Thick Film Cylindrical Heaters
The innovative thick film heating technology from Watlow provides the injection molding industry with a patented high-performance, low profile hot runner nozzle heater. The direct surface contact of the thick film material to the cylindrical stainless steel hot runner heater sleeve creates optimal heat transfer while the non-porous glass film prevents moisture absorption which results in dielectric failure in coiled heaters.
Thick film resistance heaters consist of a sandwich of several different materials. These layers include a metal substrate, a layer of glassy dielectric material, a resistor layer and a final dielectric layer. Thick film cylindrical heaters can be designed to put the heat precisely where it is needed. The cylindrical heater also provides greater control over standard coiled cable heaters. The heater can have a customized nozzle temperature profile.
Unlike coiled cable heaters, Watlow's thick film nozzle hot runner heater allows the thermocouple to be immersed directly into the hot runner nozzle. This provides a distinct advantage over the design of commonly used coiled cable heaters which have internal hermocouples because the actual nozzle temperature is measured, not the internal heater temperature.
US Patent Number 5,973,296
- Specifications
- Applications
- Features & Benefits
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Specifications:
| Material | Maximum Operating Temperatures | Maximum Watt Densities | ||
|---|---|---|---|---|
| °F | °C | W/in2 | W/cm2 | |
| 430 stainless steel | 842 | 450 | 75 | 11.6 |
- 430 stainless steel sheath temperatures up to 842°F (450°C)
- Watt densities up to 75 W/in2 (11.6 W/cm2)
- Voltages ranging from 100 to 240V are available for agency recognition
Applications:
- Hot runner nozzle
Features & Benefits:
| Features | Benefits |
|---|---|
| Uniform thermal profile and ability to pattern heater layout |
|
| Low thermal mass |
|
| Extremely low radial profile |
|
| Moisture-resistant, non-porous glass film construction |
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Related Literature
Specification Sheets (3)
Brochures (3)
Quality Certificates (1)
Catalogs (4)
Images:
Thick Film Cylindrical Heater |