Wednesday , January 20 2021

A new 3D printer would mean complete objects in one pass

3D printing has changed the way people are going to deal with the design, but to date they were limited to printing one layer at a time

3D printing has changed the way people deal with design, but most printers share a basic restriction: in essence, they build a layer of objects by layer, usually bottom up. However, this new UC Berkeley system creates them all at once, more or more, predicting video through a softly sensitive resin bottle.

The device, whose creators call the replicator (but because it is a MakerBot registered trademark), is not quite simple mechanical. It's hard to explain more than Hayden Taylor from Berkeley, who led the investigation:

"Basically, you have a commercial video projector, which I am literally bringing home, and then connecting it to a laptop and to use to project a series of computer images, while Motor turns a cylinder with a 3D printing resin. Obviously, there are lots of consoles: how the resin is shaped and, above all, how the images are projected calculate, but the obstruction to create a very simple image, the version of this tool is not as high ".

The use of light to print is not new: many devices use lasers or other forms of light that are discharged to the color and the material in the desired patterns. But they still do things one thin layer at a time. The researchers showed a similar "holographic" printing method using cross-light rays, but it is much more complicated. (Indeed, Berkeley worked with Lawrence Livermore on this project).

In Taylor's device, the reconstruction object will be scanned first and so it can be split into pieces, similar to a CT scanner, which is the technology that wakes up the imagination of the team in the first place.

By giving light to the resin light as it rotates, the material for the whole object is solved at least at the same time, or at least in a series of short revolutions instead of hundreds or thousands of drawing movements individual.

This has a number of benefits other than speed. The objects leave without problems, although there is some roughness in this prototype stage, and may have features and chavities that other 3D printers may have difficulties with. The resin can even improve for an existing object, as demonstrated by exposing treatment around a screwdriver shaft.

Naturally, different materials and colors can be exchanged, and rigid resin can be reused completely. There will be some time before it can be used to scale or to the degree of accuracy that traditional printers are doing now, but the benefits are convincing enough to almost certainly be realized alongside other techniques.

The article describing the new technique was published in the Science magazine.

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