Deformation of material between rotor edge and chamber wall

3 Deformation of material between rotor edge and chamber wall 

The material in front of the rotor is pushed in directions dictated by the geometry of the rotor blades and the chamber wall. The material movement is in both axial and lateral directions, resulting in kneading and cutback. However, the material sufficiently close to the front of the rotor edge may be modelled independently from the other part of the chamber. This approximation is reasonable on the basis of visualisation and a sharp rise of the pressure, which appears to be essentially independent of the pressure generated from other parts of the rotor [12]. 

Whether the particles of rubber break only once or more than once, whether every particle breaks or only a fraction of particles break, and whether one particle breaks in approximately half or not are the questions to be answered in the future. For this purpose, the use of powdered rubber, especially when a portion of it is dyed, may be very useful. 

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