VENT-UP DETECTING METHOD OF EXTRUDER EQUIPPED WITH VENT, AND EXTRUDER

PROBLEM TO BE SOLVED: To provide a vent-up detecting method for surely and quickly detecting the sign of vent-up of an extruder equipped with a vent.SOLUTION: In a cylinder (5), a first pressure sensor (12) is set near a granulator (3), a second pressure sensor (13) is set at a given position betwee...

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Bibliographische Detailangaben
Hauptverfasser:	TAKANISHI KENTA, USHIO TAKESHI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING MAKING GRANULES OR PREFORMS PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a vent-up detecting method for surely and quickly detecting the sign of vent-up of an extruder equipped with a vent.SOLUTION: In a cylinder (5), a first pressure sensor (12) is set near a granulator (3), a second pressure sensor (13) is set at a given position between the vent (10) and granulator (3), and a third pressure sensor (14) is set near the vent (10) close to the granulator (3), respectively. Pressure of molten resin near the vent (10) is predicted from the pressure of the molten resin measured by the first and second pressure sensors (12, 13), to detect the sign of the vent-up. From the pressure of the molten resin measured by the third sensor (14), the occurrence of the vent-up can be detected.