Bulk bag unloaders from Brabender Technologie for lined or unlined bulk bags are modular discharge stations expandable from mere bulk bag dischargers to bulk ingredient metering stations. A unique discharge mechanism ensures uniform discharge and complete emptying-out even of poorly flowing ingredients. For off the bag metering the bulk bag unloaders are available with built-in metering feeders. If mounted on load cells, such units can be used as loss-in-weight feeders for gravimetric metering.