Mi Dashan, Yang Tao, Jiang Jinghua, Bai Haiqing, Jia Shikui
School of Mechanical Engineering, Shaanxi University of Technology, Hanzhong 723001, China.
School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong 723001, China.
Polymers (Basel). 2025 Jun 22;17(13):1739. doi: 10.3390/polym17131739.
Extrusion-based printers have attracted much attention for their simplified printing process and broader material compatibility. Carbon fibers (CF), known for their excellent mechanical properties, are incorporated into polypropylene (PP) printing materials. This study presents a shear screw printer (SSP) with a modified screw design. The SSP generates torsional shear forces, enabling helical orientation of CFs within PP/CF composites. The study also compares the SSP's performance with that of a conventional screw printer (CSP). PP/CF composite specimens containing 15% CF were printed at four different layup angles: 0°, 45°, 90°, and ±45° (net). The results show that combining CFs' helical orientation with a net printing arrangement can effectively enhance tensile properties while reducing anisotropy. Furthermore, this approach can significantly mitigate warping in printed parts.
基于挤压的打印机因其简化的打印过程和更广泛的材料兼容性而备受关注。以其优异机械性能而闻名的碳纤维（CF）被纳入聚丙烯（PP）打印材料中。本研究提出了一种具有改进螺杆设计的剪切螺杆打印机（SSP）。SSP产生扭转剪切力，使CFs在PP/CF复合材料中呈螺旋取向。该研究还将SSP的性能与传统螺杆打印机（CSP）的性能进行了比较。含有15%CF的PP/CF复合试样以四种不同的铺层角度打印：0°、45°、90°和±45°（净）。结果表明，将CFs的螺旋取向与净打印排列相结合可以有效提高拉伸性能，同时降低各向异性。此外，这种方法可以显著减轻打印部件的翘曲。
