Rubber Industry Powder Automatic Weighing System Design And Experimental Study

Mixing different materials according to a certain ratio is a common production process in many industries and is also the initial process of the production. The quality of burdening has a direct impact on the downstream processes and product quality. Rubber industry needs a variety of auxiliary chemicals(known as little material) in the rubber mixing process ,These auxiliary chemicals are mainly accelerator, zinc oxide, light magnesium oxide, antioxidants, calcium carbonate, resin, anti-coke etc dozens of powder. Weighing powders according to formula is the key to ensuring product quality, the accuracy of these powders are often in grams (g) to weigh .With the continuous development of the social industrial automation, automatic material weighing system to replace manual weighing ingredients has become need of the times. View of this, the automatic weighing of the powder materials were studied and discussed the mechanism. A oval Automatic weighing system has designed in accordance with the needs of the tire industry and its experimental verification.First, the paper describes the powder which is the object of the automatic weighing system designed, and conducts study on the influence of mobility on the powder properties such as particle shape, size, agglomeration of powders and so on to direct program development and the component system unit to be designed.Based on the status of automatic weighing system in the rubber tire industry, the paper determines the new annular design of automatic weighing system including one weighing station program, the system of dust removal program, the powder box conveying line and the control system scheme trying to resolve the existence of bin end arch, low accuracy and efficiency and other shortcoming in the current weighing system .The paper studies the mechanism of flow of powder in the silo,and based on powder flow mechanism, determines the powder flow pattern of the silo,open aperture, warehouses , wall angle and other important parameters ,and designs a variety of broken arch ways, different materials choose the compatible broken arch way. System uses a single-station single dust removal to avoid mixing powder, and the powder collected can be used again. Then unpacking device, storage warehouses, feeder, filter, weighing equipment, powder conveying line and other parts are designed. In the design process the pneumatic system was energy optimized designs to reduce the energy consumption of the system.To validate rationality and reliability of the system designed, After the system installation the paper implements experiment on the feeder performance and weighing accuracy and efficiency using the system designed .Weighing accuracy and efficiency of the system achieves the desired design objective.Finally, this article summarizes the research work presented, put forward some ideas on the future development of powder automatic weighing system.