Marshall Richards Barcro Limited

John Warner Pamplin

Brian R Astbury

Richard Shillito

Peter Fred Elson

James Vine Bennett

A multi-stage steel wire drawing machine has, in each stage, two dies and a single drive motor for drawing the wire through the two dies. In a preferred arrangement the dies are mounted side-by-side and an idler wheel used to define part of the wire path between the dies in the stage and a coaxial driven wheel is used to draw the wire through both dies in the stage and to define part of the wire path leading to the next stage. Dry wire lubrication before die entry and water cooling after passage through the dies are disclosed.

Wire drawing method and apparatus

A method and wire drawing apparatus are disclosed in which rapid cooling of the wire is effected by directly contacting the wire with liquid as it leaves the die and ensuring the wire passes through a bath of coolant while on the block. The bath can be formed against the wire-engaging surface of the block by a cowl.

Method and apparatus for drawing wire which uses a partial turn of wire wedged in an endless groove in a rotating wheel to generate the necessary drafting tension and wherein the drawn wire is cooled by direct contact with a liquid coolant as it leaves the die and while it is wedged in the groove. In a multi-stage apparatus, the coolant is removed from the wire downstream of the wheel and upstream of the next sizing opening by an air wipe.

This invention relates to a method of determining the sequence of die sizes to be used in a multi-die/block drawing machine to draw metal from any given input stock size to any given final wire size to give optimum efficiency and proposes nomograms for achieving the sequence quickly and easily.

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Bishop Auckland, United Kingdom

John Warner Pamplin