Zentgraf Jan, Nützel Florian, Mühlbauer Nico, Schultheiss Ulrich, Grad Marius, Schratzenstaller Thomas
Laboratory for Medical Devices, Department of Mechanical Engineering, University of Applied Sciences Regensburg, 93053 Regensburg, Germany.
Regensburg Center of Health Sciences and Technology (RCHST), University of Applied Sciences Regensburg, 93053 Regensburg, Germany.
Polymers (Basel). 2024 Aug 20;16(16):2348. doi: 10.3390/polym16162348.
Polyetheretherketone is a promising material for implants due to its good mechanical properties and excellent biocompatibility. Its accessibility to a wide range of applications is facilitated by the ability to process it with an easy-to-use manufacturing process such as fused filament fabrication. The elimination of disadvantages associated with the manufacturing process, such as a poor surface quality, is a main challenge to deal with. As part of the mass finishing process, centrifugal disc finishing has demonstrated good results in surface optimization, making it a promising candidate for the post-processing of additively manufactured parts. The objective of this study is to identify the key parameters of the centrifugal disc finishing process on the waviness of additively manufactured PEEK specimens, which has not been investigated previously. The waviness of the specimen was investigated by means of confocal laser scanning microscopy (CLSM), while weight loss was additionally tracked. Six parameters were investigated: type, amount and speed of media, use of compound, amount of water and time. Type of media, time and speed were found to significantly influence waviness reduction and weight loss. Surface electron microscopy images demonstrated the additional effects of deburring and corner rounding. Results on previous studies with specimens made of metal showed similar results. Further investigation is required to optimize waviness reduction and polish parts in a second post-processing step.
聚醚醚酮因其良好的机械性能和出色的生物相容性，是一种很有前景的植入材料。它能够通过诸如熔融长丝制造等易于使用的制造工艺进行加工，这有助于其广泛应用。消除与制造工艺相关的缺点，如表面质量差，是需要应对的主要挑战。作为批量光整加工工艺的一部分，离心盘光整加工在表面优化方面已显示出良好效果，使其成为增材制造零件后处理的一个有前途的选择。本研究的目的是确定离心盘光整加工工艺对增材制造的聚醚醚酮试样波纹度的关键参数，此前尚未对此进行过研究。通过共聚焦激光扫描显微镜（CLSM）研究试样的波纹度，同时额外跟踪重量损失。研究了六个参数：介质的类型、数量和速度、化合物的使用、水的数量和时间。发现介质类型、时间和速度对减少波纹度和重量损失有显著影响。表面电子显微镜图像显示了去毛刺和倒圆角的额外效果。先前对金属制成的试样的研究结果显示了类似的结果。需要进一步研究以在第二个后处理步骤中优化减少波纹度和抛光零件。
