料筒温度对超声塑化微制件充填质量的影响  

Effect of barrel temperature on filling quality of ultrasonic plasticized micro-parts

作　　者：蒋炳炎[1] 张英平 齐鹏程[1] 邹洋[1] 魏国猛 吴旺青[1] JIANG Bingyan;ZHANG Yingping;QI Pengcheng;ZOU Yang;WEI Guomeng;WU Wangqing(State Key Laboratory of High Performance Complex Manufacturing,Central South University,Changsha 410083,China)

机构地区：[1]中南大学高性能复杂制造国家重点实验室

出　　处：《中南大学学报（自然科学版）》2019年第12期2969-2977,共9页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51575540,51875582)::中央高校基本科研业务费专项资金资助项目(2018zzts458)~~

摘　　要：为研究料筒温度对超声塑化微制件充填质量的影响,采用瞬态热分析法研究不同料筒温度下超声塑化过程聚甲基丙烯酸甲酯(PMMA)温度场升温特性,并结合单因素实验法研究料筒温度对超声塑化微拉伸试验件充填率、充填长度、溢料现象的影响规律。研究结果表明:提高料筒温度可明显缩短聚合物达到黏流温度所需的时间,提高聚合物熔体的最高温度,从而提高超声塑化微制件充填质量;当料筒温度为100℃时,聚合物颗粒完全熔融,制件充填率提高12.20%,制件长度提高16.00%,无明显烧焦及溢料现象;当料筒温度提高至180℃时,充填质量出现小幅度下降,制件出现烧黑与溢料现象。To study the effect of barrel temperature on the filling quality of ultrasonic plasticized micro-parts,the transient thermal analysis method was used to study the heating characteristics of the temperature field of polymethyl methacrylate(PMMA)in ultrasonic plasticizing process at different barrel temperatures.The single-factor experiment was conducted to research the influence of barrel temperature on ultrasonic plasticized micro-parts.The results show that time required for the polymer to reach the viscous flow temperature is shortened,and the maximum temperature of the polymer melt increases with the increase of barrel temperature,thereby the filling quality of the ultrasonic plasticized micro-parts is improved.When the barrel temperature is 100℃,the polymer particles are completely melted,the filling rate of the micro-part is increased by 12.20%,the length of the part is increased by 16.00%,and no charring and flashing phenomenon is observed.When the temperature of the barrel reaches 180℃,the filling quality has a slight decline with the appearance of blackening and flashing.

关 键 词：超声塑化 料筒温度 微注射成型 充填质量 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业]