Checking the resin flow
You must try and deal with the best possible Hot Runner, where the supplier can help you with a flow analysis and design capabilities related with channel sizing. This is surely going to offer you with mechanical and thermal balance, when the main area of concern is associated with hot running segment. Here, the systems are going to be large enough in order to give a small pressure drop throughout the system without even causing resistance time much. You can even try and focus towards the reliable options, related with the zone of experienced suppliers who are always ready to help you out.
Melt channels checking
Always look for those channels, which are manufactured and also designed with the help of smooth rounded corner and also no dead ends or sharp corners. Look for those manifolds of the Hot Runner Manufacturer, which can be cleaned without any incident occurrence and this, will leave the system full of resin of the degraded quality. These are some positive notes for you to focus at.