期刊
RAPID PROTOTYPING JOURNAL
卷 27, 期 7, 页码 1398-1407出版社
EMERALD GROUP PUBLISHING LTD
DOI: 10.1108/RPJ-05-2021-0105
关键词
Design; Additive manufacturing; Roughness; Post-processing; Material extrusion; Sand blasting; Surface improvement; Quality
This study investigated the possibility of improving the surface quality of PLA parts manufactured by FFF using the shot blasting technique, showing significant improvements in surface roughness with long exposure times and high pressure conditions. The technique is not only cost-effective and versatile, but also suitable for parts of various sizes and geometries.
Purpose Fused filament fabrication or fused deposition modeling (FFF/FDM) has as one of its main restrictions the surface quality intrinsic to the process, especially linked to the layer thickness used during manufacture. The purpose of this paper is to study the possibility of improving the surface quality of polylactic acid (PLA) parts manufactured by FFF using the shot blasting technique. Design/methodology/approach The influence of corundum blasting on 0.2 mm layer thickness FDM PLA parts treated with two sizes of abrasive, different exposure times and different incidence pressures. Findings As a result, improvements of almost 80% were obtained in the surface roughness of the pieces with high exposure times, and more than 50% in just 20 s. Originality/value This technique is cheap, versatile and adaptable to different part sizes and geometries. Furthermore, it is a fast and environmentally friendly technique compared to conventional machining or vapor smoothing. Despite this, no previous studies have been carried out to improve the quality of this technology.
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