The latest printing technology makes 3D printing a

New printing technology makes 3D printing alive

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core tip: Recently, a "cool" online video caught fire: a white cheetah model just printed out in 3D was slowly immersed in the pool floating with color film. When it surfaced again, it actually "grew" colorful fur, eyes, ears and tail. Today, the number of online clicks on the video has exceeded 500000, and the "onlookers" of scientific and technological media have "praised" it, saying that it is a "Crazy" and "incredible" invention

[China Packaging News] recently, a cool online video caught fire: a white cheetah model just printed in 3D slowly dipped into the pool with color film floating. When it surfaced again, it actually grew colorful fur, eyes, ears and tail. Today, the video has been clicked more than 500000 times, and the onlookers' scientific and technological media have praised it, saying that this is a crazy and universal experimental machine, which is mainly used for stretching, tightening, bending, shearing, puncturing, yielding, elastic modulus and other incredible mechanical properties of materials, metallic materials, non-metallic materials and products

this fantastic invention comes from the State Key Laboratory of computer aided design and graphics of Zhejiang University. According to reports, the video shows a new type of printing, point-to-point aiming at three-dimensional objects for accurate coloring

the range should be set to the minimum level 1 when zeroing 3D objects in colored clothes.

Professor Zhou Kun of Zhejiang University, who presided over the study, said that 3D printing for personalized customization has always been difficult to achieve individuality in terms of pattern and color. Although some industrial 3D printers can support color printing, the equipment is expensive, the printing cost is high, the speed is slow, and it is limited to a few materials

in a cooperative project with Columbia University, the team chaired by Professor Zhou Kun innovated the traditional water transfer technology, proposed a new computational water transfer technology, and solved the problem of accurately coloring three-dimensional objects

water transfer printing is a surface coloring technology widely used in industry at present, but it can only be used for coloring tasks that do not require accuracy. Through computer graphics and computer vision technology, we can aim at water transfer printing and put on a color coat of arbitrary design for three-dimensional objects. Zhou Kun said

the core of this technology is to reduce the dimension of the three-dimensional design draft into a two-dimensional expansion map by computer. For this reason, the research group has physically modeled the deformation of the water transfer film during the water transfer process for the first time in the world, so as to obtain the mapping relationship between the three-dimensional design drawing and each point on the film. Based on this theory, the research group developed a set of automatic principle prototype for actual coloring

accurate calculation perfect film

Zhang Yizhong, a member of the research group and doctoral student, demonstrated the whole process of printing: after the Designer completes the 3D pattern design of a face on the computer, the software developed by the research group will quickly calculate and generate a two-dimensional expansion map. After that, the inkjet printer prints out a water transfer film printed with the expansion map. Put the film on the still water, and immerse the face model that needs to be colored in the water. A magical phenomenon occurred: the film gradually wrapped the face model, and the paint adhered perfectly

this is a perfect and accurate automatic film. Zhou Kun said that for more complex objects, the research group has also designed multiple coloring methods to ensure that every part of the surface of the object is colored and avoid color overlapping

Associate Professor He Yong of the school of machinery and engineering of Zhejiang University believes that in the beginning of 3D manufacturing, the problem of shape and color must be solved at the same time. With color and texture, its expressiveness will be enhanced. The great value of this invention is to solve the accurate correspondence of images

all kinds of materials take all

zebra. Some operators did not operate according to the application requirements of the electronic tensile machine. Tea cups, cars, globes in the laboratory, we saw many 3D models colored by the calculated water transfer technology. It is understood that this computational water transfer technology is applicable to a wide range of materials: metal, plastic, wood, ceramics, rubber, etc

although the starting point of this invention is to solve the problem of 3D printing being colorless, its application scope actually goes beyond the scope of 3D printing, and it can face any 3D object, even if it is not 3D printed

it is reported that the papers related to this research achievement have been accepted by the top conference of the international computer graphics community. Zhou Kun believes that with this correspondence from the virtual world to the physical world, there will be more room for imagination in the future technological development. Coloring may be just one of them