The roller temperature of the open mill has an important effect on rubber mixing.
If the roller temperature is too high, there will be a variety of adverse consequences. One is to lead to the burning of rubber, that is, the early vulcanization of rubber in the mixing stage. This will make the fluidity of rubber worse, subsequent processing such as extrusion, calender and other molding operations difficult to carry out. The second is to excessively break the rubber molecular chain, reducing the physical properties of rubber, such as strength, elasticity, tensile properties, etc., will be weakened. For example, when making tires, the wear resistance and fatigue resistance of tires will be reduced.
If the roller temperature is too low, the plasticity of the rubber will be poor. This makes it difficult for the compounding agent to disperse evenly in the rubber, and it is easy for the compounding agent to cluster. Moreover, the viscosity of rubber increases at low temperatures, and greater shear force is required when mixing, which will not only increase energy consumption, but also extend the mixing time and reduce production efficiency. For example, in the production of rubber seals, the temperature is too low may cause the sealing performance of the seals to decline due to uneven mixing.
