Sand from the shores of Lake Vättern works best in the foundries’ 3D printers, a research project shows. “Sand with feldspar in it becomes a little more flexible. The sand grains can expand when they get hot “, says Ulf Gotthardsson, researcher at the Rise Institute.
In the industry, there are 3D printers where sand is the raw material for making casting cores. These cores are then used as a kind of molds when casting, for example, engine blocks of iron.
The 3D printers are made in Germany, and the sand itself also usually comes from there. But Swedish sand works better, according to a study done at the state research institute Rise.
– The sand from Germany consists in principle of 100 percent quartz. The Swedish sand has perhaps 80 percent quartz and 20 percent feldspar, says Ulf Gotthardsson.
The sand used in the project comes from two sand roofs in Habo, on the southwestern shore of Lake Vättern. There is deposition from an ice river, and the sand that can be excavated is almost completely free of pebbles and other unwanted.
The sand has, among other things, been tested in 3D printing of casting cores in AB Volvo’s production of engine parts for heavy vehicles in Skövde.
The other “ingredient” in the manufacture of casting cores is a binder, which in the research project was based on phenol.
*The article has been translated based on the content of Nyteknik – Senaste nytt by www.nyteknik.se. If there is any problem regarding the content, copyright, please leave a report below the article. We will try to process as quickly as possible to protect the rights of the author. Thank you very much!
*We just want readers to access information more quickly and easily with other multilingual content, instead of information only available in a certain language.
*We always respect the copyright of the content of the author and always include the original link of the source article.If the author disagrees, just leave the report below the article, the article will be edited or deleted at the request of the author. Thanks very much! Best regards!