.. .General Design Principles for DuPont Engineering Polymers Table of Contents General Page Defining the End-Use Requirements Design Check List ... electrical systems for erratic performance Increase gate size Balance cavities for uniform flow Reduce number of cavities 10 – Moulding Considerations Uniform Walls Configurations Uniform wall thickness... and materials of construction for moulding DuPont Engineering Thermoplastic Resins can be found in the Moulding Guides available for DELRIN® acetal resins, MINLON® engineering thermoplastic resins,