The utility model discloses a kind of
hot runner injection uses shunt cone structure, including shunt mechanism, heat dissipation mechanism and
backflow mechanism, the shunt mechanism includes cone, the cone cap being connected with the top of the cone, the ladder groove being opened in the inner wall of the cone, heat dissipation mechanism, the heat dissipation mechanism includes the water inlet
pipe being penetrated in the lateral wall of the cone, the
water storage ring being sleeved in the inner end of the water inlet
pipe and being fixed to the inside of the cone, the pressure plate being movably installed in the inside of the
water storage ring, the
hydraulic cylinder being connected between the cone and the pressure plate. In the utility model, cold water is introduced from the position of water inlet
pipe, after the inside of
water storage ring is filled with cold water, the movable end of
hydraulic cylinder is lowered with pressure plate, then cold water gushes out from the inside of booster
water pipe, then cold water is twice pressurized after fine tube one, spray head, so that cold water covers the top of cone cap, then the
water curtain formed again flows down along ladder groove, thereby improve heat exchange efficiency.