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Injection solid freeforming of polymer and ceramic composite materials.

机译:聚合物和陶瓷复合材料的注射固相成型。

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Solid freeform fabrication processes (SFF) have been the subject of much research and discussion within recent years. Unlike other near net shape manufacturing processes (i.e. conventional injection molding, casting, or bulk machining), SFF techniques fabricate parts "from the ground up" by the sequential deposition and curing of raw material slurry layers upon each other until the final part results. Precise spatial control of deposited layers is achieved through CAD software and hardware interfaced with the SFF apparatus.; The development of suitable SFF compatible raw material formulations and appropriate processing parameters are discussed in this dissertation. In particular, a wide range of materials have been fabricated and characterized at AML and ACR using this technique including alumina., crosslinked acrylate, and high molecular weight Nylon 6 thermoplastics. Comparisons are made between the mechanical properties of the SFF and corresponding commercial conventionally processed materials. Finally, the heat transfer and polymerization kinetics associated with three model SFF resin formulations are discussed and compared to corresponding empirical SFF process observations.
机译:近年来,固体自由形式制造工艺(SFF)成为许多研究和讨论的主题。与其他接近最终形状的制造工艺(即常规的注塑成型,铸造或批量加工)不同,SFF技术是通过依次将原材料浆料层相互沉积和固化直到最终零件的最终制造,“从零开始”制造零件。通过与SFF设备连接的CAD软件和硬件,可以实现对沉积层的精确空间控制。本文讨论了适合SFF的原料配方和合适的工艺参数的发展。特别是,使用这种技术已经制造了多种材料,并在AML和ACR上进行了表征,包括氧化铝,交联丙烯酸酯和高分子量尼龙6热塑性塑料。在SFF的机械性能和相应的商业常规加工材料之间进行比较。最后,讨论了与三种模型SFF树脂配方相关的传热和聚合动力学,并将其与相应的经验SFF工艺观察结果进行了比较。

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