Mesh belt heat treatment furnace

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1Product Details1

[Mesh belt heat treatment furnace]

CDOCAST mesh belt heat treatment furnace is mainly used for the welding, brazing, sintering or annealing processes of metal materials. It can also be used for welding jewelry, necklaces, and other workpieces. The mesh belt transfer design allows the entire annealing or welding process to be continuously working. and the entire heat treatment is carried out under the protection of inert gas to maximum prevent oxidation  An oxygen combustion device is installed at the furnace mouth to effectively prevent oxygen from entering the heating furnace. At the entrance of the furnace, all oxygen will be burned out

The rest half of the mesh belt furnace is the cooling zone, the workpieces which enter the cooling zone directly after heating.

Our mesh belt heat treatment furnace can be designed with a PID temperature control system, which means that the heating time, heating temperature, and cooling time can be set according to different heating requirements, the whole heating& cooling process can be automated performed as per programmed.

The following is a detailed description of the device:

1. Basic Structure

1. Mesh belt transmission system
– It is composed of high temperature resistant metal mesh belt (such as stainless steel, nickel-based alloy), which is responsible for carrying the workpiece through the furnace at a uniform speed.
– The mesh belt can adjust the speed (0.1-5 m/min) to meet different process requirements.
2. Furnace body partition
– Preheating zone: slowly heat up to avoid thermal shock.
– Heating zone: core welding area, the temperature can reach 300°C~1200°C (depending on the process).
– Cooling zone: control the cooling rate (air cooling/water cooling) to ensure stable material performance.
3. Heating system
– Electric heating (resistance wire, silicon carbon rod), gas heating or infrared radiation heating.
– Multiple temperature zones are independently controlled, and the temperature uniformity is within ±3°C.
4. Atmosphere control system
– Nitrogen (N₂), hydrogen (H₂) or mixed gas is introduced to prevent oxidation and improve welding quality.
5. Automatic control
– PLC or industrial computer integration to achieve temperature, speed, gas flow and other parameter monitoring.

2. Working Principle

1. The workpiece is continuously fed into the furnace through a mesh belt, and undergoes preheating, welding (high temperature), and cooling stages in sequence.
2. In the heating zone, the solder (such as solder paste, silver solder) melts and wets the substrate to form a reliable solder joint.
3. The protective gas reduces oxidation, and the cooling zone solidifies the solder joint through controlled cooling to avoid thermal stress cracks.

3. Typical applications

1. Electronics industry
– PCB reflow soldering (SMT chip component soldering), LED packaging.
2. Metal processing
– Stainless steel/aluminum alloy brazing (such as heat sinks, knives), powder metallurgy sintering.
3. Automobile manufacturing
– Sensors, motor windings, battery tab welding.
4. Photovoltaic industry
– Solar cell string soldering, preheating before component lamination.

4. Core advantages

1. Efficient and continuous production: 24-hour uninterrupted operation, suitable for large-volume orders.
2. Process controllability: precise control of temperature curve (such as the heating-constant temperature-peak-cooling curve of reflow soldering).
3. Energy saving and environmental protection: the closed design reduces heat loss, and the exhaust gas treatment system meets environmental protection standards.
4. Strong compatibility: different materials (such as lead-free solder and high melting point alloys) can be adapted by adjusting parameters.

As the core equipment of automated production, the selection and operation of mesh belt heat treatment furnace should be closely combined with specific process requirements. It is recommended to communicate in depth with the CDOCAST team to customize the furnace structure and control solution to maximize production efficiency and product yield.