气体反压化学发泡注塑产品泡孔结构形成与演变过程的实验研究  

Experimental investigation of the formation and evolution processes of cell structure in gas counter pressure assisted chemical foaming injection molded parts

作　　者：李帅 徐一涵 孙雪梅 麻晓飞 孙成通 卢世伟 李洋 LI Shuai;XU Yi-han;SUN Xue-mei;MA Xiao-fei;SUN Cheng-tong;LU Shi-wei;LI Yang(School of Mechanical&Vehicle Engineering,Linyi University,Linyi 276005,China;Qingdao Hisense Mould Co.,Ltd.,Qingdao 266114,China)

机构地区：[1]临沂大学机械与车辆工程学院,山东临沂276005 [2]青岛海信模具有限公司,山东青岛266114

出　　处：《山东科学》2020年第2期33-39,共7页Shandong Science

基　　金：山东省重点研发计划重大科技创新工程(2019TSLH0102);国家级大学生创新创业训练计划(201910452016);临沂大学博士基金(40617014)。

摘　　要：以标准拉伸样条为研究对象,系统探讨了气体反压工艺中反压压力和作用时间对化学发泡注塑成型过程中熔体发泡行为的影响。根据实验获得的结果,提出了前沿泡孔不破裂的临界反压压力、熔体不发泡的临界反压压力和二次发泡卸压时间,并揭示了气体反压技术对化学发泡注塑过程中熔体发泡行为的影响机理。Using standard stretch spline as the research object,the influence of gas counter pressure(GCP)and GCP holding time on melt-foaming behavior in chemical foaming injection molding(CFIM)process was investigated.Based on the results obtained from the experiment,the critical GCP pressure under which melt flow front cell was not cracking,the critical GCP pressure under which melt was not foaming,and the pressure release time of melt second foaming were proposed.Finally,the influence mechanism of GCP technology on melt foaming action during CFIM process was revealed.

关 键 词：发泡注塑 气体反压技术 发泡行为 发泡机理 

分 类 号：TQ328.06[化学工程—合成树脂塑料工业]