Dalian University of Technology

Dazhi Wang

Junsheng Liang

Kai Li

Tongqun Ren

Kuipeng Zhao

The present invention belongs to the field of advanced manufacturing technology and relates to one set-up and method of electrohydrodynamic jet 3D printing based on resultant effect of electric field and thermal field. This method is used to fabricate micro/nano 3D structure, under the resultant effects of electro hydrodynamic force and thermal field. First of all, the ink reaches needle orifice at a constant speed under the resultant effect of fluid field and gravity field. Then a high voltage electric field is applied between needle and substrate. And the ink is dragged to form stable micro/nano scale jet which is far smaller than the needle size using the electric field shear force generated at needle orifice. The solvent evaporation rate of ink increases combined with the radiation of thermal field at the same time. Finally, the micro/nano scale 3D structure is fabricated on substrate with the accumulation of jet layer by layer. Compared with liquid jet printing technology, this method describing in present invention owns many advantages, including wide adaptability of material and manufacturing complex micro/nano scale 3D structures.

Set-up and method of electrohydrodynamic jet 3D printing based on resultant effect of electric field and thermal field

The present invention provides a method for electrohydrodynamic jet printing curved piezoelectric ceramics. First, a stable pressure is provided for a piezoelectric ceramic slurry to ensure that the slurry flows out from a nozzle at a fixed flow rate, and at the same time, an electric field is applied to the piezoelectric ceramic slurry at the nozzle to form a stable fine jet; then a curved substrate is fixed on a fixture of a curved substrate six-axis linkage module to ensure that the curved substrate is always perpendicular to the jet of the nozzle and keeps a constant distance from the nozzle during a printing process; fine jet drop on demand is realized through cooperative control of the changes of the curved substrate six-axis linkage module, the electric field and a flow field, and electrohydrodynamic jet printing and molding of curved piezoelectric ceramics is finally realized.

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Dalian, China

Dazhi Wang