The manufacturing principle of a 3D printer is similar to that of stereolithography, in that a laser is used to create a pattern in a liquid material that can be converted into a solid by light, and each layer of the article is produced. Usually after a layer has been created, the laser has to be switched off to allow more liquid material to spread out sufficiently to prepare for the next level. This process is not only very slow, but the "interactions" between the layers will leave marks on the manufactured items.
How to make the manufacturing process continuous, and to ensure that no traces remain between the different layers, the key is to modify the liquid material so that it does not cure immediately when exposed to light. The researchers used a thin layer of oxygen that allowed it to temporarily stop the liquid material from solidifying and to maintain continuity at the material level. The researchers said that this technology makes the manufacturing speed of 3D printers comparable to that of conventional manufacturing in many cases.
In the process of developing this technology, researchers used different types of commercially available plastics. At present, they are still trying to use other types of liquid materials in order to use mixed materials to create different items.
At present, researchers have published the technical principles of the 3D printer in the recently published "Science" magazine. The innovative company Carbon3D, which was established to apply and promote this technology, has received a financing of 41 million U.S. dollars.
Portable Diesel Electrical Screw Air Compressor
Portable Diesel Screw Air Compressor
A compressor can be used to power a variety of jobs such as inflating tyres or operating a nail gun at home or in a workshop. Portable air compressors are good for light, quick jobs as they tend to have a smaller tank with a handle and wheels to make them easy to movement. The size of the tank will determine how much air is stored and therefore how long it will run so if you are using tools that require a high volume of air for longer, then you should consider a larger tank.
The energy contained in the compressed air can be used for a variety of applications, utilizing the kinetic energy of the air as it is released and the tank depressurizes. When tank pressure reaches its lower limit, the air compressor turns on again and re-pressurizes the tank. An air compressor must be differentiated from a pump because it works for any gas/air, while pumps work on a liquid.
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