Additive Manufacturing

3D Printing

https://en.wikipedia.org/wiki/3D_printing

1. Metal Printing

Powder bed fusion

Requires post printing heat treatment: annealing at high temperature

Example part https://gpiprototype.com/metal-3d-printing#prev

https://www.3dhubs.com/knowledge-base/introduction-metal-3d-printing/

2. Plastic Printing through Extrusion

Setting up the printer: https://www.instructables.com/id/3D-Printing-Hacks/

Filament Materials https://www.prusa3d.com/material-guides/

• PLA, low cost, good heat resistance, good finish, has odor and heavy warping when printing,
• ABS, low cost, good strength, not durable, not outdor, low heat resistance
• Flex, TPE or TPU, felxible, durable, difficult to print, less strength
• Carbon can be added to PLA and ABS to increase strength
• PETG, Nylon, Polycarb, Polyprop

Hazards: fine particles, VOCs

3. Photopolymerization

How does it work?

Objet printers: https://www.stratasys.com/3d-printers