4. Additive processes with powder base material

Question 1

Binder jetting

Answer 1

solid particles are assembled by a liquid binder which is selectively distributed buy an inkjet print head

Question 2

Dis/Advantages Binder jetting

Answer 2

Fast
many materials appropriate
combination with classical sintering

poor accuracy and poor mechanical property without post processing

Question 3

Selective Laser Sintering and Melting

Answer 3

metallic, polymer or ceramic powder is selectively molten and consolidated by a laser beam

sintering - powder partly fused, melting otherwise

Question 4

Advantages of SLS/M

Answer 4

base material is easy to recycle
self-supporting powder
applicable to many different materials

Question 5

Electron beam direct manufacturing (EBDM)

Answer 5

electron beam moved by magnetic deflectors

consolidation by local fusion

Question 6

Dis/Advantages of EBDM compared to SLS/M

Answer 6

denser parts
higher build speed
less contamination

more expensive machines
limited to metals
less accurate

Question 7

Direct metal deposition (DMD)

Answer 7

metallic powder is deposited selectively by a nozzle and molten by a laser (liquid phase bonding)

Question 8

Dis/advantages of DMD compared to SLS/M

Answer 8

lot of DoF
mix materials

more expansive (5-axis machine)
less resolution

Question 9

Jet Fusion

Answer 9

polymer powder consolidated liquid phase sintering

fusing agent -> consolidation
detailing agent -> where not

Infrared flash is globally applied

Question 10

Dis/advantages of Jet Fusion

Answer 10

fast process
better mechanical properties than binder jetting
high resolution/precision

limited in material
long cooling period