Simulation of binder migration behavior and bridge network morphology in frozen sand mold additive manufacturing

IF 4.1 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology Pub Date : 2025-06-14 DOI:10.1016/j.partic.2025.06.005

Haoming Shi , Zhongde Shan , Haoqin Yang , Dandan Yan , Weifei Song

引用次数: 0

Abstract

Frozen sand mold additive manufacturing is a new process that utilizes water-based binder phase transition freezing in a low-temperature environment to create sand molds. The aim is to reduce resin binder pollution. However, binder migration and phase transition behavior require further investigation. This study uses CFD method to numerically simulate the droplet size, injection frequency, and environmental temperature in the migration behavior of water-based binder. The results show that changes in process parameters lead to alterations in the binder migration path, which in turn affects the structure of the binder bridge network. The pore throat guides binder migration, leading to a higher concentration of binder near the sand layer surface. At 268 K, the freezing rate of the binder is much faster than the migration rate of the binder during the slow development stage, significantly affecting the migration behavior of the binder and the binder bridge network structure.

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冻砂模增材制造中粘结剂迁移行为及桥网形态模拟

冻砂模增材制造是一种利用水基粘结剂在低温环境下进行相变冻结制造砂模的新工艺。目的是减少树脂粘结剂污染。然而，粘结剂迁移和相变行为需要进一步研究。采用CFD方法对水基粘结剂的运移行为进行了数值模拟，模拟了液滴尺寸、注射频率和环境温度对水基粘结剂运移行为的影响。结果表明，工艺参数的改变会导致粘结剂迁移路径的改变，从而影响粘结剂桥网的结构。孔喉引导黏结剂运移，导致黏结剂在砂层表面附近浓度较高。在268 K时，在缓慢发育阶段，粘结剂的冻结速率远快于粘结剂的迁移速率，显著影响了粘结剂的迁移行为和粘结剂桥网结构。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Particuology 工程技术-材料科学：综合

CiteScore

6.70

自引率

2.90%

发文量

1730

审稿时长

32 days

期刊介绍： The word ‘particuology’ was coined to parallel the discipline for the science and technology of particles. Particuology is an interdisciplinary journal that publishes frontier research articles and critical reviews on the discovery, formulation and engineering of particulate materials, processes and systems. It especially welcomes contributions utilising advanced theoretical, modelling and measurement methods to enable the discovery and creation of new particulate materials, and the manufacturing of functional particulate-based products, such as sensors. Papers are handled by Thematic Editors who oversee contributions from specific subject fields. These fields are classified into: Particle Synthesis and Modification; Particle Characterization and Measurement; Granular Systems and Bulk Solids Technology; Fluidization and Particle-Fluid Systems; Aerosols; and Applications of Particle Technology. Key topics concerning the creation and processing of particulates include: -Modelling and simulation of particle formation, collective behaviour of particles and systems for particle production over a broad spectrum of length scales -Mining of experimental data for particle synthesis and surface properties to facilitate the creation of new materials and processes -Particle design and preparation including controlled response and sensing functionalities in formation, delivery systems and biological systems, etc. -Experimental and computational methods for visualization and analysis of particulate system. These topics are broadly relevant to the production of materials, pharmaceuticals and food, and to the conversion of energy resources to fuels and protection of the environment.