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LARGE SCALE PRINTING SERVICES
Large Format 3D Printing with Less Assembly & Faster Iteration
Partner with Unionfab — China's largest 3D printing service provider, when a part is too large for standard printers, too expensive to tool, too slow to fabricate conventionally, or too complex to build from many bonded pieces.
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TECHNOLOGIES & MATERIALS
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80+ engineering plastic materials and metal alloys.
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Four questions we hear before every large-scale order
When customers contact Unionfab for large-scale 3D printing, they usually start with questions like: Can you print this in one piece? If not, how will Unionfab section and finish it? Which process fits my part? How do you ship it? Here is how we answer.
Can this be printed in one piece?
Yes — up to 2100 × 700 × 800 mm in a single continuous build envelope. For parts beyond any single machine limit, we engineer the split, not just bond the pieces.
If not, how will it be sectioned?
We plan splits at structural and geometric positions that hide the seam. Internal alignment keys, controlled mating surfaces, and post-finishing ensure the joint disappears — visually and structurally.
Which process fits my part?
SLA for surface-critical display parts. FDM for large structural forms and fixtures. SLS for functional nylon geometry. And SLM for metal parts first. We route by your outcome — not by which machine is available.
How do you handle shipping for large parts?
Packaging, surface protection, crating, and freight are planned as part of the order — not handled after the part comes off the machine. We ship to 170+ countries with large-format logistics experience.
Cost Drivers of Large-Scale 3D Printing
Large-scale 3D printing cost is not based on size alone. The final price depends on material use, machine time, process choice, sectioning, finishing, tolerance needs, quantity, packing, and shipping.
Part Size & Material Use
Larger parts often use more material and machine time. Wall thickness, solid areas, supports, internal features, and surface area also affect cost.
Process & Material Choice
- SLA suits smooth display parts;
- FDM is often more cost-effective for large mockups and fixtures;
- SLS/MJF fits functional nylon parts;
- SLM metal printing usually costs more due to material, support, and inspection needs.
One-Piece vs. Sectioned Printing
One-piece printing can reduce seams and assembly risk, but may require a larger machine. Sectioned parts add split planning, alignment, bonding, reinforcement, and seam finishing.
Surface Finishing
Sanding, filling, coating, priming, painting, polishing, and seam blending add labor and lead time, especially for display or customer-facing parts.
Tolerance & Functional Needs
Tight fits, mating surfaces, threaded inserts, load-bearing areas, heat resistance, or testing requirements may require extra review, inspection, post-machining, or reinforcement.
Quantity, Packing & Shipping
Quantity can affect setup and finishing efficiency. Oversized parts may also need custom protection, crating, and freight planning.
Four Large-Scale 3D Printing Technology Routes
Route A: Surface-first
Large SLA Resin 3D Printing
Best when large parts need smooth surfaces, fine details, high visual quality, and a presentation-ready appearance.
Best for: Large visual models, display figures, exterior panels, exhibition props, sculptural parts, and appearance prototypes
- Single-build envelope: Up to 2100 x 700 x 800 mm
- Standard Tolerance: L < 100 mm: ±0.1 mm; L ≥ 100 mm: ±0.1% x L ; Z-Axis Tolerance: ≤±0.08 mm
- *Lead Time: 3-4 days (800 x 800 x 550 mm)
- Materials: Somos Performance/LEDO Resin, High Detail Resin, Rigid Resin, Nylon-like Resin etc.
- Tradeoff: Less suitable for heavy-load or high-temperature end-use applications
Route B: Scale-first
Large FDM/FFF 3D Printing
Best when budget, overall envelope size, and speed matter more than a premium cosmetic surface.
Best for: Big mockups, fixtures, full-size prototypes
- Single-build envelope: 1000 mm x 1000 mm x 100 mm
- Standard Tolerance: ±0.2 mm
- *Lead Time: 5-7 days (610 x 508 x 508 mm)
- Materials: ABS, PETG, PC, PET-GT, ASA, Ultem etc.
- Tradeoff: Coarser surface
Route C: Function-first
Large SLS/MJF Nylon&TPU 3D Printing
Best when the part needs more functional nylon behavior, stronger geometry freedom, and less concern about showroom surface quality.
Best for: Large nylon housings, ducts, covers, fixtures, functional prototypes, and lightweight assemblies.
- Single-build envelope: Up to 680 x 360 x 550 mm (SLS); 380 x 380 x 280 mm (MJF)
- Standard Tolerance: ±0.3 mm
- *Lead Time: 3-4 days (350 x 350 x 410 mm); 2-3 days (380 x 280 x 380 mm)
- Materials: Nylon(carbon-filled, glass-filled, flame-retardant), TPU etc.
- Tradeoff: Grainier finish
Route D: Metal-first
Large SLM Metal 3D Printing
Best when the final part or assembly requires real metal properties, including load-bearing strength, heat resistance, wear resistance, or end-use mechanical performance.
Best for: Metal brackets, structural sections, housings, tooling components, heat-resistant parts, and metal assemblies
- Single-build envelope: Up to 2050 x 2050 x 1000 mm
- Standard Tolerance: ±0.2 mm
- *Lead Time: 5-8 days (400 x 300 x 400 mm)
- Materials: Aluminum (AlSi10Mg, 6061), Stainless Steel(316L, 17-4PH), Titanium(TC4), CuCrZr, Inconel 625 etc.
- Tradeoff: Higher cost, longer lead time
Lead times above are for reference only and may vary depending on the specific project.
Choosing the Right Production Route for Oversized Parts
Large-scale 3D printing is not only about printer size. For oversized parts, Unionfab helps determine whether the best route is a one-piece build, an engineered multi-section assembly, or a hybrid plan combining additive manufacturing with CNC machining, vacuum casting, sheet metal, or other processes.
Print in one piece when seam risk is unacceptable
Best for display shells, exterior panels, form-critical models, and geometries where sectioning may create visible joints, weak interfaces, or extra finishing risk.
Engineered Sectioning Beyond Build Limits
When a part is larger than the selected process can print in one build, Unionfab plans seam placement, joining method, alignment features, finishing, packing, and transport before production.
Change or combine processes when printing is not the best answer
Some areas may be too load-bearing, heat-exposed, tolerance-critical, or production-volume-driven for the same 3D printing route. In these cases, Unionfab can recommend CNC machining, vacuum casting, sheet metal fabrication, rapid tooling, or a hybrid approach.
Plan downstream handling from the start
Oversized parts add complexity to sanding, painting, insert installation, packing, freight, and onsite assembly. Unionfab makes these requirements visible during quoting so cost, lead time, and delivery risk are clear early.
Engineered Sectioning & Seam Finishing
For oversized parts, sectioning is more than cutting a model into smaller pieces. A good split plan considers appearance, strength, assembly access, finishing workload, and shipping constraints before printing begins.
Place seams where they create the least visual and structural risk
Unionfab avoids joints in cosmetic focal areas, high-stress zones, tight-tolerance interfaces, or surfaces that are difficult to sand, fill, or paint after assembly.
Design alignment into the assembly
Instead of relying only on adhesive bonding, sections can use alignment keys, locating features, controlled mating surfaces, inserts, fasteners, or reinforcement features depending on the material and application.
Finish the assembly as one final part
For appearance-grade projects, joining is followed by filling, sanding, priming, painting, coating, or other surface treatments to reduce visible seams and create a more unified final appearance.
Post-Processing Options for Large-Scale 3D Printing
Sanding
Smooths large printed surfaces, reduces visible layer lines, and removes support marks before finishing.
Best For: Visual prototypes, display models, large exterior panels, and parts that need a cleaner surface before painting.
Unionfab Case Studies of Large-Scale 3D Printing
Large-scale 3D printing is widely used for oversized prototypes, exhibition models, display figures, automotive parts, industrial fixtures, architectural models, sculptural pieces, and functional assemblies. Whether the project requires a one-piece build or an engineered multi-section assembly, Unionfab helps match the right process, material, finishing method, and delivery plan to the final application.
AutomotiveFDM
One-Piece FDM Automotive Door Prototype
- Application:
- Automotive sample door / structural mockup
- Process:
- Large FDM / FFF
- Build Strategy:
- One-piece printing
- Result:
- Full-size prototype for form validation, fit review, and handling tests
FAQs about
Large-Scale 3D Printing
Unionfab supports large-format 3D printing with build sizes up to around 2 meters for SLA parts, depending on the selected process, material, and part geometry. For exact size limits, please upload your file for review.
Unionfab offers materials such as standard resin, high-performance SLA resins, MJF Nylon 12, SLS Nylon 12, and selected metal materials including 316L stainless steel and aluminum AlSi10Mg. Available materials depend on the printing process and application requirements.
Accuracy depends on the process, material, part size, and geometry. For SLA parts: Standard Tolerance will be L < 100 mm: ±0.1 mm & L≥100 mm: ±0.1% x L; Z-Axis Tolerance will be ≤±0.08mm.
Lead time depends on part size, complexity, material, and finishing requirements. Some SLA parts can be produced within a day, while larger or more complex projects may take longer, especially if post-processing such as painting, polishing, or plating is required.
Cost is mainly affected by printing technology, material, part size, model complexity, required accuracy, production quantity, and post-processing needs. Uploading your 3D model is the best way to get accurate pricing and lead time.
Yes. Unionfab provides early-stage DFM review before order confirmation to help identify potential issues with geometry, tolerances, material compatibility, and manufacturing feasibility.
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