Additive Manufacturing

Metal 3D Printing

In addition to stamping and forming, the Greene Group’s capabilities also include CNC machining, Wire EDM, and Metal Injection Molding (MIM). With the March 2024 acquisition of Holo technology, the Greene Group now also offers PureForm™ metal additive manufacturing.

PureForm™ Technology

PureForm™ starts with a proprietary slurry of MIM powder and photoresistive polymer binder. Parts are built layer-by-layer with proprietary high-resolution, high-throughput optical printers. The resulting “green state” parts are then baked in a sintering oven to remove all traces of binder, resulting in highly pure final parts with qualities approaching bulk material.

The backend process is virtually identical to MIM. PureForm™ creates three significant advantages:

  1. Parts are rapidly printed at low cost with no molds or time delays.
  2. Printed parts have surface finish and feature resolution that meets or exceeds MIM.
  3. PureForm parts scale rapidly and cost effectively to volumes up to 10s of thousands per month. For higher quantities, the transition to MIM is straightforward given the similarities of processes.

Prototyping and Low-Volume Production

PureForm™ technology delivers fine-featured metal parts to quickly prototype, offer bridge production, serve low-volume demand, and offer replacement parts.

The proprietary polymers used in the PureForm™ process are engineered to vaporize during part sintering. The result is highly pure parts with properties approaching bulk material. PureForm™ material purity exceeds that of other additive manufacturing (3D printing) approaches.

With features down to 50 microns with 100 micron walls, the PureForm™ platform prints parts previously only possible with Swiss CNC machining.

Production-Ready Printing

Applications to date have included:

  • Surgical tool R&D and product development
  • Wearable consumer electronics
  • AR/VR components & equipment
  • High-performance thermal management components
  • Aerospace & defense (especially for light-weighted parts and electric aviation)
  • Automotive (focus on EV developments)
  • Precision robotics
  • MIM prototyping and bridge production

Production metals include:

  • 17-4PH stainless steel
  • 316 stainless steel