Patent ID: 6890091

Claim:
A kneading apparatus for kneading by fluidizing a material to be kneaded under a shearing force to obtain a kneaded product in a desired kneaded state comprising: a barrel having a cylindrical cavity chamber, one end and another end; a double-screw screw set rotating in said chamber to knead the material to be kneaded under a shearing force and extrude the material to be kneaded to the downstream side; a plurality of kneading blades combined with said screw set, for kneading the material to be kneaded in a wedge-shaped space between the inner wall of said chamber and said screw set and in a tip clearance; a charging port provided at said one end of said barrel, for supplying the material to be kneaded into said chamber; discharge ports provided at a plurality of intermediate positions of said barrel between said one end and said another end, for discharging the kneaded product; and a discharge position selecting means for selecting only one of said plurality of discharge ports to be open so as to discharge the kneaded product from only a selected discharge port.