Cavity prediction in sand mould production applying the DISAMATIC process

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Abstract

The sand shot in the DISAMATIC process is simulated by the discrete element method (DEM) taking into account the influence and coupling of the airflow with computational fluid dynamics (CFD). The DEM model is calibrated by a ring shear test, a sand pile experiment and a slump test. Subsequently, the DEM model is used to model the propagation of the green sand inside the mold chamber and the results are compared to experimental video footage. The chamber contains two cavities designed to quantify the deposited mass of green sand. The deposition of green sand in these two cavities is investigated with three cases of different air vent settings which control the ventilation of the chamber. These settings resulted in different air- and particle-velocities as well as different accumulated masses in the cavities, which were successfully simulated by the model.
Original languageEnglish
JournalPowder Technology
Volume321
Pages (from-to)204-217
ISSN0032-5910
DOIs
Publication statusPublished - 2017

Keywords

  • DISAMATIC process
  • Sand casting
  • Green sand
  • Granular flow
  • Discrete element method

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