| 摘要 |
<p>A product densification system (1) and method for producing aquatic feed, densified cattle 'range cubes' or the like includes a conventional cooking extruder (2) into which feed ingredients, including cereal grains and additives, are introduced. The feed ingredients are cooked, gelatinized and expanded in the cooking extruder (2) to form an intermediate feed product. The intermediate feed product is then loaded onto a cooling conveyor (47) where it is transported to a product densification unit or PDU (3). The PDU (3) is a specially designed extruder which is adapted to densify and shape the intermediate feed product into a final feed product which is dense enough to sink in water and stable enough to stay together for a considerable period of time while submerged or exposed to weather. The density of the sinking feed, and therefore, the sink rate thereof, can be controlled by controlling the shaft speed of the extrusion screw in the PDU (3).</p> |
