| 摘要 |
PURPOSE:To produce a high-performance roller having uniform quality, high hardness and wear resistance by coating successively a conductive treating material layer, copper layer and hard chrome layer on the surface of a cylindrical material consisting of a composite material contg. carbon fiber tows. CONSTITUTION:The resin-impregnated carbon fiber tows are wound about perpendicularly on a cylindrical shaft to form the innermost layer 1. Said tows are alternately wound at 5-45 deg. with the shaft to form an intermediate layer 2 and are wound about perpendicularly to the shaft to form the outermost layer 3, successively by which the cylindrical material is obtd. The material rigidity of the resulted cylindrical material in the axial direction of the cylinder is >=6.5t/mm<2> and the coefft. of thermal expansion at -30-130 deg.C does not exceed 2X10<-5>/ deg.C in the axial direction of the cylinder and 6X10<-5>/ deg.C in the perpendicular direction thereof. The conductive film 4 is formed on the surface A of such cylindrical material and the nickel or copper layer 5 is coated and formed as underlying plating thereon. The chrome plating layer 6 which is hard and highly resistant to wear is thereafter coated and formed as the final layer thereon. Such cylindrical material is finished by polishing, by which the lightweight and highly rigid roller is obtd.
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