• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2020, Vol. 56 ›› Issue (9): 243-251.doi: 10.3901/JME.2020.09.243

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Research on Stable Jetting of Nanoparticle Suspension Ink for Inkjet 3D Printing

ZHU Dongbin, WU Minqiang, WANG Zhuxian, YANG Weidong   

  1. School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130
  • Received:2019-05-14 Revised:2019-11-19 Online:2020-05-05 Published:2020-05-29

Abstract: In the inkjet 3D printing process, stable jetting of ink in the form of a single droplet is an important factor affecting the quality of inkjet printing. However, at the moment of micro-droplet ejection, rheology of the nanoparticle suspension ink changes with the shear rate significantly, affecting the stable ejection of micro-droplet. The inkjet printing finite element model with variable viscosity is established by building the relationship between ink viscosity and shear rate. And the variation rule and effect mechanism of droplet viscosity, droplet speed and droplet morphology during inkjet printing process are studied. It is confirmed that capillary force is an important factor leading to the instability of droplets. In the end, CA-Z (Capillary-ohnesorge reciprocal, CA-Z) evaluation method for stable jetting of the nanoparticle suspension ink is proved by micro-droplet ejection experiment and numerical simulation, which offered theoretical and experimental basis for the preparation of nanoparticle suspension ink and the optimization of inkjet 3D printing parameters.

Key words: inkjet 3D printing, stable injection, numerical simulation, nanoparticle suspension ink, additive manufacturing

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