Kobe Steel, Ltd.

Masaaki Uemura

Kazuhisa Fukutani

Kimio Inoue

Katsunobu Hagiwara

Hiromi Nakano

Mika Nishida

Norifumi Yoshida

Yasuaki Yamane

Norifumi Yamada

Yusuke Tanaka

A mixing rotor includes: a rotor shaft portion that includes a cooling passageway formed therein, and a mixing blade portion that is formed in an outer circumferential portion of the rotor shaft portion, wherein each of the long blades of the mixing blade portion includes a land portion as an end surface of the long blade facing a radially outside of the mixing rotor, a length of each of the long blades in the axis direction is set to be 0.6 times or more as large as a length of the mixing blade portion in the axis direction, a biting angle of each of the long blades is set to an angle equal to or smaller than 31&#xb0;, and a center angle with respect to a land width as a width of the land portion in the cross-section of each of the long blades orthogonal to the axis direction is set to an angle equal to or larger than 7&#xb0;.

Mixing rotor and internal mixer

Provided is a kneading rotor, a batch kneader and a method of kneading materials capable of obtaining kneaded materials with higher quality in comparison to conventional kneaded materials when the materials to be kneaded are kneaded in a high temperature state. The kneading rotor comprises a rotor portion which is disposed in a kneading chamber of a chamber of a batch kneader, and applies shear force, by using a plurality of kneading blades, to materials to be kneaded which pass through a tip clearance. A first long blade of the plurality of kneading blades has an apex for forming, with the inner surface of the chamber forming the kneading chamber, three-staged tip clearances of different sizes configured from a combination of a large tip clearance, a mid tip clearance that is smaller than the large tip clearance, and a small tip clearance that is smaller than the mid tip clearance so as to be arranged in the longitudinal direction of the first long blade. Each of a second long blade, a first short blade and a second short blade of the plurality of kneading blades has an apex for forming, with the inner surface of the chamber forming the kneading chamber, a tip clearance of a size that is larger than or equal to the small tip clearance and smaller than or equal to the large tip clearance.

Kneading rotor, batch kneader and method of kneading materials

A kneading rotor, in which the length Lof a long blade in the direction of rotation of a rotor section is greater than one half of the total length Lof a rotor section main body in the direction of rotation, and the long blades are arranged in such a manner that, in a case where a pair of the rotor sections are arranged mutually in parallel inside the chamber of the closed kneading machine and are rotated in mutually opposite directions, an end section on the rearward side in the direction of rotation of the rotor section, of the long blade of one of the rotor sections, and an end section on the forward side in the direction of rotation of the rotor section, of the long blade of the other one of the rotor sections, alternately repeat mutually an approaching action and a separating action, and in the state of approach, the end section on the forward side and the end section on the rearward side oppose each other in the direction of rotation of the rotor sections on a line which links the respective central axes of the pair of rotor sections, in one cross-section perpendicular to the axial direction of the rotor section.

Closed kneading machine and kneading rotor

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Takasago, Japan

Masaaki Uemura