In-mold welding head convenient to adjust

The invention discloses an in-mold welding head convenient to adjust. The in-mold welding head comprises a mounting plate, a through groove is formed in the surface of the mounting plate, a sleeve is slidably mounted on the surface of the through groove, a connecting cylinder is fixedly connected to one end of the sleeve, first copper nuts are symmetrically mounted in the connecting cylinder, the surfaces of the two first copper nuts are fixedly connected with a first oil nylon gasket and a first copper gasket respectively, the surfaces of the first oil nylon gasket and the first copper gasket are both fixedly connected with light emitting lenses, the other end of the connecting cylinder is fixedly connected with a fixing plate, the surface of the fixing plate is fixedly connected with a corner piece, a second copper nut is mounted at the end, close to the corner piece, of the sleeve, and the surface of the second copper nut is fixedly connected with a second copper gasket. The in-mold welding head has oil-pr