Nowadays, the hot runner system has gradually entered the market, and various related technologies have also emerged, such as co injection molding technology, insert molding technology, multi-component injection molding technology and so on. As an important part of mold system, hot runner system can effectively improve the quality and production efficiency of plastic mold.
The hot runner system originates from the hot runner system. Generally, the nozzle is not always installed on the diverter plate, and it can also be connected to the nozzle flange virtually, but such systems need a fixed plate to maintain the integrity of the system. For most plastic processing processes, because the temperature of the mold is close to 200 ℃, there is a temperature difference between the hot runner and the mold. If the system is connected to the die plate, the temperature will be increased and the heat loss will be increased, and the flow dead angle may also be generated between the diverter plate and the nozzle. When the hot runner needs maintenance, the hot runner must be completely removed from the mold. Since the nozzle is not connected to the diverter plate, the electrical and hydraulic lines must be
completely disassembled and connected after the maintenance.
Although the hot runner and the injection mold are a whole, their functions and functions are completely different from those of the mold itself. For the independent unit composed of the system, its installation, connection and operation have special high-precision position requirements. For these reasons, the assembly of hot runner system has become a bottleneck of mold installation. Therefore, it has become a very important subject to avoid errors in the installation of the hot runner system, simplify the system connection and save the assembly time.
Introduction of combined hot runner system
The combined hot runner system is located in the center of the mold and has few connections with the mold. The manufacturing material of the combined hot runner system does not require high thermal conductivity, clamping and pretensioning of the mold piece. This minimal connection provides a high accuracy and stable temperature profile, so the energy consumption is much lower than that of the traditional hot runner system. The combined hot runner system can directly preassemble the hydraulic circuit independent of the mold. The valve gate directly driven by the hydraulic equipment can also be directly installed on the system, so that the control valve on the traditional machine is omitted, making the injection molding more flexible. In addition, electrical and hydraulic circuits can also be configured according to customer requirements.
In the combined hot runner system, the nozzle and the splitter plate form a simple unit. The melt flows directly into the nozzle from the diverter plate, so there is no deviation or dead angle. The threaded nozzle is embedded into the diverter plate, eliminating the leakage between the nozzle and the diverter plate. The conventional liner system design generates thermal expansion, and this combined system is particularly effective in eliminating such leakage.
Because the system will undergo electrical, temperature, hydraulic or pneumatic testing before delivery, customers will be given instructions on the pre installation system, so that they 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 disassembled from the mold by simple steps, so that it can be repaired and tested independently of the mold.
The combined hot runner system can reduce the maintenance cost very well, and it is also very convenient in disassembly. The integrated hot runner system can be maintained without disassembly, saving time and cost.
