| 摘要 |
The invention relates to an improved extruder for the production of spheroidal or spheroid particles. The inventive extruder consists of a cutting tool comprising knives which take the form of a rectangular blade having first and second flat parallel faces. The aforementioned blade takes the form of a knife owing to a recess which is provided on one of the faces thereof. The recess is only provided on one part of the face in question, such that one of the long sides of said face comprises a narrow flange. Moreover, the two faces of the blade are connected by an inclined surface which extends between the non-recessed face and the narrow flange, the edge of which is used to cut the extruded profile. The extruder also comprises an extrusion die consisting of a ring piece and a cylindrical cap having an axis. One of the ends of the aforementioned cap comprises a collar by means of which the cap is applied against the ring piece, while the other end thereof is closed with a truncated-cone-shaped wall, the conical part of which forms an angle alpha with a plane which is perpendicular to the axis.
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