Abstract

In injection molding process, cooling system is considered as the most significant phase among filling and ejection phase as it affects both productivity and part quality. These can be achieved by uniform distribution of temperature on molded parts from the core and cavity of mold. In this study, three different designs of cooling channel were developed to be employed in hollow plastic part. Computer-aided engineering software was used to assess the efficient of the three different cooling systems which are conventional, baffle, and bubbler cooling channel. The results from the simulated part revealed that the baffle and bubbler cooling system supplied more uniform temperature distribution as compared to conventional system. Thus, it leads to the reduction in percentage of shrinkage that causes to warpage to the part. The range of cooling temperature for both systems is 85–98 °C and 114–193 °C for the latter.