Optimization design of color mixing nozzle based on multi physical field coupling

2018 International Conference on Construction, Aviation and Environmental Engineering

生态环境科学;生物科学

Chen, Yankai^1 ; Shi, Tingchun^2 ; Lu, Liangliang^2 ; Yue, Xiuyan^3 ; Zhang, Jianhui^1

Hangzhou Dianzi University of Mechanical Engineering, Hangzhou 310018, China^1

Hangzhou Dianzi University Institute for Biomedical Engineering and Instrumentation, Hangzhou

310018, China^2

Hangzhou Dianzi University Library, Hangzhou

310018, China^3

关键词: ANSYS software;    Material selection;    Multi-physical fields;    Optimization design;    Printing process;    Printing quality;    Solidworks software;    Thermal-mechanical coupling;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/233/3/032004/pdf
DOI  :  10.1088/1755-1315/233/3/032004

来源: IOP

【 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.