2013•Unpublished venueRequires access

Simulating Cross-Planar Flow and Mixing in Differential Twin Screw Extruder

Bing Guo

Abstract

Advantages of differential twin screw extruder were presented,in which cross-planar flow and mixing effect was further analyzed by Polyflow simulation.Comparison was conducted for the cases for differential ratios of 5∶1 and 4∶1 as well as 1∶1 running in different directions.It was illustrated that differential extruder exhibited better in cross-section mixing index,which became stronger with higher differential ratio.However,shear rate and tensile rate for extrusion at differential ratio 4∶1 were higher than for 5∶1.Thus,differential ratio should be chosen in considering mixing and plastication in design extruder.

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Key concepts: Plastics extrusion, Mixing (physics), Materials science, Extrusion, Differential (mechanical device), Flow (mathematics), Mechanics, Composite material