Polymer flow velocity in the helical channel in dependence of a coordinatesystem

Taking into consideration the Extensive literature we conducted our own stu dies of polymer flow velocity in the helical channel of the plasticating sy stem. They included the following subjects: studies conditions in rectangul ar and helical coordinate systems-a model with a rotating barrel and a mode l with a rotating screw (theoretical principles); computational verificatio n on the concrete example for different screw channel depths, comparison of the models with regard to drag flow velocity, pressure flow velocity, long itudinal flow velocity (resultant), shear rate and polymer viscosity. The thesis that both models of a screw-based plasticating system with a rot ating barrel or a rotating screw differ fundamentally was confirmed in the same conditions in two coordinate systems-rectangular and helical. In conne ction with this theoretical investigations at a rotating barrel and next th eir experimental verification at a rotating screw: which is a common practi ce, are unsuitable.