Shandong Science ›› 2020, Vol. 33 ›› Issue (2): 33-39.doi: 10.3976/j.issn.1002-4026.2020.02.006

• New Materials • Previous Articles     Next Articles

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

LI Shuai 1, XU Yi-han1,SUN Xue-mei 1, MA Xiao-fei 1*, SUN Cheng-tong 1, LU Shi-wei 1, LI Yang 2   

  1. 1. School of Mechanical &Vehicle Engineering, Linyi University, Linyi 276005, China; 2. Qingdao Hisense Mould Co., Ltd., Qingdao 266114, China
  • Received:2019-10-24 Online:2020-04-20 Published:2020-03-30

Abstract: 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.

Key words: foaming injection molding, gas counter pressure technology, foaming action, foaming mechanism

CLC Number: 

  • TQ328.06