Continuous air circulation furnaces or ovens are offered for constant, high production jobs. They are used for drying parts after processing, painting etc. . Also in filter manufacturing industries for pleating setting and curing of filter papers. They can also be used for stress relieving of various metals after forming or welding operations, and hydrogen de-embrittlement (after plating).

Continuous air circulation furnaces are usually multi-zone controlled for better process control. Individual zones can have preset temperature controls for best process results. These can be heated directly electrically, or indirectly heated using electrical or gas / oil fired heater batteries which are circulated through blowers to maintain accurate temperature gradient required on all the zones. Numerous options such as mesh belt, pusher mechanism, flat belt or heavy link chain based conveying methods can be selected as per operational function and necessity. All safety features are taken care of. Baffles or muffles are provided in direct heating. Fixed with precise, dynamically balanced air circulation fans aesthetically fitted to prevent noise, vibration and achieve uniform temperature. For safety, torque limiters are provided in any eventuality the conveyor stops working. Limit switches, proximity sensors and other safety device are provided for safe functioning. In addition annunciators are given in control system with hooters so that any errors or malfunctions are highlighted by audio and visual aids. Automatic pneumatic chain tensioners are provided so that chain sagging, derailing after exposure to thermal expansions are prevented.

Therelek also manufactures feeding systems – bucket conveyor type or elevator based with vibratory feeders for automated loading of components. Components can be directed from previous operation or loaded onto a hopper from where PLC and/or SCADA based control system transfer and handle the components until they exit from the furnace cooling zone to the unloading station or area. Continuous operations that require fast cooling are provided with an additional cooling zone to bring down the temperature of components before unloading.

Temperature Range :
Upto 800°C

Loading Options :
Conveyor Belt / Pusher Type/ Roller Hearth

Insulation :
Vacuum Formed Ceramic Fibre Boards, Ceramic Fibre Blanket, Brick Lining

Heating Elements :
Nichrome Wire / Special Alloy Resistance Heating Wire

Instrumentation :
Thyristor, Programmable Temperature Controller, Temperature Recorder, PLC, SCADA, HMI


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