Material and process development for the production of large-sized polypropylene components in the novel high-speed 3D printing process SEAM - SEAM-PP

Project summary

PP/PE plastics are very interesting for a wide range of applications. This project focuses on large-sized parts (volume 0.03 to 1,5 m³) available on the market in medium-sized quantities (< 5'000 pcs/year). Existing production processes are expensive; therefore, 3D printing of such parts is of great interest. However, established 3D printing processes are unprofitable for such parts, because of limited building space. Very long process times and high material prices lead to high costs. SEAM (Screw Extrusion Additive Manufacturing) of Fraunhofer IWU has enough space, high printing speed and uses standard plastic granules. This could solve the current problems, but the technology is only tested with the much easier to process material PA CF. Further development of processing technology, PP/PE material modifications, design rules for the parts and process simulation are worked out in a consortium of German and Swiss partners.