| 聚合物熔体流变性能对气辅注塑工艺的影响 |
| |
| 引用本文： | 屈小中,梁瑞凤,王东燕.聚合物熔体流变性能对气辅注塑工艺的影响[J].中国塑料,1999(4). |
| |
| 作者姓名： | 屈小中 梁瑞凤 王东燕 |
| |
| 作者单位： | 中国科学院化学研究所工程塑料国家重点实验室 |
| |
| 摘 要： | 应用ＨｅｌｅＳｈａｗ物理模型和改进的Ｃｒｏｓ流变模型及有限元算法对５种聚丙烯的气辅注塑过程进行模拟，研究不同聚丙烯材料在充模速度相同的条件下的压力及锁模力变化规律。结果表明，气辅注塑在气体注射后与传统注塑有较大差异，所需压力、锁模力均比传统注塑有显著降低，且聚合物的熔体流动速率越小，气体注射后产生的压力降越大，表明在生产中应尽可能选用高熔体流动速率树脂以利于气辅注塑工艺。
|
| 关 键 词： | 气辅注塑 计算机仿真 流变性能 聚丙烯 |
Effect of Rheological Properties of Polymer Melt on Gasassisted Injection Molding |
| |
| Qu
Xiaozhong,Liang Ruifeng and Wang Dongyan.Effect of Rheological Properties of Polymer Melt on Gasassisted Injection Molding[J].China Plastics,1999(4). |
| |
| Authors: | Qu
Xiaozhong Liang Ruifeng and Wang Dongyan |
| |
| Abstract: | Effect of rheological properties of polymer melt on gasassisted injection molding has been
studied by means of computer simulation based on HeleShaw flow model and modified Cross
viscosity equation.The entrance pressures and clamp forces of five grades of polypropylene
are discussed for conventional and gasassisted injection molding processes at the same mold
filling rates. The result shows that a gasassisted process requires much lower entrance
pressure and clamp force than that of a conventional injection process.The pressure difference
after gas injection decreases with the polymer melt flow rate(MFR),the lower the MFR,the larger
the pressure drop.Polymers with higher MFR will be favorable to gasassisted injection molding. |
| |
| Keywords: | Gasassisted injection molding Computer simulation Rheological properties Polypropylene |
| 本文献已被 CNKI 等数据库收录！ |
