Material Jetting

Question 1

What is Material Jetting?

Answer 1

Droplets of build material are selectively deposited

Question 2

5 stages of material jetting process

Answer 2

1. Droplet ejection
2. Droplet flight
3. Drop impact
4. Drop spreading
5. Drop solidification

Question 3

Continuous flow system?

Answer 3

a) Electromechanical deice causes pressure oscillations to propagate the fluid through a nozzle, jet then breaks into droplets. Electrostatic field charges droplets. Charged drops directed to location.

Question 4

Drop on Demand

Answer 4

b) Actuator produces pressure pulses in the nozzle producin individual droplets

Question 5

What actuators?

Answer 5

1. Thermal

2. Pizoelectric

Question 6

Materials?

Answer 6

Polymers and waxes

• Metals and Ceramics

Question 7

Strengths

Answer 7

 Good part edge quality
 High resolution
 Multi-materials possible; Multiple heads print diff mats, Functionally graded mats, Different mechanical prop, Dissolvable support structures

Question 8

Weaknesses

Answer 8

 Limitations on the material properties