Re: Casting / Prototype Materials for Nasty Environment

From: Karsten (
Date: Thu Feb 06 2003 - 04:22:47 EET

I don't know of any cast urethane that can handle that kind of extreme
You might try looking into rapid tooling. They can make a mold using Rapid
Prototyping technology and then shoot production materials into it for a
short run count.
Hopefully someone can help in this field.
Good luck

----- Original Message -----
From: "Brad Fulghum" <>
To: <>
Sent: Wednesday, February 05, 2003 1:07 PM
Subject: Casting / Prototype Materials for Nasty Environment

> Greetings All!
> We are developing a product for a client which has some rather severe
> mechanical test requirements. This is a hand held test instrument, and
> the 2 part housing must pass the tests for plastic materials as defined
> for an "Intrinsically Safe" package (potentially explosive environment).
> We'd like to do the housing prototypes in a cast urethane or similar,
> but have had no success finding a material which will pass the falling
> dart test ( 2.2 lb steel weight with 1" dia. sphere at the impact point
> from about 28 inches). I won't even get into the other requirements.
> Anyone run up against this in the past? Any suggestions would be
> appreciated.
> Thanks....
> Brad Fulghum
> Paradigm Engineering, Inc.
> Ph. 480.446.0900
> Web Site -

This archive was generated by hypermail 2.1.7 : Sat Jan 17 2004 - 15:17:06 EET