SLA Stereolithography
SLA is a rapid prototype process in which a computer controlled high precision laser produces three dimensional models from a photosensitive polymer.
What is SLA?
Stereolithography a.k.a. SLA, is an additive fabrication process utilizing a vat of liquid UV-curable photopolymer resin and a UV laser to build parts a 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. 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 3D part is formed by this process. After building, parts are cleaned of excess resin by immersion in a chemical bath and then cured in a UV oven.
SLA requires the use of support structures to attach the part to the elevator platform and to prevent certain geometry from not only deflecting due to gravity, but to also accurately hold the 2-D cross sections in place such that they resist lateral pressure from the re-coater blade. Supports are generated automatically during the preparation of 3-D CAD models for use on the SLA machine, although they may be manipulated manually. Supports must be removed from the finished product manually.
Stereolithography (SLA), Selective Laser Sintering (SLS) and 3D Printing (3DP) are the core Rapid Prototyping Technologies utilized at Bastech, Inc.
We then enhance these rapid prototyping processes by offering reproductions, both plastic and metal, as well as rapid prototype tooling options. Here is a list of services we provide:
- 3DP - 3D Printing and Modeling Casting Patterns ("Bascast" Low/No Ash)
- 3DP - 3D Printing and Modeling Prototypes
- RTV - RTV Molding / Urethane Reproductions
- RTV - Urethane Assembly and Inspection Fixtures
- SLA - Stereolithography Prototypes
- SLA - Stereolithography Casting Patterns (QuickCast)
- SLS - Selective Laser Sintering "Duraform" Rapid Prototypes
- SLS - Selective Laser Sintering "CastForm" Investment Casting Patterns
- SLS - Selective Laser Sintering "LaserForm" Metal Rapid Prototypes
- SRP - Subtractive Rapid Prototyping
- Thermojet Wax Casting Patterns
- Advanced Part Finishing: Painting/Clearcoating/Etc.
- Full Model Mockups and Class A Trade Show Displays