Кафедра Галузеве машинобудування ДМетІ (з 2022 р. утворилась шляхом з'єднання кафедри Колісних і гусеничних транспортних засобів та кафедри Машини та агрегати металургійного виробництва)

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ENG: Faculty of Machine Design and Environmental Protection Dnipro Metallurgical Institute

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    Selection of Rubber Compound Type for the Manufacture of Elements of a Self-Cleaning Grate-Panel Screen for Vibrating Sieves
    (M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine, Dnipro, 2025) Pelykh, Ihor; Kononov, Dmytro O.
    ENG: In laboratory conditions, domestic rubber compound was experimentally selected whose technical characteristics most closely correspond to the operating requirements of the elastic rubber components designed for a dynamically active self-cleaning grate-panel screen of a vibrating sieve. The technical development — a screening surface — can be applied for particle size classification of abrasive and cohesion-prone bulk materials, such as crushed stone, granite, slag, blast furnace coke, limestone, or wet sand with clay impurities. The intensification of the screening process on the self-cleaning grate-panel screen is achieved by complex spatial oscillatory displacements of the peripheral sections of the horizontal shelves of the elastic rubber grate-panel elements, which directly form the screen cloth. These elements are rigidly fixed into the grooves of longitudinal grate-like supports of the screening surface without preliminary deformation. The choice of the optimal type of rubber compound, as the raw material for subsequent manufacturing of rubber elements for the self-cleaning grate-panel screen, is based on determining and further analyzing the principal standard physico-mechanical parameters measured on full-scale samples of rubber products. In particular, during laboratory studies, the following technical indicators were identified and calculated: relaxation coefficient, residual elongation, dynamic modulus of elasticity, and energy absorption coefficient. As a result of the comprehensive laboratory investigations on groups of full-scale rubber product samples fabricated from parametric series of five domestic rubber compounds, compound 2959 was recommended for further application. This compound is suitable for vulcanization-based production of grate-panel rubber elements that directly form the screen cloth of the self-cleaning grate-panel screen of a vibrating sieve. When manufacturing rubber elements from compound 2959 by pressing, it is recommended to introduce a technological mode of vulcanization, thanks to which their Shore A hardness indicators would be achieved to the maximum possible values.