3D printing and 3D printer now, everyone’s idea of tradition is ABS,PLA, or metal powder, more advanced is the tissue cells as print materials, printers and Cheap 3D Pens also corresponds to these material. Who would have thought but concrete can also be done for print materials. In many people’s ideas when it comes to concrete 3D printers, are the giants who can print the house. And generally agreed that concrete liquidity and slow solidifying difficulty to make the small size and produce more sophisticated objects. The old saying goes, findings are used to overthrow, now two students from San Francisco has proved. Using concrete to make the smaller size of the 3D object is possible.
The two students to is Clayton Muhleman and Alan Cation, they entered the field of 3D printing since the fall of 2014. In January of this year they were involved in an interesting research project, the project consisted of building innovation machine Studio (Creative Architecture Machines Studio) lead, and eventually they developed a 3D robot action fun Swarmscapers, the robot can use granular materials, such as sawdust, create basic shapes such as salt and rice.
These experiences inspired their thoughts clearly, Clayton and Alan became convinced that 3D printing will have bright in the construction industry. “Despite the sawdust in testing our technology really is a great material, but we want to print more concrete. But in order to use concrete for our mobile 3D printer, we must first know if the 3D printer materials as a powder bed of concrete, it may show some of the features. “They explained. So, according to their new-found knowledge, the two brothers created a very interesting concrete 3D printer. The dimensions of this machine to less concrete than we used 3D printer, its maximum building size 2x3x1 inches (approximately 60x90x30 cm). It is good to smaller objects in the field of building construction, and even some of the art works.
More importantly, they also wrote a very detailed step by step tutorial to help us build this very interesting machine. When you build this machine, Clayton and Alan were not starting from scratch, they use a Shapeoko CNC machine tools as a basis, 4×6-foot aluminum Rails expanded its gantry, a Arduino Uno Board were used as a control system, also has a pump for deposition adhesives. Them through these very simple way to create a large 3D printer. “Shapeoko manual to guide you how to wiring to control motor, it requires a UNO and stepper motor drive expansion board. Because hoses and motor-driven pump requires its own UNO plate expansion board. We designed a 3D printing of the motor base. “They said. Due to the concrete particles of powder, the two plywood is also used to create a print bed. As regards hose pump control, the students using Rhino, Grasshopper, Firefly software.
Of course, ultimately, sand and cement in concrete. “In order to print full size for 2x3x1 the 3D object, we used 1,000 pounds of sand and 500 pounds of cement. “The students said,” we used 2:1 30 grit sand and white cement to form concrete. If coarse sand of the ratio should be 3:1. “In addition, the adhesive they use brand is poly Lu (olypavement), and in this printing technology, considerable amount of adhesive. The adhesive through a process of evaporation condensation, this means that the concrete will be gradually condensed and as time goes on more and more. Then you just dug out from a cement and sand molding model.
Seems to print the adhesive is the key to success of sediments, but concrete is the material nature of the smaller sizes, it prints the result will not be too accurate, but also a cool result. The video below shows the printout was buried in a pile of cement and sand, when it is cured after 12 hours you can dig it out. If you are interested, may wish to follow their tutorials to do try and Heavenly feel, this is a very innovative approach to 3D printing, is a bit like ink-jet technology, improved, certainly in the construction industry has considerable prospects.