R & D Engineering is located in Earlham, Iowa. Call us for all of you needsDesign - Mold Making - Production - Secondary Operations - ProcessR&D Engineering Helps You Achieve Production SuccessR&D Engineering provides our customers with a start to finish service. No matter how complex or unusual, how large or small, your next plastic injection molding project will achieve production success. R&D Engineering Helps You Achieve Production SuccessR&D Engineering provides our customers with a start to finish service. No matter how complex or unusual, how large or small, your next plastic injection molding project will achieve production success.