Yu Kaicheng, Gao Qiang, Lu Lihua, Zhang Peng
School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China.
Research Center of Precision Equipment and Technology, Chongqing Research Institute of HIT, Chongqing 400000, China.
Materials (Basel). 2022 Mar 26;15(7):2454. doi: 10.3390/ma15072454.
Process parameters have a significant impact on the filament diameter of extrusion 3D printing. To precisely control filament diameter, this paper proposes a novel method based on experiments to guide process parameter design. Additionally, an extrusion 3D printing device was developed, by which the influence of crucial process parameters and rheological properties on the diameter of printed filaments could be investigated experimentally and theoretically. Furthermore, poly (l-lactide-co-ε-caprolactone) (PLCL) was used as a case study to detail the design procedure of the proposed method. The printable range of the process parameters for PLCL was acquired, and a fitting surface for the experimental data was calculated to guide the process parameter design. According to the results of the experiment, by adjusting the process parameters, PLCL filaments with five different diameters of 120, 130, 140, 150, and 160 μm can be fabricated with a 100 μm nozzle. The deviations between the actual filament diameters and the desired diameter are less than 5 μm, which validates the reliability of the proposed method.
工艺参数对挤出式3D打印的丝材直径有显著影响。为精确控制丝材直径，本文提出一种基于实验的新方法来指导工艺参数设计。此外，还开发了一种挤出式3D打印装置，利用该装置可从实验和理论两方面研究关键工艺参数及流变性能对打印丝材直径的影响。此外，以聚（L-丙交酯-共-ε-己内酯）（PLCL）为例详细说明了所提方法的设计过程。获取了PLCL工艺参数的可打印范围，并计算了实验数据的拟合曲面以指导工艺参数设计。根据实验结果，通过调整工艺参数，使用100μm的喷嘴可制造出直径分别为120、130、140、150和160μm的五种不同直径的PLCL丝材。实际丝材直径与期望直径之间的偏差小于5μm，这验证了所提方法的可靠性。
