Design and Implementation of Electromagnetic Actuated Droplet Generator for Plaster-based 3D Printing

• Main Authors: Chen, Chun-Jui, 陳俊瑞
• Other Authors: Cheng, Pi-Ying
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/e7e3y4

碩士 === 國立交通大學 === 機械工程系所 === 105 === This paper proposed the design and evaluation process of a droplet generator which was applied in plaster-based 3D printing. The proposed 3D printing machine is designed for bio-medical applications, especially of the cases that liquid fluid cannot be heated or deformed dramatically during droplet creation. Two types of water droplet generator were presented in the study. The first type was combining the liquid jet nozzle with water column cutoff mechanism to form a water droplet. While for the second type, the water droplet is generated under the process of squeezing the water column through the syringe by using electromagnetic actuator. Experiments and simulations were arranged in this study to verify the parameters effect on droplet formation. In the study, three different kinds of droplet generator model are considered and simulated using ANSYS/FLUENT fluid dynamic simulation software. The purpose of the simulation is to establish the numerical model of droplet generator, and the simulation results can be helpful in choosing feasible actuating parameters for the experiments. As checking the simulation results, both of the water column cutoff mechanism and electromagnetic actuated droplet generator play a better performance in matching the experiment results. As comparing the efficiency of three types of droplet generator, electromagnetic actuated droplet generator can create smaller droplet (about 0.3mm) with faster speed. While the current performance of droplet size forming stability of electromagnetic actuated droplet generator need to be improved in the future study.