Method of painting elongated workpiece

摘要

A painting gun having a ring-like gun main body with a circumferential opening formed in one peripheral portion thereof so as to allow for passage of an elongated workpiece as an object to be painted, and a plurality of nozzles radially disposed so as to eject a paint towards a central portion of the gun main body. The painting gun is moved in a longitudinal direction of the elongated workpiece after the elongated workpiece is placed in position inside the painting gun through the circumferential opening. Each of the nozzles atomizes the paint by atomizing air. An amount of the paint to be ejected from each of the nozzles is set to 35 cc/min or less, preferably 20 cc/min or less, per 1 kg/cm2 of an atomizing air pressure.