The importance of rheological behavior in the additive manufacturing technique material extrusion

By M. Mackay. Journal of rheology, 2018

229 citations recorded by the source corpus.

Material extrusion (ME), sometimes called Fused Deposition Modeling® or Fused Filament Fabrication, is an additive manufacturing technique that places order 300  μm diameter molten polymer filaments sequentially onto a moving substrate to build an object. The feed material is a solid fiber that acts like a continuous piston in a heated barrel, which plasticates itself to push molten material through a nozzle. The barrel pressure is substantial, of order 30 MPa ( ≈4000 psi), and similar to that developed in contemporary polymer processing. The similarity does not end here with all the non-Newtonian and viscoelastic effects and heat transfer limitations that challenge extrusion operations coming to bear in the ME. These will be discussed in this review with suggestions of areas of study.Material extrusion (ME), sometimes called Fused Deposition Modeling® or Fused Filament Fabrication, is an additive manufacturing technique that places order 300  μm diameter molten polymer filaments sequentially onto a moving substrate to build an object. The feed material is a solid fiber that acts like a continuous piston in a heated barrel, which plasticates itself to push molten material through a nozzle. The barrel pressure is substantial, of order 30 MPa ( ≈4000 psi), and similar to that developed in contemporary polymer processing. The similarity does not end here with all the non-Newtonian and viscoelastic effects and heat transfer limitations that challenge extrusion operations coming to bear in the ME. These will be discussed in this review with suggestions of areas of study.

Subfields: Automotive Engineering, Biomedical Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/7328a6a721dd6721bddd2cfba43df518a2260112

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Citations in the corpus

• Fractional viscoelastic models for power-law materials. (2020, background): “The material flow behaviour during extrusion affects both the processing time required, and the strength of the final printed object [1, 2].”