脉动注射压力影响充模压力及充模时间的实验研究  

Experimental Research on Effect of Pulsatile Injection Pressure on Filling Cavity Pressure and Filling Time

作　　者：潘文喆 殷小春 姚化振 瞿金平 

机构地区：[1]华南理工大学聚合物成型加工工程教育部重点实验室,聚合物新型成型装备国家工程研究中心,广东广州510640

出　　处：《塑料工业》2005年第8期29-32,共4页China Plastics Industry

基　　金：国家自然科学基金面上项目(编号:10472034);重大项目(编号:10590351)

摘　　要：介绍了立式液压振动注射机的工作原理,并在该立式液压振动注射机上进行振动参数不同的注射成型实验,制取线型低密度聚乙烯(LLDPE)圆盘试样。同时利用自制的压力传感器及数据采集系统对模腔压力进行采集。实验结果表明,充模压力的波动频率与柱塞杆的振动频率相同;随着柱塞杆振幅的增大,充模压力的波动幅度增大;随着柱塞杆的振动频率、振幅的增大,平均充模压力也增大,充模时间减小。The working principle of a vertical dynamic vibration injection machine is presented. LLDPE discsamples were made by means of injection molding with pulsatile injection pressure of different pulsatile parameters. Meanwhile, by using a self-made pressure sensors, filling cavity pressure changes with real-time were gathered. The test results showed that, the vibration frequency of filling cavity pressure was equal to piston ring vibration frequency; the amplitude of filling cavity pressure increased with the increase of piston ring vibration amplitude; the average of filling cavity pressure increased and the filling time shortened with the increase of the piston ring vibration amplitude and/or frequency.

关 键 词：振动力场 充模压力 充模时间 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业]