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Rapid Prototyping

Rapid PrototypingStereo lithography is an additive manufacturing process using liquid UV-curable photopolymer and a UV laser to build parts a 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, solidifies the pattern traced on the resin and adheres 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".  Then, a resin-filled blad sweeps across the part cross section, re-coating it with fresh material.  On this new liquid surface, the subsequent layer of pattern is traced.  This process is repeated until the complete 3-D part is formed.  After building, parts are cleaned of excess resin by immersion in a chemical bath and then cured in a UV oven.


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