The double roll extrusion machine is a type of industrial equipment that uses two rolls to extrude and melt polymers. The operation of this machine can be explained as follows:

Firstly, when the raw materials are fed into the machine from the input port, they are mixed with each other through the mixer.

Secondly, these mixed materials flow under the pressure of the air pump to pass through the first roll of the machine. At this time, the material will be heated and melted by the heat source inside the machine.

Thirdly, after passing through the first roll, the material continues to move under the pressure of the air pump to enter the second roll of the machine. The material in the second roll is also heated and melted during the extrusion process. Finally, the melted material is extruded out of the machine and can be used for various purposes.

In summary, the operation of the double roll extruder machine involves mixing, heating, melting, and extruding processes. It plays an important role in the production of various plastics and synthetic fibers.