Fused deposition modeling (FDM) is widely used in the rapid prototyping of polymers. Polyamide (PA) has excellent mechanical properties, but its application in FDM is limited due to its high water absorption, warpage, and forming shrinkage. The material of the filament and the printing parameters of the printer are two critical aspects that affect the performance of a component. The prepared PA6/PA66 (composite polyamide [COPA], PA6:PA66 = 85:15) composite (COPA: acrylonitrile butadiene styrene [ABS]: maleic anhydride grafted acrylonitrile butadiene styrene [ABS-g-MAH]: polyethylene = 800:133:67:100) has low water absorption (0.39%) and high dimensional stability, which has a good application prospect in FDM. The influence of eight FDM parameters, including three rarely reported, on the properties of PA6/PA66 composite specimens was investigated by the Taguchi method. The significance of influencing factors was evaluated by analysis of variance (ANOVA) and the stability by signal-noise ratio. When the layer thickness was 0.15 mm, the infill pattern was zigzags, the build plate adhesion type was brim, and the distance from the nozzle to the printing platform and the layer thickness (ΔL) was 0.05 mm; the specimens' dimensional accuracy, surface quality, and mechanical properties were better than other levels. The layer thickness and infill pattern were the two most important factors. The switch of the cooling fan and the temperature printing platform played a significant role in the specimens' dimensional accuracy and surface quality. ΔL tremendously influenced the thickness and warping degree of the specimens. The preparation of high-performance PA composites and the investigation of multiparameters by the Taguchi method provide a possible solution for applying polyamide in FDM.

中文翻译：

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通过田口法和方差分析，熔融沉积建模参数对 PA6/PA66 复合材料试样性能的影响

熔融沉积建模 (FDM) 广泛用于聚合物的快速原型制作。聚酰胺（PA）具有优异的机械性能，但由于其高吸水性、翘曲和成型收缩率，其在FDM中的应用受到限制。灯丝的材料和打印机的打印参数是影响组件性能的两个关键方面。制备的PA6/PA66（复合聚酰胺[COPA]，PA6:PA66=85:15）复合材料（COPA:丙烯腈丁二烯苯乙烯[ABS]:马来酸酐接枝丙烯腈丁二烯苯乙烯[ABS-g-MAH]:聚乙烯=800:133 :67:100)具有低吸水率(0.39%)和高尺寸稳定性，在FDM中具有良好的应用前景。八个 FDM 参数的影响，其中三个很少报道，采用田口法研究了 PA6/PA66 复合材料试样性能的变化。通过方差分析（ANOVA）评估影响因素的显着性，通过信噪比评估稳定性。当层厚为0.15 mm时，填充图案为锯齿形，打印平台附着类型为边缘，喷嘴到打印平台的距离和层厚（ΔL）为0.05 mm；试样的尺寸精度、表面质量和力学性能均优于其他等级。层厚度和填充图案是两个最重要的因素。冷却风扇和温度打印平台的开关对试件的尺寸精度和表面质量起着重要作用。ΔL极大地影响了试样的厚度和翘曲度。