Abstract
In this paper, polyamide 6 single layer laser sintering process was investigated. A moving volumetric heat source model that involves the energy function morphology was simulated, and the temperature field distribution of a single layer of polyamide 6 powder was investigated using the finite element method, with different scan space and preheating temperature. The sintering processes were conducted on several batch of single layer with original thickness of 0.5 mm, which consists of 80 mesh polyamide 6 powders. Then the percentage of porosity was calculated and tensile stress of was tested. The results indicate that the scanning space strongly affect the percentage of porosity. For example, the percentage of porosity reaches 45.1 % when the scanning space increases from 0.25 to 0.45 mm. The results also indicate that the preheating and holding temperature strongly affect the mechanical properties. For example, the max tensile test stress increased from 2.04 to 4.10 MPa when the temperature rises from 50 to 150 °C, while the percentage of porosity shows very limited shift, reducing by only 9.54 %.
Similar content being viewed by others
References
Yan C, Shi Y, Yang J, Liu J (2010) Investigation into the selective laser sintering of styrene–acrylonitrile copolymer and postprocessing. Int J Adv Manuf Technol 51:973–982
Salmoria GV, Leite JL, Vieira LF, Pires ATN, Roesler CRM (2012) Mechanical properties of PA6/PA12 blend specimens prepared by selective laser sintering. Polym Test 31(3):411–416
Childs THC, Tontowi AE (2001) Selective laser sintering of a crystalline and a glass-filled crystalline polymer: experiments and simulations. J Eng Manuf 215(11):1481–1495
Muñoz S, Anselmi-Tamburini U (2012) Parametric investigation of temperature distribution in field activated sintering apparatus. Int J Adv Manuf Technol 65(1–4):127–140
Franco A, Lanzetta M, Romoli L (2010) Experimental analysis of selective laser sintering of polyamide powders: an energy perspective. J Clean Prod 18(16–17):1722–1730
Yin J, Zhu H, Ke L, Lei W, Dai C, Zuo D (2012) Simulation of temperature distribution in single metallic powder layer for laser micro-sintering. Comput Mater Sci 53(1):333–339
Olakanmi EO, Cochrane RF, Dalgarno KW (2011) Densification mechanism and microstructural evolution in selective laser sintering of Al-12Si powders. J Mater Process Technol 211(1):113–121
Van Hooreweder B, De Coninck F, Moens D, Boonen R, Sas P (2010) Microstructural characterization of SLS-PA12 specimens under dynamic tension/compression excitation. Polym Test 29(3):319–326
Leit JL, Salmoria GV, Paggi RA, Ahrens CH, Pouzada AS (2012) Microstructural characterization and mechanical properties of functionally graded PA12/HDPE parts by selective laser sintering. Int J Adv Manuf Technol 59:583–591
Yagi S, Kunii D, Wakao N (1960) Studies on axial effective thermal conductivities in packed beds. AICHE J 6(4):543–546
Delaunay D, Le Bot P, Fulchiron R, Luye JF, Regnier G (2000) Nature of contact between polymer and mold in injection molding. Polym Eng Sci 40(7):1682–1691
Masse H, Arquis E, Delaunay D, Quilliet S, Le Bot PH (2004) Heat transfer with mechanically driven thermal contact resistance at the polymer-mold interface in injection molding of polymers. Int J Heat Mass Transf 47(8–9):2015–2027
Dusunceli N, Colak OU (2008) Modelling effects of degree of crystallinity mechanical behavior of semicrystalline polymers. Int J Plast 24:1224–1242
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Zhou, W., Wang, X., Hu, J. et al. Melting process and mechanics on laser sintering of single layer polyamide 6 powder. Int J Adv Manuf Technol 69, 901–908 (2013). https://doi.org/10.1007/s00170-013-5113-8
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00170-013-5113-8