High-pressure sheath forming die for built-in plastic part of gearbox

The utility model provides a high-pressure sheath forming die for a built-in plastic part of a gearbox. The high-pressure sheath forming die comprises an upper die, a frame die middle frame and a lower die, a mold cavity is formed in the mold erecting middle frame; a plurality of groups of Hough blocks are arranged in the die cavity; a plurality of wear-resistant blocks are arranged on the side surface and the top surface of each group of Hough blocks; the frame mold middle frame comprises a front mold frame plate; a plurality of groups of gearboxes are arranged at the front end of the front mold frame plate; a plurality of positioning guide columns are arranged in the lower die; and a plurality of groups of cores are also arranged in the lower die. The molding die for the high-pressure sheath of the built-in plastic part of the gearbox is simple in structure and convenient to use, and the wear resistance, the stability and the service life of the die are improved through the structural design of the wear-res