B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 47/62 (2006.01)
Patent
CA 2445951
An extruder screw includes an energy transfer section divided into successive barrier sections in which a channel formed by a first thread is divided into at least two sub-channels by a second thread. A ratio of the difference in outer diameters of the threads is approximately inversely proportional to the ratio of the lengths of adjacent ones of the barrier sections.
L'invention concerne une vis d'extrudeuse (30) comprenant une partie de transfert énergétique divisée en parties de barrière successives dans lesquelles un canal (32) formé par un premier filetage (31) est divisé en au moins deux canaux auxiliaires (35, 36) au moyen d'un second filetage (33). Le rapport de la différence entre les diamètres extérieurs des filetages est approximativement inversement proportionnel au rapport des longueurs des parties de barrière adjacentes.
Barr Robert A.
Ridout & Maybee Llp
LandOfFree
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