Vat polymerization with CF alignment - Fortify3D
- 1. 1 VAT polymerization with CF reinforcement Magnetic Field-Assisted AM Fortify
- 2. 2 Learning goals for this presentation are; - Finding out how the Fortify technology works. - Understanding the underlying material science behind key features.
- 3. 3 Fortify technology - basics - Based on Digital Light Processing (DLP) and - Magnetic alignment of reinforcements for desired XYZ orientations per layer and voxel.
- 4. 4 Fortify technology - basics - Based on Digital Light Processing (DLP) and - Magnetic alignment of reinforcements for desired XYZ orientations per layer and voxel. - Reinforcements can consist (or be a mix) out of; - Carbon & glass Fibre - Metallics - Ceramics - Polymers - Matrix (Photopolymeric Resins) - Acrylate and Methacrylate-based (PMMA) (TP) - Epoxy-based (TS) - Cationic-based resins
- 5. 5 Trademarked Technologies Continuous Kinetic Mixing • Continuous Kinetic Mixing uniformly distributes the functional additives in the resin in order to achieve consistent material properties. Material is recirculated (and heated as required) throughout the printing process.
- 6. 6 Magnetic steering - Preprocessing non-magnetic fibres with nm sized iron-oxide particles to make them magnetic. - Creating the possibility to steer ±10 μm reinforcement particles
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- 9. 9 Advantages over other Technologies • Compared to other Vat polymerization technologies like SLA and DLP, Fluxprint allows for parts with greater mechanical performance along with print precision. • Compared to Chopped Fibre FDM technologies, Fluxprint allows for voxel based printing (10x resolution) and fibres orientation in the x,y or z direction.
- 10. 10 Shaping Freedom • Since chopped fibre is being used, in a homogenous mix with the resin, part design constraints are similar to that of other DLP printing technologies. • The only actual structural constraint is Z- direction reinforcement. Due to constraints on max layer height of the printing process, only short fibres can be placed in the z direction. • The printer’s minimum z resolution is 25μm, max layer height is undisclosed. Flux One
- 12. 12 Limitations - Printing speeds are around 1 min per layer of reinforcement orientations, this depends on; - Resin cure rate & viscosity - Particle size, volume fraction & orientations - Reinforcement size is constrained by maximum layer height. - Closed material source (buy from Fortify) - Interfacing between layers causes brittleness if larger volumes of homogenous orientation are used.
- 13. 13 Recommendations - Further study into improving inter boundary connection of fibers to improve overall interlayer performance. - Printing at multiple length scales (i.e. longer chopped fibre) creating hierarchical composites.
- 14. 14 References • Designing bioinspired composite reinforcement - architectures via 3D magnetic printing - Joshua J. Martin, Brad E. Fiore & Randall M. Erb • https://www.compositesworld.com/blog/post/magnetic- 3d-printing-the-next-generation-of-tailored-composites • https://3dfortify.com/magnetic-3d-printing-definition/