Patent ID: 8281634
Filing Date: 2012-10-09
Classification: B21C,H01B,Y10T

Abstract:
1. Continuous extrusion apparatus, comprising: a) having a rotatable wheel formed with two identical circumferential grooves outwardly bounded by arcuate tooling discharging through radial exit apertures to an extrusion chamber positioned around a portal mandrel and means arranged continuously to supply a core through the mandrel whilst an aluminium based sheathing is extruded from the extrusion chamber around the core to form a cable being discharged to a roller corrugator arranged to form a helical corrugation on the sheath, wherein the roller corrugator is provided with rotational drive means and is mounted upon a freely axially moveable carriage with actuating means positioned on the carriage to apply a force on the sheath in a direction longitudinally of the cable to regulate tension in the sheath intermediate the extrusion chamber and the roller corrugator to a constant, low magnitude, value; and b) the speed of the rotational drive means of the roller corrugator is controlled in accordance with a signal indicative of the linear speed of the sheath combined with a signal from a transducer indicative of the position of the carriage.