Injection mold

An injection mold, comprising:

• an upper mold core;
• an upper mold plate;
• a sprue bushing completely accommodated in the upper mold plate and the upper mold core, the sprue bushing defining a runner therein, wherein the sprue bushing comprises a mounting part and an extending part extending from the mounting part, a cross section of the mounting part is larger than that of the extending part, the mounting part is received in the upper mold plate, the extending part is disposed through the upper mold core, the runner runs through the mounting part and the extending part, and a gap is provided between the upper mold plate and a side edge of the sprue bushing;
• and
• an upper mold fixing plate, wherein the upper mold fixing plate is piled on and fixed to the upper mold plate, the upper mold fixing plate is provided with a through hole communicated with the runner, the upper mold fixing plate includes a flange extending inwardly from a side wall of the through hole, the flange abuts against the mounting part, the injection mold includes a fastener, and the fastener is disposed through the flange and is fixedly connected with the mounting part and fixes the sprue bushing to both the upper mold fixing plate and the upper mold plate.