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Related: About this forumNew 3D printing method 25 to 100 times faster
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How "continuous" 3D printing actually works
There are a few different types of existing 3D printers, but they mostly work via the same principle: a printing head passes over a platform over and over, depositing layer after layer of a material like plastic in a precise pattern. Over time, these layers combine to form the desired object much like a paper printer forms text on a page by putting down row after row of ink.
By contrast, this new continuous 3D printer would do away with the layers entirely. Instead, a platform draws the object continuously out of a bath of liquid resin.
The resin solidifies when ultraviolet light hits it (a process called photopolymerization). So to create the desired item, a projector underneath the resin pool shoots UV light, in the form of a series of cross-sectional images of the object. Light, in a sense, is the blade that the printer uses to sculpt its products.
Meanwhile, oxygen prevents this reaction from occurring so to stop the object from simply hardening and sticking to the floor of the pool, there's a layer of dissolved oxygen there, creating an ultra-thin "dead zone" at the very bottom.
http://www.vox.com/2015/3/16/8227627/3d-printing-liquid-continuous
How "continuous" 3D printing actually works
There are a few different types of existing 3D printers, but they mostly work via the same principle: a printing head passes over a platform over and over, depositing layer after layer of a material like plastic in a precise pattern. Over time, these layers combine to form the desired object much like a paper printer forms text on a page by putting down row after row of ink.
By contrast, this new continuous 3D printer would do away with the layers entirely. Instead, a platform draws the object continuously out of a bath of liquid resin.
The resin solidifies when ultraviolet light hits it (a process called photopolymerization). So to create the desired item, a projector underneath the resin pool shoots UV light, in the form of a series of cross-sectional images of the object. Light, in a sense, is the blade that the printer uses to sculpt its products.
Meanwhile, oxygen prevents this reaction from occurring so to stop the object from simply hardening and sticking to the floor of the pool, there's a layer of dissolved oxygen there, creating an ultra-thin "dead zone" at the very bottom.
http://www.vox.com/2015/3/16/8227627/3d-printing-liquid-continuous
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New 3D printing method 25 to 100 times faster (Original Post)
Bosonic
Mar 2015
OP
MannyGoldstein
(34,589 posts)1. Very cool!
I suspect that resolution might suffer due to local heating - a whole slice at a time is a lot of energy.
MrMickeysMom
(20,453 posts)2. The first step towards Star Trek's replicator?
Thor_MN
(11,843 posts)3. photopolymerization for 3D printing isn't new
Maybe new materials, techniques involved, but the concept isn't new.