[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

WO1998024631A1 - Color processing roller - Google Patents

Color processing roller Download PDF

Info

Publication number
WO1998024631A1
WO1998024631A1 PCT/DE1996/002368 DE9602368W WO9824631A1 WO 1998024631 A1 WO1998024631 A1 WO 1998024631A1 DE 9602368 W DE9602368 W DE 9602368W WO 9824631 A1 WO9824631 A1 WO 9824631A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating material
roller
core
coating
resin
Prior art date
Application number
PCT/DE1996/002368
Other languages
German (de)
French (fr)
Inventor
Achim Siebert
Andreas Haakmann
Original Assignee
Westland Gummiwerke Gmbh & Co.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to DE19529809A priority Critical patent/DE19529809C2/en
Application filed by Westland Gummiwerke Gmbh & Co. filed Critical Westland Gummiwerke Gmbh & Co.
Priority to EP96946063A priority patent/EP0942833B1/en
Priority to PCT/DE1996/002368 priority patent/WO1998024631A1/en
Publication of WO1998024631A1 publication Critical patent/WO1998024631A1/en

Links

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
    • B41N7/00—Shells for rollers of printing machines
    • B41N7/06—Shells for rollers of printing machines for inking rollers
    • 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
    • B41N2207/14—Location or type of the layers in shells for rollers of printing machines characterised by macromolecular organic compounds

Definitions

  • the invention relates to a roller for ink processing and the like, in particular as a distribution cylinder for printing machines, with a rotationally symmetrical core and a coating applied to the core.
  • rollers are mostly used for the uniform distribution of a pressure medium coming into contact with the roller and for the uniform transfer of this medium to other flat objects.
  • such rollers serve as distribution cylinders for printing presses in which the printing medium is conveyed from the storage vessel of the printing medium to the printing plate by means of a transfer roller and roller system having distribution cylinders to produce a thin, printable ink film, and is "ground” by means of the distribution cylinders.
  • the distribution cylinders generally consist of a comparatively hard material, while the transfer rollers, on the other hand, consist of a comparatively soft material.
  • the processability of the medium brought into contact with the rollers depends on the one hand on the properties of the roller coating, in particular on its wettability and surface quality.
  • the roller coatings have to meet special requirements, for example with regard to abrasion behavior and mechanical stability, as well as with regard to chemical resistance to the applied medium, cleaning agents, etc.
  • a defined temperature control of what is applied to the roller is often essential for a defined process control Medium.
  • the temperature of the printing medium applied to the rollers must often be kept in the range of 25 to 35 ° C during the printing process in order to achieve an optimal print image.
  • the temperature of the pressure medium is controlled by heat dissipation via the roller, which is water-cooled for this purpose, for example. It should be taken into account that the coating material mostly has a thermally insulating effect and hinders the heat dissipation from the medium applied to the roller to the roller core. This problem is exacerbated particularly at high printing speeds or when using print media without fountain solution.
  • thermoplastic polyamides are applied to the roller by means of a powder coating process, a homogeneous roller coating being produced by subsequent sintering.
  • the coating is connected to the roll core due to the shrinkage that occurs when the thermoplastic material cools. Since the thermoplastic material is comparatively brittle at room temperature or at the temperature during the printing process, the coating material must be applied to the roll core in the above-mentioned layer thickness in order to avoid mechanical damage.
  • a reduction in the layer thickness of the thermoplastic material with a thermal conductivity ⁇ of approximately 0.2 W / mK to improve the heat dissipation to the roll core is therefore ruled out due to the mechanical properties of the coating material.
  • rollers for ink applications that improve heat dissipation allow the medium applied to the roller to the roller core, the rollers also being usable in particular as distribution cylinders for printing presses, and which meet the requirements placed on them in terms of chemical resistance and wettability with respect to the printing medium and cleaning agents and have sufficient mechanical resistance and a long service life .
  • the coating material consists of an elastomeric material and / or of a reactive resin, that the layer thickness of the coating material is comparatively thin and that the coating material is adhesively connected to the rotationally symmetrical core.
  • Natural or synthetic rubber for example, can be used as elastomeric materials, and conventional primer systems, for example, can be used as reactive resins. Due to the adhesive connection of the coating materials used according to the invention, there is sufficient mechanical resistance of the roller coating even with small layer thicknesses, the coating materials particularly meeting the requirements with regard to chemical resistance and wettability with regard to printing media and cleaning agents.
  • the roller coating Due to the adhesive connection to the roller core and due to the small layer thickness, the roller coating has a high strength even under the heat introduced during the printing process and the mechanical stresses, since these are essentially absorbed by the roller core and not, as is the case with conventional, comparatively thick roller coatings the case is to be caught by the roll coating.
  • the lifespan of the roller is largely determined by the adhesion of the coating to the roller core.
  • the thermal conductivity of the coating material preferably has high values, for example 0.4 W / mK, compared to conventional coating materials.
  • the heat flow of can thus be reduced when the layer thickness of the coating material is reduced from 0.5 mm to 0.1 mm and the thermal conductivity of the coating material according to the invention is 0.4 W / mK compared to approximately 0.2 W / mK of conventional coating materials the roll surface to the roll core and thus the cooling performance of the roll can be improved by a factor of 10 without additional cooling devices being necessary.
  • the rollers can additionally be provided with cooling devices and thus the heat dissipation can be further improved, while the use of additional cooling devices when using conventional coating materials does not appear to be expedient due to their thermally insulating properties.
  • the coating material preferably contains thermally crosslinkable hard rubber, which advantageously has a high hardness and a high degree of crosslinking.
  • the coating material advantageously contains polymeric nitrile butadiene, phenolic resins, epoxy resins, polyurethanes, reactive primer systems, polyester resin, silicone resin, acrylic resin, acrylates or a mixture of two or more of these components.
  • the coating material can contain fillers, preferably in proportions of less than 50% by weight. zent, especially 20 to 25 percent by weight. Carbon black and / or active, silanized silica can be used in particular.
  • the layer thickness of the coating material can be less than 100 ⁇ , preferably 5 to 40 ⁇ .
  • the rollers according to the invention can be used in particular as distribution cylinders in printing machines.
  • the long service life of the rollers which is due to the thin layer thickness and the adhesive connection to the roller core, is particularly advantageous, since the rollers used as distribution cylinders in printing machines can only be replaced with great effort.
  • rollers can also be used advantageously, for example, in other forms of processing, for example in the mixing of printing media and the like at a defined temperature.
  • the rollers according to the invention can advantageously be produced by dissolving or dispersing the coating material in a liquid medium, by applying the solution or dispersion to the roller core, by removing the solvent or dispersant and by adhering the coating material to the surface of the rotationally symmetrical roller core .
  • the coating material can be applied to the roll core in very thin and precisely definable layers.
  • the roller core can be treated with an adhesion promoter before the solution or dispersion containing the coating material is applied.
  • the solvent or dispersant containing the coating material can be applied by spraying, dipping, brushing or by knife application.
  • Spraying can produce a coating with a particularly uniform layer thickness and high surface quality.
  • the roller provided with the coating material is advantageously post-treated to remove the solvent or dispersant and / or to crosslink a thermally crosslinkable coating material.
  • the coating material is applied to the roller core in thin layer thicknesses, then mechanical reworking of the coating is necessary to treat the surface and to achieve a roller with sufficiently dimensionally accurate external dimensions, as is usually done with conventional rollers coated with thermoplastic polyamides by grinding off the excess coating material , unnecessary.
  • the roller coating can also be advantageous to apply several coatings, if necessary after each separate thermal intermediate treatment, to the roller core, the individual layers of the coating also having different compositions and different mechanical properties such as hardness , Elasticity, etc. may have.
  • the coating material has, for example, the following composition:
  • the components are mixed using devices customary in the rubber processing industry and applied as a 30 percent solution of a suitable organic solvent by spraying to the roll core, which was previously degreased by known processes and freed from surface oxide layers. After the solvent has been vented off, the applied compound is crosslinked in a warm air oven while supplying heat.
  • the heat can be supplied by means of a warm air oven or by means of IR radiation.

Landscapes

  • Rolls And Other Rotary Bodies (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

It is possible to significantly improve the process of dissipating toward the roller the heat from the coating material applied to the rollers, especially the heat from the printing material on the distributing cylinders, by using as a coating material a product made of an elastomer and/or a reactive resin and ensuring that the coat work is relatively thin and adhesively fit to the rotational symmetry core of the roller. The inventive coating material is particularly suited to the spray process.

Description

Walze für Farbverarbeitung Ink processing roller
Die Erfindung betrifft eine Walze für Farbverarbeitung und dergleichen, insbesondere als Reibzylinder für Druckmaschinen, mit rotationssymmetrischem Kern sowie einer auf den Kern aufgebrachten Beschichtung.The invention relates to a roller for ink processing and the like, in particular as a distribution cylinder for printing machines, with a rotationally symmetrical core and a coating applied to the core.
Derartige Walzen werden zumeist zur gleichmäßigen Verteilung eines mit der Walze in Kontakt tretenden Druckmediums und zur gleichmäßigen Übertragung dieses Mediums auf andere flächige Gegenstände eingesetzt. Insbesondere dienen derartige Walzen als Reibzylinder für Druckmaschinen, bei denen zur Erzeugung eines dünnen, verdruckbaren Farbfilms das Druckmedium mittels eines Übertragungswalzen sowie Reibzylinder aufweisenden Walzensystems vom Vorratsgefäß des Druckmediums zur Druckplatte gefördert und dabei mittels der Reibzylinder "verrieben" wird. Die Reibzylinder bestehen dabei im allgemeinen aus einem ver- gleichsweise harten, die Übertragungswalzen dagegen aus einem vergleichsweise weichen Material. Die Verarbeitbarkeit des mit den Walzen in Kontakt gebrachten Mediums hängt zum einen von den Eigenschaften der Walzenbeschichtung, insbesondere von deren Benetzbarkeit und Oberflächenbeschaffenheit ab. Darüber hinaus sind an die Walzenbeschichtungen besondere Anforderungen beispielsweise hinsichtlich Abrasionsverhalten und mechanischer Stabilität sowie hinsichtlich der chemischen Beständigkeit gegenüber dem aufgebrachten Medium, Reinigungsmitteln usw. zu stellen.Such rollers are mostly used for the uniform distribution of a pressure medium coming into contact with the roller and for the uniform transfer of this medium to other flat objects. In particular, such rollers serve as distribution cylinders for printing presses in which the printing medium is conveyed from the storage vessel of the printing medium to the printing plate by means of a transfer roller and roller system having distribution cylinders to produce a thin, printable ink film, and is "ground" by means of the distribution cylinders. The distribution cylinders generally consist of a comparatively hard material, while the transfer rollers, on the other hand, consist of a comparatively soft material. The processability of the medium brought into contact with the rollers depends on the one hand on the properties of the roller coating, in particular on its wettability and surface quality. In addition, the roller coatings have to meet special requirements, for example with regard to abrasion behavior and mechanical stability, as well as with regard to chemical resistance to the applied medium, cleaning agents, etc.
Wesentlich für eine definierte Prozeßführung ist dabei oftmals eine definierte Temperierung des auf der Walze aufgebrachten Mediums . So ist bei Druckprozessen die Temperatur des auf die Walzen aufgebrachten Druckmediums während des Druckvorganges oftmals im Bereich von 25 bis 35 °C zu halten, um ein optimales Druckbild zu erzielen. Die Temperierung des Druckmediums erfolgt dabei durch Wärmeabfuhr über die Walze, die hierzu beispielsweise wassergekühlt wird. Dabei ist zu berücksichtigen, daß das Beschichtungsmaterial zumeist thermisch isolierend wirkt und die Wärmeabfuhr von dem auf die Walze aufgetragenen Medium zum Walzenkern hin behindert. Dieses Problem wird insbesondere bei hohen Druckgeschwindigkeiten oder bei Verwendung von Druckmedien ohne Feuchtmittel verschärft.A defined temperature control of what is applied to the roller is often essential for a defined process control Medium. In printing processes, the temperature of the printing medium applied to the rollers must often be kept in the range of 25 to 35 ° C during the printing process in order to achieve an optimal print image. The temperature of the pressure medium is controlled by heat dissipation via the roller, which is water-cooled for this purpose, for example. It should be taken into account that the coating material mostly has a thermally insulating effect and hinders the heat dissipation from the medium applied to the roller to the roller core. This problem is exacerbated particularly at high printing speeds or when using print media without fountain solution.
Herkömmliche in Druckmaschinen eingesetzte Reibzylinder weisen zumeist Polyamidbeschichtungen in einer Dicke von ca. 0,5 mm auf, die die oben genannten mechanischen und chemischen Anforderungen erfüllen, jedoch nur eine mäßige Wärmeabfuhr von dem auf die Walze aufgetragenen Medium zum Walzenkern hin gestatten und damit beispielsweise die Druckgeschwindigkeit begrenzen. Die bisher eingesetzten thermoplastischen Polyamide werden mittels eines Pulverbeschichtungsverfahrens auf die Walze aufgebracht, wobei durch nachfolgendes Sintern eine homogene Walzenbeschichtung erzeugt wird. Die Beschichtung ist dabei aufgrund der beim Abkühlen des thermoplastischen Materials erfolgenden Schrumpfung mit dem Walzenkern verbunden. Da das thermoplastische Material bei Raumtemperatur bzw. bei der Temperatur während des Druckvorganges vergleichsweise spröde ist, ist zur Vermeidung von mechanischen Beschädigungen das Beschichtungsmaterial in der oben genannten Schichtdicke auf den Walzenkern aufzubringen. Eine Verringerung der Schicht- dicke des thermoplastischen Materials mit einer Wärmeleitfähigkeit λ von ca. 0,2 W/mK zur Verbesserung der Wärmeabfuhr zum Walzenkern hin scheidet somit aufgrund der mechanischen Eigenschaften des Beschichtungsmaterials aus.Conventional distribution cylinders used in printing machines mostly have polyamide coatings with a thickness of approx.0.5 mm, which meet the mechanical and chemical requirements mentioned above, but only allow moderate heat dissipation from the medium applied to the roller to the roller core and thus, for example, the Limit print speed. The previously used thermoplastic polyamides are applied to the roller by means of a powder coating process, a homogeneous roller coating being produced by subsequent sintering. The coating is connected to the roll core due to the shrinkage that occurs when the thermoplastic material cools. Since the thermoplastic material is comparatively brittle at room temperature or at the temperature during the printing process, the coating material must be applied to the roll core in the above-mentioned layer thickness in order to avoid mechanical damage. A reduction in the layer thickness of the thermoplastic material with a thermal conductivity λ of approximately 0.2 W / mK to improve the heat dissipation to the roll core is therefore ruled out due to the mechanical properties of the coating material.
Es ist somit Aufgabe der vorliegenden Erfindung, Walzen für Farbaufträge zu schaffen, die eine verbesserte Wärmeabfuhr vom auf die Walze aufgebrachten Medium zum Walzenkern hin gestatten, wobei die Walzen insbesondere auch als Reibzylinder für Druckmaschinen einsetzbar sind, und die die hierbei an diese gestellten Anforderungen hinsichtlich chemischer Beständigkeit und Benetzbarkeit gegenüber dem Druckmedium und Reinigungsmitteln erfüllen und eine ausreichende mechanische Beständigkeit sowie hohe Lebensdauer aufweisen.It is therefore an object of the present invention to provide rollers for ink applications that improve heat dissipation allow the medium applied to the roller to the roller core, the rollers also being usable in particular as distribution cylinders for printing presses, and which meet the requirements placed on them in terms of chemical resistance and wettability with respect to the printing medium and cleaning agents and have sufficient mechanical resistance and a long service life .
Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Be- schichtungsmaterial aus einem elastomeren Material und/oder aus einem reaktiven Harz besteht, daß die Schichtdicke des Beschichtungsmaterials vergleichsweise dünn ist und daß das Beschichtungsmaterial haftend mit dem rotationssymmetrischen Kern verbunden ist. Als elastomere Materialien sind beispiels- weise natürlicher oder synthetischer Kautschuk, als reaktive Harze beispielsweise herkömmliche Primersysteme einsetzbar. Durch die haftende Verbindung der erfindungsgemäß eingesetzten Beschichtungsmaterialien ist auch bei geringen Schichtdicken eine ausreichende mechanische Beständigkeit der Walzenbe- Schichtung gegeben, wobei die Beschichtungsmaterialien die Anforderungen hinsichtlich chemischer Beständigkeit und Benetzbarkeit gegenüber Druckmedien und Reinigungsmitteln im besonderen Maße erfüllen. Durch die haftende Verbindung mit dem Walzenkern und aufgrund der geringen Schichtdicke weist die Walzenbeschichtung auch unter der beim Druckvorgang eingebrachten Wärme und der mechanischen Beanspruchungen eine hohe Festigkeit auf, da diese im wesentlichen vom Walzenkern aufgenommen werden und nicht, wie dies bei herkömmlichen, vergleichsweise dicken Walzenbeschichtungen der Fall ist, von der Walzenbeschichtung aufzufangen sind. Die Lebensdauer der Walze wird dabei wesentlich durch die Haftung der Beschichtung mit dem Walzenkern bestimmt. Des weiteren ist durch die geringe Schichtdicke des Beschichtungsmaterials nur eine vergleichsweise geringe thermische Isolierung der Walze und damit eine gute Wärmeabfuhr gegeben. Die Wärmeleitf higkeit des Beschichtungsmaterials weist vorzugsweise verglichen mit herkömmlichen Beschichtungsmaterialien hohe Werte, beispielsweise einen solchen von 0,4 W/mK auf .The object is achieved in that the coating material consists of an elastomeric material and / or of a reactive resin, that the layer thickness of the coating material is comparatively thin and that the coating material is adhesively connected to the rotationally symmetrical core. Natural or synthetic rubber, for example, can be used as elastomeric materials, and conventional primer systems, for example, can be used as reactive resins. Due to the adhesive connection of the coating materials used according to the invention, there is sufficient mechanical resistance of the roller coating even with small layer thicknesses, the coating materials particularly meeting the requirements with regard to chemical resistance and wettability with regard to printing media and cleaning agents. Due to the adhesive connection to the roller core and due to the small layer thickness, the roller coating has a high strength even under the heat introduced during the printing process and the mechanical stresses, since these are essentially absorbed by the roller core and not, as is the case with conventional, comparatively thick roller coatings the case is to be caught by the roll coating. The lifespan of the roller is largely determined by the adhesion of the coating to the roller core. Furthermore, due to the small layer thickness of the coating material, there is only comparatively little thermal insulation of the roller and thus good heat dissipation. The thermal conductivity of the coating material preferably has high values, for example 0.4 W / mK, compared to conventional coating materials.
Mittels der erfindungsgemäßen Walzen kann somit bei Reduzierung der Schichtdicke des Beschichtungsmaterials von 0,5 mm auf 0,1 mm sowie einer Wärmeleitfähigkeit des erfindungsgemäßen Beschichtungsmaterials von 0,4 W/mK gegenüber ca. 0,2 W/mK von herkömmlichen Beschichtungsmaterialien der Wärmestrom von der Walzenoberfläche zum Walzenkern und damit die Kühlleistung der Walze um den Faktor 10 verbessert werden, ohne daß zusätzliche Kühleinrichtungen notwendig sind.By means of the rollers according to the invention, the heat flow of can thus be reduced when the layer thickness of the coating material is reduced from 0.5 mm to 0.1 mm and the thermal conductivity of the coating material according to the invention is 0.4 W / mK compared to approximately 0.2 W / mK of conventional coating materials the roll surface to the roll core and thus the cooling performance of the roll can be improved by a factor of 10 without additional cooling devices being necessary.
Aufgrund der guten Wärmeabfuhr durch das erfindungsgemäße Beschichtungsmaterial können die Walzen jedoch zusätzlich mit Kühleinrichtungen versehen werden und damit die Wärmeabfuhr weiter verbessert werden, während der Einsatz zusätzlicher Kühleinrichtungen bei Verwendung herkömmlicher Beschichtungs- materialien aufgrund deren thermisch isolierenden Eigenschaften wenig zweckmäßig erscheint.Due to the good heat dissipation by the coating material according to the invention, however, the rollers can additionally be provided with cooling devices and thus the heat dissipation can be further improved, while the use of additional cooling devices when using conventional coating materials does not appear to be expedient due to their thermally insulating properties.
Das Beschichtungsmaterial enthält vorzugsweise thermisch vernetzbaren Hartgummi, der vorteilhafterweise eine hohe Härte sowie einen hohen Vernetzungsgrad aufweist.The coating material preferably contains thermally crosslinkable hard rubber, which advantageously has a high hardness and a high degree of crosslinking.
Das Beschichtungsmaterial enthält vorteilhafterweise poly eres Nitrilbutadien, Phenolharze, Epoxyharze, Polyurethane, reaktive Primersysteme, Polyesterharz, Silikonharz, Acrylharz, Acrylate oder eine Mischung aus zwei oder mehreren dieser Komponenten.The coating material advantageously contains polymeric nitrile butadiene, phenolic resins, epoxy resins, polyurethanes, reactive primer systems, polyester resin, silicone resin, acrylic resin, acrylates or a mixture of two or more of these components.
Zur Erhöhung der thermischen Leitfähigkeit sowie zur Verbesserung der mechanischen Eigenschaften wie Abrasionsverhalten, Haftvermögen, Elastizität usw. kann das Beschichtungsmaterial Füllstoffe, vorzugsweise in Anteilen kleiner 50 Gewichtspro- zent, insbesondere 20 bis 25 Gewichtsprozent enthalten. Hierbei können insbesondere Ruß und/oder aktive, silanisierte Kieselsäure eingesetzt werden.In order to increase the thermal conductivity and to improve the mechanical properties such as abrasion behavior, adhesion, elasticity etc., the coating material can contain fillers, preferably in proportions of less than 50% by weight. zent, especially 20 to 25 percent by weight. Carbon black and / or active, silanized silica can be used in particular.
Die Schichtdicke des Beschichtungsmaterials kann kleiner 100 μ, vorzugsweise 5 bis 40 μ betragen.The layer thickness of the coating material can be less than 100 μ, preferably 5 to 40 μ.
Die erfindungsgemäßen Walzen sind insbesondere als Reibzylinder in Druckmaschinen einsetzbar. Hierbei ist insbesondere die durch die dünne Schichtdicke und die haftende Verbindung mit dem Walzenkern bedingte hohe Lebensdauer der Walzen vorteilhaft, da die als Reibzylinder bei Druckmaschinen eingesetzten Walzen nur überaus aufwendig austauschbar sind.The rollers according to the invention can be used in particular as distribution cylinders in printing machines. The long service life of the rollers, which is due to the thin layer thickness and the adhesive connection to the roller core, is particularly advantageous, since the rollers used as distribution cylinders in printing machines can only be replaced with great effort.
Die Walzen sind jedoch beispielsweise auch bei anderen Formen der Verarbeitung, beispielsweise bei dem Mischen von Druckmedien und dergleichen unter definierter Temperatur, vorteilhaft einsetzbar .However, the rollers can also be used advantageously, for example, in other forms of processing, for example in the mixing of printing media and the like at a defined temperature.
Die erfindungsgemäßen Walzen sind vorteilhafterweise dadurch herstellbar, daß das Beschichtungsmaterial in einem flüssigen Medium gelöst oder dispergiert wird, daß die Lösung oder Dispersion auf den Walzenkern aufgebracht wird, daß das Lösungsoder Dispergiermittel entfernt und das Beschichtungsmaterial haftend mit der Oberfläche des rotationssymmetrischen Walzenkerns in Verbindung gebracht wird. Hierdurch ist im Gegensatz zu herkömmlichen Pulverbeschichtungen mit nachfolgendem Sintern das Beschichtungsmaterial in sehr dünnen und genau definierbaren Schichten auf den Walzenkern aufbringbar.The rollers according to the invention can advantageously be produced by dissolving or dispersing the coating material in a liquid medium, by applying the solution or dispersion to the roller core, by removing the solvent or dispersant and by adhering the coating material to the surface of the rotationally symmetrical roller core . In contrast to conventional powder coatings with subsequent sintering, the coating material can be applied to the roll core in very thin and precisely definable layers.
Der Walzenkern kann vor Aufbringen der das Beschichtungsmaterial enthaltenden Lösung oder Dispersion mit einem Haftvermittler behandelt werden.The roller core can be treated with an adhesion promoter before the solution or dispersion containing the coating material is applied.
Das Aufbringen des das Beschichtungsmaterial enthaltenden Lösungs- oder Dispergiermittels kann durch Sprühen, Tauchen, Streichen oder durch Rakelauftrag erfolgen. Insbesondere durch Aufsprühen ist eine Beschichtung besonders gleichmäßiger Schichtdicke und hoher Oberflächenqualität herstellbar.The solvent or dispersant containing the coating material can be applied by spraying, dipping, brushing or by knife application. In particular through Spraying can produce a coating with a particularly uniform layer thickness and high surface quality.
Die mit dem Beschichtungsmaterial versehene Walze wird vor- teilhafterweise zur Entfernung des Lösungs- oder Dispergiermittels und/oder zur Vernetzung eines thermisch vernetzbaren Beschichtungsmaterials thermisch nachbehandelt.The roller provided with the coating material is advantageously post-treated to remove the solvent or dispersant and / or to crosslink a thermally crosslinkable coating material.
Wird das Beschichtungsmaterial in dünnen Schichtdicken auf den Walzenkern aufgetragen, so ist eine mechanische Nachbearbeitung der Beschichtung zur Oberflächenvergütung sowie zur Erzielung einer Walze mit ausreichend maßgenauen Außenabmessungen, wie sie bei herkömmlichen, mit thermoplastischen Polyamiden beschichteten Walzen zumeist durch Abschleifen des im Übermaß aufgebrachten Beschichtungsmaterials durchgeführt wird, entbehrlich.If the coating material is applied to the roller core in thin layer thicknesses, then mechanical reworking of the coating is necessary to treat the surface and to achieve a roller with sufficiently dimensionally accurate external dimensions, as is usually done with conventional rollers coated with thermoplastic polyamides by grinding off the excess coating material , unnecessary.
Zur Abstimmung der mechanischen Eigenschaften der Walzenbeschichtung oder zur Erzielung einer ausreichenden Schichtdicke des Auftrags kann es auch vorteilhaft sein mehrere Beschichtungen, gegebenenfalls nach jeweils separater thermischer Zwischenbehandlung, auf den Walzenkern aufzubringen, wobei die einzelnen Lagen der Beschichtung auch unterschiedliche Zusammensetzungen und unterschiedliche mechanische Eigenschaften wie Härte, Elastizität usw. aufweisen können.To coordinate the mechanical properties of the roller coating or to achieve a sufficient layer thickness of the application, it can also be advantageous to apply several coatings, if necessary after each separate thermal intermediate treatment, to the roller core, the individual layers of the coating also having different compositions and different mechanical properties such as hardness , Elasticity, etc. may have.
Die Erfindung wird nachfolgend in einem Ausführungsbeispiel beschrieben und beispielhaft erläutert.The invention is described below in an exemplary embodiment and explained by way of example.
Das Beschichtungsmaterial weist beispielsweise folgende Zusammensetzung auf:The coating material has, for example, the following composition:
Nitrilbutadien 100 TeileNitrile butadiene 100 parts
Phenolharz 100 Teile Zinkoxid 5 TeilePhenolic resin 100 parts zinc oxide 5 parts
Stearinsäure 1 Teil Ruß 70 TeileStearic acid 1 part Carbon black 70 parts
Vulkanisationsmittel 30 TeileVulcanizing agent 30 parts
Beschleuniger 1 TeilAccelerator 1 part
Hexamethylentetraamin 6 TeileHexamethylenetetraamine 6 parts
Die Komponenten werden mittels in der gummiverarbeitenden Industrie üblicher Vorrichtungen gemischt und als 30prozentige Lösung eines geeigneten organischen Lösungsmittels im Sprühverfahren auf den Walzenkern aufgebracht, der zuvor mittels bekannter Verfahren entfettet und von oberflächlichen Oxidschichten befreit wurde. Nach Abluften des Lösungsmittels wird unter Wärmezufuhr in einem Warmluftofen der aufgetragene Com- pound vernetzt. Die Wärmezufuhr kann mittels eines Warmluftofens oder mittels IR-Strahlung erfolgen. The components are mixed using devices customary in the rubber processing industry and applied as a 30 percent solution of a suitable organic solvent by spraying to the roll core, which was previously degreased by known processes and freed from surface oxide layers. After the solvent has been vented off, the applied compound is crosslinked in a warm air oven while supplying heat. The heat can be supplied by means of a warm air oven or by means of IR radiation.

Claims

Patentansprüche claims
1. Walze für Farbverarbeitung und dergleichen, insbesondere als Reibzylinder für Druckmaschinen, mit rotationssymmetrischem Kern sowie einer auf dem Kern aufgebrachten Beschichtung, d a d u r c h g e k e n n z e i c h n e t, daß das Beschichtungsmaterial aus einem elastomeren Mate- rial und/oder aus einem reaktiven Harz besteht, daß die Schichtdicke des Beschichtungsmaterials vergleichsweise dünn ist und daß das Beschichtungsmaterial haftend mit dem rotationssymmetrischen Kern verbunden ist.1. roller for ink processing and the like, in particular as a distribution cylinder for printing machines, with a rotationally symmetrical core and a coating applied to the core, characterized in that the coating material consists of an elastomeric material and / or of a reactive resin that the layer thickness of the coating material is comparatively thin and that the coating material is adhesively bonded to the rotationally symmetrical core.
2. Walze nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß das Beschichtungsmaterial eine vergleichsweise hohe Wärmeleitfähigkeit aufweist.2. Roller according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the coating material has a comparatively high thermal conductivity.
3. Walze nach Anspruch 1 oder 2, d a d u r c h g e - k e n n z e i c h n e t, daß das Beschichtungsmaterial thermisch vernetzbaren Hartgummi aufweist.3. Roller according to claim 1 or 2, that the coating material has thermally crosslinkable hard rubber.
4. Walze nach einem der Ansprüche 1 bis 3, d a d u r c h g e k e n n z e i c h n e t, daß das Beschichtungsmaterial polymeres Nitrilbutadien, Phenolharz, Epoxyharz, Polyurethan, reaktive Primersysteme, Polyesterharz, Silikonharz, Acrylharz, Acrylate oder zwei oder mehrere dieser Komponenten enthält.4. Roll according to one of claims 1 to 3, d a d u r c h g e k e n n z e i c h n e t that the coating material contains polymeric nitrile butadiene, phenolic resin, epoxy resin, polyurethane, reactive primer systems, polyester resin, silicone resin, acrylic resin, acrylates or two or more of these components.
5. Walze nach einem der Ansprüche 1 bis 4, d a d u r c h g e k e n n z e i c h n e t, daß das Beschichtungsma- terial bis zu 50 Gew.-%, vorzugsweise 20 bis 25 Gew.-% Füllstoffe enthält.5. Roller according to one of claims 1 to 4, characterized in that the coating material contains up to 50 wt .-%, preferably 20 to 25 wt .-% fillers.
6. Walze nach einem der Ansprüche 1 bis 5, d a d u r c h g e k e n n z e i c h n e t, daß das Beschichtungsmaterial Ruß und/oder aktive, silanisierte Kieselsäure enthält.6. Roller according to one of claims 1 to 5, that the coating material contains carbon black and / or active, silanized silicic acid.
7. Walze nach einem der Ansprüche 1 bis 6, d a d u r c h g e k e n n z e i c h n e t, daß die Schichtdicke des Beschichtungsmaterials kleiner als 100 μ ist, vorzugsweise 5 bis 40 μ beträgt.7. Roller according to one of claims 1 to 6, d a d u r c h g e k e n n z e i c h n e t that the layer thickness of the coating material is less than 100 μ, preferably 5 to 40 μ.
8. Druckmaschine mit mindestens einer Walze nach einem der Ansprüche 1 bis 7 als Reibzylinder.8. Printing machine with at least one roller according to one of claims 1 to 7 as a distribution cylinder.
9. Verfahren zur Herstellung von Walzen nach einem der Ansprüche 1 bis 8, d a d u r c h g e k e n n z e i c h n e t, daß das Beschichtungsmaterial in einem flüssigen Medium gelöst oder dispergiert wird, daß die Lösung oder Dispersion auf einen Walzenkern aufgebracht wird, daß das Lösungs- oder Dispergiermittel entfernt und daß das Beschichtungsmaterial haftend mit der Oberfläche des Walzenkerns in Verbindung gebracht wird.9. A method for producing rollers according to one of claims 1 to 8, characterized in that the coating material is dissolved or dispersed in a liquid medium, that the solution or dispersion is applied to a roller core, that the solvent or dispersant is removed and that Coating material is adhered to the surface of the roll core.
10. Verfahren zur Herstellung von Walzen nach Anspruch 9, d a d u r c h g e k e n n z e i c h n e t, daß vor Aufbringen der das Beschichtungsmaterial enthaltenden Lösung oder Dispersion der Walzenkern mit einem Haftvermittler behandelt wird.10. A process for the production of rolls according to claim 9, wherein the roll core is treated with an adhesion promoter before application of the solution or dispersion containing the coating material.
11. Verfahren nach Anspruch 9 oder 10, d a d u r c h g e k e n n z e i c h n e t, daß das Beschichtungsmaterial im Sprühverfahren auf den Walzenkern aufgebracht wird.11. The method according to claim 9 or 10, d a d u r c h g e k e n n z e i c h n e t that the coating material is applied by spraying on the roll core.
12. Verfahren nach einem der Ansprüche 9 bis 11, d a d u r c h g e k e n n z e i c h n e t, daß die mit dem Beschichtungsmaterial versehene Walze thermisch nachbehandelt wird. 12. The method according to any one of claims 9 to 11, that the roller provided with the coating material is post-treated thermally.
PCT/DE1996/002368 1995-08-14 1996-12-07 Color processing roller WO1998024631A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19529809A DE19529809C2 (en) 1995-08-14 1995-08-14 Roller for paint processing and its use
EP96946063A EP0942833B1 (en) 1996-12-07 1996-12-07 Color processing roller
PCT/DE1996/002368 WO1998024631A1 (en) 1995-08-14 1996-12-07 Color processing roller

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19529809A DE19529809C2 (en) 1995-08-14 1995-08-14 Roller for paint processing and its use
PCT/DE1996/002368 WO1998024631A1 (en) 1995-08-14 1996-12-07 Color processing roller

Publications (1)

Publication Number Publication Date
WO1998024631A1 true WO1998024631A1 (en) 1998-06-11

Family

ID=25962874

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1996/002368 WO1998024631A1 (en) 1995-08-14 1996-12-07 Color processing roller

Country Status (2)

Country Link
DE (1) DE19529809C2 (en)
WO (1) WO1998024631A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6224526B1 (en) 1997-12-19 2001-05-01 H.B. Fuller Licensing & Financing, Inc. Printing rollers
US5997456A (en) * 1998-02-12 1999-12-07 American Roller Company High release coatings for printing and coating rollers
DE10129107C2 (en) * 2001-06-16 2003-08-14 Westland Gummiwerke Gmbh & Co Roller for fluid film processing or processing
DE10303119C5 (en) * 2003-01-27 2018-01-04 DS Smith Paper Deutschland GmbH Process for coating a roll body
DE102013222175B4 (en) 2013-10-31 2017-11-09 Koenig & Bauer Ag Printing unit of an offset rotary printing press

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3750250A (en) * 1972-08-31 1973-08-07 Bingham S Co Printer{40 s roller and method of making same
DE2433749A1 (en) * 1974-07-13 1976-01-29 Boettcher Fa Felix TRANSFER ROLLER
EP0343250A1 (en) * 1987-10-05 1989-11-29 Kinyosha Co. Ltd. Inking device and production thereof
DE4028417A1 (en) * 1989-11-02 1991-05-08 Heidelberger Druckmasch Ag COLOR MOVEMENT / FRICTION ROLLER
WO1991018746A1 (en) * 1990-05-31 1991-12-12 Komori Currency Technology Uk Limited Method of, and apparatus for, coating a cylinder
DE19517653A1 (en) * 1994-05-19 1995-12-14 Sauer Druckwalzenfabriken Gmbh Roll for printing machinery and process for applying elastomer cover
DE29510929U1 (en) * 1994-07-14 1996-01-04 Koenig & Bauer-Albert Aktiengesellschaft, 97080 Würzburg Printing unit with short inking unit of a rotary printing machine for direct printing using a waterless planographic printing plate

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3750250A (en) * 1972-08-31 1973-08-07 Bingham S Co Printer{40 s roller and method of making same
DE2433749A1 (en) * 1974-07-13 1976-01-29 Boettcher Fa Felix TRANSFER ROLLER
EP0343250A1 (en) * 1987-10-05 1989-11-29 Kinyosha Co. Ltd. Inking device and production thereof
DE4028417A1 (en) * 1989-11-02 1991-05-08 Heidelberger Druckmasch Ag COLOR MOVEMENT / FRICTION ROLLER
WO1991018746A1 (en) * 1990-05-31 1991-12-12 Komori Currency Technology Uk Limited Method of, and apparatus for, coating a cylinder
DE19517653A1 (en) * 1994-05-19 1995-12-14 Sauer Druckwalzenfabriken Gmbh Roll for printing machinery and process for applying elastomer cover
DE29510929U1 (en) * 1994-07-14 1996-01-04 Koenig & Bauer-Albert Aktiengesellschaft, 97080 Würzburg Printing unit with short inking unit of a rotary printing machine for direct printing using a waterless planographic printing plate

Also Published As

Publication number Publication date
DE19529809C2 (en) 2000-08-03
DE19529809A1 (en) 1997-02-20

Similar Documents

Publication Publication Date Title
DE3850245T2 (en) INK ARRANGEMENT AND PRODUCTION THEREOF.
DE69312999T2 (en) Melting element comprising an adhesive layer based on aminosilane
EP1657076B1 (en) Apparatus for transferring fountain solution and/or printing materials in printing machines
DE69112779T2 (en) Process for coating a roll and roll cover.
DE69107231T2 (en) Thermoplastic elastomer adhesive.
DE3886206T2 (en) INK CYLINDERS FOR A PRINT PRESS AND METHOD FOR THE PRODUCTION THEREOF.
EP3291989B1 (en) Laser engravable pad printing plate
WO1998024631A1 (en) Color processing roller
EP0942833A1 (en) Color processing roller
DE69702258T2 (en) INTERMEDIATE SHEET FOR THERMAL TRANSMISSION PRESSURE
DE10002683A1 (en) Roller with an ink-repellent cover
WO2009144271A1 (en) Roller for printing machine
DE69223365T2 (en) Seal with sealing layer
EP2509797B1 (en) Distributor rollers
DE68922685T2 (en) Inking cylinder for a printing press and manufacturing method of the same.
EP0141217B1 (en) Device for damping printing plates in rotary printing machines
DE19705671A1 (en) Printing machine with a corrosion-protected printing unit cylinder
DE68921978T2 (en) Hydrophobic oleophilic microporous ink rollers.
EP3727868B1 (en) Image-providing printing forme, and method for producing a printing forme
EP0741047B1 (en) Dampening rollers for offset printing press and their manufacture
EP0095608A2 (en) Back-up impression cylinder and process for its manufacture
DE3643281A1 (en) Flat gasket, in particular cylinder-head gasket for combustion engines
DE10204143A1 (en) Printing on non-absorbent substrates especially by drop-on-demand technologies uses a dye take-up layer capable of crosslinking with the ink so as to allow subsequent application of a cover layer
EP1470868A2 (en) Process for coating a cylindrical body
DE68910319T2 (en) Dampening roller for an offset printing press.

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CZ JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 1996946063

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 09319668

Country of ref document: US

WWP Wipo information: published in national office

Ref document number: 1996946063

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 1996946063

Country of ref document: EP