气体膨胀成型法膨胀温度对微结构参数的影响  

Influence of Expansion Temperature on Microbubbles Parameters in Gas Expansion Molding

作　　者：李健[1,2] 王腊梅 居信 赵珂 金卫凤[3] LI Jian;WANG Lamei;JU Xin;ZHAO Ke;JIN Weifeng(School of Materials Science and Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China;Institute of Intelligent and Flexible Mechatronics,Jiangsu University,Zhenjiang,Jiangsu 212013,China;School of Mechanical Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China)

机构地区：[1]江苏大学,材料科学与工程学院,江苏镇江212013 [2]江苏大学,智能柔性机械电子研究院,江苏镇江212013 [3]江苏大学,机械工程学院,江苏镇江212013

出　　处：《塑料》2022年第4期1-5,11,共6页Plastics

基　　金：国家自然科学基金(51775248);江苏大学高级人才启动基金项目(自然类)(11JDG101)。

摘　　要：为研究气体膨胀成型法中,膨胀温度对微结构几何参数的影响,采用数值模拟方法分析了微气泡几何参数随膨胀温度的变化规律。结果表明,对于半径和深度分别为50和100μm的模板孔而言,膨胀温度50℃是其形成微气泡的临界温度;对于半径和深度分别为100和400μm的模板孔而言,在80~5000℃的范围内,微气泡直径仅从200μm增大至700μm,高度从100μm增大至700μm。这表明,气体膨胀成型法中微气泡的形成存在临界膨胀温度;当膨胀温度达到临界膨胀温度并且继续升高时,微气泡体积膨胀被分摊到直径方向和高度方向,因此,单纯调整膨胀温度难以实现微气泡参数的大范围调节。In order to explore the influence mechanism of expansion temperature on the shape of microbubbles in gas expansion molding,the variation of microbubble geometric parameters with its expansion temperature was investigated through numerical simulation.Results showed that for the template with micro holes with radius of 50μm and depth of 100μm,the expansion temperature of 50℃was the critical temperature for the formation of microbubbles.And for the template with micro holes with radius of 100μm and depth of 400μm,variation of expansion temperature from 80℃to 5000℃could only lead to an increase of the microbubbles diameter from 200μm to 700μm and of the microbubbles height from 100μm to 700μm.These results indicated that the formation of microbubbles in gas expansion molding needs an expansion temperature above the critical temperature.And above the critical expansion temperature,the volume expansion of microbubbles caused by the increase of expansion temperature was divided into the expansion in both diameter direction and height direction,thus it was difficult to adjust the microbubble parameters in a wide range by adjusting the expansion temperature alone.

关 键 词：气体膨胀成型法 数值模拟 微气泡 微凹腔 膨胀温度 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术] TQ324.21[自动化与计算机技术—计算机科学与技术]