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Simulation Study of Ink Droplet Spraying Based on Sand 3D Printing.

Hailong Song1, Ran Yan1, Lei Xia1

  • 1College of Mechanical Engineering, Chongqing University of Technology, Chongqing 400054, China.

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|June 27, 2025
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Summary
This summary is machine-generated.

This study enhances sand mold 3D printing by modeling piezoelectric jetting for precise micro-droplet control. It identifies optimal ink properties to improve droplet formation stability and accuracy in industrial applications.

Keywords:
droplet formationnumerical simulationsand mold 3D printingvolume of fluid model

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Area of Science:

  • Additive Manufacturing
  • Fluid Dynamics
  • Materials Science

Background:

  • Piezoelectric jetting devices are crucial for sand mold 3D printing but face challenges in precise micro-droplet formation.
  • On-demand inkjet printing technology offers potential for advanced sand mold manufacturing.

Purpose of the Study:

  • To investigate and optimize micro-droplet formation in piezoelectric jetting for sand mold 3D printing.
  • To establish a mathematical model for droplet ejection and simulate its behavior.

Main Methods:

  • Explanation of the piezoelectric shear-mode printhead working principle.
  • Development of a droplet ejection mathematical model using Computational Fluid Dynamics (CFD).
  • Numerical simulations of droplet generation, breakup, and flight using the Volume of Fluid (VOF) model in Fluent software.

Main Results:

  • Simulation-based investigation of key parameters: viscosity, surface tension, and inlet velocity.
  • Determination of appropriate ranges and recommended values for ink properties.
  • Identification of factors influencing droplet ejection stability and precision.

Conclusions:

  • The study provides crucial engineering insights for enhancing droplet formation in industrial sand mold 3D printing.
  • Optimized ink properties can significantly improve the stability and precision of the 3D printing process.
  • This research contributes to advancing on-demand inkjet printing applications in sand mold manufacturing.