Research On Rubber Continuous Mixing Mechanism And Experiment

At present, the mixer is the most important and critical mixing processingequipment in the rubber industry, especially in the tire manufacturing. The quality ofits gross rubber directly determines the quality of the tires. Admittedly, the presenttechnology of internal mixer is already very mature, but it also has shortcomings thatcan not be avoided. Such as each batch of gross rubber has the uneven quality, themixing process has high energy consumption, intermittent processing results in heatloss, and mixing-assisted system is relatively complex. Rubber continuous mixerdoes not have the drawbacks, which the mixer and other intermittent processingequipment can not overcome. This makes the continuous mixing technology tobecome the key directions of domestic and foreign scholars in recent years. Afterdecades of exploration, the level of continuous compounding technology at homeand abroad has been greatly improved; there have been various types of rubbercontinuous mixer. However, the existing continuous mixing equipment has a mostmajor flaw that it requires the feeding of the original plastic material must begranular or powdered rubber can not achieve the continuous mixing of the block ofrubber, which seriously hampered the development and industrial promotion ofcontinuous mixing equipment. After nearly three years of effort, the Task Force haddeveloped a set of new applicable continuous mixing equipment, which can mixblock rubber, and rubber continuous mixer and technology breakthroughs. Thispaper studies the mechanism of rubber continuous mixing, as well as the structure ofthe machine design and experimental performance testing, this article has done themain work is as follows:1. Through access to a large number of related documents and information, thisarticle simply summarized domestic and international rubber development of thecontinuous mixer. The physical and mathematical models had been established, and a new mechanism of rubber continuous mixer had been established by studying thegel changes in the processing of continuous mixing.2. Our group had developed continuous mixing equipment for block rubber, andinnovated in the structural design of the rotor and barrel. Continuous mixer rotor tolearn the advantages of the mixer meshing rotor and shear rotor, and we haddeveloped the equipment corresponding components according to their structuralcharacteristics, and introduced the new structure of the big lead and toothcomponents. The barrel split structure to facilitate the analysis of the state of themachine barrel plastic material during the experiment.3. A lot of rubber continuous mixing experiments had been done using theformula of tread compound. The best of the rotor structure and combination hadbeen found by changing the rotor structural component types and the position of therotor structural elements. And in accordance with the shortfall in the experiment, andanalysis of experimental results, we had developed a new type of rotor structuralelements, and completed a series work of equipment optimization, improvement andinnovation.4. Through the rubber continuous mixing experiment and intermittent mixingexperiments, the quality of gross rubber, the uniformity between each batch, energyconsumption, production capacity and production efficiency were compared. Andthe main factors that influence these performance indicators were analyzed,including the rotor speed, processing temperature and rotor configuration. And thebest continuous mixing process parameters had been found, that’s rotor speed30r/min,the barrel temperature80℃and the rotor configuration Ⅲ.