期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：233
期号：3
页码：032004
DOI：10.1088/1755-1315/233/3/032004
出版社：IOP Publishing
摘要：Fused deposition modeling, as one of the most widely used types of 3D printing, is undoubtedly a good method when it comes to personalizing custom production and producing some complicated parts which cannot be machined by cutting tools. However, existing FDM printers are restricted to printing only monochrome objects due to the poor mixing quality and nozzle blockage caused by the irrational structure of nozzle. In this paper, the 3D model of the color mixing nozzle is designed by SolidWorks software at first. Second, the temperature field and the stress field are simulated by using ANSYS software. Comparing the simulation results, the main reason for the blockage at the notch of the throat pipe is revealed. Some other design flaws, including the position of the thermistor, the shape of the flow channel and the material selection of each component, are found out and optimally modified. Finally, the nozzle is optimized, and the rationality of the optimization design is verified by thermal-mechanical coupling field analysis. The problem of nozzle blockage in the printing process is settled, and the printing quality and stability are significantly improved.
