| 摘要 |
In a method of extruding a food product wherein starting products and water are fed to an extruder and mixed in a mixing zone and wherein the mixture is heated and plastified by the supply of shearing energy and, after passing through a nozzle, is foamed, in order to achieve a product quality which remains constant independently of alterations in the properties of the starting products and external disturbing factors, it is provided that, with a constant speed of rotation of the shaft or shafts of the extruder, the drive power (N) applied to the shaft or shafts by the drive motor is measured, that the bulk throughput (m) of the starting products supplied is measured, that the quotient (s) of these quantities (N,m) is formed in a computing device and that this specific energy (s) thus determined is fed, as a controlled quantity, to a controller which keeps it constant in accordance with a preset desired value (sSoll) in such a manner that the supply of water to the mixing zone of the extruder and/or a supply of steam are influenced as correcting variables by the controller. |
