At A Glance
Estimated Read Time: 4 min.
January’s Part of the Month comes from Project Engineer Doug Simsarian, who took an unconventional route by highlighting a cured resin tube made from unused liquid resin. Created using the Onulis WRAP Pro, the resin is dripped onto a rotating tube and UV-cured into a solid, reusable form. It’s a simple but meaningful example of how sustainability and responsible practices matter behind the scenes of additive manufacturing.
January’s Part of the Month comes to us from Project Engineer Doug Simsarian, who took an unconventional route with his pick. Instead of choosing a glossy, eye-catching print, Doug highlighted something most people overlook entirely: a cured resin tube made from unused liquid resin.
At first glance, it might not look like much. But once you take a closer look, it tells an important story about sustainability, responsibility, and the less glamorous side of additive manufacturing.
What & Why?
The pink tube, solid with textures and bumps, was made entirely from expired PolyJet resin. That’s right, expired resin. In its liquid form, this unused or expired resin is considered hazardous waste, but as a solid object, it’s the same as any other 3D printed part.
“They took a liquid, dripped it onto a rotating tube,” Doug says, “and cured it with UV lights to make it solid.”
The resulting tube can be machined, reused, or safely disposed. This printing is made simple with the Onulis WRAP Pro system. In Doug’s words, “You can turn unused resin into something.”
Doug chose this part specifically because it doesn’t scream for attention.
“Everyone always picks the pretty parts that really stand out. Never the stuff that took no effort… hence why it sells.” This tube represents the behind-the-scenes work that keeps shops safer, cleaner, and more sustainable.
The Environmental Impact
Unused and expired resin is a bigger problem than many realize.
Many facilities store barrels of unused resin that are expensive to dispose of through hazardous waste services. Barrels take up valuable floor space, and improper disposal is harmful to the environment (not to mention, it’s illegal). Instead of storing or outsourcing disposal, resin can be cured into a manageable solid form that’s far easier to deal with responsibly.
Why WRAP Pro?
The WRAP Pro can cure unused and expired PolyJet, SLA, and DLP resin by transforming the liquid waste into solid components.
The result is a more sustainable, start-and-walk-away process that saves time, reduces disposal costs, improves safety by eliminating manual curing, and frees teams to focus on higher-value work.
How It Works
- Resin is poured into the vat, and the mandrel carriage is raised.
- Press start, and the system runs automatically.
- Once curing is complete, the WRAP Pro stops on its own. The solid resin can be CNC machined into prototype parts or disposed of as standard household waste.
Not All Important Parts Are Pretty
Doug’s pick is a reminder that innovation doesn’t always come in the form of shiny, finished parts. Sometimes it shows up as a resin tube that quietly solves a real problem.
If you’re interested in bringing these capabilities in house, reach out to our team here!
Meet Doug Simsarian
Meet Purple Porcupine Project Engineer, Doug Simsarian. Doug focuses on helping customers find the right additive solution for their prototyping and production needs. His favorite part about working at Purple is the diverse projects and exciting applications.
Out of the office, Doug enjoys playing tennis, biking, and working on cars. If you haven’t had the chance to meet Doug yet, connect with him on LinkedIn or stop by our office and say hi!
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