Method for coating the circumferential surface of a cylindrical work piece

摘要

A piston (32) or similar cylindrical work piece is wear coated with a liquid coating material (12) comprised of a solid component carried by a volatile solvent. The coating material is applied, from a closed reservoir (10), by a synchronously rotated distribution roller (24), to a larger diameter coating roller (28) that is continually heated to a temperature sufficient to remove a majority of the solvent. Simultaneously, the piston workpiece (32) is pre heated to a comparable temperature before being engaged with the coating roller (28) under a relatively high pressure. A series of thin, pre dried layers is applied to the workpiece surface sufficient to produce the a final wear layer of a desired final thickness.