Review of Processing Techniques in Large-Format Additive Manufacturing of Polymers and Composites

This chapter reviews the advancements and applications of large-format additive manufacturing (LFAM) processes for polymers and composites. Key innovations are highlighted that have elevated the adoption in the industry, such as the transition from filament to pellet feedstock, enhanced extrusion systems, and increased speed and size increase. This chapter also presents a review of the most representative equipment and leading companies in the market worldwide, exploring all different configurations. The scalability and versatility of LFAM have enabled adoption in industries like aerospace and automotive, producing high-performance, large-scale components, with different applications from prototype to final parts production or molds. Challenges such as scaling costs, control precision, and material compatibility are addressed alongside emerging solutions, positioning LFAM as a transformative tool in manufacturing.