With the Easy Change variant of the Brabender FlexWallPlus Feeder with paddle-massage flexible PUR hopper, the hopper, screw, screw tube and casing of the model are designed as one replaceable feed unit. This unit can be lifted off the chassis inclusive of the residual ingredient after opening two quick-release locks. The drive motor and the paddle unit remain mounted in the chassis. The design does not only allow convenient cleaning of the ingredient-touched part outside the feeder but also reduces downtime for recipe change-over to a minimum if a replacement unit containing a new ingredient is used. The new feed unit is simply placed in the chassis and fixed by the quick locks. As motor and paddle agitation unit are only required once in the feeder chassis, the interchangeable feed units are very low-priced even if a greater number is stored with different ingredients. Of course the exchange units can also be adapted to other bulk ingredients and feed rates by interchanging the screws. A wide variety of single and twin screw modules is available.