DESIGN AND EXPERIMENTAL STUDY OF A RESIDUAL FILM BALING DEVICE
Abstract
To address the problems of low bale-forming rate and loose compaction during the mechanized recovery of residual plastic film in farmland, a three-stage residual film baling device was developed. Based on the discrete element method (DEM), a flexible thin-shell model of the residual film was established, and dynamic simulation and parameter optimization of the baling process were carried out using Rocky DEM software. Combined with single-factor experiments and response surface methodology, the effects of baling chamber inclination angle, belt type, belt linear speed, and upper belt inclination angle on bale integrity and compaction were analyzed. The results showed that the bale-forming rate of the three-stage device reached 99.13%, and the bale density reached 83.75 kg/m³ under the optimal conditions: baling chamber inclination angle of 30°, upper belt inclination angle of 30°, belt linear speed of 2.3 m/s, and the use of a rough-surface belt. Field validation tests showed that the average density of the residual film bales was 91.4 kg/m³, with a prediction error of only 2.23 kg/m³ compared with the simulation results. The device operated stably and reliably. This study presents a high-efficiency residual film baling device with improved bale-forming rate and compaction performance through structural optimization and parameter tuning, providing technical support for efficient recovery and pollution control of residual plastic film in farmland.
