RE: [rp-ml] removing loose powder on sls parts

From: David K. Leigh <>
Date: Thu Oct 21 2004 - 17:07:20 EEST

There are several ways to do it. . . but lets assume its kinda like a
hearing aid shell. There are little wire frame baskets that you can put
small parts into. When you bead blast the parts in the basket, it creates a
vortex and you are able to get a large amount of powder off of the parts.
After bead blasting, you can then finish it off with compressed air.

But. . . you'll never get 100% of the powder off. There is always a slight
amount of powder in nooks and crannies. I'd suggest a post process step
with a dip or spray. Maybe like a clear-coat, acrylic, or similar.

David K. Leigh (254)933-1000
Harvest Technologies fax(254)298-0125
Rapid Prototyping Services

-----Original Message-----
From: Steinar Killi []
Sent: Thursday, October 21, 2004 1:28 AM
To: Rp-Ml@Rapid. Lpt. Fi (E-mail)
Subject: [rp-ml] removing loose powder on sls parts

Dear List (at least those who are left)

We are producing sls parts for surgical use and the parts needs to be
100% dust free (no loose powder that can fall of during use) it is a lot
of parts and the geometry is slightly difficult..
My question is: does anyone now about a method to remove the loose
powder on a larger quantity (+200 parts) close to a 100% ? I am not
looking for a finishing method. (the surface does not have to be smooth)

Thanks for any response!

Steinar Killi
Received on Thu Oct 21 16:11:30 2004

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