In Zamak Mercator LLC, in accordance with WP2, a seminar was held on 24 October 2017 in the scope of T2.2. The seminar was organized by ZAM and had a closed character. The seminar consisted of two parts. Before noon, during the seminar, the members of research teams from UMI, TUK, LUT and ZAM discussed the constructional concepts and technological possibilities of manufacturing the rotating barrel segments of a new extruder. The presentations included describing different concepts of a rotating barrel segment of the extruder. In all solutions, the technical possibilities of using the system of heating the barrel were discussed, as well as transferring the drive onto the rotating segment, ways of assembling, especially sealing, the rotating barrel segment with the stationary elements of the barrel of the extruder plasticizing system. Most of the solutions was presented in the form of virtual 3D models. In the afternoon, the workshops were held concerning twin screw extrusion using a twin screw, parallel, co-rotating extruder with segmental screws of the diameter 2 x 24 mm. The extruded materials were the composite consisting of powdered mineral fertilizer and adhesive in the form of PLA and glycerine as well as polyethylene with MDF flour (Medium-Density Fibreboard) and compatibilizer. The tests were conducted in the temperature 145 oC, at variable screw rotational speed in the range from 10 to 200 rev/min and variable content of the filler from 30 to 60%. During both tests the extrusion process was stopped and the barrel was opened in order to visually estimate the homogenization of the composite in the particular sections.
