three-layer Co-extrusion Rotary Die-head film Characteristics:1.Die head is lauer type spiral mandrel, ... vertical cutting device, cooling water row pipe, film spreading roller, scrap collecting device.Use:The ... . Manual Mechanics Screen Changer 6. Die Rotary Device Main ParameterMODELSD-3L45SD-3L50SD-3L55Suitable MaterialsLDPE LLDPE ... three-layer Co-extrusion Rotary Die-head film blowing machine