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　　Production Process and Technology of Internal Mixer

　　The production process of an internal mixer involves several important steps and utilizes specific technologies. First, the raw materials, such as rubber, fillers, and additives, are prepared and weighed accurately according to the desired formulation. The quality and consistency of the raw materials are crucial as they directly affect the properties of the final compound.

　　The prepared raw materials are then loaded into the internal mixer. The mixer consists of a chamber with two rotors that rotate in opposite directions. The rotors have a specific design, such as a Banbury or an intermeshing type, which helps to thoroughly mix the materials. As the rotors turn, the materials are sheared, compressed, and kneaded together. The mixing process generates heat due to the friction between the materials and the rotors. To control the temperature, the internal mixer is equipped with cooling systems, such as water jackets or cooling coils.

　　During the mixing, the operator closely monitors the temperature, time, and power consumption. The temperature needs to be maintained within a certain range to ensure proper vulcanization and prevent premature curing or overheating of the compound. The mixing time is also critical and is determined based on the type of materials and the desired properties of the final product. The power consumption can provide an indication of the progress of the mixing and the rheological behavior of the compound.

　　Once the mixing is complete, the compound is discharged from the internal mixer. It may then go through further processing steps, such as shaping into sheets or pellets, or directly into a molding process like extrusion or injection molding. Quality control is an essential part of the internal mixer production process. Samples of the compound are taken and tested for various properties, including hardness, tensile strength, elongation, and viscosity. Based on the test results, adjustments can be made to the formulation or the mixing parameters to optimize the production process and ensure the production of high-quality rubber compounds.

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