The utility model discloses a three-plate movable synchronous mold opening and closing structure of a blow mold for an injection blow molding machine, comprising a fixed shell, a supporting mechanism, a connecting mold and a fixed mold base, the fixed shell is used for protection and support, and the supporting mechanism is elastically supported on the inner end surface of the fixed shell, wherein the fixed shell comprises a fixed shell body, a sliding groove and a convex mold, and the bottom end surface of the fixed shell body is symmetrically and fixedly connected with a convex mold for molding. In the utility model, by arranging the connecting mold, the fixed shell can extrude and combine the connecting mold and the fixed mold base together under pressure during blow molding, thereby facilitating subsequent blow molding; meanwhile, the groove body can be adapted to the fixed convex mold to form a mold cavity for subsequent blow molding, the positioning hole can facilitate positioning and connection with the spring support rod inside the fixed mold base, and can also provide sufficient elastic force for separation after subsequent blow molding.

Country Code: CN

Application Number: CN201920787347.3