EP1110748B1 - Printing blanket with isotropic reinforcing layer - Google Patents

Printing blanket with isotropic reinforcing layer Download PDF

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Publication number
EP1110748B1
EP1110748B1 EP00125256A EP00125256A EP1110748B1 EP 1110748 B1 EP1110748 B1 EP 1110748B1 EP 00125256 A EP00125256 A EP 00125256A EP 00125256 A EP00125256 A EP 00125256A EP 1110748 B1 EP1110748 B1 EP 1110748B1
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EP
European Patent Office
Prior art keywords
layer
reinforcing layer
sleeve
printing blanket
printing
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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
EP00125256A
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German (de)
French (fr)
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EP1110748A1 (en
Inventor
James Brian Vrotacou
Richard Karl Weiler
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Goss International Americas LLC
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Goss International Americas LLC
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Classifications

    • 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
    • B41N6/00—Mounting boards; Sleeves Make-ready devices, e.g. underlays, overlays; Attaching by chemical means, e.g. vulcanising
    • 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
    • B41N10/00—Blankets or like coverings; Coverings for wipers for intaglio printing
    • B41N10/02—Blanket structure
    • B41N10/04—Blanket structure multi-layer
    • 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
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/04—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
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/06—Backcoats; Back layers; Bottom 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
    • B41N2210/00—Location or type of the layers in multi-layer blankets or like coverings
    • B41N2210/14—Location or type of the layers in multi-layer blankets or like coverings characterised by macromolecular organic compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/909—Resilient layer, e.g. printer's blanket

Definitions

  • the present invention relates to a sleeve-shaped rubber blanket with a reinforcing layer, in particular a sleeve-shaped blanket for an offset printing press, according to the preamble of claim 1.
  • Such a blanket is known for example from EP-A-715 966 or US-A-5768990.
  • each of the printing units comprises an upper plate cylinder, an upper blanket cylinder, a lower blanket cylinder, and a lower plate cylinder.
  • Imaged printing plates can be applied to the plate cylinders.
  • On the blanket cylinder can be applied channelless, sleeve-shaped blankets.
  • the web is passed between the upper and lower blanket cylinders.
  • the tubular blanket used in the printing press comprises a compressive outer layer of an incompressible material, a second layer of compressible material disposed below the first layer, and a third layer of an incompressible material secured to a nickel base. It is mentioned in this document that a deformable fabric or a non-stretchable layer can be provided between the layers or in each of these layers.
  • US 5,304,267 and US 5,323,702 describe sleeve-shaped blankets having a printing outer layer of an elastomer, a non-stretchable layer disposed under the printing layer, and a compressible layer disposed below the non-stretchable layer bonded to a nickel sleeve.
  • the non-stretchable layer consists of a seamless tube body made of an elastomer and a thread in the tube body, which is not extensible in the longitudinal direction.
  • the seamless tube body can, for.
  • a plastic film spirally extends through a non-stretchable layer of an elastomer.
  • the plastic film is not welded or otherwise bonded and does not form an isotropic layer.
  • a sleeve-shaped blanket in which below the printing layer, an elastomeric layer is arranged with reinforcing fibers.
  • the elastomeric layer may be used as a nonwoven mat impregnated with an elastomer, e.g. B. be made of fiber-spun aramid fiber fleece or non-woven polyester spunbonded nonwoven. Holes formed in the web are filled with an elastomer in a complicated impregnation process.
  • the reinforced elastomeric layer is then either applied to the blanket by spirally winding the material or wrapping it around the base in the form of a piece of material so that the ends are flush with each other and then vulcanized or fused together. In this case, only the elastomeric material and not the material of which the mat is made merge.
  • the reinforcing layers of the blankets described above should provide stability, especially in the radial direction.
  • the sleeve-shaped rubber blankets described above have the disadvantage that the reinforcing layers arranged under the printing layer have too little intrinsic stiffness in the axial direction running transversely to the web running direction. This may lead to a relatively limited durability of the blanket, as in the circumferential direction cracks may occur, which can eventually lead to delamination or peeling of the blanket.
  • the reinforcing layers described above are further disposed directly over the compressible layer, which requires costly curing operations because of the risk of damaging the compressible layer.
  • a sleeve-shaped rubber blanket according to the invention comprises a sleeve-shaped printing layer, a sleeve-shaped, isotropic, possibly thermoplastic reinforcing layer arranged under the printing layer, a compressible layer arranged below the reinforcing layer and a sleeve base to which the compressible layer is applied directly or indirectly.
  • thermoplastic includes thermosetting materials.
  • the sleeve-shaped blanket preferably comprises an intermediate layer disposed between the sleeve and the compressible layer, which preferably consists of a hard rubber material.
  • the reinforcing layer is preferably made of polyester, more preferably preferably MYLAR® or MELENEX® from DuPont Corporation, and is preferably preformed into a sleeve so that it has isotropic properties.
  • the MYLAR® is preferably about 0.02032 cm (0.008 inches) thick and, in the relaxed state, has an inside diameter of e.g. B. about 17.908 cm (7.0504 inches).
  • the reinforcing layer is preferably made of a homogeneous thermoplastic film and is particularly preferably made of sheet-form isotropic thermoplastic material.
  • a sleeve blanket of the invention preferably comprises a sleeve-shaped printing layer, a sleeve-shaped, isotropic reinforcing layer disposed below the printing layer having an elasticity of between about 689,475,729,317 Pa and 6,894,757,293.17 Pa (100,000 and 1,000,000 psi), one below the Reinforcing layer arranged compressible layer and a sleeve base on which the compressible layer is applied directly or indirectly.
  • This high elasticity increases the axial stability.
  • the elasticity is preferably between 3,447,378,646.58 Pa and 6,894,757,293.17 Pa (500,000 and 1,000,000 psi).
  • the inventive method for the production of tubular blankets is defined in claim 10. It is contemplated that a sleeve-shaped reinforcing layer is formed and axially drawn over a compressible layer. The compressible layer is supported by a sleeve base. Subsequently, a printing layer is applied over the reinforcing layer.
  • the sleeve-shaped reinforcing layer is preferably made of a thermoplastic material, in particular preferably of a polyester film, for. B. MYLAR®. Furthermore, the sleeve-shaped reinforcing layer preferably has isotropic properties.
  • the inside of the reinforcing layer is subjected to compressed air during winding. Once the reinforcing layer is over the compressible layer, the supply of compressed air is discontinued so that the reinforcing layer contracts and tightens around the compressible layer.
  • the sleeve-shaped reinforcing layer is initially preferably mounted on a mandrel or mandrel whose diameter is greater than the diameter of the sleeve base.
  • a device for producing a sleeve-shaped blanket according to the invention comprises a first production cylinder with an outer diameter. At one end of the production cylinder, a mandrel attachment may be arranged whose outer diameter is greater than that of the production cylinder.
  • the outer surface of the spine attachment may further Include air holes through which the inside of an isotropic reinforcing layer can be acted upon with compressed air.
  • the blankets according to the invention have a greater durability than conventional blankets, since the isotropic reinforcing layer increases the axial stability.
  • the isotropic reinforcing layer increases the axial stability.
  • the tubular blanket 1 shows a perspective view of a preferred embodiment of a tubular blanket 1 according to the invention.
  • the tubular blanket 1 comprises a printing outer layer 2, a sleeve-shaped, isotropic, thermoplastic reinforcement layer 3, a compressible layer 4 and an inner sleeve base 5.
  • the printing outer layer 2, the compressible layer 4 and the inner sleeve base 5 may, for.
  • the printing layer is preferably made of rubber, the compressible layer of rubber with cavities and the sleeve base of nickel.
  • the sleeve-shaped reinforcing layer 3 is preferably made of a smooth, homogeneous polyester film, in particular MYLAR® (available from DuPont Corporation) and a polyester resin adhesive and is preferably isotropic.
  • the layer may, for. Example, consist of about 0.02032 cm (0.008 inch) thick mylar layer.
  • Fig. 2 shows a partial cross-sectional view of the blanket 1, in which the printing layer 2, the reinforcing layer 3, the compressible layer 4 and the sleeve base 5 are shown.
  • a compressible thread 6, which ensures the compressibility of the compressible layer 4 is shown schematically. It may also be provided air bubbles or bubbles of another gas, which cause the compressibility of the layer 4.
  • an intermediate layer of hard rubber is preferably applied between the compressible layer 4 and the sleeve base 5, an intermediate layer of hard rubber is preferably applied.
  • a partially assembled sleeve-shaped blanket 10 is shown on a production cylinder 20.
  • the blanket 10 already comprises a sleeve base 15 and a compressible layer 14.
  • An isotropic, sleeve-shaped reinforcing layer 13 is connected via a at one end 21 of the manufacturing cylinder 20 z. B. pushed by means of a screw assembly Dornaufsatz or mandrel 30 pushed.
  • air holes 22 and 23 are formed, which extend from an inner chamber 24 of the production cylinder 20 to the outer surface of the cylinder 20. It may also be provided more than the two holes shown.
  • the inner chamber 24 is connected to a compressed air source, by means of which the inner surface of the sleeve 15 can be applied to facilitate removal of the blanket 10 after its completion with compressed air.
  • the mandrel attachment 30 comprises an inflow opening 32, a circumferentially extending air gap 35 and outflow openings 33 and 34.
  • the inflow opening 32 is z. B. by means of a tube or a flexible hose to the compressed air source connectable.
  • the outer diameter of the mandrel attachment 30 substantially corresponds to the outer diameter of the compressible layer 14 and the inner diameter of the sleeve-shaped reinforcing layer 13.
  • the reinforcing layer 13 supported by the air flowing out of the outflow openings 33 and 34, axially into the by the arrow 40 indicated direction pushed over the spine attachment. It can also be provided more outflow openings.
  • the reinforcing layer 13 contracts again so that it is frictionally connected to the compressible layer 14.
  • This frictional engagement of the reinforcing layer 13 can additionally be assisted by an adhesive, in particular adhesive cement, on the outer surface of the compressible layer 14 or the inner surface of the reinforcing layer 14 or on both surfaces.
  • the printing layer can be applied to the reinforcing layer 13, for. B. by vulcanization of rubber.
  • the sleeve-shaped reinforcing layer 3 can be produced by spirally winding a first strip 40 of a polyester film (indicated by the dashed line) around the cylinder in such a manner that the edges adjoin one another. A second strip 42 of polyester film is then also spirally wound over the first strip 40 such that the edges of the first strip 40 are covered. Between the two strips 40 and 42 and the adjacent edges, a polyester resin adhesive is preferably applied, so that a uniform, isotropic polyester sleeve is formed. Subsequently, the edges can be preferably cut square, so that the sleeve-shaped layer 3 is formed.
  • the sleeve-shaped layer 3 Due to its isotropy and the thermoplastic properties of the material of which it is made, the sleeve-shaped layer 3 provides excellent radial and axial Stability.
  • the elasticity of the material preferably ranges between about 689,475,729,317 Pa and 6,894,757,293.17 Pa (100,000 and 1,000,000 psi), especially between 3,447,378,646.58 Pa and 6,894,757,293.17 Pa (500,000 and 1,000,000 psi).
  • thermoplastic sleeve-shaped layer can also consist of a sprayed or extruded or extruded material which has been shaped like a sleeve.

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  • Printing Plates And Materials Therefor (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Rubber lining (1) comprises a sleeve-like pressure layer (2); a sleeve-like isotropic thermoplastic reinforcing layer (3) arranged below the pressure layer; a compressing layer (4) arranged below the reinforcing layer and a sleeve base (5) on which the compressing layer is applied. Preferred Features: The reinforcing layer consists of a homogeneous film and an adhesive, both made of the same material.

Description

Die vorliegende Erfindung betrifft ein hülsenförmiges Gummituch mit einer Verstärkungsschicht, insbesondere ein hülsenförmiges Gummituch für eine Offsetdruckmaschine, gemäß dem Oberbegriff von Anspruch 1.The present invention relates to a sleeve-shaped rubber blanket with a reinforcing layer, in particular a sleeve-shaped blanket for an offset printing press, according to the preamble of claim 1.

Ein solches Gummituch ist zum Beispiel aus der EP-A-715 966 oder der US-A-5768990 bekannt.Such a blanket is known for example from EP-A-715 966 or US-A-5768990.

In der US 5,429,048 ist eine Offsetdruckmaschine beschrieben, bei der eine zu bedruckende Materialbahn durch eine Reihe von Druckwerken geführt wird. Jedes der Druckwerke umfasst einen oberen Plattenzylinder, einen oberen Gummituchzylinder, einen unteren Gummituchzylinder und einen unteren Plattenzylinder. Auf die Plattenzylinder können bebilderte Druckplatten aufgebracht werden. Auf die Gummituchzylinder können kanallose, hülsenförmige Gummitücher aufgebracht werden. Während des Druckbetriebs wird die Bahn zwischen dem oberen und dem unteren Gummituchzylinder hindurch geführt. Das in der Druckmaschine verwendete hülsenförmige Gummituch umfasst eine druckende äußere Schicht aus einem unkomprimierbaren Material, eine unter der ersten Schicht angeordnete zweite Schicht aus einem komprimierbaren Material und eine auf einer Nickelbasis befestigte dritte Schicht aus einem unkomprimierbaren Material. In dieser Schrift ist erwähnt, dass zwischen den Schichten oder in jeder dieser Schichten ein verformbares Gewebe oder eine nicht dehnbare Schicht vorgesehen sein kann.In US 5,429,048 an offset printing machine is described in which a material to be printed web is passed through a series of printing units. Each of the printing units comprises an upper plate cylinder, an upper blanket cylinder, a lower blanket cylinder, and a lower plate cylinder. Imaged printing plates can be applied to the plate cylinders. On the blanket cylinder can be applied channelless, sleeve-shaped blankets. During printing, the web is passed between the upper and lower blanket cylinders. The tubular blanket used in the printing press comprises a compressive outer layer of an incompressible material, a second layer of compressible material disposed below the first layer, and a third layer of an incompressible material secured to a nickel base. It is mentioned in this document that a deformable fabric or a non-stretchable layer can be provided between the layers or in each of these layers.

Die US 5,304,267 und die US 5,323,702 beschreiben hülsenförmige Gummitücher mit einer druckenden äußeren Schicht aus einem Elastomer, einer unter der druckenden Schicht angeordneten nicht dehnbaren Schicht und einer unter der nicht dehnbaren Schicht angeordneten komprimierbaren Schicht, die mit einer Nickelhülse verbunden ist. Die nicht dehnbare Schicht besteht aus einem nahtlosen Röhrenkörper aus einem Elastomer und einem Faden im Röhrenkörper, der in Längsrichtung nicht dehnbar ist. Der nahtlose Röhrenkörper kann z. B. aus einem Urethan-Copolymer, einem wärmeaushärtenden Polymer oder einem Gummimaterial bestehen. Das Material hat eine Elastizität im Bereich von etwa 17.236.893,23 Pa bis 68.947.572,93 Pa (2500 bis 10,000 psi). In einer alternativen Ausführungsform verläuft eine Kunststofffolie spiralförmig durch eine nicht dehnbare Schicht aus einem Elastomer. Die Kunststofffolie ist nicht verschweißt oder auf andere Weise verbunden und bildet keine isotrope Schicht.US 5,304,267 and US 5,323,702 describe sleeve-shaped blankets having a printing outer layer of an elastomer, a non-stretchable layer disposed under the printing layer, and a compressible layer disposed below the non-stretchable layer bonded to a nickel sleeve. The non-stretchable layer consists of a seamless tube body made of an elastomer and a thread in the tube body, which is not extensible in the longitudinal direction. The seamless tube body can, for. Example of a urethane copolymer, a thermosetting polymer or a rubber material. The material has an elasticity in the range from about 17,236,893.23 Pa to 68,947,572.93 Pa (2500 to 10,000 psi). In an alternative embodiment, a plastic film spirally extends through a non-stretchable layer of an elastomer. The plastic film is not welded or otherwise bonded and does not form an isotropic layer.

Aus der US 5,352,507 ist ein hülsenförmiges Gummituch bekannt, bei dem unterhalb der druckenden Schicht eine elastomere Schicht mit Verstärkungsfasern angeordnet ist. Die elastomere Schicht kann als eine mit einem Elastomer imprägnierte, ungewebte Matte z. B. aus faserstoffverwirbeltem Aramidfaservlies oder aus nicht gewebtem Polyester-Spinnvlies ausgebildet sein. Im Vlies gebildete Löcher werden in einem komplizierten Imprägnier-Vorgang mit einem Elastomer gefüllt. Die verstärkte Elastomer-Schicht wird dann entweder auf das Gummituch aufgebracht, indem das Material spiralförmig aufgewickelt wird oder in Form eines Materialstücks um die Basis herumgelegt wird, so dass die Enden bündig aneinandergrenzen, und dann vulkanisiert oder verschmolzen wird. Hierbei verschmilzt nur das elastomere Material und nicht das Material, aus dem die Matte besteht.From US 5,352,507 a sleeve-shaped blanket is known, in which below the printing layer, an elastomeric layer is arranged with reinforcing fibers. The elastomeric layer may be used as a nonwoven mat impregnated with an elastomer, e.g. B. be made of fiber-spun aramid fiber fleece or non-woven polyester spunbonded nonwoven. Holes formed in the web are filled with an elastomer in a complicated impregnation process. The reinforced elastomeric layer is then either applied to the blanket by spirally winding the material or wrapping it around the base in the form of a piece of material so that the ends are flush with each other and then vulcanized or fused together. In this case, only the elastomeric material and not the material of which the mat is made merge.

Die verstärkenden Schichten der oben beschriebenen Gummitücher sollen vor allem in radialer Richtung Stabilität schaffen. Die oben beschriebenen hülsenförmigen Gummitücher haben jedoch den Nachteil, dass die unter der druckenden Schicht angeordneten verstärkenden Schichten in der quer zur Bahnlaufrichtung verlaufenden axialen Richtung eine zu geringe Eigensteife aufweisen. Dies führt unter Umständen zu einer relativ begrenzten Haltbarkeit des Gummituchs, da in Umfangsrichtung Risse entstehen können, die schließlich zu einer Delaminierung oder zum Aufblättern des Gummituchs führen können. Die oben beschriebenen verstärkenden Schichten sind ferner direkt über der komprimierbaren Schicht angeordnet, was kostenintensive Aushärtungsvorgänge erforderlich macht, da die Gefahr der Beschädigung der komprimierbaren Schicht besteht.The reinforcing layers of the blankets described above should provide stability, especially in the radial direction. However, the sleeve-shaped rubber blankets described above have the disadvantage that the reinforcing layers arranged under the printing layer have too little intrinsic stiffness in the axial direction running transversely to the web running direction. This may lead to a relatively limited durability of the blanket, as in the circumferential direction cracks may occur, which can eventually lead to delamination or peeling of the blanket. The reinforcing layers described above are further disposed directly over the compressible layer, which requires costly curing operations because of the risk of damaging the compressible layer.

In der US 4,981,750 und der US 4,042,743 sind flache Gummitücher beschrieben, bei denen unter der druckenden Schicht eine verstärkende Schicht angeordnet ist. Diese Gummitücher müssen jedoch mittels eines Klemmmechanismus festgeklemmt werden und können nicht als hülsenförmige Gummitücher eingesetzt werden.In US 4,981,750 and US 4,042,743 flat blankets are described in which under the printing layer, a reinforcing layer is arranged. These Blankets must, however, be clamped by means of a clamping mechanism and can not be used as a sleeve-shaped blankets.

Es ist eine Aufgabe der vorliegenden Erfindung, die Haltbarkeit von hülsenförmigen Gummitüchern zu erhöhen und ein vereinfachtes Verfahren zur Herstellung von hülsenförmigen Gummitüchern zu schaffen.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruches 1 gelöst.It is an object of the present invention to increase the durability of sleeve blankets and to provide a simplified method of making tubular sleeve blankets.
This object is achieved by the features of claim 1.

Weitere Merkmale der Erfindung ergeben sich aus den Unteransprüchen.Further features of the invention will become apparent from the dependent claims.

Ein erfindungsgemäßes hülsenförmiges Gummituch umfasst eine hülsenförmige druckende Schicht, eine unter der druckenden Schicht angeordnete hülsenförmige, isotrope, eventuell thermoplastische Verstärkungsschicht, eine unter der Verstärkungsschicht angeordnete komprimierbare Schicht und eine Hülsenbasis, auf welche die komprimierbare Schicht direkt oder indirekt aufgebracht ist.A sleeve-shaped rubber blanket according to the invention comprises a sleeve-shaped printing layer, a sleeve-shaped, isotropic, possibly thermoplastic reinforcing layer arranged under the printing layer, a compressible layer arranged below the reinforcing layer and a sleeve base to which the compressible layer is applied directly or indirectly.

Die hülsenförmige, isotrope, vorzugsweise thermoplastische Verstärkungsschicht bietet aufgrund ihrer isotropen Eigenschaften und des vorzugsweise thermoplastischen Materials, aus dem sie besteht, axiale Stabilität. Die Bezeichnung "thermoplastisch" schließt wärmehärtbare Materialien ein.The sleeve-shaped, isotropic, preferably thermoplastic reinforcing layer provides axial stability due to its isotropic properties and preferably thermoplastic material of which it is composed. The term "thermoplastic" includes thermosetting materials.

Das hülsenförmige Gummituch umfasst vorzugsweise eine zwischen der Hülse und der komprimierbaren Schicht angeordnete Zwischenschicht, die vorzugsweise aus einem Hartgummi-Material besteht.The sleeve-shaped blanket preferably comprises an intermediate layer disposed between the sleeve and the compressible layer, which preferably consists of a hard rubber material.

Die Verstärkungsschicht besteht vorzugsweise aus Polyester, insbesondere vorzugsweise aus MYLAR® oder MELENEX® von DuPont Corporation, und ist vorzugsweise hülsenförmig vorgeformt, so dass es isotrope Eigenschaften hat. Das MYLAR® ist vorzugsweise etwa 0,02032 cm (0,008 inches) dick und weist im entspannten Zustand einen Innendurchmesser von z. B. etwa 17,908 cm (7,0504 inches) auf. Die Verstärkungsschicht besteht vorzugsweise aus einem homogenen thermoplastischen Film und ist insbesondere vorzugsweise aus isotropem, thermoplastischem Material in Bogenform hergestellt.The reinforcing layer is preferably made of polyester, more preferably preferably MYLAR® or MELENEX® from DuPont Corporation, and is preferably preformed into a sleeve so that it has isotropic properties. The MYLAR® is preferably about 0.02032 cm (0.008 inches) thick and, in the relaxed state, has an inside diameter of e.g. B. about 17.908 cm (7.0504 inches). The reinforcing layer is preferably made of a homogeneous thermoplastic film and is particularly preferably made of sheet-form isotropic thermoplastic material.

Ein erfindungsgemäßes hülsenförmiges Gummituch umfasst vorzugsweise eine hülsenförmige druckende Schicht, eine unter der druckenden Schicht angeordnete hülsenförmige, isotrope Verstärkungsschicht mit einer Elastizität von zwischen etwa 689.475.729,317 Pa und 6.894.757.293,17 Pa (100.000 und 1.000.000 psi), eine unter der Verstärkungsschicht angeordnete komprimierbare Schicht und eine Hülsenbasis, auf welche die komprimierbare Schicht direkt oder indirekt aufgebracht ist. Diese hohe Elastizität erhöht die axiale Stabilität. Die Elastizität beträgt insbesondere vorzugsweise zwischen 3.447.378.646,58 Pa und 6.894.757.293,17 Pa (500.000 und 1.000.000 psi).A sleeve blanket of the invention preferably comprises a sleeve-shaped printing layer, a sleeve-shaped, isotropic reinforcing layer disposed below the printing layer having an elasticity of between about 689,475,729,317 Pa and 6,894,757,293.17 Pa (100,000 and 1,000,000 psi), one below the Reinforcing layer arranged compressible layer and a sleeve base on which the compressible layer is applied directly or indirectly. This high elasticity increases the axial stability. In particular, the elasticity is preferably between 3,447,378,646.58 Pa and 6,894,757,293.17 Pa (500,000 and 1,000,000 psi).

Das erfindungsgemäße Verfahren zur Herstellung von hülsenförmigen Gummitüchern wird in Anspruch 10 definiert. Es sieht vor, dass eine hülsenförmige Verstärkungsschicht geformt und axial über eine komprimierbare Schicht aufgezogen wird. Die komprimierbare Schicht wird von einer Hülsenbasis gestützt. Anschließend wird über die Verstärkungsschicht eine druckende Schicht aufgezogen.The inventive method for the production of tubular blankets is defined in claim 10. It is contemplated that a sleeve-shaped reinforcing layer is formed and axially drawn over a compressible layer. The compressible layer is supported by a sleeve base. Subsequently, a printing layer is applied over the reinforcing layer.

Die hülsenförmige Verstärkungsschicht besteht vorzugsweise aus einem thermoplastischen Material, insbesondere vorzugsweise aus einem Polyesterfilm, z. B. MYLAR® . Weiterhin hat die hülsenförmige Verstärkungsschicht vorzugsweise isotrope Eigenschaften.The sleeve-shaped reinforcing layer is preferably made of a thermoplastic material, in particular preferably of a polyester film, for. B. MYLAR®. Furthermore, the sleeve-shaped reinforcing layer preferably has isotropic properties.

Weiterhin kann vorgesehen sein, dass die Innenseite der Verstärkungsschicht während des Aufziehens mit Druckluft beaufschlagt wird. Sobald sich die Verstärkungsschicht über der komprimierbaren Schicht befindet, wird die Druckluftzufuhr unterbrochen, so dass sich die Verstärkungsschicht zusammenzieht und fest um die komprimierbare Schicht herum legt. Die hülsenförmige Verstärkungsschicht wird zunächst vorzugsweise auf einen Dornaufsatz oder Spanndorn aufgezogen, dessen Durchmesser größer ist als der Durchmesser der Hülsenbasis.Furthermore, it can be provided that the inside of the reinforcing layer is subjected to compressed air during winding. Once the reinforcing layer is over the compressible layer, the supply of compressed air is discontinued so that the reinforcing layer contracts and tightens around the compressible layer. The sleeve-shaped reinforcing layer is initially preferably mounted on a mandrel or mandrel whose diameter is greater than the diameter of the sleeve base.

Eine Vorrichtung zur herstellung eines erfindungsgemäßen hülsenförmigen Gummituchs umfasst einen ersten Fertigungszylinder mit einem Außendurchmesser. An einem Ende des Fertigungszylinders kann ein Dornaufsatz angeordnet sein, dessen Außendurchmesser größer ist als der des Fertigungszylinders. Die Außenfläche des Dornaufsatzes kann ferner Luftlöcher umfassen, durch welche die Innenseite einer isotropen Verstärkungsschicht mit Druckluft beaufschlagbar ist.A device for producing a sleeve-shaped blanket according to the invention comprises a first production cylinder with an outer diameter. At one end of the production cylinder, a mandrel attachment may be arranged whose outer diameter is greater than that of the production cylinder. The outer surface of the spine attachment may further Include air holes through which the inside of an isotropic reinforcing layer can be acted upon with compressed air.

Die erfindungsgemäßen Gummitücher besitzen eine größere Haltbarkeit als herkömmliche Gummitücher, da die isotrope Verstärkungsschicht die axiale Stabilität erhöht. Bei der Herstellung von Gummitüchern, die eine hülsenförmige Verstärkungsschicht umfassen, entfällt die Notwendigkeit eines Aushärtevorgangs am Fertigungszylinder beim Aufbringen der Verstärkungsschicht. Da die Verstärkungsschicht in Massenproduktion vorgeformt werden kann, werden die Herstellungskosten reduziert.The blankets according to the invention have a greater durability than conventional blankets, since the isotropic reinforcing layer increases the axial stability. In the manufacture of blankets comprising a sleeve-shaped reinforcing layer, there is no need for a curing operation on the manufacturing cylinder during application of the reinforcing layer. Since the reinforcing layer can be preformed in mass production, the manufacturing cost is reduced.

Die Merkmale der vorliegenden Erfindung werden in der folgenden Beschreibung bevorzugter Ausführungsbeispiele in Zusammenhang mit den beigefügten, nachfolgend aufgeführten Zeichnungen näher erläutert.The features of the present invention will be explained in more detail in the following description of preferred embodiments in conjunction with the accompanying drawings listed below.

Es zeigen:

Fig. 1
eine perspektivische Darstellung eines erfindungsgemäßen Gummituchs;
Fig. 2
eine vereinfachte, schematische Querschnittansicht eines erfindungsgemäßen Gummituchs;
Fig. 3
eine Seitenansicht der Herstellung eines erfindungsgemäßen Gummituchs;
Fig. 4
eine schematische Darstellung des Aufbaus der hülsenförmigen isotropen Kunststoffschicht.
Show it:
Fig. 1
a perspective view of a blanket according to the invention;
Fig. 2
a simplified, schematic cross-sectional view of a blanket according to the invention;
Fig. 3
a side view of the production of a blanket according to the invention;
Fig. 4
a schematic representation of the structure of the sleeve-shaped isotropic plastic layer.

Fig. 1 zeigt eine perspektivische Darstellung einer bevorzugten Ausführungsform eines erfindungsgemäßen hülsenförmigen Gummituchs 1. Das hülsenförmige Gummituch 1 umfasst eine druckende äußere Schicht 2, eine hülsenförmige, isotrope, thermoplastische Verstärkungsschicht 3, eine komprimierbare Schicht 4 und eine innere Hülsenbasis 5.1 shows a perspective view of a preferred embodiment of a tubular blanket 1 according to the invention. The tubular blanket 1 comprises a printing outer layer 2, a sleeve-shaped, isotropic, thermoplastic reinforcement layer 3, a compressible layer 4 and an inner sleeve base 5.

Die druckende äußere Schicht 2, die komprimierbare Schicht 4 und die innere Hülsenbasis 5 können z. B. wie die in der US 5,304,267, der US 5,323,702 und der US 5,429,048 beschriebene druckende Schicht; komprimierbare Schicht und innere Hülsenbasis ausgebildet sein. Die druckende Schicht besteht vorzugsweise aus Gummi, die komprimierbare Schicht aus Gummi mit Hohlräumen und die Hülsenbasis aus Nickel.The printing outer layer 2, the compressible layer 4 and the inner sleeve base 5 may, for. Such as the printing layer described in US 5,304,267, US 5,323,702 and US 5,429,048; be formed compressible layer and inner sleeve base. The printing layer is preferably made of rubber, the compressible layer of rubber with cavities and the sleeve base of nickel.

Die hülsenförmige Verstärkungsschicht 3 besteht vorzugsweise aus einer glatten, homogenen Polyesterfolie, insbesondere aus MYLAR® (erhältlich bei DuPont Corporation) und einem Polyesterharz-Klebstoff und ist vorzugsweise isotrop. Die Schicht kann z. B. aus einer etwa 0,02032 cm (0,008 inch) dicken Mylarschicht bestehen.The sleeve-shaped reinforcing layer 3 is preferably made of a smooth, homogeneous polyester film, in particular MYLAR® (available from DuPont Corporation) and a polyester resin adhesive and is preferably isotropic. The layer may, for. Example, consist of about 0.02032 cm (0.008 inch) thick mylar layer.

Fig. 2 zeigt eine Querschnitts-Teilansicht des Gummituchs 1, in der die druckende Schicht 2, die Verstärkungsschicht 3, die komprimierbare Schicht 4 und die Hülsenbasis 5 gezeigt sind. Ein komprimierbarer Faden 6, der die Komprimierbarkeit der komprimierbaren Schicht 4 gewährleistet, ist schematisch dargestellt. Es können auch Luftblasen oder Blasen eines anderen Gases vorgesehen sein, welche die Komprimierbarkeit der Schicht 4 bewirken. Zwischen der komprimierbaren Schicht 4 und der Hülsenbasis 5 ist vorzugsweise eine Zwischenschicht aus Hartgummi aufgebracht.Fig. 2 shows a partial cross-sectional view of the blanket 1, in which the printing layer 2, the reinforcing layer 3, the compressible layer 4 and the sleeve base 5 are shown. A compressible thread 6, which ensures the compressibility of the compressible layer 4, is shown schematically. It may also be provided air bubbles or bubbles of another gas, which cause the compressibility of the layer 4. Between the compressible layer 4 and the sleeve base 5, an intermediate layer of hard rubber is preferably applied.

In Fig. 3 ist ein teilweise zusammengesetztes hülsenförmiges Gummituch 10 auf einem Fertigungszylinder 20 dargestellt. Das Gummituch 10 umfasst bereits eine Hülsenbasis 15 und eine komprimierbare Schicht 14. Eine isotrope, hülsenförmige Verstärkungsschicht 13 ist über einen an einem Ende 21 des Fertigungszylinders 20 z. B. mittels einer Schraubenanordnung befestigten Dornaufsatz oder Spanndorn 30 geschoben. Im Zylinder 20 sind Luftlöcher 22 und 23 gebildet, die von einer inneren Kammer 24 des Fertigungszylinders 20 ausgehend zur Außenoberfläche des Zylinders 20 verlaufen. Es können auch mehr als die zwei gezeigten Löcher vorgesehen sein. Die innere Kammer 24 ist mit einer Druckluftquelle verbunden, mittels derer die Innenfläche der Hülse 15 zum leichteren Abnehmen des Gummituchs 10 nach dessen Fertigstellung mit Druckluft beaufschlagt werden kann.In Fig. 3, a partially assembled sleeve-shaped blanket 10 is shown on a production cylinder 20. The blanket 10 already comprises a sleeve base 15 and a compressible layer 14. An isotropic, sleeve-shaped reinforcing layer 13 is connected via a at one end 21 of the manufacturing cylinder 20 z. B. pushed by means of a screw assembly Dornaufsatz or mandrel 30 pushed. In the cylinder 20, air holes 22 and 23 are formed, which extend from an inner chamber 24 of the production cylinder 20 to the outer surface of the cylinder 20. It may also be provided more than the two holes shown. The inner chamber 24 is connected to a compressed air source, by means of which the inner surface of the sleeve 15 can be applied to facilitate removal of the blanket 10 after its completion with compressed air.

Der Dornaufsatz 30 umfasst eine Einströmöffnung 32, einen sich in Umfangsrichtung erstreckenden Luftspalt 35 und Ausströmöffnungen 33 und 34. Die Einströmöffnung 32 ist z. B. mittels einer Röhre oder eines flexiblen Schlauches mit der Druckluftquelle verbindbar. Der Außendurchmesser des Dornaufsatzes 30 entspricht im Wesentlichen dem Außendurchmesser der komprimierbaren Schicht 14 und dem Innendurchmesser der hülsenförmigen Verstärkungsschicht 13. Zur Herstellung des Gummituchs 10 wird die Verstärkungsschicht 13, unterstützt durch die aus den Ausströmöffnungen 33 und 34 ausströmende Luft, axial in die durch den Pfeil 40 angezeigte Richtung über den Dornaufsatz aufgeschoben. Es können auch weitere Ausströmöffnungen vorgesehen sein. Sobald sich die Verstärkungsschicht 13 über der komprimierbaren Schicht befindet, zieht sie sich wieder zusammen, so dass sie reibschlüssig mit der komprimierbaren Schicht 14 verbunden ist. Diese Reibschlüssigkeit der Verstärkungsschicht 13 kann zusätzlich durch einen Klebstoff, insbesondere Klebezement auf der Außenoberfläche der komprimierbaren Schicht 14 oder der Innenfläche der Verstärkungsschicht 14 bzw. an beiden Flächen unterstützt werden.The mandrel attachment 30 comprises an inflow opening 32, a circumferentially extending air gap 35 and outflow openings 33 and 34. The inflow opening 32 is z. B. by means of a tube or a flexible hose to the compressed air source connectable. The outer diameter of the mandrel attachment 30 substantially corresponds to the outer diameter of the compressible layer 14 and the inner diameter of the sleeve-shaped reinforcing layer 13. For the production of the blanket 10, the reinforcing layer 13, supported by the air flowing out of the outflow openings 33 and 34, axially into the by the arrow 40 indicated direction pushed over the spine attachment. It can also be provided more outflow openings. Once the reinforcing layer 13 is above the compressible layer, it contracts again so that it is frictionally connected to the compressible layer 14. This frictional engagement of the reinforcing layer 13 can additionally be assisted by an adhesive, in particular adhesive cement, on the outer surface of the compressible layer 14 or the inner surface of the reinforcing layer 14 or on both surfaces.

Anschließend kann die druckende Schicht auf die Verstärkungsschicht 13 aufgebracht werden, z. B. durch Vulkanisieren von Gummi.Subsequently, the printing layer can be applied to the reinforcing layer 13, for. B. by vulcanization of rubber.

In Fig. 4 ist ein möglicher Aufbau der isotropen, hülsenförmigen Verstärkungsschicht 3 gezeigt. Die hülsenförmige Verstärkungsschicht 3 kann hergestellt werden, indem ein erster Streifen 40 einer (durch die gestrichelte Linie angedeutete) Polyesterfolie spiralförmig in der Weise um den Zylinder gewickelt wird, dass die Kanten aneinander grenzen. Ein zweiter Streifen 42 eines Polyesterfilms wird dann in der Weise ebenfalls spiralförmig über den ersten Streifen 40 gewickelt, dass die Kanten des ersten Streifens 40 bedeckt sind. Zwischen den beiden Streifen 40 und 42 und den aneinander grenzenden Kanten ist vorzugsweise ein Polyesterharz-Klebstoff aufgebracht, so dass eine einheitliche, isotrope Polyesterhülse gebildet wird. Anschließend können die Kanten vorzugsweise quadratisch beschnitten werden, so dass die hülsenförmige Schicht 3 entsteht. Aufgrund ihrer Isotropie und den thermoplastischen Eigenschaften des Materials, aus dem sie gefertigt ist, bietet die hülsenförmige Schicht 3 eine hervorragende radiale und axiale Stabilität. Die Elastizität des Materials bewegt sich vorzugsweise im Bereich zwischen etwa 689.475.729,317 Pa und 6.894.757.293,17 Pa (100,000 und 1,000,000 psi), insbesondere zwischen 3.447.378.646,58 Pa und 6.894.757.293,17 Pa (500,000 und 1,000,000 psi).4, a possible construction of the isotropic, sleeve-shaped reinforcing layer 3 is shown. The sleeve-shaped reinforcing layer 3 can be produced by spirally winding a first strip 40 of a polyester film (indicated by the dashed line) around the cylinder in such a manner that the edges adjoin one another. A second strip 42 of polyester film is then also spirally wound over the first strip 40 such that the edges of the first strip 40 are covered. Between the two strips 40 and 42 and the adjacent edges, a polyester resin adhesive is preferably applied, so that a uniform, isotropic polyester sleeve is formed. Subsequently, the edges can be preferably cut square, so that the sleeve-shaped layer 3 is formed. Due to its isotropy and the thermoplastic properties of the material of which it is made, the sleeve-shaped layer 3 provides excellent radial and axial Stability. The elasticity of the material preferably ranges between about 689,475,729,317 Pa and 6,894,757,293.17 Pa (100,000 and 1,000,000 psi), especially between 3,447,378,646.58 Pa and 6,894,757,293.17 Pa (500,000 and 1,000,000 psi). ,

Die thermoplastische hülsenförmige Schicht kann allerdings auch aus einem gespritzten oder stranggepressten oder extrudierten Material bestehen, das hülsenartig geformt wurde.However, the thermoplastic sleeve-shaped layer can also consist of a sprayed or extruded or extruded material which has been shaped like a sleeve.

Liste der BezugszeichenList of reference numbers

11
hulsenformiges Gummituchhulsenformiges blanket
22
druckende Schichtprinting layer
33
Verstärkungsschichtreinforcing layer
44
komprimierbare Schichtcompressible layer
55
Hülsenbasissleeve base
66
Fadenthread
1010
hülsenförmiges Gummituchsleeve-shaped blanket
1313
Verstärkungsschichtreinforcing layer
1414
komprimierbare Schichtcompressible layer
1515
Hülsenbasissleeve base
2020
Fertigungszylindermanufacturing cylinder
2121
EndeThe End
2222
Luftlochair pocket
2323
Luftlochair pocket
3030
Spanndornmandrel
3232
Einströmöffnunginflow
3333
Austrittsöffnungoutlet opening
3434
Austrittsöffnungoutlet opening
3535
Luftspaltair gap
4040
axiale Richtungaxial direction
4040
Polyesterstreifenpolyester strips
4242
Polyesterstreifenpolyester strips

Claims (18)

  1. Sleeve-like printing blanket (1) having a sleeve-like printing layer (2), a sleeve-like reinforcing layer (3, 13) arranged under the printing layer (2), a compressible layer arranged under the reinforcing layer (3, 13), and a sleeve base (5, 15), to which the compressible layer (4, 14) is applied, characterized in that the reinforcing layer is an isotropic layer.
  2. Printing blanket according to Claim 1, characterized in that the reinforcing layer (3, 13) is formed from a polyester material.
  3. Printing blanket according to Claim 2, characterized in that the reinforcing layer (3, 13) is formed from MYLAR® or MELENEX® .
  4. Printing blanket according to one of Claims 1 to 3, characterized in that the reinforcing layer (3, 13) consists of a homogeneous film and an adhesive, the adhesive consisting of the same material as the homogeneous film.
  5. Printing blanket according to one of Claims 1 to 4, characterized in that the reinforcing layer (3, 13) has two spirally wound strips of polyester film.
  6. Printing blanket (1) according to one of the preceding claims, characterized in that the reinforcing layer has an elasticity of between about 689 475 729.317 and 6 894 757 293.17 Pa (100 000 and 1 000.000 psi).
  7. Printing blanket according to one of the preceding claims, characterized in that the reinforcing layer (3, 13) is formed from a thermoplastic material.
  8. Printing blanket according to Claim 6 or 7, characterized in that the elasticity is between 3 447 378 646.58 Pa and 6 894 757 293.17 Pa.
  9. Printing blanket according to one of the preceding claims, characterized in that, furthermore, an intermediate layer is arranged between the compressible layer (4, 14) and the sleeve base (5, 15).
  10. Process for the production of a sleeve-like printing blanket according to one of the preceding claims, characterized by the following process steps:
    producing a sleeve-like reinforcing layer (3, 13) from an isotropic material,
    pulling the sleeve-like reinforcing layer (3, 13) axially over a compressible layer (4, 14), and applying a printing layer (2) directly over the reinforcing layer (3, 13).
  11. Process according to Claim 10, characterized in that the sleeve-like reinforcing layer (3, 13) is formed from a thermoplastic material.
  12. Process according to Claim 10, characterized in that the sleeve-like reinforcing layer (3, 13) is formed from a polyester film.
  13. Process according to Claim 10, characterized in that the sleeve-like reinforcing layer (3, 13) is formed from MYLAR® or MELENEX® .
  14. Process according to Claim 10, characterized in that compressed air is applied to the inner side of the reinforcing layer (3, 13) as it is pulled on.
  15. Process according to Claim 10, characterized in that the reinforcing layer (3, 13) is pulled over a clamping mandrel (30).
  16. Process according to Claim 10, characterized in that the elasticity of the reinforcing layer (3, 13) is between about 689 475 729.317 Pa and 6 894 757 293.17 Pa (100 000 and 1 000 000 psi).
  17. Process according to Claim 10, characterized in the production of the reinforcing layer (3, 13) is carried out by winding on a thermoplastic film spirally.
  18. Process according to Claim 10, characterized in that the production of the reinforcing layer (3, 13) is carried out by means of spraying or extruding a tube of thermoplastic material.
EP00125256A 1999-12-21 2000-11-24 Printing blanket with isotropic reinforcing layer Expired - Lifetime EP1110748B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/469,114 US6389965B1 (en) 1999-12-21 1999-12-21 Tubular printing blanket with tubular isotropic reinforcing layer
US469114 1999-12-21

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EP1110748A1 EP1110748A1 (en) 2001-06-27
EP1110748B1 true EP1110748B1 (en) 2006-06-28

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EP (1) EP1110748B1 (en)
JP (1) JP2001180147A (en)
AT (1) ATE331635T1 (en)
DE (2) DE10058421A1 (en)

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DE10058421A1 (en) 2001-07-05
DE50013087D1 (en) 2006-08-10
US6389965B1 (en) 2002-05-21
JP2001180147A (en) 2001-07-03
EP1110748A1 (en) 2001-06-27
US20020073859A1 (en) 2002-06-20
US6705225B2 (en) 2004-03-16
ATE331635T1 (en) 2006-07-15

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