Stereolithography Apparatus (SLA) Prototypes
Stereolithography is an additive fabrication process utilizing a vat of liquid UV-curable photopolymer "resin" and a UV laser to build parts one layer at a time. On each layer, the laser beam traces a part cross-section pattern on the surface of the liquid resin. Exposure to the UV laser light cures, or 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, typically 0.05 mm to 0.15 mm (0.002" to 0.006"). Then, a resin-filled blade sweeps across the part cross section, re-coating it with fresh material. On this new liquid surface the subsequent layer pattern is traced, adhering to the previous layer. A complete 3-D part is formed using this process. After building, parts are cleaned of excess resin by immersion in a chemical bath and then cured in a UV oven.
One of the advantages of using the SLA process is that a much smoother surface finish is achievable, and subsequently, smaller features turn out better. The SLA process also gives a much more compact and homogeneous fill as compared to FDM prototypes. One drawback to SLA models is their thermal instability. Although some of the newer resins are becoming more suited to resisting effects of temperature, they typically still under-perform in this aspect when compared to a real thermoplastic like ABS.
Quick Reference Guide
| Available Material | Build Chamber Size | Layer Resolution | Available Colors | Post Processing Available |
|---|---|---|---|---|
| DSM SOMOS 11122 XC Accura 25 DSM SOMOS 9420 EP Accura 60 NanoTool |
Standard resolution High resolution |
Standard resolution High resolution |
Clear White Natural |
Mill |
To receive a quote please use our online quote form or email your STL files to quote@360prototyping.com.
Typical response time is within 1 hour but please allow up to 4 business hours for part quotes.