Lindberg/MPH, an American manufacturer of industrial heat treat furnaces, announced the shipment of two (2) car bottom industrial furnaces used for curing aircraft engine hardware consisting of ceramic-metallic composite shapes. Both furnaces heat a maximum 5,000 lbs load. One unit heats from 200°F to a maximum temperature of 2100°F. The second unit heats to 2800°F. The electrically powered furnaces utilize two heating systems; an auxiliary preheater and an air recirculation system to achieve uniform temperature at low temperatures, as well as radiant heating elements for uniform high temperature operation. The customer required temperature uniformity of ± 20°F for an optimal cure.
The workloads are manually placed on a self-driven car and driven into the industrial furnaces. The car bottom furnaces also feature fast cooling technology. The re-circulating blower pulls air from the pre-heater, re-circulates it through the furnace and then back through the pre-heater again. A butterfly valve allows the pre-heater air piping to be by-passed and cool ambient room air to be pushed into the furnace chamber for fast cooling. Roof mounted exhaust flues with air cylinder operated coves open during the low temp curing process to vent fumes from the product as well as during the fast cooling process.