This utility model discloses a low-cost and reliable electric pre-plasticizing mechanism for an injection blow molding machine, which comprises a pair of guide rails arranged on an injection station base, with an injection second plate movably arranged on the pair of guide rails. A transmission shaft is rotatably arranged in the injection second plate, and the end of the transmission shaft is connected with a screw. An annular positioning block for installing and positioning a first bearing is arranged on the transmission shaft, an annular mounting part is arranged on the transmission shaft at the side of the annular positioning block far away from the screw, and a second bearing is sleeved on the annular mounting part. A third bearing is arranged on the transmission shaft at the side of the annular mounting part far away from the screw, an axial mounting hole for installing the screw is arranged in the transmission shaft, and a split ring connected with the screw is arranged on the transmission shaft. A locking groove matched with the split ring is arranged on the screw, a motor mounting seat is arranged on the injection second plate, a servo motor is arranged on the motor mounting seat, a driving pulley is sleeved on the output shaft of the servo motor, a driven pulley is arranged on the transmission shaft, and a timing belt is sleeved on the driving pulley and the driven pulley.

Country Code: CN

Application Number: CN202022497886.9