Re: 3-D printer

Larry Sexton

As I understand it, there are at least two groups working towards that goal,
but not necessarily for making patterns for freightcars. My observations
indicate the most likely success path with be using an injector head to
print the outer shell or first passes using ABS ribbon then using resin fill
for the interior. That would allow creating multi-pass layers without
bust-out and/or the ABS running.

There is still the issue with the necessary polishing to smooth out the
stair-stepping on angled or rounded surfaces. However, it appears the
various developers are making significant strides with the technology that
will allow freightcar patterns to be made at a reasonable cost in the not
too distant future, possibly well within our usable lifetime.

Larry Sexton

From: STMFC@... [mailto:STMFC@...] On Behalf Of
Schuyler Larrabee
Sent: Friday, February 10, 2012 11:23 PM
To: STMFC@...
Subject: RE: [STMFC] Re: Fwd: 3-D printer

Tim, the answer is in your own post! Sure, take styrene and add the details
using Archer weld lines and rivets for all those details. Most everything
else I can think of is free-standing 3D stuff, available as parts.


The process is already good enough for rivets -- as Archer has proved and
Tom Madden with his Pullman car rivets long before that.

Is it possible to start with a substrate of smooth styrene and add resin
detail on top of that? I wonder if that technique could be used to rapidly
produce masters for box car and reefer sides?

Tim O'Connor

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