Extruded finned tube, as an important heat exchange device, has been widely used because of its unique structure and manufacturing process. 

The device uses a special extrusion process to tightly attach the fins to the base tube, forming an efficient heat-transfer structure. 

The working principle of extruded finned tubes begins with their unique extrusion forming process. In the extrusion machine, the pre-treated material is fed into the extrusion mold, 

the mold is designed to match the shape of the fin cavity, the material is formed under the action of strong extrusion pressure. 

This process requires precise control of parameters such as extrusion pressure, temperature and speed to ensure fin size and surface quality.

When the extrusion fin tube works, the hot fluid flows in the tube, and the cold fluid flows between the fins, due to the existence of the fin, 

the heat transfer area outside the tube is greatly increased, so that the heat can be transferred to the fin more quickly, the fin material usually has good thermal conductivity, 

so the heat can be transferred quickly from one end of the fin to the other end. At the same time, the air flow between the fins also contributes to the rapid transfer and diffusion of heat.

Extruded finned tubes have many advantages. First of all, due to the existence of fins, the heat transfer area is greatly increased and the heat exchange efficiency is improved. Secondly,

 the connection between the fin and the base tube is tight and the thermal conductivity is good, ensuring that the heat can be transferred and diffused quickly. 

In addition, the extruded finned tube also has the advantages of simple structure, easy manufacture and installation.

To sum up, the extruded fin tube is a heat exchanger with excellent performance and wide application, and its unique structure and manufacturing process make it play a vital role in various industrial fields.

 With the continuous development and progress of industrial technology, the design and manufacturing technology of extrusion finned tube is also constantly updated and optimized, 

and the future application prospect is broad.