Even when all of the machine parameters have been set up to their optimal level and the parts are coming out beautifully, that doesn’t quite mean the operator can just walk away from the machine. There are still some things that can happen which must be monitored at all times.
For one, machines are subject to wear and tear. That means that valves can leak or check rings can fail. If that happens it will be impossible to maintain consistent molding pressure. So the machine must be monitored all the time and kept in perfect working order.
Another problem happens when moisture gets into the resin mix. Water vapor, when it’s under a lot of heat and pressure, will of course react as steam and push back against the mold interior. This can make proper mold filling impossible. That’s why proper pellet driers using desiccants are the only way to ensure consistent moisture percentage.
Understanding a little more about how this process works can help you communicate more effectively with your supplier, and also reinforces the importance of good mold tool design.
