Cast-In Heaters for Plastics Processing

----Cast In Heaters for Plastics Processing.jpgDurex Industries is a leading edge manufacturer of electric cast-in heater products for the plastics processing industry. Our heaters are utilized as the standard for thermal processing on plastics process equipment throughout the world. Engineering of our electric cast-in products for extrusion applications is based on our years of expertise in the development of these products for the largest equipment manufacturers.

Durex has thousands of standard tooling designs available for immediate use or can custom design a cast heater to fit your application. 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 barrel heaters, air cooled with shroud, and cooling jackets for barrel heaters.

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Liquid Cooled Barrel Heaters

Liquid cooled 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.

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Air Cooled Barrel Heaters

Finned air-cooled 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.

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Air Cooled 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.

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L-Shaped Square Barrel Heaters

The "L" shape 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...

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Vent Cut Out 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 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.

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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 standard 1" thick and can be used with all standard electrical terminations that Durex offers. The heat only design can be used on piping areas that...

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Cooling Jackets for 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 1/2 " cooling tubes that are either stainless steel or Incoloy® depending on the application. As with other liquid cooled...

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

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