Lucifer Furnaces Inc., Warrington, Pa., has received an order for an electric, ceramic-fiber-lined box furnace from a leading U.S. manufacturer of stamped automotive products. Model LI7-M18, with a chamber size of 12x18x18 inches, quickly heats to a uniform temperature of 2200°F. A hotface of two-inch-thick ceramic fiber insulation with three inches of coldface mineral wool block insulation around the entire chamber, maximizes heating efficiency with low power input.
Ceramic Fiber insulation, with low heat storage and low thermal conductivity, combined with high thermal shock resistance, allows faster heat-up/cool-down cycles, reducing wait times between loads and resulting in higher production.
Heavy gauge coil wound Kanthal A1 iron-chromium-aluminum wire heating elements are supported on ceramic rods, providing rapid heat-up. Elements mounted on both side walls can be easily replaced individually, reducing cost. A one-inch-thick hearth plate protects the floor insulation and supports up to 40 pounds per square foot of hearth area.
Temperature is monitored by a rear-mounted Type K thermocouple, and is regulated by a Honeywell DC2500 microprocessor-based digital time proportioning temperature controller. An insulated horizontal swing door with a tight seal comes standard with safety switch.
Ceramic fiber lined furnaces are general purpose box furnaces for batch heat treating in an air atmosphere.
