STEP 1
The first step in the Binder Jetting process is printing. A fine metallic powder is selectively bonded layer by layer using a binding agent. This creates a detailed green part, which, while precise, is delicate and not yet functional due to its low mechanical strength.
STEP 2
Curing strengthens the green parts, making them safe to handle and remove from the printing bed. During this step, the parts are heated in an oven at approximately 200°C for several hours. This controlled process hardens the binder, resulting in much more robust parts ready for further processing.
STEP 3
Depowdering is the step where loose, unbound powder is removed from the cured parts. Using air jets or other tools, any residual powder is carefully blown away, leaving behind the raw, unpolished metal structure. At this stage, the part is still rough and requires additional refinement.
STEP 4
Sintering addresses the porosity of cured metal parts. In a controlled furnace atmosphere, parts are heated to approximately 1,000°C for 24-36 hours. This process burns away the binding agent and fuses the metal particles, resulting in a denser and stronger part. However, designers must anticipate potential shrinkage during sintering, as it can affect dimensional accuracy.
STEP 5
As a final, optional step, parts can undergo finishing treatments to achieve desired aesthetics. This may include polishing for a smooth surface or plating with materials like gold or nickel to enhance the appearance, creating a refined and visually striking final product.