WO2011072403A1 - Procédé de fabrication d'un rouleau doseur convenant particulièrement à l'impression flexographique et rouleau doseur obtenu au moyen de ce procédé - Google Patents

Procédé de fabrication d'un rouleau doseur convenant particulièrement à l'impression flexographique et rouleau doseur obtenu au moyen de ce procédé Download PDF

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Publication number
WO2011072403A1
WO2011072403A1 PCT/CH2009/000402 CH2009000402W WO2011072403A1 WO 2011072403 A1 WO2011072403 A1 WO 2011072403A1 CH 2009000402 W CH2009000402 W CH 2009000402W WO 2011072403 A1 WO2011072403 A1 WO 2011072403A1
Authority
WO
WIPO (PCT)
Prior art keywords
hard material
coating
metering roll
process according
layer
Prior art date
Application number
PCT/CH2009/000402
Other languages
English (en)
Inventor
Gregor Langer
Laurent De Schoulepnikoff
Original Assignee
Terolab Surface Group S.A.
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
Application filed by Terolab Surface Group S.A. filed Critical Terolab Surface Group S.A.
Priority to EP09796287.2A priority Critical patent/EP2512816B1/fr
Priority to PCT/CH2009/000402 priority patent/WO2011072403A1/fr
Publication of WO2011072403A1 publication Critical patent/WO2011072403A1/fr

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
    • B41N7/005—Coating of the composition; Moulding; Reclaiming; Finishing; Trimming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/26—Construction of 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
    • 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

Definitions

  • the present invention concerns a process for manufacturing a metering roll especially usable in flexographic printing presses, in varnish stations for offset presses and/or in short ink train dry offset presses for example, comprising a central cylindrical core and at least one layer of a hard material peripheral coating.
  • the present invention concerns also a metering roll, especially usable in flexographic printing presses, in varnish stations for offset presses and/or in short ink train dry offset presses for example, comprising a central cylindrical core and at least one layer of a hard material peripheral coating, obtained by this process.
  • anilox rolls are widely used to bring a metered quantity of ink to the plate roll with which it is in contact.
  • the surface layer of the peripheral coating is usually ceramic or metal or a metallic component or alloy, as a metal oxide or carbonate for example. This layer is engraved, mainly by use of a laser beam.
  • a first step consisting in removing the old coating by mechanical methods, like grinding, blasting. This operation is complicated and time- consuming because the coating is made of a hard material not easy to remove.
  • a second step consisting in applying a new coating on the turned or grinded and corundum-blasted surface of the anilox roll.
  • the process of the invention offers a new technology permitting to refurbish the anilox rolls much more easily, more quickly and at lower costs.
  • This invention is preferably based on an idea of improving the usual process for manufacturing a metering roll, so-called "anilox roll”. It is also based on the aim to reduce the number of steps and simplify the operations and consequently decrease the cost to refurbish used metering rolls.
  • the process of the present invention such as defined in the preamble is characterized in that it comprises at least a first step of melting superficially at least partially the hard material coating, a second step of solidifying said melted hard material, and a third step of engraving the said solidified layer of hard material.
  • the first step consists in melting a superficial layer of a rough coating of hard material located on the cylindrical core of a new metering roll to provide a flat smooth surface without any unevenness ready to be engraved.
  • the first step consists in melting at least partially the hard material coating of a used metering roll at a depth sufficient to remove any unevenness of the surface to provide a flat smooth surface without any unevenness ready to be engraved.
  • the first step may be performed preferably by a laser beam. According to an alternative solution, the first step may be performed by a plasma torch.
  • Said hard material coating obtained during the second step comprises preferably at least a ceramic, at least a metal or at least a metallic component.
  • the third step is preferably performed with at least one laser beam, or a similar technology.
  • the metering roll such as defined in the preamble is characterized in that said coating comprises a superficially and at least partially melted and solidified layer presenting a flat surface layer without any unevenness, said flat surface being engraved.
  • said coating is a rough material deposited on said cylindrical core of a new metering roll.
  • said coating is a superficial layer of a used metering roll, said layer being obtained by melting at least partially a previously engraved coating at a depth sufficient to remove the existing engraving.
  • Figure 1 is a cut view showing partially the surface of an anilox roll to be refurbished according to the process of the present invention
  • Figure 2 is a similar view as in figure 1 , showing a layer of the melted hard material according to one step of the process of the present invention
  • Figure 3 is a similar view as in figures 1 and 2, showing a new layer of the hard material engraved according to a further step of the process of the present invention.
  • the process of the invention may be used as well for manufacturing new metering rolls as for refurbishing used metering or so-called anilox rolls.
  • the process permits to modify the properties of the peripheral coating, especially the surface tension, the porosity, the hardness.
  • the process permits to reduce the costs of a life extension of the used metering rolls. Further it is also possible to modify the properties of the coating like for new rolls.
  • the steps for refurbishing used anilox rolls are the following :
  • This operation may be done with a focused laser beam.
  • the hard material coating can be engraved again with a laser beam within the re-melted zone.
  • Figure 1 shows partially the surface of a so-called anilox roll 10 to be refurbished according to the process of the invention. It comprises a central cylindrical core 11 and at least one layer 12 of a hard material peripheral coating. In the drawing only one layer is shown, but the coating could be formed of a plurality of different layers having each another composition and/or properties.
  • the outer part 13 of the layer 12 is engraved, preferably by use of a laser beam (not shown).
  • Figure 2 shows the anilox roll 10 with a part 14 of the coating of hard material 12, including the engraved outer part 13, melted by a laser beam 5, on a thickness that is deeper than the depth of the existing textured layer 13.
  • Figure 3 shows the anilox roll 10 having a melted and solidified layer 16 of a hard material recovering the coating 12 and being provided with a new engraving 17 made by at least one laser beam.
  • This process according to the invention permits to withdraw the steps (a) to (c) of the prior art technology commonly used for refurbishing anilox rolls.
  • Relating to the manufacture of new metering rolls according to the usual process the hard material structured surface is realized in at least three steps: a first step consisting in applying a rough layer of a hard material, a second step consisting in grinding and polishing the surface of the rough layer of hard material, i.e. by diamond bands, and
  • the grinding and polishing as a second step should be replaced by laser melting and smoothening of the hard material that solidifies and forms a smooth and flat surface. Jn any case, the steps of grinding and polishing with diamond bands or similar will be saved.
  • the physical properties, i.e. the mechanical resistance or other specifications may be adapted to special applications of the metering rolls by choosing the appropriate hard material and laser parameter settings.
  • the densified and smoothened hard material coating can be engraved with a laser beam.

Landscapes

  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un rouleau doseur convenant particulièrement à des presses à impression flexographique, à des postes de vernis pour des presses offset et/ou à des presses offset à sec à courts trains d'encre par exemple, comprenant un cœur central cylindrique (11) et au moins une couche (12) d'enrobage périphérique en matière dure qui est gravée au faisceau laser. Le procédé comprend au moins une première étape consistant à réaliser la fusion superficielle au moins partielle de l'enrobage en matière dure, une deuxième étape au cours de laquelle la matière dure fondue se solidifie et forme une surface plane sans gravure et une troisième étape consistant à graver une nouvelle fois l'enrobage en matière dure au faisceau laser au sein de la zone siège de la fusion.
PCT/CH2009/000402 2009-12-18 2009-12-18 Procédé de fabrication d'un rouleau doseur convenant particulièrement à l'impression flexographique et rouleau doseur obtenu au moyen de ce procédé WO2011072403A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP09796287.2A EP2512816B1 (fr) 2009-12-18 2009-12-18 Procédé de fabrication d'un rouleau doseur convenant particulièrement à l'impression flexographique
PCT/CH2009/000402 WO2011072403A1 (fr) 2009-12-18 2009-12-18 Procédé de fabrication d'un rouleau doseur convenant particulièrement à l'impression flexographique et rouleau doseur obtenu au moyen de ce procédé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH2009/000402 WO2011072403A1 (fr) 2009-12-18 2009-12-18 Procédé de fabrication d'un rouleau doseur convenant particulièrement à l'impression flexographique et rouleau doseur obtenu au moyen de ce procédé

Publications (1)

Publication Number Publication Date
WO2011072403A1 true WO2011072403A1 (fr) 2011-06-23

Family

ID=42732504

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH2009/000402 WO2011072403A1 (fr) 2009-12-18 2009-12-18 Procédé de fabrication d'un rouleau doseur convenant particulièrement à l'impression flexographique et rouleau doseur obtenu au moyen de ce procédé

Country Status (2)

Country Link
EP (1) EP2512816B1 (fr)
WO (1) WO2011072403A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0615861A1 (fr) * 1993-03-15 1994-09-21 MAN Roland Druckmaschinen AG Procédé pour régler la quantité d'encre transférée par un rouleau anilox ainsi que pour rénover des rouleaux anilox usés et construction d'un rouleau anilox qui peut être rénové
GB2423053A (en) 2005-02-10 2006-08-16 Bernard John Boyle Laser engraved liquid metering roller
EP1967381A2 (fr) * 2007-03-08 2008-09-10 Kurt Zecher GmbH Cylindre gravé pour presses et procédé de fabrication

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0615861A1 (fr) * 1993-03-15 1994-09-21 MAN Roland Druckmaschinen AG Procédé pour régler la quantité d'encre transférée par un rouleau anilox ainsi que pour rénover des rouleaux anilox usés et construction d'un rouleau anilox qui peut être rénové
GB2423053A (en) 2005-02-10 2006-08-16 Bernard John Boyle Laser engraved liquid metering roller
EP1967381A2 (fr) * 2007-03-08 2008-09-10 Kurt Zecher GmbH Cylindre gravé pour presses et procédé de fabrication

Also Published As

Publication number Publication date
EP2512816B1 (fr) 2015-03-25
EP2512816A1 (fr) 2012-10-24

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