Box Feeder is one of feeder's equipments which balances and rations the materials feed in. By adjusting the height of flashboard and the speed of conveyor belt, it will control the quantity of feed-in raw materials, balance pug and internal combustion material proportionally, and crush the large soft clay. Our company has step-type plate box feeder, step-type belt conveyor box feeder, continual belt conveyor box feeder and other form and specification box feeders which can apply for different material and specification Vacuum Extruder.