THERMAL MANAGEMENT OF EXTRUDER OF MOLDING SYSTEM

• Main Authors: MANDA, JAN MARIUS, DOMODOSSOLA, ROBERT
• Format: Patent
• Language: English; French
• Published: 28.09.2010
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; PERFORMING OPERATIONS; POWDER METALLURGY; 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

Controller of molding system having: extruder, extruder heaters, hot runner having: zone, and thermal sensor placed proximate of zone, machine nozzle connecting extruder to hot runner, controller operatively coupled to thermal sensor, controller comprising: controller-usable medium embodying instructions executable by controller couplable to molding system, instructions configured to direct controller to: (i) control thermal condition of extruder by controlling extruder heaters; (ii) determine whether change in thermal condition of extruder is required based on thermal condition of zone of hot runner; (iii) adjust threshold of extruder heaters based on a non-extruder sensor that is positioned away from extruder but positioned proximate to melt passageway; and (iv) use the non-extruder sensor in closed loop feedback control schema to adjust heat of extruder.