5. Screw elements
(1)Material is W6Mo5Cr4V2 (high speed tool steel) with the best wear resistance, the whole adopts vacuum quenching treatment, hardness is 60 ~ 62HRC; (2)Designed by the building block principle, and the screw element and the screw shaft are connected by an involute spline, and the screw combination can be adjusted according to the process requirements; The screw elements are all made by CNC machining center, with good identity and strong process repeat-ability,which is benefit for changing;
6. Screen changer+Die-head: Quick open die-head, convenient and fast, short flow path of the machine head and less material storage can significantly reduce the deterioration of the material's physical properties, yellowing, black spots and other defects;