... need color printing can be achieved,and has a colorful uniform lines,reasonable structure,advanced technology,rolling ... traction device that can effectively improve colorfilm production.2. Screw,cylinder used 38CrMoAl,after nitrogen treatment and ... ,rolling for mation,for convenient volume ModelSJ40×2-700SJ45×2-900screw diameterΦ40+40Φ45+45screw ratio ... 42003500×3000×4500weight of machine2.5T3.5T