INTEGRATION OF A VACUUM CHAMBER INTO A SINGLE-SCREW EXTRUDER FOR THERMAL VACUUM TREATMENT OF EXTRUDATES

Abstract

The article describes the design features and functional capabilities of a modernized single-screw extruder EC-40 equipped with a vacuum chamber at the die outlet. The aim of the study was to detail the equipment modification and demonstrate its effectiveness in controlling the structure of cereal extrudates. The research employed methods of engineering design, experimental processing of wheat starch, and visual analysis of the resulting products. It was established that the integration of a vacuum chamber enables the consistent production of expanded extrudates with an expansion ratio of up to 2.9 at a pressure of 10 kPa and exposure time of 1.1-1.2 s. The design features of the unit ensure precise control over vacuum treatment parameters and eliminate the need for extreme thermal conditions. The results confirm the technical feasibility of thermovacuum extrusion based on standard equipment and open opportunities for its industrial implementation. The novelty of the work lies in the successful integration of a vacuum zone into a compact screw system while maintaining high productivity.