Hydraulic screen changer is an auxiliary machine of the extrusion line equipment, the price is also uneven, how to choose a suitable for their own needs of the hydraulic screen changer ? First, consider the characteristics of their raw materials Because each raw material melting point, melting finger, corrosivity, fluidity is different, the requirements of the screen changer is naturally different. Second, take into account the raw material they use is new or old material If the old material, wh