Smart & Sustainable RTM 4.0 Project Advances High-Rate Production for Large Composite Structures

Why It Matters

The breakthrough accelerates sustainable, cost‑effective production of large aerospace composites, giving manufacturers a competitive edge as demand for greener, higher‑volume aircraft rises.

Key Takeaways

• Integrated sensors enable real-time RTM process control.
• Induction heating cuts cycle time and energy use.
• Dry fiber placement reduces material waste and storage needs.
• Digital thread links simulation, monitoring, and production data.

Pulse Analysis

The aerospace sector has long relied on labor‑intensive hand lay‑up and autoclave curing to build carbon‑fiber components, processes that limit throughput and inflate carbon footprints. Resin transfer molding (RTM) offers a pathway to higher volume manufacturing, yet scaling the technique to large, structurally complex parts has remained elusive. The SAUBER 4.0 initiative tackles this gap by marrying RTM with advanced dry‑fiber placement, tailored fiber placement, and 2‑component epoxy chemistries. This combination not only simplifies material handling but also opens the door to producing integral wing‑tip and spar sections in a single, continuous cycle.

Central to the project’s success is an end‑to‑end digital thread that captures data from the moment resin is injected to the final cure. High‑resolution sensors embedded in the tool monitor flow fronts, resin temperature, and permittivity, feeding live information to a SCADA system for automatic process adjustments. Complementary induction coils and mats deliver rapid, uniform heating, slashing cycle times while cutting energy consumption by an estimated 30 % versus conventional RTM. The real‑time feedback loop also validates simulation models, reducing trial‑and‑error and boosting overall manufacturing robustness.

With the technology now qualified for Airbus’s Stade plant, the implications extend beyond a single supplier. The ability to produce large, complex CFRP structures at higher rates aligns with the industry’s push toward single‑aisle aircraft that are lighter, more fuel‑efficient, and cheaper to operate. Moreover, the elimination of cold‑storage‑dependent 1K resins and the adoption of 2K systems lower logistics costs and environmental impact. As regulators and airlines tighten sustainability mandates, SAUBER 4.0 provides a scalable, digital foundation that could become the new standard for composite aerospace manufacturing worldwide.