工艺与制造英文2023被引 8
多腔体几何结构密闭注射拉挤成型工艺中压力发展的实验与仿真分析
Experimental and Simulative Analysis of the Pressure Development in a Closed Injection Pultrusion Process with Multiple Chamber Geometries
Sebastian Strauss, Frederik Wilhelm, Andreas Senz, Herbert Engelen, Simon Boysen, Niko Rilli, Alptekin Celik, Marcel Ratka, Christian Bonten · Fraunhofer Institute for Casting, Composites and Processing, 86159 Augsburg, Germany
摘要整理
高反应性树脂体系因其锅期短的特点，使得传统开放式浸渍工艺（开浴法）需升级为密闭注射拉挤成型（CIP）工艺。本研究将开放式浴槽改进为密闭注射浸渍腔室（ii-腔室）。通过三阶段变化树脂粘度、注射口开口角和开口因子三个参数，进行拉挤成型试验，测量ii-腔室和拉挤模具内的工艺压力，实现对未固化复合材料工艺条件的直接反馈。基于达西定律建立仿真模型，并扩展该模型以考虑纤维运动，从而准确表征模具内的压力增长。灵活的ii-腔室和模具设计方案增进了对模具系统内部过程的理解。研究结果表明，在三个影响变量中，树脂粘度对压力发展的敏感性最大。沿拉挤模具系统长度方向，三个测量点的压力水平总体呈上升趋势。实验数据有效验证了新开发的仿真模型的准确性，为优化密闭注射拉挤工艺参数提供了理论依据。
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