What is Scrap

This research aims to find the causes of weight variation of plastic products that cause a high cost and rework. The importance of using statistical control on the weight of plastic parts is presented; describing the type of machinery used to manufacture, considering the properties and applications of material as Acetal and conditions for injection molding operation, where a 24 factorial experimental design was used to find the variables which influence the weight of the product to maintain a stable process. An efficient solution was developed considering the variables of pressure and injection time to be highly significant in the weight of the plastic parts. Finally an optimal arrangement is generated for the plastic injection process which ensures a stable production process and ensures the quality of the product, which implies a reduction of costs and compliance with design specifications.