| The flow behavior of rubber carbon black compounds were studied both experimentally and theoretically in single screw rubber extruders of varying design including screws with slices and pin barrel extruders.; Experiments were carried out on both a specially designed pin barrel section for a 44 mm cold feed Monsanto laboratory rubber extruder and a 90 mm Paul Troester pin barrel screw extruder, QSM16D-90.; Pumping characteristics, screw pulling experiments, and flow marking were carried out for the various screw types. Three compounds were used (i) passenger-tire-tread (PTT), (ii) truck-tire-tread compound (TTT) and (iii) an NBR based industrial compound (Hose Compound).; Pumping capability, pressure development and temperature profiles were studied for a Troester, QSM16D-90.; A new flow model based on the hydrodynamic lubrication theory and a modified Flow Analysis Network method was developed for non-Newtonian and non-isothermal fluids in three different kinds of rubber screw geometries. The effect of screw geometry on screw pumping and pressure development characteristics were investigated. |
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