Laser polishing of thermoplastics fabricated using fused deposition modelling
Laser polishing of thermoplastics fabricated using fused deposition modelling
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DOI：
10.1007/s00170-018-1901-5
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发表时间：
2018-06-01
影响因子：
3.4
通讯作者：
Smith, Paul N.
中科院分区：
文献类型：
--
作者：
Chai, Yuan;Li, Rachel W.;Smith, Paul N.
熔融沉积成型（FDM）是一种增材制造（AM）技术，能够快速构建塑料原型。AM技术已被用于骨科和创伤学，以制造患者特定的模型，手术导向器和植入物。然而，通过FDM的分层堆积通常产生有害的粗糙表面，这限制了其应用于诸如手术引导件和手术操作引导件的物品，因为这些物品需要高分辨率的表面质量。激光抛光的进步为FDM构造的患者特定导向器和植入物提供了具有成本效益的快速制造解决方案。本研究探讨应用潜力，使用非接触式激光扫描，以提高表面质量的FDM制造的热塑性塑料。结果表明，当激光功率为3 W，扫描速度为150 mm/s，扫描延迟为30 ms，线间距为0.025 mm时，表面粗糙度最大降低68%。激光抛光适合于聚乳酸（PLA）的表面处理。这项研究提供的数据支持一种新的方法来制造AM制造的热塑性塑料，利用激光扫描技术，以提高表面质量。
Fused deposition modelling (FDM) is a technique of additive manufacturing (AM) which is capable of fast construction of plastic prototypes. AM technology has been utilised in orthopaedics and traumatology to fabricate patient-specific models, surgical guides, and implants. However, the layering build-up by FDM usually generates a deleterious rough surface that limits its application to items such as surgical guide and surgical operating guide, because these items require a highly resolved surface quality. The advancement of laser polishing has been offering a cost-effective and fast manufacturing solution for FDM-constructed patient-specific guides and implants. This investigation explores application potential using a contactless laser scanning to improve the surface quality of FDM-fabricated thermoplastics. The results show that a maximum [68%] reduction in surface roughness was achieved at 3 W CO2 laser power, 150 mm/s scan speed, 30 ms scan delay and 0.025 mm line gap. Laser polishing is suitable to treat the surface of polylactic acid (PLA). This study provides data which supports a new approach to the manufacture of AM-fabricated thermoplastics utilising a laser scanning technique to improve the surface quality.