THROTTLING MEANS FOR HOT DIPPING OF WIRE ROD

PURPOSE:To form a uniform tin hot dipped player at all times irrespectively of the passing speed of a wire rod such as a twisted wire through the inside of a plating metal throttling means of a specific shape by passing said wire rod taken up from a tin hot dipping bath through said throttling means. CONSTITUTION:In the stage of passing a twisted conductor of copper or the like through the inside of a tin hot dipping bath, it is passed through a throttling means 10 in order to remove the excess molten tin stuck on the twisted wire and to form a uniform plating thickness. A through-hole 11 for passing of a plated twisted wire is provided along the central axial line 0 of the means 10 and the wire 1 stuck with excess molten tin 16 is taken up through the inside of the hole 11 to form a uniform tin plating layer. At this time, the diameter D of the hole 11 is set at D>=DO+2D/1,000 with respect to the outside diameter DO of the wire 1, the relation 20D>l>3D is provided between the same and the length l of the bearing part 13 of the means 10, and the approach angle 2alpha of an approach part 12 and an inlet diameter (d) are held in the relation 180 deg.>2alpha> 20 deg.8D>d>1.5D.