The present utility model relates to the field of separation screws, in particular to a separation screw for an extrusion blow molding machine, comprising a first round rod, a second round rod and a third round rod. A spiral clamping rail is fixedly mounted on the outer surface of the first round rod, a first main thread is movably clamped and connected to the inner side of the spiral clamping rail, a first stud is fixedly mounted on the lower end surface of the first round rod, a second stud is fixedly mounted on the lower end surface of the second round rod, first threaded holes are formed at both ends of the outer surfaces of the spiral clamping rail and the first main thread, and first bolts are screwed and connected to the inner sides of the first threaded holes. In the present utility model, when there are different requirements for the size of molten plastic particles, or when the auxiliary thread is seriously worn, the screw of the auxiliary thread section can be replaced independently, so as to avoid replacing the entire screw and reduce the replacement cost. Meanwhile, the fixing mode between the main thread and the round rod is changed, so that the main thread is convenient for independent replacement.
Country Code: CN
Application Number: CN202320596603.7
