Volumetric 3D Printing Flashcards
Name of the host?
Amanda Deisler
Name of the channel and show?
Channel: Seeker
Show: Elements
Where did the method come from?
UC Berkely and Lawrence Livermore National Lab
Name of the new method of Volumetric 3D Printing?
Computed Axial Lithography
Name of the man who is constantly talking?
Hayden Taylor (Assistant Professor UC Berkeley, Mechanical Engineer)
What is this new category of additive manufacturing?
Volumetric 3d Printing
How is Volumetric 3D Printing done?
All points of a 3D object are created simultaneously. opposed from building up geometry layer by layer
What is the thing that they created?
The THINKER in yellow resin
What is the advantage of this new technique?
Can print objects with complex geometry, such as no symmetrical sides and no hard staircase edges
What is something unique about this process that other processes were not able to do?
Overprinting - take objects and print around them
What was the example used to showcase overprinting?
Printing a handle on the metal part of a screwdriver
What is another additive manufacturing process that is mentioned?
Stereolithography (SLA)
How is SLA done, and why is it not considered volumetric printing?
They use a bath of resin and solidify (using photopolymerization) the part layer by layer as it is pulled upwards.
What is the Volumetric 3D printing method that they created?
Computed Axial Lithography (CAL)
Benefits of CAL?
Prints objects within minutes and prints the object all at once as well
When was the 1st proof of principle of CAL done?
In 2017 between the Lawrence Livermore National Lab, MIT, UC Berkeley, and University of Rochester
What was the early concept of CAL like?
It used 3 intersecting stationary beams where the points they intersected would solidify the resin
What did Hayden’s team use to transform the initial concept to be more versatile?
They reference how a CT Scanning Machine worked and reversed it to create objects instead of measuring them
By getting all the dimensions of a 3D object, what did Haydens do with it?
They put it in a DLPP or Digital Light Processing Projector, but its just an ordinary projector from a store
So how does CAL work?
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
Since the resin is an integral part of the process, what is it & what is it made of?
Its Gelatin Methacrylate Hydrogel and its made of liquid polymers, Photoinitiators, and oxygen and the gel must be at room temp
What problems could occur when the molecules of the photoinitiators become reactive?
They can interact with the oxygen and become QUENCHED which is when reactive molecules top being reactive
What does Hayden mean that there is a threshold for light in CAL?
Its the presence of oxygen that creates a threshold meaning that oxygen must be consumed before solidification
What is the molecular process that creates the objects
Polymerization
What are some of the benefits of the resin used in Computed Axial Lithography?
The resin is a flexible material to work with since it is cheap, malleable, and reusable
What are some example said that CAL could possibly create?
Customize sports equipment, tools, lenses, or even prosthetic devices.
What is the scale so for CAL?
Its in Centimeters
What is the big question asked at the end for CAL?
What about BIOCOMPALIBILITY?
