presentation 3d-printing fundamentals & printing for healthcare

3D Printing for Healthcare

Roy van den Heuvel, 2015


Why? Fundamentals of 3D Printing 3D Printing for medical applicationsMaterials Examples Sources

“Growing up in a world that tells a lot of people what they cannot do and the desire to make a world where we tell little kids like me that they can do anything.”

Why?

Crossing the gap between Engineers & Doctors

Moving towards a Participatory Mindset

Sanders, 2008

Inspiration / hands-on experience for all stakeholders

van den Heuvel, 2014

Rapid application of new ideas and knowledge

Van de Beukering, 2014

Accessible, inexpensive and scalable complexity

Nervous System

Creative expression

Disney, 2015

Fundamentals of 3D Printing

• 3D Printing• 3D Software

3D Printing Methods

• FDM• Light Polymerized (SLA/DLP)• Powder Bed (SLS/SLM)• CLIP/other

Fused Deposition Modeling

• Affordable• Printers from EUR ~500,-• 30 EUR for 750g

• Speed• Accessible• Limited form freedom• Tinker-heavy


1. Extruder2. Layered filament3. (Heated) printbed

Cartesian: XYZ


Extruder Hotend Nozzle Fans


Filament Layers Infill Support


Printbed Temperature Surface Raft/Brim

Light Polymerization

• Bit pricey• Printers from 3K – 300K• 1300 EUR for 2kg (objet)

• Material choices• Resin-based (Support)• Form freedom• (semi-) Professional


• Resin deposition• Resin curing (UV/laser)• Post Processing


• Resin deposition• Resin layers• Multi Materials• Spray/Bath


• Resin curing• UV light (connex)• DLP • Laser (form1)


• Post Processing• Snap-off• Water-jet

Selective Laser Sintering

• Professional • Very pricey • High end results

• Lots of materials • Accurate• Powder based


• Powder deposition• Laser sintering• Reusable support


• Powder deposition• All kinds of powders

• Plastics• Metals• Ceramics• Composites

• Fragile


• Laser Sintering


• Laser Sintering• Strong bonds• Alloys


• Reusable Support

3D Modeling

CAD

Surface

Sketchup / 123D / etc.

Computer Aided Design


Parametric: constraints whose values determine the shape or geometry of the model

Design intent: how the creator of the part wants it to respond to changes and updates

Features: the shapes and operations that construct the part

Presenter

Presentation Notes

Parameters refer to constraints whose values determine the shape or geometry of the model or assembly. Parameters can be either numeric parameters, such as line lengths or circle diameters, or geometric parameters, such as tangent, parallel, concentric, horizontal or vertical, etc. Numeric parameters can be associated with each other through the use of relations, which allows them to capture design intent. Design intent is how the creator of the part wants it to respond to changes and updates. For example, you would want the hole at the top of a beverage can to stay at the top surface, regardless of the height or size of the can. SOLIDWORKS allows the user to specify that the hole is a feature on the top surface, and will then honor their design intent no matter what height they later assign to the can. Features refer to the building blocks of the part. They are the shapes and operations that construct the part. Shape-based features typically begin with a 2D or 3D sketch of shapes such as bosses, holes, slots, etc. This shape is then extruded or cut to add or remove material from the part. Operation-based features are not sketch-based, and include features such as fillets, chamfers, shells, applying draft to the faces of a part, etc.

Surface Modeling

3D Modeling Software

• CAD Solidworks, Autodesk Inventor, Fusion 360

• Surface Blender, 3DS MAX, Rhino (Grashopper)

• Beginner ThinkerCAD, 123D Design, Sketchup

3D Scanning

Materials (FDM)

• Plastics• PLA (Polylactic acid)• ABS (Acrylonitril-butadieen-styrene)• PET (Polyethylene terephthalate)• Nylon (Polyamide)• Flexible plastics (TPE with polyurethane base)

• Composites• Carbon Fiber• Metalfill (copper, brass, etc.)• Woodfill (bamboo, wood, etc.)• Others (coffee, beer, etc.)

Material Properties (FDM)

• Strength• Stiffness / Flex• Heat resistance / warp• Durability• Food Safe / Sterility• Support structures• Printing Temperature• Bed adhesion• Shrinkage

• Surface smoothness• Layer bonding• Print difficulty• Chemical resistance• Photosensitivity• Brittleness• Colors• Fumes• Cost

Material Properties (FDM)


• First stage• Prototyping for user impressions• Prototyping for ergonomics, functionality, aesthetics• Testing in non-medical or home-environment

• Second Stage• Implementing safety (electronic, mechanical, etc.)• Making it sterilizable (temp, UV, chem)• Tackling guidelines (ISO)• Medical Ethical Committees


For who are you designing? Medical Professionals (strict regulation) Home Care (medium regulation) DIY community (open source healthcare supplies) (no reg)

What is the use case? Tool Installation Wearable

Medical Grade

Medical Grade

Presenter

Presentation Notes

nylon (PA 12 Biocompatible Sterilizable

Non invasive Healthcare

Non invasive Healthcare

Mark Thielen, 2015

Open Source Community

Enablingthefuture.org


Hu-Go, Thingiverse


http://www.appropedia.org/

Sources

3D Print Models Thingiverse Youmagine Archive3D GrabCAD

3D printing tips & tricks https://www.simplify3d.com Troubleshooting Guide Learn.colorfabb.com Ultimaker Community Forums http://support.3dverkstan.se/article/30-getting-better-

prints

https://www.simplify3d.com/

http://support.3dverkstan.se/article/30-getting-better-prints

Cool stuff