What is the relevant knowledge of Semi-Hot Runner Mold?

Generally speaking, semi-hot runner moulds are applied to the industrial applications. These products are used in the construction and office equipment industries. They can be used to produce PC shells, automobile interior door panels, PBT, PVA, and ABS.
These molds are made of two heated plates that are held together in a manifold system. The manifold is used to maintain the proper temperature of the plastics. It also guides the plastic melt from the distributor bushings to the nozzle gates.

The injection process needs to deliver the melt from the barrel to the cavity. The quality of the final part is determined by the flow control of the melt. If the plastic melt is not properly delivered to the cavity, the final product will not be good.
The melting temperature affects the fluidity of the polymeric material. It is therefore important to understand the effect of melt temperature on the final properties of the molded piece.

The two main types of hot runner mold systems are externally heated and internal heated. Externally heated systems are more insulating. They also reduce the heat loss to the rest of the mold.
Internal heated systems require higher molding pressures. They also result in material degradation. They are also difficult to control color changes. They also need a separate plate housing for the runner.
A three plate cold runner mold is a more flexible design. It also contains a stripper plate, which separates the runner from the mold.