| 气辅挤出成型中挤出物直径的理论预测和实验研究 |
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| 引用本文： | 肖建华.气辅挤出成型中挤出物直径的理论预测和实验研究[J].工程塑料应用,2009,37(5). |
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| 作者姓名： | 肖建华 |
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| 作者单位： | 南昌航空大学材料科学与工程学院,南昌,330063 |
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| 基金项目： | 国家自然科学基金项目 |
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| 摘 要： | 应用Polyflow软件对粘弹性聚合物熔体在气辅挤出口模内的流动进行了研究，得到了挤出物直径的挤出胀大比方程。模拟结果表明，熔体在滑移段的平均停留时间与材料松弛时间之比同挤出胀大比之间存在指数衰减关系。通过HDPE的气辅挤出成型实验，发现不同螺杆转速及挤出温度下挤出物直径的实验值与计算值达到很好的吻合，该计算方法可用于指导气辅口模设计。
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| 关 键 词： | 气辅挤出 直径 挤出胀大比 滑移段 停留时间 |
THEORETIAL PREDICT AND EXPERIMENTAL RESEARCH OF PRODUCT DIAMETER IN GAS-ASSISTED EXTRUSION |
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| Xiao Jianhua.THEORETIAL PREDICT AND EXPERIMENTAL RESEARCH OF PRODUCT DIAMETER IN GAS-ASSISTED EXTRUSION[J].Engineering Plastics Application,2009,37(5). |
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| Authors: | Xiao Jianhua |
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| Affiliation: | School of Material Science and Engineering;Nanchang Hangkong University;Nanchang 330063;China |
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| Abstract: | The flow of the viscoelastic polymer melt in gas-assisted extrusion die was investigated by using Polyflow software,and the equation to propose the extrusive swell ratio of product diameter was obtained. The simulation results showed that the relation of the ratio of the average residence time that polymer melt settled in the slippage stage to material relaxation time with the extrusive swell ratio was decayed exponentially. By the experiment of gas-assisted extrusion HDPE,the experimental diameter agreed w... |
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| Keywords: | gas-assisted extrusion diameter extrusive swell ratio slippage stage residence time |
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