Abstract: A kneading apparatus has two rotary shafts mounted to undergo rotation in opposite directions at unequal speeds. Cubic-shaped kneading members having the same shape and size are detachably mounted to the rotary shafts so as to be arranged helically with an inverse helix from each other at a predetermined helical pitch and at predetermined angular pitch intervals for kneading an object during rotation of the rotary shafts. Each kneading member has side surfaces extending parallel to a rotational axis of the rotary shaft and front and rear surfaces extending perpendicular to the rotational axis. The side surfaces of each kneading member is curved in the shape of a concave. The rotary shafts are disposed close to one another so that tips of the kneading members on one of the rotary shafts enter into the concave curved surfaces of the opposing kneading members of the other of the rotary shafts without the opposing kneading members contacting one another during rotation of the rotary shafts.

Abstract: A kneading apparatus has a housing and first and second rotary shafts mounted in the housing in parallel to one another for undergoing rotation about respective axes in opposite directions at unequal speeds to one another for kneading an object. The first and second rotary shafts have respective first and second stirring members arranged helically at a predetermined helical pitch and at predetermined angular pitch intervals, with the second stirring members being arranged with an inverse helix from that of the first stirring members. Side blocking plates disposed in the housing partially block the kneaded object and move it between the first and second rotary shafts. The side blocking plates are spaced apart from one another to provide a space above the first and second rotary shafts such that the kneaded object can pass through the space in the axial direction of the first and second rotary shafts.

Abstract: A plurality of paddles Pn (n=1 to 17) is provided on an external periphery of a rotary shaft 3 so as to be arranged helically at a predetermined angular pitch of 90°, and a plurality of paddles Qn is provided on an external periphery of a rotary shaft 4 so as to be arranged helically at a predetermined angular pitch of 72°. The rotary shafts 3, 4 are made to rotate in opposite directions at unequal speeds to convey an object to be kneaded in one conveying direction along the rotary shafts 3, 4 while being kneaded by the paddles. The paddle surfaces of the paddles have either a normal phase for advancing the kneaded object in a feed direction or a reverse phase, and the paddles are arranged so that phases cyclically repeat in the sequence “normal, normal, reverse” in the axial direction of the rotary shafts.

Abstract: A kneading apparatus has a pair of rotary shafts mounted to undergo rotation in different directions of rotation and at different rotational speeds from one another. Stirring members are helically arranged on outer peripheries of the rotary shafts at predetermined helical and angular pitches for kneading an object during rotation of the rotary shafts. The helical pitch of the stirring members of one of the rotary shafts has an inverse helix from that of the stirring members of the other rotary shaft. The stirring members have surfaces with a first phase configured to move the kneaded object in a feed direction or a second phase symmetrical to the first phase and configured to move the kneaded object in a direction reverse to the feed direction. The stirring members are arranged so that the first and second phases cyclically repeat in a predetermined sequence in axial directions of the rotary shafts.