Text version of the page

Barrel Heaters

Ceramic KnuckleBand

Features and Benefits Applications Ceramic insulator •Provides excellent protection fromabrasion •Injection molding barrels •Extruder barrels •Blown film dies Ceramic knuckle band heaters aredesigned to provide high-perfor- mance barrel heating at temperatures up to 760°C (1400°F). This level of performance is achieved from the ceramic knuckles that provide excel- lent insulation and long heater life.The construction of the ceramicknuckle heater includes interlocking ceramic blocks with resistance wiresthreaded through holes within the ceramic.This method provides superior heat distribution across the band, resulting in a uniformly heated surface.Ceramic knuckle heaters are specifically engineered and manufactured with three layers: •Aluminized steel sheath layerimproves mechanical protection to heater and resists corrosion.•Ceramic fiber layer providesthermal insulation, energy conser- vation and minimizes heat loss.•Ceramic knuckle layer providesmechanical protection and electrical insulation to the resistance element, which increases heater life and con-ducts or radiates the heat to the surface. •Allows for high temperatureoperation•Provides longer heater life •Accurate heating Aluminized steel cover Radiation or conduction heattransfer •Ensures dependable heat transfermethod Performance Capabilities •760°C (1400°F) maximumoperational temperatures•Watt densities up to 45 W/in
2 Standard Construction •Aluminized sheath•Clamp tabs •Post terminals 14