METHOD FOR FORMING COATING FILM ON PC STANDARD STEEL WIRE

摘要

PROBLEM TO BE SOLVED: To provide a method for forming a coating film on a PC standard steel wire which forms a uniform synthetic resin coating film between single wires for comprising the PC standard steel wire and on the outer peripheral parts thereof, and eliminates the generation of the traces of air bubbles caused by entraining air for particle transportation on the surface of the coating film on the PC standard steel wire. SOLUTION: This method for forming the coating film on the PC standard steel wire forms the synthetic resin coating film with uniform thickness in which the traces of air bubbles do not exist between the single wires for comprising the PC standard steel wire and on the outer peripheral parts thereof by applying the first coating to a region in a state that the twist of the PC standard steel wire is temporarily opened and the second coating to a region in a state that the twist is returned to the original condition by using a coating gun having discharge ports for synthetic resin particles at a plurality of parts.