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The essential factors which determine the characteristics of intermeshing, corotating twin screw extruder are kneading capability, material temperature and residence time controls. Presently, the theoretical analysis of these extruders are in the developmental stage and the present authors feel that the number of previous experimental reports on screw behavior is very limited. This paper presents the experimental results of resin filling ratios and associated material temperatures within the extruder's kneading zone by varying rotation speed and the combinations of kneading discs whose function is considered very critical. The results showed somewhat different material diatribution patterns within the kneading zone from what our intuitive understanding were, and which information, might be a helpful tool for the users of these machines in optimizing the present or future screw confugurations. Based on these data, a search for some kind of cornelation between the material distribution patterns and kneading disc combinations was tried. However, no conclusive relations were found partly due to not having sufficient data associated with operating pressures. Nevertheless, the basic information to conduct follow-up modelling experiments on the similar subjects were obtained.

Experimental Study on Effects of Kneading Disc Configuration to Material Filling Ratios at Mixing Zone of Twin Screw Extruder