Extrusion International 2-2025

42 Extrusion International 2/2025 FILM EXTRUSION, DIGITALISATION Agglomeration, Desiccation, Crystallization Agglomeration systems are a highly ef cient solution that is in constant demand for achieving free- owing regrind with a high bulk density that can be directly processed in extruders or injection molding machines. And with Plastcompactors from Herbold Meckesheim, even complex intermediate steps can be saved when reprocessing recycled PET: The agglomerate does not require any special silos for storage as it can be easily discharged and conveyed, unlike classic akes. In addition, the recycled PET is already partially crystallized through the agglomeration. A ll in all, the material is much easier to handle and therefore more suitable for further process- ing steps in preform injection mold- ing machines or lm extruders with gravimetric dosing. Furthermore, the speci c energy requirement for the extrusion of compacted plastics is lower and the throughput higher. The Plastcompactor HV 70 is the most powerful of the series from Herbold Meckesheim. It compress- es the feedstock in continuous op- eration between a rotating and a stationary disk that are equipped with bolt-on and easily replaceable kneading bars. A stepless adjust- able feeding screw constantly con- veys granulated material from the buffer silo into the working zone through the center of the stator disk in a controlled manner. Since the rapidly warmed material leaves the compacting zone within fractions of a second, the thermal impact on the plastic is extremely low. The process is regu- lated by two degrees of free- dom – the speed of the screw and the distance between the discs. The HV 70 Plastcompactor is the most powerful of the series from Herbold Meckesheim (All pictures: Herbold Meckesheim) Agglomeration plant for bers, nes, tapes, foams, lms, powders or shavings