Patent ID: 9707527
Date: 2017-07-18
CPC Classifications: B01F

Claim:
1. A kneading apparatus for kneading an object to be kneaded by rotating two rotary shafts that are disposed in parallel and rotate at unequal speeds in opposite directions to each other, and paddles as kneading members being disposed on the respective rotary shafts in a facing manner so as to be arranged helically with an inverse helix from each other at a predetermined helical pitch and at predetermined angular pitch intervals, wherein a helical pitch ratio of the paddles on the rotary shafts is set so as to be the inverse of a rotational speed ratio of both the rotary shafts and an angular pitch ratio so as to be the same as the rotational speed ratio thereof; wherein all of the paddles of both of the rotary shafts have the same shape and size and are cubic paddles each having on right and left sides surfaces extending parallel to the axis of the corresponding rotary shaft, on front and rear sides surfaces perpendicular to the axis thereof, and on upper and lower sides surfaces extending parallel to the axis thereof; wherein the surfaces on the right and left sides of the paddles are concavely curved to form curved surfaces, and both of the rotary shafts are disposed in proximity to one another so that, when rotated, the upper side surface of each of the paddles on one of the rotary shafts can enter into the curved surfaces formed on the right and left surfaces of the facing paddle on the other of rotary shafts without any contact therewith; wherein the paddles are detachably mounted to a corresponding rotary shaft such that their right and left side surfaces are parallel to the axis of the rotary shaft and their front and rear surfaces are perpendicular to the axis thereof; and wherein the paddles are longer in length along the axial direction than in length along the rotational direction.