SLS operation principle is powder sintering with the help of infrared laser in elevated temperature which helps the grains of the powder to consolidate before being bound with the laser beam. In the conventional SLS printer, there is a so-called “bed” on which the roller spreads a thin layer of powder followed by sintering according to the layers sliced from a 3D model file (e.g. a .stl file (derived from CAD-like designing software).
How it works
Afterward, the platform moves down by a small increment, and the process repeats until the last layer is formed. After the process comes the post-processing part which requires removing the model from the unsintered powder suspension and sandblasting it. There is where the real advantage of SLS comes in. Unlike FDM, SLS is available to 3D print without any support structures for models with complex geometry for they are suspended in powder. Moreover, one can easily print moveable objects right away.
The main advantage of Selective Laser Sintering among all the Additive Manufacturing technologies is the freedom of form that it gives to the designer.
High precision combined with the self-supporting features of powder make it possible to print movable parts or enclosed objects.
Model packing and printing costs
Thanks to the way that SLS works, the printing price is not a linear relation of the printed volume. The more objects you print and the tighter they are packed in the print BED, the lower the cost per object is.
Our service center is based on two types of SLS 3D printers that we manufacture. The flagship Lisa PRO and the entry-level printer Lisa. There are both the hearts of our SLS solution. Check the full specifications to learn the requirements of the models for 3D printing.
Although Selective Laser Sintering gives designers a huge freedom of shape, there are some limitations that need to be taken into consideration if you choose to use this technology.
Learn more about the recommendations and requirements for SLS designs to be printed on Sinterit Lisa and Lisa PRO.