EP2535437A1 - Procédé de revêtement au plasma de rouleaux et rouleau revêtu au plasma - Google Patents

Procédé de revêtement au plasma de rouleaux et rouleau revêtu au plasma Download PDF

Info

Publication number
EP2535437A1
EP2535437A1 EP11170262A EP11170262A EP2535437A1 EP 2535437 A1 EP2535437 A1 EP 2535437A1 EP 11170262 A EP11170262 A EP 11170262A EP 11170262 A EP11170262 A EP 11170262A EP 2535437 A1 EP2535437 A1 EP 2535437A1
Authority
EP
European Patent Office
Prior art keywords
plasma
roll
plume
passes
coating
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.)
Withdrawn
Application number
EP11170262A
Other languages
German (de)
English (en)
Inventor
Rudi Marcel Hohrmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RH Optronic ApS
Original Assignee
RH Optronic ApS
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 RH Optronic ApS filed Critical RH Optronic ApS
Priority to EP11170262A priority Critical patent/EP2535437A1/fr
Publication of EP2535437A1 publication Critical patent/EP2535437A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • B41N7/00—Shells for rollers of printing machines
    • B41N7/005—Coating of the composition; Moulding; Reclaiming; Finishing; Trimming
    • 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
    • C23C4/11—Oxides
    • 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
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/134—Plasma spraying
    • 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
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/14—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying for coating elongate material
    • C23C4/16—Wires; Tubes
    • 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 relates to plasma-coating of rolls, such as anilox rolls.
  • An anilox roll is a cylinder used to deliver a certain amount of ink to a flexographic printing plate.
  • the anilox roll has a metal core coated by ceramic material, such as Cr 2 O 3 , the surface of which contains fine cells engraved by laser.
  • the amount of ink that is transferred to the plate depends on the angle of the cells, cell volume and line screen (specifying the number of cells per linear inch).
  • line screen specifying the number of cells per linear inch.
  • anilox rolls An exemplary process for making anilox rolls is presented in US patent application US 2010/0015354 , wherein the anilox roll is manufactured by blurring a roller surface, forming a ceramic layer on the roller surface, grinding the roller surface, polishing the roller surface, forming a pattern on the roller surface using laser, polishing the roller surface and cleaning the roller surface.
  • a high frequency arc ionizes a gas flowing between electrodes such that a plasma plume which is several centimeters in length develops.
  • the temperature within the plume can reach 16,000°C.
  • a material in powder form such as Cr 2 O 3 is injected. It is melted and propelled at high speed to the roll surface, where it rapidly cools and forms the coating of the roll.
  • the roll is coated by performing a plurality of spiral passes of the spray along the roll. Usually, a few dozen passes are performed over the roll.
  • the aim of the present invention is to provide further improvements to coating of anilox rolls.
  • the object of the invention is a method for plasma-coating of rolls by forming a ceramic layer on the roll surface with a plasma plume emitted by a plasma spray apparatus, the plasma plume containing a powdered coating material, wherein the coating material is applied to the roll in a plurality of spiral passes of the plume along the roll, wherein the plasma plume emitted by the plasma spray apparatus is limited by a ceramic disc (14) mounted in the path of the plasma plume and having an aperture (15) via which only the hot zone of the plasma plume is transmitted, and wherein the spiral passes of the plume along the roll are delayed by an angle dependent on the number of spiral passes to be applied to the roll, such as to be distributed evenly along the roll.
  • the delay angle between the passes is a prime number.
  • the delay angle is not less than 23 degrees.
  • the spiral passes of the plume are grouped in sets, wherein the passes of one set are delayed between each other by an angle different than the angle of delay for passes of another set.
  • Another object of the invention is a roll, in particular an anilox roll, plasma-coated by the method according to the invention.
  • the present invention takes into account the results of the research work presented by Liangde Xie et al. in an article "Processing parameter effects on solution precursor plasma spray process spray patterns" (Surface and Coatings Technology 183 (2004), pp. 51-61 ).
  • the article shows that the plasma plume has a large temperature variation, as shown in Fig. 1A .
  • the precursor droplets fed into the plasma regions at different temperature will experience different physical and chemical reactions.
  • the first coating material arriving at a given location in the substrate comes from the outer or colder region of the plasma jet, and is in the form of powdery deposits, as illustrated in Fig. 1B .
  • the powdery deposits are then covered over by the coating material from the hotter region of the plasma jet for locations near the axis of the plasma torch and by the material from colder part of the plasma jet at all other locations. Therefore, the adherent deposits in the sample are a mixture of the coating material from both the hot and cold regions, and the powdery deposits originate only from the precursor fed into the cold region of the plasma jet.
  • the hot zone is the zone in which the plasma plume has a temperature over 3400°C and the cold zone is the zone in which the plasma plume has a temperature below about 1200°C.
  • the present invention develops this concept by providing a plasma spray apparatus equipped with a ceramic aperture as shown in Fig. 2 .
  • the plasma spray apparatus comprises a rear gun body 11, to which a front gun body 12 is connected.
  • the front gun body comprises an insulator block, neutrode insulator housing, electrodes and neutrode stack and nozzle (inside front gun body, not shown for clarity).
  • a powder injector 13 is installed at the front of the front gun body 12.
  • the plasma spray apparatus according to the invention comprises a ceramic disc 14 with a central aperture 15 mounted on holders 16 attached to the front gun body 12. The central aperture blocks the outer cold zone (region) of the plasma plume exiting the gun.
  • the length of the holders 16 is adjustable so that the distance of the aperture 15 from the plasma gun can be adapted to a particular application.
  • the ceramic disc 14 is formed of a ceramic material, such as Carbon/Graphite, that can withstand high temperatures, i.e. temperatures up to 3000°C and has a non-sticking surface, i.e. a surface to which the powdered material from the cold zone of the plasma plume will not adhere.
  • the disc may have a diameter of about 100 mm and width of about 8 mm.
  • the aperture 15 can have a diameter of about 12-15 mm.
  • the aperture 15 may have conical edges with fillets at the entrance to make it aerodynamic and avoid introduction of turbulences in the plasma plume.
  • the cold zone of the plume is blocked from reaching the roll being coated, and therefore a much higher ratio of adherent deposit with respect to powdery deposits is achieved on the roll, which increases the coating density and uniformity.
  • the roll Due to a limited width of the plasma plume, the roll has to be coated a plurality of times, for example the plasma plume passes over the roll in a spiral manner a few dozen times. In case the width of the plume is reduced, the coating process has to be accurately controlled in order to avoid build-up of patterns along the roll, which make the coating non-uniform.
  • a certain angular delay has to be introduced, so that the coating in the opposite direction is not followed along the same path as the previous pass, which would result in a pattern such as shown in Fig. 3A .
  • the angular delay has to be chosen appropriately, such as to limit forming patterns.
  • Fig. 3B shows a roll coated with 15 double passes of the plasma gun, wherein an angular delay of 7 degrees has been introduced at the front of the roll and no angular delay has been introduced at the end of the roll - such delay will result in unacceptable, uneven coating.
  • Fig. 3C shows a roll coated with 15 double passes of the plasma gun, wherein an angular delay of 23 degrees has been introduced at the front and at the end of the roll - the lines are distributed evenly, which guarantees even coating.
  • Fig. 3A shows the roll after 1 pass
  • Fig. 3D shows the roll after 5 passes with the delay of 23 degrees
  • Fig. 3E shows the roll after 10 passes.
  • the delay has to be selected depending on the number of passes to be applied to the roll. For example, for the coating scheme as shown in Fig. 3D , the following angular delays have proved to be effective depending on the number of passes:
  • the delay is the largest prime number which is smaller than the division of 180 degrees by the number of double passes.
  • delays should not be less than 23 degrees, as the passes would be too close to each other. Therefore, in case more than 7 double passes are to be applied to the roll, they should be grouped in sets not larger than 7 double passes. Then, each set should be applied with a delay for the particular group. For example, if 16 double passes are required, they should be performed in three blocks: 3 double passes with a delay of 59 degrees, 6 double passes with a delay of 29 degrees and 7double passes with a delay of 23 degrees. By selecting the delay to be a prime number, it is guaranteed that the passes will not overlap.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Battery Electrode And Active Subsutance (AREA)
EP11170262A 2011-06-16 2011-06-16 Procédé de revêtement au plasma de rouleaux et rouleau revêtu au plasma Withdrawn EP2535437A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11170262A EP2535437A1 (fr) 2011-06-16 2011-06-16 Procédé de revêtement au plasma de rouleaux et rouleau revêtu au plasma

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11170262A EP2535437A1 (fr) 2011-06-16 2011-06-16 Procédé de revêtement au plasma de rouleaux et rouleau revêtu au plasma

Publications (1)

Publication Number Publication Date
EP2535437A1 true EP2535437A1 (fr) 2012-12-19

Family

ID=44545474

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11170262A Withdrawn EP2535437A1 (fr) 2011-06-16 2011-06-16 Procédé de revêtement au plasma de rouleaux et rouleau revêtu au plasma

Country Status (1)

Country Link
EP (1) EP2535437A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1410169A (en) * 1971-06-17 1975-10-15 Johnson Matthey Co Ltd Method of making composite layered structures by spraying
EP0197374A1 (fr) * 1985-04-03 1986-10-15 Winfried Heinzel Rouleau et gaine de rouleau d'impression et leur procédé de fabrication
US5225652A (en) 1991-02-21 1993-07-06 Plasma-Technik Ag Plasma spray apparatus for spraying powdery or gaseous material
US5406046A (en) 1992-11-06 1995-04-11 Plasma Tecknik Ag Plasma spray apparatus for spraying powdery material
DE19941564A1 (de) * 1999-02-19 2000-08-31 Volkswagen Ag Verfahren zum Bearbeiten einer Oberfläche eines Bauteils
US20020025386A1 (en) * 1999-02-19 2002-02-28 Rolf Heinemann Method and device for treating a surface of a component
DE102006061652A1 (de) * 2006-12-27 2008-07-03 Bayerische Motoren Werke Aktiengesellschaft Verfahren und Vorrichtung zum Beschichten eines Hohlkörpers
US20100015354A1 (en) 2008-07-16 2010-01-21 Lee Tai-Cheung Method of making rollers with a fine pattern

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1410169A (en) * 1971-06-17 1975-10-15 Johnson Matthey Co Ltd Method of making composite layered structures by spraying
EP0197374A1 (fr) * 1985-04-03 1986-10-15 Winfried Heinzel Rouleau et gaine de rouleau d'impression et leur procédé de fabrication
US5225652A (en) 1991-02-21 1993-07-06 Plasma-Technik Ag Plasma spray apparatus for spraying powdery or gaseous material
US5406046A (en) 1992-11-06 1995-04-11 Plasma Tecknik Ag Plasma spray apparatus for spraying powdery material
DE19941564A1 (de) * 1999-02-19 2000-08-31 Volkswagen Ag Verfahren zum Bearbeiten einer Oberfläche eines Bauteils
US20020025386A1 (en) * 1999-02-19 2002-02-28 Rolf Heinemann Method and device for treating a surface of a component
DE102006061652A1 (de) * 2006-12-27 2008-07-03 Bayerische Motoren Werke Aktiengesellschaft Verfahren und Vorrichtung zum Beschichten eines Hohlkörpers
US20100015354A1 (en) 2008-07-16 2010-01-21 Lee Tai-Cheung Method of making rollers with a fine pattern

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LIANGDE XIE ET AL.: "Processing parameter effects on solution precursor plasma spray process spray patterns", SURFACE AND COATINGS TECHNOLOGY, vol. 183, 2004, pages 51 - 61

Similar Documents

Publication Publication Date Title
US20230416921A1 (en) Method and apparatus for atmospheric pressure plasma jet coating deposition on a substrate
US5324552A (en) Process for coating substrate material
EP2654966B2 (fr) Procédé et appareil améliorés de projection thermique qui utilisent un arc fil transféré au plasma
US5215638A (en) Rotating magnetron cathode and method for the use thereof
EP0532134B1 (fr) Procédé et appareil pour revêter un substrat avec un polymère résistant à la chaleur
EP2845657B1 (fr) Procédé pour produire un mandrin de perçage
KR20150047457A (ko) 열적 및／또는 동력학적 코팅 시스템용 이동 가능한 마스크
RU2340703C1 (ru) Способ плазменной обработки поверхности изделия
US9227389B1 (en) Mixing apparatus and systems for dampening fluid vapor deposition systems useful for ink-based digital printing
CN112639155B (zh) 热喷涂皮膜的形成方法
EP2535437A1 (fr) Procédé de revêtement au plasma de rouleaux et rouleau revêtu au plasma
CN105506533B (zh) 一种印刷版辊的生产工艺
TW202026442A (zh) 一種濺射靶材的製備方法
US20230024945A1 (en) Improved shield for atmospheric pressure plasma jet coating deposition on a substrate
JPWO2019243631A5 (fr)
Takalapally et al. A critical review on surface coatings for engineering materials
JP2004190082A (ja) Ｐｖｄ・ｃｖｄ両用成膜装置及び当該装置を用いた成膜方法
KR20210086194A (ko) 플라즈마 분말 증착 장치 및 그를 이용한 증착 방법
Ando et al. Photo-catalytic TiO2 film deposition by atmospheric TPCVD
CN112867603B (zh) 等离子体电子束处理喷墨印刷装置
RU2795061C2 (ru) Улучшенные способ и устройство для осаждения покрытия с помощью плазменной струи при атмосферном давлении на подложку
JP2017199647A (ja) プラズマ発生方法及びそのための装置、並びドライ薄膜を有する構造体
JP7219584B2 (ja) プラズマ電子線処理インクジェット印刷装置
KR20230041899A (ko) 다중 노즐 플라즈마 분말 증착 장치 및 그를 이용한 증착 방법
US11610765B1 (en) Atmospheric-pressure plasma processing apparatus and method using argon plasma gas

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

17P Request for examination filed

Effective date: 20130605

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RIC1 Information provided on ipc code assigned before grant

Ipc: B41F 3/00 20060101ALI20131011BHEP

Ipc: C23C 4/00 20060101AFI20131011BHEP

Ipc: B41N 1/00 20060101ALI20131011BHEP

Ipc: C23C 4/12 20060101ALI20131011BHEP

Ipc: B41F 5/00 20060101ALI20131011BHEP

Ipc: B41N 7/00 20060101ALI20131011BHEP

Ipc: B41N 7/06 20060101ALI20131011BHEP

INTG Intention to grant announced

Effective date: 20131106

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20140318