Injection mold

The utility model provides an injection mold. The mold comprises a front mold core, a rear mold core, a base plate and thimbles, the backing plate is positioned on the side of the rear mold core awayfrom the front mold core; the base plate is provided with a water inlet channel and a water outlet channel; the rear mold core comprises a rear mold core and a cooling insert; the rear mold core comprises a cavity end part and a mounting end part; a cavity and a runner can be formed by the end part of the cavity and the front mold core; the mounting end part is fixedly mounted on the base plate; an opening with an opening in one end is formed in the rear mold core; oPENING AT MOUNTING END, the cooling insert is positioned in the opening; the cooling insert is provided with a through hole and acooling groove; the through hole penetrates through the cooling insert in the mold opening and closing direction of the injection mold, the cooling groove is located in the outer surface of the cooling insert and communicates