For modeling single-screw extrusion and hence predicting the process behavior the transport phenomena have to be investigated in detail. Especially the transport phenomena for single-screw extruders with barrel grooves in the melting section have not been investigated sufficiently until now. Additionally, the melting behavior of macroscopic heterogeneous polymeric material is in an early stage of its scientific development.
Experimental studies were planned to investigate the output, melting, and pressure built-up behavior for extruders with barrel grooves in the melting section using barrier screws. Additionally, experimental investigations were planned to study the melting behavior of heterogenous polymeric materials. Furthermore, physical and computational modeling were planned.
There were no fundamental changes in research orientation between the beginning and the end of the project. Additionally, to the original plan an investigation of different pineapple mixer designs was added, because barrier screws and grooved barrel single-screw extruders are typically used for high performance applications where mixing and homogenization is of high significance.