Full Project (PDF):
Determine the capability of silicones in the additive manufacturing process to allow for customizable solutions in the medical, aerospace, automotive, electronic, and consumer industries. Expand the market for Momentive silicones.
- Incorporate UV light into the print system and determine the kinetics of curing with the UV light.
- Validate that UV LSR can be used in the direct writing process.
- Test geometrical and mechanical properties of RTV and UV LSR samples.
- Determine write speed and syringe pressure for various sized syringe tips.
- Print RPI keychains using UV LSR.
- Power law relationship
- η = mn-1, n and ma are material constants
- Mass flow rate: w = (ΔPR/2mL)1/n
- Frictional effects neglected in the model
- Pneumatic system, limited pressure
- UV light and cable mount
- Tack free time tests
- Spot cure time tests
- Enclosure for 3D printer
- CAD model of part
- Modification of G code
- Bead‐to‐bead spacing
- Delays and z‐lifts to reduce stringing
Recommendations and Future Work
- Implement external control of the UV source
- Use a lower viscosity or shear thinning silicone
- Print with higher resolution and speed
- Implement a second extrusion for support material
- Determine homogeneity of mixed material
- Sell base and catalyst in separate cartridges which mix upon extrusion
Manufacturing, Automation, and Control