Abstract
Two important factors affecting the performance of sand mold/core generated by 3D printing (3DP) are strength and dimensional accuracy, which are not only closely related to the reactivity of furan resin and the phase transition of silica sand, but also the curing agent system of furan resin. This paper studies the influence of gel time on the strength and dimensional accuracy of a 3DP sand mold/core, taking the furan resin system as an example and using a sand specimen generated by a 3DP inkjet molding machine. The experiment demonstrates that the gel time of 3 to 6 min for the sand mixture suits 3DP core-making most under the experimental condition. However, it should be noted that under the same resin condition, the strength of a no-bake sand mold/core is higher than that of a 3DP sand mold/core. The dimensional accuracy of the sand mold/core does not change significantly when the gel time is less than 15 min. Improving the activity of binder and developing ultra-strong acid with low corrosion shall be an effective way to improve the quality of the mold/core by 3D printing.
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References
Upadhyay M, Sivarupan T, Mansori EI M. 3D printing for rapid sand casting — A review. Journal of Manufacturing Processes, 2017, 29: 211–220.
Wang J Y, Sama S R, Manogharan G. Re-thinking design methodology for castings: 3D sand-printing and topology optimization. International Journal of Metalcasting, 2019, 13(1): 2–17.
Hackney P M, Wooldridge R. 3D sand printing for automotive mass production applications. International Journal of Rapid Manufacturing, 2017, 6(2–3): 134–54.
Kang J W, Shangguan H L, Peng F, et al. Cooling control for castings by adopting skeletal sand mold design. China Foundry, 2021, 18(1): 18–28.
Mitra S, Rodríguez de C A, Mansori El M. The effect of ageing process on three-point bending strength and permeability of 3D printed sand molds. The International Journal of Advanced Manufacturing Technology, 2018, 97(1–4): 1241–1251.
Bryant N, Frush T, Thiel J, et al. Influence of machine parameters on the physical characteristics of 3D-printed sand molds for metal casting. International Journal of Metalcasting, 2020, 15(2): 361–372.
Hackney P M, Wooldridge R. Characterisation of direct 3D sand printing process for the production of sand cast mould tools. Rapid Prototyping Journal, 2017, 23(1): 7–15.
Voxeliet. GS19RP. https://strobel-quarzsand.de/Produkte_en/Giessereisand_en.html
Yang W D, Jia P F, Ma Y Y, et al. Modeling and simulation of binder droplet infiltration in 3D printing technology. Nanotechnology and Precision Engineering, 2017, 15(4): 246–253.
Hu P S. Molding sand. Shanghai Science and Technology Press, Shanghai China, 1994.
Li H. Optimization of patternless casting manufacturing based on additive manufacturing technology. Master dissertation, Taiyuan: Taiyuan University of Technology, 2016. (In Chinese)
Yang W D, Xu X W, Jia P F. Simulation and research of adhesive penetration in the 3DP technology. Manufacturing Technology & Machine Tool, 2016, 10: 102–106. (In Chinese)
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This research was financially supported by the Liaoning Science and Technology Plan Program (2019-ZD-0998) and the National Natural Science Foundation of China (Grant No. U1808216).
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Yan-chun Lou Male, Ph. D., Researcher. His research interest mainly focuses on the precision forming of high-performance lightweight alloy and stainless steel casting, especially the electrode slag remelting casting.
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Wang, Y., Yu, Rl., Yin, Sk. et al. Effect of gel time of 3D sand printing binder system on quality of sand mold/core. China Foundry 18, 581–586 (2021). https://doi.org/10.1007/s41230-021-1085-8
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DOI: https://doi.org/10.1007/s41230-021-1085-8