纸浆模塑吸浆模具背腔气流均匀性的数值模拟  

Numerical Simulation of Airflow Uniformity in Pulp Molding Back Cavity

作　　者：廖泽顺 滑广军[1] 谢勇[1] 莫灿梁 费伟民[1] 

机构地区：[1]湖南工业大学包装新材料与技术重点实验室,湖南株洲412007 [2]东莞市汇林包装有限公司,广东东莞523520

出　　处：《包装学报》2016年第1期41-48,共8页Packaging Journal

基　　金：国家自然科学基金资助项目(61170101);湖南省重点研究发展计划基金资助项目(2015JC3114);湖南工业大学研究生创新基金资助项目(cx1501)

摘　　要：建立了模具背腔流场的CFD三维数值模型,并且对气流分布板不同的开孔率、不同布置位置进行了数值模拟分析。结果表明:模具背腔无气流分布板时,背腔出口截面的速度分布很不均匀,而添加了气流分布板后,背腔气流分布均匀性明显改善;随着开孔率由5%,15%,20%,25%依次增加,气流分布均匀性依次降低;随着气流分布板距背腔入口L由90,100,110,120,130,140 mm依次增加,背腔气流分布均匀性先增加后降低,在120 mm时其均匀性最好。在确定气流分布板的结构及位置的基础上,对背腔截面突变位置进一步优化,可减小气流的局部能量损失,优化后出口截面的气流平均速度较优化前提高了近11%,进一步提高了产品脱模效率。CFD three-dimensional numerical model of the cavity flow field of the mold was established, and the numerical simulation analysis was carried out on the different open hole ratios and different layout positions of the air distribution plate. The results show that the velocity distribution in outlet cross section of back cavity was very uneven without air distribution plate, while it was obviously improved after air distribution plate was added. With the opening rate increased from 5%, 10%, 15%, 20% to 25% sequentially, the airflow uniformity decreased accordingly. With the air distribution plate location from the entrance of mold back cavity L increased from 90, 100, 110, 120, 130, 140 mm in proper order, the airflow uniformity firstly increased but then decreased, and the airflow distribution is optimum when it was 120 mm. Based on the determination of the structure and position of the air distribution plate, the position of the back cavity is further optimized, and the local energy loss of the airflow could be reduced. The average velocity of the airflow in the outlet cross section is increased by nearly 11% with further improvement in the efficiency of product release.

关 键 词：纸浆模塑 模具背腔 气流分布板 数值模拟 

分 类 号：TB486.3[一般工业技术—包装工程]