By the heating process to runner and gate, melted plastic could keep at a stable temperature and pressure. Melted plastic could fill cavity with less resistance. In simple words, hot runner system could be treated as an extension of nozzle for delivering plastic to each gate.
The main function is that it can provide the plastic flow from the machine nozzle to the mold cavity by a precision control system. Through the temperature and sequence control system to the runner and gating (manifold and nozzles), we can get better part quality of plastic products, efficiency production speed and lower production costs, also complicated products is available. Compare to the car: the hot runner system is like the oil system within the car. A good-design and good-control of oil system, it can provide fuel-efficient, fast, stable, and suitable for a variety of terrain and climate. Therefore hot runner system could simplify and improve molding process. To save energy and be more environmental are the main features of hot runner system.
Energry save and environmental protection：
There is no scrap generated in the molding process of hot runner system. It solve the problem of environmental and process efficiency.
The work of scrap recycle is eliminated. Therefore the crush process for scrap is not necessary, simultaneously noise is avoid from crusher. Basically, hot runner system is helpful in resources saving, energy saving and noise prevention.