The utility model discloses a mould
sprue for
bottle blank production, which relates to the technical field of
plastic molding, and comprises a mould base body, a
sprue bush, a fixing ring and a pair of semi-ring bodies, the mould base body is provided with a first mounting hole, and the mould base body is provided with a second mounting hole corresponding to the upper part of the first mounting hole in an external expansion manner; the second mounting hole and the first mounting hole form a stepped table and are located on the same axis, the fixing ring is fixedly arranged on the
sprue bush and integrally formed with the sprue bush, the outer
diameter of the sprue bush is smaller than or equal to the inner
diameter of the first mounting hole, and the outer
diameter of the fixing ring is smaller than or equal to the inner diameter of the second mounting hole; the sprue bush with the fixing ring and the mold base body with the second mounting hole are preset, the fixing ring is clamped in the second mounting hole, the fixing ring is axially pressed through the pair of semi-ring bodies, the sprue bush is fixed while the stability of the sprue bush is guaranteed, the semi-ring bodies are fixed through the screws, mounting and dismounting are convenient, and parts are prevented from being damaged.