The flow pattern of a polyethylene melt in the working gap of a disc‐type extruder has been visualized. It is shown that there is complex circulating flow in the working gap of the extruder. The flow lines are spirals of Archimedes. An investigation into the qualitative picture of the flow of a polyethylene melt in rotational devices of the “plate‐plate” and “cone‐plate” type showed that in such devices a complex circulating flow is also realized and the flow lines are spirals of Archimedes.
The process of mixing in combined extruders is discussed in this paper. We propose a method for determining the quality of the composites. Strip thickness is a quality criterion. As a result of our research, programs have been established, which can determine the mixing quality of polymer compositions. The quality criterion in this method is the strip thickness. Objective was to create programs that allow specifying the desired compositions quality during their processing. Adequacy of the task solution has been verified by experimental studies in the test unit.
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