Patent ID: 8721312

Claim:
A kneading extruder comprising: a barrel including a first raw material supply port through which a first raw material is supplied, a second raw material supply port through which a second liquid raw material is supplied, and a barrel extrusion port through which kneaded material including the first raw material and the second raw material in a melted state is extruded from inside of said barrel, said second raw material supply port being located downstream of said first raw material supply port; a screw shaft in said barrel, said screw shaft being configured to knead the first raw material and the second raw material to produce the kneaded material in the melted state; a screw driving device configured to continuously rotate said screw shaft at a constant speed; a die communicating with said barrel extrusion port, said die having a die extrusion port through which the kneaded material in a pressurized state extruded through said barrel extrusion port is extruded to outside of said kneading extruder; a first gear pump for ejecting a portion of the kneaded material extruded through said barrel extrusion port, said first gear pump being located between said barrel extrusion port and said die; a first ejection quantity regulating unit for changing a quantity of rotations of said first gear pump to regulate a quantity of the portion of the kneaded material ejected by said first gear pump so that a pressure of the kneaded material between said barrel extrusion port and said die is maintained constant; a booster pump for boosting the pressure of the kneaded material, said booster pump being located between said barrel extrusion port and said die; a second gear pump for ejecting a portion of the kneaded material supplied into said die; and a second ejection quantity regulating unit for changing a quantity of rotations of said second gear pump to regulate a quantity of the portion of the kneaded material ejected by said second gear pump so that the pressure of the kneaded material at said die extrusion port is maintained constant.