材料挤出工艺参数对附加制造的泡和非泡聚乳酸结构的压缩性能的影响
Armin Yousefi Kanani1,2, Andrew Kennedy2
1Mechanical Engineering Group, School of Engineering, University of Kent, Canterbury, United Kingdom.
3D printing and additive manufacturing
|February 23, 2024
概括
可泡的多乳酸丝可以通过增材制造来创建轻量级,吸收能量的结构. 调整挤出参数和灌装密度可以优化尺寸精度,并为三明治结构提供低密度核心.
科学领域:
- 材料科学 材料科学 材料科学
- 添加剂制造 添加剂制造 添加剂制造
- 聚合物工程 聚合物工程
背景情况:
- 轻量结构对于各种应用中的能量吸收至关重要.
- 增材制造为创建复杂几何形状提供了新的方法.
- 可泡聚合物为增强材料性能提供了机会.
研究的目的:
- 为了评估可泡的聚乳酸 (PLA) 丝,用于轻质,能吸收结构.
- 为了优化挤出参数以获得尺寸精度和泡膨胀.
- 为了比较泡结构的机械性能与使用充填结构的机械性能.
主要方法:
- 使用材料挤出,挤出商业可泡的PLA丝.
- 制造部分的压缩测试.
- 对机械反应的孔隙性影响 (发泡与充填) 的分析.
- 研究挤出喷嘴温度和材料流速的影响.
主要成果:
- 在220°C的喷嘴温度下实现的最大泡膨胀.
- 减少挤出倍数或充填密度可以提高尺寸精度.
- 机械反应遵循固体分数的功率定律函数,不论孔径类型.
- 单独泡没有机械效益,但对于特定的孔隙性要求是有用的.
结论:
- 可泡的丝材适用于创建硬,轻质的结构,可控制透度.
- 将泡与充填相结合,可以生产三明治结构的低密度核心.
- 使用可泡PLA的增材制造为新的轻质结构设计提供了一条途径.
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