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Manufacturing method for anilox roller with tungsten carbide coating layer

A technology of tungsten carbide and anilox roller, applied in coating, metal material coating process, melt spraying and other directions, can solve the problem that the outline of the mesh is not clear enough, the bonding strength of the coating is not high, the number of lines of the anilox roller is not high, etc. problems, to achieve the effect of excellent ink release, improve product quality and service life, and avoid environmental pollution problems

Inactive Publication Date: 2019-05-31
GUANGDONG INST OF NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems caused by traditional laser engraving ceramic anilox rolls with low number of lines, unclear mesh outline, low coating bonding strength and easy to fall off, large coating porosity, easy ink staining and difficult cleaning, and traditional plasma spraying technology. Severe decomposition of WC reduces coating performance and other problems. Provide a preparation method for tungsten carbide coated anilox rolls that can improve the number of lines, the definition of mesh outlines, and the corrosion resistance and wear resistance of anilox rolls.

Method used

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  • Manufacturing method for anilox roller with tungsten carbide coating layer
  • Manufacturing method for anilox roller with tungsten carbide coating layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Select an aluminum roller with a diameter of φ199.8mm, and then go through conventional degreasing and sandblasting, and spray the WC-10Co-4Cr coating with a supersonic oxygen combustion flame (HVOF) spray gun, kerosene 25L / min, oxygen 900L / min, spray The distance is 380mm, the linear speed of the workpiece is 65m / min, the powder feeding rate is 120g / min, the thickness of the sprayed coating is 0.15mm, and the metallographic diagram of the coating is as follows figure 1 shown;

[0028] (2) After grinding and polishing, the size reaches φ200mm, the coating thickness is 0.10mm, and the finish reaches Ra0.05;

[0029] (3) Meridian Hercules nano-pulse laser, multi-beam, pulse 60 and 120ns, 20mm focusing lens, multiple strikes and grayscale engraving technology, 1600 lines / inch, 45° twill, regular and uniform cell shape, inner wall smooth.

[0030] The machine has been used for 12 months, the roller surface is not worn, the ink loading is accurate, the ink release is g...

Embodiment 2

[0032] (1) Choose a φ499.6mm steel roller, after conventional degreasing and sandblasting, spray WC-Ni with supersonic air-assisted combustion flame (HVAF), air 0.55MPa, propane 0.48MPa, H2 flow rate 30L / min, workpiece line Speed ​​120m / min, powder feeding rate 110g / min;

[0033] (2) After grinding and polishing, the size reaches φ500mm, the coating thickness is 0.20mm, and the finish reaches Ra0.05;

[0034] (3) Meridian Hercules nano-pulse laser, multi-beam, pulse 60 and 120ns, 30mm focusing lens, multi-strike and monochrome engraving technology, 1500 lines / inch, 60° twill, regular and uniform cell shape, inner wall smooth.

[0035] The machine has been used for 10 months, the roller surface is not worn, the ink loading is accurate, the ink release is good, the ink is not easy to stain, and it is easy to clean.

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Abstract

The invention relates to a manufacturing method for an anilox roller with a tungsten carbide coating layer. With regard to the problems that a traditional laser engraving ceramic anilox roller is lowin line number and unclear in mesh contour, and a coating layer is low in binding strength, liable to fall off, high in porosity, liable to be dipped with ink, and not easy to clean, according to themanufacturing method for the anilox roller with the tungsten carbide coating layer, the tungsten carbide coating layer is sprayed onto an aluminum metal roller or a steel metal roller; the coating layer has a thickness of 0.05-1.0mm and a microhardness of 1100-1400HV0.3; the coating layer is compact (the porosity is less than 0.5%), high in binding strength (greater than 75MPa) and not liable to fall off, and Ra after grinding and polishing is less than 0.2[mu]m; a Meridian Hercules nanometer pulsed laser device and a multi-beam, multi-hitting and monochrome / grayscale engraving technology areadopted; the anilox line number can reach 1600 per inch; the shapes of anilox cavities are various, and comprise 30-degree hexagon, 60-degree hexagon, 45-degree inclined lines, wave-shaped lines and the like; and regular and uniform anilox cavity shapes, smooth inner walls, accurate ink loading amount, excellent ink unloading amount are achieved, the coating layer is compact, not liable to be dipped with ink, and easy to clean, and great significance is achieved with regard to printing for high-quality printed products.

Description

technical field [0001] The invention belongs to the technical field of anilox rolls, and in particular relates to a method for engraving an anilox roll on the surface of a supersonic flame sprayed tungsten carbide coating with a laser beam. Background technique [0002] Anilox rolls are mainly divided into metal anilox rolls and laser engraved ceramic anilox rolls. Metal anilox rollers are generally electroplated with chrome after electro-engraving or mechanical extrusion engraving on the surface of the metal roller; laser-engraved ceramic anilox rollers are sprayed with an alloy bottom layer on the surface of the metal roller, and then plasma sprayed with a ceramic layer. After grinding and polishing, Laser engraving the mesh holes, and then fine polishing. Laser engraved ceramic anilox rollers have high hardness and large ink transfer capacity, and can print full-page, brightly colored, and large ink-absorbing prints. Metal chrome-plated anilox rollers have a printing du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C23C4/129C23C4/18
Inventor 朱霞高张忠诚朱晖朝鲍雪球王枫
Owner GUANGDONG INST OF NEW MATERIALS