In the last post we went over how the Desktop Metal 3D printing process can print larger parts than can be made with the metal injection molding (MIM) method. This is due to the ability of it to print parts with a hollow infill and how the debinding process works.
Before the parts can move onto to the furnace to be sintered, they need to have to binding agents removed from them. This is done in a liquid chemical bath that soaks into the entire part and dissolved out the binding agents. The Desktop Metal debinder is a self-contained unit with a touch screen interface that is communicated with the Fabricate software to know process time and job size. The debinder station is airtight and will distill down the used fluid after the job is done to reuse it for the next job. This allows it to generate very little waste and be much more economical and office friendly to operate.
The Fabricate software shows the estimate for print time, debind time, and sinter time.
The Parts can be printed with different settings of how thick the walls will be before the part transitions to the hollow infill. How thick you set the walls to will directly affect how long it takes to debind. The software will give you an accurate estimate of how long it will take to print, debind, and sinter (though the sinter time will change between 38-48 hours).
While the printer makes parts 1 at a time, like FDM, the debinder and furnace can both be bath processed. Also there is no issue with over debinding of parts. So you can fill up the debinder with part that have a run time ranging from 12 hours to 120 hours and they can all be run in 1 cycle that lasts 120 hours without issues. After that they can all be batch processed in the furnace at the same time too, as long as they are the same type of metal.
Sr. Applications Engineer – 3D Printing/3D Scanning/Solidworks
Computer Aided Technology, Inc.