Calibrator is the key factor to affect the extrusion speed. Aona uses segmented and progressive shrinkage of design concept, all water vapor holes are processed by high-precision gun drill with high pre cision, the distance between the hole and the cavity is only 3mm, and the cooling efficiency is high. Because of the high smoothness of inner hole, impurities are not easy to stick, prolonging the on-line production cycle of the tooling.