Ohm's Law – Single
Ohm's Law – Triple (Delta)
Ohm's Law – Triple (Wye)
Heat Energy Requirements
Wattage Requirements
  • Cast In Heaters for Plastics Processing

    Durex Industries is a leading edge manufacturer of cast-in heater products for the plastics processing industry.  Our products are utilized as the standard for thermal processing on plastics process equipment throughout the world.  Engineering of our cast-in products for extrusion applications is based on our years of expertise in developement of these products for the largest equipment manufacturers.

    Durex has thousands of standard tooling designs available for immediate use.  Our in-house tooling capability can rapidly produce any design available on the market.  Cast In heaters for all plastics processing applications including, air and liquid cooled barrel heaters, L-shaped heaters, vent cut out heaters, heat only cast in barrel heaters, air cooled with shroud, hollow cast nozzle heaters, and cooling jackets for cast in barrel heaters.

    Contact us for Engineering Assistance.

    More Products In This Section

    • Liquid Cooled Cast In Barrel Heaters
      Liquid Cooled Cast In Barrel Heaters
      Liquid cooled cast-in barrel heaters are the most common cast -in heater design used on plastics extrusion barrels. The liquid cooling tubes run symmetrical to the heater element, which provides a uniform cooling pattern across the body of the casting. This cooling function dissipates heat rapidly from the cast-in barrel…
    • Air Cooled Cast In Barrel Heaters
      Air Cooled Cast In Barrel Heaters
      Finned air-cooled cast-in barrel heater designs provide effective heating and cooling for plastics extrusion barrels. The fin pattern can be supplied as a standard height of 1” or manufactured to a low profile thickness for small extruders or applications requiring rapid cooling. This pattern is designed to allow the optimal…
    • Air Cooled Cast In Heaters with Shrouds
      Air Cooled Cast In Heaters with Shrouds
      Individual shroud and blower systems can be used with finned barrel heaters as self contained systems on extruder barrels. The shrouds are manufactured as cast aluminum with bolt mounting or a hinged clamshell design fabricated from stainless steel . The internal design of throat maximizes the airflow over the finned…
    • L-Shaped Square Cast In Barrel Heaters
      L-Shaped Square Cast In Barrel Heaters
      The “L” shape cast-in heater design is typically used on square and rectangular extruder barrels, which utilize a twin, screw design. In most cases, the high operating temperatures in these applications require these cast-in heaters to be constructed of a bronze alloy, however aluminum alloys are used for applications, which…
    • Vent Cut Out Cast in Heater
      Vent Cut Out Cast in Heater
      Special sections of the cast-in extruder barrel such as a vent or feed throat require custom modifications to fit properly. These Vent/Cutout Cast-In Heaters are designed with element locations that maximize heater performance, but allow for special machined sections that could not be added to a standard barrel design. Contact…
    • Heat-Only Cast In Heaters
      Heat-Only Cast In Heaters
      Although not a common design, heat only cast-in barrel heaters are available primarily with the stainless steel mounting strap option. This design is standardly 1” thick and can be used with all standard electrical terminations that Durex offers. The cast-in heat only design can be used on piping areas that…
    • Cooling Jackets for Cast In Barrel Heaters
      Cooling Jackets for Cast In Barrel Heaters
      Cast-in cooling jackets are manufactured for specific applications that do not require heat, but require a uniform cooling source, which can be controlled. The cooling jacket typically is 1” thick with ½” cooling tubes that are either stainless steel or Incoloy® depending on the application. As with other liquid cooled…

    Product Applications

    • Vacuum forming
    • Pressure assist forming
    • Drape and press forming
    • Barrel and sprue bushing heating
    • Hopper heating
    • Manifold heating
    • Hot runner systems



    • Is your question better suited for an Engineer?

      Send your technical questions directly to our engineering team and get answers within hours, not days.

      Ask Now
    • Request Information

      Get the insight and advice you need for your Cast In Heaters for Plastics Processing application

      IMPORTANT: Required fields are marked with an asterisk (*)