NEW DESIGNS OF INDUSTRIAL ACCUMULATORS FOR ELASTIC WEBS: STRUCTURES COMPARISON

摘要

Accumulators are used in industrial elastic web processing plant such as paper, mills, fabric, rolling mills, to permit rewind or unwind core changes while the process continues at a constant velocity. The objective is to maintain constant web line velocity and tension into and downstream the accumulator. This paper presents a summarize of nonlinear models of different classical industrial accumulator structures: one with a pneumatic actuated carriage and one with a motorized carriage. These models are derived from physical laws that describe web tension and velocity dynamics in each web span. A second part presents new accumulator structures enabling performances improvement, considering the accumulator output web tension. Finally, the last part of this paper compares, by simulations in Mat-lab/Simulink software environment and using performances criteria, the performances of optimized accumulators and classical industrial ones.