Stereolithography is an additive manufacturing process using liquid UV-curable photopolymer and a UV laser to build parts one layer at a time.
On each layer, the laser beam traces a cross-section pattern on the surface of the liquid resin. Exposure to the UV laser light cures and, solidifies the pattern while adhering it to the layer below.
After a pattern has been traced, the SLA's elevator platform descends by a single layer thickness (0.002" to 0.006") while a resin-filled blade sweeps across the part cross section, re-coating it with fresh material. This process is repeated until the complete 3D part is formed.
Once complete, parts are cleaned of excess resin by chemical bath immersion and then cured in a UV oven.
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