Spiral accumulator is used to receive strip steelfrom uncoiler and at the same time provide the steel strip to forming unit. Structure and working rule The capability of reservation can be controlled by spiral parallel.The circumference difference of outer and inner parallel multiply by number of parallel is the capability of reservation. There are guide roll supporting stand and torsion area infront of spiral accumulator. Steel strip will be turned from horizontal state to vertical state.Guide roll supporting stand is made up of carrier frame and holder and two vehicle withdrawal rolls,vehicle withdrawal rolls can alter strip steel from horizonstate to verticalstate.Vehicle withdrawal roll is droved by electric machine, which and drive unit of accumulate is controlled by operating table.