FEEDBACK CONTROL FOR A CONTINUOUS MIXER HAVING A CONTROL OF INTERNAL PRESSURE

This disclosure is directed toward an electromechanical feedback control for automatically regulating the discharge temperature in a continuous mixer. The feedback control senses both the mixer discharge temperature and the rate of change of mixer rotor torque. The torque rate of change is detected...

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Bibliographische Detailangaben
Hauptverfasser:	SPITZNER K,US, HOLD P,US, NOTTE A,US
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CONTROLLING MAKING GRANULES OR PREFORMS MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PHYSICS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS REGULATING SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	This disclosure is directed toward an electromechanical feedback control for automatically regulating the discharge temperature in a continuous mixer. The feedback control senses both the mixer discharge temperature and the rate of change of mixer rotor torque. The torque rate of change is detected by a derivative circuit and serves to offer an anticipatory signal to the control system. The feedback control then regulates the internal pressure of the mixer in accordance with an error signal representing the difference between the measured mixer discharge temperature plus torque derivative signals and a preset desired temperature command signal.