A hot runner system usually consists of a hot nozzle, a separator, a temperature control box and accessories. Hot nozzles usually include hot nozzle type, pouring sleeve type and valve needle type.
The diverter plate is used for multi-cavity or multi-point feed or single point feed in the mold, but the feed amount is biased. The material is usually P20 or H13 and is usually divided into two categories: standard and non-standard. Its structural form mainly depends on the distribution of the mold cavity on the mold, the arrangement of the nozzle and the location of the gate. Temperature control box includes host, cable, connector and wiring socket. Hot runner fittings typically include heaters and thermocouples, runner seals, connectors and junction boxes.
With the increasing popularity of hot runner technology in China, its components show the following major development trends.
The miniaturization of 1 part can realize the multi-cavity mold of small products and multi-gate die of large products. By reducing the nozzle space, more cavities can be placed on the mold to improve the yield and utilization of the injection molding machine.
The standardization of parts is conducive to reducing the repeatability of design work, reducing the cost of molds, facilitating the replacement and maintenance of vulnerable parts, and meeting the requirements of increasingly short mold design and manufacturing cycles.
Improves the overall reliability of pressure distribution, temperature distribution and seal design.
The temperature control system is very precise to prevent the resin from overheating and long degradation, and reduce product performance.
Improve the wear resistance of nozzles and hot runner and form sensitive materials.