Design and test of key components of 1MSD-1.1 residual plastic film collector

Plastic film mulching cultivation technology is widely used in China, but it is not easy to be collected. The accumulated residual plastic film in farmland soil in China has exceeded 1 million tons. In order to improve the collection efficiency, mechanical collection is imperative. Aiming at the problem that it is difficult to collect the old residual plastic film in the soil tilth, 1MSD-1.1 residual plastic film collector was designed and developed. The machine was designed with a two-level residual plastic film collection mechanism to collect the surface film and deep residual film respectively. In this paper, the key components and parameters were designed and calculated. According to the design expectation, the forward speed of the collector, depth of the excavation, and the rotation speed of the drum type residual film pickup mechanism were taken as the test factors, and the surface cleaning rate, deep cleaning rate, and film wrapping rate were taken as the target values. The Box-Behnken test with three factors and three levels was conducted. After that, the operating parameters were optimized by Design-Expert. The optimal results was 84.97% surface cleaning rate, 79.06% deep cleaning rate and 10.32% film wrapping rate. It was found that too much excavation depth was not conducive to the collection of residual film. Before operation, the distribution of residual film depth in the operation area should be determined first before the operation begins.