Patent ID: 6691414
Filing Date: 2004-02-17
Classification: B05D,B21C,Y10T

Abstract:
A method of continuously coating and fabricating spiraled steel rebar product for concrete structures comprising the sequential steps of:(a) supplying a linear uncoated rebar to a polymeric powder-coating unit and applying a substantially uniform coating layer of a polymeric material onto the uncoated rebar to form a linear coated rebar by the sequential steps comprising: (a1) heating the uncoated rebar to an elevated temperature sufficient to fuse an epoxy powder, (a2) surface-abrading the rebar to achieve a desired anchor profile for the epoxy powder, (a3) electrostatically spray coating the heated and uncoated rebar with the epoxy powder and allowing the epoxy powder to fuse to thereby form a coated rebar having a substantially uniform coating of epoxy, and thereafter (a4) curing the epoxy coating to form a linear coated rebar; and then, (b) bending the linear coated rebar into a spiraled steel rebar product by bringing the linear coated rebar into contact with a series of bending wheels comprised of separated upstream and downstream bending wheels and a central bending wheel which is disposed between and below said upstream and downstream bending wheels, wherein the bending wheels include a rubber tire mounted on a rigid rotatable wheel member.