CONTINUOUS EXTRUSION APPARATUS

摘要

Continuous extrusion apparatus particularly for the production of copper tube extrudate from continuous copper rod feedstock. A relatively small diameter coining roll (8) is continuously adjustably mounted to project into a circumferential groove (4) on a rotatable wheel (2) to apply a radial force of up to ten tonnes on the feedstock (32) to achieve uniform cohesion of the feedstock with the circumferential groove (4) prior to extrusion. The coining roll (8) is freely rotatably mounted on a stirrup (11) carried on a stirrup block (12) slidably mounted in a fixed support frame (14). Rotation through a restricted angle of an eccentrically mounted shaft (30) coacting with a housing (18) moves the coining roll (8) into or out of the circumferential groove (4). The shaft (30) is rotated by a motor (not shown) activated in accord with signals indicative of variance from a pre-determ fined requisite application of radial force to the feedstock (32) derived from the position of the coining roll (8), the temperature of the rotatable wheel (2) or/and the force applied at the coining roll (8).