Patent ID: 6299340
Filing Date: 2001-10-09
Classification: B29B,B29C,B30B

Abstract:
A feeding method for an extruder of a single screw type that includes a feeding apparatus said feeding apparatus comprising: a cylinder having a material outlet and a material inlet formed thereon, wherein materials enter the feeding apparatus through the inlet; a screw received in the cylinder and extending along a transfer direction of the materials, said screw having helical flights for transferring materials fed from the inlet by rotating along said cylinder, said method including the steps of:providing at the inlet a cylindrical feeding roller, which extends along the transfer direction of the materials, has feeding roller helical flights which can mesh with the helical flights of the screw, has a portion along its axial length having said feeding roller helical flights, and has two journals, said feeding roller being located adjacent the inlet, the axial length of the portion of the feeding roller having said feeding roller helical flights being substantially equal to the length of the inlet in the axial direction of the feeding apparatus, and the two journals of the feeding roller being supported by two bearings mounted in a base;loosely engaging the helical flights of the feeding roller with the helical flights of the screw; androtating the feeding roller and the screw in opposite directions to move materials from said inlet down said screw in the transfer direction.