Continuous extrusion apparatus

B - Operations – Transporting – 21 – C

Patent

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Details

B21C 23/00 (2006.01)

Patent

CA 2397807

Continuous extrusion apparatus for the production of copper tubing having a rotatable wheel formed with a plurality of circumferential grooves registering 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 two 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 in excess of 500 kilograms extruded at a temperature of approximately 750 degrees Celsius.

L'invention concerne un dispositif d'extrusion continue permettant de produire des tubes en cuivre. Ce dispositif comprend une roue rotative comprenant une pluralité de canaux périphériques alignés avec des éléments (4) de butée formés dans une partie supérieure de la filière. Les orifices (6) de sortie correspondants présentent une surface de section représentant de deux à cinq fois la section radiale de canal associé et conduisent à un passage (8) qui diverge progressivement débouche dans une chambre (10) de filière d'extrusion contenant une filière annulaire (non illustrée). Ce dispositif permet d'obtenir un produit extrudé se présentant sous forme d'un tube de cuivre continu, exempt de raccords, d'une masse supérieure à 500 kilogrammes, extrudé à une température d'environ 750 degrés Celsius.

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