Dynamic analysis of melting in injection extruder

Melting is one of the most important process in plastics processing. Admit the extensive use of plastic injection moulding machine in industry, most s tudies were on extruders which were simpler to model. This paper studies th e melting process and derives its transient (dynamic) model for predicting the characteristics of melting in feeding stage of injection extruder. Base d on this transient model, factors affecting the melting speed in injection extruders are exposed. Simulation results agree with the results from expe riments.