Producing defect-free high-quality parts that meet visual and dimensional requirements is essential in the injection molding industry. Many common molded parts such as syringes, gears, and cups are round by design. Others have round design features such as bosses, through-holes, and seal grooves. This lesson focuses on achieving dimensional requirements when designing and molding round parts and round features.
Topics covered in this lesson include: the key factors for achieving dimensional roundness of a molded part; how wall thickness and gating can affect volumetric shrinkages, resulting in roundness and dimensional differences; and the importance of polymers and gating on fiber orientations and resulting dimensions.