Effect of static mixer on fiber orientation of injection molded fiber?reinforced composites

The effect of an in-mold static mixer on orientation fiber-reinforced polypropylene (PP) was explored within the injection molding process. Several mold geometries and helical designs were assessed via simulation to identify mixing ability potential fiber orientation. It found that mixers runner segment could successfully mix polymer randomize fibers but alignment reduction quickly recovered. Injection experiments carried out verify these simulations using one geometry case. Fiber at different locations measured micro-CT (?CT) scans degree quantified by “goodness fit” a normal Gaussian function approach. experimental results showed good agreement with simulations. These indicated use system be used for melt after plasticizing unit machine. However, its changing overall molded parts offset flow downstream mixer, suggesting importance location respect part cavity.