Tunnel furnace is a continuous industrial heating equipment mainly used for continuous heating, drying, curing or heat treatment of materials. The following are its core points:
1. Working principle
Heating method: Heat is generated through energy sources such as electricity, gas, or fuel, combined with thermal radiation and convection heating, to evenly heat the material as it passes through the furnace.
Material flow: The material is driven by transmission devices such as conveyor belts, chains, or mesh belts, and continuously passes through the preheating zone, heating zone, and cooling zone to complete the process treatment.
2. Structural characteristics
Furnace body: constructed with high-temperature resistant materials (such as stainless steel), with insulation layer inside to reduce heat loss.
Heating system: electric heating wire, gas burner or fuel nozzle, etc., with flexible selection of heating methods according to process requirements.
Transmission system: drives continuous movement of materials and supports automated production.
Control system: Accurate temperature control is achieved through PID controllers and sensors, and some devices support remote monitoring and data recording.
3. Application Fields
Electronic manufacturing: component drying, PCB board curing, chip packaging.
Food processing: baking bread and cookies, dehydrating meat, fruits and vegetables.
New energy: drying of lithium battery electrodes and sintering of photovoltaic materials.
Chemical/Materials: Powder coating curing, ceramic material sintering.
Other: Printing ink curing, textile drying, etc.
4. Industry advantages
Efficient continuous production: Compared to intermittent equipment, there is a significant increase in production capacity.
High temperature uniformity: The closed-loop control system ensures process stability.
High degree of automation: reduces manual intervention and improves production consistency.
Energy saving and environmental protection: Heat recovery technology reduces energy consumption, and exhaust gas treatment systems reduce emissions.