Getting an evaluation of the power requirement while designing the whole device allow you to acquire the appropriate material. Furthermore, both the cost and the mixing quality will depend on the geometry of the barrel and the moving impellers or screws, the flowing material and the operating conditions. All these parameters can be modified on the computer in order to select the best operating window. The combination of non-isothermal simulation and long geometries typical for a screw requires the use of appropriate interpolation techniques in order to keep the computational time low enough. The goal of the twin screw extruder is both to convey the melted material and to mix the flowing resin together with additives or tyres, by far its most important task.
Melted material enters the barrel containing the twin screws.
Here, the resin flows around different screw elements such as conveying elements, kneading blocks, and reverse elements. At the interscrew region, a narrow, very complex flow section appears in front of the flowing particles. This will induce the shear and extensional flows that are required for the mixing quality. The Challenges Understanding the flow of material around rotating twin screws is critical. For batch mixers as well, the quality of the mixing created by the rotating impeller is critical to the quality of the final product.