Friction heated extruder to form wire from powder has center rotor with external circumferential groove held by plate in stator and with channel between rotor and stator ending in die and with fluid cooling to groove

摘要

The extruder has a central rotor that is retained in a stator formed of two annular segments by a circumferential plate and groove. A passageway between part of the rotor and stator extends from powder inlet (42) to a stop (26) and die (46). Annular grooves through inner segment are formed beside the circumferential groove. Circumferential groove, annular grooves in sidewalls and die jacket (52) are cooled by fluid e.g. nitrogen or water flow Independent claims are also included for