主催: 一般社団法人 日本機械学会
Currently 3D printing technology has attracted much attention as new molding methods for carbon fiber reinforced thermoplastics (CFRTP). The purpose of this study is to investigate in situ resin impregnation during 3D printing of continuous carbon fiber reinforced plastics. The specimen was manufactured by fused deposition molding (FDM) using carbon fiber yarn including 3000 mono-filaments and polylactic acid (PLA) filament. Resin impregnation ratio measurement and tensile tests were conducted on the molded specimens in order to investigate the effect of process parameters during 3D printing on mechanical properties. As a result, the modeling temperature T and filament extrusion speed f were parameters that influenced the tensile strength. In this study, we recommend the modeling temperature T = 200°C and filament extrusion speed f=19 mm/min for the PLA composites. The layer height h was a parameter that remarkably influenced the impregnation ratio. The quality of the part can dramatically be improved by using continuous carbon fiber, so it was shown that this technology could be applied to various applications.