Electric Conveyor mesh belt type furnaces are used for continuous heating purpose of large quantities of goods. Conveyor belt continuously rotate through the furnace electrically which poses the temperature (ambient to 1150°C). Material to be heated is kept at one end on belt which passes through the furnace. This is a continuous process for annealing.
The special feature’s which made Mesh Belt Furnace’s common among users are maximum uptime, very low energy costs & excellent repeatable heat treatment which results in some of the special features of Mesh Belt Furnace.
Tempsens offer mesh belt furnace for various heat treatment and process applications. We have a team of experts who can study and offer custom engineered solution to meet unique requirements. These furnaces are suitable for copper brazing, silver brazing, bright annealing of stainless steel tubes, bright annealing of copper and carbon steel tubes, and sintering.
The unit comes with proven mesh belt design that can withstand temperature up to 1150 °C. Higher temperature versions can also be offered after studying the customer’s specific requirements. A variable speed drive unit with widely adjustable belt speeds allows the treatment of different thicknesses of materials and grades with varying temperature-time requirements. The heat resistant high temperature alloy belt is driven from the charge end of the furnace by a pinch roll, which presses the mesh belt tightly against a rubber drum. Belt stretching is reduced since only a minimum tension is needed to pull the belt through the furnace.
The furnace is designed to operate with hydrogen atmosphere, cracked ammonia atmosphere, nitrogen and argon atmosphere. The furnace is provided with a heat resistant muffle to facilitate introduction of protective atmosphere. The heating section muffles are manufactured from stainless steel 310 S or Inconel 600. Measurement of Dew point and oxygen PPM inside the protective muffle and Gas flow measurement systems are provided to ensure atmosphere stability. This ensures close monitoring of furnace atmosphere, thereby ensuring no discoloration or oxidation of the parts.
The furnace heating is by means of electric heaters distributed in multiple control zones. Each control zone is provided with PID temperature controllers and thyristor power controllers to very closely control the temperature.
Low density insulation material is provided to ensure less heat loss. The muffle support will be made from specially designed refractory material to ensure free expansion of the heating section muffle during heating.
At the exit of heating section, cooling sections are provided to cool the material to near ambient temperature under protective atmosphere. In the cooling section, material will be indirectly air cooled, water cooled or forced-jet cooled depending upon the process requirement. The cooling system can also be a combination of all three if the process requires so.
At the entry and exit side of the furnace, specially designed purge sections are provided. They contain curtains made from high temperature materials, nitrogen gas curtain and flame curtain. This section ensures that there is no outside atmosphere interference in the furnace atmosphere.
A dedicated control panel is provided to ensure trouble free operation of the furnace. It houses variable speed drive, PID controllers and thyristor power controller, data logger, dew point meter and oxygen analyser. The data logger will store temperature data of all zones, dew point and oxygen PPM level for future reference and trouble shooting.
2. Annealing/ Annealing under protective atmosphere
4. Stress Relieving
5. Debinding/ Delubing / Dewaxing
6. Pre sintering
8. Pre Heating
9. Pre Heating for forging