The invention discloses a
plastic bottle one-step full-
servo injection molding device and a
plastic bottle one-step full-
servo injection molding method, and particularly relates to the technical field of injection molding equipment. Comprising a rack, a fixed mold, a movable mold, a female mold, an
injection port, a male mold, an injection cylinder, a metering injection unit, a communication seat, a cylindrical part, a fixed cylinder, an injection sleeve, a shrinkage cylinder, an injection
nozzle, a deformation joint, a taper hole and a pressure relief unit, and the pressure relief unit is used for driving the injection sleeve to move in the fixed cylinder. According to the injection mold, when the pressure of plastic melt in the communication base is large, the pressure relief unit is triggered to act, the pressure relief unit drives the injection sleeve to move in the direction away from the fixed mold, then the shrinkage
barrel is separated from the state that the shrinkage
barrel is extruded by the taper hole, the shrinkage
barrel is converted into elastic expansion deformation from original elastic shrinkage deformation, and then the opening portion of an injection
nozzle of the shrinkage barrel is expanded; the
injection pressure of plastic melt is reduced, large
impact on the surface of a female die or a male die is avoided, and meanwhile the pressure loss phenomenon is reduced.