Cast-In Heaters

Cast-In Heaters for Plastics Processing

Heating and Air-Cooling Plastic Extruder Barrels

Up to now Liquid Cooling Cast-In Band Heaters have been the predominant method of controlling the melt temperature of extrusion barrels. Although effective in removing heat from the extrusion process, there are a number of drawbacks that are primarily maintenance related. Extruders using liquid cooled Cast-In Heaters can be subject to unpredictable and untimely failures of the cooling tube assemblies, resulting in extremely costly downtime to the processor. Inherent maintenance problems include stress corrosion cracks, linear thermal expansion of the heater body, and clogging of the tubes due to accumulation of mineral deposits. Additionally, Liquid Cooled Cast-In Heaters require an expensive cooling tower or heat exchange system, extensive plumbing systems and labor for installation.

Tempco-designed air-cooled systems have evolved considerably and become more thermally efficient as a result of geometric changes and implementation of sophisticated shrouding and air flow techniques. Optimized direction and ducting of airflow, coupled with selection of the proper blower CFM, are important to ensuring that the air cooling technique removes the proper amount of heat from the extrusion barrel

Cast-In  Heaters for Diverse Applications

Although Tempco is widely recognized as the industry leader in manufacturing Cast-In heater/coolers for the plastics industry, our capabilities and the application possibilities for utilizing Cast-In Heater Technology extend far beyond the scope of plastics machinery. Tempco has set industry standards by creating custom designed Cast-In Heaters of every imaginable size, shape and electrical rating that can safely and practically address the diversified requirements of industrial and commercial markets.

Design Specifications

Installation Recommendations (Catalog PDF)