In this study, we have developed and implemented a new DEM model to simulate a SF extrusion process to manufacture filaments for the 3D printing of LIB electrodes. The model describes the extrusion process at the mesoscale using a granular approach, considering a 3D geometric representation of a TSE with a recirculation circuit and the flow of materials inside. In addition, we explored the effects of extrusion process parameters and material formulations on the microstructural properties of the filaments.