USG makes rayite, I believe there are 3 grades, I only am familiar with
one, the machining grade, rayite-m I think.
It is not a slurry.... You mix it with water and pour into a casting
pattern, I use urethane rubber molds for this. In about 2-3 hours it is
cured and can be mounted on a milling machine as a solid block. It cuts
like butter with no dust, the rayite cuts off in big flakes leaving behine a
hard, polishable part with I will then often cast in aluminum filled
urethane for prototype tooling.
I have never seen rayite spread with a squeegee, it doesn't work that way.
From: Doug Mitchell <email@example.com>
To: Greg Pettengill <firstname.lastname@example.org>
Cc: Rapid Prototyping Mailing List <email@example.com>
Date: Monday, May 17, 1999 7:24 AM
Subject: Re: Gympsum material
>Greg Pettengill wrote:
>> I'm a little confused, maybe this is something I haven't seen
before.Rayite is a
>> castable material, what is this "You spread it with a
>> squeegee like device."
>> Best Regards
>> Greg Pettengill
>> (623) 846-8410
>Rayite was the group that was showing the US Gypsum material
>in their booth. It is a slurry material consisting of drywall
>mud. However it was thinned out. Therefore, you spread it
>around with a squeegee. Too thin for our application, although
>they did say that they were working on a thicker material.
>Ford Motor Company
>For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
This archive was generated by hypermail 2.1.2 : Tue Jun 05 2001 - 22:51:43 EEST