How Selective Laser Sintering works? (video)3D Systems, explains how SLS works.
The machine used is a Vanguard Si
You can see the step by step process on 3Dsystems.com
– Mirrors direct the laser beam across the bed of powder
– The Co2 laser selectively scans the powder bed
– A new layer of powder is added, typically 0.1mm – 0.15mm
– This layer is then melted thus building the part layer-by-layer