Mathematical modelling of the device for preliminary cuttings of container from polyethylene terephthalate during loading in the rotor crusher

Проведено аналіз недоліків роботи роторних дробарок під час подрібнення тари з поліетилентерефталату і доцільність їх оснащення додатковим різальним пристроєм валкового типу. Представлено математичне моделювання взаємодії валків з відходами тари. Визначено умови захвату стиснених пляшок валками і визначено їх мінімально необхідний діаметр.An analysis of the defects of the work of rotary crushers during the molding tare from polyethylene terephthalate and the expediency of their equipment with an additional cutting device of roll type have been made in this work. After the implementation of experimental studies, the design of the rotary crusher was improved by equipping it with a roller type device for deformation and preliminary cutting of used thin-walled tanks of large volume. The mathematical modelling of the interaction of rolls with packaging waste is presented. Conditions of capture of compressed bottles by rolls are determined and their minimum diameter was determined. Also in the process a deformation and cutting of the thin-walled capacities of large volume were first examined by the profiled roller mechanism with disk knives. The purpose of the research is to improve the design of the rotary crusher by equipping it with a roller device for deformation and preliminary cutting of used thin-walled tanks of large volume. The task of the work is an analytical and experimental study of the efficiency of the destruction of thin-walled capacities of large volumes by roller mechanism, and the development of its design. The object of the study is the process of crushing polymer waste in rotary crusher. The subject of the study is rotary crushers with roller loading mechanism. The methodological and theoretical basis of the study are the main provisions of the theoretical mechanics, the resistance of materials and parts of machines