Raw material mixing method and apparatus

摘要

In the batch type raw material mixing method according to the present invention used when a viscous material is obtained, a plurality of kinds of raw materials of different properties placed in a cylindrical container are agitated by agitating blades (3). The raw materials are thus agitate-mixed as the rotational speed of the agitating blades (3) is switched cyclically between a high level and a low level. The apparatus for practicing this method comprises a cylindrical container (1) holding a plurality of kinds of raw materials of different properties therein, agitating blades (3) provided rotatably in the cylindrical container, a driving means (5) for rotating the agitating blades, and a control unit (7) for controlling the cyclic switching of a rotational speed of the agitating blades between a high level and a low level. <IMAGE>