R & D Plastics - Custom Plastic Injection Molding and Engineering Services Plastic injection molding services, engineering services, Hillsboro, OR, R & D Plastics R&D Plastics is plastics injection molding done right. Custom injection molding is our specialty. Our intensive focus and extensive experience allow us to provide superior quality plastic parts at a competitive price. From design to manufacture, contact us to find out what R&D Plastics can do for you.