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산업용 SFF System에서의 Polyamide-6 파우더 소결 공정 개발
배성우(Sung-Woo Bae),김동수(Dong-Soo Kim),김형일(Hyung-Il kim),김충환(Chung-Hwan Kim),조정대(Jung-Dae Cho),최병오(Byung-Oh Choi) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
In this study, some kinds of polyamide-6 powders with different shape and particle size were fabricated to investigate the formability, the microstructure and mechanical properties. Also, to develop a more elaborate and rapid system, this study employs a new SLS device with a 3-axis dynamic focusing scanner system instead of the existing fθ lens used in commercial SLS. Polyamide-6 powders having the average size of 100 ㎛ were treated thermally in order to keep the spherical symmetry in shape. These polyamide-6 powders were mixed with polyamide-12 powders having the average size of 50㎛ to give the bimodal distribution of size. These mixed powders showed the better fabrication in the selective laser sintering process because the smaller particles of polyamide-11 played an important role in the compact packing of powders by filling the void space between the large particles of polyamide-6. Also, Experiments have performed to evaluate the effect of a scanning path and sintering parameter.
CO₂ Laser에 의한 Polyamide-6 소결과 그 영향에 관한 연구
배성우(S. W. Bae),김동수(D. S. Kim),안영진(Y. J. Ahn),김형일(H. I. Kim),최기섭(K. S. Choi) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
In the solid freeform fabrication (SFF) system using selective laser sintering (SLS), polyamide-12 powder is currently recognized as general material. In this study, some kinds of polyamide-6 powders with different shape and particlesize were fabricated to investigate the formability, the microstructure and mechanical properties. Also, to develop a more elaborate and rapid system, this study employs a new SLS device with a 3-axis dynamic focusing scanner system instead of the existing f θ lens used in commercial SLS. Polyamide-6 powders having the average size of 100 m were treated thermally in order to keep the spherical symmetry in shape. These polyamide-6 powders were mixed with polyamide-12 powders having the average size of 50 m to give the bimodal distribution of size. These mixed powders showed the better fabrication in the selective laser sintering process because the smaller particles of polyamide-11 played an important role in the compact packing of powders by filling the void space between the large particles of polyamide-6. Also, Experiments have performed to evaluate the effect of a scanning path and sintering parameters by fabricating the various 3D objects.