Bead wire manufacturing method and manufacturing apparatus

Abstract

A bead wire manufacturing method/apparatus includes a descaling step/device for removing oxide on the surface of a wire rod, a coating liquid adhesion step/device for adhering a coating liquid to the wire rod, wiredrawing steps/devices for performing area reduction workings on the wire rod, and a bluing step/device for bluing the wire rod having been raised to a high temperature through the area reduction workings, in a temperature range of 350° C. to 480° C. Thus, the wire rod having been raised to a high temperature through wiredrawing is blued without being cooled down to effectively utilize the temperature retained therein, so that the method/apparatus is little in energy loss.

1 - 9 . (canceled) 
     
     
         10 . A bead wire manufacturing method comprising:
 a descaling step of removing oxide on the surface of a wire rod;   a coating liquid adhesion step of adhering a coating liquid to the wire rod from which the oxide has been removed;   wiredrawing steps of performing area reduction workings on the wire rod with the coating liquid adhered thereto; and   a bluing step of bluing the wire rod having been raised to a high temperature through the area reduction working, in a temperature range of 350° C. to 480° C.   
     
     
         11 . The bead wire manufacturing method in  claim 10 , wherein:
 the wiredrawing steps comprise area reduction steps of performing the area reduction workings by wiredrawing the wire rod and cooling steps of cooling the wire rod having been subjected to the area reduction workings, and   the cooling step is omitted from the wiredrawing step right before the bluing step.   
     
     
         12 . The bead wire manufacturing method in  claim 10 , further comprising a plating step of plating the wire rod having been blued at the bluing step. 
     
     
         13 . The bead wire manufacturing method in  claim 10 , wherein the wire rod is made of a high carbon steel containing carbon in a range of 0.59% or more to 1.1% or less in weight percent and having two-phase structures of ferrite and cementite. 
     
     
         14 . A bead wire manufacturing apparatus comprising:
 a wiredrawing line for wiredrawing a wire rod made of a high carbon steel to a predetermined wire diameter suitable for bead wire; and   a plating line for plating the wire rod having been wiredrawn to the predetermined diameter;   wherein the wiredrawing line comprises:   a descaling device for removing oxide on the surface of the wire rod;   a coating liquid adhesion device for adhering a coating liquid to the wire rod;   wiredrawing devices for performing area reduction workings on the wire rod; and   a bluing device for bluing the wire rod having been raised to a high temperature through the area reduction working, in a temperature range of 350° C. to 480° C.   
     
     
         15 . The bead wire manufacturing apparatus in  claim 14 , wherein the wiredrawing line is constructed to process the wire rods one by one, while the plating line is constructed to process the wire rods having been wiredrawn by the wiredrawing line, simultaneously by a unit of plural tens. 
     
     
         16 . The bead wire manufacturing apparatus in  claim 14 , wherein the bluing device includes a heating device for heating to the temperature range the wire rod having been raised to the high temperature through the area reduction working. 
     
     
         17 . The bead wire manufacturing apparatus in  claim 16 , wherein the heating device includes a rotatable heating drum for winding therearound the wire rod having been raised to the high temperature through the area reduction working and a heating coil built in the heating drum for heating the wire rod having been wound around the heating drum. 
     
     
         18 . The bead wire manufacturing apparatus in  claim 16 , wherein the heating device includes a heating furnace for performing an electric current heating or an induction heating on the wire rod having been heated through the wiredrawing.