| 摘要 |
PURPOSE: To improve abrasion resistance for a blanket cylinder by a method wherein a coat layer formed of a plurality of corrosion-resistant films, abrasion- resistant films and resin sealing layers is formed on the surface of the blanket cylinder. CONSTITUTION: In a blanket cylinder 12 used in an offset rotary press, a corrosion-resistant film 1 for the lower layer is formed first on the surface of the blanket cylinder 12. Two kinds of Hastelloy C powders, one in large particle size and the other in small particle size, are formed respectively in a layer 3 and a layer 4, and the layers 3 and 4 are layered alternately to form the corrosion-resistant film 1 in entire thickness of 100μm. Thereby, rusting does not occur even after 200 hours of salt water spraying. An abrasion-resistant film 2 on the upper layer is made, in order to make the cylindrical blanket free from slippage even in rotation for a long time and to make the layer available for satisfactory attachment, by forming an abrasion-resistant tungsten carbide flame-sprayed layer 5 in thickness of 40μm and by sealing (6) unevenness on the surface of the flame-sprayed layer 5 with phenol resin and furthermore by applying solvent for solvent treatment to make the surface adjusted. |
