Doctor blade
AssigneeDaetwyler Swisstec AG
InventorsHans Jörg Brudermann, Sibylle Stiltz, Andreas Hügli
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Abstract
A doctor blade for scraping printing ink from a surface of a printing plate, comprising a flat and elongated main body having a working edge area formed in a longitudinal direction, the working edge area being coated with at least one first coating on the basis of a nickel-phosphorus alloy, and is characterized in that the first coating contains at least one additional component for improving the wear behavior of the doctor blade.
Claims35
A doctor blade for scraping printing ink from a surface of a printing plate, which comprises a flat and elongated base element having a working edge region formed in a longitudinal direction, where at least the working edge region is coated with at least a first coating based on a nickel-phosphorus alloy, wherein said at least a first coating contains at least one additive component for improving the wear of the doctor blade, said at least one additive component comprising hard material particles, wherein the hard material particles comprise both SiC and diamond, with a particle size of the SiC being greater than a particle size of the diamond;
- wherein said at least a first coating comprises said hard material particles dispersed therein.
A process for producing a doctor blade, for scraping printing ink from a surface of a printing plate, wherein the doctor blade comprises a flat and elongated base element having a working edge region formed in a longitudinal direction, where at least the working edge region is coated with at least a first coating based on a nickel-phosphorus alloy, wherein said at least a first coating contains at least one additive component for improving the wear of the doctor blade, said at least one additive component comprising hard material particles, wherein the hard material particles comprise both SiC and diamond, with a particle size of the SiC being greater than a particle size of the diamond;
- said process comprising the steps of:
- mixing said at least one additive component into said at least a first coating;
- substantially simultaneously depositing said at least a first coating based on a nickel-phosphorus alloy and said at least one additive component on a working edge region of the doctor blade formed in a longitudinal direction of a flat and elongated base element;
- said at least one additive component comprising hard material particles, wherein said hard material particles comprise both SiC and diamond, with the particle size of the SiC being greater than the particle size of the diamond.
Dependencies are inferred from the claim text.