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针对提出的利用光固化3D打印制造注塑模具
通过注塑工艺获得个体化聚醚醚酮(PEEK)植入物的方案
采用3种树脂材料光固化制造注塑模芯
评估了树脂模芯在极端注塑条件下的保形能力
测试分析了3D打印及注塑工艺中标准样件的尺寸误差
通过具有典型复杂结构的个体化PEEK下颌骨关节窝植入物对制造过程中的形状误差进行了测定和分析。结果表明:光固化3D打印树脂模芯在极端注塑条件下仍具有良好的保形能力
完全可以注塑高熔点PEEK植入物;个体化PEEK植入物的制造误差主要来源于模芯的制造误差和注塑过程中模芯热胀冷缩产生的形变误差;复杂结构PEEK植入物(下颌骨关节窝)正、负3D偏差的平均值为0.127 mm和-0.387 mm
以负误差为主
通过误差补偿可完全满足医用个体化植入物的精度要求。
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