EP0197374B1 - Rouleau et gaine de rouleau d'impression et leur procédé de fabrication - Google Patents

Rouleau et gaine de rouleau d'impression et leur procédé de fabrication Download PDF

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Publication number
EP0197374B1
EP0197374B1 EP86103682A EP86103682A EP0197374B1 EP 0197374 B1 EP0197374 B1 EP 0197374B1 EP 86103682 A EP86103682 A EP 86103682A EP 86103682 A EP86103682 A EP 86103682A EP 0197374 B1 EP0197374 B1 EP 0197374B1
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EP
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Prior art keywords
printing
cylinder
layer
corrosion
molten
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German (de)
English (en)
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EP0197374A1 (fr
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Winfried Heinzel
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    • 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
    • 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
    • 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
    • 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
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
    • 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
    • C23C4/18—After-treatment
    • 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
    • B41N2207/10—Location or type of the layers in shells for rollers of printing machines characterised by inorganic compounds, e.g. pigments

Definitions

  • the invention relates to a printing unit of an offset printing machine with a plate cylinder provided with printing ink, a blanket cylinder running in contact with the plate cylinder and a printing cylinder running in contact with the blanket cylinder, which on its roller base material with a lower, plasma-sprayed, corrosion-resistant layer and a Upper, plasma-sprayed, abrasion-resistant layer is provided, with sheets or sheets of paper to be printed running between the blanket cylinder and the printing cylinder, such that the side of the paper to be printed runs past the blanket cylinder.
  • the invention further relates to a method for producing a printing cylinder for a printing unit of the aforementioned type.
  • a printing unit and a method of the type mentioned above are known from DE-U-71 32 746.
  • the known printing unit or the known method one provides to counteract the chemical and mechanical loads on the printing unit cylinders which are involved in offset printing by applying a wear-resistant and corrosion-resistant layer to the printing unit cylinders.
  • the known method provides for an intermediate layer of nickel aluminide to be applied to the base material of the roller and a layer of armor made of aluminum oxide with titanium oxide in a plasma spraying process.
  • each printing unit of an offset printing machine has a so-called inking unit for printing on sheets or webs, i.e. a plurality of rollers rolling on each other, which serve to distribute a color supplied from a container evenly over the running surface of the rollers.
  • the color is then applied to a so-called plate cylinder, i.e. transfer the cylinder carrying the printing form, for example a film or a metal plate.
  • the writing to be printed or the image to be printed are formed in that the non-image areas are water-absorbing and ink-repellent, while the image areas are water-repellent and ink-absorbing.
  • a so-called dampening system is used to moisten these areas.
  • the plate cylinder in turn rolls on the so-called blanket cylinder, i.e. a cylinder covered with a rubber blanket, which prints the image transferred from the plate cylinder onto the paper by means of indirect printing.
  • the paper is pressed against the blanket cylinder by the so-called impression cylinder.
  • an ink distribution roller of an inking unit of a printing press in which a corrosion-resistant layer made of stainless steel, nickel, titanium or aluminum-titanium is first applied to a metallic base body, and a ceramic layer is applied thereon in the plasma spraying process e.g. consists of aluminum oxide, titanium oxide, chromium oxide and the like.
  • a ceramic layer is applied thereon in the plasma spraying process e.g. consists of aluminum oxide, titanium oxide, chromium oxide and the like.
  • depressions are made by means of a scanned laser beam which do not overlap one another.
  • the surface of the ink distribution roller designed in this way has the purpose of making the distribution of the ink on the surface more uniform and thus making the use of doctor blades and the like unnecessary or at least less critical. This is to be achieved in that the printing ink penetrates into the depressions and, since the depressions are evenly distributed over the surface, is also uniformly distributed over the surface.
  • a printing press cylinder of a general type in which a base material, e.g. Cast iron, steel is first a layer of nickel and / or chrome and then a metal oxide layer is applied.
  • the metal oxide layer has an irregular surface, in which plastic particles, in particular PTFE particles, are additionally embedded. The irregular surface should form an air space between the cylinder surface and a printed sheet, which enables a flutter-free entry into the printing zone.
  • the jacket has a single layer of high adhesive strength applied directly to the base body and an outer layer which is particularly corrosion-resistant and abrasion-resistant.
  • Chromium-nickel-cobalt-boron, chromium-nickel-silicon-boron and chromium-nickel-silicon-molybdenum-boron compounds are specified as materials for this.
  • oxide-ceramic layers and adhesive layers on printing rollers and printing plates are known, according to which certain layers to prevent the electrolytic Stress corrosion of printing rollers and printing plates are to be used. Thereafter, oxide-ceramic layers made of Al 2 0 3 and 1-50% Ti0 2 and heat-resistant adhesive layers made of Ni, Mo, Ni-Al or Cr-Ni alloys are to be used.
  • a method for producing surface layers for dampening rollers is known. Thereafter, a rough surface layer is to be applied to the base body of a dampening roller of an offset printing machine by means of powder coating in a plasma spraying process using powders of the metals chromium, nickel, tungsten, cobalt, their oxides and carbides, which is then treated with a fleece, so that the The tips of the supporting points are broken and rounded and the valleys are cleaned.
  • DE-Z VDI reports 522 “Blechbearbitung'84" also describe that high-power lasers in the multi-kilowatt range make it possible to use a local, low-warpage surface treatment of metallic materials for hardening, alloying or coating highly stressed tools.
  • the invention is based on the object of further developing a printing unit or a method of the type mentioned in such a way that the paper guide when entering and leaving the printing zone without problems, in particular without fluttering and without excessive detaching forces in the paper web or in the printed sheet.
  • this object is achieved in that the corrosion-resistant layer is melted over the entire surface and in that finely distributed depressions are melted into the surface of the abrasion-resistant layer.
  • this object is achieved in accordance with the invention in that a corrosion-resistant layer is applied in a plasma spray process to the roller base material of the printing cylinder, that the corrosion-resistant layer is melted over the entire surface by means of a laser, that an upper, abrasion-resistant layer on the corrosion-resistant layer Plasma spray process is applied, and that finely divided depressions are melted into the surface of the abrasion-resistant layer by means of a laser.
  • the task is completely solved in this way, because the melted-in finely distributed depressions automatically form an effective air cushion between the paper and the cylinder in question, which causes the paper to flutter as it enters the printing zone and excessive release forces when it exits the printing zone certainly diminished.
  • the particular advantage of the invention lies in the fact that, while maintaining the print, even the finest grid or grid forms, an air space is created between the cylinder jacket and the printed sheet, which ensures easy detachment of the printed sheet after printing and a flutter-free entry of the printed sheet into the printing zone, in particular for printing cylinders in sheetfed offset, in perfecting or reverse printing.
  • a first, adhesion-promoting and corrosion-resistant layer preferably consists of Cr, Ni, Al, CrNi, AINi, CrAI or the like. It preferably has a thickness of 15 to 100 ⁇ m.
  • a further, abrasion-resistant layer is preferably designed according to the invention either as a ceramic layer consisting of aluminum oxide, titanium oxide, chromium oxide, aluminum oxide + chromium oxide, aluminum oxide + titanium oxide, chromium oxide + titanium oxide, chromium carbide, chromium carbide + cobalt, tungsten carbide, tungsten carbide cobalt, calcium zirconate or the like it is a metal layer made of molybdenum, cobalt or the like.
  • the abrasion-resistant layer preferably has a thickness of 60 to 300 ⁇ m, preferably 200 ⁇ m.
  • the melting of the layers has the essential advantage over the classic pure plasma spraying process without subsequent melting that a significantly increased adhesion of the layers is achieved because in the plasma spraying process, layers applied without further post-treatment only adhere through pure adhesion, so that there is in principle the risk of peeling off of the sprayed layer.
  • the melting of the depressions by means of the laser has the essential advantage that the position and dimensions of the depressions can be selected and adjusted almost arbitrarily, in particular if one uses a CO z laser which can be easily modulated in intensity. A particularly good effect is achieved in this context by simultaneously melting the outermost layer by means of the laser and melting the depressions in one operation.
  • this is achieved by rotating the printing cylinder about its longitudinal axis at a constant, slow speed in order to melt the depressions and at the same time moving the laser parallel to the longitudinal axis by a slow feed, while a laser beam is directed onto the surface of the printing cylinder and the intensity of the laser beam is modulated.
  • the point of incidence of the laser beam on the surface of the printing cylinder describes a spiral line with a very small pitch, which can be set so small that the entire surface of the printing cylinder is subjected to a laser treatment.
  • the pulse duty factor of the modulation in connection with the speed of the printing cylinder and the feed speed of the laser can be used to apply almost any grid of depressions.
  • the shape of the depressions can be determined by suitably adjusting the modulation, in particular by either switching the laser beam back and forth suddenly between minimum and maximum intensity or modulating it with smooth transitions.
  • the dynamics of the intensity of the laser beam between maximum and minimum power can also be used to form certain forms of depressions.
  • the laser beam is modulated approximately three times per millimeter in length of the line which it describes on the surface of the printing cylinder.
  • the depressions are melted in such a way that they have a sinusoidal or a triangular cross-sectional image in a direction perpendicular to the surface of the layer.
  • the depressions are melted in such a way that their upper openings lie against one another at least approximately in a square-dense grid.
  • An even denser packing of the depressions on the surface can, however, also be achieved in that they abut one another in a hexagonally dense grid.
  • the openings of the depressions overlap one another in at least one coordinate direction. In this way it is ensured that the entire surface of the printing cylinder is subjected to a laser treatment because the zones of subsequent melting of depressions merge into one another.
  • the depressions are melted to a depth of approximately 0.05 to 0.5 mm and to a diameter of approximately 0.1 to 0.5 mm.
  • the printing press has a printing cylinder 1, a blanket cylinder 2 and a plate cylinder 3.
  • An inking unit is 4 and a dampening unit is 5.
  • Transport cylinders 6 and 6 ' are also provided.
  • the inking unit 4 evenly distributes a certain printing ink onto the surface of the plate cylinder 3 which bears the printing ink.
  • the dampening unit 5 with a similar distribution ensures adequate moistening of the surface areas of the plate cylinder 3 provided for this purpose.
  • the plate cylinder 3 runs on the blanket cylinder 2 and transfers the image to be printed or the font to be printed on its elastic surface.
  • the blanket cylinder 2 in turn rolls on the sheet or web that is passed between the blanket cylinder 2 and the impression cylinder 1.
  • a paper sheet along direction 7 first reaches the area of the transport cylinder 6 and is guided from there between the blanket cylinder 2 and the printing cylinder 1. After circulation around the printing cylinder 1, the paper sheet is then conveyed out of the area of the printing unit again by means of a further transport cylinder 6 'in the direction of the arrow 8.
  • the surface of the printing cylinder 1 is now provided with depressions, as will be explained below, this has the effect that the paper sheet runs in flutter-free along the arrow 7 between the blanket cylinder 2 and the printing cylinder 1 and also without Solves problems again from the printing cylinder 1 in order to be delivered to the second transport cylinder 6 '.
  • FIGS. 2b, 3b and 4b represent the layer structure achieved in each case in a greatly enlarged representation.
  • the pressure cylinder 1 is clamped in a device (not shown) in such a way that it can be rotated about its longitudinal axis 11 in the direction of the arrow 12 at a very slow speed.
  • a radial spray gun 13 which can be slowly adjusted in the direction of an arrow 14 parallel to the longitudinal axis 11 of the printing cylinder 1 by means of a feed, also not shown.
  • FIG. 2a a spiral line on the surface of the printing cylinder 1 is indicated in FIG. 2a.
  • a first material 16, which emerges from the plasma spray gun 13, is distributed along this line 15 when the pressure cylinder 1 and the plasma spray gun 13 move in the manner described. It is easy to see that the slope of the spiral line 15 can be adjusted as desired by adjusting the speed of the pressure cylinder 1 and the feed speed of the plasma spray gun 13, as well as the speed at which the plasma spray gun 13 along the line 15 moves.
  • FIG. 2b shows that a first layer 21 can be applied to a roller base material 20 of the printing cylinder 1 in the manner described above.
  • the first layer 21 is an adhesion-promoting and corrosion-resistant layer.
  • the first material 16, from which the first layer 21 is made can be a material that is suitable for this purpose and can be applied in a plasma spraying process, for example Cr, Ni, Al, CrNi, AiNi, CrAI or the like.
  • a second layer 24 is next applied to the adhesion-promoting and corrosion-resistant first layer 21, as shown in FIG. 3b.
  • a further process step is carried out which corresponds to the process step according to FIG. 1a, but with the difference that instead of the first material 16, a second material 23 is sprayed by the plasma spray gun 13.
  • the process parameters in the second process step according to FIG. 3a can differ from those of the first step according to FIG. 2a if this appears advisable due to the specially used second material 23.
  • abrasion-resistant material is used as the second material 23 from which the second layer 24 is made.
  • this can be a ceramic layer which consists of aluminum oxide or titanium oxide or chromium oxide or aluminum oxide + chromium oxide, aluminum oxide + titanium oxide, chromium oxide + titanium oxide, chromium carbide, chromium carbide + cobalt, tungsten carbide, tungsten carbide cobalt, calcium zirconate or the like.
  • a metal layer made of molybdenum, cobalt or the like can also be used as an abrasion-resistant layer.
  • adhesion-promoting and corrosion-resistant layers on the one hand and abrasion-resistant layers on the other hand can also be provided several times in succession.
  • Points 26 indicate that the first two process steps can be followed by further process steps of a similar type, so that overall a structure with more than two layers 21, 24 is formed on the roller base material 20.
  • FIG. 4a shows a further method step in a schematic representation, in which, instead of the plasma spray gun 13, a laser 30 is guided parallel to the longitudinal axis 11 of the printing cylinder 1 by means of a suitable feed.
  • the parameters 12b, 14b and 15b corresponding to the previous method steps can be set appropriately again. This is particularly recommended in view of the fact that the slope of the spiral line 15b is set much smaller than was the case for the lines 15 and 15a, because the point of incidence of the laser beam 31 of the laser 30 is significantly smaller than the spray zone, which is associated with the plasma spray gun 13 is swept over the surface of the printing cylinder 1.
  • the laser 30 can be guided in continuous wave mode along the line 15b in such a way that the entire applied layer 21 or 24 or 21 is melted together with 24 over the entire surface onto the surface of the printing cylinder 1.
  • the process steps according to FIGS. 2, 3 and 4 can be carried out in almost any order by melting the layers 21, 24 either individually or together or in each case over the entire surface in groups.
  • the laser beam 31 can either be switched on and off, i.e. be clocked, but you can also regulate the intensity with soft transitions between a maximum and a minimum intensity value.
  • Specifically distributed recesses 32 are introduced into the at least partially melted layer 24 by modulating the laser beam 31, the position and shape of which depends on the set process parameters.
  • the depressions 32 according to FIG. 5a have a sinusoidal shape in the vertical cross section, while the depressions 32a according to FIG. 5b have a more triangular shape.
  • the depth T of the depressions 32 is approximately 0.05 to 0.5 mm, preferably 0.35 mm and the diameter D is approximately 0.1 to 0.5 mm, preferably 0.11 mm.
  • the diameters D and the depths T of the depressions 32 can be varied within wide limits.
  • FIG. 6 shows an areal distribution with the densest square packing as an example, in which the grid dimensions x and y are the same size in the two coordinate directions and correspond to the upper diameter D of the depressions 32.
  • the depressions 32 can at least partially overlap at least in the direction of the one coordinate, the grid dimension of two partially overlapping depressions 32 being designated by z. From this, the grid dimensions of the two surface coordinates are calculated as az or bz, where a and b are selectable factors and a can have a value of 1.414, for example, while b can have a value of 0.767, in which case the depressions 32 relative to one another are less than 45 ° are aligned. The resulting overlaps of the depressions 32 are designated 35.
  • FIG. 9 shows yet another variant in which the depressions 32 overlap in both coordinate directions, so that overlaps 35 and 36 arise in both coordinate directions.
  • the areal arrangements according to FIGS. 6 to 9, as already mentioned, can be achieved by suitably setting the process parameters. If, for example, the modulation of the laser beam 31 is set to three pulsations per millimeter along the line 15b of FIG. 4a, approximately 800 to 900 depressions 32 per square centimeter are obtained.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Laser Beam Processing (AREA)
  • Paper (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)

Claims (14)

1. Groupe imprimeur d'une imprimeuse offset comprenant un cylindre porte-cliché (3) pourvu d'encre d'imprimerie, un cylindre porte-blanchet (2) en application contre le cylindre porte-cliché (3) et un rouleau d'impression (1) en application contre le cylindre porte-blanchet (2) et dont le matériau de base (20) est recouvert d'une couche inférieure résistant à la corrosion (21) et d'une couche supérieure résistant à l'abrasion (24) déposées par projection au plasma; groupe imprimeur dans lequel les feuilles ou bandes de papier à imprimer passent entre le cylindre porte-blanchet (2) et le rouleau d'impression (1) de manière à ce que le côté de la feuille qui doit être imprimé passe devant le cylindre porte-blanchet (2), caractérisé en ce que la couche résistant à la corrosion (21) est fondue sur toute la surface et en ce que des alvéoles (32), finement réparties, sont gravées à la surface de la couche résistant à l'abrasion (24).
2. Groupe imprimeur selon la revendication 1, caractérisé en ce que la couche adhésive résistant à la corrosion (21) est constituée de Cr, Ni, AI, CrNi, AINi ou de CrAl.
3. Groupe imprimeur selon la revendication 2, caractérisé en ce que la couche adhésive résistant à la corrosion (21) présente une épaisseur comprise entre 15 et 100 pm.
4. Groupe imprimeur selon l'une des revendications 1 à 3, caractérisé en ce que la couche résistant à l'abrasion (24) est une couche céramique en oxyde d'aluminium, oxyde de titane, oxyde de chrome, oxyde d'aluminium + oxyde de chrome, oxyde d'aluminium + oxyde de titane, oxyde de chrome + oxyde de titane, carbure de chrome, carbure de chrome + cobalt, carbure de tungstène, carbure de tungstène + cobalt, zirconate de calcium ou bien une couche métallique de molybdène ou de cobalt.
5. Groupe imprimeur selon la revendication 4, caractérisé en ce que la couche résistant à la corrosion (24) présente une épaisseur comprise entre 60 et 300 pm, de préférence 200 pm.
6. Procédé de fabrication d'un rouleau d'impression pour un groupe imprimeur d'uneimpri- meuse offset comprenant un cylindre porte-cliché (3) pourvu d'encre d'imprimerie, un cylindre porte-blanchet (2) en application contre le cylindre porte-cliché (3) et un rouleau d'impression (1) en application contre le cylindre porte-blanchet (2), dans lequel les feuilles ou bandes de papier à imprimer passent entre le cylindre porte-blanchet (2) et le rouleau d'impression (1) de manière à ce que le côté de la feuille qui doit être imprimé passe devant le cylindre porte-blanchet (2), caractérisé en ce qu'une couche résistant à la corrosion (21) est déposée selon le procédé de projection au plasma sur le matériau de base (20) du rouleau d'impression (1), en ce que la couche résistant à la corrosion (21) est fondue sur toute la surface au moyen d'un laser (30), en ce que sur la couche résistant à la corrosion (21) est déposée une couche supérieure résistant à l'abrasion (24) selon le procédé de projection au plasma et en ce que des alvéoles (32, 32a), finement réparties, sont gravées au moyen d'un laser (30) à la surface de la couche résistant à l'abrasion (24).
7. Procédé selon la revendication 6, caractérisé en ce qu'après l'application de la couche résistant à la corrosion (21), afin de fondre ladite couche (21) sur la totalité de la surface, le rouleau d'impression (1) pivote lentement et à vitesse constante autour de son axe longitudinal (11), tandis qu'un dispositif d'avance lente déplace le laser (30) parallèlement à l'axe longitudinal (11), et qu'un rayon laser (31) est dirigé sur la surface du rouleau d'impression (1), et caractérisé en ce qu'ensuite, la couche résistant à l'abrasion (24) est déposée sur la couche résistant à la corrosion (21) et en ce que, pour graver les alvéoles (32, 32a) dans la couche résistant à l'abrasion (24), le rouleau d'impression (1) pivote lentement et à vitesse constante autour de son axe longitudinal (11), tandis qu'un dispositif d'avance lente déplace le laser (30) parallèlement à l'axe longitudinal (11), et que le rayon laser (31) est dirigé sur la surface du rouleau d'impression (1) et est modulé en intensité.
8. Procédé selon la revendication 7, caractérisé en ce que le rayon laser (31) est modulé environ trois fois par millimètre linéaire sur la courbe (15b), qu'il décrit à la surface du rouleau d'impression (1).
9. Procédé selon l'une des revendications 6 à 8, caractérisé en ce que les alvéoles (32) sont gravées de manière à présenter une section sinusoïdale dans une direction perpendiculaire à la surface de la couche (24).
10. Procédé selon l'une des revendications 6 à 8, caractérisé en ce que les alvéoles (32a) sont gravées de manière à présenter une section triangulaire dans une direction perpendiculaire à la surface de la couche (24).
11. Procédé selon l'une des revendications 6 à 10, caractérisé en ce que les alvéoles (32) sont gravées de manière à ce que leurs ouvertures supérieures soient contiguës et forment au moins approximativement une trame dense carrée (x, y).
12. Procédé selon l'une des revendications 6 à 10, caractérisé en ce que les alvéoles (32) sont gravées de manière à ce que leurs ouvertures supérieures soient contigües et forment au moins approximativement une trame dense hexagonale.
13. Procédé selon la revendication 11 ou 12, caractérisé en ce que les ouvertures se superposent (35, 36) dans au moins une direction de coordonnées.
14. Procédé selon l'une des revendications 6 à 13, caractérisé en ce que les alvéoles (32, 32a) sont gravées avec une profondeur (T) d'environ 0,05 à 0,5 mm et avec un diamètre supérieur (D) d'environ 0,1 à 0,5 mm.
EP86103682A 1985-04-03 1986-03-18 Rouleau et gaine de rouleau d'impression et leur procédé de fabrication Expired - Lifetime EP0197374B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86103682T ATE58559T1 (de) 1985-04-03 1986-03-18 Verfahren zur oberflaechenbehandlung eines druckmaschinenzylinders, druckmaschinenzylinder sowie verwendung derselben.

Applications Claiming Priority (2)

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DE19853512176 DE3512176A1 (de) 1985-04-03 1985-04-03 Verfahren zur oberflaechenbehandlung eines druckmaschinenzylinders
DE3512176 1985-04-03

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EP0197374A1 EP0197374A1 (fr) 1986-10-15
EP0197374B1 true EP0197374B1 (fr) 1990-11-22

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EP86103681A Withdrawn EP0199084A1 (fr) 1985-04-03 1986-03-18 Rouleau et gaine de rouleau d'impression et leur procédé de fabrication
EP86103682A Expired - Lifetime EP0197374B1 (fr) 1985-04-03 1986-03-18 Rouleau et gaine de rouleau d'impression et leur procédé de fabrication

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EP (2) EP0199084A1 (fr)
JP (1) JPS621590A (fr)
AT (1) ATE58559T1 (fr)
DD (1) DD279448A5 (fr)
DE (2) DE3512176A1 (fr)

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NO162957C (no) * 1986-04-30 1990-03-14 Norske Stats Oljeselskap Fremgangsmaate for fremstilling av et kromoksydbelegg.
NL8601119A (nl) * 1986-05-01 1987-12-01 Stork Screens Bv Werkwijze voor het vervaardigen van een bekleed voortbrengsel, onder toepassing van deze werkwijze verkregen dunwandige beklede cylinder, en een dergelijke cylinder omvattende inktoverdrachtswals.
DE3715327A1 (de) * 1987-05-08 1988-11-17 Castolin Sa Verfahren zum herstellen einer verschleissfesten beschichtung
EP0305142A1 (fr) * 1987-08-28 1989-03-01 Corning Glass Works Procédé pour façonner une pièce à la géométrie désirée
DE3808285A1 (de) * 1988-03-12 1989-09-21 Messer Griesheim Gmbh Verfahren zur herstellung harter und verschleissfester oberflaechenschichten
DE3821658A1 (de) * 1988-06-27 1989-12-28 Thyssen Guss Ag Verfahren zur herstellung von korrosionsbestaendigen und verschleissfesten schichten auf walzen von druckmaschinen
DD282248A5 (de) * 1989-03-03 1990-09-05 Textima Veb K Streckwerkwalze einer spinnereimaschine
US4912824A (en) * 1989-03-14 1990-04-03 Inta-Roto Gravure, Inc. Engraved micro-ceramic-coated cylinder and coating process therefor
JPH0819535B2 (ja) * 1989-08-17 1996-02-28 トーカロ株式会社 高温熱処理炉用ロールおよびその製造方法
DE4004620C1 (en) * 1990-02-15 1991-09-05 Du Pont De Nemours (Deutschland) Gmbh, 6380 Bad Homburg, De Photo-structured layer of three=dimensional object prodn. - by using fusible plastisol or organosol contg. unsatd. monomer, photoinitiator and thermally reactive cpd.
AT404905B (de) * 1990-08-03 1999-03-25 Andritz Ag Maschf Anlage zum aufbringen einer spritzschicht auf eine ebene oder gekrümmte fläche eines werkstückes
JPH0440934U (fr) * 1990-08-03 1992-04-07
FR2669846B1 (fr) * 1990-11-30 1994-12-30 Renault Procede pour traiter la surface d'un organe mecanique travaillant par frottement.
FR2692596B1 (fr) * 1992-06-22 1995-03-31 Lorraine Laminage Tôle revêtue et procédé de fabrication de cette tôle.
JP3402368B2 (ja) * 1993-12-27 2003-05-06 アクファーガヴェルト・アクチェンゲゼルシャフト 親水性の層を疎水性の支持体に適用するための熱処理法およびかくして塗被された支持体のオフセット印刷版の支持体としての使用
DE19914136B4 (de) * 1999-03-27 2009-02-26 Koenig & Bauer Aktiengesellschaft Oberfläche für Maschinenteile in Druckmaschinen
JP5752473B2 (ja) * 2011-04-15 2015-07-22 日鉄住金ハード株式会社 輪転機用のローラー及び輪転機用のローラーの製造方法
EP2535437A1 (fr) * 2011-06-16 2012-12-19 RH Optronic ApS Procédé de revêtement au plasma de rouleaux et rouleau revêtu au plasma
DE102012102087A1 (de) * 2012-03-13 2013-09-19 Thermico Gmbh & Co. Kg Bauteil mit einer metallurgisch angebundenen Beschichtung

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Also Published As

Publication number Publication date
EP0199084A1 (fr) 1986-10-29
ATE58559T1 (de) 1990-12-15
DD279448A5 (de) 1990-06-06
DE3512176A1 (de) 1986-10-09
EP0197374A1 (fr) 1986-10-15
DE3512176C2 (fr) 1988-05-19
DE3675676D1 (de) 1991-01-03
JPS621590A (ja) 1987-01-07

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