About the technology SLS


That’s how selective laser sintering works

Selective laser sintering is an innovative and highly effective method to produce 3D objects of various complexities. 


It all starts with a digital model. Within the process, plastic powder gets exposed by laserlight. Like this, we melt the plastic layer by layer until we get full body plastic parts. But let us check out the SLS-technology and the single steps in detail – starting with data preparation until the finish and final testing of the parts:

Data preparation

You send us your 3D CAD-data as STEP- or STL-files. Data safety is very important to us, so your data will be stored with highest encryption. We then slice your model to layers of a thickness between 0.06 and 1.2 mm which are then the lighting information for our lasers.

Manufacturing

The subsequent production process is largely autonomous. In SLS technology, we practically always manufacture overnight, which also enables express deliveries the very next day. The subsequent cooling time corresponds approximately to the construction time and must be added to the production planning.


Plastic powder is applied in the pre-heated build chamber, which is then selectively melted by either CO2 or glass fiber lasers at the point where the contour is required. After each successfully exposed layer, the powder bed is lowered by one layer thickness and new powder is applied using a squeegee or roller. The process is then repeated from the beginning. The unexposed powder serves as a support material during the process, enabling the production of a large number of parts in the same installation space.

Dismantling the machine

After a controlled cooling period in the machine, the swap bodies are ready to go to the unpacking station. The machines are then carefully cleaned and prepared for the next job.

Unpacking and cleaning of parts

The parts will be carefully removed by hand out of the powder cake and then roughly cleaned. For the final finish, a blasting follows by glass beads in order to fully remove all sticking powder.

Materials

You wish to know more about the materials which are available with Rapid Manufacturing? You will find all details in the PDF documents below:

Finishing of sintered parts


On request, we can finish your parts with various processes such as: 

  • Tumbling
  • Dye colouring
  • Painting
  • Polishing
  • And much more
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