Die assembly for injection of variable-diameter composite insulator umbrella skirt

The invention relates to a variable-diameter composite insulator umbrella skirt injection mold assembly which comprises a mold and a baffle, the mold is provided with a forming cavity used for containing a center cylinder, and the forming cavity comprises a conical cavity section or is a conical cavity; the baffle is used for being arranged on one side of the mold and comprises a supporting plate and a buffer plate, and the buffer plate is fixed to the side, facing the mold, of the supporting plate so as to stop the end of the large-diameter section of the center cylinder in the forming cavity in the axial direction of the forming cavity; the mold assembly further comprises a fixing structure used for fixing the baffle to the mold. When an umbrella skirt is formed, the central cylinder can be stopped in the axial direction through the baffle, the central cylinder is prevented from moving in the axial direction, and the injection molding quality of a product is guaranteed. Moreover, as the baffle is fixed on o