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  • Writer's pictureBouke Bakker

Extruder screw geometries

We found this interesting research on the relation of extruder screw geometries, melt viscosity and thermal efficiency.


• Radial melt temperatures depend on screw type, screw speed and set temperature

• Single flighted extruder screws exhibited poorer temperature homogeneity

• Barrier flighted screw with spiral mixer achieve better temperature homogeneity

• Level of tempreature fluctuations increases with increasing HDPE's melt viscosity

• Specific energy consumption depends upon polymer melt visciosity

Extruder screw geometries used

Great work by the researchers!

We are thankful for their contribution to open source knowledge.

Acknowledgement: Vera-Sorroche, J., Kelly, A. L., Brown, E. C., Gough, T., Abeykoon, C., Coates, P. D., ... & Price, M. (2014). The effect of melt viscosity on thermal efficiency for single screw extrusion of HDPE. Chemical Engineering Research and Design, 92(11), 2404-2412.

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