Huff edgeless die for dust cover

The utility model provides a dust cover Haff edgeless die which comprises an upper die plate, a middle die plate and a lower die plate which are sequentially arranged from top to bottom, a plurality of assembling grooves are formed in the middle die plate in a penetrating mode, Haff pieces are assembled in the assembling grooves, each Haff piece comprises two Haff strips which are oppositely arranged, and a plurality of middle die cavities are formed between the two Haff strips in a matched mode. A plurality of upper mold cores are arranged at the bottom of the upper mold plate; a plurality of lower mold cores are arranged at the top end of the lower mold plate, and limiting sliding rods are arranged at the positions, located at the two ends of the Haff strip, of the lower mold plate and penetrate through the Haff strip in a sliding mode; in the mold closing state, the multiple upper mold cores and the multiple lower mold cores stretch into the middle mold cavity, and the upper mold cores, the lower mold core