[Commentary] What can the sand on the desert Gobi be used for? In the innovation workshop of Lanzhou High-tech Zone in Gansu, this seemingly useless Gobi sand was transformed into sand material that can be used for 3D printing. Recently, the reporter saw in the exhibition hall of the Innovation Workshop of the High-tech Zone that the 3D products made of sand are lined up, mainly focusing on industrial molds and cultural and creative products.
An Jiangdong, deputy general manager of Gansu Bolijiang 3D Printing Technology Co., Ltd., told reporters that more than ten kinds of Gobi sand are screened and filtered here, and then mixed with a certain proportion of curing agent, and finally made into 3D printable sand raw materials. Whether it is separated fine sand or coarse sand, it can be used according to different 3D products.
[Same period] An Jiangdong, Deputy General Manager of Gansu Bolijiang 3D Printing Technology Co., Ltd.
Then we have developed the sand a second time. The sand in the desert, the original is different in thickness, and then we sift it out coarsely, and then the fine, so it can be used. It is to remove all its dust, we use the granular one.
Look at the surface of the sand, you can rub it down with your hands, then it may be that its bonding performance is worse, and then we slowly go through continuous experiments, and the resulting strength is very it is good.
[Explanation] An Jiangdong gave an example. If it takes one week to make traditional molds, sand and soil 3D printing takes only two hours, and the accuracy is higher and the cost is lower.
[Same period] An Jiangdong, Deputy General Manager of Gansu Bolijiang 3D Printing Technology Co., Ltd.
This mold is one of our Lanzhou water pump plant, a mold of their impeller, this processing like our mold may be completed within a few hours. If they do according to their traditional processing mode, it may take several weeks, and otherwise their cost is very high. After this processing, we have high precision, short time and low cost.
[Explanation] Ma Weigang, a materials research and development engineer, said that different sands require different ratios of curing agent and resin. Sometimes in order to achieve the best ratio of sand to resin and curing agent, it takes more than 200 attempts to succeed.
【Same period】Ma Weigang, material development engineer
The main difficulty is to master the ratio of each kind of it, each kind of sand and its mixture with resin, to make the best effect, its ingredients are different, so the required curing agent and The ratio of resin is different, so it is said that we need to (constantly) adjust and debug.
[Explanation] Ma Weigang introduced that compared with traditional product manufacturing, 3D printing can achieve no waste of materials. As long as the mold is built on the computer, the machine can be processed in one time without any slight material. waste.
Reporter Yin Chunyong Gao Ying Lanzhou Gansu reported
Editor in charge: [Liu Xian]