| 气动脱模用多孔材料的气体流动性能 |
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| 引用本文： | 蒋炳炎,邱庆军,翟瞻宇,申瑞霞. 气动脱模用多孔材料的气体流动性能[J]. 中南大学学报(自然科学版), 2011, 0(9) |
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| 作者姓名： | 蒋炳炎 邱庆军 翟瞻宇 申瑞霞 |
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| 作者单位： | 中南大学机电工程学院高性能复杂制造国家重点实验室; |
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| 基金项目： | 国家高技术研究发展计划(“863”计划)项目(2007AA04Z351) |
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| 摘 要： | 为了克服常规脱模方式下注塑件易出现表面质量低、翘曲等缺陷,提出利用透气钢实现注塑件脱模的新方法。该方法将透气钢作为气动脱模介质,使气体通过其微孔直接到达制品的底部,由于气体的等压性,可确保脱模时注塑件受到均匀的顶出力,不发生传统脱模机构中引起的翘曲变形现象。为了确定脱模过程中透气钢的工作参数,采用定压差测流量的方法实验研究考虑气体可压缩性时透气钢的透过性能。研究结果表明:随着压力的增大,气体在透气钢中将发生从Darcy流动到非Darcy流动的转变,分别对这2种流动状态的透过系数和惯性系数进行分析计算,得出了这两种状态的流动方程,揭示该流体流动状态下透气钢中气体的流动规律,为这种新脱模方法的使用提供数据和理论支持。
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| 关 键 词： | 微注射成型 气动脱模系统 透气钢 透过性能 |
Air flow properties of porous material for pneumatic demolding system |
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| JIANG Bing-yan,QIU Qing-jun,ZHAI Zhan-yu,SHEN Rui-xia. Air flow properties of porous material for pneumatic demolding system[J]. Journal of Central South University:Science and Technology, 2011, 0(9) |
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| Authors: | JIANG Bing-yan QIU Qing-jun ZHAI Zhan-yu SHEN Rui-xia |
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| Affiliation: | JIANG Bing-yan,QIU Qing-jun,ZHAI Zhan-yu,SHEN Rui-xia (State Key Laboratory for High Performance and Complex Manufacturing,School of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China) |
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| Abstract: | An innovative permeable steel based demolding method was proposed in order to reduce demolding-caused defects in conventional injection molding.The proposed method utilized permeable steel,which allowed air to pass through its micro-pores and exerted an evenly distributed demolding force on the bottom of molded part,thus ensuring elimination of part warpage in conventional demolding mechanism.Working parameters of permeable steel were determined by experimental study of its permeability in which air flow wa... |
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| Keywords: | micro-injection molding pneumatic demolding system permeable steel permeability |
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