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DIGITAL LIBRARY: CAMX 2023 | ATLANTA, GA | OCTOBER 30-NOVEMBER 2

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Multi-Axis Pellet-Based Extrusion for Large Format Additive Manufacturing

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Title: Multi-Axis Pellet-Based Extrusion for Large Format Additive Manufacturing

Authors: Aywan Das, Wout De Backer

DOI: 10.33599/nasampe/c.23.0090

Abstract: Large Format Additive Manufacturing (LFAM), or Big Area Additive Manufacturing (BAAM), was introduced to resolve the limitations of the low deposition rate, low scalability, and therefore long print times, of traditional 3D printing methods when applied to the manufacturing of large structures and tooling. LFAM can be used to overcome the high conventional tooling costs of large structures. An overview of LFAM technology is provided in this paper, and shortcomings of current technology are identified, i.e., that large format prints are not making use of multi-axis printing benefits, such as improved layer adhesion and reduced needs of support material. A prototype of a pellet-fed multi-axis large-format material extrusion 3D printer was designed and built. To evaluate the comprehensiveness of the LFAM system utilized in this study, experiments were carried out to find out the best results. Later, the LFAM technology developed in this research was experimentally verified to obtain process parameters for both the consumer and engineering thermoplastic polymers, such as PLA as a printing material. To demonstrate the LFAM's advancements, a 2x2 ft part was printed at a faster rate than conventional printers, with the long-term goal of printing a 10 ft part by the end of the year. The lessons learned from printing large scale multi-axis parts with these two different materials are reviewed and summarized, and recommendations for the use of multi-axis LFAM are made.

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Conference: CAMX 2023

Publication Date: 2023/10/30

SKU: TP23-0000000090

Pages: 18

Price: $36.00

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