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call of duty black ops ii crackfix repack skidrow Micro-droplet jetting 3D printing typically uses low-viscosity material, but in a study entitled “energyxt2.5 keygen,” a group of researchers investigates using the technology for high-viscosity liquids. Micro-droplet jetting manufacture, or MDJM, is based on discrete deposition technology, which “sprays liquid through a 3D printing device, controls the trajectory of the droplet ejection via the motion platform, accurately sprays the droplet at a specified position, and gradually accumulates into a three-dimensional model.”

civ 3 conquests crack no cd The technology is used in biomedical manufacturing, three-dimensional microstructure manufacturing, microelectronics, micro-spacecraft and more. In the paper, the researchers develop a jet 3D printer consisting of a piezoelectric stack, drive frame, lever, heat insulation, heat sink, heater, needle and nozzle. A device for ejecting high-viscosity fluid is designed by analyzing the injection principle of the fluid.

fox digital copy keygen “Initially, the cooling mechanism is designed to overcome the defect that the piezoelectric stacks cannot operate in high-temperature conditions,” the researchers state. “Thereafter, the mathematical model of the liquid velocity in the nozzle is derived, and the factors influencing injection are verified by Fluent.”

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avatar crack sms nap tien atm The needle velocity of the 3D printer was tested by a laser micrometer, and the relationship between voltage difference and the needle velocity was also obtained.

rotary coat rack pottery barn “The experimental results matched the theoretical model well, showing that the voltage difference, needle radius, nozzle diameter, and taper angle are closely related to the injection performance of the 3D jet printer,” the researchers state. “By using a needle with a radius of 0.4 mm, a nozzle with a diameter of 50 μm, a taper angle of 90°, a supply pressure of 0.05 Mpa, and a voltage difference of 98 V, a molten liquid with a viscosity of 8000 cps can be ejected with a minimum average diameter of 275 μm, and the variation of the droplet diameter is within ±3.8%.”

game mjen phj crack Several experiments were run on the influencing factors of injection, such as the voltage difference, the needle radius, the nozzle diameter and the nozzle taper angle. The researchers came to the following conclusions:

  • The defect that the piezoelectric stacks cannot operate in high-temperature conditions can be solved by a specially designed cooling mechanism
  • The velocity of the needle is positively correlated with the voltage difference of the piezoelectric stacks
  • Through simulation analysis and experimental research, the ejection capacity of the jet printer is positively correlated with the velocity and the radius of the needle and negatively correlated with the diameter and taper angle of the nozzle
  • Through experimental comparison, by using a needle with a radius of 0.4 mm, a nozzle with a diameter of 50 μm, a taper angle of 90°, a supply pressure of 0.05 Mpa, and a voltage difference of 98 V, a molten liquid with a viscosity of 8000 cps can be sprayed with the minimum average droplet diameter of 275 μm, and the variation of the droplet diameter was within ±3.8%

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curt crackrach For this study, the researchers used a type of polyurethane. In future studies, the researchers conclude, the focus should be on the effect of other high-viscosity molten liquids that have not been used for jetting in 3D printing before. This could potentially open up new applications for the technology.

amazon the fashion rack coupon code Authors of the paper include Yang Yang, Shoudong Gu, Jianfang Liu, Hongyu Tian and Qingqing Lv.

can you fix a cracked iphone 4 screen Discuss this and other 3D printing topics at lego indiana jones 2 crack chomikuj or share your thoughts below. 

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