Open mill for barbell disc production

The invention relates to the technical field of barbell disc production equipment, and discloses an open mill for barbell disc production, which comprises a bolt movable limiting structure, two side sliding limiting structures and a hydraulic rubber tapping structure. According to the open mill for barbell disc production, on the premise that normal rubber mixing of the rear roller and the front roller is not affected, refined rubber can be limited in a concentrated mode, the maximum rubber failure width after limiting can be limited, the width meets the diameter requirement in the barbell disc production process, then the rubber at the winding position is rapidly cut through the blade, and the rubber quality is improved. In addition, the maximum glue failure length after cutting can be limited through the cutting tool bit moving in a reciprocating mode, so that the width meets the diameter requirement during barbell disc production, the working efficiency is effectively improved, the potential safety hazards