To suppress the wear of sealing parts and to prevent the leakage of materials to be kneaded by providing the annular surface of a rotor or the inside wall surface of a vessel with plural projections spaced from each other around its axial line in a tangent direction.
Either of the annular surface of the rotor 1 or the inside wall surface of the vessel 3 is provided with the plural projections 3' spaced from each other around its axial in a tangent direction. When the rotor 1 of the dust stop of such pressurizing kneader 1 rotates, the pasty raw materials intruding between the annular surface of the rotor 1 and the inside wall surface of the vessel 3 are pressed to the respective projections 3' and are extruded in a radial direction. The pasty raw materials are therefore, admitted between a sealing member 4 and a sealing plate and the wear of the sealing member 4 is suppressed. The pasty raw materials fill the spacing between the annular surface of the rotor 1 and the inside wall surface of the vessel 3 and the pressure in the part rises high. The spacing of the sealing member 4 and the sealing plate does not arise and the leakage of the raw materials is prevented.
HANADA SHUICHI
TAKAHASHI KAZUHITO
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