The paper presents modelling proposal of the curvilinear scraper arm geometry by means of Bezier' s curve of the third degree. A physical model of scraping process of the unit load with the use of curvilinear arm for the most difficult sorting cases has been worked out. As a result of the performed numerical optimisation, there has been proposed the scraper arm shape geometry that makes it possible to decrease dynamic interaction exerted on the sorted loads.

The authors present a proposal for modelling the process of scraping of load units (packages) from sorting belt conveyors with the use of deflection scrapers. The continuous scraping process was subjected to discretisation. Characteristic stages of the process were distinguished, such that determine different kinematics-dynamic properties of the load. The created model makes it possible to test the scraping process, and to optimise it.