THE FEEDING APPARATUS AND METHOD IN SPIRAL ENGAGEMENT OF EXTRUDER

摘要

The present invention relates to a feeding method and apparatus for the extruder which is used for processing of rubber, plastic and cellulose etc. The feeding apparatus comprises an inlet, through which the materials enter the apparatus; a screw for transferring the materials from the inlet by rotating, which has threads and extends along the direction of transferring materials; a feeding roller set in the inlet which has threads and extends along the direction of transferring materials. The threads of the screw and the roller are engaged untightly. The method comprises: setting up a feeding roller in the inlet, the roller extending along the direction of transferring materials and having threads which mesh with the threads of the screw; making the threads of the roller engage with the threads of the screw untightly; making the roller and the screw rotate in opposite directions when the extruder works.