... use of PID temperature controller, which has limitations for screw cold starts, broken wire detection, temperature preservation, etc. ... be controlled by ±1°C. 4. Microprocessor controller with 4 stages injection, 3 stages holding pressure. 5. Shut ... stability and lower defect in PET preform dimension.SpecofocationUnitALL368injection unit screw diameter mm75screw l/d ratioL/D25shot volume(theoretical) ...