PU Zhixin， WU Zhilong， JIA Jialiang， ZHANG Qilu

(College of Mechanical Engineering, Liaoning Technical University, Fuxin 123000, China)

Abstract: The flow characteristics in molding cavity of 3D printer equipment were numerically simulated based on computational fluid dynamics (CFD). Physical model was built with a small 3D printer. The reason for the large amount of smoke in the forming chamber of the 3D printing equipment was analyzed using the method of solid particle track tracing, and the problems were explained in actual production process. Regularities were qualitatively analyzed which impacted by changing the height of the blow hole and the distance between the blowing and suction holes in the chamber. The results show that the serious laminar gas diffusing is the reason for the large amount of smoke in the cavity. Eddy current phenomenon is produced inside and the retention time of small solid particles in the cavity is increased. The amounts of smoke in the chamber can be minimized when the height of the blow hole is 22 mm and the distance is 32～37 mm between the blow hole and the upper surface.

Keywords: computational fluid dynamics; 3D printer; trajectory tracking; blowing and suction hood

中图分类号：TB44

文献标志码：A

文章编号：1008-5548(2021)02-0022-08

DOI:10.13732/j.issn.1008-5548.2021.02.004

收稿日期： 2020-09-04， 修回日期：2020-10-05，在线出版时间：2020-12-26 15:33。

第一作者简介：蒲志新(1973—)，男，硕士，副教授，硕士生导师，研究方向为先进制造系统与应用。E-mail：puzhixin@126.com。

通信作者简介：武志龙(1994—)，男，硕士研究生，研究方向为先进制造系统与应用。E-mail：2397968550@qq.com。