Temperature control arrangement for an extruding process

Details Temperature control arrangement for an extruding process Temperature control arrangement for an extruding process

1987-04-15

1989-06-27

Tarcza, Thomas H.

Boots, shoes, and leggings

364477, 264 406, 165 30, 165 14, 72 13, 366145, 425144, G06G 730, F25B 2900

Patent

active

048435767

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.

REFERENCES:
patent: Re32270 (1986-10-01), Murray
patent: 3161560 (1964-12-01), Mosher et al.
patent: 3437325 (1969-04-01), Putman
patent: 4168290 (1979-09-01), Giles
patent: 4222973 (1980-09-01), Hill et al.
patent: 4674027 (1987-06-01), Beckey

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