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This paper presents a novel concept for an extruder to be used with plastics and polymer
composites, especially in the food industry. The design solutions include a grooved feed section
with adjustable geometric parameters, which makes it possible for dynamic adjustment of the
depth, inclination angle and number of grooves used for granulate transport during continuous
operation of the machine. The proposed grooved feed section concept facilitates optimum
performance, and is adjustable to suit the general parameters of production. The scope of our study
also included the numerical strength and thermal analysis of the designed grooved feed section,
conducted using the finite element method. Numerical calculation involved a coupled temperature-
displacement analysis which constituted a geometrically and physically non-linear problem. The
results corroborated the achievement of satisfactory strength for the structural elements of the
grooved feed section in the extruder and demonstrated the suitability of the adopted solution in
terms of temperature distribution in the parts of the machine, as well as the correct concept of the
designed cooling system. The numerical tool used was the ABAQUS® commercial program.
