I collect gold fingers in the heavens

Chapter 713 The technology behind the future props 2
3D printing technology is widely used in modern society, in jewelry, footwear, industrial design, architecture, engineering and construction, automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, guns and There are applications in other fields.

On January 2019, 1, the University of California, San Diego used rapid 14D printing technology for the first time to create a spinal cord scaffold that mimics the structure of the central nervous system, successfully helping rats recover their motor function.

3D printing technology has several advantages and can save materials.There is no need to remove leftover materials, which improves the utilization rate of materials and reduces costs by abandoning the production line; it can achieve high precision and high complexity, and can manufacture very complex parts that cannot be manufactured by traditional methods; It can directly generate physical products from [-]D CAD graphics of any shape on the computer without traditional tools, fixtures, machine tools or any molds; it can automatically, quickly, directly and relatively accurately convert the [-]D design in the computer into a physical model, Even directly manufacture parts or molds, thereby effectively shortening the product development cycle; without the need for centralized and fixed manufacturing workshops, it has the characteristics of distributed production; it can be formed within hours, which allows designers and developers to realize from the plan The leap to the physical; the ability to print assembled products, thus reducing assembly costs and even challenging mass production methods.

But there are limitations.

For example, there are weaknesses of high cost and long working hours: 3D printing is still a relatively expensive technology.Due to the difficulty in research and development of materials for additive manufacturing and the small amount of use, the manufacturing cost of 3D printing is relatively high, but the manufacturing efficiency is not high.

Secondly, 3D printing does not yet have advantages in large-scale production: since 3D printing technology has the advantages of distributed production, on the contrary, it does not have advantages in large-scale production.

At present, 3D printing technology does not yet have the conditions to replace traditional manufacturing. In terms of large-scale and large-scale manufacturing, the traditional subtractive manufacturing method with high efficiency and low cost is even better.

It is unlikely that 3D printing will be used as a production method to replace mass production.

For some complex mixed material products, 3D printing technology cannot be directly printed and produced. Even if this problem is overcome, 3D printing takes too long. It takes at least several months or even longer to completely print a car. , Such a cost is unacceptable to car companies. In terms of cost, it is much higher than the cost shared on each car when mass-producing cars.

Only with "individualized and customized" products, the 3D printing production method will appear more economical.

In addition, the materials of 3D printing technology are also limited. At present, the printing materials are mainly plastic, resin, gypsum, ceramics, sand and metal, etc., and the materials that can be used for 3D printing are very limited.

In terms of precision and quality, it is also a problem that 3D printing technology cannot avoid.

Due to the inherent molding principle and development of 3D printing technology is not perfect, the accuracy of the printed parts (including dimensional accuracy, shape accuracy and surface roughness), physical properties (such as strength, stiffness, fatigue resistance, etc.) and chemical properties, etc. Most of them cannot meet the actual use requirements of the project, and cannot be used as functional parts, but can only be used as prototypes, so their application will be greatly reduced.

Moreover, since 3D printing adopts the additive manufacturing process of "layer-by-layer manufacturing and layer-by-layer superposition", no matter how tight the combination between layers is, it cannot be compared with parts cast from traditional molds as a whole. Organization and structure determine the performance of parts.

This is the limitation of 3D printing technology in the modern society where Wu Siyuan lives.

With the future 3D printing technology on the [Automatic Universal Construction Machine] produced by Doraemon, the printed products not only have precision and quality far exceeding the 3D printing technology in modern society, they are more than enough as functional parts, and, The speed is also far faster than modern 3D printing technology.

Modern 3D printing technology takes 20-30 hours, and what is printed is only a very simple house.

Such a house can be printed by the future 3D printing technology on the [Automatic Universal Construction Machine], and it only takes two or three hours to complete it, and it can even be done better.

The 3D printing technology on Doraemon props is about ten times more efficient than modern 3D printing technology.

Such efficiency, precision, and quality can actually replace many assembly lines produced in modern society.

Moreover, the 3D printing technology on Doraemon props can print mixed material products, and complex products like cars can also be printed directly, including parts such as engines and air conditioners.

But this is the use of nanotechnology and nanomaterials.

Even Wu Siyuan has not mastered real nanotechnology, let alone modern society.

Wu Siyuan discovered that many of Doraemon's technologies use nanotechnology.

It can be seen that in the future world of the Doraemon universe, nanotechnology has been used on a large scale in society, as common as hydropower.

[Four-Armed King Kong] told Wu Siyuan that with the scientific and technological capabilities of modern society, replicating this technology cannot reach the original level. Many key links cannot meet the standards, so they can only settle for the next best thing.

But even so, it is much more advanced than modern 3D printing technology.

Wu Siyuan has a premonition that this future 3D printing technology will be useful in modern society.

He put it down for now and asked about the solar cells.

Wu Siyuan once obtained advanced solar power generation technology in the world of "The Martian", and its power generation efficiency can reach 32%, which is twice the efficiency of photovoltaic power generation in the real world. In addition, under the sun exposure, the average annual efficiency decay rate is 0.3%!It is estimated that the effective use efficiency time is more than 50 years!
But the solar cells in Doraemon's hands have a higher power generation efficiency than the solar power technology in "The Martian", reaching 49.2%!
The reason for such a high conversion efficiency is that it uses a new type of nanostructure material.

This nanostructured material is more advanced than the composite perovskite material used in the world of The Martian, with higher performance and higher efficiency.

New nanostructured materials could provide better antireflection coatings, allowing more sunlight to enter solar cells.

Electrodes made from grids of nanowires can be almost completely transparent.

Nanopillars made of insulating materials rather than semiconductors could boost solar cell performance in a number of ways.

The nanopillars do not absorb light and have a different refractive index than the surrounding material, so certain wavelengths of light reflect off the array.These nanopillars can form an independent layer between the perovskite and silicon.

(End of this chapter)