Investigation of process parameter effect on anisotropic properties of 3D printed sand molds
Résumé
The development of sand mold three-dimensional
printing technologies enables the manufacturing of molds
without the use of a physical model. However, the effects of
the three-dimensional printing process parameters on the mold
permeability and strength are not well known, leading the
industries to keep old settings until castings have recurring
defects. In the present work, the influence of these parameters
was experimentally investigated to understand their effect on
the mold strength and permeability. Cylindrical and barshaped
test specimens were printed to perform, respectively,
permeability and bending strength measurements.
Experiments were designed to statistically quantify the individual
and combined effect of these process parameters.
While the binder quantity only affects the mold strength, increasing
the recoater speed leads to both greater permeability
and reduced strength due to the reduced sand compaction.
Recommendations for optimizing some 3D printer settings
are proposed to attain predefined mold properties and minimize
the anisotropic behavior of the sand mold in regard to
both the orientation and the position in the job box.
Origine : Fichiers produits par l'(les) auteur(s)
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