These heaters are specially designed for use in hot runner systems for plastic injection molding.
The heaters provide excellent heat transfer and easy installation, as they do not require retainers along the length of the body. The heaters are simply pressed into the bore and are ready for operation.
Flexible heaters with square or “D” cross-section guarantee perfect stability inside the bore and optimal contact, ensuring efficient heat transfer from all sides of the heater.
Technical Specifications
• Cross-section side tolerance: ±0.1 mm;
• Outer sheath: stainless steel;
• Maximum operating temperature (on the metal sheath): 600 °C;
• Supply voltage: max. 250 V, standard: 230 V;
• Power tolerance: ±10%;
• Dielectric strength: 1000 V AC;
• Electrical insulation (cold heater): >5 MΩ at 500 V DC;
• Leakage current (cold heater): <0.5 mA at 253 V AC;
• Length tolerance: ±1.5% for lengths up to 1500 mm;
• Specific power: 10 W/cm²;
• Tolerance of the unheated section length: 17 mm at both ends.
REFLEX Square Heaters – Metal Braided Cable
REFLEX square heaters by Rotfil are designed for applications where stable installation and reliable thermal contact with the heated surface are required. The square cross-section ensures proper positioning in mold channels and allows efficient heat transfer on three sides of the heater. This design supports uniform temperature distribution and improves heating efficiency.
The metal braided supply cable provides additional protection when operating in industrial environments.
Catalog information and orders – HERE
REFLEX D Heaters – D-Shape with Metal Braided Cable
REFLEX D heaters by Rotfil are designed with a special D-shaped geometry optimized for installation in round channels. Thanks to this combined shape, a significantly larger contact area with the surface is achieved, improving heat transfer efficiency. The contact area can reach up to 72%, compared to approximately 50% with standard round heaters. This results in faster heating and higher energy efficiency in industrial applications.
Catalog information and orders – HERE
HFH Heaters with Segmented Elements
HFH heaters with segmented elements are flexible tubular electric heaters designed for installation in channels of industrial molds and manifolds. They are constructed from a resistive wire (NiCr) insulated with magnesium oxide and protected by a metal sheath, ensuring good thermal conductivity and electrical insulation.
The segmented (“vertebrae-type”) construction allows the heater to be bent and shaped according to the geometry of the heated component. They are most commonly used in injection molds and hot runner systems, where precise and uniform heating is required.
Catalog information and orders – HERE
Heater Installation Method (Press-Fitting) and Why It Is Important
Proper press-fitting of the heater into the bore of the tool is extremely important for its efficient operation and long service life.
Why it is important:
• Ensures good thermal contact between the heater and the tool
• Guarantees uniform heating
• Reduces heat and energy losses
• Protects the heater from overheating and damage
• Extends the service life of the heater
A video showing the press-fitting method in injection molding systems can be viewed – HERE
KRASCO
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