METHOD AND APPARATUS FOR COATING THREADED FASTENERS

摘要

An apparatus (10) for applying a liquid barrier coating (22) to a portion of discrete objects (14) such as fasteners is provided. A plurality of loose or connected parts (14) are introduced onto a magnetized conveyor (24). An optical sensor (74) detects the parts (14) and triggers guns (72) to apply a discrete shot of liquid coating material (22) such as fluorocarbon onto a predetermined portion of each part (14). Optionally, the parts (14) are provided to a second conveyor (36) in an inverted position for coating a second portion of each part (14). Blotters (78) may be provided to remove excess coating material (22), and dryers (84) and heaters (86) may be provided to fix the coating (22).