Temperature control arrangement for an extruding process
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United States of America Patent
Stats
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Jun 27, 1989
Grant Date -
N/A
app pub date -
Apr 15, 1987
filing date -
Apr 15, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An arrangement for controlling the process temperature in an industrial process involving an extruding operation includes a summing element which sums the difference between the process temperature and a setpoint temperature with the rate of change of the process temperature and conveys this sum to a proportional and integral controller so that the output thereof acts in an inverse manner with the process temperature. This output of the controller is summed with the change of temperature rate which has been fed forward, to generate a demand signal. The demand signal is shaped and compared to a ramp waveform to generate a variable frequencey pulse for controlling a heating and/or cooling device associated with the extruding device. A change of speed rate can also be summed to form the demand signal.
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Patent Citation Ranking
- 17 Citation Count
- F25B Class
- 0 % this patent is cited more than
- 36 Age