Abstract: An injection mold includes a male mold, a female mold engaged with the male mold to define a shaping chamber therebetween, an ejection plate mounted on the female mold, and an insert element. The female mold includes a female mold plate defining a female receiving space for receiving a female core therein, and a first insertion groove connecting with the female receiving space. The female core defines a first channel, and a plurality of slots connecting between the first channel and the shaping chamber. The insert element has a top inserted in the ejection plate and a bottom stretched in the first insertion groove to cooperate with the first channel and the slots to define a runner. An injection feeder nose is inserted in the insert element for injecting melted plastic materials into the runner so as to make the melted plastic materials flow into the shaping chamber.