What is the introduction of Semi-Hot Runner Mold?

Hot runner moulds are an excellent choice for many reasons. They are less expensive to manufacture, produce less waste and speed up cycle times. But they are not without disadvantages. The process takes time to stabilize and there's the potential for melt leakage, which will increase waste products at first.

The melt temperature varies between 200 and 260 degrees Celsius. This is a significant factor to consider, since the melt temperature will affect the fluidity of the polymeric material. Consequently, the final properties of molded pieces will be impacted. However, previous studies did not look at the effect of injection process conditions on the final properties of the part.

Semi-hot runner moulds offer a number of advantages. For one thing, they require lower injection pressures, which make them suitable for small-volume parts. However, some applications may not be suitable for hot runner moulds. For example, some materials are too sensitive to be molded using this method. Another consideration is the time-to-temperature relationship. This can make the process uneconomical for a small-volume part.

Hot runner moulds use two plates heated through a manifold system. This manifold controls the heat inside the mold and sends the molten thermoplastic to the nozzles, which fill the core mold. The heated system is housed in a separate plate and remains stationary during the molding cycle. Once the cycle is completed, the core molding plate will open, revealing the end-molded part without the runners.