Design of an experiment for injection blow molding

Abstract

This research was requested by the quality control engineer of a company manufacturing plastics products such as bottles and caps. These products are manufactured with polyethylene and polipropylene resin, using two molding processes: injection blow molding and extrusion blow molding. We designed an experiment to find out the inconsistency in the diameter of the threads of bottle # 20914, which the customers claim does not meet the required specifications. This product is manufactured by injection blow molding.