Posi-Melt “XLA” Mixing Screw
In order to Add a higher degree of homogenization to the melt pool we developed a very effective distributive/dispersive mixer that works by forcing the polymer to change direction numerous times over a short axial distance and by Adding extensional strain to the Polymer by forcing the material to cross over a shallower land multiple times for added shear. A positive pumping angle and major flight OD wiping action assures a low pressure drop for high throughput yet pressurizes the channels for positive displacement for melt cleaning purposes. The design is very versatile, rows can be added, the number of slots determined and the clearance between the barrel ID and the Mixing Land can be changed to suit the polymer family. The mixer is used for virtually all resin groups when precise color matching is needed or the residence time and swept volume dictate.