METHOD OF CONTINUOUS FRICTION-ACTUATED EXTRUSION FOR COPPER PARTICLES

摘要

In a 'Conform' machine, a wheel (1) of relatively large dia. is matched with a rectangular groove that forms three sides of the extrusion passageway(3). The fourth side is formed by a shoe (4) and an abutment (5). A radial extrusion orifice (6) is formed in a die member (7). Abutment has a substantially smaller cross-section than the passageway, leaving a substantial gap between the abutment and the groove through which a significant proportion of the metal will extrude to form a lining in the groove and to re-enter the passageway at the entry end. Abutment is pref. semi-circular and pref. the clearance (Y) is in the range 1.5-2 mm.