Extrusion stretch blow molding machine biaxial stretch orientation blow molding technology is developed on the basis of ordinary extrusion hollow blow molding machine. Containers produced by the extrusion blown process have a certain degree of orientation of the axial and radial macromolecules, so they show excellent performance and develop rapidly.
The process of extrusion stretch hollow blow molding machine first uses the extruder to extrude the plasticized melt into a thick-walled pipe through a die die, and cut the thick-walled pipe into a certain length as a cold parison. The cold parison is placed in a heating furnace and adjusted to the stretching temperature, and then the heated parison is taken out of the furnace and sent to the molding table by a transport device, so that one end of the parison forms a neck and a thread, and a stretching rod is used After it is stretched 100% -200% in the axial direction, the blow mold is closed for inflation. Extrusion stretch molding equipment includes two types of molding equipment: one-step method and two-step method.