二軸押出機の混練部におけるニーディングディスクの組み合わせとポリマー充満率の実験
Experimental Study on Effects of Kneading Disc Configuration to Material Filling Ratios at Mixing Zone of Twin Screw Extruder
石橋準也・鈴木克之・小林昭美・本田 章
Ishibashi, Junya / Suzuki, Katsuyuki / Kobayashi, Akiyoshi / Honda, Akira
The essential factors which determine the characteristics of intermeshing, co-rotating 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 distribution 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 configurations.
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.
Key words: Filling ratio / Screw configuration / Co-rotating / Twin screw extruder