Function
Process description
In the extruder (3) the material is plasticised. Then the melt is evacuated from the extruder and passed on to the melt filter (4). In the automatic, self-cleaning melt filter the melt is cleaned and returned to the extruder to be then passed on to the downstream degassing zone (5) of the extruder.
Downstream of the degassing zone the melt is directly conveyed (7) to the respective tool (8) (e.g., die face granulator) via a short discharge zone (no additional melt filter required).
* DD configuration:
*DD stands for "Double Disc" Technology and refers to the separation of the working steps "material processing" (shredding, drying, preheating, compacting) from the step "extruder feeding" in the cutter compactor. The result is an extremely uniformly fed and evenly operating recycling extruder which constantly performs at its best, regardless of external factors (e.g. feed portion size, moisture etc.).
Between the plasticising and the degassing zone of the extruder the screw is sealed off by means of a patented dynamic back flow thread (6), which is continuously flushed (counterflow) with a small quantity of cleaned melt. This ensures that the processed polymer does not deposit in the area of the seal. Via optional pressure difference measurement the function of the seating can be continuously supervised.
