Material Integrity in Molded Plastic Gears: AND ITS DEPENDENCE ON MOLDING PRACTICES

摘要

The quality of molded plastic gears is typically judged by dimensional feature measurements only. This practice overlooks potential deficiencies in the plastic injection molding process and its effect on the integrity of the plastic material. These deeper issues are not often given proper consideration until a related gear failure demands study and evaluation. This paper identifies some of these oversights in the molding process, the resultant effect on the plastic material and discusses their likely effect on short- and long-term gear performance.