Hot runner cannot be separated from insert molding technology, CO injection molding technology and multi-component injection molding technology.
Due to the limitation of runner, the ratio of wall thickness and the problem of welded joints, a large number of parts such as automobile bumper can only be processed through hot runner mold.

In injection molding, the function of hot runner system is becoming more and more important.
Although the hot runner and injection mold are a whole, their functions and functions are completely different from the mold itself.
For the independent unit of the system, its installation, connection and operation have special high-precision positioning requirements.
For these reasons, the assembly of hot runner system is the bottleneck of die installation.
Therefore, it is very important to avoid errors in the installation of hot runner system, simplify system connection and save assembly time.
The hot runner system is derived from the hot runner system. In general, the nozzle is not always installed on the manifold or may be wrongly connected to the flange of the nozzle, but such systems require a fixed plate to maintain the integrity of the system.
For most plastic processing processes, there is a temperature difference between the hot runner and the mold because the mold temperature is close to 200 ° C.
If the system is connected to the template, it will increase the temperature and heat loss, and there may be a dead angle between the manifold and the nozzle.
When the hot runner needs to be repaired, the hot runner must be completely removed from the mold.
Since the nozzle is not connected to the manifold, the electrical and hydraulic lines must be completely removed and connected after maintenance.
In the combined hot runner system, the nozzle and diffuser form a simple unit.
The melt flows directly from the diffuser to the nozzle, so there will be no deviation and dead angle.
By inserting the threaded nozzle into the diffuser, the leakage between the nozzle and the diffuser can be eliminated.
The traditional casing system design will produce thermal expansion, and the combined system is particularly effective in eliminating such leakage.
The combined hot runner system is located in the center of the die and has little connection with the die.
The manufacturing material does not need high thermal conductivity, and there is no need to clamp and pretension the die.
This minimal connection provides a high-precision and stable temperature curve, so the energy consumption is much lower than that of the traditional hot runner system.
The combined hot runner system can assemble the hydraulic circuit directly from the die.
The valve hole directly driven by the hydraulic equipment can also be directly installed on the system, so there is no need for the control valve on the traditional machine, which makes the injection molding more flexible.
In addition, electrical and hydraulic circuits can be configured according to customer requirements.
Since the system will be tested electrically, temperature, hydraulically or pneumatically before delivery, the system will be pre installed so that it can be easily installed in the mold and put into production immediately.
When the mold or system needs routine maintenance, the combined hot runner system can also be taken out of the mold through simple steps, so that it can be repaired and tested independently of the mold.