EPDM包覆层注射成型模拟及工艺参数研究  

Research on Injection Molding Simulation and Process Parameters of EPDM Coating

作　　者：刘奔奔 张慧[3] 李军强[4] 陈国辉[4] 杨士山[4] 彭炯 何吉宇[1,2] 李向梅 杨荣杰[1,2] LIU Ben-ben;ZHANG Hui;LI Jun-qiang;CHEN Guo-hui;YANG Shi-shan;PENG Jiong;HE Ji-yu;LI Xiang-mei;YANG Rong-jie(School of Material Science and Engineering,Beijing Institute of Technology,Beijing 100081,China;National Engineering Research Center of Flame Retardant Material,Beijing 100081,China;Beijing Institute of Aerospace Experiment Technology,Beijing 100074,China;Xi′an Modern Chemistry Research Institute,Xi′an 710065,China;School of Chemistry and Chemical Engineering,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学材料学院,北京100081 [2]国家阻燃材料工程技术研究中心,北京100081 [3]北京航天试验技术研究所,北京100074 [4]西安近代化学研究所,陕西西安710065 [5]北京理工大学化学与化工学院,北京100081

出　　处：《火炸药学报》2022年第1期103-108,共6页Chinese Journal of Explosives & Propellants

基　　金：基础产品创新计划。

摘　　要：为了提高三元乙丙橡胶(EPDM)包覆层注射成型工艺的研发效率,通过数值模拟和实验验证相结合的方式研究了EPDM的流动规律并优选出合适的工艺参数。采用Carreau模型拟合EPDM的流变特性方程,使用Moldflow软件模拟EPDM包覆层的注射成型过程;模拟过程选择了合适的浇口位置,预测了气穴、熔接线位置以及前沿温度的变化,结果与实验一致,气穴易于在弧形顶部形成,同时选择侧面对称的双注射口更有助于成型;分析了温度、压力以及流动速率对填充过程的影响,得到初步的预测成型参数。基于此,进一步通过实验验证得到了合格产品的工艺参数。使用拉伸实验研究所选范围的压力和注射速率对包覆层制品质量的影响,结果表明,合适的工艺参数为:注压温度170℃,镀铬模具温度170℃,注压最大压力30MPa,注压量为148cm^(3),注压速率为12mm/s。In order to improve the development efficiency of ethylene propylene diene monomer(EPDM)rubber coating injection molding process,the flow law of EPDM was studied by combination of numerical simulation and experimental verification and appropriate process parameters were optimized.The rheological properties of EPDM were modeled using the Carreau mode,which was introduced into Moldflow software to simulate the injection molding process of EPDM coating.The simulation obtains the appropriate gate position,and predicts the air pocket,weld line position and the change of front temperature,which is consistent with the experiment.Airhole are easy to form at the top of the arc,and the choice of side-symmetrical double injection ports is more conducive to molding.The influence of temperature,pressure and flow rate on the filling process was analyzed,and preliminary prediction molding parameters were obtained.On the basis of the fitting results,the process parameters of qualified products were further verified by experiments.The influence of the selected pressure and injection rate on the quality of coated products was studied by tensile test.The results show that the appropriate process parameters are as follows:injection temperature 170℃,chrome-plating mold temperature 170℃,maximum injection pressure 30MPa,injection volume 148cm^(3),and injection rate 12mm/s.

关 键 词：应用化学 三元乙丙橡胶 EPDM包覆层 流变方程 成型模拟 工艺参数 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O69[理学—化学]