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About this Abstract
Meeting 2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
Symposium 2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
Presentation Title Effect of a High-Flow Nozzle Design on the Printability of Polymer Feedstock in Material Extrusion Additive Manufacturing
Author(s) Lucky Ekene Bernard, Chukwuzubelu O Ufodike, Gaius C Nzebuka, Kareem Chaar
On-Site Speaker (Planned) Lucky Ekene Bernard
Abstract Scope The modification of the nozzle flow geometry of an extrusion-based printer to enable high-flow extrusion is presented. The novel nozzle design has a conical exit section, a channel width of 6 mm, and a cross-sectional area 12.5 times that of a standard 0.6 mm nozzle. The dimensional accuracy was evaluated for different nozzle heights, temperatures, and flow percentages. The thickness swell ratio showed a positive correlation with nozzle height and flow rate, and the width swell ratio showed a positive correlation with flow rate but a negative correlation with nozzle height. The swell ratios increased with temperature across all heights and flow percentages. The thickness swell ratio and average build volume decreased with the volume flow rate due to slippage, motor inaccuracies, and flow losses at higher speeds. In conclusion, the nozzle design could increase the flow rate at the same speed, reduce extrusion time, and increase the build rate.
Proceedings Inclusion? Undecided

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