Description

The hot runner heater for plastic injection is a crucial heating component in plastic injection molds. Its main function is to maintain the plastic in the runner in a molten state, preventing it from cooling and solidifying, so saving raw materials and improving production efficiency. It is usually installed on the nozzle or plate of the hot runner system and used in conjunction with a temperature control box, make sure that the plastic remains at the appropriate temperature during injection.

During the injection molding process, the hot runner heater functions like a blood pump, ensuring that the material flows at the correct temperature. Depending on different application scenarios, different requirements are imposed on heating speed, uniformity, and durability. Therefore, it is crucial to understand the core indicators and selection criteria of this component.

The hot runner heater, as the name suggests, is a device which provides heat to the flow channels within an injection mold. It plays a crucial role in the plastic product manufacturing process, effectively reducing the flash and burrs on the products, improving the surface smoothness of the products, and extending the service life of the mold.

The hot runner heater uniformly heats the runner through its built-in heating element (typically a nickel-chromium alloy resistance wire), maintaining a constant temperature. This is done to enable the molten plastic to flow smoothly from the injection machine nozzle into the mold cavity, while preventing adverse effects caused by cooling and solidification. Additionally, it has an intelligent temperature control function, which can precisely regulate the temperatures at various parts to ensure the coordination and consistency of the entire pouring system.

For example, in certain precision component manufacturing fields, due to the material properties and forming process requirements, extremely high temperature accuracy (within ±1℃ range) may be necessary. This require the technical proficiency of the hot runner heaters.

Generally speaking, small injection molding factory can choose economical hot runner heaters with low power which can meet daily production needs; while for large injection molding enterprises, they should prefer to purchase models with higher power and support for remote monitoring, so as to better cope with complex and variable application scenarios.

The hot runner heater for plastic injection can be wound or bent according to the customers wish in nearly every geometrical form; therefore it offers a great adaptation on solid surfaces which require to be heated.

When thicker metal in an alternating magnetic field, it will produce electric current .The metal current become stronger , temperature of metal became higher. The device is a kind of energy-saving equipment . it is installed in the combustion equipment before combusting, the high temperature (105 DEG -150 DEG) issued to reduce the fuel oil viscosity, promote full combustion . 3.45x3.45mm straight hot runner coil heaters is widely used in hot-runner molds,blow molding,extrusion and hot nozzles.The hot runner heaters are annealed to acquire malleability for bending into any shape. Injection molding coil heaters with thermocouple are also available.

Function

Prevent plastic solidification: By continuously heating, keep the entire flow path from the nozzle of the injection molding machine to the gate of the mold at a high temperature, so that the plastic does not harden in the flow path.

Save raw materials and costs: Since the plastic in the flow path does not solidify, there is no need to remove the solidified material from the flow path each time the mold is opened. This directly saves plastic raw materials and reduces the subsequent processing of waste materials.

Improve product quality: Precise temperature control can reduce injection stress, make the plastic filling more uniform, especially for heat-sensitive materials, avoid material degradation, and ensure the stability of product dimensions.

Techinical Data

Sheath Material	Cr Ni-Steel	Thermocouple	J-type(standard); K-type
Insulation Material	MgO	Length Tolerance(straight)	0.05
Resistance Wire	NiCr 80-20	Wattage Tolerance	0.05
Thermocouple	J-type; K-type	Resistance Tolerance	0.05
Max. Sheath Temperature	650℃	Unheated Length	35mm(standard)
Die Electrical Strength	800V A/C	Dimensional Tolerance	Coil I.D + 0.1~0.2mm
Insulation	>5MW		Coil length +1mm