Internal flow optimization in a complex profile extrusion die using flow restrictors and flow separators

The control of flow balance at the die exit is key for successful extrusion polymers. complex cross-sectional variation in real-world hollow profiles intrinsically promotes imbalance cavity. Special considerations are required designing dies such profiles. design a door frame profile was computationally optimized this study with aid commercially available software package. velocity distribution exit, post-die extrudate deformation, temperature distribution, and pressure traditional investigated detail found to be inadequate. A modified incorporated three distinct features, restrictors, separators, approach angle torpedoes, achieve balanced uniform exit. restrictors separators were added pre-parallel zone. Flow on top bottom torpedoes increase restriction polymer flow. unique inclined restrictor introduced internal melt junctions outer wall inner vertical walls separate into different sections minimize cross between these sections. addition features proved highly effective balancing combination 3-D modeling simulation cost-effective time efficient optimizing designs before manufacturing.