A mathematical model of single-screw extrusion. Part X. Experimental verification of the model
Polimery 2000, No 3, 191
SummaryExperimental verification results are presented for a computer model of the single-screw extrusion process of polymers . An extruder, 45 mm in diameter (D), and two screw types were used, viz., a classical screw and a nonconventional screw comprising a mixing section. LDPE and PS were extruded. The model was verified as regards the predicted mass flow rate of the polymer, distribution of polymer pressures and temperatures, and consumption of energy (Table 1, Figs. 4–11). The data predicted by the model were most consistent with the observed flow rates and most divergent from the observed pressures. The classical screw was found to provide the higher extrusion yield than did the screw equipped with the mixing section. The lines to be followed in future studies include a more precise definition of model assumptions, dilation of model applicability to include other materials (e.g. polyblends), and developing of a model that optimizes the extrusion process.