Study on coupling vibration sorting parameters of waste plastic film and experimental verification

Abstract

The waste plastic film is seriously polluted and needs to be sorted and recycled. Vibration sorting of waste plastic film is a highly efficient sorting method at present. A new method for sorting waste plastic film was proposed: coupling vibration sorting. The dynamic interaction of thin film, bed surface and vibrating bed was researched. The nonlinear coupling vibration differential equation of thin film-bed surface-vibrating bed was established. It was found that the sorting distance between the two kinds of films under coupling vibration was 50% higher than that under uncoupling vibration, the validity of the model was verified. The influence of vibration frequency, eccentric block angle, longitudinal inclination angle and transverse inclination angle of the bed surface on the sorting effect in the coupling vibration sorting system were studied, and the vibration sorting trajectories of polyethylene film and polypropylene film under different parameters were obtained. The correctness of the theoretical model was verified by the adjustable vibration sorting experimental prototype. The experimental results show that the thin film-bed surface-vibrating bed coupling vibration sorting model can accurately simulate the thin film sorting law in the coupling vibration process, and the sorting effect of plastic film is improved. It lays a foundation for effectively improving the accuracy of waste plastic film vibration sorting and the optimization of sorting equipment.