Fine metal powders are combined with thermoplastic and wax binders to form a feedstock. When heated, the feedstock becomes a viscous slurry which is then injected under high pressure into an engineered mold to form the desired shape component. Upon cooling, the part is ejected from the mold and then subjected to a process (called debinding) to remove binder constituents. The final step (sintering) subjects the part to high temperature in a controlled atmosphere to fuse the metal powders together into a near fully dense solid.
How does the MIM process work?