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关于3D打印树脂砂芯在造过程中释放的气体的研究

Xiaolong Wang¹, Qihua Wu², Yuhang Huang³

¹School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China.

Materials (Basel, Switzerland)

|June 10, 2023

概括

砂芯释放的气体显著导致了砂中的气体孔隙缺陷. 这项研究研究了实际造条件下的气体释放,揭示了初始高气体生成率和空心和密心核心打印之间的差异.

科学领域:

材料科学与工程材料科学与工程
制造过程制造过程制造过程
造技术造技术造技术

背景情况:

气体多孔性是砂造的关键缺陷,通常与砂芯释放的气体有关.
现有的沙芯气体释放研究在模拟实际造条件方面存在局限性.
了解粘合剂燃烧和气体生成对于减轻气体多孔性至关重要.

研究的目的:

在模拟的实际造条件下,研究3D打印的树脂石英砂芯的气体释放行为.
分析核心打印设计 (空洞与密集) 对气体产生和排放的影响.
评估空气暴露对粘合剂燃烧和随后的气体产生的影响.

主要方法:

在件中设计和封闭的砂芯,将核心打印延伸到模具表面.
用空心和密集核心打印设计进行比较分析.
安装了压力和空气流速传感器,用于监控粘合剂燃烧期间释放的气体.

主要成果:

在粘合剂燃烧过程中观察到高初始气体生成率和快速压力峰值.
空心打印显示压力峰值为1.09 kPa,排气速度峰值为1.89 m/s.
密集核心打印显示排气速度为1m/s500s;空气不足导致粘合剂燃烧不完整,气体产生增加 (在绝缘时增加30.7%).

结论:

核心打印的设计显著影响砂造过程中气体释放动态.
充分的空气暴露对于完整的结合剂燃烧至关重要,减少了气体生成和潜在的缺陷.
这项研究提供了通过优化沙芯设计和通风来控制气体多孔性的见解.

关键词:

通过3D打印打印3D打印.黄树脂是一种 furan 树脂.气体排放气体的压力.沙子核心的加气化沙子核心的气化

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