Schuffenhauer T, Stichel T, Kopp SP, Roth S, Schmidt M (2019)
Publication Type: Conference contribution, Conference Contribution
Publication year: 2019
Event location: Munich
Overcoming the inherent restriction of selective laser melting (SLM) of polymers to the processing of a single material remains a major challenge. Multi-material SLM requires more flexible deposition options to prepare arbitrary powder patterns. Besides the adaption of the recoating system, a suitable melting strategy must be developed. In this report, a previously described vibrational nozzle setup is used for the preparation of a multi-material powder layer. The irradiation strategy is modified to meet the requirements of processing multiple powders: Infrared emitters globally heat the building chamber and induce melting of the low-melting polymer shortly after its deposition. Subsequently, a scanned CO 2 laser beam irradiates the part area, thus melting the high-melting polymer and coalescing both materials. Flowability properties of different polymer powders are optimized for the nozzle-based deposition and analyzed accordingly. Using the adapted SLM process route, multi-layered compounds are generated and characterized regarding surface roughness and microstructure in the boundary zone.
Schuffenhauer, T., Stichel, T., Kopp, S.-P., Roth, S., & Schmidt, M. (2019). Process route adaption to generate multi-layered compounds using vibration-controlled powder nozzles in selective laser melting of polymers. In Proceedings of the Lasers in Manufacturing Conference 2019. Munich.
Schuffenhauer, Thomas, et al. "Process route adaption to generate multi-layered compounds using vibration-controlled powder nozzles in selective laser melting of polymers." Proceedings of the Lasers in Manufacturing Conference 2019, Munich 2019.