Heat exchangers: the first real proving ground for metal AM in aerospace
Metal additive manufacturing in aerospace is the use of 3D printing processes to build high-performance metal components layer by layer, enabling complex internal geometries, integrated functions, and production-ready parts that are difficult or impossible to fabricate with traditional methods. Heat exchanger 3D printing is the clearest sign that metal additive manufacturing aerospace projects are moving beyond experimentation and into aerospace AM production. Conflux Technology built its entire business on this bet a decade ago, when the company was founded around the idea that heat exchangers are among the best applications for metal additive manufacturing. Their logic was straightforward: thermal management hardware demands intricate internal channels, high surface area, and tightly controlled flow paths that conventional machining and brazing struggle to deliver. If AM could not win here, it probably did not deserve to be called a production technology.
Why heat exchangers fit metal AM better than legacy manufacturing
Heat exchangers expose the real advantage of metal additive manufacturing aerospace programmes: geometry, not novelty. Founder Michael Fuller, drawing on his time in Formula One, singled out heat exchangers as the application where metal 3D printing held a clear edge over traditional manufacturing methods. Complex internal channels, large surface areas, and demanding cooling requirements make these parts textbook candidates for heat exchanger 3D printing. With conventional techniques, engineers are forced into compromises—stacked plates, multiple brazed joints, and conservative layouts that add weight and limit performance. Additive manufacturing scaling flips that trade-off. Entire heat exchangers can now be printed as single or modular structures, with tailored flow paths and integrated features, and that shift is becoming common rather than experimental. The message is blunt: if you are still designing these components for old processes, you are leaving performance on the table.
From hype to aerospace AM production: Conflux’s long game
Conflux’s story is a quiet rebuke to the hype cycles that once surrounded metal 3D printing. The company was founded in 2015 to pursue a single hard problem—additively manufactured metal heat exchangers—and then spent almost a decade refining designs and processes before the aerospace market caught up. Today, CEO Dan Woodford says that the long-term bet is paying off as intent turns into action and additive becomes a serious part of next-generation aircraft design. That is not marketing spin; Conflux is already producing hundreds of heat exchangers annually for automotive and other non-aerospace customers, with a long-term goal to scale into the thousands and replicate its manufacturing systems beyond a single facility. The quotable bottom line from Woodford is that “the intention is converting into action,” as additive is deliberately written into major development programs from the outset.
Certification and scaling: why more printers are not the answer
The hard part of metal additive manufacturing aerospace adoption is no longer proving that a printer can make a cool part; it is proving that the system can deliver certified, repeatable, auditable production. Woodford notes that companies are now treating certification as a concrete task rather than a distant ambition, shifting the conversation from whether AM can do the job to how it will be qualified, certified, and placed into service. That shift exposes a harsh truth about additive manufacturing scaling: buying more machines is the easy bit. Scaling means building an end-to-end production system with the right designs, consistent manufacturing, depowdering, post-processing, inspection, and quality systems all working together. This is where heat exchanger 3D printing is forcing discipline; aerospace customers will not sign off without proof that every build, not just the glossy demo part, meets spec.
What comes next: modular parts, larger builds, and real flight hours
The next phase for aerospace AM production is less about new slogans and more about getting parts into the sky, hour by hour. Conflux is already working across aerospace and defense, contributing to hydrogen-powered aircraft initiatives and participating in thermal management programs for future regional aircraft. A practical problem remains: many of the heat exchangers needed for aircraft are larger than current metal printers can handle in a single build. Conflux has responded by creating modular designs composed of multiple printed sections that are joined into a single component, a strategy already deployed in aviation test programs and set to continue. Longer term, large-format machines will be needed to unlock maximum performance. For now, defense systems, drones, and advanced air mobility platforms—which have faster approval paths—are giving these parts their first real flight hours, while commercial aviation advances more slowly but steadily toward adoption.
