Abstract
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 bar-shaped 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.
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Coniglio, N., Sivarupan, T. & El Mansori, M. Investigation of process parameter effect on anisotropic properties of 3D printed sand molds. Int J Adv Manuf Technol 94, 2175–2185 (2018). https://doi.org/10.1007/s00170-017-0861-5
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DOI: https://doi.org/10.1007/s00170-017-0861-5