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在数字光处理中增加可打印固体负载,使用双模态粒子大小分布.

Antoine P Delarue1, Ian M McAninch2, Amy M Peterson3

  • 1Department of Mechanical Engineering, University of Massachusetts Lowell, Lowell, Massachusetts, USA.

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概括
此摘要是机器生成的。

数字光处理 (DLP) 增材制造现在可以使用双模粒子大小分布实现更高的填充物含量. 这使得高分辨率复合结构的打印能够使用高达70%体积%的填充剂.

关键词:
这是一种双模式的双模式.数字光处理是数字光处理.填充剂 填充剂 填充剂 填充剂高度填充的高度填充的填充.颗粒大小分布 粒子大小分布

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科学领域:

  • 增材制造 增材制造 增材制造
  • 材料科学 材料科学 材料科学
  • 聚合物化学 聚合物化学

背景情况:

  • 数字光处理 (DLP) 是复合结构的热门增材制造技术.
  • DLP树脂中的高填充剂含量增加了粘度,限制了应用.
  • 最大限度地提高填料含量对于先进的复合材料性能至关重要.

研究的目的:

  • 为了研究高填充剂含量DLP树脂的双模粒子大小分布.
  • 为了确定颗粒分布对树脂粘度和打印能力的影响.
  • 为了评估高度填充的DLP打印零件的可实现分辨率.

主要方法:

  • 用不同的单模和双模填充剂负载 (5072体积%) 配制光敏树脂.
  • 使用旋转类风湿测量来测量粘弹性质的风湿学分析.
  • 克里格-达赫蒂模型适合确定粒子包装分数.
  • 精细特征的印刷零件的制造和分辨率测试.
  • 热重力测量分析,以评估在打印过程中填充剂内容的稳定性.

主要成果:

  • 双模态颗粒大小分布使得使用高达70%体积%的填充剂打印树脂成为可能.
  • 使用克里格-多赫蒂方程建模零剪切粘度,得到76.3%的密集随机密封分数.
  • 打印了高分辨率的部件,其特征小于380μm (正) 和860μm (负) 在70vol%的负载下.
  • 在印刷过程中,填充剂含量保持稳定,最终层的固体仅减少了2%体积.

结论:

  • 双模态颗粒大小分布显著提高了DLP树脂的填充剂负载能力.
  • 这种方法克服了粘度限制,通过DLP实现了高性能复合材料制造.
  • 该研究表明,印刷复杂的,高分辨率的零件的可行性,填充剂含量大幅增加.