A special screw for the extrusion mechanism of a blow molding machine relates to the technical field of extrusion screws for blow molding machines, including a feeding section, a melting section and a homogenizing section. The screw is characterized by further comprising a mixing section connected to the rear end of the homogenizing section. The mixing section consists of a rod body and three sets of flow dividing and stirring parts arranged at intervals on the outer circumference of the rod body. A preset number of wave-shaped retaining rings surrounding the rod body are arranged between the front and middle flow dividing and stirring parts, and slope-shaped protrusions surrounding the rod body are arranged between the middle and rear flow dividing and stirring parts. Each flow dividing and stirring part is composed of a preset number of circles of flow dividing protrusions evenly distributed on the rod periphery; the cross-section of each flow dividing protrusion is rhombic, and one diagonal of the rhombic cross-section is parallel to the central axis of the rod body. The perpendicular bisector of the connecting line between adjacent protrusions on the same circle passes through one flow dividing protrusion on the adjacent circle. The screw can fully mix raw materials during extrusion and ensure uniform blending of all components.
Area Code: CN
Application Number: CN201821590989.6
