単軸スクリュ押出機における熱可塑性プラスチックの溶融の促進
Melting Acceleration of Thermoplastic Materials in the Single Screw Extruder
中村和之・酒井忠基
Nakamura, Kazuyuki / Sakai, Tadamoto
In this report, the melting behavior of thermoplastic materials has been investigated, which is important in the analysis of the plasticating performance of single screw extruder with forced feeding section. Screw removal experiments were carried out to observe the melting process of polypropylene and polyethylene. Based on these experimental results., an improved melting mechanism was utilized to accelerate the melting rate in the screw channel. The rapid melting of the solid bed is accomplished by conduction heat, viscous dissipation in the melt film and solid circulations caused by drag force and high pressure gradients. This improved melting mechanism was observed experimentally in the newly developed screw channel, which was different from Tadmor's melting model.
Key words: Extrusion / Single screw / Forced feeding / Plasticating behavior / Thermo plastics / Melting