
  • FIG. 1 clearly shows that those regions of the stretch layer 3 which are already under the sleeve 1 are strongly compressed, with part of the material of the stretch layer being displaced into the depressions 4.
  • Figure 2 shows the fully wound sleeve.

Abstract

An expandable layer made of compressible material placed in a rotary printing from between a core cylinder and a sleeve. An embodiment includes depressions on the outer circumferential surface and/or the inner circumferential surface of the expandable layer. The depressions can be, at least partly, fashioned as open circumferential annular channels. In addition, at least some of the depressions and annular channels can be arranged according to a required bending compensation of the sleeve. In another embodiment, an initial section of the depressions stretches in an axial direction on the expandable layer and a subsequent section of the depressions stretches in a radial direction over the expandable layer, whereby a part of the material of the expandable layer can be displaced in the depressions and at least a portion of the depressions is arranged according to a required bending compensation of the sleeve.

Description

Die Erfindung betrifft eine Dehnschicht aus kompressiblem Material, die in einer Rotationsdruckform zwischen einem Trägerkern und einer Hülse angeordnet sein kann, wobei auf der Außenumfangsfläche oder auf der Innenumfangsfläche der Dehnschicht Vertiefungen angeordnet sind, die zumindest teilweise als umlaufende offene Ringkanäle ausgebildet sind, sowie eine Rotationsdruckform und ein Trägerkern mit einer solchen Dehnschicht.The invention relates to an expansion layer of compressible material, which may be arranged in a rotary printing form between a carrier core and a sleeve, wherein on the outer peripheral surface or on the inner peripheral surface of the expansion layer recesses are arranged, which are at least partially formed as circumferential open ring channels, and a rotary printing form and a carrier core having such a stretch layer.

In der Druckindustrie werden hauptsächlich zwei Verfahren, die mit Rotationsdruckformen arbeiten, unterschieden.In the printing industry, a distinction is mainly made between two methods which work with rotary printing plates.

Beim Tiefdruck kommen vorwiegend metallische Zylinder zum Einsatz, auf deren Oberfläche ein Funktionsprofil eingebracht ist. Üblicherweise werden Stahlwalzen galvanisch mit einer Kupferschicht überzogen, die dann das Funktionsprofil trägt.For gravure printing, predominantly metallic cylinders are used, on the surface of which a functional profile is introduced. Usually, steel rolls are galvanically coated with a copper layer, which then carries the functional profile.

Beim Flexodruck werden häufig Rotationsdruckformen verwendet, bei denen eine Hülse auf einem metallischen Walzenkem aufsitzt. Die Hülsen werden oftmals galvanisch, beispielsweise als Nickelhülsen, hergestellt oder bestehen aus faserverstärkten duroplastischen Materialien. Auf der äußeren Oberfläche der Hülse befindet sich das Funktionsprofil.In flexographic printing, rotary printing forms are frequently used in which a sleeve is seated on a metallic roll core. The sleeves are often produced galvanically, for example as nickel sleeves, or consist of fiber-reinforced thermosetting materials. On the outer surface of the sleeve is the functional profile.

In anderen technischen Bereichen verwendet man metallische Zylinder mit einer technischen Oberfläche, zum Beispiel Beschichtungen aus Polytetrafluorethylen, die dehäsiv wirken, metallische Hülsen oder Hohlzylinder mit einer technischen Oberfläche, sowie gewickelte faserverstärkte duroplastische Hülsen mit einer technischen Oberfläche. Die technischen Hülsen können dabei, wie die Hülsen für den Flexodruck, auf Walzenkerne pneumatisch aufgezogen werden. Sie werden auch als Rohre oder als Halbzeuge für die Zylinderfertigung eingesetzt.Other technical fields use metal cylinders with a technical surface, such as polytetrafluoroethylene coatings, which have a dehydrating effect, metallic sleeves or hollow cylinders with a technical surface, and wound fiber-reinforced thermoset sleeves with a technical surface. The technical sleeves, like the sleeves for flexographic printing, can be pneumatically mounted on roll cores. They are also used as tubes or as semi-finished products for cylinder production.

Hülsen werden mehr und mehr auch mit Hilfe von thermoplastischen Rohren oder Schläuchen oder aus Verbundwerkstoffen hergestellt. Hierbei werden die rohrförmigen Halbzeuge mit Hilfe von Wärmezufuhr auf einen konischen Zylinder aufgezogen bzw. aufgeschoben. Dieses ist in der DE 198 54 735.8 näher beschrieben. Auch nicht-konische Herstellungszylinder können bei der Fertigung der Hülse verwendet werden. Nach dem Aufwärmen des Herstellungszylinders, beispielsweise über eine Wärmetransportflüssigkeit oder über einen vorgeschalteten Aufheizprozeß wird das rohrförmige Halbzeug mittels einer Aufpreßrichtung auf den Herstellungszylinder aufgeschoben. Es ist auch möglich, das Halbzeug direkt aus einem Extruder auf den Herstellungskern zu leiten. Nach dem Aufschiebevorgang wird der Herstellungskern gekühlt, so daß sich das thermoplatische Material der Hülse konsolidiert. Je nach Einstellung der Fertigungsparameter können die nach der Konsolidierung eingefrorenen Zugspannungen so eingestellt werden, daß die Hülse auf dem Herstellungszylinder verbleiben oder entformt werden kann. Das Entformen geschieht beispielsweise mit Hilfe eines Abstreifers.Sleeves are more and more made with the help of thermoplastic pipes or hoses or composite materials. Here, the tubular semi-finished products are mounted or pushed by means of heat supply to a conical cylinder. This is described in more detail in DE 198 54 735.8. Non-conical production cylinders can also be used in the production of the sleeve. After warming up the manufacturing cylinder, for example via a heat transfer fluid or via an upstream heating process, the tubular semifinished product is pushed by means of a Aufpreßrichtung on the production cylinder. It is also possible to direct the semi-finished product directly from an extruder to the production core. After Aufschiebeporgang the manufacturing core is cooled, so that consolidates the thermoplastic material of the sleeve. Depending on the setting of the production parameters, the tensile stresses that are frozen after the consolidation can be adjusted so that the sleeve can remain on the production cylinder or be removed from the mold. The demoulding is done for example by means of a scraper.

Die entformten Hülsen können auf einen entsprechenden Trägerzylinder aufgesetzt und auch wieder entfernt werden. Dies kann pneumatisch oder mechanisch geschehen. Die Verbindung der Hülse zum Trägerkern, der beispielsweise aus Stahl oder Kunststoff besteht, kann mittels Reibschluß oder Formschluß erzeugen. Bei der reibschlüssigen Verbindung wird die Hülse auf einem Herstellungskern gefertigt, der einen geringfügig kleineren Durchmesser hat als der spätere Trägerkern. Der Herstellungskern kann auch die gleichen Abmaße haben, wobei dann die während der Herstellung erzeugten Schrumpfspannungen aufgenutzt werden.The demolded sleeves can be placed on a corresponding support cylinder and also removed again. This can be done pneumatically or mechanically. The connection of the sleeve to the carrier core, which consists for example of steel or plastic, can produce by means of friction or positive engagement. In the frictional connection, the sleeve is manufactured on a production core, which has a slightly smaller diameter than the later carrier core. The manufacturing core can also have the same dimensions, in which case the shrinkage stresses generated during production are utilized.

Bei der formschlüssigen Verbindung wird die Hülse auf einem Herstellungskern gefertigt, der geometrische Strukturen, beispielsweise Nuten, aufweist, die in die Hülse abgeformt werden. Die Trägerkerne tragen die komplementäre Struktur, so daß durch die Kombination für den Formschluß gesorgt wird.In the positive connection, the sleeve is manufactured on a production core having geometric structures, such as grooves, which are molded into the sleeve. The carrier cores carry the complementary structure, so that is ensured by the combination for the positive engagement.

Es hat sich als günstig erwiesen, wie auch schon in der DE 198 54 735 beschrieben, in der Regel den Trägerzylinder, gegebenenfalls aber auch die Hülse mit einer kompressiblen Dehnschicht zu versehen. Falls das Hülsenmaterial keine ausreichende Eigenelastizität hat, kann eine solche Dehnschicht für einen Ausgleich sorgen. Diese Dehnschicht wird insbesondere dann notwendig, wenn die Hülse lösbar befestigt werden soll. Sie verhindert, daß die Hülse beim Aufziehen oder Abziehen durch zu hohe Drücke beschädigt wird. Ferner kann sich durch Vermittlung der Dehnschicht die Flächenpressung, die auf die Hülse wirkt, gleichmäßig verteilen. Desweiteren ist eine Dehnschicht erforderlich, wenn bei der Entformung mit Hilfe von Preßluft das Luftkissen auf der gesamten Fläche wirksam werden muß, um ein problemloses Aufziehen und Entfernen der Hülse zu ermöglichen. Die Dehnschicht hat ferner den Vorteil, daß sich kleine Unebenheiten beispielsweise auf der Innenseite des rohrförmigen Grundkörpers für die Hülse nicht auswirken, da sie durch die Dehnschicht auf dem späteren Trägerkern ausgeglichen werden. Damit wird keine aufwendige Innenbearbeitung durch Honen und dergleichen erforderlich. So können auch ansonsten kritische Halbzeuge wie extrudierte thermoplastische Rohre oder durch Pulltrusion hergestellte Rohre aus Faser-Verbundkunststoffen für die Hülse eingesetzt werden. Es bleibt der Vorteil erhalten, daß geometrische Strukturen auf dem Herstellungszylinder bei der Herstellung abgeformt werden.It has proven to be favorable, as described in DE 198 54 735, usually to provide the support cylinder, but possibly also the sleeve with a compressible stretch layer. If the sleeve material does not have sufficient intrinsic elasticity, such an expansion layer can provide a balance. This stretch layer is particularly necessary when the sleeve is to be releasably secured. It prevents the sleeve from being damaged by excessive pressures when it is being pulled on or pulled off. Furthermore, by means of the expansion layer, the surface pressure acting on the sleeve, evenly distributed. Furthermore, an expansion layer is required when the demolding by means of compressed air, the air cushion on the entire surface must be effective to a trouble To allow mounting and removal of the sleeve. The stretch layer also has the advantage that small bumps, for example, on the inside of the tubular body for the sleeve do not affect, since they are compensated by the stretch on the subsequent carrier core. Thus, no elaborate internal machining by honing and the like is required. Thus, otherwise critical semi-finished products such as extruded thermoplastic tubes or pipes produced by Pulltrusion fiber composite plastics can be used for the sleeve. There remains the advantage that geometric structures are molded on the production cylinder during manufacture.

Die Dehnschicht speichert somit einerseits die Kraft, die für die reibschlüssige Verbindung von Trägerzylinder und Hülse notwendig ist und sorgt so für den Kraftschluß zwischen diesen. Gleichzeitig wird für eine gleichmäßige Verteilung der Flächenpressung gesorgt.The stretch layer thus stores the one hand, the force that is necessary for the frictional connection of the carrier cylinder and sleeve, thus ensuring the adhesion between them. At the same time, an even distribution of the surface pressure is ensured.

In die Hülse wird, wie bereits oben angesprochen, nach dem Fertigungsprozeß ein Funktionsprofil eingebracht. Dies kann durch Direktstrukturierung mittels Laserstrahl geschehen, durch Abtragen aus dem ionisierten Zustand oder auch durch mechanische Bearbeitung. Auch können in einem zweiten Prozeß Beschichtungen aus Polyurethan, Polytetrafluorethylen, Kupfer und dergleichen aufgebracht werden, die dann als Funktionsschicht zur Verfügung stehen. Flexoklischees können direkt aufgeklebt werden. Je nach dem späteren Einsatzzweck werden rohrförmige Grundkörper verschiedenster Materialien und Abmessungen verwendet. Die Verwendung von Dehnschichten macht es dabei möglich daß die Hülse selbst eine dicke Wandstärke aufweisen kann, so daß sie sich nur geringfügig dehnen läßt.As already mentioned above, a functional profile is introduced into the sleeve after the production process. This can be done by direct structuring by means of laser beam, by ablation from the ionized state or by mechanical processing. Also, in a second process coatings of polyurethane, polytetrafluoroethylene, copper and the like can be applied, which are then available as a functional layer. Flexoclips can be glued directly on. Depending on the later purpose tubular body of various materials and dimensions are used. The use of stretch layers makes it possible that the sleeve itself may have a thick wall thickness, so that they can stretch only slightly.

Die Hülse wird als Druckform im Tiefdruck, Flexodruck oder bei der Prägung eingesetzt, mit Hilfe eines Lasers können weiterhin Siebstrukturen in die Hülse eingebracht werdenThe sleeve is used as a printing plate in gravure printing, flexographic printing or embossing, with the help of a laser Siebstrukturen can continue to be introduced into the sleeve

Sie ist allgemein als technische Hülse verwendbar und wird dann gegebenenfalls ohne Trägerkern eingesetzt.It is generally usable as a technical sleeve and is then optionally used without a carrier core.

Die Funktionsschicht kann beispielsweise auch eine Verschleißschutzschicht sein.The functional layer may for example also be a wear protection layer.

Unter Funktionsprofil sollen auch Durchbrüche, Bohrungen und dergleichen durch die Hülse verstanden werden. So ist es auch möglich, die Hülse nachträglich mit Perforationen nach Art eines Siebes zu versehen. Dann kann eine solche Hülse beispielsweise als Rotationssieb zum Sieben von Schüttgütern oder als Saugzylinder, zum Beispiel um Folien anzusaugen oder um Wasser aus Papier abzuziehen, eingesetzt werden.By functional profile also breakthroughs, holes and the like should be understood by the sleeve. So it is also possible to provide the sleeve later with perforations in the manner of a sieve. Then, such a sleeve, for example, as a rotary screen for screening of bulk materials or as a suction cylinder, for example, to suck films or to remove water from paper, are used.

Durch die flexible Gestaltung der Oberfläche wird auch die Verwendung als Textildruckschablone möglich.The flexible design of the surface also makes it possible to use it as a textile printing stencil.

Aus der EP 0 196 443 A2 ist eine Hülse offenbart, deren innere Lage aus einem elastischen Gummimaterial besteht, und welche auf ihrer Außenseite mit in Umfangsrichtung verlaufenden Nuten versehen ist. Druckluftkanäle sind beim Aufziehen mit Preßluft gefüllt und haben keinen Einfluß auf die Kompressibilität der Lage, in der sie sich befinden. Eine ähnliche Hülse ist in der US 4,864,926 beschrieben. Beide Hülsen müssen mit Preßluft aufgezogen werden.From EP 0 196 443 A2 discloses a sleeve whose inner layer consists of an elastic rubber material, and which is provided on its outer side with grooves extending in the circumferential direction. Air ducts are filled with compressed air during mounting and have no influence on the compressibility of the position in which they are located. A similar sleeve is described in US 4,864,926. Both sleeves must be mounted with compressed air.

Aus der obigen Diskussion geht hervor, daß der Dehnschicht eine besondere Bedeutung zukommt. Es ist daher die Aufgabe der Erfindung, eine Dehnschicht, einen Trägerkern und eine Rotationsdruckform zur Verfügung zu stellen, die die ihr zukommenden Funktionen besser als bisher ausfüllen können, bei denen insbesondere eine Hülse auf verbesserte Weise aufgezogen werden kann.From the above discussion, it is apparent that the stretch layer is of particular importance. It is therefore an object of the invention to provide an expansion layer, a carrier core and a rotary printing form available, which can better fulfill their functions than hitherto, in which in particular a sleeve can be mounted in an improved manner.

Diese Aufgabe wird von einer Dehnschicht nach Anspruch 1, von einem Trägerkern nach Anspruch 7 und einer Rotationsdruckform nach Anspruch 8 gelöst. Vorteilhafte Ausgestaltungen sind Gegenstand der Unteransprüche.This object is achieved by an expansion layer according to claim 1, a carrier core according to claim 7 and a rotary printing form according to claim 8. Advantageous embodiments are the subject of the dependent claims.

Erfindungsgemäß ist vorgesehen, daß auf der Außenumfangsfläche der Dehnschicht oder auf ihrer Innenumfangsfläche Vertiefungen angeordnet sind. Die Vertiefungen können sich in axialer und/oder radialer Richtung auf der Dehnschicht erstrecken und unterschiedlichste Formen und Querschnitte aufweisen. Sie können auch als Löcher ausgebildet sein, die beispielsweise Lochstrukturen in der Hülse durch die Dehnschicht fortsetzen. Zumindest ein Teil der Vertiefungen sind entsprechend einer erforderlichen Biegekompensation der Hülse ausgebildet.According to the invention it is provided that depressions are arranged on the outer peripheral surface of the expansion layer or on its inner peripheral surface. The depressions may extend in the axial and / or radial direction on the stretch layer and have a wide variety of shapes and cross sections. They can also be formed as holes, which continue, for example, hole structures in the sleeve through the stretch layer. At least a part the recesses are formed according to a required bending compensation of the sleeve.

In die Vertiefungen wird beim Aufziehen der Hülse ein Teil des Materials der Dehnschicht verdrängt, so daß die Kompressibilität der Dehnschicht vergrößert wird. Je nach Verteilung, Form und geometrischer Anordnung der Vertiefungen können sie auch die Biegung der Hülse kompensieren.In the wells, a portion of the material of the expansion layer is displaced during the mounting of the sleeve, so that the compressibility of the expansion layer is increased. Depending on the distribution, shape and geometric arrangement of the wells, they can also compensate for the bending of the sleeve.

Weiter führt die Erfindung auf einen Trägerkern mit einer Dehnschicht aus kompressiblem Material an, die in einer Rotationsdruckform zwischen dem Trägerkern und einer Hülse angeordnet sein kann, wobei auf der Außenumfangsfläche oder auf der Innenumfangsfläche der Dehnschicht Vertiefungen angeordnet sind, wobei sich ein erster Teil von Vertiefungen in axialer Richtung auf der Dehnschicht erstrecken und sich ein weiterer Teil von Vertiefungen in radialer Richtung auf der Dehnschicht erstrecken, wobei ein Teil des Materials der Dehnschicht in die Vertiefungen verdrängbar ist und zumindest ein Teil der Vertiefungen entsprechend einer erforderlichen Biegekompensation der Hülse ausgebildet sind.Further, the invention provides a carrier core having a stretchable layer of compressible material that may be disposed in a rotary printing form between the carrier core and a sleeve, with recesses being disposed on the outer peripheral surface or on the inner peripheral surface of the extension layer, with a first portion of depressions extend in the axial direction on the expansion layer and a further part of depressions extend in the radial direction on the expansion layer, wherein a portion of the material of the expansion layer is displaceable in the recesses and at least a portion of the recesses are formed according to a required bending compensation of the sleeve.

Die Erfindung führt auch auf eine Rotationsdruckform mit einer Dehnschicht aus kompressiblem Material an, die in der Rotationsdruckform zwischen einem Trägerkern und einer Hülse angeordnet ist, wobei auf der Außenumfangsfläche oder auf der Innenumfangsfläche der Dehnschicht Vertiefungen angeordnet sind, wobei sich erfindungsgemäß ein erster Teil von Vertiefungen in axialer Richtung auf der Dehnschicht erstrecken und sich ein weiterer Teil von Vertiefungen in radialer Richtung auf der Dehnschicht erstrecken, wobei ein Teil des Materials der Dehnschicht in die Vertiefungen verdrängbar ist und zumindest ein Teil der Vertiefungen entsprechend einer erforderlichen Biegekompensation der Hülse ausgebildet sind.The invention also cites a rotary printing form having a stretchable layer of compressible material disposed in the rotary printing form between a carrier core and a sleeve, with recesses being arranged on the outer peripheral surface or on the inner circumferential surface of the expansion layer, wherein according to the invention a first part of depressions extend in the axial direction on the expansion layer and a further part of depressions extend in the radial direction on the expansion layer, wherein a portion of the material of the expansion layer is displaceable in the recesses and at least a portion of the recesses are formed according to a required bending compensation of the sleeve.

Nach einer bevorzugten Ausführungsform sind die Vertiefungen zumindest teilweise als umlaufende offene Ringkanäle ausgebildet. Dabei können die Ringkanäle parallel zueinander verlaufen.According to a preferred embodiment, the recesses are at least partially formed as circumferential open ring channels. The ring channels can run parallel to each other.

Weiter bevorzugt sind die Ringkanäle äquidistant angeordnet; wenn es die Biegekompensation anders erfordert, sind aber auch Ringkanalgruppierungen, bei denen die Ringkanäle relativ dicht beieinander liegen, möglich.More preferably, the ring channels are arranged equidistantly; if the bending compensation requires it differently, however, ring channel groupings in which the ring channels lie relatively close to one another are also possible.

Die Vertiefungen können zumindest teilweise als Kanäle für flüssige oder gasförmige Medien ausgebildet sein, die beispielsweise zum Kühlen oder Heizen der Hülse dienen. Die Kanäle können auch Spritzkanäle für Farbe oder Saugkanäle sein.The recesses may be at least partially formed as channels for liquid or gaseous media, which serve for example for cooling or heating of the sleeve. The channels can also spray channels for color or sow g be channels.

Es hat sich als zweckmäßig herausgestellt, die Dehnschicht an ihrer Außenumfangsfläche mit einer Verschleißschutzschicht zu versehen. Insbesondere, wenn die Hülse häufig gewechselt wird, trägt diese Maßnahme zu einer erhöhten Lebensdauer der Dehnschicht bei.It has proven to be expedient to provide the expansion layer on its outer circumferential surface with a wear protection layer. In particular, when the sleeve is changed frequently, this measure contributes to an increased life of the stretch layer.

Die Dehnschicht besteht bevorzugt aus einem elastischen Material mit gasförmiger Füllung, beispielsweise einem Kunststoffschaum oder expandierten Polystryrolperlen.The stretch layer preferably consists of an elastic material with a gaseous filling, for example a plastic foam or expanded polystyrene beads.

Für einige Anwendungen kann es vorteilhaft sein, wenn das elastische Material und/oder die Verschleißschutzschicht mit elektrisch leitfähigen Partikeln versehen ist.For some applications, it may be advantageous if the elastic material and / or the wear protection layer is provided with electrically conductive particles.

Mit der neu gestalteten Dehnschicht können somit erweiterte Funktionen durchgeführt werden, wobei sie nach wie vor, auf dem Trägerkern bzw. auf der Innenseite der Hülse angeordnet, als verbesserte Ausgleichsschicht dient, die die Kontaktlinie, beispielsweise zwischen der Hülse und einem Presseur in einer Flexodruckmaschine, genau einrichtet.With the newly designed stretch layer thus extended functions can be performed, and it still, as arranged on the carrier core or on the inside of the sleeve, as an improved leveling layer is the contact line, for example, between the sleeve and a impression roller in a flexographic printing machine, set up exactly.

Im folgenden soll die Erfindung anhand der Zeichnung näher erläutert werden. Es zeigt:

Figur 1
einen Trägerkern mit aufgebrachter Dehnschicht während des Aufschiebens einer Hülse; und
Figur 2
die Hülse vollständig auf den Trägerkern aufgeschoben.
In the following the invention will be explained in more detail with reference to the drawing. It shows:
FIG. 1
a carrier core with an applied stretch layer during the sliding of a sleeve; and
FIG. 2
the sleeve is pushed completely onto the carrier core.

In Figur 1 ist ein zylindrischer Trägerkern 2 dargestellt, auf dem sich eine Dehnschicht 3 befindet. Diese Dehnschicht ist auf ihrem Außenumfang mit einer Vielzahl von Vertiefungen 4 versehen, die hier als offene umlaufende Ringkanäle ausgebildet sind. Die Dehnschicht 3 kann an ihrer Außenseite eine Verschleißschutzschicht aufweisen, die jedoch nicht dargestellt ist. Eine Hülse 1 wird auf Trägerkern 2 und Dehnschicht 3 von der linken Seite der Zeichnungsfigur aufgeschoben. Um das Aufschieben zu erleichtern, ist ein durch Trägerkern 2 und Dehnschicht 3 ausgebildeter Kanal 5 vorgesehen, über den die Hülse 1 mit Druck beaufschlagt werden kann. Dieser wird beispielsweise durch ein gasförmiges Medium erzeugt. Figur 1 zeigt deutlich, daß diejenigen Bereiche der Dehnschicht 3, die bereits unter der Hülse 1 liegen, stark komprimiert sind, wobei ein Teil des Materials der Dehnschicht in die Vertiefungen 4 verdrängt wird.FIG. 1 shows a cylindrical carrier core 2, on which an expansion layer 3 is located. This expansion layer is provided on its outer circumference with a plurality of depressions 4, which are formed here as an open circumferential annular channels. The stretch layer 3 may have on its outer side a wear protection layer, which is not shown. A sleeve 1 is pushed onto the carrier core 2 and the stretch layer 3 from the left side of the drawing figure. To facilitate the postponement, a trained by carrier core 2 and 3 stretched channel 5 is provided, via which the sleeve 1 can be pressurized. This is generated for example by a gaseous medium. FIG. 1 clearly shows that those regions of the stretch layer 3 which are already under the sleeve 1 are strongly compressed, with part of the material of the stretch layer being displaced into the depressions 4.

Figur 2 zeigt die vollständig aufgezogene Hülse.Figure 2 shows the fully wound sleeve.

Die in der vorstehenden Beschreibung, in der Zeichnung sowie in den Ansprüchen offenbarten Merkmale der Erfindung können sowohl einzeln als auch in beliebiger Kombination für die Verwirklichung der Erfindung wesentlich sein.The features of the invention disclosed in the foregoing description, in the drawing and in the claims may be essential for the realization of the invention both individually and in any desired combination.

Claims (8)

  1. An expandable layer comprising a compressible material, which is attached to a rotary printing form between a carrier core (2) and a sleeve (1), wherein the expandable layer (3) has depressions (4) on its outer circumferential surface or its inner circumferential surface, characterized in that a first part of said depressions (4) extend in axial direction on said expandable layer (3) and a further part of said depressions (4) extend in radial direction on said expandable layer (3), wherein a part of the material of said expandable layer can be displaced into said depressions and at least a part of said depressions (4) is arranged according to a required bending compensation of the sleeve (1).
  2. The expandable layer of claim 1, characterized in that the depressions (4) are, at least partly, fashioned as open circumferential annular channels, which run parallel to each other.
  3. The expandable layer of claim 1, characterized in that the depressions (4) are, at least partly, fashioned as channels for use with one of liquid media and a gaseous media.
  4. The expandable layer of claim 1 or 2, characterized in that the expandable layer is fitted with a wearing protection layer at its circumferential surface.
  5. The expandable layer of any of claims 1 to 4, wherein the expandable layer is made of an elastic material with gaseous filling, for example of plastic foam or expanded polystyrene pellets.
  6. The expandable layer of any of claims 1 to 5, characterized in that the elastic material and/or said wearing protection layer is fitted with electrical conduction particles.
  7. A carrier core with an expandable layer (3) made of compressible material, which may be attached to a rotary printing form between the carrier core (2) cylinder and a sleeve (1), wherein the expandable layer (3) has depressions (4) on its outer circumferential surface or its inner circumferential surface, characterized in that an initial section of the depressions (4) stretches in an axial direction on the expandable layer (3) and a subsequent section of the depressions (4) stretches in a radial direction over the expandable layer (3), whereby a part of the material of the expandable layer can be displaced in the depressions and at least a portion of the depressions (4) is arranged according to a required bending compensation of the sleeve (1).
  8. A rotary printing form with an expandable layer (3) made of compressible material, which is attached to the rotary printing form between a core cylinder (2) and a sleeve (1), wherein the expandable (3) layer has depressions (4) on its outer circumferential surface or its inner circumferential surface, characterized in that an initial section of the depressions (4) stretches in an axial direction on the expandable layer (3), and a subsequent section of the depressions (4) stretches in a radial direction over the expandable layer (3), whereby a part of the material of the expandable layer can be displaced in the depressions and at least a portion of the depressions (4) is arranged according to a required bending compensation of the sleeve (1).
EP00926708A 1999-04-23 2000-04-06 Expandable layer made of a compressible material Expired - Lifetime EP1177100B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19918432A DE19918432A1 (en) 1999-04-23 1999-04-23 Expansion layer of compressible material between core cylinder and its sleeve is provided with depressions on its outer or inner circumferential surface
DE19918432 1999-04-23
PCT/DE2000/001092 WO2000064675A1 (en) 1999-04-23 2000-04-06 Expandable layer made of a compressible material

Publications (2)

Publication Number Publication Date
EP1177100A1 EP1177100A1 (en) 2002-02-06
EP1177100B1 true EP1177100B1 (en) 2006-12-27

Family

ID=7905596

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00926708A Expired - Lifetime EP1177100B1 (en) 1999-04-23 2000-04-06 Expandable layer made of a compressible material

Country Status (8)

Country Link
US (1) US6823787B1 (en)
EP (1) EP1177100B1 (en)
AT (1) ATE349325T1 (en)
AU (1) AU4536800A (en)
DE (2) DE19918432A1 (en)
ES (1) ES2273690T3 (en)
MY (1) MY127056A (en)
WO (1) WO2000064675A1 (en)

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EP1228870A1 (en) * 2001-02-06 2002-08-07 Hannethane N.V. Covered rollers comprising air channels and method for covering a roller
ITBO20030148A1 (en) * 2003-03-20 2004-09-21 Serigrafia Tosi Srl METHOD FOR THE REALIZATION OF A ROLLER WITH ALVEOLED DIE
DE102004015248A1 (en) * 2004-03-29 2005-10-13 Goss International Montataire S.A. Lifting sleeve for a printing cylinder of an offset printing machine
DE102004043088A1 (en) * 2004-09-07 2006-03-09 Man Roland Druckmaschinen Ag Sleeve for a printing machine cylinder and printing press cylinder
US8686951B2 (en) 2009-03-18 2014-04-01 HJ Laboratories, LLC Providing an elevated and texturized display in an electronic device
US20110199342A1 (en) 2010-02-16 2011-08-18 Harry Vartanian Apparatus and method for providing elevated, indented or texturized sensations to an object near a display device or input detection using ultrasound
US8869965B2 (en) * 2012-09-25 2014-10-28 Shenzhen China Star Optoelectronics Technology Co., Ltd. Roller and conveying device with the same
EP2950146A1 (en) * 2014-05-28 2015-12-02 AKK GmbH Method and device for manufacturing a flexoprinting matrix

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DE1292958B (en) * 1962-12-01 1969-04-17 Saueressig Kg Geb Roller, especially printing roller for textile and paper printing
US3978254A (en) * 1975-01-27 1976-08-31 Mosstype Corporation Carrier sleeve for printing cylinder
DE2620549C2 (en) 1976-05-10 1985-10-24 Mosstype Corp., Waldwick, N.J. Carrier sleeve for flexible printing plates
US4378622A (en) * 1977-11-10 1983-04-05 Dayco Corporation Method of making compressible printing roller
DE3511530A1 (en) * 1985-03-29 1986-10-09 Saueressig & Co, 4426 Vreden LOW PRESSURE CYLINDER
EP0196443B1 (en) 1985-03-29 1990-05-23 Saueressig Gmbh & Co. Intaglio printing cylinder comprising a core and a detachable sleeve
DE3769641D1 (en) * 1987-06-19 1991-05-29 Saueressig Gmbh & Co LOW-PRINTING CYLINDER, COMPOSED FROM A CORE AND A SOLVABLE WITH THIS CONNECTED SLEEVE.
US4903597A (en) * 1988-10-24 1990-02-27 Lavalley Industries, Inc. Printing sleeves and methods for mounting and dismounting
JPH0869210A (en) * 1994-08-26 1996-03-12 Xerox Corp Xerographic-image formation apparatus
DE19634033C1 (en) * 1996-08-23 1998-03-26 Knut Dr Ing Bauer Pressure-resistant cylinder with core and casing
US5860360A (en) * 1996-12-04 1999-01-19 Day International, Inc. Replaceable printing sleeve
DE19854735B4 (en) 1998-11-27 2009-12-03 Saueressig Gmbh & Co. Method for producing a sleeve of thermally deformable material
DE19940429A1 (en) * 1999-08-26 2001-03-08 Contitech Elastomer Besch Gmbh Blanket sleeve for an offset printing machine

Also Published As

Publication number Publication date
DE19918432A1 (en) 2000-10-26
EP1177100A1 (en) 2002-02-06
AU4536800A (en) 2000-11-10
DE50013907D1 (en) 2007-02-08
US6823787B1 (en) 2004-11-30
WO2000064675A1 (en) 2000-11-02
ES2273690T3 (en) 2007-05-16
MY127056A (en) 2006-11-30
ATE349325T1 (en) 2007-01-15

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