Fast, Ultra-Precise Metal 3D Printing Using PureForm™

PureForm from Greene Group Industries is a proprietary metal 3D printing technology that can produce rapid-prototyping, production, and replacement parts without compromising quality.

Leverage the PureForm Advantage

Fast metal printing is a low-cost option with no molds or time delays. PureForm 3D printing delivers prototype metal parts with surface finishes and feature resolution comparable to those of metal injection molding.

Utilizing PureForm metal additive manufacturing enables you to:

Save time and reduce time-to-market by bypassing the lengthy process of mold construction

Achieve surface finish and feature resolution beyond other additive manufacturing technologies

Scale quickly and economically for low-volume production runs

Easily transition to metal injection molding (MIM)

PureForm metal 3D printing utilizes a unique mixture of MIM powder and a photoresistive polymer binder to deliver complex, precision metal parts when you need them.

A Streamlined Path from Prototype to Production

Additive metal 3D printing with PureForm is a competitive advantage that helps you rapidly prototype and refine, enabling you to solve technical challenges and bring new products to market faster.

Complex metal components, on demand

In the PureForm metal 3D printing process, components are constructed layer by layer using specialized high-resolution, high-throughput optical printers. The subsequent “green state” components are then processed through debinding and sintering, yielding parts that comply with MPIF-35 standards. The backend process is virtually identical to MIM.

  • Production metals include 17-4PH stainless steel and 316 stainless steel
  • Produce components with features as fine as 50 microns with 100-micron walls
  • Options for post-sinter secondary processes (plastic over molding, machining, grinding, brazing, welding, crimping, assembly, etc.)
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Medical MIM Manufacturer in North America

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Supporting Innovation Across Critical Markets

Our integrated, U.S.-based facilities give OEMs a single source partner for complex manufacturing across regulated and performance-driven industries.

  • Medical Device
  • Defense & Aerospace
  • Commercial & Industrial
  • Electronics & Communications

PureForm™ Metal 3D Printing Design Guidelines

Greene Group Industries’ PureForm additive manufacturing platform uses Digital Light Processing to produce intricate metal parts at production scale. The H200 industrial printer grows a batch of parts layer-by-layer by curing a slurry that mixes metal particles with a highly reactive photopolymer.

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Partnership Designed to Grow with You

Our connected teams make scaling simple. We help OEMs move seamlessly from concept validation to full-scale production.

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Design for Manufacture
We work alongside your engineers to refine part designs, eliminate risk, and prepare for production.
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Quick-turn Prototyping
Prototypes are produced quickly and accurately, allowing you to test real parts and move forward with confidence.
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Feedstock & Alloy Development
Our in-house team develops specialized metal and ceramic materials that meet your exact performance and regulatory requirements.
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Process Validation
Every manufacturing process is verified and documented to ensure repeatable quality and compliance at full production scale.
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Project Management
Dedicated project managers maintain open communication and proactive oversight to keep progress on track.
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Program Management
Large-scale programs receive continuous coordination between engineering and production, so every detail aligns with your timeline and goals.
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What Our Customers Say

“GGI has been a 5-star partner for us. After working with GGI through several projects over 6 years, I have found them to be incredibly responsive, and they have provided us with unparalleled quality on some of the most challenging MIM components. GGI has consistently developed novel ways to design their tooling to meet our demanding specifications on the latest surgical technology.”

Sr. Manufacturing Engineer,

Large Medical Device OEM

“GGI has remained a top-tier supplier long term. The highest levels of responsiveness and professionalism set them apart in support of rapidly changing requirements and extremely dynamic end customer requirements. Much of our success ties directly into these very high levels of support. Continuing thanks to GGI for all the support over all these years.”

Purchasing Manager,

Leading Equipment and Systems Manufacturer

“I wanted also to share that if I am ever asked to rank all of the vendors I have worked with according to responsiveness, achieving goals, communication, skill, and overall medical product knowledge, GGI wins, hands down. It is a pleasure seeing the project turn into a trusted process. Thanks to you both and your team!!!!”

Design Assurance Engineer,

Large Medical Device OEM

“Over the past several years GGI has worked with my project team to develop components for multiple innovative new devices. The complex nature of our designs makes these projects challenging and require a lot of personal attention, crisp communication, and creative problem-solving to meet our project targets of timing, cost, and superior quality. GGI has demonstrated their willingness and ability to deliver in these areas, making them a valued partner for our business.”

Director of Advanced Instruments

Large Medical Device OEM

“GGI’s project management support is the best of any MIM house we have worked with. We are confident when placing a new tooling PO with GGI that we are going to close the project on time. When we get into production, GGI partners with us to continually improve the process and cost over time. We ask GGI to help us compete and they are always there looking for new ways help us to advance.”

Sr. Buyer

Large Medical Device OEM

“GGI rapidly develops complex machined components and assemblies with the highest possible quality. They take on our most challenging parts right from the prototyping stages, support all development efforts and carry them through to production seamlessly. They support our development efforts as if they are part of the internal team and their level of communication is superb.

GGI has been essential to product success and bringing the highest possible quality devices to the customer. They take on real challenges and work to solve them, not only with highly precise machined parts but with a range of processes and capabilities.”

Sr. Design Engineer,

Large Medical Device OEM

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Metal 3D Printing FAQs

What is PureForm™ metal 3D printing?

PureForm is Greene Group’s metal 3D printing process for producing complex, precision components without a mold. It uses Digital Light Processing to build parts layer by layer from a mixture of metal powder and a light-reactive binder. The printed parts are then debound and sintered to form finished metal components.

When should I use metal 3D printing instead of metal injection molding?

Metal 3D printing is a strong option when you need to test a design, refine a component, or produce a lower volume of parts without investing in a mold. Metal injection molding (MIM) may be a better fit as production volumes increase. Greene Group’s PureForm process uses MIM powders and a similar debinding and sintering process, creating a path from printed prototypes to molded production parts.

Can metal 3D printing be used for production parts or only prototypes?

Both. PureForm can produce functional prototypes for design evaluation and support low-volume production without mold tooling. Greene Group can also help OEMs evaluate whether a part should transition to MIM as demand grows. Contact our sales team to learn more.

What metals can Greene Group 3D print?

Greene Group lists 17-4PH stainless steel and 316 stainless steel as production materials for PureForm metal 3D printing. The right material depends on the component’s performance requirements and intended application. Greene Group’s team can review material needs during the design and development process.

How small can PureForm 3D-printed features be?

Greene Group states that PureForm can produce features as fine as 50 microns and walls as thin as 100 microns. Whether those dimensions are suitable for a specific part depends on its overall design and performance requirements, so critical features should be reviewed with the engineering team.

Does PureForm metal 3D printing require tooling?

PureForm does not require a production mold to print a part. This allows teams to make and evaluate design changes before committing to mold construction. It can be particularly valuable during prototyping and for lower-volume programs.

Can 3D-printed metal parts receive secondary operations?

Yes. Greene Group lists machining, grinding, brazing, welding, crimping, plastic overmolding, and assembly among its post-sinter options. These processes can be used when a part needs additional features, finishing, or integration into a larger assembly.

What types of projects are suited to precision metal 3D printing?

Precision metal 3D printing is useful for complex components that need fine features, design flexibility, or a faster path to a functional prototype. Greene Group supports OEMs in medical devices, defense and aerospace, commercial and industrial applications, and electronics and communications. Its team can assess whether PureForm, MIM, or another manufacturing process best fits a particular design.

What information should I provide to get a metal 3D printing quote?

Start with a part drawing or 3D model, along with the intended material, estimated quantities, critical dimensions, and performance requirements. It also helps to note whether the project is a prototype, a low-volume production run, or a design that may later move to MIM. Greene Group can use those details to assess manufacturability and recommend next steps. Contact us for questions or next steps.