In this work the control system for a continuous gravimetric blender for polymer extrusion process has been designed. The plant considered in this paper is a blending machine that mixes two different polymers, a bulk one and an additive. Each component of the mix is metered by a dedicated screw meter system. The mass delivered by each meter is measured by a load cell. The two components are poured into a hopper (the mixer) directly embedded on the extruder input. The control objectives are manifold and include: accurate mass flow estimate on the basis of the weight and screw speed measurements; accurate mass flow regulation of each meter; keeping of the relative proportions among all the components that are metered in all the operating conditions; guarantee that inside the mixer there is always material enough to fulfill the mass flow variation request of the extruder.

(2011). Control System Design for a Continuous Gravimetric Blender [conference presentation - intervento a convegno]. Retrieved from http://hdl.handle.net/10446/27660

Control System Design for a Continuous Gravimetric Blender

PREVIDI, Fabio;BELLOLI, Damiano;COLOGNI, Alberto Luigi;MADASCHI, Matteo Giacomo
2011-01-01

Abstract

In this work the control system for a continuous gravimetric blender for polymer extrusion process has been designed. The plant considered in this paper is a blending machine that mixes two different polymers, a bulk one and an additive. Each component of the mix is metered by a dedicated screw meter system. The mass delivered by each meter is measured by a load cell. The two components are poured into a hopper (the mixer) directly embedded on the extruder input. The control objectives are manifold and include: accurate mass flow estimate on the basis of the weight and screw speed measurements; accurate mass flow regulation of each meter; keeping of the relative proportions among all the components that are metered in all the operating conditions; guarantee that inside the mixer there is always material enough to fulfill the mass flow variation request of the extruder.
2011
Previdi, Fabio; Belloli, Damiano; Cologni, Alberto Luigi; Savaresi, SERGIO MATTEO; Cazzola, Daniele; Madaschi, Matteo Giacomo
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10446/27660
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