Die opening and closing structure of hub casting die side die

The utility model discloses a mold opening and closing structure of a hub casting mold side mold, which relates to the technical field of hub casting molds and comprises a side mold body, guide flat keys matched with side mold sliders are horizontally arranged on two side surfaces of the side mold body respectively, chutes corresponding to the guide flat keys are arranged on the side mold sliders, and the guide flat keys are arranged on the side mold sliders. A rolling connecting piece is arranged in the sliding groove and is in rolling fit with the guide flat key, and a movable supporting part used for bearing the gravity of the side die is arranged at the bottom of the side die body. According to the side die, the side die body and the side die sliding block are matched in a rolling friction mode to achieve the side die opening and closing action, the problems that a sliding groove and a guide flat key are prone to abrasion, die assembly precision is reduced, and product casting quality is affected when a t