... series three(five)-layer coextrusion wide-size film blowing machine set is composed of three(five)sets of extruders ... three9five)-layer compounding die head,cooling ai rring,hauling machine,coiling machine,temperature and electric control system,etc.It is mainly ... 5.Hauling roller and coiling roller are conducted dynamic balancing test,rectifying,and accurate grinding processing. 6.It adopts inserting ...