1 Introduction
2 Large-format polymer extrusion-based deposition systems
2.1 AM processes for polymers
2.1.1 Material jetting
2.1.2 Powder bed fusion
2.1.3 Binder jetting
2.1.4 Vat polymerization
2.1.5 Material extrusion
Am family | Brand/model | Dimensions (mm) | Volume (m3) | Layer height (µm) |
---|---|---|---|---|
Material jetting | Mimak/3DGD-1800 | 1450 × 1110 × 1800 | 2.90 | 800 |
Powder bed fusion | TPM3D/S800DL | 800 × 800 × 450 | 0.29 | 60–300 |
Binder jetting | Voxeljet/AG VX1000 | 1000 × 600 × 500 | 0.30 | 150 or 300 |
Vat polymerization | Materialize/ | 2100 × 800 × 700 | 2.1 | 100 |
Material extrusion [filament] | ATMAT/Jupiter | 2000 × 1000 × 1000 | 2.00 | 200* |
Material extrusion [pellets] | Thermwood/LSAM 1540 | 12 190 × 4570 × 1520 | 84.60 | 5 000* |
Small format AM | LFAM | ||
---|---|---|---|
MSAM | HSAM | ||
Build volumes (m3) | < 1 | 1–7 | > 7 |
Deposition rates (kg/h) | < 0.5 | 0.5–4 | 4–50 |
Cost ($/Kg) | 100–200 | 4–10 | 4–10 |
Raw material | Filament | Pellets | Pellets |
Extruder diameter (mm) | 0.1–1 | 0.5–4 Variable | 4–7.6 Variable |
Number of extruders | Single | Single Multiple | Single Multiple |
Energy requirements (J/kg) | High | Low | Low |
Surface quality | Medium | Low | Low |
Motion | Cartesian, polar | Cartesian, polar | xy table and z axis, robotic arms |
Bonding | Hot air plastic welding, Ultrasonic spot welding | Plastic seams | Plastic seams |
Slicing methods | Established | New | New |
Materials | Thermoplastics and thermoplastics reinforced with short fibers | Thermoplastics reinforced with short fibers | Thermoplastics reinforced with short-fibers and thermosets |
2.2 Systems configurations for extrusion systems
2.2.1 Robotic arms
2.2.2 Pellets
2.2.3 Multiple and adaptable nozzles
2.2.4 Multiple extrusion heads/modular and cooperative manufacturing
2.3 Process control
2.3.1 Thermal
2.3.2 Design for AM and modeling approaches
2.3.3 In-process control
2.4 Materials for LFAM
2.4.1 2.4.1. Fiber reinforced materials
2.4.2 Reactive polymers
2.4.3 Multi-material and/or functionally graded materials
3 Large-format polymer extrusion deposition—applications
Industry | Market share (%) |
---|---|
Aerospace | 16 |
Automotive | 16 |
Academic institutions | 14 |
Medicine | 14 |
Consumer products and electronics | 13 |
Energy | 11 |
Army | 7 |
Construction | 6 |
Others | 3 |
3.1 Aerospace
3.1.1 Aircraft interior and cabin parts
3.1.2 Aerodynamic models and Mockups
3.1.3 Surrogates
3.1.4 Prototypes
3.1.5 Molds and tooling
3.1.6 UAVs
3.1.7 Rockets
3.2 Automotive
3.2.1 Components for cars
3.2.2 Electric vehicles
3.2.3 Prototypes
3.2.4 Molds and tooling
3.3 Naval
3.4 Academic applications
3.5 Construction sector
3.5.1 Architectural models
3.5.2 3.5.2 Houses
3.5.3 Window frames
3.5.4 Furniture and decorative items
3.5.5 Molds for off-site construction
3.6 Energy sector
3.6.1 Wind turbines
3.6.2 Hydropower components
3.6.3 Magnets
3.6.4 3.6.4 Molds
Sectors | Applications | |
---|---|---|
Aerospace | Aircraft interior and cabin parts China Eastern Airlines Spare newspaper holders and electronic flight bag supports [116] China Eastern Airlines Air grill—Lufthansa Technik [118] Spacer Panel – Airbus [118] Curtain Header – Diehl Aviation [119] Airbus A320 sidewall – Etihad Airways [120] Prototypes Marshall Aerospace and Defence—Ducting adapter [125] NASA – Inlet guide vanes (IGVs) and acoustic liners [124] Taylor-Deal Automation Fluid and air handling parts [123] | Molds and Tooling Advanced Composite Structures – Layup tools [123] Piper Aircraft – Polycarbonate Hydroforming Tools [123] Airbus – Autodesk – Plastic mold for a partition wall [118] BAE Systems [126] CARACOL [127] Additive Engineering Solutions [128] Rockets Lockheed – Rocket Fuel Tanks [130] 3D Printed Rocket Thrusters [132] United Launch Alliance –ECS duct system [131] Unmanned Aerial Vehicles Aurora Flight Sciences [129] Surrogates Bell Helicopter [123] |
Automotive | Components for Cars Urbee Car [133] Electric Vehicles Strati Car [134] LM3D Swim [135] YOYO [136] Project Chameleon Platform [137] Nikola Corporation (EV Trucks) [138] | Motorcycles Fender and Fork Covers [139] Prototypes 3-D-Printed Shelby Cobra [140] ORNL Utility Vehicle [141] Ford – Stratasys [142] Airless tires [143] |
Naval | Submarine Hull [147] WC Cabins [44] | Drones- Dive Technologies [148] Molds [149] |
Academic applications | Prototypes Excavator Cabin [150] Embankment Dam Model [151] | Bioderived Materials PLA reinforced with Poplar fibers [153] |
Architecture and construction | Architectural Models BCN3D – SUNTEM 3D [156] BigRep STUDIO [157] Houses Canal House in Amsterdam (Kamer Maker) [158] AMIE structure (ORNL BAAM system) [159] Qingdao Unique Products [160] | Windows [161] Furniture and Decorative items Skanska cladding [8] Off-site Construction Concrete Molds [163] |
Energy | Wind Turbines Prototypes [165] Horizontal wind turbine blades [166] Vertical Wind Turbines Diverters [167] Nacelle covers [170] | Hydropower Turbine Components [171] Tubes [172] |
4 Challenges and opportunities
5 Conclusions
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Current available AM systems for large polymer parts (> 1 m3) are mostly based on extrusion methods. These AM systems are commonly expensive (up to 400 K), and the ones based on the FFF technology are characterized by relative low deposition rates (\(<\) 0.5 kg/h).
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Several solutions have been proposed to overcome the limitations of these systems, namely the use of machines with robotic arms, adaptable nozzle sizes, or multiple and independent extrusion heads.
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Nowadays, the utilization of AM for the fabrication of medium and large polymer parts is already a trend in many activity sectors.