Fused filament fabrication is considered one of the most used processes in additive manufacturing rapid prototypes out of polymeric material. Poor strength of the deposited layers is still one of the main critical problems in this process, which affects the mechanical properties of the final parts. To improve the mechanical strength, investigation into various process parameters must be considered. In this article, the influence of different process parameters has been experimentally investigated by means of physicochemical and mechanical characterizations. Special attention was given to the thermal aspect. In that respect, the in situ measurement of temperature profile during deposition indicated that several parameters affect the cooling rate of material and consequently have an influence on the final parts. It was found that the influence of increasing the extruder temperature is more significant in comparison with other process parameters.

中文翻译：

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工艺参数对熔丝制备聚乳酸热力学性能的影响

熔融长丝制造被认为是用聚合物材料快速制造快速原型中最常用的工艺之一。沉积层的强度差仍然是该过程中的主要关键问题之一，其影响最终零件的机械性能。为了提高机械强度，必须考虑对各种工艺参数的研究。在本文中，已通过物理化学和机械表征方法对不同工艺参数的影响进行了实验研究。特别注意了散热方面。在这方面，沉积过程中温度分布的原位测量表明，几个参数会影响材料的冷却速度，因此会对最终零件产生影响。