Selective Laser Sintering (SLS) harnesses high-powered lasers to selectively fuse powdered material, binding it together layer by layer to form a solid structure. It is frequently mistaken for a similar process known as Selective Laser Melting (SLM), differing in that it solely sinters the powders together rather than achieving full melting.
During the process, parts are supported by unsintered powder in each layer, which remains distributed across the build volume until each layer is fused. Upon completion, the part is extracted from the residual powder and manually cleaned, often utilizing water or air jets.
Although parts produced through this method can incorporate some metal, they typically consist of plastic composites that offer a favorable strength-to-weight ratio and are obtainable at a relatively low cost. While parts requiring structural integrity akin to forged solid metal necessitate Direct Metal Laser Sintering (DMLS), the exceptional precision, cost-effective feedstock, and capability to reach high temperatures with SLS printing render it a highly beneficial technology applicable across a wide spectrum of industries, from architectural modeling to aircraft control surfaces and surgical instruments.