| 摘要 |
An extruder which serves for kneading and extruding rubber and synthetic material mixtures. The extruder is equipped with a rotatably mounted screw, and pin bodies which project into the interior of the housing. These pin bodies can be damaged, and in particular can be bent or even broken. In order to quickly determine these failures, and possibly to even determine deformed pin bodies, the latter are incorporated into an electrical monitoring circuit. The pin bodies are provided with electrical inserts which influence the monitoring circuit when deformations or breakage of the pin bodies occur, in order in this way to transmit a signal or even electrically switch off the extruder. In place of the electrical inserts, photo conductors can be used, the optical conductivity of which can be utilized for determining the aforementioned damages.
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