EP1264708A2 - 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
EP1264708A2
EP1264708A2 EP02012208A EP02012208A EP1264708A2 EP 1264708 A2 EP1264708 A2 EP 1264708A2 EP 02012208 A EP02012208 A EP 02012208A EP 02012208 A EP02012208 A EP 02012208A EP 1264708 A2 EP1264708 A2 EP 1264708A2
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EP
European Patent Office
Prior art keywords
coating
thermoplastic
ceramic
metal
rotary body
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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.)
Granted
Application number
EP02012208A
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German (de)
French (fr)
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EP1264708A3 (en
EP1264708B1 (en
Inventor
Gerhard Dr. Johner
Markus Kirst
Martin Endisch
Josef Singler
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Manroland AG
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MAN Roland Druckmaschinen AG
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Publication of EP1264708A2 publication Critical patent/EP1264708A2/en
Publication of EP1264708A3 publication Critical patent/EP1264708A3/en
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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 rotating body with a base made of fiber-reinforced Plastic according to claim 1 and a rotating body with a layer structure according to claim 8.
  • fiber-reinforced plastics in Mechanical, vehicle and plant engineering considerable advantages can be achieved. They are lighter than metals and at least have the appropriate design equivalent mechanical properties, especially when used for fast moving parts such as shafts, rollers or the like.
  • roller bodies are already used today fiber reinforced, especially carbon fiber reinforced plastic.
  • roller bodies for printing presses such as dampening rollers, Inking rollers, plate cylinders, blanket cylinders, also for sleeve technology etc.
  • Printing aids are e.g. Paints, fountain solutions, detergents and all substances that come into contact with the Roll surfaces come.
  • every fiber-reinforced material can only maintain its property profile, if the matrix does not lose its adhesion to the fibers and none Dimensional changes in the form of sources or shrinkage occur. Z is particularly feared.
  • Coatings of fiber-reinforced plastics are known, in particular by thermal spraying, whereby the problem of adhesion mediation is greatest Attention is paid (see, for example, DE 36 17 034 C2 or DE 36 08 286 A1), while the chemical resistance of the coatings to protect the Base body has so far been treated at best imprecisely or not at all.
  • DE 42 04 896 C2 also describes the coating of a heat-sensitive base body made of fiber-reinforced epoxy resin by plasma spraying for a wear-resistant, chemically resistant, inorganic cover layer or detached plastic layer, a previously applied thermoplastic layer or detached plastic layer providing the adhesion for the adhesion promoter layer ,
  • EP 0 514 640 B1 in particular also describes a method for coating of fiber-reinforced plastic bodies using thermal spraying under Use an intermediate layer made of plastic resin, with ceramic particles is dispersed and after hardening is sanded in order for the actual Functional layer made of metal or ceramic, plastic-free adhesion points from the same Material to offer.
  • the invention is therefore based on the object of being resistant to chemicals Manufacture protective layer of fiber-reinforced plastic bodies and a Rotation body with a base made of fiber-reinforced plastic and one to provide such protective layer, so that not only the protection of the Basic body is guaranteed, but also an adhesive connection an overlying one, preferably applied by thermal spraying, wear and corrosion resistant functional layer is given.
  • the object underlying the invention is characterized by the features of Method claim 1 and by the characterizing features of claim 8 solved, that is, that the fiber-reinforced plastic component to be protected, the basic body of a rotating body, first with a layer of hard rubber or Is protected in the metal or ceramic particles with a thermoplastic Dispersion content of 5 vol .-% - 80 vol .-% are dispersed, sanded and then the layer of hard rubber or thermoplastic with a metal and / or ceramic layer, preferably coated by thermal spraying becomes.
  • the chemical-resistant intermediate layer made of hard rubber or thermoplastic can be in a thickness of 160 microns up to 10000 microns, preferably from 500 microns to 1000 microns are applied, with NBR rubber covers for classic offset applications with 40 ° - 80 ° Shore D, preferably 80 ° Shore D, can be used advantageously.
  • EPDM rubber covers with the same thickness or Shore hardness are particularly suitable in offset applications using UV-curing inks.
  • Polyamide (“nylon”) is suitable as a widely used thermoplastic for both offset applications. While in the case of thermoplastic in the form of polyamide, the manufacture of the Chemical-resistant intermediate layer in the fluidized bed process with addition of metal or ceramic particles at approx. 120 ° C - 140 ° C, in the case of Rubber coating of the rubber mass before vulcanization in water vapor 140 ° C - 160 ° C the metal or ceramic particles are mixed in, e.g. by Roll in or knead in.
  • the chemical-resistant intermediate layer i.e. the hard rubber coating or thermoplastic has to be sanded until the dispersed metal or Ceramic particles can also be seen sanded on the surface.
  • a metal or Ceramic particles are expediently used in commercially available wettable powder, such as it is used for thermal spraying.
  • suitable Materials such as Oxide ceramic on high-alloy chrome / nickel steel adhesive layer for Dampening roller application or wear-resistant hard material layer (WC / CO, WC / Ni Cr3C2 / NiCr, NiCrBSi) for guide roller application.
  • a on the ground coating of hard rubber or thermoplastic Functional printing layer by plasma spraying of high-alloy Chromium-nickel steel and subsequently applied by oxide ceramics, which by Grinding, polishing, brushing or scouring up to a roughness of Rz ⁇ 3.0 ⁇ m is smoothed to also preferably used as a dampening roller surface become.
  • the coating i.e. the functional layer of the with the sanded Interlayer protected fiber reinforced plastic body can naturally also by other comparatively cold coating processes such as electroplating, chemical deposition, cathode sputtering (PVD), sol-gel etc. take place, with chromium, nickel, copper, oxide ceramics or combinations thereof be deposited.
  • PVD cathode sputtering
  • the result of this process is a rotating body with a basic body fiber reinforced, in particular carbon fiber reinforced plastic with a chemical-resistant hard rubber intermediate layer or Thermoplastic, which has a metal or ceramic dispersion content of 5 vol .-% - 80 vol .-% has and with a particular printing technology functional layer Metal and / or ceramic is covered.
  • the rotary body can also be a printing press Be plastic sleeve (sleeve) with the manufactured according to the invention chemical-resistant protective coating is provided, and so on a Plate cylinder or rubber cylinder can be pulled up.
  • the rotary body according to the invention can also be an anilox ink roller, wherein then the surface of the chemical-resistant protective layer made of laser-screened Chromium oxide exists and so the function of an anilox roller for short inking units in Offset, gravure and flexographic printing machines fulfilled.

Abstract

Preparation of a chemically resistant protective coating for a solid of revolution with a base body comprising fiber-reinforced plastics, especially for printing press roll bodies, involving application of hard rubber or thermoplastic coating containing 5-80 vol.% of metal or ceramic to the resultant smooth base, and application of a functional layer of metal and/or plastic to the ground surface containing dispersed particles, preferably by hot spraying is new. <??>An Independent claim is included for a solid of revolution, e.g. a sleeve, with a fiber reinforced plastics base carrying a chemically resistant intermediate hard rubber or thermoplastic coating, with 5-80 vol.% of a metal- or ceramic dispersion, and coated with a metal and/or ceramic functional coating applied by a special printing technique.

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 8.The invention relates to a method for producing a chemical resistant Protective layer for a rotating body with a base made of fiber-reinforced Plastic according to claim 1 and a rotating body with a layer structure according to claim 8.

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, the use of fiber-reinforced plastics in Mechanical, vehicle and plant engineering considerable advantages can be achieved. they are lighter than metals and at least have the appropriate design 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.Made of metal, high-speed rotating or roller body by As is well known, printing presses are considerable inertial forces due to the mass exposed, especially with changing machine speeds of Disadvantage are. Therefore, roller bodies are already used today fiber reinforced, especially 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 such as roller bodies for printing presses, such as dampening rollers, Inking rollers, plate cylinders, blanket cylinders, also for sleeve technology etc., quickly damaged by interaction with printing aids. Printing aids are e.g. Paints, fountain solutions, detergents and all substances that come into contact with the Roll surfaces come.

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, every fiber-reinforced material can only maintain its property profile, if the matrix does not lose its adhesion to the fibers and none Dimensional changes in the form of sources or shrinkage occur. Z is particularly feared. B. in fiber-reinforced plastics, the so-called. Delamination as a result of the water absorption of the plastic matrix associated with 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 mediation is greatest Attention is paid (see, for example, DE 36 17 034 C2 or DE 36 08 286 A1), while the chemical resistance of the coatings to protect the Base body has so far been treated at best imprecisely or not at all.

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. angeloste 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.DE 42 04 896 C2 also describes the coating of a heat-sensitive base body made of fiber-reinforced epoxy resin by plasma spraying for a wear-resistant, chemically resistant, inorganic cover layer or detached plastic layer, a previously applied thermoplastic layer or detached plastic layer providing 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, in connection with the cooling measures necessary for fiber-reinforced plastics, such as liquid CO 2 cooling etc., hardly lead to the desired adhesion-promoting effect that spray particles in the Thermoplastic layer to be fully integrated.

Insbesondere auch die EP 0 514 640 B1 beschreibt ein Verfahren zur Beschichtung von faserverstärkten Kunststoffkörpern mittels thermischer Spritzverfahren unter Verwendung einer Zwischenschicht aus 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. EP 0 514 640 B1 in particular also describes a method for coating of fiber-reinforced plastic bodies using thermal spraying under Use an intermediate layer made of plastic resin, with ceramic particles is dispersed and after hardening is sanded in order for the actual Functional layer made of metal or ceramic, plastic-free adhesion points from the same Material to offer. The insufficient chemical resistance of such Intermediate layer made of plastic resin and the fatal consequences for the fiber-reinforced Plastic base body in contact with chemicals such as printing aids 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 of being resistant to chemicals Manufacture protective layer of fiber-reinforced plastic bodies and a Rotation body with a base made of fiber-reinforced plastic and one to provide such protective layer, so that not only the protection of the Basic body is guaranteed, but also an adhesive connection an overlying one, preferably applied by thermal spraying, wear and corrosion resistant functional layer is given.

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 oder Thermoplast 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 oder Thermoplast mit einer Metall-und / oder Keramikschicht, vorzugsweise durch thermisches Spritzen, beschichtet wird.The object underlying the invention is characterized by the features of Method claim 1 and by the characterizing features of claim 8 solved, that is, that the fiber-reinforced plastic component to be protected, the basic body of a rotating body, first with a layer of hard rubber or Is protected in the metal or ceramic particles with a thermoplastic Dispersion content of 5 vol .-% - 80 vol .-% are dispersed, sanded and then the layer of hard rubber or thermoplastic with a metal and / or ceramic layer, preferably coated by thermal spraying becomes.

Die chemikalienbeständige Zwischenschicht aus Hartgummi oder Thermoplast 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 or thermoplastic can be in a thickness of 160 microns up to 10000 microns, preferably from 500 microns to 1000 microns are applied, with NBR rubber covers for classic offset applications with 40 ° - 80 ° Shore D, preferably 80 ° Shore D, can be used advantageously.

EPDM-Kautschukbezüge mit gleicher Dicke bzw. Shore-Härte eignen sich besonders bei Offsetanwendungen unter Verwendung UV-härtender Farben. Polyamid ("Nylon") eignet sich als weitverbreiteter Thermoplast für beide Offsetanwendungen. Während im Fall von Thermoplast in Form von Polyamid die Herstellung der chemikalienbeständigen Zwischenschicht im Fluidized-Bed-Verfahren unter Zugabe von Metall- oder Keramikpartikeln bei ca. 120°C - 140°C erfolgt, muß im Fall der Gummibeschichtung der Gummimasse vor der Vulkanisation in Wasserdampf bei 140°C - 160°C die Metall- oder Keramikpartikel eingemischt werden, z.B. durch Einwalzen oder Einkneten. EPDM rubber covers with the same thickness or Shore hardness are particularly suitable in offset applications using UV-curing inks. Polyamide ("nylon") is suitable as a widely used thermoplastic for both offset applications. While in the case of thermoplastic in the form of polyamide, the manufacture of the Chemical-resistant intermediate layer in the fluidized bed process with addition of metal or ceramic particles at approx. 120 ° C - 140 ° C, in the case of Rubber coating of the rubber mass before vulcanization in water vapor 140 ° C - 160 ° C the metal or ceramic particles are mixed in, e.g. by Roll in or knead in.

Die chemikalienbeständige Zwischenschicht, also die Beschichtung aus Hartgummi oder Thermoplast 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, i.e. the hard rubber coating or thermoplastic has to be sanded until the dispersed metal or Ceramic particles can also be seen sanded on the surface. As a metal or Ceramic particles are expediently used in commercially available wettable powder, such as it is used for thermal spraying.

Die weitere Beschichtung des mit der angeschliffenen Zwischenschicht aus Hartgummi oder Thermoplast 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 oder Thermoplast 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 with the sanded intermediate layer Hard rubber or thermoplastic fiber-reinforced plastic body preferably depending on the application (as damp, color, guide, tension, weaving tree, or discharge roller etc.) preferably by thermal spraying more suitable Materials such as Oxide ceramic on high-alloy chrome / nickel steel adhesive layer for Dampening roller application or wear-resistant hard material layer (WC / CO, WC / Ni Cr3C2 / NiCr, NiCrBSi) for guide roller application. In a particularly preferred manner is a on the ground coating of hard rubber or thermoplastic Functional printing layer by plasma spraying of high-alloy Chromium-nickel steel and subsequently applied by oxide ceramics, which by Grinding, polishing, brushing or scouring up to a roughness of Rz ≤ 3.0 µm is smoothed to also preferably used as a dampening roller surface become.

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.e. the functional layer of the with the sanded Interlayer protected fiber reinforced plastic body can naturally also by other comparatively cold coating processes such as electroplating, chemical deposition, cathode sputtering (PVD), sol-gel etc. take place, with chromium, nickel, copper, oxide ceramics or combinations thereof be deposited.

Das Resultat dieses Verfahrens ist ein Rotationskörper mit einem Grundkörper aus faserverstärktem, insbesondere kohlestofffaserverstärktem Kunststoff mit einer darauf aufgebrachten chemikalienbeständigen Zwischenschicht aus Hartgummi oder Thermoplast, 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 process is a rotating body with a basic body fiber reinforced, in particular carbon fiber reinforced plastic with a chemical-resistant hard rubber intermediate layer or Thermoplastic, which has a metal or ceramic dispersion content of 5 vol .-% - 80 vol .-% has and with a particular printing technology functional layer Metal and / or ceramic is covered.

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 press Be plastic sleeve (sleeve) with the manufactured according to the invention chemical-resistant protective coating is provided, and so on a Plate cylinder or rubber cylinder can be pulled up.

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 rotary body according to the invention can also be an anilox ink roller, wherein then the surface of the chemical-resistant protective layer made of laser-screened Chromium oxide exists and so the function of an anilox roller for short inking units in Offset, gravure and flexographic printing machines fulfilled.

Claims (13)

Verfahren zur Herstellung einer chemikalienbeständigen Schutzschicht für einen Rotationskörper mit einem Grundkörper aus faserverstärktem Kunststoff, insbesondere für Walzenkörper einer Druckmaschine, dadurch gekennzeichnet, dass zuerst eine Beschichtung aus Hartgummi oder Thermoplast auf dem Grundkörper aus faserverstärktem Kunststoff mit einem Metall- oder Keramikdispersionsanteil von 5 Vol % - 80 Vol % erfolgt, die daraufhin geglättet wird und danach auf die angeschliffene Dispersionspartikel enthaltene Oberfläche in einem weiteren Schritt, vorzugsweise durch thermisches Spritzen, eine Funktionsschicht aus Metall und/oder Keramik aufgebracht wird.Process for producing a chemical-resistant protective layer for a rotary body with a base made of fiber-reinforced plastic, in particular for roller bodies of a printing machine, characterized in that first a coating of hard rubber or thermoplastic on the base made of fiber-reinforced plastic with a metal or ceramic dispersion content of 5% by volume - 80 vol% takes place, which is then smoothed and then a functional layer of metal and / or ceramic is applied to the surface containing the ground dispersion particles in a further step, preferably by thermal spraying. Verfahren nach Anspruch 1 dadurch gekennzeichnet, dass die Beschichtung aus Hartgummi unter Verwendung von NBR- oder EPDM-Gummimassen mit einer Metall- oder Keramikdispersion erfolgt, derart dass eine Härte von 40° Shore D bis 80° Shore D erreicht wird.A method according to claim 1, characterized in that the coating of hard rubber is carried out using NBR or EPDM rubber compositions with a metal or ceramic dispersion, so that a hardness of 40 ° Shore D to 80 ° Shore D is achieved. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Beschichtung aus Thermoplast im Fluidized-Bed-Verfahren erfolgt, unter Verwendung von Polyamidgranulat in das Metall- oder Keramikpartikel eingemischt sind oder an die Granulatkörner agglomeriert sind.A method according to claim 1, characterized in that the coating of thermoplastic is carried out in the fluidized-bed process, mixed with polyamide granules in the metal or ceramic particles or agglomerated to the granules. Verfahren nach einem der vorhergehenden Ansprüche dadurch gekennzeichnet, dass die Beschichtung aus Hartgummi oder Thermoplast der chemikalienbeständigen Schutzschicht auf dem faserverstärkten Kunststoffgrundkörper eine Dicke zwischen 150 µm bis 1,0 cm, vorzugsweise zwischen 500 µm bis 1000 µm aufweist. Method according to one of the preceding claims, characterized in that the coating of hard rubber or thermoplastic of the chemical-resistant protective layer on the fiber-reinforced plastic base body has a thickness between 150 µm to 1.0 cm, preferably between 500 µm to 1000 µm. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 4, dadurch gekennzeichnet, dass auf die angeschliffene Beschichtung aus Hartgummi oder Thermoplast eine drucktechnische Funktionsschicht durch Thermisches Spritzen von hochlegiertem Chromnickelstahl und nachfolgend von Oxidkeramik aufgebracht wird und durch Schleifen und Polieren bis hin zu einer Rauhigkeit von Rz ≤ 3,0 µm geglättet wird.Method according to one of the preceding claims 1 to 4, characterized in that a functional technical layer is applied to the ground coating of hard rubber or thermoplastic by thermal spraying of high-alloy chromium-nickel steel and subsequently of oxide ceramics and by grinding and polishing up to a roughness of Rz ≤ 3.0 µm is smoothed. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 4, dadurch gekennzeichnet, dass auf die angeschliffene Beschichtung aus Hartgummi oder Thermoplast eine vor Verschleiß schützende Hartstoffschicht wie z.B. aus Oxidkeramik WC/CO, WC/Ni, Cr3C2/NiCr, NiCrBSi, oder Mo durch thermisches Spritzen aufgetragen wird und anschließend entsprechend der Verwendung des Rotationskörpers geglättet wird.Method according to one of the preceding claims 1 to 4, characterized in that on the sanded coating made of hard rubber or thermoplastic, a hard material layer protecting against wear, for example made of oxide ceramic WC / CO, WC / Ni, Cr 3 C 2 / NiCr, NiCrBSi, or Mo is applied by thermal spraying and then smoothed according to the use of the rotary body. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 4, dadurch gekennzeichnet, dass auf die angeschliffene Beschichtung aus Hartgummi oder Thermoplast durch Kathodenzerstäubung (PVD), chemische Abscheidung, Galvanik, Plasma CVD, Sol/Gel oder ähnlich kalte Beschichtungsverfahren eine Funktionsschicht z.B. aus Chrom, Nickel, Kupfer, Oxidkeramik oder Kombinationen daraus abgeschieden wird.Method according to one of the preceding claims 1 to 4, characterized in that on the ground coating of hard rubber or thermoplastic by sputtering (PVD), chemical deposition, electroplating, plasma CVD, sol / gel or similar cold coating processes, a functional layer, for example made of chromium, nickel , Copper, oxide ceramics or combinations thereof is deposited. Rotationskörper wie z. B. ein Sleeve mit einem Grundkörper aus faserverstärktem Kunststoff mit einer darauf aufgebrachten chemikalienbeständigen Zwischenschicht aus Hartgummi oder Thermoplast, die einen Metall- oder Keramikdispersionsanteil von 5 Vol.-% - 80 Vol.-% aufweist und mit einer insbesonderen drucktechnischen Funktionsschicht aus Metall und/oder Keramik bedeckt ist.Rotational body such as B. a sleeve with a body made of fiber-reinforced Plastic with a chemical-resistant coating on it Intermediate layer of hard rubber or thermoplastic, which is a metal or Ceramic dispersion share of 5 vol .-% - 80 vol .-% and with a in particular, printing technology functional layer made of metal and / or ceramic is covered. Rotationskörper nach Anspruch 8, dadurch gekennzeichnet, dass die Funktionsschicht durch Plasmaspritzen von hochlegiertem Chromnickelstahl und nachfolgend von Oxidkeramik aufgebracht ist und durch Schleifen und Polieren bis hin zu einer Rauhigkeit von Rz ≤ 3,0 µm geglättet ist. Rotary body according to claim 8, characterized in that the functional layer is applied by plasma spraying of high-alloy chromium-nickel steel and subsequently of oxide ceramic and is smoothed by grinding and polishing to a roughness of Rz ≤ 3.0 µm. Rotationskörper nach Anspruch 8, dadurch gekennzeichnet, dass die Zwischenschicht aus Hartgummi oder Thermoplast eine Dicke zwischen 150 µm bis 1,0 cm, vorzugsweise zwischen 500 µm bis 1000 µm aufweist.Rotary body according to claim 8, characterized in that the intermediate layer made of hard rubber or thermoplastic has a thickness between 150 µm to 1.0 cm, preferably between 500 µm to 1000 µm. Rotationskörper nach den Ansprüchen 8 bis 10, gekennzeichnet durch die Anwendung als Feuchtwalze.Rotary body according to claims 8 to 10, characterized by use as a dampening roller. Rotationskörper nach den Ansprüchen 8 bis 10, gekennzeichnet durch die Anwendung in Form eines Hülsenkörpers (Sleevetechnik).Rotary body according to claims 8 to 10, characterized by the application in the form of a sleeve body (sleeve technology). Rotationskörper nach Anspruch 8, gekennzeichnet durch die Verwendung als Rasterfarbwalze, wobei die chemikalienbeständige Schutzschicht an der Oberfläche aus lasergraviertem Chromoxid besteht.Rotary body according to claim 8, characterized by the use as an anilox roller, the chemical-resistant protective layer on the surface consisting of laser-engraved chromium oxide.
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)

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US6797331B2 (en) 2004-09-28
EP1264708B1 (en) 2008-07-30

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