Kneading apparatus

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 kneading extruder, said kneading extruder comprising:

• a barrel having a chamber, said chamber being a tubular hollow;
• a biaxial screw set, said biaxial screw rotating for extruding the material to be kneaded downstream inside said chamber;
• and
• a kneading blade section mounted in said screw set for kneading the material to be kneaded by shearing the material in tip clearances and a wedge-shaped space between an inside wall of said chamber and said kneading blade section, wherein the tip clearances become progressively narrower from the upstream side to the downstream side in the direction of extrusion of the material,
• wherein said kneading blade section comprises a helical blade having a partly cut away top portion and a length in the axial direction which is equal to or greater than the outside diameter of said screw set, and said kneading blade section is, at the downstream side, adjacent to another segment member having a portion whose axial cross sectional form changes discontinuously, wherein said another segment member adjacent to said kneading blade section at the downstream side has a length in the axial direction which is equal to or greater than ½ of the outside diameter of said screw set, and wherein a plurality of segments having blades whose top portions are parallel to the axis of said screw set are combined so that their axial cross sectional forms are alternately shifted by 90° from the axial center of said screw set.

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 kneading extruder, said kneading extruder comprising:

• a barrel having a chamber, said chamber being a tubular hollow;
• a biaxial screw set, said biaxial screw rotating for extruding the material to be kneaded downstream inside said chamber;
• a kneading blade section mounted in said screw set for kneading the material to be kneaded by shearing the material in tip clearances and a wedge-shaped space between an inside wall of said chamber and said kneading blade section, wherein the tip clearances become progressively narrower from the upstream side to the downstream side in the direction of extrusion of the material;
• a pusher for forcefully supplying the material to be kneaded into said chamber;
• and
• a removably provided connecting mechanism for connecting said pusher and said barrel, said connecting mechanism having a supply opening member integrally or separably formed thereat, said supply opening member having the plurality of supply openings opening in the vicinity of a blade of said screw set,
• wherein said connecting mechanism has said supply opening member separably formed thereat, and has a supply path member which is interposed between said supply opening member and said pusher and which can be divided into a plurality of parts parallel to a direction in which the material to be kneaded flows.

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 kneading extruder, said kneading extruder comprising:

• a barrel having a chamber, said chamber being a tubular hollow;
• a biaxial screw set, said biaxial screw rotating for extruding the material to be kneaded downstream inside said chamber;
• a kneading blade section mounted in said screw set for kneading the material to be kneaded by shearing the material in tip clearances and a wedge-shaped space between an inside wall of said chamber and said kneading blade section, wherein the tip clearances become progressively narrower from the upstream side to the downstream side in the direction of extrusion of the material;
• a pusher for forcefully supplying the material to be kneaded into said chamber;
• and
• a removably provided connecting mechanism for connecting said pusher and said barrel, said connecting mechanism having a supply opening member integrally or separably formed thereat, said supply opening member having the plurality of supply openings opening in the vicinity of a blade of said screw set,
• wherein a barrel-side end surface of said supply opening member is within 0.3 mm outward from an inside surface of said barrel.

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 kneading extruder, said kneading extruder comprising:

• a barrel having a chamber, said chamber being a tubular hollow;
• a biaxial screw set, said biaxial screw set comprising two screw sets rotating for extruding the material to be kneaded downstream inside said chamber;
• and
• at least two kneading blade sections mounted in each said screw set in an array of separate sections arranged along a direction of extrusion of the material and comprising means for kneading the material to be kneaded by shearing the material in tip clearances and a wedge-shaped space between an inside wall of said chamber and said kneading blade section, wherein the tip clearances become respectively narrower from one of said kneading blade sections to the next kneading blade section for all of the at least two kneading blade sections, as taken from an upstream side to a downstream side in the direction of extrusion of the material,
• wherein for each of said at least two kneading blade sections, the tip clearances in said kneading blade section become narrower from an upstream side of the kneading blade section to a downstream side of the kneading blade section in the direction of extrusion of the material.

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 kneading extruder, said kneading extruder comprising:

• a barrel having a chamber, said chamber being a tubular hollow;
• a biaxial screw set, said biaxial screw set comprising two screw sets rotating for extruding the material to be kneaded downstream inside said chamber;
• and
• at least two kneading blade sections mounted in each said screw set in an array of separate sections arranged along a direction of extrusion of the material and comprising means for kneading the material to be kneaded by shearing the material in tip clearances and a wedge-shaped space between an inside wall of said chamber and said kneading blade section, each of said kneading blade sections having a low tip section and a high tip section,
• wherein the tip clearances in the low tip section become respectively narrower from one of said kneading blade sections to the next kneading section for all of the at least two kneading blade sections, as taken from an upstream side to a downstream side in the direction of extrusion of the materials,
• wherein each of said at least two kneading blade sections has a rotor segment having a twist angle to extrude the material to be kneaded downstream, and said at least two kneading sections are different in the twist angle.

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 kneading extruder, said kneading extruder comprising:

• a barrel having a chamber, said chamber being a tubular hollow;
• a biaxial screw set, said biaxial screw set comprising two screw sets rotating for extruding the material to be kneaded downstream inside said chamber;
• and
• at least two kneading blade sections mounted in each said screw set in an array of separate sections arranged along a direction of extrusion of the material and comprising means for kneading the material to be kneaded by shearing the material in tip clearances and a wedge-shaped space between an inside wall of said chamber and said kneading blade section, each of said kneading blade sections having a low tip section and a high tip section,
• wherein the tip clearances in the low tip section become respectively narrower from one of said kneading blade sections to the next kneading section for all of the at least two kneading blade sections, as taken from an upstream side to a downstream side in the direction of extrusion of the material,
• wherein each of said at least two kneading blade sections has a rotor segment having a twist angle to extrude the material to be kneaded downstream, and said at least two kneading sections are different in the twist angle.

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 kneading extruder, said kneading extruder comprising:

• a barrel having a chamber, said chamber being a tubular hollow;
• a biaxial screw set, said biaxial screw set comprising two screw sets rotating for extruding the material to be kneaded downstream inside said chamber;
• and
• at least two kneading blade sections mounted in each said screw set in an array of separate sections arranged along a direction of extrusion of the material and comprising means for kneading the material to be kneaded by shearing the material in tip clearances and a wedge-shaped space between an inside wall of said chamber and said kneading blade section, wherein the tip clearances become respectively narrower from one of said kneading blade sections to the next kneading blade section for all of the at least two kneading blade sections, as taken from an upstream side to a downstream side in the direction of extrusion of the material,
• wherein each of said at least two kneading blade sections has a rotor segment having a twist angle to extrude the material to be kneaded downstream, and the twist angle of the upstream side is larger than the twist angle of the downstream side in each of said at least two kneading sections.

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 kneading extruder, said kneading extruder comprising:

• a barrel having a chamber, said chamber being a tubular hollow;
• a biaxial screw set, said biaxial screw set comprising two screw sets rotating for extruding the material to be kneaded downstream inside said chamber;
• and
• at least two kneading blade sections mounted in each said screw set in an array of separate sections arranged along a direction of extrusion of the material and comprising means for kneading the material to be kneaded by shearing the material in tip clearances and a wedge-shaped space between an inside wall of said chamber and said kneading blade section, each of said kneading blade sections having a low tip section and a high tip section,
• wherein the tip clearances in the low tip section become respectively narrower from one of said kneading blade sections to the next kneading section for all of the at least two kneading blade sections, as taken from an upstream side to a downstream side in the direction of extrusion of the material,
• wherein each of said at least two kneading blade sections has a rotor segment having a twist angle to extrude the material to be kneaded downstream, and the twist angle of the upstream side is larger than the twist angle of the downstream side in each of said at least two kneading sections.