Tail attaching device for injection molding of through-wall connector

The utility model discloses a tail attaching device for injection molding of a through-wall connector. The connector is used for being connected with the tail of the through-wall connector, and the tail of the through-wall connector is sequentially provided with a middle external thread section, a tail ring and a welding cup. The whole device is a hollow cylinder with a small head and a large tail, the interior of the cylinder is composed of two sections with different inner diameters, one section is internally provided with an internal thread which is in threaded connection with a middle external thread section of the through-wall connector, and the inner diameter of the other section in the cylinder is equal to the outer diameter of a tail ring. The front end boss and the middle external thread section between the two sections are clamped with the joint of the tail ring; the outer surface of the cylinder is provided with a plurality of steps for enhancing the adhesive force of an injection molding material