CN110983235A - Anilox roll and preparation method thereof - Google Patents

Anilox roll and preparation method thereof Download PDF

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Publication number
CN110983235A
CN110983235A CN201911408479.1A CN201911408479A CN110983235A CN 110983235 A CN110983235 A CN 110983235A CN 201911408479 A CN201911408479 A CN 201911408479A CN 110983235 A CN110983235 A CN 110983235A
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China
Prior art keywords
layer
anilox roller
bottom layer
anilox
surface layer
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CN201911408479.1A
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Chinese (zh)
Inventor
张玉桧
朱晖朝
谢迎春
雷运生
王昊
黄仁忠
黄健
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Guangdong Institute of New Materials
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Guangdong Institute of New Materials
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Priority to CN201911408479.1A priority Critical patent/CN110983235A/en
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    • 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
    • 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
    • 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
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
    • C23C28/345—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with at least one oxide layer
    • 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
    • C23C4/06—Metallic material
    • 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
    • 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
    • C23C4/129—Flame spraying

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  • 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)
  • Inorganic Chemistry (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Printing Plates And Materials Therefor (AREA)

Abstract

The invention provides an anilox roller and a preparation method thereof, and belongs to the technical field of printing equipment. The anilox roller comprises an anilox roller base body, wherein a bottom layer and a surface layer are sequentially arranged on the surface of the anilox roller base body from inside to outside. The raw material for preparing the bottom layer comprises WC-10Co4Cr, and the raw material for preparing the surface layer comprises Cr2O3. By sequentially preparing the anti-corrosion wear-resistant double-layer structure on the surface of the anilox roller substrate, the capability of the anilox roller in resisting electric corrosion of printing ink in the using process can be effectively improved, and the use of key equipment is prolongedThe service life of the flexible printing machine is prolonged, the problems of discontinuous production and low efficiency are solved, the cost of optimizing key equipment for the flexible printing is reduced, and the competitiveness of enterprises is enhanced. The preparation method comprises the following steps: the bottom layer and the surface layer are sequentially prepared on the surface of the anilox roller substrate from inside to outside, the method is simple, and the anilox roller with better corrosion-resistant and wear-resistant effects can be prepared.

Description

Anilox roll and preparation method thereof
Technical Field
The invention relates to the technical field of printing equipment, in particular to an anilox roller and a preparation method thereof.
Background
Anilox rolls are the core component of flexographic printing presses and are responsible for uniformly delivering a certain amount of ink to the printing plate. At present, the service life of the corrugated roller in the market is short, the superiority can not be fully exerted, and even the corrugated roller can not be normally used.
In view of this, the present application is specifically made.
Disclosure of Invention
A first object of the present invention consists in providing an anilox roller having a better corrosion and wear resistance and a longer service life.
The second purpose of the invention comprises providing a preparation method of the anilox roller, which is simple and can prepare the anilox roller with better corrosion and wear resistant effects.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
the invention provides an anilox roller which comprises an anilox roller base body, wherein a double-layer coating is arranged on the surface of the anilox roller base body, and the double-layer coating sequentially comprises a bottom layer and a surface layer from inside to outside.
The raw material for preparing the bottom layer comprises WC-10Co4Cr, and the raw material for preparing the surface layer comprises Cr2O3。
In some embodiments, the mean particle size of WC-10Co4Cr is 5-40 μm.
In some embodiments, Cr2O3Has an average particle size of 10 to 50 μm.
In some embodiments, the underlayer has a thickness of 50-100 μm.
In some embodiments, the porosity of the bottom layer is 0.4-1%.
In some embodiments, the thickness of the surface layer is 100-200 μm.
In some embodiments, the surface layer has a porosity of 4 to 10%.
In some embodiments, the hardness of the surface layer is 1000-2000 HV.
In some embodiments, the bilayer coating has a hardness of 1678 and 1756 HV.
In some embodiments, the bond strength of the base layer to the anilox roll substrate is greater than 1 MPa.
In some embodiments, the bond strength of the base layer to the surface layer is greater than 1 MPa.
In addition, the invention also provides a preparation method of the anilox roller, which comprises the following steps: and sequentially preparing a bottom layer and a surface layer on the surface of the anilox roller substrate from inside to outside.
In some embodiments, the base layer is prepared by supersonic spraying, and the preparation parameters mainly comprise:
the nitrogen flow is 47-53L/min, the propylene pressure is 77-83Psi, the air pressure is 77-83Psi, the hydrogen pressure is 90-110Psi, the spraying distance is 90-110mm, and the powder feeding amount is 90-110 g.
In some embodiments, the surface layer is prepared by plasma spraying, and the preparation parameters mainly include:
the hydrogen flow is 8-12L/min, the argon flow is 35-45L/min, the current is 652-668A, the spraying distance is 97-103mm, the carrier gas flow is 3.5-4.5slpm, and the powder feeding amount is 40-60 g.
In some embodiments, before preparing the underlayer, roughening the surface of the substrate of the anilox roll is further included.
Preferably, the roughening treatment is performed by sand blasting.
Preferably, the roughening treatment further comprises cleaning the surface of the substrate of the anilox roll, followed by drying.
More preferably, the reagent used for washing comprises acetone.
In some embodiments, prior to preparing the underlayer, protecting the non-treated areas of the anilox roll substrate is also included.
Preferably, the non-treated areas of the anilox roll substrate are protected mainly by tape and tooling.
In some embodiments, the preparation of the anilox roll substrate comprises:
the outer barrel and the inner core are connected into a whole, and the material of the outer barrel comprises any one of stainless steel, carbon steel and aluminum.
Preferably, the outer tub is welded to the inner core.
The anilox roller and the preparation method thereof have the beneficial effects that:
a compact WC-10Co4Cr bottom layer is formed on the surface of the anilox roller substrate, so that the phenomenon that ink permeates into the surface of a roller blank to generate chemical corrosion in the ink loading process of the anilox roller is avoided; then forming Cr on the surface of the underlayer2O3And the surface layer avoids the adverse effect caused by the defects generated on the surface of the roller shaft of the anilox roller in the use process. The anti-corrosion wear-resistant double-layer structure is prepared on the surface of the anilox roller base body, so that the anti-ink electric corrosion capability of the anilox roller in the using process is improved, the service life of key equipment can be prolonged, the problems of discontinuous production and low efficiency are solved, the optimization cost of the key equipment for flexography is reduced, and the competitiveness of enterprises is enhanced. The method for preparing the anilox roller is simple, and the anilox roller with better corrosion-resistant and wear-resistant effects can be prepared.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a cross-sectional view of a coating of an ink-carrying corrugated roll provided in example 1 of the present application;
FIG. 2 is a salt spray corrosion surface topography of a two-layer structure of an ink-carrying corrugated roller provided in example 2 of the present application;
FIG. 3 shows the salt spray corrosion surface morphology of the ink-carrying corrugated roller in the single-layer structure provided in comparative example 1;
FIG. 4 is the SEM microtopography of FIG. 2;
FIG. 5 is an SEM micrograph of the localized area of FIG. 4 taken at 2000 magnification;
FIG. 6 is the SEM microtopography of FIG. 3;
fig. 7 is an SEM micrograph of the localized area of fig. 6 at 2000 x magnification.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The anilox roll and the method for manufacturing the same provided in the embodiments of the present application are specifically described below.
The inventors have found that when the pH of the ink, coating and cleaner with which the anilox roller is in contact is too high (pH < 4.5) or too low (pH > 11.8), the roller surface is liable to bulge, leading to severe cracking of the coating, and the ink or the like is liable to penetrate through the coating onto the substrate, thus corroding the substrate and seriously affecting the service life. And, can load certain pressure on the printing in-process ink scraping blade, too big pressure can accelerate the wearing and tearing speed of scraper and reticulation roller, gets into the printing ink system as tiny hard particle, also can lead to the roller surface to appear circumference mar when the cylinder rotates, and mesh wire wall collapses when serious, influences printing quality.
In view of this, the anilox roller of the present application is specifically proposed. The anilox roller comprises an anilox roller base body, wherein a double-layer coating is arranged on the surface of the anilox roller base body, and the double-layer coating sequentially comprises a bottom layer with corrosion resistance and a surface layer with wear resistance from inside to outside.
Wherein, the raw material for preparing the bottom layer can comprise WC-10Co4Cr, WThe C-10Co4Cr coating has good bonding strength and low porosity, and has good protection effect on a base layer; the raw material for preparing the surface layer may include, for example, Cr2O3，Cr2O3The corrosion resistance and the wear resistance are excellent. According to the method, the WC-10Co4Cr is used for preparing the bottom layer, so that the bottom layer has excellent chemical corrosion resistance, and the phenomenon that printing ink, coating and cleaning agent with different pH values penetrate into a substrate to corrode a roller blank can be effectively avoided, and Cr is used for preparing the roller blank2O3The surface layer is prepared, so that the surface layer has better wear resistance.
By reference, in the present application, the mean particle size of WC-10Co4Cr may be 5-40 μm, such as 5 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, or 40 μm, etc. The average particle size of WC-10Co4Cr is set to be in the range, if the particle size of the powder is less than 5 mu m, the powder is easy to gasify, pores are formed in the coating, and the compactness of the bottom layer is influenced; if the particle size of the powder is larger than 40 μm, the acceleration of the powder is small, the bonding strength of the coating is poor, and the coating is easy to peel. Cr (chromium) component2O3The average particle size of (B) may be 10 to 50 μm, such as 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm or 50 μm, etc. Mixing Cr2O3The average particle size of (2) is set to the above range, and if the powder particle size is less than 5 μm, the powder flowability is poor and the gun is easily clogged; if the powder particle size is larger than 40 mu m, the melting inside the particles is insufficient, and a large amount of non-melted particles exist in the coating, so that the wear resistance and the service life of the coating are influenced.
In this application, the thickness of the bottom layer may be 50-100 μm, such as 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm, or 100 μm, etc. The thickness of the surface layer may be 50-600 μm, preferably 100-200 μm, such as 1000 μm, 110 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm, 190 μm or 200 μm.
In some preferred embodiments, the ratio of the thickness of the base layer to the surface layer may be from 1/6 to 1/3. Within this thickness ratio range, the anilox roller can have both good corrosion resistance and wear resistance.
In this application, the porosity of the bottom layer is, by reference, 0.4-1%, such as 0.42%, 0.5%, 0.8% or 1%. The surface layer has a porosity of 4-10%, such as 4.1%, 4.3%, 5%, 8% or 10%. The porosity of the bottom layer is controlled within the range of 0.4-1% and is smaller than that of the surface layer, so that corrosive liquid can be effectively prevented from contacting the anilox roller by the compactness of the bottom layer, and a good protection effect is achieved on an anilox roller matrix. It is worth mentioning that the inventors have found that when the porosity of the bottom layer is greater than 1%, the corrosion resistance of the anilox roller is greatly reduced compared to a porosity of 0.4-1%.
In this application, the hardness of the surface layer may be 1000-.
It is worth noting that the thickness, porosity and hardness values of the bottom layer and the surface layer can be adjusted appropriately according to the ink loading requirement and the service life.
In reference, the bonding strength of the bottom layer and the anilox roller matrix is more than 1MPa, and the bonding strength of the bottom layer and the surface layer is more than 1MPa, so that the phenomena of peeling or falling off of the coating in the working process of the anilox roller are avoided.
In the application, a compact bottom layer is formed on the surface of the anilox roller substrate, so that the ink is prevented from permeating into the surface of a roller blank to generate chemical corrosion in the ink loading process of the anilox roller; and then, a surface layer is formed on the surface of the bottom layer, so that the adverse effect caused by the defect generated on the surface of the roller shaft in the use process of the anilox roller is avoided. The anti-corrosion wear-resistant double-layer structure is prepared on the surface of the anilox roller base body, so that the anti-ink electric corrosion capability of the anilox roller in the using process is improved, the service life of key equipment can be prolonged, the problems of discontinuous production and low efficiency are solved, the optimization cost of the key equipment for flexography is reduced, and the competitiveness of enterprises is enhanced.
In addition, the invention also provides a preparation method of the anilox roller, which comprises the following steps: and sequentially preparing a bottom layer and a surface layer on the surface of the anilox roller substrate from inside to outside.
In reference, the base layer is prepared by means of supersonic spraying, and the preparation parameters mainly include:
the nitrogen flow rate is 47-53L/min (such as 47L/min, 50L/min or 53L/min), the propylene pressure is 77-83Psi (such as 77Psi, 80Psi or 83 Psi), the air pressure is 77-83Psi (such as 77Psi, 80Psi or 83 Psi), the hydrogen pressure is 90-110Psi (such as 90Psi, 100Psi or 110 Psi), the spraying distance is 90-110mm (such as 90mm, 100mm or 110 mm), and the powder feeding amount is 90-110g (such as 90g, 100g or 110 g).
The quality of the supersonic spray coating is mainly influenced by gas flow, pressure, spray distance and powder feeding amount. The pressure of propylene, air and hydrogen must be sufficient, otherwise the acceleration of particles is insufficient, the impact deformation of particles is insufficient, the porosity of the coating is high, the bonding strength is low, and the coating is easy to peel off.
The surface layer is prepared by plasma spraying, and the preparation parameters mainly include:
the hydrogen flow is 8-12L/min (such as 8L/min, 10L/min or 12L/min, etc.), the argon flow is 35-45L/min (such as 35L/min, 40L/min or 45L/min, etc.), the current is 652-668A (such as 652A, 660A or 668A, etc.), the spraying distance is 97-103mm (such as 97mm, 100mm or 103mm, etc.), the carrier gas flow is 3.5-4.5slpm (such as 3.5slpm, 4slpm or 4.5slpm, etc.), and the powder feeding amount is 40-60g (such as 40g, 50g or 60g, etc.).
The flow of gas is one of the important process parameters, which directly affects the enthalpy and velocity of the plasma flame, which in turn affects the spray efficiency and coating porosity. If the flow velocity of hydrogen and argon gas is too large and the ion concentration is reduced, the excessive gas can cool the flame flow of the plasma, which is not beneficial to heating the powder, the powder is not fully melted, the spraying efficiency is reduced, the coating structure is loose, and the porosity is increased; the primary gas flow is too small, which weakens and weakens the flame flow, increases the relative content of secondary gases in the working gas, increases the heat of injection and the temperature, and excessively melts the sprayed powder.
In some embodiments, before preparing the underlayer, the surface of the substrate of the anilox roller is roughened, for example, by sandblasting.
Further, the roughening treatment also comprises cleaning the surface of the substrate of the anilox roller, and then drying, so that the surface of the anilox roller is clean and free of stains before spraying. Wherein the cleaning agent may comprise acetone.
Further, before preparing the bottom layer, the method also comprises the step of protecting the non-processing area of the anilox roller substrate, for example, the non-processing area of the anilox roller substrate can be protected by adhesive tape, tools and the like.
By reference, the preparation of the anilox roller matrix comprises: the outer barrel and the inner core are connected into a whole, and the material of the outer barrel comprises any one of stainless steel, carbon steel and aluminum. The thickness of the wall of the outer cylinder can be 5-10 mm. The outer barrel and the inner core can be connected into a whole in a welding mode.
During specific operation, the outer barrel can be connected with the inner core into a whole in a welding mode, so that the preparation of the anilox roller base body is completed, the anilox roller base body can be installed on a flexible printing machine, and the basic rotating function of the anilox bottom roller is ensured.
Further, fixing the reticulate pattern roller matrix on a rotary table to ensure that the matrix can rotate at a constant speed in the surface coating preparation process; meanwhile, the matrix is protected by the adhesive tape and the tool, so that the non-spraying area of the screen roller is protected. And roughening the surface of the anilox roller substrate by using sand blasting, cleaning by using acetone, and blow-drying by using air to ensure that the surface is clean and free of stains before spraying. The WC-10Co4Cr powder was spray-coated on the substrate surface of the anilox roller at high speed to form a dense underlayer. Plasma spraying Cr on the surface of the bottom layer of WC-10Co4Cr2O3Powder to form a uniform hardness surface layer.
Furthermore, the surface layer can be etched by adopting methods such as laser beams and the like to form a reticulate pattern, so that the aims of ink loading and flexible printing are preliminarily fulfilled. It should be noted that the texture arrangement can refer to the prior art, and is not described herein.
It is worth to say that the method has universality, can be applied to the manufacture of a new anti-corrosion wear-resistant layer on the surface of the anilox roller, is also suitable for the repair of old parts, and can also be applied to the manufacture of similar products.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
The embodiment provides a preparation method of an ink-carrying corrugated roller with a surface corrosion-resistant wear-resistant double-layer structure, which comprises the following steps:
(1) mixing Al2O3The thick-wall barrel (8mm) is connected with the carbon steel inner core into a whole in a welding mode, and the preparation of the anilox roller matrix is completed.
(2) And fixing the reticulate pattern roller base body on the rotary table, and protecting the blank by using an adhesive tape and a tool so as to protect a non-spraying area of the reticulate pattern bottom roller.
(3) The roller blank surface is roughened by sand blasting, then is cleaned by acetone and is dried by air blowing so as to ensure that the surface is clean and has no stain before spraying.
(4) And spraying WC-10Co4Cr powder on the surface of the anilox roller by using supersonic spraying to form a compact bottom layer. The supersonic spraying conditions are as follows: nitrogen flow rate: 50L/min, propylene pressure: 80Psi, air pressure 80Psi, hydrogen pressure 100Psi, spray distance: 100mm, powder feeding amount: 100 g.
(5) Spraying Cr on the surface of a reticulate pattern bottom roller by using plasma spraying2O3Powder, forming a surface layer. The plasma spraying conditions were: hydrogen flow rate: 10L/min, argon flow: 40L/min, current: 660A, spray distance: 100mm, carrier gas flow: 4slpm, powder feed amount: 50 g.
(6) The bottom layer deposition thickness is 100 μm, and the porosity is 0.4%; the surface layer deposition thickness is 300 μm, the porosity is 4%, and the hardness is about 1800 HV.
(7) The bonding strength of the reticulate pattern roller matrix and the bottom layer is more than 1 MPa; the bonding strength of the surface layer and the bottom layer is more than 1 MPa.
FIG. 1 shows Al in example 12O3And (3) a cross-sectional view of an anti-corrosion wear-resistant double-layer working layer (bottom layer + surface layer) prepared on the surface of the anilox roller. The figure shows that: the supersonic spraying wear-resistant WC-10Co4Cr coating has a compact surface, the powder is fully melted, and the spreading degree of molten particles after impacting a substrate is good; surface plasma prepared Cr2O3The coating is uniform.
Example 2
The embodiment provides a preparation method of an ink-carrying corrugated roller with a surface corrosion-resistant wear-resistant double-layer structure, which comprises the following steps:
(1) and (3) connecting a stainless steel thick-wall barrel (8mm) with the carbon steel inner core into a whole in a welding mode to finish the preparation of the anilox roller matrix.
(2) And fixing the reticulate pattern roller base body on the rotary table, and protecting the blank by using an adhesive tape and a tool so as to protect a non-spraying area of the reticulate pattern bottom roller.
(3) The roller blank surface is roughened by sand blasting, then is cleaned by acetone and is dried by air blowing so as to ensure that the surface is clean and has no stain before spraying.
(4) And spraying WC-10Co4Cr powder on the surface of the anilox roller by using supersonic spraying to form a compact bottom layer. The supersonic spraying conditions are as follows: nitrogen flow rate: 50L/min, propylene pressure: 80Psi, air pressure 80Psi, hydrogen pressure 100Psi, spray distance: 100mm, powder feeding amount: 100 g.
(5) Spraying Cr on the surface of a reticulate pattern bottom roller by using plasma spraying2O3Powder, forming a surface layer. The plasma spraying conditions were: hydrogen flow rate: 10L/min, argon flow: 40L/min, current: 660A, spray distance: 100mm, carrier gas flow: 4slpm, powder feed amount: 50 g.
(6) The bottom layer deposition thickness is 100 μm, and the porosity is 0.4%; the surface layer deposition thickness is 300 μm, the porosity is 4%, and the hardness is about 1800 HV.
(7) The bonding strength of the reticulate pattern roller matrix and the bottom layer is more than 1 MPa; the bonding strength of the surface layer and the bottom layer is more than 1 MPa.
The cross-section of the corrosion-resistant and wear-resistant double-layer structure (bottom layer + surface layer) prepared on the surface of the stainless steel corrugated roll in example 2 was scanned (not shown), and the results show that: the supersonic spraying wear-resistant WC-10Co4Cr coating has a compact surface, the powder is fully melted, and the spreading degree of molten particles after impacting a substrate is good; surface plasma prepared Cr2O3The coating is uniform.
Example 3
(1) Mixing Al2O3The thick-wall barrel (8mm) is connected with the carbon steel inner core into a whole in a welding mode, and the preparation of the anilox roller matrix is completed.
(2) And fixing the reticulate pattern roller base body on the rotary table, and protecting the blank by using an adhesive tape and a tool so as to protect a non-spraying area of the reticulate pattern bottom roller.
(3) The roller blank surface is roughened by sand blasting, then is cleaned by acetone and is dried by air blowing so as to ensure that the surface is clean and has no stain before spraying.
(4) And spraying WC-10Co4Cr powder on the surface of the anilox roller by using supersonic spraying to form a compact bottom layer. The supersonic spraying conditions are as follows: nitrogen flow rate: 47L/min, propylene pressure: 77Psi, air pressure 77Psi, hydrogen pressure 90Psi, spray distance: 90mm, powder feeding amount: 90 g.
(5) Spraying Cr on the surface of a reticulate pattern bottom roller by using plasma spraying2O3Powder, forming a surface layer. The plasma spraying conditions were: hydrogen flow rate: 8L/min, argon flow: 35L/min, Current: 652A, spray distance: 97mm, carrier gas flow: 3.5slpm, powder feed amount: 40 g.
(6) The bottom layer deposition thickness is 75 μm, and the porosity is 0.4%; the surface layer deposition thickness is 300 μm, the porosity is 4%, and the hardness is about 1800 HV.
(7) The bonding strength of the reticulate pattern roller matrix and the bottom layer is more than 1 MPa; the bonding strength of the surface layer and the bottom layer is more than 1 MPa.
Example 4
The embodiment provides a preparation method of an ink-carrying corrugated roller with a surface corrosion-resistant wear-resistant double-layer structure, which comprises the following steps:
(1) and (3) connecting a stainless steel thick-wall barrel (0.8mm) with the carbon steel inner core into a whole in a welding mode to finish the preparation of the anilox roller matrix.
(2) And fixing the reticulate pattern roller base body on the rotary table, and protecting the blank by using an adhesive tape and a tool so as to protect a non-spraying area of the reticulate pattern bottom roller.
(3) The roller blank surface is roughened by sand blasting, then is cleaned by acetone and is dried by air blowing so as to ensure that the surface is clean and has no stain before spraying.
(4) And spraying WC-10Co4Cr powder on the surface of the anilox roller by using supersonic spraying to form a compact bottom layer. The supersonic spraying conditions are as follows: nitrogen flow rate: 53L/min, propylene pressure: 83Psi, air pressure 83Psi, hydrogen pressure 110Psi, spray distance: 110mm, powder feeding amount: 110 g.
(5) Using plasma spraying on the reticulate bottomRoller surface Cr spraying2O3Powder, forming a surface layer. The plasma spraying conditions were: hydrogen flow rate: 12L/min, argon flow: 45L/min, current: 668A, spraying distance: 103mm, carrier gas flow: 4.5slpm, powder feed amount: 60 g.
(6) The bottom layer deposition thickness is 100 μm, and the porosity is 0.4%; the surface layer deposition thickness is 400 μm, the porosity is 4%, and the hardness is about 1800 HV.
(7) The bonding strength of the reticulate pattern roller matrix and the bottom layer is more than 1 MPa; the bonding strength of the surface layer and the bottom layer is more than 1 MPa.
Comparative example 1
The embodiment provides a preparation method of an ink-carrying corrugated roller with a wear-resistant single-layer working layer on the surface, which comprises the following steps:
(1) mixing Al2O3The thick-wall barrel (8m) is connected with the carbon steel inner core into a whole in a welding mode, and the preparation of the anilox roller matrix is completed.
(2) And fixing the reticulate pattern roller base body on the rotary table, and protecting the blank by using an adhesive tape and a tool so as to protect a non-spraying area of the reticulate pattern bottom roller.
(3) The roller blank surface is roughened by sand blasting, then is cleaned by acetone and is dried by air blowing so as to ensure that the surface is clean and has no stain before spraying.
(4) Spraying Cr on the surface of a reticulate pattern bottom roller by using plasma spraying2O3Powder, forming a surface layer. The plasma spraying conditions were: hydrogen flow rate: 10L/min, argon flow: 40L/min, current: 660A, spray distance: 100mm, carrier gas flow: 4slpm, powder feed amount: 50 g.
(5) The bottom layer deposition thickness is 100 μm, and the porosity is 0.4%; the surface layer deposition thickness is 300 μm, the porosity is 4%, and the hardness is about 1800 HV.
(6) The bonding strength of the reticulate pattern roller matrix and the surface layer is more than 1 MPa.
Comparative example 2
The embodiment provides a preparation method of an ink-carrying corrugated roller with a wear-resistant single-layer structure on the surface, which comprises the following steps:
(1) and (3) connecting a stainless steel thick-wall barrel (8mm) with the carbon steel inner core into a whole in a welding mode to finish the preparation of the anilox roller matrix.
(2) And fixing the reticulate pattern roller base body on the rotary table, and protecting the blank by using an adhesive tape and a tool so as to protect a non-spraying area of the reticulate pattern bottom roller.
(3) The roller blank surface is roughened by sand blasting, then is cleaned by acetone and is dried by air blowing so as to ensure that the surface is clean and has no stain before spraying.
(4) Spraying Cr on the surface of a reticulate pattern bottom roller by using plasma spraying2O3Powder, forming a surface layer. The plasma spraying conditions were: hydrogen flow rate: 10L/min, argon flow: 40L/min, current: 660A, spray distance: 100mm, carrier gas flow: 4slpm, powder feed amount: 50 g.
(5) The bottom layer deposition thickness is 100 μm, and the porosity is 0.4%; the surface layer deposition thickness is 300 μm, the porosity is 4%, and the hardness is about 1800 HV.
(6) The bonding strength of the reticulate pattern roller matrix and the surface layer is more than 1 MPa.
Verification example
1. Microhardness test
The working layers on the surface of the anilox roller prepared in the experimental examples and the comparative examples were subjected to microhardness test (see standard test method for microhardness of astm b578-2015 electroplated coatings) and salt spray corrosion test (see GB 6458-86 neutral salt spray test for metal coatings). Table 1 shows the results of the microhardness test, the loading force was 300g, and the loading time was 15 s.
TABLE 1 microhardness Performance testing of coating samples of different structures
Figure BDA0002349333220000151
Figure BDA0002349333220000161
Note: the hardness in table 1 is an average of 10 tests.
As can be seen from Table 1, the hardness values of the working layers corresponding to examples 1 to 4 are in the range of 1500-2000HV, and the hardness of the working layers on the surfaces of the anilox rolls of comparative examples 1 and 2 is less than 1500HV, i.e. the hardness value of the working layer with the double-layer structure is higher than that of the working layer with the single-layer structure, so that the coating with the double-layer structure is more wear-resistant and has longer service life.
2. Porosity test
The porosity of the bottom layer and the surface layer of the anilox roll prepared in experimental example 1 and example 2 was measured by a metallographic microscope, and the results are shown in table 2.
Table 2 porosity testing of different structural coating samples
Figure BDA0002349333220000162
As can be seen from Table 2, the WC-10Co4Cr substrate obtained by supersonic spraying has uniform deformation and low porosity of only about 0.4%, while the Cr obtained by plasma spraying2O3The porosity of the surface layer is as high as about 4%, so that the bottom layer sprayed by supersonic speed can play a good role in protection.
3. Salt spray corrosion test
The samples of examples 1-2 and comparative examples 1-2 were left to stand for 400 hours in a 5% NaCl salt spray environment, and the surface of the comparative coating was changed, and the result showed that the corrosion resistance of the coating of the stainless steel base roller + double layer structure was the strongest.
Photographs of corrosion of the coating corresponding to example 2 and comparative example 2 were taken, as shown in fig. 2 to 7. As can be seen from fig. 4 and 5, the anilox roll of example 2 having a two-layer structure has no corrosion pits and corrosion spots on the surface, and the coating surface is intact; it can be seen from fig. 6 and 7 that the surface coating of the single-layer structured corrugated roll has a large corrosion area. EDS results of the test energy spectrum show that: comparative example 2 had a large amount of Na in the cells of the mesh+/Cl-And (4) enrichment, wherein the macro surface layer has serious cracks and bulges and even falls off in a large area. The reason for this may be: plasma sprayed Cr2O3Although having an anti-corrosive effect, the porosity is as high as 5%, and a large amount of Na is contained+/Cl-Penetrating to the surface of the anilox roller matrix through the pores; while supersonic spraying of a compact WC-10Co4Cr bottom layer has only porosity0.4 percent, can further effectively prevent corrosive liquid from contacting the corrugated roller matrix and has the function of corrosion prevention.
The above test results show that: the sample prepared with the anti-corrosion wear-resistant double-layer working layer on the surface of the stainless steel roller blank has the most excellent anti-corrosion performance.
To sum up, the reticulation roller that this application provided has the anticorrosive wear resistance of preferred, and life is longer. The preparation method is simple, and the anilox roller with better corrosion-resistant and wear-resistant effects can be prepared.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The anilox roller is characterized by comprising an anilox roller base body, wherein a double-layer coating is arranged on the surface of the anilox roller base body, and the double-layer coating sequentially comprises a bottom layer and a surface layer from inside to outside; the preparation raw material of the bottom layer comprises WC-10Co4Cr, and the preparation raw material of the surface layer comprises Cr2O3；
Preferably, the WC-10Co4Cr has an average particle size of 5-40 μm;
preferably, the Cr is2O3Has an average particle size of 10 to 50 μm.
2. Anilox roll according to claim 1, characterized in that the thickness of the bottom layer is 50-100 μm,
preferably, the porosity of the bottom layer is 0.4-1%.
3. Anilox roll according to claim 1, wherein the thickness of the surface layer is 100-200 μ ι η;
preferably, the porosity of the surface layer is 4-10%;
preferably, the hardness of the surface layer is 1000-2000 HV;
preferably, the hardness of the double-layer coating is 1678-1756 HV.
4. Anilox roll according to claim 1, wherein the bonding strength of the bottom layer to the anilox roll substrate is more than 1 MPa;
preferably, the bonding strength of the bottom layer and the surface layer is greater than 1 MPa.
5. Method for producing an anilox roll according to any of claims 1-4, comprising the steps of:
and sequentially preparing the bottom layer and the surface layer on the surface of the anilox roller substrate from inside to outside.
6. The method according to claim 5, wherein the base layer is prepared by supersonic spraying, and the preparation parameters mainly comprise:
the nitrogen flow is 47-53L/min, the propylene pressure is 77-83Psi, the air pressure is 77-83Psi, the hydrogen pressure is 90-110Psi, the spraying distance is 90-110mm, and the powder feeding amount is 90-110 g.
7. The method according to claim 5, wherein the surface layer is prepared by plasma spraying, and the preparation parameters mainly comprise:
the hydrogen flow is 8-12L/min, the argon flow is 35-45L/min, the current is 652-668A, the spraying distance is 97-103mm, the carrier gas flow is 3.5-4.5slpm, and the powder feeding amount is 40-60 g.
8. The method according to claim 5, wherein before preparing the bottom layer, the method further comprises roughening the surface of the anilox roller substrate;
preferably, a sand blasting mode is adopted for coarsening treatment;
preferably, the roughening treatment further comprises cleaning the surface of the anilox roller substrate, and then drying;
more preferably, the reagent used for washing comprises acetone.
9. The method of claim 5, further comprising protecting a non-treated region of the anilox roll substrate prior to preparing the base layer;
preferably, the non-treatment area of the anilox roll substrate is protected mainly by tape and tooling.
10. The method of manufacturing of claim 5, wherein the preparing of the anilox roller substrate comprises:
connecting an outer barrel and the inner core into a whole, wherein the material of the outer barrel comprises any one of stainless steel, carbon steel and aluminum;
preferably, the outer tub is welded to the inner core.
CN201911408479.1A 2019-12-31 2019-12-31 Anilox roll and preparation method thereof Pending CN110983235A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050282034A1 (en) * 2004-01-29 2005-12-22 Kyocera Corporation Corrosion resistant member and method for manufacturing the same
CN105886997A (en) * 2015-01-26 2016-08-24 上海工程技术大学 Method for preparing printer anilox roller based on thermal spraying technology
CN106319421A (en) * 2015-06-23 2017-01-11 中南大学 Preparation method for abrasion and corrosion resistant coating layer for aircraft undercarriage
CN110158011A (en) * 2019-06-25 2019-08-23 广东省新材料研究所 Rewind roll and preparation method thereof with the compound roughening coating of surface anticorrosive wear-resistant
CN110331360A (en) * 2019-08-22 2019-10-15 广东省新材料研究所 Paper for daily use dandy roll and the preparation method and application thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050282034A1 (en) * 2004-01-29 2005-12-22 Kyocera Corporation Corrosion resistant member and method for manufacturing the same
CN105886997A (en) * 2015-01-26 2016-08-24 上海工程技术大学 Method for preparing printer anilox roller based on thermal spraying technology
CN106319421A (en) * 2015-06-23 2017-01-11 中南大学 Preparation method for abrasion and corrosion resistant coating layer for aircraft undercarriage
CN110158011A (en) * 2019-06-25 2019-08-23 广东省新材料研究所 Rewind roll and preparation method thereof with the compound roughening coating of surface anticorrosive wear-resistant
CN110331360A (en) * 2019-08-22 2019-10-15 广东省新材料研究所 Paper for daily use dandy roll and the preparation method and application thereof

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