CONTINUOUS EXTRUSION APPARATUS

摘要

Continuous extrusion apparatus for the production of copper tubing having a rotatable wheel formed with a plurality of circumferential grooves registeri ng with (as shown in the figure) abutments (4) formed on a die top (2). Respective exit apertures (6) each have a cross-sectional area of between tw o and five times the radial cross-section of the associated groove and lead to a passage (8) smoothly diverging to connect into an extrusion die chamber (10) housing an annular extrusion die (not shown). The apparatus produces an extrudate in the form of a continuous, seamless, copper tube having a mass i n excess of 500 kilograms extruded at a temperature of approximately 750 degre es Celsius.