The invention discloses a stretch blow molding machine and a blow molding method thereof. The blow molding machine comprises a frame, an extrusion mechanism, a die head, a mold clamping mechanism, a lower blowing mechanism, a manipulator and a controller. The manipulator comprises at least one pair of clamping mechanisms, a transmission mechanism and a manipulator driving mechanism. The controller includes a manipulator position drive unit configured to control the downward stretching speed of the parison by the manipulator, such that the vertical downward moving speed is higher than the free-sagging speed of the extruded parison, thereby longitudinally stretching the parison and improving product strength. By longitudinally stretching the parison during traction, the molecular chains are effectively arranged, enhancing the toughness and strength of the product and making it less susceptible to damage.
Country Code: CN
Application Number: CN201110394239.8
