[rp-ml] RE: Sinterstation 2500+ Part Piston Leak

Thank you Michael & David. Replacement sounds like the way to go. I may
shim the piston in the meantime to prevent the corner leaks.

Gregory M. Paulsen

Prototype Productions, Inc.

Office 703.858.0011 x314

Cell 540.974.1348

gpaulsen@protoprod.com <mailto:gpaulsen@protoprod.com>

www.protoprod.com <http://www.protoprod.com/>

From: Miller, Michael W [mailto:michael.w.miller@boeing.com]
Sent: Thursday, August 02, 2012 11:33 AM
To: David K. Leigh; Greg Paulsen; rp-ml@rapid.lpt.fi
Subject: RE: Sinterstation 2500+ Part Piston Leak

Piston seal generally needs replacing every few years. I also think
using a lower cylinder heater temp during preheat can increase the life
cycle of the seals, maybe 100F instead of 130F. And, the cylinder wall
on my Vanguard was bowed outward near the bottom which caused leakage
near the end of a tall build. I wedged some blocks between the part
cylinder and the feed cylinder to straighten it out a bit. Arrange such
that the pressure is applied to the center of the part wall, the corners
of the feed wall.

Michael W Miller (michael.w.miller@boeing.com)
The Boeing Company M/C 47-27 9R-TE-QK2A
Desk) 206-662-7495 Cell 206-351-7773
Rapid Prototype & Modeling 662-7498 SLS 662-7495
http://dmp-rpm.web.boeing.com/index.cfm
Disclaimer: Engineer and out the other!

________________________________

From: owner-rp-ml@rapid.lpt.fi [mailto:owner-rp-ml@rapid.lpt.fi] On
Behalf Of David K. Leigh
Sent: Wednesday, August 01, 2012 12:53 PM
To: Greg Paulsen; rp-ml@rapid.lpt.fi
Subject: [rp-ml] RE: Sinterstation 2500+ Part Piston Leak

We've run into similar issues in the past - several ways to solve it.
Best way is to replace the piston seal. We've also noticed that the
addition of too much flow additive can cause issues with seals that are
considered good.

David K. Leigh

_______________________________________________________

Harvest Technologies | Rapid Prototyping and Production Services

815 Kirkley Blvd. | Belton | TX | 76513

Phone: 254.933.1000 | Fax: 254.298.0125

www.harvest-tech.com <http://www.harvest-tech.com/> | "Where Innovation
Takes Shape"

From: owner-rp-ml@rapid.lpt.fi [mailto:owner-rp-ml@rapid.lpt.fi] On
Behalf Of Greg Paulsen
Sent: Wednesday, August 01, 2012 10:53 AM
To: rp-ml@rapid.lpt.fi
Subject: [rp-ml] Sinterstation 2500+ Part Piston Leak

Howdy,

I have a powder/nitrogen leak occurring between the part piston and the
piston wall on a Sinterstation 2500+ machine while running. After about
1-1.5" of material the gap fills enough that there is no visible
drainage. So far it has not affected any parts since it is off in the
front right corner (facing the machine) but I would like to resolve the
issue. Has anyone else experienced this? Any suggestions for
troubleshooting?

Thank you,

Gregory M. Paulsen

Project Engineer

Prototype Productions, Inc.
Received on Thu Aug 02 18:45:14 2012