EP1264708B1 - Method for producing a chemical resistant protective layer for a rotary body comprising a fibrous reinforcement and a rotary body - Google Patents

Method for producing a chemical resistant protective layer for a rotary body comprising a fibrous reinforcement and a rotary body Download PDF

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Publication number
EP1264708B1
EP1264708B1 EP02012208A EP02012208A EP1264708B1 EP 1264708 B1 EP1264708 B1 EP 1264708B1 EP 02012208 A EP02012208 A EP 02012208A EP 02012208 A EP02012208 A EP 02012208A EP 1264708 B1 EP1264708 B1 EP 1264708B1
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EP
European Patent Office
Prior art keywords
layer
rotary body
coating
hard rubber
metal
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EP02012208A
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German (de)
French (fr)
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EP1264708A2 (en
EP1264708A3 (en
Inventor
Gerhard Dr. Johner
Markus Kirst
Martin Endisch
Josef Singler
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Manroland AG
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Manroland AG
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
    • 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
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • 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
    • B41N2207/02—Top 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
    • B41N2207/04—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
    • B41N2207/10—Location or type of the layers in shells for rollers of printing machines characterised by inorganic compounds, e.g. pigments
    • 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
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article
    • Y10T428/1393—Multilayer [continuous layer]

Definitions

  • the invention relates to a method for producing a chemical-resistant protective layer for a rotary body having a base body of fiber-reinforced plastic according to claim 1 and a rotary body having a layer structure according to claim 6.
  • roller body made of fiber-reinforced, in particular carbon fiber reinforced plastic.
  • roller bodies for printing machines such as dampening rollers, ink rollers, plate cylinders, blanket cylinders, also for the sleeve technique, etc.
  • Printing auxiliaries are, for example, paints, dampening solutions, detergents and all substances which come into contact with the roll surfaces.
  • any fiber-reinforced material can only maintain its property profile if the matrix does not lose its adhesion to the fibers and there are no dimensional changes in the form of swelling or shrinking. Particularly feared is z.
  • the so-called delamination is connected as a result of the water absorption of the plastic matrix, with a dramatic decline in strength.
  • Coatings of fiber-reinforced plastics are known, in particular by thermal spraying, whereby the problem of adhesion promotion is given the greatest attention (see, for example, the DE 36 17 034 C2 or the DE 36 08 286 A1 ), while the chemical resistance of the coatings to protect the body so far at best imprecise or not treated.
  • the EP 0 514 640 B1 describes a process for coating fiber-reinforced plastic bodies by means of thermal spraying using an intermediate layer of thermosetting or thermoplastic resin dispersed with ceramic particles and ground after curing to provide for the actual functional layer of metal or ceramic plastic-free adhesion points of the same material.
  • the invention is therefore based on the object to produce a chemical-resistant protective layer of fiber-reinforced plastic bodies and to provide a rotary body with a base made of fiber reinforced plastic and such a protective layer, so that not only the protection of the body is guaranteed, but also a strong bond is given to an overlying, preferably applied by thermal spraying, wear and corrosion resistant functional layer.
  • the object underlying the invention is achieved by the features of method claim 1 and by the characterizing features of claim 8, ie the fact that the protected fiber-reinforced plastic component, the main body of a rotating body, is first protected with a layer of hard rubber, in the metal - or ceramic particles are dispersed with a dispersion content of 5 vol .-% - 80 vol .-%, these are ground and then the hard rubber layer with a metal and / or ceramic layer, preferably by thermal spraying, is coated.
  • the chemical-resistant intermediate layer made of hard rubber can be applied in a thickness of 160 ⁇ m up to 10000 ⁇ m, preferably from 500 ⁇ m up to 1000 ⁇ m, with NBR rubber coverings with 40 ° -80 ° Shore D, preferably 80 ° Shore D, for classic offset applications. be used advantageously.
  • EPDM rubber coverings of the same thickness or Shore hardness are particularly suitable for offset applications using UV-curing inks.
  • the metal or ceramic particles must be mixed in before the vulcanization in water vapor at 140 ° C - 160 ° C, for example by rolling or kneading.
  • the chemical-resistant intermediate layer ie the hard rubber coating, must be sanded until the dispersed metal or ceramic particles are also ground on the surface.
  • metal or ceramic particles are used suitably commercial spray powder, as it is used for thermal spraying.
  • the further coating of the fiber-reinforced plastic body provided with the sanded intermediate layer of hard rubber is preferably carried out depending on the intended use (as a dampening, color, conductive, tensile, weaving, or derusting roller, etc.), preferably by thermal spraying of suitable materials, such as e.g. Oxide ceramic on high-alloy chromium / nickel steel adhesive layer for dampening roller application or wear-resistant hard coating (WC / Co, WC / Ni Cr3C2 / NiCr, NiCrBSi) with guide roller application.
  • suitable materials such as e.g. Oxide ceramic on high-alloy chromium / nickel steel adhesive layer for dampening roller application or wear-resistant hard coating (WC / Co, WC / Ni Cr3C2 / NiCr, NiCrBSi) with guide roller application.
  • a pressure-functional functional layer by plasma spraying of high-alloy chromium nickel steel and subsequently applied by oxide ceramics, which is smoothed by grinding, polishing, brushing or scrubbing up to a roughness of Rz ⁇ 3.0 microns to the ground hard coating also preferably used as a dampening roller surface.
  • the functional layer of the fiber-reinforced plastic body protected with the ground intermediate layer can also be effected by other comparatively cold coating methods such as electroplating, chemical deposition, cathodic sputtering (PVD), sol-gel, etc., whereby chromium, nickel, copper, oxide ceramics or combinations thereof are deposited.
  • PVD cathodic sputtering
  • the result of this method is a rotary body with a base made of fiber-reinforced, in particular carbon fiber-reinforced plastic with a chemical-resistant intermediate layer of hard rubber applied thereto, which has a metal or ceramic dispersion content of 5% by volume to 80% by volume. and is covered with a particular Druckischen functional layer of metal and / or ceramic.
  • the rotary body can also be a printing-plastic sleeve (sleeve), which is provided with the inventively prepared chemical-resistant protective coating, and are mounted on a plate cylinder or blanket cylinder.
  • sleeve printing-plastic sleeve
  • the rotation body according to the invention may also be a screen ink roller, in which case the surface of the chemical-resistant protective layer consists of laser-scanned chromium oxide and thus fulfills the function of a screen inking roller for short inking units in offset, gravure and flexographic printing machines.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung einer chemikalienbeständigen Schutzschicht für einen Rotationskörper mit einem Grundkörper aus faserverstärktem Kunststoff gemäss Anspruch 1 und einen Rotationskörper mit einem Schichtaufbau gemäss Anspruch 6.The invention relates to a method for producing a chemical-resistant protective layer for a rotary body having a base body of fiber-reinforced plastic according to claim 1 and a rotary body having a layer structure according to claim 6.

Bekanntlich können durch die Verwendung von faserverstärkten Kunststoffen im Maschinen-, Fahrzeug- und Anlagenbau erhebliche Vorteile erzielt werden. Sie sind leichter als Metalle und haben bei entsprechender Auslegung mindestens gleichwertige mechanische Eigenschaften, insbesondere bei Verwendung für schnell bewegte Teile wie Wellen, Walzen oder ähnliches.As is known, considerable advantages can be achieved through the use of fiber-reinforced plastics in machine, vehicle and plant construction. They are lighter than metals and with appropriate design have at least equivalent mechanical properties, especially when used for fast moving parts such as shafts, rollers or the like.

Aus Metall hergestellte, schnelldrehende Rotations-, bzw. Walzenkörper von Druckmaschinen sind bekanntlich massenbedingt erheblichen Trägheitskräften ausgesetzt, die besonders bei sich ändernden Maschinengeschwindigkeiten von Nachteil sind. Man verwendet deshalb heute bereits Walzenkörper aus faserverstärktem, insbesondere kohlenstofffaserverstärktem Kunststoff.Metal-made, high-speed rotary or roller bodies of printing presses are known to be exposed to considerable inertial forces due to the mass, which are disadvantageous in particular with changing machine speeds. It is therefore already used today roller body made of fiber-reinforced, in particular carbon fiber reinforced plastic.

Ohne eine chemikalienbeständige, korrosionsfeste Beschichtung werden beispielsweise solche Walzenkörper für Druckmaschinen, wie Feuchtwalzen, Farbwalzen, Plattenzylindern, Gummituchzylindern, auch für die Sleevetechnik etc., rasch durch Wechselwirkung mit Druckhilfsstoffen geschädigt. Druckhilfsstoffe sind z.B. Farben, Feuchtmittel, Waschmittel und alle Stoffe, die in Kontakt mit den Walzenoberflächen kommen.Without a chemical-resistant, corrosion-resistant coating, for example, such roller bodies for printing machines, such as dampening rollers, ink rollers, plate cylinders, blanket cylinders, also for the sleeve technique, etc., are rapidly damaged by interaction with printing auxiliaries. Printing auxiliaries are, for example, paints, dampening solutions, detergents and all substances which come into contact with the roll surfaces.

Grundsätzlich kann jeder faserverstärkte Werkstoff sein Eigenschaftsprofil nur halten, wenn die Matrix ihre Haftung zu den Fasern nicht verliert und keine Dimensionsveränderungen in Form von Quellen oder Schrumpfen auftreten. Besonders gefürchtet ist z. B. bei faserverstärkten Kunststoffen die sog. Delamination als Folge der Wasseraufnahme der Kunststoffmatrix verbunden, mit dramatischem Festigkeitsverfall.In principle, any fiber-reinforced material can only maintain its property profile if the matrix does not lose its adhesion to the fibers and there are no dimensional changes in the form of swelling or shrinking. Particularly feared is z. For example, in fiber-reinforced plastics, the so-called delamination is connected as a result of the water absorption of the plastic matrix, with a dramatic decline in strength.

Beschichtungen von faserverstärkten Kunststoffen sind bekannt, insbesondere durch thermisches Spritzen, wobei der Problematik der Haftvermittlung größte Aufmerksamkeit gewidmet wird (siehe bspw. die DE 36 17 034 C2 oder die DE 36 08 286 A1 ), während die chemische Beständigkeit der Beschichtungen zum Schutz des Grundkörpers bisher bestenfalls unpräzise oder gar nicht behandelt wird.Coatings of fiber-reinforced plastics are known, in particular by thermal spraying, whereby the problem of adhesion promotion is given the greatest attention (see, for example, the DE 36 17 034 C2 or the DE 36 08 286 A1 ), while the chemical resistance of the coatings to protect the body so far at best imprecise or not treated.

In der DE 42 04 896 C2 ist ebenfalls die Beschichtung eines hitzeempfindlichen Grundkörpers aus faserverstärktem Epoxidharz durch Plasmaspritzen für eine verschleißfeste, chemisch resistente, anorganische Deckschicht, bzw. angelöste Kunststoffschicht beschrieben, wobei eine vorher aufgetragene Thermoplastschicht bzw. angelöste Kunststoffschicht die Haftung für die Haftvermittlerschicht bietet. Die bekannten extremen Abkühlraten der Spritzpartikel beim thermischen Spritzen von 105- 106 K/s führen gerade in Verbindung mit den für faserverstärkte Kunststoffe notwendigen Kühlmaßnahmen, wie flüssig CO2 -Kühlung etc., kaum zu dem gewünschten haftungsfördernden Effekt, dass Spritzpartikel in die Thermoplastschicht vollständig eingebunden werden.In the DE 42 04 896 C2 The coating of a heat-sensitive base made of fiber-reinforced epoxy resin is also described by plasma spraying for a wear-resistant, chemically resistant, inorganic cover layer or loosened plastic layer, wherein a previously applied thermoplastic layer or loosened plastic layer provides the adhesion for the adhesion promoter layer. The known extreme cooling rates of the spray particles during thermal spraying of 10 5 - 10 6 K / s lead just in combination with the cooling measures necessary for fiber reinforced plastics, such as liquid CO 2 cooling, etc., hardly to the desired adhesion-promoting effect that spray particles in the Thermoplastic layer are completely involved.

Insbesondere auch die EP 0 514 640 B1 beschreibt ein Verfahren zur Beschichtung von faserverstärkten Kunststoffkörpern mittels thermischer Spritzverfahren unter Verwendung einer Zwischenschicht aus duroplastischem oder thermoplastischem Kunststoffharz, die mit Keramikpartikeln dispergiert ist und nach dem Aushärten angeschliffen wird, um für die eigentliche Funktionsschicht aus Metall oder Keramik kunststofffreie Haftpunkte aus gleichem Werkstoff zu bieten. Die unzureichende chemische Beständigkeit einer derartigen Zwischenschicht aus Kunststoffharz und die fatalen Folgen für den faserverstärkten Kunststoffgrundkörper bei Kontakt mit Chemikalien wie bspw. Druckhilfsstoffe sind nicht beschrieben.In particular, the EP 0 514 640 B1 describes a process for coating fiber-reinforced plastic bodies by means of thermal spraying using an intermediate layer of thermosetting or thermoplastic resin dispersed with ceramic particles and ground after curing to provide for the actual functional layer of metal or ceramic plastic-free adhesion points of the same material. The insufficient chemical resistance of such an intermediate layer of plastic resin and the fatal consequences for the fiber-reinforced plastic base body in contact with chemicals such as. Printing auxiliaries are not described.

Der Erfindung liegt daher die Aufgabe zugrunde, eine chemikalienbeständige Schutzschicht von faserverstärkten Kunststoffkörpern herzustellen und einen Rotationskörper mit einem Grundkörper aus faserverstärktem Kunststoff und einer derartigen Schutzschicht zur Verfügung zu stellen, so dass nicht nur der Schutz des Grundkörpers gewährleistet ist, sondern auch noch eine haftfeste Verbindung zu einer darüberliegenden, vorzugsweise durch thermisches Spritzen aufzubringende, verschleiß- und korrosionsfesten Funktionsschicht gegeben ist.The invention is therefore based on the object to produce a chemical-resistant protective layer of fiber-reinforced plastic bodies and to provide a rotary body with a base made of fiber reinforced plastic and such a protective layer, so that not only the protection of the body is guaranteed, but also a strong bond is given to an overlying, preferably applied by thermal spraying, wear and corrosion resistant functional layer.

Die der Erfindung zugrunde liegende Aufgabe wird durch die Merkmale des Verfahrensanspruchs 1 und durch die kennzeichnenden Merkmale des Anspruchs 8 gelöst, also dadurch, dass die zu schützende faserverstärkte Kunststoffkomponente, der Grundkörper eines Rotationskörpers, zuerst mit einer Schicht aus Hartgummi geschützt wird, in die Metall- oder Keramikpartikel mit einem Dispersionsanteil von 5 Vol.-% - 80 Vol.-% eindispergiert sind, diese angeschliffen werden und danach die Schicht aus Hartgummi mit einer Metall- und / oder Keramikschicht, vorzugsweise durch thermisches Spritzen, beschichtet wird.The object underlying the invention is achieved by the features of method claim 1 and by the characterizing features of claim 8, ie the fact that the protected fiber-reinforced plastic component, the main body of a rotating body, is first protected with a layer of hard rubber, in the metal - or ceramic particles are dispersed with a dispersion content of 5 vol .-% - 80 vol .-%, these are ground and then the hard rubber layer with a metal and / or ceramic layer, preferably by thermal spraying, is coated.

Die chemikalienbeständige Zwischenschicht aus Hartgummi kann in einer Dicke von 160 µm bis zu 10000 µm, vorzugsweise von 500 µm bis zu 1000 µm aufgetragen werden, wobei für klassische Offsetanwendungen NBR-Kautschukbezüge mit 40° - 80° Shore D, vorzugsweise 80° Shore D, vorteilhaft eingesetzt werden.The chemical-resistant intermediate layer made of hard rubber can be applied in a thickness of 160 μm up to 10000 μm, preferably from 500 μm up to 1000 μm, with NBR rubber coverings with 40 ° -80 ° Shore D, preferably 80 ° Shore D, for classic offset applications. be used advantageously.

EPDM-Kautschukbezüge mit gleicher Dicke bzw. Shore-Härte eignen sich besonders bei Offsetanwendungen unter Verwendung UV-härtender Farben. Im Fall der Gummibeschichtung der Gummimasse müssen vor der Vulkanisation in Wasserdampf bei 140°C - 160°C die Metall- oder Keramikpartikel eingemischt werden, z.B. durch Einwalzen oder Einkneten.EPDM rubber coverings of the same thickness or Shore hardness are particularly suitable for offset applications using UV-curing inks. In the case of the rubber coating of the rubber mass, the metal or ceramic particles must be mixed in before the vulcanization in water vapor at 140 ° C - 160 ° C, for example by rolling or kneading.

Die chemikalienbeständige Zwischenschicht, also die Beschichtung aus Hartgummi muss angeschliffen werden, bis die eindispergierten Metall- oder Keramikpartikel ebenfalls angeschliffen an der Oberfläche zu sehen sind. Als Metall- oder Keramikpartikel verwendet man zweckmäßig handelsübliches Spritzpulver, wie es zum thermischen Spritzen verwendet wird.The chemical-resistant intermediate layer, ie the hard rubber coating, must be sanded until the dispersed metal or ceramic particles are also ground on the surface. As metal or ceramic particles are used suitably commercial spray powder, as it is used for thermal spraying.

Die weitere Beschichtung des mit der angeschliffenen Zwischenschicht aus Hartgummi versehenen faserverstärkten Kunststoffkörpers erfolgt bevorzugt abhängig vom Einsatzzweck (als Feucht-, Farb-, Leit-, Zug-, Webbaum-, oder Ableitwalze etc.) vorzugsweise durch thermisches Spritzen geeigneter Werkstoffe wie z.B. Oxidkeramik auf hochlegierter Chrom/Nickelstahl-Haftschicht für Feuchtwalzenanwendung oder verschleißfester Hartstoffschicht ( WC/Co, WC/Ni Cr3C2/NiCr, NiCrBSi) bei Leitwalzenanwendung. In besonders bevorzugter Weise wird auf die angeschliffene Beschichtung aus Hartgummi eine drucktechnische Funktionsschicht durch Plasmaspritzen von hochlegiertem Chromnickelstahl und nachfolgend von Oxidkeramik aufgebracht, die durch Schleifen, Polieren, Bürsten oder Scheuern bis hin zu einer Rauhigkeit von Rz ≤ 3,0 µm geglättet wird, um ebenfalls bevorzugt als Feuchtwalzenoberfläche eingesetzt zu werden.The further coating of the fiber-reinforced plastic body provided with the sanded intermediate layer of hard rubber is preferably carried out depending on the intended use (as a dampening, color, conductive, tensile, weaving, or derusting roller, etc.), preferably by thermal spraying of suitable materials, such as e.g. Oxide ceramic on high-alloy chromium / nickel steel adhesive layer for dampening roller application or wear-resistant hard coating (WC / Co, WC / Ni Cr3C2 / NiCr, NiCrBSi) with guide roller application. In a particularly preferred manner, a pressure-functional functional layer by plasma spraying of high-alloy chromium nickel steel and subsequently applied by oxide ceramics, which is smoothed by grinding, polishing, brushing or scrubbing up to a roughness of Rz ≤ 3.0 microns to the ground hard coating also preferably used as a dampening roller surface.

Die Beschichtung, d.h. die Funktionsschicht des mit der angeschliffenen Zwischenschicht geschützten faserverstärkten Kunststoffkörpers kann selbstverständlich auch durch andere vergleichsweise kalte Beschichtungsverfahren wie Galvanik, chemische Abscheidung, Kathodenzerstäubung (PVD), Sol-Gel etc. erfolgen, wobei Chrom, Nickel, Kupfer, Oxidkeramik oder Kombinationen daraus abgeschieden werden.The coating, i. Of course, the functional layer of the fiber-reinforced plastic body protected with the ground intermediate layer can also be effected by other comparatively cold coating methods such as electroplating, chemical deposition, cathodic sputtering (PVD), sol-gel, etc., whereby chromium, nickel, copper, oxide ceramics or combinations thereof are deposited.

Das Resultat dieses Verfahrens ist ein Rotationskörper mit einem Grundkörper aus faserverstärktem, insbesondere kohlestofffaserverstärktem Kunststoff mit einer darauf aufgebrachten chemikalienbeständigen Zwischenschicht aus Hartgummi, die einen Metall- oder Keramikdispersionsanteil von 5 Vol.-% - 80 Vol.-% aufweist und mit einer insbesonderen drucktechnischen Funktionsschicht aus Metall und/oder Keramik bedeckt ist.The result of this method is a rotary body with a base made of fiber-reinforced, in particular carbon fiber-reinforced plastic with a chemical-resistant intermediate layer of hard rubber applied thereto, which has a metal or ceramic dispersion content of 5% by volume to 80% by volume. and is covered with a particular Drucktechnischen functional layer of metal and / or ceramic.

Selbstverständlich kann der Rotationskörper auch eine drucktechnische Kunststoffhülse (Sleeve) sein, die mit der erfindungsgemäß hergestellten chemikalienbeständigen Schutzbeschichtung versehen ist, und so auf einen Plattenzylinder oder Gummizylinder aufgezogen werden.Of course, the rotary body can also be a printing-plastic sleeve (sleeve), which is provided with the inventively prepared chemical-resistant protective coating, and are mounted on a plate cylinder or blanket cylinder.

Der erfindungsgemäße Rotationskörper kann auch eine Rasterfarbwalze sein, wobei dann die Oberfläche der chemikalienbeständigen Schutzschicht aus lasergerasterten Chromoxid besteht und so die Funktion einer Rasterfarbwalze für Kurzfarbwerke in Offset-, Tiefdruck- und Flexodruckmaschinen erfüllt.The rotation body according to the invention may also be a screen ink roller, in which case the surface of the chemical-resistant protective layer consists of laser-scanned chromium oxide and thus fulfills the function of a screen inking roller for short inking units in offset, gravure and flexographic printing machines.

Claims (8)

  1. A method for producing a chemical-resistant protective layer for a rotary body having a base body of fibre-reinforced plastics material, in particular for roller bodies of a printing machine, in which first of all a coating of hard rubber having a metal or ceramic-material dispersion content of 5 vol% volume - 80 vol% in a thickness between 150 µm and 1 cm is effected on the base body of fibre-reinforced plastics material which thereupon is partially ground in order to expose the metal or ceramic-material particles dispersed therein, and afterwards in a further step a functional layer of metal and/or ceramic material is put on the surface of the coating of hard rubber containing the partially ground dispersion particles, or a hard-material layer protecting against wear, of, for example, WC/Co, WC/Ni, Cr3C2/NiCr, NiCrBSi, or Mo, is applied to the partially ground coating of hard rubber and subsequently is smoothed in accordance with the use of the rotary body.
  2. A method according to claim 1, characterised in that the functional layer is put on by thermal spraying.
  3. A method according to claim 1, characterised in that the coating of hard rubber is effected with the use of NBR or EPDM rubber masses with a metal or ceramic-material dispersion in such a way that a hardness of 40° Shore D to 80° Shore D is achieved.
  4. A method according to one of the preceding claims 1 to 3, characterised in that a layer having a printing function is put on the partially ground coating of hard rubber by thermally spraying high-alloy chromium-nickel steel and subsequently oxide ceramic material, and is smoothed by grinding and polishing to a roughness of Rz ≤ 3.0 µm.
  5. A method according to claim 1, characterised in that a functional layer of, for example, chromium, nickel, copper, oxide ceramic material or combinations thereof is deposited on the partially ground coating of hard rubber by cathode sputtering (PVD), chemical deposition, electroplating, plasma CVD, sol/gel or similarly cold coating methods.
  6. A rotary body such as, for example, a sleeve with a base body of fibre-reinforced plastics material having a chemical-resistant intermediate layer of hard rubber applied to a thickness between 150 µm and 1 cm and has a metal or ceramic-material dispersion content of 5 vol% - 80 vol% and is covered with a functional, in particular a print-functional, layer of metal and/or ceramic material, characterised in that a hard-material layer, protecting against wear, of, for example, WC/Co, WC/Ni, Cr3C2/NiCr, NiCrBSi, or Mo, is applied to the partially ground coating of hard rubber and is smoothed in accordance with the use of the rotary body.
  7. A rotary body according to claim 6, characterised in that the hard-material layer is applied by thermal spraying.
  8. A rotary body according to claim 6 or 7, characterised in that the functional layer is put on by plasma spraying high-alloy chromium-nickel steel and subsequently oxide ceramic material and is smoothed by grinding and polishing to a roughness of Rz ≤ 3.0 µm.
EP02012208A 2001-06-08 2002-06-04 Method for producing a chemical resistant protective layer for a rotary body comprising a fibrous reinforcement and a rotary body Expired - Lifetime EP1264708B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10127908A DE10127908A1 (en) 2001-06-08 2001-06-08 Process for producing a chemical-resistant protective layer for rotating bodies with a base body made of fiber-reinforced plastic and other rotating bodies
DE10127908 2001-06-08

Publications (3)

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EP1264708A2 EP1264708A2 (en) 2002-12-11
EP1264708A3 EP1264708A3 (en) 2004-04-21
EP1264708B1 true EP1264708B1 (en) 2008-07-30

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US (1) US6797331B2 (en)
EP (1) EP1264708B1 (en)
DE (2) DE10127908A1 (en)

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DE102008012308A1 (en) * 2008-03-04 2009-09-24 Coatec Gesellschaft für Oberflächenveredelung mbH Coating of a body made of steel or CFRP material and method for producing such a coating
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DE10127908A1 (en) 2002-12-19
US20020187292A1 (en) 2002-12-12
EP1264708A2 (en) 2002-12-11
EP1264708A3 (en) 2004-04-21
US6797331B2 (en) 2004-09-28
DE50212557D1 (en) 2008-09-11

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