Printing Without Heat
Binder jetting takes a fundamentally different approach from laser-based additive manufacturing: instead of melting powder, it selectively deposits a liquid binder that glues particles together at room temperature. This eliminates thermal stresses, support structures, and the need for inert atmosphere — and it is fast. Industrial binder jetting machines print at rates 10-100× faster than SLM, making them viable for production volumes of thousands of parts per day.
Saturation Science
The critical process parameter is binder saturation — the fraction of interparticle void space filled with binder. Too little binder and the green part crumbles; too much and excess binder wicks beyond boundaries, bloating features. The optimal saturation window (typically 60-80%) depends on powder morphology, packing density, and binder viscosity. This simulator lets you explore how saturation interacts with other parameters to control green part quality.
From Green to Dense
The printed 'green part' is only 55-65% dense — a fragile matrix of powder held by binder. Curing crosslinks the binder for handling strength, then sintering at 1200-1400°C (for metals) burns off the binder and densifies the powder through solid-state diffusion. Parts shrink 15-20% linearly during sintering, requiring precise compensation in the digital model. The simulator estimates sintered density based on green-state parameters.
Speed Versus Resolution
Binder jetting's speed comes from its parallel deposition: industrial printheads contain thousands of nozzles jetting simultaneously across the powder bed. Layer times of 5-20 seconds enable build rates exceeding 1000 cm³/hour. The trade-off is resolution — current droplet sizes (50-80 μm) limit minimum feature size to approximately 200 μm, coarser than SLA or SLM but sufficient for most structural and tooling applications.