In gas-assisted 3D printing,gas had a significant impact on the morphology of polymer filaments,so it was crucial to thoroughly study their internal mechanisms.For this purpose,this research optimized the design of gas-assisted 3D printing nozzles and conducted a series of experiments using 10％glass fiber reinforced polypropylene(GF/PP)to compare the differences in apparent and mechanical properties between traditional 3D printing and gas-assisted 3D printing products.The results showed that after introducing gas assistance,the introduction of gas assistance resulted in reduced shrinkage and deformation during the printing process,the dimensional accuracy in both horizontal and vertical directions increased by 4.3 and 1.7 times,respectively,and the shape and size were closer to the original model size;The introduction of gas assistance resulted in reduced shrinkage and deformation during the printing process;The surface roughness had also been reduced to 46％of traditional 3D printing,making the surface smoother and smoother.The tensile strength and elongation at break increased by 8.24％and 50.71％respectively,and these factors combined to improve the apparent quality and mechanical properties of printed products.
维普
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