通过动态同轴挤出开发多种材料的化沉积建模 (FD3M)
Robert G Lahaie1, Christopher J Hansen1, David O Kazmer2
1Department of Mechanical Engineering, University of Massachusetts Lowell, Lowell, Massachusetts, USA.
3D printing and additive manufacturing
|May 1, 2024
概括
本研究介绍了定制聚合物复合材料的动态共挤出3D打印方法. 它通过使用聚碳酸 (PC) 芯显著提高了烯二乙烯 (ABS) 部件的尺寸稳定性.
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
- 聚合物科学 聚合物科学
背景情况:
- 多材料增材制造 (AM) 通常涉及连续的材料沉积,限制复杂的复合结构.
- 实现定制的聚合物复合材料需要在打印过程中对材料比率进行动态控制.
研究的目的:
- 开发和完善动态材料共挤压工艺,用于AM,能够打印两个输入材料之间的任何比率.
- 为了解决金属元件的小型内部流通道印刷的制造限制.
- 为了研究共挤压在化过程中对乙烯 (ABS) 的尺寸稳定性的影响.
主要方法:
- 通过3个热端代和14个设计代,动态材料联合挤出过程的演变.
- 设计修改以克服印刷小型内部流通道 (直径2毫米,长50毫米) 的挑战.
- 将ABS与聚碳酸 (PC) 芯联合挤出,以评估尺寸稳定性的改进.
主要成果:
- 第三代设计将材料过渡时间缩短了92%.
- 同挤出显著降低了回火后零件收缩的标准偏差,从纯ABS的7.08%降至ABS/PC组件的0.24%.
- 该工艺可以打印定制的聚合物复合材料,具有可变材料比率.
结论:
- 开发的动态联合挤压工艺扩大了多材料增材制造的能力.
- 与PC核心共同挤压ABS显著提高了尺寸稳定性,减少了加工后的收缩.
- 这项技术有助于创建先进的聚合物复合材料,这些复合材料具有针对不同应用的定制性质.
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