文章摘要
共注成形过程中聚合物流动特性的物理可视化试验
Physical Visualization of Polymer Flow Characteristics During Co-Injection Molding
  
DOI:10.16865/j.cnki.1000-7555.2018.08.017
中文关键词: 共注成形  注射成形  聚合物熔体  流动特性
英文关键词: co-injection molding  injection molding  polymer melt  flow characteristics
基金项目:国家自然科学基金资助项目(51475071)
作者单位
姜开宇, 鲁 勇, 杨 磊, 王龙飞 大连理工大学 模塑制品教育部工程研究中心, 辽宁 大连 116024 
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中文摘要:
      目前对于聚合物制品共注成形工艺过程中熔体流动特性的理论研究还缺乏直接可靠的试验依据。针对这一现状,文中通过自行开发的可视化试验装置及高速摄像机直接观测共注成形时聚合物熔体流动过程,并与相同成形参数下聚合物在相同尺寸结构的金属型腔内的流动过程进行对比,对其流动特性进行分析。研究结果表明,共注成形的熔体充型流动过程会显示出与常规注射成形不同的特征。熔体的温度是影响共注塑成形特性的主要因素,不同温度的熔体在不同的注射速率下也会呈现出不同的成形特性。
英文摘要:
      Due to the lack of experimental methods, there is little direct and reliable experimental basis for the theoretical study of melt flow characteristics in the process of co-injection molding. In this study, filling processes of PP melt of co-injection molding were directly observed by self-developed visual experimental device. In order to analyze the filling characteristics, results of the co-injection molding were compared with that of injection molding process in metal cavity with the same structure and molding parameters. The results show that the flow pattern of melt filling in co-injection molding can be different from that of conventional injection molding. The melt temperature is the main factor that affects the characteristics of co-injection molding, and the different temperature of the melt will show different forming characteristics at different injection rates.
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