Researchers have developed 3D printing techniques, in which, instead of sequentially applying one layer of material, models of light are formed in two different ways on a liquid resin. This allows you to make more durable products and speed up their production by 100 times..
Three-dimensional printing allows you to automate the production process of various elements of complexity, but using the classical method of devices, they gradually apply layer by layer, it takes a lot of time to complete the work. However, researchers at the University of Michigan have invented a new, faster 3D printing technology..
Their method uses a liquid resin and two different wavelengths of light to control it. One triggers the hardening reaction and the other prevents it. Together they determine which areas will be tough and which will remain liquid. The manufacturing process is «stretching» products from a container with resin and resembles casting rather than printing.
The technology is based on the chemistry of the resin, which contains both a photoactivator and a photoinhibitor, which ensures the simultaneous flow of two opposing factors in the system. When added to the composition of powder additives, you can increase the rigidity and wear resistance of objects. Strength provided by structural integrity. «cast» products.
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To achieve success, scientists had to overcome the problem of solidification of the substance in the window, light passed through, which led to an instant stop of the process from the very start. Initially, oxygen was used for this. Using a second light with a much larger gap between the window and work area..
The proposed technique makes it possible to manipulate the resin at any point in the three-dimensional space near the radiation. With the help of the prototype, the researchers attacked the letter M, a grate, and a miniature boat. Michigan State University has already filed three patent applications for its invention and is preparing to launch a startup.
Acceleration of the manufacturing process of devices for the implementation of 3D printing in manufacturing, light industry, medicine, mechanical engineering. and other areas.
text: Ilya Bauer, photos and videos: YouTube / University of Michigan