EP2512817B1 - Process for manufacturing a metering roll especially usable for printing and metering roll obtained by this process - Google Patents
Process for manufacturing a metering roll especially usable for printing and metering roll obtained by this process Download PDFInfo
- Publication number
- EP2512817B1 EP2512817B1 EP09796288.0A EP09796288A EP2512817B1 EP 2512817 B1 EP2512817 B1 EP 2512817B1 EP 09796288 A EP09796288 A EP 09796288A EP 2512817 B1 EP2512817 B1 EP 2512817B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- proportion
- process according
- chrome
- metering roll
- nickel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 31
- 238000007639 printing Methods 0.000 title claims description 8
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 48
- 238000000576 coating method Methods 0.000 claims description 37
- 239000011248 coating agent Substances 0.000 claims description 32
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 28
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 24
- 229910052759 nickel Inorganic materials 0.000 claims description 23
- 229910052799 carbon Inorganic materials 0.000 claims description 20
- 230000002093 peripheral effect Effects 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
- 229910052750 molybdenum Inorganic materials 0.000 claims description 12
- 229910052796 boron Inorganic materials 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 10
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 10
- 239000011733 molybdenum Substances 0.000 claims description 10
- 239000010703 silicon Substances 0.000 claims description 10
- 229910000684 Cobalt-chrome Inorganic materials 0.000 claims description 9
- 239000010952 cobalt-chrome Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 238000010285 flame spraying Methods 0.000 claims description 8
- 239000011572 manganese Substances 0.000 claims description 8
- 229910052748 manganese Inorganic materials 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 7
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 229910017052 cobalt Inorganic materials 0.000 claims description 4
- 239000010941 cobalt Substances 0.000 claims description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 4
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 4
- 238000007750 plasma spraying Methods 0.000 claims description 4
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 4
- 239000002966 varnish Substances 0.000 claims description 4
- 238000007751 thermal spraying Methods 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 238000007774 anilox coating Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 7
- 239000000976 ink Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 150000001247 metal acetylides Chemical class 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- WAIPAZQMEIHHTJ-UHFFFAOYSA-N [Cr].[Co] Chemical compound [Cr].[Co] WAIPAZQMEIHHTJ-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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
- B41N2207/10—Location or type of the layers in shells for rollers of printing machines characterised by inorganic compounds, e.g. pigments
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.
- the metering rolls are widely used to bring a metered quantity of ink to the plate roll with which it is in contact.
- One type of metering rolls is provided with a peripheral coating of ceramic that is engraved, mainly by use of a laser beam.
- Another type of metering rolls has a metallic surface layer that is engraved either by mechanical tools or by use of a laser beam. The surface layer is more often made of a soft metal like copper or tin and is chrome plated after the engraving.
- Another prior art method consists in a chemical etching of an image that is illuminated by a laser beam or similar.
- the United States Patent Nr. 5,514,064 describes a process for making metal inking rolls, particularly for flexographic printing having a roll structure composed of an ammonia hardenable steel, in particular stainless steel.
- the UK patent application GB 2 089 473 A relates to an ink doctor roller for printing machines, especially a doctor roller comprising a base body of steel provided with a circumferential covering comprising a sprayed outer layer of wear-resistant material in which a low friction material is embedded in islands.
- the international application WO 91/13762 relates to a screen roller comprising a cylindrical roller body and shaft means with a pattern of recesses present on the external surface of the roller body, in which the pattern of recesses is present in an electroplated metal layer which is of a hardness being greater than the hardness of the metal of the roller body.
- the technical features which are required for metering rolls, and especially for their superficial coating layer are the following: easiness of the engraving, high resistance to mechanical wear, protection against corrosion due for example to aggressive cleaning products.
- a ceramic coating is sensitive to corrosive liquids because it is somewhat porous and though it has a great hardness the liquids may penetrate into the coating and reach the lower layers and the central core of the roll.
- One solution consists in filling up the pores with additional components mixed with the ceramic mixture.
- the coating is made of a soft metal, it is necessary to chrome plate the upper layer to harden the surface and increase its resistance.
- the scraper for metering the printing inks is applied with a high compression on the surface of the upper layer of the metering roll. Due to the hard material of the coating and the sharp edges of the structured surface, the scraper is submitted to an intensive wear.
- the process of the invention offers a new technology permitting to a manufacture metering roll, having an improved resistance to mechanical wear, a better protection to corrosion at lower costs, and remaining easy to engrave.
- the process of the present invention such as defined in the preamble is characterized in that the peripheral coating is made of an iron base containing at least one of the elements of the group consisting of chrome, nickel, boron, carbon, molybdenum, silicon, manganese, cobalt and/or at least one of the components of the group consisting of chrome carbide (Cr 3 C 2 ); nickel chrome (NiCr); cobalt chrome (CoCr); tungsten carbide (WC), the peripheral coating being provided by thermal spraying including at least one of the following methods: flame spraying, electrical arc spraying, plasma spraying, high velocity oxy flame spraying or cold gas spraying.
- the proportion of chrome is advantageously comprised between 20 and 35%. According to one preferred variant, the proportion of chrome is at least approximately 32%.
- the proportion of chrome is at least approximately 27%
- the proportion of nickel is advantageously comprised between 0 and 20%.
- the proportion of nickel is at least approximately 16%.
- the proportion of nickel is at least approximately 8%.
- the proportion of boron is advantageously comprised between 0 and 8%. According to one preferred variant the proportion of boron is at least approximately 4.6%.
- the proportion of carbon is advantageously comprised between 0 and 3%.
- the proportion of carbon is at least approximately 0.6%.
- the proportion of carbon is at least approximately 2%.
- the proportion of molybdenum is advantageously comprised between 0 and 8%.
- the proportion of molybdenum is at least approximately 4%.
- the proportion of silicon is advantageously comprised between 0 and 2% and preferably between 1 and 3%.
- the proportion of silicon is at least approximately 1.2%.
- the proportion of manganese is advantageously comprised between 0 and 3%.
- the proportion of manganese is at least approximately 0.7%.
- the metering roll, of the present invention such as defined in the preamble is characterized in that the peripheral coating is made of an iron base containing at least one of the elements of the group consisting of chrome, nickel, boron, carbon, molybdenum, silicon, manganese, cobalt and/or at least one of the components of the group consisting of chrome carbide (Cr 3 C 2 ); nickel chrome (NiCr); cobalt chrome (CoCr); tungsten carbide (WC), Ni and Co and in that the thickness of this peripheral coating is comprised between 50 and 400 micrometers.
- chrome carbide Cr 3 C 2
- NiCr nickel chrome
- CoCr cobalt chrome
- WC tungsten carbide
- the coating is advantageously composed of an iron base with 32% chrome, 8% nickel, 4.6% boron, 0.6% carbon of the total weight.
- the coating is composed of an iron base with 27% chrome, 16% nickel, 4% molybdenum, 2% carbon, 1.2% silicon, 0.7% manganese of the total weight.
- the coating may be composed of a WC-Ni base containing at least one of the following additional elements: Mo, Cr, C, and the amount of Ni may be at least approximately 8.5%.
- the amount of Ni is at least approximately 8.5%
- the amount of Mo is at least approximately 2.2%
- the amount of Cr is at least approximately 2.2%
- the amount of C is at least approximately 5.7%.
- the coating may be composed of a WC-Fe base containing at least one of the following additional elements: C, Cr, Al, and the amount of Fe may be at least approximately 10.8%.
- the amount of Fe is at least approximately 10.8%, the amount of C is at least approximately 5.6%, the amount of Cr is at least approximately 3.4% and the amount of Al is at least approximately 1%.
- the process of the invention may be used for manufacturing new metering rolls, having a central cylindrical metallic core.
- the coating is provided by thermal spraying including at least one of the following methods: flame spraying, electrical arc spraying, plasma spraying, high velocity oxy flame spraying or cold gas spraying.
- flame spraying electrical arc spraying
- plasma spraying high velocity oxy flame spraying or cold gas spraying.
- the plasma spraying provides a coating porosity that is higher than the porosity provided by high speed flame spraying
- the thickness of the coating is comprised between 50 and 400 micrometers relating to the components that are used and the application planned for the rolls.
- the resulting corrosion resistance of the coating is higher than 500 hours according the (AASS-test).
- the hardness of the iron base alloys coating is preferably comprised between 750 and 1000 HV 0.1
- the hardness of cermets coatings (carbides coatings) is comprised between 800 and 1600 HV 0.1 . It is to be noted that the hardness of the carbides is much higher than that of the base alloys coatings. However the engraving is harder to do.
- the materials that are used to realize the coatings of the rolls may be included in a first group of iron alloys and in a second group of carbides.
- the coatings of variant 1 and variant 2 are preferably applied by means of an atmospheric spraying or by means of a high velocity oxy flame spraying.
- Gas projection apparatus or liquid projection apparatus may be used for applying the said elements.
- Both groups of materials are particularly resistant to mechanical wear and corrosion so that the combination of structured rolls and the scraper will have a higher resistance and a longer working life as a ceramic surface.
- the coating surface may be structured directly by a laser beam without any further preparation like masking or etching.
Landscapes
- Coating By Spraying Or Casting (AREA)
- Rolls And Other Rotary Bodies (AREA)
Description
- 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.
- The metering rolls, are widely used to bring a metered quantity of ink to the plate roll with which it is in contact. One type of metering rolls, is provided with a peripheral coating of ceramic that is engraved, mainly by use of a laser beam. Another type of metering rolls, has a metallic surface layer that is engraved either by mechanical tools or by use of a laser beam. The surface layer is more often made of a soft metal like copper or tin and is chrome plated after the engraving.
- Another prior art method consists in a chemical etching of an image that is illuminated by a laser beam or similar.
- The United States Patent Nr.
5,514,064 describes a process for making metal inking rolls, particularly for flexographic printing having a roll structure composed of an ammonia hardenable steel, in particular stainless steel. - The UK patent application
GB 2 089 473 A - The international application
WO 91/13762 - The technical features which are required for metering rolls, and especially for their superficial coating layer are the following: easiness of the engraving, high resistance to mechanical wear, protection against corrosion due for example to aggressive cleaning products. In particular a ceramic coating is sensitive to corrosive liquids because it is somewhat porous and though it has a great hardness the liquids may penetrate into the coating and reach the lower layers and the central core of the roll. One solution consists in filling up the pores with additional components mixed with the ceramic mixture. When the coating is made of a soft metal, it is necessary to chrome plate the upper layer to harden the surface and increase its resistance.
- Furthermore the scraper for metering the printing inks is applied with a high compression on the surface of the upper layer of the metering roll. Due to the hard material of the coating and the sharp edges of the structured surface, the scraper is submitted to an intensive wear.
- The process of the invention offers a new technology permitting to a manufacture metering roll, having an improved resistance to mechanical wear, a better protection to corrosion at lower costs, and remaining easy to engrave.
- Therefore, the process of the present invention such as defined in the preamble is characterized in that the peripheral coating is made of an iron base containing at least one of the elements of the group consisting of chrome, nickel, boron, carbon, molybdenum, silicon, manganese, cobalt and/or at least one of the components of the group consisting of chrome carbide (Cr3C2); nickel chrome (NiCr); cobalt chrome (CoCr); tungsten carbide (WC), the peripheral coating being provided by thermal spraying including at least one of the following methods: flame spraying, electrical arc spraying, plasma spraying, high velocity oxy flame spraying or cold gas spraying.
- The proportion of chrome is advantageously comprised between 20 and 35%. According to one preferred variant, the proportion of chrome is at least approximately 32%.
- According to another preferred variant, the proportion of chrome is at least approximately 27%
- The proportion of nickel is advantageously comprised between 0 and 20%.
- According to one preferred variant, the proportion of nickel is at least approximately 16%.
- According to another preferred variant, the proportion of nickel is at least approximately 8%.
- The proportion of boron is advantageously comprised between 0 and 8%. According to one preferred variant the proportion of boron is at least approximately 4.6%.
- The proportion of carbon is advantageously comprised between 0 and 3%.
- According to one preferred variant the proportion of carbon is at least approximately 0.6%.
- According to another preferred variant, the proportion of carbon is at least approximately 2%.
- The proportion of molybdenum is advantageously comprised between 0 and 8%.
- According to one preferred variant, the proportion of molybdenum is at least approximately 4%.
- The proportion of silicon is advantageously comprised between 0 and 2% and preferably between 1 and 3%.
- According to one preferred variant, the proportion of silicon is at least approximately 1.2%.
- The proportion of manganese is advantageously comprised between 0 and 3%.
- According to one variant, the proportion of manganese is at least approximately 0.7%.
- The metering roll, of the present invention such as defined in the preamble is characterized in that the peripheral coating is made of an iron base containing at least one of the elements of the group consisting of chrome, nickel, boron, carbon, molybdenum, silicon, manganese, cobalt and/or at least one of the components of the group consisting of chrome carbide (Cr3C2); nickel chrome (NiCr); cobalt chrome (CoCr); tungsten carbide (WC), Ni and Co and in that the thickness of this peripheral coating is comprised between 50 and 400 micrometers.
- According to one preferred embodiment of the metering roll, the coating is advantageously composed of an iron base with 32% chrome, 8% nickel, 4.6% boron, 0.6% carbon of the total weight.
- According to another preferred embodiment of the metering roll, the coating is composed of an iron base with 27% chrome, 16% nickel, 4% molybdenum, 2% carbon, 1.2% silicon, 0.7% manganese of the total weight.
- According to a first variant, not forming part of the invention, the coating may be composed of a WC-Ni base containing at least one of the following additional elements: Mo, Cr, C, and the amount of Ni may be at least approximately 8.5%.
- When the amount of Ni is at least approximately 8.5%, the amount of Mo is at least approximately 2.2%, the amount of Cr is at least approximately 2.2% and the amount of C is at least approximately 5.7%.
- According to a second variant, the coating may be composed of a WC-Fe base containing at least one of the following additional elements: C, Cr, Al, and the amount of Fe may be at least approximately 10.8%.
- When the amount of Fe is at least approximately 10.8%, the amount of C is at least approximately 5.6%, the amount of Cr is at least approximately 3.4% and the amount of Al is at least approximately 1%.
- The process of the invention may be used for manufacturing new metering rolls, having a central cylindrical metallic core. The coating is provided by thermal spraying including at least one of the following methods: flame spraying, electrical arc spraying, plasma spraying, high velocity oxy flame spraying or cold gas spraying. After the application of the coating on the surface of the roll, it is first grinded then polished. Afterwards the coating is engraved with a laser beam or by mechanical tools. A further grinding and polishing operation may be necessary for withdrawing remaining protrusions.
- It is to be noted that the plasma spraying provides a coating porosity that is higher than the porosity provided by high speed flame spraying
- The thickness of the coating is comprised between 50 and 400 micrometers relating to the components that are used and the application planned for the rolls. The resulting corrosion resistance of the coating is higher than 500 hours according the (AASS-test). The hardness of the iron base alloys coating is preferably comprised between 750 and 1000 HV 0.1, the hardness of cermets coatings (carbides coatings) is comprised between 800 and 1600 HV 0.1. It is to be noted that the hardness of the carbides is much higher than that of the base alloys coatings. However the engraving is harder to do.
- According to the invention, the materials that are used to realize the coatings of the rolls may be included in a first group of iron alloys and in a second group of carbides.
- Group I : Cr 20-35%; Ni 0-20%; Mo 0-8%; B 0-8%; C 0-3%; Si 0-2%; Mn 0-3%; other elements < 0,1%.
- Variant 1: Preferred composition: Fe Base, Cr 32%, Ni 8%, B 4,6%, C 0,6%.
- Variant 2: Preferred composition: Fe Base, Cr 27%, Ni 16%, C 2%, Si 1,2%, Mn 0,7%.
- Group II : Carbide materials (Cermets) WC; Cr3C2 in various matrixes with Ni, CoCr and NiCr and Ni or Fe base alloys containing Fe 0-13%; Cr 0-5%; Ni 0-25%; C 0-5%; Mo 0-4%; Al 0-2%; traces < 1%, the rest being WC and/or Cr3C2 or alloys.
- Variant 3, not forming part of the invention: WC-Ni-Base (Hastelloy-C) Ni 8,5%; Mo 2,2%; C 5,7% and traces of various elements < 1%.
- Variant 4: WC-Fe base : Fe 10,8%; C 5,6%; Cr 3,4%; Al 1%.
- The coatings of variant 1 and variant 2 are preferably applied by means of an atmospheric spraying or by means of a high velocity oxy flame spraying. Gas projection apparatus or liquid projection apparatus may be used for applying the said elements.
- Both groups of materials are particularly resistant to mechanical wear and corrosion so that the combination of structured rolls and the scraper will have a higher resistance and a longer working life as a ceramic surface. The coating surface may be structured directly by a laser beam without any further preparation like masking or etching.
Claims (25)
- 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, characterized in that the peripheral coating is made of an iron base containing at least one of the elements of the group consisting of chrome, nickel, boron, carbon, molybdenum, silicon, manganese, cobalt and/or at least one of the components of the group consisting of chrome carbide (Cr3C2); nickel chrome (NiCr); cobalt chrome (CoCr); tungsten carbide (WC), the peripheral coating being provided by thermal spraying including at least one of the following methods: flame spraying, electrical arc spraying, plasma spraying, high velocity oxy flame spraying or cold gas spraying.
- A process according to claim 1, characterized in that the proportion of chrome is comprised between 20 and 35%.
- A process according to claim 2, characterized in that the proportion of chrome is at least 32%.
- A process according to claim 2, characterized in that the proportion of chrome is at least 27%.
- A process according to claim 1, characterized in that the proportion of nickel is comprised between 0 and 20%.
- A process according to claim 5, characterized in that the proportion of nickel is at least 16%.
- A process according to claim 5, characterized in that the proportion of nickel is at least 8%.
- A process according to claim 1, characterized in that the proportion of boron is comprised between 0 and 8%.
- A process according to claim 8, characterized in that the proportion of boron is at least 4.6%.
- A process according to claim 1, characterized in that the proportion of carbon is comprised between 0 and 3%.
- A process according to claim 10, characterized in that the proportion of carbon is at least 0.6%.
- A process according to claim 10, characterized in that the proportion of carbon is at least 2%.
- A process according to claim 1, characterized in that the proportion of molybdenum is comprised between 0 and 8%.
- A process according to claim 13, characterized in that the proportion of molybdenum is at least 4%.
- A process according to claim 1, characterized in that the proportion of silicon is comprised between 0 and 2% and preferably between 1 and 2%.
- A process according to claim 15, characterized in that the proportion of silicon is at least 1.2%.
- A process according to claim 1, characterized in that the proportion of manganese is comprised between 0 and 3%.
- A process according to claim 17, characterized in that the proportion of manganese is at least 0.7%.
- 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, obtained by the process according to the preceding claims, said metering roll or similar, usually known as Anilox roll or sleeve, comprising a central cylindrical metallic core and at least one layer of a hard material peripheral coating, characterized in that the peripheral coating is made of an iron base containing at least one of the elements of the group consisting of chrome, nickel, boron, carbon, molybdenum, silicon, manganese, cobalt and/or at least one of the components of the group consisting of chrome carbide (Cr3C2); nickel chrome (NiCr); cobalt chrome (CoCr); tungsten carbide (WC), and in that the thickness of the coating is comprised between 50 and 400 micrometers.
- A metering roll, according to claim 19, characterized in that the peripheral coating is composed of an iron base with 32% chrome, 8% nickel, 4.6% boron, 0.6% carbon of the total weight.
- A metering roll, according to claim 19, characterized in that the peripheral coating is composed of an iron base with 27% chrome, 16% nickel, 4% molybdenum, 2% carbon, 1.2% silicon, 0.7% manganese of the total weight.
- A metering roll, according to claim 19, characterized in that the peripheral coating contains at least one of the following additional elements: Mo, Cr, C, Ni.
- A metering roll, according to claim 19, characterized in that the peripheral coating is composed of a WC-Fe base containing at least one of the following additional elements: C, Cr, Al.
- A metering roll, according to claim 23, characterized in that the amount of Fe is at least 10.8%.
- A metering roll, according to claim 23, characterized in that the amount of Fe is at least 10.8%, the amount of C is at least 5.6%, the amount of Cr is at least 3.4% and the amount of Al is at least 1 %.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CH2009/000403 WO2011072404A1 (en) | 2009-12-18 | 2009-12-18 | Process for manufacturing a metering roll especially usable for printing and metering roll obtained by this process |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2512817A1 EP2512817A1 (en) | 2012-10-24 |
EP2512817B1 true EP2512817B1 (en) | 2016-08-03 |
Family
ID=42735390
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09796288.0A Active EP2512817B1 (en) | 2009-12-18 | 2009-12-18 | Process for manufacturing a metering roll especially usable for printing and metering roll obtained by this process |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2512817B1 (en) |
PL (1) | PL2512817T3 (en) |
WO (1) | WO2011072404A1 (en) |
Families Citing this family (3)
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CH708303B1 (en) * | 2013-07-11 | 2019-02-15 | Terolab Surface Group Sa | Process for coating the cylindrical surface of a screen sleeve for a printing press and screen sleeve prepared according to this method. |
US11613796B2 (en) * | 2018-01-31 | 2023-03-28 | Hitachi Metals, Ltd. | Cemented carbide and composite cemented carbide roll for rolling |
CN108203826A (en) * | 2018-02-01 | 2018-06-26 | 张文秀 | A kind of quick intensifying method of roller roller |
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US3924313A (en) * | 1974-05-24 | 1975-12-09 | Standex Int Corp | Metal applicator roll |
DD154087A1 (en) * | 1980-12-12 | 1982-02-24 | Hans Johne | ink fountain roller |
US5514064A (en) | 1987-08-20 | 1996-05-07 | Della Torre; Renato | Process and means for making metal inking rolls |
NL9000596A (en) * | 1990-03-15 | 1991-10-01 | Stork Screens Bv | GRID ROLL WITH A PATTERN COATING IN A GALVANIC TOP COAT AND ROLL BODY FOR SUCH A ROLLER. |
-
2009
- 2009-12-18 PL PL09796288T patent/PL2512817T3/en unknown
- 2009-12-18 WO PCT/CH2009/000403 patent/WO2011072404A1/en active Application Filing
- 2009-12-18 EP EP09796288.0A patent/EP2512817B1/en active Active
Also Published As
Publication number | Publication date |
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PL2512817T3 (en) | 2017-09-29 |
EP2512817A1 (en) | 2012-10-24 |
WO2011072404A1 (en) | 2011-06-23 |
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