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.
Scott
-----Original Message-----
From: Doug Mitchell <dmitchel@ford.com>
To: Greg Pettengill <greg_p@indirect.com>
Cc: Rapid Prototyping Mailing List <rp-ml@bart.lpt.fi>
Date: Monday, May 17, 1999 7:24 AM
Subject: Re: Gympsum material
>Greg Pettengill wrote:
>[snip]
>> 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
>> http://www.indirect.com/www/greg_p/index.html
>
>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.
>
>Regards,
>
>--
>Doug Mitchell
>dmitchel@ford.com
>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/
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