Film coating nozzle and apparatus and method for coating compressor piston using the same

摘要

Disclosed are a film coating nozzle (140), and an apparatus and a method for coating a compressor piston (P1) using the same. The film coating (140) nozzle comprises a nozzle body (150) configured to supply coating material; and coating material spreading means (160) defined with a coating material injection hole which is communicated with the inside of the nozzle body (150), and formed integrally with the nozzle body (150) to spread to a uniform film thickness coating material applied to a surface of a product, in such a way as to remove excess coating material. The apparatus comprises rotation support means for rotatably supporting both ends of a piston for a fixed displacement swash plate type compressor; a pair of first coating material applying means installed above the rotation support means such that they can be moved upward and downward, the first coating material applying means having a pair of first nozzles which apply coating material to circumferential outer surfaces of both head parts of the piston and spread to a uniform film thickness applied coating material; fixing means installed in the vicinity of the rotation support means to fixedly support both ends of the piston; and second coating material applying means installed above the fixing means such that it can be moved upward and downward and slid laterally, the second coating material applying means having a second nozzle which applies coating material to a bridge part of the piston, and is slid to spread to a uniform film thickness applied coating material.