Shivam Bansal
Independent Researcher
India
Abstract
Additive manufacturing (AM) has emerged as a transformative technology in rapid tooling, enabling the fabrication of complex tool geometries with reduced lead times and costs compared to traditional subtractive methods. This manuscript evaluates various AM technologies—such as stereolithography (SLA), selective laser sintering (SLS), fused deposition modeling (FDM), and direct metal laser sintering (DMLS)—in the context of rapid tooling applications. A systematic comparison is performed on key performance indicators, including dimensional accuracy, surface finish, material properties, production speed, and overall cost. Experimental test coupons and representative tooling inserts were fabricated via both polymer- and metal-based AM processes, followed by mechanical, thermal, and dimensional characterization. Results demonstrate that polymer-based routes (e.g., SLA and SLS) are well-suited for low- to medium-volume tooling where moderate mechanical strength suffices, while metal-based technologies (e.g., DMLS and binder jetting with post-sintering) deliver superior thermal stability and wear resistance required for higher-volume or higher-temperature molding operations. Cost–benefit analysis indicates that, for small-batch production of injection molds and sheet-metal forming dies (volumes up to ~1,000 parts), AM-enabled tooling can achieve 40–60% reductions in lead time and 20–45% reductions in total cost versus conventional tooling. Nonetheless, limitations such as anisotropic mechanical properties, post-processing requirements, and relatively higher per-unit material cost remain. This work concludes with recommendations for selecting the most appropriate AM technology depending on part complexity, required cycle life, and production volume, providing guidelines for engineers seeking to implement rapid tooling strategies in 2021 and earlier contexts.
Keywords
Additive manufacturing, rapid tooling, SLA, DMLS, tooling inserts, dimensional accuracy, cost analysis
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