Sequential opening structure for large frame product injection molding stack mold

The utility model discloses a sequential opening structure for a large frame product injection molding stack mold, belongs to the field of molds, and provides a mold structure for realizing sequential opening of the large frame product injection molding stack mold, which is simple in structure and lower in cost. The sequential opening structure comprises a middle plate as well as a first punch and a second punch which are positioned on the two sides of the middle plate, wherein the contact face between the middle plate and the first punch is a first mold-splitting face; the contact face between the middle plate and the second punch is a second mold-splitting face; elastic ejection blocks are arranged in the middle of the first mold-splitting face; opening-closing devices are arranged in the middle of the second mold-splitting face. Assistance power is provided for the mold-splitting on the first mold-splitting face by the elastic ejection blocks, and assistance power is provided for the mold-splitting of the second mold-splitting face by the opening-closing devices, so that the sequential mold-splitting of the first mold-splitting face and the second mold-splitting face is realized. According to the utility model, the structure is simple, the mold cost is higher, and the practicability of the stack mold is improved.