Cartridge heater for hot runner system

Cartridge heaters provide consistent heat to the hot runner manifold and nozzles, ensuring the plastic material remains in a molten state as it travels from the injection unit to the mold cavities.They help to get uniform temperature distribution across the system, preventing issues like cold spots, which can lead to material flow problems or inconsistent molding quality.

With its compact structure, high power density and precise temperature control, cartridge heater has become the preferred solution for heating in hot runner systems:hot runner nozzle heating, flow plate heating system,valve needle system heating.

Special requirements for heating the hot runner system:
High-temperature performance: Capable of operating continuously in a high-temperature environment ranging from 300 to 450 degrees Celsius.
Temperature uniformity: The temperature fluctuation of the melt within the flow channel should be controlled within ±1-2℃.
Quick response: Adjust the temperature rapidly according to the injection molding cycle.
Space limitation: Effective heating must be achieved within an extremely limited space.
Reliability: Resistant to chemical corrosion and mechanical wear caused by plastic melts.

The key application of cartridge heater in the hot runner system
1. Heating of the hot runner nozzle
Technical challenges is as below
Diameter limitation: Φ8 - 16mm, with a narrow heating space
Large temperature gradient: The distance from the heater to the gate is short, requiring rapid heat conduction.
Leak-proof design requirement: Prevent the melt from penetrating into the heating zone

For the nozzle areas, cartridge heaters are inserted into the nozzle body to maintain the required temperature as the molten plastic is injected into the mold cavities.

The compact design of the cartridge heater allows them to be installed in tight spaces without disrupting the overall structure of the hot runner system.They are designed to afford high temperatures and thermal cycling, ensuring long-lasting performance in hot runner applications.

Over time, cartridge heaters in hot runner systems may wear out or lose efficiency. Regular inspection and testing of heaters ensure they are functioning properly.

The application of cartridge heater for hot runner system demonstrates significant technical advantages and economic value. Its compact structural design, efficient heating performance, and precise temperature control capabilities make it an indispensable key component in modern injection molding technology.

By scientifically applying the cartridge heating element technology, the performance of the hot runner system can be significantly enhanced, providing a reliable guarantee for high-quality and high-efficiency injection molding production.

Attention

Avoid the bending of the lead wire of the cartridge heater element.

Be careful not to damp. It is recommended to start with low pressure.

Control the temperature of heating element's lead outlet, flange and fixer.Conductor outlet temperature should below 130 ℃ and the flange temperature below 180 ℃.

Please do not knock or modify the cartridge heater element, otherwise it may cause damage to the heating element, short circuit, electric shock and other problems.

The items listed below are factory stock. Other sizes are available: please contact us

1/8" Diameter (0.125") 5/32" Diameter (.156") 3/16" Diameter (0.1875") 1/4" Diameter (0.25")

1. Working environment, whether embedded dry burning or exposed air dry burning, or liquid heating;

2. Temperature, including the ambient temperature and the temperature required by the heated body;

3. Whether the surface load is matched with the sheath material and the internal insulation material;

4. If the liquid is heated, the corrosion resistance of the sheath material should be considered.