Effect of process parameters on the performance of PA6 products fabricated by rotational molding

Abstract

AbstractIn this study, a desktop‐class dual‐axis rotational molder was employed to mold PA6 products. Notably, the morphology of the plastic powder during the rotational molding process was examined through visualization techniques. The research also aimed to delineate the causes of wall thickness variation in the products, while proposing a process method to enhance the uniformity of wall thickness. The implementation of a two‐stage mold temperature setting method for the ends of the mold improved wall thickness uniformity of the products. Furthermore, the interrelationships between crystallinity, tensile strength, and impact strength of the products were explored by comparing different cooling rate conditions. Increasing the cooling rate resulted in a decrease in both crystallinity and tensile strength, while concurrently boosting the impact strength of the products.Highlights A desktop‐class, two‐axis rotational molding equipment is designed. A method for visualizing the rotational molding process is conducted. Mold temperature and rotational speed affect product wall thickness. Two‐stage mold temperature improves wall thickness uniformity. Mold cooling rate affects the tensile and impact strength of the product.