GOALI/IUCP: Novel Injection Molding Machine Design for Mixing and Compounding

9523044比吉奥这个学术与工业联系的机会项目将为设计创新的新型注塑机提供分析和建模支持。概念设计和理论分析表明，可以省去从几个原始均聚物原料到由混合聚合物制成的最终模制产品的步骤。目前的做法是使用挤出在中间步骤混合几种聚合物，挤出的混合物用作注塑机的原料。在这一中间步骤中经常会有浪费。所提出的方法将在注塑机上进行混合和混合，使用单级非啮合双螺杆注塑机。双螺杆是创新之处，因为当其中一个螺丝旋转时，它会相对于另一个轴向移动。这使得有可能关闭控制回路，以保持混合和成型输出。马里兰大学的工业合作伙伴恩格尔注塑机公司将设计和制造一台原型机器。将通过建模和实验来确定采用新的双螺杆设计的控制混合和成型的多变量问题的操作规程。使用这种新型机械概念的析因设计实验将被用来评估与聚丙烯和尼龙共混的玻璃纤维的功能性能。该项目的影响是省去了一个加工步骤和随之而来的回收流，并在成型机上实时控制混合原料和模压产品。有了更好的本地混合控制，更多的回收原料可以用于模塑产品。

9523044 Bigio This Grant Opportunity for Academic Liaison with Industry project will provide the analysis and modeling support to design an innovative new injection molding machine. Conceptual design and theoretical analysis indicate that it is possible to eliminate a step in going from several virgin homopolymer stock to a final molded product made from a blended polymer. The current practice is to use extrusion to blend several polymers in an intermediate step, and the extruded blend is used for feed stock for an injection molding machine. There is often waste at this intermediate step. The proposed approach will do the blending and mixing on the injection molding machine, using a single stage non-intermeshing twin screw injection molding machine. The twin screw is the innovation, because while one of the screws rotates, it moves axially relative to the other. This makes it possible to close the control loop to maintain both blend and molding outputs. A prototype machine will be designed and built by Engel Injection Molding Machine Company, the University of Maryland's industrial partner. Modeling and experimentation will be used to determine the operating protocol for the multivariate problem of controlling blending and molding with the new twin screw design. A factorial designed experiment using this novel machine concept will be used to evaluate the functional performance of glass fiber blended with polypropylene and nylon. The impact of this project is elimination of a processing step and the attendant recycle stream, and the real time control of the blended stock and the molded product at the molding machine. With better local blend control, more recycled stock can be used in molded products.