3D Printing

Question 1

What is the concept of 3D printing

Answer 1

Additive manufacturing (Turning raw material into a defined thing with little waste)

Question 2

What’s the difference between additive and subtractive manufacturing

Answer 2

• Additive manufacturing build things layer by layer from raw material
• Subtractive manufacturing removes material to create parts.

Question 3

What is cross-linking

Answer 3

Through heat, chemical or light, the polymers are linked together by covalent bonds to make a stronger and more durable shape.

Question 4

What is SLA

Answer 4

Steriolithography

Question 5

What is FDM

Answer 5

Fused deposition modeling

Question 6

Difference of the quality between SLA and FDM

Answer 6

• SLA using laser beam produces more precise and resolution of the product, smooth surface
• FDM still has some visible layers by layers on the surface, takes longer time

Question 7

What is the preprocessing for both printers

Answer 7

For FDM try to have a mold or bridge so the layers can be built over and for SLA adjust the xyz plane

Question 8

Difference in post-processing of the 2 printers

Answer 8

• SLA needs to be washed in an alcohol solvent to remove excess resin on the surface, then curing.
• FDM doesn’t need to be washed, but instead the support part is removed before being sanded.