Re: [CAD_CAM_EDM_DRO] Re: Cast resin for a cnc mill design - good idea?

He he he, paint a baking cake on the front of the oven door. Even more
cunning, actually bake a cake at the same time. How about using shreaded
steel instead of rock? I assume the longer threads of steel would give a
much stronger bonding with the resin. Or you could use bite sized shreddies
for economy?

John

----- Original Message -----
From: "Tom Murray" <thomasm923@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, April 23, 2001 4:56 AM
Subject: [CAD_CAM_EDM_DRO] Re: Cast resin for a cnc mill design - good idea?


> --- In CAD_CAM_EDM_DRO@y..., "Smoke" <gordonr@r...> wrote:
>
> > I looked into this once. The company I researched that does it
> > uses a mixture of silca and castable poy.
>
> Poy? Like the Hawaiian stuff? :)
>
> > the minimum "grit" size for the "silica"
> > is 1/2" diameter. After reading the info at the site, you find out
> >the "silica" is actually rocks...
>
> > The molds are custom made for each project and are EXPEN$IVE!
>
> Thanks for your input, Smoke...
> Remember, this would be a small mill. Large grit (or rather, ROCKS)
> would be out. I wouldn't want to "shake-down" a thick mass of resin
> and rubble. I'm thinking perhaps powdered stone or metal.
>
> A mold or two for a small mill wouldn't be that much trouble...
> (possible famous last words).
>
> > Another disadvantages to using resin (I've tried it) is that it
> > isn't anywhere near as strong as aluminum or steel, consequently
> > web cross sections need to be much thicker.
>
> I don't think that would be much of a problem with a small mill,
> especially if there was a metal sub-structure embedded within the
> epoxy.
>
> I haven't considered lost-wax casting. That is an interesting
> thought. Burning out the wax in my kitchen probably won't go over
> well with a certain someone, though...
>
> Tom Murray
>
>
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