From: "John Murray" 
To: "'Vladimir Galogaza'" ,
        "'ATM shore'" ,
        "Mirror Matic" 
Reply-To: "John Murray" 


G'day Vladimir
        Ernie in our group has successfully done 2 pours of dental stone
onto the one tool. The first didn't fully penetrate so after uhmming and
ahhing he poured the second. There were no probs with the tool.
        If you try the newest feature link from the website in my
signature, you will see that I have taped the tool to be cast to my orbital
sander. The first cast ok apart from running out the 3 holes I forgot to
plug (Doh!) Tonight I have cast a 160mm tile on edge tool with great
success. With the orbital sander clamped upside down in my vise, I poured
the dental stone and turned it on for a second or two. The rapid movement
causes the mix to flow into every nook and cranny. It also floats out
bubbles in the mix. As the mix solidifies, you can turn the sander on
briefly and this will liquify the mix again. I find this a very effective
way to cast tools with no voids in them.
        I'm crossposting this to the Mirror Matic list as well for their
info.

Cheers

John Murray
Whyalla
South Australia
Our ATM page is at
http://astronomy.sa86net.com

> -----Original Message-----
> From: owner-atm{at}shore.net [mailto:owner-atm{at}shore.net] On
> Behalf Of Vladimir Galogaza
> Sent: Friday, 7 March 2003 7:29 PM
> To: ATM shore
> Subject: ATM Pouring dental stone in installments
>
>
>
> Hi there,
>
> Is it absolutely necessary to pour tool in one go.
> Can not it be done in layers. If hydrostone or dental stone
> will stick sufficiently to tiles wouldn't it do the same to itself.
>
> One comment I already received is that:
>
> >When you use the tile-in-stone method, the stone fills in around the
> >tiles
> as well as
> >adhering to their backs.  I think that traps them in place more
> >effectively
> than
> >just tile to stone adhesion.
> >Mark Holm
>
> Anybody out there with first hand experience willing to share it?
>
> Regards
> Vladimir.
>
>
>

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