Optimized spiral nozzle

Today’s advanced injection molding technologies, such as insert molding, multi-layer injection molding, and multi-material (cavity) injection molding, cannot lack hot runner technology. Large parts such as automobile bumpers are affected by the ratio of melt flow distance to part wall thickness and weld lines. Restrictions, the hot runner system must be used in production. Hot runner technology is playing an increasingly important role in the field of injection molding.
INCOE’s characteristic spiral hot nozzle is fastened on the runner plate by threaded connection (see Figure 1), while the traditional “pouring sleeve” hot runner system relies on calculation of thermal expansion and template compression. Fix its position (see Figure 2), so material leakage is likely to occur between the nozzle and the runner plate during thermal expansion, and the spiral type fundamentally eliminates the possibility of material leakage between the nozzle and the hot runner plate, thereby avoiding Frequent shutdowns caused by leakage of materials.
Five advantages of the hot runner system composed of spiral hot nozzles:
(1) The hot runner system has a simple structure and is more convenient to install;
(2) The mold structure is simplified and the cost is reduced (a fixed plate is reduced, etc.);
(3) Avoid material leakage between the nozzle and the hot flow plate;
(4) Realize the integration of hot runner system (the unique product of INCOE, see Figure 6).
(5) Replacement of spare parts. It is not necessary to disassemble all the templates during system maintenance. As long as the back plate is opened, the entire hot runner system can be taken out of the mold, which can effectively reduce the workload and shorten the downtime.
INCOE’s spiral hot nozzle also has its advantages in the design of the hot half mold. The traditional hot mold half is developed on the basis of the hot runner system. Its nozzle is not directly fixed on the runner plate, but hovering against the runner plate. Therefore, this system needs a fixed plate to hold The nozzle and the runner plate are tightly connected together. Since the average temperature difference between the hot runner system and the mold used in most plastics is about 200 degrees Celsius, and there is contact between them, it will increase the loss of temperature and energy. At the same time, there may also be a dead angle of molten material flow at the junction of the runner plate and the nozzle, which will affect daily production. When the hot runner needs maintenance, the traditional hot half mold must be completely disassembled. Since the nozzle is not connected and fixed to the runner plate, the electrical and hydraulic connections must be completely or partially disassembled. The connection of the components is restored. Compared with the hot runner system of the spiral hot nozzle, this will consume more time and may repeat some installation errors.
The core technology of the spiral hot nozzle is embodied in the thread part of the connection between the nozzle and the hot flow plate. INCOE has a unique design here and uses special materials to make it have a certain degree of elasticity. This elasticity can ensure that the system is heated, The nozzle will not break due to excessive expansion. But the spiral nozzle also has its own application range. INCOE engineers will provide the most optimized solution according to the actual situation of the project to ensure that the customer is foolproof when using it.