聚醚醚酮(Polyetheretherketone, PEEK)具生物相容性，為醫療用之新興材料，其彈性模數與人體骨相近，能減少應力遮蔽效應，因此作為植入物上的研究。積層製造較傳統方式生產植入物的優勢為可精準的製作複雜結構、根據患者特異性進行客製化，改善因不匹配所造成的鬆脫，也可以降低成本。一般進行熔融沉積成型列印時，由於溫度的變化迅速，材料擠出與列印平台的垂直角度容易造成應力集中，使其破斷易有方向性，為改善此問題，進行此論文研究。 綜上所述，本研究基於熔融沉積成型技術(Fused Deposition Modeling, FDM)，設計了一組治具進行噴頭傾斜的實驗，探討將擠料與列印平台之間的夾角增大是否能降低應力集中的問題。本研究以田口方法進行列印參數分析，研究不同加工參數及噴頭傾斜角度與彈性模數及強度的關聯性，找出最佳機械性質的參數組合。並運用光學分析以了解試片的破斷面結構與列印參數之間的關係。 ;Polyetheretherketone (PEEK) has biocompatibility and it is a new material for medical use. Its elastic modulus is similar to human bone and can reduce the stress shielding effect. Therefore, it is used as a research on implants. The advantage of additive manufacturing over traditional implants is that it can accurately manufacture complex structures, customize them according to patient specificity, improve looseness caused by mismatches, and reduce costs. Generally, during fused deposition molding printing, due to rapid temperature changes, the vertical angle between the material extrusion and the printing platform is likely to cause stress concentration, which makes it easy to break and have directionality. The purpose of this paper is to improve this problem. In summary, this study is based on Fused Deposition Modeling (FDM), and designed a set of jigs for nozzle inclined printing experiments to explore whether increasing the angle between the extruded material and the printing platform can reduce the stress. In this study, Taguchi method was used to analyze the printing parameters, to study the correlation between different processing parameters and nozzle incline angles, elastic modulus and strength, and to find the best combination of parameters for mechanical properties. And use optical analysis to understand the relationship between the fracture surface structure of the test piece and the printing parameters.
