Study On Extrusion Mechanism And Experiment Of Layered Orientation Die

With the rapid development of the automobile industry, comprehensive performance of tire is required. Human society’s demand for polymer materials is increasing since polymer materials science has constantly developed in recent years. Therefore, many kinds of new polymer materials appear and rubber reinforced with short fiber is the ideal one for tire tread. Adding the short fibers to rubber compound with an appropriate orientation can significantly improve the performance of tire such as low rolling resistance, high tear and disintegrating spend block performance, high abrasion resistance, etc. However, the difficulty is how to make the short fiber has an appropriate orientation.This paper mainly developes a new extrusion die designed to achieve the layered extrusion and proper orientation of short fiber. The lamination method is a new type of layered extrusion technology which increases the composite layers through layering-twist-merger.First of all, this paper accesses to a large amount of literature, analyzes orientation mechanism of short fiber; trials out of the layered orientation extrusion die which can increase layers through layering-twist-merger and make the short fiber has proper orientation.Secondly, this paper analyzes configuration of the flow channel with POLYFLOW; simulates the pressure field, velocity field, shear rate field and viscosity field of full flow field; analyzes the influence of configuration and technics to orientation.Finally, systematic experiments are carried out on the extruder experimental platform, it can extrude rubber with better quality compared with ordinary extrusion die and get the best process parameters of layered orientation die.