Convection Ovens for Small Medical Parts

Lucifer Furnaces, Inc. (Warrington, PA) recently supplied several Model 42-B18 convection ovens to a manufacturer of small medical parts in the southern U.S. These ovens have a working chamber size of 9 in H x 9 in W x 18 in L that heats to 1,200 deg F. Uniformity is achieved with recirculating air flow: a rear-mounted heavy duty fan directs air along side wall heating elements then through the working zone. Parts are protected from heating elements with a 16 ga stainless steel liner. The furnaces are insulated with 4.5 in of multi-layered firebrick and 2 in insulating cold face block with overlapped seams for reduced thermal loss.

Controls onboard include a Honeywell UDC3500 digital time proportioning temperature controller with four 20-segment setpoint programs, as well as a Honeywell high-limit controller to prevent temperature excursions. Side wall heating element banks consist of coil-wound resistance wire in ceramic holders, making replacement easy. The furnace shell is constructed with heavy gauge sheet steel reinforced throughout to form a rigid freestanding floor model. A horizontal swing door with adjustable latch provides a firm brick-to-brick seal, while the safety switch powers-off both fan and heating elements when door is opened to protect the user.

Lucifer Furnaces, Inc., 2048 Bunnell Road, Warrington, PA 18976, 800-378-0095, [email protected], www.luciferfurnaces.com.