RE: [rp-ml] Investment casting

From: Warner, Pat (
Date: Fri Nov 16 2007 - 17:36:49 EET


I would have thought that the SLA Viper (small frame) would do a good
job of these, providing that the correct resin is selected, and it is
capable of building the patterns in one piece. I only have experience of
waxes from 3D's Thermojet machine, but I would not think that it is an
appropriate route for these parts. I would doubt that the powder based
technologies (or at least those that I have seen) have the resolution
you are looking for. As I said in my previous reply though, SLA patterns
are relatively expensive and can be quite hard to process and I have no
experience of casting brass.

I hope this helps


-----Original Message-----
From: [] On
Behalf Of Bill Bedford
Sent: 16 November 2007 13:32
Subject: RE: [rp-ml] Investment casting

On Wed, 14 Nov 2007 22:44:50 -0000, Warner, Pat wrote:
Sorry the link were bad on an earlier post, now corrected


> It may be worth posting a
> generic geometry (if you can) and asking the list for comments from
> experience.

Thanks very much to for everyone's input on this, There have been a
number of useful replies that I will be following up, though I have the
feeling that I'm pushing the envelope in a different direction to most
people. Just to show you all what I've put graphics of parts I would
like to cast in here

< Frame.jpg>
< Bogie.jpg>

These would be cast in brass

The sizes are

Frames 117 x 21 x 15 mm
Bogie 32 x 23 x 8.5 mm

The side frames on each should ideally be less than 1mm thick.

Bill Bedford
"Nothing is as important as model railways and even that isn't very 
-some wiseguy somewhere 
For further information on the Renault F1 Team visit our web site at 
Renault F1 Team Limited
Registered in England no. 1806337
Registered Office: 16 Old Bailey London EC4M 7EG
WARNING: please ensure that you have adequate virus protection in place before you open or detach any documents attached to this email.
This e-mail may constitute privileged information. If you are not the intended recipient, you have received this confidential email and any attachments transmitted with it in error and you must not disclose copy, circulate or in any other way use or rely on this information.
E-mails to and from the Renault F1 Team are monitored for operational reasons and in accordance with lawful business practices.
The contents of this email are those of the individual and do not necessarily represent the views of the company.
Please note that this e-mail has been created in the knowledge that Internet e-mail is not a 100% secure communications medium. We advise that you understand and observe this lack of security when e-mailing us.
If you have received this email in error please forward to: quoting the sender, then delete the message and any attached documents

This archive was generated by hypermail 2.1.7 : Tue Jan 01 2008 - 18:13:09 EET