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Filling Imbalance of Elastomer TPVs in Injection Mold with Unary Branch Type Runner System  

Han, Dong-Yeop (부경대학교 기계공학부 대학원)
Jeong, Yeong-Deug (부경대학교 기계공학부)
Publication Information
Journal of the Korean Society for Precision Engineering / v.25, no.4, 2008 , pp. 47-52 More about this Journal
Abstract
Recently, the study for filling imbalance in thermoplastic polymer has gradually been increased. However, it is hard to find the researches for filling imbalance of thermoplastic elastomer(TPE). The experiment of filling imbalance was conducted for the three kinds of thermoplastic vulcanizes(TPVs) and PP polymer in the mold with geometrically balanced runner system(Unary Branch Type Runner System). In this experiment, the effects of the melt temperature, injection pressure and injection speed on the filling imbalance were investigated. There was also the imbalance in TPV injection molding process as well as in conventional injection molding with plastics. The tendency of filling imbalance in TPV injection molding specially decreased by taking place the hesitation of TPV melt.
Keywords
Filling imbalance; Thermoplastic Elastomers; TPV; Shear thinning; Frozen layer; Hesitation;
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