Depowdering is where powder-bed shops lose hours they never quoted. In an r/AdditiveManufacturing thread called “Opinions on SLS,” operators kept coming back to the same point: printing is the easy part, and post-processing is the hard part. So when does automated depowdering pay off?
How much labor does manual depowdering take?
One operator described the full workflow. Parts cool, usually overnight. Sifting a full build chamber takes about 1 to 2 hours. Then comes media blasting, plus hand tools to clear small holes. They said a full build is easily a 2 to 3 hour manual job, before cleaning. Another said that doing it by hand was “not fun… at all.”
What does automated depowdering change?
The same thread reported going from a finished print to clean parts in 45 to 90 minutes after adding Formlabs’ Fuse Blast, with 20 to 30 minute blast cycles. Formlabs claims an average 80% cut in hands-on labor time. Hawk Ridge Systems, an AMT reseller, says AMT’s systems have saved 30 minutes to an hour of labor per job in its experience. These are vendor and user figures, not guarantees.
What are the options?
- Small batch: tumbling blasters such as Fuse Blast or AMT PostPro DP.
- Higher volume: machines with queued baskets and programmable recipes, such as the AMT PostPro DP/SB PRO.
- Continuous production: belt lines such as the AM Solutions S2, sold for hands-free 24/7 operation across SLS, MJF and HSS.
How do you decide?
Start with your own data. Time depowdering per build for a few weeks, multiply by your labor rate and build count, and compare that to the machine’s cost, using current quotes from equipment vendors. One operator’s advice was blunt: an automated sandblaster is the first thing they’d invest in.
How does it affect quoting?
If depowdering time isn’t in your quote, every complex part with internal channels erodes your margin. Track depowdering as its own timed step in your MES so you have real per-build times to price from.
Related on the Solvi blog: SLS Powder Cleanup: How to Keep Dust Under Control; SLS Material Changeover: Is Switching Powders Worth It?; SLS TPU: How to Print and Depowder Flexible Parts.
Sources: r/AdditiveManufacturing “Opinions on SLS” thread; Formlabs Fuse Blast announcement; Hawk Ridge Systems AMT page; TriMech AMT PostPro DP/SB PRO page; Additive Plus AM Solutions S2 page.