Selective Laser Sintering (SLS)

additive manufacturing of finished parts/products of any shape

machine, automotive, aviation, medical, construction industries

Selective laser sintering is a technique for the additive manufacturing of finished parts/products of any shape that are joined by a laser. A layer of powdered metal is placed on the machine’s work table and selectively sintered in an area defined by the shape of this layer using a concentrated photon beam generated by a laser. Depending on the design of the machine, movement in the Z (vertical) axis is performed by the work table or the head. When the work is complete, the item is extracted from the unsintered powder. Unlike the selective melting of SLM materials, the SLS process does not completely melt the powder materials.

Alternative technologies
  • sintering
  • casting
  • machining
  • ability to produce parts with very complex shapes (impossible to achieve with machining)
  • high mechanical properties of the products
  • possibility to print several elements in one process (depending on dimensions)
  • high geometric repeatability of manufactured parts
  • relatively high roughness of machined surfaces and higher porosity (compared to parts produced by conventional methods)
  • the technique is not suitable for batch production/mass production
  • high investment cost
  • the need to control the machine’s operating environment (air purifiers and humidity/temperature control)
  • printing of individual components/parts is not cost-effective
  • metals
  • metal carbides
  • prototypes and small batch production of automotive components (engine housings/bumpers/interior components)
  • rapid prototypes of various parts used in industry (e.g. housings or machine components)
  • prototypes of surgical implants/prostheses/components used in the medical field
  • prototypes of personalized and ergonomic sports shoes
  • SLS printer equipped with technological laser
  • metal powders
  • operating gases
  • training in metal sintering
  • training in CAD/CAM systems

Water consumption

Energy consumption

Waste generated

Competitiveness

Usability

Environmental impact

  • West Pomeranian University of Technology
  • AGH University of Krakow
  • Warsaw University of Technology
  • Poznan University of Technology
  • Cracow University of Technology
  • none