Fiber Orientation in Injection Molding With Rotating Flow
Fiber Orientation in Injection Molding With Rotating Flow
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DOI：
10.1002/pen.20685
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发表时间：
2008-02
影响因子：
3.2
通讯作者：
Cristina A. Silva;J. Viana;F. V. Hattum;A. Cunha
中科院分区：
文献类型：
--
作者：
Cristina A. Silva;J. Viana;F. V. Hattum;A. Cunha
注射成型中纤维取向的发展是由一种特殊的成型工具RCEM模具操纵的，该工具在填充阶段施加一个型腔表面的旋转作用。以玻璃纤维增强聚丙烯为原料，以不同的模腔转速制备中心浇注圆盘模塑料，形成不同的纤维取向分布和取向水平。用光学显微镜和电子显微镜对铸件的形貌进行了表征。利用取向张量分析了纤维取向的厚度分布，建立了加工热机械环境与纤维取向之间的关系。在高转速下，纤维取向主要受旋转运动控制，纤维取向分布更加均匀，在周向有择优取向。波兰姆。英语。《科学》，2008。英国塑料工程师学会2007
The development of fiber orientation in injection molding was manipulated by a special molding tool, the RCEM mold, which imposes a rotation action by one of the cavity surfaces during the filling stage. Center-gated disc moldings were produced from glass fiber reinforced polypropylene with different cavity rotation velocities, inducing distinct distributions and levels of fiber orientation. The morphologies of the moldings were characterized by optical and electronic microscopy. The through-thickness profiles of fiber orientation were assessed by means of the orientation tensor, and the relationship between the processing thermo-mechanical environment and the fiber orientation was established. At high rotation velocities, the resulting fiber orientation pattern is mainly controlled by the rotational motion, inducing a much more homogeneous through-the-thickness fiber orientation distribution, with a preferential alignment on the circumferential direction. POLYM. ENG. SCI., 2008. © 2007 Society of Plastics Engineers