DESIGNING PET PREFORM INJECTION MOLDING PROCESSES FOR THE LIGHTEST PRACTICAL WEIGHT OFFERS OPPORTUNITIES FOR IMPROVED PRODUCTVITY AND QUALITY

摘要

Control of PET preform manufacturing processes is often driven by the desire to avoid visible defects. Many visible defects plus wide weight tolerances and insulation of injection processes from stretch / blow molding processes lead to overpacked heavy preforms. This paper presents evidence, via results from designed experiments, that making the lightest preform practical from a given preform mold often opens significant opportunities for improved productivity and quality for preform and bottle manufacturing.