Leveraging Standard Inserts in Fabrication of Low-Cost Tooling for High-Performance Applications

Abstract With the rapid changes in product designs and the increasing demand for customized products, the industry seeks rapid and cost-effective tooling solutions suitable for medium- to low-volume production. While additive manufacturing (AM) techniques provide a promising approach to toolmaking, each AM process has its limitations. Combining multiple AM processes can enhance overall performance, improving tool quality and functionality. This study presents a new low-cost tooling approach for high-performance applications by integrating standard metal inserts with AM polymer inserts. Complex features such as threads can be directly integrated during the molding process by incorporating commercially available components as inserts within a hybrid molding framework. The study investigates the development and evaluation of two sets of injection molding tools—one utilizing fused filament fabrication (FFF) and the other combining stereolithography (SLA) with FFF—both incorporating standard metal inserts. This assessment aims to determine the feasibility and benefits of the hybrid approach in manufacturing high-performance products. Results indicate that standard metal inserts provide a reliable solution for creating small features such as internal and external threads, while SLA inserts improve surface quality and dimensional accuracy. Integrating standardized metal inserts enhances precision in high-performance applications and enables the production of complex parts with intricate details. These inserts simplify the fabrication of 3D-printed components by incorporating critical features, such as threads, that may be challenging to achieve with 3D-printed techniques alone. Furthermore, the modular design of this approach allows for the easy replacement of individual inserts rather than the entire tool, making it particularly beneficial for iterative design and prototyping. The proposed hybrid tooling strategy balances durability, precision, and affordability, offering a scalable and adaptable solution for various industries requiring rapid, cost-effective production of durable, high-performance products.