METHOD AND APPARATUS FOR MANUFACTURING SHORT FIBER- CONTAINING FORMED ITEM

摘要

PROBLEM TO BE SOLVED: To provide a method and an apparatus for manufacturing a short fiber-containing rubber formed item which can produce a cylindrical extruded item containing the short fiber orientated in a circumferential direction by giving the short fiber-containing rubber a stretch and a shear force gradually increasing toward a discharge aperture in the circumferential direction. SOLUTION: A cylindrical formed item containing a short fiber orientated in a circumferential direction is obtained by extruding a short fiber containing rubber by use of a conical inner die 9 having a diameter gradually increasing toward a discharge aperture connected to a mandrel 8, the inner die housed in an outer die 10 wherein the inner die 10 is rotated around the center of the axis to give the short fiber-containing robber a stretch and a shear force gradually increasing toward the discharge aperture 11.