| Ceramic knuckle band heaters are designed to provide high-performance heating at temperatures up to 760°C (1400°F). This level of performance is achieved from the ceramic knuckles that provide excellent insulation and long heater life.
The construction of the ceramic knuckle heater includes interlocking ceramic blocks with resistance wires threaded through holes in the ceramic. This method provides superior heat distribution across the band, resulting in an uniformly heated surface. Ceramic knuckle heaters are specifically engineered and manufactured with three layers:
- Aluminized steel sheath layer - improves mechanical protection to heater and resists corrosion.
- Ceramic fiber layer - provides thermal insulation, energy conservation and minimizes heat loss.
- Ceramic knuckle layer - provides mechanical protection and electrical insulation to the resistance element, which increases heater life and conducts or radiates the heat to the surface.
Specifications
Diameter: 50.8 mm (2 in.) to 381.0 mm (15 in.)
Width: 38.1 mm (11/2 in.) to 254 mm (10 in.)
Thickness: 12.7 mm (1/2 in.)
Sheath: Aluminized steel (stainless steel optional)
Watlow manufactures a variety of band and nozzle heaters including barrel heaters, mineral insulated band heaters and ceramic knuckle band heaters. For more information about band and nozzle heaters, please contact your local Watlow representative.
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Heaters
Led by the high performance MI (mineral insulated) Band heater, the patented, flexible THINBAND® heater and the standard mica band heater for specialized constructions, Watlow's band and nozzle heaters are ideal for every type of plastics processing equipment.