1.Operating principle and scope of application Screw feeding machine sends the material to the screw spring with the axial thrust and centrifugal force produced by high speed rotation of the flexible screw spring, then with the material’s internal friction and the axial thrust produced by spring screws, push the material in axial direction and send it to destination, the delivery height is according to client’s requirement. This machine is mainly used for material delivery and feed to high altitude in pharmacy, chemical and food industry, it can be customized as needs, with characteristics of small room taking, good sealing performance, free dust, simple operation, labor saving and easy maintenance and cleaning.