How to Optimize Pack & Hold Times for Hot-Runner & Valve-Gated Molds

摘要

In a majority of tools, molders use only one phase after the injection phase to pack and hold the plastic in the mold—the so-called hold phase. In reality, the molder must differentiate between the pack and the hold phases. For the sake of simplicity, in this article we'll refer to the second phase as the hold phase and cover the technique of optimization, and then further differentiate the two in the second part of this series in December.