Zárybnická Lucie, Petrů Jana, Krpec Pavel, Pagáč Marek
Department of Technical Studies, College of Polytechnics Jihlava, Tolstého 16, 586 01 Jihlava, Czech Republic.
Department of Machining, Assembly and Engineering Technology, Faculty of Mechanical Engineering, VSB-TU Ostrava, 17. Listopadu 2172/15, 708 00 Ostrava, Czech Republic.
Polymers (Basel). 2022 Mar 15;14(6):1172. doi: 10.3390/polym14061172.
3D printing, also known as additive manufacturing, is becoming increasingly popular for prototype processing in industrial practice. Laser sintering, which is a laser powder bed fusion technique, is a versatile and common 3D printing technology, which enables compact and high-quality products. Polyamide 12, a popular 3D printing material, provides reliable mechanical and thermal properties. Weaknesses in applying this technology for polyamide 12 include incomplete information regarding the application of various types of additives and different printing orientations with respect to the properties. This study aimed to investigate the influence of various additives (including carbon fiber, glass fiber, flame retardant, and aluminum powder) combined with polyamide 12, using processing of predefined powder refreshing mixture on the properties of a finished product. The thermal, surface, and mechanical properties of samples printed with five different polyamides 12-based powders at three different print orientations were investigated. It was found that the inclusion of additives decreases the tensile strength and increases the surface roughness of printed components-however, the toughness increases. The results can assist designers in selecting an appropriate material that will produce a finished part with the required properties for a given application.
3D打印，也被称为增材制造，在工业实践中的原型加工中正变得越来越受欢迎。激光烧结作为一种激光粉末床熔融技术，是一种通用且常见的3D打印技术，能够制造出紧凑且高质量的产品。聚酰胺12作为一种流行的3D打印材料，具有可靠的机械和热性能。将该技术应用于聚酰胺12的不足之处包括，关于各类添加剂的应用以及不同打印方向对性能影响的信息不完整。本研究旨在通过对预定义的粉末更新混合物进行加工，来研究各种添加剂（包括碳纤维、玻璃纤维、阻燃剂和铝粉）与聚酰胺12相结合对成品性能的影响。研究了在三种不同打印方向下用五种不同的聚酰胺12基粉末打印的样品的热性能、表面性能和机械性能。结果发现，添加添加剂会降低打印部件的拉伸强度并增加表面粗糙度，不过韧性会提高。这些结果可以帮助设计师选择合适的材料，从而制造出具有给定应用所需性能的成品部件。
