The Advantages of 3D Printing in the Nautical Industry

3D Printing for Nautical Applications with MadeInAdd: Exploring the Potential of Additive Manufacturing for the Construction and Repair of Boats, Components, and Naval Furnishings

Interview with Federica Schieppati, Senior Customer Development Specialist at MadeInAdd, by Franco Astore

In the marine industry, 3D printing is playing an increasingly crucial role in the fast production of lightweight and durable custom parts with outstanding aesthetic and functional properties. However, possessing the operational know-how required for additive production in this field is no easy feat. This is where companies like MadeInAdd step in. “The more complex the components to be produced, the more the results depend on the virtuous interaction between the platform and specialized consultancy,” begins Federica Schieppati, Senior Customer Development Specialist at MadeInAdd.

Qualified Materials‍

Additive manufacturing is widely used in the marine sector. Fused Deposition Modeling (FDM) systems range from traditional formats (up to one cubic meter) to large-format LFAM (up to 6x6 meters), which are suitable even for large-scale production.
Material choice depends on the technology, but generally speaking, ASA—an amorphous styrenic polymer—is a top choice for its natural UV resistance. Other popular materials for their mechanical strength include ABS CF (carbon fiber-reinforced ABS), RPP (a recycled polypropylene), Dahltram CF (a carbon fiber-reinforced thermoplastic resin), and glass fiber-reinforced ABS (ABS GF).

3D Printing in Nautical Manufacturing‍

Selective Laser Sintering (SLS) and Multi Jet Fusion (MJF) are among the additive manufacturing methods best suited to the needs of the marine sector. Both technologies use nylon powders, such as PA12 or PA11 (the latter being bio-based), often reinforced with carbon or glass fibers.

These can be paired with a vapor smoothing process—a chemical-thermal treatment that seals the surface pores and makes parts smooth and waterproof. Vapor smoothing is limited to small parts produced with SLS or MJF. For larger pieces, waterproofing is achieved through specific paints and resins.
Parts like dashboard display covers often undergo such surface treatments. Every boatyard demands different aesthetics and functionality, requiring customized finishes.
Another finishing technique appreciated by MadeInAdd's clients is sanding—a process used to smooth FDM prints and remove visible filament layering.
“After sanding,” explains Schieppati, “we apply layers of gel coat or filler, then finish with paint—either standard white or custom RAL shades.”

Real-World Applications‍

In the marine industry, the applications of 3D printing are virtually endless, as there are no real geometric limitations.
“The designer,” says Schieppati, “is free to express ideas for building a T-top, a control console, an air intake grille, or a hull-mounted part. We at MadeInAdd verify whether the design is printable or propose an optimized alternative from an additive manufacturing perspective.”

Optimization is essential, as print process constraints must be addressed during design. For instance, FDM systems use nozzles subject to gravity, requiring the use of supports or design changes to ensure functionality, aesthetics, and strength.
MadeInAdd’s engineering team provides targeted consulting, from feasibility analysis to redesign if needed to improve the final result.

One successful project involves an air intake grille installed on the transom of a fleet of luxury boats. The boatyard initially tried producing it via MJF, resulting in two parts that were glued together—but they lacked the required aesthetics and structural integrity.
MadeInAdd proposed a monolithic redesign using ASA and large-format FDM, which allowed the grille to be printed in one go. It was then sanded, filled, and painted in a custom black tone, ultimately delivered as an end-use component in multiple copies.

Other Projects‍

For a cruise ship hammam dome, MadeInAdd designed a segmented structure that could be transported and assembled on board. The dome was printed in FDM, treated with gel coat, and painted once installed according to the owner's aesthetic preferences.

Another standout project involved 3D printing deck columns for a ship. These tall, floor-to-ceiling columns featured alternating colored rings. MadeInAdd chose a multi-color FDM process that allowed each column to be printed in only two parts—significantly simplifying production, installation, and cost compared to traditional methods that required manufacturing each ring separately.

Additionally, MadeInAdd produced several spare engine parts using AlSi10Mg aluminum and DMLS 3D printing. These structurally complex components were installed inside the engine, where traditional methods would have failed due to geometric constraints. Here too, 3D printing enabled a streamlined process that met the specific and challenging requirements of marine environments.

The Additive Manufacturing Workflow‍

The digital platform plays a crucial role in initiating 3D production for simpler parts. As requests become more complex, interaction with MadeInAdd’s engineering team increases—starting from 2D drawings or 3D models.

While the platform allows users to upload files and receive instant quotes for basic operations, direct interaction with MadeInAdd’s engineers unlocks high-value consulting—essential for maximizing performance in complex or customized projects.
With consulting, the client submits a base file, which undergoes feasibility analysis. The team then identifies the optimal 3D printing technologies and materials, evaluates the need for hybrid processes (e.g., CNC milling or turning), and proposes redesigns if needed.

“The digital platform,” concludes Schieppati, “offers initial access to 3D printing services and instant quoting, but complex tasks like redesign and finishing are discussed with the client to find the best solution.”
Once the functional and aesthetic features are confirmed, the part is 3D printed, finished, and delivered—ready to be installed on board.

In conclusion, 3D printing’s potential for the production and repair of boats and marine components is now a proven reality. With this in mind, MadeInAdd continues to enhance its offering with scalable, sustainable, and accessible additive manufacturing solutions for vessels, furnishings, and marine parts.

(Translation from Italian, read the original article here published on Progettare by Meccanica Plus)

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