PLAST-CONTROL developed a new intergrated solution for a cleaner gravimetric dosing process and a fully automated draining process for less materials wastage at order change.

PRO-CLEAN comes with a complete new design of the continuous working gravimetric hoppers and conveying system with the target to reduce cross contamination (or imperfections in the film surface). Dust and sometimes residue material remain in the dead zone areas and cause the need for a time consuming cleaning process.

PRO-CLEAN works with a new conical shape weighing hopper type to replace the classical “shut off valve design” with its huge dead zones.

The gravimetric hopper is filled completely in just one conveying step and due to the conical design, all internal hopper surfaces are continuously self-cleaned by flowing granules and help avoid material or dust to stick on the walls.

PRO-DRAIN is a further development which allows to clean all gravimetric dosing units at the end of an order. The remaining granules are transported into a separate bin with the aid of a vacuum system.

At the same time, synchronised compressed air pulses clean the dosing unit of dust and residue material left over in strategic areas of the weighing hopper.

PRO-DRAIN is powered by the new PLAST-CONTROL software MMC (“material minimizing control”), which calculates the minimum necessary amount of material needed to complete an order. Using MMC ensures the weighing hoppers are almost empty at the end of an order.

MMC in combination with PRO-DRAIN enables an automatic material change at the moment when a new order starts. As a result, time consuming manual draining and cleaning procedures are no longer needed.