Cast Aluminium / Bronze heaters provide for better results, where uniform heat distribution and efficiency is important. The high thermal conductivity of aluminium / bronze allows for an extremely uniform temperature to be applied to the component surfaces, alleviating hot or cold spots which may affect the equipments performance.

Heat is provided by a tubular sheathed wire element, which has long been recognised for its reliability, strength and adaptability. It is due to the versatility of this element that cast heaters can be manufactured to suit limitless applications and specifications.

Cast Aluminium Finned heaters

Forced air cooling of extruder barrels using finned heaters has proved itself in the field for many years. Advances in casting methods producing more fin area and with increased output and efficiency of modern blowers enables air cooling to compete with water cooling in many applications.

It's advantages are

  • Clean
  • Efficient
  • Relatively inexpensive
  • Easy to maintain

The finned heaters are cast in halves bolted together and machined in pairs to fit exactly on extruder barrels. They can be supplied with close fitting insulated air cowls to increase efficiency, reduce heat loss and outer casing temperatures. These can also be fitted with inlet / outlet flanges or supplied with high output blowers matched to the heater to provide a complete heating / cooling unit.

We also specialise in complete machine conversions from liquid cooling to air cooling to improve both the efficiency and reliability of many  older ceramic heater based methods.

Our qualified design engineers would welcome the opportunity to discuss and advise you on your cast heater requirements and applications.

The following are a few examples of heaters made for specific application both end user and OEM.

For further information please contact us at:

TD Thermal Ltd

Unit 19

Brookside Business Park

Cold Meece



ST15 0RZ


Tel:       01785 761552

Registered in England and Wales No. 5594441

VAT No. GB 873 7030 19

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