Load monitoring method and load monitoring apparatus for kneading apparatus

In an extruder or a kneader (2), load (torque T) values on an input shaft portion (5) of a screw shaft (3) are detected by a load detector (7) installed on the input shaft portion (5), then an overload condition is determined from a load mean value (T a ) and a load amplitude value (T w ) of the det...

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Bibliographische Detailangaben
Hauptverfasser:	YAMANE, YASUAKI, KASAI, SHIGEHIRO, HONKE, KOICHI, YAMAGUCHI, KAZUO
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING MEASURING MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE PERFORMING OPERATIONS PHYSICS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TESTING TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	In an extruder or a kneader (2), load (torque T) values on an input shaft portion (5) of a screw shaft (3) are detected by a load detector (7) installed on the input shaft portion (5), then an overload condition is determined from a load mean value (T a ) and a load amplitude value (T w ) of the detected load values, and the issuance of an "abnormal" alarm and/or the stop of rotation of the screw shaft (3) are (is) performed when an overload duration time (t 0 ) of maintaining the overload condition exceeds a set time (t s ). In this way the screw shaft (3) is protected from fatigue fracture caused by application thereto of such a load as does not exceed a designed mechanical strength but causes fatigue fracture.