Material extrusion (ME), sometimes called Fused Deposition Modeling® or Fused Filament
Fabrication, is an additive manufacturing technique that places order 300 μm diameter …

Fundamentals of polymer processing | CiNii Research CiNii 国立情報学研究所 学術情報
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Numerical modelling is increasingly supporting the analysis and optimization of
manufacturing processes in the production industry. Even if being mostly applied to …

Die-swell is a flow effect that occurs in polymer extrusion whereby the material experiences
rapid stress and dimensional changes upon exiting the nozzle orifice. Material extrusion …

The swelling of an extrudate initially performing a fully-developed tube flow is reconsidered
for a wide class of constitutive equations, including PTT, pom–pom and general network …

The appearance of surface distortions on polymer melt extrudates, often referred to as
sharkskin instability, is a long-standing problem. We report results of a simple physical …

A new device has been designed for the measurement of the die swell of extruded polymer
melts. According to the proposed procedure, samples can be collected, annealed, and …

The recent discovery of extrudate swelling in a variable-temperature Newtonian fluid shows
that a new theory of extrudate swelling is needed. Here we display an inelastic mechanism …

A theoretical and experimental study has been carried out on extrudate swell B, especially
the influence of rheological properties and applied take‐up force on the emerging melt. The …

A comparative experimental study of extrudate swell from long slit and capillary dies is
reported for rheologically characterized polystyrene and polypropylene melts. Generally …