High density polyethylene pipe necking deforming machine

A necked-in deformation machine for high-density polyethylene pipes is a device of which each level of roller processes compressing deformation to the high-density polyethylene pipes, consequently certain necked-in quantity is realized finally. The necked-in deformation machine essentially comprises a first-level deformation roller, a second-level deformation roller, a U-compressed roller, a centering roller, a shaping roller, connecting angle steel, a rolling bearing, a wheel spacing regulating screw rod and the like. Through the rolling bearing, each roller is integrated via the connecting angle steel. The whole device has the advantages of adjustable wheel spacing, small volume, light weight and space saving, being adaptable for the utilization in the field of reconditioning construction.