This application, a top and bottom heated press utilizing a cast aluminum plate, presented limitations on the type of heater that can be used due to the harsh environment and duty cycle. Uniform heat on the cast aluminum plate is imperative since there needs to be an even heat transfer on the end process. The application details include:

• 44 inch x 48 inch top and bottom plates
• Total force applied in the press is 220,000 lbs!
• 5-inch-thick cast aluminum plate
• Temperature requirement of ambient temperature to approximately 350°F within a 30-minute period

To uniformly heat the cast aluminum plates, Tempco Hi-Density Cartridge Heaters are inserted into the 16 drilled holes the length of the heater block. Cartridge heaters are an ideal solution because of their ability to withstand a harsh environment without causing maintenance issues or requiring frequent replacement. The design features of these heaters are:

• ¾-inch heater diameter
• 45-inch heater length
• 1 inch of unheated length at the lead end
• Flexible, internally connected electrical termination that is resistant to wear and fatigue over time despite continuous movement from the heated press and a relatively harsh environment
• Potted end seal rated for 1000°F/538°C
• Mounting flange that secures the heaters into the aluminum plate during the plate’s movement.

Heaters mounted into cast aluminum plate for large format heat press

Type M2 Termination: Potted End Seal