When it comes to printing polycarbonate or ABS prototypes, FDM or Fused Deposition Modeling is one AM technology you can rely on. FDM 3D printed shapes are robust and are well suited for non visible parts where surface finishing is not critical.
The process depends on building up the model layer-by-layer using a thermoplastic filament. The filament is unwound from a coil and supplies material to an extrusion nozzle. The filament melts as it flows through the heated extrusion head and emerges as a thin ribbon through an exit nozzle one layer upon another, the model is built from the bottom up. The required object is produced as a three-dimensional solid part in a single stage without need for Tooling.