Volumetric 3D Printing

Question 1

Name of the host?

Answer 1

Amanda Deisler

Question 2

Name of the channel and show?

Answer 2

Channel: Seeker
Show: Elements

Question 3

Where did the method come from?

Answer 3

UC Berkely and Lawrence Livermore National Lab

Question 4

Name of the new method of Volumetric 3D Printing?

Answer 4

Computed Axial Lithography

Question 5

Name of the man who is constantly talking?

Answer 5

Hayden Taylor (Assistant Professor UC Berkeley, Mechanical Engineer)

Question 6

What is this new category of additive manufacturing?

Answer 6

Volumetric 3d Printing

Question 7

How is Volumetric 3D Printing done?

Answer 7

All points of a 3D object are created simultaneously. opposed from building up geometry layer by layer

Question 8

What is the thing that they created?

Answer 8

The THINKER in yellow resin

Question 9

What is the advantage of this new technique?

Answer 9

Can print objects with complex geometry, such as no symmetrical sides and no hard staircase edges

Question 10

What is something unique about this process that other processes were not able to do?

Answer 10

Overprinting - take objects and print around them

Question 11

What was the example used to showcase overprinting?

Answer 11

Printing a handle on the metal part of a screwdriver

Question 12

What is another additive manufacturing process that is mentioned?

Answer 12

Stereolithography (SLA)

Question 13

How is SLA done, and why is it not considered volumetric printing?

Answer 13

They use a bath of resin and solidify (using photopolymerization) the part layer by layer as it is pulled upwards.

Question 14

What is the Volumetric 3D printing method that they created?

Answer 14

Computed Axial Lithography (CAL)

Question 15

Benefits of CAL?

Answer 15

Prints objects within minutes and prints the object all at once as well

Question 16

When was the 1st proof of principle of CAL done?

Answer 16

In 2017 between the Lawrence Livermore National Lab, MIT, UC Berkeley, and University of Rochester

Question 17

What was the early concept of CAL like?

Answer 17

It used 3 intersecting stationary beams where the points they intersected would solidify the resin

Question 18

What did Hayden’s team use to transform the initial concept to be more versatile?

Answer 18

They reference how a CT Scanning Machine worked and reversed it to create objects instead of measuring them

Question 19

By getting all the dimensions of a 3D object, what did Haydens do with it?

Answer 19

They put it in a DLPP or Digital Light Processing Projector, but its just an ordinary projector from a store

Question 20

So how does CAL work?

Answer 20

As the resin-filled jar rotates slowly at a controlled speed, the projector projects the desired 3D image that is also rotating. The light is beamed on the resin is also controlled to make sure only specific parts solidify

Question 21

Since the resin is an integral part of the process, what is it & what is it made of?

Answer 21

Its Gelatin Methacrylate Hydrogel and its made of liquid polymers, Photoinitiators, and oxygen and the gel must be at room temp

Question 22

What problems could occur when the molecules of the photoinitiators become reactive?

Answer 22

They can interact with the oxygen and become QUENCHED which is when reactive molecules top being reactive

Question 23

What does Hayden mean that there is a threshold for light in CAL?

Answer 23

Its the presence of oxygen that creates a threshold meaning that oxygen must be consumed before solidification

Question 24

What is the molecular process that creates the objects

Answer 24

Polymerization

Question 25

What are some of the benefits of the resin used in Computed Axial Lithography?

Answer 25

The resin is a flexible material to work with since it is cheap, malleable, and reusable

Question 26

What are some example said that CAL could possibly create?

Answer 26

Customize sports equipment, tools, lenses, or even prosthetic devices.

Question 27

What is the scale so for CAL?

Answer 27

Its in Centimeters

Question 28

What is the big question asked at the end for CAL?

Answer 28

What about BIOCOMPALIBILITY?