Abstract
Additive manufacturing, or nowadays more popularly entitled as 3D printing, enables a fast realization of polymer, metal, ceramic or composite devices, which often cannot be fabricated with conventional methods. One critical issue for a continuation of this success story is the generation of multi-material devices. Whilst in fused filament fabrication or 3D InkJet printing, commercial solutions have been realized, in stereolithography only very few attempts have been seen. In this work, a comprehensive approach, covering the construction, material development, software control and multi-material printing is presented for the fabrication of structural details in the micrometer range. The work concludes with a critical evaluation and possible improvements.
Highlights
Starting with the brilliant invention described in “Apparatus for production of three-dimensional objects by stereolithography” in 1986 by Charles W
Hull [1], the development of different 3D printing techniques has happened at a brisk pace
In addition to stereolithography (SLA), a wide variety of methods are established under the umbrella of additive manufacturing, such as fused filament fabrication (FFF), 3D InkJet printing or powder-based printing (binder jetting, laser or electron sintering or melting (SLS, SLM, EBM))
Summary
Starting with the brilliant invention described in “Apparatus for production of three-dimensional objects by stereolithography” in 1986 by Charles W. In the case of SLA, the composite printing of ceramic-filled resins, curing and thermal post-processing has been commercialized [19,20]. For the additive manufacturing of polymeric multi-material components, three different methods should be considered: Extrusion-based techniques like FFF and the ones making use of curable resins, like 3D InkJet (PolyJet®) and SLA.
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