| 注塑成形中气体反压技术的数值模拟 |
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| 引用本文： | 杨顺星,李海梅,张亚飞,李瑞波,亢战,彭响方.注塑成形中气体反压技术的数值模拟[J].计算机辅助工程,2015,24(6):47-51. |
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| 作者姓名： | 杨顺星 李海梅 张亚飞 李瑞波 亢战 彭响方 |
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| 作者单位： | 郑州大学 材料科学与工程学院;郑州大学 材料科学与工程学院;郑州大学 材料科学与工程学院;郑州大学 材料科学与工程学院;大连理工大学 工业装备结构分析国家重点实验室;华南理工大学 聚合物成形加工工程教育部重点实验室 |
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| 基金项目： | 国家自然科学基金（11372285）；工业装备结构分析国家重点实验室开放课题（GZ1203）；国家重点基础研究发展计划（“九七三”计划）（2012CB025903） |
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| 摘 要： | 针对某平板注塑成形过程，通过改变气体反压（Gas Counter Pressure，GCP）压力场，用ANSYS CFX模拟GCP技术对成形质量的影响.由模拟结果可知：在GCP压力作用下，熔体的流动形态发生明显变化.当GCP压力增大时，熔体的最大流动长度减少，且熔体流动速度和剪切应变速率呈下降的趋势.在充填时间内，GCP压力由0增加到2 MPa时，塑料熔体沿流动方向上的速度由0.52 m/s下降到0.45 m/s，熔体的最大剪切应变速率最大降低42.7%.
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| 关 键 词： | 注塑成形 气体反压 熔体 流动形态 剪切应变速率 |
| 收稿时间： | 2015/4/30 0:00:00 |
| 修稿时间： | 6/4/2015 12:00:00 AM |
Numerical simulation on gas counter pressure technology in injection molding |
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| YANG Shunxing,LI Haimei,ZHANG Yafei,LI Ruibo,KANG Zhan and PENG Xiangfang.Numerical simulation on gas counter pressure technology in injection molding[J].Computer Aided Engineering,2015,24(6):47-51. |
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| Authors: | YANG Shunxing LI Haimei ZHANG Yafei LI Ruibo KANG Zhan and PENG Xiangfang |
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| Affiliation: | School of Material Science and Technology, Zhengzhou University;School of Material Science and Technology, Zhengzhou University;School of Material Science and Technology, Zhengzhou University;School of Material Science and Technology, Zhengzhou University;State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology;Key Laboratory of Polymer Processing Engineering, Ministry of Education, South China University of Technology |
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| Abstract: | As to the injection molding process of a plate part, the effect of Gas Counter Pressure(GCP) technology on the molding quality is simulated in ANSYS CFX by changing GCP pressure field. The simulation results show that the melt flow is obviously changed by the effect of GCP pressure. When the GCP pressure increases, the maximum flow length, flow velocity and shear strain rate of the melt decreases. During the injection filling stage, when the GCP pressure increases from zero to 2 MPa, the velocity of the plastic melt along flow direction decreases from 0.52 m/s to 0.45 m/s and the maximum reduction of the maximum shear strain rate is 42.7%. |
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| Keywords: | injection molding gas counter pressure melt flow shear strain rate |
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