PostProcess Technologies DEMI 4000 Series: Go Big or Go Home

Article by Simon Pinter on Aug 14, 2023

The Stratasys NEO is a large-format Stereolithography (SL) 3D printer capable of printing full-scale, injection-molded-quality, functional parts. Removing residual resin from SL parts is a fundamental step in the process. PostProcess Technologies offers a solution that perfectly complements the scale and volume of what the Stratasys NEO can build: the DEMI 4000 Series

DEMI 4000 Stereolithography Resin Removal System GoEngineer Pleasant Ridge

3D Printing with the Stratasys NEO 

When a print completes in the Stratasys NEO, it rises out of the vat of liquid photopolymer from which it was built. Nearly all unused, uncured resin drips back down into the vat for use in a future build. There will always be some residual resin clinging to the part that must be removed before it can be handled and used. 

One option for removing this residual resin is to manually dip the part into tanks of isopropyl alcohol (IPA), which works great for cutting through the resin and cleaning up the part... in theory. 

In practice, however, it is expensive, operator time intensive, problematic for many companies' environmental-health-and-safety groups, and must regularly be replaced. 

Benefits of Using the DEMI 4000 Series

Here are just a few reasons why we recommend the PostProcess Technologies DEMI 4000 Series automated SL resin removal system and its proprietary detergent.

It's cost-effective. The PostProcess detergent’s capacity for dissolved resin is considerably higher than isopropyl alcohol. As a result, considerably less is needed over time with an equivalent amount of use. Needing to budget for less detergent means having more capacity for making those big NEO prints.

It's safer. Many SL resins require a heated bath to fully remove residual resin. Understandably, hot alcohol tends to make EHS departments and municipalities nervous. Thankfully, the PostProcess detergent has an exceptionally high flashpoint of over 200°F / 93°C (as compared to just 53°F / 11°C for IPA).

It's easier. The DEMI 4000 has an elevator that automatically submerges large SL builds. 

Removing SL Resin PostProcess DEMI 4000

It uses PostProcess’ patented Submersed Vortex Cavitation (SVC) technology, to ensure a consistent and optimal rate of resin removal while being nearly entirely hands-off from the operator. 

PostProcess Technologies Submersed Vortex Cavitation

Simply place the part tray on the elevator, shut the door, and hit start. Once the part is removed, a quick rinse at the sink and air dry is all it takes to complete the process.

SL Resin Removal PostProcess DEMI 4000 Series

With a comprehensive end-to-end stereolithography workflow, industries can unleash their full potential of printing BIG and meet the needs of their most demanding additive applications. 

To learn more about the DEMI 4000 Series or any other PostProcess Technologies system, please contact us.

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About Simon Pinter

Simon Pinter is a Manufacturing Solutions Application Engineer at GoEngineer

View all posts by Simon Pinter