Original title: non foggy 3D printing goggles are coming
Meng Jiaoyan, reporter of Hunan Daily
Correspondent Gong Tiejing and Meng Chao
The UV laser draws a curve along the data model. The photosensitive liquid resin gradually changes from liquid to solid, dots into lines, lines gather into surfaces, and processes layer by layer. Through the stereoscopic light curing printing technology, a pair of medical goggle frames are printed out in about 1 hour.
On February 25, Hunan Yunjian Group Co., Ltd. sent good news. On the basis of the original equipment, they urgently pulled through a special production line for 3D printing medical goggles, with a daily output of 2000 pairs. At the same time, the product effectively solved the problem of fogging in the use process.
Improved technology of suction cup lens, no fog and better fit of goggles
On February 26, the reporter saw in Hunan Yunjian additive manufacturing technology research and application center that more than 200 3D printing devices of three types were "fully open" and medical goggles were being printed.
The frame printed by stereolithography 3D printer is hollow structure, with a weight of only 70g.
"In addition to being light, sealing suction cup is the key to safety and comfort of goggles." Yang Kai, general manager of Hunan Yunjian additive manufacturing technology research and Application Center, said that the traditional process goggles are injection molded, which may slightly deform during wearing, unable to completely seal, and easy to fog. Hunan Yunjian repeatedly communicated with the medical staff for debugging, and finally chose the TPU silica gel with excellent airtightness as the suction cup. This material is soft and elastic. Even if it is worn for a long time, it can also achieve the fit with the face, maintain the sealing state, and at the same time, it has the advantage of anti-corrosion in disinfection.
The goggles have the same sense of technology. Yang Kai introduced that Hunan Yunjian cooperated with Hunan University in research and development. The high-definition lens adopts a special coating technology, which effectively solves the problem of fogging during the use of goggles.
153 hours to realize production conversion, with a daily output of 2000
Medical goggles are one of the necessary weapons of war. Traditional production is small and difficult to expand. As a national key military research and production enterprise directly under China Armament Corporation, Hunan Yunjian has mature 3D printing technology reserve.
On January 31, the company set up a project team to transfer medical goggles for military 3D printing technology, and completed the sample within one day. On February 7, the production of products was approved by the market supervision department. Within 153 hours, Hunan Yunjian completed the design and finalization of the product, and transferred to the production of 3D printing goggles.
The reporter learned that 4250 sets of 3D printing medical goggles have been donated and transferred by the government to Wuhan, Changsha and other war epidemic front lines. On February 25, 200 sets of 3D printing related equipment purchased by the company in an emergency have been put into production, and a special production line for 3D printing medical goggles has been opened, with the daily output increased to 2000 pairs.
"3D printing has the advantage of rapid emergency production. In special periods, it can realize unmanned manufacturing and share data models. If the industry's 3000 network printing resources are jointly mobilized, the daily output can exceed 10000 copies." At present, there are nearly 100000 orders from Hubei Province, and more than 95% of the products produced in the early stage are donated to the medical staff at the front line of the war epidemic, Yang said.