SLA 3D Printing and Supports

SLA 3D Printing and Supports

SLA 3D printing uses a vat of liquid photopolymer resin and a laser to cure each layer.sla 3d printing A digital model is sliced into thin layers, then loaded onto the printer’s build platform which lowers into the resin tank until all the print layers are complete. The laser traces an image of each layer on top of the liquid resin, curing and solidifying it to form the finished part. Once the layer is complete, the printer moves the platform up a little, and the laser lights up again to trace another layer. The process repeats until the final printed part is complete.

Because of this precise and controlled printing process, parts produced by SLA are known for their fine resolution and detail, smooth surface finish, superior mechanical attributes, isotropy (consistent properties across X, Y, and Z planes), and watertightness.sla 3d printing Additionally, SLA offers high print speed and a wide range of materials.

With SLA, supports are necessary for printing overhangs and bridges which would otherwise not be possible to print without them.sla 3d printing Supports are printed in the same material as the part and are manually removed after the print is complete. The amount and location of the support structures depends on the orientation of the model – with models oriented vertically, they typically require more supports than those oriented horizontally.

Despite the need for supports, SLA’s ability to achieve high print speeds means that parts can be printed faster than other 3D printer technologies like FDM.sla 3d printing With SLA technology, it is also possible to print at a higher resolution than other technologies, allowing for finer details and tighter tolerances.

The ability to create a highly detailed and accurate finished part quickly is critical for businesses that need to produce prototypes or end-use parts at scale.sla 3d printing For example, in medical applications, SLA allows doctors to make custom surgical guides and anatomical models for patient-specific procedures such as surgery and prosthetics. In aerospace, SLA is used to create intricate and lightweight parts for aircraft and spacecraft, from prototypes to tooling to final end-use parts.

When used with a high-performance SLA 3D printer like the Form 4L, companies can make large, human-scale models and prints in under six hours, enabling same-day iterations to bring new products to market more quickly and efficiently than traditional machining methods. The speed and quality offered by SLA technology also helps manufacturers avoid the high costs and long lead times associated with outsourcing or utilizing more complex alternative methods such as injection molding.

Once the printed part is complete, it can be washed to remove any excess resin and further post-cured in a UV chamber to fully solidify the resin into a hardened plastic. Some parts may benefit from additional post-processing steps such as sanding, coating, plating, or media blasting to improve their aesthetics or performance.