Extruder for poorly miscible extrudates

Details Extruder for poorly miscible extrudates Extruder for poorly miscible extrudates

B - Operations, Transporting

29

C

B29C 47/38 (2006.01) B29C 47/10 (2006.01) B29C 47/64 (2006.01) B29C 47/66 (2006.01) B29C 47/92 (2006.01)

Patent

CA 2057603

An extruder for poorly miscible extrudates is presented, in which the pin-lined barrel section and transfer mixing section, known per se and until now only used individually, are used together in an extruder. Restricting pins arranged in the transfer mixing section in the region of the greatest barrel channel volume permit universal use of the extruder with respect to the extrudate. The combination of the two mixing systems allows in a surprising way an increase in the material throughput of 60% to 100% with the mixing quality remain- ing the same and a halving of the drive torque. Due to a constant number of channels of the barrel channels and screw channels, the number of barrel flights and screw flights remains independent of the channel cross- sectional area of barrel and screw. A helical barrel groove in the feed zone of the extruder barrel addi- tionally improves the mixing quality of the extrudate and the output of the extruder.

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