Feed system for continuous supply of loose materials to an extruder comprises a side screw feeder through which material is drawn by an air flow and then separated from the air by a screen

摘要

Material to be supplied to the melt in the main extruder is sucked from a storage point into a twin screw side feeding unit (2). Air and material are separated by a screen (5) below the screws (4) and the air is extracted by a fan (8). Material to be supplied to the melt in the main extruder is sucked from a storage point into a twin screw side feeding unit (2). Air and material are separated by a screen (5) below the screws (4) and the air is extracted by a fan (8). Material on top of the screen is picked up by the screw flights and conveyed to the main extruder. A rotating paddle (3) above the screws continuously breaks up the material to prevent agglomeration. A cleaning system below the screen prevents blockage of the screen by material residues.