Stereolithography is a 3D printing technology known for achieving highly detailed and functionally accurate parts. The technology utilizes a mirror that is programmed to direct an ultraviolet laser to draw and cure a part’s cross-section onto a vat of photopolymer resin. After each layer, the build platform lowers and a recoater blade wipes over a new layer of material on the top of the tank. Once the part is complete, it is removed from the build chamber, cleaned of support and excess resin and then placed in a UV oven for further curing. This ensures the part reaches its optimal physical properties.
Stereolithography (SLA) is an additive manufacturing process that belongs to the Vat Photopolymerization family. In SLA, an object is created by selectively curing a polymer resin layer-by-layer using an ultraviolet (UV) laser beam. The materials used in SLA are photosensitive thermoset polymers that come in a liquid form.
SLA has many common characteristics with Direct Light Processing (DLP), another Vat Photopolymerization 3D printing technology. For simplicity, the two technologies can be treated as equals.
A laser beam is directed in the X-Y axes across the surface of the resin according to the 3D data supplied to the machine (the .stl file), whereby the resin hardens precisely where the laser hits the surface. Once the layer is completed, the platform within the vat drops down by a fraction (in the Z axis) and the subsequent layer is traced out by the laser. The resin that is not touched by the laser remains in the vat and can be reused. This continues until the entire object is completed and the platform can be raised out of the vat for removal.
Support structure is always required in SLA. Support structures are printed in the same material as the part and must be manually removed after printing. The orientation of the part determines the location and amount of support. It is recommended that the part is oriented so that so visually critical surfaces do not come in contact with the support structures
|color||property||Tensile Strength(MPa)||Melting Temperature°C|
|62.63||65.02||4.28||190 – 220|
|COLOR||PROPERTY||Tensile Strength (MPA)||Burnout Temperature|
Minimum Wall thickness: 1.2 mm
Minimum details size: 2 mm (for text/ hole diameters etc)
Layer thickness: 0.1 mm – 0.3 mm
Max dimensions: 650 x 600 x 600 mm. Large parts can be created with assembling individual parts by interlocking designs or glueing together.
Standard Accuracy: ± 0.3% (with lower limit on ± 0.3 mm).
Lead Time: Minimum 2 working days for despatch
Surface finish: visible layers with texture.
Basic: Support Removal, Curing, Sanding, Smoothing
Add on: Primer, Coating/ Painting