INDUSTRIAL AND COMMERCIAL INFRARED SYSTEMS DESIGNED FOR YOUR APPLICATION
Mica electric band heaters are used for heating cylindrical surfaces and a wide range of industrial equipment like extruders, injection molds, pipes, granulators, blow molding, and blown film equipment.
Band mica heater consists of a stainless steel housing with a resistance wire inside, wound around a mica sheet. We use only the best nickel-chrome wires like Kanthal with high electrical resistivity.
Micanite insulation provides high thermal conductivity and dielectric strength. Sometimes band heaters are made detachable and consist of two half-rings. In this case, they are called semi-rings.
Depending on the application, extrusion heater bands have different diameters and widths. Upon customer's request, mica band heaters are manufactured with holes, cutouts, and thermocouple retainers.
| Technical specifications | |
| Minimum diameter, mm | 23 |
| Maximum diameter, mm | 380 |
| Minimum width, mm | 18 |
| Maximum width, mm | 300 |
| Thickness, mm | 4 |
| Maximum power density: w/cm² | 5 |
| Supply voltage, V | up to 450 |
| Operating temperature, °C | 350 |
For the mica band heater's effective and long-term operation, you must ensure an ideal contact between the heater and the heated surface. Ensure that the heated surface is clean and has a correct shape with no bumps and minimum roughness.
To avoid overheating, it is necessary to ensure uniform heat dissipation of the entire working surface of the heater. The high-temperature mounting paste can be beneficial here. During installation, tighten the heater on the cylinder's surface, apply power to it, and allow it to reach half of operating temperature (around 175 °C), then cut the power and tighten it a bit more to level out the thermal expansion.
Normally, extruder heater bands cannot function in humid environments. However, a small amount of water does not harm the heater's operation thanks to the metal housing.
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