Pneumatic opening and closing shoe mold for dual-density disc injection machine

The utility model relates to a pneumatic opening and closing shoe mold for a dual-density disc injection machine, which comprises a bottom mold, framework components capable of turning over by 90 degrees are arranged on the left side and the right side of the bottom mold, a through connecting cavity is arranged below the bottom mold, each framework component comprises a connecting plate mounted in the connecting cavity, two ends of each connecting plate are respectively hinged with a framework plate, and the framework plates are connected with the bottom mold. The framework plate comprises a hinging part hinged with the connecting plate and an arc-shaped edge which is arranged at the other end of the hinging part and is matched with the shape of the mold cover, and the framework plate can be overturned to a position parallel to the connecting plate or vertical to the connecting plate along the hinging part through the hinging part; a pneumatic opening and closing device capable of synchronously driving the fr