The stretch rod is an indispensable core component in stretch blow molding processes, specifically designed for high-speed stretching and blow molding of plastic preforms (PET, PP, PE). During bottle forming, the stretch rod ensures uniform wall thickness distribution and defect-free bottle geometry through precise control of stretching velocity, stroke, and axial force. This enhances molding efficiency and product consistency, particularly suited for intelligent production lines with high-capacity and high-precision requirements.