Saturday , April 17 2021

This 3D CAL printer uses photosensitive liquids and beams of light



There is a new type of 3D printer in the city, and goes through the CAL name. This printer was created by a team at UC Berkeley, and its potential is huge. The most popular method for 3D printing at the consumer level at this time is one-to-one, through the merging of a material that has become a line. The new method we are seeing today is similar, but it causes the objects to be formed from a completely different angle.

The system we are looking at today goes through the name Computed Axial Lithography (CAL). Photopolymerization is used to create objects volumetrically. A photopolymer is a material (a polymer) that changes when exposed to light, in which case the polymer becomes solid when exposed to the right amount of light. With CAL, photopolymerisation shoots a beam of light in a large cup of this special liquid and becomes a hard object.

It's easier to see if you see it moving. Then you will see a video with a CAL machine moving. This new type of printer is not ready to run for consumer use, even for any type of public use. But it's real, and it's running right now.

This type of printer could outweigh most of the limitations of current custom printing methods. One of the ways in which this system exceeds the limitations of previously used methods is to print around pre-existing solid objects. Imagine having a tool that requires a new control: with this CAL system, the identifier could be printed directly to the tool.

Research on this method suggests that this method "can be used to avoid support structures as it can be printed on high viscosity fluids or even solid." CAL, they say, is scalable for large print volumes, and has several faster orders of magnitude, in a wider range of conditions than layer-by-layer methods.

Above you will see a collection of different objects printed with CAL. Extreme levels of complexity, manufacture of complex objects without the need for fabricated supports, soft materials and extremely soft finishes. Now, if I could only get one in my basement, so I can start printing a small army of alien action figures, we would look at it!

Also keep in mind – We've talked about this type of print before – in the form of a patent. Take a look at our article as of this January 2019 to see this printing technique print the letter M!

For more information on this topic, go to the Science journal where you can find the document "Manufacture of volumetric additives through tomographic reconstruction". The DOI code: 10.1126 / science.aau7114 marks the place, the place where the document is written by Brett E. Kelly, Indrasen Bhattacharya, Hossein Heidari, Maxim Shusteff, Christopher M. Spadaccini and Hayden K. Taylor.


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