| 摘要 |
The invention relates to an apparatus and a process for controlling the temperature of an extruder in the processing of plastics, an actual-value signal being generated on the basis of the temperature of a sector of the extruder and compared with a set-value signal, and an intervention signal for changing the temperature of the sector being generated on the basis of the comparison. In the case of the process it is important that an actual-value signal is generated on the basis of the temperature of a sector of the extruder and is compared with a set-value signal, and that an intervention signal for changing the temperature of the sector is generated on the basis of the comparison, each sector being assigned a set-value signal according to a predetermined temperature distribution and an actual-value signal. The proposed apparatus, which includes, arranged in each sector (H) of the extruder, a control unit (S1) for setting the temperature of the sector (H) by a power switch (S2), is designed according to the invention in such a way that, for the purpose of increasing the reliability of the control and ensuring the conditions for safeguarding the desired quality of the end product, the output of the control unit (S1) is connected to a first comparator (M2), that there is also provided a sampling unit (M1), which receives a signal corresponding to the temperature of the sector (H) and is fed to a second comparator (M3), the first comparator (M2) and ... Original abstract incomplete. <IMAGE>
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