Patent ID: 7980110

Claim:
Continuous extrusion apparatus, comprising: a) a rotatable wheel provided and formed with two identical circumferential grooves; b) arcuate tooling provided and bounding radially outer portions of the respective grooves; c) a die body provided and including exit apertures extending in a generally radial direction from the respective grooves to an extrusion chamber positioned around a portal mandrel and discharging axially of the mandrel through a die orifice of uninterrupted annular cross-section intermediate the mandrel and a die body wall; d) a supply device provided and arranged to supply a core through the mandrel, in use; e) a heating device provided and arranged to supply heat to a portion of the die body radially outward of the wheel from the extrusion chamber, in use; f) the heating device including electric induction heating coils; g) the coils being positioned on the die body; h) a pair of abutments obturating the respective circumferential grooves are mounted to be moveable in a direction tangential to the rotatable wheel into and out from the circumferential grooves in sliding contact with an associated face of the die body adjoining the rotatable wheel with the die body in contact with the adjoining rotatable wheel; and i) a ram being provided for moving the abutments into and out from the circumferential grooves for obturating the respective circumferential grooves.