Research on forming method of additive manufacturing of frozen sand mold

Haoqin Yang; Zhongde Shan; Dandan Yan; Jianpei Shi; Qinjiang Liu

doi:10.1016/j.heliyon.2023.e19340

Research on forming method of additive manufacturing of frozen sand mold

Heliyon. 2023 Aug 19;9(8):e19340. doi: 10.1016/j.heliyon.2023.e19340. eCollection 2023 Aug.

Authors

Haoqin Yang¹, Zhongde Shan¹, Dandan Yan¹, Jianpei Shi¹, Qinjiang Liu¹

Affiliation

¹ Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China.

Abstract

In order to promote the green and sustainable development of the foundry industry, it is necessary to further explore new methods and technologies for green foundry. This paper innovatively proposes a method of additive manufacturing of frozen sand mold, using water as the binder instead of resin binders for additive manufacturing in low-temperature environments, which effectively solves the problems of harmful gas emissions during the pouring process and the difficulty of direct recycling of molding sand, and realizes high-performance green casting of complex castings. In this paper, the liquid-solid phase transition mechanism of the binder for additive manufacturing of frozen sand mold and the change law of the normal temperature field and phase transition field of the pre-cooled powder bed porous medium at different temperatures are studied, and the process window of additive manufacturing of frozen sand mold is obtained, which provides a new green casting method for the foundry field.

Keywords: Additive manufacturing; Frozen sand mold; Microstructure; Porous materials.