Extrusion dies

Details Extrusion dies Extrusion dies

B - Operations, Transporting

21

C

205/40

B21C 25/02 (2006.01)

Patent

CA 1270464

ABSTRACT EXTRUSION DIES An extrusion die has a die aperture which is negatively tapered essentially throughout its length at an angle of at least 1° such that any friction stress between the die lands and metal flowing through them is negligible, the length of the lands being not more than 2 mm so that fouling does not significantly take place thereon during extrusion. Faster extrusion speeds can be achieved, particularly when extruding aluminium alloy having a shear strength of from 1.2 to 4.0 Kg/mm2 at 500°C.

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